1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/super.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp * 10ac27a0ecSDave Kleikamp * from 11ac27a0ecSDave Kleikamp * 12ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 13ac27a0ecSDave Kleikamp * 14ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 15ac27a0ecSDave Kleikamp * 16ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 17ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 18ac27a0ecSDave Kleikamp */ 19ac27a0ecSDave Kleikamp 20ac27a0ecSDave Kleikamp #include <linux/module.h> 21ac27a0ecSDave Kleikamp #include <linux/string.h> 22ac27a0ecSDave Kleikamp #include <linux/fs.h> 23ac27a0ecSDave Kleikamp #include <linux/time.h> 24c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2866114cadSTejun Heo #include <linux/backing-dev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ef510424SDan Williams #include <linux/dax.h> 427c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 43ee73f9a5SJeff Layton #include <linux/iversion.h> 44c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 45c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 46bfff6873SLukas Czerner #include <linux/kthread.h> 47bfff6873SLukas Czerner #include <linux/freezer.h> 489a089b21SGabriel Krisman Bertazi #include <linux/fsnotify.h> 49e5a185c2SLukas Czerner #include <linux/fs_context.h> 50e5a185c2SLukas Czerner #include <linux/fs_parser.h> 51bfff6873SLukas Czerner 523dcf5451SChristoph Hellwig #include "ext4.h" 534a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 543dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 55ac27a0ecSDave Kleikamp #include "xattr.h" 56ac27a0ecSDave Kleikamp #include "acl.h" 573661d286STheodore Ts'o #include "mballoc.h" 580c9ec4beSDarrick J. Wong #include "fsmap.h" 59ac27a0ecSDave Kleikamp 609bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 619bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 629bffad1eSTheodore Ts'o 630b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 6459ebc7fdSZheng Yongjun static DEFINE_MUTEX(ext4_li_mtx); 65e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 669f6200bbSTheodore Ts'o 67617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 68ac27a0ecSDave Kleikamp unsigned long journal_devnum); 692adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 702d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb); 714392fbc4SJan Kara static int ext4_commit_super(struct super_block *sb); 7211215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 73617ba13bSMingming Cao struct ext4_super_block *es); 7411215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 75617ba13bSMingming Cao struct ext4_super_block *es); 76617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 77617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 78c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 79c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 812035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 85c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 86c6cb7e77SEric Whitney unsigned int journal_inum); 87da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc); 88b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 89e6e268cbSLukas Czerner struct super_block *sb); 9085456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb); 9102f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param); 92cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc); 93cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc); 94cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc); 95cebe85d5SLukas Czerner static int ext4_init_fs_context(struct fs_context *fc); 96cebe85d5SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[]; 97ac27a0ecSDave Kleikamp 98e74031fdSJan Kara /* 99e74031fdSJan Kara * Lock ordering 100e74031fdSJan Kara * 101e74031fdSJan Kara * page fault path: 102d4f5258eSJan Kara * mmap_lock -> sb_start_pagefault -> invalidate_lock (r) -> transaction start 103d4f5258eSJan Kara * -> page lock -> i_data_sem (rw) 104e74031fdSJan Kara * 105e74031fdSJan Kara * buffered write path: 106c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 107e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 108e74031fdSJan Kara * i_data_sem (rw) 109e74031fdSJan Kara * 110e74031fdSJan Kara * truncate: 111d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> i_mmap_rwsem (w) -> 112d4f5258eSJan Kara * page lock 113d4f5258eSJan Kara * sb_start_write -> i_mutex -> invalidate_lock (w) -> transaction start -> 1141d39834fSNikolay Borisov * i_data_sem (rw) 115e74031fdSJan Kara * 116e74031fdSJan Kara * direct IO: 117c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1181d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 119e74031fdSJan Kara * 120e74031fdSJan Kara * writepages: 121e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 122e74031fdSJan Kara */ 123e74031fdSJan Kara 12402f960f8SLukas Czerner static const struct fs_context_operations ext4_context_ops = { 12502f960f8SLukas Czerner .parse_param = ext4_parse_param, 126cebe85d5SLukas Czerner .get_tree = ext4_get_tree, 127cebe85d5SLukas Czerner .reconfigure = ext4_reconfigure, 128cebe85d5SLukas Czerner .free = ext4_fc_free, 12902f960f8SLukas Czerner }; 13002f960f8SLukas Czerner 13102f960f8SLukas Czerner 132c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1332035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1342035e776STheodore Ts'o .owner = THIS_MODULE, 1352035e776STheodore Ts'o .name = "ext2", 136cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 137cebe85d5SLukas Czerner .parameters = ext4_param_specs, 1382035e776STheodore Ts'o .kill_sb = kill_block_super, 1392035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1402035e776STheodore Ts'o }; 1417f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 142fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1432035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1442035e776STheodore Ts'o #else 1452035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1462035e776STheodore Ts'o #endif 1472035e776STheodore Ts'o 1482035e776STheodore Ts'o 149ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 150ba69f9abSJan Kara .owner = THIS_MODULE, 151ba69f9abSJan Kara .name = "ext3", 152cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 153cebe85d5SLukas Czerner .parameters = ext4_param_specs, 154ba69f9abSJan Kara .kill_sb = kill_block_super, 155ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 156ba69f9abSJan Kara }; 1577f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 158fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 159ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 160bd81d8eeSLaurent Vivier 161fa491b14Szhangyi (F) 16267c0f556SBart Van Assche static inline void __ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, 163fa491b14Szhangyi (F) bh_end_io_t *end_io) 164fa491b14Szhangyi (F) { 165fb265c9cSTheodore Ts'o /* 166fa491b14Szhangyi (F) * buffer's verified bit is no longer valid after reading from 167fa491b14Szhangyi (F) * disk again due to write out error, clear it to make sure we 168fa491b14Szhangyi (F) * recheck the buffer contents. 169fa491b14Szhangyi (F) */ 170fa491b14Szhangyi (F) clear_buffer_verified(bh); 171fa491b14Szhangyi (F) 172fa491b14Szhangyi (F) bh->b_end_io = end_io ? end_io : end_buffer_read_sync; 173fa491b14Szhangyi (F) get_bh(bh); 1741420c4a5SBart Van Assche submit_bh(REQ_OP_READ | op_flags, bh); 175fa491b14Szhangyi (F) } 176fa491b14Szhangyi (F) 17767c0f556SBart Van Assche void ext4_read_bh_nowait(struct buffer_head *bh, blk_opf_t op_flags, 178fa491b14Szhangyi (F) bh_end_io_t *end_io) 179fa491b14Szhangyi (F) { 180fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 181fa491b14Szhangyi (F) 182fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 183fa491b14Szhangyi (F) unlock_buffer(bh); 184fa491b14Szhangyi (F) return; 185fa491b14Szhangyi (F) } 186fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 187fa491b14Szhangyi (F) } 188fa491b14Szhangyi (F) 18967c0f556SBart Van Assche int ext4_read_bh(struct buffer_head *bh, blk_opf_t op_flags, bh_end_io_t *end_io) 190fa491b14Szhangyi (F) { 191fa491b14Szhangyi (F) BUG_ON(!buffer_locked(bh)); 192fa491b14Szhangyi (F) 193fa491b14Szhangyi (F) if (ext4_buffer_uptodate(bh)) { 194fa491b14Szhangyi (F) unlock_buffer(bh); 195fa491b14Szhangyi (F) return 0; 196fa491b14Szhangyi (F) } 197fa491b14Szhangyi (F) 198fa491b14Szhangyi (F) __ext4_read_bh(bh, op_flags, end_io); 199fa491b14Szhangyi (F) 200fa491b14Szhangyi (F) wait_on_buffer(bh); 201fa491b14Szhangyi (F) if (buffer_uptodate(bh)) 202fa491b14Szhangyi (F) return 0; 203fa491b14Szhangyi (F) return -EIO; 204fa491b14Szhangyi (F) } 205fa491b14Szhangyi (F) 20667c0f556SBart Van Assche int ext4_read_bh_lock(struct buffer_head *bh, blk_opf_t op_flags, bool wait) 207fa491b14Szhangyi (F) { 2080b73284cSZhang Yi lock_buffer(bh); 2090b73284cSZhang Yi if (!wait) { 210fa491b14Szhangyi (F) ext4_read_bh_nowait(bh, op_flags, NULL); 211fa491b14Szhangyi (F) return 0; 212fa491b14Szhangyi (F) } 2130b73284cSZhang Yi return ext4_read_bh(bh, op_flags, NULL); 214fa491b14Szhangyi (F) } 215fa491b14Szhangyi (F) 216fb265c9cSTheodore Ts'o /* 2178394a6abSzhangyi (F) * This works like __bread_gfp() except it uses ERR_PTR for error 218fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 219fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 220fb265c9cSTheodore Ts'o * return. 221fb265c9cSTheodore Ts'o */ 2228394a6abSzhangyi (F) static struct buffer_head *__ext4_sb_bread_gfp(struct super_block *sb, 22367c0f556SBart Van Assche sector_t block, 22467c0f556SBart Van Assche blk_opf_t op_flags, gfp_t gfp) 225fb265c9cSTheodore Ts'o { 2262d069c08Szhangyi (F) struct buffer_head *bh; 2272d069c08Szhangyi (F) int ret; 228fb265c9cSTheodore Ts'o 2298394a6abSzhangyi (F) bh = sb_getblk_gfp(sb, block, gfp); 230fb265c9cSTheodore Ts'o if (bh == NULL) 231fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 232cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 233fb265c9cSTheodore Ts'o return bh; 2342d069c08Szhangyi (F) 2352d069c08Szhangyi (F) ret = ext4_read_bh_lock(bh, REQ_META | op_flags, true); 2362d069c08Szhangyi (F) if (ret) { 237fb265c9cSTheodore Ts'o put_bh(bh); 2382d069c08Szhangyi (F) return ERR_PTR(ret); 2392d069c08Szhangyi (F) } 2402d069c08Szhangyi (F) return bh; 241fb265c9cSTheodore Ts'o } 242fb265c9cSTheodore Ts'o 2438394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread(struct super_block *sb, sector_t block, 24467c0f556SBart Van Assche blk_opf_t op_flags) 2458394a6abSzhangyi (F) { 2468394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, op_flags, __GFP_MOVABLE); 2478394a6abSzhangyi (F) } 2488394a6abSzhangyi (F) 2498394a6abSzhangyi (F) struct buffer_head *ext4_sb_bread_unmovable(struct super_block *sb, 2508394a6abSzhangyi (F) sector_t block) 2518394a6abSzhangyi (F) { 2528394a6abSzhangyi (F) return __ext4_sb_bread_gfp(sb, block, 0, 0); 2538394a6abSzhangyi (F) } 2548394a6abSzhangyi (F) 2555df1d412Szhangyi (F) void ext4_sb_breadahead_unmovable(struct super_block *sb, sector_t block) 2565df1d412Szhangyi (F) { 2575df1d412Szhangyi (F) struct buffer_head *bh = sb_getblk_gfp(sb, block, 0); 2585df1d412Szhangyi (F) 2595df1d412Szhangyi (F) if (likely(bh)) { 2600b73284cSZhang Yi if (trylock_buffer(bh)) 2610b73284cSZhang Yi ext4_read_bh_nowait(bh, REQ_RAHEAD, NULL); 2625df1d412Szhangyi (F) brelse(bh); 2635df1d412Szhangyi (F) } 264c197855eSStephen Hemminger } 265a9c47317SDarrick J. Wong 266a9c47317SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 2679aa5d32bSDmitry Monakhov struct ext4_super_block *es) 268a9c47317SDarrick J. Wong { 269a9c47317SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 270a9c47317SDarrick J. Wong return 1; 271a9c47317SDarrick J. Wong 272a9c47317SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 27306db49e6STheodore Ts'o } 274a9c47317SDarrick J. Wong 275bbc605cdSLukas Czerner __le32 ext4_superblock_csum(struct super_block *sb, 276a9c47317SDarrick J. Wong struct ext4_super_block *es) 277a9c47317SDarrick J. Wong { 278a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 279a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 280a9c47317SDarrick J. Wong __u32 csum; 281a9c47317SDarrick J. Wong 282a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 283a9c47317SDarrick J. Wong 284a9c47317SDarrick J. Wong return cpu_to_le32(csum); 285a9c47317SDarrick J. Wong } 286a9c47317SDarrick J. Wong 287a9c47317SDarrick J. Wong static int ext4_superblock_csum_verify(struct super_block *sb, 288a9c47317SDarrick J. Wong struct ext4_super_block *es) 289a9c47317SDarrick J. Wong { 290a9c47317SDarrick J. Wong if (!ext4_has_metadata_csum(sb)) 291a9c47317SDarrick J. Wong return 1; 292a9c47317SDarrick J. Wong 293a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 294a9c47317SDarrick J. Wong } 295a9c47317SDarrick J. Wong 296a9c47317SDarrick J. Wong void ext4_superblock_csum_set(struct super_block *sb) 297a9c47317SDarrick J. Wong { 29806db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 29906db49e6STheodore Ts'o 3009aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 301a9c47317SDarrick J. Wong return; 302a9c47317SDarrick J. Wong 303a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 304a9c47317SDarrick J. Wong } 305a9c47317SDarrick J. Wong 3068fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 3078fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 308bd81d8eeSLaurent Vivier { 3093a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 3108fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3118fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 312bd81d8eeSLaurent Vivier } 313bd81d8eeSLaurent Vivier 3148fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 3158fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 316bd81d8eeSLaurent Vivier { 3175272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 3188fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3198fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 320bd81d8eeSLaurent Vivier } 321bd81d8eeSLaurent Vivier 3228fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 3238fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 324bd81d8eeSLaurent Vivier { 3255272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 3268fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 3278fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 328bd81d8eeSLaurent Vivier } 329bd81d8eeSLaurent Vivier 330021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 331560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 332560671a0SAneesh Kumar K.V { 333560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 334560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 335560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 336560671a0SAneesh Kumar K.V } 337560671a0SAneesh Kumar K.V 338560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 339560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 340560671a0SAneesh Kumar K.V { 341560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 342560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 343560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 344560671a0SAneesh Kumar K.V } 345560671a0SAneesh Kumar K.V 346560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 347560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 348560671a0SAneesh Kumar K.V { 349560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 350560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 351560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 352560671a0SAneesh Kumar K.V } 353560671a0SAneesh Kumar K.V 354560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 355560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 356560671a0SAneesh Kumar K.V { 357560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 358560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 359560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 360560671a0SAneesh Kumar K.V } 361560671a0SAneesh Kumar K.V 3628fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 3638fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 364bd81d8eeSLaurent Vivier { 3653a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 3668fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3678fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 368bd81d8eeSLaurent Vivier } 369bd81d8eeSLaurent Vivier 3708fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 3718fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 372bd81d8eeSLaurent Vivier { 3735272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 3748fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3758fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 376bd81d8eeSLaurent Vivier } 377bd81d8eeSLaurent Vivier 3788fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3798fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 380bd81d8eeSLaurent Vivier { 3815272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3828fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3838fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 384bd81d8eeSLaurent Vivier } 385bd81d8eeSLaurent Vivier 386021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 387560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 388560671a0SAneesh Kumar K.V { 389560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 390560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 391560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 392560671a0SAneesh Kumar K.V } 393560671a0SAneesh Kumar K.V 394560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 395560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 396560671a0SAneesh Kumar K.V { 397560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 398560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 399560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 400560671a0SAneesh Kumar K.V } 401560671a0SAneesh Kumar K.V 402560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 403560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 404560671a0SAneesh Kumar K.V { 405560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 406560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 407560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 408560671a0SAneesh Kumar K.V } 409560671a0SAneesh Kumar K.V 410560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 411560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 412560671a0SAneesh Kumar K.V { 413560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 414560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 415560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 416560671a0SAneesh Kumar K.V } 417560671a0SAneesh Kumar K.V 418c92dc856SJan Kara static void __ext4_update_tstamp(__le32 *lo, __u8 *hi, time64_t now) 4196a0678a7SArnd Bergmann { 4206a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 4216a0678a7SArnd Bergmann 4226a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 4236a0678a7SArnd Bergmann *hi = upper_32_bits(now); 4246a0678a7SArnd Bergmann } 4256a0678a7SArnd Bergmann 4266a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 4276a0678a7SArnd Bergmann { 4286a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 4296a0678a7SArnd Bergmann } 4306a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 431c92dc856SJan Kara __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi, \ 432c92dc856SJan Kara ktime_get_real_seconds()) 4336a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 4346a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 435d3d1faf6SCurt Wohlgemuth 436bdfe0cbdSTheodore Ts'o /* 437bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 438bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 439bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 440bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 441bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 442bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 443bdfe0cbdSTheodore Ts'o */ 444bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 445bdfe0cbdSTheodore Ts'o { 446bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 447bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 448bdfe0cbdSTheodore Ts'o 449bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 450bdfe0cbdSTheodore Ts'o } 451bdfe0cbdSTheodore Ts'o 45218aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 45318aadd47SBobi Jam { 45418aadd47SBobi Jam struct super_block *sb = journal->j_private; 45518aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 45618aadd47SBobi Jam int error = is_journal_aborted(journal); 4575d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 45818aadd47SBobi Jam 4595d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 460a0154344SDaeho Jeong 461a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 462a0154344SDaeho Jeong 46318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4645d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4655d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4665d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 46718aadd47SBobi Jam list_del_init(&jce->jce_list); 46818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 46918aadd47SBobi Jam jce->jce_func(sb, jce, error); 47018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 47118aadd47SBobi Jam } 47218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 47318aadd47SBobi Jam } 4741c13d5c0STheodore Ts'o 475afb585a9SMauricio Faria de Oliveira /* 476afb585a9SMauricio Faria de Oliveira * This writepage callback for write_cache_pages() 477afb585a9SMauricio Faria de Oliveira * takes care of a few cases after page cleaning. 478afb585a9SMauricio Faria de Oliveira * 479afb585a9SMauricio Faria de Oliveira * write_cache_pages() already checks for dirty pages 480afb585a9SMauricio Faria de Oliveira * and calls clear_page_dirty_for_io(), which we want, 481afb585a9SMauricio Faria de Oliveira * to write protect the pages. 482afb585a9SMauricio Faria de Oliveira * 483afb585a9SMauricio Faria de Oliveira * However, we may have to redirty a page (see below.) 484afb585a9SMauricio Faria de Oliveira */ 485afb585a9SMauricio Faria de Oliveira static int ext4_journalled_writepage_callback(struct page *page, 486afb585a9SMauricio Faria de Oliveira struct writeback_control *wbc, 487afb585a9SMauricio Faria de Oliveira void *data) 488afb585a9SMauricio Faria de Oliveira { 489afb585a9SMauricio Faria de Oliveira transaction_t *transaction = (transaction_t *) data; 490afb585a9SMauricio Faria de Oliveira struct buffer_head *bh, *head; 491afb585a9SMauricio Faria de Oliveira struct journal_head *jh; 492afb585a9SMauricio Faria de Oliveira 493afb585a9SMauricio Faria de Oliveira bh = head = page_buffers(page); 494afb585a9SMauricio Faria de Oliveira do { 495afb585a9SMauricio Faria de Oliveira /* 496afb585a9SMauricio Faria de Oliveira * We have to redirty a page in these cases: 497afb585a9SMauricio Faria de Oliveira * 1) If buffer is dirty, it means the page was dirty because it 498afb585a9SMauricio Faria de Oliveira * contains a buffer that needs checkpointing. So the dirty bit 499afb585a9SMauricio Faria de Oliveira * needs to be preserved so that checkpointing writes the buffer 500afb585a9SMauricio Faria de Oliveira * properly. 501afb585a9SMauricio Faria de Oliveira * 2) If buffer is not part of the committing transaction 502afb585a9SMauricio Faria de Oliveira * (we may have just accidentally come across this buffer because 503afb585a9SMauricio Faria de Oliveira * inode range tracking is not exact) or if the currently running 504afb585a9SMauricio Faria de Oliveira * transaction already contains this buffer as well, dirty bit 505afb585a9SMauricio Faria de Oliveira * needs to be preserved so that the buffer gets writeprotected 506afb585a9SMauricio Faria de Oliveira * properly on running transaction's commit. 507afb585a9SMauricio Faria de Oliveira */ 508afb585a9SMauricio Faria de Oliveira jh = bh2jh(bh); 509afb585a9SMauricio Faria de Oliveira if (buffer_dirty(bh) || 510afb585a9SMauricio Faria de Oliveira (jh && (jh->b_transaction != transaction || 511afb585a9SMauricio Faria de Oliveira jh->b_next_transaction))) { 512afb585a9SMauricio Faria de Oliveira redirty_page_for_writepage(wbc, page); 513afb585a9SMauricio Faria de Oliveira goto out; 514afb585a9SMauricio Faria de Oliveira } 515afb585a9SMauricio Faria de Oliveira } while ((bh = bh->b_this_page) != head); 516afb585a9SMauricio Faria de Oliveira 517afb585a9SMauricio Faria de Oliveira out: 518afb585a9SMauricio Faria de Oliveira return AOP_WRITEPAGE_ACTIVATE; 519afb585a9SMauricio Faria de Oliveira } 520afb585a9SMauricio Faria de Oliveira 521afb585a9SMauricio Faria de Oliveira static int ext4_journalled_submit_inode_data_buffers(struct jbd2_inode *jinode) 522afb585a9SMauricio Faria de Oliveira { 523afb585a9SMauricio Faria de Oliveira struct address_space *mapping = jinode->i_vfs_inode->i_mapping; 524afb585a9SMauricio Faria de Oliveira struct writeback_control wbc = { 525afb585a9SMauricio Faria de Oliveira .sync_mode = WB_SYNC_ALL, 526afb585a9SMauricio Faria de Oliveira .nr_to_write = LONG_MAX, 527afb585a9SMauricio Faria de Oliveira .range_start = jinode->i_dirty_start, 528afb585a9SMauricio Faria de Oliveira .range_end = jinode->i_dirty_end, 529afb585a9SMauricio Faria de Oliveira }; 530afb585a9SMauricio Faria de Oliveira 531afb585a9SMauricio Faria de Oliveira return write_cache_pages(mapping, &wbc, 532afb585a9SMauricio Faria de Oliveira ext4_journalled_writepage_callback, 533afb585a9SMauricio Faria de Oliveira jinode->i_transaction); 534afb585a9SMauricio Faria de Oliveira } 535afb585a9SMauricio Faria de Oliveira 536afb585a9SMauricio Faria de Oliveira static int ext4_journal_submit_inode_data_buffers(struct jbd2_inode *jinode) 537afb585a9SMauricio Faria de Oliveira { 538afb585a9SMauricio Faria de Oliveira int ret; 539afb585a9SMauricio Faria de Oliveira 540afb585a9SMauricio Faria de Oliveira if (ext4_should_journal_data(jinode->i_vfs_inode)) 541afb585a9SMauricio Faria de Oliveira ret = ext4_journalled_submit_inode_data_buffers(jinode); 542afb585a9SMauricio Faria de Oliveira else 543afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_submit_inode_data_buffers(jinode); 544afb585a9SMauricio Faria de Oliveira 545afb585a9SMauricio Faria de Oliveira return ret; 546afb585a9SMauricio Faria de Oliveira } 547afb585a9SMauricio Faria de Oliveira 548afb585a9SMauricio Faria de Oliveira static int ext4_journal_finish_inode_data_buffers(struct jbd2_inode *jinode) 549afb585a9SMauricio Faria de Oliveira { 550afb585a9SMauricio Faria de Oliveira int ret = 0; 551afb585a9SMauricio Faria de Oliveira 552afb585a9SMauricio Faria de Oliveira if (!ext4_should_journal_data(jinode->i_vfs_inode)) 553afb585a9SMauricio Faria de Oliveira ret = jbd2_journal_finish_inode_data_buffers(jinode); 554afb585a9SMauricio Faria de Oliveira 555afb585a9SMauricio Faria de Oliveira return ret; 556afb585a9SMauricio Faria de Oliveira } 557afb585a9SMauricio Faria de Oliveira 5581dc1097fSJan Kara static bool system_going_down(void) 5591dc1097fSJan Kara { 5601dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 5611dc1097fSJan Kara || system_state == SYSTEM_RESTART; 5621dc1097fSJan Kara } 5631dc1097fSJan Kara 56402a7780eSJan Kara struct ext4_err_translation { 56502a7780eSJan Kara int code; 56602a7780eSJan Kara int errno; 56702a7780eSJan Kara }; 56802a7780eSJan Kara 56902a7780eSJan Kara #define EXT4_ERR_TRANSLATE(err) { .code = EXT4_ERR_##err, .errno = err } 57002a7780eSJan Kara 57102a7780eSJan Kara static struct ext4_err_translation err_translation[] = { 57202a7780eSJan Kara EXT4_ERR_TRANSLATE(EIO), 57302a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOMEM), 57402a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSBADCRC), 57502a7780eSJan Kara EXT4_ERR_TRANSLATE(EFSCORRUPTED), 57602a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOSPC), 57702a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOKEY), 57802a7780eSJan Kara EXT4_ERR_TRANSLATE(EROFS), 57902a7780eSJan Kara EXT4_ERR_TRANSLATE(EFBIG), 58002a7780eSJan Kara EXT4_ERR_TRANSLATE(EEXIST), 58102a7780eSJan Kara EXT4_ERR_TRANSLATE(ERANGE), 58202a7780eSJan Kara EXT4_ERR_TRANSLATE(EOVERFLOW), 58302a7780eSJan Kara EXT4_ERR_TRANSLATE(EBUSY), 58402a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTDIR), 58502a7780eSJan Kara EXT4_ERR_TRANSLATE(ENOTEMPTY), 58602a7780eSJan Kara EXT4_ERR_TRANSLATE(ESHUTDOWN), 58702a7780eSJan Kara EXT4_ERR_TRANSLATE(EFAULT), 58802a7780eSJan Kara }; 58902a7780eSJan Kara 59002a7780eSJan Kara static int ext4_errno_to_code(int errno) 59102a7780eSJan Kara { 59202a7780eSJan Kara int i; 59302a7780eSJan Kara 59402a7780eSJan Kara for (i = 0; i < ARRAY_SIZE(err_translation); i++) 59502a7780eSJan Kara if (err_translation[i].errno == errno) 59602a7780eSJan Kara return err_translation[i].code; 59702a7780eSJan Kara return EXT4_ERR_UNKNOWN; 59802a7780eSJan Kara } 59902a7780eSJan Kara 6002d01ddc8SJan Kara static void save_error_info(struct super_block *sb, int error, 60140676623SJan Kara __u32 ino, __u64 block, 60240676623SJan Kara const char *func, unsigned int line) 60340676623SJan Kara { 604c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 60540676623SJan Kara 60602a7780eSJan Kara /* We default to EFSCORRUPTED error... */ 60702a7780eSJan Kara if (error == 0) 60802a7780eSJan Kara error = EFSCORRUPTED; 609c92dc856SJan Kara 610c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 611c92dc856SJan Kara sbi->s_add_error_count++; 612c92dc856SJan Kara sbi->s_last_error_code = error; 613c92dc856SJan Kara sbi->s_last_error_line = line; 614c92dc856SJan Kara sbi->s_last_error_ino = ino; 615c92dc856SJan Kara sbi->s_last_error_block = block; 616c92dc856SJan Kara sbi->s_last_error_func = func; 617c92dc856SJan Kara sbi->s_last_error_time = ktime_get_real_seconds(); 618c92dc856SJan Kara if (!sbi->s_first_error_time) { 619c92dc856SJan Kara sbi->s_first_error_code = error; 620c92dc856SJan Kara sbi->s_first_error_line = line; 621c92dc856SJan Kara sbi->s_first_error_ino = ino; 622c92dc856SJan Kara sbi->s_first_error_block = block; 623c92dc856SJan Kara sbi->s_first_error_func = func; 624c92dc856SJan Kara sbi->s_first_error_time = sbi->s_last_error_time; 62540676623SJan Kara } 626c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 62740676623SJan Kara } 62840676623SJan Kara 629ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 630ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 631ac27a0ecSDave Kleikamp * 632ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 633617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 634ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 635ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 636ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 637ac27a0ecSDave Kleikamp * write out the superblock safely. 638ac27a0ecSDave Kleikamp * 639dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 640d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 641ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 642014c9caaSJan Kara * 643014c9caaSJan Kara * If force_ro is set, we unconditionally force the filesystem into an 644014c9caaSJan Kara * ABORT|READONLY state, unless the error response on the fs has been set to 645014c9caaSJan Kara * panic in which case we take the easy way out and panic immediately. This is 646014c9caaSJan Kara * used to deal with unrecoverable failures such as journal IO errors or ENOMEM 647014c9caaSJan Kara * at a critical moment in log management. 648ac27a0ecSDave Kleikamp */ 649e789ca0cSJan Kara static void ext4_handle_error(struct super_block *sb, bool force_ro, int error, 650e789ca0cSJan Kara __u32 ino, __u64 block, 651e789ca0cSJan Kara const char *func, unsigned int line) 652ac27a0ecSDave Kleikamp { 653b08070ecSJan Kara journal_t *journal = EXT4_SB(sb)->s_journal; 6542d01ddc8SJan Kara bool continue_fs = !force_ro && test_opt(sb, ERRORS_CONT); 655b08070ecSJan Kara 656e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 657327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 658327eaf73STheodore Ts'o WARN_ON_ONCE(1); 659327eaf73STheodore Ts'o 6602d01ddc8SJan Kara if (!continue_fs && !sb_rdonly(sb)) { 6619b5f6c9bSHarshad Shirwadkar ext4_set_mount_flag(sb, EXT4_MF_FS_ABORTED); 662ac27a0ecSDave Kleikamp if (journal) 663dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 6642d01ddc8SJan Kara } 6652d01ddc8SJan Kara 6662d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 6672d01ddc8SJan Kara save_error_info(sb, error, ino, block, func, line); 6682d01ddc8SJan Kara /* 6692d01ddc8SJan Kara * In case the fs should keep running, we need to writeout 6702d01ddc8SJan Kara * superblock through the journal. Due to lock ordering 6712d01ddc8SJan Kara * constraints, it may not be safe to do it right here so we 6722d01ddc8SJan Kara * defer superblock flushing to a workqueue. 6732d01ddc8SJan Kara */ 674bb9464e0Syangerkun if (continue_fs && journal) 6752d01ddc8SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 6762d01ddc8SJan Kara else 6772d01ddc8SJan Kara ext4_commit_super(sb); 6782d01ddc8SJan Kara } 6792d01ddc8SJan Kara 6801dc1097fSJan Kara /* 6811dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 6821dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 6831dc1097fSJan Kara * disabled. 6841dc1097fSJan Kara */ 685014c9caaSJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 686617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 687ac27a0ecSDave Kleikamp sb->s_id); 688ac27a0ecSDave Kleikamp } 689ac2f7ca5SYe Bin 690ac2f7ca5SYe Bin if (sb_rdonly(sb) || continue_fs) 691ac2f7ca5SYe Bin return; 692ac2f7ca5SYe Bin 693014c9caaSJan Kara ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 694014c9caaSJan Kara /* 695014c9caaSJan Kara * Make sure updated value of ->s_mount_flags will be visible before 696014c9caaSJan Kara * ->s_flags update 697014c9caaSJan Kara */ 698014c9caaSJan Kara smp_wmb(); 699014c9caaSJan Kara sb->s_flags |= SB_RDONLY; 7004327ba52SDaeho Jeong } 701ac27a0ecSDave Kleikamp 702c92dc856SJan Kara static void flush_stashed_error_work(struct work_struct *work) 703c92dc856SJan Kara { 704c92dc856SJan Kara struct ext4_sb_info *sbi = container_of(work, struct ext4_sb_info, 705c92dc856SJan Kara s_error_work); 7062d01ddc8SJan Kara journal_t *journal = sbi->s_journal; 7072d01ddc8SJan Kara handle_t *handle; 708c92dc856SJan Kara 7092d01ddc8SJan Kara /* 7102d01ddc8SJan Kara * If the journal is still running, we have to write out superblock 7112d01ddc8SJan Kara * through the journal to avoid collisions of other journalled sb 7122d01ddc8SJan Kara * updates. 7132d01ddc8SJan Kara * 7142d01ddc8SJan Kara * We use directly jbd2 functions here to avoid recursing back into 7152d01ddc8SJan Kara * ext4 error handling code during handling of previous errors. 7162d01ddc8SJan Kara */ 7172d01ddc8SJan Kara if (!sb_rdonly(sbi->s_sb) && journal) { 718558d6450SYe Bin struct buffer_head *sbh = sbi->s_sbh; 7192d01ddc8SJan Kara handle = jbd2_journal_start(journal, 1); 7202d01ddc8SJan Kara if (IS_ERR(handle)) 7212d01ddc8SJan Kara goto write_directly; 722558d6450SYe Bin if (jbd2_journal_get_write_access(handle, sbh)) { 7232d01ddc8SJan Kara jbd2_journal_stop(handle); 7242d01ddc8SJan Kara goto write_directly; 7252d01ddc8SJan Kara } 7262d01ddc8SJan Kara ext4_update_super(sbi->s_sb); 727558d6450SYe Bin if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 728558d6450SYe Bin ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 729558d6450SYe Bin "superblock detected"); 730558d6450SYe Bin clear_buffer_write_io_error(sbh); 731558d6450SYe Bin set_buffer_uptodate(sbh); 732558d6450SYe Bin } 733558d6450SYe Bin 734558d6450SYe Bin if (jbd2_journal_dirty_metadata(handle, sbh)) { 7352d01ddc8SJan Kara jbd2_journal_stop(handle); 7362d01ddc8SJan Kara goto write_directly; 7372d01ddc8SJan Kara } 7382d01ddc8SJan Kara jbd2_journal_stop(handle); 739d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 7402d01ddc8SJan Kara return; 7412d01ddc8SJan Kara } 7422d01ddc8SJan Kara write_directly: 7432d01ddc8SJan Kara /* 7442d01ddc8SJan Kara * Write through journal failed. Write sb directly to get error info 7452d01ddc8SJan Kara * out and hope for the best. 7462d01ddc8SJan Kara */ 7474392fbc4SJan Kara ext4_commit_super(sbi->s_sb); 748d578b994SJonathan Davies ext4_notify_error_sysfs(sbi); 749ac27a0ecSDave Kleikamp } 750ac27a0ecSDave Kleikamp 751efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 752efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 753efbed4dcSTheodore Ts'o "EXT4-fs error") 754efbed4dcSTheodore Ts'o 75512062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 756014c9caaSJan Kara unsigned int line, bool force_ro, int error, __u64 block, 75754d3adbcSTheodore Ts'o const char *fmt, ...) 758ac27a0ecSDave Kleikamp { 7590ff2ea7dSJoe Perches struct va_format vaf; 760ac27a0ecSDave Kleikamp va_list args; 761ac27a0ecSDave Kleikamp 7620db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7630db1ff22STheodore Ts'o return; 7640db1ff22STheodore Ts'o 765ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 766efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 767ac27a0ecSDave Kleikamp va_start(args, fmt); 7680ff2ea7dSJoe Perches vaf.fmt = fmt; 7690ff2ea7dSJoe Perches vaf.va = &args; 770efbed4dcSTheodore Ts'o printk(KERN_CRIT 771efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 7720ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 773ac27a0ecSDave Kleikamp va_end(args); 774efbed4dcSTheodore Ts'o } 7759a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, error ? error : EFSCORRUPTED); 7769a089b21SGabriel Krisman Bertazi 777e789ca0cSJan Kara ext4_handle_error(sb, force_ro, error, 0, block, function, line); 778ac27a0ecSDave Kleikamp } 779ac27a0ecSDave Kleikamp 780e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 78154d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 782273df556SFrank Mayhar const char *fmt, ...) 783273df556SFrank Mayhar { 784273df556SFrank Mayhar va_list args; 785f7c21177STheodore Ts'o struct va_format vaf; 786273df556SFrank Mayhar 7870db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 7880db1ff22STheodore Ts'o return; 7890db1ff22STheodore Ts'o 790ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 791efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 792273df556SFrank Mayhar va_start(args, fmt); 793f7c21177STheodore Ts'o vaf.fmt = fmt; 794f7c21177STheodore Ts'o vaf.va = &args; 795c398eda0STheodore Ts'o if (block) 796d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 797d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 798d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 799d9ee81daSJoe Perches block, current->comm, &vaf); 800d9ee81daSJoe Perches else 801d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 802d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 803d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 804d9ee81daSJoe Perches current->comm, &vaf); 805273df556SFrank Mayhar va_end(args); 806efbed4dcSTheodore Ts'o } 8079a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, error ? error : EFSCORRUPTED); 8089a089b21SGabriel Krisman Bertazi 809e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, error, inode->i_ino, block, 81054d3adbcSTheodore Ts'o function, line); 811273df556SFrank Mayhar } 812273df556SFrank Mayhar 813e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 814f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 815f7c21177STheodore Ts'o const char *fmt, ...) 816273df556SFrank Mayhar { 817273df556SFrank Mayhar va_list args; 818f7c21177STheodore Ts'o struct va_format vaf; 819496ad9aaSAl Viro struct inode *inode = file_inode(file); 820273df556SFrank Mayhar char pathname[80], *path; 821273df556SFrank Mayhar 8220db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 8230db1ff22STheodore Ts'o return; 8240db1ff22STheodore Ts'o 825ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 826efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 8279bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 828f9a62d09SDan Carpenter if (IS_ERR(path)) 829273df556SFrank Mayhar path = "(unknown)"; 830f7c21177STheodore Ts'o va_start(args, fmt); 831f7c21177STheodore Ts'o vaf.fmt = fmt; 832f7c21177STheodore Ts'o vaf.va = &args; 833d9ee81daSJoe Perches if (block) 834d9ee81daSJoe Perches printk(KERN_CRIT 835d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 836d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 837d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 838d9ee81daSJoe Perches block, current->comm, path, &vaf); 839d9ee81daSJoe Perches else 840d9ee81daSJoe Perches printk(KERN_CRIT 841d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 842d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 843d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 844d9ee81daSJoe Perches current->comm, path, &vaf); 845273df556SFrank Mayhar va_end(args); 846efbed4dcSTheodore Ts'o } 8479a089b21SGabriel Krisman Bertazi fsnotify_sb_error(inode->i_sb, inode, EFSCORRUPTED); 8489a089b21SGabriel Krisman Bertazi 849e789ca0cSJan Kara ext4_handle_error(inode->i_sb, false, EFSCORRUPTED, inode->i_ino, block, 85054d3adbcSTheodore Ts'o function, line); 851273df556SFrank Mayhar } 852273df556SFrank Mayhar 853722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 854ac27a0ecSDave Kleikamp char nbuf[16]) 855ac27a0ecSDave Kleikamp { 856ac27a0ecSDave Kleikamp char *errstr = NULL; 857ac27a0ecSDave Kleikamp 858ac27a0ecSDave Kleikamp switch (errno) { 8596a797d27SDarrick J. Wong case -EFSCORRUPTED: 8606a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 8616a797d27SDarrick J. Wong break; 8626a797d27SDarrick J. Wong case -EFSBADCRC: 8636a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 8646a797d27SDarrick J. Wong break; 865ac27a0ecSDave Kleikamp case -EIO: 866ac27a0ecSDave Kleikamp errstr = "IO failure"; 867ac27a0ecSDave Kleikamp break; 868ac27a0ecSDave Kleikamp case -ENOMEM: 869ac27a0ecSDave Kleikamp errstr = "Out of memory"; 870ac27a0ecSDave Kleikamp break; 871ac27a0ecSDave Kleikamp case -EROFS: 87278f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 87378f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 874ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 875ac27a0ecSDave Kleikamp else 876ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 877ac27a0ecSDave Kleikamp break; 878ac27a0ecSDave Kleikamp default: 879ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 880ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 881ac27a0ecSDave Kleikamp * NULL. */ 882ac27a0ecSDave Kleikamp if (nbuf) { 883ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 884ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 885ac27a0ecSDave Kleikamp errstr = nbuf; 886ac27a0ecSDave Kleikamp } 887ac27a0ecSDave Kleikamp break; 888ac27a0ecSDave Kleikamp } 889ac27a0ecSDave Kleikamp 890ac27a0ecSDave Kleikamp return errstr; 891ac27a0ecSDave Kleikamp } 892ac27a0ecSDave Kleikamp 893617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 894ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 895ac27a0ecSDave Kleikamp 896c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 897c398eda0STheodore Ts'o unsigned int line, int errno) 898ac27a0ecSDave Kleikamp { 899ac27a0ecSDave Kleikamp char nbuf[16]; 900ac27a0ecSDave Kleikamp const char *errstr; 901ac27a0ecSDave Kleikamp 9020db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9030db1ff22STheodore Ts'o return; 9040db1ff22STheodore Ts'o 905ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 906ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 907ac27a0ecSDave Kleikamp * an error. */ 908bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 909ac27a0ecSDave Kleikamp return; 910ac27a0ecSDave Kleikamp 911efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 912617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 913c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 914c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 915efbed4dcSTheodore Ts'o } 9169a089b21SGabriel Krisman Bertazi fsnotify_sb_error(sb, NULL, errno ? errno : EFSCORRUPTED); 917ac27a0ecSDave Kleikamp 918e789ca0cSJan Kara ext4_handle_error(sb, false, -errno, 0, 0, function, line); 919ac27a0ecSDave Kleikamp } 920ac27a0ecSDave Kleikamp 921e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 922e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 923b31e1552SEric Sandeen { 9240ff2ea7dSJoe Perches struct va_format vaf; 925b31e1552SEric Sandeen va_list args; 926b31e1552SEric Sandeen 927da812f61SLukas Czerner if (sb) { 9281cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_msg_count); 929da812f61SLukas Czerner if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), 930da812f61SLukas Czerner "EXT4-fs")) 931efbed4dcSTheodore Ts'o return; 932da812f61SLukas Czerner } 933efbed4dcSTheodore Ts'o 934b31e1552SEric Sandeen va_start(args, fmt); 9350ff2ea7dSJoe Perches vaf.fmt = fmt; 9360ff2ea7dSJoe Perches vaf.va = &args; 937da812f61SLukas Czerner if (sb) 9380ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 939da812f61SLukas Czerner else 940da812f61SLukas Czerner printk("%sEXT4-fs: %pV\n", prefix, &vaf); 941b31e1552SEric Sandeen va_end(args); 942b31e1552SEric Sandeen } 943b31e1552SEric Sandeen 9441cf006edSDmitry Monakhov static int ext4_warning_ratelimit(struct super_block *sb) 9451cf006edSDmitry Monakhov { 9461cf006edSDmitry Monakhov atomic_inc(&EXT4_SB(sb)->s_warning_count); 9471cf006edSDmitry Monakhov return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 9481cf006edSDmitry Monakhov "EXT4-fs warning"); 9491cf006edSDmitry Monakhov } 950b03a2f7eSAndreas Dilger 95112062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 952c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 953ac27a0ecSDave Kleikamp { 9540ff2ea7dSJoe Perches struct va_format vaf; 955ac27a0ecSDave Kleikamp va_list args; 956ac27a0ecSDave Kleikamp 957b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 958efbed4dcSTheodore Ts'o return; 959efbed4dcSTheodore Ts'o 960ac27a0ecSDave Kleikamp va_start(args, fmt); 9610ff2ea7dSJoe Perches vaf.fmt = fmt; 9620ff2ea7dSJoe Perches vaf.va = &args; 9630ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 9640ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 965ac27a0ecSDave Kleikamp va_end(args); 966ac27a0ecSDave Kleikamp } 967ac27a0ecSDave Kleikamp 968b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 969b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 970b03a2f7eSAndreas Dilger { 971b03a2f7eSAndreas Dilger struct va_format vaf; 972b03a2f7eSAndreas Dilger va_list args; 973b03a2f7eSAndreas Dilger 974b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 975b03a2f7eSAndreas Dilger return; 976b03a2f7eSAndreas Dilger 977b03a2f7eSAndreas Dilger va_start(args, fmt); 978b03a2f7eSAndreas Dilger vaf.fmt = fmt; 979b03a2f7eSAndreas Dilger vaf.va = &args; 980b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 981b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 982b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 983b03a2f7eSAndreas Dilger va_end(args); 984b03a2f7eSAndreas Dilger } 985b03a2f7eSAndreas Dilger 986e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 987e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 988e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 989e29136f8STheodore Ts'o const char *fmt, ...) 9905d1b1b3fSAneesh Kumar K.V __releases(bitlock) 9915d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 9925d1b1b3fSAneesh Kumar K.V { 9930ff2ea7dSJoe Perches struct va_format vaf; 9945d1b1b3fSAneesh Kumar K.V va_list args; 9955d1b1b3fSAneesh Kumar K.V 9960db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 9970db1ff22STheodore Ts'o return; 9980db1ff22STheodore Ts'o 999ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 1000efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 10015d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 10020ff2ea7dSJoe Perches vaf.fmt = fmt; 10030ff2ea7dSJoe Perches vaf.va = &args; 100421149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 1005e29136f8STheodore Ts'o sb->s_id, function, line, grp); 1006e29136f8STheodore Ts'o if (ino) 10070ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 1008e29136f8STheodore Ts'o if (block) 1009efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 1010efbed4dcSTheodore Ts'o (unsigned long long) block); 10110ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 10125d1b1b3fSAneesh Kumar K.V va_end(args); 1013efbed4dcSTheodore Ts'o } 10145d1b1b3fSAneesh Kumar K.V 1015c92dc856SJan Kara if (test_opt(sb, ERRORS_CONT)) { 1016327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 1017327eaf73STheodore Ts'o WARN_ON_ONCE(1); 1018e789ca0cSJan Kara EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 10192d01ddc8SJan Kara if (!bdev_read_only(sb->s_bdev)) { 10202d01ddc8SJan Kara save_error_info(sb, EFSCORRUPTED, ino, block, function, 10212d01ddc8SJan Kara line); 1022c92dc856SJan Kara schedule_work(&EXT4_SB(sb)->s_error_work); 10232d01ddc8SJan Kara } 10245d1b1b3fSAneesh Kumar K.V return; 10255d1b1b3fSAneesh Kumar K.V } 10265d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 1027e789ca0cSJan Kara ext4_handle_error(sb, false, EFSCORRUPTED, ino, block, function, line); 10285d1b1b3fSAneesh Kumar K.V /* 10295d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 10305d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 10315d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 10325d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 10335d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 103425985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 10355d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 10365d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 10375d1b1b3fSAneesh Kumar K.V * more appropriate error code. 10385d1b1b3fSAneesh Kumar K.V */ 10395d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 10405d1b1b3fSAneesh Kumar K.V return; 10415d1b1b3fSAneesh Kumar K.V } 10425d1b1b3fSAneesh Kumar K.V 1043db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 1044db79e6d1SWang Shilong ext4_group_t group, 1045db79e6d1SWang Shilong unsigned int flags) 1046db79e6d1SWang Shilong { 1047db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 1048db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 1049db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 10509af0b3d1SWang Shilong int ret; 1051db79e6d1SWang Shilong 10529af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 10539af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 10549af0b3d1SWang Shilong &grp->bb_state); 10559af0b3d1SWang Shilong if (!ret) 1056db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 1057db79e6d1SWang Shilong grp->bb_free); 1058db79e6d1SWang Shilong } 1059db79e6d1SWang Shilong 10609af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 10619af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 10629af0b3d1SWang Shilong &grp->bb_state); 10639af0b3d1SWang Shilong if (!ret && gdp) { 1064db79e6d1SWang Shilong int count; 1065db79e6d1SWang Shilong 1066db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 1067db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 1068db79e6d1SWang Shilong count); 1069db79e6d1SWang Shilong } 1070db79e6d1SWang Shilong } 1071db79e6d1SWang Shilong } 1072db79e6d1SWang Shilong 1073617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 1074ac27a0ecSDave Kleikamp { 1075617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 1076ac27a0ecSDave Kleikamp 1077617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 1078ac27a0ecSDave Kleikamp return; 1079ac27a0ecSDave Kleikamp 108012062dddSEric Sandeen ext4_warning(sb, 1081ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 1082ac27a0ecSDave Kleikamp "running e2fsck is recommended", 1083617ba13bSMingming Cao EXT4_DYNAMIC_REV); 1084ac27a0ecSDave Kleikamp 1085617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 1086617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 1087617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 1088ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 1089ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 1090ac27a0ecSDave Kleikamp 1091ac27a0ecSDave Kleikamp /* 1092ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 1093ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 1094ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 1095ac27a0ecSDave Kleikamp */ 1096ac27a0ecSDave Kleikamp } 1097ac27a0ecSDave Kleikamp 1098ac27a0ecSDave Kleikamp /* 1099ac27a0ecSDave Kleikamp * Open the external journal device 1100ac27a0ecSDave Kleikamp */ 1101b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 1102ac27a0ecSDave Kleikamp { 1103ac27a0ecSDave Kleikamp struct block_device *bdev; 1104ac27a0ecSDave Kleikamp 1105d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 1106ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 1107ac27a0ecSDave Kleikamp goto fail; 1108ac27a0ecSDave Kleikamp return bdev; 1109ac27a0ecSDave Kleikamp 1110ac27a0ecSDave Kleikamp fail: 1111ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 1112ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 1113ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 1114ac27a0ecSDave Kleikamp return NULL; 1115ac27a0ecSDave Kleikamp } 1116ac27a0ecSDave Kleikamp 1117ac27a0ecSDave Kleikamp /* 1118ac27a0ecSDave Kleikamp * Release the journal device 1119ac27a0ecSDave Kleikamp */ 11204385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 1121ac27a0ecSDave Kleikamp { 11224385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 1123ac27a0ecSDave Kleikamp } 1124ac27a0ecSDave Kleikamp 11254385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 1126ac27a0ecSDave Kleikamp { 1127ac27a0ecSDave Kleikamp struct block_device *bdev; 1128ee7ed3aaSChunguang Xu bdev = sbi->s_journal_bdev; 1129ac27a0ecSDave Kleikamp if (bdev) { 11304385bab1SAl Viro ext4_blkdev_put(bdev); 1131ee7ed3aaSChunguang Xu sbi->s_journal_bdev = NULL; 1132ac27a0ecSDave Kleikamp } 1133ac27a0ecSDave Kleikamp } 1134ac27a0ecSDave Kleikamp 1135ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 1136ac27a0ecSDave Kleikamp { 1137617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 1138ac27a0ecSDave Kleikamp } 1139ac27a0ecSDave Kleikamp 1140617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 1141ac27a0ecSDave Kleikamp { 1142ac27a0ecSDave Kleikamp struct list_head *l; 1143ac27a0ecSDave Kleikamp 1144b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 1145ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 1146ac27a0ecSDave Kleikamp 1147ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 1148ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 1149ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 1150ac27a0ecSDave Kleikamp printk(KERN_ERR " " 1151ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 1152ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 1153ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 1154ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 1155ac27a0ecSDave Kleikamp } 1156ac27a0ecSDave Kleikamp } 1157ac27a0ecSDave Kleikamp 1158957153fcSJan Kara #ifdef CONFIG_QUOTA 1159957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 1160957153fcSJan Kara 1161957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1162957153fcSJan Kara { 1163957153fcSJan Kara int type; 1164957153fcSJan Kara 1165957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 1166957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 1167957153fcSJan Kara ext4_quota_off(sb, type); 1168957153fcSJan Kara } 116933458eabSTheodore Ts'o 117033458eabSTheodore Ts'o /* 117133458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 117233458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 117333458eabSTheodore Ts'o */ 117433458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 117533458eabSTheodore Ts'o struct ext4_sb_info *sbi, 117633458eabSTheodore Ts'o int type) 117733458eabSTheodore Ts'o { 117833458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 117933458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 118033458eabSTheodore Ts'o } 1181957153fcSJan Kara #else 1182957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 1183957153fcSJan Kara { 1184957153fcSJan Kara } 1185957153fcSJan Kara #endif 1186957153fcSJan Kara 1187617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 1188ac27a0ecSDave Kleikamp { 1189617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1190617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 11911d0c3924STheodore Ts'o struct buffer_head **group_desc; 11927c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 119397abd7d4STheodore Ts'o int aborted = 0; 1194ef2cabf7SHidehiro Kawai int i, err; 1195ac27a0ecSDave Kleikamp 1196b98535d0SYe Bin /* 1197b98535d0SYe Bin * Unregister sysfs before destroying jbd2 journal. 1198b98535d0SYe Bin * Since we could still access attr_journal_task attribute via sysfs 1199b98535d0SYe Bin * path which could have sbi->s_journal->j_task as NULL 1200b98535d0SYe Bin * Unregister sysfs before flush sbi->s_error_work. 1201b98535d0SYe Bin * Since user may read /proc/fs/ext4/xx/mb_groups during umount, If 1202b98535d0SYe Bin * read metadata verify failed then will queue error work. 1203b98535d0SYe Bin * flush_stashed_error_work will call start_this_handle may trigger 1204b98535d0SYe Bin * BUG_ON. 1205b98535d0SYe Bin */ 1206b98535d0SYe Bin ext4_unregister_sysfs(sb); 1207b98535d0SYe Bin 12084808cb5bSZhang Yi if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs unmount")) 12094808cb5bSZhang Yi ext4_msg(sb, KERN_INFO, "unmounting filesystem."); 12104808cb5bSZhang Yi 1211857ac889SLukas Czerner ext4_unregister_li_request(sb); 1212957153fcSJan Kara ext4_quota_off_umount(sb); 1213e0ccfd95SChristoph Hellwig 1214c92dc856SJan Kara flush_work(&sbi->s_error_work); 12152e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 121602f310fcSJan Kara ext4_release_orphan_info(sb); 12174c0425ffSMingming Cao 12180390131bSFrank Mayhar if (sbi->s_journal) { 121997abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1220ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 122147b4a50bSJan Kara sbi->s_journal = NULL; 1222878520acSTheodore Ts'o if ((err < 0) && !aborted) { 122354d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 12240390131bSFrank Mayhar } 1225878520acSTheodore Ts'o } 1226d4edac31SJosef Bacik 1227d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 12289105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1229d4edac31SJosef Bacik ext4_release_system_zone(sb); 1230d4edac31SJosef Bacik ext4_mb_release(sb); 1231d4edac31SJosef Bacik ext4_ext_release(sb); 1232d4edac31SJosef Bacik 1233bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1234e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 123502f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 1236ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1237ac27a0ecSDave Kleikamp } 1238bc98a42cSDavid Howells if (!sb_rdonly(sb)) 12394392fbc4SJan Kara ext4_commit_super(sb); 1240a8e25a83SArtem Bityutskiy 12411d0c3924STheodore Ts'o rcu_read_lock(); 12421d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1243ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 12441d0c3924STheodore Ts'o brelse(group_desc[i]); 12451d0c3924STheodore Ts'o kvfree(group_desc); 12467c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 12477c990728SSuraj Jitindar Singh if (flex_groups) { 12487c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 12497c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 12507c990728SSuraj Jitindar Singh kvfree(flex_groups); 12517c990728SSuraj Jitindar Singh } 12521d0c3924STheodore Ts'o rcu_read_unlock(); 125357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1254ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1255ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 125657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1257efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 1258bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1259ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1260a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 126133458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1262ac27a0ecSDave Kleikamp #endif 1263ac27a0ecSDave Kleikamp 1264ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1265ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1266ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1267ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1268ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1269ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1270837c23fbSChunguang Xu ASSERT(list_empty(&sbi->s_orphan)); 1271ac27a0ecSDave Kleikamp 127289d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1273f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1274ee7ed3aaSChunguang Xu if (sbi->s_journal_bdev && sbi->s_journal_bdev != sb->s_bdev) { 1275ac27a0ecSDave Kleikamp /* 1276ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1277ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1278ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1279ac27a0ecSDave Kleikamp */ 1280ee7ed3aaSChunguang Xu sync_blockdev(sbi->s_journal_bdev); 1281ee7ed3aaSChunguang Xu invalidate_bdev(sbi->s_journal_bdev); 1282617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1283ac27a0ecSDave Kleikamp } 128450c15df6SChengguang Xu 1285dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1286dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 128750c15df6SChengguang Xu 128847387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 128947387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 129050c15df6SChengguang Xu 1291618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 1292618f0031SPavel Skripkin 12939060dd2cSEric Sandeen brelse(sbi->s_sbh); 1294ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 12953197ebdbSTheodore Ts'o /* 12963197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 12973197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 12983197ebdbSTheodore Ts'o */ 12993197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 13003197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 13010441984aSDarrick J. Wong if (sbi->s_chksum_driver) 13020441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1303705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 13048012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 1305ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 13065298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1307f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 1308c83ad55eSGabriel Krisman Bertazi #endif 1309ac27a0ecSDave Kleikamp kfree(sbi); 1310ac27a0ecSDave Kleikamp } 1311ac27a0ecSDave Kleikamp 1312e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1313ac27a0ecSDave Kleikamp 1314ac27a0ecSDave Kleikamp /* 1315ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1316ac27a0ecSDave Kleikamp */ 1317617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1318ac27a0ecSDave Kleikamp { 1319617ba13bSMingming Cao struct ext4_inode_info *ei; 1320ac27a0ecSDave Kleikamp 1321fd60b288SMuchun Song ei = alloc_inode_sb(sb, ext4_inode_cachep, GFP_NOFS); 1322ac27a0ecSDave Kleikamp if (!ei) 1323ac27a0ecSDave Kleikamp return NULL; 13240b8e58a1SAndreas Dilger 1325ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1326202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1327c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 132827bc446eSbrookxu atomic_set(&ei->i_prealloc_active, 0); 1329c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 13309a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 13319a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1332edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1333eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1334edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1335dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1336d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1337d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 13381dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1339a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1340a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 134196c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1342a9e7f447SDmitry Monakhov #endif 13438aefcd55STheodore Ts'o ei->jinode = NULL; 13442e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1345744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1346b436b9beSJan Kara ei->i_sync_tid = 0; 1347b436b9beSJan Kara ei->i_datasync_tid = 0; 1348e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 13492e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1350aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1351aa75f4d3SHarshad Shirwadkar mutex_init(&ei->i_fc_lock); 1352ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1353ac27a0ecSDave Kleikamp } 1354ac27a0ecSDave Kleikamp 13557ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 13567ff9c073STheodore Ts'o { 13577ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 13587ff9c073STheodore Ts'o 135929b3692eSEric Biggers if (!drop) 136029b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 136129b3692eSEric Biggers 13627ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 13637ff9c073STheodore Ts'o return drop; 13647ff9c073STheodore Ts'o } 13657ff9c073STheodore Ts'o 136694053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1367fa0d7e3dSNick Piggin { 13682c58d548SEric Biggers fscrypt_free_inode(inode); 1369aa75f4d3SHarshad Shirwadkar if (!list_empty(&(EXT4_I(inode)->i_fc_list))) { 1370aa75f4d3SHarshad Shirwadkar pr_warn("%s: inode %ld still in fc list", 1371aa75f4d3SHarshad Shirwadkar __func__, inode->i_ino); 1372aa75f4d3SHarshad Shirwadkar } 1373fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1374fa0d7e3dSNick Piggin } 1375fa0d7e3dSNick Piggin 1376617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1377ac27a0ecSDave Kleikamp { 13789f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1379b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1380b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1381b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 13829f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 13839f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 13849f7dd93dSVasily Averin true); 13859f7dd93dSVasily Averin dump_stack(); 13869f7dd93dSVasily Averin } 13876fed8395SJeffle Xu 13886fed8395SJeffle Xu if (EXT4_I(inode)->i_reserved_data_blocks) 13896fed8395SJeffle Xu ext4_msg(inode->i_sb, KERN_ERR, 13906fed8395SJeffle Xu "Inode %lu (%p): i_reserved_data_blocks (%u) not cleared!", 13916fed8395SJeffle Xu inode->i_ino, EXT4_I(inode), 13926fed8395SJeffle Xu EXT4_I(inode)->i_reserved_data_blocks); 1393ac27a0ecSDave Kleikamp } 1394ac27a0ecSDave Kleikamp 139551cc5068SAlexey Dobriyan static void init_once(void *foo) 1396ac27a0ecSDave Kleikamp { 1397c30365b9SYu Zhe struct ext4_inode_info *ei = foo; 1398ac27a0ecSDave Kleikamp 1399ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1400ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 14010e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1402ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1403aa75f4d3SHarshad Shirwadkar ext4_fc_init_inode(&ei->vfs_inode); 1404ac27a0ecSDave Kleikamp } 1405ac27a0ecSDave Kleikamp 1406e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1407ac27a0ecSDave Kleikamp { 1408f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1409f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1410f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1411f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1412f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1413f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 141420c2df83SPaul Mundt init_once); 1415617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1416ac27a0ecSDave Kleikamp return -ENOMEM; 1417ac27a0ecSDave Kleikamp return 0; 1418ac27a0ecSDave Kleikamp } 1419ac27a0ecSDave Kleikamp 1420ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1421ac27a0ecSDave Kleikamp { 14228c0a8537SKirill A. Shutemov /* 14238c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 14248c0a8537SKirill A. Shutemov * destroy cache. 14258c0a8537SKirill A. Shutemov */ 14268c0a8537SKirill A. Shutemov rcu_barrier(); 1427617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1428ac27a0ecSDave Kleikamp } 1429ac27a0ecSDave Kleikamp 14300930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1431ac27a0ecSDave Kleikamp { 1432aa75f4d3SHarshad Shirwadkar ext4_fc_del(inode); 14330930fcc1SAl Viro invalidate_inode_buffers(inode); 1434dbd5768fSJan Kara clear_inode(inode); 143527bc446eSbrookxu ext4_discard_preallocations(inode, 0); 143651865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1437f4c2d372SJan Kara dquot_drop(inode); 14388aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 14398aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 14408aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 14418aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 14428aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 14438aefcd55STheodore Ts'o } 14443d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1445c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1446ac27a0ecSDave Kleikamp } 1447ac27a0ecSDave Kleikamp 14481b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 14491b961ac0SChristoph Hellwig u64 ino, u32 generation) 1450ac27a0ecSDave Kleikamp { 1451ac27a0ecSDave Kleikamp struct inode *inode; 1452ac27a0ecSDave Kleikamp 14538a363970STheodore Ts'o /* 1454ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1455ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1456ac27a0ecSDave Kleikamp */ 14578a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 14581d1fe1eeSDavid Howells if (IS_ERR(inode)) 14591d1fe1eeSDavid Howells return ERR_CAST(inode); 14601d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1461ac27a0ecSDave Kleikamp iput(inode); 1462ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1463ac27a0ecSDave Kleikamp } 14641b961ac0SChristoph Hellwig 14651b961ac0SChristoph Hellwig return inode; 1466ac27a0ecSDave Kleikamp } 14671b961ac0SChristoph Hellwig 14681b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 14691b961ac0SChristoph Hellwig int fh_len, int fh_type) 14701b961ac0SChristoph Hellwig { 14711b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 14721b961ac0SChristoph Hellwig ext4_nfs_get_inode); 14731b961ac0SChristoph Hellwig } 14741b961ac0SChristoph Hellwig 14751b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 14761b961ac0SChristoph Hellwig int fh_len, int fh_type) 14771b961ac0SChristoph Hellwig { 14781b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 14791b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1480ac27a0ecSDave Kleikamp } 1481ac27a0ecSDave Kleikamp 1482fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1483fde87268STheodore Ts'o { 1484fde87268STheodore Ts'o struct writeback_control wbc = { 1485fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1486fde87268STheodore Ts'o }; 1487fde87268STheodore Ts'o 1488fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1489fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1490fde87268STheodore Ts'o } 1491fde87268STheodore Ts'o 1492ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1493d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1494689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1495ac27a0ecSDave Kleikamp 1496617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1497617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1498617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1499617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1500617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 15016f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 15028c54ca9cSAl Viro const struct path *path); 1503617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1504ac27a0ecSDave Kleikamp size_t len, loff_t off); 1505617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1506ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 15077c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 15087c319d32SAditya Kali unsigned int flags); 1509ac27a0ecSDave Kleikamp 151096c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 151196c7e0d9SJan Kara { 151296c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 151396c7e0d9SJan Kara } 151496c7e0d9SJan Kara 151561e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 151660e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1517617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1518617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1519617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1520617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1521a5b5ee32SJan Kara .write_info = ext4_write_info, 1522a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1523a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1524040cb378SLi Xi .get_projid = ext4_get_projid, 15257a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1526ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1527ac27a0ecSDave Kleikamp }; 1528ac27a0ecSDave Kleikamp 15290d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1530617ba13bSMingming Cao .quota_on = ext4_quota_on, 1531ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1532287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 15330a240339SJan Kara .get_state = dquot_get_state, 1534287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1535287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 15366332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 15376332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1538ac27a0ecSDave Kleikamp }; 1539ac27a0ecSDave Kleikamp #endif 1540ac27a0ecSDave Kleikamp 1541ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1542617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 154394053139SAl Viro .free_inode = ext4_free_in_core_inode, 1544617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1545617ba13bSMingming Cao .write_inode = ext4_write_inode, 1546617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 15477ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 15480930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1549617ba13bSMingming Cao .put_super = ext4_put_super, 1550617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1551c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1552c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1553617ba13bSMingming Cao .statfs = ext4_statfs, 1554617ba13bSMingming Cao .show_options = ext4_show_options, 1555ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1556617ba13bSMingming Cao .quota_read = ext4_quota_read, 1557617ba13bSMingming Cao .quota_write = ext4_quota_write, 155896c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1559ac27a0ecSDave Kleikamp #endif 1560ac27a0ecSDave Kleikamp }; 1561ac27a0ecSDave Kleikamp 156239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 15631b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 15641b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1565617ba13bSMingming Cao .get_parent = ext4_get_parent, 1566fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1567ac27a0ecSDave Kleikamp }; 1568ac27a0ecSDave Kleikamp 1569ac27a0ecSDave Kleikamp enum { 1570ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1571ba2e524dSLukas Czerner Opt_resgid, Opt_resuid, Opt_sb, 157272578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 15732d544ec9SYang Xu Opt_user_xattr, Opt_acl, 157472578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1575ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1576ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1577ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 15786ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 15794f74d15fSEric Biggers Opt_inlinecrypt, 1580ba2e524dSLukas Czerner Opt_usrjquota, Opt_grpjquota, Opt_quota, 1581ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 15821ff20307SJeff Layton Opt_usrquota, Opt_grpquota, Opt_prjquota, 15839cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1584327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 15854437992bSLukas Czerner Opt_nowarn_on_error, Opt_mblk_io_submit, Opt_debug_want_extra_isize, 15861449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 15875328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1588744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1589fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1590cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 159121175ca4SHarshad Shirwadkar Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, 1592e5a185c2SLukas Czerner Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, 15938016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 159499c880deSHarshad Shirwadkar Opt_fc_debug_max_replay, Opt_fc_debug_force 15958016e29fSHarshad Shirwadkar #endif 1596ac27a0ecSDave Kleikamp }; 1597ac27a0ecSDave Kleikamp 1598e5a185c2SLukas Czerner static const struct constant_table ext4_param_errors[] = { 1599ba2e524dSLukas Czerner {"continue", EXT4_MOUNT_ERRORS_CONT}, 1600ba2e524dSLukas Czerner {"panic", EXT4_MOUNT_ERRORS_PANIC}, 1601ba2e524dSLukas Czerner {"remount-ro", EXT4_MOUNT_ERRORS_RO}, 1602e5a185c2SLukas Czerner {} 1603e5a185c2SLukas Czerner }; 1604e5a185c2SLukas Czerner 1605e5a185c2SLukas Czerner static const struct constant_table ext4_param_data[] = { 1606ba2e524dSLukas Czerner {"journal", EXT4_MOUNT_JOURNAL_DATA}, 1607ba2e524dSLukas Czerner {"ordered", EXT4_MOUNT_ORDERED_DATA}, 1608ba2e524dSLukas Czerner {"writeback", EXT4_MOUNT_WRITEBACK_DATA}, 1609e5a185c2SLukas Czerner {} 1610e5a185c2SLukas Czerner }; 1611e5a185c2SLukas Czerner 1612e5a185c2SLukas Czerner static const struct constant_table ext4_param_data_err[] = { 1613e5a185c2SLukas Czerner {"abort", Opt_data_err_abort}, 1614e5a185c2SLukas Czerner {"ignore", Opt_data_err_ignore}, 1615e5a185c2SLukas Czerner {} 1616e5a185c2SLukas Czerner }; 1617e5a185c2SLukas Czerner 1618e5a185c2SLukas Czerner static const struct constant_table ext4_param_jqfmt[] = { 1619ba2e524dSLukas Czerner {"vfsold", QFMT_VFS_OLD}, 1620ba2e524dSLukas Czerner {"vfsv0", QFMT_VFS_V0}, 1621ba2e524dSLukas Czerner {"vfsv1", QFMT_VFS_V1}, 1622e5a185c2SLukas Czerner {} 1623e5a185c2SLukas Czerner }; 1624e5a185c2SLukas Czerner 1625e5a185c2SLukas Czerner static const struct constant_table ext4_param_dax[] = { 1626e5a185c2SLukas Czerner {"always", Opt_dax_always}, 1627e5a185c2SLukas Czerner {"inode", Opt_dax_inode}, 1628e5a185c2SLukas Czerner {"never", Opt_dax_never}, 1629e5a185c2SLukas Czerner {} 1630e5a185c2SLukas Czerner }; 1631e5a185c2SLukas Czerner 1632e5a185c2SLukas Czerner /* String parameter that allows empty argument */ 1633e5a185c2SLukas Czerner #define fsparam_string_empty(NAME, OPT) \ 1634e5a185c2SLukas Czerner __fsparam(fs_param_is_string, NAME, OPT, fs_param_can_be_empty, NULL) 1635e5a185c2SLukas Czerner 1636e5a185c2SLukas Czerner /* 1637e5a185c2SLukas Czerner * Mount option specification 1638e5a185c2SLukas Czerner * We don't use fsparam_flag_no because of the way we set the 1639e5a185c2SLukas Czerner * options and the way we show them in _ext4_show_options(). To 1640e5a185c2SLukas Czerner * keep the changes to a minimum, let's keep the negative options 1641e5a185c2SLukas Czerner * separate for now. 1642e5a185c2SLukas Czerner */ 1643e5a185c2SLukas Czerner static const struct fs_parameter_spec ext4_param_specs[] = { 1644e5a185c2SLukas Czerner fsparam_flag ("bsddf", Opt_bsd_df), 1645e5a185c2SLukas Czerner fsparam_flag ("minixdf", Opt_minix_df), 1646e5a185c2SLukas Czerner fsparam_flag ("grpid", Opt_grpid), 1647e5a185c2SLukas Czerner fsparam_flag ("bsdgroups", Opt_grpid), 1648e5a185c2SLukas Czerner fsparam_flag ("nogrpid", Opt_nogrpid), 1649e5a185c2SLukas Czerner fsparam_flag ("sysvgroups", Opt_nogrpid), 1650e5a185c2SLukas Czerner fsparam_u32 ("resgid", Opt_resgid), 1651e5a185c2SLukas Czerner fsparam_u32 ("resuid", Opt_resuid), 1652e5a185c2SLukas Czerner fsparam_u32 ("sb", Opt_sb), 1653e5a185c2SLukas Czerner fsparam_enum ("errors", Opt_errors, ext4_param_errors), 1654e5a185c2SLukas Czerner fsparam_flag ("nouid32", Opt_nouid32), 1655e5a185c2SLukas Czerner fsparam_flag ("debug", Opt_debug), 1656e5a185c2SLukas Czerner fsparam_flag ("oldalloc", Opt_removed), 1657e5a185c2SLukas Czerner fsparam_flag ("orlov", Opt_removed), 1658e5a185c2SLukas Czerner fsparam_flag ("user_xattr", Opt_user_xattr), 1659e5a185c2SLukas Czerner fsparam_flag ("acl", Opt_acl), 1660e5a185c2SLukas Czerner fsparam_flag ("norecovery", Opt_noload), 1661e5a185c2SLukas Czerner fsparam_flag ("noload", Opt_noload), 1662e5a185c2SLukas Czerner fsparam_flag ("bh", Opt_removed), 1663e5a185c2SLukas Czerner fsparam_flag ("nobh", Opt_removed), 1664e5a185c2SLukas Czerner fsparam_u32 ("commit", Opt_commit), 1665e5a185c2SLukas Czerner fsparam_u32 ("min_batch_time", Opt_min_batch_time), 1666e5a185c2SLukas Czerner fsparam_u32 ("max_batch_time", Opt_max_batch_time), 1667e5a185c2SLukas Czerner fsparam_u32 ("journal_dev", Opt_journal_dev), 1668e5a185c2SLukas Czerner fsparam_bdev ("journal_path", Opt_journal_path), 1669e5a185c2SLukas Czerner fsparam_flag ("journal_checksum", Opt_journal_checksum), 1670e5a185c2SLukas Czerner fsparam_flag ("nojournal_checksum", Opt_nojournal_checksum), 1671e5a185c2SLukas Czerner fsparam_flag ("journal_async_commit",Opt_journal_async_commit), 1672e5a185c2SLukas Czerner fsparam_flag ("abort", Opt_abort), 1673e5a185c2SLukas Czerner fsparam_enum ("data", Opt_data, ext4_param_data), 1674e5a185c2SLukas Czerner fsparam_enum ("data_err", Opt_data_err, 1675e5a185c2SLukas Czerner ext4_param_data_err), 1676e5a185c2SLukas Czerner fsparam_string_empty 1677e5a185c2SLukas Czerner ("usrjquota", Opt_usrjquota), 1678e5a185c2SLukas Czerner fsparam_string_empty 1679e5a185c2SLukas Czerner ("grpjquota", Opt_grpjquota), 1680e5a185c2SLukas Czerner fsparam_enum ("jqfmt", Opt_jqfmt, ext4_param_jqfmt), 1681e5a185c2SLukas Czerner fsparam_flag ("grpquota", Opt_grpquota), 1682e5a185c2SLukas Czerner fsparam_flag ("quota", Opt_quota), 1683e5a185c2SLukas Czerner fsparam_flag ("noquota", Opt_noquota), 1684e5a185c2SLukas Czerner fsparam_flag ("usrquota", Opt_usrquota), 1685e5a185c2SLukas Czerner fsparam_flag ("prjquota", Opt_prjquota), 1686e5a185c2SLukas Czerner fsparam_flag ("barrier", Opt_barrier), 1687e5a185c2SLukas Czerner fsparam_u32 ("barrier", Opt_barrier), 1688e5a185c2SLukas Czerner fsparam_flag ("nobarrier", Opt_nobarrier), 16891ff20307SJeff Layton fsparam_flag ("i_version", Opt_removed), 1690e5a185c2SLukas Czerner fsparam_flag ("dax", Opt_dax), 1691e5a185c2SLukas Czerner fsparam_enum ("dax", Opt_dax_type, ext4_param_dax), 1692e5a185c2SLukas Czerner fsparam_u32 ("stripe", Opt_stripe), 1693e5a185c2SLukas Czerner fsparam_flag ("delalloc", Opt_delalloc), 1694e5a185c2SLukas Czerner fsparam_flag ("nodelalloc", Opt_nodelalloc), 1695e5a185c2SLukas Czerner fsparam_flag ("warn_on_error", Opt_warn_on_error), 1696e5a185c2SLukas Czerner fsparam_flag ("nowarn_on_error", Opt_nowarn_on_error), 1697e5a185c2SLukas Czerner fsparam_u32 ("debug_want_extra_isize", 1698e5a185c2SLukas Czerner Opt_debug_want_extra_isize), 1699e5a185c2SLukas Czerner fsparam_flag ("mblk_io_submit", Opt_removed), 1700e5a185c2SLukas Czerner fsparam_flag ("nomblk_io_submit", Opt_removed), 1701e5a185c2SLukas Czerner fsparam_flag ("block_validity", Opt_block_validity), 1702e5a185c2SLukas Czerner fsparam_flag ("noblock_validity", Opt_noblock_validity), 1703e5a185c2SLukas Czerner fsparam_u32 ("inode_readahead_blks", 1704e5a185c2SLukas Czerner Opt_inode_readahead_blks), 1705e5a185c2SLukas Czerner fsparam_u32 ("journal_ioprio", Opt_journal_ioprio), 1706e5a185c2SLukas Czerner fsparam_u32 ("auto_da_alloc", Opt_auto_da_alloc), 1707e5a185c2SLukas Czerner fsparam_flag ("auto_da_alloc", Opt_auto_da_alloc), 1708e5a185c2SLukas Czerner fsparam_flag ("noauto_da_alloc", Opt_noauto_da_alloc), 1709e5a185c2SLukas Czerner fsparam_flag ("dioread_nolock", Opt_dioread_nolock), 1710e5a185c2SLukas Czerner fsparam_flag ("nodioread_nolock", Opt_dioread_lock), 1711e5a185c2SLukas Czerner fsparam_flag ("dioread_lock", Opt_dioread_lock), 1712e5a185c2SLukas Czerner fsparam_flag ("discard", Opt_discard), 1713e5a185c2SLukas Czerner fsparam_flag ("nodiscard", Opt_nodiscard), 1714e5a185c2SLukas Czerner fsparam_u32 ("init_itable", Opt_init_itable), 1715e5a185c2SLukas Czerner fsparam_flag ("init_itable", Opt_init_itable), 1716e5a185c2SLukas Czerner fsparam_flag ("noinit_itable", Opt_noinit_itable), 1717e5a185c2SLukas Czerner #ifdef CONFIG_EXT4_DEBUG 1718e5a185c2SLukas Czerner fsparam_flag ("fc_debug_force", Opt_fc_debug_force), 1719e5a185c2SLukas Czerner fsparam_u32 ("fc_debug_max_replay", Opt_fc_debug_max_replay), 1720e5a185c2SLukas Czerner #endif 1721e5a185c2SLukas Czerner fsparam_u32 ("max_dir_size_kb", Opt_max_dir_size_kb), 1722e5a185c2SLukas Czerner fsparam_flag ("test_dummy_encryption", 1723e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1724e5a185c2SLukas Czerner fsparam_string ("test_dummy_encryption", 1725e5a185c2SLukas Czerner Opt_test_dummy_encryption), 1726e5a185c2SLukas Czerner fsparam_flag ("inlinecrypt", Opt_inlinecrypt), 1727e5a185c2SLukas Czerner fsparam_flag ("nombcache", Opt_nombcache), 1728e5a185c2SLukas Czerner fsparam_flag ("no_mbcache", Opt_nombcache), /* for backward compatibility */ 1729e5a185c2SLukas Czerner fsparam_flag ("prefetch_block_bitmaps", 1730e5a185c2SLukas Czerner Opt_removed), 1731e5a185c2SLukas Czerner fsparam_flag ("no_prefetch_block_bitmaps", 1732e5a185c2SLukas Czerner Opt_no_prefetch_block_bitmaps), 1733e5a185c2SLukas Czerner fsparam_s32 ("mb_optimize_scan", Opt_mb_optimize_scan), 1734e5a185c2SLukas Czerner fsparam_string ("check", Opt_removed), /* mount option from ext2/3 */ 1735e5a185c2SLukas Czerner fsparam_flag ("nocheck", Opt_removed), /* mount option from ext2/3 */ 1736e5a185c2SLukas Czerner fsparam_flag ("reservation", Opt_removed), /* mount option from ext2/3 */ 1737e5a185c2SLukas Czerner fsparam_flag ("noreservation", Opt_removed), /* mount option from ext2/3 */ 1738e5a185c2SLukas Czerner fsparam_u32 ("journal", Opt_removed), /* mount option from ext2/3 */ 1739e5a185c2SLukas Czerner {} 1740e5a185c2SLukas Czerner }; 1741e5a185c2SLukas Czerner 1742b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1743196e402aSHarshad Shirwadkar 1744d6006186SEric Biggers static const char deprecated_msg[] = 1745d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1746437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1747b3881f74STheodore Ts'o 174826092bf5STheodore Ts'o #define MOPT_SET 0x0001 174926092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 175026092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 175126092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 175226092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 175326092bf5STheodore Ts'o #define MOPT_Q 0 1754ba2e524dSLukas Czerner #define MOPT_QFMT 0x0010 175526092bf5STheodore Ts'o #else 175626092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 175726092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 175826092bf5STheodore Ts'o #endif 1759ba2e524dSLukas Czerner #define MOPT_NO_EXT2 0x0020 1760ba2e524dSLukas Czerner #define MOPT_NO_EXT3 0x0040 17618dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1762ba2e524dSLukas Czerner #define MOPT_SKIP 0x0080 1763ba2e524dSLukas Czerner #define MOPT_2 0x0100 176426092bf5STheodore Ts'o 176526092bf5STheodore Ts'o static const struct mount_opts { 176626092bf5STheodore Ts'o int token; 176726092bf5STheodore Ts'o int mount_opt; 176826092bf5STheodore Ts'o int flags; 176926092bf5STheodore Ts'o } ext4_mount_opts[] = { 177026092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 177126092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 177226092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 177326092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 177426092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 177526092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 17768dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 17778dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 17788dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 17798dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 178026092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 178126092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 17828dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 17838dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 17848dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 178559d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1786327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1787327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1788cb8435dcSEric Biggers {Opt_commit, 0, MOPT_NO_EXT2}, 1789c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1790c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 17918dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 17921e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 179326092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 17948dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 17951e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 17968dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 1797ba2e524dSLukas Czerner {Opt_data_err, EXT4_MOUNT_DATA_ERR_ABORT, MOPT_NO_EXT2}, 179826092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 179926092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 180026092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 180126092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 180226092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 1803ba2e524dSLukas Czerner {Opt_dax_type, 0, MOPT_EXT4_ONLY}, 1804ba2e524dSLukas Czerner {Opt_journal_dev, 0, MOPT_NO_EXT2}, 1805ba2e524dSLukas Czerner {Opt_journal_path, 0, MOPT_NO_EXT2}, 1806ba2e524dSLukas Czerner {Opt_journal_ioprio, 0, MOPT_NO_EXT2}, 1807ba2e524dSLukas Czerner {Opt_data, 0, MOPT_NO_EXT2}, 180826092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 180926092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 181026092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 181126092bf5STheodore Ts'o #else 181226092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 181326092bf5STheodore Ts'o #endif 181426092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 181526092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 181626092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 181726092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 181826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 181926092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 182026092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 182149da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 182249da9392SJan Kara MOPT_SET | MOPT_Q}, 182326092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 182449da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 182549da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 1826ba2e524dSLukas Czerner {Opt_usrjquota, 0, MOPT_Q}, 1827ba2e524dSLukas Czerner {Opt_grpjquota, 0, MOPT_Q}, 1828ba2e524dSLukas Czerner {Opt_jqfmt, 0, MOPT_QFMT}, 1829cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 183021175ca4SHarshad Shirwadkar {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, 18313d392b26STheodore Ts'o MOPT_SET}, 183299c880deSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 18330f0672ffSHarshad Shirwadkar {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, 18340f0672ffSHarshad Shirwadkar MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, 18358016e29fSHarshad Shirwadkar #endif 183626092bf5STheodore Ts'o {Opt_err, 0, 0} 183726092bf5STheodore Ts'o }; 183826092bf5STheodore Ts'o 18395298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 1840c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1841c83ad55eSGabriel Krisman Bertazi __u16 magic; 1842c83ad55eSGabriel Krisman Bertazi char *name; 184349bd03ccSChristoph Hellwig unsigned int version; 1844c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 184549bd03ccSChristoph Hellwig {EXT4_ENC_UTF8_12_1, "utf8", UNICODE_AGE(12, 1, 0)}, 1846c83ad55eSGabriel Krisman Bertazi }; 1847c83ad55eSGabriel Krisman Bertazi 1848aa8bf298SChristoph Hellwig static const struct ext4_sb_encodings * 1849aa8bf298SChristoph Hellwig ext4_sb_read_encoding(const struct ext4_super_block *es) 1850c83ad55eSGabriel Krisman Bertazi { 1851c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1852c83ad55eSGabriel Krisman Bertazi int i; 1853c83ad55eSGabriel Krisman Bertazi 1854c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1855c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1856aa8bf298SChristoph Hellwig return &ext4_sb_encoding_map[i]; 1857c83ad55eSGabriel Krisman Bertazi 1858aa8bf298SChristoph Hellwig return NULL; 1859c83ad55eSGabriel Krisman Bertazi } 1860c83ad55eSGabriel Krisman Bertazi #endif 1861c83ad55eSGabriel Krisman Bertazi 18626e47a3ccSLukas Czerner #define EXT4_SPEC_JQUOTA (1 << 0) 18636e47a3ccSLukas Czerner #define EXT4_SPEC_JQFMT (1 << 1) 18646e47a3ccSLukas Czerner #define EXT4_SPEC_DATAJ (1 << 2) 18656e47a3ccSLukas Czerner #define EXT4_SPEC_SB_BLOCK (1 << 3) 18666e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_DEV (1 << 4) 18676e47a3ccSLukas Czerner #define EXT4_SPEC_JOURNAL_IOPRIO (1 << 5) 18686e47a3ccSLukas Czerner #define EXT4_SPEC_s_want_extra_isize (1 << 7) 18696e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_batch_time (1 << 8) 18706e47a3ccSLukas Czerner #define EXT4_SPEC_s_min_batch_time (1 << 9) 18716e47a3ccSLukas Czerner #define EXT4_SPEC_s_inode_readahead_blks (1 << 10) 18726e47a3ccSLukas Czerner #define EXT4_SPEC_s_li_wait_mult (1 << 11) 18736e47a3ccSLukas Czerner #define EXT4_SPEC_s_max_dir_size_kb (1 << 12) 18746e47a3ccSLukas Czerner #define EXT4_SPEC_s_stripe (1 << 13) 18756e47a3ccSLukas Czerner #define EXT4_SPEC_s_resuid (1 << 14) 18766e47a3ccSLukas Czerner #define EXT4_SPEC_s_resgid (1 << 15) 18776e47a3ccSLukas Czerner #define EXT4_SPEC_s_commit_interval (1 << 16) 18786e47a3ccSLukas Czerner #define EXT4_SPEC_s_fc_debug_max_replay (1 << 17) 18797edfd85bSLukas Czerner #define EXT4_SPEC_s_sb_block (1 << 18) 188027b38686SOjaswin Mujoo #define EXT4_SPEC_mb_optimize_scan (1 << 19) 18816e47a3ccSLukas Czerner 1882461c3af0SLukas Czerner struct ext4_fs_context { 1883e6e268cbSLukas Czerner char *s_qf_names[EXT4_MAXQUOTAS]; 188485456054SEric Biggers struct fscrypt_dummy_policy dummy_enc_policy; 1885e6e268cbSLukas Czerner int s_jquota_fmt; /* Format of quota to use */ 18866e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 18876e47a3ccSLukas Czerner int s_fc_debug_max_replay; 18886e47a3ccSLukas Czerner #endif 18896e47a3ccSLukas Czerner unsigned short qname_spec; 18906e47a3ccSLukas Czerner unsigned long vals_s_flags; /* Bits to set in s_flags */ 18916e47a3ccSLukas Czerner unsigned long mask_s_flags; /* Bits changed in s_flags */ 18926e47a3ccSLukas Czerner unsigned long journal_devnum; 18936e47a3ccSLukas Czerner unsigned long s_commit_interval; 18946e47a3ccSLukas Czerner unsigned long s_stripe; 18956e47a3ccSLukas Czerner unsigned int s_inode_readahead_blks; 18966e47a3ccSLukas Czerner unsigned int s_want_extra_isize; 18976e47a3ccSLukas Czerner unsigned int s_li_wait_mult; 18986e47a3ccSLukas Czerner unsigned int s_max_dir_size_kb; 18996e47a3ccSLukas Czerner unsigned int journal_ioprio; 19006e47a3ccSLukas Czerner unsigned int vals_s_mount_opt; 19016e47a3ccSLukas Czerner unsigned int mask_s_mount_opt; 19026e47a3ccSLukas Czerner unsigned int vals_s_mount_opt2; 19036e47a3ccSLukas Czerner unsigned int mask_s_mount_opt2; 1904e3952fccSLukas Czerner unsigned long vals_s_mount_flags; 1905e3952fccSLukas Czerner unsigned long mask_s_mount_flags; 1906b6bd2435SLukas Czerner unsigned int opt_flags; /* MOPT flags */ 19076e47a3ccSLukas Czerner unsigned int spec; 19086e47a3ccSLukas Czerner u32 s_max_batch_time; 19096e47a3ccSLukas Czerner u32 s_min_batch_time; 19106e47a3ccSLukas Czerner kuid_t s_resuid; 19116e47a3ccSLukas Czerner kgid_t s_resgid; 19127edfd85bSLukas Czerner ext4_fsblk_t s_sb_block; 1913b237e304SHarshad Shirwadkar }; 1914b237e304SHarshad Shirwadkar 1915cebe85d5SLukas Czerner static void ext4_fc_free(struct fs_context *fc) 1916cebe85d5SLukas Czerner { 1917cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1918cebe85d5SLukas Czerner int i; 1919cebe85d5SLukas Czerner 1920cebe85d5SLukas Czerner if (!ctx) 1921cebe85d5SLukas Czerner return; 1922cebe85d5SLukas Czerner 1923cebe85d5SLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) 1924cebe85d5SLukas Czerner kfree(ctx->s_qf_names[i]); 1925cebe85d5SLukas Czerner 192685456054SEric Biggers fscrypt_free_dummy_policy(&ctx->dummy_enc_policy); 1927cebe85d5SLukas Czerner kfree(ctx); 1928cebe85d5SLukas Czerner } 1929cebe85d5SLukas Czerner 1930cebe85d5SLukas Czerner int ext4_init_fs_context(struct fs_context *fc) 1931cebe85d5SLukas Czerner { 1932da9e4802SDan Carpenter struct ext4_fs_context *ctx; 1933cebe85d5SLukas Czerner 1934cebe85d5SLukas Czerner ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 1935cebe85d5SLukas Czerner if (!ctx) 1936cebe85d5SLukas Czerner return -ENOMEM; 1937cebe85d5SLukas Czerner 1938cebe85d5SLukas Czerner fc->fs_private = ctx; 1939cebe85d5SLukas Czerner fc->ops = &ext4_context_ops; 1940cebe85d5SLukas Czerner 1941cebe85d5SLukas Czerner return 0; 1942cebe85d5SLukas Czerner } 1943cebe85d5SLukas Czerner 1944e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 1945e6e268cbSLukas Czerner /* 1946e6e268cbSLukas Czerner * Note the name of the specified quota file. 1947e6e268cbSLukas Czerner */ 1948e6e268cbSLukas Czerner static int note_qf_name(struct fs_context *fc, int qtype, 1949e6e268cbSLukas Czerner struct fs_parameter *param) 1950e6e268cbSLukas Czerner { 1951e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1952e6e268cbSLukas Czerner char *qname; 1953e6e268cbSLukas Czerner 1954e6e268cbSLukas Czerner if (param->size < 1) { 1955e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Missing quota name"); 1956e6e268cbSLukas Czerner return -EINVAL; 1957e6e268cbSLukas Czerner } 1958e6e268cbSLukas Czerner if (strchr(param->string, '/')) { 1959e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 1960e6e268cbSLukas Czerner "quotafile must be on filesystem root"); 1961e6e268cbSLukas Czerner return -EINVAL; 1962e6e268cbSLukas Czerner } 1963e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) { 1964e6e268cbSLukas Czerner if (strcmp(ctx->s_qf_names[qtype], param->string) != 0) { 1965e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 1966e6e268cbSLukas Czerner "%s quota file already specified", 1967e6e268cbSLukas Czerner QTYPE2NAME(qtype)); 1968e6e268cbSLukas Czerner return -EINVAL; 1969e6e268cbSLukas Czerner } 1970e6e268cbSLukas Czerner return 0; 1971e6e268cbSLukas Czerner } 1972e6e268cbSLukas Czerner 1973e6e268cbSLukas Czerner qname = kmemdup_nul(param->string, param->size, GFP_KERNEL); 1974e6e268cbSLukas Czerner if (!qname) { 1975e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 1976e6e268cbSLukas Czerner "Not enough memory for storing quotafile name"); 1977e6e268cbSLukas Czerner return -ENOMEM; 1978e6e268cbSLukas Czerner } 1979e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = qname; 1980e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 19816e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 1982e6e268cbSLukas Czerner return 0; 1983e6e268cbSLukas Czerner } 1984e6e268cbSLukas Czerner 1985e6e268cbSLukas Czerner /* 1986e6e268cbSLukas Czerner * Clear the name of the specified quota file. 1987e6e268cbSLukas Czerner */ 1988e6e268cbSLukas Czerner static int unnote_qf_name(struct fs_context *fc, int qtype) 1989e6e268cbSLukas Czerner { 1990e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 1991e6e268cbSLukas Czerner 1992e6e268cbSLukas Czerner if (ctx->s_qf_names[qtype]) 1993e6e268cbSLukas Czerner kfree(ctx->s_qf_names[qtype]); 1994e6e268cbSLukas Czerner 1995e6e268cbSLukas Czerner ctx->s_qf_names[qtype] = NULL; 1996e6e268cbSLukas Czerner ctx->qname_spec |= 1 << qtype; 19976e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JQUOTA; 1998e6e268cbSLukas Czerner return 0; 1999e6e268cbSLukas Czerner } 2000e6e268cbSLukas Czerner #endif 2001e6e268cbSLukas Czerner 200285456054SEric Biggers static int ext4_parse_test_dummy_encryption(const struct fs_parameter *param, 200385456054SEric Biggers struct ext4_fs_context *ctx) 200485456054SEric Biggers { 200585456054SEric Biggers int err; 200685456054SEric Biggers 200785456054SEric Biggers if (!IS_ENABLED(CONFIG_FS_ENCRYPTION)) { 200885456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 200985456054SEric Biggers "test_dummy_encryption option not supported"); 201085456054SEric Biggers return -EINVAL; 201185456054SEric Biggers } 201285456054SEric Biggers err = fscrypt_parse_test_dummy_encryption(param, 201385456054SEric Biggers &ctx->dummy_enc_policy); 201485456054SEric Biggers if (err == -EINVAL) { 201585456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 201685456054SEric Biggers "Value of option \"%s\" is unrecognized", param->key); 201785456054SEric Biggers } else if (err == -EEXIST) { 201885456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 201985456054SEric Biggers "Conflicting test_dummy_encryption options"); 202085456054SEric Biggers return -EINVAL; 202185456054SEric Biggers } 202285456054SEric Biggers return err; 202385456054SEric Biggers } 202485456054SEric Biggers 20256e47a3ccSLukas Czerner #define EXT4_SET_CTX(name) \ 20264c246728SLukas Czerner static inline void ctx_set_##name(struct ext4_fs_context *ctx, \ 20274c246728SLukas Czerner unsigned long flag) \ 20286e47a3ccSLukas Czerner { \ 20296e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20306e47a3ccSLukas Czerner ctx->vals_s_##name |= flag; \ 2031e3952fccSLukas Czerner } 2032e3952fccSLukas Czerner 2033e3952fccSLukas Czerner #define EXT4_CLEAR_CTX(name) \ 20344c246728SLukas Czerner static inline void ctx_clear_##name(struct ext4_fs_context *ctx, \ 20354c246728SLukas Czerner unsigned long flag) \ 20366e47a3ccSLukas Czerner { \ 20376e47a3ccSLukas Czerner ctx->mask_s_##name |= flag; \ 20386e47a3ccSLukas Czerner ctx->vals_s_##name &= ~flag; \ 2039e3952fccSLukas Czerner } 2040e3952fccSLukas Czerner 2041e3952fccSLukas Czerner #define EXT4_TEST_CTX(name) \ 20424c246728SLukas Czerner static inline unsigned long \ 20434c246728SLukas Czerner ctx_test_##name(struct ext4_fs_context *ctx, unsigned long flag) \ 20446e47a3ccSLukas Czerner { \ 20454c246728SLukas Czerner return (ctx->vals_s_##name & flag); \ 2046e3952fccSLukas Czerner } 20476e47a3ccSLukas Czerner 2048e3952fccSLukas Czerner EXT4_SET_CTX(flags); /* set only */ 20496e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt); 2050e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt); 2051e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt); 20526e47a3ccSLukas Czerner EXT4_SET_CTX(mount_opt2); 2053e3952fccSLukas Czerner EXT4_CLEAR_CTX(mount_opt2); 2054e3952fccSLukas Czerner EXT4_TEST_CTX(mount_opt2); 2055e3952fccSLukas Czerner 2056e3952fccSLukas Czerner static inline void ctx_set_mount_flag(struct ext4_fs_context *ctx, int bit) 2057e3952fccSLukas Czerner { 2058e3952fccSLukas Czerner set_bit(bit, &ctx->mask_s_mount_flags); 2059e3952fccSLukas Czerner set_bit(bit, &ctx->vals_s_mount_flags); 2060e3952fccSLukas Czerner } 20616e47a3ccSLukas Czerner 206202f960f8SLukas Czerner static int ext4_parse_param(struct fs_context *fc, struct fs_parameter *param) 206326092bf5STheodore Ts'o { 2064461c3af0SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2065461c3af0SLukas Czerner struct fs_parse_result result; 206626092bf5STheodore Ts'o const struct mount_opts *m; 2067461c3af0SLukas Czerner int is_remount; 206808cefc7aSEric W. Biederman kuid_t uid; 206908cefc7aSEric W. Biederman kgid_t gid; 2070461c3af0SLukas Czerner int token; 2071461c3af0SLukas Czerner 2072461c3af0SLukas Czerner token = fs_parse(fc, ext4_param_specs, param, &result); 2073461c3af0SLukas Czerner if (token < 0) 2074461c3af0SLukas Czerner return token; 2075461c3af0SLukas Czerner is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 207626092bf5STheodore Ts'o 2077ba2e524dSLukas Czerner for (m = ext4_mount_opts; m->token != Opt_err; m++) 2078ba2e524dSLukas Czerner if (token == m->token) 2079ba2e524dSLukas Czerner break; 2080ba2e524dSLukas Czerner 2081ba2e524dSLukas Czerner ctx->opt_flags |= m->flags; 2082ba2e524dSLukas Czerner 2083ba2e524dSLukas Czerner if (m->flags & MOPT_EXPLICIT) { 2084ba2e524dSLukas Czerner if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 2085ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_EXPLICIT_DELALLOC); 2086ba2e524dSLukas Czerner } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 2087ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, 2088ba2e524dSLukas Czerner EXT4_MOUNT2_EXPLICIT_JOURNAL_CHECKSUM); 2089ba2e524dSLukas Czerner } else 2090ba2e524dSLukas Czerner return -EINVAL; 2091ba2e524dSLukas Czerner } 2092ba2e524dSLukas Czerner 2093ba2e524dSLukas Czerner if (m->flags & MOPT_NOSUPPORT) { 2094ba2e524dSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s option not supported", 2095ba2e524dSLukas Czerner param->key); 2096ba2e524dSLukas Czerner return 0; 2097ba2e524dSLukas Czerner } 2098ba2e524dSLukas Czerner 2099ba2e524dSLukas Czerner switch (token) { 210057f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 2101ba2e524dSLukas Czerner case Opt_usrjquota: 2102461c3af0SLukas Czerner if (!*param->string) 2103e6e268cbSLukas Czerner return unnote_qf_name(fc, USRQUOTA); 2104461c3af0SLukas Czerner else 2105e6e268cbSLukas Czerner return note_qf_name(fc, USRQUOTA, param); 2106ba2e524dSLukas Czerner case Opt_grpjquota: 2107461c3af0SLukas Czerner if (!*param->string) 2108e6e268cbSLukas Czerner return unnote_qf_name(fc, GRPQUOTA); 2109461c3af0SLukas Czerner else 2110e6e268cbSLukas Czerner return note_qf_name(fc, GRPQUOTA, param); 211157f73c2cSTheodore Ts'o #endif 211226092bf5STheodore Ts'o case Opt_sb: 21137edfd85bSLukas Czerner if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 21147edfd85bSLukas Czerner ext4_msg(NULL, KERN_WARNING, 21157edfd85bSLukas Czerner "Ignoring %s option on remount", param->key); 21167edfd85bSLukas Czerner } else { 21177edfd85bSLukas Czerner ctx->s_sb_block = result.uint_32; 21187edfd85bSLukas Czerner ctx->spec |= EXT4_SPEC_s_sb_block; 21197edfd85bSLukas Czerner } 212002f960f8SLukas Czerner return 0; 212126092bf5STheodore Ts'o case Opt_removed: 2122da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, "Ignoring removed %s option", 2123461c3af0SLukas Czerner param->key); 212402f960f8SLukas Czerner return 0; 212526092bf5STheodore Ts'o case Opt_abort: 2126e3952fccSLukas Czerner ctx_set_mount_flag(ctx, EXT4_MF_FS_ABORTED); 212702f960f8SLukas Czerner return 0; 21284f74d15fSEric Biggers case Opt_inlinecrypt: 21294f74d15fSEric Biggers #ifdef CONFIG_FS_ENCRYPTION_INLINE_CRYPT 21306e47a3ccSLukas Czerner ctx_set_flags(ctx, SB_INLINECRYPT); 21314f74d15fSEric Biggers #else 2132da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "inline encryption not supported"); 21334f74d15fSEric Biggers #endif 213402f960f8SLukas Czerner return 0; 2135461c3af0SLukas Czerner case Opt_errors: 21366e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_ERRORS_MASK); 2137ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2138ba2e524dSLukas Czerner return 0; 2139ba2e524dSLukas Czerner #ifdef CONFIG_QUOTA 2140ba2e524dSLukas Czerner case Opt_jqfmt: 2141ba2e524dSLukas Czerner ctx->s_jquota_fmt = result.uint_32; 2142ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_JQFMT; 2143ba2e524dSLukas Czerner return 0; 2144ba2e524dSLukas Czerner #endif 2145ba2e524dSLukas Czerner case Opt_data: 2146ba2e524dSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 2147ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, result.uint_32); 2148ba2e524dSLukas Czerner ctx->spec |= EXT4_SPEC_DATAJ; 2149ba2e524dSLukas Czerner return 0; 2150ba2e524dSLukas Czerner case Opt_commit: 2151461c3af0SLukas Czerner if (result.uint_32 == 0) 21526e47a3ccSLukas Czerner ctx->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE; 2153461c3af0SLukas Czerner else if (result.uint_32 > INT_MAX / HZ) { 2154da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 21559ba55543Szhangyi (F) "Invalid commit interval %d, " 21569ba55543Szhangyi (F) "must be smaller than %d", 2157461c3af0SLukas Czerner result.uint_32, INT_MAX / HZ); 2158da812f61SLukas Czerner return -EINVAL; 21599ba55543Szhangyi (F) } 21606e47a3ccSLukas Czerner ctx->s_commit_interval = HZ * result.uint_32; 21616e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_commit_interval; 2162ba2e524dSLukas Czerner return 0; 2163ba2e524dSLukas Czerner case Opt_debug_want_extra_isize: 21646e47a3ccSLukas Czerner if ((result.uint_32 & 1) || (result.uint_32 < 4)) { 2165da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2166461c3af0SLukas Czerner "Invalid want_extra_isize %d", result.uint_32); 2167da812f61SLukas Czerner return -EINVAL; 21689803387cSTheodore Ts'o } 21696e47a3ccSLukas Czerner ctx->s_want_extra_isize = result.uint_32; 21706e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_want_extra_isize; 2171ba2e524dSLukas Czerner return 0; 2172ba2e524dSLukas Czerner case Opt_max_batch_time: 21736e47a3ccSLukas Czerner ctx->s_max_batch_time = result.uint_32; 21746e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_batch_time; 2175ba2e524dSLukas Czerner return 0; 2176ba2e524dSLukas Czerner case Opt_min_batch_time: 21776e47a3ccSLukas Czerner ctx->s_min_batch_time = result.uint_32; 21786e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_min_batch_time; 2179ba2e524dSLukas Czerner return 0; 2180ba2e524dSLukas Czerner case Opt_inode_readahead_blks: 2181461c3af0SLukas Czerner if (result.uint_32 && 2182461c3af0SLukas Czerner (result.uint_32 > (1 << 30) || 2183461c3af0SLukas Czerner !is_power_of_2(result.uint_32))) { 2184da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2185e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2186e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 2187da812f61SLukas Czerner return -EINVAL; 218826092bf5STheodore Ts'o } 21896e47a3ccSLukas Czerner ctx->s_inode_readahead_blks = result.uint_32; 21906e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_inode_readahead_blks; 2191ba2e524dSLukas Czerner return 0; 2192ba2e524dSLukas Czerner case Opt_init_itable: 21936e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_INIT_INODE_TABLE); 21946e47a3ccSLukas Czerner ctx->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 2195461c3af0SLukas Czerner if (param->type == fs_value_is_string) 21966e47a3ccSLukas Czerner ctx->s_li_wait_mult = result.uint_32; 21976e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_li_wait_mult; 2198ba2e524dSLukas Czerner return 0; 2199ba2e524dSLukas Czerner case Opt_max_dir_size_kb: 22006e47a3ccSLukas Czerner ctx->s_max_dir_size_kb = result.uint_32; 22016e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_max_dir_size_kb; 2202ba2e524dSLukas Czerner return 0; 22038016e29fSHarshad Shirwadkar #ifdef CONFIG_EXT4_DEBUG 2204ba2e524dSLukas Czerner case Opt_fc_debug_max_replay: 22056e47a3ccSLukas Czerner ctx->s_fc_debug_max_replay = result.uint_32; 22066e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_fc_debug_max_replay; 2207ba2e524dSLukas Czerner return 0; 22088016e29fSHarshad Shirwadkar #endif 2209ba2e524dSLukas Czerner case Opt_stripe: 22106e47a3ccSLukas Czerner ctx->s_stripe = result.uint_32; 22116e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_stripe; 2212ba2e524dSLukas Czerner return 0; 2213ba2e524dSLukas Czerner case Opt_resuid: 2214461c3af0SLukas Czerner uid = make_kuid(current_user_ns(), result.uint_32); 22150efb3b23SJan Kara if (!uid_valid(uid)) { 2216da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid uid value %d", 2217461c3af0SLukas Czerner result.uint_32); 2218da812f61SLukas Czerner return -EINVAL; 22190efb3b23SJan Kara } 22206e47a3ccSLukas Czerner ctx->s_resuid = uid; 22216e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resuid; 2222ba2e524dSLukas Czerner return 0; 2223ba2e524dSLukas Czerner case Opt_resgid: 2224461c3af0SLukas Czerner gid = make_kgid(current_user_ns(), result.uint_32); 22250efb3b23SJan Kara if (!gid_valid(gid)) { 2226da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid gid value %d", 2227461c3af0SLukas Czerner result.uint_32); 2228da812f61SLukas Czerner return -EINVAL; 22290efb3b23SJan Kara } 22306e47a3ccSLukas Czerner ctx->s_resgid = gid; 22316e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_s_resgid; 2232ba2e524dSLukas Czerner return 0; 2233ba2e524dSLukas Czerner case Opt_journal_dev: 22340efb3b23SJan Kara if (is_remount) { 2235da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 22360efb3b23SJan Kara "Cannot specify journal on remount"); 2237da812f61SLukas Czerner return -EINVAL; 22380efb3b23SJan Kara } 2239461c3af0SLukas Czerner ctx->journal_devnum = result.uint_32; 22406e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2241ba2e524dSLukas Czerner return 0; 2242ba2e524dSLukas Czerner case Opt_journal_path: 2243ba2e524dSLukas Czerner { 2244ad4eec61SEric Sandeen struct inode *journal_inode; 2245ad4eec61SEric Sandeen struct path path; 2246ad4eec61SEric Sandeen int error; 2247ad4eec61SEric Sandeen 2248ad4eec61SEric Sandeen if (is_remount) { 2249da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, 2250ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2251da812f61SLukas Czerner return -EINVAL; 2252ad4eec61SEric Sandeen } 2253ad4eec61SEric Sandeen 2254461c3af0SLukas Czerner error = fs_lookup_param(fc, param, 1, &path); 2255ad4eec61SEric Sandeen if (error) { 2256da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "error: could not find " 2257461c3af0SLukas Czerner "journal device path"); 2258da812f61SLukas Czerner return -EINVAL; 2259ad4eec61SEric Sandeen } 2260ad4eec61SEric Sandeen 22612b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2262461c3af0SLukas Czerner ctx->journal_devnum = new_encode_dev(journal_inode->i_rdev); 22636e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_DEV; 2264ad4eec61SEric Sandeen path_put(&path); 2265ba2e524dSLukas Czerner return 0; 2266ba2e524dSLukas Czerner } 2267ba2e524dSLukas Czerner case Opt_journal_ioprio: 2268461c3af0SLukas Czerner if (result.uint_32 > 7) { 2269da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "Invalid journal IO priority" 22700efb3b23SJan Kara " (must be 0-7)"); 2271da812f61SLukas Czerner return -EINVAL; 22720efb3b23SJan Kara } 2273461c3af0SLukas Czerner ctx->journal_ioprio = 2274461c3af0SLukas Czerner IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, result.uint_32); 22756e47a3ccSLukas Czerner ctx->spec |= EXT4_SPEC_JOURNAL_IOPRIO; 2276ba2e524dSLukas Czerner return 0; 2277ba2e524dSLukas Czerner case Opt_test_dummy_encryption: 227885456054SEric Biggers return ext4_parse_test_dummy_encryption(param, ctx); 2279ba2e524dSLukas Czerner case Opt_dax: 2280ba2e524dSLukas Czerner case Opt_dax_type: 2281ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2282ba2e524dSLukas Czerner { 2283ba2e524dSLukas Czerner int type = (token == Opt_dax) ? 2284ba2e524dSLukas Czerner Opt_dax : result.uint_32; 2285ba2e524dSLukas Czerner 2286ba2e524dSLukas Czerner switch (type) { 22879cb20f94SIra Weiny case Opt_dax: 22889cb20f94SIra Weiny case Opt_dax_always: 2289ba2e524dSLukas Czerner ctx_set_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 22906e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 22919cb20f94SIra Weiny break; 22929cb20f94SIra Weiny case Opt_dax_never: 2293ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 22946e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 22959cb20f94SIra Weiny break; 22969cb20f94SIra Weiny case Opt_dax_inode: 22976e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS); 22986e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER); 22999cb20f94SIra Weiny /* Strictly for printing options */ 2300ba2e524dSLukas Czerner ctx_set_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE); 23019cb20f94SIra Weiny break; 23029cb20f94SIra Weiny } 2303ba2e524dSLukas Czerner return 0; 2304ba2e524dSLukas Czerner } 2305ef83b6e8SDan Williams #else 2306da812f61SLukas Czerner ext4_msg(NULL, KERN_INFO, "dax option not supported"); 2307da812f61SLukas Czerner return -EINVAL; 2308923ae0ffSRoss Zwisler #endif 2309ba2e524dSLukas Czerner case Opt_data_err: 2310ba2e524dSLukas Czerner if (result.uint_32 == Opt_data_err_abort) 23116e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 2312ba2e524dSLukas Czerner else if (result.uint_32 == Opt_data_err_ignore) 23136e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 2314ba2e524dSLukas Czerner return 0; 2315ba2e524dSLukas Czerner case Opt_mb_optimize_scan: 231627b38686SOjaswin Mujoo if (result.int_32 == 1) { 231727b38686SOjaswin Mujoo ctx_set_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 231827b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 231927b38686SOjaswin Mujoo } else if (result.int_32 == 0) { 232027b38686SOjaswin Mujoo ctx_clear_mount_opt2(ctx, EXT4_MOUNT2_MB_OPTIMIZE_SCAN); 232127b38686SOjaswin Mujoo ctx->spec |= EXT4_SPEC_mb_optimize_scan; 232227b38686SOjaswin Mujoo } else { 2323da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2324196e402aSHarshad Shirwadkar "mb_optimize_scan should be set to 0 or 1."); 2325da812f61SLukas Czerner return -EINVAL; 2326196e402aSHarshad Shirwadkar } 2327ba2e524dSLukas Czerner return 0; 2328ba2e524dSLukas Czerner } 2329ba2e524dSLukas Czerner 2330ba2e524dSLukas Czerner /* 2331ba2e524dSLukas Czerner * At this point we should only be getting options requiring MOPT_SET, 2332ba2e524dSLukas Czerner * or MOPT_CLEAR. Anything else is a bug 2333ba2e524dSLukas Czerner */ 2334ba2e524dSLukas Czerner if (m->token == Opt_err) { 2335ba2e524dSLukas Czerner ext4_msg(NULL, KERN_WARNING, "buggy handling of option %s", 2336ba2e524dSLukas Czerner param->key); 2337ba2e524dSLukas Czerner WARN_ON(1); 2338ba2e524dSLukas Czerner return -EINVAL; 2339ba2e524dSLukas Czerner } 2340ba2e524dSLukas Czerner 2341ba2e524dSLukas Czerner else { 2342461c3af0SLukas Czerner unsigned int set = 0; 2343461c3af0SLukas Czerner 2344461c3af0SLukas Czerner if ((param->type == fs_value_is_flag) || 2345461c3af0SLukas Czerner result.uint_32 > 0) 2346461c3af0SLukas Czerner set = 1; 2347461c3af0SLukas Czerner 234826092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 2349461c3af0SLukas Czerner set = !set; 235026092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 2351da812f61SLukas Czerner ext4_msg(NULL, KERN_WARNING, 2352461c3af0SLukas Czerner "buggy handling of option %s", 2353461c3af0SLukas Czerner param->key); 235426092bf5STheodore Ts'o WARN_ON(1); 2355da812f61SLukas Czerner return -EINVAL; 235626092bf5STheodore Ts'o } 2357995a3ed6SHarshad Shirwadkar if (m->flags & MOPT_2) { 2358461c3af0SLukas Czerner if (set != 0) 23596e47a3ccSLukas Czerner ctx_set_mount_opt2(ctx, m->mount_opt); 2360995a3ed6SHarshad Shirwadkar else 23616e47a3ccSLukas Czerner ctx_clear_mount_opt2(ctx, m->mount_opt); 2362995a3ed6SHarshad Shirwadkar } else { 2363461c3af0SLukas Czerner if (set != 0) 23646e47a3ccSLukas Czerner ctx_set_mount_opt(ctx, m->mount_opt); 236526092bf5STheodore Ts'o else 23666e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, m->mount_opt); 236726092bf5STheodore Ts'o } 2368995a3ed6SHarshad Shirwadkar } 2369ba2e524dSLukas Czerner 237002f960f8SLukas Czerner return 0; 237126092bf5STheodore Ts'o } 237226092bf5STheodore Ts'o 23737edfd85bSLukas Czerner static int parse_options(struct fs_context *fc, char *options) 2374ac27a0ecSDave Kleikamp { 2375461c3af0SLukas Czerner struct fs_parameter param; 2376461c3af0SLukas Czerner int ret; 2377461c3af0SLukas Czerner char *key; 2378ac27a0ecSDave Kleikamp 2379ac27a0ecSDave Kleikamp if (!options) 23807edfd85bSLukas Czerner return 0; 2381461c3af0SLukas Czerner 2382461c3af0SLukas Czerner while ((key = strsep(&options, ",")) != NULL) { 2383461c3af0SLukas Czerner if (*key) { 2384461c3af0SLukas Czerner size_t v_len = 0; 2385461c3af0SLukas Czerner char *value = strchr(key, '='); 2386461c3af0SLukas Czerner 2387461c3af0SLukas Czerner param.type = fs_value_is_flag; 2388461c3af0SLukas Czerner param.string = NULL; 2389461c3af0SLukas Czerner 2390461c3af0SLukas Czerner if (value) { 2391461c3af0SLukas Czerner if (value == key) 2392ac27a0ecSDave Kleikamp continue; 2393461c3af0SLukas Czerner 2394461c3af0SLukas Czerner *value++ = 0; 2395461c3af0SLukas Czerner v_len = strlen(value); 2396461c3af0SLukas Czerner param.string = kmemdup_nul(value, v_len, 2397461c3af0SLukas Czerner GFP_KERNEL); 2398461c3af0SLukas Czerner if (!param.string) 23997edfd85bSLukas Czerner return -ENOMEM; 2400461c3af0SLukas Czerner param.type = fs_value_is_string; 2401461c3af0SLukas Czerner } 2402461c3af0SLukas Czerner 2403461c3af0SLukas Czerner param.key = key; 2404461c3af0SLukas Czerner param.size = v_len; 2405461c3af0SLukas Czerner 240602f960f8SLukas Czerner ret = ext4_parse_param(fc, ¶m); 2407461c3af0SLukas Czerner if (param.string) 2408461c3af0SLukas Czerner kfree(param.string); 2409461c3af0SLukas Czerner if (ret < 0) 24107edfd85bSLukas Czerner return ret; 2411ac27a0ecSDave Kleikamp } 2412461c3af0SLukas Czerner } 2413461c3af0SLukas Czerner 24147edfd85bSLukas Czerner ret = ext4_validate_options(fc); 2415da812f61SLukas Czerner if (ret < 0) 24167edfd85bSLukas Czerner return ret; 24177edfd85bSLukas Czerner 24187edfd85bSLukas Czerner return 0; 24197edfd85bSLukas Czerner } 24207edfd85bSLukas Czerner 24217edfd85bSLukas Czerner static int parse_apply_sb_mount_options(struct super_block *sb, 24227edfd85bSLukas Czerner struct ext4_fs_context *m_ctx) 24237edfd85bSLukas Czerner { 24247edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 24257edfd85bSLukas Czerner char *s_mount_opts = NULL; 24267edfd85bSLukas Czerner struct ext4_fs_context *s_ctx = NULL; 24277edfd85bSLukas Czerner struct fs_context *fc = NULL; 24287edfd85bSLukas Czerner int ret = -ENOMEM; 24297edfd85bSLukas Czerner 24307edfd85bSLukas Czerner if (!sbi->s_es->s_mount_opts[0]) 2431da812f61SLukas Czerner return 0; 2432da812f61SLukas Czerner 24337edfd85bSLukas Czerner s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 24347edfd85bSLukas Czerner sizeof(sbi->s_es->s_mount_opts), 24357edfd85bSLukas Czerner GFP_KERNEL); 24367edfd85bSLukas Czerner if (!s_mount_opts) 24377edfd85bSLukas Czerner return ret; 2438e6e268cbSLukas Czerner 24397edfd85bSLukas Czerner fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL); 24407edfd85bSLukas Czerner if (!fc) 24417edfd85bSLukas Czerner goto out_free; 2442e6e268cbSLukas Czerner 24437edfd85bSLukas Czerner s_ctx = kzalloc(sizeof(struct ext4_fs_context), GFP_KERNEL); 24447edfd85bSLukas Czerner if (!s_ctx) 24457edfd85bSLukas Czerner goto out_free; 24467edfd85bSLukas Czerner 24477edfd85bSLukas Czerner fc->fs_private = s_ctx; 24487edfd85bSLukas Czerner fc->s_fs_info = sbi; 24497edfd85bSLukas Czerner 24507edfd85bSLukas Czerner ret = parse_options(fc, s_mount_opts); 24517edfd85bSLukas Czerner if (ret < 0) 24527edfd85bSLukas Czerner goto parse_failed; 24537edfd85bSLukas Czerner 24547edfd85bSLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 24557edfd85bSLukas Czerner if (ret < 0) { 24567edfd85bSLukas Czerner parse_failed: 24577edfd85bSLukas Czerner ext4_msg(sb, KERN_WARNING, 24587edfd85bSLukas Czerner "failed to parse options in superblock: %s", 24597edfd85bSLukas Czerner s_mount_opts); 24607edfd85bSLukas Czerner ret = 0; 24617edfd85bSLukas Czerner goto out_free; 24627edfd85bSLukas Czerner } 24637edfd85bSLukas Czerner 24647edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_DEV) 24657edfd85bSLukas Czerner m_ctx->journal_devnum = s_ctx->journal_devnum; 24667edfd85bSLukas Czerner if (s_ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO) 24677edfd85bSLukas Czerner m_ctx->journal_ioprio = s_ctx->journal_ioprio; 24687edfd85bSLukas Czerner 246985456054SEric Biggers ext4_apply_options(fc, sb); 247085456054SEric Biggers ret = 0; 24717edfd85bSLukas Czerner 24727edfd85bSLukas Czerner out_free: 2473c069db76SEric Biggers if (fc) { 2474c069db76SEric Biggers ext4_fc_free(fc); 24757edfd85bSLukas Czerner kfree(fc); 2476c069db76SEric Biggers } 24777edfd85bSLukas Czerner kfree(s_mount_opts); 24787edfd85bSLukas Czerner return ret; 24794c94bff9SLukas Czerner } 24804c94bff9SLukas Czerner 2481e6e268cbSLukas Czerner static void ext4_apply_quota_options(struct fs_context *fc, 2482e6e268cbSLukas Czerner struct super_block *sb) 2483e6e268cbSLukas Czerner { 2484e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 24856e47a3ccSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2486e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2487e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2488e6e268cbSLukas Czerner char *qname; 2489e6e268cbSLukas Czerner int i; 2490e6e268cbSLukas Czerner 24916e47a3ccSLukas Czerner if (quota_feature) 24926e47a3ccSLukas Czerner return; 24936e47a3ccSLukas Czerner 24946e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2495e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2496e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2497e6e268cbSLukas Czerner continue; 24986e47a3ccSLukas Czerner 2499e6e268cbSLukas Czerner qname = ctx->s_qf_names[i]; /* May be NULL */ 25004c1bd5a9SLukas Czerner if (qname) 25014c1bd5a9SLukas Czerner set_opt(sb, QUOTA); 2502e6e268cbSLukas Czerner ctx->s_qf_names[i] = NULL; 250313b215a9SLukas Czerner qname = rcu_replace_pointer(sbi->s_qf_names[i], qname, 250413b215a9SLukas Czerner lockdep_is_held(&sb->s_umount)); 250513b215a9SLukas Czerner if (qname) 250613b215a9SLukas Czerner kfree_rcu(qname); 2507e6e268cbSLukas Czerner } 25086e47a3ccSLukas Czerner } 25096e47a3ccSLukas Czerner 25106e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) 25116e47a3ccSLukas Czerner sbi->s_jquota_fmt = ctx->s_jquota_fmt; 2512e6e268cbSLukas Czerner #endif 2513e6e268cbSLukas Czerner } 2514e6e268cbSLukas Czerner 2515e6e268cbSLukas Czerner /* 2516e6e268cbSLukas Czerner * Check quota settings consistency. 2517e6e268cbSLukas Czerner */ 2518e6e268cbSLukas Czerner static int ext4_check_quota_consistency(struct fs_context *fc, 2519e6e268cbSLukas Czerner struct super_block *sb) 2520e6e268cbSLukas Czerner { 2521e6e268cbSLukas Czerner #ifdef CONFIG_QUOTA 2522e6e268cbSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 2523e6e268cbSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2524e6e268cbSLukas Czerner bool quota_feature = ext4_has_feature_quota(sb); 2525e6e268cbSLukas Czerner bool quota_loaded = sb_any_quota_loaded(sb); 25266e47a3ccSLukas Czerner bool usr_qf_name, grp_qf_name, usrquota, grpquota; 25276e47a3ccSLukas Czerner int quota_flags, i; 2528e6e268cbSLukas Czerner 25296e47a3ccSLukas Czerner /* 25306e47a3ccSLukas Czerner * We do the test below only for project quotas. 'usrquota' and 25316e47a3ccSLukas Czerner * 'grpquota' mount options are allowed even without quota feature 25326e47a3ccSLukas Czerner * to support legacy quotas in quota files. 25336e47a3ccSLukas Czerner */ 25346e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_PRJQUOTA) && 25356e47a3ccSLukas Czerner !ext4_has_feature_project(sb)) { 25366e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Project quota feature not enabled. " 25376e47a3ccSLukas Czerner "Cannot enable project quota enforcement."); 25386e47a3ccSLukas Czerner return -EINVAL; 25396e47a3ccSLukas Czerner } 25406e47a3ccSLukas Czerner 25416e47a3ccSLukas Czerner quota_flags = EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 25426e47a3ccSLukas Czerner EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA; 25436e47a3ccSLukas Czerner if (quota_loaded && 25446e47a3ccSLukas Czerner ctx->mask_s_mount_opt & quota_flags && 25456e47a3ccSLukas Czerner !ctx_test_mount_opt(ctx, quota_flags)) 25466e47a3ccSLukas Czerner goto err_quota_change; 25476e47a3ccSLukas Czerner 25486e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQUOTA) { 2549e6e268cbSLukas Czerner 2550e6e268cbSLukas Czerner for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2551e6e268cbSLukas Czerner if (!(ctx->qname_spec & (1 << i))) 2552e6e268cbSLukas Czerner continue; 2553e6e268cbSLukas Czerner 25546e47a3ccSLukas Czerner if (quota_loaded && 25556e47a3ccSLukas Czerner !!sbi->s_qf_names[i] != !!ctx->s_qf_names[i]) 2556e6e268cbSLukas Czerner goto err_jquota_change; 2557e6e268cbSLukas Czerner 2558e6e268cbSLukas Czerner if (sbi->s_qf_names[i] && ctx->s_qf_names[i] && 255913b215a9SLukas Czerner strcmp(get_qf_name(sb, sbi, i), 2560e6e268cbSLukas Czerner ctx->s_qf_names[i]) != 0) 2561e6e268cbSLukas Czerner goto err_jquota_specified; 2562e6e268cbSLukas Czerner } 25636e47a3ccSLukas Czerner 25646e47a3ccSLukas Czerner if (quota_feature) { 25656e47a3ccSLukas Czerner ext4_msg(NULL, KERN_INFO, 25666e47a3ccSLukas Czerner "Journaled quota options ignored when " 25676e47a3ccSLukas Czerner "QUOTA feature is enabled"); 25686e47a3ccSLukas Czerner return 0; 25696e47a3ccSLukas Czerner } 2570e6e268cbSLukas Czerner } 2571e6e268cbSLukas Czerner 25726e47a3ccSLukas Czerner if (ctx->spec & EXT4_SPEC_JQFMT) { 2573e6e268cbSLukas Czerner if (sbi->s_jquota_fmt != ctx->s_jquota_fmt && quota_loaded) 25746e47a3ccSLukas Czerner goto err_jquota_change; 2575e6e268cbSLukas Czerner if (quota_feature) { 2576e6e268cbSLukas Czerner ext4_msg(NULL, KERN_INFO, "Quota format mount options " 2577e6e268cbSLukas Czerner "ignored when QUOTA feature is enabled"); 2578e6e268cbSLukas Czerner return 0; 2579e6e268cbSLukas Czerner } 2580e6e268cbSLukas Czerner } 25816e47a3ccSLukas Czerner 25826e47a3ccSLukas Czerner /* Make sure we don't mix old and new quota format */ 25836e47a3ccSLukas Czerner usr_qf_name = (get_qf_name(sb, sbi, USRQUOTA) || 25846e47a3ccSLukas Czerner ctx->s_qf_names[USRQUOTA]); 25856e47a3ccSLukas Czerner grp_qf_name = (get_qf_name(sb, sbi, GRPQUOTA) || 25866e47a3ccSLukas Czerner ctx->s_qf_names[GRPQUOTA]); 25876e47a3ccSLukas Czerner 25886e47a3ccSLukas Czerner usrquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 25896e47a3ccSLukas Czerner test_opt(sb, USRQUOTA)); 25906e47a3ccSLukas Czerner 25916e47a3ccSLukas Czerner grpquota = (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) || 25926e47a3ccSLukas Czerner test_opt(sb, GRPQUOTA)); 25936e47a3ccSLukas Czerner 25946e47a3ccSLukas Czerner if (usr_qf_name) { 25956e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 25966e47a3ccSLukas Czerner usrquota = false; 25976e47a3ccSLukas Czerner } 25986e47a3ccSLukas Czerner if (grp_qf_name) { 25996e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 26006e47a3ccSLukas Czerner grpquota = false; 26016e47a3ccSLukas Czerner } 26026e47a3ccSLukas Czerner 26036e47a3ccSLukas Czerner if (usr_qf_name || grp_qf_name) { 26046e47a3ccSLukas Czerner if (usrquota || grpquota) { 26056e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 26066e47a3ccSLukas Czerner "format mixing"); 26076e47a3ccSLukas Czerner return -EINVAL; 26086e47a3ccSLukas Czerner } 26096e47a3ccSLukas Czerner 26106e47a3ccSLukas Czerner if (!(ctx->spec & EXT4_SPEC_JQFMT || sbi->s_jquota_fmt)) { 26116e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "journaled quota format " 26126e47a3ccSLukas Czerner "not specified"); 26136e47a3ccSLukas Czerner return -EINVAL; 26146e47a3ccSLukas Czerner } 26156e47a3ccSLukas Czerner } 26166e47a3ccSLukas Czerner 2617e6e268cbSLukas Czerner return 0; 2618e6e268cbSLukas Czerner 2619e6e268cbSLukas Czerner err_quota_change: 2620e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, 2621e6e268cbSLukas Czerner "Cannot change quota options when quota turned on"); 2622e6e268cbSLukas Czerner return -EINVAL; 2623e6e268cbSLukas Czerner err_jquota_change: 2624e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change journaled quota " 2625e6e268cbSLukas Czerner "options when quota turned on"); 2626e6e268cbSLukas Czerner return -EINVAL; 2627e6e268cbSLukas Czerner err_jquota_specified: 2628e6e268cbSLukas Czerner ext4_msg(NULL, KERN_ERR, "%s quota file already specified", 2629e6e268cbSLukas Czerner QTYPE2NAME(i)); 2630e6e268cbSLukas Czerner return -EINVAL; 2631e6e268cbSLukas Czerner #else 2632e6e268cbSLukas Czerner return 0; 2633e6e268cbSLukas Czerner #endif 2634e6e268cbSLukas Czerner } 2635e6e268cbSLukas Czerner 26365f41fdaeSEric Biggers static int ext4_check_test_dummy_encryption(const struct fs_context *fc, 26375f41fdaeSEric Biggers struct super_block *sb) 26385f41fdaeSEric Biggers { 26395f41fdaeSEric Biggers const struct ext4_fs_context *ctx = fc->fs_private; 26405f41fdaeSEric Biggers const struct ext4_sb_info *sbi = EXT4_SB(sb); 264185456054SEric Biggers int err; 26425f41fdaeSEric Biggers 264385456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy)) 26445f41fdaeSEric Biggers return 0; 26455f41fdaeSEric Biggers 26465f41fdaeSEric Biggers if (!ext4_has_feature_encrypt(sb)) { 26475f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 26485f41fdaeSEric Biggers "test_dummy_encryption requires encrypt feature"); 26495f41fdaeSEric Biggers return -EINVAL; 26505f41fdaeSEric Biggers } 26515f41fdaeSEric Biggers /* 26525f41fdaeSEric Biggers * This mount option is just for testing, and it's not worthwhile to 26535f41fdaeSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 26545f41fdaeSEric Biggers * needed to allow it to be set or changed during remount. We do allow 26555f41fdaeSEric Biggers * it to be specified during remount, but only if there is no change. 26565f41fdaeSEric Biggers */ 265785456054SEric Biggers if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { 265885456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 265985456054SEric Biggers &ctx->dummy_enc_policy)) 266085456054SEric Biggers return 0; 26615f41fdaeSEric Biggers ext4_msg(NULL, KERN_WARNING, 266285456054SEric Biggers "Can't set or change test_dummy_encryption on remount"); 26635f41fdaeSEric Biggers return -EINVAL; 26645f41fdaeSEric Biggers } 266585456054SEric Biggers /* Also make sure s_mount_opts didn't contain a conflicting value. */ 266685456054SEric Biggers if (fscrypt_is_dummy_policy_set(&sbi->s_dummy_enc_policy)) { 266785456054SEric Biggers if (fscrypt_dummy_policies_equal(&sbi->s_dummy_enc_policy, 266885456054SEric Biggers &ctx->dummy_enc_policy)) 26695f41fdaeSEric Biggers return 0; 267085456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 267185456054SEric Biggers "Conflicting test_dummy_encryption options"); 267285456054SEric Biggers return -EINVAL; 267385456054SEric Biggers } 267485456054SEric Biggers /* 267585456054SEric Biggers * fscrypt_add_test_dummy_key() technically changes the super_block, so 267685456054SEric Biggers * technically it should be delayed until ext4_apply_options() like the 267785456054SEric Biggers * other changes. But since we never get here for remounts (see above), 267885456054SEric Biggers * and this is the last chance to report errors, we do it here. 267985456054SEric Biggers */ 268085456054SEric Biggers err = fscrypt_add_test_dummy_key(sb, &ctx->dummy_enc_policy); 268185456054SEric Biggers if (err) 268285456054SEric Biggers ext4_msg(NULL, KERN_WARNING, 268385456054SEric Biggers "Error adding test dummy encryption key [%d]", err); 268485456054SEric Biggers return err; 268585456054SEric Biggers } 268685456054SEric Biggers 268785456054SEric Biggers static void ext4_apply_test_dummy_encryption(struct ext4_fs_context *ctx, 268885456054SEric Biggers struct super_block *sb) 268985456054SEric Biggers { 269085456054SEric Biggers if (!fscrypt_is_dummy_policy_set(&ctx->dummy_enc_policy) || 269185456054SEric Biggers /* if already set, it was already verified to be the same */ 269285456054SEric Biggers fscrypt_is_dummy_policy_set(&EXT4_SB(sb)->s_dummy_enc_policy)) 269385456054SEric Biggers return; 269485456054SEric Biggers EXT4_SB(sb)->s_dummy_enc_policy = ctx->dummy_enc_policy; 269585456054SEric Biggers memset(&ctx->dummy_enc_policy, 0, sizeof(ctx->dummy_enc_policy)); 269685456054SEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 26975f41fdaeSEric Biggers } 26985f41fdaeSEric Biggers 2699b6bd2435SLukas Czerner static int ext4_check_opt_consistency(struct fs_context *fc, 2700b6bd2435SLukas Czerner struct super_block *sb) 2701b6bd2435SLukas Czerner { 2702b6bd2435SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27036e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27046e47a3ccSLukas Czerner int is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE; 27055f41fdaeSEric Biggers int err; 2706b6bd2435SLukas Czerner 2707b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 2708b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2709b6bd2435SLukas Czerner "Mount option(s) incompatible with ext2"); 2710b6bd2435SLukas Czerner return -EINVAL; 2711b6bd2435SLukas Czerner } 2712b6bd2435SLukas Czerner if ((ctx->opt_flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 2713b6bd2435SLukas Czerner ext4_msg(NULL, KERN_ERR, 2714b6bd2435SLukas Czerner "Mount option(s) incompatible with ext3"); 2715b6bd2435SLukas Czerner return -EINVAL; 2716b6bd2435SLukas Czerner } 2717b6bd2435SLukas Czerner 27186e47a3ccSLukas Czerner if (ctx->s_want_extra_isize > 27196e47a3ccSLukas Czerner (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE)) { 27206e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, 27216e47a3ccSLukas Czerner "Invalid want_extra_isize %d", 27226e47a3ccSLukas Czerner ctx->s_want_extra_isize); 27236e47a3ccSLukas Czerner return -EINVAL; 27246e47a3ccSLukas Czerner } 27256e47a3ccSLukas Czerner 27266e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) { 27276e47a3ccSLukas Czerner int blocksize = 27286e47a3ccSLukas Czerner BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 27296e47a3ccSLukas Czerner if (blocksize < PAGE_SIZE) 27306e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an " 27316e47a3ccSLukas Czerner "experimental mount option 'dioread_nolock' " 27326e47a3ccSLukas Czerner "for blocksize < PAGE_SIZE"); 27336e47a3ccSLukas Czerner } 27346e47a3ccSLukas Czerner 27355f41fdaeSEric Biggers err = ext4_check_test_dummy_encryption(fc, sb); 27365f41fdaeSEric Biggers if (err) 27375f41fdaeSEric Biggers return err; 27386e47a3ccSLukas Czerner 27396e47a3ccSLukas Czerner if ((ctx->spec & EXT4_SPEC_DATAJ) && is_remount) { 27406e47a3ccSLukas Czerner if (!sbi->s_journal) { 27416e47a3ccSLukas Czerner ext4_msg(NULL, KERN_WARNING, 27426e47a3ccSLukas Czerner "Remounting file system with no journal " 27436e47a3ccSLukas Czerner "so ignoring journalled data option"); 27446e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS); 27454c246728SLukas Czerner } else if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DATA_FLAGS) != 27464c246728SLukas Czerner test_opt(sb, DATA_FLAGS)) { 27476e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "Cannot change data mode " 27486e47a3ccSLukas Czerner "on remount"); 27496e47a3ccSLukas Czerner return -EINVAL; 27506e47a3ccSLukas Czerner } 27516e47a3ccSLukas Czerner } 27526e47a3ccSLukas Czerner 27536e47a3ccSLukas Czerner if (is_remount) { 27546e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27556e47a3ccSLukas Czerner (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 27566e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't mount with " 27576e47a3ccSLukas Czerner "both data=journal and dax"); 27586e47a3ccSLukas Czerner return -EINVAL; 27596e47a3ccSLukas Czerner } 27606e47a3ccSLukas Czerner 27616e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DAX_ALWAYS) && 27626e47a3ccSLukas Czerner (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 27636e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 27646e47a3ccSLukas Czerner fail_dax_change_remount: 27656e47a3ccSLukas Czerner ext4_msg(NULL, KERN_ERR, "can't change " 27666e47a3ccSLukas Czerner "dax mount option while remounting"); 27676e47a3ccSLukas Czerner return -EINVAL; 27686e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_NEVER) && 27696e47a3ccSLukas Czerner (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 27706e47a3ccSLukas Czerner (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) { 27716e47a3ccSLukas Czerner goto fail_dax_change_remount; 27726e47a3ccSLukas Czerner } else if (ctx_test_mount_opt2(ctx, EXT4_MOUNT2_DAX_INODE) && 27736e47a3ccSLukas Czerner ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 27746e47a3ccSLukas Czerner (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 27756e47a3ccSLukas Czerner !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) { 27766e47a3ccSLukas Czerner goto fail_dax_change_remount; 27776e47a3ccSLukas Czerner } 27786e47a3ccSLukas Czerner } 27796e47a3ccSLukas Czerner 2780b6bd2435SLukas Czerner return ext4_check_quota_consistency(fc, sb); 2781b6bd2435SLukas Czerner } 2782b6bd2435SLukas Czerner 278385456054SEric Biggers static void ext4_apply_options(struct fs_context *fc, struct super_block *sb) 27846e47a3ccSLukas Czerner { 27856e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 27866e47a3ccSLukas Czerner struct ext4_sb_info *sbi = fc->s_fs_info; 27876e47a3ccSLukas Czerner 27886e47a3ccSLukas Czerner sbi->s_mount_opt &= ~ctx->mask_s_mount_opt; 27896e47a3ccSLukas Czerner sbi->s_mount_opt |= ctx->vals_s_mount_opt; 27906e47a3ccSLukas Czerner sbi->s_mount_opt2 &= ~ctx->mask_s_mount_opt2; 27916e47a3ccSLukas Czerner sbi->s_mount_opt2 |= ctx->vals_s_mount_opt2; 27926e47a3ccSLukas Czerner sbi->s_mount_flags &= ~ctx->mask_s_mount_flags; 27936e47a3ccSLukas Czerner sbi->s_mount_flags |= ctx->vals_s_mount_flags; 27946e47a3ccSLukas Czerner sb->s_flags &= ~ctx->mask_s_flags; 27956e47a3ccSLukas Czerner sb->s_flags |= ctx->vals_s_flags; 27966e47a3ccSLukas Czerner 27976e47a3ccSLukas Czerner #define APPLY(X) ({ if (ctx->spec & EXT4_SPEC_##X) sbi->X = ctx->X; }) 27986e47a3ccSLukas Czerner APPLY(s_commit_interval); 27996e47a3ccSLukas Czerner APPLY(s_stripe); 28006e47a3ccSLukas Czerner APPLY(s_max_batch_time); 28016e47a3ccSLukas Czerner APPLY(s_min_batch_time); 28026e47a3ccSLukas Czerner APPLY(s_want_extra_isize); 28036e47a3ccSLukas Czerner APPLY(s_inode_readahead_blks); 28046e47a3ccSLukas Czerner APPLY(s_max_dir_size_kb); 28056e47a3ccSLukas Czerner APPLY(s_li_wait_mult); 28066e47a3ccSLukas Czerner APPLY(s_resgid); 28076e47a3ccSLukas Czerner APPLY(s_resuid); 28086e47a3ccSLukas Czerner 28096e47a3ccSLukas Czerner #ifdef CONFIG_EXT4_DEBUG 28106e47a3ccSLukas Czerner APPLY(s_fc_debug_max_replay); 28116e47a3ccSLukas Czerner #endif 28126e47a3ccSLukas Czerner 28136e47a3ccSLukas Czerner ext4_apply_quota_options(fc, sb); 281485456054SEric Biggers ext4_apply_test_dummy_encryption(ctx, sb); 28156e47a3ccSLukas Czerner } 28166e47a3ccSLukas Czerner 28176e47a3ccSLukas Czerner 2818da812f61SLukas Czerner static int ext4_validate_options(struct fs_context *fc) 28194c94bff9SLukas Czerner { 2820ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 28216e47a3ccSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 28224c94bff9SLukas Czerner char *usr_qf_name, *grp_qf_name; 28236e47a3ccSLukas Czerner 28246e47a3ccSLukas Czerner usr_qf_name = ctx->s_qf_names[USRQUOTA]; 28256e47a3ccSLukas Czerner grp_qf_name = ctx->s_qf_names[GRPQUOTA]; 28266e47a3ccSLukas Czerner 282733458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 28286e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) && usr_qf_name) 28296e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_USRQUOTA); 2830ac27a0ecSDave Kleikamp 28316e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA) && grp_qf_name) 28326e47a3ccSLukas Czerner ctx_clear_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA); 2833ac27a0ecSDave Kleikamp 28346e47a3ccSLukas Czerner if (ctx_test_mount_opt(ctx, EXT4_MOUNT_USRQUOTA) || 28356e47a3ccSLukas Czerner ctx_test_mount_opt(ctx, EXT4_MOUNT_GRPQUOTA)) { 2836da812f61SLukas Czerner ext4_msg(NULL, KERN_ERR, "old and new quota " 2837b31e1552SEric Sandeen "format mixing"); 2838da812f61SLukas Czerner return -EINVAL; 2839ac27a0ecSDave Kleikamp } 2840ac27a0ecSDave Kleikamp } 2841ac27a0ecSDave Kleikamp #endif 28426e47a3ccSLukas Czerner return 1; 2843ac27a0ecSDave Kleikamp } 2844ac27a0ecSDave Kleikamp 28452adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 28462adf6da8STheodore Ts'o struct super_block *sb) 28472adf6da8STheodore Ts'o { 28482adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 28492adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 285033458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 28512adf6da8STheodore Ts'o 28522adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 28532adf6da8STheodore Ts'o char *fmtname = ""; 28542adf6da8STheodore Ts'o 28552adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 28562adf6da8STheodore Ts'o case QFMT_VFS_OLD: 28572adf6da8STheodore Ts'o fmtname = "vfsold"; 28582adf6da8STheodore Ts'o break; 28592adf6da8STheodore Ts'o case QFMT_VFS_V0: 28602adf6da8STheodore Ts'o fmtname = "vfsv0"; 28612adf6da8STheodore Ts'o break; 28622adf6da8STheodore Ts'o case QFMT_VFS_V1: 28632adf6da8STheodore Ts'o fmtname = "vfsv1"; 28642adf6da8STheodore Ts'o break; 28652adf6da8STheodore Ts'o } 28662adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 28672adf6da8STheodore Ts'o } 28682adf6da8STheodore Ts'o 286933458eabSTheodore Ts'o rcu_read_lock(); 287033458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 287133458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 287233458eabSTheodore Ts'o if (usr_qf_name) 287333458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 287433458eabSTheodore Ts'o if (grp_qf_name) 287533458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 287633458eabSTheodore Ts'o rcu_read_unlock(); 28772adf6da8STheodore Ts'o #endif 28782adf6da8STheodore Ts'o } 28792adf6da8STheodore Ts'o 28805a916be1STheodore Ts'o static const char *token2str(int token) 28815a916be1STheodore Ts'o { 288297d8a670SLukas Czerner const struct fs_parameter_spec *spec; 28835a916be1STheodore Ts'o 288497d8a670SLukas Czerner for (spec = ext4_param_specs; spec->name != NULL; spec++) 288597d8a670SLukas Czerner if (spec->opt == token && !spec->type) 28865a916be1STheodore Ts'o break; 288797d8a670SLukas Czerner return spec->name; 28885a916be1STheodore Ts'o } 28895a916be1STheodore Ts'o 28902adf6da8STheodore Ts'o /* 28912adf6da8STheodore Ts'o * Show an option if 28922adf6da8STheodore Ts'o * - it's set to a non-default value OR 28932adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 28942adf6da8STheodore Ts'o */ 289566acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 289666acdcf4STheodore Ts'o int nodefs) 28972adf6da8STheodore Ts'o { 28982adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 28992adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 290068afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 29015a916be1STheodore Ts'o const struct mount_opts *m; 290266acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 29032adf6da8STheodore Ts'o 290466acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 290566acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 29062adf6da8STheodore Ts'o 29072adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 29085a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 29095a916be1STheodore Ts'o 29105a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 29115a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 29125a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 2913ba2e524dSLukas Czerner m->flags & MOPT_SKIP) 29145a916be1STheodore Ts'o continue; 291568afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 29165a916be1STheodore Ts'o continue; /* skip if same as the default */ 29175a916be1STheodore Ts'o if ((want_set && 29185a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 29195a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 29205a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 29215a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 29225a916be1STheodore Ts'o } 29235a916be1STheodore Ts'o 292408cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 29255a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 292608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 292708cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 292808cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 29295a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 293008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 293108cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 293266acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 29335a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 29345a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 29352adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 29365a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 29372adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 29385a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 293966acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 29405a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 294166acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 29425a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 294366acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 29445a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 294566acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 29465a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 294768afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 294868afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 29492adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 29505a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 29512adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 29525a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 29532adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 29545a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 29555a916be1STheodore Ts'o } 295666acdcf4STheodore Ts'o if (nodefs || 295766acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 29585a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 29592adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 29602adf6da8STheodore Ts'o 2961ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 296266acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 29635a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2964df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2965df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 29667915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 29677915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2968ed318a6cSEric Biggers 2969ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 29702adf6da8STheodore Ts'o 29714f74d15fSEric Biggers if (sb->s_flags & SB_INLINECRYPT) 29724f74d15fSEric Biggers SEQ_OPTS_PUTS("inlinecrypt"); 29734f74d15fSEric Biggers 29749cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 29759cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 29769cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 29779cb20f94SIra Weiny else 29789cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 29799cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 29809cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 29819cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 29829cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 29839cb20f94SIra Weiny } 29843fa5d23eSOjaswin Mujoo 29853fa5d23eSOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 29863fa5d23eSOjaswin Mujoo !test_opt2(sb, MB_OPTIMIZE_SCAN)) { 29873fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=0"); 29883fa5d23eSOjaswin Mujoo } else if (sbi->s_groups_count < MB_DEFAULT_LINEAR_SCAN_THRESHOLD && 29893fa5d23eSOjaswin Mujoo test_opt2(sb, MB_OPTIMIZE_SCAN)) { 29903fa5d23eSOjaswin Mujoo SEQ_OPTS_PUTS("mb_optimize_scan=1"); 29913fa5d23eSOjaswin Mujoo } 29923fa5d23eSOjaswin Mujoo 29932adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 29942adf6da8STheodore Ts'o return 0; 29952adf6da8STheodore Ts'o } 29962adf6da8STheodore Ts'o 299766acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 299866acdcf4STheodore Ts'o { 299966acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 300066acdcf4STheodore Ts'o } 300166acdcf4STheodore Ts'o 3002ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 300366acdcf4STheodore Ts'o { 300466acdcf4STheodore Ts'o struct super_block *sb = seq->private; 300566acdcf4STheodore Ts'o int rc; 300666acdcf4STheodore Ts'o 3007bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 300866acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 300966acdcf4STheodore Ts'o seq_puts(seq, "\n"); 301066acdcf4STheodore Ts'o return rc; 301166acdcf4STheodore Ts'o } 301266acdcf4STheodore Ts'o 3013617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 3014ac27a0ecSDave Kleikamp int read_only) 3015ac27a0ecSDave Kleikamp { 3016617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3017c89128a0SJaegeuk Kim int err = 0; 3018ac27a0ecSDave Kleikamp 3019617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 3020b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 3021b31e1552SEric Sandeen "forcing read-only mode"); 3022c89128a0SJaegeuk Kim err = -EROFS; 30235adaccacSyangerkun goto done; 3024ac27a0ecSDave Kleikamp } 3025ac27a0ecSDave Kleikamp if (read_only) 3026281b5995STheodore Ts'o goto done; 3027617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 3028b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 3029b31e1552SEric Sandeen "running e2fsck is recommended"); 3030c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 3031b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3032b31e1552SEric Sandeen "warning: mounting fs with errors, " 3033b31e1552SEric Sandeen "running e2fsck is recommended"); 3034ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 3035ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 3036ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 3037b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3038b31e1552SEric Sandeen "warning: maximal mount count reached, " 3039b31e1552SEric Sandeen "running e2fsck is recommended"); 3040ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 30416a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 30426a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 3043b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3044b31e1552SEric Sandeen "warning: checktime reached, " 3045b31e1552SEric Sandeen "running e2fsck is recommended"); 30460390131bSFrank Mayhar if (!sbi->s_journal) 3047216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 3048ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 3049617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 3050e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 30516a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 305202f310fcSJan Kara if (sbi->s_journal) { 3053e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 305402f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 305502f310fcSJan Kara ext4_set_feature_orphan_present(sb); 305602f310fcSJan Kara } 3057ac27a0ecSDave Kleikamp 30584392fbc4SJan Kara err = ext4_commit_super(sb); 3059281b5995STheodore Ts'o done: 3060ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 3061a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 3062a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 3063ac27a0ecSDave Kleikamp sb->s_blocksize, 3064ac27a0ecSDave Kleikamp sbi->s_groups_count, 3065617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 3066617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 3067a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 3068c89128a0SJaegeuk Kim return err; 3069ac27a0ecSDave Kleikamp } 3070ac27a0ecSDave Kleikamp 3071117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 3072117fff10STheodore Ts'o { 3073117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 30747c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 307537b0b6b8SDan Carpenter int size, i, j; 3076117fff10STheodore Ts'o 3077117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 3078117fff10STheodore Ts'o return 0; 3079117fff10STheodore Ts'o 3080117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 3081117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 3082117fff10STheodore Ts'o return 0; 3083117fff10STheodore Ts'o 30847c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 30857c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 3086117fff10STheodore Ts'o if (!new_groups) { 30877c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 30887c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 3089117fff10STheodore Ts'o return -ENOMEM; 3090117fff10STheodore Ts'o } 30917c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 30927c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 30937c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 30947c990728SSuraj Jitindar Singh GFP_KERNEL); 30957c990728SSuraj Jitindar Singh if (!new_groups[i]) { 309637b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 309737b0b6b8SDan Carpenter kvfree(new_groups[j]); 30987c990728SSuraj Jitindar Singh kvfree(new_groups); 30997c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 31007c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 31017c990728SSuraj Jitindar Singh return -ENOMEM; 3102117fff10STheodore Ts'o } 31037c990728SSuraj Jitindar Singh } 31047c990728SSuraj Jitindar Singh rcu_read_lock(); 31057c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 31067c990728SSuraj Jitindar Singh if (old_groups) 31077c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 31087c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 31097c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 31107c990728SSuraj Jitindar Singh rcu_read_unlock(); 31117c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 31127c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 31137c990728SSuraj Jitindar Singh if (old_groups) 31147c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 3115117fff10STheodore Ts'o return 0; 3116117fff10STheodore Ts'o } 3117117fff10STheodore Ts'o 3118772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 3119772cb7c8SJose R. Santos { 3120772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 3121772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 31227c990728SSuraj Jitindar Singh struct flex_groups *fg; 3123772cb7c8SJose R. Santos ext4_group_t flex_group; 3124117fff10STheodore Ts'o int i, err; 3125772cb7c8SJose R. Santos 3126503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 3127d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 3128772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 3129772cb7c8SJose R. Santos return 1; 3130772cb7c8SJose R. Santos } 3131772cb7c8SJose R. Santos 3132117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 3133117fff10STheodore Ts'o if (err) 3134772cb7c8SJose R. Santos goto failed; 3135772cb7c8SJose R. Santos 3136772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 313788b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3138772cb7c8SJose R. Santos 3139772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 31407c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 31417c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 314290ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 31437c990728SSuraj Jitindar Singh &fg->free_clusters); 31447c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 3145772cb7c8SJose R. Santos } 3146772cb7c8SJose R. Santos 3147772cb7c8SJose R. Santos return 1; 3148772cb7c8SJose R. Santos failed: 3149772cb7c8SJose R. Santos return 0; 3150772cb7c8SJose R. Santos } 3151772cb7c8SJose R. Santos 3152e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 3153717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3154717d50e4SAndreas Dilger { 3155b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 3156717d50e4SAndreas Dilger __u16 crc = 0; 3157717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 3158e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 3159717d50e4SAndreas Dilger 31609aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 3161feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 3162feb0ab32SDarrick J. Wong __u32 csum32; 3163b47820edSDaeho Jeong __u16 dummy_csum = 0; 3164feb0ab32SDarrick J. Wong 3165feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 3166feb0ab32SDarrick J. Wong sizeof(le_group)); 3167b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 3168b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 3169b47820edSDaeho Jeong sizeof(dummy_csum)); 3170b47820edSDaeho Jeong offset += sizeof(dummy_csum); 3171b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 3172b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 3173b47820edSDaeho Jeong sbi->s_desc_size - offset); 3174feb0ab32SDarrick J. Wong 3175feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 3176feb0ab32SDarrick J. Wong goto out; 3177feb0ab32SDarrick J. Wong } 3178feb0ab32SDarrick J. Wong 3179feb0ab32SDarrick J. Wong /* old crc16 code */ 3180e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 3181813d32f9SDarrick J. Wong return 0; 3182813d32f9SDarrick J. Wong 3183717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 3184717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 3185717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 3186717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 3187717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 3188e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3189717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 3190717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 3191717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 3192717d50e4SAndreas Dilger offset); 3193717d50e4SAndreas Dilger 3194feb0ab32SDarrick J. Wong out: 3195717d50e4SAndreas Dilger return cpu_to_le16(crc); 3196717d50e4SAndreas Dilger } 3197717d50e4SAndreas Dilger 3198feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 3199717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 3200717d50e4SAndreas Dilger { 3201feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 3202e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 3203717d50e4SAndreas Dilger return 0; 3204717d50e4SAndreas Dilger 3205717d50e4SAndreas Dilger return 1; 3206717d50e4SAndreas Dilger } 3207717d50e4SAndreas Dilger 3208feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 3209feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 3210feb0ab32SDarrick J. Wong { 3211feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 3212feb0ab32SDarrick J. Wong return; 3213e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 3214feb0ab32SDarrick J. Wong } 3215feb0ab32SDarrick J. Wong 3216ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 3217bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 3218829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 3219bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 3220ac27a0ecSDave Kleikamp { 3221617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3222617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 3223617ba13bSMingming Cao ext4_fsblk_t last_block; 322444de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 3225bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 3226bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 3227bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 3228ce421581SJose R. Santos int flexbg_flag = 0; 3229bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 3230ac27a0ecSDave Kleikamp 3231e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 3232ce421581SJose R. Santos flexbg_flag = 1; 3233ce421581SJose R. Santos 3234617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 3235ac27a0ecSDave Kleikamp 3236197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 3237197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 3238197cd65aSAkinobu Mita 3239ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 3240bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 3241ac27a0ecSDave Kleikamp else 3242ac27a0ecSDave Kleikamp last_block = first_block + 3243617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 3244ac27a0ecSDave Kleikamp 3245bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 3246bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3247bfff6873SLukas Czerner grp = i; 3248bfff6873SLukas Czerner 32498fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 3250829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 3251829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3252829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 3253829fa70dSTheodore Ts'o "superblock", i); 325418db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 325518db4b4eSTheodore Ts'o return 0; 3256829fa70dSTheodore Ts'o } 325777260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 325877260807STheodore Ts'o block_bitmap <= last_bg_block) { 325977260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 326077260807STheodore Ts'o "Block bitmap for group %u overlaps " 326177260807STheodore Ts'o "block group descriptors", i); 326277260807STheodore Ts'o if (!sb_rdonly(sb)) 326377260807STheodore Ts'o return 0; 326477260807STheodore Ts'o } 32652b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 3266b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3267a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 3268b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 3269ac27a0ecSDave Kleikamp return 0; 3270ac27a0ecSDave Kleikamp } 32718fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 3272829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 3273829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3274829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 3275829fa70dSTheodore Ts'o "superblock", i); 327618db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 327718db4b4eSTheodore Ts'o return 0; 3278829fa70dSTheodore Ts'o } 327977260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 328077260807STheodore Ts'o inode_bitmap <= last_bg_block) { 328177260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 328277260807STheodore Ts'o "Inode bitmap for group %u overlaps " 328377260807STheodore Ts'o "block group descriptors", i); 328477260807STheodore Ts'o if (!sb_rdonly(sb)) 328577260807STheodore Ts'o return 0; 328677260807STheodore Ts'o } 32872b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 3288b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3289a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 3290b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 3291ac27a0ecSDave Kleikamp return 0; 3292ac27a0ecSDave Kleikamp } 32938fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 3294829fa70dSTheodore Ts'o if (inode_table == sb_block) { 3295829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3296829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 3297829fa70dSTheodore Ts'o "superblock", i); 329818db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 329918db4b4eSTheodore Ts'o return 0; 3300829fa70dSTheodore Ts'o } 330177260807STheodore Ts'o if (inode_table >= sb_block + 1 && 330277260807STheodore Ts'o inode_table <= last_bg_block) { 330377260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 330477260807STheodore Ts'o "Inode table for group %u overlaps " 330577260807STheodore Ts'o "block group descriptors", i); 330677260807STheodore Ts'o if (!sb_rdonly(sb)) 330777260807STheodore Ts'o return 0; 330877260807STheodore Ts'o } 3309bd81d8eeSLaurent Vivier if (inode_table < first_block || 33102b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 3311b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3312a9df9a49STheodore Ts'o "Inode table for group %u not in group " 3313b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 3314ac27a0ecSDave Kleikamp return 0; 3315ac27a0ecSDave Kleikamp } 3316955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 3317feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 3318b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 3319b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 3320e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 3321fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 3322bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 3323955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3324717d50e4SAndreas Dilger return 0; 3325717d50e4SAndreas Dilger } 33267ee1ec4cSLi Zefan } 3327955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 3328ce421581SJose R. Santos if (!flexbg_flag) 3329617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 3330ac27a0ecSDave Kleikamp } 3331bfff6873SLukas Czerner if (NULL != first_not_zeroed) 3332bfff6873SLukas Czerner *first_not_zeroed = grp; 3333ac27a0ecSDave Kleikamp return 1; 3334ac27a0ecSDave Kleikamp } 3335ac27a0ecSDave Kleikamp 3336cd2291a4SEric Sandeen /* 3337cd2291a4SEric Sandeen * Maximal extent format file size. 3338cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 3339cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 3340cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 3341cd2291a4SEric Sandeen * so that won't be a limiting factor. 3342cd2291a4SEric Sandeen * 3343f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 3344f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 3345f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 3346f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 3347f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 3348f17722f9SLukas Czerner * 3349cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 3350cd2291a4SEric Sandeen */ 3351f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 3352cd2291a4SEric Sandeen { 3353cd2291a4SEric Sandeen loff_t res; 3354cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 3355cd2291a4SEric Sandeen 335672deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 335772deb455SChristoph Hellwig 335872deb455SChristoph Hellwig if (!has_huge_files) { 3359cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 3360cd2291a4SEric Sandeen 3361cd2291a4SEric Sandeen /* total blocks in file system block size */ 3362cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 3363cd2291a4SEric Sandeen upper_limit <<= blkbits; 3364cd2291a4SEric Sandeen } 3365cd2291a4SEric Sandeen 3366f17722f9SLukas Czerner /* 3367f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 3368f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 3369f17722f9SLukas Czerner * size 3370f17722f9SLukas Czerner */ 3371f17722f9SLukas Czerner res = (1LL << 32) - 1; 3372cd2291a4SEric Sandeen res <<= blkbits; 3373cd2291a4SEric Sandeen 3374cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 3375cd2291a4SEric Sandeen if (res > upper_limit) 3376cd2291a4SEric Sandeen res = upper_limit; 3377cd2291a4SEric Sandeen 3378cd2291a4SEric Sandeen return res; 3379cd2291a4SEric Sandeen } 3380ac27a0ecSDave Kleikamp 3381ac27a0ecSDave Kleikamp /* 3382cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 33830fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 33840fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 3385ac27a0ecSDave Kleikamp */ 3386f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 3387ac27a0ecSDave Kleikamp { 33885c93e8ecSZhang Yi loff_t upper_limit, res = EXT4_NDIR_BLOCKS; 33890fc1b451SAneesh Kumar K.V int meta_blocks; 33905c93e8ecSZhang Yi unsigned int ppb = 1 << (bits - 2); 339175ca6ad4SRitesh Harjani 339275ca6ad4SRitesh Harjani /* 339375ca6ad4SRitesh Harjani * This is calculated to be the largest file size for a dense, block 33940b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 33950b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 33960b8e58a1SAndreas Dilger * 33970b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 33980b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 33990fc1b451SAneesh Kumar K.V */ 340072deb455SChristoph Hellwig if (!has_huge_files) { 34010fc1b451SAneesh Kumar K.V /* 340272deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 340372deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 340472deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 34050fc1b451SAneesh Kumar K.V */ 34060fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 34070fc1b451SAneesh Kumar K.V 34080fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 34090fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 34100fc1b451SAneesh Kumar K.V 34110fc1b451SAneesh Kumar K.V } else { 34128180a562SAneesh Kumar K.V /* 34138180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 34148180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 34158180a562SAneesh Kumar K.V * represent total number of blocks in 34168180a562SAneesh Kumar K.V * file system block size 34178180a562SAneesh Kumar K.V */ 34180fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 34190fc1b451SAneesh Kumar K.V 34200fc1b451SAneesh Kumar K.V } 34210fc1b451SAneesh Kumar K.V 34225c93e8ecSZhang Yi /* Compute how many blocks we can address by block tree */ 34235c93e8ecSZhang Yi res += ppb; 34245c93e8ecSZhang Yi res += ppb * ppb; 34255c93e8ecSZhang Yi res += ((loff_t)ppb) * ppb * ppb; 34265c93e8ecSZhang Yi /* Compute how many metadata blocks are needed */ 34275c93e8ecSZhang Yi meta_blocks = 1; 34285c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34295c93e8ecSZhang Yi meta_blocks += 1 + ppb + ppb * ppb; 34305c93e8ecSZhang Yi /* Does block tree limit file size? */ 34315c93e8ecSZhang Yi if (res + meta_blocks <= upper_limit) 34325c93e8ecSZhang Yi goto check_lfs; 34335c93e8ecSZhang Yi 34345c93e8ecSZhang Yi res = upper_limit; 34355c93e8ecSZhang Yi /* How many metadata blocks are needed for addressing upper_limit? */ 34365c93e8ecSZhang Yi upper_limit -= EXT4_NDIR_BLOCKS; 34370fc1b451SAneesh Kumar K.V /* indirect blocks */ 34380fc1b451SAneesh Kumar K.V meta_blocks = 1; 34395c93e8ecSZhang Yi upper_limit -= ppb; 34400fc1b451SAneesh Kumar K.V /* double indirect blocks */ 34415c93e8ecSZhang Yi if (upper_limit < ppb * ppb) { 34425c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb); 34435c93e8ecSZhang Yi res -= meta_blocks; 34445c93e8ecSZhang Yi goto check_lfs; 34455c93e8ecSZhang Yi } 34465c93e8ecSZhang Yi meta_blocks += 1 + ppb; 34475c93e8ecSZhang Yi upper_limit -= ppb * ppb; 34485c93e8ecSZhang Yi /* tripple indirect blocks for the rest */ 34495c93e8ecSZhang Yi meta_blocks += 1 + DIV_ROUND_UP_ULL(upper_limit, ppb) + 34505c93e8ecSZhang Yi DIV_ROUND_UP_ULL(upper_limit, ppb*ppb); 34515c93e8ecSZhang Yi res -= meta_blocks; 34525c93e8ecSZhang Yi check_lfs: 3453ac27a0ecSDave Kleikamp res <<= bits; 34540fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 34550fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 34560fc1b451SAneesh Kumar K.V 34575c93e8ecSZhang Yi return res; 3458ac27a0ecSDave Kleikamp } 3459ac27a0ecSDave Kleikamp 3460617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 346170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3462ac27a0ecSDave Kleikamp { 3463617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3464fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3465ac27a0ecSDave Kleikamp int has_super = 0; 3466ac27a0ecSDave Kleikamp 3467ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3468ac27a0ecSDave Kleikamp 3469e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 347070bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3471ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3472617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3473ac27a0ecSDave Kleikamp has_super = 1; 34740b8e58a1SAndreas Dilger 3475bd63f6b0SDarrick J. Wong /* 3476bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3477bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3478bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3479bd63f6b0SDarrick J. Wong * compensate. 3480bd63f6b0SDarrick J. Wong */ 3481bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 348249598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3483bd63f6b0SDarrick J. Wong has_super++; 3484bd63f6b0SDarrick J. Wong 3485617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3486ac27a0ecSDave Kleikamp } 3487ac27a0ecSDave Kleikamp 3488c9de560dSAlex Tomas /** 3489c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3490c9de560dSAlex Tomas * @sbi: In memory super block info 3491c9de560dSAlex Tomas * 3492c9de560dSAlex Tomas * If we have specified it via mount option, then 3493c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3494c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3495c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3496c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3497c9de560dSAlex Tomas * 3498c9de560dSAlex Tomas */ 3499c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3500c9de560dSAlex Tomas { 3501c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3502c9de560dSAlex Tomas unsigned long stripe_width = 3503c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 35043eb08658SDan Ehrenberg int ret; 3505c9de560dSAlex Tomas 3506c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 35073eb08658SDan Ehrenberg ret = sbi->s_stripe; 35085469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 35093eb08658SDan Ehrenberg ret = stripe_width; 35105469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 35113eb08658SDan Ehrenberg ret = stride; 35123eb08658SDan Ehrenberg else 35133eb08658SDan Ehrenberg ret = 0; 3514c9de560dSAlex Tomas 35153eb08658SDan Ehrenberg /* 35163eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 35173eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 35183eb08658SDan Ehrenberg */ 35193eb08658SDan Ehrenberg if (ret <= 1) 35203eb08658SDan Ehrenberg ret = 0; 3521c9de560dSAlex Tomas 35223eb08658SDan Ehrenberg return ret; 3523c9de560dSAlex Tomas } 3524ac27a0ecSDave Kleikamp 3525a13fb1a4SEric Sandeen /* 3526a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3527a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3528a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3529a13fb1a4SEric Sandeen * 0 if it cannot be. 3530a13fb1a4SEric Sandeen */ 353125c6d98fSJan Kara int ext4_feature_set_ok(struct super_block *sb, int readonly) 3532a13fb1a4SEric Sandeen { 3533e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3534a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3535a13fb1a4SEric Sandeen "Couldn't mount because of " 3536a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3537a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3538a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3539a13fb1a4SEric Sandeen return 0; 3540a13fb1a4SEric Sandeen } 3541a13fb1a4SEric Sandeen 35425298d4bfSChristoph Hellwig #if !IS_ENABLED(CONFIG_UNICODE) 3543c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3544c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3545c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3546c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3547c83ad55eSGabriel Krisman Bertazi return 0; 3548c83ad55eSGabriel Krisman Bertazi } 3549c83ad55eSGabriel Krisman Bertazi #endif 3550c83ad55eSGabriel Krisman Bertazi 3551a13fb1a4SEric Sandeen if (readonly) 3552a13fb1a4SEric Sandeen return 1; 3553a13fb1a4SEric Sandeen 3554e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 35552cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 35561751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 35572cb5cc8bSDarrick J. Wong return 1; 35582cb5cc8bSDarrick J. Wong } 35592cb5cc8bSDarrick J. Wong 3560a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3561e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3562a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3563a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3564a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3565a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3566a13fb1a4SEric Sandeen return 0; 3567a13fb1a4SEric Sandeen } 3568e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3569bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3570bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3571bab08ab9STheodore Ts'o "extents feature\n"); 3572bab08ab9STheodore Ts'o return 0; 3573bab08ab9STheodore Ts'o } 35747c319d32SAditya Kali 35759db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3576d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3577d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 35787c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3579d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3580689c958cSLi Xi return 0; 3581689c958cSLi Xi } 35827c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3583a13fb1a4SEric Sandeen return 1; 3584a13fb1a4SEric Sandeen } 3585a13fb1a4SEric Sandeen 358666e61a9eSTheodore Ts'o /* 358766e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 358866e61a9eSTheodore Ts'o * on the file system 358966e61a9eSTheodore Ts'o */ 3590235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 359166e61a9eSTheodore Ts'o { 3592235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3593235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3594235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 359566e61a9eSTheodore Ts'o 359666e61a9eSTheodore Ts'o if (es->s_error_count) 3597ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3598ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 359966e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 360066e61a9eSTheodore Ts'o if (es->s_first_error_time) { 36016a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 36026a0678a7SArnd Bergmann sb->s_id, 36036a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 360466e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 360566e61a9eSTheodore Ts'o es->s_first_error_func, 360666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 360766e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3608651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 360966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 361066e61a9eSTheodore Ts'o if (es->s_first_error_block) 3611651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 361266e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3613651e1c3bSJoe Perches printk(KERN_CONT "\n"); 361466e61a9eSTheodore Ts'o } 361566e61a9eSTheodore Ts'o if (es->s_last_error_time) { 36166a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 36176a0678a7SArnd Bergmann sb->s_id, 36186a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 361966e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 362066e61a9eSTheodore Ts'o es->s_last_error_func, 362166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 362266e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3623651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 362466e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 362566e61a9eSTheodore Ts'o if (es->s_last_error_block) 3626651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 362766e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3628651e1c3bSJoe Perches printk(KERN_CONT "\n"); 362966e61a9eSTheodore Ts'o } 363066e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 363166e61a9eSTheodore Ts'o } 363266e61a9eSTheodore Ts'o 3633bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3634bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3635bfff6873SLukas Czerner { 3636bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 36373d392b26STheodore Ts'o struct super_block *sb = elr->lr_super; 36383d392b26STheodore Ts'o ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 36393d392b26STheodore Ts'o ext4_group_t group = elr->lr_next_group; 36403d392b26STheodore Ts'o unsigned int prefetch_ios = 0; 3641bfff6873SLukas Czerner int ret = 0; 364239fec688SShaoying Xu u64 start_time; 3643bfff6873SLukas Czerner 36443d392b26STheodore Ts'o if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) { 36453d392b26STheodore Ts'o elr->lr_next_group = ext4_mb_prefetch(sb, group, 36463d392b26STheodore Ts'o EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios); 36473d392b26STheodore Ts'o if (prefetch_ios) 36483d392b26STheodore Ts'o ext4_mb_prefetch_fini(sb, elr->lr_next_group, 36493d392b26STheodore Ts'o prefetch_ios); 36503d392b26STheodore Ts'o trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group, 36513d392b26STheodore Ts'o prefetch_ios); 36523d392b26STheodore Ts'o if (group >= elr->lr_next_group) { 36533d392b26STheodore Ts'o ret = 1; 36543d392b26STheodore Ts'o if (elr->lr_first_not_zeroed != ngroups && 36553d392b26STheodore Ts'o !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) { 36563d392b26STheodore Ts'o elr->lr_next_group = elr->lr_first_not_zeroed; 36573d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 36583d392b26STheodore Ts'o ret = 0; 36593d392b26STheodore Ts'o } 36603d392b26STheodore Ts'o } 36613d392b26STheodore Ts'o return ret; 36623d392b26STheodore Ts'o } 3663bfff6873SLukas Czerner 36643d392b26STheodore Ts'o for (; group < ngroups; group++) { 3665bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3666bfff6873SLukas Czerner if (!gdp) { 3667bfff6873SLukas Czerner ret = 1; 3668bfff6873SLukas Czerner break; 3669bfff6873SLukas Czerner } 3670bfff6873SLukas Czerner 3671bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3672bfff6873SLukas Czerner break; 3673bfff6873SLukas Czerner } 3674bfff6873SLukas Czerner 36757f511862STheodore Ts'o if (group >= ngroups) 3676bfff6873SLukas Czerner ret = 1; 3677bfff6873SLukas Czerner 3678bfff6873SLukas Czerner if (!ret) { 367939fec688SShaoying Xu start_time = ktime_get_real_ns(); 3680bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3681bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 36823d392b26STheodore Ts'o trace_ext4_lazy_itable_init(sb, group); 3683bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 368439fec688SShaoying Xu elr->lr_timeout = nsecs_to_jiffies((ktime_get_real_ns() - start_time) * 368539fec688SShaoying Xu EXT4_SB(elr->lr_super)->s_li_wait_mult); 3686bfff6873SLukas Czerner } 3687bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3688bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3689bfff6873SLukas Czerner } 3690bfff6873SLukas Czerner return ret; 3691bfff6873SLukas Czerner } 3692bfff6873SLukas Czerner 3693bfff6873SLukas Czerner /* 3694bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 36954ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3696bfff6873SLukas Czerner */ 3697bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3698bfff6873SLukas Czerner { 3699bfff6873SLukas Czerner if (!elr) 3700bfff6873SLukas Czerner return; 3701bfff6873SLukas Czerner 3702bfff6873SLukas Czerner list_del(&elr->lr_request); 37033d392b26STheodore Ts'o EXT4_SB(elr->lr_super)->s_li_request = NULL; 3704bfff6873SLukas Czerner kfree(elr); 3705bfff6873SLukas Czerner } 3706bfff6873SLukas Czerner 3707bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3708bfff6873SLukas Czerner { 37091bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 37101bb933fbSLukas Czerner if (!ext4_li_info) { 37111bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3712bfff6873SLukas Czerner return; 37131bb933fbSLukas Czerner } 3714bfff6873SLukas Czerner 3715bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 37161bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3717bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 37181bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3719bfff6873SLukas Czerner } 3720bfff6873SLukas Czerner 37218f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 37228f1f7453SEric Sandeen 3723bfff6873SLukas Czerner /* 3724bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3725bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3726bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3727bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3728bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3729bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3730bfff6873SLukas Czerner * next waking time and put itself into sleep. 3731bfff6873SLukas Czerner */ 3732bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3733bfff6873SLukas Czerner { 3734c30365b9SYu Zhe struct ext4_lazy_init *eli = arg; 3735bfff6873SLukas Czerner struct list_head *pos, *n; 3736bfff6873SLukas Czerner struct ext4_li_request *elr; 37374ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3738bfff6873SLukas Czerner 3739bfff6873SLukas Czerner BUG_ON(NULL == eli); 37403b575495SLalith Rajendran set_freezable(); 3741bfff6873SLukas Czerner 3742bfff6873SLukas Czerner cont_thread: 3743bfff6873SLukas Czerner while (true) { 3744bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3745bfff6873SLukas Czerner 3746bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3747bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3748bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3749bfff6873SLukas Czerner goto exit_thread; 3750bfff6873SLukas Czerner } 3751bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3752e22834f0SDmitry Monakhov int err = 0; 3753e22834f0SDmitry Monakhov int progress = 0; 3754bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3755bfff6873SLukas Czerner lr_request); 3756bfff6873SLukas Czerner 3757e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3758e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3759e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3760e22834f0SDmitry Monakhov continue; 3761e22834f0SDmitry Monakhov } 3762e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3763e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3764e22834f0SDmitry Monakhov progress = 1; 3765e22834f0SDmitry Monakhov /* 3766e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3767e22834f0SDmitry Monakhov * be removed from the list, it is 3768e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3769e22834f0SDmitry Monakhov */ 3770e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3771e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3772e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3773e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3774e22834f0SDmitry Monakhov n = pos->next; 3775e22834f0SDmitry Monakhov } 3776e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3777e22834f0SDmitry Monakhov } 3778b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3779e22834f0SDmitry Monakhov if (err) { 3780bfff6873SLukas Czerner ext4_remove_li_request(elr); 3781bfff6873SLukas Czerner continue; 3782bfff6873SLukas Czerner } 3783e22834f0SDmitry Monakhov if (!progress) { 3784e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3785e22834f0SDmitry Monakhov (prandom_u32() 3786e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3787b2c78cd0STheodore Ts'o } 3788bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3789bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3790bfff6873SLukas Czerner } 3791bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3792bfff6873SLukas Czerner 3793a0acae0eSTejun Heo try_to_freeze(); 3794bfff6873SLukas Czerner 37954ed5c033SLukas Czerner cur = jiffies; 37964ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3797f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3798bfff6873SLukas Czerner cond_resched(); 3799bfff6873SLukas Czerner continue; 3800bfff6873SLukas Czerner } 3801bfff6873SLukas Czerner 38024ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 38034ed5c033SLukas Czerner 38048f1f7453SEric Sandeen if (kthread_should_stop()) { 38058f1f7453SEric Sandeen ext4_clear_request_list(); 38068f1f7453SEric Sandeen goto exit_thread; 38078f1f7453SEric Sandeen } 3808bfff6873SLukas Czerner } 3809bfff6873SLukas Czerner 3810bfff6873SLukas Czerner exit_thread: 3811bfff6873SLukas Czerner /* 3812bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3813bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3814bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3815bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3816bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3817bfff6873SLukas Czerner * new one. 3818bfff6873SLukas Czerner */ 3819bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3820bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3821bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3822bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3823bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3824bfff6873SLukas Czerner goto cont_thread; 3825bfff6873SLukas Czerner } 3826bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3827bfff6873SLukas Czerner kfree(ext4_li_info); 3828bfff6873SLukas Czerner ext4_li_info = NULL; 3829bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3830bfff6873SLukas Czerner 3831bfff6873SLukas Czerner return 0; 3832bfff6873SLukas Czerner } 3833bfff6873SLukas Czerner 3834bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3835bfff6873SLukas Czerner { 3836bfff6873SLukas Czerner struct list_head *pos, *n; 3837bfff6873SLukas Czerner struct ext4_li_request *elr; 3838bfff6873SLukas Czerner 3839bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3840bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3841bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3842bfff6873SLukas Czerner lr_request); 3843bfff6873SLukas Czerner ext4_remove_li_request(elr); 3844bfff6873SLukas Czerner } 3845bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3846bfff6873SLukas Czerner } 3847bfff6873SLukas Czerner 3848bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3849bfff6873SLukas Czerner { 38508f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 38518f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 38528f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 38538f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3854bfff6873SLukas Czerner ext4_clear_request_list(); 3855bfff6873SLukas Czerner kfree(ext4_li_info); 3856bfff6873SLukas Czerner ext4_li_info = NULL; 385792b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3858bfff6873SLukas Czerner "initialization thread\n", 3859bfff6873SLukas Czerner err); 3860bfff6873SLukas Czerner return err; 3861bfff6873SLukas Czerner } 3862bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3863bfff6873SLukas Czerner return 0; 3864bfff6873SLukas Czerner } 3865bfff6873SLukas Czerner 3866bfff6873SLukas Czerner /* 3867bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3868bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3869bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3870bfff6873SLukas Czerner * groups and return total number of groups. 3871bfff6873SLukas Czerner */ 3872bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3873bfff6873SLukas Czerner { 3874bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3875bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3876bfff6873SLukas Czerner 38778844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 38788844618dSTheodore Ts'o return ngroups; 38798844618dSTheodore Ts'o 3880bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3881bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3882bfff6873SLukas Czerner if (!gdp) 3883bfff6873SLukas Czerner continue; 3884bfff6873SLukas Czerner 388550122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3886bfff6873SLukas Czerner break; 3887bfff6873SLukas Czerner } 3888bfff6873SLukas Czerner 3889bfff6873SLukas Czerner return group; 3890bfff6873SLukas Czerner } 3891bfff6873SLukas Czerner 3892bfff6873SLukas Czerner static int ext4_li_info_new(void) 3893bfff6873SLukas Czerner { 3894bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3895bfff6873SLukas Czerner 3896bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3897bfff6873SLukas Czerner if (!eli) 3898bfff6873SLukas Czerner return -ENOMEM; 3899bfff6873SLukas Czerner 3900bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3901bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3902bfff6873SLukas Czerner 3903bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3904bfff6873SLukas Czerner 3905bfff6873SLukas Czerner ext4_li_info = eli; 3906bfff6873SLukas Czerner 3907bfff6873SLukas Czerner return 0; 3908bfff6873SLukas Czerner } 3909bfff6873SLukas Czerner 3910bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3911bfff6873SLukas Czerner ext4_group_t start) 3912bfff6873SLukas Czerner { 3913bfff6873SLukas Czerner struct ext4_li_request *elr; 3914bfff6873SLukas Czerner 3915bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3916bfff6873SLukas Czerner if (!elr) 3917bfff6873SLukas Czerner return NULL; 3918bfff6873SLukas Czerner 3919bfff6873SLukas Czerner elr->lr_super = sb; 39203d392b26STheodore Ts'o elr->lr_first_not_zeroed = start; 392121175ca4SHarshad Shirwadkar if (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS)) { 39223d392b26STheodore Ts'o elr->lr_mode = EXT4_LI_MODE_ITABLE; 3923bfff6873SLukas Czerner elr->lr_next_group = start; 392421175ca4SHarshad Shirwadkar } else { 392521175ca4SHarshad Shirwadkar elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP; 39263d392b26STheodore Ts'o } 3927bfff6873SLukas Czerner 3928bfff6873SLukas Czerner /* 3929bfff6873SLukas Czerner * Randomize first schedule time of the request to 3930bfff6873SLukas Czerner * spread the inode table initialization requests 3931bfff6873SLukas Czerner * better. 3932bfff6873SLukas Czerner */ 3933dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3934dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3935bfff6873SLukas Czerner return elr; 3936bfff6873SLukas Czerner } 3937bfff6873SLukas Czerner 39387f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3939bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3940bfff6873SLukas Czerner { 3941bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 39427f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 394349598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 39446c5a6cb9SAndrew Morton int ret = 0; 3945bfff6873SLukas Czerner 39467f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 394751ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 394851ce6511SLukas Czerner /* 394951ce6511SLukas Czerner * Reset timeout so it can be computed again, because 395051ce6511SLukas Czerner * s_li_wait_mult might have changed. 395151ce6511SLukas Czerner */ 395251ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 39537f511862STheodore Ts'o goto out; 395451ce6511SLukas Czerner } 3955bfff6873SLukas Czerner 3956426d15adSJosh Triplett if (sb_rdonly(sb) || 3957426d15adSJosh Triplett (test_opt(sb, NO_PREFETCH_BLOCK_BITMAPS) && 3958426d15adSJosh Triplett (first_not_zeroed == ngroups || !test_opt(sb, INIT_INODE_TABLE)))) 39597f511862STheodore Ts'o goto out; 3960bfff6873SLukas Czerner 3961bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 39627f511862STheodore Ts'o if (!elr) { 39637f511862STheodore Ts'o ret = -ENOMEM; 39647f511862STheodore Ts'o goto out; 39657f511862STheodore Ts'o } 3966bfff6873SLukas Czerner 3967bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3968bfff6873SLukas Czerner ret = ext4_li_info_new(); 3969bfff6873SLukas Czerner if (ret) 3970bfff6873SLukas Czerner goto out; 3971bfff6873SLukas Czerner } 3972bfff6873SLukas Czerner 3973bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3974bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3975bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3976bfff6873SLukas Czerner 3977bfff6873SLukas Czerner sbi->s_li_request = elr; 397846e4690bSTao Ma /* 397946e4690bSTao Ma * set elr to NULL here since it has been inserted to 398046e4690bSTao Ma * the request_list and the removal and free of it is 398146e4690bSTao Ma * handled by ext4_clear_request_list from now on. 398246e4690bSTao Ma */ 398346e4690bSTao Ma elr = NULL; 3984bfff6873SLukas Czerner 3985bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3986bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3987bfff6873SLukas Czerner if (ret) 3988bfff6873SLukas Czerner goto out; 3989bfff6873SLukas Czerner } 3990bfff6873SLukas Czerner out: 3991bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3992beed5ecbSNicolas Kaiser if (ret) 3993bfff6873SLukas Czerner kfree(elr); 3994bfff6873SLukas Czerner return ret; 3995bfff6873SLukas Czerner } 3996bfff6873SLukas Czerner 3997bfff6873SLukas Czerner /* 3998bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3999bfff6873SLukas Czerner * module unload. 4000bfff6873SLukas Czerner */ 4001bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 4002bfff6873SLukas Czerner { 4003bfff6873SLukas Czerner /* 4004bfff6873SLukas Czerner * If thread exited earlier 4005bfff6873SLukas Czerner * there's nothing to be done. 4006bfff6873SLukas Czerner */ 40078f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 4008bfff6873SLukas Czerner return; 4009bfff6873SLukas Czerner 40108f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 4011bfff6873SLukas Czerner } 4012bfff6873SLukas Czerner 401325ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 401425ed6e8aSDarrick J. Wong { 401525ed6e8aSDarrick J. Wong int ret = 1; 401625ed6e8aSDarrick J. Wong int compat, incompat; 401725ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 401825ed6e8aSDarrick J. Wong 40199aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 4020db9ee220SDarrick J. Wong /* journal checksum v3 */ 402125ed6e8aSDarrick J. Wong compat = 0; 4022db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 402325ed6e8aSDarrick J. Wong } else { 402425ed6e8aSDarrick J. Wong /* journal checksum v1 */ 402525ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 402625ed6e8aSDarrick J. Wong incompat = 0; 402725ed6e8aSDarrick J. Wong } 402825ed6e8aSDarrick J. Wong 4029feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 4030feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 4031feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 4032feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 403325ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 403425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 403525ed6e8aSDarrick J. Wong compat, 0, 403625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 403725ed6e8aSDarrick J. Wong incompat); 403825ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 403925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 404025ed6e8aSDarrick J. Wong compat, 0, 404125ed6e8aSDarrick J. Wong incompat); 404225ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 404325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 404425ed6e8aSDarrick J. Wong } else { 4045feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 4046feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 404725ed6e8aSDarrick J. Wong } 404825ed6e8aSDarrick J. Wong 404925ed6e8aSDarrick J. Wong return ret; 405025ed6e8aSDarrick J. Wong } 405125ed6e8aSDarrick J. Wong 4052952fc18eSTheodore Ts'o /* 4053952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 4054952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 4055952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 4056952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 4057952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 4058952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 4059952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 4060952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 4061952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 4062952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 4063952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 4064952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 4065952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 4066952fc18eSTheodore Ts'o */ 4067952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 4068952fc18eSTheodore Ts'o char *buf) 4069952fc18eSTheodore Ts'o { 4070952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4071952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 4072952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 4073952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4074952fc18eSTheodore Ts'o int s, j, count = 0; 407510b01ee9STheodore Ts'o int has_super = ext4_bg_has_super(sb, grp); 4076952fc18eSTheodore Ts'o 4077e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 407810b01ee9STheodore Ts'o return (has_super + ext4_bg_num_gdb(sb, grp) + 407910b01ee9STheodore Ts'o (has_super ? le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) : 0) + 40800548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 40810548bbb8STheodore Ts'o 4082952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 4083952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 4084952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 4085952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4086952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 4087952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 4088952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4089952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4090952fc18eSTheodore Ts'o count++; 4091952fc18eSTheodore Ts'o } 4092952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 4093952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 4094952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 4095952fc18eSTheodore Ts'o count++; 4096952fc18eSTheodore Ts'o } 4097952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 4098952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 4099952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 4100952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 4101952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 4102952fc18eSTheodore Ts'o count++; 4103952fc18eSTheodore Ts'o } 4104952fc18eSTheodore Ts'o if (i != grp) 4105952fc18eSTheodore Ts'o continue; 4106952fc18eSTheodore Ts'o s = 0; 4107952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 4108952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 4109952fc18eSTheodore Ts'o count++; 4110952fc18eSTheodore Ts'o } 4111c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 4112c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 4113c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 4114c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 4115c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 4116952fc18eSTheodore Ts'o } 4117c48ae41bSTheodore Ts'o count += j; 4118c48ae41bSTheodore Ts'o for (; j > 0; j--) 4119c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 4120952fc18eSTheodore Ts'o } 4121952fc18eSTheodore Ts'o if (!count) 4122952fc18eSTheodore Ts'o return 0; 4123952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 4124952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 4125952fc18eSTheodore Ts'o } 4126952fc18eSTheodore Ts'o 4127952fc18eSTheodore Ts'o /* 4128952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 4129952fc18eSTheodore Ts'o */ 4130952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 4131952fc18eSTheodore Ts'o { 4132952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 4133952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 41343c816dedSEric Whitney struct inode *j_inode; 41353c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 4136952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 4137952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 41384fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 4139952fc18eSTheodore Ts'o 4140952fc18eSTheodore Ts'o if (!buf) 4141952fc18eSTheodore Ts'o return -ENOMEM; 4142952fc18eSTheodore Ts'o 4143952fc18eSTheodore Ts'o /* 4144952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 4145952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 4146952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 4147952fc18eSTheodore Ts'o */ 4148952fc18eSTheodore Ts'o 4149952fc18eSTheodore Ts'o /* 4150952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 4151952fc18eSTheodore Ts'o */ 4152952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 4153952fc18eSTheodore Ts'o 4154952fc18eSTheodore Ts'o /* 4155952fc18eSTheodore Ts'o * Add the overhead found in each block group 4156952fc18eSTheodore Ts'o */ 4157952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 4158952fc18eSTheodore Ts'o int blks; 4159952fc18eSTheodore Ts'o 4160952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 4161952fc18eSTheodore Ts'o overhead += blks; 4162952fc18eSTheodore Ts'o if (blks) 4163952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 4164952fc18eSTheodore Ts'o cond_resched(); 4165952fc18eSTheodore Ts'o } 41663c816dedSEric Whitney 41673c816dedSEric Whitney /* 41683c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 41693c816dedSEric Whitney * loaded or not 41703c816dedSEric Whitney */ 4171ee7ed3aaSChunguang Xu if (sbi->s_journal && !sbi->s_journal_bdev) 4172ede7dc7fSHarshad Shirwadkar overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_total_len); 4173f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 4174f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 41753c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 41763c816dedSEric Whitney if (j_inode) { 41773c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 41783c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 41793c816dedSEric Whitney iput(j_inode); 41803c816dedSEric Whitney } else { 41813c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 41823c816dedSEric Whitney } 41833c816dedSEric Whitney } 4184952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 4185952fc18eSTheodore Ts'o smp_wmb(); 4186952fc18eSTheodore Ts'o free_page((unsigned long) buf); 4187952fc18eSTheodore Ts'o return 0; 4188952fc18eSTheodore Ts'o } 4189952fc18eSTheodore Ts'o 4190b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 419127dd4385SLukas Czerner { 419227dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 4193b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 419427dd4385SLukas Czerner 419527dd4385SLukas Czerner /* 419630fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 419730fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 419830fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 419930fac0f7SJan Kara * to keep ext2/3 backward compatibility. 420030fac0f7SJan Kara */ 4201e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 4202b5799018STheodore Ts'o return; 420330fac0f7SJan Kara /* 420427dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 420527dd4385SLukas Czerner * This should cover the situations where we can not afford to run 420627dd4385SLukas Czerner * out of space like for example punch hole, or converting 4207556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 420827dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 420927dd4385SLukas Czerner * very rare. 421027dd4385SLukas Czerner */ 4211b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 4212b5799018STheodore Ts'o sbi->s_cluster_bits); 421327dd4385SLukas Czerner 421427dd4385SLukas Czerner do_div(resv_clusters, 50); 421527dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 421627dd4385SLukas Czerner 4217b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 421827dd4385SLukas Czerner } 421927dd4385SLukas Czerner 4220ca9b404fSRoman Anufriev static const char *ext4_quota_mode(struct super_block *sb) 4221ca9b404fSRoman Anufriev { 4222ca9b404fSRoman Anufriev #ifdef CONFIG_QUOTA 4223ca9b404fSRoman Anufriev if (!ext4_quota_capable(sb)) 4224ca9b404fSRoman Anufriev return "none"; 4225ca9b404fSRoman Anufriev 4226ca9b404fSRoman Anufriev if (EXT4_SB(sb)->s_journal && ext4_is_quota_journalled(sb)) 4227ca9b404fSRoman Anufriev return "journalled"; 4228ca9b404fSRoman Anufriev else 4229ca9b404fSRoman Anufriev return "writeback"; 4230ca9b404fSRoman Anufriev #else 4231ca9b404fSRoman Anufriev return "disabled"; 4232ca9b404fSRoman Anufriev #endif 4233ca9b404fSRoman Anufriev } 4234ca9b404fSRoman Anufriev 4235188c299eSJan Kara static void ext4_setup_csum_trigger(struct super_block *sb, 4236188c299eSJan Kara enum ext4_journal_trigger_type type, 4237188c299eSJan Kara void (*trigger)( 4238188c299eSJan Kara struct jbd2_buffer_trigger_type *type, 4239188c299eSJan Kara struct buffer_head *bh, 4240188c299eSJan Kara void *mapped_data, 4241188c299eSJan Kara size_t size)) 4242188c299eSJan Kara { 4243188c299eSJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 4244188c299eSJan Kara 4245188c299eSJan Kara sbi->s_journal_triggers[type].sb = sb; 4246188c299eSJan Kara sbi->s_journal_triggers[type].tr_triggers.t_frozen = trigger; 4247188c299eSJan Kara } 4248188c299eSJan Kara 42497edfd85bSLukas Czerner static void ext4_free_sbi(struct ext4_sb_info *sbi) 4250ac27a0ecSDave Kleikamp { 42517edfd85bSLukas Czerner if (!sbi) 42527edfd85bSLukas Czerner return; 42537edfd85bSLukas Czerner 42547edfd85bSLukas Czerner kfree(sbi->s_blockgroup_lock); 42558012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 42567edfd85bSLukas Czerner kfree(sbi); 42577edfd85bSLukas Czerner } 42587edfd85bSLukas Czerner 42597edfd85bSLukas Czerner static struct ext4_sb_info *ext4_alloc_sbi(struct super_block *sb) 42607edfd85bSLukas Czerner { 42617edfd85bSLukas Czerner struct ext4_sb_info *sbi; 42627edfd85bSLukas Czerner 42637edfd85bSLukas Czerner sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 42647edfd85bSLukas Czerner if (!sbi) 42657edfd85bSLukas Czerner return NULL; 42667edfd85bSLukas Czerner 42678012b866SShiyang Ruan sbi->s_daxdev = fs_dax_get_by_bdev(sb->s_bdev, &sbi->s_dax_part_off, 42688012b866SShiyang Ruan NULL, NULL); 42697edfd85bSLukas Czerner 42707edfd85bSLukas Czerner sbi->s_blockgroup_lock = 42717edfd85bSLukas Czerner kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 42727edfd85bSLukas Czerner 42737edfd85bSLukas Czerner if (!sbi->s_blockgroup_lock) 42747edfd85bSLukas Czerner goto err_out; 42757edfd85bSLukas Czerner 42767edfd85bSLukas Czerner sb->s_fs_info = sbi; 42777edfd85bSLukas Czerner sbi->s_sb = sb; 42787edfd85bSLukas Czerner return sbi; 42797edfd85bSLukas Czerner err_out: 42808012b866SShiyang Ruan fs_put_dax(sbi->s_daxdev, NULL); 42817edfd85bSLukas Czerner kfree(sbi); 42827edfd85bSLukas Czerner return NULL; 42837edfd85bSLukas Czerner } 42847edfd85bSLukas Czerner 42855f6d662dSJason Yan static void ext4_set_def_opts(struct super_block *sb, 42865f6d662dSJason Yan struct ext4_super_block *es) 42875f6d662dSJason Yan { 42885f6d662dSJason Yan unsigned long def_mount_opts; 42895f6d662dSJason Yan 42905f6d662dSJason Yan /* Set defaults before we parse the mount options */ 42915f6d662dSJason Yan def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 42925f6d662dSJason Yan set_opt(sb, INIT_INODE_TABLE); 42935f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DEBUG) 42945f6d662dSJason Yan set_opt(sb, DEBUG); 42955f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 42965f6d662dSJason Yan set_opt(sb, GRPID); 42975f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_UID16) 42985f6d662dSJason Yan set_opt(sb, NO_UID32); 42995f6d662dSJason Yan /* xattr user namespace & acls are now defaulted on */ 43005f6d662dSJason Yan set_opt(sb, XATTR_USER); 43015f6d662dSJason Yan #ifdef CONFIG_EXT4_FS_POSIX_ACL 43025f6d662dSJason Yan set_opt(sb, POSIX_ACL); 43035f6d662dSJason Yan #endif 43045f6d662dSJason Yan if (ext4_has_feature_fast_commit(sb)) 43055f6d662dSJason Yan set_opt2(sb, JOURNAL_FAST_COMMIT); 43065f6d662dSJason Yan /* don't forget to enable journal_csum when metadata_csum is enabled. */ 43075f6d662dSJason Yan if (ext4_has_metadata_csum(sb)) 43085f6d662dSJason Yan set_opt(sb, JOURNAL_CHECKSUM); 43095f6d662dSJason Yan 43105f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 43115f6d662dSJason Yan set_opt(sb, JOURNAL_DATA); 43125f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 43135f6d662dSJason Yan set_opt(sb, ORDERED_DATA); 43145f6d662dSJason Yan else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 43155f6d662dSJason Yan set_opt(sb, WRITEBACK_DATA); 43165f6d662dSJason Yan 43175f6d662dSJason Yan if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_PANIC) 43185f6d662dSJason Yan set_opt(sb, ERRORS_PANIC); 43195f6d662dSJason Yan else if (le16_to_cpu(es->s_errors) == EXT4_ERRORS_CONTINUE) 43205f6d662dSJason Yan set_opt(sb, ERRORS_CONT); 43215f6d662dSJason Yan else 43225f6d662dSJason Yan set_opt(sb, ERRORS_RO); 43235f6d662dSJason Yan /* block_validity enabled by default; disable with noblock_validity */ 43245f6d662dSJason Yan set_opt(sb, BLOCK_VALIDITY); 43255f6d662dSJason Yan if (def_mount_opts & EXT4_DEFM_DISCARD) 43265f6d662dSJason Yan set_opt(sb, DISCARD); 43275f6d662dSJason Yan 43285f6d662dSJason Yan if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 43295f6d662dSJason Yan set_opt(sb, BARRIER); 43305f6d662dSJason Yan 43315f6d662dSJason Yan /* 43325f6d662dSJason Yan * enable delayed allocation by default 43335f6d662dSJason Yan * Use -o nodelalloc to turn it off 43345f6d662dSJason Yan */ 43355f6d662dSJason Yan if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 43365f6d662dSJason Yan ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 43375f6d662dSJason Yan set_opt(sb, DELALLOC); 43385f6d662dSJason Yan } 43395f6d662dSJason Yan 43404a8557b0SJason Yan static int ext4_handle_clustersize(struct super_block *sb, int blocksize) 43414a8557b0SJason Yan { 43424a8557b0SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 43434a8557b0SJason Yan struct ext4_super_block *es = sbi->s_es; 43444a8557b0SJason Yan int clustersize; 43454a8557b0SJason Yan 43464a8557b0SJason Yan /* Handle clustersize */ 43474a8557b0SJason Yan clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 43484a8557b0SJason Yan if (ext4_has_feature_bigalloc(sb)) { 43494a8557b0SJason Yan if (clustersize < blocksize) { 43504a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 43514a8557b0SJason Yan "cluster size (%d) smaller than " 43524a8557b0SJason Yan "block size (%d)", clustersize, blocksize); 43534a8557b0SJason Yan return -EINVAL; 43544a8557b0SJason Yan } 43554a8557b0SJason Yan sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 43564a8557b0SJason Yan le32_to_cpu(es->s_log_block_size); 43574a8557b0SJason Yan sbi->s_clusters_per_group = 43584a8557b0SJason Yan le32_to_cpu(es->s_clusters_per_group); 43594a8557b0SJason Yan if (sbi->s_clusters_per_group > blocksize * 8) { 43604a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 43614a8557b0SJason Yan "#clusters per group too big: %lu", 43624a8557b0SJason Yan sbi->s_clusters_per_group); 43634a8557b0SJason Yan return -EINVAL; 43644a8557b0SJason Yan } 43654a8557b0SJason Yan if (sbi->s_blocks_per_group != 43664a8557b0SJason Yan (sbi->s_clusters_per_group * (clustersize / blocksize))) { 43674a8557b0SJason Yan ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 43684a8557b0SJason Yan "clusters per group (%lu) inconsistent", 43694a8557b0SJason Yan sbi->s_blocks_per_group, 43704a8557b0SJason Yan sbi->s_clusters_per_group); 43714a8557b0SJason Yan return -EINVAL; 43724a8557b0SJason Yan } 43734a8557b0SJason Yan } else { 43744a8557b0SJason Yan if (clustersize != blocksize) { 43754a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 43764a8557b0SJason Yan "fragment/cluster size (%d) != " 43774a8557b0SJason Yan "block size (%d)", clustersize, blocksize); 43784a8557b0SJason Yan return -EINVAL; 43794a8557b0SJason Yan } 43804a8557b0SJason Yan if (sbi->s_blocks_per_group > blocksize * 8) { 43814a8557b0SJason Yan ext4_msg(sb, KERN_ERR, 43824a8557b0SJason Yan "#blocks per group too big: %lu", 43834a8557b0SJason Yan sbi->s_blocks_per_group); 43844a8557b0SJason Yan return -EINVAL; 43854a8557b0SJason Yan } 43864a8557b0SJason Yan sbi->s_clusters_per_group = sbi->s_blocks_per_group; 43874a8557b0SJason Yan sbi->s_cluster_bits = 0; 43884a8557b0SJason Yan } 43894a8557b0SJason Yan sbi->s_cluster_ratio = clustersize / blocksize; 43904a8557b0SJason Yan 43914a8557b0SJason Yan /* Do we have standard group size of clustersize * 8 blocks ? */ 43924a8557b0SJason Yan if (sbi->s_blocks_per_group == clustersize << 3) 43934a8557b0SJason Yan set_opt2(sb, STD_GROUP_SIZE); 43944a8557b0SJason Yan 43954a8557b0SJason Yan return 0; 43964a8557b0SJason Yan } 43974a8557b0SJason Yan 4398f7314a67SJason Yan static void ext4_fast_commit_init(struct super_block *sb) 4399f7314a67SJason Yan { 4400f7314a67SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4401f7314a67SJason Yan 4402f7314a67SJason Yan /* Initialize fast commit stuff */ 4403f7314a67SJason Yan atomic_set(&sbi->s_fc_subtid, 0); 4404f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]); 4405f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]); 4406f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]); 4407f7314a67SJason Yan INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]); 4408f7314a67SJason Yan sbi->s_fc_bytes = 0; 4409f7314a67SJason Yan ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); 4410f7314a67SJason Yan sbi->s_fc_ineligible_tid = 0; 4411f7314a67SJason Yan spin_lock_init(&sbi->s_fc_lock); 4412f7314a67SJason Yan memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats)); 4413f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions = NULL; 4414f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_size = 0; 4415f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_used = 0; 4416f7314a67SJason Yan sbi->s_fc_replay_state.fc_regions_valid = 0; 4417f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes = NULL; 4418f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_size = 0; 4419f7314a67SJason Yan sbi->s_fc_replay_state.fc_modified_inodes_used = 0; 4420f7314a67SJason Yan } 4421f7314a67SJason Yan 44220e495f7cSJason Yan static int ext4_inode_info_init(struct super_block *sb, 44230e495f7cSJason Yan struct ext4_super_block *es, 44240e495f7cSJason Yan int blocksize) 44250e495f7cSJason Yan { 44260e495f7cSJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 44270e495f7cSJason Yan 44280e495f7cSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 44290e495f7cSJason Yan sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 44300e495f7cSJason Yan sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 44310e495f7cSJason Yan } else { 44320e495f7cSJason Yan sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 44330e495f7cSJason Yan sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 44340e495f7cSJason Yan if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 44350e495f7cSJason Yan ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 44360e495f7cSJason Yan sbi->s_first_ino); 44370e495f7cSJason Yan return -EINVAL; 44380e495f7cSJason Yan } 44390e495f7cSJason Yan if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 44400e495f7cSJason Yan (!is_power_of_2(sbi->s_inode_size)) || 44410e495f7cSJason Yan (sbi->s_inode_size > blocksize)) { 44420e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 44430e495f7cSJason Yan "unsupported inode size: %d", 44440e495f7cSJason Yan sbi->s_inode_size); 44450e495f7cSJason Yan ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 44460e495f7cSJason Yan return -EINVAL; 44470e495f7cSJason Yan } 44480e495f7cSJason Yan /* 44490e495f7cSJason Yan * i_atime_extra is the last extra field available for 44500e495f7cSJason Yan * [acm]times in struct ext4_inode. Checking for that 44510e495f7cSJason Yan * field should suffice to ensure we have extra space 44520e495f7cSJason Yan * for all three. 44530e495f7cSJason Yan */ 44540e495f7cSJason Yan if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 44550e495f7cSJason Yan sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 44560e495f7cSJason Yan sb->s_time_gran = 1; 44570e495f7cSJason Yan sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 44580e495f7cSJason Yan } else { 44590e495f7cSJason Yan sb->s_time_gran = NSEC_PER_SEC; 44600e495f7cSJason Yan sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 44610e495f7cSJason Yan } 44620e495f7cSJason Yan sb->s_time_min = EXT4_TIMESTAMP_MIN; 44630e495f7cSJason Yan } 44640e495f7cSJason Yan 44650e495f7cSJason Yan if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 44660e495f7cSJason Yan sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 44670e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE; 44680e495f7cSJason Yan if (ext4_has_feature_extra_isize(sb)) { 44690e495f7cSJason Yan unsigned v, max = (sbi->s_inode_size - 44700e495f7cSJason Yan EXT4_GOOD_OLD_INODE_SIZE); 44710e495f7cSJason Yan 44720e495f7cSJason Yan v = le16_to_cpu(es->s_want_extra_isize); 44730e495f7cSJason Yan if (v > max) { 44740e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 44750e495f7cSJason Yan "bad s_want_extra_isize: %d", v); 44760e495f7cSJason Yan return -EINVAL; 44770e495f7cSJason Yan } 44780e495f7cSJason Yan if (sbi->s_want_extra_isize < v) 44790e495f7cSJason Yan sbi->s_want_extra_isize = v; 44800e495f7cSJason Yan 44810e495f7cSJason Yan v = le16_to_cpu(es->s_min_extra_isize); 44820e495f7cSJason Yan if (v > max) { 44830e495f7cSJason Yan ext4_msg(sb, KERN_ERR, 44840e495f7cSJason Yan "bad s_min_extra_isize: %d", v); 44850e495f7cSJason Yan return -EINVAL; 44860e495f7cSJason Yan } 44870e495f7cSJason Yan if (sbi->s_want_extra_isize < v) 44880e495f7cSJason Yan sbi->s_want_extra_isize = v; 44890e495f7cSJason Yan } 44900e495f7cSJason Yan } 44910e495f7cSJason Yan 44920e495f7cSJason Yan return 0; 44930e495f7cSJason Yan } 44940e495f7cSJason Yan 449539c135b0SJason Yan #if IS_ENABLED(CONFIG_UNICODE) 449639c135b0SJason Yan static int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 449739c135b0SJason Yan { 449839c135b0SJason Yan const struct ext4_sb_encodings *encoding_info; 449939c135b0SJason Yan struct unicode_map *encoding; 450039c135b0SJason Yan __u16 encoding_flags = le16_to_cpu(es->s_encoding_flags); 450139c135b0SJason Yan 450239c135b0SJason Yan if (!ext4_has_feature_casefold(sb) || sb->s_encoding) 450339c135b0SJason Yan return 0; 450439c135b0SJason Yan 450539c135b0SJason Yan encoding_info = ext4_sb_read_encoding(es); 450639c135b0SJason Yan if (!encoding_info) { 450739c135b0SJason Yan ext4_msg(sb, KERN_ERR, 450839c135b0SJason Yan "Encoding requested by superblock is unknown"); 450939c135b0SJason Yan return -EINVAL; 451039c135b0SJason Yan } 451139c135b0SJason Yan 451239c135b0SJason Yan encoding = utf8_load(encoding_info->version); 451339c135b0SJason Yan if (IS_ERR(encoding)) { 451439c135b0SJason Yan ext4_msg(sb, KERN_ERR, 451539c135b0SJason Yan "can't mount with superblock charset: %s-%u.%u.%u " 451639c135b0SJason Yan "not supported by the kernel. flags: 0x%x.", 451739c135b0SJason Yan encoding_info->name, 451839c135b0SJason Yan unicode_major(encoding_info->version), 451939c135b0SJason Yan unicode_minor(encoding_info->version), 452039c135b0SJason Yan unicode_rev(encoding_info->version), 452139c135b0SJason Yan encoding_flags); 452239c135b0SJason Yan return -EINVAL; 452339c135b0SJason Yan } 452439c135b0SJason Yan ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 452539c135b0SJason Yan "%s-%u.%u.%u with flags 0x%hx", encoding_info->name, 452639c135b0SJason Yan unicode_major(encoding_info->version), 452739c135b0SJason Yan unicode_minor(encoding_info->version), 452839c135b0SJason Yan unicode_rev(encoding_info->version), 452939c135b0SJason Yan encoding_flags); 453039c135b0SJason Yan 453139c135b0SJason Yan sb->s_encoding = encoding; 453239c135b0SJason Yan sb->s_encoding_flags = encoding_flags; 453339c135b0SJason Yan 453439c135b0SJason Yan return 0; 453539c135b0SJason Yan } 453639c135b0SJason Yan #else 453739c135b0SJason Yan static inline int ext4_encoding_init(struct super_block *sb, struct ext4_super_block *es) 453839c135b0SJason Yan { 453939c135b0SJason Yan return 0; 454039c135b0SJason Yan } 454139c135b0SJason Yan #endif 454239c135b0SJason Yan 4543b26458d1SJason Yan static int ext4_init_metadata_csum(struct super_block *sb, struct ext4_super_block *es) 4544b26458d1SJason Yan { 4545b26458d1SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4546b26458d1SJason Yan 4547b26458d1SJason Yan /* Warn if metadata_csum and gdt_csum are both set. */ 4548b26458d1SJason Yan if (ext4_has_feature_metadata_csum(sb) && 4549b26458d1SJason Yan ext4_has_feature_gdt_csum(sb)) 4550b26458d1SJason Yan ext4_warning(sb, "metadata_csum and uninit_bg are " 4551b26458d1SJason Yan "redundant flags; please run fsck."); 4552b26458d1SJason Yan 4553b26458d1SJason Yan /* Check for a known checksum algorithm */ 4554b26458d1SJason Yan if (!ext4_verify_csum_type(sb, es)) { 4555b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4556b26458d1SJason Yan "unknown checksum algorithm."); 4557b26458d1SJason Yan return -EINVAL; 4558b26458d1SJason Yan } 4559b26458d1SJason Yan ext4_setup_csum_trigger(sb, EXT4_JTR_ORPHAN_FILE, 4560b26458d1SJason Yan ext4_orphan_file_block_trigger); 4561b26458d1SJason Yan 4562b26458d1SJason Yan /* Load the checksum driver */ 4563b26458d1SJason Yan sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 4564b26458d1SJason Yan if (IS_ERR(sbi->s_chksum_driver)) { 4565b26458d1SJason Yan int ret = PTR_ERR(sbi->s_chksum_driver); 4566b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 4567b26458d1SJason Yan sbi->s_chksum_driver = NULL; 4568b26458d1SJason Yan return ret; 4569b26458d1SJason Yan } 4570b26458d1SJason Yan 4571b26458d1SJason Yan /* Check superblock checksum */ 4572b26458d1SJason Yan if (!ext4_superblock_csum_verify(sb, es)) { 4573b26458d1SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 4574b26458d1SJason Yan "invalid superblock checksum. Run e2fsck?"); 4575b26458d1SJason Yan return -EFSBADCRC; 4576b26458d1SJason Yan } 4577b26458d1SJason Yan 4578b26458d1SJason Yan /* Precompute checksum seed for all metadata */ 4579b26458d1SJason Yan if (ext4_has_feature_csum_seed(sb)) 4580b26458d1SJason Yan sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 4581b26458d1SJason Yan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 4582b26458d1SJason Yan sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 4583b26458d1SJason Yan sizeof(es->s_uuid)); 4584b26458d1SJason Yan return 0; 4585b26458d1SJason Yan } 4586b26458d1SJason Yan 4587d7f3542bSJason Yan static int ext4_check_feature_compatibility(struct super_block *sb, 4588d7f3542bSJason Yan struct ext4_super_block *es, 4589d7f3542bSJason Yan int silent) 4590d7f3542bSJason Yan { 4591d7f3542bSJason Yan if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4592d7f3542bSJason Yan (ext4_has_compat_features(sb) || 4593d7f3542bSJason Yan ext4_has_ro_compat_features(sb) || 4594d7f3542bSJason Yan ext4_has_incompat_features(sb))) 4595d7f3542bSJason Yan ext4_msg(sb, KERN_WARNING, 4596d7f3542bSJason Yan "feature flags set on rev 0 fs, " 4597d7f3542bSJason Yan "running e2fsck is recommended"); 4598d7f3542bSJason Yan 4599d7f3542bSJason Yan if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4600d7f3542bSJason Yan set_opt2(sb, HURD_COMPAT); 4601d7f3542bSJason Yan if (ext4_has_feature_64bit(sb)) { 4602d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4603d7f3542bSJason Yan "The Hurd can't support 64-bit file systems"); 4604d7f3542bSJason Yan return -EINVAL; 4605d7f3542bSJason Yan } 4606d7f3542bSJason Yan 4607d7f3542bSJason Yan /* 4608d7f3542bSJason Yan * ea_inode feature uses l_i_version field which is not 4609d7f3542bSJason Yan * available in HURD_COMPAT mode. 4610d7f3542bSJason Yan */ 4611d7f3542bSJason Yan if (ext4_has_feature_ea_inode(sb)) { 4612d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, 4613d7f3542bSJason Yan "ea_inode feature is not supported for Hurd"); 4614d7f3542bSJason Yan return -EINVAL; 4615d7f3542bSJason Yan } 4616d7f3542bSJason Yan } 4617d7f3542bSJason Yan 4618d7f3542bSJason Yan if (IS_EXT2_SB(sb)) { 4619d7f3542bSJason Yan if (ext2_feature_set_ok(sb)) 4620d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 4621d7f3542bSJason Yan "using the ext4 subsystem"); 4622d7f3542bSJason Yan else { 4623d7f3542bSJason Yan /* 4624d7f3542bSJason Yan * If we're probing be silent, if this looks like 4625d7f3542bSJason Yan * it's actually an ext[34] filesystem. 4626d7f3542bSJason Yan */ 4627d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4628d7f3542bSJason Yan return -EINVAL; 4629d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 4630d7f3542bSJason Yan "to feature incompatibilities"); 4631d7f3542bSJason Yan return -EINVAL; 4632d7f3542bSJason Yan } 4633d7f3542bSJason Yan } 4634d7f3542bSJason Yan 4635d7f3542bSJason Yan if (IS_EXT3_SB(sb)) { 4636d7f3542bSJason Yan if (ext3_feature_set_ok(sb)) 4637d7f3542bSJason Yan ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 4638d7f3542bSJason Yan "using the ext4 subsystem"); 4639d7f3542bSJason Yan else { 4640d7f3542bSJason Yan /* 4641d7f3542bSJason Yan * If we're probing be silent, if this looks like 4642d7f3542bSJason Yan * it's actually an ext4 filesystem. 4643d7f3542bSJason Yan */ 4644d7f3542bSJason Yan if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 4645d7f3542bSJason Yan return -EINVAL; 4646d7f3542bSJason Yan ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 4647d7f3542bSJason Yan "to feature incompatibilities"); 4648d7f3542bSJason Yan return -EINVAL; 4649d7f3542bSJason Yan } 4650d7f3542bSJason Yan } 4651d7f3542bSJason Yan 4652d7f3542bSJason Yan /* 4653d7f3542bSJason Yan * Check feature flags regardless of the revision level, since we 4654d7f3542bSJason Yan * previously didn't change the revision level when setting the flags, 4655d7f3542bSJason Yan * so there is a chance incompat flags are set on a rev 0 filesystem. 4656d7f3542bSJason Yan */ 4657d7f3542bSJason Yan if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4658d7f3542bSJason Yan return -EINVAL; 4659d7f3542bSJason Yan 4660d7f3542bSJason Yan return 0; 4661d7f3542bSJason Yan } 4662d7f3542bSJason Yan 4663bc62dbf9SJason Yan static int ext4_geometry_check(struct super_block *sb, 4664bc62dbf9SJason Yan struct ext4_super_block *es) 4665bc62dbf9SJason Yan { 4666bc62dbf9SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4667bc62dbf9SJason Yan __u64 blocks_count; 4668bc62dbf9SJason Yan 4669bc62dbf9SJason Yan /* check blocks count against device size */ 4670bc62dbf9SJason Yan blocks_count = sb_bdev_nr_blocks(sb); 4671bc62dbf9SJason Yan if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4672bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4673bc62dbf9SJason Yan "exceeds size of device (%llu blocks)", 4674bc62dbf9SJason Yan ext4_blocks_count(es), blocks_count); 4675bc62dbf9SJason Yan return -EINVAL; 4676bc62dbf9SJason Yan } 4677bc62dbf9SJason Yan 4678bc62dbf9SJason Yan /* 4679bc62dbf9SJason Yan * It makes no sense for the first data block to be beyond the end 4680bc62dbf9SJason Yan * of the filesystem. 4681bc62dbf9SJason Yan */ 4682bc62dbf9SJason Yan if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4683bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4684bc62dbf9SJason Yan "block %u is beyond end of filesystem (%llu)", 4685bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4686bc62dbf9SJason Yan ext4_blocks_count(es)); 4687bc62dbf9SJason Yan return -EINVAL; 4688bc62dbf9SJason Yan } 4689bc62dbf9SJason Yan if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4690bc62dbf9SJason Yan (sbi->s_cluster_ratio == 1)) { 4691bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4692bc62dbf9SJason Yan "block is 0 with a 1k block and cluster size"); 4693bc62dbf9SJason Yan return -EINVAL; 4694bc62dbf9SJason Yan } 4695bc62dbf9SJason Yan 4696bc62dbf9SJason Yan blocks_count = (ext4_blocks_count(es) - 4697bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block) + 4698bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb) - 1); 4699bc62dbf9SJason Yan do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 4700bc62dbf9SJason Yan if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4701bc62dbf9SJason Yan ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 4702bc62dbf9SJason Yan "(block count %llu, first data block %u, " 4703bc62dbf9SJason Yan "blocks per group %lu)", blocks_count, 4704bc62dbf9SJason Yan ext4_blocks_count(es), 4705bc62dbf9SJason Yan le32_to_cpu(es->s_first_data_block), 4706bc62dbf9SJason Yan EXT4_BLOCKS_PER_GROUP(sb)); 4707bc62dbf9SJason Yan return -EINVAL; 4708bc62dbf9SJason Yan } 4709bc62dbf9SJason Yan sbi->s_groups_count = blocks_count; 4710bc62dbf9SJason Yan sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4711bc62dbf9SJason Yan (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 4712bc62dbf9SJason Yan if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 4713bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count)) { 4714bc62dbf9SJason Yan ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 4715bc62dbf9SJason Yan le32_to_cpu(es->s_inodes_count), 4716bc62dbf9SJason Yan ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 4717bc62dbf9SJason Yan return -EINVAL; 4718bc62dbf9SJason Yan } 4719bc62dbf9SJason Yan 4720bc62dbf9SJason Yan return 0; 4721bc62dbf9SJason Yan } 4722bc62dbf9SJason Yan 4723*a4e6a511SJason Yan static void ext4_group_desc_free(struct ext4_sb_info *sbi) 4724*a4e6a511SJason Yan { 4725*a4e6a511SJason Yan struct buffer_head **group_desc; 4726*a4e6a511SJason Yan int i; 4727*a4e6a511SJason Yan 4728*a4e6a511SJason Yan rcu_read_lock(); 4729*a4e6a511SJason Yan group_desc = rcu_dereference(sbi->s_group_desc); 4730*a4e6a511SJason Yan for (i = 0; i < sbi->s_gdb_count; i++) 4731*a4e6a511SJason Yan brelse(group_desc[i]); 4732*a4e6a511SJason Yan kvfree(group_desc); 4733*a4e6a511SJason Yan rcu_read_unlock(); 4734*a4e6a511SJason Yan } 4735*a4e6a511SJason Yan 4736*a4e6a511SJason Yan static int ext4_group_desc_init(struct super_block *sb, 4737*a4e6a511SJason Yan struct ext4_super_block *es, 4738*a4e6a511SJason Yan ext4_fsblk_t logical_sb_block, 4739*a4e6a511SJason Yan ext4_group_t *first_not_zeroed) 4740*a4e6a511SJason Yan { 4741*a4e6a511SJason Yan struct ext4_sb_info *sbi = EXT4_SB(sb); 4742*a4e6a511SJason Yan unsigned int db_count; 4743*a4e6a511SJason Yan ext4_fsblk_t block; 4744*a4e6a511SJason Yan int ret; 4745*a4e6a511SJason Yan int i; 4746*a4e6a511SJason Yan 4747*a4e6a511SJason Yan db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4748*a4e6a511SJason Yan EXT4_DESC_PER_BLOCK(sb); 4749*a4e6a511SJason Yan if (ext4_has_feature_meta_bg(sb)) { 4750*a4e6a511SJason Yan if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 4751*a4e6a511SJason Yan ext4_msg(sb, KERN_WARNING, 4752*a4e6a511SJason Yan "first meta block group too large: %u " 4753*a4e6a511SJason Yan "(group descriptor block count %u)", 4754*a4e6a511SJason Yan le32_to_cpu(es->s_first_meta_bg), db_count); 4755*a4e6a511SJason Yan return -EINVAL; 4756*a4e6a511SJason Yan } 4757*a4e6a511SJason Yan } 4758*a4e6a511SJason Yan rcu_assign_pointer(sbi->s_group_desc, 4759*a4e6a511SJason Yan kvmalloc_array(db_count, 4760*a4e6a511SJason Yan sizeof(struct buffer_head *), 4761*a4e6a511SJason Yan GFP_KERNEL)); 4762*a4e6a511SJason Yan if (sbi->s_group_desc == NULL) { 4763*a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "not enough memory"); 4764*a4e6a511SJason Yan return -ENOMEM; 4765*a4e6a511SJason Yan } 4766*a4e6a511SJason Yan 4767*a4e6a511SJason Yan bgl_lock_init(sbi->s_blockgroup_lock); 4768*a4e6a511SJason Yan 4769*a4e6a511SJason Yan /* Pre-read the descriptors into the buffer cache */ 4770*a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4771*a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4772*a4e6a511SJason Yan ext4_sb_breadahead_unmovable(sb, block); 4773*a4e6a511SJason Yan } 4774*a4e6a511SJason Yan 4775*a4e6a511SJason Yan for (i = 0; i < db_count; i++) { 4776*a4e6a511SJason Yan struct buffer_head *bh; 4777*a4e6a511SJason Yan 4778*a4e6a511SJason Yan block = descriptor_loc(sb, logical_sb_block, i); 4779*a4e6a511SJason Yan bh = ext4_sb_bread_unmovable(sb, block); 4780*a4e6a511SJason Yan if (IS_ERR(bh)) { 4781*a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, 4782*a4e6a511SJason Yan "can't read group descriptor %d", i); 4783*a4e6a511SJason Yan sbi->s_gdb_count = i; 4784*a4e6a511SJason Yan ret = PTR_ERR(bh); 4785*a4e6a511SJason Yan goto out; 4786*a4e6a511SJason Yan } 4787*a4e6a511SJason Yan rcu_read_lock(); 4788*a4e6a511SJason Yan rcu_dereference(sbi->s_group_desc)[i] = bh; 4789*a4e6a511SJason Yan rcu_read_unlock(); 4790*a4e6a511SJason Yan } 4791*a4e6a511SJason Yan sbi->s_gdb_count = db_count; 4792*a4e6a511SJason Yan if (!ext4_check_descriptors(sb, logical_sb_block, first_not_zeroed)) { 4793*a4e6a511SJason Yan ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 4794*a4e6a511SJason Yan ret = -EFSCORRUPTED; 4795*a4e6a511SJason Yan goto out; 4796*a4e6a511SJason Yan } 4797*a4e6a511SJason Yan return 0; 4798*a4e6a511SJason Yan out: 4799*a4e6a511SJason Yan ext4_group_desc_free(sbi); 4800*a4e6a511SJason Yan return ret; 4801*a4e6a511SJason Yan } 4802*a4e6a511SJason Yan 4803960e0ab6SLukas Czerner static int __ext4_fill_super(struct fs_context *fc, struct super_block *sb) 48047edfd85bSLukas Czerner { 4805*a4e6a511SJason Yan struct buffer_head *bh; 4806617ba13bSMingming Cao struct ext4_super_block *es = NULL; 48077edfd85bSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 48087c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 4809617ba13bSMingming Cao ext4_fsblk_t block; 481070bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 4811ac27a0ecSDave Kleikamp unsigned long offset = 0; 4812ac27a0ecSDave Kleikamp struct inode *root; 4813dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 48144a8557b0SJason Yan int blocksize; 48154ec11028STheodore Ts'o unsigned int i; 4816ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 481707aa2ea1SLukas Czerner int err = 0; 4818bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 48197edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 4820960e0ab6SLukas Czerner int silent = fc->sb_flags & SB_SILENT; 4821b237e304SHarshad Shirwadkar 4822b237e304SHarshad Shirwadkar /* Set defaults for the variables that will be set during parsing */ 4823e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) 48247edfd85bSLukas Czerner ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4825ac27a0ecSDave Kleikamp 4826240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 4827f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 48288446fe92SChristoph Hellwig part_stat_read(sb->s_bdev, sectors[STAT_WRITE]); 4829ac27a0ecSDave Kleikamp 483007aa2ea1SLukas Czerner /* -EINVAL is default */ 4831dcc7dae3SCyrill Gorcunov ret = -EINVAL; 4832617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 4833ac27a0ecSDave Kleikamp if (!blocksize) { 4834b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 4835ac27a0ecSDave Kleikamp goto out_fail; 4836ac27a0ecSDave Kleikamp } 4837ac27a0ecSDave Kleikamp 4838ac27a0ecSDave Kleikamp /* 4839617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 4840ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 4841ac27a0ecSDave Kleikamp */ 4842617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 48437edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 484470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4845ac27a0ecSDave Kleikamp } else { 48467edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block; 4847ac27a0ecSDave Kleikamp } 4848ac27a0ecSDave Kleikamp 48498394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 48508394a6abSzhangyi (F) if (IS_ERR(bh)) { 4851b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 48528394a6abSzhangyi (F) ret = PTR_ERR(bh); 4853ac27a0ecSDave Kleikamp goto out_fail; 4854ac27a0ecSDave Kleikamp } 4855ac27a0ecSDave Kleikamp /* 4856ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 4857617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 4858ac27a0ecSDave Kleikamp */ 48592716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4860ac27a0ecSDave Kleikamp sbi->s_es = es; 4861ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 4862a5fc5119SJason Yan if (sb->s_magic != EXT4_SUPER_MAGIC) { 4863a5fc5119SJason Yan if (!silent) 4864a5fc5119SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4865a5fc5119SJason Yan goto failed_mount; 4866a5fc5119SJason Yan } 4867a5fc5119SJason Yan 4868afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 4869ac27a0ecSDave Kleikamp 4870b26458d1SJason Yan err = ext4_init_metadata_csum(sb, es); 4871b26458d1SJason Yan if (err) 4872a5fc5119SJason Yan goto failed_mount; 4873a9c47317SDarrick J. Wong 48745f6d662dSJason Yan ext4_set_def_opts(sb, es); 4875ac27a0ecSDave Kleikamp 487608cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 487708cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 487830773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 487930773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 488030773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 4881ac27a0ecSDave Kleikamp 488251ce6511SLukas Czerner /* 488351ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 488451ce6511SLukas Czerner * no mount option specified. 488551ce6511SLukas Czerner */ 488651ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 488751ce6511SLukas Czerner 4888c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 4889c9200760STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4890c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4891c9200760STheodore Ts'o "Invalid log block size: %u", 4892c9200760STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4893c9200760STheodore Ts'o goto failed_mount; 4894c9200760STheodore Ts'o } 4895c9200760STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4896c9200760STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4897c9200760STheodore Ts'o ext4_msg(sb, KERN_ERR, 4898c9200760STheodore Ts'o "Invalid log cluster size: %u", 4899c9200760STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4900c9200760STheodore Ts'o goto failed_mount; 4901c9200760STheodore Ts'o } 4902c9200760STheodore Ts'o 4903c9200760STheodore Ts'o blocksize = EXT4_MIN_BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 4904626b035bSRitesh Harjani 4905626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 4906626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 4907626b035bSRitesh Harjani 49080e495f7cSJason Yan if (ext4_inode_info_init(sb, es, blocksize)) 49099803387cSTheodore Ts'o goto failed_mount; 49109803387cSTheodore Ts'o 49117edfd85bSLukas Czerner err = parse_apply_sb_mount_options(sb, ctx); 49127edfd85bSLukas Czerner if (err < 0) 49135aee0f8aSTheodore Ts'o goto failed_mount; 49147edfd85bSLukas Czerner 49155a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 49167edfd85bSLukas Czerner 49177edfd85bSLukas Czerner err = ext4_check_opt_consistency(fc, sb); 49187edfd85bSLukas Czerner if (err < 0) 49197edfd85bSLukas Czerner goto failed_mount; 49207edfd85bSLukas Czerner 492185456054SEric Biggers ext4_apply_options(fc, sb); 4922ac27a0ecSDave Kleikamp 492339c135b0SJason Yan if (ext4_encoding_init(sb, es)) 4924c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4925c83ad55eSGabriel Krisman Bertazi 492656889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4927556e0319SHarshad Shirwadkar printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, O_DIRECT and fast_commit support!\n"); 4928781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4929244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 4930556e0319SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 493156889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 493256889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 493356889787STheodore Ts'o "both data=journal and delalloc"); 493456889787STheodore Ts'o goto failed_mount; 493556889787STheodore Ts'o } 4936fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4937923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4938923ae0ffSRoss Zwisler "both data=journal and dax"); 4939923ae0ffSRoss Zwisler goto failed_mount; 4940923ae0ffSRoss Zwisler } 494173b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 494273b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 494373b92a2aSSergey Karamov "encrypted files will use data=ordered " 494473b92a2aSSergey Karamov "instead of data journaling mode"); 494573b92a2aSSergey Karamov } 494656889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 494756889787STheodore Ts'o clear_opt(sb, DELALLOC); 4948001e4a87STejun Heo } else { 4949001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 495056889787STheodore Ts'o } 495156889787STheodore Ts'o 49521751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 49531751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4954ac27a0ecSDave Kleikamp 49551ff20307SJeff Layton /* i_version is always enabled now */ 49561ff20307SJeff Layton sb->s_flags |= SB_I_VERSION; 49571ff20307SJeff Layton 4958d7f3542bSJason Yan if (ext4_check_feature_compatibility(sb, es, silent)) 4959ac27a0ecSDave Kleikamp goto failed_mount; 4960a13fb1a4SEric Sandeen 49615b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 49625b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 49635b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 49645b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 49655b9554dcSTheodore Ts'o goto failed_mount; 49665b9554dcSTheodore Ts'o } 49675b9554dcSTheodore Ts'o 496889b93a7bSChristoph Hellwig if (sbi->s_daxdev) { 49697b0800d0SChristoph Hellwig if (blocksize == PAGE_SIZE) 4970a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 49717b0800d0SChristoph Hellwig else 49727b0800d0SChristoph Hellwig ext4_msg(sb, KERN_ERR, "unsupported blocksize for DAX\n"); 49737b0800d0SChristoph Hellwig } 4974a8ab6d38SIra Weiny 4975fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4976559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4977559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4978559db4c6SRoss Zwisler " that may contain inline data"); 4979361d24d4SEric Sandeen goto failed_mount; 4980559db4c6SRoss Zwisler } 4981a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 498224f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4983361d24d4SEric Sandeen "DAX unsupported by block device."); 4984361d24d4SEric Sandeen goto failed_mount; 498524f3478dSDan Williams } 4986923ae0ffSRoss Zwisler } 4987923ae0ffSRoss Zwisler 4988e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 49896ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 49906ddb2447STheodore Ts'o es->s_encryption_level); 49916ddb2447STheodore Ts'o goto failed_mount; 49926ddb2447STheodore Ts'o } 49936ddb2447STheodore Ts'o 4994ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4995afd09b61SAlexey Makhalov /* 4996afd09b61SAlexey Makhalov * bh must be released before kill_bdev(), otherwise 4997afd09b61SAlexey Makhalov * it won't be freed and its page also. kill_bdev() 4998afd09b61SAlexey Makhalov * is called by sb_set_blocksize(). 4999afd09b61SAlexey Makhalov */ 5000afd09b61SAlexey Makhalov brelse(bh); 5001ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 5002ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 5003b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 5004ce40733cSAneesh Kumar K.V blocksize); 5005afd09b61SAlexey Makhalov bh = NULL; 5006ac27a0ecSDave Kleikamp goto failed_mount; 5007ac27a0ecSDave Kleikamp } 5008ac27a0ecSDave Kleikamp 50097edfd85bSLukas Czerner logical_sb_block = sbi->s_sb_block * EXT4_MIN_BLOCK_SIZE; 501070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 50118394a6abSzhangyi (F) bh = ext4_sb_bread_unmovable(sb, logical_sb_block); 50128394a6abSzhangyi (F) if (IS_ERR(bh)) { 5013b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5014b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 50158394a6abSzhangyi (F) ret = PTR_ERR(bh); 50168394a6abSzhangyi (F) bh = NULL; 5017ac27a0ecSDave Kleikamp goto failed_mount; 5018ac27a0ecSDave Kleikamp } 50192716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 5020ac27a0ecSDave Kleikamp sbi->s_es = es; 5021617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 5022b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5023b31e1552SEric Sandeen "Magic mismatch, very weird!"); 5024ac27a0ecSDave Kleikamp goto failed_mount; 5025ac27a0ecSDave Kleikamp } 5026ac27a0ecSDave Kleikamp } 5027ac27a0ecSDave Kleikamp 5028e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 5029f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 5030f287a1a5STheodore Ts'o has_huge_files); 5031f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 5032ac27a0ecSDave Kleikamp 50330d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 5034e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 50358fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 50360d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 5037d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 5038b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5039b31e1552SEric Sandeen "unsupported descriptor size %lu", 50400d1ee42fSAlexandre Ratchov sbi->s_desc_size); 50410d1ee42fSAlexandre Ratchov goto failed_mount; 50420d1ee42fSAlexandre Ratchov } 50430d1ee42fSAlexandre Ratchov } else 50440d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 50450b8e58a1SAndreas Dilger 5046ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 5047ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 50480b8e58a1SAndreas Dilger 5049617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 5050a5fc5119SJason Yan if (sbi->s_inodes_per_block == 0 || sbi->s_blocks_per_group == 0) { 5051a5fc5119SJason Yan if (!silent) 5052a5fc5119SJason Yan ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 5053a5fc5119SJason Yan goto failed_mount; 5054a5fc5119SJason Yan } 5055cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 5056cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 5057cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 5058b9c538daSJosh Triplett sbi->s_inodes_per_group); 5059cd6bb35bSTheodore Ts'o goto failed_mount; 5060cd6bb35bSTheodore Ts'o } 5061ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 5062ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 50630d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 5064ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 5065c878bea3STheodore Ts'o sbi->s_mount_state = le16_to_cpu(es->s_state) & ~EXT4_FC_REPLAY; 5066e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 5067e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 50680b8e58a1SAndreas Dilger 5069ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 5070ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 5071ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 5072e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 5073f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 5074f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 5075f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 5076f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 5077f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 5078bc98a42cSDavid Howells if (!sb_rdonly(sb)) 507923301410STheodore Ts'o es->s_flags |= 508023301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 5081f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 5082f99b2589STheodore Ts'o #else 5083bc98a42cSDavid Howells if (!sb_rdonly(sb)) 508423301410STheodore Ts'o es->s_flags |= 508523301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 5086f99b2589STheodore Ts'o #endif 5087f99b2589STheodore Ts'o } 508823301410STheodore Ts'o } 5089ac27a0ecSDave Kleikamp 50904a8557b0SJason Yan if (ext4_handle_clustersize(sb, blocksize)) 5091281b5995STheodore Ts'o goto failed_mount; 5092960fd856STheodore Ts'o 5093bf43d84bSEric Sandeen /* 5094bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 5095bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 5096bf43d84bSEric Sandeen */ 50975a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 509830ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 50995a9ae68aSDarrick J. Wong if (err) { 5100b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 5101bf43d84bSEric Sandeen " too large to mount safely on this system"); 5102ac27a0ecSDave Kleikamp goto failed_mount; 5103ac27a0ecSDave Kleikamp } 5104ac27a0ecSDave Kleikamp 5105bc62dbf9SJason Yan if (ext4_geometry_check(sb, es)) 51060f2ddca6SFrom: Thiemo Nagel goto failed_mount; 51070f2ddca6SFrom: Thiemo Nagel 5108*a4e6a511SJason Yan err = ext4_group_desc_init(sb, es, logical_sb_block, &first_not_zeroed); 5109*a4e6a511SJason Yan if (err) 51103a4b77cdSEryu Guan goto failed_mount; 5111772cb7c8SJose R. Santos 5112235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 5113c92dc856SJan Kara spin_lock_init(&sbi->s_error_lock); 5114c92dc856SJan Kara INIT_WORK(&sbi->s_error_work, flush_stashed_error_work); 511504496411STao Ma 5116a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 5117eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 5118ce7e010aSTheodore Ts'o goto failed_mount3; 5119ce7e010aSTheodore Ts'o 5120c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 512167a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 5122c9de560dSAlex Tomas 5123f9ae9cf5STheodore Ts'o /* 5124f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 5125f9ae9cf5STheodore Ts'o */ 5126f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 5127617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 5128617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 5129643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 5130a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 5131ffcc4182SEric Biggers #endif 5132c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 5133c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 5134c93d8f88SEric Biggers #endif 5135ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5136617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 5137e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 51381fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 5139262b4662SJan Kara else 5140262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 5141689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 5142ac27a0ecSDave Kleikamp #endif 514385787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 5144f2fa2ffcSAneesh Kumar K.V 5145ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 51463b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 5147ac27a0ecSDave Kleikamp 5148f7314a67SJason Yan ext4_fast_commit_init(sb); 5149aa75f4d3SHarshad Shirwadkar 5150ac27a0ecSDave Kleikamp sb->s_root = NULL; 5151ac27a0ecSDave Kleikamp 5152ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 515302f310fcSJan Kara ext4_has_feature_orphan_present(sb) || 5154e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 5155ac27a0ecSDave Kleikamp 5156bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 5157c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 515850460fe8SDarrick J. Wong goto failed_mount3a; 5159c5e06d10SJohann Lombardi 5160ac27a0ecSDave Kleikamp /* 5161ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 5162ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 5163ac27a0ecSDave Kleikamp */ 5164e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 51657edfd85bSLukas Czerner err = ext4_load_journal(sb, es, ctx->journal_devnum); 51664753d8a2STheodore Ts'o if (err) 516750460fe8SDarrick J. Wong goto failed_mount3a; 5168bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 5169e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 5170b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 5171b31e1552SEric Sandeen "suppressed and not mounted read-only"); 517243bd6f1bSJason Yan goto failed_mount3a; 5173ac27a0ecSDave Kleikamp } else { 51741e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 51751e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 51761e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51771e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 517843bd6f1bSJason Yan goto failed_mount3a; 51791e381f60SDmitry Monakhov } 51801e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 51811e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51821e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 518343bd6f1bSJason Yan goto failed_mount3a; 51841e381f60SDmitry Monakhov } 51851e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 51861e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51871e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 51881e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 518943bd6f1bSJason Yan goto failed_mount3a; 51901e381f60SDmitry Monakhov } 51911e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 51921e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 51931e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 51941e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 519543bd6f1bSJason Yan goto failed_mount3a; 51961e381f60SDmitry Monakhov } 519750b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 51981e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 5199fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 5200995a3ed6SHarshad Shirwadkar clear_opt2(sb, JOURNAL_FAST_COMMIT); 52010390131bSFrank Mayhar sbi->s_journal = NULL; 52020390131bSFrank Mayhar needs_recovery = 0; 52030390131bSFrank Mayhar goto no_journal; 5204ac27a0ecSDave Kleikamp } 5205ac27a0ecSDave Kleikamp 5206e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 5207eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5208eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 5209b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 5210744692dcSJiaying Zhang goto failed_mount_wq; 5211eb40a09cSJose R. Santos } 5212eb40a09cSJose R. Santos 521325ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 521425ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 521525ed6e8aSDarrick J. Wong "feature set"); 521625ed6e8aSDarrick J. Wong goto failed_mount_wq; 5217d4da6c9cSLinus Torvalds } 5218818d276cSGirish Shilamkar 5219a1e5e465SHarshad Shirwadkar if (test_opt2(sb, JOURNAL_FAST_COMMIT) && 5220a1e5e465SHarshad Shirwadkar !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 5221a1e5e465SHarshad Shirwadkar JBD2_FEATURE_INCOMPAT_FAST_COMMIT)) { 5222a1e5e465SHarshad Shirwadkar ext4_msg(sb, KERN_ERR, 5223a1e5e465SHarshad Shirwadkar "Failed to set fast commit journal feature"); 5224a1e5e465SHarshad Shirwadkar goto failed_mount_wq; 5225a1e5e465SHarshad Shirwadkar } 5226a1e5e465SHarshad Shirwadkar 5227ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 5228ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 5229ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 5230ac27a0ecSDave Kleikamp case 0: 5231ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 523263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 523363f57933SAndrew Morton * cope, else JOURNAL_DATA 523463f57933SAndrew Morton */ 5235dab291afSMingming Cao if (jbd2_journal_check_available_features 523627f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5237fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 523827f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 523927f394a7STyson Nottingham } else { 5240fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 524127f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 524227f394a7STyson Nottingham } 5243ac27a0ecSDave Kleikamp break; 5244ac27a0ecSDave Kleikamp 5245617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 5246617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 5247dab291afSMingming Cao if (!jbd2_journal_check_available_features 5248dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 5249b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 5250b31e1552SEric Sandeen "requested data journaling mode"); 5251744692dcSJiaying Zhang goto failed_mount_wq; 5252ac27a0ecSDave Kleikamp } 52535a150bdeSGustavo A. R. Silva break; 5254ac27a0ecSDave Kleikamp default: 5255ac27a0ecSDave Kleikamp break; 5256ac27a0ecSDave Kleikamp } 5257ab04df78SJan Kara 5258ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 5259ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5260ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5261ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5262ab04df78SJan Kara goto failed_mount_wq; 5263ab04df78SJan Kara } 5264ab04df78SJan Kara 52657edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 5266ac27a0ecSDave Kleikamp 5267342af94eSMauricio Faria de Oliveira sbi->s_journal->j_submit_inode_data_buffers = 5268afb585a9SMauricio Faria de Oliveira ext4_journal_submit_inode_data_buffers; 5269342af94eSMauricio Faria de Oliveira sbi->s_journal->j_finish_inode_data_buffers = 5270afb585a9SMauricio Faria de Oliveira ext4_journal_finish_inode_data_buffers; 527118aadd47SBobi Jam 5272ce7e010aSTheodore Ts'o no_journal: 5273cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 527447387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 527547387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 5276cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 5277cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 52789c191f70ST Makphaibulchoke goto failed_mount_wq; 52799c191f70ST Makphaibulchoke } 52809c191f70ST Makphaibulchoke 5281dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 5282dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 5283dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 5284dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 5285dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 5286dec214d0STahsin Erdogan goto failed_mount_wq; 5287dec214d0STahsin Erdogan } 5288dec214d0STahsin Erdogan } 5289cdb7ee4cSTahsin Erdogan } 5290dec214d0STahsin Erdogan 5291c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 5292c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 5293c93d8f88SEric Biggers goto failed_mount_wq; 5294c93d8f88SEric Biggers } 5295c93d8f88SEric Biggers 5296fd89d5f2STejun Heo /* 5297952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 5298952fc18eSTheodore Ts'o * superblock if present. 5299952fc18eSTheodore Ts'o */ 5300952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 530185d825dbSTheodore Ts'o /* ignore the precalculated value if it is ridiculous */ 530285d825dbSTheodore Ts'o if (sbi->s_overhead > ext4_blocks_count(es)) 530385d825dbSTheodore Ts'o sbi->s_overhead = 0; 530485d825dbSTheodore Ts'o /* 530585d825dbSTheodore Ts'o * If the bigalloc feature is not enabled recalculating the 530685d825dbSTheodore Ts'o * overhead doesn't take long, so we might as well just redo 530785d825dbSTheodore Ts'o * it to make sure we are using the correct value. 530885d825dbSTheodore Ts'o */ 530985d825dbSTheodore Ts'o if (!ext4_has_feature_bigalloc(sb)) 531085d825dbSTheodore Ts'o sbi->s_overhead = 0; 531185d825dbSTheodore Ts'o if (sbi->s_overhead == 0) { 531207aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 531307aa2ea1SLukas Czerner if (err) 5314952fc18eSTheodore Ts'o goto failed_mount_wq; 5315952fc18eSTheodore Ts'o } 5316952fc18eSTheodore Ts'o 5317952fc18eSTheodore Ts'o /* 5318fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 5319fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 5320fd89d5f2STejun Heo */ 53212e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 53222e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 53232e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 53242e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 532507aa2ea1SLukas Czerner ret = -ENOMEM; 53262e8fa54eSJan Kara goto failed_mount4; 53272e8fa54eSJan Kara } 53282e8fa54eSJan Kara 5329ac27a0ecSDave Kleikamp /* 5330dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 5331ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 5332ac27a0ecSDave Kleikamp */ 5333ac27a0ecSDave Kleikamp 53348a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 53351d1fe1eeSDavid Howells if (IS_ERR(root)) { 5336b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 53371d1fe1eeSDavid Howells ret = PTR_ERR(root); 533832a9bb57SManish Katiyar root = NULL; 5339ac27a0ecSDave Kleikamp goto failed_mount4; 5340ac27a0ecSDave Kleikamp } 5341ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 5342b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 534394bf608aSAl Viro iput(root); 5344ac27a0ecSDave Kleikamp goto failed_mount4; 5345ac27a0ecSDave Kleikamp } 5346b886ee3eSGabriel Krisman Bertazi 534748fde701SAl Viro sb->s_root = d_make_root(root); 53481d1fe1eeSDavid Howells if (!sb->s_root) { 5349b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 53501d1fe1eeSDavid Howells ret = -ENOMEM; 53511d1fe1eeSDavid Howells goto failed_mount4; 53521d1fe1eeSDavid Howells } 5353ac27a0ecSDave Kleikamp 5354c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 5355c89128a0SJaegeuk Kim if (ret == -EROFS) { 53561751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5357c89128a0SJaegeuk Kim ret = 0; 5358c89128a0SJaegeuk Kim } else if (ret) 5359c89128a0SJaegeuk Kim goto failed_mount4a; 5360ef7f3835SKalpak Shah 5361b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 536227dd4385SLukas Czerner 53630f5bde1dSJan Kara if (test_opt(sb, BLOCK_VALIDITY)) { 53646fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 53656fd058f7STheodore Ts'o if (err) { 5366b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 5367fbe845ddSCurt Wohlgemuth "zone (%d)", err); 5368f9ae9cf5STheodore Ts'o goto failed_mount4a; 5369f9ae9cf5STheodore Ts'o } 53700f5bde1dSJan Kara } 53718016e29fSHarshad Shirwadkar ext4_fc_replay_cleanup(sb); 5372f9ae9cf5STheodore Ts'o 5373f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 5374196e402aSHarshad Shirwadkar 5375196e402aSHarshad Shirwadkar /* 5376196e402aSHarshad Shirwadkar * Enable optimize_scan if number of groups is > threshold. This can be 5377196e402aSHarshad Shirwadkar * turned off by passing "mb_optimize_scan=0". This can also be 5378196e402aSHarshad Shirwadkar * turned on forcefully by passing "mb_optimize_scan=1". 5379196e402aSHarshad Shirwadkar */ 538027b38686SOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_mb_optimize_scan)) { 538127b38686SOjaswin Mujoo if (sbi->s_groups_count >= MB_DEFAULT_LINEAR_SCAN_THRESHOLD) 5382196e402aSHarshad Shirwadkar set_opt2(sb, MB_OPTIMIZE_SCAN); 538327b38686SOjaswin Mujoo else 5384196e402aSHarshad Shirwadkar clear_opt2(sb, MB_OPTIMIZE_SCAN); 538527b38686SOjaswin Mujoo } 5386196e402aSHarshad Shirwadkar 5387f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 5388f9ae9cf5STheodore Ts'o if (err) { 5389f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 5390f9ae9cf5STheodore Ts'o err); 5391dcf2d804STao Ma goto failed_mount5; 5392c2774d84SAneesh Kumar K.V } 5393c2774d84SAneesh Kumar K.V 5394027f14f5STheodore Ts'o /* 5395027f14f5STheodore Ts'o * We can only set up the journal commit callback once 5396027f14f5STheodore Ts'o * mballoc is initialized 5397027f14f5STheodore Ts'o */ 5398027f14f5STheodore Ts'o if (sbi->s_journal) 5399027f14f5STheodore Ts'o sbi->s_journal->j_commit_callback = 5400027f14f5STheodore Ts'o ext4_journal_commit_callback; 5401027f14f5STheodore Ts'o 5402d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 5403d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 5404d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 5405908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 5406908c7f19STejun Heo GFP_KERNEL); 5407d5e03cbbSTheodore Ts'o if (!err) { 5408d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 5409d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 5410908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 5411908c7f19STejun Heo GFP_KERNEL); 5412d5e03cbbSTheodore Ts'o } 5413d5e03cbbSTheodore Ts'o if (!err) 5414d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 5415908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 5416d5e03cbbSTheodore Ts'o if (!err) 5417908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 5418908c7f19STejun Heo GFP_KERNEL); 5419c8585c6fSDaeho Jeong if (!err) 5420efc61345SEric Whitney err = percpu_counter_init(&sbi->s_sra_exceeded_retry_limit, 0, 5421efc61345SEric Whitney GFP_KERNEL); 5422efc61345SEric Whitney if (!err) 5423bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 5424c8585c6fSDaeho Jeong 5425d5e03cbbSTheodore Ts'o if (err) { 5426d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 5427d5e03cbbSTheodore Ts'o goto failed_mount6; 5428d5e03cbbSTheodore Ts'o } 5429d5e03cbbSTheodore Ts'o 5430e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 5431d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 5432d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 5433d5e03cbbSTheodore Ts'o "unable to initialize " 5434d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 54358f6840c4SYang Yingliang ret = -ENOMEM; 5436d5e03cbbSTheodore Ts'o goto failed_mount6; 5437d5e03cbbSTheodore Ts'o } 5438d5e03cbbSTheodore Ts'o 5439bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 5440bfff6873SLukas Czerner if (err) 5441dcf2d804STao Ma goto failed_mount6; 5442bfff6873SLukas Czerner 5443b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 5444dcf2d804STao Ma if (err) 5445dcf2d804STao Ma goto failed_mount7; 54463197ebdbSTheodore Ts'o 544702f310fcSJan Kara err = ext4_init_orphan_info(sb); 544802f310fcSJan Kara if (err) 544902f310fcSJan Kara goto failed_mount8; 54509b2ff357SJan Kara #ifdef CONFIG_QUOTA 54519b2ff357SJan Kara /* Enable quota usage during mount. */ 5452bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 54539b2ff357SJan Kara err = ext4_enable_quotas(sb); 54549b2ff357SJan Kara if (err) 545502f310fcSJan Kara goto failed_mount9; 54569b2ff357SJan Kara } 54579b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 54589b2ff357SJan Kara 5459bc71726cSzhangyi (F) /* 5460bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 5461bc71726cSzhangyi (F) * used to detect the metadata async write error. 5462bc71726cSzhangyi (F) */ 5463bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 5464bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5465bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5466bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 5467617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 5468617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 5469617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 54709b6641ddSYe Bin /* 54719b6641ddSYe Bin * Update the checksum after updating free space/inode counters and 54729b6641ddSYe Bin * ext4_orphan_cleanup. Otherwise the superblock can have an incorrect 54739b6641ddSYe Bin * checksum in the buffer cache until it is written out and 54749b6641ddSYe Bin * e2fsprogs programs trying to open a file system immediately 54759b6641ddSYe Bin * after it is mounted can fail. 54769b6641ddSYe Bin */ 54779b6641ddSYe Bin ext4_superblock_csum_set(sb); 54780390131bSFrank Mayhar if (needs_recovery) { 5479b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 548011215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 548111215630SJan Kara if (err) 548202f310fcSJan Kara goto failed_mount9; 54830390131bSFrank Mayhar } 54840390131bSFrank Mayhar 548570200574SChristoph Hellwig if (test_opt(sb, DISCARD) && !bdev_max_discard_sectors(sb->s_bdev)) 548679add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 548770200574SChristoph Hellwig "mounting with \"discard\" option, but the device does not support discard"); 548879add3a3SLukas Czerner 548966e61a9eSTheodore Ts'o if (es->s_error_count) 549066e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 5491ac27a0ecSDave Kleikamp 5492efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 5493efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 5494efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 5495efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 54961cf006edSDmitry Monakhov atomic_set(&sbi->s_warning_count, 0); 54971cf006edSDmitry Monakhov atomic_set(&sbi->s_msg_count, 0); 5498efbed4dcSTheodore Ts'o 5499ac27a0ecSDave Kleikamp return 0; 5500ac27a0ecSDave Kleikamp 550102f310fcSJan Kara failed_mount9: 550202f310fcSJan Kara ext4_release_orphan_info(sb); 550372ba7450STheodore Ts'o failed_mount8: 5504ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 5505cb8d53d2SEric Biggers kobject_put(&sbi->s_kobj); 5506dcf2d804STao Ma failed_mount7: 5507dcf2d804STao Ma ext4_unregister_li_request(sb); 5508dcf2d804STao Ma failed_mount6: 5509f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 55107c990728SSuraj Jitindar Singh rcu_read_lock(); 55117c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 55127c990728SSuraj Jitindar Singh if (flex_groups) { 55137c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 55147c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 55157c990728SSuraj Jitindar Singh kvfree(flex_groups); 55167c990728SSuraj Jitindar Singh } 55177c990728SSuraj Jitindar Singh rcu_read_unlock(); 5518d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 5519d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 5520d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 5521d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 5522efc61345SEric Whitney percpu_counter_destroy(&sbi->s_sra_exceeded_retry_limit); 5523bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 552400764937SAzat Khuzhin failed_mount5: 5525f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 5526f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 5527f9ae9cf5STheodore Ts'o failed_mount4a: 552894bf608aSAl Viro dput(sb->s_root); 552932a9bb57SManish Katiyar sb->s_root = NULL; 553094bf608aSAl Viro failed_mount4: 5531b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 55322e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 55332e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 55344c0425ffSMingming Cao failed_mount_wq: 5535dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 5536dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 553750c15df6SChengguang Xu 553847387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 553947387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 554050c15df6SChengguang Xu 55410390131bSFrank Mayhar if (sbi->s_journal) { 5542bb9464e0Syangerkun /* flush s_error_work before journal destroy. */ 5543bb9464e0Syangerkun flush_work(&sbi->s_error_work); 5544dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 554547b4a50bSJan Kara sbi->s_journal = NULL; 55460390131bSFrank Mayhar } 554750460fe8SDarrick J. Wong failed_mount3a: 5548d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 5549eb68d0e2SZheng Liu failed_mount3: 5550bb9464e0Syangerkun /* flush s_error_work before sbi destroy */ 5551c92dc856SJan Kara flush_work(&sbi->s_error_work); 55522a4ae3bcSJan Kara del_timer_sync(&sbi->s_err_report); 5553618f0031SPavel Skripkin ext4_stop_mmpd(sbi); 5554*a4e6a511SJason Yan ext4_group_desc_free(sbi); 5555ac27a0ecSDave Kleikamp failed_mount: 55560441984aSDarrick J. Wong if (sbi->s_chksum_driver) 55570441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 5558c83ad55eSGabriel Krisman Bertazi 55595298d4bfSChristoph Hellwig #if IS_ENABLED(CONFIG_UNICODE) 5560f8f4acb6SDaniel Rosenberg utf8_unload(sb->s_encoding); 5561c83ad55eSGabriel Krisman Bertazi #endif 5562c83ad55eSGabriel Krisman Bertazi 5563ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5564a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 55650ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 5566ac27a0ecSDave Kleikamp #endif 5567ac4acb1fSEric Biggers fscrypt_free_dummy_policy(&sbi->s_dummy_enc_policy); 5568afd09b61SAlexey Makhalov /* ext4_blkdev_remove() calls kill_bdev(), release bh before it. */ 5569ac27a0ecSDave Kleikamp brelse(bh); 5570afd09b61SAlexey Makhalov ext4_blkdev_remove(sbi); 5571ac27a0ecSDave Kleikamp out_fail: 5572ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 557307aa2ea1SLukas Czerner return err ? err : ret; 5574ac27a0ecSDave Kleikamp } 5575ac27a0ecSDave Kleikamp 5576cebe85d5SLukas Czerner static int ext4_fill_super(struct super_block *sb, struct fs_context *fc) 55777edfd85bSLukas Czerner { 5578cebe85d5SLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 55797edfd85bSLukas Czerner struct ext4_sb_info *sbi; 55807edfd85bSLukas Czerner const char *descr; 5581cebe85d5SLukas Czerner int ret; 55827edfd85bSLukas Czerner 5583cebe85d5SLukas Czerner sbi = ext4_alloc_sbi(sb); 5584cebe85d5SLukas Czerner if (!sbi) 55857c268d4cSLukas Czerner return -ENOMEM; 5586cebe85d5SLukas Czerner 5587cebe85d5SLukas Czerner fc->s_fs_info = sbi; 55887edfd85bSLukas Czerner 55897edfd85bSLukas Czerner /* Cleanup superblock name */ 55907edfd85bSLukas Czerner strreplace(sb->s_id, '/', '!'); 55917edfd85bSLukas Czerner 55927edfd85bSLukas Czerner sbi->s_sb_block = 1; /* Default super block location */ 5593cebe85d5SLukas Czerner if (ctx->spec & EXT4_SPEC_s_sb_block) 5594cebe85d5SLukas Czerner sbi->s_sb_block = ctx->s_sb_block; 55957edfd85bSLukas Czerner 5596960e0ab6SLukas Czerner ret = __ext4_fill_super(fc, sb); 55977edfd85bSLukas Czerner if (ret < 0) 55987edfd85bSLukas Czerner goto free_sbi; 55997edfd85bSLukas Czerner 5600cebe85d5SLukas Czerner if (sbi->s_journal) { 56017edfd85bSLukas Czerner if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 56027edfd85bSLukas Czerner descr = " journalled data mode"; 56037edfd85bSLukas Czerner else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 56047edfd85bSLukas Czerner descr = " ordered data mode"; 56057edfd85bSLukas Czerner else 56067edfd85bSLukas Czerner descr = " writeback data mode"; 56077edfd85bSLukas Czerner } else 56087edfd85bSLukas Czerner descr = "out journal"; 56097edfd85bSLukas Czerner 56107edfd85bSLukas Czerner if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 56117edfd85bSLukas Czerner ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 5612cebe85d5SLukas Czerner "Quota mode: %s.", descr, ext4_quota_mode(sb)); 56137edfd85bSLukas Czerner 5614eb705421STheodore Ts'o /* Update the s_overhead_clusters if necessary */ 5615827891a3STheodore Ts'o ext4_update_overhead(sb, false); 56167edfd85bSLukas Czerner return 0; 5617cebe85d5SLukas Czerner 56187edfd85bSLukas Czerner free_sbi: 56197edfd85bSLukas Czerner ext4_free_sbi(sbi); 5620cebe85d5SLukas Czerner fc->s_fs_info = NULL; 56217edfd85bSLukas Czerner return ret; 56227edfd85bSLukas Czerner } 56237edfd85bSLukas Czerner 5624cebe85d5SLukas Czerner static int ext4_get_tree(struct fs_context *fc) 5625cebe85d5SLukas Czerner { 5626cebe85d5SLukas Czerner return get_tree_bdev(fc, ext4_fill_super); 5627cebe85d5SLukas Czerner } 5628cebe85d5SLukas Czerner 5629ac27a0ecSDave Kleikamp /* 5630ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 5631ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 5632ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 5633ac27a0ecSDave Kleikamp */ 5634617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 5635ac27a0ecSDave Kleikamp { 5636617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5637ac27a0ecSDave Kleikamp 5638ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 563930773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 564030773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 56416866d7b3SHarshad Shirwadkar ext4_fc_init(sb, journal); 5642ac27a0ecSDave Kleikamp 5643a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 5644ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 5645dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 5646ac27a0ecSDave Kleikamp else 5647dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 56485bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 56495bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 56505bf5683aSHidehiro Kawai else 56515bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 5652a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 5653ac27a0ecSDave Kleikamp } 5654ac27a0ecSDave Kleikamp 5655c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 5656ac27a0ecSDave Kleikamp unsigned int journal_inum) 5657ac27a0ecSDave Kleikamp { 5658ac27a0ecSDave Kleikamp struct inode *journal_inode; 5659ac27a0ecSDave Kleikamp 5660c6cb7e77SEric Whitney /* 5661c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 5662c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 5663c6cb7e77SEric Whitney * will try to delete it. 5664c6cb7e77SEric Whitney */ 56658a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 56661d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 5667b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 5668ac27a0ecSDave Kleikamp return NULL; 5669ac27a0ecSDave Kleikamp } 5670ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 5671ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 5672ac27a0ecSDave Kleikamp iput(journal_inode); 5673b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 5674ac27a0ecSDave Kleikamp return NULL; 5675ac27a0ecSDave Kleikamp } 5676ac27a0ecSDave Kleikamp 56774978c659SJan Kara ext4_debug("Journal inode found at %p: %lld bytes\n", 5678ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 56791d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 5680b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 5681ac27a0ecSDave Kleikamp iput(journal_inode); 5682ac27a0ecSDave Kleikamp return NULL; 5683ac27a0ecSDave Kleikamp } 5684c6cb7e77SEric Whitney return journal_inode; 5685c6cb7e77SEric Whitney } 5686c6cb7e77SEric Whitney 5687c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 5688c6cb7e77SEric Whitney unsigned int journal_inum) 5689c6cb7e77SEric Whitney { 5690c6cb7e77SEric Whitney struct inode *journal_inode; 5691c6cb7e77SEric Whitney journal_t *journal; 5692c6cb7e77SEric Whitney 569311215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 569411215630SJan Kara return NULL; 5695c6cb7e77SEric Whitney 5696c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 5697c6cb7e77SEric Whitney if (!journal_inode) 5698c6cb7e77SEric Whitney return NULL; 5699ac27a0ecSDave Kleikamp 5700dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 5701ac27a0ecSDave Kleikamp if (!journal) { 5702b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 5703ac27a0ecSDave Kleikamp iput(journal_inode); 5704ac27a0ecSDave Kleikamp return NULL; 5705ac27a0ecSDave Kleikamp } 5706ac27a0ecSDave Kleikamp journal->j_private = sb; 5707617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5708ac27a0ecSDave Kleikamp return journal; 5709ac27a0ecSDave Kleikamp } 5710ac27a0ecSDave Kleikamp 5711617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 5712ac27a0ecSDave Kleikamp dev_t j_dev) 5713ac27a0ecSDave Kleikamp { 5714ac27a0ecSDave Kleikamp struct buffer_head *bh; 5715ac27a0ecSDave Kleikamp journal_t *journal; 5716617ba13bSMingming Cao ext4_fsblk_t start; 5717617ba13bSMingming Cao ext4_fsblk_t len; 5718ac27a0ecSDave Kleikamp int hblock, blocksize; 5719617ba13bSMingming Cao ext4_fsblk_t sb_block; 5720ac27a0ecSDave Kleikamp unsigned long offset; 5721617ba13bSMingming Cao struct ext4_super_block *es; 5722ac27a0ecSDave Kleikamp struct block_device *bdev; 5723ac27a0ecSDave Kleikamp 572411215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 572511215630SJan Kara return NULL; 57260390131bSFrank Mayhar 5727b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5728ac27a0ecSDave Kleikamp if (bdev == NULL) 5729ac27a0ecSDave Kleikamp return NULL; 5730ac27a0ecSDave Kleikamp 5731ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5732e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5733ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5734b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5735b31e1552SEric Sandeen "blocksize too small for journal device"); 5736ac27a0ecSDave Kleikamp goto out_bdev; 5737ac27a0ecSDave Kleikamp } 5738ac27a0ecSDave Kleikamp 5739617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5740617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5741ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5742ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5743b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5744b31e1552SEric Sandeen "external journal"); 5745ac27a0ecSDave Kleikamp goto out_bdev; 5746ac27a0ecSDave Kleikamp } 5747ac27a0ecSDave Kleikamp 57482716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5749617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5750ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5751617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5752b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5753b31e1552SEric Sandeen "bad superblock"); 5754ac27a0ecSDave Kleikamp brelse(bh); 5755ac27a0ecSDave Kleikamp goto out_bdev; 5756ac27a0ecSDave Kleikamp } 5757ac27a0ecSDave Kleikamp 5758df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5759df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5760df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5761df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5762df4763beSDarrick J. Wong "corrupt superblock"); 5763df4763beSDarrick J. Wong brelse(bh); 5764df4763beSDarrick J. Wong goto out_bdev; 5765df4763beSDarrick J. Wong } 5766df4763beSDarrick J. Wong 5767617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5768b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5769ac27a0ecSDave Kleikamp brelse(bh); 5770ac27a0ecSDave Kleikamp goto out_bdev; 5771ac27a0ecSDave Kleikamp } 5772ac27a0ecSDave Kleikamp 5773bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5774ac27a0ecSDave Kleikamp start = sb_block + 1; 5775ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5776ac27a0ecSDave Kleikamp 5777dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5778ac27a0ecSDave Kleikamp start, len, blocksize); 5779ac27a0ecSDave Kleikamp if (!journal) { 5780b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5781ac27a0ecSDave Kleikamp goto out_bdev; 5782ac27a0ecSDave Kleikamp } 5783ac27a0ecSDave Kleikamp journal->j_private = sb; 57842d069c08Szhangyi (F) if (ext4_read_bh_lock(journal->j_sb_buffer, REQ_META | REQ_PRIO, true)) { 5785b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5786ac27a0ecSDave Kleikamp goto out_journal; 5787ac27a0ecSDave Kleikamp } 5788ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5789b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5790b31e1552SEric Sandeen "user (unsupported) - %d", 5791ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5792ac27a0ecSDave Kleikamp goto out_journal; 5793ac27a0ecSDave Kleikamp } 5794ee7ed3aaSChunguang Xu EXT4_SB(sb)->s_journal_bdev = bdev; 5795617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5796ac27a0ecSDave Kleikamp return journal; 57970b8e58a1SAndreas Dilger 5798ac27a0ecSDave Kleikamp out_journal: 5799dab291afSMingming Cao jbd2_journal_destroy(journal); 5800ac27a0ecSDave Kleikamp out_bdev: 5801617ba13bSMingming Cao ext4_blkdev_put(bdev); 5802ac27a0ecSDave Kleikamp return NULL; 5803ac27a0ecSDave Kleikamp } 5804ac27a0ecSDave Kleikamp 5805617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5806617ba13bSMingming Cao struct ext4_super_block *es, 5807ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5808ac27a0ecSDave Kleikamp { 5809ac27a0ecSDave Kleikamp journal_t *journal; 5810ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5811ac27a0ecSDave Kleikamp dev_t journal_dev; 5812ac27a0ecSDave Kleikamp int err = 0; 5813ac27a0ecSDave Kleikamp int really_read_only; 5814273108faSLukas Czerner int journal_dev_ro; 5815ac27a0ecSDave Kleikamp 581611215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 581711215630SJan Kara return -EFSCORRUPTED; 58180390131bSFrank Mayhar 5819ac27a0ecSDave Kleikamp if (journal_devnum && 5820ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5821b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5822b31e1552SEric Sandeen "numbers have changed"); 5823ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5824ac27a0ecSDave Kleikamp } else 5825ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5826ac27a0ecSDave Kleikamp 5827273108faSLukas Czerner if (journal_inum && journal_dev) { 5828273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5829273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5830273108faSLukas Czerner return -EINVAL; 5831273108faSLukas Czerner } 5832273108faSLukas Czerner 5833273108faSLukas Czerner if (journal_inum) { 5834273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5835273108faSLukas Czerner if (!journal) 5836273108faSLukas Czerner return -EINVAL; 5837273108faSLukas Czerner } else { 5838273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5839273108faSLukas Czerner if (!journal) 5840273108faSLukas Czerner return -EINVAL; 5841273108faSLukas Czerner } 5842273108faSLukas Czerner 5843273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5844273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5845273108faSLukas Czerner 5846273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5847273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5848273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5849273108faSLukas Czerner err = -EROFS; 5850273108faSLukas Czerner goto err_out; 5851273108faSLukas Czerner } 5852ac27a0ecSDave Kleikamp 5853ac27a0ecSDave Kleikamp /* 5854ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5855ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5856ac27a0ecSDave Kleikamp * can get read-write access to the device. 5857ac27a0ecSDave Kleikamp */ 5858e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5859bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5860b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5861b31e1552SEric Sandeen "required on readonly filesystem"); 5862ac27a0ecSDave Kleikamp if (really_read_only) { 5863b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5864d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5865d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5866273108faSLukas Czerner err = -EROFS; 5867273108faSLukas Czerner goto err_out; 5868ac27a0ecSDave Kleikamp } 5869b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5870b31e1552SEric Sandeen "be enabled during recovery"); 5871ac27a0ecSDave Kleikamp } 5872ac27a0ecSDave Kleikamp } 5873ac27a0ecSDave Kleikamp 587490576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5875b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 58764776004fSTheodore Ts'o 5877e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5878dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 58791c13d5c0STheodore Ts'o if (!err) { 58801c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 58811c13d5c0STheodore Ts'o if (save) 58821c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 58831c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5884dab291afSMingming Cao err = jbd2_journal_load(journal); 58851c13d5c0STheodore Ts'o if (save) 58861c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 58871c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 58881c13d5c0STheodore Ts'o kfree(save); 58891c13d5c0STheodore Ts'o } 5890ac27a0ecSDave Kleikamp 5891ac27a0ecSDave Kleikamp if (err) { 5892b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5893273108faSLukas Czerner goto err_out; 5894ac27a0ecSDave Kleikamp } 5895ac27a0ecSDave Kleikamp 5896617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 589711215630SJan Kara err = ext4_clear_journal_err(sb, es); 589811215630SJan Kara if (err) { 589911215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 590011215630SJan Kara jbd2_journal_destroy(journal); 590111215630SJan Kara return err; 590211215630SJan Kara } 5903ac27a0ecSDave Kleikamp 5904c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5905ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5906ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5907ac27a0ecSDave Kleikamp 5908ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 59094392fbc4SJan Kara ext4_commit_super(sb); 5910ac27a0ecSDave Kleikamp } 5911ac27a0ecSDave Kleikamp 5912ac27a0ecSDave Kleikamp return 0; 5913273108faSLukas Czerner 5914273108faSLukas Czerner err_out: 5915273108faSLukas Czerner jbd2_journal_destroy(journal); 5916273108faSLukas Czerner return err; 5917ac27a0ecSDave Kleikamp } 5918ac27a0ecSDave Kleikamp 59192d01ddc8SJan Kara /* Copy state of EXT4_SB(sb) into buffer for on-disk superblock */ 59202d01ddc8SJan Kara static void ext4_update_super(struct super_block *sb) 5921ac27a0ecSDave Kleikamp { 5922c92dc856SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5923e92ad03fSJan Kara struct ext4_super_block *es = sbi->s_es; 5924e92ad03fSJan Kara struct buffer_head *sbh = sbi->s_sbh; 5925ac27a0ecSDave Kleikamp 592605c2c00fSJan Kara lock_buffer(sbh); 5927a17712c8SJon Derrick /* 592871290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 592971290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 593071290b36STheodore Ts'o * write time when we are mounting the root file system 593171290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 593271290b36STheodore Ts'o * for people who are east of GMT and who make their clock 593371290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 593471290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 593571290b36STheodore Ts'o * to complain and force a full file system check. 593671290b36STheodore Ts'o */ 59371751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 59386a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5939afc32f7eSTheodore Ts'o es->s_kbytes_written = 5940e92ad03fSJan Kara cpu_to_le64(sbi->s_kbytes_written + 59418446fe92SChristoph Hellwig ((part_stat_read(sb->s_bdev, sectors[STAT_WRITE]) - 5942e92ad03fSJan Kara sbi->s_sectors_written_start) >> 1)); 5943e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeclusters_counter)) 594457042651STheodore Ts'o ext4_free_blocks_count_set(es, 5945e92ad03fSJan Kara EXT4_C2B(sbi, percpu_counter_sum_positive( 5946e92ad03fSJan Kara &sbi->s_freeclusters_counter))); 5947e92ad03fSJan Kara if (percpu_counter_initialized(&sbi->s_freeinodes_counter)) 59487f93cff9STheodore Ts'o es->s_free_inodes_count = 59497f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 5950e92ad03fSJan Kara &sbi->s_freeinodes_counter)); 5951c92dc856SJan Kara /* Copy error information to the on-disk superblock */ 5952c92dc856SJan Kara spin_lock(&sbi->s_error_lock); 5953c92dc856SJan Kara if (sbi->s_add_error_count > 0) { 5954c92dc856SJan Kara es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5955c92dc856SJan Kara if (!es->s_first_error_time && !es->s_first_error_time_hi) { 5956c92dc856SJan Kara __ext4_update_tstamp(&es->s_first_error_time, 5957c92dc856SJan Kara &es->s_first_error_time_hi, 5958c92dc856SJan Kara sbi->s_first_error_time); 5959c92dc856SJan Kara strncpy(es->s_first_error_func, sbi->s_first_error_func, 5960c92dc856SJan Kara sizeof(es->s_first_error_func)); 5961c92dc856SJan Kara es->s_first_error_line = 5962c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_line); 5963c92dc856SJan Kara es->s_first_error_ino = 5964c92dc856SJan Kara cpu_to_le32(sbi->s_first_error_ino); 5965c92dc856SJan Kara es->s_first_error_block = 5966c92dc856SJan Kara cpu_to_le64(sbi->s_first_error_block); 5967c92dc856SJan Kara es->s_first_error_errcode = 5968c92dc856SJan Kara ext4_errno_to_code(sbi->s_first_error_code); 5969c92dc856SJan Kara } 5970c92dc856SJan Kara __ext4_update_tstamp(&es->s_last_error_time, 5971c92dc856SJan Kara &es->s_last_error_time_hi, 5972c92dc856SJan Kara sbi->s_last_error_time); 5973c92dc856SJan Kara strncpy(es->s_last_error_func, sbi->s_last_error_func, 5974c92dc856SJan Kara sizeof(es->s_last_error_func)); 5975c92dc856SJan Kara es->s_last_error_line = cpu_to_le32(sbi->s_last_error_line); 5976c92dc856SJan Kara es->s_last_error_ino = cpu_to_le32(sbi->s_last_error_ino); 5977c92dc856SJan Kara es->s_last_error_block = cpu_to_le64(sbi->s_last_error_block); 5978c92dc856SJan Kara es->s_last_error_errcode = 5979c92dc856SJan Kara ext4_errno_to_code(sbi->s_last_error_code); 5980c92dc856SJan Kara /* 5981c92dc856SJan Kara * Start the daily error reporting function if it hasn't been 5982c92dc856SJan Kara * started already 5983c92dc856SJan Kara */ 5984c92dc856SJan Kara if (!es->s_error_count) 5985c92dc856SJan Kara mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); 5986c92dc856SJan Kara le32_add_cpu(&es->s_error_count, sbi->s_add_error_count); 5987c92dc856SJan Kara sbi->s_add_error_count = 0; 5988c92dc856SJan Kara } 5989c92dc856SJan Kara spin_unlock(&sbi->s_error_lock); 5990c92dc856SJan Kara 599106db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 59922d01ddc8SJan Kara unlock_buffer(sbh); 59932d01ddc8SJan Kara } 59942d01ddc8SJan Kara 59952d01ddc8SJan Kara static int ext4_commit_super(struct super_block *sb) 59962d01ddc8SJan Kara { 59972d01ddc8SJan Kara struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 59982d01ddc8SJan Kara 5999f88f1466SFengnan Chang if (!sbh) 6000f88f1466SFengnan Chang return -EINVAL; 6001f88f1466SFengnan Chang if (block_device_ejected(sb)) 6002f88f1466SFengnan Chang return -ENODEV; 60032d01ddc8SJan Kara 60042d01ddc8SJan Kara ext4_update_super(sb); 60052d01ddc8SJan Kara 600615baa7dcSZhang Yi lock_buffer(sbh); 600715baa7dcSZhang Yi /* Buffer got discarded which means block device got invalidated */ 600815baa7dcSZhang Yi if (!buffer_mapped(sbh)) { 600915baa7dcSZhang Yi unlock_buffer(sbh); 601015baa7dcSZhang Yi return -EIO; 601115baa7dcSZhang Yi } 601215baa7dcSZhang Yi 6013e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 60144743f839SPranay Kr. Srivastava /* 60154743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 60164743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 60174743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 60184743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 60194743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 60204743f839SPranay Kr. Srivastava * write and hope for the best. 60214743f839SPranay Kr. Srivastava */ 60224743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 60234743f839SPranay Kr. Srivastava "superblock detected"); 60244743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 60254743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 60264743f839SPranay Kr. Srivastava } 602715baa7dcSZhang Yi get_bh(sbh); 602815baa7dcSZhang Yi /* Clear potential dirty bit if it was journalled update */ 602915baa7dcSZhang Yi clear_buffer_dirty(sbh); 603015baa7dcSZhang Yi sbh->b_end_io = end_buffer_write_sync; 60311420c4a5SBart Van Assche submit_bh(REQ_OP_WRITE | REQ_SYNC | 60321420c4a5SBart Van Assche (test_opt(sb, BARRIER) ? REQ_FUA : 0), sbh); 603315baa7dcSZhang Yi wait_on_buffer(sbh); 6034c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 6035b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 6036b31e1552SEric Sandeen "superblock"); 6037914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 6038914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 603915baa7dcSZhang Yi return -EIO; 6040914258bfSTheodore Ts'o } 604115baa7dcSZhang Yi return 0; 6042ac27a0ecSDave Kleikamp } 6043ac27a0ecSDave Kleikamp 6044ac27a0ecSDave Kleikamp /* 6045ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 6046ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 6047ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 6048ac27a0ecSDave Kleikamp */ 604911215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 6050617ba13bSMingming Cao struct ext4_super_block *es) 6051ac27a0ecSDave Kleikamp { 605211215630SJan Kara int err; 6053617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 6054ac27a0ecSDave Kleikamp 6055e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 605611215630SJan Kara if (journal != NULL) { 605711215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 605811215630SJan Kara "mounted!"); 605911215630SJan Kara return -EFSCORRUPTED; 606011215630SJan Kara } 606111215630SJan Kara return 0; 60620390131bSFrank Mayhar } 6063dab291afSMingming Cao jbd2_journal_lock_updates(journal); 606401d5d965SLeah Rumancik err = jbd2_journal_flush(journal, 0); 606511215630SJan Kara if (err < 0) 60667ffe1ea8SHidehiro Kawai goto out; 60677ffe1ea8SHidehiro Kawai 606802f310fcSJan Kara if (sb_rdonly(sb) && (ext4_has_feature_journal_needs_recovery(sb) || 606902f310fcSJan Kara ext4_has_feature_orphan_present(sb))) { 607002f310fcSJan Kara if (!ext4_orphan_file_empty(sb)) { 607102f310fcSJan Kara ext4_error(sb, "Orphan file not empty on read-only fs."); 607202f310fcSJan Kara err = -EFSCORRUPTED; 607302f310fcSJan Kara goto out; 607402f310fcSJan Kara } 6075e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 607602f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 60774392fbc4SJan Kara ext4_commit_super(sb); 6078ac27a0ecSDave Kleikamp } 60797ffe1ea8SHidehiro Kawai out: 6080dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 608111215630SJan Kara return err; 6082ac27a0ecSDave Kleikamp } 6083ac27a0ecSDave Kleikamp 6084ac27a0ecSDave Kleikamp /* 6085ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 6086ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 6087ac27a0ecSDave Kleikamp * main filesystem now. 6088ac27a0ecSDave Kleikamp */ 608911215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 6090617ba13bSMingming Cao struct ext4_super_block *es) 6091ac27a0ecSDave Kleikamp { 6092ac27a0ecSDave Kleikamp journal_t *journal; 6093ac27a0ecSDave Kleikamp int j_errno; 6094ac27a0ecSDave Kleikamp const char *errstr; 6095ac27a0ecSDave Kleikamp 609611215630SJan Kara if (!ext4_has_feature_journal(sb)) { 609711215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 609811215630SJan Kara return -EFSCORRUPTED; 609911215630SJan Kara } 61000390131bSFrank Mayhar 6101617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6102ac27a0ecSDave Kleikamp 6103ac27a0ecSDave Kleikamp /* 6104ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 6105617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 6106ac27a0ecSDave Kleikamp */ 6107ac27a0ecSDave Kleikamp 6108dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 6109ac27a0ecSDave Kleikamp if (j_errno) { 6110ac27a0ecSDave Kleikamp char nbuf[16]; 6111ac27a0ecSDave Kleikamp 6112617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 611312062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 6114ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 611512062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 6116ac27a0ecSDave Kleikamp 6117617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 6118617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 61194392fbc4SJan Kara ext4_commit_super(sb); 6120ac27a0ecSDave Kleikamp 6121dab291afSMingming Cao jbd2_journal_clear_err(journal); 6122d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 6123ac27a0ecSDave Kleikamp } 612411215630SJan Kara return 0; 6125ac27a0ecSDave Kleikamp } 6126ac27a0ecSDave Kleikamp 6127ac27a0ecSDave Kleikamp /* 6128ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 6129ac27a0ecSDave Kleikamp * and wait on the commit. 6130ac27a0ecSDave Kleikamp */ 6131617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 6132ac27a0ecSDave Kleikamp { 6133ac27a0ecSDave Kleikamp journal_t *journal; 6134ac27a0ecSDave Kleikamp 6135bc98a42cSDavid Howells if (sb_rdonly(sb)) 6136ac27a0ecSDave Kleikamp return 0; 6137ac27a0ecSDave Kleikamp 6138617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 6139b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 6140ac27a0ecSDave Kleikamp } 6141ac27a0ecSDave Kleikamp 6142617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 6143ac27a0ecSDave Kleikamp { 614414ce0cb4STheodore Ts'o int ret = 0; 61459eddacf9SJan Kara tid_t target; 614606a407f1SDmitry Monakhov bool needs_barrier = false; 61478d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6148ac27a0ecSDave Kleikamp 614949598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 61500db1ff22STheodore Ts'o return 0; 61510db1ff22STheodore Ts'o 61529bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 61532e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 6154a1177825SJan Kara /* 6155a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 6156a1177825SJan Kara * no dirty dquots 6157a1177825SJan Kara */ 6158a1177825SJan Kara dquot_writeback_dquots(sb, -1); 615906a407f1SDmitry Monakhov /* 616006a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 616106a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 616206a407f1SDmitry Monakhov * transaction_commit will do it for us. 616306a407f1SDmitry Monakhov */ 6164bda32530STheodore Ts'o if (sbi->s_journal) { 616506a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 616606a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 616706a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 616806a407f1SDmitry Monakhov needs_barrier = true; 616906a407f1SDmitry Monakhov 61708d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 6171ac27a0ecSDave Kleikamp if (wait) 6172bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 6173bda32530STheodore Ts'o target); 61740390131bSFrank Mayhar } 6175bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 6176bda32530STheodore Ts'o needs_barrier = true; 617706a407f1SDmitry Monakhov if (needs_barrier) { 617806a407f1SDmitry Monakhov int err; 6179c6bf3f0eSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev); 618006a407f1SDmitry Monakhov if (!ret) 618106a407f1SDmitry Monakhov ret = err; 618206a407f1SDmitry Monakhov } 618306a407f1SDmitry Monakhov 618406a407f1SDmitry Monakhov return ret; 618506a407f1SDmitry Monakhov } 618606a407f1SDmitry Monakhov 6187ac27a0ecSDave Kleikamp /* 6188ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 6189ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 6190be4f27d3SYongqiang Yang * 6191be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 61928e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 61938e8ad8a5SJan Kara * modifications. 6194ac27a0ecSDave Kleikamp */ 6195c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 6196ac27a0ecSDave Kleikamp { 6197c4be0c1dSTakashi Sato int error = 0; 6198c4be0c1dSTakashi Sato journal_t *journal; 6199ac27a0ecSDave Kleikamp 6200bc98a42cSDavid Howells if (sb_rdonly(sb)) 62019ca92389STheodore Ts'o return 0; 62029ca92389STheodore Ts'o 6203c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 6204ac27a0ecSDave Kleikamp 6205bb044576STheodore Ts'o if (journal) { 6206ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 6207dab291afSMingming Cao jbd2_journal_lock_updates(journal); 62087ffe1ea8SHidehiro Kawai 62097ffe1ea8SHidehiro Kawai /* 6210bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 6211bb044576STheodore Ts'o * flush the journal. 62127ffe1ea8SHidehiro Kawai */ 621301d5d965SLeah Rumancik error = jbd2_journal_flush(journal, 0); 62146b0310fbSEric Sandeen if (error < 0) 62156b0310fbSEric Sandeen goto out; 6216ac27a0ecSDave Kleikamp 6217ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 6218e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 621902f310fcSJan Kara if (ext4_orphan_file_empty(sb)) 622002f310fcSJan Kara ext4_clear_feature_orphan_present(sb); 6221c642dc9eSEric Sandeen } 6222c642dc9eSEric Sandeen 62234392fbc4SJan Kara error = ext4_commit_super(sb); 62246b0310fbSEric Sandeen out: 6225bb044576STheodore Ts'o if (journal) 62268e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 6227bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 62286b0310fbSEric Sandeen return error; 6229ac27a0ecSDave Kleikamp } 6230ac27a0ecSDave Kleikamp 6231ac27a0ecSDave Kleikamp /* 6232ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 6233ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 6234ac27a0ecSDave Kleikamp */ 6235c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 6236ac27a0ecSDave Kleikamp { 6237bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 62389ca92389STheodore Ts'o return 0; 62399ca92389STheodore Ts'o 6240c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 62419ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 6242e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 624302f310fcSJan Kara if (ext4_has_feature_orphan_file(sb)) 624402f310fcSJan Kara ext4_set_feature_orphan_present(sb); 6245c642dc9eSEric Sandeen } 6246c642dc9eSEric Sandeen 62474392fbc4SJan Kara ext4_commit_super(sb); 6248c4be0c1dSTakashi Sato return 0; 6249ac27a0ecSDave Kleikamp } 6250ac27a0ecSDave Kleikamp 6251673c6100STheodore Ts'o /* 6252673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 6253673c6100STheodore Ts'o */ 6254673c6100STheodore Ts'o struct ext4_mount_options { 6255673c6100STheodore Ts'o unsigned long s_mount_opt; 6256a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 625708cefc7aSEric W. Biederman kuid_t s_resuid; 625808cefc7aSEric W. Biederman kgid_t s_resgid; 6259673c6100STheodore Ts'o unsigned long s_commit_interval; 6260673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 6261673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 6262673c6100STheodore Ts'o int s_jquota_fmt; 6263a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 6264673c6100STheodore Ts'o #endif 6265673c6100STheodore Ts'o }; 6266673c6100STheodore Ts'o 6267960e0ab6SLukas Czerner static int __ext4_remount(struct fs_context *fc, struct super_block *sb) 6268ac27a0ecSDave Kleikamp { 62697edfd85bSLukas Czerner struct ext4_fs_context *ctx = fc->fs_private; 6270617ba13bSMingming Cao struct ext4_super_block *es; 6271617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6272960e0ab6SLukas Czerner unsigned long old_sb_flags; 6273617ba13bSMingming Cao struct ext4_mount_options old_opts; 62748a266467STheodore Ts'o ext4_group_t g; 6275c5e06d10SJohann Lombardi int err = 0; 6276ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 62773bbef91bSAustin Kim int enable_quota = 0; 627803dafb5fSChen Gang int i, j; 627933458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 6280ac27a0ecSDave Kleikamp #endif 6281b237e304SHarshad Shirwadkar 628221ac738eSChengguang Xu 6283ac27a0ecSDave Kleikamp /* Store the original options */ 6284ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 6285ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 6286a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 6287ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 6288ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 6289ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 629030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 629130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 6292ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6293ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 6294a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 629503dafb5fSChen Gang if (sbi->s_qf_names[i]) { 629633458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 629733458eabSTheodore Ts'o 629833458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 629903dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 630003dafb5fSChen Gang for (j = 0; j < i; j++) 630103dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 630203dafb5fSChen Gang return -ENOMEM; 630303dafb5fSChen Gang } 630403dafb5fSChen Gang } else 630503dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 6306ac27a0ecSDave Kleikamp #endif 6307e4e58e5dSOjaswin Mujoo if (!(ctx->spec & EXT4_SPEC_JOURNAL_IOPRIO)) { 6308b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 63097edfd85bSLukas Czerner ctx->journal_ioprio = 6310b237e304SHarshad Shirwadkar sbi->s_journal->j_task->io_context->ioprio; 6311e4e58e5dSOjaswin Mujoo else 6312e4e58e5dSOjaswin Mujoo ctx->journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 6313e4e58e5dSOjaswin Mujoo 6314e4e58e5dSOjaswin Mujoo } 6315ac27a0ecSDave Kleikamp 63167edfd85bSLukas Czerner ext4_apply_options(fc, sb); 6317ac27a0ecSDave Kleikamp 63186b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 63196b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 63206b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 63212d5b86e0SEric Sandeen "during remount not supported; ignoring"); 63222d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 6323c6d3d56dSDarrick J. Wong } 6324c6d3d56dSDarrick J. Wong 63256ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 63266ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 63276ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 63286ae6514bSPiotr Sarna "both data=journal and delalloc"); 63296ae6514bSPiotr Sarna err = -EINVAL; 63306ae6514bSPiotr Sarna goto restore_opts; 63316ae6514bSPiotr Sarna } 63326ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 63336ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 63346ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 63356ae6514bSPiotr Sarna err = -EINVAL; 63366ae6514bSPiotr Sarna goto restore_opts; 63376ae6514bSPiotr Sarna } 6338ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 6339ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 6340ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 6341ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 6342ab04df78SJan Kara err = -EINVAL; 6343ab04df78SJan Kara goto restore_opts; 6344ab04df78SJan Kara } 6345923ae0ffSRoss Zwisler } 6346923ae0ffSRoss Zwisler 6347cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 6348cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 6349cdb7ee4cSTahsin Erdogan err = -EINVAL; 6350cdb7ee4cSTahsin Erdogan goto restore_opts; 6351cdb7ee4cSTahsin Erdogan } 6352cdb7ee4cSTahsin Erdogan 63539b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) 6354124e7c61SGabriel Krisman Bertazi ext4_abort(sb, ESHUTDOWN, "Abort forced by user"); 6355ac27a0ecSDave Kleikamp 63561751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 63571751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 6358ac27a0ecSDave Kleikamp 6359ac27a0ecSDave Kleikamp es = sbi->s_es; 6360ac27a0ecSDave Kleikamp 6361b3881f74STheodore Ts'o if (sbi->s_journal) { 6362617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 63637edfd85bSLukas Czerner set_task_ioprio(sbi->s_journal->j_task, ctx->journal_ioprio); 6364b3881f74STheodore Ts'o } 6365ac27a0ecSDave Kleikamp 6366c92dc856SJan Kara /* Flush outstanding errors before changing fs state */ 6367c92dc856SJan Kara flush_work(&sbi->s_error_work); 6368c92dc856SJan Kara 6369960e0ab6SLukas Czerner if ((bool)(fc->sb_flags & SB_RDONLY) != sb_rdonly(sb)) { 63709b5f6c9bSHarshad Shirwadkar if (ext4_test_mount_flag(sb, EXT4_MF_FS_ABORTED)) { 6371ac27a0ecSDave Kleikamp err = -EROFS; 6372ac27a0ecSDave Kleikamp goto restore_opts; 6373ac27a0ecSDave Kleikamp } 6374ac27a0ecSDave Kleikamp 6375960e0ab6SLukas Czerner if (fc->sb_flags & SB_RDONLY) { 637638c03b34STheodore Ts'o err = sync_filesystem(sb); 637738c03b34STheodore Ts'o if (err < 0) 637838c03b34STheodore Ts'o goto restore_opts; 63790f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 63800f0dd62fSChristoph Hellwig if (err < 0) 6381c79d967dSChristoph Hellwig goto restore_opts; 6382c79d967dSChristoph Hellwig 6383ac27a0ecSDave Kleikamp /* 6384ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 6385ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 6386ac27a0ecSDave Kleikamp */ 63871751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 6388ac27a0ecSDave Kleikamp 6389ac27a0ecSDave Kleikamp /* 6390ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 6391ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 6392ac27a0ecSDave Kleikamp * mark the partition as valid again. 6393ac27a0ecSDave Kleikamp */ 6394617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 6395617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 6396ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 6397ac27a0ecSDave Kleikamp 639811215630SJan Kara if (sbi->s_journal) { 639911215630SJan Kara /* 640011215630SJan Kara * We let remount-ro finish even if marking fs 640111215630SJan Kara * as clean failed... 640211215630SJan Kara */ 6403617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 640411215630SJan Kara } 6405ac27a0ecSDave Kleikamp } else { 6406a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 6407e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 64082cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 6409ac27a0ecSDave Kleikamp err = -EROFS; 6410ac27a0ecSDave Kleikamp goto restore_opts; 6411ac27a0ecSDave Kleikamp } 6412ead6596bSEric Sandeen /* 64138a266467STheodore Ts'o * Make sure the group descriptor checksums 64140b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 64158a266467STheodore Ts'o */ 64168a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 64178a266467STheodore Ts'o struct ext4_group_desc *gdp = 64188a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 64198a266467STheodore Ts'o 6420feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 6421b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 6422b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 6423e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 64248a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 64256a797d27SDarrick J. Wong err = -EFSBADCRC; 64268a266467STheodore Ts'o goto restore_opts; 64278a266467STheodore Ts'o } 64288a266467STheodore Ts'o } 64298a266467STheodore Ts'o 64308a266467STheodore Ts'o /* 6431ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 6432ead6596bSEric Sandeen * around from a previously readonly bdev mount, 6433ead6596bSEric Sandeen * require a full umount/remount for now. 6434ead6596bSEric Sandeen */ 643502f310fcSJan Kara if (es->s_last_orphan || !ext4_orphan_file_empty(sb)) { 6436b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 6437ead6596bSEric Sandeen "remount RDWR because of unprocessed " 6438ead6596bSEric Sandeen "orphan inode list. Please " 6439b31e1552SEric Sandeen "umount/remount instead"); 6440ead6596bSEric Sandeen err = -EINVAL; 6441ead6596bSEric Sandeen goto restore_opts; 6442ead6596bSEric Sandeen } 6443ead6596bSEric Sandeen 6444ac27a0ecSDave Kleikamp /* 6445ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 6446ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 6447ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 6448ac27a0ecSDave Kleikamp * the partition.) 6449ac27a0ecSDave Kleikamp */ 645011215630SJan Kara if (sbi->s_journal) { 645111215630SJan Kara err = ext4_clear_journal_err(sb, es); 645211215630SJan Kara if (err) 645311215630SJan Kara goto restore_opts; 645411215630SJan Kara } 6455c878bea3STheodore Ts'o sbi->s_mount_state = (le16_to_cpu(es->s_state) & 6456c878bea3STheodore Ts'o ~EXT4_FC_REPLAY); 6457c89128a0SJaegeuk Kim 6458c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 6459c89128a0SJaegeuk Kim if (err) 6460c89128a0SJaegeuk Kim goto restore_opts; 6461c89128a0SJaegeuk Kim 64621751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 6463e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 6464c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 6465c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 6466c5e06d10SJohann Lombardi err = -EROFS; 6467c5e06d10SJohann Lombardi goto restore_opts; 6468c5e06d10SJohann Lombardi } 64693bbef91bSAustin Kim #ifdef CONFIG_QUOTA 6470c79d967dSChristoph Hellwig enable_quota = 1; 64713bbef91bSAustin Kim #endif 6472ac27a0ecSDave Kleikamp } 6473ac27a0ecSDave Kleikamp } 6474bfff6873SLukas Czerner 6475bfff6873SLukas Czerner /* 6476bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 6477bfff6873SLukas Czerner * current settings 6478bfff6873SLukas Czerner */ 6479bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 6480bfff6873SLukas Czerner ext4_unregister_li_request(sb); 6481bfff6873SLukas Czerner else { 6482bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 6483bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 6484bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 6485bfff6873SLukas Czerner } 6486bfff6873SLukas Czerner 64870f5bde1dSJan Kara /* 64880f5bde1dSJan Kara * Handle creation of system zone data early because it can fail. 64890f5bde1dSJan Kara * Releasing of existing data is done when we are sure remount will 64900f5bde1dSJan Kara * succeed. 64910f5bde1dSJan Kara */ 6492dd0db94fSChunguang Xu if (test_opt(sb, BLOCK_VALIDITY) && !sbi->s_system_blks) { 6493d176b1f6SJan Kara err = ext4_setup_system_zone(sb); 6494d176b1f6SJan Kara if (err) 6495d176b1f6SJan Kara goto restore_opts; 64960f5bde1dSJan Kara } 6497d176b1f6SJan Kara 6498c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 64994392fbc4SJan Kara err = ext4_commit_super(sb); 6500c89128a0SJaegeuk Kim if (err) 6501c89128a0SJaegeuk Kim goto restore_opts; 6502c89128a0SJaegeuk Kim } 65030390131bSFrank Mayhar 6504ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6505ac27a0ecSDave Kleikamp /* Release old quota file names */ 6506a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 6507ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 65087c319d32SAditya Kali if (enable_quota) { 65097c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 65100f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 6511e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 65127c319d32SAditya Kali err = ext4_enable_quotas(sb); 651307724f98STheodore Ts'o if (err) 65147c319d32SAditya Kali goto restore_opts; 65157c319d32SAditya Kali } 65167c319d32SAditya Kali } 65177c319d32SAditya Kali #endif 6518dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65190f5bde1dSJan Kara ext4_release_system_zone(sb); 6520d4c402d9SCurt Wohlgemuth 652161bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 652261bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 652361bb4a1cSTheodore Ts'o 6524ac27a0ecSDave Kleikamp return 0; 65250b8e58a1SAndreas Dilger 6526ac27a0ecSDave Kleikamp restore_opts: 6527ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 6528ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 6529a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 6530ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 6531ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 6532ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 653330773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 653430773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 6535dd0db94fSChunguang Xu if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks) 65360f5bde1dSJan Kara ext4_release_system_zone(sb); 6537ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6538ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 6539a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 654033458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 654133458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 6542ac27a0ecSDave Kleikamp } 654333458eabSTheodore Ts'o synchronize_rcu(); 654433458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 654533458eabSTheodore Ts'o kfree(to_free[i]); 6546ac27a0ecSDave Kleikamp #endif 654761bb4a1cSTheodore Ts'o if (!ext4_has_feature_mmp(sb) || sb_rdonly(sb)) 654861bb4a1cSTheodore Ts'o ext4_stop_mmpd(sbi); 6549ac27a0ecSDave Kleikamp return err; 6550ac27a0ecSDave Kleikamp } 6551ac27a0ecSDave Kleikamp 6552cebe85d5SLukas Czerner static int ext4_reconfigure(struct fs_context *fc) 65537edfd85bSLukas Czerner { 6554cebe85d5SLukas Czerner struct super_block *sb = fc->root->d_sb; 65557edfd85bSLukas Czerner int ret; 65567edfd85bSLukas Czerner 6557cebe85d5SLukas Czerner fc->s_fs_info = EXT4_SB(sb); 65587edfd85bSLukas Czerner 6559cebe85d5SLukas Czerner ret = ext4_check_opt_consistency(fc, sb); 65607edfd85bSLukas Czerner if (ret < 0) 65617edfd85bSLukas Czerner return ret; 6562cebe85d5SLukas Czerner 6563960e0ab6SLukas Czerner ret = __ext4_remount(fc, sb); 6564cebe85d5SLukas Czerner if (ret < 0) 6565cebe85d5SLukas Czerner return ret; 6566cebe85d5SLukas Czerner 6567cebe85d5SLukas Czerner ext4_msg(sb, KERN_INFO, "re-mounted. Quota mode: %s.", 6568cebe85d5SLukas Czerner ext4_quota_mode(sb)); 6569cebe85d5SLukas Czerner 6570cebe85d5SLukas Czerner return 0; 65717edfd85bSLukas Czerner } 65727edfd85bSLukas Czerner 6573689c958cSLi Xi #ifdef CONFIG_QUOTA 6574689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 6575689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 6576689c958cSLi Xi { 6577689c958cSLi Xi struct kqid qid; 6578689c958cSLi Xi struct dquot *dquot; 6579689c958cSLi Xi u64 limit; 6580689c958cSLi Xi u64 curblock; 6581689c958cSLi Xi 6582689c958cSLi Xi qid = make_kqid_projid(projid); 6583689c958cSLi Xi dquot = dqget(sb, qid); 6584689c958cSLi Xi if (IS_ERR(dquot)) 6585689c958cSLi Xi return PTR_ERR(dquot); 65867b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 6587689c958cSLi Xi 6588a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 6589a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 659057c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 659157c32ea4SChengguang Xu 6592689c958cSLi Xi if (limit && buf->f_blocks > limit) { 6593f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 6594f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 6595689c958cSLi Xi buf->f_blocks = limit; 6596689c958cSLi Xi buf->f_bfree = buf->f_bavail = 6597689c958cSLi Xi (buf->f_blocks > curblock) ? 6598689c958cSLi Xi (buf->f_blocks - curblock) : 0; 6599689c958cSLi Xi } 6600689c958cSLi Xi 6601a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 6602a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 6603689c958cSLi Xi if (limit && buf->f_files > limit) { 6604689c958cSLi Xi buf->f_files = limit; 6605689c958cSLi Xi buf->f_ffree = 6606689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 6607689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 6608689c958cSLi Xi } 6609689c958cSLi Xi 66107b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 6611689c958cSLi Xi dqput(dquot); 6612689c958cSLi Xi return 0; 6613689c958cSLi Xi } 6614689c958cSLi Xi #endif 6615689c958cSLi Xi 6616617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 6617ac27a0ecSDave Kleikamp { 6618ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 6619617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 6620617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 662127dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 6622d02a9391SKazuya Mio s64 bfree; 662327dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 6624ac27a0ecSDave Kleikamp 6625952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 6626952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 6627ac27a0ecSDave Kleikamp 6628617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 6629ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 6630b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 663157042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 663257042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 6633d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 663457042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 663527dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 663627dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 663727dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 6638ac27a0ecSDave Kleikamp buf->f_bavail = 0; 6639ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 664052d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 6641617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 66429591c3a3SAmir Goldstein buf->f_fsid = uuid_to_fsid(es->s_uuid); 66430b8e58a1SAndreas Dilger 6644689c958cSLi Xi #ifdef CONFIG_QUOTA 6645689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 6646689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 6647689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 6648689c958cSLi Xi #endif 6649ac27a0ecSDave Kleikamp return 0; 6650ac27a0ecSDave Kleikamp } 6651ac27a0ecSDave Kleikamp 6652ac27a0ecSDave Kleikamp 6653ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 6654ac27a0ecSDave Kleikamp 6655bc8230eeSJan Kara /* 6656bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 6657bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 6658bc8230eeSJan Kara */ 6659ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 6660ac27a0ecSDave Kleikamp { 66614c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 6662ac27a0ecSDave Kleikamp } 6663ac27a0ecSDave Kleikamp 6664617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 6665ac27a0ecSDave Kleikamp { 6666ac27a0ecSDave Kleikamp int ret, err; 6667ac27a0ecSDave Kleikamp handle_t *handle; 6668ac27a0ecSDave Kleikamp struct inode *inode; 6669ac27a0ecSDave Kleikamp 6670ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 66719924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 6672617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 6673ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6674ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6675ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 6676617ba13bSMingming Cao err = ext4_journal_stop(handle); 6677ac27a0ecSDave Kleikamp if (!ret) 6678ac27a0ecSDave Kleikamp ret = err; 6679ac27a0ecSDave Kleikamp return ret; 6680ac27a0ecSDave Kleikamp } 6681ac27a0ecSDave Kleikamp 6682617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 6683ac27a0ecSDave Kleikamp { 6684ac27a0ecSDave Kleikamp int ret, err; 6685ac27a0ecSDave Kleikamp handle_t *handle; 6686ac27a0ecSDave Kleikamp 66879924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6688617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 6689ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6690ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6691ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 6692617ba13bSMingming Cao err = ext4_journal_stop(handle); 6693ac27a0ecSDave Kleikamp if (!ret) 6694ac27a0ecSDave Kleikamp ret = err; 6695ac27a0ecSDave Kleikamp return ret; 6696ac27a0ecSDave Kleikamp } 6697ac27a0ecSDave Kleikamp 6698617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 6699ac27a0ecSDave Kleikamp { 6700ac27a0ecSDave Kleikamp int ret, err; 6701ac27a0ecSDave Kleikamp handle_t *handle; 6702ac27a0ecSDave Kleikamp 67039924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 6704617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 67059c3013e9SJan Kara if (IS_ERR(handle)) { 67069c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 67079c3013e9SJan Kara dquot_release(dquot); 6708ac27a0ecSDave Kleikamp return PTR_ERR(handle); 67099c3013e9SJan Kara } 6710ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 6711617ba13bSMingming Cao err = ext4_journal_stop(handle); 6712ac27a0ecSDave Kleikamp if (!ret) 6713ac27a0ecSDave Kleikamp ret = err; 6714ac27a0ecSDave Kleikamp return ret; 6715ac27a0ecSDave Kleikamp } 6716ac27a0ecSDave Kleikamp 6717617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 6718ac27a0ecSDave Kleikamp { 6719262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 6720262b4662SJan Kara 6721f177ee08SRoman Anufriev if (ext4_is_quota_journalled(sb)) { 6722ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 6723617ba13bSMingming Cao return ext4_write_dquot(dquot); 6724ac27a0ecSDave Kleikamp } else { 6725ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 6726ac27a0ecSDave Kleikamp } 6727ac27a0ecSDave Kleikamp } 6728ac27a0ecSDave Kleikamp 6729617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 6730ac27a0ecSDave Kleikamp { 6731ac27a0ecSDave Kleikamp int ret, err; 6732ac27a0ecSDave Kleikamp handle_t *handle; 6733ac27a0ecSDave Kleikamp 6734ac27a0ecSDave Kleikamp /* Data block + inode block */ 6735f9c1f248SBaokun Li handle = ext4_journal_start_sb(sb, EXT4_HT_QUOTA, 2); 6736ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 6737ac27a0ecSDave Kleikamp return PTR_ERR(handle); 6738ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 6739617ba13bSMingming Cao err = ext4_journal_stop(handle); 6740ac27a0ecSDave Kleikamp if (!ret) 6741ac27a0ecSDave Kleikamp ret = err; 6742ac27a0ecSDave Kleikamp return ret; 6743ac27a0ecSDave Kleikamp } 6744ac27a0ecSDave Kleikamp 6745daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 6746daf647d2STheodore Ts'o { 6747daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 6748daf647d2STheodore Ts'o 6749daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 6750daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 6751daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 6752daf647d2STheodore Ts'o * because the name of the lock is set using the 6753daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 6754daf647d2STheodore Ts'o */ 6755daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 6756daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 6757daf647d2STheodore Ts'o } 6758daf647d2STheodore Ts'o 6759ac27a0ecSDave Kleikamp /* 6760ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 6761ac27a0ecSDave Kleikamp */ 6762617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 67638c54ca9cSAl Viro const struct path *path) 6764ac27a0ecSDave Kleikamp { 6765ac27a0ecSDave Kleikamp int err; 6766ac27a0ecSDave Kleikamp 6767ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 6768ac27a0ecSDave Kleikamp return -EINVAL; 67690623543bSJan Kara 6770ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 6771d8c9584eSAl Viro if (path->dentry->d_sb != sb) 6772ac27a0ecSDave Kleikamp return -EXDEV; 6773e0770e91SJan Kara 6774e0770e91SJan Kara /* Quota already enabled for this file? */ 6775e0770e91SJan Kara if (IS_NOQUOTA(d_inode(path->dentry))) 6776e0770e91SJan Kara return -EBUSY; 6777e0770e91SJan Kara 67780623543bSJan Kara /* Journaling quota? */ 67790623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 67802b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 6781f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 6782b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 6783b31e1552SEric Sandeen "Quota file not on filesystem root. " 6784b31e1552SEric Sandeen "Journaled quota will not work"); 678591389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 678691389240SJan Kara } else { 678791389240SJan Kara /* 678891389240SJan Kara * Clear the flag just in case mount options changed since 678991389240SJan Kara * last time. 679091389240SJan Kara */ 679191389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 67920623543bSJan Kara } 67930623543bSJan Kara 67940623543bSJan Kara /* 67950623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 67960623543bSJan Kara * all updates to the file when we bypass pagecache... 67970623543bSJan Kara */ 67980390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 67992b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 68000623543bSJan Kara /* 68010623543bSJan Kara * We don't need to lock updates but journal_flush() could 68020623543bSJan Kara * otherwise be livelocked... 68030623543bSJan Kara */ 68040623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 680501d5d965SLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 68060623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6807f00c9e44SJan Kara if (err) 68087ffe1ea8SHidehiro Kawai return err; 68097ffe1ea8SHidehiro Kawai } 6810957153fcSJan Kara 6811daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6812daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 681315fc69bbSJan Kara if (!err) { 6814957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6815957153fcSJan Kara handle_t *handle; 6816957153fcSJan Kara 681761a92987SJan Kara /* 681861a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 681961a92987SJan Kara * files. If this fails, we return success anyway since quotas 682061a92987SJan Kara * are already enabled and this is not a hard failure. 682161a92987SJan Kara */ 6822957153fcSJan Kara inode_lock(inode); 6823957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6824957153fcSJan Kara if (IS_ERR(handle)) 6825957153fcSJan Kara goto unlock_inode; 6826957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6827957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6828957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 68294209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6830957153fcSJan Kara ext4_journal_stop(handle); 6831957153fcSJan Kara unlock_inode: 6832957153fcSJan Kara inode_unlock(inode); 683315fc69bbSJan Kara if (err) 683415fc69bbSJan Kara dquot_quota_off(sb, type); 6835957153fcSJan Kara } 683615fc69bbSJan Kara if (err) 683715fc69bbSJan Kara lockdep_set_quota_inode(path->dentry->d_inode, 683815fc69bbSJan Kara I_DATA_SEM_NORMAL); 6839daf647d2STheodore Ts'o return err; 6840ac27a0ecSDave Kleikamp } 6841ac27a0ecSDave Kleikamp 68427c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 68437c319d32SAditya Kali unsigned int flags) 68447c319d32SAditya Kali { 68457c319d32SAditya Kali int err; 68467c319d32SAditya Kali struct inode *qf_inode; 6847a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 68487c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6849689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6850689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 68517c319d32SAditya Kali }; 68527c319d32SAditya Kali 6853e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 68547c319d32SAditya Kali 68557c319d32SAditya Kali if (!qf_inums[type]) 68567c319d32SAditya Kali return -EPERM; 68577c319d32SAditya Kali 68588a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 68597c319d32SAditya Kali if (IS_ERR(qf_inode)) { 68607c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 68617c319d32SAditya Kali return PTR_ERR(qf_inode); 68627c319d32SAditya Kali } 68637c319d32SAditya Kali 6864bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6865bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6866daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 68677212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6868daf647d2STheodore Ts'o if (err) 6869daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 687061157b24SPan Bian iput(qf_inode); 68717c319d32SAditya Kali 68727c319d32SAditya Kali return err; 68737c319d32SAditya Kali } 68747c319d32SAditya Kali 68757c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 687625c6d98fSJan Kara int ext4_enable_quotas(struct super_block *sb) 68777c319d32SAditya Kali { 68787c319d32SAditya Kali int type, err = 0; 6879a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 68807c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6881689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6882689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 68837c319d32SAditya Kali }; 688449da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 688549da9392SJan Kara test_opt(sb, USRQUOTA), 688649da9392SJan Kara test_opt(sb, GRPQUOTA), 688749da9392SJan Kara test_opt(sb, PRJQUOTA), 688849da9392SJan Kara }; 68897c319d32SAditya Kali 689091389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6891a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 68927c319d32SAditya Kali if (qf_inums[type]) { 68937c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 689449da9392SJan Kara DQUOT_USAGE_ENABLED | 689549da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 68967c319d32SAditya Kali if (err) { 68977c319d32SAditya Kali ext4_warning(sb, 689872ba7450STheodore Ts'o "Failed to enable quota tracking " 689972ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 690072ba7450STheodore Ts'o "e2fsck to fix.", type, err); 69014013d47aSJan Kara for (type--; type >= 0; type--) { 69024013d47aSJan Kara struct inode *inode; 69034013d47aSJan Kara 69044013d47aSJan Kara inode = sb_dqopt(sb)->files[type]; 69054013d47aSJan Kara if (inode) 69064013d47aSJan Kara inode = igrab(inode); 69077f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 69084013d47aSJan Kara if (inode) { 69094013d47aSJan Kara lockdep_set_quota_inode(inode, 69104013d47aSJan Kara I_DATA_SEM_NORMAL); 69114013d47aSJan Kara iput(inode); 69124013d47aSJan Kara } 69134013d47aSJan Kara } 69147f144fd0SJunichi Uekawa 69157c319d32SAditya Kali return err; 69167c319d32SAditya Kali } 69177c319d32SAditya Kali } 69187c319d32SAditya Kali } 69197c319d32SAditya Kali return 0; 69207c319d32SAditya Kali } 69217c319d32SAditya Kali 6922ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6923ca0e05e4SDmitry Monakhov { 692421f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 692521f97697SJan Kara handle_t *handle; 6926957153fcSJan Kara int err; 692721f97697SJan Kara 692887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 692987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 693087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6931ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6932ca0e05e4SDmitry Monakhov 6933957153fcSJan Kara if (!inode || !igrab(inode)) 69340b268590SAmir Goldstein goto out; 69350b268590SAmir Goldstein 6936957153fcSJan Kara err = dquot_quota_off(sb, type); 6937964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6938957153fcSJan Kara goto out_put; 6939957153fcSJan Kara 6940957153fcSJan Kara inode_lock(inode); 694161a92987SJan Kara /* 694261a92987SJan Kara * Update modification times of quota files when userspace can 694361a92987SJan Kara * start looking at them. If we fail, we return success anyway since 694461a92987SJan Kara * this is not a hard failure and quotas are already disabled. 694561a92987SJan Kara */ 69469924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 69474209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 69484209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6949957153fcSJan Kara goto out_unlock; 69504209ae12SHarshad Shirwadkar } 6951957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6952957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6953eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 69544209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 695521f97697SJan Kara ext4_journal_stop(handle); 6956957153fcSJan Kara out_unlock: 6957957153fcSJan Kara inode_unlock(inode); 6958957153fcSJan Kara out_put: 6959964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6960957153fcSJan Kara iput(inode); 6961957153fcSJan Kara return err; 696221f97697SJan Kara out: 6963ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6964ca0e05e4SDmitry Monakhov } 6965ca0e05e4SDmitry Monakhov 6966ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6967ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6968ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6969ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6970617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6971ac27a0ecSDave Kleikamp size_t len, loff_t off) 6972ac27a0ecSDave Kleikamp { 6973ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6974725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6975ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6976ac27a0ecSDave Kleikamp int tocopy; 6977ac27a0ecSDave Kleikamp size_t toread; 6978ac27a0ecSDave Kleikamp struct buffer_head *bh; 6979ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6980ac27a0ecSDave Kleikamp 6981ac27a0ecSDave Kleikamp if (off > i_size) 6982ac27a0ecSDave Kleikamp return 0; 6983ac27a0ecSDave Kleikamp if (off+len > i_size) 6984ac27a0ecSDave Kleikamp len = i_size-off; 6985ac27a0ecSDave Kleikamp toread = len; 6986ac27a0ecSDave Kleikamp while (toread > 0) { 6987ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6988ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 69891c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 69901c215028STheodore Ts'o if (IS_ERR(bh)) 69911c215028STheodore Ts'o return PTR_ERR(bh); 6992ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6993ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6994ac27a0ecSDave Kleikamp else 6995ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6996ac27a0ecSDave Kleikamp brelse(bh); 6997ac27a0ecSDave Kleikamp offset = 0; 6998ac27a0ecSDave Kleikamp toread -= tocopy; 6999ac27a0ecSDave Kleikamp data += tocopy; 7000ac27a0ecSDave Kleikamp blk++; 7001ac27a0ecSDave Kleikamp } 7002ac27a0ecSDave Kleikamp return len; 7003ac27a0ecSDave Kleikamp } 7004ac27a0ecSDave Kleikamp 7005ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 7006ac27a0ecSDave Kleikamp * enough credits) */ 7007617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 7008ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 7009ac27a0ecSDave Kleikamp { 7010ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 7011725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 70124209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 7013c5e298aeSTheodore Ts'o int retries = 0; 7014ac27a0ecSDave Kleikamp struct buffer_head *bh; 7015ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 7016ac27a0ecSDave Kleikamp 7017380a0091SYe Bin if (!handle) { 7018b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 7019b31e1552SEric Sandeen " cancelled because transaction is not started", 70209c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 70219c3013e9SJan Kara return -EIO; 70229c3013e9SJan Kara } 702367eeb568SDmitry Monakhov /* 702467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 702567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 702667eeb568SDmitry Monakhov */ 702767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 702867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 702967eeb568SDmitry Monakhov " cancelled because not block aligned", 703067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 703167eeb568SDmitry Monakhov return -EIO; 703267eeb568SDmitry Monakhov } 703367eeb568SDmitry Monakhov 7034c5e298aeSTheodore Ts'o do { 7035c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 7036c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 7037c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 703845586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 7039c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 70401c215028STheodore Ts'o if (IS_ERR(bh)) 70411c215028STheodore Ts'o return PTR_ERR(bh); 7042ac27a0ecSDave Kleikamp if (!bh) 7043ac27a0ecSDave Kleikamp goto out; 70445d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 7045188c299eSJan Kara err = ext4_journal_get_write_access(handle, sb, bh, EXT4_JTR_NONE); 7046ac27a0ecSDave Kleikamp if (err) { 7047ac27a0ecSDave Kleikamp brelse(bh); 70481c215028STheodore Ts'o return err; 7049ac27a0ecSDave Kleikamp } 7050ac27a0ecSDave Kleikamp lock_buffer(bh); 705167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 7052ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 7053ac27a0ecSDave Kleikamp unlock_buffer(bh); 70540390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 7055ac27a0ecSDave Kleikamp brelse(bh); 7056ac27a0ecSDave Kleikamp out: 705767eeb568SDmitry Monakhov if (inode->i_size < off + len) { 705867eeb568SDmitry Monakhov i_size_write(inode, off + len); 7059617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 70604209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 70614209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 70624209ae12SHarshad Shirwadkar err = err2; 706321f97697SJan Kara } 70644209ae12SHarshad Shirwadkar return err ? err : len; 7065ac27a0ecSDave Kleikamp } 7066ac27a0ecSDave Kleikamp #endif 7067ac27a0ecSDave Kleikamp 7068c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 706924b58424STheodore Ts'o static inline void register_as_ext2(void) 707024b58424STheodore Ts'o { 707124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 707224b58424STheodore Ts'o if (err) 707324b58424STheodore Ts'o printk(KERN_WARNING 707424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 707524b58424STheodore Ts'o } 707624b58424STheodore Ts'o 707724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 707824b58424STheodore Ts'o { 707924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 708024b58424STheodore Ts'o } 70812035e776STheodore Ts'o 70822035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 70832035e776STheodore Ts'o { 7084e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 70852035e776STheodore Ts'o return 0; 7086bc98a42cSDavid Howells if (sb_rdonly(sb)) 70872035e776STheodore Ts'o return 1; 7088e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 70892035e776STheodore Ts'o return 0; 70902035e776STheodore Ts'o return 1; 70912035e776STheodore Ts'o } 709224b58424STheodore Ts'o #else 709324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 709424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 70952035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 709624b58424STheodore Ts'o #endif 709724b58424STheodore Ts'o 709824b58424STheodore Ts'o static inline void register_as_ext3(void) 709924b58424STheodore Ts'o { 710024b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 710124b58424STheodore Ts'o if (err) 710224b58424STheodore Ts'o printk(KERN_WARNING 710324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 710424b58424STheodore Ts'o } 710524b58424STheodore Ts'o 710624b58424STheodore Ts'o static inline void unregister_as_ext3(void) 710724b58424STheodore Ts'o { 710824b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 710924b58424STheodore Ts'o } 71102035e776STheodore Ts'o 71112035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 71122035e776STheodore Ts'o { 7113e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 71142035e776STheodore Ts'o return 0; 7115e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 71162035e776STheodore Ts'o return 0; 7117bc98a42cSDavid Howells if (sb_rdonly(sb)) 71182035e776STheodore Ts'o return 1; 7119e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 71202035e776STheodore Ts'o return 0; 71212035e776STheodore Ts'o return 1; 71222035e776STheodore Ts'o } 712324b58424STheodore Ts'o 712403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 7125ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 712603010a33STheodore Ts'o .name = "ext4", 7127cebe85d5SLukas Czerner .init_fs_context = ext4_init_fs_context, 7128cebe85d5SLukas Czerner .parameters = ext4_param_specs, 7129ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 713014f3db55SChristian Brauner .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, 7131ac27a0ecSDave Kleikamp }; 71327f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 7133ac27a0ecSDave Kleikamp 7134e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 7135e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 7136e9e3bcecSEric Sandeen 71375dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 7138ac27a0ecSDave Kleikamp { 7139e9e3bcecSEric Sandeen int i, err; 7140c9de560dSAlex Tomas 7141e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 714207c0c5d8SAl Viro ext4_li_info = NULL; 714307c0c5d8SAl Viro 71449a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 714512e9b892SDmitry Monakhov ext4_check_flag_values(); 7146e9e3bcecSEric Sandeen 7147e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 7148e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 7149e9e3bcecSEric Sandeen 715051865fdaSZheng Liu err = ext4_init_es(); 71516fd058f7STheodore Ts'o if (err) 71526fd058f7STheodore Ts'o return err; 715351865fdaSZheng Liu 71541dc0aa46SEric Whitney err = ext4_init_pending(); 71551dc0aa46SEric Whitney if (err) 715622cfe4b4SEric Biggers goto out7; 715722cfe4b4SEric Biggers 715822cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 715922cfe4b4SEric Biggers if (err) 71601dc0aa46SEric Whitney goto out6; 71611dc0aa46SEric Whitney 716251865fdaSZheng Liu err = ext4_init_pageio(); 716351865fdaSZheng Liu if (err) 7164b5799018STheodore Ts'o goto out5; 716551865fdaSZheng Liu 71665dabfc78STheodore Ts'o err = ext4_init_system_zone(); 7167bd2d0210STheodore Ts'o if (err) 7168b5799018STheodore Ts'o goto out4; 7169857ac889SLukas Czerner 7170b5799018STheodore Ts'o err = ext4_init_sysfs(); 7171dd68314cSTheodore Ts'o if (err) 7172b5799018STheodore Ts'o goto out3; 7173857ac889SLukas Czerner 71745dabfc78STheodore Ts'o err = ext4_init_mballoc(); 7175ac27a0ecSDave Kleikamp if (err) 7176c9de560dSAlex Tomas goto out2; 7177ac27a0ecSDave Kleikamp err = init_inodecache(); 7178ac27a0ecSDave Kleikamp if (err) 7179ac27a0ecSDave Kleikamp goto out1; 7180aa75f4d3SHarshad Shirwadkar 7181aa75f4d3SHarshad Shirwadkar err = ext4_fc_init_dentry_cache(); 7182aa75f4d3SHarshad Shirwadkar if (err) 7183aa75f4d3SHarshad Shirwadkar goto out05; 7184aa75f4d3SHarshad Shirwadkar 718524b58424STheodore Ts'o register_as_ext3(); 71862035e776STheodore Ts'o register_as_ext2(); 718703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 7188ac27a0ecSDave Kleikamp if (err) 7189ac27a0ecSDave Kleikamp goto out; 7190bfff6873SLukas Czerner 7191ac27a0ecSDave Kleikamp return 0; 7192ac27a0ecSDave Kleikamp out: 719324b58424STheodore Ts'o unregister_as_ext2(); 719424b58424STheodore Ts'o unregister_as_ext3(); 7195ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7196aa75f4d3SHarshad Shirwadkar out05: 7197ac27a0ecSDave Kleikamp destroy_inodecache(); 7198ac27a0ecSDave Kleikamp out1: 71995dabfc78STheodore Ts'o ext4_exit_mballoc(); 72009c191f70ST Makphaibulchoke out2: 7201b5799018STheodore Ts'o ext4_exit_sysfs(); 7202b5799018STheodore Ts'o out3: 7203dd68314cSTheodore Ts'o ext4_exit_system_zone(); 7204b5799018STheodore Ts'o out4: 72055dabfc78STheodore Ts'o ext4_exit_pageio(); 7206b5799018STheodore Ts'o out5: 720722cfe4b4SEric Biggers ext4_exit_post_read_processing(); 72081dc0aa46SEric Whitney out6: 720922cfe4b4SEric Biggers ext4_exit_pending(); 721022cfe4b4SEric Biggers out7: 721151865fdaSZheng Liu ext4_exit_es(); 721251865fdaSZheng Liu 7213ac27a0ecSDave Kleikamp return err; 7214ac27a0ecSDave Kleikamp } 7215ac27a0ecSDave Kleikamp 72165dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 7217ac27a0ecSDave Kleikamp { 7218bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 721924b58424STheodore Ts'o unregister_as_ext2(); 722024b58424STheodore Ts'o unregister_as_ext3(); 722103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 7222ab047d51SSebastian Andrzej Siewior ext4_fc_destroy_dentry_cache(); 7223ac27a0ecSDave Kleikamp destroy_inodecache(); 72245dabfc78STheodore Ts'o ext4_exit_mballoc(); 7225b5799018STheodore Ts'o ext4_exit_sysfs(); 72265dabfc78STheodore Ts'o ext4_exit_system_zone(); 72275dabfc78STheodore Ts'o ext4_exit_pageio(); 722822cfe4b4SEric Biggers ext4_exit_post_read_processing(); 7229dd12ed14SEric Sandeen ext4_exit_es(); 72301dc0aa46SEric Whitney ext4_exit_pending(); 7231ac27a0ecSDave Kleikamp } 7232ac27a0ecSDave Kleikamp 7233ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 723483982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 7235ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 72367ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 72375dabfc78STheodore Ts'o module_init(ext4_init_fs) 72385dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 7239