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> 427abc52c2SDan Magenheimer #include <linux/cleancache.h> 437c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 44ee73f9a5SJeff Layton #include <linux/iversion.h> 45c83ad55eSGabriel Krisman Bertazi #include <linux/unicode.h> 46c6a564ffSChristoph Hellwig #include <linux/part_stat.h> 47bfff6873SLukas Czerner #include <linux/kthread.h> 48bfff6873SLukas Czerner #include <linux/freezer.h> 49bfff6873SLukas Czerner 503dcf5451SChristoph Hellwig #include "ext4.h" 514a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 523dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 53ac27a0ecSDave Kleikamp #include "xattr.h" 54ac27a0ecSDave Kleikamp #include "acl.h" 553661d286STheodore Ts'o #include "mballoc.h" 560c9ec4beSDarrick J. Wong #include "fsmap.h" 57ac27a0ecSDave Kleikamp 589bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 599bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 609bffad1eSTheodore Ts'o 610b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 620b75a840SLukas Czerner static struct mutex ext4_li_mtx; 63e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 649f6200bbSTheodore Ts'o 65617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 66ac27a0ecSDave Kleikamp unsigned long journal_devnum); 672adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 68e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 6911215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 70617ba13bSMingming Cao struct ext4_super_block *es); 7111215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 72617ba13bSMingming Cao struct ext4_super_block *es); 73617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 74617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 75617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 76c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 77c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 78152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 79152a0836SAl Viro const char *dev_name, void *data); 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); 82d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 83bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 84bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 858f1f7453SEric Sandeen static void ext4_clear_request_list(void); 86c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 87c6cb7e77SEric Whitney unsigned int journal_inum); 88ac27a0ecSDave Kleikamp 89e74031fdSJan Kara /* 90e74031fdSJan Kara * Lock ordering 91e74031fdSJan Kara * 92e74031fdSJan Kara * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and 93e74031fdSJan Kara * i_mmap_rwsem (inode->i_mmap_rwsem)! 94e74031fdSJan Kara * 95e74031fdSJan Kara * page fault path: 96c1e8d7c6SMichel Lespinasse * mmap_lock -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> 97e74031fdSJan Kara * page lock -> i_data_sem (rw) 98e74031fdSJan Kara * 99e74031fdSJan Kara * buffered write path: 100c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 101e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 102e74031fdSJan Kara * i_data_sem (rw) 103e74031fdSJan Kara * 104e74031fdSJan Kara * truncate: 1051d39834fSNikolay Borisov * sb_start_write -> i_mutex -> i_mmap_sem (w) -> i_mmap_rwsem (w) -> page lock 1061d39834fSNikolay Borisov * sb_start_write -> i_mutex -> i_mmap_sem (w) -> transaction start -> 1071d39834fSNikolay Borisov * i_data_sem (rw) 108e74031fdSJan Kara * 109e74031fdSJan Kara * direct IO: 110c1e8d7c6SMichel Lespinasse * sb_start_write -> i_mutex -> mmap_lock 1111d39834fSNikolay Borisov * sb_start_write -> i_mutex -> transaction start -> i_data_sem (rw) 112e74031fdSJan Kara * 113e74031fdSJan Kara * writepages: 114e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 115e74031fdSJan Kara */ 116e74031fdSJan Kara 117c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1182035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1192035e776STheodore Ts'o .owner = THIS_MODULE, 1202035e776STheodore Ts'o .name = "ext2", 1212035e776STheodore Ts'o .mount = ext4_mount, 1222035e776STheodore Ts'o .kill_sb = kill_block_super, 1232035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1242035e776STheodore Ts'o }; 1257f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 126fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1272035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1282035e776STheodore Ts'o #else 1292035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1302035e776STheodore Ts'o #endif 1312035e776STheodore Ts'o 1322035e776STheodore Ts'o 133ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 134ba69f9abSJan Kara .owner = THIS_MODULE, 135ba69f9abSJan Kara .name = "ext3", 136152a0836SAl Viro .mount = ext4_mount, 137ba69f9abSJan Kara .kill_sb = kill_block_super, 138ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 139ba69f9abSJan Kara }; 1407f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 141fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 142ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 143bd81d8eeSLaurent Vivier 144fb265c9cSTheodore Ts'o /* 145fb265c9cSTheodore Ts'o * This works like sb_bread() except it uses ERR_PTR for error 146fb265c9cSTheodore Ts'o * returns. Currently with sb_bread it's impossible to distinguish 147fb265c9cSTheodore Ts'o * between ENOMEM and EIO situations (since both result in a NULL 148fb265c9cSTheodore Ts'o * return. 149fb265c9cSTheodore Ts'o */ 150fb265c9cSTheodore Ts'o struct buffer_head * 151fb265c9cSTheodore Ts'o ext4_sb_bread(struct super_block *sb, sector_t block, int op_flags) 152fb265c9cSTheodore Ts'o { 153fb265c9cSTheodore Ts'o struct buffer_head *bh = sb_getblk(sb, block); 154fb265c9cSTheodore Ts'o 155fb265c9cSTheodore Ts'o if (bh == NULL) 156fb265c9cSTheodore Ts'o return ERR_PTR(-ENOMEM); 157cf2834a5STheodore Ts'o if (ext4_buffer_uptodate(bh)) 158fb265c9cSTheodore Ts'o return bh; 159fb265c9cSTheodore Ts'o ll_rw_block(REQ_OP_READ, REQ_META | op_flags, 1, &bh); 160fb265c9cSTheodore Ts'o wait_on_buffer(bh); 161fb265c9cSTheodore Ts'o if (buffer_uptodate(bh)) 162fb265c9cSTheodore Ts'o return bh; 163fb265c9cSTheodore Ts'o put_bh(bh); 164fb265c9cSTheodore Ts'o return ERR_PTR(-EIO); 165fb265c9cSTheodore Ts'o } 166fb265c9cSTheodore Ts'o 167d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 168d25425f8SDarrick J. Wong struct ext4_super_block *es) 169d25425f8SDarrick J. Wong { 170e2b911c5SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 171d25425f8SDarrick J. Wong return 1; 172d25425f8SDarrick J. Wong 173d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 174d25425f8SDarrick J. Wong } 175d25425f8SDarrick J. Wong 176a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 177a9c47317SDarrick J. Wong struct ext4_super_block *es) 178a9c47317SDarrick J. Wong { 179a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 180a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 181a9c47317SDarrick J. Wong __u32 csum; 182a9c47317SDarrick J. Wong 183a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 184a9c47317SDarrick J. Wong 185a9c47317SDarrick J. Wong return cpu_to_le32(csum); 186a9c47317SDarrick J. Wong } 187a9c47317SDarrick J. Wong 188c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 189a9c47317SDarrick J. Wong struct ext4_super_block *es) 190a9c47317SDarrick J. Wong { 1919aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 192a9c47317SDarrick J. Wong return 1; 193a9c47317SDarrick J. Wong 194a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 195a9c47317SDarrick J. Wong } 196a9c47317SDarrick J. Wong 19706db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 198a9c47317SDarrick J. Wong { 19906db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 20006db49e6STheodore Ts'o 2019aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 202a9c47317SDarrick J. Wong return; 203a9c47317SDarrick J. Wong 204a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 205a9c47317SDarrick J. Wong } 206a9c47317SDarrick J. Wong 2078fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 2088fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 209bd81d8eeSLaurent Vivier { 2103a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 2118fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2128fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 213bd81d8eeSLaurent Vivier } 214bd81d8eeSLaurent Vivier 2158fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 2168fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 217bd81d8eeSLaurent Vivier { 2185272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2198fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2208fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 221bd81d8eeSLaurent Vivier } 222bd81d8eeSLaurent Vivier 2238fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2248fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 225bd81d8eeSLaurent Vivier { 2265272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2278fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2288fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 229bd81d8eeSLaurent Vivier } 230bd81d8eeSLaurent Vivier 231021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 232560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 233560671a0SAneesh Kumar K.V { 234560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 235560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 236560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 237560671a0SAneesh Kumar K.V } 238560671a0SAneesh Kumar K.V 239560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 240560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 241560671a0SAneesh Kumar K.V { 242560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 243560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 244560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 245560671a0SAneesh Kumar K.V } 246560671a0SAneesh Kumar K.V 247560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 248560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 249560671a0SAneesh Kumar K.V { 250560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 251560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 252560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 253560671a0SAneesh Kumar K.V } 254560671a0SAneesh Kumar K.V 255560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 256560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 257560671a0SAneesh Kumar K.V { 258560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 259560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 260560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 261560671a0SAneesh Kumar K.V } 262560671a0SAneesh Kumar K.V 2638fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2648fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 265bd81d8eeSLaurent Vivier { 2663a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2678fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2688fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 269bd81d8eeSLaurent Vivier } 270bd81d8eeSLaurent Vivier 2718fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2728fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 273bd81d8eeSLaurent Vivier { 2745272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2758fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2768fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 277bd81d8eeSLaurent Vivier } 278bd81d8eeSLaurent Vivier 2798fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2808fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 281bd81d8eeSLaurent Vivier { 2825272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2838fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2848fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 285bd81d8eeSLaurent Vivier } 286bd81d8eeSLaurent Vivier 287021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 288560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 289560671a0SAneesh Kumar K.V { 290560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 291560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 292560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 293560671a0SAneesh Kumar K.V } 294560671a0SAneesh Kumar K.V 295560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 296560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 297560671a0SAneesh Kumar K.V { 298560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 299560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 300560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 301560671a0SAneesh Kumar K.V } 302560671a0SAneesh Kumar K.V 303560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 304560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 305560671a0SAneesh Kumar K.V { 306560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 307560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 308560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 309560671a0SAneesh Kumar K.V } 310560671a0SAneesh Kumar K.V 311560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 312560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 313560671a0SAneesh Kumar K.V { 314560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 315560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 316560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 317560671a0SAneesh Kumar K.V } 318560671a0SAneesh Kumar K.V 3196a0678a7SArnd Bergmann static void __ext4_update_tstamp(__le32 *lo, __u8 *hi) 3206a0678a7SArnd Bergmann { 3216a0678a7SArnd Bergmann time64_t now = ktime_get_real_seconds(); 3226a0678a7SArnd Bergmann 3236a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 3246a0678a7SArnd Bergmann 3256a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 3266a0678a7SArnd Bergmann *hi = upper_32_bits(now); 3276a0678a7SArnd Bergmann } 3286a0678a7SArnd Bergmann 3296a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 3306a0678a7SArnd Bergmann { 3316a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 3326a0678a7SArnd Bergmann } 3336a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 3346a0678a7SArnd Bergmann __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 3356a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 3366a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 337d3d1faf6SCurt Wohlgemuth 33854d3adbcSTheodore Ts'o static void __save_error_info(struct super_block *sb, int error, 33954d3adbcSTheodore Ts'o __u32 ino, __u64 block, 34054d3adbcSTheodore Ts'o const char *func, unsigned int line) 3411c13d5c0STheodore Ts'o { 3421c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 34354d3adbcSTheodore Ts'o int err; 3441c13d5c0STheodore Ts'o 3451c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3461b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 3471b46617bSTheodore Ts'o return; 3481c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3496a0678a7SArnd Bergmann ext4_update_tstamp(es, s_last_error_time); 3501c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3511c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 35254d3adbcSTheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 35354d3adbcSTheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 35454d3adbcSTheodore Ts'o switch (error) { 35554d3adbcSTheodore Ts'o case EIO: 35654d3adbcSTheodore Ts'o err = EXT4_ERR_EIO; 35754d3adbcSTheodore Ts'o break; 35854d3adbcSTheodore Ts'o case ENOMEM: 35954d3adbcSTheodore Ts'o err = EXT4_ERR_ENOMEM; 36054d3adbcSTheodore Ts'o break; 36154d3adbcSTheodore Ts'o case EFSBADCRC: 36254d3adbcSTheodore Ts'o err = EXT4_ERR_EFSBADCRC; 36354d3adbcSTheodore Ts'o break; 36454d3adbcSTheodore Ts'o case 0: 36554d3adbcSTheodore Ts'o case EFSCORRUPTED: 36654d3adbcSTheodore Ts'o err = EXT4_ERR_EFSCORRUPTED; 36754d3adbcSTheodore Ts'o break; 36854d3adbcSTheodore Ts'o case ENOSPC: 36954d3adbcSTheodore Ts'o err = EXT4_ERR_ENOSPC; 37054d3adbcSTheodore Ts'o break; 37154d3adbcSTheodore Ts'o case ENOKEY: 37254d3adbcSTheodore Ts'o err = EXT4_ERR_ENOKEY; 37354d3adbcSTheodore Ts'o break; 37454d3adbcSTheodore Ts'o case EROFS: 37554d3adbcSTheodore Ts'o err = EXT4_ERR_EROFS; 37654d3adbcSTheodore Ts'o break; 37754d3adbcSTheodore Ts'o case EFBIG: 37854d3adbcSTheodore Ts'o err = EXT4_ERR_EFBIG; 37954d3adbcSTheodore Ts'o break; 38054d3adbcSTheodore Ts'o case EEXIST: 38154d3adbcSTheodore Ts'o err = EXT4_ERR_EEXIST; 38254d3adbcSTheodore Ts'o break; 38354d3adbcSTheodore Ts'o case ERANGE: 38454d3adbcSTheodore Ts'o err = EXT4_ERR_ERANGE; 38554d3adbcSTheodore Ts'o break; 38654d3adbcSTheodore Ts'o case EOVERFLOW: 38754d3adbcSTheodore Ts'o err = EXT4_ERR_EOVERFLOW; 38854d3adbcSTheodore Ts'o break; 38954d3adbcSTheodore Ts'o case EBUSY: 39054d3adbcSTheodore Ts'o err = EXT4_ERR_EBUSY; 39154d3adbcSTheodore Ts'o break; 39254d3adbcSTheodore Ts'o case ENOTDIR: 39354d3adbcSTheodore Ts'o err = EXT4_ERR_ENOTDIR; 39454d3adbcSTheodore Ts'o break; 39554d3adbcSTheodore Ts'o case ENOTEMPTY: 39654d3adbcSTheodore Ts'o err = EXT4_ERR_ENOTEMPTY; 39754d3adbcSTheodore Ts'o break; 39854d3adbcSTheodore Ts'o case ESHUTDOWN: 39954d3adbcSTheodore Ts'o err = EXT4_ERR_ESHUTDOWN; 40054d3adbcSTheodore Ts'o break; 40154d3adbcSTheodore Ts'o case EFAULT: 40254d3adbcSTheodore Ts'o err = EXT4_ERR_EFAULT; 40354d3adbcSTheodore Ts'o break; 40454d3adbcSTheodore Ts'o default: 40554d3adbcSTheodore Ts'o err = EXT4_ERR_UNKNOWN; 40654d3adbcSTheodore Ts'o } 40754d3adbcSTheodore Ts'o es->s_last_error_errcode = err; 4081c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 4091c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 4106a0678a7SArnd Bergmann es->s_first_error_time_hi = es->s_last_error_time_hi; 4111c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 4121c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 4131c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 4141c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 4151c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 416878520acSTheodore Ts'o es->s_first_error_errcode = es->s_last_error_errcode; 4171c13d5c0STheodore Ts'o } 41866e61a9eSTheodore Ts'o /* 41966e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 42066e61a9eSTheodore Ts'o * started already 42166e61a9eSTheodore Ts'o */ 42266e61a9eSTheodore Ts'o if (!es->s_error_count) 42366e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 424ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 4251c13d5c0STheodore Ts'o } 4261c13d5c0STheodore Ts'o 42754d3adbcSTheodore Ts'o static void save_error_info(struct super_block *sb, int error, 42854d3adbcSTheodore Ts'o __u32 ino, __u64 block, 42954d3adbcSTheodore Ts'o const char *func, unsigned int line) 4301c13d5c0STheodore Ts'o { 43154d3adbcSTheodore Ts'o __save_error_info(sb, error, ino, block, func, line); 432c96e2b85SEric Sandeen if (!bdev_read_only(sb->s_bdev)) 4331c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 4341c13d5c0STheodore Ts'o } 4351c13d5c0STheodore Ts'o 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 4751dc1097fSJan Kara static bool system_going_down(void) 4761dc1097fSJan Kara { 4771dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 4781dc1097fSJan Kara || system_state == SYSTEM_RESTART; 4791dc1097fSJan Kara } 4801dc1097fSJan Kara 481ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 482ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 483ac27a0ecSDave Kleikamp * 484ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 485617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 486ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 487ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 488ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 489ac27a0ecSDave Kleikamp * write out the superblock safely. 490ac27a0ecSDave Kleikamp * 491dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 492d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 493ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 494ac27a0ecSDave Kleikamp */ 495ac27a0ecSDave Kleikamp 496617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 497ac27a0ecSDave Kleikamp { 498327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 499327eaf73STheodore Ts'o WARN_ON_ONCE(1); 500327eaf73STheodore Ts'o 501bc98a42cSDavid Howells if (sb_rdonly(sb)) 502ac27a0ecSDave Kleikamp return; 503ac27a0ecSDave Kleikamp 504ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 505617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 506ac27a0ecSDave Kleikamp 5074ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 508ac27a0ecSDave Kleikamp if (journal) 509dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 510ac27a0ecSDave Kleikamp } 5111dc1097fSJan Kara /* 5121dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 5131dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 5141dc1097fSJan Kara * disabled. 5151dc1097fSJan Kara */ 5161dc1097fSJan Kara if (test_opt(sb, ERRORS_RO) || system_going_down()) { 517b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5184418e141SDmitry Monakhov /* 5194418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5204418e141SDmitry Monakhov * before ->s_flags update 5214418e141SDmitry Monakhov */ 5224418e141SDmitry Monakhov smp_wmb(); 5231751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5241dc1097fSJan Kara } else if (test_opt(sb, ERRORS_PANIC)) { 525617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 526ac27a0ecSDave Kleikamp sb->s_id); 527ac27a0ecSDave Kleikamp } 5284327ba52SDaeho Jeong } 529ac27a0ecSDave Kleikamp 530efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 531efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 532efbed4dcSTheodore Ts'o "EXT4-fs error") 533efbed4dcSTheodore Ts'o 53412062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 53554d3adbcSTheodore Ts'o unsigned int line, int error, __u64 block, 53654d3adbcSTheodore Ts'o const char *fmt, ...) 537ac27a0ecSDave Kleikamp { 5380ff2ea7dSJoe Perches struct va_format vaf; 539ac27a0ecSDave Kleikamp va_list args; 540ac27a0ecSDave Kleikamp 5410db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 5420db1ff22STheodore Ts'o return; 5430db1ff22STheodore Ts'o 544ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 545efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 546ac27a0ecSDave Kleikamp va_start(args, fmt); 5470ff2ea7dSJoe Perches vaf.fmt = fmt; 5480ff2ea7dSJoe Perches vaf.va = &args; 549efbed4dcSTheodore Ts'o printk(KERN_CRIT 550efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 5510ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 552ac27a0ecSDave Kleikamp va_end(args); 553efbed4dcSTheodore Ts'o } 55454d3adbcSTheodore Ts'o save_error_info(sb, error, 0, block, function, line); 555617ba13bSMingming Cao ext4_handle_error(sb); 556ac27a0ecSDave Kleikamp } 557ac27a0ecSDave Kleikamp 558e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 55954d3adbcSTheodore Ts'o unsigned int line, ext4_fsblk_t block, int error, 560273df556SFrank Mayhar const char *fmt, ...) 561273df556SFrank Mayhar { 562273df556SFrank Mayhar va_list args; 563f7c21177STheodore Ts'o struct va_format vaf; 564273df556SFrank Mayhar 5650db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 5660db1ff22STheodore Ts'o return; 5670db1ff22STheodore Ts'o 568ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 569efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 570273df556SFrank Mayhar va_start(args, fmt); 571f7c21177STheodore Ts'o vaf.fmt = fmt; 572f7c21177STheodore Ts'o vaf.va = &args; 573c398eda0STheodore Ts'o if (block) 574d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 575d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 576d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 577d9ee81daSJoe Perches block, current->comm, &vaf); 578d9ee81daSJoe Perches else 579d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 580d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 581d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 582d9ee81daSJoe Perches current->comm, &vaf); 583273df556SFrank Mayhar va_end(args); 584efbed4dcSTheodore Ts'o } 58554d3adbcSTheodore Ts'o save_error_info(inode->i_sb, error, inode->i_ino, block, 58654d3adbcSTheodore Ts'o function, line); 587273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 588273df556SFrank Mayhar } 589273df556SFrank Mayhar 590e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 591f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 592f7c21177STheodore Ts'o const char *fmt, ...) 593273df556SFrank Mayhar { 594273df556SFrank Mayhar va_list args; 595f7c21177STheodore Ts'o struct va_format vaf; 596496ad9aaSAl Viro struct inode *inode = file_inode(file); 597273df556SFrank Mayhar char pathname[80], *path; 598273df556SFrank Mayhar 5990db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 6000db1ff22STheodore Ts'o return; 6010db1ff22STheodore Ts'o 602ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 603efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 6049bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 605f9a62d09SDan Carpenter if (IS_ERR(path)) 606273df556SFrank Mayhar path = "(unknown)"; 607f7c21177STheodore Ts'o va_start(args, fmt); 608f7c21177STheodore Ts'o vaf.fmt = fmt; 609f7c21177STheodore Ts'o vaf.va = &args; 610d9ee81daSJoe Perches if (block) 611d9ee81daSJoe Perches printk(KERN_CRIT 612d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 613d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 614d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 615d9ee81daSJoe Perches block, current->comm, path, &vaf); 616d9ee81daSJoe Perches else 617d9ee81daSJoe Perches printk(KERN_CRIT 618d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 619d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 620d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 621d9ee81daSJoe Perches current->comm, path, &vaf); 622273df556SFrank Mayhar va_end(args); 623efbed4dcSTheodore Ts'o } 62454d3adbcSTheodore Ts'o save_error_info(inode->i_sb, EFSCORRUPTED, inode->i_ino, block, 62554d3adbcSTheodore Ts'o function, line); 626273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 627273df556SFrank Mayhar } 628273df556SFrank Mayhar 629722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 630ac27a0ecSDave Kleikamp char nbuf[16]) 631ac27a0ecSDave Kleikamp { 632ac27a0ecSDave Kleikamp char *errstr = NULL; 633ac27a0ecSDave Kleikamp 634ac27a0ecSDave Kleikamp switch (errno) { 6356a797d27SDarrick J. Wong case -EFSCORRUPTED: 6366a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 6376a797d27SDarrick J. Wong break; 6386a797d27SDarrick J. Wong case -EFSBADCRC: 6396a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 6406a797d27SDarrick J. Wong break; 641ac27a0ecSDave Kleikamp case -EIO: 642ac27a0ecSDave Kleikamp errstr = "IO failure"; 643ac27a0ecSDave Kleikamp break; 644ac27a0ecSDave Kleikamp case -ENOMEM: 645ac27a0ecSDave Kleikamp errstr = "Out of memory"; 646ac27a0ecSDave Kleikamp break; 647ac27a0ecSDave Kleikamp case -EROFS: 64878f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 64978f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 650ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 651ac27a0ecSDave Kleikamp else 652ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 653ac27a0ecSDave Kleikamp break; 654ac27a0ecSDave Kleikamp default: 655ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 656ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 657ac27a0ecSDave Kleikamp * NULL. */ 658ac27a0ecSDave Kleikamp if (nbuf) { 659ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 660ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 661ac27a0ecSDave Kleikamp errstr = nbuf; 662ac27a0ecSDave Kleikamp } 663ac27a0ecSDave Kleikamp break; 664ac27a0ecSDave Kleikamp } 665ac27a0ecSDave Kleikamp 666ac27a0ecSDave Kleikamp return errstr; 667ac27a0ecSDave Kleikamp } 668ac27a0ecSDave Kleikamp 669617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 670ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 671ac27a0ecSDave Kleikamp 672c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 673c398eda0STheodore Ts'o unsigned int line, int errno) 674ac27a0ecSDave Kleikamp { 675ac27a0ecSDave Kleikamp char nbuf[16]; 676ac27a0ecSDave Kleikamp const char *errstr; 677ac27a0ecSDave Kleikamp 6780db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 6790db1ff22STheodore Ts'o return; 6800db1ff22STheodore Ts'o 681ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 682ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 683ac27a0ecSDave Kleikamp * an error. */ 684bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 685ac27a0ecSDave Kleikamp return; 686ac27a0ecSDave Kleikamp 687efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 688617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 689c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 690c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 691efbed4dcSTheodore Ts'o } 692ac27a0ecSDave Kleikamp 69354d3adbcSTheodore Ts'o save_error_info(sb, -errno, 0, 0, function, line); 694617ba13bSMingming Cao ext4_handle_error(sb); 695ac27a0ecSDave Kleikamp } 696ac27a0ecSDave Kleikamp 697ac27a0ecSDave Kleikamp /* 698617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 699ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 700ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 701ac27a0ecSDave Kleikamp * 702ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 703ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 704ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 705ac27a0ecSDave Kleikamp */ 706ac27a0ecSDave Kleikamp 707c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 70854d3adbcSTheodore Ts'o unsigned int line, int error, const char *fmt, ...) 709ac27a0ecSDave Kleikamp { 710651e1c3bSJoe Perches struct va_format vaf; 711ac27a0ecSDave Kleikamp va_list args; 712ac27a0ecSDave Kleikamp 7130db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7140db1ff22STheodore Ts'o return; 7150db1ff22STheodore Ts'o 71654d3adbcSTheodore Ts'o save_error_info(sb, error, 0, 0, function, line); 717ac27a0ecSDave Kleikamp va_start(args, fmt); 718651e1c3bSJoe Perches vaf.fmt = fmt; 719651e1c3bSJoe Perches vaf.va = &args; 720651e1c3bSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", 721651e1c3bSJoe Perches sb->s_id, function, line, &vaf); 722ac27a0ecSDave Kleikamp va_end(args); 723ac27a0ecSDave Kleikamp 724bc98a42cSDavid Howells if (sb_rdonly(sb) == 0) { 7254ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 7267b97d868Szhangyi (F) if (EXT4_SB(sb)->s_journal) 7277b97d868Szhangyi (F) jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 7287b97d868Szhangyi (F) 7297b97d868Szhangyi (F) ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 7304418e141SDmitry Monakhov /* 7314418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 7324418e141SDmitry Monakhov * before ->s_flags update 7334418e141SDmitry Monakhov */ 7344418e141SDmitry Monakhov smp_wmb(); 7351751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 7361c13d5c0STheodore Ts'o } 7377b97d868Szhangyi (F) if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) 7381c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 739ac27a0ecSDave Kleikamp } 740ac27a0ecSDave Kleikamp 741e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 742e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 743b31e1552SEric Sandeen { 7440ff2ea7dSJoe Perches struct va_format vaf; 745b31e1552SEric Sandeen va_list args; 746b31e1552SEric Sandeen 747efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 748efbed4dcSTheodore Ts'o return; 749efbed4dcSTheodore Ts'o 750b31e1552SEric Sandeen va_start(args, fmt); 7510ff2ea7dSJoe Perches vaf.fmt = fmt; 7520ff2ea7dSJoe Perches vaf.va = &args; 7530ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 754b31e1552SEric Sandeen va_end(args); 755b31e1552SEric Sandeen } 756b31e1552SEric Sandeen 757b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 758b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 759b03a2f7eSAndreas Dilger "EXT4-fs warning") 760b03a2f7eSAndreas Dilger 76112062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 762c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 763ac27a0ecSDave Kleikamp { 7640ff2ea7dSJoe Perches struct va_format vaf; 765ac27a0ecSDave Kleikamp va_list args; 766ac27a0ecSDave Kleikamp 767b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 768efbed4dcSTheodore Ts'o return; 769efbed4dcSTheodore Ts'o 770ac27a0ecSDave Kleikamp va_start(args, fmt); 7710ff2ea7dSJoe Perches vaf.fmt = fmt; 7720ff2ea7dSJoe Perches vaf.va = &args; 7730ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 7740ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 775ac27a0ecSDave Kleikamp va_end(args); 776ac27a0ecSDave Kleikamp } 777ac27a0ecSDave Kleikamp 778b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 779b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 780b03a2f7eSAndreas Dilger { 781b03a2f7eSAndreas Dilger struct va_format vaf; 782b03a2f7eSAndreas Dilger va_list args; 783b03a2f7eSAndreas Dilger 784b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 785b03a2f7eSAndreas Dilger return; 786b03a2f7eSAndreas Dilger 787b03a2f7eSAndreas Dilger va_start(args, fmt); 788b03a2f7eSAndreas Dilger vaf.fmt = fmt; 789b03a2f7eSAndreas Dilger vaf.va = &args; 790b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 791b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 792b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 793b03a2f7eSAndreas Dilger va_end(args); 794b03a2f7eSAndreas Dilger } 795b03a2f7eSAndreas Dilger 796e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 797e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 798e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 799e29136f8STheodore Ts'o const char *fmt, ...) 8005d1b1b3fSAneesh Kumar K.V __releases(bitlock) 8015d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 8025d1b1b3fSAneesh Kumar K.V { 8030ff2ea7dSJoe Perches struct va_format vaf; 8045d1b1b3fSAneesh Kumar K.V va_list args; 8055d1b1b3fSAneesh Kumar K.V 8060db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 8070db1ff22STheodore Ts'o return; 8080db1ff22STheodore Ts'o 809ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 81054d3adbcSTheodore Ts'o __save_error_info(sb, EFSCORRUPTED, ino, block, function, line); 8110ff2ea7dSJoe Perches 812efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 8135d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 8140ff2ea7dSJoe Perches vaf.fmt = fmt; 8150ff2ea7dSJoe Perches vaf.va = &args; 81621149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 817e29136f8STheodore Ts'o sb->s_id, function, line, grp); 818e29136f8STheodore Ts'o if (ino) 8190ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 820e29136f8STheodore Ts'o if (block) 821efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 822efbed4dcSTheodore Ts'o (unsigned long long) block); 8230ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 8245d1b1b3fSAneesh Kumar K.V va_end(args); 825efbed4dcSTheodore Ts'o } 8265d1b1b3fSAneesh Kumar K.V 827327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 828327eaf73STheodore Ts'o WARN_ON_ONCE(1); 829327eaf73STheodore Ts'o 8305d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 831e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 8325d1b1b3fSAneesh Kumar K.V return; 8335d1b1b3fSAneesh Kumar K.V } 8341c13d5c0STheodore Ts'o 8355d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 83606f29cc8SZhouyi Zhou ext4_commit_super(sb, 1); 8375d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 8385d1b1b3fSAneesh Kumar K.V /* 8395d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 8405d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 8415d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 8425d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 8435d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 84425985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 8455d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 8465d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 8475d1b1b3fSAneesh Kumar K.V * more appropriate error code. 8485d1b1b3fSAneesh Kumar K.V */ 8495d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 8505d1b1b3fSAneesh Kumar K.V return; 8515d1b1b3fSAneesh Kumar K.V } 8525d1b1b3fSAneesh Kumar K.V 853db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 854db79e6d1SWang Shilong ext4_group_t group, 855db79e6d1SWang Shilong unsigned int flags) 856db79e6d1SWang Shilong { 857db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 858db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 859db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 8609af0b3d1SWang Shilong int ret; 861db79e6d1SWang Shilong 8629af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 8639af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 8649af0b3d1SWang Shilong &grp->bb_state); 8659af0b3d1SWang Shilong if (!ret) 866db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 867db79e6d1SWang Shilong grp->bb_free); 868db79e6d1SWang Shilong } 869db79e6d1SWang Shilong 8709af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 8719af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 8729af0b3d1SWang Shilong &grp->bb_state); 8739af0b3d1SWang Shilong if (!ret && gdp) { 874db79e6d1SWang Shilong int count; 875db79e6d1SWang Shilong 876db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 877db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 878db79e6d1SWang Shilong count); 879db79e6d1SWang Shilong } 880db79e6d1SWang Shilong } 881db79e6d1SWang Shilong } 882db79e6d1SWang Shilong 883617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 884ac27a0ecSDave Kleikamp { 885617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 886ac27a0ecSDave Kleikamp 887617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 888ac27a0ecSDave Kleikamp return; 889ac27a0ecSDave Kleikamp 89012062dddSEric Sandeen ext4_warning(sb, 891ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 892ac27a0ecSDave Kleikamp "running e2fsck is recommended", 893617ba13bSMingming Cao EXT4_DYNAMIC_REV); 894ac27a0ecSDave Kleikamp 895617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 896617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 897617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 898ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 899ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 900ac27a0ecSDave Kleikamp 901ac27a0ecSDave Kleikamp /* 902ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 903ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 904ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 905ac27a0ecSDave Kleikamp */ 906ac27a0ecSDave Kleikamp } 907ac27a0ecSDave Kleikamp 908ac27a0ecSDave Kleikamp /* 909ac27a0ecSDave Kleikamp * Open the external journal device 910ac27a0ecSDave Kleikamp */ 911b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 912ac27a0ecSDave Kleikamp { 913ac27a0ecSDave Kleikamp struct block_device *bdev; 914ac27a0ecSDave Kleikamp 915d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 916ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 917ac27a0ecSDave Kleikamp goto fail; 918ac27a0ecSDave Kleikamp return bdev; 919ac27a0ecSDave Kleikamp 920ac27a0ecSDave Kleikamp fail: 921ea3edd4dSChristoph Hellwig ext4_msg(sb, KERN_ERR, 922ea3edd4dSChristoph Hellwig "failed to open journal device unknown-block(%u,%u) %ld", 923ea3edd4dSChristoph Hellwig MAJOR(dev), MINOR(dev), PTR_ERR(bdev)); 924ac27a0ecSDave Kleikamp return NULL; 925ac27a0ecSDave Kleikamp } 926ac27a0ecSDave Kleikamp 927ac27a0ecSDave Kleikamp /* 928ac27a0ecSDave Kleikamp * Release the journal device 929ac27a0ecSDave Kleikamp */ 9304385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 931ac27a0ecSDave Kleikamp { 9324385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 933ac27a0ecSDave Kleikamp } 934ac27a0ecSDave Kleikamp 9354385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 936ac27a0ecSDave Kleikamp { 937ac27a0ecSDave Kleikamp struct block_device *bdev; 938ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 939ac27a0ecSDave Kleikamp if (bdev) { 9404385bab1SAl Viro ext4_blkdev_put(bdev); 941ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 942ac27a0ecSDave Kleikamp } 943ac27a0ecSDave Kleikamp } 944ac27a0ecSDave Kleikamp 945ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 946ac27a0ecSDave Kleikamp { 947617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 948ac27a0ecSDave Kleikamp } 949ac27a0ecSDave Kleikamp 950617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 951ac27a0ecSDave Kleikamp { 952ac27a0ecSDave Kleikamp struct list_head *l; 953ac27a0ecSDave Kleikamp 954b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 955ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 956ac27a0ecSDave Kleikamp 957ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 958ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 959ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 960ac27a0ecSDave Kleikamp printk(KERN_ERR " " 961ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 962ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 963ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 964ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 965ac27a0ecSDave Kleikamp } 966ac27a0ecSDave Kleikamp } 967ac27a0ecSDave Kleikamp 968957153fcSJan Kara #ifdef CONFIG_QUOTA 969957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 970957153fcSJan Kara 971957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 972957153fcSJan Kara { 973957153fcSJan Kara int type; 974957153fcSJan Kara 975957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 976957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 977957153fcSJan Kara ext4_quota_off(sb, type); 978957153fcSJan Kara } 97933458eabSTheodore Ts'o 98033458eabSTheodore Ts'o /* 98133458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 98233458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 98333458eabSTheodore Ts'o */ 98433458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 98533458eabSTheodore Ts'o struct ext4_sb_info *sbi, 98633458eabSTheodore Ts'o int type) 98733458eabSTheodore Ts'o { 98833458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 98933458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 99033458eabSTheodore Ts'o } 991957153fcSJan Kara #else 992957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 993957153fcSJan Kara { 994957153fcSJan Kara } 995957153fcSJan Kara #endif 996957153fcSJan Kara 997617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 998ac27a0ecSDave Kleikamp { 999617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1000617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 10011d0c3924STheodore Ts'o struct buffer_head **group_desc; 10027c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 100397abd7d4STheodore Ts'o int aborted = 0; 1004ef2cabf7SHidehiro Kawai int i, err; 1005ac27a0ecSDave Kleikamp 1006857ac889SLukas Czerner ext4_unregister_li_request(sb); 1007957153fcSJan Kara ext4_quota_off_umount(sb); 1008e0ccfd95SChristoph Hellwig 10092e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 10104c0425ffSMingming Cao 10115e47868fSRitesh Harjani /* 10125e47868fSRitesh Harjani * Unregister sysfs before destroying jbd2 journal. 10135e47868fSRitesh Harjani * Since we could still access attr_journal_task attribute via sysfs 10145e47868fSRitesh Harjani * path which could have sbi->s_journal->j_task as NULL 10155e47868fSRitesh Harjani */ 10165e47868fSRitesh Harjani ext4_unregister_sysfs(sb); 10175e47868fSRitesh Harjani 10180390131bSFrank Mayhar if (sbi->s_journal) { 101997abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 1020ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 102147b4a50bSJan Kara sbi->s_journal = NULL; 1022878520acSTheodore Ts'o if ((err < 0) && !aborted) { 102354d3adbcSTheodore Ts'o ext4_abort(sb, -err, "Couldn't clean up the journal"); 10240390131bSFrank Mayhar } 1025878520acSTheodore Ts'o } 1026d4edac31SJosef Bacik 1027d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 10289105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 1029d4edac31SJosef Bacik ext4_release_system_zone(sb); 1030d4edac31SJosef Bacik ext4_mb_release(sb); 1031d4edac31SJosef Bacik ext4_ext_release(sb); 1032d4edac31SJosef Bacik 1033bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 1034e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 1035ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 1036ac27a0ecSDave Kleikamp } 1037bc98a42cSDavid Howells if (!sb_rdonly(sb)) 1038a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 1039a8e25a83SArtem Bityutskiy 10401d0c3924STheodore Ts'o rcu_read_lock(); 10411d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 1042ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 10431d0c3924STheodore Ts'o brelse(group_desc[i]); 10441d0c3924STheodore Ts'o kvfree(group_desc); 10457c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 10467c990728SSuraj Jitindar Singh if (flex_groups) { 10477c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 10487c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 10497c990728SSuraj Jitindar Singh kvfree(flex_groups); 10507c990728SSuraj Jitindar Singh } 10511d0c3924STheodore Ts'o rcu_read_unlock(); 105257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1053ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1054ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 105557042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1056bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 1057ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1058a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 105933458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1060ac27a0ecSDave Kleikamp #endif 1061ac27a0ecSDave Kleikamp 1062ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1063ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1064ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1065ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1066ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1067ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1068ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 1069ac27a0ecSDave Kleikamp 107089d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1071f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1072ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 1073ac27a0ecSDave Kleikamp /* 1074ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1075ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1076ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1077ac27a0ecSDave Kleikamp */ 1078ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 1079f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 1080617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1081ac27a0ecSDave Kleikamp } 108250c15df6SChengguang Xu 1083dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1084dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 108550c15df6SChengguang Xu 108647387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 108747387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 108850c15df6SChengguang Xu 1089c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 1090c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 10919060dd2cSEric Sandeen brelse(sbi->s_sbh); 1092ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 10933197ebdbSTheodore Ts'o /* 10943197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 10953197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 10963197ebdbSTheodore Ts'o */ 10973197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 10983197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 10990441984aSDarrick J. Wong if (sbi->s_chksum_driver) 11000441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1101705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 11025e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1103ed318a6cSEric Biggers fscrypt_free_dummy_context(&sbi->s_dummy_enc_ctx); 1104c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1105c83ad55eSGabriel Krisman Bertazi utf8_unload(sbi->s_encoding); 1106c83ad55eSGabriel Krisman Bertazi #endif 1107ac27a0ecSDave Kleikamp kfree(sbi); 1108ac27a0ecSDave Kleikamp } 1109ac27a0ecSDave Kleikamp 1110e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1111ac27a0ecSDave Kleikamp 1112ac27a0ecSDave Kleikamp /* 1113ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1114ac27a0ecSDave Kleikamp */ 1115617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1116ac27a0ecSDave Kleikamp { 1117617ba13bSMingming Cao struct ext4_inode_info *ei; 1118ac27a0ecSDave Kleikamp 1119e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1120ac27a0ecSDave Kleikamp if (!ei) 1121ac27a0ecSDave Kleikamp return NULL; 11220b8e58a1SAndreas Dilger 1123ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1124202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1125c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 1126c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 11279a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 11289a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1129edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1130eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1131edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1132dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1133d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 1134d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 11351dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1136a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1137a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 113896c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1139a9e7f447SDmitry Monakhov #endif 11408aefcd55STheodore Ts'o ei->jinode = NULL; 11412e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1142744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1143b436b9beSJan Kara ei->i_sync_tid = 0; 1144b436b9beSJan Kara ei->i_datasync_tid = 0; 1145e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 11462e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1147ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1148ac27a0ecSDave Kleikamp } 1149ac27a0ecSDave Kleikamp 11507ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 11517ff9c073STheodore Ts'o { 11527ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 11537ff9c073STheodore Ts'o 115429b3692eSEric Biggers if (!drop) 115529b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 115629b3692eSEric Biggers 11577ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 11587ff9c073STheodore Ts'o return drop; 11597ff9c073STheodore Ts'o } 11607ff9c073STheodore Ts'o 116194053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1162fa0d7e3dSNick Piggin { 11632c58d548SEric Biggers fscrypt_free_inode(inode); 1164fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1165fa0d7e3dSNick Piggin } 1166fa0d7e3dSNick Piggin 1167617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1168ac27a0ecSDave Kleikamp { 11699f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1170b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1171b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1172b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 11739f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 11749f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 11759f7dd93dSVasily Averin true); 11769f7dd93dSVasily Averin dump_stack(); 11779f7dd93dSVasily Averin } 1178ac27a0ecSDave Kleikamp } 1179ac27a0ecSDave Kleikamp 118051cc5068SAlexey Dobriyan static void init_once(void *foo) 1181ac27a0ecSDave Kleikamp { 1182617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1183ac27a0ecSDave Kleikamp 1184ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1185ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 11860e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1187ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1188ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1189ac27a0ecSDave Kleikamp } 1190ac27a0ecSDave Kleikamp 1191e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1192ac27a0ecSDave Kleikamp { 1193f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1194f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1195f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1196f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1197f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1198f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 119920c2df83SPaul Mundt init_once); 1200617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1201ac27a0ecSDave Kleikamp return -ENOMEM; 1202ac27a0ecSDave Kleikamp return 0; 1203ac27a0ecSDave Kleikamp } 1204ac27a0ecSDave Kleikamp 1205ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1206ac27a0ecSDave Kleikamp { 12078c0a8537SKirill A. Shutemov /* 12088c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 12098c0a8537SKirill A. Shutemov * destroy cache. 12108c0a8537SKirill A. Shutemov */ 12118c0a8537SKirill A. Shutemov rcu_barrier(); 1212617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1213ac27a0ecSDave Kleikamp } 1214ac27a0ecSDave Kleikamp 12150930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1216ac27a0ecSDave Kleikamp { 12170930fcc1SAl Viro invalidate_inode_buffers(inode); 1218dbd5768fSJan Kara clear_inode(inode); 1219c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 122051865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1221f4c2d372SJan Kara dquot_drop(inode); 12228aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 12238aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 12248aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 12258aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 12268aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 12278aefcd55STheodore Ts'o } 12283d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1229c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1230ac27a0ecSDave Kleikamp } 1231ac27a0ecSDave Kleikamp 12321b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 12331b961ac0SChristoph Hellwig u64 ino, u32 generation) 1234ac27a0ecSDave Kleikamp { 1235ac27a0ecSDave Kleikamp struct inode *inode; 1236ac27a0ecSDave Kleikamp 12378a363970STheodore Ts'o /* 1238ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1239ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1240ac27a0ecSDave Kleikamp */ 12418a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 12421d1fe1eeSDavid Howells if (IS_ERR(inode)) 12431d1fe1eeSDavid Howells return ERR_CAST(inode); 12441d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1245ac27a0ecSDave Kleikamp iput(inode); 1246ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1247ac27a0ecSDave Kleikamp } 12481b961ac0SChristoph Hellwig 12491b961ac0SChristoph Hellwig return inode; 1250ac27a0ecSDave Kleikamp } 12511b961ac0SChristoph Hellwig 12521b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 12531b961ac0SChristoph Hellwig int fh_len, int fh_type) 12541b961ac0SChristoph Hellwig { 12551b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 12561b961ac0SChristoph Hellwig ext4_nfs_get_inode); 12571b961ac0SChristoph Hellwig } 12581b961ac0SChristoph Hellwig 12591b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 12601b961ac0SChristoph Hellwig int fh_len, int fh_type) 12611b961ac0SChristoph Hellwig { 12621b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 12631b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1264ac27a0ecSDave Kleikamp } 1265ac27a0ecSDave Kleikamp 1266fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1267fde87268STheodore Ts'o { 1268fde87268STheodore Ts'o struct writeback_control wbc = { 1269fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1270fde87268STheodore Ts'o }; 1271fde87268STheodore Ts'o 1272fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1273fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1274fde87268STheodore Ts'o } 1275fde87268STheodore Ts'o 1276c39a7f84SToshiyuki Okajima /* 1277c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1278c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1279c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1280c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1281c39a7f84SToshiyuki Okajima */ 12820b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 12830b8e58a1SAndreas Dilger gfp_t wait) 1284c39a7f84SToshiyuki Okajima { 1285c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1286c39a7f84SToshiyuki Okajima 1287c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1288c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1289c39a7f84SToshiyuki Okajima return 0; 1290c39a7f84SToshiyuki Okajima if (journal) 1291c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1292d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1293c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1294c39a7f84SToshiyuki Okajima } 1295c39a7f84SToshiyuki Okajima 1296643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1297a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1298a7550b30SJaegeuk Kim { 1299a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1300a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1301a7550b30SJaegeuk Kim } 1302a7550b30SJaegeuk Kim 1303a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1304a7550b30SJaegeuk Kim void *fs_data) 1305a7550b30SJaegeuk Kim { 13062f8f5e76SEric Biggers handle_t *handle = fs_data; 1307c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1308a7550b30SJaegeuk Kim 13099ce0151aSEric Biggers /* 13109ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 13119ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 13129ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 13139ce0151aSEric Biggers * the filename "lost+found" itself. 13149ce0151aSEric Biggers */ 13159ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 13169ce0151aSEric Biggers return -EPERM; 1317a7550b30SJaegeuk Kim 13187d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 13197d3e06a8SRoss Zwisler return -EINVAL; 13207d3e06a8SRoss Zwisler 1321b383a73fSIra Weiny if (ext4_test_inode_flag(inode, EXT4_INODE_DAX)) 1322b383a73fSIra Weiny return -EOPNOTSUPP; 1323b383a73fSIra Weiny 132494840e3cSEric Biggers res = ext4_convert_inline_data(inode); 132594840e3cSEric Biggers if (res) 132694840e3cSEric Biggers return res; 132794840e3cSEric Biggers 13282f8f5e76SEric Biggers /* 13292f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 13302f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 13312f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 13322f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 13332f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 13342f8f5e76SEric Biggers */ 13352f8f5e76SEric Biggers 13362f8f5e76SEric Biggers if (handle) { 13372f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 13382f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 13392f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 13402f8f5e76SEric Biggers ctx, len, 0); 1341a7550b30SJaegeuk Kim if (!res) { 1342a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1343a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1344a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1345a3caa24bSJan Kara /* 13462ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 13472ee6a576SEric Biggers * S_DAX may be disabled 1348a3caa24bSJan Kara */ 1349043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1350a7550b30SJaegeuk Kim } 1351a7550b30SJaegeuk Kim return res; 1352a7550b30SJaegeuk Kim } 1353a7550b30SJaegeuk Kim 1354b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1355b8cb5a54STahsin Erdogan if (res) 1356b8cb5a54STahsin Erdogan return res; 13572f8f5e76SEric Biggers retry: 1358af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1359af65207cSTahsin Erdogan &credits); 1360dec214d0STahsin Erdogan if (res) 1361dec214d0STahsin Erdogan return res; 1362dec214d0STahsin Erdogan 1363c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1364a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1365a7550b30SJaegeuk Kim return PTR_ERR(handle); 1366a7550b30SJaegeuk Kim 13672f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 13682f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 13692f8f5e76SEric Biggers ctx, len, 0); 1370a7550b30SJaegeuk Kim if (!res) { 1371a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 13722ee6a576SEric Biggers /* 13732ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 13742ee6a576SEric Biggers * S_DAX may be disabled 13752ee6a576SEric Biggers */ 1376043546e4SIra Weiny ext4_set_inode_flags(inode, false); 1377a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1378a7550b30SJaegeuk Kim if (res) 1379a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1380a7550b30SJaegeuk Kim } 1381a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 13822f8f5e76SEric Biggers 13832f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 13842f8f5e76SEric Biggers goto retry; 1385a7550b30SJaegeuk Kim if (!res) 1386a7550b30SJaegeuk Kim res = res2; 1387a7550b30SJaegeuk Kim return res; 1388a7550b30SJaegeuk Kim } 1389a7550b30SJaegeuk Kim 1390ed318a6cSEric Biggers static const union fscrypt_context * 1391ed318a6cSEric Biggers ext4_get_dummy_context(struct super_block *sb) 1392a7550b30SJaegeuk Kim { 1393ed318a6cSEric Biggers return EXT4_SB(sb)->s_dummy_enc_ctx.ctx; 1394a7550b30SJaegeuk Kim } 1395a7550b30SJaegeuk Kim 1396b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1397b925acb8SEric Biggers { 1398b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1399b925acb8SEric Biggers } 1400b925acb8SEric Biggers 1401b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1402b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1403b925acb8SEric Biggers { 1404b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1405b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1406b925acb8SEric Biggers } 1407b925acb8SEric Biggers 14086f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1409a5d431efSEric Biggers .key_prefix = "ext4:", 1410a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1411a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1412ed318a6cSEric Biggers .get_dummy_context = ext4_get_dummy_context, 1413a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1414e12ee683SEric Biggers .max_namelen = EXT4_NAME_LEN, 1415b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1416b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1417a7550b30SJaegeuk Kim }; 1418a7550b30SJaegeuk Kim #endif 1419a7550b30SJaegeuk Kim 1420ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1421d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1422689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1423ac27a0ecSDave Kleikamp 1424617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1425617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1426617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1427617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1428617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 14296f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 14308c54ca9cSAl Viro const struct path *path); 1431617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1432617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1433ac27a0ecSDave Kleikamp size_t len, loff_t off); 1434617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1435ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 14367c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 14377c319d32SAditya Kali unsigned int flags); 14387c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1439ac27a0ecSDave Kleikamp 144096c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 144196c7e0d9SJan Kara { 144296c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 144396c7e0d9SJan Kara } 144496c7e0d9SJan Kara 144561e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 144660e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1447617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1448617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1449617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1450617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1451a5b5ee32SJan Kara .write_info = ext4_write_info, 1452a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1453a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1454040cb378SLi Xi .get_projid = ext4_get_projid, 14557a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1456ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1457ac27a0ecSDave Kleikamp }; 1458ac27a0ecSDave Kleikamp 14590d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1460617ba13bSMingming Cao .quota_on = ext4_quota_on, 1461ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1462287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 14630a240339SJan Kara .get_state = dquot_get_state, 1464287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1465287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 14666332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 14676332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1468ac27a0ecSDave Kleikamp }; 1469ac27a0ecSDave Kleikamp #endif 1470ac27a0ecSDave Kleikamp 1471ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1472617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 147394053139SAl Viro .free_inode = ext4_free_in_core_inode, 1474617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1475617ba13bSMingming Cao .write_inode = ext4_write_inode, 1476617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 14777ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 14780930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1479617ba13bSMingming Cao .put_super = ext4_put_super, 1480617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1481c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1482c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1483617ba13bSMingming Cao .statfs = ext4_statfs, 1484617ba13bSMingming Cao .remount_fs = ext4_remount, 1485617ba13bSMingming Cao .show_options = ext4_show_options, 1486ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1487617ba13bSMingming Cao .quota_read = ext4_quota_read, 1488617ba13bSMingming Cao .quota_write = ext4_quota_write, 148996c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1490ac27a0ecSDave Kleikamp #endif 1491c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1492ac27a0ecSDave Kleikamp }; 1493ac27a0ecSDave Kleikamp 149439655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 14951b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 14961b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1497617ba13bSMingming Cao .get_parent = ext4_get_parent, 1498fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1499ac27a0ecSDave Kleikamp }; 1500ac27a0ecSDave Kleikamp 1501ac27a0ecSDave Kleikamp enum { 1502ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1503ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 150472578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1505ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 150672578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1507ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1508ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1509ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 15106ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1511ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 15125a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1513ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 15149cb20f94SIra Weiny Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, 15159cb20f94SIra Weiny Opt_dax, Opt_dax_always, Opt_dax_inode, Opt_dax_never, 1516327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1517327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1518670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 15191449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 15205328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1521744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1522fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1523cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 1524ac27a0ecSDave Kleikamp }; 1525ac27a0ecSDave Kleikamp 1526a447c093SSteven Whitehouse static const match_table_t tokens = { 1527ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1528ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1529ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1530ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1531ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1532ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1533ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1534ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1535ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1536ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1537ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1538ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1539ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1540ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 154172578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 154272578c33STheodore Ts'o {Opt_removed, "orlov"}, 1543ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1544ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1545ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1546ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1547e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 15485a916be1STheodore Ts'o {Opt_noload, "noload"}, 154972578c33STheodore Ts'o {Opt_removed, "nobh"}, 155072578c33STheodore Ts'o {Opt_removed, "bh"}, 1551ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 155230773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 155330773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1554ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1555ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1556818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1557c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1558818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1559ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1560ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1561ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1562ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 15635bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 15645bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1565ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1566ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1567ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1568ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1569ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1570ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 15715a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1572ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1573ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1574ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1575ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 157649da9392SJan Kara {Opt_prjquota, "prjquota"}, 1577ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 157806705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 157906705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 158025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1581923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 15829cb20f94SIra Weiny {Opt_dax_always, "dax=always"}, 15839cb20f94SIra Weiny {Opt_dax_inode, "dax=inode"}, 15849cb20f94SIra Weiny {Opt_dax_never, "dax=never"}, 1585c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 158664769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1587327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1588327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1589a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1590a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1591670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1592dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 159336ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 159436ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 15956fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 15966fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1597240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1598b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1599afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 160006705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 160106705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1602744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1603244adf64STheodore Ts'o {Opt_dioread_lock, "nodioread_nolock"}, 1604744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 16055328e635SEric Sandeen {Opt_discard, "discard"}, 16065328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1607fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1608fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1609fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1610df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1611ed318a6cSEric Biggers {Opt_test_dummy_encryption, "test_dummy_encryption=%s"}, 16126ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1613cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1614cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 1615c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1616c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1617c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1618c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1619c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1620f3f12faaSJosef Bacik {Opt_err, NULL}, 1621ac27a0ecSDave Kleikamp }; 1622ac27a0ecSDave Kleikamp 1623617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1624ac27a0ecSDave Kleikamp { 1625617ba13bSMingming Cao ext4_fsblk_t sb_block; 1626ac27a0ecSDave Kleikamp char *options = (char *) *data; 1627ac27a0ecSDave Kleikamp 1628ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1629ac27a0ecSDave Kleikamp return 1; /* Default location */ 16300b8e58a1SAndreas Dilger 1631ac27a0ecSDave Kleikamp options += 3; 16320b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1633ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1634ac27a0ecSDave Kleikamp if (*options && *options != ',') { 16354776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1636ac27a0ecSDave Kleikamp (char *) *data); 1637ac27a0ecSDave Kleikamp return 1; 1638ac27a0ecSDave Kleikamp } 1639ac27a0ecSDave Kleikamp if (*options == ',') 1640ac27a0ecSDave Kleikamp options++; 1641ac27a0ecSDave Kleikamp *data = (void *) options; 16420b8e58a1SAndreas Dilger 1643ac27a0ecSDave Kleikamp return sb_block; 1644ac27a0ecSDave Kleikamp } 1645ac27a0ecSDave Kleikamp 1646b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1647d6006186SEric Biggers static const char deprecated_msg[] = 1648d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1649437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1650b3881f74STheodore Ts'o 165156c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 165256c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 165356c50f11SDmitry Monakhov { 165456c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 165533458eabSTheodore Ts'o char *qname, *old_qname = get_qf_name(sb, sbi, qtype); 165603dafb5fSChen Gang int ret = -1; 165756c50f11SDmitry Monakhov 165833458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && !old_qname) { 165956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 166056c50f11SDmitry Monakhov "Cannot change journaled " 166156c50f11SDmitry Monakhov "quota options when quota turned on"); 166257f73c2cSTheodore Ts'o return -1; 166356c50f11SDmitry Monakhov } 1664e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1665c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1666c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1667c325a67cSTheodore Ts'o return 1; 1668262b4662SJan Kara } 166956c50f11SDmitry Monakhov qname = match_strdup(args); 167056c50f11SDmitry Monakhov if (!qname) { 167156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 167256c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 167357f73c2cSTheodore Ts'o return -1; 167456c50f11SDmitry Monakhov } 167533458eabSTheodore Ts'o if (old_qname) { 167633458eabSTheodore Ts'o if (strcmp(old_qname, qname) == 0) 167703dafb5fSChen Gang ret = 1; 167803dafb5fSChen Gang else 167956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 168003dafb5fSChen Gang "%s quota file already specified", 168103dafb5fSChen Gang QTYPE2NAME(qtype)); 168203dafb5fSChen Gang goto errout; 168356c50f11SDmitry Monakhov } 168403dafb5fSChen Gang if (strchr(qname, '/')) { 168556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 168656c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 168703dafb5fSChen Gang goto errout; 168856c50f11SDmitry Monakhov } 168933458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], qname); 1690fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 169156c50f11SDmitry Monakhov return 1; 169203dafb5fSChen Gang errout: 169303dafb5fSChen Gang kfree(qname); 169403dafb5fSChen Gang return ret; 169556c50f11SDmitry Monakhov } 169656c50f11SDmitry Monakhov 169756c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 169856c50f11SDmitry Monakhov { 169956c50f11SDmitry Monakhov 170056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 170133458eabSTheodore Ts'o char *old_qname = get_qf_name(sb, sbi, qtype); 170256c50f11SDmitry Monakhov 170333458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && old_qname) { 170456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 170556c50f11SDmitry Monakhov " when quota turned on"); 170657f73c2cSTheodore Ts'o return -1; 170756c50f11SDmitry Monakhov } 170833458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], NULL); 170933458eabSTheodore Ts'o synchronize_rcu(); 171033458eabSTheodore Ts'o kfree(old_qname); 171156c50f11SDmitry Monakhov return 1; 171256c50f11SDmitry Monakhov } 171356c50f11SDmitry Monakhov #endif 171456c50f11SDmitry Monakhov 171526092bf5STheodore Ts'o #define MOPT_SET 0x0001 171626092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 171726092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 171826092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 171926092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 172026092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 172126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 172226092bf5STheodore Ts'o #define MOPT_Q 0 172326092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 172426092bf5STheodore Ts'o #else 172526092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 172626092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 172726092bf5STheodore Ts'o #endif 172826092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 17298dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 17308dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 17318dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1732ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 17339cb20f94SIra Weiny #define MOPT_SKIP 0x0800 173426092bf5STheodore Ts'o 173526092bf5STheodore Ts'o static const struct mount_opts { 173626092bf5STheodore Ts'o int token; 173726092bf5STheodore Ts'o int mount_opt; 173826092bf5STheodore Ts'o int flags; 173926092bf5STheodore Ts'o } ext4_mount_opts[] = { 174026092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 174126092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 174226092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 174326092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 174426092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 174526092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 17468dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 17478dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 17488dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 17498dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 175026092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 175126092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 17528dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 17538dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 17548dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 175559d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1756327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1757327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1758c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1759c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 17608dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 17611e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 176226092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 17638dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 17641e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 17658dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 176626092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 176726092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 176826092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 17698dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 17707915a861SAles Novak MOPT_NO_EXT2}, 17718dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 17727915a861SAles Novak MOPT_NO_EXT2}, 177326092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 177426092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 177526092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 177626092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 177726092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 177826092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 177926092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 178026092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 178126092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 178226092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 17839cb20f94SIra Weiny {Opt_dax, EXT4_MOUNT_DAX_ALWAYS, MOPT_SET | MOPT_SKIP}, 17849cb20f94SIra Weiny {Opt_dax_always, EXT4_MOUNT_DAX_ALWAYS, 17859cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 17869cb20f94SIra Weiny {Opt_dax_inode, EXT4_MOUNT2_DAX_INODE, 17879cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 17889cb20f94SIra Weiny {Opt_dax_never, EXT4_MOUNT2_DAX_NEVER, 17899cb20f94SIra Weiny MOPT_EXT4_ONLY | MOPT_SET | MOPT_SKIP}, 179026092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 17910efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 17920efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 17935ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 17945ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 17955ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 17968dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 17978dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 17988dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 17998dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 180026092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 180126092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 180226092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 180326092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 180426092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 180526092bf5STheodore Ts'o #else 180626092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 180726092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 180826092bf5STheodore Ts'o #endif 180926092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 181026092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1811670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 181226092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 181326092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 181426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 181526092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 181626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 181749da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 181849da9392SJan Kara MOPT_SET | MOPT_Q}, 181926092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 182049da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 182149da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 182226092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 182326092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 182426092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 182526092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 182626092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 182726092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 182826092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1829df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 1830ed318a6cSEric Biggers {Opt_test_dummy_encryption, 0, MOPT_STRING}, 1831cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 183226092bf5STheodore Ts'o {Opt_err, 0, 0} 183326092bf5STheodore Ts'o }; 183426092bf5STheodore Ts'o 1835c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1836c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1837c83ad55eSGabriel Krisman Bertazi __u16 magic; 1838c83ad55eSGabriel Krisman Bertazi char *name; 1839c83ad55eSGabriel Krisman Bertazi char *version; 1840c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 1841c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 1842c83ad55eSGabriel Krisman Bertazi }; 1843c83ad55eSGabriel Krisman Bertazi 1844c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 1845c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 1846c83ad55eSGabriel Krisman Bertazi __u16 *flags) 1847c83ad55eSGabriel Krisman Bertazi { 1848c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1849c83ad55eSGabriel Krisman Bertazi int i; 1850c83ad55eSGabriel Krisman Bertazi 1851c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1852c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1853c83ad55eSGabriel Krisman Bertazi break; 1854c83ad55eSGabriel Krisman Bertazi 1855c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 1856c83ad55eSGabriel Krisman Bertazi return -EINVAL; 1857c83ad55eSGabriel Krisman Bertazi 1858c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 1859c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 1860c83ad55eSGabriel Krisman Bertazi 1861c83ad55eSGabriel Krisman Bertazi return 0; 1862c83ad55eSGabriel Krisman Bertazi } 1863c83ad55eSGabriel Krisman Bertazi #endif 1864c83ad55eSGabriel Krisman Bertazi 1865ed318a6cSEric Biggers static int ext4_set_test_dummy_encryption(struct super_block *sb, 1866ed318a6cSEric Biggers const char *opt, 1867ed318a6cSEric Biggers const substring_t *arg, 1868ed318a6cSEric Biggers bool is_remount) 1869ed318a6cSEric Biggers { 1870ed318a6cSEric Biggers #ifdef CONFIG_FS_ENCRYPTION 1871ed318a6cSEric Biggers struct ext4_sb_info *sbi = EXT4_SB(sb); 1872ed318a6cSEric Biggers int err; 1873ed318a6cSEric Biggers 1874ed318a6cSEric Biggers /* 1875ed318a6cSEric Biggers * This mount option is just for testing, and it's not worthwhile to 1876ed318a6cSEric Biggers * implement the extra complexity (e.g. RCU protection) that would be 1877ed318a6cSEric Biggers * needed to allow it to be set or changed during remount. We do allow 1878ed318a6cSEric Biggers * it to be specified during remount, but only if there is no change. 1879ed318a6cSEric Biggers */ 1880ed318a6cSEric Biggers if (is_remount && !sbi->s_dummy_enc_ctx.ctx) { 1881ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 1882ed318a6cSEric Biggers "Can't set test_dummy_encryption on remount"); 1883ed318a6cSEric Biggers return -1; 1884ed318a6cSEric Biggers } 1885ed318a6cSEric Biggers err = fscrypt_set_test_dummy_encryption(sb, arg, &sbi->s_dummy_enc_ctx); 1886ed318a6cSEric Biggers if (err) { 1887ed318a6cSEric Biggers if (err == -EEXIST) 1888ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 1889ed318a6cSEric Biggers "Can't change test_dummy_encryption on remount"); 1890ed318a6cSEric Biggers else if (err == -EINVAL) 1891ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 1892ed318a6cSEric Biggers "Value of option \"%s\" is unrecognized", opt); 1893ed318a6cSEric Biggers else 1894ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 1895ed318a6cSEric Biggers "Error processing option \"%s\" [%d]", 1896ed318a6cSEric Biggers opt, err); 1897ed318a6cSEric Biggers return -1; 1898ed318a6cSEric Biggers } 1899ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, "Test dummy encryption mode enabled"); 1900ed318a6cSEric Biggers #else 1901ed318a6cSEric Biggers ext4_msg(sb, KERN_WARNING, 1902ed318a6cSEric Biggers "Test dummy encryption mount option ignored"); 1903ed318a6cSEric Biggers #endif 1904ed318a6cSEric Biggers return 1; 1905ed318a6cSEric Biggers } 1906ed318a6cSEric Biggers 190726092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 190826092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 190926092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 191026092bf5STheodore Ts'o { 191126092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 191226092bf5STheodore Ts'o const struct mount_opts *m; 191308cefc7aSEric W. Biederman kuid_t uid; 191408cefc7aSEric W. Biederman kgid_t gid; 191526092bf5STheodore Ts'o int arg = 0; 191626092bf5STheodore Ts'o 191757f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 191857f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 191957f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 192057f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 192157f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 192257f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 192357f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 192457f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 192557f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 192657f73c2cSTheodore Ts'o #endif 192726092bf5STheodore Ts'o switch (token) { 1928f7048605STheodore Ts'o case Opt_noacl: 1929f7048605STheodore Ts'o case Opt_nouser_xattr: 1930f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1931f7048605STheodore Ts'o break; 193226092bf5STheodore Ts'o case Opt_sb: 193326092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 193426092bf5STheodore Ts'o case Opt_removed: 19355f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 193626092bf5STheodore Ts'o return 1; 193726092bf5STheodore Ts'o case Opt_abort: 193826092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 193926092bf5STheodore Ts'o return 1; 194026092bf5STheodore Ts'o case Opt_i_version: 1941357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 194226092bf5STheodore Ts'o return 1; 1943a26f4992STheodore Ts'o case Opt_lazytime: 19441751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 1945a26f4992STheodore Ts'o return 1; 1946a26f4992STheodore Ts'o case Opt_nolazytime: 19471751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 1948a26f4992STheodore Ts'o return 1; 194926092bf5STheodore Ts'o } 195026092bf5STheodore Ts'o 19515f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 19525f3633e3SJan Kara if (token == m->token) 19535f3633e3SJan Kara break; 19545f3633e3SJan Kara 19555f3633e3SJan Kara if (m->token == Opt_err) { 19565f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 19575f3633e3SJan Kara "or missing value", opt); 19585f3633e3SJan Kara return -1; 19595f3633e3SJan Kara } 19605f3633e3SJan Kara 19618dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 19628dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 19638dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 19648dc0aa8cSTheodore Ts'o return -1; 19658dc0aa8cSTheodore Ts'o } 19668dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 19678dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 19688dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 19698dc0aa8cSTheodore Ts'o return -1; 19708dc0aa8cSTheodore Ts'o } 19718dc0aa8cSTheodore Ts'o 1972ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 19730efb3b23SJan Kara return -1; 197426092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 197526092bf5STheodore Ts'o return -1; 1976c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1977c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 197826092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 19791e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 19801e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1981c93cf2d7SDmitry Monakhov } else 1982c93cf2d7SDmitry Monakhov return -1; 1983c93cf2d7SDmitry Monakhov } 198426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 198526092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 198626092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 198726092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 198826092bf5STheodore Ts'o "options when quota turned on"); 198926092bf5STheodore Ts'o return -1; 199026092bf5STheodore Ts'o } 199126092bf5STheodore Ts'o 199226092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 199326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 199426092bf5STheodore Ts'o } else if (token == Opt_commit) { 199526092bf5STheodore Ts'o if (arg == 0) 199626092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 19979ba55543Szhangyi (F) else if (arg > INT_MAX / HZ) { 19989ba55543Szhangyi (F) ext4_msg(sb, KERN_ERR, 19999ba55543Szhangyi (F) "Invalid commit interval %d, " 20009ba55543Szhangyi (F) "must be smaller than %d", 20019ba55543Szhangyi (F) arg, INT_MAX / HZ); 20029ba55543Szhangyi (F) return -1; 20039ba55543Szhangyi (F) } 200426092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 2005670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 20069803387cSTheodore Ts'o if ((arg & 1) || 20079803387cSTheodore Ts'o (arg < 4) || 20089803387cSTheodore Ts'o (arg > (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) { 20099803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 20109803387cSTheodore Ts'o "Invalid want_extra_isize %d", arg); 20119803387cSTheodore Ts'o return -1; 20129803387cSTheodore Ts'o } 2013670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 201426092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 201526092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 201626092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 201726092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 201826092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 2019e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 2020e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 2021e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 2022e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 202326092bf5STheodore Ts'o return -1; 202426092bf5STheodore Ts'o } 202526092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 202626092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 202726092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 202826092bf5STheodore Ts'o if (!args->from) 202926092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 203026092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 2031df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 2032df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 203326092bf5STheodore Ts'o } else if (token == Opt_stripe) { 203426092bf5STheodore Ts'o sbi->s_stripe = arg; 20350efb3b23SJan Kara } else if (token == Opt_resuid) { 20360efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 20370efb3b23SJan Kara if (!uid_valid(uid)) { 20385f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 20390efb3b23SJan Kara return -1; 20400efb3b23SJan Kara } 20410efb3b23SJan Kara sbi->s_resuid = uid; 20420efb3b23SJan Kara } else if (token == Opt_resgid) { 20430efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 20440efb3b23SJan Kara if (!gid_valid(gid)) { 20455f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 20460efb3b23SJan Kara return -1; 20470efb3b23SJan Kara } 20480efb3b23SJan Kara sbi->s_resgid = gid; 20490efb3b23SJan Kara } else if (token == Opt_journal_dev) { 20500efb3b23SJan Kara if (is_remount) { 20510efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 20520efb3b23SJan Kara "Cannot specify journal on remount"); 20530efb3b23SJan Kara return -1; 20540efb3b23SJan Kara } 20550efb3b23SJan Kara *journal_devnum = arg; 2056ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 2057ad4eec61SEric Sandeen char *journal_path; 2058ad4eec61SEric Sandeen struct inode *journal_inode; 2059ad4eec61SEric Sandeen struct path path; 2060ad4eec61SEric Sandeen int error; 2061ad4eec61SEric Sandeen 2062ad4eec61SEric Sandeen if (is_remount) { 2063ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 2064ad4eec61SEric Sandeen "Cannot specify journal on remount"); 2065ad4eec61SEric Sandeen return -1; 2066ad4eec61SEric Sandeen } 2067ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 2068ad4eec61SEric Sandeen if (!journal_path) { 2069ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 2070ad4eec61SEric Sandeen "journal device string"); 2071ad4eec61SEric Sandeen return -1; 2072ad4eec61SEric Sandeen } 2073ad4eec61SEric Sandeen 2074ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 2075ad4eec61SEric Sandeen if (error) { 2076ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 2077ad4eec61SEric Sandeen "journal device path: error %d", error); 2078ad4eec61SEric Sandeen kfree(journal_path); 2079ad4eec61SEric Sandeen return -1; 2080ad4eec61SEric Sandeen } 2081ad4eec61SEric Sandeen 20822b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 2083ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 2084ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 2085ad4eec61SEric Sandeen "is not a block device", journal_path); 2086ad4eec61SEric Sandeen path_put(&path); 2087ad4eec61SEric Sandeen kfree(journal_path); 2088ad4eec61SEric Sandeen return -1; 2089ad4eec61SEric Sandeen } 2090ad4eec61SEric Sandeen 2091ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 2092ad4eec61SEric Sandeen path_put(&path); 2093ad4eec61SEric Sandeen kfree(journal_path); 20940efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 20950efb3b23SJan Kara if (arg > 7) { 20965f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 20970efb3b23SJan Kara " (must be 0-7)"); 20980efb3b23SJan Kara return -1; 20990efb3b23SJan Kara } 21000efb3b23SJan Kara *journal_ioprio = 21010efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 21026ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 2103ed318a6cSEric Biggers return ext4_set_test_dummy_encryption(sb, opt, &args[0], 2104ed318a6cSEric Biggers is_remount); 210526092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 210626092bf5STheodore Ts'o if (is_remount) { 210726092bf5STheodore Ts'o if (!sbi->s_journal) 210826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 21095f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 211026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 211126092bf5STheodore Ts'o "Cannot change data mode on remount"); 211226092bf5STheodore Ts'o return -1; 211326092bf5STheodore Ts'o } 211426092bf5STheodore Ts'o } else { 211526092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 211626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 211726092bf5STheodore Ts'o } 211826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 211926092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 212026092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 212126092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 21225f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 21235f3633e3SJan Kara "quota options when quota turned on"); 212426092bf5STheodore Ts'o return -1; 212526092bf5STheodore Ts'o } 2126e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 2127c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 2128c325a67cSTheodore Ts'o "Quota format mount options ignored " 2129262b4662SJan Kara "when QUOTA feature is enabled"); 2130c325a67cSTheodore Ts'o return 1; 2131262b4662SJan Kara } 213226092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 213326092bf5STheodore Ts'o #endif 21349cb20f94SIra Weiny } else if (token == Opt_dax || token == Opt_dax_always || 21359cb20f94SIra Weiny token == Opt_dax_inode || token == Opt_dax_never) { 2136ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 21379cb20f94SIra Weiny switch (token) { 21389cb20f94SIra Weiny case Opt_dax: 21399cb20f94SIra Weiny case Opt_dax_always: 2140829b37b8STheodore Ts'o if (is_remount && 2141829b37b8STheodore Ts'o (!(sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2142829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER))) { 2143829b37b8STheodore Ts'o fail_dax_change_remount: 2144829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't change " 2145829b37b8STheodore Ts'o "dax mount option while remounting"); 2146829b37b8STheodore Ts'o return -1; 2147829b37b8STheodore Ts'o } 2148829b37b8STheodore Ts'o if (is_remount && 2149829b37b8STheodore Ts'o (test_opt(sb, DATA_FLAGS) == 2150829b37b8STheodore Ts'o EXT4_MOUNT_JOURNAL_DATA)) { 2151829b37b8STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 2152829b37b8STheodore Ts'o "both data=journal and dax"); 2153829b37b8STheodore Ts'o return -1; 2154829b37b8STheodore Ts'o } 2155ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 2156ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 21579cb20f94SIra Weiny sbi->s_mount_opt |= EXT4_MOUNT_DAX_ALWAYS; 21589cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 21599cb20f94SIra Weiny break; 21609cb20f94SIra Weiny case Opt_dax_never: 2161829b37b8STheodore Ts'o if (is_remount && 2162829b37b8STheodore Ts'o (!(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2163829b37b8STheodore Ts'o (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS))) 2164829b37b8STheodore Ts'o goto fail_dax_change_remount; 21659cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 21669cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 21679cb20f94SIra Weiny break; 21689cb20f94SIra Weiny case Opt_dax_inode: 2169829b37b8STheodore Ts'o if (is_remount && 2170829b37b8STheodore Ts'o ((sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) || 2171829b37b8STheodore Ts'o (sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_NEVER) || 2172829b37b8STheodore Ts'o !(sbi->s_mount_opt2 & EXT4_MOUNT2_DAX_INODE))) 2173829b37b8STheodore Ts'o goto fail_dax_change_remount; 21749cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 21759cb20f94SIra Weiny sbi->s_mount_opt2 &= ~EXT4_MOUNT2_DAX_NEVER; 21769cb20f94SIra Weiny /* Strictly for printing options */ 21779cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_INODE; 21789cb20f94SIra Weiny break; 21799cb20f94SIra Weiny } 2180ef83b6e8SDan Williams #else 2181923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 21829cb20f94SIra Weiny sbi->s_mount_opt2 |= EXT4_MOUNT2_DAX_NEVER; 21839cb20f94SIra Weiny sbi->s_mount_opt &= ~EXT4_MOUNT_DAX_ALWAYS; 2184923ae0ffSRoss Zwisler return -1; 2185923ae0ffSRoss Zwisler #endif 21867915a861SAles Novak } else if (token == Opt_data_err_abort) { 21877915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 21887915a861SAles Novak } else if (token == Opt_data_err_ignore) { 21897915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 219026092bf5STheodore Ts'o } else { 219126092bf5STheodore Ts'o if (!args->from) 219226092bf5STheodore Ts'o arg = 1; 219326092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 219426092bf5STheodore Ts'o arg = !arg; 219526092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 219626092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 219726092bf5STheodore Ts'o "buggy handling of option %s", opt); 219826092bf5STheodore Ts'o WARN_ON(1); 219926092bf5STheodore Ts'o return -1; 220026092bf5STheodore Ts'o } 220126092bf5STheodore Ts'o if (arg != 0) 220226092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 220326092bf5STheodore Ts'o else 220426092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 220526092bf5STheodore Ts'o } 220626092bf5STheodore Ts'o return 1; 220726092bf5STheodore Ts'o } 220826092bf5STheodore Ts'o 2209ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 2210c3191067STheodore Ts'o unsigned long *journal_devnum, 2211b3881f74STheodore Ts'o unsigned int *journal_ioprio, 2212661aa520SEric Sandeen int is_remount) 2213ac27a0ecSDave Kleikamp { 22141e1a76edSOlof Johansson struct ext4_sb_info __maybe_unused *sbi = EXT4_SB(sb); 221533458eabSTheodore Ts'o char *p, __maybe_unused *usr_qf_name, __maybe_unused *grp_qf_name; 2216ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 221726092bf5STheodore Ts'o int token; 2218ac27a0ecSDave Kleikamp 2219ac27a0ecSDave Kleikamp if (!options) 2220ac27a0ecSDave Kleikamp return 1; 2221ac27a0ecSDave Kleikamp 2222ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 2223ac27a0ecSDave Kleikamp if (!*p) 2224ac27a0ecSDave Kleikamp continue; 222515121c18SEric Sandeen /* 222615121c18SEric Sandeen * Initialize args struct so we know whether arg was 222715121c18SEric Sandeen * found; some options take optional arguments. 222815121c18SEric Sandeen */ 2229caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 2230ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 223126092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 223226092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 2233ac27a0ecSDave Kleikamp return 0; 2234ac27a0ecSDave Kleikamp } 2235ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 223649da9392SJan Kara /* 223749da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 223849da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 223949da9392SJan Kara * to support legacy quotas in quota files. 224049da9392SJan Kara */ 224149da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 224249da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 224349da9392SJan Kara "Cannot enable project quota enforcement."); 224449da9392SJan Kara return 0; 224549da9392SJan Kara } 224633458eabSTheodore Ts'o usr_qf_name = get_qf_name(sb, sbi, USRQUOTA); 224733458eabSTheodore Ts'o grp_qf_name = get_qf_name(sb, sbi, GRPQUOTA); 224833458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 224933458eabSTheodore Ts'o if (test_opt(sb, USRQUOTA) && usr_qf_name) 2250fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 2251ac27a0ecSDave Kleikamp 225233458eabSTheodore Ts'o if (test_opt(sb, GRPQUOTA) && grp_qf_name) 2253fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 2254ac27a0ecSDave Kleikamp 225556c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 2256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 2257b31e1552SEric Sandeen "format mixing"); 2258ac27a0ecSDave Kleikamp return 0; 2259ac27a0ecSDave Kleikamp } 2260ac27a0ecSDave Kleikamp 2261ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 2262b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 2263b31e1552SEric Sandeen "not specified"); 2264ac27a0ecSDave Kleikamp return 0; 2265ac27a0ecSDave Kleikamp } 2266ac27a0ecSDave Kleikamp } 2267ac27a0ecSDave Kleikamp #endif 2268626b035bSRitesh Harjani if (test_opt(sb, DIOREAD_NOLOCK)) { 2269626b035bSRitesh Harjani int blocksize = 2270626b035bSRitesh Harjani BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 2271626b035bSRitesh Harjani if (blocksize < PAGE_SIZE) 2272626b035bSRitesh Harjani ext4_msg(sb, KERN_WARNING, "Warning: mounting with an " 2273626b035bSRitesh Harjani "experimental mount option 'dioread_nolock' " 2274626b035bSRitesh Harjani "for blocksize < PAGE_SIZE"); 2275626b035bSRitesh Harjani } 2276ac27a0ecSDave Kleikamp return 1; 2277ac27a0ecSDave Kleikamp } 2278ac27a0ecSDave Kleikamp 22792adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 22802adf6da8STheodore Ts'o struct super_block *sb) 22812adf6da8STheodore Ts'o { 22822adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 22832adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 228433458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 22852adf6da8STheodore Ts'o 22862adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 22872adf6da8STheodore Ts'o char *fmtname = ""; 22882adf6da8STheodore Ts'o 22892adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 22902adf6da8STheodore Ts'o case QFMT_VFS_OLD: 22912adf6da8STheodore Ts'o fmtname = "vfsold"; 22922adf6da8STheodore Ts'o break; 22932adf6da8STheodore Ts'o case QFMT_VFS_V0: 22942adf6da8STheodore Ts'o fmtname = "vfsv0"; 22952adf6da8STheodore Ts'o break; 22962adf6da8STheodore Ts'o case QFMT_VFS_V1: 22972adf6da8STheodore Ts'o fmtname = "vfsv1"; 22982adf6da8STheodore Ts'o break; 22992adf6da8STheodore Ts'o } 23002adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 23012adf6da8STheodore Ts'o } 23022adf6da8STheodore Ts'o 230333458eabSTheodore Ts'o rcu_read_lock(); 230433458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 230533458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 230633458eabSTheodore Ts'o if (usr_qf_name) 230733458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 230833458eabSTheodore Ts'o if (grp_qf_name) 230933458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 231033458eabSTheodore Ts'o rcu_read_unlock(); 23112adf6da8STheodore Ts'o #endif 23122adf6da8STheodore Ts'o } 23132adf6da8STheodore Ts'o 23145a916be1STheodore Ts'o static const char *token2str(int token) 23155a916be1STheodore Ts'o { 231650df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 23175a916be1STheodore Ts'o 23185a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 23195a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 23205a916be1STheodore Ts'o break; 23215a916be1STheodore Ts'o return t->pattern; 23225a916be1STheodore Ts'o } 23235a916be1STheodore Ts'o 23242adf6da8STheodore Ts'o /* 23252adf6da8STheodore Ts'o * Show an option if 23262adf6da8STheodore Ts'o * - it's set to a non-default value OR 23272adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 23282adf6da8STheodore Ts'o */ 232966acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 233066acdcf4STheodore Ts'o int nodefs) 23312adf6da8STheodore Ts'o { 23322adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 23332adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 233468afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 23355a916be1STheodore Ts'o const struct mount_opts *m; 233666acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 23372adf6da8STheodore Ts'o 233866acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 233966acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 23402adf6da8STheodore Ts'o 23412adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 23425a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 23435a916be1STheodore Ts'o 23445a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 23455a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 23465a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 23479cb20f94SIra Weiny (m->flags & MOPT_CLEAR_ERR) || m->flags & MOPT_SKIP) 23485a916be1STheodore Ts'o continue; 234968afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 23505a916be1STheodore Ts'o continue; /* skip if same as the default */ 23515a916be1STheodore Ts'o if ((want_set && 23525a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 23535a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 23545a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 23555a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 23565a916be1STheodore Ts'o } 23575a916be1STheodore Ts'o 235808cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 23595a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 236008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 236108cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 236208cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 23635a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 236408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 236508cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 236666acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 23675a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 23685a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 23692adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 23705a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 23712adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 23725a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 237366acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 23745a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 237566acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 23765a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 237766acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 23785a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2379357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 23805a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 238166acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 23825a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 238368afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 238468afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 23852adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 23865a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 23872adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 23885a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 23892adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 23905a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 23915a916be1STheodore Ts'o } 239266acdcf4STheodore Ts'o if (nodefs || 239366acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 23945a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 23952adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 23962adf6da8STheodore Ts'o 2397ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 239866acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 23995a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2400df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2401df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 24027915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 24037915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2404ed318a6cSEric Biggers 2405ed318a6cSEric Biggers fscrypt_show_test_dummy_encryption(seq, sep, sb); 24062adf6da8STheodore Ts'o 24079cb20f94SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 24089cb20f94SIra Weiny if (IS_EXT2_SB(sb)) 24099cb20f94SIra Weiny SEQ_OPTS_PUTS("dax"); 24109cb20f94SIra Weiny else 24119cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=always"); 24129cb20f94SIra Weiny } else if (test_opt2(sb, DAX_NEVER)) { 24139cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=never"); 24149cb20f94SIra Weiny } else if (test_opt2(sb, DAX_INODE)) { 24159cb20f94SIra Weiny SEQ_OPTS_PUTS("dax=inode"); 24169cb20f94SIra Weiny } 24179cb20f94SIra Weiny 24182adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 24192adf6da8STheodore Ts'o return 0; 24202adf6da8STheodore Ts'o } 24212adf6da8STheodore Ts'o 242266acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 242366acdcf4STheodore Ts'o { 242466acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 242566acdcf4STheodore Ts'o } 242666acdcf4STheodore Ts'o 2427ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 242866acdcf4STheodore Ts'o { 242966acdcf4STheodore Ts'o struct super_block *sb = seq->private; 243066acdcf4STheodore Ts'o int rc; 243166acdcf4STheodore Ts'o 2432bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 243366acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 243466acdcf4STheodore Ts'o seq_puts(seq, "\n"); 243566acdcf4STheodore Ts'o return rc; 243666acdcf4STheodore Ts'o } 243766acdcf4STheodore Ts'o 2438617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2439ac27a0ecSDave Kleikamp int read_only) 2440ac27a0ecSDave Kleikamp { 2441617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2442c89128a0SJaegeuk Kim int err = 0; 2443ac27a0ecSDave Kleikamp 2444617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2445b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2446b31e1552SEric Sandeen "forcing read-only mode"); 2447c89128a0SJaegeuk Kim err = -EROFS; 24485adaccacSyangerkun goto done; 2449ac27a0ecSDave Kleikamp } 2450ac27a0ecSDave Kleikamp if (read_only) 2451281b5995STheodore Ts'o goto done; 2452617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2453b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2454b31e1552SEric Sandeen "running e2fsck is recommended"); 2455c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2456b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2457b31e1552SEric Sandeen "warning: mounting fs with errors, " 2458b31e1552SEric Sandeen "running e2fsck is recommended"); 2459ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2460ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2461ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2462b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2463b31e1552SEric Sandeen "warning: maximal mount count reached, " 2464b31e1552SEric Sandeen "running e2fsck is recommended"); 2465ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 24666a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 24676a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 2468b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2469b31e1552SEric Sandeen "warning: checktime reached, " 2470b31e1552SEric Sandeen "running e2fsck is recommended"); 24710390131bSFrank Mayhar if (!sbi->s_journal) 2472216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2473ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2474617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2475e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 24766a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 24770390131bSFrank Mayhar if (sbi->s_journal) 2478e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2479ac27a0ecSDave Kleikamp 2480c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 2481281b5995STheodore Ts'o done: 2482ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2483a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2484a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2485ac27a0ecSDave Kleikamp sb->s_blocksize, 2486ac27a0ecSDave Kleikamp sbi->s_groups_count, 2487617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2488617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2489a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2490ac27a0ecSDave Kleikamp 24917abc52c2SDan Magenheimer cleancache_init_fs(sb); 2492c89128a0SJaegeuk Kim return err; 2493ac27a0ecSDave Kleikamp } 2494ac27a0ecSDave Kleikamp 2495117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2496117fff10STheodore Ts'o { 2497117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 24987c990728SSuraj Jitindar Singh struct flex_groups **old_groups, **new_groups; 249937b0b6b8SDan Carpenter int size, i, j; 2500117fff10STheodore Ts'o 2501117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2502117fff10STheodore Ts'o return 0; 2503117fff10STheodore Ts'o 2504117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2505117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2506117fff10STheodore Ts'o return 0; 2507117fff10STheodore Ts'o 25087c990728SSuraj Jitindar Singh new_groups = kvzalloc(roundup_pow_of_two(size * 25097c990728SSuraj Jitindar Singh sizeof(*sbi->s_flex_groups)), GFP_KERNEL); 2510117fff10STheodore Ts'o if (!new_groups) { 25117c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 25127c990728SSuraj Jitindar Singh "not enough memory for %d flex group pointers", size); 2513117fff10STheodore Ts'o return -ENOMEM; 2514117fff10STheodore Ts'o } 25157c990728SSuraj Jitindar Singh for (i = sbi->s_flex_groups_allocated; i < size; i++) { 25167c990728SSuraj Jitindar Singh new_groups[i] = kvzalloc(roundup_pow_of_two( 25177c990728SSuraj Jitindar Singh sizeof(struct flex_groups)), 25187c990728SSuraj Jitindar Singh GFP_KERNEL); 25197c990728SSuraj Jitindar Singh if (!new_groups[i]) { 252037b0b6b8SDan Carpenter for (j = sbi->s_flex_groups_allocated; j < i; j++) 252137b0b6b8SDan Carpenter kvfree(new_groups[j]); 25227c990728SSuraj Jitindar Singh kvfree(new_groups); 25237c990728SSuraj Jitindar Singh ext4_msg(sb, KERN_ERR, 25247c990728SSuraj Jitindar Singh "not enough memory for %d flex groups", size); 25257c990728SSuraj Jitindar Singh return -ENOMEM; 2526117fff10STheodore Ts'o } 25277c990728SSuraj Jitindar Singh } 25287c990728SSuraj Jitindar Singh rcu_read_lock(); 25297c990728SSuraj Jitindar Singh old_groups = rcu_dereference(sbi->s_flex_groups); 25307c990728SSuraj Jitindar Singh if (old_groups) 25317c990728SSuraj Jitindar Singh memcpy(new_groups, old_groups, 25327c990728SSuraj Jitindar Singh (sbi->s_flex_groups_allocated * 25337c990728SSuraj Jitindar Singh sizeof(struct flex_groups *))); 25347c990728SSuraj Jitindar Singh rcu_read_unlock(); 25357c990728SSuraj Jitindar Singh rcu_assign_pointer(sbi->s_flex_groups, new_groups); 25367c990728SSuraj Jitindar Singh sbi->s_flex_groups_allocated = size; 25377c990728SSuraj Jitindar Singh if (old_groups) 25387c990728SSuraj Jitindar Singh ext4_kvfree_array_rcu(old_groups); 2539117fff10STheodore Ts'o return 0; 2540117fff10STheodore Ts'o } 2541117fff10STheodore Ts'o 2542772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2543772cb7c8SJose R. Santos { 2544772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2545772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 25467c990728SSuraj Jitindar Singh struct flex_groups *fg; 2547772cb7c8SJose R. Santos ext4_group_t flex_group; 2548117fff10STheodore Ts'o int i, err; 2549772cb7c8SJose R. Santos 2550503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2551d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2552772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2553772cb7c8SJose R. Santos return 1; 2554772cb7c8SJose R. Santos } 2555772cb7c8SJose R. Santos 2556117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2557117fff10STheodore Ts'o if (err) 2558772cb7c8SJose R. Santos goto failed; 2559772cb7c8SJose R. Santos 2560772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 256188b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2562772cb7c8SJose R. Santos 2563772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 25647c990728SSuraj Jitindar Singh fg = sbi_array_rcu_deref(sbi, s_flex_groups, flex_group); 25657c990728SSuraj Jitindar Singh atomic_add(ext4_free_inodes_count(sb, gdp), &fg->free_inodes); 256690ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 25677c990728SSuraj Jitindar Singh &fg->free_clusters); 25687c990728SSuraj Jitindar Singh atomic_add(ext4_used_dirs_count(sb, gdp), &fg->used_dirs); 2569772cb7c8SJose R. Santos } 2570772cb7c8SJose R. Santos 2571772cb7c8SJose R. Santos return 1; 2572772cb7c8SJose R. Santos failed: 2573772cb7c8SJose R. Santos return 0; 2574772cb7c8SJose R. Santos } 2575772cb7c8SJose R. Santos 2576e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2577717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2578717d50e4SAndreas Dilger { 2579b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2580717d50e4SAndreas Dilger __u16 crc = 0; 2581717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2582e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2583717d50e4SAndreas Dilger 25849aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2585feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2586feb0ab32SDarrick J. Wong __u32 csum32; 2587b47820edSDaeho Jeong __u16 dummy_csum = 0; 2588feb0ab32SDarrick J. Wong 2589feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2590feb0ab32SDarrick J. Wong sizeof(le_group)); 2591b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2592b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2593b47820edSDaeho Jeong sizeof(dummy_csum)); 2594b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2595b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2596b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2597b47820edSDaeho Jeong sbi->s_desc_size - offset); 2598feb0ab32SDarrick J. Wong 2599feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2600feb0ab32SDarrick J. Wong goto out; 2601feb0ab32SDarrick J. Wong } 2602feb0ab32SDarrick J. Wong 2603feb0ab32SDarrick J. Wong /* old crc16 code */ 2604e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2605813d32f9SDarrick J. Wong return 0; 2606813d32f9SDarrick J. Wong 2607717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2608717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2609717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2610717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2611717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2612e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2613717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2614717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2615717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2616717d50e4SAndreas Dilger offset); 2617717d50e4SAndreas Dilger 2618feb0ab32SDarrick J. Wong out: 2619717d50e4SAndreas Dilger return cpu_to_le16(crc); 2620717d50e4SAndreas Dilger } 2621717d50e4SAndreas Dilger 2622feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2623717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2624717d50e4SAndreas Dilger { 2625feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2626e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2627717d50e4SAndreas Dilger return 0; 2628717d50e4SAndreas Dilger 2629717d50e4SAndreas Dilger return 1; 2630717d50e4SAndreas Dilger } 2631717d50e4SAndreas Dilger 2632feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2633feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2634feb0ab32SDarrick J. Wong { 2635feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2636feb0ab32SDarrick J. Wong return; 2637e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2638feb0ab32SDarrick J. Wong } 2639feb0ab32SDarrick J. Wong 2640ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2641bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2642829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2643bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2644ac27a0ecSDave Kleikamp { 2645617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2646617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2647617ba13bSMingming Cao ext4_fsblk_t last_block; 264844de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 2649bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2650bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2651bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2652ce421581SJose R. Santos int flexbg_flag = 0; 2653bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2654ac27a0ecSDave Kleikamp 2655e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2656ce421581SJose R. Santos flexbg_flag = 1; 2657ce421581SJose R. Santos 2658617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2659ac27a0ecSDave Kleikamp 2660197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2661197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2662197cd65aSAkinobu Mita 2663ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2664bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2665ac27a0ecSDave Kleikamp else 2666ac27a0ecSDave Kleikamp last_block = first_block + 2667617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2668ac27a0ecSDave Kleikamp 2669bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2670bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2671bfff6873SLukas Czerner grp = i; 2672bfff6873SLukas Czerner 26738fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2674829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2675829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2676829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2677829fa70dSTheodore Ts'o "superblock", i); 267818db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 267918db4b4eSTheodore Ts'o return 0; 2680829fa70dSTheodore Ts'o } 268177260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 268277260807STheodore Ts'o block_bitmap <= last_bg_block) { 268377260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 268477260807STheodore Ts'o "Block bitmap for group %u overlaps " 268577260807STheodore Ts'o "block group descriptors", i); 268677260807STheodore Ts'o if (!sb_rdonly(sb)) 268777260807STheodore Ts'o return 0; 268877260807STheodore Ts'o } 26892b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2691a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2692b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2693ac27a0ecSDave Kleikamp return 0; 2694ac27a0ecSDave Kleikamp } 26958fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2696829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2697829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2698829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2699829fa70dSTheodore Ts'o "superblock", i); 270018db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 270118db4b4eSTheodore Ts'o return 0; 2702829fa70dSTheodore Ts'o } 270377260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 270477260807STheodore Ts'o inode_bitmap <= last_bg_block) { 270577260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 270677260807STheodore Ts'o "Inode bitmap for group %u overlaps " 270777260807STheodore Ts'o "block group descriptors", i); 270877260807STheodore Ts'o if (!sb_rdonly(sb)) 270977260807STheodore Ts'o return 0; 271077260807STheodore Ts'o } 27112b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2712b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2713a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2714b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2715ac27a0ecSDave Kleikamp return 0; 2716ac27a0ecSDave Kleikamp } 27178fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2718829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2719829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2720829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2721829fa70dSTheodore Ts'o "superblock", i); 272218db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 272318db4b4eSTheodore Ts'o return 0; 2724829fa70dSTheodore Ts'o } 272577260807STheodore Ts'o if (inode_table >= sb_block + 1 && 272677260807STheodore Ts'o inode_table <= last_bg_block) { 272777260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 272877260807STheodore Ts'o "Inode table for group %u overlaps " 272977260807STheodore Ts'o "block group descriptors", i); 273077260807STheodore Ts'o if (!sb_rdonly(sb)) 273177260807STheodore Ts'o return 0; 273277260807STheodore Ts'o } 2733bd81d8eeSLaurent Vivier if (inode_table < first_block || 27342b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2735b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2736a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2737b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2738ac27a0ecSDave Kleikamp return 0; 2739ac27a0ecSDave Kleikamp } 2740955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2741feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2742b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2743b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2744e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2745fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 2746bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 2747955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2748717d50e4SAndreas Dilger return 0; 2749717d50e4SAndreas Dilger } 27507ee1ec4cSLi Zefan } 2751955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2752ce421581SJose R. Santos if (!flexbg_flag) 2753617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2754ac27a0ecSDave Kleikamp } 2755bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2756bfff6873SLukas Czerner *first_not_zeroed = grp; 2757ac27a0ecSDave Kleikamp return 1; 2758ac27a0ecSDave Kleikamp } 2759ac27a0ecSDave Kleikamp 2760617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2761ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2762ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2763ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2764ac27a0ecSDave Kleikamp * 2765ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2766ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2767ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2768ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2769ac27a0ecSDave Kleikamp * 2770ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2771ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2772ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2773617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2774ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2775ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2776ac27a0ecSDave Kleikamp */ 2777617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2778617ba13bSMingming Cao struct ext4_super_block *es) 2779ac27a0ecSDave Kleikamp { 2780ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 27812c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2782ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 278395f1fda4Szhangyi (F) int quota_update = 0; 2784ac27a0ecSDave Kleikamp int i; 2785ac27a0ecSDave Kleikamp #endif 2786ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2787ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2788ac27a0ecSDave Kleikamp return; 2789ac27a0ecSDave Kleikamp } 2790ac27a0ecSDave Kleikamp 2791a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2792b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2793b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2794a8f48a95SEric Sandeen return; 2795a8f48a95SEric Sandeen } 2796a8f48a95SEric Sandeen 2797d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2798d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2799d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2800d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2801d39195c3SAmir Goldstein return; 2802d39195c3SAmir Goldstein } 2803d39195c3SAmir Goldstein 2804617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2805c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 28061751e8a6SLinus Torvalds if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { 280784474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2808ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2809ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2810c25f9bc6SEric Sandeen } 2811ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2812ac27a0ecSDave Kleikamp return; 2813ac27a0ecSDave Kleikamp } 2814ac27a0ecSDave Kleikamp 28151751e8a6SLinus Torvalds if (s_flags & SB_RDONLY) { 2816b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 28171751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 2818ac27a0ecSDave Kleikamp } 2819ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2820ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 28211751e8a6SLinus Torvalds sb->s_flags |= SB_ACTIVE; 282295f1fda4Szhangyi (F) 282395f1fda4Szhangyi (F) /* 282495f1fda4Szhangyi (F) * Turn on quotas which were not enabled for read-only mounts if 282595f1fda4Szhangyi (F) * filesystem has quota feature, so that they are updated correctly. 282695f1fda4Szhangyi (F) */ 28271751e8a6SLinus Torvalds if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { 282895f1fda4Szhangyi (F) int ret = ext4_enable_quotas(sb); 282995f1fda4Szhangyi (F) 283095f1fda4Szhangyi (F) if (!ret) 283195f1fda4Szhangyi (F) quota_update = 1; 283295f1fda4Szhangyi (F) else 283395f1fda4Szhangyi (F) ext4_msg(sb, KERN_ERR, 283495f1fda4Szhangyi (F) "Cannot turn on quotas: error %d", ret); 283595f1fda4Szhangyi (F) } 283695f1fda4Szhangyi (F) 283795f1fda4Szhangyi (F) /* Turn on journaled quotas used for old sytle */ 2838a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2839617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2840617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 284195f1fda4Szhangyi (F) 284295f1fda4Szhangyi (F) if (!ret) 284395f1fda4Szhangyi (F) quota_update = 1; 284495f1fda4Szhangyi (F) else 2845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2846b31e1552SEric Sandeen "Cannot turn on journaled " 284795f1fda4Szhangyi (F) "quota: type %d: error %d", i, ret); 2848ac27a0ecSDave Kleikamp } 2849ac27a0ecSDave Kleikamp } 2850ac27a0ecSDave Kleikamp #endif 2851ac27a0ecSDave Kleikamp 2852ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2853ac27a0ecSDave Kleikamp struct inode *inode; 2854ac27a0ecSDave Kleikamp 2855c65d5c6cSVegard Nossum /* 2856c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2857c65d5c6cSVegard Nossum * so, skip the rest. 2858c65d5c6cSVegard Nossum */ 2859c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2860c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2861c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2862c65d5c6cSVegard Nossum break; 2863c65d5c6cSVegard Nossum } 2864c65d5c6cSVegard Nossum 286597bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 286697bd42b9SJosef Bacik if (IS_ERR(inode)) { 2867ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2868ac27a0ecSDave Kleikamp break; 2869ac27a0ecSDave Kleikamp } 2870ac27a0ecSDave Kleikamp 2871617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2872871a2931SChristoph Hellwig dquot_initialize(inode); 2873ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2874566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2875b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2876b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 287746e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2878e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2879ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 28805955102cSAl Viro inode_lock(inode); 288155f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 28822c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 28832c98eb5eSTheodore Ts'o if (ret) 28842c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 28855955102cSAl Viro inode_unlock(inode); 2886ac27a0ecSDave Kleikamp nr_truncates++; 2887ac27a0ecSDave Kleikamp } else { 2888566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2889b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2890b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 289146e665e9SHarvey Harrison __func__, inode->i_ino); 2892ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2893ac27a0ecSDave Kleikamp inode->i_ino); 2894ac27a0ecSDave Kleikamp nr_orphans++; 2895ac27a0ecSDave Kleikamp } 2896ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2897ac27a0ecSDave Kleikamp } 2898ac27a0ecSDave Kleikamp 2899ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2900ac27a0ecSDave Kleikamp 2901ac27a0ecSDave Kleikamp if (nr_orphans) 2902b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2903b31e1552SEric Sandeen PLURAL(nr_orphans)); 2904ac27a0ecSDave Kleikamp if (nr_truncates) 2905b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2906b31e1552SEric Sandeen PLURAL(nr_truncates)); 2907ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 290895f1fda4Szhangyi (F) /* Turn off quotas if they were enabled for orphan cleanup */ 290995f1fda4Szhangyi (F) if (quota_update) { 2910a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 291195f1fda4Szhangyi (F) if (sb_dqopt(sb)->files[i]) 2912287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2913ac27a0ecSDave Kleikamp } 291495f1fda4Szhangyi (F) } 2915ac27a0ecSDave Kleikamp #endif 29161751e8a6SLinus Torvalds sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 2917ac27a0ecSDave Kleikamp } 29180b8e58a1SAndreas Dilger 2919cd2291a4SEric Sandeen /* 2920cd2291a4SEric Sandeen * Maximal extent format file size. 2921cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2922cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2923cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2924cd2291a4SEric Sandeen * so that won't be a limiting factor. 2925cd2291a4SEric Sandeen * 2926f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2927f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2928f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2929f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2930f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2931f17722f9SLukas Czerner * 2932cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2933cd2291a4SEric Sandeen */ 2934f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2935cd2291a4SEric Sandeen { 2936cd2291a4SEric Sandeen loff_t res; 2937cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2938cd2291a4SEric Sandeen 293972deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 294072deb455SChristoph Hellwig 294172deb455SChristoph Hellwig if (!has_huge_files) { 2942cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2943cd2291a4SEric Sandeen 2944cd2291a4SEric Sandeen /* total blocks in file system block size */ 2945cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2946cd2291a4SEric Sandeen upper_limit <<= blkbits; 2947cd2291a4SEric Sandeen } 2948cd2291a4SEric Sandeen 2949f17722f9SLukas Czerner /* 2950f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2951f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2952f17722f9SLukas Czerner * size 2953f17722f9SLukas Czerner */ 2954f17722f9SLukas Czerner res = (1LL << 32) - 1; 2955cd2291a4SEric Sandeen res <<= blkbits; 2956cd2291a4SEric Sandeen 2957cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2958cd2291a4SEric Sandeen if (res > upper_limit) 2959cd2291a4SEric Sandeen res = upper_limit; 2960cd2291a4SEric Sandeen 2961cd2291a4SEric Sandeen return res; 2962cd2291a4SEric Sandeen } 2963ac27a0ecSDave Kleikamp 2964ac27a0ecSDave Kleikamp /* 2965cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 29660fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 29670fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2968ac27a0ecSDave Kleikamp */ 2969f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2970ac27a0ecSDave Kleikamp { 2971617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 29720fc1b451SAneesh Kumar K.V int meta_blocks; 29730fc1b451SAneesh Kumar K.V loff_t upper_limit; 29740b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 29750b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 29760b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 29770b8e58a1SAndreas Dilger * 29780b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 29790b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 29800fc1b451SAneesh Kumar K.V */ 29810fc1b451SAneesh Kumar K.V 298272deb455SChristoph Hellwig if (!has_huge_files) { 29830fc1b451SAneesh Kumar K.V /* 298472deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 298572deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 298672deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 29870fc1b451SAneesh Kumar K.V */ 29880fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 29890fc1b451SAneesh Kumar K.V 29900fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 29910fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 29920fc1b451SAneesh Kumar K.V 29930fc1b451SAneesh Kumar K.V } else { 29948180a562SAneesh Kumar K.V /* 29958180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 29968180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 29978180a562SAneesh Kumar K.V * represent total number of blocks in 29988180a562SAneesh Kumar K.V * file system block size 29998180a562SAneesh Kumar K.V */ 30000fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 30010fc1b451SAneesh Kumar K.V 30020fc1b451SAneesh Kumar K.V } 30030fc1b451SAneesh Kumar K.V 30040fc1b451SAneesh Kumar K.V /* indirect blocks */ 30050fc1b451SAneesh Kumar K.V meta_blocks = 1; 30060fc1b451SAneesh Kumar K.V /* double indirect blocks */ 30070fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 30080fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 30090fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 30100fc1b451SAneesh Kumar K.V 30110fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 30120fc1b451SAneesh Kumar K.V upper_limit <<= bits; 3013ac27a0ecSDave Kleikamp 3014ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 3015ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 3016ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 3017ac27a0ecSDave Kleikamp res <<= bits; 3018ac27a0ecSDave Kleikamp if (res > upper_limit) 3019ac27a0ecSDave Kleikamp res = upper_limit; 30200fc1b451SAneesh Kumar K.V 30210fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 30220fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 30230fc1b451SAneesh Kumar K.V 3024ac27a0ecSDave Kleikamp return res; 3025ac27a0ecSDave Kleikamp } 3026ac27a0ecSDave Kleikamp 3027617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 302870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 3029ac27a0ecSDave Kleikamp { 3030617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3031fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 3032ac27a0ecSDave Kleikamp int has_super = 0; 3033ac27a0ecSDave Kleikamp 3034ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 3035ac27a0ecSDave Kleikamp 3036e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 303770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 3038ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 3039617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 3040ac27a0ecSDave Kleikamp has_super = 1; 30410b8e58a1SAndreas Dilger 3042bd63f6b0SDarrick J. Wong /* 3043bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 3044bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 3045bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 3046bd63f6b0SDarrick J. Wong * compensate. 3047bd63f6b0SDarrick J. Wong */ 3048bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 304949598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 3050bd63f6b0SDarrick J. Wong has_super++; 3051bd63f6b0SDarrick J. Wong 3052617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 3053ac27a0ecSDave Kleikamp } 3054ac27a0ecSDave Kleikamp 3055c9de560dSAlex Tomas /** 3056c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 3057c9de560dSAlex Tomas * @sbi: In memory super block info 3058c9de560dSAlex Tomas * 3059c9de560dSAlex Tomas * If we have specified it via mount option, then 3060c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 3061c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 3062c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 3063c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 3064c9de560dSAlex Tomas * 3065c9de560dSAlex Tomas */ 3066c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 3067c9de560dSAlex Tomas { 3068c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 3069c9de560dSAlex Tomas unsigned long stripe_width = 3070c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 30713eb08658SDan Ehrenberg int ret; 3072c9de560dSAlex Tomas 3073c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 30743eb08658SDan Ehrenberg ret = sbi->s_stripe; 30755469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 30763eb08658SDan Ehrenberg ret = stripe_width; 30775469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 30783eb08658SDan Ehrenberg ret = stride; 30793eb08658SDan Ehrenberg else 30803eb08658SDan Ehrenberg ret = 0; 3081c9de560dSAlex Tomas 30823eb08658SDan Ehrenberg /* 30833eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 30843eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 30853eb08658SDan Ehrenberg */ 30863eb08658SDan Ehrenberg if (ret <= 1) 30873eb08658SDan Ehrenberg ret = 0; 3088c9de560dSAlex Tomas 30893eb08658SDan Ehrenberg return ret; 3090c9de560dSAlex Tomas } 3091ac27a0ecSDave Kleikamp 3092a13fb1a4SEric Sandeen /* 3093a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 3094a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 3095a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 3096a13fb1a4SEric Sandeen * 0 if it cannot be. 3097a13fb1a4SEric Sandeen */ 3098a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 3099a13fb1a4SEric Sandeen { 3100e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 3101a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 3102a13fb1a4SEric Sandeen "Couldn't mount because of " 3103a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3104a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 3105a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 3106a13fb1a4SEric Sandeen return 0; 3107a13fb1a4SEric Sandeen } 3108a13fb1a4SEric Sandeen 3109c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 3110c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 3111c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3112c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 3113c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 3114c83ad55eSGabriel Krisman Bertazi return 0; 3115c83ad55eSGabriel Krisman Bertazi } 3116c83ad55eSGabriel Krisman Bertazi #endif 3117c83ad55eSGabriel Krisman Bertazi 3118a13fb1a4SEric Sandeen if (readonly) 3119a13fb1a4SEric Sandeen return 1; 3120a13fb1a4SEric Sandeen 3121e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 31222cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 31231751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 31242cb5cc8bSDarrick J. Wong return 1; 31252cb5cc8bSDarrick J. Wong } 31262cb5cc8bSDarrick J. Wong 3127a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 3128e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 3129a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 3130a13fb1a4SEric Sandeen "unsupported optional features (%x)", 3131a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 3132a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3133a13fb1a4SEric Sandeen return 0; 3134a13fb1a4SEric Sandeen } 3135e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 3136bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 3137bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 3138bab08ab9STheodore Ts'o "extents feature\n"); 3139bab08ab9STheodore Ts'o return 0; 3140bab08ab9STheodore Ts'o } 31417c319d32SAditya Kali 31429db176bcSJan Kara #if !IS_ENABLED(CONFIG_QUOTA) || !IS_ENABLED(CONFIG_QFMT_V2) 3143d65d87a0STheodore Ts'o if (!readonly && (ext4_has_feature_quota(sb) || 3144d65d87a0STheodore Ts'o ext4_has_feature_project(sb))) { 31457c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 3146d65d87a0STheodore Ts'o "The kernel was not built with CONFIG_QUOTA and CONFIG_QFMT_V2"); 3147689c958cSLi Xi return 0; 3148689c958cSLi Xi } 31497c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 3150a13fb1a4SEric Sandeen return 1; 3151a13fb1a4SEric Sandeen } 3152a13fb1a4SEric Sandeen 315366e61a9eSTheodore Ts'o /* 315466e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 315566e61a9eSTheodore Ts'o * on the file system 315666e61a9eSTheodore Ts'o */ 3157235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 315866e61a9eSTheodore Ts'o { 3159235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 3160235699a8SKees Cook struct super_block *sb = sbi->s_sb; 3161235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 316266e61a9eSTheodore Ts'o 316366e61a9eSTheodore Ts'o if (es->s_error_count) 3164ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 3165ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 316666e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 316766e61a9eSTheodore Ts'o if (es->s_first_error_time) { 31686a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 31696a0678a7SArnd Bergmann sb->s_id, 31706a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 317166e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 317266e61a9eSTheodore Ts'o es->s_first_error_func, 317366e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 317466e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3175651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 317666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 317766e61a9eSTheodore Ts'o if (es->s_first_error_block) 3178651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 317966e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3180651e1c3bSJoe Perches printk(KERN_CONT "\n"); 318166e61a9eSTheodore Ts'o } 318266e61a9eSTheodore Ts'o if (es->s_last_error_time) { 31836a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 31846a0678a7SArnd Bergmann sb->s_id, 31856a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 318666e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 318766e61a9eSTheodore Ts'o es->s_last_error_func, 318866e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 318966e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3190651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 319166e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 319266e61a9eSTheodore Ts'o if (es->s_last_error_block) 3193651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 319466e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3195651e1c3bSJoe Perches printk(KERN_CONT "\n"); 319666e61a9eSTheodore Ts'o } 319766e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 319866e61a9eSTheodore Ts'o } 319966e61a9eSTheodore Ts'o 3200bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3201bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3202bfff6873SLukas Czerner { 3203bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3204bfff6873SLukas Czerner ext4_group_t group, ngroups; 3205bfff6873SLukas Czerner struct super_block *sb; 3206bfff6873SLukas Czerner unsigned long timeout = 0; 3207bfff6873SLukas Czerner int ret = 0; 3208bfff6873SLukas Czerner 3209bfff6873SLukas Czerner sb = elr->lr_super; 3210bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 3211bfff6873SLukas Czerner 3212bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 3213bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3214bfff6873SLukas Czerner if (!gdp) { 3215bfff6873SLukas Czerner ret = 1; 3216bfff6873SLukas Czerner break; 3217bfff6873SLukas Czerner } 3218bfff6873SLukas Czerner 3219bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3220bfff6873SLukas Czerner break; 3221bfff6873SLukas Czerner } 3222bfff6873SLukas Czerner 32237f511862STheodore Ts'o if (group >= ngroups) 3224bfff6873SLukas Czerner ret = 1; 3225bfff6873SLukas Czerner 3226bfff6873SLukas Czerner if (!ret) { 3227bfff6873SLukas Czerner timeout = jiffies; 3228bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3229bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 3230bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 323151ce6511SLukas Czerner timeout = (jiffies - timeout) * 323251ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 3233bfff6873SLukas Czerner elr->lr_timeout = timeout; 3234bfff6873SLukas Czerner } 3235bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3236bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3237bfff6873SLukas Czerner } 3238bfff6873SLukas Czerner return ret; 3239bfff6873SLukas Czerner } 3240bfff6873SLukas Czerner 3241bfff6873SLukas Czerner /* 3242bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 32434ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3244bfff6873SLukas Czerner */ 3245bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3246bfff6873SLukas Czerner { 3247bfff6873SLukas Czerner struct ext4_sb_info *sbi; 3248bfff6873SLukas Czerner 3249bfff6873SLukas Czerner if (!elr) 3250bfff6873SLukas Czerner return; 3251bfff6873SLukas Czerner 3252bfff6873SLukas Czerner sbi = elr->lr_sbi; 3253bfff6873SLukas Czerner 3254bfff6873SLukas Czerner list_del(&elr->lr_request); 3255bfff6873SLukas Czerner sbi->s_li_request = NULL; 3256bfff6873SLukas Czerner kfree(elr); 3257bfff6873SLukas Czerner } 3258bfff6873SLukas Czerner 3259bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3260bfff6873SLukas Czerner { 32611bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 32621bb933fbSLukas Czerner if (!ext4_li_info) { 32631bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3264bfff6873SLukas Czerner return; 32651bb933fbSLukas Czerner } 3266bfff6873SLukas Czerner 3267bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 32681bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3269bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 32701bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3271bfff6873SLukas Czerner } 3272bfff6873SLukas Czerner 32738f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 32748f1f7453SEric Sandeen 3275bfff6873SLukas Czerner /* 3276bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3277bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3278bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3279bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3280bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3281bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3282bfff6873SLukas Czerner * next waking time and put itself into sleep. 3283bfff6873SLukas Czerner */ 3284bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3285bfff6873SLukas Czerner { 3286bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3287bfff6873SLukas Czerner struct list_head *pos, *n; 3288bfff6873SLukas Czerner struct ext4_li_request *elr; 32894ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3290bfff6873SLukas Czerner 3291bfff6873SLukas Czerner BUG_ON(NULL == eli); 3292bfff6873SLukas Czerner 3293bfff6873SLukas Czerner cont_thread: 3294bfff6873SLukas Czerner while (true) { 3295bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3296bfff6873SLukas Czerner 3297bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3298bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3299bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3300bfff6873SLukas Czerner goto exit_thread; 3301bfff6873SLukas Czerner } 3302bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3303e22834f0SDmitry Monakhov int err = 0; 3304e22834f0SDmitry Monakhov int progress = 0; 3305bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3306bfff6873SLukas Czerner lr_request); 3307bfff6873SLukas Czerner 3308e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3309e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3310e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3311e22834f0SDmitry Monakhov continue; 3312e22834f0SDmitry Monakhov } 3313e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3314e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3315e22834f0SDmitry Monakhov progress = 1; 3316e22834f0SDmitry Monakhov /* 3317e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3318e22834f0SDmitry Monakhov * be removed from the list, it is 3319e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3320e22834f0SDmitry Monakhov */ 3321e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3322e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3323e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3324e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3325e22834f0SDmitry Monakhov n = pos->next; 3326e22834f0SDmitry Monakhov } 3327e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3328e22834f0SDmitry Monakhov } 3329b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3330e22834f0SDmitry Monakhov if (err) { 3331bfff6873SLukas Czerner ext4_remove_li_request(elr); 3332bfff6873SLukas Czerner continue; 3333bfff6873SLukas Czerner } 3334e22834f0SDmitry Monakhov if (!progress) { 3335e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3336e22834f0SDmitry Monakhov (prandom_u32() 3337e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3338b2c78cd0STheodore Ts'o } 3339bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3340bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3341bfff6873SLukas Czerner } 3342bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3343bfff6873SLukas Czerner 3344a0acae0eSTejun Heo try_to_freeze(); 3345bfff6873SLukas Czerner 33464ed5c033SLukas Czerner cur = jiffies; 33474ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3348f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3349bfff6873SLukas Czerner cond_resched(); 3350bfff6873SLukas Czerner continue; 3351bfff6873SLukas Czerner } 3352bfff6873SLukas Czerner 33534ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 33544ed5c033SLukas Czerner 33558f1f7453SEric Sandeen if (kthread_should_stop()) { 33568f1f7453SEric Sandeen ext4_clear_request_list(); 33578f1f7453SEric Sandeen goto exit_thread; 33588f1f7453SEric Sandeen } 3359bfff6873SLukas Czerner } 3360bfff6873SLukas Czerner 3361bfff6873SLukas Czerner exit_thread: 3362bfff6873SLukas Czerner /* 3363bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3364bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3365bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3366bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3367bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3368bfff6873SLukas Czerner * new one. 3369bfff6873SLukas Czerner */ 3370bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3371bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3372bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3373bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3374bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3375bfff6873SLukas Czerner goto cont_thread; 3376bfff6873SLukas Czerner } 3377bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3378bfff6873SLukas Czerner kfree(ext4_li_info); 3379bfff6873SLukas Czerner ext4_li_info = NULL; 3380bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3381bfff6873SLukas Czerner 3382bfff6873SLukas Czerner return 0; 3383bfff6873SLukas Czerner } 3384bfff6873SLukas Czerner 3385bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3386bfff6873SLukas Czerner { 3387bfff6873SLukas Czerner struct list_head *pos, *n; 3388bfff6873SLukas Czerner struct ext4_li_request *elr; 3389bfff6873SLukas Czerner 3390bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3391bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3392bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3393bfff6873SLukas Czerner lr_request); 3394bfff6873SLukas Czerner ext4_remove_li_request(elr); 3395bfff6873SLukas Czerner } 3396bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3397bfff6873SLukas Czerner } 3398bfff6873SLukas Czerner 3399bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3400bfff6873SLukas Czerner { 34018f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 34028f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 34038f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 34048f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3405bfff6873SLukas Czerner ext4_clear_request_list(); 3406bfff6873SLukas Czerner kfree(ext4_li_info); 3407bfff6873SLukas Czerner ext4_li_info = NULL; 340892b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3409bfff6873SLukas Czerner "initialization thread\n", 3410bfff6873SLukas Czerner err); 3411bfff6873SLukas Czerner return err; 3412bfff6873SLukas Czerner } 3413bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3414bfff6873SLukas Czerner return 0; 3415bfff6873SLukas Czerner } 3416bfff6873SLukas Czerner 3417bfff6873SLukas Czerner /* 3418bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3419bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3420bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3421bfff6873SLukas Czerner * groups and return total number of groups. 3422bfff6873SLukas Czerner */ 3423bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3424bfff6873SLukas Czerner { 3425bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3426bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3427bfff6873SLukas Czerner 34288844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 34298844618dSTheodore Ts'o return ngroups; 34308844618dSTheodore Ts'o 3431bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3432bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3433bfff6873SLukas Czerner if (!gdp) 3434bfff6873SLukas Czerner continue; 3435bfff6873SLukas Czerner 343650122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3437bfff6873SLukas Czerner break; 3438bfff6873SLukas Czerner } 3439bfff6873SLukas Czerner 3440bfff6873SLukas Czerner return group; 3441bfff6873SLukas Czerner } 3442bfff6873SLukas Czerner 3443bfff6873SLukas Czerner static int ext4_li_info_new(void) 3444bfff6873SLukas Czerner { 3445bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3446bfff6873SLukas Czerner 3447bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3448bfff6873SLukas Czerner if (!eli) 3449bfff6873SLukas Czerner return -ENOMEM; 3450bfff6873SLukas Czerner 3451bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3452bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3453bfff6873SLukas Czerner 3454bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3455bfff6873SLukas Czerner 3456bfff6873SLukas Czerner ext4_li_info = eli; 3457bfff6873SLukas Czerner 3458bfff6873SLukas Czerner return 0; 3459bfff6873SLukas Czerner } 3460bfff6873SLukas Czerner 3461bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3462bfff6873SLukas Czerner ext4_group_t start) 3463bfff6873SLukas Czerner { 3464bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3465bfff6873SLukas Czerner struct ext4_li_request *elr; 3466bfff6873SLukas Czerner 3467bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3468bfff6873SLukas Czerner if (!elr) 3469bfff6873SLukas Czerner return NULL; 3470bfff6873SLukas Czerner 3471bfff6873SLukas Czerner elr->lr_super = sb; 3472bfff6873SLukas Czerner elr->lr_sbi = sbi; 3473bfff6873SLukas Czerner elr->lr_next_group = start; 3474bfff6873SLukas Czerner 3475bfff6873SLukas Czerner /* 3476bfff6873SLukas Czerner * Randomize first schedule time of the request to 3477bfff6873SLukas Czerner * spread the inode table initialization requests 3478bfff6873SLukas Czerner * better. 3479bfff6873SLukas Czerner */ 3480dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3481dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3482bfff6873SLukas Czerner return elr; 3483bfff6873SLukas Czerner } 3484bfff6873SLukas Czerner 34857f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3486bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3487bfff6873SLukas Czerner { 3488bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 34897f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 349049598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 34916c5a6cb9SAndrew Morton int ret = 0; 3492bfff6873SLukas Czerner 34937f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 349451ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 349551ce6511SLukas Czerner /* 349651ce6511SLukas Czerner * Reset timeout so it can be computed again, because 349751ce6511SLukas Czerner * s_li_wait_mult might have changed. 349851ce6511SLukas Czerner */ 349951ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 35007f511862STheodore Ts'o goto out; 350151ce6511SLukas Czerner } 3502bfff6873SLukas Czerner 3503bc98a42cSDavid Howells if (first_not_zeroed == ngroups || sb_rdonly(sb) || 350455ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 35057f511862STheodore Ts'o goto out; 3506bfff6873SLukas Czerner 3507bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 35087f511862STheodore Ts'o if (!elr) { 35097f511862STheodore Ts'o ret = -ENOMEM; 35107f511862STheodore Ts'o goto out; 35117f511862STheodore Ts'o } 3512bfff6873SLukas Czerner 3513bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3514bfff6873SLukas Czerner ret = ext4_li_info_new(); 3515bfff6873SLukas Czerner if (ret) 3516bfff6873SLukas Czerner goto out; 3517bfff6873SLukas Czerner } 3518bfff6873SLukas Czerner 3519bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3520bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3521bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3522bfff6873SLukas Czerner 3523bfff6873SLukas Czerner sbi->s_li_request = elr; 352446e4690bSTao Ma /* 352546e4690bSTao Ma * set elr to NULL here since it has been inserted to 352646e4690bSTao Ma * the request_list and the removal and free of it is 352746e4690bSTao Ma * handled by ext4_clear_request_list from now on. 352846e4690bSTao Ma */ 352946e4690bSTao Ma elr = NULL; 3530bfff6873SLukas Czerner 3531bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3532bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3533bfff6873SLukas Czerner if (ret) 3534bfff6873SLukas Czerner goto out; 3535bfff6873SLukas Czerner } 3536bfff6873SLukas Czerner out: 3537bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3538beed5ecbSNicolas Kaiser if (ret) 3539bfff6873SLukas Czerner kfree(elr); 3540bfff6873SLukas Czerner return ret; 3541bfff6873SLukas Czerner } 3542bfff6873SLukas Czerner 3543bfff6873SLukas Czerner /* 3544bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3545bfff6873SLukas Czerner * module unload. 3546bfff6873SLukas Czerner */ 3547bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3548bfff6873SLukas Czerner { 3549bfff6873SLukas Czerner /* 3550bfff6873SLukas Czerner * If thread exited earlier 3551bfff6873SLukas Czerner * there's nothing to be done. 3552bfff6873SLukas Czerner */ 35538f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3554bfff6873SLukas Czerner return; 3555bfff6873SLukas Czerner 35568f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3557bfff6873SLukas Czerner } 3558bfff6873SLukas Czerner 355925ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 356025ed6e8aSDarrick J. Wong { 356125ed6e8aSDarrick J. Wong int ret = 1; 356225ed6e8aSDarrick J. Wong int compat, incompat; 356325ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 356425ed6e8aSDarrick J. Wong 35659aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3566db9ee220SDarrick J. Wong /* journal checksum v3 */ 356725ed6e8aSDarrick J. Wong compat = 0; 3568db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 356925ed6e8aSDarrick J. Wong } else { 357025ed6e8aSDarrick J. Wong /* journal checksum v1 */ 357125ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 357225ed6e8aSDarrick J. Wong incompat = 0; 357325ed6e8aSDarrick J. Wong } 357425ed6e8aSDarrick J. Wong 3575feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3576feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3577feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3578feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 357925ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 358025ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 358125ed6e8aSDarrick J. Wong compat, 0, 358225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 358325ed6e8aSDarrick J. Wong incompat); 358425ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 358525ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 358625ed6e8aSDarrick J. Wong compat, 0, 358725ed6e8aSDarrick J. Wong incompat); 358825ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 358925ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 359025ed6e8aSDarrick J. Wong } else { 3591feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3592feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 359325ed6e8aSDarrick J. Wong } 359425ed6e8aSDarrick J. Wong 359525ed6e8aSDarrick J. Wong return ret; 359625ed6e8aSDarrick J. Wong } 359725ed6e8aSDarrick J. Wong 3598952fc18eSTheodore Ts'o /* 3599952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3600952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3601952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3602952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3603952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3604952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3605952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3606952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3607952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3608952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3609952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3610952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3611952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3612952fc18eSTheodore Ts'o */ 3613952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3614952fc18eSTheodore Ts'o char *buf) 3615952fc18eSTheodore Ts'o { 3616952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3617952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3618952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3619952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3620952fc18eSTheodore Ts'o int s, j, count = 0; 3621952fc18eSTheodore Ts'o 3622e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 36230548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 36240548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 36250548bbb8STheodore Ts'o 3626952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3627952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3628952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3629952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3630952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3631952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3632952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3633952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3634952fc18eSTheodore Ts'o count++; 3635952fc18eSTheodore Ts'o } 3636952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3637952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3638952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3639952fc18eSTheodore Ts'o count++; 3640952fc18eSTheodore Ts'o } 3641952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3642952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3643952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3644952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3645952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3646952fc18eSTheodore Ts'o count++; 3647952fc18eSTheodore Ts'o } 3648952fc18eSTheodore Ts'o if (i != grp) 3649952fc18eSTheodore Ts'o continue; 3650952fc18eSTheodore Ts'o s = 0; 3651952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3652952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3653952fc18eSTheodore Ts'o count++; 3654952fc18eSTheodore Ts'o } 3655c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3656c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3657c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3658c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3659c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3660952fc18eSTheodore Ts'o } 3661c48ae41bSTheodore Ts'o count += j; 3662c48ae41bSTheodore Ts'o for (; j > 0; j--) 3663c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3664952fc18eSTheodore Ts'o } 3665952fc18eSTheodore Ts'o if (!count) 3666952fc18eSTheodore Ts'o return 0; 3667952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3668952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3669952fc18eSTheodore Ts'o } 3670952fc18eSTheodore Ts'o 3671952fc18eSTheodore Ts'o /* 3672952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3673952fc18eSTheodore Ts'o */ 3674952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3675952fc18eSTheodore Ts'o { 3676952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3677952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 36783c816dedSEric Whitney struct inode *j_inode; 36793c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3680952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3681952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 36824fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3683952fc18eSTheodore Ts'o 3684952fc18eSTheodore Ts'o if (!buf) 3685952fc18eSTheodore Ts'o return -ENOMEM; 3686952fc18eSTheodore Ts'o 3687952fc18eSTheodore Ts'o /* 3688952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3689952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3690952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3691952fc18eSTheodore Ts'o */ 3692952fc18eSTheodore Ts'o 3693952fc18eSTheodore Ts'o /* 3694952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3695952fc18eSTheodore Ts'o */ 3696952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3697952fc18eSTheodore Ts'o 3698952fc18eSTheodore Ts'o /* 3699952fc18eSTheodore Ts'o * Add the overhead found in each block group 3700952fc18eSTheodore Ts'o */ 3701952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3702952fc18eSTheodore Ts'o int blks; 3703952fc18eSTheodore Ts'o 3704952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3705952fc18eSTheodore Ts'o overhead += blks; 3706952fc18eSTheodore Ts'o if (blks) 3707952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3708952fc18eSTheodore Ts'o cond_resched(); 3709952fc18eSTheodore Ts'o } 37103c816dedSEric Whitney 37113c816dedSEric Whitney /* 37123c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 37133c816dedSEric Whitney * loaded or not 37143c816dedSEric Whitney */ 3715b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3716810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 3717f1eec3b0SRitesh Harjani else if (ext4_has_feature_journal(sb) && !sbi->s_journal && j_inum) { 3718f1eec3b0SRitesh Harjani /* j_inum for internal journal is non-zero */ 37193c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 37203c816dedSEric Whitney if (j_inode) { 37213c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 37223c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 37233c816dedSEric Whitney iput(j_inode); 37243c816dedSEric Whitney } else { 37253c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 37263c816dedSEric Whitney } 37273c816dedSEric Whitney } 3728952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3729952fc18eSTheodore Ts'o smp_wmb(); 3730952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3731952fc18eSTheodore Ts'o return 0; 3732952fc18eSTheodore Ts'o } 3733952fc18eSTheodore Ts'o 3734b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 373527dd4385SLukas Czerner { 373627dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3737b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 373827dd4385SLukas Czerner 373927dd4385SLukas Czerner /* 374030fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 374130fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 374230fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 374330fac0f7SJan Kara * to keep ext2/3 backward compatibility. 374430fac0f7SJan Kara */ 3745e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3746b5799018STheodore Ts'o return; 374730fac0f7SJan Kara /* 374827dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 374927dd4385SLukas Czerner * This should cover the situations where we can not afford to run 375027dd4385SLukas Czerner * out of space like for example punch hole, or converting 3751556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 375227dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 375327dd4385SLukas Czerner * very rare. 375427dd4385SLukas Czerner */ 3755b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3756b5799018STheodore Ts'o sbi->s_cluster_bits); 375727dd4385SLukas Czerner 375827dd4385SLukas Czerner do_div(resv_clusters, 50); 375927dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 376027dd4385SLukas Czerner 3761b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 376227dd4385SLukas Czerner } 376327dd4385SLukas Czerner 3764617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3765ac27a0ecSDave Kleikamp { 37665e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 3767d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 37681d0c3924STheodore Ts'o struct buffer_head *bh, **group_desc; 3769617ba13bSMingming Cao struct ext4_super_block *es = NULL; 37705aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 37717c990728SSuraj Jitindar Singh struct flex_groups **flex_groups; 3772617ba13bSMingming Cao ext4_fsblk_t block; 3773617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 377470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3775ac27a0ecSDave Kleikamp unsigned long offset = 0; 3776ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3777ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3778ac27a0ecSDave Kleikamp struct inode *root; 37790390131bSFrank Mayhar const char *descr; 3780dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3781281b5995STheodore Ts'o int blocksize, clustersize; 37824ec11028STheodore Ts'o unsigned int db_count; 37834ec11028STheodore Ts'o unsigned int i; 3784ef5fd681SKaixu Xia int needs_recovery, has_huge_files; 3785bd81d8eeSLaurent Vivier __u64 blocks_count; 378607aa2ea1SLukas Czerner int err = 0; 3787b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3788bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3789ac27a0ecSDave Kleikamp 37905aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 37915aee0f8aSTheodore Ts'o goto out_free_base; 3792705895b6SPekka Enberg 3793aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 3794705895b6SPekka Enberg sbi->s_blockgroup_lock = 3795705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 37965aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 37975aee0f8aSTheodore Ts'o goto out_free_base; 37985aee0f8aSTheodore Ts'o 3799ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 38002c0544b2STheodore Ts'o sbi->s_sb = sb; 3801240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3802d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3803f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3804f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3805dbae2c55SMichael Callahan part_stat_read(sb->s_bdev->bd_part, sectors[STAT_WRITE]); 3806ac27a0ecSDave Kleikamp 38079f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3808ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 38099f6200bbSTheodore Ts'o 381007aa2ea1SLukas Czerner /* -EINVAL is default */ 3811dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3812617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3813ac27a0ecSDave Kleikamp if (!blocksize) { 3814b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3815ac27a0ecSDave Kleikamp goto out_fail; 3816ac27a0ecSDave Kleikamp } 3817ac27a0ecSDave Kleikamp 3818ac27a0ecSDave Kleikamp /* 3819617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3820ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3821ac27a0ecSDave Kleikamp */ 3822617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 382370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 382470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3825ac27a0ecSDave Kleikamp } else { 382670bbb3e0SAndrew Morton logical_sb_block = sb_block; 3827ac27a0ecSDave Kleikamp } 3828ac27a0ecSDave Kleikamp 3829a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3830b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3831ac27a0ecSDave Kleikamp goto out_fail; 3832ac27a0ecSDave Kleikamp } 3833ac27a0ecSDave Kleikamp /* 3834ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3835617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3836ac27a0ecSDave Kleikamp */ 38372716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3838ac27a0ecSDave Kleikamp sbi->s_es = es; 3839ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3840617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3841617ba13bSMingming Cao goto cantfind_ext4; 3842afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3843ac27a0ecSDave Kleikamp 3844feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3845e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3846e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3847363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3848feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3849feb0ab32SDarrick J. Wong 3850d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3851d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3852d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3853d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3854d25425f8SDarrick J. Wong silent = 1; 3855d25425f8SDarrick J. Wong goto cantfind_ext4; 3856d25425f8SDarrick J. Wong } 3857d25425f8SDarrick J. Wong 38580441984aSDarrick J. Wong /* Load the checksum driver */ 38590441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 38600441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 38610441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 38620441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 38630441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 38640441984aSDarrick J. Wong goto failed_mount; 38650441984aSDarrick J. Wong } 38660441984aSDarrick J. Wong 3867a9c47317SDarrick J. Wong /* Check superblock checksum */ 3868a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3869a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3870a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3871a9c47317SDarrick J. Wong silent = 1; 38726a797d27SDarrick J. Wong ret = -EFSBADCRC; 3873a9c47317SDarrick J. Wong goto cantfind_ext4; 3874a9c47317SDarrick J. Wong } 3875a9c47317SDarrick J. Wong 3876a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3877e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 38788c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 3879dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 3880a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3881a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3882a9c47317SDarrick J. Wong 3883ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3884ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3885fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3886617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3887fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 388887f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3889fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3890617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3891fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3892ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3893fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 389403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3895fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 38962e7842b8SHugh Dickins #endif 389798c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 389898c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 389998c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 390098c1a759SDarrick J. Wong 3901617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3902fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3903617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3904fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3905617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3906fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3907ac27a0ecSDave Kleikamp 3908617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3909fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3910bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3911fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3912bb4f397aSAneesh Kumar K.V else 3913fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 391445f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3915fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 39168b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3917fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3918ac27a0ecSDave Kleikamp 391908cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 392008cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 392130773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 392230773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 392330773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3924ac27a0ecSDave Kleikamp 39258b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3926fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3927ac27a0ecSDave Kleikamp 39281e2462f9SMingming Cao /* 3929dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3930dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3931dd919b98SAneesh Kumar K.V */ 3932bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 39338b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3934fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3935dd919b98SAneesh Kumar K.V 393651ce6511SLukas Czerner /* 393751ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 393851ce6511SLukas Czerner * no mount option specified. 393951ce6511SLukas Czerner */ 394051ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 394151ce6511SLukas Czerner 39424f97a681STheodore Ts'o blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3943626b035bSRitesh Harjani 3944626b035bSRitesh Harjani if (blocksize == PAGE_SIZE) 3945626b035bSRitesh Harjani set_opt(sb, DIOREAD_NOLOCK); 3946626b035bSRitesh Harjani 39474f97a681STheodore Ts'o if (blocksize < EXT4_MIN_BLOCK_SIZE || 39484f97a681STheodore Ts'o blocksize > EXT4_MAX_BLOCK_SIZE) { 39494f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, 39504f97a681STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 39514f97a681STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 39524f97a681STheodore Ts'o goto failed_mount; 39534f97a681STheodore Ts'o } 39544f97a681STheodore Ts'o 39559803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 39569803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 39579803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 39589803387cSTheodore Ts'o } else { 39599803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 39609803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 39619803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 39629803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 39639803387cSTheodore Ts'o sbi->s_first_ino); 39649803387cSTheodore Ts'o goto failed_mount; 39659803387cSTheodore Ts'o } 39669803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 39679803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 39689803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 39699803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 39709803387cSTheodore Ts'o "unsupported inode size: %d", 39719803387cSTheodore Ts'o sbi->s_inode_size); 39724f97a681STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocksize: %d", blocksize); 39739803387cSTheodore Ts'o goto failed_mount; 39749803387cSTheodore Ts'o } 39759803387cSTheodore Ts'o /* 39769803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 39779803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 39789803387cSTheodore Ts'o * field should suffice to ensure we have extra space 39799803387cSTheodore Ts'o * for all three. 39809803387cSTheodore Ts'o */ 39819803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 39829803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 39839803387cSTheodore Ts'o sb->s_time_gran = 1; 39849803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 39859803387cSTheodore Ts'o } else { 39869803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 39879803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 39889803387cSTheodore Ts'o } 39899803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 39909803387cSTheodore Ts'o } 39919803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 39929803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 39939803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 39949803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 39959803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 39969803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 39979803387cSTheodore Ts'o 39989803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 39999803387cSTheodore Ts'o if (v > max) { 40009803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 40019803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 40029803387cSTheodore Ts'o goto failed_mount; 40039803387cSTheodore Ts'o } 40049803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 40059803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 40069803387cSTheodore Ts'o 40079803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 40089803387cSTheodore Ts'o if (v > max) { 40099803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 40109803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 40119803387cSTheodore Ts'o goto failed_mount; 40129803387cSTheodore Ts'o } 40139803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 40149803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 40159803387cSTheodore Ts'o } 40169803387cSTheodore Ts'o } 40179803387cSTheodore Ts'o 40185aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 40195aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 40205aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 40215aee0f8aSTheodore Ts'o GFP_KERNEL); 40225aee0f8aSTheodore Ts'o if (!s_mount_opts) 40235aee0f8aSTheodore Ts'o goto failed_mount; 40245aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 40255aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 40268b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 40278b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 40285aee0f8aSTheodore Ts'o s_mount_opts); 40295aee0f8aSTheodore Ts'o } 40305aee0f8aSTheodore Ts'o kfree(s_mount_opts); 40318b67f04aSTheodore Ts'o } 40325a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 4033b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 4034661aa520SEric Sandeen &journal_ioprio, 0)) 4035ac27a0ecSDave Kleikamp goto failed_mount; 4036ac27a0ecSDave Kleikamp 4037c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4038c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb) && !sbi->s_encoding) { 4039c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 4040c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 4041c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 4042c83ad55eSGabriel Krisman Bertazi 4043c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_encrypt(sb)) { 4044c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4045c83ad55eSGabriel Krisman Bertazi "Can't mount with encoding and encryption"); 4046c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4047c83ad55eSGabriel Krisman Bertazi } 4048c83ad55eSGabriel Krisman Bertazi 4049c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 4050c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 4051c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4052c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 4053c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4054c83ad55eSGabriel Krisman Bertazi } 4055c83ad55eSGabriel Krisman Bertazi 4056c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 4057c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 4058c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 4059c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 4060c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 4061c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 4062c83ad55eSGabriel Krisman Bertazi encoding_flags); 4063c83ad55eSGabriel Krisman Bertazi goto failed_mount; 4064c83ad55eSGabriel Krisman Bertazi } 4065c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 4066c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 4067c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 4068c83ad55eSGabriel Krisman Bertazi 4069c83ad55eSGabriel Krisman Bertazi sbi->s_encoding = encoding; 4070c83ad55eSGabriel Krisman Bertazi sbi->s_encoding_flags = encoding_flags; 4071c83ad55eSGabriel Krisman Bertazi } 4072c83ad55eSGabriel Krisman Bertazi #endif 4073c83ad55eSGabriel Krisman Bertazi 407456889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 4075244adf64STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting with data=journal disables delayed allocation, dioread_nolock, and O_DIRECT support!\n"); 4076781c036bSKaixu Xia /* can't mount with both data=journal and dioread_nolock. */ 4077244adf64STheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 407856889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 407956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 408056889787STheodore Ts'o "both data=journal and delalloc"); 408156889787STheodore Ts'o goto failed_mount; 408256889787STheodore Ts'o } 4083fc626fe3SIra Weiny if (test_opt(sb, DAX_ALWAYS)) { 4084923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4085923ae0ffSRoss Zwisler "both data=journal and dax"); 4086923ae0ffSRoss Zwisler goto failed_mount; 4087923ae0ffSRoss Zwisler } 408873b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 408973b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 409073b92a2aSSergey Karamov "encrypted files will use data=ordered " 409173b92a2aSSergey Karamov "instead of data journaling mode"); 409273b92a2aSSergey Karamov } 409356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 409456889787STheodore Ts'o clear_opt(sb, DELALLOC); 4095001e4a87STejun Heo } else { 4096001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 409756889787STheodore Ts'o } 409856889787STheodore Ts'o 40991751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 41001751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 4101ac27a0ecSDave Kleikamp 4102617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 4103e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 4104e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 4105e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 4106b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4107b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 4108b31e1552SEric Sandeen "running e2fsck is recommended"); 4109469108ffSTheodore Tso 4110ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 4111ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 4112e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 4113ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4114ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 4115ed3654ebSTheodore Ts'o goto failed_mount; 4116ed3654ebSTheodore Ts'o } 4117dec214d0STahsin Erdogan 4118dec214d0STahsin Erdogan /* 4119dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 4120dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 4121dec214d0STahsin Erdogan */ 4122dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4123dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4124dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 4125dec214d0STahsin Erdogan goto failed_mount; 4126dec214d0STahsin Erdogan } 4127ed3654ebSTheodore Ts'o } 4128ed3654ebSTheodore Ts'o 41292035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 41302035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 41312035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 41322035e776STheodore Ts'o "using the ext4 subsystem"); 41332035e776STheodore Ts'o else { 41340d9366d6SEric Sandeen /* 41350d9366d6SEric Sandeen * If we're probing be silent, if this looks like 41360d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 41370d9366d6SEric Sandeen */ 41380d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 41390d9366d6SEric Sandeen goto failed_mount; 41402035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 41412035e776STheodore Ts'o "to feature incompatibilities"); 41422035e776STheodore Ts'o goto failed_mount; 41432035e776STheodore Ts'o } 41442035e776STheodore Ts'o } 41452035e776STheodore Ts'o 41462035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 41472035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 41482035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 41492035e776STheodore Ts'o "using the ext4 subsystem"); 41502035e776STheodore Ts'o else { 41510d9366d6SEric Sandeen /* 41520d9366d6SEric Sandeen * If we're probing be silent, if this looks like 41530d9366d6SEric Sandeen * it's actually an ext4 filesystem. 41540d9366d6SEric Sandeen */ 41550d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 41560d9366d6SEric Sandeen goto failed_mount; 41572035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 41582035e776STheodore Ts'o "to feature incompatibilities"); 41592035e776STheodore Ts'o goto failed_mount; 41602035e776STheodore Ts'o } 41612035e776STheodore Ts'o } 41622035e776STheodore Ts'o 4163469108ffSTheodore Tso /* 4164ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 4165ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 4166ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 4167ac27a0ecSDave Kleikamp */ 4168bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 4169ac27a0ecSDave Kleikamp goto failed_mount; 4170a13fb1a4SEric Sandeen 41718cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 41728cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 41738cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 41748cdf3372STheodore Ts'o "Invalid log block size: %u", 41758cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4176ac27a0ecSDave Kleikamp goto failed_mount; 4177ac27a0ecSDave Kleikamp } 4178bfe0a5f4STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4179bfe0a5f4STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4180bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4181bfe0a5f4STheodore Ts'o "Invalid log cluster size: %u", 4182bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4183bfe0a5f4STheodore Ts'o goto failed_mount; 4184bfe0a5f4STheodore Ts'o } 4185ac27a0ecSDave Kleikamp 41865b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 41875b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 41885b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 41895b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 41905b9554dcSTheodore Ts'o goto failed_mount; 41915b9554dcSTheodore Ts'o } 41925b9554dcSTheodore Ts'o 4193a8ab6d38SIra Weiny if (bdev_dax_supported(sb->s_bdev, blocksize)) 4194a8ab6d38SIra Weiny set_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags); 4195a8ab6d38SIra Weiny 4196fc626fe3SIra Weiny if (sbi->s_mount_opt & EXT4_MOUNT_DAX_ALWAYS) { 4197559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4198559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4199559db4c6SRoss Zwisler " that may contain inline data"); 4200361d24d4SEric Sandeen goto failed_mount; 4201559db4c6SRoss Zwisler } 4202a8ab6d38SIra Weiny if (!test_bit(EXT4_FLAGS_BDEV_IS_DAX, &sbi->s_ext4_flags)) { 420324f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4204361d24d4SEric Sandeen "DAX unsupported by block device."); 4205361d24d4SEric Sandeen goto failed_mount; 420624f3478dSDan Williams } 4207923ae0ffSRoss Zwisler } 4208923ae0ffSRoss Zwisler 4209e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 42106ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 42116ddb2447STheodore Ts'o es->s_encryption_level); 42126ddb2447STheodore Ts'o goto failed_mount; 42136ddb2447STheodore Ts'o } 42146ddb2447STheodore Ts'o 4215ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4216ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4217ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4218b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4219ce40733cSAneesh Kumar K.V blocksize); 4220ac27a0ecSDave Kleikamp goto failed_mount; 4221ac27a0ecSDave Kleikamp } 4222ac27a0ecSDave Kleikamp 4223ac27a0ecSDave Kleikamp brelse(bh); 422470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 422570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4226a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 4227ac27a0ecSDave Kleikamp if (!bh) { 4228b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4229b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 4230ac27a0ecSDave Kleikamp goto failed_mount; 4231ac27a0ecSDave Kleikamp } 42322716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4233ac27a0ecSDave Kleikamp sbi->s_es = es; 4234617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4235b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4236b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4237ac27a0ecSDave Kleikamp goto failed_mount; 4238ac27a0ecSDave Kleikamp } 4239ac27a0ecSDave Kleikamp } 4240ac27a0ecSDave Kleikamp 4241e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4242f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4243f287a1a5STheodore Ts'o has_huge_files); 4244f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4245ac27a0ecSDave Kleikamp 42460d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4247e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 42488fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 42490d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4250d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4251b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4252b31e1552SEric Sandeen "unsupported descriptor size %lu", 42530d1ee42fSAlexandre Ratchov sbi->s_desc_size); 42540d1ee42fSAlexandre Ratchov goto failed_mount; 42550d1ee42fSAlexandre Ratchov } 42560d1ee42fSAlexandre Ratchov } else 42570d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 42580b8e58a1SAndreas Dilger 4259ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4260ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 42610b8e58a1SAndreas Dilger 4262617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4263ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4264617ba13bSMingming Cao goto cantfind_ext4; 4265cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4266cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4267cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4268b9c538daSJosh Triplett sbi->s_inodes_per_group); 4269cd6bb35bSTheodore Ts'o goto failed_mount; 4270cd6bb35bSTheodore Ts'o } 4271ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4272ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 42730d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4274ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4275ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4276e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4277e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 42780b8e58a1SAndreas Dilger 4279ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4280ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4281ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4282e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4283f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4284f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4285f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4286f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4287f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4288bc98a42cSDavid Howells if (!sb_rdonly(sb)) 428923301410STheodore Ts'o es->s_flags |= 429023301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4291f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4292f99b2589STheodore Ts'o #else 4293bc98a42cSDavid Howells if (!sb_rdonly(sb)) 429423301410STheodore Ts'o es->s_flags |= 429523301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4296f99b2589STheodore Ts'o #endif 4297f99b2589STheodore Ts'o } 429823301410STheodore Ts'o } 4299ac27a0ecSDave Kleikamp 4300281b5995STheodore Ts'o /* Handle clustersize */ 4301281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4302ef5fd681SKaixu Xia if (ext4_has_feature_bigalloc(sb)) { 4303281b5995STheodore Ts'o if (clustersize < blocksize) { 4304281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4305281b5995STheodore Ts'o "cluster size (%d) smaller than " 4306281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4307281b5995STheodore Ts'o goto failed_mount; 4308281b5995STheodore Ts'o } 4309281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4310281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4311281b5995STheodore Ts'o sbi->s_clusters_per_group = 4312281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4313281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4314281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4315281b5995STheodore Ts'o "#clusters per group too big: %lu", 4316281b5995STheodore Ts'o sbi->s_clusters_per_group); 4317281b5995STheodore Ts'o goto failed_mount; 4318281b5995STheodore Ts'o } 4319281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4320281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4321281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4322281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4323281b5995STheodore Ts'o sbi->s_blocks_per_group, 4324281b5995STheodore Ts'o sbi->s_clusters_per_group); 4325281b5995STheodore Ts'o goto failed_mount; 4326281b5995STheodore Ts'o } 4327281b5995STheodore Ts'o } else { 4328281b5995STheodore Ts'o if (clustersize != blocksize) { 4329bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4330bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4331bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4332bfe0a5f4STheodore Ts'o goto failed_mount; 4333281b5995STheodore Ts'o } 4334ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4335b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4336b31e1552SEric Sandeen "#blocks per group too big: %lu", 4337ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4338ac27a0ecSDave Kleikamp goto failed_mount; 4339ac27a0ecSDave Kleikamp } 4340281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4341281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4342281b5995STheodore Ts'o } 4343281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4344281b5995STheodore Ts'o 4345960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4346960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4347960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4348960fd856STheodore Ts'o 4349bf43d84bSEric Sandeen /* 4350bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4351bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4352bf43d84bSEric Sandeen */ 43535a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 435430ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 43555a9ae68aSDarrick J. Wong if (err) { 4356b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4357bf43d84bSEric Sandeen " too large to mount safely on this system"); 4358ac27a0ecSDave Kleikamp goto failed_mount; 4359ac27a0ecSDave Kleikamp } 4360ac27a0ecSDave Kleikamp 4361617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4362617ba13bSMingming Cao goto cantfind_ext4; 4363e7c95593SEric Sandeen 43640f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 43650f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 43660f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4367b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4368b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 43690f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 43700f2ddca6SFrom: Thiemo Nagel goto failed_mount; 43710f2ddca6SFrom: Thiemo Nagel } 43720f2ddca6SFrom: Thiemo Nagel 43734ec11028STheodore Ts'o /* 43744ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 43754ec11028STheodore Ts'o * of the filesystem. 43764ec11028STheodore Ts'o */ 43774ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4378b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4379b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4380e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 43814ec11028STheodore Ts'o ext4_blocks_count(es)); 4382e7c95593SEric Sandeen goto failed_mount; 4383e7c95593SEric Sandeen } 4384bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4385bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4386bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4387bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4388bfe0a5f4STheodore Ts'o goto failed_mount; 4389bfe0a5f4STheodore Ts'o } 4390bfe0a5f4STheodore Ts'o 4391bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4392bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4393bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4394bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 43954ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4396df41460aSJosh Triplett ext4_msg(sb, KERN_WARNING, "groups count too large: %llu " 43974ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4398df41460aSJosh Triplett "blocks per group %lu)", blocks_count, 43994ec11028STheodore Ts'o ext4_blocks_count(es), 44004ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 44014ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 44024ec11028STheodore Ts'o goto failed_mount; 44034ec11028STheodore Ts'o } 4404bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4405fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4406fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 44079e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 44089e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 44099e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 44109e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 44119e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 44129e463084STheodore Ts'o ret = -EINVAL; 44139e463084STheodore Ts'o goto failed_mount; 44149e463084STheodore Ts'o } 4415617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4416617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 44173a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 44182ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 44193a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 44203a4b77cdSEryu Guan "first meta block group too large: %u " 44213a4b77cdSEryu Guan "(group descriptor block count %u)", 44223a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 44233a4b77cdSEryu Guan goto failed_mount; 44243a4b77cdSEryu Guan } 44253a4b77cdSEryu Guan } 44261d0c3924STheodore Ts'o rcu_assign_pointer(sbi->s_group_desc, 44271d0c3924STheodore Ts'o kvmalloc_array(db_count, 4428f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 44291d0c3924STheodore Ts'o GFP_KERNEL)); 4430ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4431b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 44322cde417dSTheodore Ts'o ret = -ENOMEM; 4433ac27a0ecSDave Kleikamp goto failed_mount; 4434ac27a0ecSDave Kleikamp } 4435ac27a0ecSDave Kleikamp 4436705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4437ac27a0ecSDave Kleikamp 443885c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 443985c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 444085c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 4441d87f6392SRoman Gushchin sb_breadahead_unmovable(sb, block); 444285c8f176SAndrew Perepechko } 444385c8f176SAndrew Perepechko 4444ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 44451d0c3924STheodore Ts'o struct buffer_head *bh; 44461d0c3924STheodore Ts'o 444770bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 44481d0c3924STheodore Ts'o bh = sb_bread_unmovable(sb, block); 44491d0c3924STheodore Ts'o if (!bh) { 4450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4451b31e1552SEric Sandeen "can't read group descriptor %d", i); 4452ac27a0ecSDave Kleikamp db_count = i; 4453ac27a0ecSDave Kleikamp goto failed_mount2; 4454ac27a0ecSDave Kleikamp } 44551d0c3924STheodore Ts'o rcu_read_lock(); 44561d0c3924STheodore Ts'o rcu_dereference(sbi->s_group_desc)[i] = bh; 44571d0c3924STheodore Ts'o rcu_read_unlock(); 4458ac27a0ecSDave Kleikamp } 445944de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4460829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4461b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 44626a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4463f9ae9cf5STheodore Ts'o goto failed_mount2; 4464ac27a0ecSDave Kleikamp } 4465772cb7c8SJose R. Santos 4466235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 446704496411STao Ma 4468a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4469eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4470ce7e010aSTheodore Ts'o goto failed_mount3; 4471ce7e010aSTheodore Ts'o 4472c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 447367a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4474c9de560dSAlex Tomas 4475f9ae9cf5STheodore Ts'o /* 4476f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4477f9ae9cf5STheodore Ts'o */ 4478f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4479617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4480617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4481643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 4482a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4483ffcc4182SEric Biggers #endif 4484c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 4485c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 4486c93d8f88SEric Biggers #endif 4487ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4488617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4489e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 44901fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4491262b4662SJan Kara else 4492262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4493689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4494ac27a0ecSDave Kleikamp #endif 449585787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4496f2fa2ffcSAneesh Kumar K.V 4497ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 44983b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4499ac27a0ecSDave Kleikamp 4500ac27a0ecSDave Kleikamp sb->s_root = NULL; 4501ac27a0ecSDave Kleikamp 4502ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4503e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4504ac27a0ecSDave Kleikamp 4505bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4506c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 450750460fe8SDarrick J. Wong goto failed_mount3a; 4508c5e06d10SJohann Lombardi 4509ac27a0ecSDave Kleikamp /* 4510ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4511ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4512ac27a0ecSDave Kleikamp */ 4513e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 45144753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 45154753d8a2STheodore Ts'o if (err) 451650460fe8SDarrick J. Wong goto failed_mount3a; 4517bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4518e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4519b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4520b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4521744692dcSJiaying Zhang goto failed_mount_wq; 4522ac27a0ecSDave Kleikamp } else { 45231e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 45241e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 45251e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 45261e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 45271e381f60SDmitry Monakhov goto failed_mount_wq; 45281e381f60SDmitry Monakhov } 45291e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 45301e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 45311e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 45321e381f60SDmitry Monakhov goto failed_mount_wq; 45331e381f60SDmitry Monakhov } 45341e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 45351e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 45361e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 45371e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 45381e381f60SDmitry Monakhov goto failed_mount_wq; 45391e381f60SDmitry Monakhov } 45401e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 45411e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 45421e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 45431e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 45441e381f60SDmitry Monakhov goto failed_mount_wq; 45451e381f60SDmitry Monakhov } 454650b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 45471e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4548fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 45490390131bSFrank Mayhar sbi->s_journal = NULL; 45500390131bSFrank Mayhar needs_recovery = 0; 45510390131bSFrank Mayhar goto no_journal; 4552ac27a0ecSDave Kleikamp } 4553ac27a0ecSDave Kleikamp 4554e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4555eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4556eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4557b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4558744692dcSJiaying Zhang goto failed_mount_wq; 4559eb40a09cSJose R. Santos } 4560eb40a09cSJose R. Santos 456125ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 456225ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 456325ed6e8aSDarrick J. Wong "feature set"); 456425ed6e8aSDarrick J. Wong goto failed_mount_wq; 4565d4da6c9cSLinus Torvalds } 4566818d276cSGirish Shilamkar 4567ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4568ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4569ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4570ac27a0ecSDave Kleikamp case 0: 4571ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 457263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 457363f57933SAndrew Morton * cope, else JOURNAL_DATA 457463f57933SAndrew Morton */ 4575dab291afSMingming Cao if (jbd2_journal_check_available_features 457627f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4577fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 457827f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 457927f394a7STyson Nottingham } else { 4580fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 458127f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 458227f394a7STyson Nottingham } 4583ac27a0ecSDave Kleikamp break; 4584ac27a0ecSDave Kleikamp 4585617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4586617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4587dab291afSMingming Cao if (!jbd2_journal_check_available_features 4588dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4589b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4590b31e1552SEric Sandeen "requested data journaling mode"); 4591744692dcSJiaying Zhang goto failed_mount_wq; 4592ac27a0ecSDave Kleikamp } 4593ac27a0ecSDave Kleikamp default: 4594ac27a0ecSDave Kleikamp break; 4595ac27a0ecSDave Kleikamp } 4596ab04df78SJan Kara 4597ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4598ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4599ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4600ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4601ab04df78SJan Kara goto failed_mount_wq; 4602ab04df78SJan Kara } 4603ab04df78SJan Kara 4604b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4605ac27a0ecSDave Kleikamp 460618aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 460718aadd47SBobi Jam 4608ce7e010aSTheodore Ts'o no_journal: 4609cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 461047387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 461147387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4612cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4613cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 46149c191f70ST Makphaibulchoke goto failed_mount_wq; 46159c191f70ST Makphaibulchoke } 46169c191f70ST Makphaibulchoke 4617dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4618dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4619dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4620dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4621dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4622dec214d0STahsin Erdogan goto failed_mount_wq; 4623dec214d0STahsin Erdogan } 4624dec214d0STahsin Erdogan } 4625cdb7ee4cSTahsin Erdogan } 4626dec214d0STahsin Erdogan 4627c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 4628c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 4629c93d8f88SEric Biggers goto failed_mount_wq; 4630c93d8f88SEric Biggers } 4631c93d8f88SEric Biggers 4632bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4633e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4634e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 46356ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 46366ddb2447STheodore Ts'o } 46376ddb2447STheodore Ts'o 4638fd89d5f2STejun Heo /* 4639952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4640952fc18eSTheodore Ts'o * superblock if present. 4641952fc18eSTheodore Ts'o */ 4642952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4643952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4644952fc18eSTheodore Ts'o else { 464507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 464607aa2ea1SLukas Czerner if (err) 4647952fc18eSTheodore Ts'o goto failed_mount_wq; 4648952fc18eSTheodore Ts'o } 4649952fc18eSTheodore Ts'o 4650952fc18eSTheodore Ts'o /* 4651fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4652fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4653fd89d5f2STejun Heo */ 46542e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 46552e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 46562e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 46572e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 465807aa2ea1SLukas Czerner ret = -ENOMEM; 46592e8fa54eSJan Kara goto failed_mount4; 46602e8fa54eSJan Kara } 46612e8fa54eSJan Kara 4662ac27a0ecSDave Kleikamp /* 4663dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4664ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4665ac27a0ecSDave Kleikamp */ 4666ac27a0ecSDave Kleikamp 46678a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 46681d1fe1eeSDavid Howells if (IS_ERR(root)) { 4669b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 46701d1fe1eeSDavid Howells ret = PTR_ERR(root); 467132a9bb57SManish Katiyar root = NULL; 4672ac27a0ecSDave Kleikamp goto failed_mount4; 4673ac27a0ecSDave Kleikamp } 4674ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4675b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 467694bf608aSAl Viro iput(root); 4677ac27a0ecSDave Kleikamp goto failed_mount4; 4678ac27a0ecSDave Kleikamp } 4679b886ee3eSGabriel Krisman Bertazi 4680b886ee3eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4681b886ee3eSGabriel Krisman Bertazi if (sbi->s_encoding) 4682b886ee3eSGabriel Krisman Bertazi sb->s_d_op = &ext4_dentry_ops; 4683b886ee3eSGabriel Krisman Bertazi #endif 4684b886ee3eSGabriel Krisman Bertazi 468548fde701SAl Viro sb->s_root = d_make_root(root); 46861d1fe1eeSDavid Howells if (!sb->s_root) { 4687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 46881d1fe1eeSDavid Howells ret = -ENOMEM; 46891d1fe1eeSDavid Howells goto failed_mount4; 46901d1fe1eeSDavid Howells } 4691ac27a0ecSDave Kleikamp 4692c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 4693c89128a0SJaegeuk Kim if (ret == -EROFS) { 46941751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4695c89128a0SJaegeuk Kim ret = 0; 4696c89128a0SJaegeuk Kim } else if (ret) 4697c89128a0SJaegeuk Kim goto failed_mount4a; 4698ef7f3835SKalpak Shah 4699b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 470027dd4385SLukas Czerner 47016fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 47026fd058f7STheodore Ts'o if (err) { 4703b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4704fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4705f9ae9cf5STheodore Ts'o goto failed_mount4a; 4706f9ae9cf5STheodore Ts'o } 4707f9ae9cf5STheodore Ts'o 4708f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4709f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4710f9ae9cf5STheodore Ts'o if (err) { 4711f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4712f9ae9cf5STheodore Ts'o err); 4713dcf2d804STao Ma goto failed_mount5; 4714c2774d84SAneesh Kumar K.V } 4715c2774d84SAneesh Kumar K.V 4716d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4717d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4718d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 47194274f516STheodore Ts'o ext4_superblock_csum_set(sb); 4720908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4721908c7f19STejun Heo GFP_KERNEL); 4722d5e03cbbSTheodore Ts'o if (!err) { 4723d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4724d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 47254274f516STheodore Ts'o ext4_superblock_csum_set(sb); 4726908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4727908c7f19STejun Heo GFP_KERNEL); 4728d5e03cbbSTheodore Ts'o } 4729d5e03cbbSTheodore Ts'o if (!err) 4730d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4731908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4732d5e03cbbSTheodore Ts'o if (!err) 4733908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4734908c7f19STejun Heo GFP_KERNEL); 4735c8585c6fSDaeho Jeong if (!err) 4736bbd55937SEric Biggers err = percpu_init_rwsem(&sbi->s_writepages_rwsem); 4737c8585c6fSDaeho Jeong 4738d5e03cbbSTheodore Ts'o if (err) { 4739d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4740d5e03cbbSTheodore Ts'o goto failed_mount6; 4741d5e03cbbSTheodore Ts'o } 4742d5e03cbbSTheodore Ts'o 4743e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4744d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4745d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4746d5e03cbbSTheodore Ts'o "unable to initialize " 4747d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4748d5e03cbbSTheodore Ts'o goto failed_mount6; 4749d5e03cbbSTheodore Ts'o } 4750d5e03cbbSTheodore Ts'o 4751bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4752bfff6873SLukas Czerner if (err) 4753dcf2d804STao Ma goto failed_mount6; 4754bfff6873SLukas Czerner 4755b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4756dcf2d804STao Ma if (err) 4757dcf2d804STao Ma goto failed_mount7; 47583197ebdbSTheodore Ts'o 47599b2ff357SJan Kara #ifdef CONFIG_QUOTA 47609b2ff357SJan Kara /* Enable quota usage during mount. */ 4761bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 47629b2ff357SJan Kara err = ext4_enable_quotas(sb); 47639b2ff357SJan Kara if (err) 47649b2ff357SJan Kara goto failed_mount8; 47659b2ff357SJan Kara } 47669b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 47679b2ff357SJan Kara 4768*bc71726cSzhangyi (F) /* 4769*bc71726cSzhangyi (F) * Save the original bdev mapping's wb_err value which could be 4770*bc71726cSzhangyi (F) * used to detect the metadata async write error. 4771*bc71726cSzhangyi (F) */ 4772*bc71726cSzhangyi (F) spin_lock_init(&sbi->s_bdev_wb_lock); 4773*bc71726cSzhangyi (F) if (!sb_rdonly(sb)) 4774*bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 4775*bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 4776*bc71726cSzhangyi (F) sb->s_bdev->bd_super = sb; 4777617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4778617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4779617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 47800390131bSFrank Mayhar if (needs_recovery) { 4781b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 478211215630SJan Kara err = ext4_mark_recovery_complete(sb, es); 478311215630SJan Kara if (err) 478411215630SJan Kara goto failed_mount8; 47850390131bSFrank Mayhar } 47860390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 47870390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 47880390131bSFrank Mayhar descr = " journalled data mode"; 47890390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 47900390131bSFrank Mayhar descr = " ordered data mode"; 47910390131bSFrank Mayhar else 47920390131bSFrank Mayhar descr = " writeback data mode"; 47930390131bSFrank Mayhar } else 47940390131bSFrank Mayhar descr = "out journal"; 47950390131bSFrank Mayhar 479679add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 479779add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 479879add3a3SLukas Czerner if (!blk_queue_discard(q)) 479979add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 480079add3a3SLukas Czerner "mounting with \"discard\" option, but " 480179add3a3SLukas Czerner "the device does not support discard"); 480279add3a3SLukas Czerner } 480379add3a3SLukas Czerner 4804e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4805d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 48065aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 48075aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 48085aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 48098b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4810ac27a0ecSDave Kleikamp 481166e61a9eSTheodore Ts'o if (es->s_error_count) 481266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4813ac27a0ecSDave Kleikamp 4814efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4815efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4816efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4817efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4818efbed4dcSTheodore Ts'o 4819d4c402d9SCurt Wohlgemuth kfree(orig_data); 4820ac27a0ecSDave Kleikamp return 0; 4821ac27a0ecSDave Kleikamp 4822617ba13bSMingming Cao cantfind_ext4: 4823ac27a0ecSDave Kleikamp if (!silent) 4824b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4825ac27a0ecSDave Kleikamp goto failed_mount; 4826ac27a0ecSDave Kleikamp 482772ba7450STheodore Ts'o failed_mount8: 4828ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 4829dcf2d804STao Ma failed_mount7: 4830dcf2d804STao Ma ext4_unregister_li_request(sb); 4831dcf2d804STao Ma failed_mount6: 4832f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 48337c990728SSuraj Jitindar Singh rcu_read_lock(); 48347c990728SSuraj Jitindar Singh flex_groups = rcu_dereference(sbi->s_flex_groups); 48357c990728SSuraj Jitindar Singh if (flex_groups) { 48367c990728SSuraj Jitindar Singh for (i = 0; i < sbi->s_flex_groups_allocated; i++) 48377c990728SSuraj Jitindar Singh kvfree(flex_groups[i]); 48387c990728SSuraj Jitindar Singh kvfree(flex_groups); 48397c990728SSuraj Jitindar Singh } 48407c990728SSuraj Jitindar Singh rcu_read_unlock(); 4841d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4842d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4843d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4844d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 4845bbd55937SEric Biggers percpu_free_rwsem(&sbi->s_writepages_rwsem); 484600764937SAzat Khuzhin failed_mount5: 4847f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4848f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4849f9ae9cf5STheodore Ts'o failed_mount4a: 485094bf608aSAl Viro dput(sb->s_root); 485132a9bb57SManish Katiyar sb->s_root = NULL; 485294bf608aSAl Viro failed_mount4: 4853b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 48542e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 48552e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 48564c0425ffSMingming Cao failed_mount_wq: 4857dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 4858dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 485950c15df6SChengguang Xu 486047387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 486147387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 486250c15df6SChengguang Xu 48630390131bSFrank Mayhar if (sbi->s_journal) { 4864dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 486547b4a50bSJan Kara sbi->s_journal = NULL; 48660390131bSFrank Mayhar } 486750460fe8SDarrick J. Wong failed_mount3a: 4868d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4869eb68d0e2SZheng Liu failed_mount3: 48709105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4871c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4872c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4873ac27a0ecSDave Kleikamp failed_mount2: 48741d0c3924STheodore Ts'o rcu_read_lock(); 48751d0c3924STheodore Ts'o group_desc = rcu_dereference(sbi->s_group_desc); 4876ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 48771d0c3924STheodore Ts'o brelse(group_desc[i]); 48781d0c3924STheodore Ts'o kvfree(group_desc); 48791d0c3924STheodore Ts'o rcu_read_unlock(); 4880ac27a0ecSDave Kleikamp failed_mount: 48810441984aSDarrick J. Wong if (sbi->s_chksum_driver) 48820441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4883c83ad55eSGabriel Krisman Bertazi 4884c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4885c83ad55eSGabriel Krisman Bertazi utf8_unload(sbi->s_encoding); 4886c83ad55eSGabriel Krisman Bertazi #endif 4887c83ad55eSGabriel Krisman Bertazi 4888ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4889a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 48900ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 4891ac27a0ecSDave Kleikamp #endif 4892ed318a6cSEric Biggers fscrypt_free_dummy_context(&sbi->s_dummy_enc_ctx); 4893617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4894ac27a0ecSDave Kleikamp brelse(bh); 4895ac27a0ecSDave Kleikamp out_fail: 4896ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4897f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 48985aee0f8aSTheodore Ts'o out_free_base: 4899ac27a0ecSDave Kleikamp kfree(sbi); 4900d4c402d9SCurt Wohlgemuth kfree(orig_data); 49015e405595SDan Williams fs_put_dax(dax_dev); 490207aa2ea1SLukas Czerner return err ? err : ret; 4903ac27a0ecSDave Kleikamp } 4904ac27a0ecSDave Kleikamp 4905ac27a0ecSDave Kleikamp /* 4906ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4907ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4908ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4909ac27a0ecSDave Kleikamp */ 4910617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4911ac27a0ecSDave Kleikamp { 4912617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4913ac27a0ecSDave Kleikamp 4914ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 491530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 491630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4917ac27a0ecSDave Kleikamp 4918a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4919ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4920dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4921ac27a0ecSDave Kleikamp else 4922dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 49235bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 49245bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 49255bf5683aSHidehiro Kawai else 49265bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4927a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4928ac27a0ecSDave Kleikamp } 4929ac27a0ecSDave Kleikamp 4930c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4931ac27a0ecSDave Kleikamp unsigned int journal_inum) 4932ac27a0ecSDave Kleikamp { 4933ac27a0ecSDave Kleikamp struct inode *journal_inode; 4934ac27a0ecSDave Kleikamp 4935c6cb7e77SEric Whitney /* 4936c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4937c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4938c6cb7e77SEric Whitney * will try to delete it. 4939c6cb7e77SEric Whitney */ 49408a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 49411d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4942b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4943ac27a0ecSDave Kleikamp return NULL; 4944ac27a0ecSDave Kleikamp } 4945ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4946ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4947ac27a0ecSDave Kleikamp iput(journal_inode); 4948b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4949ac27a0ecSDave Kleikamp return NULL; 4950ac27a0ecSDave Kleikamp } 4951ac27a0ecSDave Kleikamp 4952e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4953ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 49541d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4955b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4956ac27a0ecSDave Kleikamp iput(journal_inode); 4957ac27a0ecSDave Kleikamp return NULL; 4958ac27a0ecSDave Kleikamp } 4959c6cb7e77SEric Whitney return journal_inode; 4960c6cb7e77SEric Whitney } 4961c6cb7e77SEric Whitney 4962c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4963c6cb7e77SEric Whitney unsigned int journal_inum) 4964c6cb7e77SEric Whitney { 4965c6cb7e77SEric Whitney struct inode *journal_inode; 4966c6cb7e77SEric Whitney journal_t *journal; 4967c6cb7e77SEric Whitney 496811215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 496911215630SJan Kara return NULL; 4970c6cb7e77SEric Whitney 4971c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4972c6cb7e77SEric Whitney if (!journal_inode) 4973c6cb7e77SEric Whitney return NULL; 4974ac27a0ecSDave Kleikamp 4975dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4976ac27a0ecSDave Kleikamp if (!journal) { 4977b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4978ac27a0ecSDave Kleikamp iput(journal_inode); 4979ac27a0ecSDave Kleikamp return NULL; 4980ac27a0ecSDave Kleikamp } 4981ac27a0ecSDave Kleikamp journal->j_private = sb; 4982617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4983ac27a0ecSDave Kleikamp return journal; 4984ac27a0ecSDave Kleikamp } 4985ac27a0ecSDave Kleikamp 4986617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4987ac27a0ecSDave Kleikamp dev_t j_dev) 4988ac27a0ecSDave Kleikamp { 4989ac27a0ecSDave Kleikamp struct buffer_head *bh; 4990ac27a0ecSDave Kleikamp journal_t *journal; 4991617ba13bSMingming Cao ext4_fsblk_t start; 4992617ba13bSMingming Cao ext4_fsblk_t len; 4993ac27a0ecSDave Kleikamp int hblock, blocksize; 4994617ba13bSMingming Cao ext4_fsblk_t sb_block; 4995ac27a0ecSDave Kleikamp unsigned long offset; 4996617ba13bSMingming Cao struct ext4_super_block *es; 4997ac27a0ecSDave Kleikamp struct block_device *bdev; 4998ac27a0ecSDave Kleikamp 499911215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 500011215630SJan Kara return NULL; 50010390131bSFrank Mayhar 5002b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 5003ac27a0ecSDave Kleikamp if (bdev == NULL) 5004ac27a0ecSDave Kleikamp return NULL; 5005ac27a0ecSDave Kleikamp 5006ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 5007e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 5008ac27a0ecSDave Kleikamp if (blocksize < hblock) { 5009b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5010b31e1552SEric Sandeen "blocksize too small for journal device"); 5011ac27a0ecSDave Kleikamp goto out_bdev; 5012ac27a0ecSDave Kleikamp } 5013ac27a0ecSDave Kleikamp 5014617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 5015617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 5016ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 5017ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 5018b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 5019b31e1552SEric Sandeen "external journal"); 5020ac27a0ecSDave Kleikamp goto out_bdev; 5021ac27a0ecSDave Kleikamp } 5022ac27a0ecSDave Kleikamp 50232716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 5024617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 5025ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 5026617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 5027b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 5028b31e1552SEric Sandeen "bad superblock"); 5029ac27a0ecSDave Kleikamp brelse(bh); 5030ac27a0ecSDave Kleikamp goto out_bdev; 5031ac27a0ecSDave Kleikamp } 5032ac27a0ecSDave Kleikamp 5033df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 5034df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 5035df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 5036df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 5037df4763beSDarrick J. Wong "corrupt superblock"); 5038df4763beSDarrick J. Wong brelse(bh); 5039df4763beSDarrick J. Wong goto out_bdev; 5040df4763beSDarrick J. Wong } 5041df4763beSDarrick J. Wong 5042617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 5043b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 5044ac27a0ecSDave Kleikamp brelse(bh); 5045ac27a0ecSDave Kleikamp goto out_bdev; 5046ac27a0ecSDave Kleikamp } 5047ac27a0ecSDave Kleikamp 5048bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 5049ac27a0ecSDave Kleikamp start = sb_block + 1; 5050ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 5051ac27a0ecSDave Kleikamp 5052dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 5053ac27a0ecSDave Kleikamp start, len, blocksize); 5054ac27a0ecSDave Kleikamp if (!journal) { 5055b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 5056ac27a0ecSDave Kleikamp goto out_bdev; 5057ac27a0ecSDave Kleikamp } 5058ac27a0ecSDave Kleikamp journal->j_private = sb; 5059dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 5060ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 5061ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 5062b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 5063ac27a0ecSDave Kleikamp goto out_journal; 5064ac27a0ecSDave Kleikamp } 5065ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 5066b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 5067b31e1552SEric Sandeen "user (unsupported) - %d", 5068ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 5069ac27a0ecSDave Kleikamp goto out_journal; 5070ac27a0ecSDave Kleikamp } 5071617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 5072617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 5073ac27a0ecSDave Kleikamp return journal; 50740b8e58a1SAndreas Dilger 5075ac27a0ecSDave Kleikamp out_journal: 5076dab291afSMingming Cao jbd2_journal_destroy(journal); 5077ac27a0ecSDave Kleikamp out_bdev: 5078617ba13bSMingming Cao ext4_blkdev_put(bdev); 5079ac27a0ecSDave Kleikamp return NULL; 5080ac27a0ecSDave Kleikamp } 5081ac27a0ecSDave Kleikamp 5082617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 5083617ba13bSMingming Cao struct ext4_super_block *es, 5084ac27a0ecSDave Kleikamp unsigned long journal_devnum) 5085ac27a0ecSDave Kleikamp { 5086ac27a0ecSDave Kleikamp journal_t *journal; 5087ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 5088ac27a0ecSDave Kleikamp dev_t journal_dev; 5089ac27a0ecSDave Kleikamp int err = 0; 5090ac27a0ecSDave Kleikamp int really_read_only; 5091273108faSLukas Czerner int journal_dev_ro; 5092ac27a0ecSDave Kleikamp 509311215630SJan Kara if (WARN_ON_ONCE(!ext4_has_feature_journal(sb))) 509411215630SJan Kara return -EFSCORRUPTED; 50950390131bSFrank Mayhar 5096ac27a0ecSDave Kleikamp if (journal_devnum && 5097ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5098b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 5099b31e1552SEric Sandeen "numbers have changed"); 5100ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 5101ac27a0ecSDave Kleikamp } else 5102ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 5103ac27a0ecSDave Kleikamp 5104273108faSLukas Czerner if (journal_inum && journal_dev) { 5105273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5106273108faSLukas Czerner "filesystem has both journal inode and journal device!"); 5107273108faSLukas Czerner return -EINVAL; 5108273108faSLukas Czerner } 5109273108faSLukas Czerner 5110273108faSLukas Czerner if (journal_inum) { 5111273108faSLukas Czerner journal = ext4_get_journal(sb, journal_inum); 5112273108faSLukas Czerner if (!journal) 5113273108faSLukas Czerner return -EINVAL; 5114273108faSLukas Czerner } else { 5115273108faSLukas Czerner journal = ext4_get_dev_journal(sb, journal_dev); 5116273108faSLukas Czerner if (!journal) 5117273108faSLukas Czerner return -EINVAL; 5118273108faSLukas Czerner } 5119273108faSLukas Czerner 5120273108faSLukas Czerner journal_dev_ro = bdev_read_only(journal->j_dev); 5121273108faSLukas Czerner really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro; 5122273108faSLukas Czerner 5123273108faSLukas Czerner if (journal_dev_ro && !sb_rdonly(sb)) { 5124273108faSLukas Czerner ext4_msg(sb, KERN_ERR, 5125273108faSLukas Czerner "journal device read-only, try mounting with '-o ro'"); 5126273108faSLukas Czerner err = -EROFS; 5127273108faSLukas Czerner goto err_out; 5128273108faSLukas Czerner } 5129ac27a0ecSDave Kleikamp 5130ac27a0ecSDave Kleikamp /* 5131ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 5132ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 5133ac27a0ecSDave Kleikamp * can get read-write access to the device. 5134ac27a0ecSDave Kleikamp */ 5135e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 5136bc98a42cSDavid Howells if (sb_rdonly(sb)) { 5137b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 5138b31e1552SEric Sandeen "required on readonly filesystem"); 5139ac27a0ecSDave Kleikamp if (really_read_only) { 5140b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 5141d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 5142d98bf8cdSSimon Ruderich "(try mounting with noload)"); 5143273108faSLukas Czerner err = -EROFS; 5144273108faSLukas Czerner goto err_out; 5145ac27a0ecSDave Kleikamp } 5146b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 5147b31e1552SEric Sandeen "be enabled during recovery"); 5148ac27a0ecSDave Kleikamp } 5149ac27a0ecSDave Kleikamp } 5150ac27a0ecSDave Kleikamp 515190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 5152b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 51534776004fSTheodore Ts'o 5154e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 5155dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 51561c13d5c0STheodore Ts'o if (!err) { 51571c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 51581c13d5c0STheodore Ts'o if (save) 51591c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 51601c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 5161dab291afSMingming Cao err = jbd2_journal_load(journal); 51621c13d5c0STheodore Ts'o if (save) 51631c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 51641c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 51651c13d5c0STheodore Ts'o kfree(save); 51661c13d5c0STheodore Ts'o } 5167ac27a0ecSDave Kleikamp 5168ac27a0ecSDave Kleikamp if (err) { 5169b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 5170273108faSLukas Czerner goto err_out; 5171ac27a0ecSDave Kleikamp } 5172ac27a0ecSDave Kleikamp 5173617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 517411215630SJan Kara err = ext4_clear_journal_err(sb, es); 517511215630SJan Kara if (err) { 517611215630SJan Kara EXT4_SB(sb)->s_journal = NULL; 517711215630SJan Kara jbd2_journal_destroy(journal); 517811215630SJan Kara return err; 517911215630SJan Kara } 5180ac27a0ecSDave Kleikamp 5181c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 5182ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 5183ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 5184ac27a0ecSDave Kleikamp 5185ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 5186e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5187ac27a0ecSDave Kleikamp } 5188ac27a0ecSDave Kleikamp 5189ac27a0ecSDave Kleikamp return 0; 5190273108faSLukas Czerner 5191273108faSLukas Czerner err_out: 5192273108faSLukas Czerner jbd2_journal_destroy(journal); 5193273108faSLukas Czerner return err; 5194ac27a0ecSDave Kleikamp } 5195ac27a0ecSDave Kleikamp 5196e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 5197ac27a0ecSDave Kleikamp { 5198e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 5199617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 5200c4be0c1dSTakashi Sato int error = 0; 5201ac27a0ecSDave Kleikamp 5202bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 5203c4be0c1dSTakashi Sato return error; 5204a17712c8SJon Derrick 5205a17712c8SJon Derrick /* 5206a17712c8SJon Derrick * The superblock bh should be mapped, but it might not be if the 5207a17712c8SJon Derrick * device was hot-removed. Not much we can do but fail the I/O. 5208a17712c8SJon Derrick */ 5209a17712c8SJon Derrick if (!buffer_mapped(sbh)) 5210a17712c8SJon Derrick return error; 5211a17712c8SJon Derrick 521271290b36STheodore Ts'o /* 521371290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 521471290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 521571290b36STheodore Ts'o * write time when we are mounting the root file system 521671290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 521771290b36STheodore Ts'o * for people who are east of GMT and who make their clock 521871290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 521971290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 522071290b36STheodore Ts'o * to complain and force a full file system check. 522171290b36STheodore Ts'o */ 52221751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 52236a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5224f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 5225afc32f7eSTheodore Ts'o es->s_kbytes_written = 5226afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 5227dbae2c55SMichael Callahan ((part_stat_read(sb->s_bdev->bd_part, 5228dbae2c55SMichael Callahan sectors[STAT_WRITE]) - 5229afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 5230f613dfcbSTheodore Ts'o else 5231f613dfcbSTheodore Ts'o es->s_kbytes_written = 5232f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 5233d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 523457042651STheodore Ts'o ext4_free_blocks_count_set(es, 523557042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 523657042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 5237d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 52387f93cff9STheodore Ts'o es->s_free_inodes_count = 52397f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 52405d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 5241ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 524206db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 52431566a48aSTheodore Ts'o if (sync) 52444743f839SPranay Kr. Srivastava lock_buffer(sbh); 5245e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 52464743f839SPranay Kr. Srivastava /* 52474743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 52484743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 52494743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 52504743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 52514743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 52524743f839SPranay Kr. Srivastava * write and hope for the best. 52534743f839SPranay Kr. Srivastava */ 52544743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 52554743f839SPranay Kr. Srivastava "superblock detected"); 52564743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 52574743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 52584743f839SPranay Kr. Srivastava } 5259ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 5260914258bfSTheodore Ts'o if (sync) { 52611566a48aSTheodore Ts'o unlock_buffer(sbh); 5262564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 526300473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 5264c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5265b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5266b31e1552SEric Sandeen "superblock"); 5267914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5268914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 5269914258bfSTheodore Ts'o } 5270914258bfSTheodore Ts'o } 5271c4be0c1dSTakashi Sato return error; 5272ac27a0ecSDave Kleikamp } 5273ac27a0ecSDave Kleikamp 5274ac27a0ecSDave Kleikamp /* 5275ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5276ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5277ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5278ac27a0ecSDave Kleikamp */ 527911215630SJan Kara static int ext4_mark_recovery_complete(struct super_block *sb, 5280617ba13bSMingming Cao struct ext4_super_block *es) 5281ac27a0ecSDave Kleikamp { 528211215630SJan Kara int err; 5283617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5284ac27a0ecSDave Kleikamp 5285e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 528611215630SJan Kara if (journal != NULL) { 528711215630SJan Kara ext4_error(sb, "Journal got removed while the fs was " 528811215630SJan Kara "mounted!"); 528911215630SJan Kara return -EFSCORRUPTED; 529011215630SJan Kara } 529111215630SJan Kara return 0; 52920390131bSFrank Mayhar } 5293dab291afSMingming Cao jbd2_journal_lock_updates(journal); 529411215630SJan Kara err = jbd2_journal_flush(journal); 529511215630SJan Kara if (err < 0) 52967ffe1ea8SHidehiro Kawai goto out; 52977ffe1ea8SHidehiro Kawai 5298bc98a42cSDavid Howells if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { 5299e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 5300e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5301ac27a0ecSDave Kleikamp } 53027ffe1ea8SHidehiro Kawai out: 5303dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 530411215630SJan Kara return err; 5305ac27a0ecSDave Kleikamp } 5306ac27a0ecSDave Kleikamp 5307ac27a0ecSDave Kleikamp /* 5308ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 5309ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 5310ac27a0ecSDave Kleikamp * main filesystem now. 5311ac27a0ecSDave Kleikamp */ 531211215630SJan Kara static int ext4_clear_journal_err(struct super_block *sb, 5313617ba13bSMingming Cao struct ext4_super_block *es) 5314ac27a0ecSDave Kleikamp { 5315ac27a0ecSDave Kleikamp journal_t *journal; 5316ac27a0ecSDave Kleikamp int j_errno; 5317ac27a0ecSDave Kleikamp const char *errstr; 5318ac27a0ecSDave Kleikamp 531911215630SJan Kara if (!ext4_has_feature_journal(sb)) { 532011215630SJan Kara ext4_error(sb, "Journal got removed while the fs was mounted!"); 532111215630SJan Kara return -EFSCORRUPTED; 532211215630SJan Kara } 53230390131bSFrank Mayhar 5324617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5325ac27a0ecSDave Kleikamp 5326ac27a0ecSDave Kleikamp /* 5327ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 5328617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 5329ac27a0ecSDave Kleikamp */ 5330ac27a0ecSDave Kleikamp 5331dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 5332ac27a0ecSDave Kleikamp if (j_errno) { 5333ac27a0ecSDave Kleikamp char nbuf[16]; 5334ac27a0ecSDave Kleikamp 5335617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 533612062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 5337ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 533812062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 5339ac27a0ecSDave Kleikamp 5340617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5341617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5342e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5343ac27a0ecSDave Kleikamp 5344dab291afSMingming Cao jbd2_journal_clear_err(journal); 5345d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 5346ac27a0ecSDave Kleikamp } 534711215630SJan Kara return 0; 5348ac27a0ecSDave Kleikamp } 5349ac27a0ecSDave Kleikamp 5350ac27a0ecSDave Kleikamp /* 5351ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 5352ac27a0ecSDave Kleikamp * and wait on the commit. 5353ac27a0ecSDave Kleikamp */ 5354617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 5355ac27a0ecSDave Kleikamp { 5356ac27a0ecSDave Kleikamp journal_t *journal; 5357ac27a0ecSDave Kleikamp 5358bc98a42cSDavid Howells if (sb_rdonly(sb)) 5359ac27a0ecSDave Kleikamp return 0; 5360ac27a0ecSDave Kleikamp 5361617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5362b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 5363ac27a0ecSDave Kleikamp } 5364ac27a0ecSDave Kleikamp 5365617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 5366ac27a0ecSDave Kleikamp { 536714ce0cb4STheodore Ts'o int ret = 0; 53689eddacf9SJan Kara tid_t target; 536906a407f1SDmitry Monakhov bool needs_barrier = false; 53708d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5371ac27a0ecSDave Kleikamp 537249598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 53730db1ff22STheodore Ts'o return 0; 53740db1ff22STheodore Ts'o 53759bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 53762e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 5377a1177825SJan Kara /* 5378a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 5379a1177825SJan Kara * no dirty dquots 5380a1177825SJan Kara */ 5381a1177825SJan Kara dquot_writeback_dquots(sb, -1); 538206a407f1SDmitry Monakhov /* 538306a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 538406a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 538506a407f1SDmitry Monakhov * transaction_commit will do it for us. 538606a407f1SDmitry Monakhov */ 5387bda32530STheodore Ts'o if (sbi->s_journal) { 538806a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 538906a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 539006a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 539106a407f1SDmitry Monakhov needs_barrier = true; 539206a407f1SDmitry Monakhov 53938d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 5394ac27a0ecSDave Kleikamp if (wait) 5395bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 5396bda32530STheodore Ts'o target); 53970390131bSFrank Mayhar } 5398bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 5399bda32530STheodore Ts'o needs_barrier = true; 540006a407f1SDmitry Monakhov if (needs_barrier) { 540106a407f1SDmitry Monakhov int err; 54029398554fSChristoph Hellwig err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL); 540306a407f1SDmitry Monakhov if (!ret) 540406a407f1SDmitry Monakhov ret = err; 540506a407f1SDmitry Monakhov } 540606a407f1SDmitry Monakhov 540706a407f1SDmitry Monakhov return ret; 540806a407f1SDmitry Monakhov } 540906a407f1SDmitry Monakhov 5410ac27a0ecSDave Kleikamp /* 5411ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5412ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5413be4f27d3SYongqiang Yang * 5414be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 54158e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 54168e8ad8a5SJan Kara * modifications. 5417ac27a0ecSDave Kleikamp */ 5418c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5419ac27a0ecSDave Kleikamp { 5420c4be0c1dSTakashi Sato int error = 0; 5421c4be0c1dSTakashi Sato journal_t *journal; 5422ac27a0ecSDave Kleikamp 5423bc98a42cSDavid Howells if (sb_rdonly(sb)) 54249ca92389STheodore Ts'o return 0; 54259ca92389STheodore Ts'o 5426c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5427ac27a0ecSDave Kleikamp 5428bb044576STheodore Ts'o if (journal) { 5429ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5430dab291afSMingming Cao jbd2_journal_lock_updates(journal); 54317ffe1ea8SHidehiro Kawai 54327ffe1ea8SHidehiro Kawai /* 5433bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5434bb044576STheodore Ts'o * flush the journal. 54357ffe1ea8SHidehiro Kawai */ 5436c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 54376b0310fbSEric Sandeen if (error < 0) 54386b0310fbSEric Sandeen goto out; 5439ac27a0ecSDave Kleikamp 5440ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5441e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 5442c642dc9eSEric Sandeen } 5443c642dc9eSEric Sandeen 5444e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 54456b0310fbSEric Sandeen out: 5446bb044576STheodore Ts'o if (journal) 54478e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5448bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 54496b0310fbSEric Sandeen return error; 5450ac27a0ecSDave Kleikamp } 5451ac27a0ecSDave Kleikamp 5452ac27a0ecSDave Kleikamp /* 5453ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5454ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5455ac27a0ecSDave Kleikamp */ 5456c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5457ac27a0ecSDave Kleikamp { 5458bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 54599ca92389STheodore Ts'o return 0; 54609ca92389STheodore Ts'o 5461c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 54629ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5463e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 5464c642dc9eSEric Sandeen } 5465c642dc9eSEric Sandeen 5466e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5467c4be0c1dSTakashi Sato return 0; 5468ac27a0ecSDave Kleikamp } 5469ac27a0ecSDave Kleikamp 5470673c6100STheodore Ts'o /* 5471673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5472673c6100STheodore Ts'o */ 5473673c6100STheodore Ts'o struct ext4_mount_options { 5474673c6100STheodore Ts'o unsigned long s_mount_opt; 5475a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 547608cefc7aSEric W. Biederman kuid_t s_resuid; 547708cefc7aSEric W. Biederman kgid_t s_resgid; 5478673c6100STheodore Ts'o unsigned long s_commit_interval; 5479673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5480673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5481673c6100STheodore Ts'o int s_jquota_fmt; 5482a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5483673c6100STheodore Ts'o #endif 5484673c6100STheodore Ts'o }; 5485673c6100STheodore Ts'o 5486617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5487ac27a0ecSDave Kleikamp { 5488617ba13bSMingming Cao struct ext4_super_block *es; 5489617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5490ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 5491617ba13bSMingming Cao struct ext4_mount_options old_opts; 5492c79d967dSChristoph Hellwig int enable_quota = 0; 54938a266467STheodore Ts'o ext4_group_t g; 5494b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5495c5e06d10SJohann Lombardi int err = 0; 5496ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 549703dafb5fSChen Gang int i, j; 549833458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 5499ac27a0ecSDave Kleikamp #endif 5500d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5501ac27a0ecSDave Kleikamp 550221ac738eSChengguang Xu if (data && !orig_data) 550321ac738eSChengguang Xu return -ENOMEM; 550421ac738eSChengguang Xu 5505ac27a0ecSDave Kleikamp /* Store the original options */ 5506ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5507ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5508a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5509ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5510ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5511ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 551230773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 551330773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5514ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5515ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5516a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 551703dafb5fSChen Gang if (sbi->s_qf_names[i]) { 551833458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 551933458eabSTheodore Ts'o 552033458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 552103dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 552203dafb5fSChen Gang for (j = 0; j < i; j++) 552303dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 55243e36a163SWei Yongjun kfree(orig_data); 552503dafb5fSChen Gang return -ENOMEM; 552603dafb5fSChen Gang } 552703dafb5fSChen Gang } else 552803dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5529ac27a0ecSDave Kleikamp #endif 5530b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5531b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 5532ac27a0ecSDave Kleikamp 5533661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 5534ac27a0ecSDave Kleikamp err = -EINVAL; 5535ac27a0ecSDave Kleikamp goto restore_opts; 5536ac27a0ecSDave Kleikamp } 5537ac27a0ecSDave Kleikamp 55386b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 55396b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 55406b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 55412d5b86e0SEric Sandeen "during remount not supported; ignoring"); 55422d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5543c6d3d56dSDarrick J. Wong } 5544c6d3d56dSDarrick J. Wong 55456ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 55466ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 55476ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 55486ae6514bSPiotr Sarna "both data=journal and delalloc"); 55496ae6514bSPiotr Sarna err = -EINVAL; 55506ae6514bSPiotr Sarna goto restore_opts; 55516ae6514bSPiotr Sarna } 55526ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 55536ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 55546ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 55556ae6514bSPiotr Sarna err = -EINVAL; 55566ae6514bSPiotr Sarna goto restore_opts; 55576ae6514bSPiotr Sarna } 5558ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5559ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5560ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5561ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5562ab04df78SJan Kara err = -EINVAL; 5563ab04df78SJan Kara goto restore_opts; 5564ab04df78SJan Kara } 5565923ae0ffSRoss Zwisler } 5566923ae0ffSRoss Zwisler 5567cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5568cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5569cdb7ee4cSTahsin Erdogan err = -EINVAL; 5570cdb7ee4cSTahsin Erdogan goto restore_opts; 5571cdb7ee4cSTahsin Erdogan } 5572cdb7ee4cSTahsin Erdogan 55734ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 557454d3adbcSTheodore Ts'o ext4_abort(sb, EXT4_ERR_ESHUTDOWN, "Abort forced by user"); 5575ac27a0ecSDave Kleikamp 55761751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 55771751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5578ac27a0ecSDave Kleikamp 5579ac27a0ecSDave Kleikamp es = sbi->s_es; 5580ac27a0ecSDave Kleikamp 5581b3881f74STheodore Ts'o if (sbi->s_journal) { 5582617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5583b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 5584b3881f74STheodore Ts'o } 5585ac27a0ecSDave Kleikamp 55861751e8a6SLinus Torvalds if (*flags & SB_LAZYTIME) 55871751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 5588a2fd66d0STheodore Ts'o 55891751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 55904ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 5591ac27a0ecSDave Kleikamp err = -EROFS; 5592ac27a0ecSDave Kleikamp goto restore_opts; 5593ac27a0ecSDave Kleikamp } 5594ac27a0ecSDave Kleikamp 55951751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 559638c03b34STheodore Ts'o err = sync_filesystem(sb); 559738c03b34STheodore Ts'o if (err < 0) 559838c03b34STheodore Ts'o goto restore_opts; 55990f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 56000f0dd62fSChristoph Hellwig if (err < 0) 5601c79d967dSChristoph Hellwig goto restore_opts; 5602c79d967dSChristoph Hellwig 5603ac27a0ecSDave Kleikamp /* 5604ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5605ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5606ac27a0ecSDave Kleikamp */ 56071751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5608ac27a0ecSDave Kleikamp 5609ac27a0ecSDave Kleikamp /* 5610ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5611ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5612ac27a0ecSDave Kleikamp * mark the partition as valid again. 5613ac27a0ecSDave Kleikamp */ 5614617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5615617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5616ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5617ac27a0ecSDave Kleikamp 561811215630SJan Kara if (sbi->s_journal) { 561911215630SJan Kara /* 562011215630SJan Kara * We let remount-ro finish even if marking fs 562111215630SJan Kara * as clean failed... 562211215630SJan Kara */ 5623617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 562411215630SJan Kara } 56252dca60d9STheodore Ts'o if (sbi->s_mmp_tsk) 56262dca60d9STheodore Ts'o kthread_stop(sbi->s_mmp_tsk); 5627ac27a0ecSDave Kleikamp } else { 5628a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5629e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 56302cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5631ac27a0ecSDave Kleikamp err = -EROFS; 5632ac27a0ecSDave Kleikamp goto restore_opts; 5633ac27a0ecSDave Kleikamp } 5634ead6596bSEric Sandeen /* 56358a266467STheodore Ts'o * Make sure the group descriptor checksums 56360b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 56378a266467STheodore Ts'o */ 56388a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 56398a266467STheodore Ts'o struct ext4_group_desc *gdp = 56408a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 56418a266467STheodore Ts'o 5642feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5643b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5644b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5645e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 56468a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 56476a797d27SDarrick J. Wong err = -EFSBADCRC; 56488a266467STheodore Ts'o goto restore_opts; 56498a266467STheodore Ts'o } 56508a266467STheodore Ts'o } 56518a266467STheodore Ts'o 56528a266467STheodore Ts'o /* 5653ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5654ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5655ead6596bSEric Sandeen * require a full umount/remount for now. 5656ead6596bSEric Sandeen */ 5657ead6596bSEric Sandeen if (es->s_last_orphan) { 5658b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5659ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5660ead6596bSEric Sandeen "orphan inode list. Please " 5661b31e1552SEric Sandeen "umount/remount instead"); 5662ead6596bSEric Sandeen err = -EINVAL; 5663ead6596bSEric Sandeen goto restore_opts; 5664ead6596bSEric Sandeen } 5665ead6596bSEric Sandeen 5666ac27a0ecSDave Kleikamp /* 5667*bc71726cSzhangyi (F) * Update the original bdev mapping's wb_err value 5668*bc71726cSzhangyi (F) * which could be used to detect the metadata async 5669*bc71726cSzhangyi (F) * write error. 5670*bc71726cSzhangyi (F) */ 5671*bc71726cSzhangyi (F) errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err, 5672*bc71726cSzhangyi (F) &sbi->s_bdev_wb_err); 5673*bc71726cSzhangyi (F) 5674*bc71726cSzhangyi (F) /* 5675ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5676ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5677ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5678ac27a0ecSDave Kleikamp * the partition.) 5679ac27a0ecSDave Kleikamp */ 568011215630SJan Kara if (sbi->s_journal) { 568111215630SJan Kara err = ext4_clear_journal_err(sb, es); 568211215630SJan Kara if (err) 568311215630SJan Kara goto restore_opts; 568411215630SJan Kara } 5685ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5686c89128a0SJaegeuk Kim 5687c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 5688c89128a0SJaegeuk Kim if (err) 5689c89128a0SJaegeuk Kim goto restore_opts; 5690c89128a0SJaegeuk Kim 56911751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 5692e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5693c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5694c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5695c5e06d10SJohann Lombardi err = -EROFS; 5696c5e06d10SJohann Lombardi goto restore_opts; 5697c5e06d10SJohann Lombardi } 5698c79d967dSChristoph Hellwig enable_quota = 1; 5699ac27a0ecSDave Kleikamp } 5700ac27a0ecSDave Kleikamp } 5701bfff6873SLukas Czerner 5702bfff6873SLukas Czerner /* 5703bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5704bfff6873SLukas Czerner * current settings 5705bfff6873SLukas Czerner */ 5706bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 5707bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5708bfff6873SLukas Czerner else { 5709bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5710bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5711bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5712bfff6873SLukas Czerner } 5713bfff6873SLukas Czerner 57146fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5715c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 5716c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 5717c89128a0SJaegeuk Kim if (err) 5718c89128a0SJaegeuk Kim goto restore_opts; 5719c89128a0SJaegeuk Kim } 57200390131bSFrank Mayhar 5721ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5722ac27a0ecSDave Kleikamp /* Release old quota file names */ 5723a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5724ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 57257c319d32SAditya Kali if (enable_quota) { 57267c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 57270f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5728e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 57297c319d32SAditya Kali err = ext4_enable_quotas(sb); 573007724f98STheodore Ts'o if (err) 57317c319d32SAditya Kali goto restore_opts; 57327c319d32SAditya Kali } 57337c319d32SAditya Kali } 57347c319d32SAditya Kali #endif 5735d4c402d9SCurt Wohlgemuth 57361751e8a6SLinus Torvalds *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME); 5737d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5738d4c402d9SCurt Wohlgemuth kfree(orig_data); 5739ac27a0ecSDave Kleikamp return 0; 57400b8e58a1SAndreas Dilger 5741ac27a0ecSDave Kleikamp restore_opts: 5742ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5743ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5744a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5745ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5746ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5747ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 574830773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 574930773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5750ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5751ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5752a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 575333458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 575433458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 5755ac27a0ecSDave Kleikamp } 575633458eabSTheodore Ts'o synchronize_rcu(); 575733458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 575833458eabSTheodore Ts'o kfree(to_free[i]); 5759ac27a0ecSDave Kleikamp #endif 5760d4c402d9SCurt Wohlgemuth kfree(orig_data); 5761ac27a0ecSDave Kleikamp return err; 5762ac27a0ecSDave Kleikamp } 5763ac27a0ecSDave Kleikamp 5764689c958cSLi Xi #ifdef CONFIG_QUOTA 5765689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5766689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5767689c958cSLi Xi { 5768689c958cSLi Xi struct kqid qid; 5769689c958cSLi Xi struct dquot *dquot; 5770689c958cSLi Xi u64 limit; 5771689c958cSLi Xi u64 curblock; 5772689c958cSLi Xi 5773689c958cSLi Xi qid = make_kqid_projid(projid); 5774689c958cSLi Xi dquot = dqget(sb, qid); 5775689c958cSLi Xi if (IS_ERR(dquot)) 5776689c958cSLi Xi return PTR_ERR(dquot); 57777b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 5778689c958cSLi Xi 5779a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_bsoftlimit, 5780a08fe66eSChengguang Xu dquot->dq_dqb.dqb_bhardlimit); 578157c32ea4SChengguang Xu limit >>= sb->s_blocksize_bits; 578257c32ea4SChengguang Xu 5783689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5784f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 5785f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 5786689c958cSLi Xi buf->f_blocks = limit; 5787689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5788689c958cSLi Xi (buf->f_blocks > curblock) ? 5789689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5790689c958cSLi Xi } 5791689c958cSLi Xi 5792a08fe66eSChengguang Xu limit = min_not_zero(dquot->dq_dqb.dqb_isoftlimit, 5793a08fe66eSChengguang Xu dquot->dq_dqb.dqb_ihardlimit); 5794689c958cSLi Xi if (limit && buf->f_files > limit) { 5795689c958cSLi Xi buf->f_files = limit; 5796689c958cSLi Xi buf->f_ffree = 5797689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5798689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5799689c958cSLi Xi } 5800689c958cSLi Xi 58017b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 5802689c958cSLi Xi dqput(dquot); 5803689c958cSLi Xi return 0; 5804689c958cSLi Xi } 5805689c958cSLi Xi #endif 5806689c958cSLi Xi 5807617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5808ac27a0ecSDave Kleikamp { 5809ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5810617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5811617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 581227dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5813960cc398SPekka Enberg u64 fsid; 5814d02a9391SKazuya Mio s64 bfree; 581527dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5816ac27a0ecSDave Kleikamp 5817952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5818952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5819ac27a0ecSDave Kleikamp 5820617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5821ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5822b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 582357042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 582457042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5825d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 582657042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 582727dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 582827dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 582927dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5830ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5831ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 583252d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5833617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5834960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5835960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5836960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5837960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 58380b8e58a1SAndreas Dilger 5839689c958cSLi Xi #ifdef CONFIG_QUOTA 5840689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5841689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5842689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5843689c958cSLi Xi #endif 5844ac27a0ecSDave Kleikamp return 0; 5845ac27a0ecSDave Kleikamp } 5846ac27a0ecSDave Kleikamp 5847ac27a0ecSDave Kleikamp 5848ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5849ac27a0ecSDave Kleikamp 5850bc8230eeSJan Kara /* 5851bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 5852bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 5853bc8230eeSJan Kara */ 5854ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5855ac27a0ecSDave Kleikamp { 58564c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5857ac27a0ecSDave Kleikamp } 5858ac27a0ecSDave Kleikamp 5859617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5860ac27a0ecSDave Kleikamp { 5861ac27a0ecSDave Kleikamp int ret, err; 5862ac27a0ecSDave Kleikamp handle_t *handle; 5863ac27a0ecSDave Kleikamp struct inode *inode; 5864ac27a0ecSDave Kleikamp 5865ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 58669924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5867617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5868ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5869ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5870ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5871617ba13bSMingming Cao err = ext4_journal_stop(handle); 5872ac27a0ecSDave Kleikamp if (!ret) 5873ac27a0ecSDave Kleikamp ret = err; 5874ac27a0ecSDave Kleikamp return ret; 5875ac27a0ecSDave Kleikamp } 5876ac27a0ecSDave Kleikamp 5877617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5878ac27a0ecSDave Kleikamp { 5879ac27a0ecSDave Kleikamp int ret, err; 5880ac27a0ecSDave Kleikamp handle_t *handle; 5881ac27a0ecSDave Kleikamp 58829924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5883617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5884ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5885ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5886ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5887617ba13bSMingming Cao err = ext4_journal_stop(handle); 5888ac27a0ecSDave Kleikamp if (!ret) 5889ac27a0ecSDave Kleikamp ret = err; 5890ac27a0ecSDave Kleikamp return ret; 5891ac27a0ecSDave Kleikamp } 5892ac27a0ecSDave Kleikamp 5893617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5894ac27a0ecSDave Kleikamp { 5895ac27a0ecSDave Kleikamp int ret, err; 5896ac27a0ecSDave Kleikamp handle_t *handle; 5897ac27a0ecSDave Kleikamp 58989924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5899617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 59009c3013e9SJan Kara if (IS_ERR(handle)) { 59019c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 59029c3013e9SJan Kara dquot_release(dquot); 5903ac27a0ecSDave Kleikamp return PTR_ERR(handle); 59049c3013e9SJan Kara } 5905ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5906617ba13bSMingming Cao err = ext4_journal_stop(handle); 5907ac27a0ecSDave Kleikamp if (!ret) 5908ac27a0ecSDave Kleikamp ret = err; 5909ac27a0ecSDave Kleikamp return ret; 5910ac27a0ecSDave Kleikamp } 5911ac27a0ecSDave Kleikamp 5912617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5913ac27a0ecSDave Kleikamp { 5914262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5915262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5916262b4662SJan Kara 59172c8be6b2SJan Kara /* Are we journaling quotas? */ 5918e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5919262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5920ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5921617ba13bSMingming Cao return ext4_write_dquot(dquot); 5922ac27a0ecSDave Kleikamp } else { 5923ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5924ac27a0ecSDave Kleikamp } 5925ac27a0ecSDave Kleikamp } 5926ac27a0ecSDave Kleikamp 5927617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5928ac27a0ecSDave Kleikamp { 5929ac27a0ecSDave Kleikamp int ret, err; 5930ac27a0ecSDave Kleikamp handle_t *handle; 5931ac27a0ecSDave Kleikamp 5932ac27a0ecSDave Kleikamp /* Data block + inode block */ 59332b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5934ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5935ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5936ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5937617ba13bSMingming Cao err = ext4_journal_stop(handle); 5938ac27a0ecSDave Kleikamp if (!ret) 5939ac27a0ecSDave Kleikamp ret = err; 5940ac27a0ecSDave Kleikamp return ret; 5941ac27a0ecSDave Kleikamp } 5942ac27a0ecSDave Kleikamp 5943ac27a0ecSDave Kleikamp /* 5944ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5945ac27a0ecSDave Kleikamp * the quota file and such... 5946ac27a0ecSDave Kleikamp */ 5947617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5948ac27a0ecSDave Kleikamp { 594933458eabSTheodore Ts'o return dquot_quota_on_mount(sb, get_qf_name(sb, EXT4_SB(sb), type), 5950617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5951ac27a0ecSDave Kleikamp } 5952ac27a0ecSDave Kleikamp 5953daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5954daf647d2STheodore Ts'o { 5955daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5956daf647d2STheodore Ts'o 5957daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5958daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5959daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5960daf647d2STheodore Ts'o * because the name of the lock is set using the 5961daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5962daf647d2STheodore Ts'o */ 5963daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5964daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5965daf647d2STheodore Ts'o } 5966daf647d2STheodore Ts'o 5967ac27a0ecSDave Kleikamp /* 5968ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5969ac27a0ecSDave Kleikamp */ 5970617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 59718c54ca9cSAl Viro const struct path *path) 5972ac27a0ecSDave Kleikamp { 5973ac27a0ecSDave Kleikamp int err; 5974ac27a0ecSDave Kleikamp 5975ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5976ac27a0ecSDave Kleikamp return -EINVAL; 59770623543bSJan Kara 5978ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5979d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5980ac27a0ecSDave Kleikamp return -EXDEV; 59810623543bSJan Kara /* Journaling quota? */ 59820623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 59832b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5984f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5985b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5986b31e1552SEric Sandeen "Quota file not on filesystem root. " 5987b31e1552SEric Sandeen "Journaled quota will not work"); 598891389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 598991389240SJan Kara } else { 599091389240SJan Kara /* 599191389240SJan Kara * Clear the flag just in case mount options changed since 599291389240SJan Kara * last time. 599391389240SJan Kara */ 599491389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 59950623543bSJan Kara } 59960623543bSJan Kara 59970623543bSJan Kara /* 59980623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 59990623543bSJan Kara * all updates to the file when we bypass pagecache... 60000623543bSJan Kara */ 60010390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 60022b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 60030623543bSJan Kara /* 60040623543bSJan Kara * We don't need to lock updates but journal_flush() could 60050623543bSJan Kara * otherwise be livelocked... 60060623543bSJan Kara */ 60070623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 60087ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 60090623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 6010f00c9e44SJan Kara if (err) 60117ffe1ea8SHidehiro Kawai return err; 60127ffe1ea8SHidehiro Kawai } 6013957153fcSJan Kara 6014daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 6015daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 6016957153fcSJan Kara if (err) { 6017daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 6018daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 6019957153fcSJan Kara } else { 6020957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 6021957153fcSJan Kara handle_t *handle; 6022957153fcSJan Kara 602361a92987SJan Kara /* 602461a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 602561a92987SJan Kara * files. If this fails, we return success anyway since quotas 602661a92987SJan Kara * are already enabled and this is not a hard failure. 602761a92987SJan Kara */ 6028957153fcSJan Kara inode_lock(inode); 6029957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 6030957153fcSJan Kara if (IS_ERR(handle)) 6031957153fcSJan Kara goto unlock_inode; 6032957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 6033957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 6034957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 60354209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 6036957153fcSJan Kara ext4_journal_stop(handle); 6037957153fcSJan Kara unlock_inode: 6038957153fcSJan Kara inode_unlock(inode); 6039957153fcSJan Kara } 6040daf647d2STheodore Ts'o return err; 6041ac27a0ecSDave Kleikamp } 6042ac27a0ecSDave Kleikamp 60437c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 60447c319d32SAditya Kali unsigned int flags) 60457c319d32SAditya Kali { 60467c319d32SAditya Kali int err; 60477c319d32SAditya Kali struct inode *qf_inode; 6048a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 60497c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6050689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6051689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 60527c319d32SAditya Kali }; 60537c319d32SAditya Kali 6054e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 60557c319d32SAditya Kali 60567c319d32SAditya Kali if (!qf_inums[type]) 60577c319d32SAditya Kali return -EPERM; 60587c319d32SAditya Kali 60598a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 60607c319d32SAditya Kali if (IS_ERR(qf_inode)) { 60617c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 60627c319d32SAditya Kali return PTR_ERR(qf_inode); 60637c319d32SAditya Kali } 60647c319d32SAditya Kali 6065bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 6066bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 6067daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 60687212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 6069daf647d2STheodore Ts'o if (err) 6070daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 607161157b24SPan Bian iput(qf_inode); 60727c319d32SAditya Kali 60737c319d32SAditya Kali return err; 60747c319d32SAditya Kali } 60757c319d32SAditya Kali 60767c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 60777c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 60787c319d32SAditya Kali { 60797c319d32SAditya Kali int type, err = 0; 6080a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 60817c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 6082689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 6083689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 60847c319d32SAditya Kali }; 608549da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 608649da9392SJan Kara test_opt(sb, USRQUOTA), 608749da9392SJan Kara test_opt(sb, GRPQUOTA), 608849da9392SJan Kara test_opt(sb, PRJQUOTA), 608949da9392SJan Kara }; 60907c319d32SAditya Kali 609191389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 6092a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 60937c319d32SAditya Kali if (qf_inums[type]) { 60947c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 609549da9392SJan Kara DQUOT_USAGE_ENABLED | 609649da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 60977c319d32SAditya Kali if (err) { 60987c319d32SAditya Kali ext4_warning(sb, 609972ba7450STheodore Ts'o "Failed to enable quota tracking " 610072ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 610172ba7450STheodore Ts'o "e2fsck to fix.", type, err); 61027f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 61037f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 61047f144fd0SJunichi Uekawa 61057c319d32SAditya Kali return err; 61067c319d32SAditya Kali } 61077c319d32SAditya Kali } 61087c319d32SAditya Kali } 61097c319d32SAditya Kali return 0; 61107c319d32SAditya Kali } 61117c319d32SAditya Kali 6112ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 6113ca0e05e4SDmitry Monakhov { 611421f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 611521f97697SJan Kara handle_t *handle; 6116957153fcSJan Kara int err; 611721f97697SJan Kara 611887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 611987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 612087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 6121ca0e05e4SDmitry Monakhov sync_filesystem(sb); 6122ca0e05e4SDmitry Monakhov 6123957153fcSJan Kara if (!inode || !igrab(inode)) 61240b268590SAmir Goldstein goto out; 61250b268590SAmir Goldstein 6126957153fcSJan Kara err = dquot_quota_off(sb, type); 6127964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 6128957153fcSJan Kara goto out_put; 6129957153fcSJan Kara 6130957153fcSJan Kara inode_lock(inode); 613161a92987SJan Kara /* 613261a92987SJan Kara * Update modification times of quota files when userspace can 613361a92987SJan Kara * start looking at them. If we fail, we return success anyway since 613461a92987SJan Kara * this is not a hard failure and quotas are already disabled. 613561a92987SJan Kara */ 61369924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 61374209ae12SHarshad Shirwadkar if (IS_ERR(handle)) { 61384209ae12SHarshad Shirwadkar err = PTR_ERR(handle); 6139957153fcSJan Kara goto out_unlock; 61404209ae12SHarshad Shirwadkar } 6141957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 6142957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 6143eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 61444209ae12SHarshad Shirwadkar err = ext4_mark_inode_dirty(handle, inode); 614521f97697SJan Kara ext4_journal_stop(handle); 6146957153fcSJan Kara out_unlock: 6147957153fcSJan Kara inode_unlock(inode); 6148957153fcSJan Kara out_put: 6149964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 6150957153fcSJan Kara iput(inode); 6151957153fcSJan Kara return err; 615221f97697SJan Kara out: 6153ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 6154ca0e05e4SDmitry Monakhov } 6155ca0e05e4SDmitry Monakhov 6156ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 6157ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 6158ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 6159ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 6160617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6161ac27a0ecSDave Kleikamp size_t len, loff_t off) 6162ac27a0ecSDave Kleikamp { 6163ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6164725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6165ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 6166ac27a0ecSDave Kleikamp int tocopy; 6167ac27a0ecSDave Kleikamp size_t toread; 6168ac27a0ecSDave Kleikamp struct buffer_head *bh; 6169ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 6170ac27a0ecSDave Kleikamp 6171ac27a0ecSDave Kleikamp if (off > i_size) 6172ac27a0ecSDave Kleikamp return 0; 6173ac27a0ecSDave Kleikamp if (off+len > i_size) 6174ac27a0ecSDave Kleikamp len = i_size-off; 6175ac27a0ecSDave Kleikamp toread = len; 6176ac27a0ecSDave Kleikamp while (toread > 0) { 6177ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 6178ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 61791c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 61801c215028STheodore Ts'o if (IS_ERR(bh)) 61811c215028STheodore Ts'o return PTR_ERR(bh); 6182ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 6183ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 6184ac27a0ecSDave Kleikamp else 6185ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 6186ac27a0ecSDave Kleikamp brelse(bh); 6187ac27a0ecSDave Kleikamp offset = 0; 6188ac27a0ecSDave Kleikamp toread -= tocopy; 6189ac27a0ecSDave Kleikamp data += tocopy; 6190ac27a0ecSDave Kleikamp blk++; 6191ac27a0ecSDave Kleikamp } 6192ac27a0ecSDave Kleikamp return len; 6193ac27a0ecSDave Kleikamp } 6194ac27a0ecSDave Kleikamp 6195ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 6196ac27a0ecSDave Kleikamp * enough credits) */ 6197617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 6198ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 6199ac27a0ecSDave Kleikamp { 6200ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 6201725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 62024209ae12SHarshad Shirwadkar int err = 0, err2 = 0, offset = off & (sb->s_blocksize - 1); 6203c5e298aeSTheodore Ts'o int retries = 0; 6204ac27a0ecSDave Kleikamp struct buffer_head *bh; 6205ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 6206ac27a0ecSDave Kleikamp 62070390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 6208b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 6209b31e1552SEric Sandeen " cancelled because transaction is not started", 62109c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 62119c3013e9SJan Kara return -EIO; 62129c3013e9SJan Kara } 621367eeb568SDmitry Monakhov /* 621467eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 621567eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 621667eeb568SDmitry Monakhov */ 621767eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 621867eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 621967eeb568SDmitry Monakhov " cancelled because not block aligned", 622067eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 622167eeb568SDmitry Monakhov return -EIO; 622267eeb568SDmitry Monakhov } 622367eeb568SDmitry Monakhov 6224c5e298aeSTheodore Ts'o do { 6225c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 6226c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 6227c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 622845586c70SMasahiro Yamada } while (PTR_ERR(bh) == -ENOSPC && 6229c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 62301c215028STheodore Ts'o if (IS_ERR(bh)) 62311c215028STheodore Ts'o return PTR_ERR(bh); 6232ac27a0ecSDave Kleikamp if (!bh) 6233ac27a0ecSDave Kleikamp goto out; 62345d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 6235617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 6236ac27a0ecSDave Kleikamp if (err) { 6237ac27a0ecSDave Kleikamp brelse(bh); 62381c215028STheodore Ts'o return err; 6239ac27a0ecSDave Kleikamp } 6240ac27a0ecSDave Kleikamp lock_buffer(bh); 624167eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6242ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6243ac27a0ecSDave Kleikamp unlock_buffer(bh); 62440390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6245ac27a0ecSDave Kleikamp brelse(bh); 6246ac27a0ecSDave Kleikamp out: 624767eeb568SDmitry Monakhov if (inode->i_size < off + len) { 624867eeb568SDmitry Monakhov i_size_write(inode, off + len); 6249617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 62504209ae12SHarshad Shirwadkar err2 = ext4_mark_inode_dirty(handle, inode); 62514209ae12SHarshad Shirwadkar if (unlikely(err2 && !err)) 62524209ae12SHarshad Shirwadkar err = err2; 625321f97697SJan Kara } 62544209ae12SHarshad Shirwadkar return err ? err : len; 6255ac27a0ecSDave Kleikamp } 6256ac27a0ecSDave Kleikamp #endif 6257ac27a0ecSDave Kleikamp 6258152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 6259152a0836SAl Viro const char *dev_name, void *data) 6260ac27a0ecSDave Kleikamp { 6261152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 6262ac27a0ecSDave Kleikamp } 6263ac27a0ecSDave Kleikamp 6264c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 626524b58424STheodore Ts'o static inline void register_as_ext2(void) 626624b58424STheodore Ts'o { 626724b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 626824b58424STheodore Ts'o if (err) 626924b58424STheodore Ts'o printk(KERN_WARNING 627024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 627124b58424STheodore Ts'o } 627224b58424STheodore Ts'o 627324b58424STheodore Ts'o static inline void unregister_as_ext2(void) 627424b58424STheodore Ts'o { 627524b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 627624b58424STheodore Ts'o } 62772035e776STheodore Ts'o 62782035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 62792035e776STheodore Ts'o { 6280e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 62812035e776STheodore Ts'o return 0; 6282bc98a42cSDavid Howells if (sb_rdonly(sb)) 62832035e776STheodore Ts'o return 1; 6284e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 62852035e776STheodore Ts'o return 0; 62862035e776STheodore Ts'o return 1; 62872035e776STheodore Ts'o } 628824b58424STheodore Ts'o #else 628924b58424STheodore Ts'o static inline void register_as_ext2(void) { } 629024b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 62912035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 629224b58424STheodore Ts'o #endif 629324b58424STheodore Ts'o 629424b58424STheodore Ts'o static inline void register_as_ext3(void) 629524b58424STheodore Ts'o { 629624b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 629724b58424STheodore Ts'o if (err) 629824b58424STheodore Ts'o printk(KERN_WARNING 629924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 630024b58424STheodore Ts'o } 630124b58424STheodore Ts'o 630224b58424STheodore Ts'o static inline void unregister_as_ext3(void) 630324b58424STheodore Ts'o { 630424b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 630524b58424STheodore Ts'o } 63062035e776STheodore Ts'o 63072035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 63082035e776STheodore Ts'o { 6309e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 63102035e776STheodore Ts'o return 0; 6311e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 63122035e776STheodore Ts'o return 0; 6313bc98a42cSDavid Howells if (sb_rdonly(sb)) 63142035e776STheodore Ts'o return 1; 6315e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 63162035e776STheodore Ts'o return 0; 63172035e776STheodore Ts'o return 1; 63182035e776STheodore Ts'o } 631924b58424STheodore Ts'o 632003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 6321ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 632203010a33STheodore Ts'o .name = "ext4", 6323152a0836SAl Viro .mount = ext4_mount, 6324ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 6325ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 6326ac27a0ecSDave Kleikamp }; 63277f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 6328ac27a0ecSDave Kleikamp 6329e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 6330e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 6331e9e3bcecSEric Sandeen 63325dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 6333ac27a0ecSDave Kleikamp { 6334e9e3bcecSEric Sandeen int i, err; 6335c9de560dSAlex Tomas 6336e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 633707c0c5d8SAl Viro ext4_li_info = NULL; 633807c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 633907c0c5d8SAl Viro 63409a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 634112e9b892SDmitry Monakhov ext4_check_flag_values(); 6342e9e3bcecSEric Sandeen 6343e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 6344e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 6345e9e3bcecSEric Sandeen 634651865fdaSZheng Liu err = ext4_init_es(); 63476fd058f7STheodore Ts'o if (err) 63486fd058f7STheodore Ts'o return err; 634951865fdaSZheng Liu 63501dc0aa46SEric Whitney err = ext4_init_pending(); 63511dc0aa46SEric Whitney if (err) 635222cfe4b4SEric Biggers goto out7; 635322cfe4b4SEric Biggers 635422cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 635522cfe4b4SEric Biggers if (err) 63561dc0aa46SEric Whitney goto out6; 63571dc0aa46SEric Whitney 635851865fdaSZheng Liu err = ext4_init_pageio(); 635951865fdaSZheng Liu if (err) 6360b5799018STheodore Ts'o goto out5; 636151865fdaSZheng Liu 63625dabfc78STheodore Ts'o err = ext4_init_system_zone(); 6363bd2d0210STheodore Ts'o if (err) 6364b5799018STheodore Ts'o goto out4; 6365857ac889SLukas Czerner 6366b5799018STheodore Ts'o err = ext4_init_sysfs(); 6367dd68314cSTheodore Ts'o if (err) 6368b5799018STheodore Ts'o goto out3; 6369857ac889SLukas Czerner 63705dabfc78STheodore Ts'o err = ext4_init_mballoc(); 6371ac27a0ecSDave Kleikamp if (err) 6372c9de560dSAlex Tomas goto out2; 6373ac27a0ecSDave Kleikamp err = init_inodecache(); 6374ac27a0ecSDave Kleikamp if (err) 6375ac27a0ecSDave Kleikamp goto out1; 637624b58424STheodore Ts'o register_as_ext3(); 63772035e776STheodore Ts'o register_as_ext2(); 637803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 6379ac27a0ecSDave Kleikamp if (err) 6380ac27a0ecSDave Kleikamp goto out; 6381bfff6873SLukas Czerner 6382ac27a0ecSDave Kleikamp return 0; 6383ac27a0ecSDave Kleikamp out: 638424b58424STheodore Ts'o unregister_as_ext2(); 638524b58424STheodore Ts'o unregister_as_ext3(); 6386ac27a0ecSDave Kleikamp destroy_inodecache(); 6387ac27a0ecSDave Kleikamp out1: 63885dabfc78STheodore Ts'o ext4_exit_mballoc(); 63899c191f70ST Makphaibulchoke out2: 6390b5799018STheodore Ts'o ext4_exit_sysfs(); 6391b5799018STheodore Ts'o out3: 6392dd68314cSTheodore Ts'o ext4_exit_system_zone(); 6393b5799018STheodore Ts'o out4: 63945dabfc78STheodore Ts'o ext4_exit_pageio(); 6395b5799018STheodore Ts'o out5: 639622cfe4b4SEric Biggers ext4_exit_post_read_processing(); 63971dc0aa46SEric Whitney out6: 639822cfe4b4SEric Biggers ext4_exit_pending(); 639922cfe4b4SEric Biggers out7: 640051865fdaSZheng Liu ext4_exit_es(); 640151865fdaSZheng Liu 6402ac27a0ecSDave Kleikamp return err; 6403ac27a0ecSDave Kleikamp } 6404ac27a0ecSDave Kleikamp 64055dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 6406ac27a0ecSDave Kleikamp { 6407bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 640824b58424STheodore Ts'o unregister_as_ext2(); 640924b58424STheodore Ts'o unregister_as_ext3(); 641003010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 6411ac27a0ecSDave Kleikamp destroy_inodecache(); 64125dabfc78STheodore Ts'o ext4_exit_mballoc(); 6413b5799018STheodore Ts'o ext4_exit_sysfs(); 64145dabfc78STheodore Ts'o ext4_exit_system_zone(); 64155dabfc78STheodore Ts'o ext4_exit_pageio(); 641622cfe4b4SEric Biggers ext4_exit_post_read_processing(); 6417dd12ed14SEric Sandeen ext4_exit_es(); 64181dc0aa46SEric Whitney ext4_exit_pending(); 6419ac27a0ecSDave Kleikamp } 6420ac27a0ecSDave Kleikamp 6421ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 642283982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 6423ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 64247ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 64255dabfc78STheodore Ts'o module_init(ext4_init_fs) 64265dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 6427