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> 46ac27a0ecSDave Kleikamp 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); 69617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 70617ba13bSMingming Cao struct ext4_super_block *es); 71617ba13bSMingming Cao static void 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: 96e74031fdSJan Kara * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> 97e74031fdSJan Kara * page lock -> i_data_sem (rw) 98e74031fdSJan Kara * 99e74031fdSJan Kara * buffered write path: 100e74031fdSJan Kara * sb_start_write -> i_mutex -> mmap_sem 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: 1101d39834fSNikolay Borisov * sb_start_write -> i_mutex -> mmap_sem 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); 157*cf2834a5STheodore 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 2079933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 2089933fc0aSTheodore Ts'o { 2099933fc0aSTheodore Ts'o void *ret; 2109933fc0aSTheodore Ts'o 2118be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 2129933fc0aSTheodore Ts'o if (!ret) 2139933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 2149933fc0aSTheodore Ts'o return ret; 2159933fc0aSTheodore Ts'o } 2169933fc0aSTheodore Ts'o 2179933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 2189933fc0aSTheodore Ts'o { 2199933fc0aSTheodore Ts'o void *ret; 2209933fc0aSTheodore Ts'o 2218be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 2229933fc0aSTheodore Ts'o if (!ret) 2239933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 2249933fc0aSTheodore Ts'o return ret; 2259933fc0aSTheodore Ts'o } 2269933fc0aSTheodore Ts'o 2278fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 2288fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 229bd81d8eeSLaurent Vivier { 2303a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 2318fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2328fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 233bd81d8eeSLaurent Vivier } 234bd81d8eeSLaurent Vivier 2358fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 2368fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 237bd81d8eeSLaurent Vivier { 2385272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2398fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2408fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 241bd81d8eeSLaurent Vivier } 242bd81d8eeSLaurent Vivier 2438fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2448fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 245bd81d8eeSLaurent Vivier { 2465272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2478fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2488fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 249bd81d8eeSLaurent Vivier } 250bd81d8eeSLaurent Vivier 251021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 252560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 253560671a0SAneesh Kumar K.V { 254560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 255560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 256560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 257560671a0SAneesh Kumar K.V } 258560671a0SAneesh Kumar K.V 259560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 260560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 261560671a0SAneesh Kumar K.V { 262560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 263560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 264560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 265560671a0SAneesh Kumar K.V } 266560671a0SAneesh Kumar K.V 267560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 268560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 269560671a0SAneesh Kumar K.V { 270560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 271560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 272560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 273560671a0SAneesh Kumar K.V } 274560671a0SAneesh Kumar K.V 275560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 276560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 277560671a0SAneesh Kumar K.V { 278560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 279560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 280560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 281560671a0SAneesh Kumar K.V } 282560671a0SAneesh Kumar K.V 2838fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2848fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 285bd81d8eeSLaurent Vivier { 2863a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2878fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2888fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 289bd81d8eeSLaurent Vivier } 290bd81d8eeSLaurent Vivier 2918fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2928fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 293bd81d8eeSLaurent Vivier { 2945272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2958fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2968fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 297bd81d8eeSLaurent Vivier } 298bd81d8eeSLaurent Vivier 2998fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 3008fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 301bd81d8eeSLaurent Vivier { 3025272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 3038fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 3048fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 305bd81d8eeSLaurent Vivier } 306bd81d8eeSLaurent Vivier 307021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 308560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 309560671a0SAneesh Kumar K.V { 310560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 311560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 312560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 313560671a0SAneesh Kumar K.V } 314560671a0SAneesh Kumar K.V 315560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 316560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 317560671a0SAneesh Kumar K.V { 318560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 319560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 320560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 321560671a0SAneesh Kumar K.V } 322560671a0SAneesh Kumar K.V 323560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 324560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 325560671a0SAneesh Kumar K.V { 326560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 327560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 328560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 329560671a0SAneesh Kumar K.V } 330560671a0SAneesh Kumar K.V 331560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 332560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 333560671a0SAneesh Kumar K.V { 334560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 335560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 336560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 337560671a0SAneesh Kumar K.V } 338560671a0SAneesh Kumar K.V 3396a0678a7SArnd Bergmann static void __ext4_update_tstamp(__le32 *lo, __u8 *hi) 3406a0678a7SArnd Bergmann { 3416a0678a7SArnd Bergmann time64_t now = ktime_get_real_seconds(); 3426a0678a7SArnd Bergmann 3436a0678a7SArnd Bergmann now = clamp_val(now, 0, (1ull << 40) - 1); 3446a0678a7SArnd Bergmann 3456a0678a7SArnd Bergmann *lo = cpu_to_le32(lower_32_bits(now)); 3466a0678a7SArnd Bergmann *hi = upper_32_bits(now); 3476a0678a7SArnd Bergmann } 3486a0678a7SArnd Bergmann 3496a0678a7SArnd Bergmann static time64_t __ext4_get_tstamp(__le32 *lo, __u8 *hi) 3506a0678a7SArnd Bergmann { 3516a0678a7SArnd Bergmann return ((time64_t)(*hi) << 32) + le32_to_cpu(*lo); 3526a0678a7SArnd Bergmann } 3536a0678a7SArnd Bergmann #define ext4_update_tstamp(es, tstamp) \ 3546a0678a7SArnd Bergmann __ext4_update_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 3556a0678a7SArnd Bergmann #define ext4_get_tstamp(es, tstamp) \ 3566a0678a7SArnd Bergmann __ext4_get_tstamp(&(es)->tstamp, &(es)->tstamp ## _hi) 357d3d1faf6SCurt Wohlgemuth 3581c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3591c13d5c0STheodore Ts'o unsigned int line) 3601c13d5c0STheodore Ts'o { 3611c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3621c13d5c0STheodore Ts'o 3631c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3641b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 3651b46617bSTheodore Ts'o return; 3661c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3676a0678a7SArnd Bergmann ext4_update_tstamp(es, s_last_error_time); 3681c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3691c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3701c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3711c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3726a0678a7SArnd Bergmann es->s_first_error_time_hi = es->s_last_error_time_hi; 3731c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3741c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3751c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3761c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3771c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3781c13d5c0STheodore Ts'o } 37966e61a9eSTheodore Ts'o /* 38066e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 38166e61a9eSTheodore Ts'o * started already 38266e61a9eSTheodore Ts'o */ 38366e61a9eSTheodore Ts'o if (!es->s_error_count) 38466e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 385ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3861c13d5c0STheodore Ts'o } 3871c13d5c0STheodore Ts'o 3881c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3891c13d5c0STheodore Ts'o unsigned int line) 3901c13d5c0STheodore Ts'o { 3911c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3921c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3931c13d5c0STheodore Ts'o } 3941c13d5c0STheodore Ts'o 395bdfe0cbdSTheodore Ts'o /* 396bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 397bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 398bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 399bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 400bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 401bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 402bdfe0cbdSTheodore Ts'o */ 403bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 404bdfe0cbdSTheodore Ts'o { 405bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 406bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 407bdfe0cbdSTheodore Ts'o 408bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 409bdfe0cbdSTheodore Ts'o } 410bdfe0cbdSTheodore Ts'o 41118aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 41218aadd47SBobi Jam { 41318aadd47SBobi Jam struct super_block *sb = journal->j_private; 41418aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 41518aadd47SBobi Jam int error = is_journal_aborted(journal); 4165d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 41718aadd47SBobi Jam 4185d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 419a0154344SDaeho Jeong 420a0154344SDaeho Jeong ext4_process_freed_data(sb, txn->t_tid); 421a0154344SDaeho Jeong 42218aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 4235d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 4245d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 4255d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 42618aadd47SBobi Jam list_del_init(&jce->jce_list); 42718aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 42818aadd47SBobi Jam jce->jce_func(sb, jce, error); 42918aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 43018aadd47SBobi Jam } 43118aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 43218aadd47SBobi Jam } 4331c13d5c0STheodore Ts'o 4341dc1097fSJan Kara static bool system_going_down(void) 4351dc1097fSJan Kara { 4361dc1097fSJan Kara return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF 4371dc1097fSJan Kara || system_state == SYSTEM_RESTART; 4381dc1097fSJan Kara } 4391dc1097fSJan Kara 440ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 441ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 442ac27a0ecSDave Kleikamp * 443ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 444617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 445ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 446ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 447ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 448ac27a0ecSDave Kleikamp * write out the superblock safely. 449ac27a0ecSDave Kleikamp * 450dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 451d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 452ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 453ac27a0ecSDave Kleikamp */ 454ac27a0ecSDave Kleikamp 455617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 456ac27a0ecSDave Kleikamp { 457327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 458327eaf73STheodore Ts'o WARN_ON_ONCE(1); 459327eaf73STheodore Ts'o 460bc98a42cSDavid Howells if (sb_rdonly(sb)) 461ac27a0ecSDave Kleikamp return; 462ac27a0ecSDave Kleikamp 463ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 464617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 465ac27a0ecSDave Kleikamp 4664ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 467ac27a0ecSDave Kleikamp if (journal) 468dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 469ac27a0ecSDave Kleikamp } 4701dc1097fSJan Kara /* 4711dc1097fSJan Kara * We force ERRORS_RO behavior when system is rebooting. Otherwise we 4721dc1097fSJan Kara * could panic during 'reboot -f' as the underlying device got already 4731dc1097fSJan Kara * disabled. 4741dc1097fSJan Kara */ 4751dc1097fSJan Kara if (test_opt(sb, ERRORS_RO) || system_going_down()) { 476b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4774418e141SDmitry Monakhov /* 4784418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4794418e141SDmitry Monakhov * before ->s_flags update 4804418e141SDmitry Monakhov */ 4814418e141SDmitry Monakhov smp_wmb(); 4821751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4831dc1097fSJan Kara } else if (test_opt(sb, ERRORS_PANIC)) { 4844327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 4854327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 4864327ba52SDaeho Jeong return; 487617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 488ac27a0ecSDave Kleikamp sb->s_id); 489ac27a0ecSDave Kleikamp } 4904327ba52SDaeho Jeong } 491ac27a0ecSDave Kleikamp 492efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 493efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 494efbed4dcSTheodore Ts'o "EXT4-fs error") 495efbed4dcSTheodore Ts'o 49612062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 497c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 498ac27a0ecSDave Kleikamp { 4990ff2ea7dSJoe Perches struct va_format vaf; 500ac27a0ecSDave Kleikamp va_list args; 501ac27a0ecSDave Kleikamp 5020db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 5030db1ff22STheodore Ts'o return; 5040db1ff22STheodore Ts'o 505ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 506efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 507ac27a0ecSDave Kleikamp va_start(args, fmt); 5080ff2ea7dSJoe Perches vaf.fmt = fmt; 5090ff2ea7dSJoe Perches vaf.va = &args; 510efbed4dcSTheodore Ts'o printk(KERN_CRIT 511efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 5120ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 513ac27a0ecSDave Kleikamp va_end(args); 514efbed4dcSTheodore Ts'o } 515f3fc0210STheodore Ts'o save_error_info(sb, function, line); 516617ba13bSMingming Cao ext4_handle_error(sb); 517ac27a0ecSDave Kleikamp } 518ac27a0ecSDave Kleikamp 519e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 520c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 521273df556SFrank Mayhar const char *fmt, ...) 522273df556SFrank Mayhar { 523273df556SFrank Mayhar va_list args; 524f7c21177STheodore Ts'o struct va_format vaf; 5251c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 526273df556SFrank Mayhar 5270db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 5280db1ff22STheodore Ts'o return; 5290db1ff22STheodore Ts'o 530ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 5311c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 5321c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 533efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 534273df556SFrank Mayhar va_start(args, fmt); 535f7c21177STheodore Ts'o vaf.fmt = fmt; 536f7c21177STheodore Ts'o vaf.va = &args; 537c398eda0STheodore Ts'o if (block) 538d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 539d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 540d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 541d9ee81daSJoe Perches block, current->comm, &vaf); 542d9ee81daSJoe Perches else 543d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 544d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 545d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 546d9ee81daSJoe Perches current->comm, &vaf); 547273df556SFrank Mayhar va_end(args); 548efbed4dcSTheodore Ts'o } 549efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 550273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 551273df556SFrank Mayhar } 552273df556SFrank Mayhar 553e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 554f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 555f7c21177STheodore Ts'o const char *fmt, ...) 556273df556SFrank Mayhar { 557273df556SFrank Mayhar va_list args; 558f7c21177STheodore Ts'o struct va_format vaf; 5591c13d5c0STheodore Ts'o struct ext4_super_block *es; 560496ad9aaSAl Viro struct inode *inode = file_inode(file); 561273df556SFrank Mayhar char pathname[80], *path; 562273df556SFrank Mayhar 5630db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 5640db1ff22STheodore Ts'o return; 5650db1ff22STheodore Ts'o 566ccf0f32aSTheodore Ts'o trace_ext4_error(inode->i_sb, function, line); 5671c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5681c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 569efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 5709bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 571f9a62d09SDan Carpenter if (IS_ERR(path)) 572273df556SFrank Mayhar path = "(unknown)"; 573f7c21177STheodore Ts'o va_start(args, fmt); 574f7c21177STheodore Ts'o vaf.fmt = fmt; 575f7c21177STheodore Ts'o vaf.va = &args; 576d9ee81daSJoe Perches if (block) 577d9ee81daSJoe Perches printk(KERN_CRIT 578d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 579d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 580d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 581d9ee81daSJoe Perches block, current->comm, path, &vaf); 582d9ee81daSJoe Perches else 583d9ee81daSJoe Perches printk(KERN_CRIT 584d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 585d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 586d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 587d9ee81daSJoe Perches current->comm, path, &vaf); 588273df556SFrank Mayhar va_end(args); 589efbed4dcSTheodore Ts'o } 590efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 591273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 592273df556SFrank Mayhar } 593273df556SFrank Mayhar 594722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 595ac27a0ecSDave Kleikamp char nbuf[16]) 596ac27a0ecSDave Kleikamp { 597ac27a0ecSDave Kleikamp char *errstr = NULL; 598ac27a0ecSDave Kleikamp 599ac27a0ecSDave Kleikamp switch (errno) { 6006a797d27SDarrick J. Wong case -EFSCORRUPTED: 6016a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 6026a797d27SDarrick J. Wong break; 6036a797d27SDarrick J. Wong case -EFSBADCRC: 6046a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 6056a797d27SDarrick J. Wong break; 606ac27a0ecSDave Kleikamp case -EIO: 607ac27a0ecSDave Kleikamp errstr = "IO failure"; 608ac27a0ecSDave Kleikamp break; 609ac27a0ecSDave Kleikamp case -ENOMEM: 610ac27a0ecSDave Kleikamp errstr = "Out of memory"; 611ac27a0ecSDave Kleikamp break; 612ac27a0ecSDave Kleikamp case -EROFS: 61378f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 61478f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 615ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 616ac27a0ecSDave Kleikamp else 617ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 618ac27a0ecSDave Kleikamp break; 619ac27a0ecSDave Kleikamp default: 620ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 621ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 622ac27a0ecSDave Kleikamp * NULL. */ 623ac27a0ecSDave Kleikamp if (nbuf) { 624ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 625ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 626ac27a0ecSDave Kleikamp errstr = nbuf; 627ac27a0ecSDave Kleikamp } 628ac27a0ecSDave Kleikamp break; 629ac27a0ecSDave Kleikamp } 630ac27a0ecSDave Kleikamp 631ac27a0ecSDave Kleikamp return errstr; 632ac27a0ecSDave Kleikamp } 633ac27a0ecSDave Kleikamp 634617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 635ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 636ac27a0ecSDave Kleikamp 637c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 638c398eda0STheodore Ts'o unsigned int line, int errno) 639ac27a0ecSDave Kleikamp { 640ac27a0ecSDave Kleikamp char nbuf[16]; 641ac27a0ecSDave Kleikamp const char *errstr; 642ac27a0ecSDave Kleikamp 6430db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 6440db1ff22STheodore Ts'o return; 6450db1ff22STheodore Ts'o 646ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 647ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 648ac27a0ecSDave Kleikamp * an error. */ 649bc98a42cSDavid Howells if (errno == -EROFS && journal_current_handle() == NULL && sb_rdonly(sb)) 650ac27a0ecSDave Kleikamp return; 651ac27a0ecSDave Kleikamp 652efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 653617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 654c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 655c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 656efbed4dcSTheodore Ts'o } 657ac27a0ecSDave Kleikamp 658efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 659617ba13bSMingming Cao ext4_handle_error(sb); 660ac27a0ecSDave Kleikamp } 661ac27a0ecSDave Kleikamp 662ac27a0ecSDave Kleikamp /* 663617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 664ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 665ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 666ac27a0ecSDave Kleikamp * 667ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 668ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 669ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 670ac27a0ecSDave Kleikamp */ 671ac27a0ecSDave Kleikamp 672c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 673c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 674ac27a0ecSDave Kleikamp { 675651e1c3bSJoe Perches struct va_format vaf; 676ac27a0ecSDave Kleikamp va_list args; 677ac27a0ecSDave Kleikamp 6780db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 6790db1ff22STheodore Ts'o return; 6800db1ff22STheodore Ts'o 6811c13d5c0STheodore Ts'o save_error_info(sb, function, line); 682ac27a0ecSDave Kleikamp va_start(args, fmt); 683651e1c3bSJoe Perches vaf.fmt = fmt; 684651e1c3bSJoe Perches vaf.va = &args; 685651e1c3bSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", 686651e1c3bSJoe Perches sb->s_id, function, line, &vaf); 687ac27a0ecSDave Kleikamp va_end(args); 688ac27a0ecSDave Kleikamp 689bc98a42cSDavid Howells if (sb_rdonly(sb) == 0) { 690b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 6914ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 6924418e141SDmitry Monakhov /* 6934418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 6944418e141SDmitry Monakhov * before ->s_flags update 6954418e141SDmitry Monakhov */ 6964418e141SDmitry Monakhov smp_wmb(); 6971751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 698ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 699dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 7001c13d5c0STheodore Ts'o save_error_info(sb, function, line); 7011c13d5c0STheodore Ts'o } 7022c1d0e36SJan Kara if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) { 7034327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 7044327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 7054327ba52SDaeho Jeong return; 7061c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 707ac27a0ecSDave Kleikamp } 7084327ba52SDaeho Jeong } 709ac27a0ecSDave Kleikamp 710e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 711e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 712b31e1552SEric Sandeen { 7130ff2ea7dSJoe Perches struct va_format vaf; 714b31e1552SEric Sandeen va_list args; 715b31e1552SEric Sandeen 716efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 717efbed4dcSTheodore Ts'o return; 718efbed4dcSTheodore Ts'o 719b31e1552SEric Sandeen va_start(args, fmt); 7200ff2ea7dSJoe Perches vaf.fmt = fmt; 7210ff2ea7dSJoe Perches vaf.va = &args; 7220ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 723b31e1552SEric Sandeen va_end(args); 724b31e1552SEric Sandeen } 725b31e1552SEric Sandeen 726b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 727b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 728b03a2f7eSAndreas Dilger "EXT4-fs warning") 729b03a2f7eSAndreas Dilger 73012062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 731c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 732ac27a0ecSDave Kleikamp { 7330ff2ea7dSJoe Perches struct va_format vaf; 734ac27a0ecSDave Kleikamp va_list args; 735ac27a0ecSDave Kleikamp 736b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 737efbed4dcSTheodore Ts'o return; 738efbed4dcSTheodore Ts'o 739ac27a0ecSDave Kleikamp va_start(args, fmt); 7400ff2ea7dSJoe Perches vaf.fmt = fmt; 7410ff2ea7dSJoe Perches vaf.va = &args; 7420ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 7430ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 744ac27a0ecSDave Kleikamp va_end(args); 745ac27a0ecSDave Kleikamp } 746ac27a0ecSDave Kleikamp 747b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 748b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 749b03a2f7eSAndreas Dilger { 750b03a2f7eSAndreas Dilger struct va_format vaf; 751b03a2f7eSAndreas Dilger va_list args; 752b03a2f7eSAndreas Dilger 753b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 754b03a2f7eSAndreas Dilger return; 755b03a2f7eSAndreas Dilger 756b03a2f7eSAndreas Dilger va_start(args, fmt); 757b03a2f7eSAndreas Dilger vaf.fmt = fmt; 758b03a2f7eSAndreas Dilger vaf.va = &args; 759b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 760b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 761b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 762b03a2f7eSAndreas Dilger va_end(args); 763b03a2f7eSAndreas Dilger } 764b03a2f7eSAndreas Dilger 765e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 766e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 767e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 768e29136f8STheodore Ts'o const char *fmt, ...) 7695d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7705d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7715d1b1b3fSAneesh Kumar K.V { 7720ff2ea7dSJoe Perches struct va_format vaf; 7735d1b1b3fSAneesh Kumar K.V va_list args; 7745d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7755d1b1b3fSAneesh Kumar K.V 7760db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7770db1ff22STheodore Ts'o return; 7780db1ff22STheodore Ts'o 779ccf0f32aSTheodore Ts'o trace_ext4_error(sb, function, line); 7801c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7811c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7821c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7830ff2ea7dSJoe Perches 784efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 7855d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7860ff2ea7dSJoe Perches vaf.fmt = fmt; 7870ff2ea7dSJoe Perches vaf.va = &args; 78821149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 789e29136f8STheodore Ts'o sb->s_id, function, line, grp); 790e29136f8STheodore Ts'o if (ino) 7910ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 792e29136f8STheodore Ts'o if (block) 793efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 794efbed4dcSTheodore Ts'o (unsigned long long) block); 7950ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7965d1b1b3fSAneesh Kumar K.V va_end(args); 797efbed4dcSTheodore Ts'o } 7985d1b1b3fSAneesh Kumar K.V 799327eaf73STheodore Ts'o if (test_opt(sb, WARN_ON_ERROR)) 800327eaf73STheodore Ts'o WARN_ON_ONCE(1); 801327eaf73STheodore Ts'o 8025d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 803e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 8045d1b1b3fSAneesh Kumar K.V return; 8055d1b1b3fSAneesh Kumar K.V } 8061c13d5c0STheodore Ts'o 8075d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 80806f29cc8SZhouyi Zhou ext4_commit_super(sb, 1); 8095d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 8105d1b1b3fSAneesh Kumar K.V /* 8115d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 8125d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 8135d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 8145d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 8155d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 81625985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 8175d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 8185d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 8195d1b1b3fSAneesh Kumar K.V * more appropriate error code. 8205d1b1b3fSAneesh Kumar K.V */ 8215d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 8225d1b1b3fSAneesh Kumar K.V return; 8235d1b1b3fSAneesh Kumar K.V } 8245d1b1b3fSAneesh Kumar K.V 825db79e6d1SWang Shilong void ext4_mark_group_bitmap_corrupted(struct super_block *sb, 826db79e6d1SWang Shilong ext4_group_t group, 827db79e6d1SWang Shilong unsigned int flags) 828db79e6d1SWang Shilong { 829db79e6d1SWang Shilong struct ext4_sb_info *sbi = EXT4_SB(sb); 830db79e6d1SWang Shilong struct ext4_group_info *grp = ext4_get_group_info(sb, group); 831db79e6d1SWang Shilong struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL); 8329af0b3d1SWang Shilong int ret; 833db79e6d1SWang Shilong 8349af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_BBITMAP_CORRUPT) { 8359af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT, 8369af0b3d1SWang Shilong &grp->bb_state); 8379af0b3d1SWang Shilong if (!ret) 838db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeclusters_counter, 839db79e6d1SWang Shilong grp->bb_free); 840db79e6d1SWang Shilong } 841db79e6d1SWang Shilong 8429af0b3d1SWang Shilong if (flags & EXT4_GROUP_INFO_IBITMAP_CORRUPT) { 8439af0b3d1SWang Shilong ret = ext4_test_and_set_bit(EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT, 8449af0b3d1SWang Shilong &grp->bb_state); 8459af0b3d1SWang Shilong if (!ret && gdp) { 846db79e6d1SWang Shilong int count; 847db79e6d1SWang Shilong 848db79e6d1SWang Shilong count = ext4_free_inodes_count(sb, gdp); 849db79e6d1SWang Shilong percpu_counter_sub(&sbi->s_freeinodes_counter, 850db79e6d1SWang Shilong count); 851db79e6d1SWang Shilong } 852db79e6d1SWang Shilong } 853db79e6d1SWang Shilong } 854db79e6d1SWang Shilong 855617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 856ac27a0ecSDave Kleikamp { 857617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 858ac27a0ecSDave Kleikamp 859617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 860ac27a0ecSDave Kleikamp return; 861ac27a0ecSDave Kleikamp 86212062dddSEric Sandeen ext4_warning(sb, 863ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 864ac27a0ecSDave Kleikamp "running e2fsck is recommended", 865617ba13bSMingming Cao EXT4_DYNAMIC_REV); 866ac27a0ecSDave Kleikamp 867617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 868617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 869617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 870ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 871ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 872ac27a0ecSDave Kleikamp 873ac27a0ecSDave Kleikamp /* 874ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 875ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 876ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 877ac27a0ecSDave Kleikamp */ 878ac27a0ecSDave Kleikamp } 879ac27a0ecSDave Kleikamp 880ac27a0ecSDave Kleikamp /* 881ac27a0ecSDave Kleikamp * Open the external journal device 882ac27a0ecSDave Kleikamp */ 883b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 884ac27a0ecSDave Kleikamp { 885ac27a0ecSDave Kleikamp struct block_device *bdev; 886ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 887ac27a0ecSDave Kleikamp 888d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 889ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 890ac27a0ecSDave Kleikamp goto fail; 891ac27a0ecSDave Kleikamp return bdev; 892ac27a0ecSDave Kleikamp 893ac27a0ecSDave Kleikamp fail: 894b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 895ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 896ac27a0ecSDave Kleikamp return NULL; 897ac27a0ecSDave Kleikamp } 898ac27a0ecSDave Kleikamp 899ac27a0ecSDave Kleikamp /* 900ac27a0ecSDave Kleikamp * Release the journal device 901ac27a0ecSDave Kleikamp */ 9024385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 903ac27a0ecSDave Kleikamp { 9044385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 905ac27a0ecSDave Kleikamp } 906ac27a0ecSDave Kleikamp 9074385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 908ac27a0ecSDave Kleikamp { 909ac27a0ecSDave Kleikamp struct block_device *bdev; 910ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 911ac27a0ecSDave Kleikamp if (bdev) { 9124385bab1SAl Viro ext4_blkdev_put(bdev); 913ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 914ac27a0ecSDave Kleikamp } 915ac27a0ecSDave Kleikamp } 916ac27a0ecSDave Kleikamp 917ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 918ac27a0ecSDave Kleikamp { 919617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 920ac27a0ecSDave Kleikamp } 921ac27a0ecSDave Kleikamp 922617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 923ac27a0ecSDave Kleikamp { 924ac27a0ecSDave Kleikamp struct list_head *l; 925ac27a0ecSDave Kleikamp 926b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 927ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 928ac27a0ecSDave Kleikamp 929ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 930ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 931ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 932ac27a0ecSDave Kleikamp printk(KERN_ERR " " 933ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 934ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 935ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 936ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 937ac27a0ecSDave Kleikamp } 938ac27a0ecSDave Kleikamp } 939ac27a0ecSDave Kleikamp 940957153fcSJan Kara #ifdef CONFIG_QUOTA 941957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 942957153fcSJan Kara 943957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 944957153fcSJan Kara { 945957153fcSJan Kara int type; 946957153fcSJan Kara 947957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 948957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 949957153fcSJan Kara ext4_quota_off(sb, type); 950957153fcSJan Kara } 95133458eabSTheodore Ts'o 95233458eabSTheodore Ts'o /* 95333458eabSTheodore Ts'o * This is a helper function which is used in the mount/remount 95433458eabSTheodore Ts'o * codepaths (which holds s_umount) to fetch the quota file name. 95533458eabSTheodore Ts'o */ 95633458eabSTheodore Ts'o static inline char *get_qf_name(struct super_block *sb, 95733458eabSTheodore Ts'o struct ext4_sb_info *sbi, 95833458eabSTheodore Ts'o int type) 95933458eabSTheodore Ts'o { 96033458eabSTheodore Ts'o return rcu_dereference_protected(sbi->s_qf_names[type], 96133458eabSTheodore Ts'o lockdep_is_held(&sb->s_umount)); 96233458eabSTheodore Ts'o } 963957153fcSJan Kara #else 964957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 965957153fcSJan Kara { 966957153fcSJan Kara } 967957153fcSJan Kara #endif 968957153fcSJan Kara 969617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 970ac27a0ecSDave Kleikamp { 971617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 972617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 97397abd7d4STheodore Ts'o int aborted = 0; 974ef2cabf7SHidehiro Kawai int i, err; 975ac27a0ecSDave Kleikamp 976857ac889SLukas Czerner ext4_unregister_li_request(sb); 977957153fcSJan Kara ext4_quota_off_umount(sb); 978e0ccfd95SChristoph Hellwig 9792e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 9804c0425ffSMingming Cao 9810390131bSFrank Mayhar if (sbi->s_journal) { 98297abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 983ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 98447b4a50bSJan Kara sbi->s_journal = NULL; 98597abd7d4STheodore Ts'o if ((err < 0) && !aborted) 986c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 9870390131bSFrank Mayhar } 988d4edac31SJosef Bacik 989ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 990d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 9919105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 992d4edac31SJosef Bacik ext4_release_system_zone(sb); 993d4edac31SJosef Bacik ext4_mb_release(sb); 994d4edac31SJosef Bacik ext4_ext_release(sb); 995d4edac31SJosef Bacik 996bc98a42cSDavid Howells if (!sb_rdonly(sb) && !aborted) { 997e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 998ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 999ac27a0ecSDave Kleikamp } 1000bc98a42cSDavid Howells if (!sb_rdonly(sb)) 1001a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 1002a8e25a83SArtem Bityutskiy 1003ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 1004ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 1005b93b41d4SAl Viro kvfree(sbi->s_group_desc); 1006b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 100757042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 1008ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1009ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 101057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 1011c8585c6fSDaeho Jeong percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 1012ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1013a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 101433458eabSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 1015ac27a0ecSDave Kleikamp #endif 1016ac27a0ecSDave Kleikamp 1017ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 1018ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 1019ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 1020ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 1021ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 1022ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 1023ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 1024ac27a0ecSDave Kleikamp 102589d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 1026f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 1027ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 1028ac27a0ecSDave Kleikamp /* 1029ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 1030ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 1031ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 1032ac27a0ecSDave Kleikamp */ 1033ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 1034f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 1035617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1036ac27a0ecSDave Kleikamp } 103750c15df6SChengguang Xu 1038dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 1039dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 104050c15df6SChengguang Xu 104147387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 104247387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 104350c15df6SChengguang Xu 1044c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 1045c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 10469060dd2cSEric Sandeen brelse(sbi->s_sbh); 1047ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 10483197ebdbSTheodore Ts'o /* 10493197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 10503197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 10513197ebdbSTheodore Ts'o */ 10523197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 10533197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 10540441984aSDarrick J. Wong if (sbi->s_chksum_driver) 10550441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 1056705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 10575e405595SDan Williams fs_put_dax(sbi->s_daxdev); 1058c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1059c83ad55eSGabriel Krisman Bertazi utf8_unload(sbi->s_encoding); 1060c83ad55eSGabriel Krisman Bertazi #endif 1061ac27a0ecSDave Kleikamp kfree(sbi); 1062ac27a0ecSDave Kleikamp } 1063ac27a0ecSDave Kleikamp 1064e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 1065ac27a0ecSDave Kleikamp 1066ac27a0ecSDave Kleikamp /* 1067ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 1068ac27a0ecSDave Kleikamp */ 1069617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 1070ac27a0ecSDave Kleikamp { 1071617ba13bSMingming Cao struct ext4_inode_info *ei; 1072ac27a0ecSDave Kleikamp 1073e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 1074ac27a0ecSDave Kleikamp if (!ei) 1075ac27a0ecSDave Kleikamp return NULL; 10760b8e58a1SAndreas Dilger 1077ee73f9a5SJeff Layton inode_set_iversion(&ei->vfs_inode, 1); 1078202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 1079c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 1080c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 10819a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 10829a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 1083edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 1084eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 1085edaa53caSZheng Liu ei->i_es_shk_nr = 0; 1086dd475925SJan Kara ei->i_es_shrink_lblk = 0; 1087d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 10889d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 10897e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 1090d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 10911dc0aa46SEric Whitney ext4_init_pending_tree(&ei->i_pending_tree); 1092a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 1093a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 109496c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 1095a9e7f447SDmitry Monakhov #endif 10968aefcd55STheodore Ts'o ei->jinode = NULL; 10972e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 1098744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 1099b436b9beSJan Kara ei->i_sync_tid = 0; 1100b436b9beSJan Kara ei->i_datasync_tid = 0; 1101e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 11022e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 1103ac27a0ecSDave Kleikamp return &ei->vfs_inode; 1104ac27a0ecSDave Kleikamp } 1105ac27a0ecSDave Kleikamp 11067ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 11077ff9c073STheodore Ts'o { 11087ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 11097ff9c073STheodore Ts'o 111029b3692eSEric Biggers if (!drop) 111129b3692eSEric Biggers drop = fscrypt_drop_inode(inode); 111229b3692eSEric Biggers 11137ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 11147ff9c073STheodore Ts'o return drop; 11157ff9c073STheodore Ts'o } 11167ff9c073STheodore Ts'o 111794053139SAl Viro static void ext4_free_in_core_inode(struct inode *inode) 1118fa0d7e3dSNick Piggin { 11192c58d548SEric Biggers fscrypt_free_inode(inode); 1120fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1121fa0d7e3dSNick Piggin } 1122fa0d7e3dSNick Piggin 1123617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1124ac27a0ecSDave Kleikamp { 11259f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1126b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1127b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1128b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 11299f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 11309f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 11319f7dd93dSVasily Averin true); 11329f7dd93dSVasily Averin dump_stack(); 11339f7dd93dSVasily Averin } 1134ac27a0ecSDave Kleikamp } 1135ac27a0ecSDave Kleikamp 113651cc5068SAlexey Dobriyan static void init_once(void *foo) 1137ac27a0ecSDave Kleikamp { 1138617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1139ac27a0ecSDave Kleikamp 1140ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1141ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 11420e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1143ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1144ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1145ac27a0ecSDave Kleikamp } 1146ac27a0ecSDave Kleikamp 1147e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1148ac27a0ecSDave Kleikamp { 1149f8dd7c70SDavid Windsor ext4_inode_cachep = kmem_cache_create_usercopy("ext4_inode_cache", 1150f8dd7c70SDavid Windsor sizeof(struct ext4_inode_info), 0, 1151f8dd7c70SDavid Windsor (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| 1152f8dd7c70SDavid Windsor SLAB_ACCOUNT), 1153f8dd7c70SDavid Windsor offsetof(struct ext4_inode_info, i_data), 1154f8dd7c70SDavid Windsor sizeof_field(struct ext4_inode_info, i_data), 115520c2df83SPaul Mundt init_once); 1156617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1157ac27a0ecSDave Kleikamp return -ENOMEM; 1158ac27a0ecSDave Kleikamp return 0; 1159ac27a0ecSDave Kleikamp } 1160ac27a0ecSDave Kleikamp 1161ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1162ac27a0ecSDave Kleikamp { 11638c0a8537SKirill A. Shutemov /* 11648c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 11658c0a8537SKirill A. Shutemov * destroy cache. 11668c0a8537SKirill A. Shutemov */ 11678c0a8537SKirill A. Shutemov rcu_barrier(); 1168617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1169ac27a0ecSDave Kleikamp } 1170ac27a0ecSDave Kleikamp 11710930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1172ac27a0ecSDave Kleikamp { 11730930fcc1SAl Viro invalidate_inode_buffers(inode); 1174dbd5768fSJan Kara clear_inode(inode); 1175c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 117651865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 1177f4c2d372SJan Kara dquot_drop(inode); 11788aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 11798aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 11808aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 11818aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 11828aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 11838aefcd55STheodore Ts'o } 11843d204e24SEric Biggers fscrypt_put_encryption_info(inode); 1185c93d8f88SEric Biggers fsverity_cleanup_inode(inode); 1186ac27a0ecSDave Kleikamp } 1187ac27a0ecSDave Kleikamp 11881b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 11891b961ac0SChristoph Hellwig u64 ino, u32 generation) 1190ac27a0ecSDave Kleikamp { 1191ac27a0ecSDave Kleikamp struct inode *inode; 1192ac27a0ecSDave Kleikamp 11938a363970STheodore Ts'o /* 1194ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1195ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1196ac27a0ecSDave Kleikamp */ 11978a363970STheodore Ts'o inode = ext4_iget(sb, ino, EXT4_IGET_HANDLE); 11981d1fe1eeSDavid Howells if (IS_ERR(inode)) 11991d1fe1eeSDavid Howells return ERR_CAST(inode); 12001d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1201ac27a0ecSDave Kleikamp iput(inode); 1202ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1203ac27a0ecSDave Kleikamp } 12041b961ac0SChristoph Hellwig 12051b961ac0SChristoph Hellwig return inode; 1206ac27a0ecSDave Kleikamp } 12071b961ac0SChristoph Hellwig 12081b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 12091b961ac0SChristoph Hellwig int fh_len, int fh_type) 12101b961ac0SChristoph Hellwig { 12111b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 12121b961ac0SChristoph Hellwig ext4_nfs_get_inode); 12131b961ac0SChristoph Hellwig } 12141b961ac0SChristoph Hellwig 12151b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 12161b961ac0SChristoph Hellwig int fh_len, int fh_type) 12171b961ac0SChristoph Hellwig { 12181b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 12191b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1220ac27a0ecSDave Kleikamp } 1221ac27a0ecSDave Kleikamp 1222fde87268STheodore Ts'o static int ext4_nfs_commit_metadata(struct inode *inode) 1223fde87268STheodore Ts'o { 1224fde87268STheodore Ts'o struct writeback_control wbc = { 1225fde87268STheodore Ts'o .sync_mode = WB_SYNC_ALL 1226fde87268STheodore Ts'o }; 1227fde87268STheodore Ts'o 1228fde87268STheodore Ts'o trace_ext4_nfs_commit_metadata(inode); 1229fde87268STheodore Ts'o return ext4_write_inode(inode, &wbc); 1230fde87268STheodore Ts'o } 1231fde87268STheodore Ts'o 1232c39a7f84SToshiyuki Okajima /* 1233c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1234c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1235c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1236c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1237c39a7f84SToshiyuki Okajima */ 12380b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 12390b8e58a1SAndreas Dilger gfp_t wait) 1240c39a7f84SToshiyuki Okajima { 1241c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1242c39a7f84SToshiyuki Okajima 1243c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1244c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1245c39a7f84SToshiyuki Okajima return 0; 1246c39a7f84SToshiyuki Okajima if (journal) 1247c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1248d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1249c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1250c39a7f84SToshiyuki Okajima } 1251c39a7f84SToshiyuki Okajima 1252643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 1253a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1254a7550b30SJaegeuk Kim { 1255a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1256a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1257a7550b30SJaegeuk Kim } 1258a7550b30SJaegeuk Kim 1259a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1260a7550b30SJaegeuk Kim void *fs_data) 1261a7550b30SJaegeuk Kim { 12622f8f5e76SEric Biggers handle_t *handle = fs_data; 1263c1a5d5f6STahsin Erdogan int res, res2, credits, retries = 0; 1264a7550b30SJaegeuk Kim 12659ce0151aSEric Biggers /* 12669ce0151aSEric Biggers * Encrypting the root directory is not allowed because e2fsck expects 12679ce0151aSEric Biggers * lost+found to exist and be unencrypted, and encrypting the root 12689ce0151aSEric Biggers * directory would imply encrypting the lost+found directory as well as 12699ce0151aSEric Biggers * the filename "lost+found" itself. 12709ce0151aSEric Biggers */ 12719ce0151aSEric Biggers if (inode->i_ino == EXT4_ROOT_INO) 12729ce0151aSEric Biggers return -EPERM; 1273a7550b30SJaegeuk Kim 12747d3e06a8SRoss Zwisler if (WARN_ON_ONCE(IS_DAX(inode) && i_size_read(inode))) 12757d3e06a8SRoss Zwisler return -EINVAL; 12767d3e06a8SRoss Zwisler 127794840e3cSEric Biggers res = ext4_convert_inline_data(inode); 127894840e3cSEric Biggers if (res) 127994840e3cSEric Biggers return res; 128094840e3cSEric Biggers 12812f8f5e76SEric Biggers /* 12822f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 12832f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 12842f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 12852f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 12862f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 12872f8f5e76SEric Biggers */ 12882f8f5e76SEric Biggers 12892f8f5e76SEric Biggers if (handle) { 12902f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 12912f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 12922f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 12932f8f5e76SEric Biggers ctx, len, 0); 1294a7550b30SJaegeuk Kim if (!res) { 1295a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1296a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1297a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1298a3caa24bSJan Kara /* 12992ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 13002ee6a576SEric Biggers * S_DAX may be disabled 1301a3caa24bSJan Kara */ 1302a3caa24bSJan Kara ext4_set_inode_flags(inode); 1303a7550b30SJaegeuk Kim } 1304a7550b30SJaegeuk Kim return res; 1305a7550b30SJaegeuk Kim } 1306a7550b30SJaegeuk Kim 1307b8cb5a54STahsin Erdogan res = dquot_initialize(inode); 1308b8cb5a54STahsin Erdogan if (res) 1309b8cb5a54STahsin Erdogan return res; 13102f8f5e76SEric Biggers retry: 1311af65207cSTahsin Erdogan res = ext4_xattr_set_credits(inode, len, false /* is_create */, 1312af65207cSTahsin Erdogan &credits); 1313dec214d0STahsin Erdogan if (res) 1314dec214d0STahsin Erdogan return res; 1315dec214d0STahsin Erdogan 1316c1a5d5f6STahsin Erdogan handle = ext4_journal_start(inode, EXT4_HT_MISC, credits); 1317a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1318a7550b30SJaegeuk Kim return PTR_ERR(handle); 1319a7550b30SJaegeuk Kim 13202f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 13212f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 13222f8f5e76SEric Biggers ctx, len, 0); 1323a7550b30SJaegeuk Kim if (!res) { 1324a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 13252ee6a576SEric Biggers /* 13262ee6a576SEric Biggers * Update inode->i_flags - S_ENCRYPTED will be enabled, 13272ee6a576SEric Biggers * S_DAX may be disabled 13282ee6a576SEric Biggers */ 1329a3caa24bSJan Kara ext4_set_inode_flags(inode); 1330a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1331a7550b30SJaegeuk Kim if (res) 1332a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1333a7550b30SJaegeuk Kim } 1334a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 13352f8f5e76SEric Biggers 13362f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 13372f8f5e76SEric Biggers goto retry; 1338a7550b30SJaegeuk Kim if (!res) 1339a7550b30SJaegeuk Kim res = res2; 1340a7550b30SJaegeuk Kim return res; 1341a7550b30SJaegeuk Kim } 1342a7550b30SJaegeuk Kim 1343c250b7ddSEric Biggers static bool ext4_dummy_context(struct inode *inode) 1344a7550b30SJaegeuk Kim { 1345a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1346a7550b30SJaegeuk Kim } 1347a7550b30SJaegeuk Kim 1348b925acb8SEric Biggers static bool ext4_has_stable_inodes(struct super_block *sb) 1349b925acb8SEric Biggers { 1350b925acb8SEric Biggers return ext4_has_feature_stable_inodes(sb); 1351b925acb8SEric Biggers } 1352b925acb8SEric Biggers 1353b925acb8SEric Biggers static void ext4_get_ino_and_lblk_bits(struct super_block *sb, 1354b925acb8SEric Biggers int *ino_bits_ret, int *lblk_bits_ret) 1355b925acb8SEric Biggers { 1356b925acb8SEric Biggers *ino_bits_ret = 8 * sizeof(EXT4_SB(sb)->s_es->s_inodes_count); 1357b925acb8SEric Biggers *lblk_bits_ret = 8 * sizeof(ext4_lblk_t); 1358b925acb8SEric Biggers } 1359b925acb8SEric Biggers 13606f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1361a5d431efSEric Biggers .key_prefix = "ext4:", 1362a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1363a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1364a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1365a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1366e12ee683SEric Biggers .max_namelen = EXT4_NAME_LEN, 1367b925acb8SEric Biggers .has_stable_inodes = ext4_has_stable_inodes, 1368b925acb8SEric Biggers .get_ino_and_lblk_bits = ext4_get_ino_and_lblk_bits, 1369a7550b30SJaegeuk Kim }; 1370a7550b30SJaegeuk Kim #endif 1371a7550b30SJaegeuk Kim 1372ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1373d6006186SEric Biggers static const char * const quotatypes[] = INITQFNAMES; 1374689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1375ac27a0ecSDave Kleikamp 1376617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1377617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1378617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1379617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1380617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 13816f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 13828c54ca9cSAl Viro const struct path *path); 1383617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1384617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1385ac27a0ecSDave Kleikamp size_t len, loff_t off); 1386617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1387ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 13887c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 13897c319d32SAditya Kali unsigned int flags); 13907c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1391ac27a0ecSDave Kleikamp 139296c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 139396c7e0d9SJan Kara { 139496c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 139596c7e0d9SJan Kara } 139696c7e0d9SJan Kara 139761e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 139860e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1399617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1400617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1401617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1402617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1403a5b5ee32SJan Kara .write_info = ext4_write_info, 1404a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1405a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1406040cb378SLi Xi .get_projid = ext4_get_projid, 14077a9ca53aSTahsin Erdogan .get_inode_usage = ext4_get_inode_usage, 1408ebc11f7bSChengguang Xu .get_next_id = dquot_get_next_id, 1409ac27a0ecSDave Kleikamp }; 1410ac27a0ecSDave Kleikamp 14110d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1412617ba13bSMingming Cao .quota_on = ext4_quota_on, 1413ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1414287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 14150a240339SJan Kara .get_state = dquot_get_state, 1416287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1417287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 14186332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 14196332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1420ac27a0ecSDave Kleikamp }; 1421ac27a0ecSDave Kleikamp #endif 1422ac27a0ecSDave Kleikamp 1423ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1424617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 142594053139SAl Viro .free_inode = ext4_free_in_core_inode, 1426617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1427617ba13bSMingming Cao .write_inode = ext4_write_inode, 1428617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 14297ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 14300930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1431617ba13bSMingming Cao .put_super = ext4_put_super, 1432617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1433c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1434c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1435617ba13bSMingming Cao .statfs = ext4_statfs, 1436617ba13bSMingming Cao .remount_fs = ext4_remount, 1437617ba13bSMingming Cao .show_options = ext4_show_options, 1438ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1439617ba13bSMingming Cao .quota_read = ext4_quota_read, 1440617ba13bSMingming Cao .quota_write = ext4_quota_write, 144196c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1442ac27a0ecSDave Kleikamp #endif 1443c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1444ac27a0ecSDave Kleikamp }; 1445ac27a0ecSDave Kleikamp 144639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 14471b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 14481b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1449617ba13bSMingming Cao .get_parent = ext4_get_parent, 1450fde87268STheodore Ts'o .commit_metadata = ext4_nfs_commit_metadata, 1451ac27a0ecSDave Kleikamp }; 1452ac27a0ecSDave Kleikamp 1453ac27a0ecSDave Kleikamp enum { 1454ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1455ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 145672578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1457ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 145872578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1459ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1460ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1461ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 14626ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1463ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 14645a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1465ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 146649da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 1467327eaf73STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_warn_on_error, 1468327eaf73STheodore Ts'o Opt_nowarn_on_error, Opt_mblk_io_submit, 1469670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 14701449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 14715328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1472744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1473fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1474cdb7ee4cSTahsin Erdogan Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, 1475ac27a0ecSDave Kleikamp }; 1476ac27a0ecSDave Kleikamp 1477a447c093SSteven Whitehouse static const match_table_t tokens = { 1478ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1479ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1480ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1481ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1482ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1483ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1484ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1485ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1486ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1487ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1488ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1489ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1490ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1491ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 149272578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 149372578c33STheodore Ts'o {Opt_removed, "orlov"}, 1494ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1495ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1496ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1497ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1498e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 14995a916be1STheodore Ts'o {Opt_noload, "noload"}, 150072578c33STheodore Ts'o {Opt_removed, "nobh"}, 150172578c33STheodore Ts'o {Opt_removed, "bh"}, 1502ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 150330773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 150430773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1505ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1506ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1507818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1508c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1509818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1510ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1511ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1512ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1513ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 15145bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 15155bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1516ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1517ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1518ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1519ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1520ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1521ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 15225a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1523ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1524ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1525ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1526ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 152749da9392SJan Kara {Opt_prjquota, "prjquota"}, 1528ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 152906705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 153006705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 153125ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1532923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1533c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 153464769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1535327eaf73STheodore Ts'o {Opt_warn_on_error, "warn_on_error"}, 1536327eaf73STheodore Ts'o {Opt_nowarn_on_error, "nowarn_on_error"}, 1537a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1538a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1539670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1540dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 154136ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 154236ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 15436fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 15446fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1545240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1546b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1547afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 154806705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 154906705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1550744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1551744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 15525328e635SEric Sandeen {Opt_discard, "discard"}, 15535328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1554fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1555fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1556fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1557df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 15586ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1559cdb7ee4cSTahsin Erdogan {Opt_nombcache, "nombcache"}, 1560cdb7ee4cSTahsin Erdogan {Opt_nombcache, "no_mbcache"}, /* for backward compatibility */ 1561c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1562c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1563c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1564c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1565c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1566f3f12faaSJosef Bacik {Opt_err, NULL}, 1567ac27a0ecSDave Kleikamp }; 1568ac27a0ecSDave Kleikamp 1569617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1570ac27a0ecSDave Kleikamp { 1571617ba13bSMingming Cao ext4_fsblk_t sb_block; 1572ac27a0ecSDave Kleikamp char *options = (char *) *data; 1573ac27a0ecSDave Kleikamp 1574ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1575ac27a0ecSDave Kleikamp return 1; /* Default location */ 15760b8e58a1SAndreas Dilger 1577ac27a0ecSDave Kleikamp options += 3; 15780b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1579ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1580ac27a0ecSDave Kleikamp if (*options && *options != ',') { 15814776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1582ac27a0ecSDave Kleikamp (char *) *data); 1583ac27a0ecSDave Kleikamp return 1; 1584ac27a0ecSDave Kleikamp } 1585ac27a0ecSDave Kleikamp if (*options == ',') 1586ac27a0ecSDave Kleikamp options++; 1587ac27a0ecSDave Kleikamp *data = (void *) options; 15880b8e58a1SAndreas Dilger 1589ac27a0ecSDave Kleikamp return sb_block; 1590ac27a0ecSDave Kleikamp } 1591ac27a0ecSDave Kleikamp 1592b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1593d6006186SEric Biggers static const char deprecated_msg[] = 1594d6006186SEric Biggers "Mount option \"%s\" will be removed by %s\n" 1595437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1596b3881f74STheodore Ts'o 159756c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 159856c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 159956c50f11SDmitry Monakhov { 160056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 160133458eabSTheodore Ts'o char *qname, *old_qname = get_qf_name(sb, sbi, qtype); 160203dafb5fSChen Gang int ret = -1; 160356c50f11SDmitry Monakhov 160433458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && !old_qname) { 160556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 160656c50f11SDmitry Monakhov "Cannot change journaled " 160756c50f11SDmitry Monakhov "quota options when quota turned on"); 160857f73c2cSTheodore Ts'o return -1; 160956c50f11SDmitry Monakhov } 1610e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1611c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1612c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1613c325a67cSTheodore Ts'o return 1; 1614262b4662SJan Kara } 161556c50f11SDmitry Monakhov qname = match_strdup(args); 161656c50f11SDmitry Monakhov if (!qname) { 161756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 161856c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 161957f73c2cSTheodore Ts'o return -1; 162056c50f11SDmitry Monakhov } 162133458eabSTheodore Ts'o if (old_qname) { 162233458eabSTheodore Ts'o if (strcmp(old_qname, qname) == 0) 162303dafb5fSChen Gang ret = 1; 162403dafb5fSChen Gang else 162556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 162603dafb5fSChen Gang "%s quota file already specified", 162703dafb5fSChen Gang QTYPE2NAME(qtype)); 162803dafb5fSChen Gang goto errout; 162956c50f11SDmitry Monakhov } 163003dafb5fSChen Gang if (strchr(qname, '/')) { 163156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 163256c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 163303dafb5fSChen Gang goto errout; 163456c50f11SDmitry Monakhov } 163533458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], qname); 1636fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 163756c50f11SDmitry Monakhov return 1; 163803dafb5fSChen Gang errout: 163903dafb5fSChen Gang kfree(qname); 164003dafb5fSChen Gang return ret; 164156c50f11SDmitry Monakhov } 164256c50f11SDmitry Monakhov 164356c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 164456c50f11SDmitry Monakhov { 164556c50f11SDmitry Monakhov 164656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 164733458eabSTheodore Ts'o char *old_qname = get_qf_name(sb, sbi, qtype); 164856c50f11SDmitry Monakhov 164933458eabSTheodore Ts'o if (sb_any_quota_loaded(sb) && old_qname) { 165056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 165156c50f11SDmitry Monakhov " when quota turned on"); 165257f73c2cSTheodore Ts'o return -1; 165356c50f11SDmitry Monakhov } 165433458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[qtype], NULL); 165533458eabSTheodore Ts'o synchronize_rcu(); 165633458eabSTheodore Ts'o kfree(old_qname); 165756c50f11SDmitry Monakhov return 1; 165856c50f11SDmitry Monakhov } 165956c50f11SDmitry Monakhov #endif 166056c50f11SDmitry Monakhov 166126092bf5STheodore Ts'o #define MOPT_SET 0x0001 166226092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 166326092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 166426092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 166526092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 166626092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 166726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 166826092bf5STheodore Ts'o #define MOPT_Q 0 166926092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 167026092bf5STheodore Ts'o #else 167126092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 167226092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 167326092bf5STheodore Ts'o #endif 167426092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 16758dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 16768dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 16778dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1678ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 167926092bf5STheodore Ts'o 168026092bf5STheodore Ts'o static const struct mount_opts { 168126092bf5STheodore Ts'o int token; 168226092bf5STheodore Ts'o int mount_opt; 168326092bf5STheodore Ts'o int flags; 168426092bf5STheodore Ts'o } ext4_mount_opts[] = { 168526092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 168626092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 168726092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 168826092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 168926092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 169026092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 16918dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 16928dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 16938dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 16948dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 169526092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 169626092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 16978dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 16988dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 16998dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 170059d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1701327eaf73STheodore Ts'o {Opt_warn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_SET}, 1702327eaf73STheodore Ts'o {Opt_nowarn_on_error, EXT4_MOUNT_WARN_ON_ERROR, MOPT_CLEAR}, 1703c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1704c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 17058dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 17061e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 170726092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 17088dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 17091e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 17108dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 171126092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 171226092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 171326092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 17148dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 17157915a861SAles Novak MOPT_NO_EXT2}, 17168dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 17177915a861SAles Novak MOPT_NO_EXT2}, 171826092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 171926092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 172026092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 172126092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 172226092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 172326092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 172426092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 172526092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 172626092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 172726092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1728923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 172926092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 17300efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 17310efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 17325ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 17335ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 17345ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 17358dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 17368dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 17378dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 17388dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 173926092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 174026092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 174126092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 174226092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 174326092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 174426092bf5STheodore Ts'o #else 174526092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 174626092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 174726092bf5STheodore Ts'o #endif 174826092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 174926092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1750670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 175126092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 175226092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 175326092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 175426092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 175526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 175649da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 175749da9392SJan Kara MOPT_SET | MOPT_Q}, 175826092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 175949da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 176049da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 176126092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 176226092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 176326092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 176426092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 176526092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 176626092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 176726092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1768df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 17696ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 1770cdb7ee4cSTahsin Erdogan {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, 177126092bf5STheodore Ts'o {Opt_err, 0, 0} 177226092bf5STheodore Ts'o }; 177326092bf5STheodore Ts'o 1774c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 1775c83ad55eSGabriel Krisman Bertazi static const struct ext4_sb_encodings { 1776c83ad55eSGabriel Krisman Bertazi __u16 magic; 1777c83ad55eSGabriel Krisman Bertazi char *name; 1778c83ad55eSGabriel Krisman Bertazi char *version; 1779c83ad55eSGabriel Krisman Bertazi } ext4_sb_encoding_map[] = { 1780c83ad55eSGabriel Krisman Bertazi {EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"}, 1781c83ad55eSGabriel Krisman Bertazi }; 1782c83ad55eSGabriel Krisman Bertazi 1783c83ad55eSGabriel Krisman Bertazi static int ext4_sb_read_encoding(const struct ext4_super_block *es, 1784c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings **encoding, 1785c83ad55eSGabriel Krisman Bertazi __u16 *flags) 1786c83ad55eSGabriel Krisman Bertazi { 1787c83ad55eSGabriel Krisman Bertazi __u16 magic = le16_to_cpu(es->s_encoding); 1788c83ad55eSGabriel Krisman Bertazi int i; 1789c83ad55eSGabriel Krisman Bertazi 1790c83ad55eSGabriel Krisman Bertazi for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++) 1791c83ad55eSGabriel Krisman Bertazi if (magic == ext4_sb_encoding_map[i].magic) 1792c83ad55eSGabriel Krisman Bertazi break; 1793c83ad55eSGabriel Krisman Bertazi 1794c83ad55eSGabriel Krisman Bertazi if (i >= ARRAY_SIZE(ext4_sb_encoding_map)) 1795c83ad55eSGabriel Krisman Bertazi return -EINVAL; 1796c83ad55eSGabriel Krisman Bertazi 1797c83ad55eSGabriel Krisman Bertazi *encoding = &ext4_sb_encoding_map[i]; 1798c83ad55eSGabriel Krisman Bertazi *flags = le16_to_cpu(es->s_encoding_flags); 1799c83ad55eSGabriel Krisman Bertazi 1800c83ad55eSGabriel Krisman Bertazi return 0; 1801c83ad55eSGabriel Krisman Bertazi } 1802c83ad55eSGabriel Krisman Bertazi #endif 1803c83ad55eSGabriel Krisman Bertazi 180426092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 180526092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 180626092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 180726092bf5STheodore Ts'o { 180826092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 180926092bf5STheodore Ts'o const struct mount_opts *m; 181008cefc7aSEric W. Biederman kuid_t uid; 181108cefc7aSEric W. Biederman kgid_t gid; 181226092bf5STheodore Ts'o int arg = 0; 181326092bf5STheodore Ts'o 181457f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 181557f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 181657f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 181757f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 181857f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 181957f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 182057f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 182157f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 182257f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 182357f73c2cSTheodore Ts'o #endif 182426092bf5STheodore Ts'o switch (token) { 1825f7048605STheodore Ts'o case Opt_noacl: 1826f7048605STheodore Ts'o case Opt_nouser_xattr: 1827f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1828f7048605STheodore Ts'o break; 182926092bf5STheodore Ts'o case Opt_sb: 183026092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 183126092bf5STheodore Ts'o case Opt_removed: 18325f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 183326092bf5STheodore Ts'o return 1; 183426092bf5STheodore Ts'o case Opt_abort: 183526092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 183626092bf5STheodore Ts'o return 1; 183726092bf5STheodore Ts'o case Opt_i_version: 1838357fdad0SMatthew Garrett sb->s_flags |= SB_I_VERSION; 183926092bf5STheodore Ts'o return 1; 1840a26f4992STheodore Ts'o case Opt_lazytime: 18411751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 1842a26f4992STheodore Ts'o return 1; 1843a26f4992STheodore Ts'o case Opt_nolazytime: 18441751e8a6SLinus Torvalds sb->s_flags &= ~SB_LAZYTIME; 1845a26f4992STheodore Ts'o return 1; 184626092bf5STheodore Ts'o } 184726092bf5STheodore Ts'o 18485f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 18495f3633e3SJan Kara if (token == m->token) 18505f3633e3SJan Kara break; 18515f3633e3SJan Kara 18525f3633e3SJan Kara if (m->token == Opt_err) { 18535f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 18545f3633e3SJan Kara "or missing value", opt); 18555f3633e3SJan Kara return -1; 18565f3633e3SJan Kara } 18575f3633e3SJan Kara 18588dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 18598dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 18608dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 18618dc0aa8cSTheodore Ts'o return -1; 18628dc0aa8cSTheodore Ts'o } 18638dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 18648dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 18658dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 18668dc0aa8cSTheodore Ts'o return -1; 18678dc0aa8cSTheodore Ts'o } 18688dc0aa8cSTheodore Ts'o 1869ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 18700efb3b23SJan Kara return -1; 187126092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 187226092bf5STheodore Ts'o return -1; 1873c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1874c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 187526092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 18761e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 18771e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1878c93cf2d7SDmitry Monakhov } else 1879c93cf2d7SDmitry Monakhov return -1; 1880c93cf2d7SDmitry Monakhov } 188126092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 188226092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 188326092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 188426092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 188526092bf5STheodore Ts'o "options when quota turned on"); 188626092bf5STheodore Ts'o return -1; 188726092bf5STheodore Ts'o } 188826092bf5STheodore Ts'o 188926092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 189026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 189126092bf5STheodore Ts'o } else if (token == Opt_commit) { 189226092bf5STheodore Ts'o if (arg == 0) 189326092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 18949ba55543Szhangyi (F) else if (arg > INT_MAX / HZ) { 18959ba55543Szhangyi (F) ext4_msg(sb, KERN_ERR, 18969ba55543Szhangyi (F) "Invalid commit interval %d, " 18979ba55543Szhangyi (F) "must be smaller than %d", 18989ba55543Szhangyi (F) arg, INT_MAX / HZ); 18999ba55543Szhangyi (F) return -1; 19009ba55543Szhangyi (F) } 190126092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 1902670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 19039803387cSTheodore Ts'o if ((arg & 1) || 19049803387cSTheodore Ts'o (arg < 4) || 19059803387cSTheodore Ts'o (arg > (sbi->s_inode_size - EXT4_GOOD_OLD_INODE_SIZE))) { 19069803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 19079803387cSTheodore Ts'o "Invalid want_extra_isize %d", arg); 19089803387cSTheodore Ts'o return -1; 19099803387cSTheodore Ts'o } 1910670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 191126092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 191226092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 191326092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 191426092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 191526092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1916e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1917e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1918e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1919e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 192026092bf5STheodore Ts'o return -1; 192126092bf5STheodore Ts'o } 192226092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 192326092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 192426092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 192526092bf5STheodore Ts'o if (!args->from) 192626092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 192726092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1928df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1929df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 193026092bf5STheodore Ts'o } else if (token == Opt_stripe) { 193126092bf5STheodore Ts'o sbi->s_stripe = arg; 19320efb3b23SJan Kara } else if (token == Opt_resuid) { 19330efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 19340efb3b23SJan Kara if (!uid_valid(uid)) { 19355f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 19360efb3b23SJan Kara return -1; 19370efb3b23SJan Kara } 19380efb3b23SJan Kara sbi->s_resuid = uid; 19390efb3b23SJan Kara } else if (token == Opt_resgid) { 19400efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 19410efb3b23SJan Kara if (!gid_valid(gid)) { 19425f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 19430efb3b23SJan Kara return -1; 19440efb3b23SJan Kara } 19450efb3b23SJan Kara sbi->s_resgid = gid; 19460efb3b23SJan Kara } else if (token == Opt_journal_dev) { 19470efb3b23SJan Kara if (is_remount) { 19480efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 19490efb3b23SJan Kara "Cannot specify journal on remount"); 19500efb3b23SJan Kara return -1; 19510efb3b23SJan Kara } 19520efb3b23SJan Kara *journal_devnum = arg; 1953ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1954ad4eec61SEric Sandeen char *journal_path; 1955ad4eec61SEric Sandeen struct inode *journal_inode; 1956ad4eec61SEric Sandeen struct path path; 1957ad4eec61SEric Sandeen int error; 1958ad4eec61SEric Sandeen 1959ad4eec61SEric Sandeen if (is_remount) { 1960ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1961ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1962ad4eec61SEric Sandeen return -1; 1963ad4eec61SEric Sandeen } 1964ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1965ad4eec61SEric Sandeen if (!journal_path) { 1966ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1967ad4eec61SEric Sandeen "journal device string"); 1968ad4eec61SEric Sandeen return -1; 1969ad4eec61SEric Sandeen } 1970ad4eec61SEric Sandeen 1971ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1972ad4eec61SEric Sandeen if (error) { 1973ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1974ad4eec61SEric Sandeen "journal device path: error %d", error); 1975ad4eec61SEric Sandeen kfree(journal_path); 1976ad4eec61SEric Sandeen return -1; 1977ad4eec61SEric Sandeen } 1978ad4eec61SEric Sandeen 19792b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1980ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1981ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1982ad4eec61SEric Sandeen "is not a block device", journal_path); 1983ad4eec61SEric Sandeen path_put(&path); 1984ad4eec61SEric Sandeen kfree(journal_path); 1985ad4eec61SEric Sandeen return -1; 1986ad4eec61SEric Sandeen } 1987ad4eec61SEric Sandeen 1988ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1989ad4eec61SEric Sandeen path_put(&path); 1990ad4eec61SEric Sandeen kfree(journal_path); 19910efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 19920efb3b23SJan Kara if (arg > 7) { 19935f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 19940efb3b23SJan Kara " (must be 0-7)"); 19950efb3b23SJan Kara return -1; 19960efb3b23SJan Kara } 19970efb3b23SJan Kara *journal_ioprio = 19980efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 19996ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 2000643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 20016ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 20026ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 20036ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 20046ddb2447STheodore Ts'o #else 20056ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 20066ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 20076ddb2447STheodore Ts'o #endif 200826092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 200926092bf5STheodore Ts'o if (is_remount) { 201026092bf5STheodore Ts'o if (!sbi->s_journal) 201126092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 20125f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 201326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 201426092bf5STheodore Ts'o "Cannot change data mode on remount"); 201526092bf5STheodore Ts'o return -1; 201626092bf5STheodore Ts'o } 201726092bf5STheodore Ts'o } else { 201826092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 201926092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 202026092bf5STheodore Ts'o } 202126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 202226092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 202326092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 202426092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 20255f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 20265f3633e3SJan Kara "quota options when quota turned on"); 202726092bf5STheodore Ts'o return -1; 202826092bf5STheodore Ts'o } 2029e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 2030c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 2031c325a67cSTheodore Ts'o "Quota format mount options ignored " 2032262b4662SJan Kara "when QUOTA feature is enabled"); 2033c325a67cSTheodore Ts'o return 1; 2034262b4662SJan Kara } 203526092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 203626092bf5STheodore Ts'o #endif 2037923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 2038ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 2039ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 2040ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 2041ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 2042ef83b6e8SDan Williams #else 2043923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 2044923ae0ffSRoss Zwisler return -1; 2045923ae0ffSRoss Zwisler #endif 20467915a861SAles Novak } else if (token == Opt_data_err_abort) { 20477915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 20487915a861SAles Novak } else if (token == Opt_data_err_ignore) { 20497915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 205026092bf5STheodore Ts'o } else { 205126092bf5STheodore Ts'o if (!args->from) 205226092bf5STheodore Ts'o arg = 1; 205326092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 205426092bf5STheodore Ts'o arg = !arg; 205526092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 205626092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 205726092bf5STheodore Ts'o "buggy handling of option %s", opt); 205826092bf5STheodore Ts'o WARN_ON(1); 205926092bf5STheodore Ts'o return -1; 206026092bf5STheodore Ts'o } 206126092bf5STheodore Ts'o if (arg != 0) 206226092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 206326092bf5STheodore Ts'o else 206426092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 206526092bf5STheodore Ts'o } 206626092bf5STheodore Ts'o return 1; 206726092bf5STheodore Ts'o } 206826092bf5STheodore Ts'o 2069ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 2070c3191067STheodore Ts'o unsigned long *journal_devnum, 2071b3881f74STheodore Ts'o unsigned int *journal_ioprio, 2072661aa520SEric Sandeen int is_remount) 2073ac27a0ecSDave Kleikamp { 20741e1a76edSOlof Johansson struct ext4_sb_info __maybe_unused *sbi = EXT4_SB(sb); 207533458eabSTheodore Ts'o char *p, __maybe_unused *usr_qf_name, __maybe_unused *grp_qf_name; 2076ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 207726092bf5STheodore Ts'o int token; 2078ac27a0ecSDave Kleikamp 2079ac27a0ecSDave Kleikamp if (!options) 2080ac27a0ecSDave Kleikamp return 1; 2081ac27a0ecSDave Kleikamp 2082ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 2083ac27a0ecSDave Kleikamp if (!*p) 2084ac27a0ecSDave Kleikamp continue; 208515121c18SEric Sandeen /* 208615121c18SEric Sandeen * Initialize args struct so we know whether arg was 208715121c18SEric Sandeen * found; some options take optional arguments. 208815121c18SEric Sandeen */ 2089caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 2090ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 209126092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 209226092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 2093ac27a0ecSDave Kleikamp return 0; 2094ac27a0ecSDave Kleikamp } 2095ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 209649da9392SJan Kara /* 209749da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 209849da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 209949da9392SJan Kara * to support legacy quotas in quota files. 210049da9392SJan Kara */ 210149da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 210249da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 210349da9392SJan Kara "Cannot enable project quota enforcement."); 210449da9392SJan Kara return 0; 210549da9392SJan Kara } 210633458eabSTheodore Ts'o usr_qf_name = get_qf_name(sb, sbi, USRQUOTA); 210733458eabSTheodore Ts'o grp_qf_name = get_qf_name(sb, sbi, GRPQUOTA); 210833458eabSTheodore Ts'o if (usr_qf_name || grp_qf_name) { 210933458eabSTheodore Ts'o if (test_opt(sb, USRQUOTA) && usr_qf_name) 2110fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 2111ac27a0ecSDave Kleikamp 211233458eabSTheodore Ts'o if (test_opt(sb, GRPQUOTA) && grp_qf_name) 2113fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 2114ac27a0ecSDave Kleikamp 211556c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 2116b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 2117b31e1552SEric Sandeen "format mixing"); 2118ac27a0ecSDave Kleikamp return 0; 2119ac27a0ecSDave Kleikamp } 2120ac27a0ecSDave Kleikamp 2121ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 2122b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 2123b31e1552SEric Sandeen "not specified"); 2124ac27a0ecSDave Kleikamp return 0; 2125ac27a0ecSDave Kleikamp } 2126ac27a0ecSDave Kleikamp } 2127ac27a0ecSDave Kleikamp #endif 2128ac27a0ecSDave Kleikamp return 1; 2129ac27a0ecSDave Kleikamp } 2130ac27a0ecSDave Kleikamp 21312adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 21322adf6da8STheodore Ts'o struct super_block *sb) 21332adf6da8STheodore Ts'o { 21342adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 21352adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 213633458eabSTheodore Ts'o char *usr_qf_name, *grp_qf_name; 21372adf6da8STheodore Ts'o 21382adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 21392adf6da8STheodore Ts'o char *fmtname = ""; 21402adf6da8STheodore Ts'o 21412adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 21422adf6da8STheodore Ts'o case QFMT_VFS_OLD: 21432adf6da8STheodore Ts'o fmtname = "vfsold"; 21442adf6da8STheodore Ts'o break; 21452adf6da8STheodore Ts'o case QFMT_VFS_V0: 21462adf6da8STheodore Ts'o fmtname = "vfsv0"; 21472adf6da8STheodore Ts'o break; 21482adf6da8STheodore Ts'o case QFMT_VFS_V1: 21492adf6da8STheodore Ts'o fmtname = "vfsv1"; 21502adf6da8STheodore Ts'o break; 21512adf6da8STheodore Ts'o } 21522adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 21532adf6da8STheodore Ts'o } 21542adf6da8STheodore Ts'o 215533458eabSTheodore Ts'o rcu_read_lock(); 215633458eabSTheodore Ts'o usr_qf_name = rcu_dereference(sbi->s_qf_names[USRQUOTA]); 215733458eabSTheodore Ts'o grp_qf_name = rcu_dereference(sbi->s_qf_names[GRPQUOTA]); 215833458eabSTheodore Ts'o if (usr_qf_name) 215933458eabSTheodore Ts'o seq_show_option(seq, "usrjquota", usr_qf_name); 216033458eabSTheodore Ts'o if (grp_qf_name) 216133458eabSTheodore Ts'o seq_show_option(seq, "grpjquota", grp_qf_name); 216233458eabSTheodore Ts'o rcu_read_unlock(); 21632adf6da8STheodore Ts'o #endif 21642adf6da8STheodore Ts'o } 21652adf6da8STheodore Ts'o 21665a916be1STheodore Ts'o static const char *token2str(int token) 21675a916be1STheodore Ts'o { 216850df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 21695a916be1STheodore Ts'o 21705a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 21715a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 21725a916be1STheodore Ts'o break; 21735a916be1STheodore Ts'o return t->pattern; 21745a916be1STheodore Ts'o } 21755a916be1STheodore Ts'o 21762adf6da8STheodore Ts'o /* 21772adf6da8STheodore Ts'o * Show an option if 21782adf6da8STheodore Ts'o * - it's set to a non-default value OR 21792adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 21802adf6da8STheodore Ts'o */ 218166acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 218266acdcf4STheodore Ts'o int nodefs) 21832adf6da8STheodore Ts'o { 21842adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 21852adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 218668afa7e0STyson Nottingham int def_errors, def_mount_opt = sbi->s_def_mount_opt; 21875a916be1STheodore Ts'o const struct mount_opts *m; 218866acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 21892adf6da8STheodore Ts'o 219066acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 219166acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 21922adf6da8STheodore Ts'o 21932adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 21945a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 21955a916be1STheodore Ts'o 21965a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 21975a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 21985a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 21995a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 22005a916be1STheodore Ts'o continue; 220168afa7e0STyson Nottingham if (!nodefs && !(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 22025a916be1STheodore Ts'o continue; /* skip if same as the default */ 22035a916be1STheodore Ts'o if ((want_set && 22045a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 22055a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 22065a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 22075a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 22085a916be1STheodore Ts'o } 22095a916be1STheodore Ts'o 221008cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 22115a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 221208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 221308cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 221408cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 22155a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 221608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 221708cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 221866acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 22195a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 22205a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 22212adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 22225a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 22232adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 22245a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 222566acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 22265a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 222766acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 22285a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 222966acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 22305a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 2231357fdad0SMatthew Garrett if (sb->s_flags & SB_I_VERSION) 22325a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 223366acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 22345a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 223568afa7e0STyson Nottingham if (nodefs || EXT4_MOUNT_DATA_FLAGS & 223668afa7e0STyson Nottingham (sbi->s_mount_opt ^ def_mount_opt)) { 22372adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 22385a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 22392adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 22405a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 22412adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 22425a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 22435a916be1STheodore Ts'o } 224466acdcf4STheodore Ts'o if (nodefs || 224566acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 22465a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 22472adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 22482adf6da8STheodore Ts'o 2249ceec0376STyson Nottingham if (test_opt(sb, INIT_INODE_TABLE) && (nodefs || 225066acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 22515a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2252df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2253df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 22547915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 22557915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 2256338affb5SEric Biggers if (DUMMY_ENCRYPTION_ENABLED(sbi)) 2257338affb5SEric Biggers SEQ_OPTS_PUTS("test_dummy_encryption"); 22582adf6da8STheodore Ts'o 22592adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 22602adf6da8STheodore Ts'o return 0; 22612adf6da8STheodore Ts'o } 22622adf6da8STheodore Ts'o 226366acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 226466acdcf4STheodore Ts'o { 226566acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 226666acdcf4STheodore Ts'o } 226766acdcf4STheodore Ts'o 2268ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 226966acdcf4STheodore Ts'o { 227066acdcf4STheodore Ts'o struct super_block *sb = seq->private; 227166acdcf4STheodore Ts'o int rc; 227266acdcf4STheodore Ts'o 2273bc98a42cSDavid Howells seq_puts(seq, sb_rdonly(sb) ? "ro" : "rw"); 227466acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 227566acdcf4STheodore Ts'o seq_puts(seq, "\n"); 227666acdcf4STheodore Ts'o return rc; 227766acdcf4STheodore Ts'o } 227866acdcf4STheodore Ts'o 2279617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2280ac27a0ecSDave Kleikamp int read_only) 2281ac27a0ecSDave Kleikamp { 2282617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2283c89128a0SJaegeuk Kim int err = 0; 2284ac27a0ecSDave Kleikamp 2285617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2286b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2287b31e1552SEric Sandeen "forcing read-only mode"); 2288c89128a0SJaegeuk Kim err = -EROFS; 2289ac27a0ecSDave Kleikamp } 2290ac27a0ecSDave Kleikamp if (read_only) 2291281b5995STheodore Ts'o goto done; 2292617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2293b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2294b31e1552SEric Sandeen "running e2fsck is recommended"); 2295c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2296b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2297b31e1552SEric Sandeen "warning: mounting fs with errors, " 2298b31e1552SEric Sandeen "running e2fsck is recommended"); 2299ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2300ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2301ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2302b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2303b31e1552SEric Sandeen "warning: maximal mount count reached, " 2304b31e1552SEric Sandeen "running e2fsck is recommended"); 2305ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 23066a0678a7SArnd Bergmann (ext4_get_tstamp(es, s_lastcheck) + 23076a0678a7SArnd Bergmann le32_to_cpu(es->s_checkinterval) <= ktime_get_real_seconds())) 2308b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2309b31e1552SEric Sandeen "warning: checktime reached, " 2310b31e1552SEric Sandeen "running e2fsck is recommended"); 23110390131bSFrank Mayhar if (!sbi->s_journal) 2312216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2313ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2314617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2315e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 23166a0678a7SArnd Bergmann ext4_update_tstamp(es, s_mtime); 23170390131bSFrank Mayhar if (sbi->s_journal) 2318e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2319ac27a0ecSDave Kleikamp 2320c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 2321281b5995STheodore Ts'o done: 2322ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2323a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2324a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2325ac27a0ecSDave Kleikamp sb->s_blocksize, 2326ac27a0ecSDave Kleikamp sbi->s_groups_count, 2327617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2328617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2329a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2330ac27a0ecSDave Kleikamp 23317abc52c2SDan Magenheimer cleancache_init_fs(sb); 2332c89128a0SJaegeuk Kim return err; 2333ac27a0ecSDave Kleikamp } 2334ac27a0ecSDave Kleikamp 2335117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2336117fff10STheodore Ts'o { 2337117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2338117fff10STheodore Ts'o struct flex_groups *new_groups; 2339117fff10STheodore Ts'o int size; 2340117fff10STheodore Ts'o 2341117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2342117fff10STheodore Ts'o return 0; 2343117fff10STheodore Ts'o 2344117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2345117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2346117fff10STheodore Ts'o return 0; 2347117fff10STheodore Ts'o 2348117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2349a7c3e901SMichal Hocko new_groups = kvzalloc(size, GFP_KERNEL); 2350117fff10STheodore Ts'o if (!new_groups) { 2351117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2352117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2353117fff10STheodore Ts'o return -ENOMEM; 2354117fff10STheodore Ts'o } 2355117fff10STheodore Ts'o 2356117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2357117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2358117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2359117fff10STheodore Ts'o sizeof(struct flex_groups))); 2360b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2361117fff10STheodore Ts'o } 2362117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2363117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2364117fff10STheodore Ts'o return 0; 2365117fff10STheodore Ts'o } 2366117fff10STheodore Ts'o 2367772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2368772cb7c8SJose R. Santos { 2369772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2370772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2371772cb7c8SJose R. Santos ext4_group_t flex_group; 2372117fff10STheodore Ts'o int i, err; 2373772cb7c8SJose R. Santos 2374503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2375d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2376772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2377772cb7c8SJose R. Santos return 1; 2378772cb7c8SJose R. Santos } 2379772cb7c8SJose R. Santos 2380117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2381117fff10STheodore Ts'o if (err) 2382772cb7c8SJose R. Santos goto failed; 2383772cb7c8SJose R. Santos 2384772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 238588b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2386772cb7c8SJose R. Santos 2387772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 23887ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 23897ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 239090ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 239124aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 23927ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 23937ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2394772cb7c8SJose R. Santos } 2395772cb7c8SJose R. Santos 2396772cb7c8SJose R. Santos return 1; 2397772cb7c8SJose R. Santos failed: 2398772cb7c8SJose R. Santos return 0; 2399772cb7c8SJose R. Santos } 2400772cb7c8SJose R. Santos 2401e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2402717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2403717d50e4SAndreas Dilger { 2404b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2405717d50e4SAndreas Dilger __u16 crc = 0; 2406717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2407e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2408717d50e4SAndreas Dilger 24099aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2410feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2411feb0ab32SDarrick J. Wong __u32 csum32; 2412b47820edSDaeho Jeong __u16 dummy_csum = 0; 2413feb0ab32SDarrick J. Wong 2414feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2415feb0ab32SDarrick J. Wong sizeof(le_group)); 2416b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2417b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2418b47820edSDaeho Jeong sizeof(dummy_csum)); 2419b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2420b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2421b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2422b47820edSDaeho Jeong sbi->s_desc_size - offset); 2423feb0ab32SDarrick J. Wong 2424feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2425feb0ab32SDarrick J. Wong goto out; 2426feb0ab32SDarrick J. Wong } 2427feb0ab32SDarrick J. Wong 2428feb0ab32SDarrick J. Wong /* old crc16 code */ 2429e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2430813d32f9SDarrick J. Wong return 0; 2431813d32f9SDarrick J. Wong 2432717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2433717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2434717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2435717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2436717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2437e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2438717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2439717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2440717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2441717d50e4SAndreas Dilger offset); 2442717d50e4SAndreas Dilger 2443feb0ab32SDarrick J. Wong out: 2444717d50e4SAndreas Dilger return cpu_to_le16(crc); 2445717d50e4SAndreas Dilger } 2446717d50e4SAndreas Dilger 2447feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2448717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2449717d50e4SAndreas Dilger { 2450feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2451e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2452717d50e4SAndreas Dilger return 0; 2453717d50e4SAndreas Dilger 2454717d50e4SAndreas Dilger return 1; 2455717d50e4SAndreas Dilger } 2456717d50e4SAndreas Dilger 2457feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2458feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2459feb0ab32SDarrick J. Wong { 2460feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2461feb0ab32SDarrick J. Wong return; 2462e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2463feb0ab32SDarrick J. Wong } 2464feb0ab32SDarrick J. Wong 2465ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2466bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2467829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2468bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2469ac27a0ecSDave Kleikamp { 2470617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2471617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2472617ba13bSMingming Cao ext4_fsblk_t last_block; 247344de022cSTheodore Ts'o ext4_fsblk_t last_bg_block = sb_block + ext4_bg_num_gdb(sb, 0); 2474bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2475bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2476bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2477ce421581SJose R. Santos int flexbg_flag = 0; 2478bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2479ac27a0ecSDave Kleikamp 2480e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2481ce421581SJose R. Santos flexbg_flag = 1; 2482ce421581SJose R. Santos 2483617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2484ac27a0ecSDave Kleikamp 2485197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2486197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2487197cd65aSAkinobu Mita 2488ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2489bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2490ac27a0ecSDave Kleikamp else 2491ac27a0ecSDave Kleikamp last_block = first_block + 2492617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2493ac27a0ecSDave Kleikamp 2494bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2495bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2496bfff6873SLukas Czerner grp = i; 2497bfff6873SLukas Czerner 24988fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2499829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2500829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2501829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2502829fa70dSTheodore Ts'o "superblock", i); 250318db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 250418db4b4eSTheodore Ts'o return 0; 2505829fa70dSTheodore Ts'o } 250677260807STheodore Ts'o if (block_bitmap >= sb_block + 1 && 250777260807STheodore Ts'o block_bitmap <= last_bg_block) { 250877260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 250977260807STheodore Ts'o "Block bitmap for group %u overlaps " 251077260807STheodore Ts'o "block group descriptors", i); 251177260807STheodore Ts'o if (!sb_rdonly(sb)) 251277260807STheodore Ts'o return 0; 251377260807STheodore Ts'o } 25142b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2515b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2516a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2517b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2518ac27a0ecSDave Kleikamp return 0; 2519ac27a0ecSDave Kleikamp } 25208fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2521829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2522829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2523829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2524829fa70dSTheodore Ts'o "superblock", i); 252518db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 252618db4b4eSTheodore Ts'o return 0; 2527829fa70dSTheodore Ts'o } 252877260807STheodore Ts'o if (inode_bitmap >= sb_block + 1 && 252977260807STheodore Ts'o inode_bitmap <= last_bg_block) { 253077260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 253177260807STheodore Ts'o "Inode bitmap for group %u overlaps " 253277260807STheodore Ts'o "block group descriptors", i); 253377260807STheodore Ts'o if (!sb_rdonly(sb)) 253477260807STheodore Ts'o return 0; 253577260807STheodore Ts'o } 25362b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2537b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2538a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2539b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2540ac27a0ecSDave Kleikamp return 0; 2541ac27a0ecSDave Kleikamp } 25428fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2543829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2544829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2545829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2546829fa70dSTheodore Ts'o "superblock", i); 254718db4b4eSTheodore Ts'o if (!sb_rdonly(sb)) 254818db4b4eSTheodore Ts'o return 0; 2549829fa70dSTheodore Ts'o } 255077260807STheodore Ts'o if (inode_table >= sb_block + 1 && 255177260807STheodore Ts'o inode_table <= last_bg_block) { 255277260807STheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 255377260807STheodore Ts'o "Inode table for group %u overlaps " 255477260807STheodore Ts'o "block group descriptors", i); 255577260807STheodore Ts'o if (!sb_rdonly(sb)) 255677260807STheodore Ts'o return 0; 255777260807STheodore Ts'o } 2558bd81d8eeSLaurent Vivier if (inode_table < first_block || 25592b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2560b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2561a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2562b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2563ac27a0ecSDave Kleikamp return 0; 2564ac27a0ecSDave Kleikamp } 2565955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2566feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2567b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2568b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2569e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2570fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 2571bc98a42cSDavid Howells if (!sb_rdonly(sb)) { 2572955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2573717d50e4SAndreas Dilger return 0; 2574717d50e4SAndreas Dilger } 25757ee1ec4cSLi Zefan } 2576955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2577ce421581SJose R. Santos if (!flexbg_flag) 2578617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2579ac27a0ecSDave Kleikamp } 2580bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2581bfff6873SLukas Czerner *first_not_zeroed = grp; 2582ac27a0ecSDave Kleikamp return 1; 2583ac27a0ecSDave Kleikamp } 2584ac27a0ecSDave Kleikamp 2585617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2586ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2587ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2588ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2589ac27a0ecSDave Kleikamp * 2590ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2591ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2592ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2593ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2594ac27a0ecSDave Kleikamp * 2595ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2596ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2597ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2598617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2599ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2600ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2601ac27a0ecSDave Kleikamp */ 2602617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2603617ba13bSMingming Cao struct ext4_super_block *es) 2604ac27a0ecSDave Kleikamp { 2605ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 26062c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2607ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 260895f1fda4Szhangyi (F) int quota_update = 0; 2609ac27a0ecSDave Kleikamp int i; 2610ac27a0ecSDave Kleikamp #endif 2611ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2612ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2613ac27a0ecSDave Kleikamp return; 2614ac27a0ecSDave Kleikamp } 2615ac27a0ecSDave Kleikamp 2616a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2617b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2618b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2619a8f48a95SEric Sandeen return; 2620a8f48a95SEric Sandeen } 2621a8f48a95SEric Sandeen 2622d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2623d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2624d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2625d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2626d39195c3SAmir Goldstein return; 2627d39195c3SAmir Goldstein } 2628d39195c3SAmir Goldstein 2629617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2630c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 26311751e8a6SLinus Torvalds if (es->s_last_orphan && !(s_flags & SB_RDONLY)) { 263284474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2633ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2634ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2635c25f9bc6SEric Sandeen } 2636ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2637ac27a0ecSDave Kleikamp return; 2638ac27a0ecSDave Kleikamp } 2639ac27a0ecSDave Kleikamp 26401751e8a6SLinus Torvalds if (s_flags & SB_RDONLY) { 2641b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 26421751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 2643ac27a0ecSDave Kleikamp } 2644ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2645ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 26461751e8a6SLinus Torvalds sb->s_flags |= SB_ACTIVE; 264795f1fda4Szhangyi (F) 264895f1fda4Szhangyi (F) /* 264995f1fda4Szhangyi (F) * Turn on quotas which were not enabled for read-only mounts if 265095f1fda4Szhangyi (F) * filesystem has quota feature, so that they are updated correctly. 265195f1fda4Szhangyi (F) */ 26521751e8a6SLinus Torvalds if (ext4_has_feature_quota(sb) && (s_flags & SB_RDONLY)) { 265395f1fda4Szhangyi (F) int ret = ext4_enable_quotas(sb); 265495f1fda4Szhangyi (F) 265595f1fda4Szhangyi (F) if (!ret) 265695f1fda4Szhangyi (F) quota_update = 1; 265795f1fda4Szhangyi (F) else 265895f1fda4Szhangyi (F) ext4_msg(sb, KERN_ERR, 265995f1fda4Szhangyi (F) "Cannot turn on quotas: error %d", ret); 266095f1fda4Szhangyi (F) } 266195f1fda4Szhangyi (F) 266295f1fda4Szhangyi (F) /* Turn on journaled quotas used for old sytle */ 2663a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2664617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2665617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 266695f1fda4Szhangyi (F) 266795f1fda4Szhangyi (F) if (!ret) 266895f1fda4Szhangyi (F) quota_update = 1; 266995f1fda4Szhangyi (F) else 2670b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2671b31e1552SEric Sandeen "Cannot turn on journaled " 267295f1fda4Szhangyi (F) "quota: type %d: error %d", i, ret); 2673ac27a0ecSDave Kleikamp } 2674ac27a0ecSDave Kleikamp } 2675ac27a0ecSDave Kleikamp #endif 2676ac27a0ecSDave Kleikamp 2677ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2678ac27a0ecSDave Kleikamp struct inode *inode; 2679ac27a0ecSDave Kleikamp 2680c65d5c6cSVegard Nossum /* 2681c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2682c65d5c6cSVegard Nossum * so, skip the rest. 2683c65d5c6cSVegard Nossum */ 2684c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2685c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2686c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2687c65d5c6cSVegard Nossum break; 2688c65d5c6cSVegard Nossum } 2689c65d5c6cSVegard Nossum 269097bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 269197bd42b9SJosef Bacik if (IS_ERR(inode)) { 2692ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2693ac27a0ecSDave Kleikamp break; 2694ac27a0ecSDave Kleikamp } 2695ac27a0ecSDave Kleikamp 2696617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2697871a2931SChristoph Hellwig dquot_initialize(inode); 2698ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2699566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2700b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2701b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 270246e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2703e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2704ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 27055955102cSAl Viro inode_lock(inode); 270655f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 27072c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 27082c98eb5eSTheodore Ts'o if (ret) 27092c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 27105955102cSAl Viro inode_unlock(inode); 2711ac27a0ecSDave Kleikamp nr_truncates++; 2712ac27a0ecSDave Kleikamp } else { 2713566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2714b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2715b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 271646e665e9SHarvey Harrison __func__, inode->i_ino); 2717ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2718ac27a0ecSDave Kleikamp inode->i_ino); 2719ac27a0ecSDave Kleikamp nr_orphans++; 2720ac27a0ecSDave Kleikamp } 2721ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2722ac27a0ecSDave Kleikamp } 2723ac27a0ecSDave Kleikamp 2724ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2725ac27a0ecSDave Kleikamp 2726ac27a0ecSDave Kleikamp if (nr_orphans) 2727b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2728b31e1552SEric Sandeen PLURAL(nr_orphans)); 2729ac27a0ecSDave Kleikamp if (nr_truncates) 2730b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2731b31e1552SEric Sandeen PLURAL(nr_truncates)); 2732ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 273395f1fda4Szhangyi (F) /* Turn off quotas if they were enabled for orphan cleanup */ 273495f1fda4Szhangyi (F) if (quota_update) { 2735a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 273695f1fda4Szhangyi (F) if (sb_dqopt(sb)->files[i]) 2737287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2738ac27a0ecSDave Kleikamp } 273995f1fda4Szhangyi (F) } 2740ac27a0ecSDave Kleikamp #endif 27411751e8a6SLinus Torvalds sb->s_flags = s_flags; /* Restore SB_RDONLY status */ 2742ac27a0ecSDave Kleikamp } 27430b8e58a1SAndreas Dilger 2744cd2291a4SEric Sandeen /* 2745cd2291a4SEric Sandeen * Maximal extent format file size. 2746cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2747cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2748cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2749cd2291a4SEric Sandeen * so that won't be a limiting factor. 2750cd2291a4SEric Sandeen * 2751f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2752f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2753f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2754f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2755f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2756f17722f9SLukas Czerner * 2757cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2758cd2291a4SEric Sandeen */ 2759f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2760cd2291a4SEric Sandeen { 2761cd2291a4SEric Sandeen loff_t res; 2762cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2763cd2291a4SEric Sandeen 276472deb455SChristoph Hellwig BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64)); 276572deb455SChristoph Hellwig 276672deb455SChristoph Hellwig if (!has_huge_files) { 2767cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2768cd2291a4SEric Sandeen 2769cd2291a4SEric Sandeen /* total blocks in file system block size */ 2770cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2771cd2291a4SEric Sandeen upper_limit <<= blkbits; 2772cd2291a4SEric Sandeen } 2773cd2291a4SEric Sandeen 2774f17722f9SLukas Czerner /* 2775f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2776f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2777f17722f9SLukas Czerner * size 2778f17722f9SLukas Czerner */ 2779f17722f9SLukas Czerner res = (1LL << 32) - 1; 2780cd2291a4SEric Sandeen res <<= blkbits; 2781cd2291a4SEric Sandeen 2782cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2783cd2291a4SEric Sandeen if (res > upper_limit) 2784cd2291a4SEric Sandeen res = upper_limit; 2785cd2291a4SEric Sandeen 2786cd2291a4SEric Sandeen return res; 2787cd2291a4SEric Sandeen } 2788ac27a0ecSDave Kleikamp 2789ac27a0ecSDave Kleikamp /* 2790cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 27910fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 27920fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2793ac27a0ecSDave Kleikamp */ 2794f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2795ac27a0ecSDave Kleikamp { 2796617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 27970fc1b451SAneesh Kumar K.V int meta_blocks; 27980fc1b451SAneesh Kumar K.V loff_t upper_limit; 27990b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 28000b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 28010b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 28020b8e58a1SAndreas Dilger * 28030b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 28040b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 28050fc1b451SAneesh Kumar K.V */ 28060fc1b451SAneesh Kumar K.V 280772deb455SChristoph Hellwig if (!has_huge_files) { 28080fc1b451SAneesh Kumar K.V /* 280972deb455SChristoph Hellwig * !has_huge_files or implies that the inode i_block field 281072deb455SChristoph Hellwig * represents total file blocks in 2^32 512-byte sectors == 281172deb455SChristoph Hellwig * size of vfs inode i_blocks * 8 28120fc1b451SAneesh Kumar K.V */ 28130fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 28140fc1b451SAneesh Kumar K.V 28150fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 28160fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 28170fc1b451SAneesh Kumar K.V 28180fc1b451SAneesh Kumar K.V } else { 28198180a562SAneesh Kumar K.V /* 28208180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 28218180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 28228180a562SAneesh Kumar K.V * represent total number of blocks in 28238180a562SAneesh Kumar K.V * file system block size 28248180a562SAneesh Kumar K.V */ 28250fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 28260fc1b451SAneesh Kumar K.V 28270fc1b451SAneesh Kumar K.V } 28280fc1b451SAneesh Kumar K.V 28290fc1b451SAneesh Kumar K.V /* indirect blocks */ 28300fc1b451SAneesh Kumar K.V meta_blocks = 1; 28310fc1b451SAneesh Kumar K.V /* double indirect blocks */ 28320fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 28330fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 28340fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 28350fc1b451SAneesh Kumar K.V 28360fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 28370fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2838ac27a0ecSDave Kleikamp 2839ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2840ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2841ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2842ac27a0ecSDave Kleikamp res <<= bits; 2843ac27a0ecSDave Kleikamp if (res > upper_limit) 2844ac27a0ecSDave Kleikamp res = upper_limit; 28450fc1b451SAneesh Kumar K.V 28460fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 28470fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 28480fc1b451SAneesh Kumar K.V 2849ac27a0ecSDave Kleikamp return res; 2850ac27a0ecSDave Kleikamp } 2851ac27a0ecSDave Kleikamp 2852617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 285370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2854ac27a0ecSDave Kleikamp { 2855617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2856fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2857ac27a0ecSDave Kleikamp int has_super = 0; 2858ac27a0ecSDave Kleikamp 2859ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2860ac27a0ecSDave Kleikamp 2861e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 286270bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2863ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2864617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2865ac27a0ecSDave Kleikamp has_super = 1; 28660b8e58a1SAndreas Dilger 2867bd63f6b0SDarrick J. Wong /* 2868bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2869bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2870bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2871bd63f6b0SDarrick J. Wong * compensate. 2872bd63f6b0SDarrick J. Wong */ 2873bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 287449598e04SJun Piao le32_to_cpu(sbi->s_es->s_first_data_block) == 0) 2875bd63f6b0SDarrick J. Wong has_super++; 2876bd63f6b0SDarrick J. Wong 2877617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2878ac27a0ecSDave Kleikamp } 2879ac27a0ecSDave Kleikamp 2880c9de560dSAlex Tomas /** 2881c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2882c9de560dSAlex Tomas * @sbi: In memory super block info 2883c9de560dSAlex Tomas * 2884c9de560dSAlex Tomas * If we have specified it via mount option, then 2885c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2886c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2887c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2888c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2889c9de560dSAlex Tomas * 2890c9de560dSAlex Tomas */ 2891c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2892c9de560dSAlex Tomas { 2893c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2894c9de560dSAlex Tomas unsigned long stripe_width = 2895c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 28963eb08658SDan Ehrenberg int ret; 2897c9de560dSAlex Tomas 2898c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 28993eb08658SDan Ehrenberg ret = sbi->s_stripe; 29005469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 29013eb08658SDan Ehrenberg ret = stripe_width; 29025469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 29033eb08658SDan Ehrenberg ret = stride; 29043eb08658SDan Ehrenberg else 29053eb08658SDan Ehrenberg ret = 0; 2906c9de560dSAlex Tomas 29073eb08658SDan Ehrenberg /* 29083eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 29093eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 29103eb08658SDan Ehrenberg */ 29113eb08658SDan Ehrenberg if (ret <= 1) 29123eb08658SDan Ehrenberg ret = 0; 2913c9de560dSAlex Tomas 29143eb08658SDan Ehrenberg return ret; 2915c9de560dSAlex Tomas } 2916ac27a0ecSDave Kleikamp 2917a13fb1a4SEric Sandeen /* 2918a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2919a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2920a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2921a13fb1a4SEric Sandeen * 0 if it cannot be. 2922a13fb1a4SEric Sandeen */ 2923a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2924a13fb1a4SEric Sandeen { 2925e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2926a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2927a13fb1a4SEric Sandeen "Couldn't mount because of " 2928a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2929a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2930a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2931a13fb1a4SEric Sandeen return 0; 2932a13fb1a4SEric Sandeen } 2933a13fb1a4SEric Sandeen 2934c83ad55eSGabriel Krisman Bertazi #ifndef CONFIG_UNICODE 2935c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb)) { 2936c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 2937c83ad55eSGabriel Krisman Bertazi "Filesystem with casefold feature cannot be " 2938c83ad55eSGabriel Krisman Bertazi "mounted without CONFIG_UNICODE"); 2939c83ad55eSGabriel Krisman Bertazi return 0; 2940c83ad55eSGabriel Krisman Bertazi } 2941c83ad55eSGabriel Krisman Bertazi #endif 2942c83ad55eSGabriel Krisman Bertazi 2943a13fb1a4SEric Sandeen if (readonly) 2944a13fb1a4SEric Sandeen return 1; 2945a13fb1a4SEric Sandeen 2946e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 29472cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 29481751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 29492cb5cc8bSDarrick J. Wong return 1; 29502cb5cc8bSDarrick J. Wong } 29512cb5cc8bSDarrick J. Wong 2952a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2953e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2954a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2955a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2956a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2957a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2958a13fb1a4SEric Sandeen return 0; 2959a13fb1a4SEric Sandeen } 2960e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2961bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2962bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2963bab08ab9STheodore Ts'o "extents feature\n"); 2964bab08ab9STheodore Ts'o return 0; 2965bab08ab9STheodore Ts'o } 29667c319d32SAditya Kali 29677c319d32SAditya Kali #ifndef CONFIG_QUOTA 2968e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 29697c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 29707c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 29717c319d32SAditya Kali "without CONFIG_QUOTA"); 29727c319d32SAditya Kali return 0; 29737c319d32SAditya Kali } 2974689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2975689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2976689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2977689c958cSLi Xi "without CONFIG_QUOTA"); 2978689c958cSLi Xi return 0; 2979689c958cSLi Xi } 29807c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2981a13fb1a4SEric Sandeen return 1; 2982a13fb1a4SEric Sandeen } 2983a13fb1a4SEric Sandeen 298466e61a9eSTheodore Ts'o /* 298566e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 298666e61a9eSTheodore Ts'o * on the file system 298766e61a9eSTheodore Ts'o */ 2988235699a8SKees Cook static void print_daily_error_info(struct timer_list *t) 298966e61a9eSTheodore Ts'o { 2990235699a8SKees Cook struct ext4_sb_info *sbi = from_timer(sbi, t, s_err_report); 2991235699a8SKees Cook struct super_block *sb = sbi->s_sb; 2992235699a8SKees Cook struct ext4_super_block *es = sbi->s_es; 299366e61a9eSTheodore Ts'o 299466e61a9eSTheodore Ts'o if (es->s_error_count) 2995ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2996ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 299766e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 299866e61a9eSTheodore Ts'o if (es->s_first_error_time) { 29996a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %llu: %.*s:%d", 30006a0678a7SArnd Bergmann sb->s_id, 30016a0678a7SArnd Bergmann ext4_get_tstamp(es, s_first_error_time), 300266e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 300366e61a9eSTheodore Ts'o es->s_first_error_func, 300466e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 300566e61a9eSTheodore Ts'o if (es->s_first_error_ino) 3006651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 300766e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 300866e61a9eSTheodore Ts'o if (es->s_first_error_block) 3009651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 301066e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 3011651e1c3bSJoe Perches printk(KERN_CONT "\n"); 301266e61a9eSTheodore Ts'o } 301366e61a9eSTheodore Ts'o if (es->s_last_error_time) { 30146a0678a7SArnd Bergmann printk(KERN_NOTICE "EXT4-fs (%s): last error at time %llu: %.*s:%d", 30156a0678a7SArnd Bergmann sb->s_id, 30166a0678a7SArnd Bergmann ext4_get_tstamp(es, s_last_error_time), 301766e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 301866e61a9eSTheodore Ts'o es->s_last_error_func, 301966e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 302066e61a9eSTheodore Ts'o if (es->s_last_error_ino) 3021651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 302266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 302366e61a9eSTheodore Ts'o if (es->s_last_error_block) 3024651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 302566e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 3026651e1c3bSJoe Perches printk(KERN_CONT "\n"); 302766e61a9eSTheodore Ts'o } 302866e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 302966e61a9eSTheodore Ts'o } 303066e61a9eSTheodore Ts'o 3031bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 3032bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 3033bfff6873SLukas Czerner { 3034bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3035bfff6873SLukas Czerner ext4_group_t group, ngroups; 3036bfff6873SLukas Czerner struct super_block *sb; 3037bfff6873SLukas Czerner unsigned long timeout = 0; 3038bfff6873SLukas Czerner int ret = 0; 3039bfff6873SLukas Czerner 3040bfff6873SLukas Czerner sb = elr->lr_super; 3041bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 3042bfff6873SLukas Czerner 3043bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 3044bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3045bfff6873SLukas Czerner if (!gdp) { 3046bfff6873SLukas Czerner ret = 1; 3047bfff6873SLukas Czerner break; 3048bfff6873SLukas Czerner } 3049bfff6873SLukas Czerner 3050bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3051bfff6873SLukas Czerner break; 3052bfff6873SLukas Czerner } 3053bfff6873SLukas Czerner 30547f511862STheodore Ts'o if (group >= ngroups) 3055bfff6873SLukas Czerner ret = 1; 3056bfff6873SLukas Czerner 3057bfff6873SLukas Czerner if (!ret) { 3058bfff6873SLukas Czerner timeout = jiffies; 3059bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 3060bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 3061bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 306251ce6511SLukas Czerner timeout = (jiffies - timeout) * 306351ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 3064bfff6873SLukas Czerner elr->lr_timeout = timeout; 3065bfff6873SLukas Czerner } 3066bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 3067bfff6873SLukas Czerner elr->lr_next_group = group + 1; 3068bfff6873SLukas Czerner } 3069bfff6873SLukas Czerner return ret; 3070bfff6873SLukas Czerner } 3071bfff6873SLukas Czerner 3072bfff6873SLukas Czerner /* 3073bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 30744ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 3075bfff6873SLukas Czerner */ 3076bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 3077bfff6873SLukas Czerner { 3078bfff6873SLukas Czerner struct ext4_sb_info *sbi; 3079bfff6873SLukas Czerner 3080bfff6873SLukas Czerner if (!elr) 3081bfff6873SLukas Czerner return; 3082bfff6873SLukas Czerner 3083bfff6873SLukas Czerner sbi = elr->lr_sbi; 3084bfff6873SLukas Czerner 3085bfff6873SLukas Czerner list_del(&elr->lr_request); 3086bfff6873SLukas Czerner sbi->s_li_request = NULL; 3087bfff6873SLukas Czerner kfree(elr); 3088bfff6873SLukas Czerner } 3089bfff6873SLukas Czerner 3090bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 3091bfff6873SLukas Czerner { 30921bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 30931bb933fbSLukas Czerner if (!ext4_li_info) { 30941bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3095bfff6873SLukas Czerner return; 30961bb933fbSLukas Czerner } 3097bfff6873SLukas Czerner 3098bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 30991bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 3100bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 31011bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 3102bfff6873SLukas Czerner } 3103bfff6873SLukas Czerner 31048f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 31058f1f7453SEric Sandeen 3106bfff6873SLukas Czerner /* 3107bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 3108bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 3109bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 3110bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 3111bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 3112bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 3113bfff6873SLukas Czerner * next waking time and put itself into sleep. 3114bfff6873SLukas Czerner */ 3115bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 3116bfff6873SLukas Czerner { 3117bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 3118bfff6873SLukas Czerner struct list_head *pos, *n; 3119bfff6873SLukas Czerner struct ext4_li_request *elr; 31204ed5c033SLukas Czerner unsigned long next_wakeup, cur; 3121bfff6873SLukas Czerner 3122bfff6873SLukas Czerner BUG_ON(NULL == eli); 3123bfff6873SLukas Czerner 3124bfff6873SLukas Czerner cont_thread: 3125bfff6873SLukas Czerner while (true) { 3126bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 3127bfff6873SLukas Czerner 3128bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3129bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 3130bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3131bfff6873SLukas Czerner goto exit_thread; 3132bfff6873SLukas Czerner } 3133bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 3134e22834f0SDmitry Monakhov int err = 0; 3135e22834f0SDmitry Monakhov int progress = 0; 3136bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3137bfff6873SLukas Czerner lr_request); 3138bfff6873SLukas Czerner 3139e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 3140e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 3141e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 3142e22834f0SDmitry Monakhov continue; 3143e22834f0SDmitry Monakhov } 3144e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 3145e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 3146e22834f0SDmitry Monakhov progress = 1; 3147e22834f0SDmitry Monakhov /* 3148e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 3149e22834f0SDmitry Monakhov * be removed from the list, it is 3150e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 3151e22834f0SDmitry Monakhov */ 3152e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 3153e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 3154e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 3155e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 3156e22834f0SDmitry Monakhov n = pos->next; 3157e22834f0SDmitry Monakhov } 3158e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 3159e22834f0SDmitry Monakhov } 3160b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 3161e22834f0SDmitry Monakhov if (err) { 3162bfff6873SLukas Czerner ext4_remove_li_request(elr); 3163bfff6873SLukas Czerner continue; 3164bfff6873SLukas Czerner } 3165e22834f0SDmitry Monakhov if (!progress) { 3166e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 3167e22834f0SDmitry Monakhov (prandom_u32() 3168e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3169b2c78cd0STheodore Ts'o } 3170bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 3171bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 3172bfff6873SLukas Czerner } 3173bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3174bfff6873SLukas Czerner 3175a0acae0eSTejun Heo try_to_freeze(); 3176bfff6873SLukas Czerner 31774ed5c033SLukas Czerner cur = jiffies; 31784ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3179f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3180bfff6873SLukas Czerner cond_resched(); 3181bfff6873SLukas Czerner continue; 3182bfff6873SLukas Czerner } 3183bfff6873SLukas Czerner 31844ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 31854ed5c033SLukas Czerner 31868f1f7453SEric Sandeen if (kthread_should_stop()) { 31878f1f7453SEric Sandeen ext4_clear_request_list(); 31888f1f7453SEric Sandeen goto exit_thread; 31898f1f7453SEric Sandeen } 3190bfff6873SLukas Czerner } 3191bfff6873SLukas Czerner 3192bfff6873SLukas Czerner exit_thread: 3193bfff6873SLukas Czerner /* 3194bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3195bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3196bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3197bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3198bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3199bfff6873SLukas Czerner * new one. 3200bfff6873SLukas Czerner */ 3201bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3202bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3203bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3204bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3205bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3206bfff6873SLukas Czerner goto cont_thread; 3207bfff6873SLukas Czerner } 3208bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3209bfff6873SLukas Czerner kfree(ext4_li_info); 3210bfff6873SLukas Czerner ext4_li_info = NULL; 3211bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3212bfff6873SLukas Czerner 3213bfff6873SLukas Czerner return 0; 3214bfff6873SLukas Czerner } 3215bfff6873SLukas Czerner 3216bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3217bfff6873SLukas Czerner { 3218bfff6873SLukas Czerner struct list_head *pos, *n; 3219bfff6873SLukas Czerner struct ext4_li_request *elr; 3220bfff6873SLukas Czerner 3221bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3222bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3223bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3224bfff6873SLukas Czerner lr_request); 3225bfff6873SLukas Czerner ext4_remove_li_request(elr); 3226bfff6873SLukas Czerner } 3227bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3228bfff6873SLukas Czerner } 3229bfff6873SLukas Czerner 3230bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3231bfff6873SLukas Czerner { 32328f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 32338f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 32348f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 32358f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3236bfff6873SLukas Czerner ext4_clear_request_list(); 3237bfff6873SLukas Czerner kfree(ext4_li_info); 3238bfff6873SLukas Czerner ext4_li_info = NULL; 323992b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3240bfff6873SLukas Czerner "initialization thread\n", 3241bfff6873SLukas Czerner err); 3242bfff6873SLukas Czerner return err; 3243bfff6873SLukas Czerner } 3244bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3245bfff6873SLukas Czerner return 0; 3246bfff6873SLukas Czerner } 3247bfff6873SLukas Czerner 3248bfff6873SLukas Czerner /* 3249bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3250bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3251bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3252bfff6873SLukas Czerner * groups and return total number of groups. 3253bfff6873SLukas Czerner */ 3254bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3255bfff6873SLukas Czerner { 3256bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3257bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3258bfff6873SLukas Czerner 32598844618dSTheodore Ts'o if (!ext4_has_group_desc_csum(sb)) 32608844618dSTheodore Ts'o return ngroups; 32618844618dSTheodore Ts'o 3262bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3263bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3264bfff6873SLukas Czerner if (!gdp) 3265bfff6873SLukas Czerner continue; 3266bfff6873SLukas Czerner 326750122847STheodore Ts'o if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3268bfff6873SLukas Czerner break; 3269bfff6873SLukas Czerner } 3270bfff6873SLukas Czerner 3271bfff6873SLukas Czerner return group; 3272bfff6873SLukas Czerner } 3273bfff6873SLukas Czerner 3274bfff6873SLukas Czerner static int ext4_li_info_new(void) 3275bfff6873SLukas Czerner { 3276bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3277bfff6873SLukas Czerner 3278bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3279bfff6873SLukas Czerner if (!eli) 3280bfff6873SLukas Czerner return -ENOMEM; 3281bfff6873SLukas Czerner 3282bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3283bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3284bfff6873SLukas Czerner 3285bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3286bfff6873SLukas Czerner 3287bfff6873SLukas Czerner ext4_li_info = eli; 3288bfff6873SLukas Czerner 3289bfff6873SLukas Czerner return 0; 3290bfff6873SLukas Czerner } 3291bfff6873SLukas Czerner 3292bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3293bfff6873SLukas Czerner ext4_group_t start) 3294bfff6873SLukas Czerner { 3295bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3296bfff6873SLukas Czerner struct ext4_li_request *elr; 3297bfff6873SLukas Czerner 3298bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3299bfff6873SLukas Czerner if (!elr) 3300bfff6873SLukas Czerner return NULL; 3301bfff6873SLukas Czerner 3302bfff6873SLukas Czerner elr->lr_super = sb; 3303bfff6873SLukas Czerner elr->lr_sbi = sbi; 3304bfff6873SLukas Czerner elr->lr_next_group = start; 3305bfff6873SLukas Czerner 3306bfff6873SLukas Czerner /* 3307bfff6873SLukas Czerner * Randomize first schedule time of the request to 3308bfff6873SLukas Czerner * spread the inode table initialization requests 3309bfff6873SLukas Czerner * better. 3310bfff6873SLukas Czerner */ 3311dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3312dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3313bfff6873SLukas Czerner return elr; 3314bfff6873SLukas Czerner } 3315bfff6873SLukas Czerner 33167f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3317bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3318bfff6873SLukas Czerner { 3319bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 33207f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 332149598e04SJun Piao ext4_group_t ngroups = sbi->s_groups_count; 33226c5a6cb9SAndrew Morton int ret = 0; 3323bfff6873SLukas Czerner 33247f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 332551ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 332651ce6511SLukas Czerner /* 332751ce6511SLukas Czerner * Reset timeout so it can be computed again, because 332851ce6511SLukas Czerner * s_li_wait_mult might have changed. 332951ce6511SLukas Czerner */ 333051ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 33317f511862STheodore Ts'o goto out; 333251ce6511SLukas Czerner } 3333bfff6873SLukas Czerner 3334bc98a42cSDavid Howells if (first_not_zeroed == ngroups || sb_rdonly(sb) || 333555ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 33367f511862STheodore Ts'o goto out; 3337bfff6873SLukas Czerner 3338bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 33397f511862STheodore Ts'o if (!elr) { 33407f511862STheodore Ts'o ret = -ENOMEM; 33417f511862STheodore Ts'o goto out; 33427f511862STheodore Ts'o } 3343bfff6873SLukas Czerner 3344bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3345bfff6873SLukas Czerner ret = ext4_li_info_new(); 3346bfff6873SLukas Czerner if (ret) 3347bfff6873SLukas Czerner goto out; 3348bfff6873SLukas Czerner } 3349bfff6873SLukas Czerner 3350bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3351bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3352bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3353bfff6873SLukas Czerner 3354bfff6873SLukas Czerner sbi->s_li_request = elr; 335546e4690bSTao Ma /* 335646e4690bSTao Ma * set elr to NULL here since it has been inserted to 335746e4690bSTao Ma * the request_list and the removal and free of it is 335846e4690bSTao Ma * handled by ext4_clear_request_list from now on. 335946e4690bSTao Ma */ 336046e4690bSTao Ma elr = NULL; 3361bfff6873SLukas Czerner 3362bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3363bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3364bfff6873SLukas Czerner if (ret) 3365bfff6873SLukas Czerner goto out; 3366bfff6873SLukas Czerner } 3367bfff6873SLukas Czerner out: 3368bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3369beed5ecbSNicolas Kaiser if (ret) 3370bfff6873SLukas Czerner kfree(elr); 3371bfff6873SLukas Czerner return ret; 3372bfff6873SLukas Czerner } 3373bfff6873SLukas Czerner 3374bfff6873SLukas Czerner /* 3375bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3376bfff6873SLukas Czerner * module unload. 3377bfff6873SLukas Czerner */ 3378bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3379bfff6873SLukas Czerner { 3380bfff6873SLukas Czerner /* 3381bfff6873SLukas Czerner * If thread exited earlier 3382bfff6873SLukas Czerner * there's nothing to be done. 3383bfff6873SLukas Czerner */ 33848f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3385bfff6873SLukas Czerner return; 3386bfff6873SLukas Czerner 33878f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3388bfff6873SLukas Czerner } 3389bfff6873SLukas Czerner 339025ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 339125ed6e8aSDarrick J. Wong { 339225ed6e8aSDarrick J. Wong int ret = 1; 339325ed6e8aSDarrick J. Wong int compat, incompat; 339425ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 339525ed6e8aSDarrick J. Wong 33969aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3397db9ee220SDarrick J. Wong /* journal checksum v3 */ 339825ed6e8aSDarrick J. Wong compat = 0; 3399db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 340025ed6e8aSDarrick J. Wong } else { 340125ed6e8aSDarrick J. Wong /* journal checksum v1 */ 340225ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 340325ed6e8aSDarrick J. Wong incompat = 0; 340425ed6e8aSDarrick J. Wong } 340525ed6e8aSDarrick J. Wong 3406feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3407feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3408feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3409feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 341025ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 341125ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 341225ed6e8aSDarrick J. Wong compat, 0, 341325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 341425ed6e8aSDarrick J. Wong incompat); 341525ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 341625ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 341725ed6e8aSDarrick J. Wong compat, 0, 341825ed6e8aSDarrick J. Wong incompat); 341925ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 342025ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 342125ed6e8aSDarrick J. Wong } else { 3422feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3423feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 342425ed6e8aSDarrick J. Wong } 342525ed6e8aSDarrick J. Wong 342625ed6e8aSDarrick J. Wong return ret; 342725ed6e8aSDarrick J. Wong } 342825ed6e8aSDarrick J. Wong 3429952fc18eSTheodore Ts'o /* 3430952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3431952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3432952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3433952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3434952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3435952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3436952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3437952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3438952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3439952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3440952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3441952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3442952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3443952fc18eSTheodore Ts'o */ 3444952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3445952fc18eSTheodore Ts'o char *buf) 3446952fc18eSTheodore Ts'o { 3447952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3448952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3449952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3450952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3451952fc18eSTheodore Ts'o int s, j, count = 0; 3452952fc18eSTheodore Ts'o 3453e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 34540548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 34550548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 34560548bbb8STheodore Ts'o 3457952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3458952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3459952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3460952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3461952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3462952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3463952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3464952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3465952fc18eSTheodore Ts'o count++; 3466952fc18eSTheodore Ts'o } 3467952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3468952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3469952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3470952fc18eSTheodore Ts'o count++; 3471952fc18eSTheodore Ts'o } 3472952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3473952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3474952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3475952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3476952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3477952fc18eSTheodore Ts'o count++; 3478952fc18eSTheodore Ts'o } 3479952fc18eSTheodore Ts'o if (i != grp) 3480952fc18eSTheodore Ts'o continue; 3481952fc18eSTheodore Ts'o s = 0; 3482952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3483952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3484952fc18eSTheodore Ts'o count++; 3485952fc18eSTheodore Ts'o } 3486c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3487c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3488c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3489c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3490c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3491952fc18eSTheodore Ts'o } 3492c48ae41bSTheodore Ts'o count += j; 3493c48ae41bSTheodore Ts'o for (; j > 0; j--) 3494c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3495952fc18eSTheodore Ts'o } 3496952fc18eSTheodore Ts'o if (!count) 3497952fc18eSTheodore Ts'o return 0; 3498952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3499952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3500952fc18eSTheodore Ts'o } 3501952fc18eSTheodore Ts'o 3502952fc18eSTheodore Ts'o /* 3503952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3504952fc18eSTheodore Ts'o */ 3505952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3506952fc18eSTheodore Ts'o { 3507952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3508952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 35093c816dedSEric Whitney struct inode *j_inode; 35103c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3511952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3512952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 35134fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3514952fc18eSTheodore Ts'o 3515952fc18eSTheodore Ts'o if (!buf) 3516952fc18eSTheodore Ts'o return -ENOMEM; 3517952fc18eSTheodore Ts'o 3518952fc18eSTheodore Ts'o /* 3519952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3520952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3521952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3522952fc18eSTheodore Ts'o */ 3523952fc18eSTheodore Ts'o 3524952fc18eSTheodore Ts'o /* 3525952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3526952fc18eSTheodore Ts'o */ 3527952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3528952fc18eSTheodore Ts'o 3529952fc18eSTheodore Ts'o /* 3530952fc18eSTheodore Ts'o * Add the overhead found in each block group 3531952fc18eSTheodore Ts'o */ 3532952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3533952fc18eSTheodore Ts'o int blks; 3534952fc18eSTheodore Ts'o 3535952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3536952fc18eSTheodore Ts'o overhead += blks; 3537952fc18eSTheodore Ts'o if (blks) 3538952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3539952fc18eSTheodore Ts'o cond_resched(); 3540952fc18eSTheodore Ts'o } 35413c816dedSEric Whitney 35423c816dedSEric Whitney /* 35433c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 35443c816dedSEric Whitney * loaded or not 35453c816dedSEric Whitney */ 3546b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3547810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 35483c816dedSEric Whitney else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { 35493c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 35503c816dedSEric Whitney if (j_inode) { 35513c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 35523c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 35533c816dedSEric Whitney iput(j_inode); 35543c816dedSEric Whitney } else { 35553c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 35563c816dedSEric Whitney } 35573c816dedSEric Whitney } 3558952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3559952fc18eSTheodore Ts'o smp_wmb(); 3560952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3561952fc18eSTheodore Ts'o return 0; 3562952fc18eSTheodore Ts'o } 3563952fc18eSTheodore Ts'o 3564b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 356527dd4385SLukas Czerner { 356627dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3567b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 356827dd4385SLukas Czerner 356927dd4385SLukas Czerner /* 357030fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 357130fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 357230fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 357330fac0f7SJan Kara * to keep ext2/3 backward compatibility. 357430fac0f7SJan Kara */ 3575e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3576b5799018STheodore Ts'o return; 357730fac0f7SJan Kara /* 357827dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 357927dd4385SLukas Czerner * This should cover the situations where we can not afford to run 358027dd4385SLukas Czerner * out of space like for example punch hole, or converting 3581556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 358227dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 358327dd4385SLukas Czerner * very rare. 358427dd4385SLukas Czerner */ 3585b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3586b5799018STheodore Ts'o sbi->s_cluster_bits); 358727dd4385SLukas Czerner 358827dd4385SLukas Czerner do_div(resv_clusters, 50); 358927dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 359027dd4385SLukas Czerner 3591b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 359227dd4385SLukas Czerner } 359327dd4385SLukas Czerner 3594617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3595ac27a0ecSDave Kleikamp { 35965e405595SDan Williams struct dax_device *dax_dev = fs_dax_get_by_bdev(sb->s_bdev); 3597d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3598ac27a0ecSDave Kleikamp struct buffer_head *bh; 3599617ba13bSMingming Cao struct ext4_super_block *es = NULL; 36005aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3601617ba13bSMingming Cao ext4_fsblk_t block; 3602617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 360370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3604ac27a0ecSDave Kleikamp unsigned long offset = 0; 3605ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3606ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3607ac27a0ecSDave Kleikamp struct inode *root; 36080390131bSFrank Mayhar const char *descr; 3609dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3610281b5995STheodore Ts'o int blocksize, clustersize; 36114ec11028STheodore Ts'o unsigned int db_count; 36124ec11028STheodore Ts'o unsigned int i; 3613281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3614bd81d8eeSLaurent Vivier __u64 blocks_count; 361507aa2ea1SLukas Czerner int err = 0; 3616b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3617bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3618ac27a0ecSDave Kleikamp 36195aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 36205aee0f8aSTheodore Ts'o goto out_free_base; 3621705895b6SPekka Enberg 3622aed9eb1bSColin Ian King sbi->s_daxdev = dax_dev; 3623705895b6SPekka Enberg sbi->s_blockgroup_lock = 3624705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 36255aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 36265aee0f8aSTheodore Ts'o goto out_free_base; 36275aee0f8aSTheodore Ts'o 3628ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 36292c0544b2STheodore Ts'o sbi->s_sb = sb; 3630240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3631d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3632f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3633f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3634dbae2c55SMichael Callahan part_stat_read(sb->s_bdev->bd_part, sectors[STAT_WRITE]); 3635ac27a0ecSDave Kleikamp 36369f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3637ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 36389f6200bbSTheodore Ts'o 363907aa2ea1SLukas Czerner /* -EINVAL is default */ 3640dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3641617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3642ac27a0ecSDave Kleikamp if (!blocksize) { 3643b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3644ac27a0ecSDave Kleikamp goto out_fail; 3645ac27a0ecSDave Kleikamp } 3646ac27a0ecSDave Kleikamp 3647ac27a0ecSDave Kleikamp /* 3648617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3649ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3650ac27a0ecSDave Kleikamp */ 3651617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 365270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 365370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3654ac27a0ecSDave Kleikamp } else { 365570bbb3e0SAndrew Morton logical_sb_block = sb_block; 3656ac27a0ecSDave Kleikamp } 3657ac27a0ecSDave Kleikamp 3658a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3659b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3660ac27a0ecSDave Kleikamp goto out_fail; 3661ac27a0ecSDave Kleikamp } 3662ac27a0ecSDave Kleikamp /* 3663ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3664617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3665ac27a0ecSDave Kleikamp */ 36662716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3667ac27a0ecSDave Kleikamp sbi->s_es = es; 3668ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3669617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3670617ba13bSMingming Cao goto cantfind_ext4; 3671afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3672ac27a0ecSDave Kleikamp 3673feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3674e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3675e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3676363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3677feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3678feb0ab32SDarrick J. Wong 3679d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3680d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3681d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3682d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3683d25425f8SDarrick J. Wong silent = 1; 3684d25425f8SDarrick J. Wong goto cantfind_ext4; 3685d25425f8SDarrick J. Wong } 3686d25425f8SDarrick J. Wong 36870441984aSDarrick J. Wong /* Load the checksum driver */ 36880441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 36890441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 36900441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 36910441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 36920441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 36930441984aSDarrick J. Wong goto failed_mount; 36940441984aSDarrick J. Wong } 36950441984aSDarrick J. Wong 3696a9c47317SDarrick J. Wong /* Check superblock checksum */ 3697a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3698a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3699a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3700a9c47317SDarrick J. Wong silent = 1; 37016a797d27SDarrick J. Wong ret = -EFSBADCRC; 3702a9c47317SDarrick J. Wong goto cantfind_ext4; 3703a9c47317SDarrick J. Wong } 3704a9c47317SDarrick J. Wong 3705a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3706e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 37078c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 3708dec214d0STahsin Erdogan else if (ext4_has_metadata_csum(sb) || ext4_has_feature_ea_inode(sb)) 3709a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3710a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3711a9c47317SDarrick J. Wong 3712ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3713ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3714fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3715617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3716fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 371787f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3718fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3719617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3720fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3721ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3722fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 372303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3724fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 37252e7842b8SHugh Dickins #endif 372698c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 372798c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 372898c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 372998c1a759SDarrick J. Wong 3730617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3731fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3732617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3733fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3734617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3735fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3736ac27a0ecSDave Kleikamp 3737617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3738fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3739bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3740fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3741bb4f397aSAneesh Kumar K.V else 3742fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 374345f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3744fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 37458b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3746fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3747ac27a0ecSDave Kleikamp 374808cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 374908cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 375030773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 375130773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 375230773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3753ac27a0ecSDave Kleikamp 37548b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3755fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3756ac27a0ecSDave Kleikamp 37571e2462f9SMingming Cao /* 3758dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3759dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3760dd919b98SAneesh Kumar K.V */ 3761bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 37628b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3763fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3764dd919b98SAneesh Kumar K.V 376551ce6511SLukas Czerner /* 376651ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 376751ce6511SLukas Czerner * no mount option specified. 376851ce6511SLukas Czerner */ 376951ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 377051ce6511SLukas Czerner 37719803387cSTheodore Ts'o if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 37729803387cSTheodore Ts'o sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 37739803387cSTheodore Ts'o sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 37749803387cSTheodore Ts'o } else { 37759803387cSTheodore Ts'o sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 37769803387cSTheodore Ts'o sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 37779803387cSTheodore Ts'o if (sbi->s_first_ino < EXT4_GOOD_OLD_FIRST_INO) { 37789803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid first ino: %u", 37799803387cSTheodore Ts'o sbi->s_first_ino); 37809803387cSTheodore Ts'o goto failed_mount; 37819803387cSTheodore Ts'o } 37829803387cSTheodore Ts'o if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37839803387cSTheodore Ts'o (!is_power_of_2(sbi->s_inode_size)) || 37849803387cSTheodore Ts'o (sbi->s_inode_size > blocksize)) { 37859803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 37869803387cSTheodore Ts'o "unsupported inode size: %d", 37879803387cSTheodore Ts'o sbi->s_inode_size); 37889803387cSTheodore Ts'o goto failed_mount; 37899803387cSTheodore Ts'o } 37909803387cSTheodore Ts'o /* 37919803387cSTheodore Ts'o * i_atime_extra is the last extra field available for 37929803387cSTheodore Ts'o * [acm]times in struct ext4_inode. Checking for that 37939803387cSTheodore Ts'o * field should suffice to ensure we have extra space 37949803387cSTheodore Ts'o * for all three. 37959803387cSTheodore Ts'o */ 37969803387cSTheodore Ts'o if (sbi->s_inode_size >= offsetof(struct ext4_inode, i_atime_extra) + 37979803387cSTheodore Ts'o sizeof(((struct ext4_inode *)0)->i_atime_extra)) { 37989803387cSTheodore Ts'o sb->s_time_gran = 1; 37999803387cSTheodore Ts'o sb->s_time_max = EXT4_EXTRA_TIMESTAMP_MAX; 38009803387cSTheodore Ts'o } else { 38019803387cSTheodore Ts'o sb->s_time_gran = NSEC_PER_SEC; 38029803387cSTheodore Ts'o sb->s_time_max = EXT4_NON_EXTRA_TIMESTAMP_MAX; 38039803387cSTheodore Ts'o } 38049803387cSTheodore Ts'o sb->s_time_min = EXT4_TIMESTAMP_MIN; 38059803387cSTheodore Ts'o } 38069803387cSTheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 38079803387cSTheodore Ts'o sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 38089803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE; 38099803387cSTheodore Ts'o if (ext4_has_feature_extra_isize(sb)) { 38109803387cSTheodore Ts'o unsigned v, max = (sbi->s_inode_size - 38119803387cSTheodore Ts'o EXT4_GOOD_OLD_INODE_SIZE); 38129803387cSTheodore Ts'o 38139803387cSTheodore Ts'o v = le16_to_cpu(es->s_want_extra_isize); 38149803387cSTheodore Ts'o if (v > max) { 38159803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 38169803387cSTheodore Ts'o "bad s_want_extra_isize: %d", v); 38179803387cSTheodore Ts'o goto failed_mount; 38189803387cSTheodore Ts'o } 38199803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 38209803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 38219803387cSTheodore Ts'o 38229803387cSTheodore Ts'o v = le16_to_cpu(es->s_min_extra_isize); 38239803387cSTheodore Ts'o if (v > max) { 38249803387cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 38259803387cSTheodore Ts'o "bad s_min_extra_isize: %d", v); 38269803387cSTheodore Ts'o goto failed_mount; 38279803387cSTheodore Ts'o } 38289803387cSTheodore Ts'o if (sbi->s_want_extra_isize < v) 38299803387cSTheodore Ts'o sbi->s_want_extra_isize = v; 38309803387cSTheodore Ts'o } 38319803387cSTheodore Ts'o } 38329803387cSTheodore Ts'o 38335aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 38345aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 38355aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 38365aee0f8aSTheodore Ts'o GFP_KERNEL); 38375aee0f8aSTheodore Ts'o if (!s_mount_opts) 38385aee0f8aSTheodore Ts'o goto failed_mount; 38395aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 38405aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 38418b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 38428b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 38435aee0f8aSTheodore Ts'o s_mount_opts); 38445aee0f8aSTheodore Ts'o } 38455aee0f8aSTheodore Ts'o kfree(s_mount_opts); 38468b67f04aSTheodore Ts'o } 38475a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3848b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3849661aa520SEric Sandeen &journal_ioprio, 0)) 3850ac27a0ecSDave Kleikamp goto failed_mount; 3851ac27a0ecSDave Kleikamp 3852c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 3853c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_casefold(sb) && !sbi->s_encoding) { 3854c83ad55eSGabriel Krisman Bertazi const struct ext4_sb_encodings *encoding_info; 3855c83ad55eSGabriel Krisman Bertazi struct unicode_map *encoding; 3856c83ad55eSGabriel Krisman Bertazi __u16 encoding_flags; 3857c83ad55eSGabriel Krisman Bertazi 3858c83ad55eSGabriel Krisman Bertazi if (ext4_has_feature_encrypt(sb)) { 3859c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3860c83ad55eSGabriel Krisman Bertazi "Can't mount with encoding and encryption"); 3861c83ad55eSGabriel Krisman Bertazi goto failed_mount; 3862c83ad55eSGabriel Krisman Bertazi } 3863c83ad55eSGabriel Krisman Bertazi 3864c83ad55eSGabriel Krisman Bertazi if (ext4_sb_read_encoding(es, &encoding_info, 3865c83ad55eSGabriel Krisman Bertazi &encoding_flags)) { 3866c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3867c83ad55eSGabriel Krisman Bertazi "Encoding requested by superblock is unknown"); 3868c83ad55eSGabriel Krisman Bertazi goto failed_mount; 3869c83ad55eSGabriel Krisman Bertazi } 3870c83ad55eSGabriel Krisman Bertazi 3871c83ad55eSGabriel Krisman Bertazi encoding = utf8_load(encoding_info->version); 3872c83ad55eSGabriel Krisman Bertazi if (IS_ERR(encoding)) { 3873c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_ERR, 3874c83ad55eSGabriel Krisman Bertazi "can't mount with superblock charset: %s-%s " 3875c83ad55eSGabriel Krisman Bertazi "not supported by the kernel. flags: 0x%x.", 3876c83ad55eSGabriel Krisman Bertazi encoding_info->name, encoding_info->version, 3877c83ad55eSGabriel Krisman Bertazi encoding_flags); 3878c83ad55eSGabriel Krisman Bertazi goto failed_mount; 3879c83ad55eSGabriel Krisman Bertazi } 3880c83ad55eSGabriel Krisman Bertazi ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: " 3881c83ad55eSGabriel Krisman Bertazi "%s-%s with flags 0x%hx", encoding_info->name, 3882c83ad55eSGabriel Krisman Bertazi encoding_info->version?:"\b", encoding_flags); 3883c83ad55eSGabriel Krisman Bertazi 3884c83ad55eSGabriel Krisman Bertazi sbi->s_encoding = encoding; 3885c83ad55eSGabriel Krisman Bertazi sbi->s_encoding_flags = encoding_flags; 3886c83ad55eSGabriel Krisman Bertazi } 3887c83ad55eSGabriel Krisman Bertazi #endif 3888c83ad55eSGabriel Krisman Bertazi 388956889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 389056889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 389156889787STheodore Ts'o "with data=journal disables delayed " 389256889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 389356889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 389456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 389556889787STheodore Ts'o "both data=journal and delalloc"); 389656889787STheodore Ts'o goto failed_mount; 389756889787STheodore Ts'o } 389856889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 389956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 39006ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 390156889787STheodore Ts'o goto failed_mount; 390256889787STheodore Ts'o } 3903923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3904923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3905923ae0ffSRoss Zwisler "both data=journal and dax"); 3906923ae0ffSRoss Zwisler goto failed_mount; 3907923ae0ffSRoss Zwisler } 390873b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 390973b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 391073b92a2aSSergey Karamov "encrypted files will use data=ordered " 391173b92a2aSSergey Karamov "instead of data journaling mode"); 391273b92a2aSSergey Karamov } 391356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 391456889787STheodore Ts'o clear_opt(sb, DELALLOC); 3915001e4a87STejun Heo } else { 3916001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 391756889787STheodore Ts'o } 391856889787STheodore Ts'o 39191751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 39201751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 3921ac27a0ecSDave Kleikamp 3922617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3923e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3924e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3925e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3926b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3927b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3928b31e1552SEric Sandeen "running e2fsck is recommended"); 3929469108ffSTheodore Tso 3930ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3931ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3932e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3933ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3934ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3935ed3654ebSTheodore Ts'o goto failed_mount; 3936ed3654ebSTheodore Ts'o } 3937dec214d0STahsin Erdogan 3938dec214d0STahsin Erdogan /* 3939dec214d0STahsin Erdogan * ea_inode feature uses l_i_version field which is not 3940dec214d0STahsin Erdogan * available in HURD_COMPAT mode. 3941dec214d0STahsin Erdogan */ 3942dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 3943dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 3944dec214d0STahsin Erdogan "ea_inode feature is not supported for Hurd"); 3945dec214d0STahsin Erdogan goto failed_mount; 3946dec214d0STahsin Erdogan } 3947ed3654ebSTheodore Ts'o } 3948ed3654ebSTheodore Ts'o 39492035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 39502035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 39512035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 39522035e776STheodore Ts'o "using the ext4 subsystem"); 39532035e776STheodore Ts'o else { 39540d9366d6SEric Sandeen /* 39550d9366d6SEric Sandeen * If we're probing be silent, if this looks like 39560d9366d6SEric Sandeen * it's actually an ext[34] filesystem. 39570d9366d6SEric Sandeen */ 39580d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 39590d9366d6SEric Sandeen goto failed_mount; 39602035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 39612035e776STheodore Ts'o "to feature incompatibilities"); 39622035e776STheodore Ts'o goto failed_mount; 39632035e776STheodore Ts'o } 39642035e776STheodore Ts'o } 39652035e776STheodore Ts'o 39662035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 39672035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 39682035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 39692035e776STheodore Ts'o "using the ext4 subsystem"); 39702035e776STheodore Ts'o else { 39710d9366d6SEric Sandeen /* 39720d9366d6SEric Sandeen * If we're probing be silent, if this looks like 39730d9366d6SEric Sandeen * it's actually an ext4 filesystem. 39740d9366d6SEric Sandeen */ 39750d9366d6SEric Sandeen if (silent && ext4_feature_set_ok(sb, sb_rdonly(sb))) 39760d9366d6SEric Sandeen goto failed_mount; 39772035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 39782035e776STheodore Ts'o "to feature incompatibilities"); 39792035e776STheodore Ts'o goto failed_mount; 39802035e776STheodore Ts'o } 39812035e776STheodore Ts'o } 39822035e776STheodore Ts'o 3983469108ffSTheodore Tso /* 3984ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3985ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3986ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3987ac27a0ecSDave Kleikamp */ 3988bc98a42cSDavid Howells if (!ext4_feature_set_ok(sb, (sb_rdonly(sb)))) 3989ac27a0ecSDave Kleikamp goto failed_mount; 3990a13fb1a4SEric Sandeen 3991261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3992617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3993617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3994b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 39958cdf3372STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 39968cdf3372STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 39978cdf3372STheodore Ts'o goto failed_mount; 39988cdf3372STheodore Ts'o } 39998cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 40008cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 40018cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 40028cdf3372STheodore Ts'o "Invalid log block size: %u", 40038cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 4004ac27a0ecSDave Kleikamp goto failed_mount; 4005ac27a0ecSDave Kleikamp } 4006bfe0a5f4STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 4007bfe0a5f4STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 4008bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4009bfe0a5f4STheodore Ts'o "Invalid log cluster size: %u", 4010bfe0a5f4STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 4011bfe0a5f4STheodore Ts'o goto failed_mount; 4012bfe0a5f4STheodore Ts'o } 4013ac27a0ecSDave Kleikamp 40145b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 40155b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 40165b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 40175b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 40185b9554dcSTheodore Ts'o goto failed_mount; 40195b9554dcSTheodore Ts'o } 40205b9554dcSTheodore Ts'o 4021923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 4022559db4c6SRoss Zwisler if (ext4_has_feature_inline_data(sb)) { 4023559db4c6SRoss Zwisler ext4_msg(sb, KERN_ERR, "Cannot use DAX on a filesystem" 4024559db4c6SRoss Zwisler " that may contain inline data"); 4025361d24d4SEric Sandeen goto failed_mount; 4026559db4c6SRoss Zwisler } 402780660f20SDave Jiang if (!bdev_dax_supported(sb->s_bdev, blocksize)) { 402824f3478dSDan Williams ext4_msg(sb, KERN_ERR, 4029361d24d4SEric Sandeen "DAX unsupported by block device."); 4030361d24d4SEric Sandeen goto failed_mount; 403124f3478dSDan Williams } 4032923ae0ffSRoss Zwisler } 4033923ae0ffSRoss Zwisler 4034e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 40356ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 40366ddb2447STheodore Ts'o es->s_encryption_level); 40376ddb2447STheodore Ts'o goto failed_mount; 40386ddb2447STheodore Ts'o } 40396ddb2447STheodore Ts'o 4040ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 4041ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 4042ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 4043b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 4044ce40733cSAneesh Kumar K.V blocksize); 4045ac27a0ecSDave Kleikamp goto failed_mount; 4046ac27a0ecSDave Kleikamp } 4047ac27a0ecSDave Kleikamp 4048ac27a0ecSDave Kleikamp brelse(bh); 404970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 405070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 4051a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 4052ac27a0ecSDave Kleikamp if (!bh) { 4053b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4054b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 4055ac27a0ecSDave Kleikamp goto failed_mount; 4056ac27a0ecSDave Kleikamp } 40572716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 4058ac27a0ecSDave Kleikamp sbi->s_es = es; 4059617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 4060b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4061b31e1552SEric Sandeen "Magic mismatch, very weird!"); 4062ac27a0ecSDave Kleikamp goto failed_mount; 4063ac27a0ecSDave Kleikamp } 4064ac27a0ecSDave Kleikamp } 4065ac27a0ecSDave Kleikamp 4066e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 4067f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 4068f287a1a5STheodore Ts'o has_huge_files); 4069f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 4070ac27a0ecSDave Kleikamp 40710d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 4072e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 40738fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 40740d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 4075d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 4076b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4077b31e1552SEric Sandeen "unsupported descriptor size %lu", 40780d1ee42fSAlexandre Ratchov sbi->s_desc_size); 40790d1ee42fSAlexandre Ratchov goto failed_mount; 40800d1ee42fSAlexandre Ratchov } 40810d1ee42fSAlexandre Ratchov } else 40820d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 40830b8e58a1SAndreas Dilger 4084ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 4085ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 40860b8e58a1SAndreas Dilger 4087617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 4088ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 4089617ba13bSMingming Cao goto cantfind_ext4; 4090cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 4091cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 4092cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 4093cd6bb35bSTheodore Ts'o sbi->s_blocks_per_group); 4094cd6bb35bSTheodore Ts'o goto failed_mount; 4095cd6bb35bSTheodore Ts'o } 4096ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 4097ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 40980d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 4099ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 4100ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4101e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 4102e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 41030b8e58a1SAndreas Dilger 4104ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 4105ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 4106ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 4107e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 4108f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 4109f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 4110f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4111f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 4112f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 4113bc98a42cSDavid Howells if (!sb_rdonly(sb)) 411423301410STheodore Ts'o es->s_flags |= 411523301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 4116f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 4117f99b2589STheodore Ts'o #else 4118bc98a42cSDavid Howells if (!sb_rdonly(sb)) 411923301410STheodore Ts'o es->s_flags |= 412023301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 4121f99b2589STheodore Ts'o #endif 4122f99b2589STheodore Ts'o } 412323301410STheodore Ts'o } 4124ac27a0ecSDave Kleikamp 4125281b5995STheodore Ts'o /* Handle clustersize */ 4126281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 4127e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 4128281b5995STheodore Ts'o if (has_bigalloc) { 4129281b5995STheodore Ts'o if (clustersize < blocksize) { 4130281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4131281b5995STheodore Ts'o "cluster size (%d) smaller than " 4132281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 4133281b5995STheodore Ts'o goto failed_mount; 4134281b5995STheodore Ts'o } 4135281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 4136281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 4137281b5995STheodore Ts'o sbi->s_clusters_per_group = 4138281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 4139281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 4140281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 4141281b5995STheodore Ts'o "#clusters per group too big: %lu", 4142281b5995STheodore Ts'o sbi->s_clusters_per_group); 4143281b5995STheodore Ts'o goto failed_mount; 4144281b5995STheodore Ts'o } 4145281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 4146281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 4147281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 4148281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 4149281b5995STheodore Ts'o sbi->s_blocks_per_group, 4150281b5995STheodore Ts'o sbi->s_clusters_per_group); 4151281b5995STheodore Ts'o goto failed_mount; 4152281b5995STheodore Ts'o } 4153281b5995STheodore Ts'o } else { 4154281b5995STheodore Ts'o if (clustersize != blocksize) { 4155bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_ERR, 4156bfe0a5f4STheodore Ts'o "fragment/cluster size (%d) != " 4157bfe0a5f4STheodore Ts'o "block size (%d)", clustersize, blocksize); 4158bfe0a5f4STheodore Ts'o goto failed_mount; 4159281b5995STheodore Ts'o } 4160ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 4161b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4162b31e1552SEric Sandeen "#blocks per group too big: %lu", 4163ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 4164ac27a0ecSDave Kleikamp goto failed_mount; 4165ac27a0ecSDave Kleikamp } 4166281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 4167281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 4168281b5995STheodore Ts'o } 4169281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 4170281b5995STheodore Ts'o 4171960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 4172960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 4173960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 4174960fd856STheodore Ts'o 4175bf43d84bSEric Sandeen /* 4176bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 4177bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 4178bf43d84bSEric Sandeen */ 41795a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 418030ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 41815a9ae68aSDarrick J. Wong if (err) { 4182b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 4183bf43d84bSEric Sandeen " too large to mount safely on this system"); 4184ac27a0ecSDave Kleikamp goto failed_mount; 4185ac27a0ecSDave Kleikamp } 4186ac27a0ecSDave Kleikamp 4187617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 4188617ba13bSMingming Cao goto cantfind_ext4; 4189e7c95593SEric Sandeen 41900f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 41910f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 41920f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 4193b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 4194b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 41950f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 41960f2ddca6SFrom: Thiemo Nagel goto failed_mount; 41970f2ddca6SFrom: Thiemo Nagel } 41980f2ddca6SFrom: Thiemo Nagel 41994ec11028STheodore Ts'o /* 42004ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 42014ec11028STheodore Ts'o * of the filesystem. 42024ec11028STheodore Ts'o */ 42034ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 4204b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4205b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 4206e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 42074ec11028STheodore Ts'o ext4_blocks_count(es)); 4208e7c95593SEric Sandeen goto failed_mount; 4209e7c95593SEric Sandeen } 4210bfe0a5f4STheodore Ts'o if ((es->s_first_data_block == 0) && (es->s_log_block_size == 0) && 4211bfe0a5f4STheodore Ts'o (sbi->s_cluster_ratio == 1)) { 4212bfe0a5f4STheodore Ts'o ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 4213bfe0a5f4STheodore Ts'o "block is 0 with a 1k block and cluster size"); 4214bfe0a5f4STheodore Ts'o goto failed_mount; 4215bfe0a5f4STheodore Ts'o } 4216bfe0a5f4STheodore Ts'o 4217bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 4218bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 4219bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 4220bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 42214ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 4222b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 42234ec11028STheodore Ts'o "(block count %llu, first data block %u, " 4224b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 42254ec11028STheodore Ts'o ext4_blocks_count(es), 42264ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 42274ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 42284ec11028STheodore Ts'o goto failed_mount; 42294ec11028STheodore Ts'o } 4230bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 4231fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 4232fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 42339e463084STheodore Ts'o if (((u64)sbi->s_groups_count * sbi->s_inodes_per_group) != 42349e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count)) { 42359e463084STheodore Ts'o ext4_msg(sb, KERN_ERR, "inodes count not valid: %u vs %llu", 42369e463084STheodore Ts'o le32_to_cpu(es->s_inodes_count), 42379e463084STheodore Ts'o ((u64)sbi->s_groups_count * sbi->s_inodes_per_group)); 42389e463084STheodore Ts'o ret = -EINVAL; 42399e463084STheodore Ts'o goto failed_mount; 42409e463084STheodore Ts'o } 4241617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 4242617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 42433a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 42442ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 42453a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 42463a4b77cdSEryu Guan "first meta block group too large: %u " 42473a4b77cdSEryu Guan "(group descriptor block count %u)", 42483a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 42493a4b77cdSEryu Guan goto failed_mount; 42503a4b77cdSEryu Guan } 42513a4b77cdSEryu Guan } 4252344476e1SKees Cook sbi->s_group_desc = kvmalloc_array(db_count, 4253f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 4254ac27a0ecSDave Kleikamp GFP_KERNEL); 4255ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 4256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 42572cde417dSTheodore Ts'o ret = -ENOMEM; 4258ac27a0ecSDave Kleikamp goto failed_mount; 4259ac27a0ecSDave Kleikamp } 4260ac27a0ecSDave Kleikamp 4261705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 4262ac27a0ecSDave Kleikamp 426385c8f176SAndrew Perepechko /* Pre-read the descriptors into the buffer cache */ 426485c8f176SAndrew Perepechko for (i = 0; i < db_count; i++) { 426585c8f176SAndrew Perepechko block = descriptor_loc(sb, logical_sb_block, i); 426685c8f176SAndrew Perepechko sb_breadahead(sb, block); 426785c8f176SAndrew Perepechko } 426885c8f176SAndrew Perepechko 4269ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 427070bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 4271a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 4272ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 4273b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4274b31e1552SEric Sandeen "can't read group descriptor %d", i); 4275ac27a0ecSDave Kleikamp db_count = i; 4276ac27a0ecSDave Kleikamp goto failed_mount2; 4277ac27a0ecSDave Kleikamp } 4278ac27a0ecSDave Kleikamp } 427944de022cSTheodore Ts'o sbi->s_gdb_count = db_count; 4280829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 4281b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 42826a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 4283f9ae9cf5STheodore Ts'o goto failed_mount2; 4284ac27a0ecSDave Kleikamp } 4285772cb7c8SJose R. Santos 4286235699a8SKees Cook timer_setup(&sbi->s_err_report, print_daily_error_info, 0); 428704496411STao Ma 4288a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 4289eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 4290ce7e010aSTheodore Ts'o goto failed_mount3; 4291ce7e010aSTheodore Ts'o 4292c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 429367a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 4294c9de560dSAlex Tomas 4295f9ae9cf5STheodore Ts'o /* 4296f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 4297f9ae9cf5STheodore Ts'o */ 4298f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 4299617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 4300617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 4301643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 4302a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 4303ffcc4182SEric Biggers #endif 4304c93d8f88SEric Biggers #ifdef CONFIG_FS_VERITY 4305c93d8f88SEric Biggers sb->s_vop = &ext4_verityops; 4306c93d8f88SEric Biggers #endif 4307ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4308617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 4309e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 43101fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 4311262b4662SJan Kara else 4312262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 4313689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 4314ac27a0ecSDave Kleikamp #endif 431585787090SChristoph Hellwig memcpy(&sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 4316f2fa2ffcSAneesh Kumar K.V 4317ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 43183b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 4319ac27a0ecSDave Kleikamp 4320ac27a0ecSDave Kleikamp sb->s_root = NULL; 4321ac27a0ecSDave Kleikamp 4322ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 4323e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 4324ac27a0ecSDave Kleikamp 4325bc98a42cSDavid Howells if (ext4_has_feature_mmp(sb) && !sb_rdonly(sb)) 4326c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 432750460fe8SDarrick J. Wong goto failed_mount3a; 4328c5e06d10SJohann Lombardi 4329ac27a0ecSDave Kleikamp /* 4330ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 4331ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 4332ac27a0ecSDave Kleikamp */ 4333e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 43344753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 43354753d8a2STheodore Ts'o if (err) 433650460fe8SDarrick J. Wong goto failed_mount3a; 4337bc98a42cSDavid Howells } else if (test_opt(sb, NOLOAD) && !sb_rdonly(sb) && 4338e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 4339b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4340b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4341744692dcSJiaying Zhang goto failed_mount_wq; 4342ac27a0ecSDave Kleikamp } else { 43431e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 43441e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 43451e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 43461e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 43471e381f60SDmitry Monakhov goto failed_mount_wq; 43481e381f60SDmitry Monakhov } 43491e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 43501e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 43511e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 43521e381f60SDmitry Monakhov goto failed_mount_wq; 43531e381f60SDmitry Monakhov } 43541e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 43551e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 43561e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 43571e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 43581e381f60SDmitry Monakhov goto failed_mount_wq; 43591e381f60SDmitry Monakhov } 43601e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 43611e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 43621e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 43631e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 43641e381f60SDmitry Monakhov goto failed_mount_wq; 43651e381f60SDmitry Monakhov } 436650b29d8fSDebabrata Banerjee sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM; 43671e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4368fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 43690390131bSFrank Mayhar sbi->s_journal = NULL; 43700390131bSFrank Mayhar needs_recovery = 0; 43710390131bSFrank Mayhar goto no_journal; 4372ac27a0ecSDave Kleikamp } 4373ac27a0ecSDave Kleikamp 4374e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4375eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4376eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4377b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4378744692dcSJiaying Zhang goto failed_mount_wq; 4379eb40a09cSJose R. Santos } 4380eb40a09cSJose R. Santos 438125ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 438225ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 438325ed6e8aSDarrick J. Wong "feature set"); 438425ed6e8aSDarrick J. Wong goto failed_mount_wq; 4385d4da6c9cSLinus Torvalds } 4386818d276cSGirish Shilamkar 4387ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4388ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4389ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4390ac27a0ecSDave Kleikamp case 0: 4391ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 439263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 439363f57933SAndrew Morton * cope, else JOURNAL_DATA 439463f57933SAndrew Morton */ 4395dab291afSMingming Cao if (jbd2_journal_check_available_features 439627f394a7STyson Nottingham (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4397fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 439827f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 439927f394a7STyson Nottingham } else { 4400fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 440127f394a7STyson Nottingham sbi->s_def_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 440227f394a7STyson Nottingham } 4403ac27a0ecSDave Kleikamp break; 4404ac27a0ecSDave Kleikamp 4405617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4406617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4407dab291afSMingming Cao if (!jbd2_journal_check_available_features 4408dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4409b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4410b31e1552SEric Sandeen "requested data journaling mode"); 4411744692dcSJiaying Zhang goto failed_mount_wq; 4412ac27a0ecSDave Kleikamp } 4413ac27a0ecSDave Kleikamp default: 4414ac27a0ecSDave Kleikamp break; 4415ac27a0ecSDave Kleikamp } 4416ab04df78SJan Kara 4417ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4418ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4419ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4420ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4421ab04df78SJan Kara goto failed_mount_wq; 4422ab04df78SJan Kara } 4423ab04df78SJan Kara 4424b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4425ac27a0ecSDave Kleikamp 442618aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 442718aadd47SBobi Jam 4428ce7e010aSTheodore Ts'o no_journal: 4429cdb7ee4cSTahsin Erdogan if (!test_opt(sb, NO_MBCACHE)) { 443047387409STahsin Erdogan sbi->s_ea_block_cache = ext4_xattr_create_cache(); 443147387409STahsin Erdogan if (!sbi->s_ea_block_cache) { 4432cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, 4433cdb7ee4cSTahsin Erdogan "Failed to create ea_block_cache"); 44349c191f70ST Makphaibulchoke goto failed_mount_wq; 44359c191f70ST Makphaibulchoke } 44369c191f70ST Makphaibulchoke 4437dec214d0STahsin Erdogan if (ext4_has_feature_ea_inode(sb)) { 4438dec214d0STahsin Erdogan sbi->s_ea_inode_cache = ext4_xattr_create_cache(); 4439dec214d0STahsin Erdogan if (!sbi->s_ea_inode_cache) { 4440dec214d0STahsin Erdogan ext4_msg(sb, KERN_ERR, 4441dec214d0STahsin Erdogan "Failed to create ea_inode_cache"); 4442dec214d0STahsin Erdogan goto failed_mount_wq; 4443dec214d0STahsin Erdogan } 4444dec214d0STahsin Erdogan } 4445cdb7ee4cSTahsin Erdogan } 4446dec214d0STahsin Erdogan 4447c93d8f88SEric Biggers if (ext4_has_feature_verity(sb) && blocksize != PAGE_SIZE) { 4448c93d8f88SEric Biggers ext4_msg(sb, KERN_ERR, "Unsupported blocksize for fs-verity"); 4449c93d8f88SEric Biggers goto failed_mount_wq; 4450c93d8f88SEric Biggers } 4451c93d8f88SEric Biggers 4452bc98a42cSDavid Howells if (DUMMY_ENCRYPTION_ENABLED(sbi) && !sb_rdonly(sb) && 4453e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4454e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 44556ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 44566ddb2447STheodore Ts'o } 44576ddb2447STheodore Ts'o 4458fd89d5f2STejun Heo /* 4459952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4460952fc18eSTheodore Ts'o * superblock if present. 4461952fc18eSTheodore Ts'o */ 4462952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4463952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4464952fc18eSTheodore Ts'o else { 446507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 446607aa2ea1SLukas Czerner if (err) 4467952fc18eSTheodore Ts'o goto failed_mount_wq; 4468952fc18eSTheodore Ts'o } 4469952fc18eSTheodore Ts'o 4470952fc18eSTheodore Ts'o /* 4471fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4472fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4473fd89d5f2STejun Heo */ 44742e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 44752e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 44762e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 44772e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 447807aa2ea1SLukas Czerner ret = -ENOMEM; 44792e8fa54eSJan Kara goto failed_mount4; 44802e8fa54eSJan Kara } 44812e8fa54eSJan Kara 4482ac27a0ecSDave Kleikamp /* 4483dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4484ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4485ac27a0ecSDave Kleikamp */ 4486ac27a0ecSDave Kleikamp 44878a363970STheodore Ts'o root = ext4_iget(sb, EXT4_ROOT_INO, EXT4_IGET_SPECIAL); 44881d1fe1eeSDavid Howells if (IS_ERR(root)) { 4489b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 44901d1fe1eeSDavid Howells ret = PTR_ERR(root); 449132a9bb57SManish Katiyar root = NULL; 4492ac27a0ecSDave Kleikamp goto failed_mount4; 4493ac27a0ecSDave Kleikamp } 4494ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4495b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 449694bf608aSAl Viro iput(root); 4497ac27a0ecSDave Kleikamp goto failed_mount4; 4498ac27a0ecSDave Kleikamp } 4499b886ee3eSGabriel Krisman Bertazi 4500b886ee3eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4501b886ee3eSGabriel Krisman Bertazi if (sbi->s_encoding) 4502b886ee3eSGabriel Krisman Bertazi sb->s_d_op = &ext4_dentry_ops; 4503b886ee3eSGabriel Krisman Bertazi #endif 4504b886ee3eSGabriel Krisman Bertazi 450548fde701SAl Viro sb->s_root = d_make_root(root); 45061d1fe1eeSDavid Howells if (!sb->s_root) { 4507b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 45081d1fe1eeSDavid Howells ret = -ENOMEM; 45091d1fe1eeSDavid Howells goto failed_mount4; 45101d1fe1eeSDavid Howells } 4511ac27a0ecSDave Kleikamp 4512c89128a0SJaegeuk Kim ret = ext4_setup_super(sb, es, sb_rdonly(sb)); 4513c89128a0SJaegeuk Kim if (ret == -EROFS) { 45141751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 4515c89128a0SJaegeuk Kim ret = 0; 4516c89128a0SJaegeuk Kim } else if (ret) 4517c89128a0SJaegeuk Kim goto failed_mount4a; 4518ef7f3835SKalpak Shah 4519b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 452027dd4385SLukas Czerner 45216fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 45226fd058f7STheodore Ts'o if (err) { 4523b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4524fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4525f9ae9cf5STheodore Ts'o goto failed_mount4a; 4526f9ae9cf5STheodore Ts'o } 4527f9ae9cf5STheodore Ts'o 4528f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4529f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4530f9ae9cf5STheodore Ts'o if (err) { 4531f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4532f9ae9cf5STheodore Ts'o err); 4533dcf2d804STao Ma goto failed_mount5; 4534c2774d84SAneesh Kumar K.V } 4535c2774d84SAneesh Kumar K.V 4536d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4537d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4538d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 45394274f516STheodore Ts'o ext4_superblock_csum_set(sb); 4540908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4541908c7f19STejun Heo GFP_KERNEL); 4542d5e03cbbSTheodore Ts'o if (!err) { 4543d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4544d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 45454274f516STheodore Ts'o ext4_superblock_csum_set(sb); 4546908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4547908c7f19STejun Heo GFP_KERNEL); 4548d5e03cbbSTheodore Ts'o } 4549d5e03cbbSTheodore Ts'o if (!err) 4550d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4551908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4552d5e03cbbSTheodore Ts'o if (!err) 4553908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4554908c7f19STejun Heo GFP_KERNEL); 4555c8585c6fSDaeho Jeong if (!err) 4556c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4557c8585c6fSDaeho Jeong 4558d5e03cbbSTheodore Ts'o if (err) { 4559d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4560d5e03cbbSTheodore Ts'o goto failed_mount6; 4561d5e03cbbSTheodore Ts'o } 4562d5e03cbbSTheodore Ts'o 4563e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4564d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4565d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4566d5e03cbbSTheodore Ts'o "unable to initialize " 4567d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4568d5e03cbbSTheodore Ts'o goto failed_mount6; 4569d5e03cbbSTheodore Ts'o } 4570d5e03cbbSTheodore Ts'o 4571bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4572bfff6873SLukas Czerner if (err) 4573dcf2d804STao Ma goto failed_mount6; 4574bfff6873SLukas Czerner 4575b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4576dcf2d804STao Ma if (err) 4577dcf2d804STao Ma goto failed_mount7; 45783197ebdbSTheodore Ts'o 45799b2ff357SJan Kara #ifdef CONFIG_QUOTA 45809b2ff357SJan Kara /* Enable quota usage during mount. */ 4581bc98a42cSDavid Howells if (ext4_has_feature_quota(sb) && !sb_rdonly(sb)) { 45829b2ff357SJan Kara err = ext4_enable_quotas(sb); 45839b2ff357SJan Kara if (err) 45849b2ff357SJan Kara goto failed_mount8; 45859b2ff357SJan Kara } 45869b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 45879b2ff357SJan Kara 4588617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4589617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4590617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 45910390131bSFrank Mayhar if (needs_recovery) { 4592b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4593617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 45940390131bSFrank Mayhar } 45950390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 45960390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 45970390131bSFrank Mayhar descr = " journalled data mode"; 45980390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 45990390131bSFrank Mayhar descr = " ordered data mode"; 46000390131bSFrank Mayhar else 46010390131bSFrank Mayhar descr = " writeback data mode"; 46020390131bSFrank Mayhar } else 46030390131bSFrank Mayhar descr = "out journal"; 46040390131bSFrank Mayhar 460579add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 460679add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 460779add3a3SLukas Czerner if (!blk_queue_discard(q)) 460879add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 460979add3a3SLukas Czerner "mounting with \"discard\" option, but " 461079add3a3SLukas Czerner "the device does not support discard"); 461179add3a3SLukas Czerner } 461279add3a3SLukas Czerner 4613e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4614d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 46155aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 46165aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 46175aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 46188b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4619ac27a0ecSDave Kleikamp 462066e61a9eSTheodore Ts'o if (es->s_error_count) 462166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4622ac27a0ecSDave Kleikamp 4623efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4624efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4625efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4626efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4627efbed4dcSTheodore Ts'o 4628d4c402d9SCurt Wohlgemuth kfree(orig_data); 4629ac27a0ecSDave Kleikamp return 0; 4630ac27a0ecSDave Kleikamp 4631617ba13bSMingming Cao cantfind_ext4: 4632ac27a0ecSDave Kleikamp if (!silent) 4633b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4634ac27a0ecSDave Kleikamp goto failed_mount; 4635ac27a0ecSDave Kleikamp 463672ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 463772ba7450STheodore Ts'o failed_mount8: 4638ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 463972ba7450STheodore Ts'o #endif 4640dcf2d804STao Ma failed_mount7: 4641dcf2d804STao Ma ext4_unregister_li_request(sb); 4642dcf2d804STao Ma failed_mount6: 4643f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4644d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4645b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4646d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4647d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4648d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4649d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 4650af18e35bSVasily Averin percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 465100764937SAzat Khuzhin failed_mount5: 4652f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4653f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4654f9ae9cf5STheodore Ts'o failed_mount4a: 465594bf608aSAl Viro dput(sb->s_root); 465632a9bb57SManish Katiyar sb->s_root = NULL; 465794bf608aSAl Viro failed_mount4: 4658b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 46592e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 46602e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 46614c0425ffSMingming Cao failed_mount_wq: 4662dec214d0STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_inode_cache); 4663dec214d0STahsin Erdogan sbi->s_ea_inode_cache = NULL; 466450c15df6SChengguang Xu 466547387409STahsin Erdogan ext4_xattr_destroy_cache(sbi->s_ea_block_cache); 466647387409STahsin Erdogan sbi->s_ea_block_cache = NULL; 466750c15df6SChengguang Xu 46680390131bSFrank Mayhar if (sbi->s_journal) { 4669dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 467047b4a50bSJan Kara sbi->s_journal = NULL; 46710390131bSFrank Mayhar } 467250460fe8SDarrick J. Wong failed_mount3a: 4673d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4674eb68d0e2SZheng Liu failed_mount3: 46759105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4676c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4677c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4678ac27a0ecSDave Kleikamp failed_mount2: 4679ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4680ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4681b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4682ac27a0ecSDave Kleikamp failed_mount: 46830441984aSDarrick J. Wong if (sbi->s_chksum_driver) 46840441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4685c83ad55eSGabriel Krisman Bertazi 4686c83ad55eSGabriel Krisman Bertazi #ifdef CONFIG_UNICODE 4687c83ad55eSGabriel Krisman Bertazi utf8_unload(sbi->s_encoding); 4688c83ad55eSGabriel Krisman Bertazi #endif 4689c83ad55eSGabriel Krisman Bertazi 4690ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4691a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 46920ba33facSTheodore Ts'o kfree(get_qf_name(sb, sbi, i)); 4693ac27a0ecSDave Kleikamp #endif 4694617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4695ac27a0ecSDave Kleikamp brelse(bh); 4696ac27a0ecSDave Kleikamp out_fail: 4697ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4698f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 46995aee0f8aSTheodore Ts'o out_free_base: 4700ac27a0ecSDave Kleikamp kfree(sbi); 4701d4c402d9SCurt Wohlgemuth kfree(orig_data); 47025e405595SDan Williams fs_put_dax(dax_dev); 470307aa2ea1SLukas Czerner return err ? err : ret; 4704ac27a0ecSDave Kleikamp } 4705ac27a0ecSDave Kleikamp 4706ac27a0ecSDave Kleikamp /* 4707ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4708ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4709ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4710ac27a0ecSDave Kleikamp */ 4711617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4712ac27a0ecSDave Kleikamp { 4713617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4714ac27a0ecSDave Kleikamp 4715ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 471630773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 471730773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4718ac27a0ecSDave Kleikamp 4719a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4720ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4721dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4722ac27a0ecSDave Kleikamp else 4723dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 47245bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 47255bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 47265bf5683aSHidehiro Kawai else 47275bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4728a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4729ac27a0ecSDave Kleikamp } 4730ac27a0ecSDave Kleikamp 4731c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4732ac27a0ecSDave Kleikamp unsigned int journal_inum) 4733ac27a0ecSDave Kleikamp { 4734ac27a0ecSDave Kleikamp struct inode *journal_inode; 4735ac27a0ecSDave Kleikamp 4736c6cb7e77SEric Whitney /* 4737c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4738c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4739c6cb7e77SEric Whitney * will try to delete it. 4740c6cb7e77SEric Whitney */ 47418a363970STheodore Ts'o journal_inode = ext4_iget(sb, journal_inum, EXT4_IGET_SPECIAL); 47421d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4743b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4744ac27a0ecSDave Kleikamp return NULL; 4745ac27a0ecSDave Kleikamp } 4746ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4747ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4748ac27a0ecSDave Kleikamp iput(journal_inode); 4749b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4750ac27a0ecSDave Kleikamp return NULL; 4751ac27a0ecSDave Kleikamp } 4752ac27a0ecSDave Kleikamp 4753e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4754ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 47551d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4756b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4757ac27a0ecSDave Kleikamp iput(journal_inode); 4758ac27a0ecSDave Kleikamp return NULL; 4759ac27a0ecSDave Kleikamp } 4760c6cb7e77SEric Whitney return journal_inode; 4761c6cb7e77SEric Whitney } 4762c6cb7e77SEric Whitney 4763c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4764c6cb7e77SEric Whitney unsigned int journal_inum) 4765c6cb7e77SEric Whitney { 4766c6cb7e77SEric Whitney struct inode *journal_inode; 4767c6cb7e77SEric Whitney journal_t *journal; 4768c6cb7e77SEric Whitney 4769c6cb7e77SEric Whitney BUG_ON(!ext4_has_feature_journal(sb)); 4770c6cb7e77SEric Whitney 4771c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4772c6cb7e77SEric Whitney if (!journal_inode) 4773c6cb7e77SEric Whitney return NULL; 4774ac27a0ecSDave Kleikamp 4775dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4776ac27a0ecSDave Kleikamp if (!journal) { 4777b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4778ac27a0ecSDave Kleikamp iput(journal_inode); 4779ac27a0ecSDave Kleikamp return NULL; 4780ac27a0ecSDave Kleikamp } 4781ac27a0ecSDave Kleikamp journal->j_private = sb; 4782617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4783ac27a0ecSDave Kleikamp return journal; 4784ac27a0ecSDave Kleikamp } 4785ac27a0ecSDave Kleikamp 4786617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4787ac27a0ecSDave Kleikamp dev_t j_dev) 4788ac27a0ecSDave Kleikamp { 4789ac27a0ecSDave Kleikamp struct buffer_head *bh; 4790ac27a0ecSDave Kleikamp journal_t *journal; 4791617ba13bSMingming Cao ext4_fsblk_t start; 4792617ba13bSMingming Cao ext4_fsblk_t len; 4793ac27a0ecSDave Kleikamp int hblock, blocksize; 4794617ba13bSMingming Cao ext4_fsblk_t sb_block; 4795ac27a0ecSDave Kleikamp unsigned long offset; 4796617ba13bSMingming Cao struct ext4_super_block *es; 4797ac27a0ecSDave Kleikamp struct block_device *bdev; 4798ac27a0ecSDave Kleikamp 4799e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 48000390131bSFrank Mayhar 4801b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4802ac27a0ecSDave Kleikamp if (bdev == NULL) 4803ac27a0ecSDave Kleikamp return NULL; 4804ac27a0ecSDave Kleikamp 4805ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4806e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4807ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4808b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4809b31e1552SEric Sandeen "blocksize too small for journal device"); 4810ac27a0ecSDave Kleikamp goto out_bdev; 4811ac27a0ecSDave Kleikamp } 4812ac27a0ecSDave Kleikamp 4813617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4814617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4815ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4816ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4817b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4818b31e1552SEric Sandeen "external journal"); 4819ac27a0ecSDave Kleikamp goto out_bdev; 4820ac27a0ecSDave Kleikamp } 4821ac27a0ecSDave Kleikamp 48222716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4823617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4824ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4825617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4826b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4827b31e1552SEric Sandeen "bad superblock"); 4828ac27a0ecSDave Kleikamp brelse(bh); 4829ac27a0ecSDave Kleikamp goto out_bdev; 4830ac27a0ecSDave Kleikamp } 4831ac27a0ecSDave Kleikamp 4832df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4833df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4834df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4835df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4836df4763beSDarrick J. Wong "corrupt superblock"); 4837df4763beSDarrick J. Wong brelse(bh); 4838df4763beSDarrick J. Wong goto out_bdev; 4839df4763beSDarrick J. Wong } 4840df4763beSDarrick J. Wong 4841617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4842b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4843ac27a0ecSDave Kleikamp brelse(bh); 4844ac27a0ecSDave Kleikamp goto out_bdev; 4845ac27a0ecSDave Kleikamp } 4846ac27a0ecSDave Kleikamp 4847bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4848ac27a0ecSDave Kleikamp start = sb_block + 1; 4849ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4850ac27a0ecSDave Kleikamp 4851dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4852ac27a0ecSDave Kleikamp start, len, blocksize); 4853ac27a0ecSDave Kleikamp if (!journal) { 4854b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4855ac27a0ecSDave Kleikamp goto out_bdev; 4856ac27a0ecSDave Kleikamp } 4857ac27a0ecSDave Kleikamp journal->j_private = sb; 4858dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4859ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4860ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4861b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4862ac27a0ecSDave Kleikamp goto out_journal; 4863ac27a0ecSDave Kleikamp } 4864ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4865b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4866b31e1552SEric Sandeen "user (unsupported) - %d", 4867ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4868ac27a0ecSDave Kleikamp goto out_journal; 4869ac27a0ecSDave Kleikamp } 4870617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4871617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4872ac27a0ecSDave Kleikamp return journal; 48730b8e58a1SAndreas Dilger 4874ac27a0ecSDave Kleikamp out_journal: 4875dab291afSMingming Cao jbd2_journal_destroy(journal); 4876ac27a0ecSDave Kleikamp out_bdev: 4877617ba13bSMingming Cao ext4_blkdev_put(bdev); 4878ac27a0ecSDave Kleikamp return NULL; 4879ac27a0ecSDave Kleikamp } 4880ac27a0ecSDave Kleikamp 4881617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4882617ba13bSMingming Cao struct ext4_super_block *es, 4883ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4884ac27a0ecSDave Kleikamp { 4885ac27a0ecSDave Kleikamp journal_t *journal; 4886ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4887ac27a0ecSDave Kleikamp dev_t journal_dev; 4888ac27a0ecSDave Kleikamp int err = 0; 4889ac27a0ecSDave Kleikamp int really_read_only; 4890ac27a0ecSDave Kleikamp 4891e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 48920390131bSFrank Mayhar 4893ac27a0ecSDave Kleikamp if (journal_devnum && 4894ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4895b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4896b31e1552SEric Sandeen "numbers have changed"); 4897ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4898ac27a0ecSDave Kleikamp } else 4899ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4900ac27a0ecSDave Kleikamp 4901ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4902ac27a0ecSDave Kleikamp 4903ac27a0ecSDave Kleikamp /* 4904ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4905ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4906ac27a0ecSDave Kleikamp * can get read-write access to the device. 4907ac27a0ecSDave Kleikamp */ 4908e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4909bc98a42cSDavid Howells if (sb_rdonly(sb)) { 4910b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4911b31e1552SEric Sandeen "required on readonly filesystem"); 4912ac27a0ecSDave Kleikamp if (really_read_only) { 4913b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4914d98bf8cdSSimon Ruderich "unavailable, cannot proceed " 4915d98bf8cdSSimon Ruderich "(try mounting with noload)"); 4916ac27a0ecSDave Kleikamp return -EROFS; 4917ac27a0ecSDave Kleikamp } 4918b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4919b31e1552SEric Sandeen "be enabled during recovery"); 4920ac27a0ecSDave Kleikamp } 4921ac27a0ecSDave Kleikamp } 4922ac27a0ecSDave Kleikamp 4923ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4924b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4925b31e1552SEric Sandeen "and inode journals!"); 4926ac27a0ecSDave Kleikamp return -EINVAL; 4927ac27a0ecSDave Kleikamp } 4928ac27a0ecSDave Kleikamp 4929ac27a0ecSDave Kleikamp if (journal_inum) { 4930617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4931ac27a0ecSDave Kleikamp return -EINVAL; 4932ac27a0ecSDave Kleikamp } else { 4933617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4934ac27a0ecSDave Kleikamp return -EINVAL; 4935ac27a0ecSDave Kleikamp } 4936ac27a0ecSDave Kleikamp 493790576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4938b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 49394776004fSTheodore Ts'o 4940e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4941dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 49421c13d5c0STheodore Ts'o if (!err) { 49431c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 49441c13d5c0STheodore Ts'o if (save) 49451c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 49461c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4947dab291afSMingming Cao err = jbd2_journal_load(journal); 49481c13d5c0STheodore Ts'o if (save) 49491c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 49501c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 49511c13d5c0STheodore Ts'o kfree(save); 49521c13d5c0STheodore Ts'o } 4953ac27a0ecSDave Kleikamp 4954ac27a0ecSDave Kleikamp if (err) { 4955b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4956dab291afSMingming Cao jbd2_journal_destroy(journal); 4957ac27a0ecSDave Kleikamp return err; 4958ac27a0ecSDave Kleikamp } 4959ac27a0ecSDave Kleikamp 4960617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4961617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4962ac27a0ecSDave Kleikamp 4963c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4964ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4965ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4966ac27a0ecSDave Kleikamp 4967ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4968e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4969ac27a0ecSDave Kleikamp } 4970ac27a0ecSDave Kleikamp 4971ac27a0ecSDave Kleikamp return 0; 4972ac27a0ecSDave Kleikamp } 4973ac27a0ecSDave Kleikamp 4974e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4975ac27a0ecSDave Kleikamp { 4976e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4977617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4978c4be0c1dSTakashi Sato int error = 0; 4979ac27a0ecSDave Kleikamp 4980bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4981c4be0c1dSTakashi Sato return error; 4982a17712c8SJon Derrick 4983a17712c8SJon Derrick /* 4984a17712c8SJon Derrick * The superblock bh should be mapped, but it might not be if the 4985a17712c8SJon Derrick * device was hot-removed. Not much we can do but fail the I/O. 4986a17712c8SJon Derrick */ 4987a17712c8SJon Derrick if (!buffer_mapped(sbh)) 4988a17712c8SJon Derrick return error; 4989a17712c8SJon Derrick 499071290b36STheodore Ts'o /* 499171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 499271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 499371290b36STheodore Ts'o * write time when we are mounting the root file system 499471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 499571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 499671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 499771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 499871290b36STheodore Ts'o * to complain and force a full file system check. 499971290b36STheodore Ts'o */ 50001751e8a6SLinus Torvalds if (!(sb->s_flags & SB_RDONLY)) 50016a0678a7SArnd Bergmann ext4_update_tstamp(es, s_wtime); 5002f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 5003afc32f7eSTheodore Ts'o es->s_kbytes_written = 5004afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 5005dbae2c55SMichael Callahan ((part_stat_read(sb->s_bdev->bd_part, 5006dbae2c55SMichael Callahan sectors[STAT_WRITE]) - 5007afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 5008f613dfcbSTheodore Ts'o else 5009f613dfcbSTheodore Ts'o es->s_kbytes_written = 5010f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 5011d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 501257042651STheodore Ts'o ext4_free_blocks_count_set(es, 501357042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 501457042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 5015d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 50167f93cff9STheodore Ts'o es->s_free_inodes_count = 50177f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 50185d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 5019ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 502006db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 50211566a48aSTheodore Ts'o if (sync) 50224743f839SPranay Kr. Srivastava lock_buffer(sbh); 5023e8680786STheodore Ts'o if (buffer_write_io_error(sbh) || !buffer_uptodate(sbh)) { 50244743f839SPranay Kr. Srivastava /* 50254743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 50264743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 50274743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 50284743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 50294743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 50304743f839SPranay Kr. Srivastava * write and hope for the best. 50314743f839SPranay Kr. Srivastava */ 50324743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 50334743f839SPranay Kr. Srivastava "superblock detected"); 50344743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 50354743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 50364743f839SPranay Kr. Srivastava } 5037ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 5038914258bfSTheodore Ts'o if (sync) { 50391566a48aSTheodore Ts'o unlock_buffer(sbh); 5040564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 504100473374SJan Kara REQ_SYNC | (test_opt(sb, BARRIER) ? REQ_FUA : 0)); 5042c89128a0SJaegeuk Kim if (buffer_write_io_error(sbh)) { 5043b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 5044b31e1552SEric Sandeen "superblock"); 5045914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 5046914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 5047914258bfSTheodore Ts'o } 5048914258bfSTheodore Ts'o } 5049c4be0c1dSTakashi Sato return error; 5050ac27a0ecSDave Kleikamp } 5051ac27a0ecSDave Kleikamp 5052ac27a0ecSDave Kleikamp /* 5053ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 5054ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 5055ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 5056ac27a0ecSDave Kleikamp */ 5057617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 5058617ba13bSMingming Cao struct ext4_super_block *es) 5059ac27a0ecSDave Kleikamp { 5060617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 5061ac27a0ecSDave Kleikamp 5062e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 50630390131bSFrank Mayhar BUG_ON(journal != NULL); 50640390131bSFrank Mayhar return; 50650390131bSFrank Mayhar } 5066dab291afSMingming Cao jbd2_journal_lock_updates(journal); 50677ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 50687ffe1ea8SHidehiro Kawai goto out; 50697ffe1ea8SHidehiro Kawai 5070bc98a42cSDavid Howells if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) { 5071e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 5072e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5073ac27a0ecSDave Kleikamp } 50747ffe1ea8SHidehiro Kawai 50757ffe1ea8SHidehiro Kawai out: 5076dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 5077ac27a0ecSDave Kleikamp } 5078ac27a0ecSDave Kleikamp 5079ac27a0ecSDave Kleikamp /* 5080ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 5081ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 5082ac27a0ecSDave Kleikamp * main filesystem now. 5083ac27a0ecSDave Kleikamp */ 5084617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 5085617ba13bSMingming Cao struct ext4_super_block *es) 5086ac27a0ecSDave Kleikamp { 5087ac27a0ecSDave Kleikamp journal_t *journal; 5088ac27a0ecSDave Kleikamp int j_errno; 5089ac27a0ecSDave Kleikamp const char *errstr; 5090ac27a0ecSDave Kleikamp 5091e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 50920390131bSFrank Mayhar 5093617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5094ac27a0ecSDave Kleikamp 5095ac27a0ecSDave Kleikamp /* 5096ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 5097617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 5098ac27a0ecSDave Kleikamp */ 5099ac27a0ecSDave Kleikamp 5100dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 5101ac27a0ecSDave Kleikamp if (j_errno) { 5102ac27a0ecSDave Kleikamp char nbuf[16]; 5103ac27a0ecSDave Kleikamp 5104617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 510512062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 5106ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 510712062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 5108ac27a0ecSDave Kleikamp 5109617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 5110617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 5111e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5112ac27a0ecSDave Kleikamp 5113dab291afSMingming Cao jbd2_journal_clear_err(journal); 5114d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 5115ac27a0ecSDave Kleikamp } 5116ac27a0ecSDave Kleikamp } 5117ac27a0ecSDave Kleikamp 5118ac27a0ecSDave Kleikamp /* 5119ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 5120ac27a0ecSDave Kleikamp * and wait on the commit. 5121ac27a0ecSDave Kleikamp */ 5122617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 5123ac27a0ecSDave Kleikamp { 5124ac27a0ecSDave Kleikamp journal_t *journal; 5125ac27a0ecSDave Kleikamp 5126bc98a42cSDavid Howells if (sb_rdonly(sb)) 5127ac27a0ecSDave Kleikamp return 0; 5128ac27a0ecSDave Kleikamp 5129617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 5130b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 5131ac27a0ecSDave Kleikamp } 5132ac27a0ecSDave Kleikamp 5133617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 5134ac27a0ecSDave Kleikamp { 513514ce0cb4STheodore Ts'o int ret = 0; 51369eddacf9SJan Kara tid_t target; 513706a407f1SDmitry Monakhov bool needs_barrier = false; 51388d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5139ac27a0ecSDave Kleikamp 514049598e04SJun Piao if (unlikely(ext4_forced_shutdown(sbi))) 51410db1ff22STheodore Ts'o return 0; 51420db1ff22STheodore Ts'o 51439bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 51442e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 5145a1177825SJan Kara /* 5146a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 5147a1177825SJan Kara * no dirty dquots 5148a1177825SJan Kara */ 5149a1177825SJan Kara dquot_writeback_dquots(sb, -1); 515006a407f1SDmitry Monakhov /* 515106a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 515206a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 515306a407f1SDmitry Monakhov * transaction_commit will do it for us. 515406a407f1SDmitry Monakhov */ 5155bda32530STheodore Ts'o if (sbi->s_journal) { 515606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 515706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 515806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 515906a407f1SDmitry Monakhov needs_barrier = true; 516006a407f1SDmitry Monakhov 51618d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 5162ac27a0ecSDave Kleikamp if (wait) 5163bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 5164bda32530STheodore Ts'o target); 51650390131bSFrank Mayhar } 5166bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 5167bda32530STheodore Ts'o needs_barrier = true; 516806a407f1SDmitry Monakhov if (needs_barrier) { 516906a407f1SDmitry Monakhov int err; 517006a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 517106a407f1SDmitry Monakhov if (!ret) 517206a407f1SDmitry Monakhov ret = err; 517306a407f1SDmitry Monakhov } 517406a407f1SDmitry Monakhov 517506a407f1SDmitry Monakhov return ret; 517606a407f1SDmitry Monakhov } 517706a407f1SDmitry Monakhov 5178ac27a0ecSDave Kleikamp /* 5179ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 5180ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 5181be4f27d3SYongqiang Yang * 5182be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 51838e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 51848e8ad8a5SJan Kara * modifications. 5185ac27a0ecSDave Kleikamp */ 5186c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 5187ac27a0ecSDave Kleikamp { 5188c4be0c1dSTakashi Sato int error = 0; 5189c4be0c1dSTakashi Sato journal_t *journal; 5190ac27a0ecSDave Kleikamp 5191bc98a42cSDavid Howells if (sb_rdonly(sb)) 51929ca92389STheodore Ts'o return 0; 51939ca92389STheodore Ts'o 5194c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 5195ac27a0ecSDave Kleikamp 5196bb044576STheodore Ts'o if (journal) { 5197ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 5198dab291afSMingming Cao jbd2_journal_lock_updates(journal); 51997ffe1ea8SHidehiro Kawai 52007ffe1ea8SHidehiro Kawai /* 5201bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 5202bb044576STheodore Ts'o * flush the journal. 52037ffe1ea8SHidehiro Kawai */ 5204c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 52056b0310fbSEric Sandeen if (error < 0) 52066b0310fbSEric Sandeen goto out; 5207ac27a0ecSDave Kleikamp 5208ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 5209e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 5210c642dc9eSEric Sandeen } 5211c642dc9eSEric Sandeen 5212e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 52136b0310fbSEric Sandeen out: 5214bb044576STheodore Ts'o if (journal) 52158e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 5216bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 52176b0310fbSEric Sandeen return error; 5218ac27a0ecSDave Kleikamp } 5219ac27a0ecSDave Kleikamp 5220ac27a0ecSDave Kleikamp /* 5221ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 5222ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 5223ac27a0ecSDave Kleikamp */ 5224c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 5225ac27a0ecSDave Kleikamp { 5226bc98a42cSDavid Howells if (sb_rdonly(sb) || ext4_forced_shutdown(EXT4_SB(sb))) 52279ca92389STheodore Ts'o return 0; 52289ca92389STheodore Ts'o 5229c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 52309ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 5231e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 5232c642dc9eSEric Sandeen } 5233c642dc9eSEric Sandeen 5234e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 5235c4be0c1dSTakashi Sato return 0; 5236ac27a0ecSDave Kleikamp } 5237ac27a0ecSDave Kleikamp 5238673c6100STheodore Ts'o /* 5239673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 5240673c6100STheodore Ts'o */ 5241673c6100STheodore Ts'o struct ext4_mount_options { 5242673c6100STheodore Ts'o unsigned long s_mount_opt; 5243a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 524408cefc7aSEric W. Biederman kuid_t s_resuid; 524508cefc7aSEric W. Biederman kgid_t s_resgid; 5246673c6100STheodore Ts'o unsigned long s_commit_interval; 5247673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 5248673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 5249673c6100STheodore Ts'o int s_jquota_fmt; 5250a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 5251673c6100STheodore Ts'o #endif 5252673c6100STheodore Ts'o }; 5253673c6100STheodore Ts'o 5254617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 5255ac27a0ecSDave Kleikamp { 5256617ba13bSMingming Cao struct ext4_super_block *es; 5257617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5258ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 5259617ba13bSMingming Cao struct ext4_mount_options old_opts; 5260c79d967dSChristoph Hellwig int enable_quota = 0; 52618a266467STheodore Ts'o ext4_group_t g; 5262b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 5263c5e06d10SJohann Lombardi int err = 0; 5264ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 526503dafb5fSChen Gang int i, j; 526633458eabSTheodore Ts'o char *to_free[EXT4_MAXQUOTAS]; 5267ac27a0ecSDave Kleikamp #endif 5268d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 5269ac27a0ecSDave Kleikamp 527021ac738eSChengguang Xu if (data && !orig_data) 527121ac738eSChengguang Xu return -ENOMEM; 527221ac738eSChengguang Xu 5273ac27a0ecSDave Kleikamp /* Store the original options */ 5274ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 5275ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 5276a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 5277ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 5278ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 5279ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 528030773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 528130773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 5282ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5283ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 5284a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 528503dafb5fSChen Gang if (sbi->s_qf_names[i]) { 528633458eabSTheodore Ts'o char *qf_name = get_qf_name(sb, sbi, i); 528733458eabSTheodore Ts'o 528833458eabSTheodore Ts'o old_opts.s_qf_names[i] = kstrdup(qf_name, GFP_KERNEL); 528903dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 529003dafb5fSChen Gang for (j = 0; j < i; j++) 529103dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 52923e36a163SWei Yongjun kfree(orig_data); 529303dafb5fSChen Gang return -ENOMEM; 529403dafb5fSChen Gang } 529503dafb5fSChen Gang } else 529603dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 5297ac27a0ecSDave Kleikamp #endif 5298b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 5299b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 5300ac27a0ecSDave Kleikamp 5301661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 5302ac27a0ecSDave Kleikamp err = -EINVAL; 5303ac27a0ecSDave Kleikamp goto restore_opts; 5304ac27a0ecSDave Kleikamp } 5305ac27a0ecSDave Kleikamp 53066b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 53076b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 53086b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 53092d5b86e0SEric Sandeen "during remount not supported; ignoring"); 53102d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 5311c6d3d56dSDarrick J. Wong } 5312c6d3d56dSDarrick J. Wong 53136ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 53146ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 53156ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 53166ae6514bSPiotr Sarna "both data=journal and delalloc"); 53176ae6514bSPiotr Sarna err = -EINVAL; 53186ae6514bSPiotr Sarna goto restore_opts; 53196ae6514bSPiotr Sarna } 53206ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 53216ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 53226ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 53236ae6514bSPiotr Sarna err = -EINVAL; 53246ae6514bSPiotr Sarna goto restore_opts; 53256ae6514bSPiotr Sarna } 5326923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 5327923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 5328923ae0ffSRoss Zwisler "both data=journal and dax"); 5329923ae0ffSRoss Zwisler err = -EINVAL; 5330923ae0ffSRoss Zwisler goto restore_opts; 5331923ae0ffSRoss Zwisler } 5332ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 5333ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 5334ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 5335ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 5336ab04df78SJan Kara err = -EINVAL; 5337ab04df78SJan Kara goto restore_opts; 5338ab04df78SJan Kara } 5339923ae0ffSRoss Zwisler } 5340923ae0ffSRoss Zwisler 5341cdb7ee4cSTahsin Erdogan if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_NO_MBCACHE) { 5342cdb7ee4cSTahsin Erdogan ext4_msg(sb, KERN_ERR, "can't enable nombcache during remount"); 5343cdb7ee4cSTahsin Erdogan err = -EINVAL; 5344cdb7ee4cSTahsin Erdogan goto restore_opts; 5345cdb7ee4cSTahsin Erdogan } 5346cdb7ee4cSTahsin Erdogan 5347923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 5348923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 5349923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 5350923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 53516ae6514bSPiotr Sarna } 53526ae6514bSPiotr Sarna 53534ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 5354c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 5355ac27a0ecSDave Kleikamp 53561751e8a6SLinus Torvalds sb->s_flags = (sb->s_flags & ~SB_POSIXACL) | 53571751e8a6SLinus Torvalds (test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0); 5358ac27a0ecSDave Kleikamp 5359ac27a0ecSDave Kleikamp es = sbi->s_es; 5360ac27a0ecSDave Kleikamp 5361b3881f74STheodore Ts'o if (sbi->s_journal) { 5362617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 5363b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 5364b3881f74STheodore Ts'o } 5365ac27a0ecSDave Kleikamp 53661751e8a6SLinus Torvalds if (*flags & SB_LAZYTIME) 53671751e8a6SLinus Torvalds sb->s_flags |= SB_LAZYTIME; 5368a2fd66d0STheodore Ts'o 53691751e8a6SLinus Torvalds if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) { 53704ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 5371ac27a0ecSDave Kleikamp err = -EROFS; 5372ac27a0ecSDave Kleikamp goto restore_opts; 5373ac27a0ecSDave Kleikamp } 5374ac27a0ecSDave Kleikamp 53751751e8a6SLinus Torvalds if (*flags & SB_RDONLY) { 537638c03b34STheodore Ts'o err = sync_filesystem(sb); 537738c03b34STheodore Ts'o if (err < 0) 537838c03b34STheodore Ts'o goto restore_opts; 53790f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 53800f0dd62fSChristoph Hellwig if (err < 0) 5381c79d967dSChristoph Hellwig goto restore_opts; 5382c79d967dSChristoph Hellwig 5383ac27a0ecSDave Kleikamp /* 5384ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 5385ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 5386ac27a0ecSDave Kleikamp */ 53871751e8a6SLinus Torvalds sb->s_flags |= SB_RDONLY; 5388ac27a0ecSDave Kleikamp 5389ac27a0ecSDave Kleikamp /* 5390ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 5391ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5392ac27a0ecSDave Kleikamp * mark the partition as valid again. 5393ac27a0ecSDave Kleikamp */ 5394617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5395617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5396ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5397ac27a0ecSDave Kleikamp 5398a63c9eb2STheodore Ts'o if (sbi->s_journal) 5399617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 54002dca60d9STheodore Ts'o if (sbi->s_mmp_tsk) 54012dca60d9STheodore Ts'o kthread_stop(sbi->s_mmp_tsk); 5402ac27a0ecSDave Kleikamp } else { 5403a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5404e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 54052cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5406ac27a0ecSDave Kleikamp err = -EROFS; 5407ac27a0ecSDave Kleikamp goto restore_opts; 5408ac27a0ecSDave Kleikamp } 5409ead6596bSEric Sandeen /* 54108a266467STheodore Ts'o * Make sure the group descriptor checksums 54110b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 54128a266467STheodore Ts'o */ 54138a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 54148a266467STheodore Ts'o struct ext4_group_desc *gdp = 54158a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 54168a266467STheodore Ts'o 5417feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5418b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5419b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5420e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 54218a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 54226a797d27SDarrick J. Wong err = -EFSBADCRC; 54238a266467STheodore Ts'o goto restore_opts; 54248a266467STheodore Ts'o } 54258a266467STheodore Ts'o } 54268a266467STheodore Ts'o 54278a266467STheodore Ts'o /* 5428ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5429ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5430ead6596bSEric Sandeen * require a full umount/remount for now. 5431ead6596bSEric Sandeen */ 5432ead6596bSEric Sandeen if (es->s_last_orphan) { 5433b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5434ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5435ead6596bSEric Sandeen "orphan inode list. Please " 5436b31e1552SEric Sandeen "umount/remount instead"); 5437ead6596bSEric Sandeen err = -EINVAL; 5438ead6596bSEric Sandeen goto restore_opts; 5439ead6596bSEric Sandeen } 5440ead6596bSEric Sandeen 5441ac27a0ecSDave Kleikamp /* 5442ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5443ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5444ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5445ac27a0ecSDave Kleikamp * the partition.) 5446ac27a0ecSDave Kleikamp */ 54470390131bSFrank Mayhar if (sbi->s_journal) 5448617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5449ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5450c89128a0SJaegeuk Kim 5451c89128a0SJaegeuk Kim err = ext4_setup_super(sb, es, 0); 5452c89128a0SJaegeuk Kim if (err) 5453c89128a0SJaegeuk Kim goto restore_opts; 5454c89128a0SJaegeuk Kim 54551751e8a6SLinus Torvalds sb->s_flags &= ~SB_RDONLY; 5456e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5457c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5458c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5459c5e06d10SJohann Lombardi err = -EROFS; 5460c5e06d10SJohann Lombardi goto restore_opts; 5461c5e06d10SJohann Lombardi } 5462c79d967dSChristoph Hellwig enable_quota = 1; 5463ac27a0ecSDave Kleikamp } 5464ac27a0ecSDave Kleikamp } 5465bfff6873SLukas Czerner 5466bfff6873SLukas Czerner /* 5467bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5468bfff6873SLukas Czerner * current settings 5469bfff6873SLukas Czerner */ 5470bc98a42cSDavid Howells if (sb_rdonly(sb) || !test_opt(sb, INIT_INODE_TABLE)) 5471bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5472bfff6873SLukas Czerner else { 5473bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5474bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5475bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5476bfff6873SLukas Czerner } 5477bfff6873SLukas Czerner 54786fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5479c89128a0SJaegeuk Kim if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) { 5480c89128a0SJaegeuk Kim err = ext4_commit_super(sb, 1); 5481c89128a0SJaegeuk Kim if (err) 5482c89128a0SJaegeuk Kim goto restore_opts; 5483c89128a0SJaegeuk Kim } 54840390131bSFrank Mayhar 5485ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5486ac27a0ecSDave Kleikamp /* Release old quota file names */ 5487a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5488ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 54897c319d32SAditya Kali if (enable_quota) { 54907c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 54910f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5492e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 54937c319d32SAditya Kali err = ext4_enable_quotas(sb); 549407724f98STheodore Ts'o if (err) 54957c319d32SAditya Kali goto restore_opts; 54967c319d32SAditya Kali } 54977c319d32SAditya Kali } 54987c319d32SAditya Kali #endif 5499d4c402d9SCurt Wohlgemuth 55001751e8a6SLinus Torvalds *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME); 5501d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5502d4c402d9SCurt Wohlgemuth kfree(orig_data); 5503ac27a0ecSDave Kleikamp return 0; 55040b8e58a1SAndreas Dilger 5505ac27a0ecSDave Kleikamp restore_opts: 5506ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5507ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5508a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5509ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5510ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5511ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 551230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 551330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5514ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5515ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5516a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 551733458eabSTheodore Ts'o to_free[i] = get_qf_name(sb, sbi, i); 551833458eabSTheodore Ts'o rcu_assign_pointer(sbi->s_qf_names[i], old_opts.s_qf_names[i]); 5519ac27a0ecSDave Kleikamp } 552033458eabSTheodore Ts'o synchronize_rcu(); 552133458eabSTheodore Ts'o for (i = 0; i < EXT4_MAXQUOTAS; i++) 552233458eabSTheodore Ts'o kfree(to_free[i]); 5523ac27a0ecSDave Kleikamp #endif 5524d4c402d9SCurt Wohlgemuth kfree(orig_data); 5525ac27a0ecSDave Kleikamp return err; 5526ac27a0ecSDave Kleikamp } 5527ac27a0ecSDave Kleikamp 5528689c958cSLi Xi #ifdef CONFIG_QUOTA 5529689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5530689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5531689c958cSLi Xi { 5532689c958cSLi Xi struct kqid qid; 5533689c958cSLi Xi struct dquot *dquot; 5534689c958cSLi Xi u64 limit; 5535689c958cSLi Xi u64 curblock; 5536689c958cSLi Xi 5537689c958cSLi Xi qid = make_kqid_projid(projid); 5538689c958cSLi Xi dquot = dqget(sb, qid); 5539689c958cSLi Xi if (IS_ERR(dquot)) 5540689c958cSLi Xi return PTR_ERR(dquot); 55417b9ca4c6SJan Kara spin_lock(&dquot->dq_dqb_lock); 5542689c958cSLi Xi 5543689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 5544689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 5545689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 5546689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5547f06925c7SKonstantin Khlebnikov curblock = (dquot->dq_dqb.dqb_curspace + 5548f06925c7SKonstantin Khlebnikov dquot->dq_dqb.dqb_rsvspace) >> sb->s_blocksize_bits; 5549689c958cSLi Xi buf->f_blocks = limit; 5550689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5551689c958cSLi Xi (buf->f_blocks > curblock) ? 5552689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5553689c958cSLi Xi } 5554689c958cSLi Xi 5555689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 5556689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 5557689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 5558689c958cSLi Xi if (limit && buf->f_files > limit) { 5559689c958cSLi Xi buf->f_files = limit; 5560689c958cSLi Xi buf->f_ffree = 5561689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5562689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5563689c958cSLi Xi } 5564689c958cSLi Xi 55657b9ca4c6SJan Kara spin_unlock(&dquot->dq_dqb_lock); 5566689c958cSLi Xi dqput(dquot); 5567689c958cSLi Xi return 0; 5568689c958cSLi Xi } 5569689c958cSLi Xi #endif 5570689c958cSLi Xi 5571617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5572ac27a0ecSDave Kleikamp { 5573ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5574617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5575617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 557627dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5577960cc398SPekka Enberg u64 fsid; 5578d02a9391SKazuya Mio s64 bfree; 557927dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5580ac27a0ecSDave Kleikamp 5581952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5582952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5583ac27a0ecSDave Kleikamp 5584617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5585ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5586b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 558757042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 558857042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5589d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 559057042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 559127dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 559227dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 559327dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5594ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5595ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 559652d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5597617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5598960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5599960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5600960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5601960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 56020b8e58a1SAndreas Dilger 5603689c958cSLi Xi #ifdef CONFIG_QUOTA 5604689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5605689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5606689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5607689c958cSLi Xi #endif 5608ac27a0ecSDave Kleikamp return 0; 5609ac27a0ecSDave Kleikamp } 5610ac27a0ecSDave Kleikamp 5611ac27a0ecSDave Kleikamp 5612ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5613ac27a0ecSDave Kleikamp 5614bc8230eeSJan Kara /* 5615bc8230eeSJan Kara * Helper functions so that transaction is started before we acquire dqio_sem 5616bc8230eeSJan Kara * to keep correct lock ordering of transaction > dqio_sem 5617bc8230eeSJan Kara */ 5618ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5619ac27a0ecSDave Kleikamp { 56204c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5621ac27a0ecSDave Kleikamp } 5622ac27a0ecSDave Kleikamp 5623617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5624ac27a0ecSDave Kleikamp { 5625ac27a0ecSDave Kleikamp int ret, err; 5626ac27a0ecSDave Kleikamp handle_t *handle; 5627ac27a0ecSDave Kleikamp struct inode *inode; 5628ac27a0ecSDave Kleikamp 5629ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 56309924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5631617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5632ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5633ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5634ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5635617ba13bSMingming Cao err = ext4_journal_stop(handle); 5636ac27a0ecSDave Kleikamp if (!ret) 5637ac27a0ecSDave Kleikamp ret = err; 5638ac27a0ecSDave Kleikamp return ret; 5639ac27a0ecSDave Kleikamp } 5640ac27a0ecSDave Kleikamp 5641617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5642ac27a0ecSDave Kleikamp { 5643ac27a0ecSDave Kleikamp int ret, err; 5644ac27a0ecSDave Kleikamp handle_t *handle; 5645ac27a0ecSDave Kleikamp 56469924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5647617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5648ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5649ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5650ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5651617ba13bSMingming Cao err = ext4_journal_stop(handle); 5652ac27a0ecSDave Kleikamp if (!ret) 5653ac27a0ecSDave Kleikamp ret = err; 5654ac27a0ecSDave Kleikamp return ret; 5655ac27a0ecSDave Kleikamp } 5656ac27a0ecSDave Kleikamp 5657617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5658ac27a0ecSDave Kleikamp { 5659ac27a0ecSDave Kleikamp int ret, err; 5660ac27a0ecSDave Kleikamp handle_t *handle; 5661ac27a0ecSDave Kleikamp 56629924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5663617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 56649c3013e9SJan Kara if (IS_ERR(handle)) { 56659c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 56669c3013e9SJan Kara dquot_release(dquot); 5667ac27a0ecSDave Kleikamp return PTR_ERR(handle); 56689c3013e9SJan Kara } 5669ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5670617ba13bSMingming Cao err = ext4_journal_stop(handle); 5671ac27a0ecSDave Kleikamp if (!ret) 5672ac27a0ecSDave Kleikamp ret = err; 5673ac27a0ecSDave Kleikamp return ret; 5674ac27a0ecSDave Kleikamp } 5675ac27a0ecSDave Kleikamp 5676617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5677ac27a0ecSDave Kleikamp { 5678262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5679262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5680262b4662SJan Kara 56812c8be6b2SJan Kara /* Are we journaling quotas? */ 5682e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5683262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5684ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5685617ba13bSMingming Cao return ext4_write_dquot(dquot); 5686ac27a0ecSDave Kleikamp } else { 5687ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5688ac27a0ecSDave Kleikamp } 5689ac27a0ecSDave Kleikamp } 5690ac27a0ecSDave Kleikamp 5691617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5692ac27a0ecSDave Kleikamp { 5693ac27a0ecSDave Kleikamp int ret, err; 5694ac27a0ecSDave Kleikamp handle_t *handle; 5695ac27a0ecSDave Kleikamp 5696ac27a0ecSDave Kleikamp /* Data block + inode block */ 56972b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5698ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5699ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5700ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5701617ba13bSMingming Cao err = ext4_journal_stop(handle); 5702ac27a0ecSDave Kleikamp if (!ret) 5703ac27a0ecSDave Kleikamp ret = err; 5704ac27a0ecSDave Kleikamp return ret; 5705ac27a0ecSDave Kleikamp } 5706ac27a0ecSDave Kleikamp 5707ac27a0ecSDave Kleikamp /* 5708ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5709ac27a0ecSDave Kleikamp * the quota file and such... 5710ac27a0ecSDave Kleikamp */ 5711617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5712ac27a0ecSDave Kleikamp { 571333458eabSTheodore Ts'o return dquot_quota_on_mount(sb, get_qf_name(sb, EXT4_SB(sb), type), 5714617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5715ac27a0ecSDave Kleikamp } 5716ac27a0ecSDave Kleikamp 5717daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5718daf647d2STheodore Ts'o { 5719daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5720daf647d2STheodore Ts'o 5721daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5722daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5723daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5724daf647d2STheodore Ts'o * because the name of the lock is set using the 5725daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5726daf647d2STheodore Ts'o */ 5727daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5728daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5729daf647d2STheodore Ts'o } 5730daf647d2STheodore Ts'o 5731ac27a0ecSDave Kleikamp /* 5732ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5733ac27a0ecSDave Kleikamp */ 5734617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 57358c54ca9cSAl Viro const struct path *path) 5736ac27a0ecSDave Kleikamp { 5737ac27a0ecSDave Kleikamp int err; 5738ac27a0ecSDave Kleikamp 5739ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5740ac27a0ecSDave Kleikamp return -EINVAL; 57410623543bSJan Kara 5742ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5743d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5744ac27a0ecSDave Kleikamp return -EXDEV; 57450623543bSJan Kara /* Journaling quota? */ 57460623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 57472b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5748f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5749b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5750b31e1552SEric Sandeen "Quota file not on filesystem root. " 5751b31e1552SEric Sandeen "Journaled quota will not work"); 575291389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_NOLIST_DIRTY; 575391389240SJan Kara } else { 575491389240SJan Kara /* 575591389240SJan Kara * Clear the flag just in case mount options changed since 575691389240SJan Kara * last time. 575791389240SJan Kara */ 575891389240SJan Kara sb_dqopt(sb)->flags &= ~DQUOT_NOLIST_DIRTY; 57590623543bSJan Kara } 57600623543bSJan Kara 57610623543bSJan Kara /* 57620623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 57630623543bSJan Kara * all updates to the file when we bypass pagecache... 57640623543bSJan Kara */ 57650390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 57662b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 57670623543bSJan Kara /* 57680623543bSJan Kara * We don't need to lock updates but journal_flush() could 57690623543bSJan Kara * otherwise be livelocked... 57700623543bSJan Kara */ 57710623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 57727ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 57730623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5774f00c9e44SJan Kara if (err) 57757ffe1ea8SHidehiro Kawai return err; 57767ffe1ea8SHidehiro Kawai } 5777957153fcSJan Kara 5778daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5779daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5780957153fcSJan Kara if (err) { 5781daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5782daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5783957153fcSJan Kara } else { 5784957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 5785957153fcSJan Kara handle_t *handle; 5786957153fcSJan Kara 578761a92987SJan Kara /* 578861a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 578961a92987SJan Kara * files. If this fails, we return success anyway since quotas 579061a92987SJan Kara * are already enabled and this is not a hard failure. 579161a92987SJan Kara */ 5792957153fcSJan Kara inode_lock(inode); 5793957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 5794957153fcSJan Kara if (IS_ERR(handle)) 5795957153fcSJan Kara goto unlock_inode; 5796957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 5797957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 5798957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 5799957153fcSJan Kara ext4_mark_inode_dirty(handle, inode); 5800957153fcSJan Kara ext4_journal_stop(handle); 5801957153fcSJan Kara unlock_inode: 5802957153fcSJan Kara inode_unlock(inode); 5803957153fcSJan Kara } 5804daf647d2STheodore Ts'o return err; 5805ac27a0ecSDave Kleikamp } 5806ac27a0ecSDave Kleikamp 58077c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 58087c319d32SAditya Kali unsigned int flags) 58097c319d32SAditya Kali { 58107c319d32SAditya Kali int err; 58117c319d32SAditya Kali struct inode *qf_inode; 5812a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 58137c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5814689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5815689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 58167c319d32SAditya Kali }; 58177c319d32SAditya Kali 5818e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 58197c319d32SAditya Kali 58207c319d32SAditya Kali if (!qf_inums[type]) 58217c319d32SAditya Kali return -EPERM; 58227c319d32SAditya Kali 58238a363970STheodore Ts'o qf_inode = ext4_iget(sb, qf_inums[type], EXT4_IGET_SPECIAL); 58247c319d32SAditya Kali if (IS_ERR(qf_inode)) { 58257c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 58267c319d32SAditya Kali return PTR_ERR(qf_inode); 58277c319d32SAditya Kali } 58287c319d32SAditya Kali 5829bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5830bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5831daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 58327212b95eSJan Kara err = dquot_load_quota_inode(qf_inode, type, format_id, flags); 5833daf647d2STheodore Ts'o if (err) 5834daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 583561157b24SPan Bian iput(qf_inode); 58367c319d32SAditya Kali 58377c319d32SAditya Kali return err; 58387c319d32SAditya Kali } 58397c319d32SAditya Kali 58407c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 58417c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 58427c319d32SAditya Kali { 58437c319d32SAditya Kali int type, err = 0; 5844a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 58457c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5846689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5847689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 58487c319d32SAditya Kali }; 584949da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 585049da9392SJan Kara test_opt(sb, USRQUOTA), 585149da9392SJan Kara test_opt(sb, GRPQUOTA), 585249da9392SJan Kara test_opt(sb, PRJQUOTA), 585349da9392SJan Kara }; 58547c319d32SAditya Kali 585591389240SJan Kara sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE | DQUOT_NOLIST_DIRTY; 5856a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 58577c319d32SAditya Kali if (qf_inums[type]) { 58587c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 585949da9392SJan Kara DQUOT_USAGE_ENABLED | 586049da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 58617c319d32SAditya Kali if (err) { 58627c319d32SAditya Kali ext4_warning(sb, 586372ba7450STheodore Ts'o "Failed to enable quota tracking " 586472ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 586572ba7450STheodore Ts'o "e2fsck to fix.", type, err); 58667f144fd0SJunichi Uekawa for (type--; type >= 0; type--) 58677f144fd0SJunichi Uekawa dquot_quota_off(sb, type); 58687f144fd0SJunichi Uekawa 58697c319d32SAditya Kali return err; 58707c319d32SAditya Kali } 58717c319d32SAditya Kali } 58727c319d32SAditya Kali } 58737c319d32SAditya Kali return 0; 58747c319d32SAditya Kali } 58757c319d32SAditya Kali 5876ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5877ca0e05e4SDmitry Monakhov { 587821f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 587921f97697SJan Kara handle_t *handle; 5880957153fcSJan Kara int err; 588121f97697SJan Kara 588287009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 588387009d86SDmitry Monakhov * Caller already holds s_umount sem */ 588487009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5885ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5886ca0e05e4SDmitry Monakhov 5887957153fcSJan Kara if (!inode || !igrab(inode)) 58880b268590SAmir Goldstein goto out; 58890b268590SAmir Goldstein 5890957153fcSJan Kara err = dquot_quota_off(sb, type); 5891964edf66SJan Kara if (err || ext4_has_feature_quota(sb)) 5892957153fcSJan Kara goto out_put; 5893957153fcSJan Kara 5894957153fcSJan Kara inode_lock(inode); 589561a92987SJan Kara /* 589661a92987SJan Kara * Update modification times of quota files when userspace can 589761a92987SJan Kara * start looking at them. If we fail, we return success anyway since 589861a92987SJan Kara * this is not a hard failure and quotas are already disabled. 589961a92987SJan Kara */ 59009924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 590121f97697SJan Kara if (IS_ERR(handle)) 5902957153fcSJan Kara goto out_unlock; 5903957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 5904957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 5905eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 590621f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 590721f97697SJan Kara ext4_journal_stop(handle); 5908957153fcSJan Kara out_unlock: 5909957153fcSJan Kara inode_unlock(inode); 5910957153fcSJan Kara out_put: 5911964edf66SJan Kara lockdep_set_quota_inode(inode, I_DATA_SEM_NORMAL); 5912957153fcSJan Kara iput(inode); 5913957153fcSJan Kara return err; 591421f97697SJan Kara out: 5915ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5916ca0e05e4SDmitry Monakhov } 5917ca0e05e4SDmitry Monakhov 5918ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5919ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5920ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5921ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5922617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5923ac27a0ecSDave Kleikamp size_t len, loff_t off) 5924ac27a0ecSDave Kleikamp { 5925ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5926725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5927ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5928ac27a0ecSDave Kleikamp int tocopy; 5929ac27a0ecSDave Kleikamp size_t toread; 5930ac27a0ecSDave Kleikamp struct buffer_head *bh; 5931ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5932ac27a0ecSDave Kleikamp 5933ac27a0ecSDave Kleikamp if (off > i_size) 5934ac27a0ecSDave Kleikamp return 0; 5935ac27a0ecSDave Kleikamp if (off+len > i_size) 5936ac27a0ecSDave Kleikamp len = i_size-off; 5937ac27a0ecSDave Kleikamp toread = len; 5938ac27a0ecSDave Kleikamp while (toread > 0) { 5939ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5940ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 59411c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 59421c215028STheodore Ts'o if (IS_ERR(bh)) 59431c215028STheodore Ts'o return PTR_ERR(bh); 5944ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5945ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5946ac27a0ecSDave Kleikamp else 5947ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5948ac27a0ecSDave Kleikamp brelse(bh); 5949ac27a0ecSDave Kleikamp offset = 0; 5950ac27a0ecSDave Kleikamp toread -= tocopy; 5951ac27a0ecSDave Kleikamp data += tocopy; 5952ac27a0ecSDave Kleikamp blk++; 5953ac27a0ecSDave Kleikamp } 5954ac27a0ecSDave Kleikamp return len; 5955ac27a0ecSDave Kleikamp } 5956ac27a0ecSDave Kleikamp 5957ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5958ac27a0ecSDave Kleikamp * enough credits) */ 5959617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5960ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5961ac27a0ecSDave Kleikamp { 5962ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5963725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 59641c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5965c5e298aeSTheodore Ts'o int retries = 0; 5966ac27a0ecSDave Kleikamp struct buffer_head *bh; 5967ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5968ac27a0ecSDave Kleikamp 59690390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5970b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5971b31e1552SEric Sandeen " cancelled because transaction is not started", 59729c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 59739c3013e9SJan Kara return -EIO; 59749c3013e9SJan Kara } 597567eeb568SDmitry Monakhov /* 597667eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 597767eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 597867eeb568SDmitry Monakhov */ 597967eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 598067eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 598167eeb568SDmitry Monakhov " cancelled because not block aligned", 598267eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 598367eeb568SDmitry Monakhov return -EIO; 598467eeb568SDmitry Monakhov } 598567eeb568SDmitry Monakhov 5986c5e298aeSTheodore Ts'o do { 5987c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5988c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5989c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5990c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5991c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 59921c215028STheodore Ts'o if (IS_ERR(bh)) 59931c215028STheodore Ts'o return PTR_ERR(bh); 5994ac27a0ecSDave Kleikamp if (!bh) 5995ac27a0ecSDave Kleikamp goto out; 59965d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5997617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5998ac27a0ecSDave Kleikamp if (err) { 5999ac27a0ecSDave Kleikamp brelse(bh); 60001c215028STheodore Ts'o return err; 6001ac27a0ecSDave Kleikamp } 6002ac27a0ecSDave Kleikamp lock_buffer(bh); 600367eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 6004ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 6005ac27a0ecSDave Kleikamp unlock_buffer(bh); 60060390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 6007ac27a0ecSDave Kleikamp brelse(bh); 6008ac27a0ecSDave Kleikamp out: 600967eeb568SDmitry Monakhov if (inode->i_size < off + len) { 601067eeb568SDmitry Monakhov i_size_write(inode, off + len); 6011617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 6012617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 601321f97697SJan Kara } 601467eeb568SDmitry Monakhov return len; 6015ac27a0ecSDave Kleikamp } 6016ac27a0ecSDave Kleikamp #endif 6017ac27a0ecSDave Kleikamp 6018152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 6019152a0836SAl Viro const char *dev_name, void *data) 6020ac27a0ecSDave Kleikamp { 6021152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 6022ac27a0ecSDave Kleikamp } 6023ac27a0ecSDave Kleikamp 6024c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 602524b58424STheodore Ts'o static inline void register_as_ext2(void) 602624b58424STheodore Ts'o { 602724b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 602824b58424STheodore Ts'o if (err) 602924b58424STheodore Ts'o printk(KERN_WARNING 603024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 603124b58424STheodore Ts'o } 603224b58424STheodore Ts'o 603324b58424STheodore Ts'o static inline void unregister_as_ext2(void) 603424b58424STheodore Ts'o { 603524b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 603624b58424STheodore Ts'o } 60372035e776STheodore Ts'o 60382035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 60392035e776STheodore Ts'o { 6040e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 60412035e776STheodore Ts'o return 0; 6042bc98a42cSDavid Howells if (sb_rdonly(sb)) 60432035e776STheodore Ts'o return 1; 6044e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 60452035e776STheodore Ts'o return 0; 60462035e776STheodore Ts'o return 1; 60472035e776STheodore Ts'o } 604824b58424STheodore Ts'o #else 604924b58424STheodore Ts'o static inline void register_as_ext2(void) { } 605024b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 60512035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 605224b58424STheodore Ts'o #endif 605324b58424STheodore Ts'o 605424b58424STheodore Ts'o static inline void register_as_ext3(void) 605524b58424STheodore Ts'o { 605624b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 605724b58424STheodore Ts'o if (err) 605824b58424STheodore Ts'o printk(KERN_WARNING 605924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 606024b58424STheodore Ts'o } 606124b58424STheodore Ts'o 606224b58424STheodore Ts'o static inline void unregister_as_ext3(void) 606324b58424STheodore Ts'o { 606424b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 606524b58424STheodore Ts'o } 60662035e776STheodore Ts'o 60672035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 60682035e776STheodore Ts'o { 6069e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 60702035e776STheodore Ts'o return 0; 6071e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 60722035e776STheodore Ts'o return 0; 6073bc98a42cSDavid Howells if (sb_rdonly(sb)) 60742035e776STheodore Ts'o return 1; 6075e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 60762035e776STheodore Ts'o return 0; 60772035e776STheodore Ts'o return 1; 60782035e776STheodore Ts'o } 607924b58424STheodore Ts'o 608003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 6081ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 608203010a33STheodore Ts'o .name = "ext4", 6083152a0836SAl Viro .mount = ext4_mount, 6084ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 6085ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 6086ac27a0ecSDave Kleikamp }; 60877f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 6088ac27a0ecSDave Kleikamp 6089e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 6090e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 6091e9e3bcecSEric Sandeen 60925dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 6093ac27a0ecSDave Kleikamp { 6094e9e3bcecSEric Sandeen int i, err; 6095c9de560dSAlex Tomas 6096e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 609707c0c5d8SAl Viro ext4_li_info = NULL; 609807c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 609907c0c5d8SAl Viro 61009a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 610112e9b892SDmitry Monakhov ext4_check_flag_values(); 6102e9e3bcecSEric Sandeen 6103e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 6104e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 6105e9e3bcecSEric Sandeen 610651865fdaSZheng Liu err = ext4_init_es(); 61076fd058f7STheodore Ts'o if (err) 61086fd058f7STheodore Ts'o return err; 610951865fdaSZheng Liu 61101dc0aa46SEric Whitney err = ext4_init_pending(); 61111dc0aa46SEric Whitney if (err) 611222cfe4b4SEric Biggers goto out7; 611322cfe4b4SEric Biggers 611422cfe4b4SEric Biggers err = ext4_init_post_read_processing(); 611522cfe4b4SEric Biggers if (err) 61161dc0aa46SEric Whitney goto out6; 61171dc0aa46SEric Whitney 611851865fdaSZheng Liu err = ext4_init_pageio(); 611951865fdaSZheng Liu if (err) 6120b5799018STheodore Ts'o goto out5; 612151865fdaSZheng Liu 61225dabfc78STheodore Ts'o err = ext4_init_system_zone(); 6123bd2d0210STheodore Ts'o if (err) 6124b5799018STheodore Ts'o goto out4; 6125857ac889SLukas Czerner 6126b5799018STheodore Ts'o err = ext4_init_sysfs(); 6127dd68314cSTheodore Ts'o if (err) 6128b5799018STheodore Ts'o goto out3; 6129857ac889SLukas Czerner 61305dabfc78STheodore Ts'o err = ext4_init_mballoc(); 6131ac27a0ecSDave Kleikamp if (err) 6132c9de560dSAlex Tomas goto out2; 6133ac27a0ecSDave Kleikamp err = init_inodecache(); 6134ac27a0ecSDave Kleikamp if (err) 6135ac27a0ecSDave Kleikamp goto out1; 613624b58424STheodore Ts'o register_as_ext3(); 61372035e776STheodore Ts'o register_as_ext2(); 613803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 6139ac27a0ecSDave Kleikamp if (err) 6140ac27a0ecSDave Kleikamp goto out; 6141bfff6873SLukas Czerner 6142ac27a0ecSDave Kleikamp return 0; 6143ac27a0ecSDave Kleikamp out: 614424b58424STheodore Ts'o unregister_as_ext2(); 614524b58424STheodore Ts'o unregister_as_ext3(); 6146ac27a0ecSDave Kleikamp destroy_inodecache(); 6147ac27a0ecSDave Kleikamp out1: 61485dabfc78STheodore Ts'o ext4_exit_mballoc(); 61499c191f70ST Makphaibulchoke out2: 6150b5799018STheodore Ts'o ext4_exit_sysfs(); 6151b5799018STheodore Ts'o out3: 6152dd68314cSTheodore Ts'o ext4_exit_system_zone(); 6153b5799018STheodore Ts'o out4: 61545dabfc78STheodore Ts'o ext4_exit_pageio(); 6155b5799018STheodore Ts'o out5: 615622cfe4b4SEric Biggers ext4_exit_post_read_processing(); 61571dc0aa46SEric Whitney out6: 615822cfe4b4SEric Biggers ext4_exit_pending(); 615922cfe4b4SEric Biggers out7: 616051865fdaSZheng Liu ext4_exit_es(); 616151865fdaSZheng Liu 6162ac27a0ecSDave Kleikamp return err; 6163ac27a0ecSDave Kleikamp } 6164ac27a0ecSDave Kleikamp 61655dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 6166ac27a0ecSDave Kleikamp { 6167bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 616824b58424STheodore Ts'o unregister_as_ext2(); 616924b58424STheodore Ts'o unregister_as_ext3(); 617003010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 6171ac27a0ecSDave Kleikamp destroy_inodecache(); 61725dabfc78STheodore Ts'o ext4_exit_mballoc(); 6173b5799018STheodore Ts'o ext4_exit_sysfs(); 61745dabfc78STheodore Ts'o ext4_exit_system_zone(); 61755dabfc78STheodore Ts'o ext4_exit_pageio(); 617622cfe4b4SEric Biggers ext4_exit_post_read_processing(); 6177dd12ed14SEric Sandeen ext4_exit_es(); 61781dc0aa46SEric Whitney ext4_exit_pending(); 6179ac27a0ecSDave Kleikamp } 6180ac27a0ecSDave Kleikamp 6181ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 618283982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 6183ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 61847ef79ad5STheodore Ts'o MODULE_SOFTDEP("pre: crc32c"); 61855dabfc78STheodore Ts'o module_init(ext4_init_fs) 61865dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 6187