1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 2766114cadSTejun Heo #include <linux/backing-dev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 373197ebdbSTheodore Ts'o #include <linux/ctype.h> 381330593eSVignesh Babu #include <linux/log2.h> 39717d50e4SAndreas Dilger #include <linux/crc16.h> 407abc52c2SDan Magenheimer #include <linux/cleancache.h> 417c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 42ac27a0ecSDave Kleikamp 43bfff6873SLukas Czerner #include <linux/kthread.h> 44bfff6873SLukas Czerner #include <linux/freezer.h> 45bfff6873SLukas Czerner 463dcf5451SChristoph Hellwig #include "ext4.h" 474a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 483dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 49ac27a0ecSDave Kleikamp #include "xattr.h" 50ac27a0ecSDave Kleikamp #include "acl.h" 513661d286STheodore Ts'o #include "mballoc.h" 52ac27a0ecSDave Kleikamp 539bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 549bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 559bffad1eSTheodore Ts'o 560b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 570b75a840SLukas Czerner static struct mutex ext4_li_mtx; 58e294a537STheodore Ts'o static struct ratelimit_state ext4_mount_msg_ratelimit; 599f6200bbSTheodore Ts'o 60617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 61ac27a0ecSDave Kleikamp unsigned long journal_devnum); 622adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 63e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 64617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 65617ba13bSMingming Cao struct ext4_super_block *es); 66617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 67617ba13bSMingming Cao struct ext4_super_block *es); 68617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 69617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 70617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 71c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 72c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 73152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 74152a0836SAl Viro const char *dev_name, void *data); 752035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 762035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 77d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 78bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 79bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 808f1f7453SEric Sandeen static void ext4_clear_request_list(void); 81c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 82c6cb7e77SEric Whitney unsigned int journal_inum); 83ac27a0ecSDave Kleikamp 84e74031fdSJan Kara /* 85e74031fdSJan Kara * Lock ordering 86e74031fdSJan Kara * 87e74031fdSJan Kara * Note the difference between i_mmap_sem (EXT4_I(inode)->i_mmap_sem) and 88e74031fdSJan Kara * i_mmap_rwsem (inode->i_mmap_rwsem)! 89e74031fdSJan Kara * 90e74031fdSJan Kara * page fault path: 91e74031fdSJan Kara * mmap_sem -> sb_start_pagefault -> i_mmap_sem (r) -> transaction start -> 92e74031fdSJan Kara * page lock -> i_data_sem (rw) 93e74031fdSJan Kara * 94e74031fdSJan Kara * buffered write path: 95e74031fdSJan Kara * sb_start_write -> i_mutex -> mmap_sem 96e74031fdSJan Kara * sb_start_write -> i_mutex -> transaction start -> page lock -> 97e74031fdSJan Kara * i_data_sem (rw) 98e74031fdSJan Kara * 99e74031fdSJan Kara * truncate: 100e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> 101e74031fdSJan Kara * i_mmap_rwsem (w) -> page lock 102e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (w) -> i_mmap_sem (w) -> 103e74031fdSJan Kara * transaction start -> i_data_sem (rw) 104e74031fdSJan Kara * 105e74031fdSJan Kara * direct IO: 106e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> mmap_sem 107e74031fdSJan Kara * sb_start_write -> i_mutex -> EXT4_STATE_DIOREAD_LOCK (r) -> 108e74031fdSJan Kara * transaction start -> i_data_sem (rw) 109e74031fdSJan Kara * 110e74031fdSJan Kara * writepages: 111e74031fdSJan Kara * transaction start -> page lock(s) -> i_data_sem (rw) 112e74031fdSJan Kara */ 113e74031fdSJan Kara 114c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 1152035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 1162035e776STheodore Ts'o .owner = THIS_MODULE, 1172035e776STheodore Ts'o .name = "ext2", 1182035e776STheodore Ts'o .mount = ext4_mount, 1192035e776STheodore Ts'o .kill_sb = kill_block_super, 1202035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 1212035e776STheodore Ts'o }; 1227f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 123fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 1242035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 1252035e776STheodore Ts'o #else 1262035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1272035e776STheodore Ts'o #endif 1282035e776STheodore Ts'o 1292035e776STheodore Ts'o 130ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 131ba69f9abSJan Kara .owner = THIS_MODULE, 132ba69f9abSJan Kara .name = "ext3", 133152a0836SAl Viro .mount = ext4_mount, 134ba69f9abSJan Kara .kill_sb = kill_block_super, 135ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 136ba69f9abSJan Kara }; 1377f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 138fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 139ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 140bd81d8eeSLaurent Vivier 141d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 142d25425f8SDarrick J. Wong struct ext4_super_block *es) 143d25425f8SDarrick J. Wong { 144e2b911c5SDarrick J. Wong if (!ext4_has_feature_metadata_csum(sb)) 145d25425f8SDarrick J. Wong return 1; 146d25425f8SDarrick J. Wong 147d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 148d25425f8SDarrick J. Wong } 149d25425f8SDarrick J. Wong 150a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 151a9c47317SDarrick J. Wong struct ext4_super_block *es) 152a9c47317SDarrick J. Wong { 153a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 154a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 155a9c47317SDarrick J. Wong __u32 csum; 156a9c47317SDarrick J. Wong 157a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 158a9c47317SDarrick J. Wong 159a9c47317SDarrick J. Wong return cpu_to_le32(csum); 160a9c47317SDarrick J. Wong } 161a9c47317SDarrick J. Wong 162c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 163a9c47317SDarrick J. Wong struct ext4_super_block *es) 164a9c47317SDarrick J. Wong { 1659aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 166a9c47317SDarrick J. Wong return 1; 167a9c47317SDarrick J. Wong 168a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 169a9c47317SDarrick J. Wong } 170a9c47317SDarrick J. Wong 17106db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 172a9c47317SDarrick J. Wong { 17306db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 17406db49e6STheodore Ts'o 1759aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 176a9c47317SDarrick J. Wong return; 177a9c47317SDarrick J. Wong 178a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 179a9c47317SDarrick J. Wong } 180a9c47317SDarrick J. Wong 1819933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1829933fc0aSTheodore Ts'o { 1839933fc0aSTheodore Ts'o void *ret; 1849933fc0aSTheodore Ts'o 1858be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1869933fc0aSTheodore Ts'o if (!ret) 1879933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1889933fc0aSTheodore Ts'o return ret; 1899933fc0aSTheodore Ts'o } 1909933fc0aSTheodore Ts'o 1919933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1929933fc0aSTheodore Ts'o { 1939933fc0aSTheodore Ts'o void *ret; 1949933fc0aSTheodore Ts'o 1958be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1969933fc0aSTheodore Ts'o if (!ret) 1979933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1989933fc0aSTheodore Ts'o return ret; 1999933fc0aSTheodore Ts'o } 2009933fc0aSTheodore Ts'o 2018fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 2028fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 203bd81d8eeSLaurent Vivier { 2043a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 2058fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2068fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 207bd81d8eeSLaurent Vivier } 208bd81d8eeSLaurent Vivier 2098fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 2108fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 211bd81d8eeSLaurent Vivier { 2125272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2138fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2148fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 215bd81d8eeSLaurent Vivier } 216bd81d8eeSLaurent Vivier 2178fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2188fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 219bd81d8eeSLaurent Vivier { 2205272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2218fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2228fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 223bd81d8eeSLaurent Vivier } 224bd81d8eeSLaurent Vivier 225021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 226560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 227560671a0SAneesh Kumar K.V { 228560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 229560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 230560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 231560671a0SAneesh Kumar K.V } 232560671a0SAneesh Kumar K.V 233560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 234560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 235560671a0SAneesh Kumar K.V { 236560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 237560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 238560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 239560671a0SAneesh Kumar K.V } 240560671a0SAneesh Kumar K.V 241560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 242560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 243560671a0SAneesh Kumar K.V { 244560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 245560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 246560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 247560671a0SAneesh Kumar K.V } 248560671a0SAneesh Kumar K.V 249560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 250560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 251560671a0SAneesh Kumar K.V { 252560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 253560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 254560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 255560671a0SAneesh Kumar K.V } 256560671a0SAneesh Kumar K.V 2578fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2588fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 259bd81d8eeSLaurent Vivier { 2603a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2618fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2628fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 263bd81d8eeSLaurent Vivier } 264bd81d8eeSLaurent Vivier 2658fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2668fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 267bd81d8eeSLaurent Vivier { 2685272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2698fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2708fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 271bd81d8eeSLaurent Vivier } 272bd81d8eeSLaurent Vivier 2738fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2748fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 275bd81d8eeSLaurent Vivier { 2765272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2778fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2788fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 279bd81d8eeSLaurent Vivier } 280bd81d8eeSLaurent Vivier 281021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 282560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 283560671a0SAneesh Kumar K.V { 284560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 285560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 286560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 287560671a0SAneesh Kumar K.V } 288560671a0SAneesh Kumar K.V 289560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 290560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 291560671a0SAneesh Kumar K.V { 292560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 293560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 294560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 295560671a0SAneesh Kumar K.V } 296560671a0SAneesh Kumar K.V 297560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 298560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 299560671a0SAneesh Kumar K.V { 300560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 301560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 302560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 303560671a0SAneesh Kumar K.V } 304560671a0SAneesh Kumar K.V 305560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 306560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 307560671a0SAneesh Kumar K.V { 308560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 309560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 310560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 311560671a0SAneesh Kumar K.V } 312560671a0SAneesh Kumar K.V 313d3d1faf6SCurt Wohlgemuth 3141c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3151c13d5c0STheodore Ts'o unsigned int line) 3161c13d5c0STheodore Ts'o { 3171c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3181c13d5c0STheodore Ts'o 3191c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3201b46617bSTheodore Ts'o if (bdev_read_only(sb->s_bdev)) 3211b46617bSTheodore Ts'o return; 3221c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3231c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3241c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3251c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3261c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3271c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3281c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3291c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3301c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3311c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3321c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3331c13d5c0STheodore Ts'o } 33466e61a9eSTheodore Ts'o /* 33566e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 33666e61a9eSTheodore Ts'o * started already 33766e61a9eSTheodore Ts'o */ 33866e61a9eSTheodore Ts'o if (!es->s_error_count) 33966e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 340ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3411c13d5c0STheodore Ts'o } 3421c13d5c0STheodore Ts'o 3431c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3441c13d5c0STheodore Ts'o unsigned int line) 3451c13d5c0STheodore Ts'o { 3461c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3471c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3481c13d5c0STheodore Ts'o } 3491c13d5c0STheodore Ts'o 350bdfe0cbdSTheodore Ts'o /* 351bdfe0cbdSTheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 352bdfe0cbdSTheodore Ts'o * structures, including the bdi structure, without telling anyone 353bdfe0cbdSTheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 354bdfe0cbdSTheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 355bdfe0cbdSTheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 356bdfe0cbdSTheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 357bdfe0cbdSTheodore Ts'o */ 358bdfe0cbdSTheodore Ts'o static int block_device_ejected(struct super_block *sb) 359bdfe0cbdSTheodore Ts'o { 360bdfe0cbdSTheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 361bdfe0cbdSTheodore Ts'o struct backing_dev_info *bdi = inode_to_bdi(bd_inode); 362bdfe0cbdSTheodore Ts'o 363bdfe0cbdSTheodore Ts'o return bdi->dev == NULL; 364bdfe0cbdSTheodore Ts'o } 365bdfe0cbdSTheodore Ts'o 36618aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 36718aadd47SBobi Jam { 36818aadd47SBobi Jam struct super_block *sb = journal->j_private; 36918aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 37018aadd47SBobi Jam int error = is_journal_aborted(journal); 3715d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 37218aadd47SBobi Jam 3735d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 37418aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3755d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3765d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3775d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 37818aadd47SBobi Jam list_del_init(&jce->jce_list); 37918aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 38018aadd47SBobi Jam jce->jce_func(sb, jce, error); 38118aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 38218aadd47SBobi Jam } 38318aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 38418aadd47SBobi Jam } 3851c13d5c0STheodore Ts'o 386ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 387ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 388ac27a0ecSDave Kleikamp * 389ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 390617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 391ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 392ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 393ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 394ac27a0ecSDave Kleikamp * write out the superblock safely. 395ac27a0ecSDave Kleikamp * 396dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 397d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 398ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 399ac27a0ecSDave Kleikamp */ 400ac27a0ecSDave Kleikamp 401617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 402ac27a0ecSDave Kleikamp { 403ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 404ac27a0ecSDave Kleikamp return; 405ac27a0ecSDave Kleikamp 406ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 407617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 408ac27a0ecSDave Kleikamp 4094ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 410ac27a0ecSDave Kleikamp if (journal) 411dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 412ac27a0ecSDave Kleikamp } 413ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 414b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4154418e141SDmitry Monakhov /* 4164418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4174418e141SDmitry Monakhov * before ->s_flags update 4184418e141SDmitry Monakhov */ 4194418e141SDmitry Monakhov smp_wmb(); 420ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 421ac27a0ecSDave Kleikamp } 4224327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 4234327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 4244327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 4254327ba52SDaeho Jeong return; 426617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 427ac27a0ecSDave Kleikamp sb->s_id); 428ac27a0ecSDave Kleikamp } 4294327ba52SDaeho Jeong } 430ac27a0ecSDave Kleikamp 431efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 432efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 433efbed4dcSTheodore Ts'o "EXT4-fs error") 434efbed4dcSTheodore Ts'o 43512062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 436c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 437ac27a0ecSDave Kleikamp { 4380ff2ea7dSJoe Perches struct va_format vaf; 439ac27a0ecSDave Kleikamp va_list args; 440ac27a0ecSDave Kleikamp 4410db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 4420db1ff22STheodore Ts'o return; 4430db1ff22STheodore Ts'o 444efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 445ac27a0ecSDave Kleikamp va_start(args, fmt); 4460ff2ea7dSJoe Perches vaf.fmt = fmt; 4470ff2ea7dSJoe Perches vaf.va = &args; 448efbed4dcSTheodore Ts'o printk(KERN_CRIT 449efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4500ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 451ac27a0ecSDave Kleikamp va_end(args); 452efbed4dcSTheodore Ts'o } 453f3fc0210STheodore Ts'o save_error_info(sb, function, line); 454617ba13bSMingming Cao ext4_handle_error(sb); 455ac27a0ecSDave Kleikamp } 456ac27a0ecSDave Kleikamp 457e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 458c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 459273df556SFrank Mayhar const char *fmt, ...) 460273df556SFrank Mayhar { 461273df556SFrank Mayhar va_list args; 462f7c21177STheodore Ts'o struct va_format vaf; 4631c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 464273df556SFrank Mayhar 4650db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 4660db1ff22STheodore Ts'o return; 4670db1ff22STheodore Ts'o 4681c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4691c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 470efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 471273df556SFrank Mayhar va_start(args, fmt); 472f7c21177STheodore Ts'o vaf.fmt = fmt; 473f7c21177STheodore Ts'o vaf.va = &args; 474c398eda0STheodore Ts'o if (block) 475d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 476d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 477d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 478d9ee81daSJoe Perches block, current->comm, &vaf); 479d9ee81daSJoe Perches else 480d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 481d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 482d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 483d9ee81daSJoe Perches current->comm, &vaf); 484273df556SFrank Mayhar va_end(args); 485efbed4dcSTheodore Ts'o } 486efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 487273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 488273df556SFrank Mayhar } 489273df556SFrank Mayhar 490e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 491f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 492f7c21177STheodore Ts'o const char *fmt, ...) 493273df556SFrank Mayhar { 494273df556SFrank Mayhar va_list args; 495f7c21177STheodore Ts'o struct va_format vaf; 4961c13d5c0STheodore Ts'o struct ext4_super_block *es; 497496ad9aaSAl Viro struct inode *inode = file_inode(file); 498273df556SFrank Mayhar char pathname[80], *path; 499273df556SFrank Mayhar 5000db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) 5010db1ff22STheodore Ts'o return; 5020db1ff22STheodore Ts'o 5031c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 5041c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 505efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 5069bf39ab2SMiklos Szeredi path = file_path(file, pathname, sizeof(pathname)); 507f9a62d09SDan Carpenter if (IS_ERR(path)) 508273df556SFrank Mayhar path = "(unknown)"; 509f7c21177STheodore Ts'o va_start(args, fmt); 510f7c21177STheodore Ts'o vaf.fmt = fmt; 511f7c21177STheodore Ts'o vaf.va = &args; 512d9ee81daSJoe Perches if (block) 513d9ee81daSJoe Perches printk(KERN_CRIT 514d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 515d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 516d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 517d9ee81daSJoe Perches block, current->comm, path, &vaf); 518d9ee81daSJoe Perches else 519d9ee81daSJoe Perches printk(KERN_CRIT 520d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 521d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 522d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 523d9ee81daSJoe Perches current->comm, path, &vaf); 524273df556SFrank Mayhar va_end(args); 525efbed4dcSTheodore Ts'o } 526efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 527273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 528273df556SFrank Mayhar } 529273df556SFrank Mayhar 530722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 531ac27a0ecSDave Kleikamp char nbuf[16]) 532ac27a0ecSDave Kleikamp { 533ac27a0ecSDave Kleikamp char *errstr = NULL; 534ac27a0ecSDave Kleikamp 535ac27a0ecSDave Kleikamp switch (errno) { 5366a797d27SDarrick J. Wong case -EFSCORRUPTED: 5376a797d27SDarrick J. Wong errstr = "Corrupt filesystem"; 5386a797d27SDarrick J. Wong break; 5396a797d27SDarrick J. Wong case -EFSBADCRC: 5406a797d27SDarrick J. Wong errstr = "Filesystem failed CRC"; 5416a797d27SDarrick J. Wong break; 542ac27a0ecSDave Kleikamp case -EIO: 543ac27a0ecSDave Kleikamp errstr = "IO failure"; 544ac27a0ecSDave Kleikamp break; 545ac27a0ecSDave Kleikamp case -ENOMEM: 546ac27a0ecSDave Kleikamp errstr = "Out of memory"; 547ac27a0ecSDave Kleikamp break; 548ac27a0ecSDave Kleikamp case -EROFS: 54978f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 55078f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 551ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 552ac27a0ecSDave Kleikamp else 553ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 554ac27a0ecSDave Kleikamp break; 555ac27a0ecSDave Kleikamp default: 556ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 557ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 558ac27a0ecSDave Kleikamp * NULL. */ 559ac27a0ecSDave Kleikamp if (nbuf) { 560ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 561ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 562ac27a0ecSDave Kleikamp errstr = nbuf; 563ac27a0ecSDave Kleikamp } 564ac27a0ecSDave Kleikamp break; 565ac27a0ecSDave Kleikamp } 566ac27a0ecSDave Kleikamp 567ac27a0ecSDave Kleikamp return errstr; 568ac27a0ecSDave Kleikamp } 569ac27a0ecSDave Kleikamp 570617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 571ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 572ac27a0ecSDave Kleikamp 573c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 574c398eda0STheodore Ts'o unsigned int line, int errno) 575ac27a0ecSDave Kleikamp { 576ac27a0ecSDave Kleikamp char nbuf[16]; 577ac27a0ecSDave Kleikamp const char *errstr; 578ac27a0ecSDave Kleikamp 5790db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 5800db1ff22STheodore Ts'o return; 5810db1ff22STheodore Ts'o 582ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 583ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 584ac27a0ecSDave Kleikamp * an error. */ 585ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 586ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 587ac27a0ecSDave Kleikamp return; 588ac27a0ecSDave Kleikamp 589efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 590617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 591c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 592c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 593efbed4dcSTheodore Ts'o } 594ac27a0ecSDave Kleikamp 595efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 596617ba13bSMingming Cao ext4_handle_error(sb); 597ac27a0ecSDave Kleikamp } 598ac27a0ecSDave Kleikamp 599ac27a0ecSDave Kleikamp /* 600617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 601ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 602ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 603ac27a0ecSDave Kleikamp * 604ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 605ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 606ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 607ac27a0ecSDave Kleikamp */ 608ac27a0ecSDave Kleikamp 609c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 610c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 611ac27a0ecSDave Kleikamp { 612651e1c3bSJoe Perches struct va_format vaf; 613ac27a0ecSDave Kleikamp va_list args; 614ac27a0ecSDave Kleikamp 6150db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 6160db1ff22STheodore Ts'o return; 6170db1ff22STheodore Ts'o 6181c13d5c0STheodore Ts'o save_error_info(sb, function, line); 619ac27a0ecSDave Kleikamp va_start(args, fmt); 620651e1c3bSJoe Perches vaf.fmt = fmt; 621651e1c3bSJoe Perches vaf.va = &args; 622651e1c3bSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: %pV\n", 623651e1c3bSJoe Perches sb->s_id, function, line, &vaf); 624ac27a0ecSDave Kleikamp va_end(args); 625ac27a0ecSDave Kleikamp 6261c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 627b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 6284ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 6294418e141SDmitry Monakhov /* 6304418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 6314418e141SDmitry Monakhov * before ->s_flags update 6324418e141SDmitry Monakhov */ 6334418e141SDmitry Monakhov smp_wmb(); 6344418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 635ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 636dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 6371c13d5c0STheodore Ts'o save_error_info(sb, function, line); 6381c13d5c0STheodore Ts'o } 6394327ba52SDaeho Jeong if (test_opt(sb, ERRORS_PANIC)) { 6404327ba52SDaeho Jeong if (EXT4_SB(sb)->s_journal && 6414327ba52SDaeho Jeong !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR)) 6424327ba52SDaeho Jeong return; 6431c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 644ac27a0ecSDave Kleikamp } 6454327ba52SDaeho Jeong } 646ac27a0ecSDave Kleikamp 647e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 648e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 649b31e1552SEric Sandeen { 6500ff2ea7dSJoe Perches struct va_format vaf; 651b31e1552SEric Sandeen va_list args; 652b31e1552SEric Sandeen 653efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 654efbed4dcSTheodore Ts'o return; 655efbed4dcSTheodore Ts'o 656b31e1552SEric Sandeen va_start(args, fmt); 6570ff2ea7dSJoe Perches vaf.fmt = fmt; 6580ff2ea7dSJoe Perches vaf.va = &args; 6590ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 660b31e1552SEric Sandeen va_end(args); 661b31e1552SEric Sandeen } 662b31e1552SEric Sandeen 663b03a2f7eSAndreas Dilger #define ext4_warning_ratelimit(sb) \ 664b03a2f7eSAndreas Dilger ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), \ 665b03a2f7eSAndreas Dilger "EXT4-fs warning") 666b03a2f7eSAndreas Dilger 66712062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 668c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 669ac27a0ecSDave Kleikamp { 6700ff2ea7dSJoe Perches struct va_format vaf; 671ac27a0ecSDave Kleikamp va_list args; 672ac27a0ecSDave Kleikamp 673b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(sb)) 674efbed4dcSTheodore Ts'o return; 675efbed4dcSTheodore Ts'o 676ac27a0ecSDave Kleikamp va_start(args, fmt); 6770ff2ea7dSJoe Perches vaf.fmt = fmt; 6780ff2ea7dSJoe Perches vaf.va = &args; 6790ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6800ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 681ac27a0ecSDave Kleikamp va_end(args); 682ac27a0ecSDave Kleikamp } 683ac27a0ecSDave Kleikamp 684b03a2f7eSAndreas Dilger void __ext4_warning_inode(const struct inode *inode, const char *function, 685b03a2f7eSAndreas Dilger unsigned int line, const char *fmt, ...) 686b03a2f7eSAndreas Dilger { 687b03a2f7eSAndreas Dilger struct va_format vaf; 688b03a2f7eSAndreas Dilger va_list args; 689b03a2f7eSAndreas Dilger 690b03a2f7eSAndreas Dilger if (!ext4_warning_ratelimit(inode->i_sb)) 691b03a2f7eSAndreas Dilger return; 692b03a2f7eSAndreas Dilger 693b03a2f7eSAndreas Dilger va_start(args, fmt); 694b03a2f7eSAndreas Dilger vaf.fmt = fmt; 695b03a2f7eSAndreas Dilger vaf.va = &args; 696b03a2f7eSAndreas Dilger printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: " 697b03a2f7eSAndreas Dilger "inode #%lu: comm %s: %pV\n", inode->i_sb->s_id, 698b03a2f7eSAndreas Dilger function, line, inode->i_ino, current->comm, &vaf); 699b03a2f7eSAndreas Dilger va_end(args); 700b03a2f7eSAndreas Dilger } 701b03a2f7eSAndreas Dilger 702e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 703e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 704e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 705e29136f8STheodore Ts'o const char *fmt, ...) 7065d1b1b3fSAneesh Kumar K.V __releases(bitlock) 7075d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 7085d1b1b3fSAneesh Kumar K.V { 7090ff2ea7dSJoe Perches struct va_format vaf; 7105d1b1b3fSAneesh Kumar K.V va_list args; 7115d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 7125d1b1b3fSAneesh Kumar K.V 7130db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 7140db1ff22STheodore Ts'o return; 7150db1ff22STheodore Ts'o 7161c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 7171c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 7181c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 7190ff2ea7dSJoe Perches 720efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 7215d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 7220ff2ea7dSJoe Perches vaf.fmt = fmt; 7230ff2ea7dSJoe Perches vaf.va = &args; 72421149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 725e29136f8STheodore Ts'o sb->s_id, function, line, grp); 726e29136f8STheodore Ts'o if (ino) 7270ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 728e29136f8STheodore Ts'o if (block) 729efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 730efbed4dcSTheodore Ts'o (unsigned long long) block); 7310ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 7325d1b1b3fSAneesh Kumar K.V va_end(args); 733efbed4dcSTheodore Ts'o } 7345d1b1b3fSAneesh Kumar K.V 7355d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 736e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 7375d1b1b3fSAneesh Kumar K.V return; 7385d1b1b3fSAneesh Kumar K.V } 7391c13d5c0STheodore Ts'o 7405d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 7415d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 7425d1b1b3fSAneesh Kumar K.V /* 7435d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 7445d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 7455d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 7465d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 7475d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 74825985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 7495d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 7505d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 7515d1b1b3fSAneesh Kumar K.V * more appropriate error code. 7525d1b1b3fSAneesh Kumar K.V */ 7535d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 7545d1b1b3fSAneesh Kumar K.V return; 7555d1b1b3fSAneesh Kumar K.V } 7565d1b1b3fSAneesh Kumar K.V 757617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 758ac27a0ecSDave Kleikamp { 759617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 760ac27a0ecSDave Kleikamp 761617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 762ac27a0ecSDave Kleikamp return; 763ac27a0ecSDave Kleikamp 76412062dddSEric Sandeen ext4_warning(sb, 765ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 766ac27a0ecSDave Kleikamp "running e2fsck is recommended", 767617ba13bSMingming Cao EXT4_DYNAMIC_REV); 768ac27a0ecSDave Kleikamp 769617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 770617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 771617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 772ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 773ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 774ac27a0ecSDave Kleikamp 775ac27a0ecSDave Kleikamp /* 776ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 777ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 778ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 779ac27a0ecSDave Kleikamp */ 780ac27a0ecSDave Kleikamp } 781ac27a0ecSDave Kleikamp 782ac27a0ecSDave Kleikamp /* 783ac27a0ecSDave Kleikamp * Open the external journal device 784ac27a0ecSDave Kleikamp */ 785b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 786ac27a0ecSDave Kleikamp { 787ac27a0ecSDave Kleikamp struct block_device *bdev; 788ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 789ac27a0ecSDave Kleikamp 790d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 791ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 792ac27a0ecSDave Kleikamp goto fail; 793ac27a0ecSDave Kleikamp return bdev; 794ac27a0ecSDave Kleikamp 795ac27a0ecSDave Kleikamp fail: 796b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 797ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 798ac27a0ecSDave Kleikamp return NULL; 799ac27a0ecSDave Kleikamp } 800ac27a0ecSDave Kleikamp 801ac27a0ecSDave Kleikamp /* 802ac27a0ecSDave Kleikamp * Release the journal device 803ac27a0ecSDave Kleikamp */ 8044385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 805ac27a0ecSDave Kleikamp { 8064385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 807ac27a0ecSDave Kleikamp } 808ac27a0ecSDave Kleikamp 8094385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 810ac27a0ecSDave Kleikamp { 811ac27a0ecSDave Kleikamp struct block_device *bdev; 812ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 813ac27a0ecSDave Kleikamp if (bdev) { 8144385bab1SAl Viro ext4_blkdev_put(bdev); 815ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 816ac27a0ecSDave Kleikamp } 817ac27a0ecSDave Kleikamp } 818ac27a0ecSDave Kleikamp 819ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 820ac27a0ecSDave Kleikamp { 821617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 822ac27a0ecSDave Kleikamp } 823ac27a0ecSDave Kleikamp 824617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 825ac27a0ecSDave Kleikamp { 826ac27a0ecSDave Kleikamp struct list_head *l; 827ac27a0ecSDave Kleikamp 828b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 829ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 830ac27a0ecSDave Kleikamp 831ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 832ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 833ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 834ac27a0ecSDave Kleikamp printk(KERN_ERR " " 835ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 836ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 837ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 838ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 839ac27a0ecSDave Kleikamp } 840ac27a0ecSDave Kleikamp } 841ac27a0ecSDave Kleikamp 842617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 843ac27a0ecSDave Kleikamp { 844617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 845617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 84697abd7d4STheodore Ts'o int aborted = 0; 847ef2cabf7SHidehiro Kawai int i, err; 848ac27a0ecSDave Kleikamp 849857ac889SLukas Czerner ext4_unregister_li_request(sb); 850e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 851e0ccfd95SChristoph Hellwig 8522e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 8532e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 8544c0425ffSMingming Cao 8550390131bSFrank Mayhar if (sbi->s_journal) { 85697abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 857ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 85847b4a50bSJan Kara sbi->s_journal = NULL; 85997abd7d4STheodore Ts'o if ((err < 0) && !aborted) 860c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8610390131bSFrank Mayhar } 862d4edac31SJosef Bacik 863ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 864d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 8659105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 866d4edac31SJosef Bacik ext4_release_system_zone(sb); 867d4edac31SJosef Bacik ext4_mb_release(sb); 868d4edac31SJosef Bacik ext4_ext_release(sb); 869d4edac31SJosef Bacik 87097abd7d4STheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && !aborted) { 871e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 872ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 873ac27a0ecSDave Kleikamp } 87458c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 875a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 876a8e25a83SArtem Bityutskiy 877ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 878ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 879b93b41d4SAl Viro kvfree(sbi->s_group_desc); 880b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 88157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 882ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 883ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 88457042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 885c8585c6fSDaeho Jeong percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 886ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 887a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 888ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 889ac27a0ecSDave Kleikamp #endif 890ac27a0ecSDave Kleikamp 891ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 892ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 893ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 894ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 895ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 896ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 897ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 898ac27a0ecSDave Kleikamp 89989d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 900f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 901ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 902ac27a0ecSDave Kleikamp /* 903ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 904ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 905ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 906ac27a0ecSDave Kleikamp */ 907ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 908f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 909617ba13bSMingming Cao ext4_blkdev_remove(sbi); 910ac27a0ecSDave Kleikamp } 9119c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 9129c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 9139c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 9149c191f70ST Makphaibulchoke } 915c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 916c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 9179060dd2cSEric Sandeen brelse(sbi->s_sbh); 918ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9193197ebdbSTheodore Ts'o /* 9203197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9213197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9223197ebdbSTheodore Ts'o */ 9233197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9243197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9250441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9260441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 927705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 928ac27a0ecSDave Kleikamp kfree(sbi); 929ac27a0ecSDave Kleikamp } 930ac27a0ecSDave Kleikamp 931e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 932ac27a0ecSDave Kleikamp 933ac27a0ecSDave Kleikamp /* 934ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 935ac27a0ecSDave Kleikamp */ 936617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 937ac27a0ecSDave Kleikamp { 938617ba13bSMingming Cao struct ext4_inode_info *ei; 939ac27a0ecSDave Kleikamp 940e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 941ac27a0ecSDave Kleikamp if (!ei) 942ac27a0ecSDave Kleikamp return NULL; 9430b8e58a1SAndreas Dilger 944ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 945202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 946c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 947c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 9489a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 9499a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 950edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 951eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 952edaa53caSZheng Liu ei->i_es_shk_nr = 0; 953dd475925SJan Kara ei->i_es_shrink_lblk = 0; 954d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 955d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 956d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9579d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9587e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 959d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 960a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 961a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 96296c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 963a9e7f447SDmitry Monakhov #endif 9648aefcd55STheodore Ts'o ei->jinode = NULL; 9652e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 966744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 967b436b9beSJan Kara ei->i_sync_tid = 0; 968b436b9beSJan Kara ei->i_datasync_tid = 0; 969e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9702e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 971ac27a0ecSDave Kleikamp return &ei->vfs_inode; 972ac27a0ecSDave Kleikamp } 973ac27a0ecSDave Kleikamp 9747ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9757ff9c073STheodore Ts'o { 9767ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9777ff9c073STheodore Ts'o 9787ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9797ff9c073STheodore Ts'o return drop; 9807ff9c073STheodore Ts'o } 9817ff9c073STheodore Ts'o 982fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 983fa0d7e3dSNick Piggin { 984fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 985fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 986fa0d7e3dSNick Piggin } 987fa0d7e3dSNick Piggin 988617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 989ac27a0ecSDave Kleikamp { 9909f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 991b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 992b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 993b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9949f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9959f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9969f7dd93dSVasily Averin true); 9979f7dd93dSVasily Averin dump_stack(); 9989f7dd93dSVasily Averin } 999fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1000ac27a0ecSDave Kleikamp } 1001ac27a0ecSDave Kleikamp 100251cc5068SAlexey Dobriyan static void init_once(void *foo) 1003ac27a0ecSDave Kleikamp { 1004617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1005ac27a0ecSDave Kleikamp 1006ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1007ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 10080e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1009ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1010ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1011ac27a0ecSDave Kleikamp } 1012ac27a0ecSDave Kleikamp 1013e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1014ac27a0ecSDave Kleikamp { 1015617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 1016617ba13bSMingming Cao sizeof(struct ext4_inode_info), 1017ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 10185d097056SVladimir Davydov SLAB_MEM_SPREAD|SLAB_ACCOUNT), 101920c2df83SPaul Mundt init_once); 1020617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1021ac27a0ecSDave Kleikamp return -ENOMEM; 1022ac27a0ecSDave Kleikamp return 0; 1023ac27a0ecSDave Kleikamp } 1024ac27a0ecSDave Kleikamp 1025ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1026ac27a0ecSDave Kleikamp { 10278c0a8537SKirill A. Shutemov /* 10288c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 10298c0a8537SKirill A. Shutemov * destroy cache. 10308c0a8537SKirill A. Shutemov */ 10318c0a8537SKirill A. Shutemov rcu_barrier(); 1032617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1033ac27a0ecSDave Kleikamp } 1034ac27a0ecSDave Kleikamp 10350930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1036ac27a0ecSDave Kleikamp { 10370930fcc1SAl Viro invalidate_inode_buffers(inode); 1038dbd5768fSJan Kara clear_inode(inode); 10399f754758SChristoph Hellwig dquot_drop(inode); 1040c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 104151865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 10428aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10438aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10448aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10458aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10468aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10478aefcd55STheodore Ts'o } 1048b7236e21STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 1049a7550b30SJaegeuk Kim fscrypt_put_encryption_info(inode, NULL); 1050b7236e21STheodore Ts'o #endif 1051ac27a0ecSDave Kleikamp } 1052ac27a0ecSDave Kleikamp 10531b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10541b961ac0SChristoph Hellwig u64 ino, u32 generation) 1055ac27a0ecSDave Kleikamp { 1056ac27a0ecSDave Kleikamp struct inode *inode; 1057ac27a0ecSDave Kleikamp 1058617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1059ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1060617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1061ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1062ac27a0ecSDave Kleikamp 1063ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1064ac27a0ecSDave Kleikamp * 1065617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1066ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1067ac27a0ecSDave Kleikamp * 1068ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1069ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1070ac27a0ecSDave Kleikamp */ 1071f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10721d1fe1eeSDavid Howells if (IS_ERR(inode)) 10731d1fe1eeSDavid Howells return ERR_CAST(inode); 10741d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1075ac27a0ecSDave Kleikamp iput(inode); 1076ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1077ac27a0ecSDave Kleikamp } 10781b961ac0SChristoph Hellwig 10791b961ac0SChristoph Hellwig return inode; 1080ac27a0ecSDave Kleikamp } 10811b961ac0SChristoph Hellwig 10821b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10831b961ac0SChristoph Hellwig int fh_len, int fh_type) 10841b961ac0SChristoph Hellwig { 10851b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10861b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10871b961ac0SChristoph Hellwig } 10881b961ac0SChristoph Hellwig 10891b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10901b961ac0SChristoph Hellwig int fh_len, int fh_type) 10911b961ac0SChristoph Hellwig { 10921b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10931b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1094ac27a0ecSDave Kleikamp } 1095ac27a0ecSDave Kleikamp 1096c39a7f84SToshiyuki Okajima /* 1097c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1098c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1099c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1100c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1101c39a7f84SToshiyuki Okajima */ 11020b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11030b8e58a1SAndreas Dilger gfp_t wait) 1104c39a7f84SToshiyuki Okajima { 1105c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1106c39a7f84SToshiyuki Okajima 1107c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1108c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1109c39a7f84SToshiyuki Okajima return 0; 1110c39a7f84SToshiyuki Okajima if (journal) 1111c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1112d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1113c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1114c39a7f84SToshiyuki Okajima } 1115c39a7f84SToshiyuki Okajima 1116a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1117a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1118a7550b30SJaegeuk Kim { 1119a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1120a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1121a7550b30SJaegeuk Kim } 1122a7550b30SJaegeuk Kim 1123a7550b30SJaegeuk Kim static int ext4_prepare_context(struct inode *inode) 1124a7550b30SJaegeuk Kim { 1125a7550b30SJaegeuk Kim return ext4_convert_inline_data(inode); 1126a7550b30SJaegeuk Kim } 1127a7550b30SJaegeuk Kim 1128a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1129a7550b30SJaegeuk Kim void *fs_data) 1130a7550b30SJaegeuk Kim { 11312f8f5e76SEric Biggers handle_t *handle = fs_data; 11322f8f5e76SEric Biggers int res, res2, retries = 0; 1133a7550b30SJaegeuk Kim 11342f8f5e76SEric Biggers /* 11352f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 11362f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 11372f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 11382f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 11392f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 11402f8f5e76SEric Biggers */ 11412f8f5e76SEric Biggers 11422f8f5e76SEric Biggers if (handle) { 11432f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 11442f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 11452f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 11462f8f5e76SEric Biggers ctx, len, 0); 1147a7550b30SJaegeuk Kim if (!res) { 1148a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1149a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1150a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1151a3caa24bSJan Kara /* 1152a3caa24bSJan Kara * Update inode->i_flags - e.g. S_DAX may get disabled 1153a3caa24bSJan Kara */ 1154a3caa24bSJan Kara ext4_set_inode_flags(inode); 1155a7550b30SJaegeuk Kim } 1156a7550b30SJaegeuk Kim return res; 1157a7550b30SJaegeuk Kim } 1158a7550b30SJaegeuk Kim 11592f8f5e76SEric Biggers retry: 1160a7550b30SJaegeuk Kim handle = ext4_journal_start(inode, EXT4_HT_MISC, 1161a7550b30SJaegeuk Kim ext4_jbd2_credits_xattr(inode)); 1162a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1163a7550b30SJaegeuk Kim return PTR_ERR(handle); 1164a7550b30SJaegeuk Kim 11652f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 11662f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 11672f8f5e76SEric Biggers ctx, len, 0); 1168a7550b30SJaegeuk Kim if (!res) { 1169a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1170a3caa24bSJan Kara /* Update inode->i_flags - e.g. S_DAX may get disabled */ 1171a3caa24bSJan Kara ext4_set_inode_flags(inode); 1172a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1173a7550b30SJaegeuk Kim if (res) 1174a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1175a7550b30SJaegeuk Kim } 1176a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 11772f8f5e76SEric Biggers 11782f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 11792f8f5e76SEric Biggers goto retry; 1180a7550b30SJaegeuk Kim if (!res) 1181a7550b30SJaegeuk Kim res = res2; 1182a7550b30SJaegeuk Kim return res; 1183a7550b30SJaegeuk Kim } 1184a7550b30SJaegeuk Kim 1185a7550b30SJaegeuk Kim static int ext4_dummy_context(struct inode *inode) 1186a7550b30SJaegeuk Kim { 1187a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1188a7550b30SJaegeuk Kim } 1189a7550b30SJaegeuk Kim 1190a7550b30SJaegeuk Kim static unsigned ext4_max_namelen(struct inode *inode) 1191a7550b30SJaegeuk Kim { 1192a7550b30SJaegeuk Kim return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : 1193a7550b30SJaegeuk Kim EXT4_NAME_LEN; 1194a7550b30SJaegeuk Kim } 1195a7550b30SJaegeuk Kim 1196a7550b30SJaegeuk Kim static struct fscrypt_operations ext4_cryptops = { 1197a5d431efSEric Biggers .key_prefix = "ext4:", 1198a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1199a7550b30SJaegeuk Kim .prepare_context = ext4_prepare_context, 1200a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1201a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1202a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1203a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1204a7550b30SJaegeuk Kim .max_namelen = ext4_max_namelen, 1205a7550b30SJaegeuk Kim }; 1206a7550b30SJaegeuk Kim #else 1207a7550b30SJaegeuk Kim static struct fscrypt_operations ext4_cryptops = { 1208a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1209a7550b30SJaegeuk Kim }; 1210a7550b30SJaegeuk Kim #endif 1211a7550b30SJaegeuk Kim 1212ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1213689c958cSLi Xi static char *quotatypes[] = INITQFNAMES; 1214689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1215ac27a0ecSDave Kleikamp 1216617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1217617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1218617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1219617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1220617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 12216f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 12228c54ca9cSAl Viro const struct path *path); 1223ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1224617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1225617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1226ac27a0ecSDave Kleikamp size_t len, loff_t off); 1227617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1228ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 12297c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 12307c319d32SAditya Kali unsigned int flags); 12317c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 12328f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); 1233ac27a0ecSDave Kleikamp 123496c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 123596c7e0d9SJan Kara { 123696c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 123796c7e0d9SJan Kara } 123896c7e0d9SJan Kara 123961e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 124060e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1241617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1242617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1243617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1244617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1245a5b5ee32SJan Kara .write_info = ext4_write_info, 1246a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1247a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1248040cb378SLi Xi .get_projid = ext4_get_projid, 12498f0e8746STheodore Ts'o .get_next_id = ext4_get_next_id, 1250ac27a0ecSDave Kleikamp }; 1251ac27a0ecSDave Kleikamp 12520d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1253617ba13bSMingming Cao .quota_on = ext4_quota_on, 1254ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1255287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 12560a240339SJan Kara .get_state = dquot_get_state, 1257287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1258287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 12596332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 12606332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1261ac27a0ecSDave Kleikamp }; 1262ac27a0ecSDave Kleikamp #endif 1263ac27a0ecSDave Kleikamp 1264ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1265617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1266617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1267617ba13bSMingming Cao .write_inode = ext4_write_inode, 1268617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 12697ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12700930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1271617ba13bSMingming Cao .put_super = ext4_put_super, 1272617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1273c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1274c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1275617ba13bSMingming Cao .statfs = ext4_statfs, 1276617ba13bSMingming Cao .remount_fs = ext4_remount, 1277617ba13bSMingming Cao .show_options = ext4_show_options, 1278ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1279617ba13bSMingming Cao .quota_read = ext4_quota_read, 1280617ba13bSMingming Cao .quota_write = ext4_quota_write, 128196c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1282ac27a0ecSDave Kleikamp #endif 1283c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1284ac27a0ecSDave Kleikamp }; 1285ac27a0ecSDave Kleikamp 128639655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12871b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12881b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1289617ba13bSMingming Cao .get_parent = ext4_get_parent, 1290ac27a0ecSDave Kleikamp }; 1291ac27a0ecSDave Kleikamp 1292ac27a0ecSDave Kleikamp enum { 1293ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1294ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 129572578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1296ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 129772578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1298ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1299ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1300ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 13016ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1302ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13035a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1304ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 130549da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 13061449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1307670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 13081449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 13095328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1310744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1311fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1312c6d3d56dSDarrick J. Wong Opt_max_dir_size_kb, Opt_nojournal_checksum, 1313ac27a0ecSDave Kleikamp }; 1314ac27a0ecSDave Kleikamp 1315a447c093SSteven Whitehouse static const match_table_t tokens = { 1316ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1317ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1318ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1319ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1320ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1321ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1322ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1323ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1324ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1325ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1326ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1327ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1328ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1329ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 133072578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 133172578c33STheodore Ts'o {Opt_removed, "orlov"}, 1332ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1333ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1334ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1335ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1336e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 13375a916be1STheodore Ts'o {Opt_noload, "noload"}, 133872578c33STheodore Ts'o {Opt_removed, "nobh"}, 133972578c33STheodore Ts'o {Opt_removed, "bh"}, 1340ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 134130773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 134230773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1343ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1344ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1345818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1346c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1347818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1348ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1349ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1350ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1351ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13525bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13535bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1354ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1355ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1356ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1357ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1358ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1359ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13605a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1361ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1362ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1363ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1364ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 136549da9392SJan Kara {Opt_prjquota, "prjquota"}, 1366ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 136706705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 136806705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 136925ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1370923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1371c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 137264769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1373a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1374a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1375670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1376dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 137736ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 137836ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 13796fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13806fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1381240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1382b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1383afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 138406705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 138506705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1386744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1387744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13885328e635SEric Sandeen {Opt_discard, "discard"}, 13895328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1390fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1391fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1392fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1393df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 13946ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1395c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1396c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1397c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1398c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1399c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1400f3f12faaSJosef Bacik {Opt_err, NULL}, 1401ac27a0ecSDave Kleikamp }; 1402ac27a0ecSDave Kleikamp 1403617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1404ac27a0ecSDave Kleikamp { 1405617ba13bSMingming Cao ext4_fsblk_t sb_block; 1406ac27a0ecSDave Kleikamp char *options = (char *) *data; 1407ac27a0ecSDave Kleikamp 1408ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1409ac27a0ecSDave Kleikamp return 1; /* Default location */ 14100b8e58a1SAndreas Dilger 1411ac27a0ecSDave Kleikamp options += 3; 14120b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1413ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1414ac27a0ecSDave Kleikamp if (*options && *options != ',') { 14154776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1416ac27a0ecSDave Kleikamp (char *) *data); 1417ac27a0ecSDave Kleikamp return 1; 1418ac27a0ecSDave Kleikamp } 1419ac27a0ecSDave Kleikamp if (*options == ',') 1420ac27a0ecSDave Kleikamp options++; 1421ac27a0ecSDave Kleikamp *data = (void *) options; 14220b8e58a1SAndreas Dilger 1423ac27a0ecSDave Kleikamp return sb_block; 1424ac27a0ecSDave Kleikamp } 1425ac27a0ecSDave Kleikamp 1426b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1427437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1428437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1429b3881f74STheodore Ts'o 143056c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 143156c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 143256c50f11SDmitry Monakhov { 143356c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 143456c50f11SDmitry Monakhov char *qname; 143503dafb5fSChen Gang int ret = -1; 143656c50f11SDmitry Monakhov 143756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 143856c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 143956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 144056c50f11SDmitry Monakhov "Cannot change journaled " 144156c50f11SDmitry Monakhov "quota options when quota turned on"); 144257f73c2cSTheodore Ts'o return -1; 144356c50f11SDmitry Monakhov } 1444e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1445c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1446c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1447c325a67cSTheodore Ts'o return 1; 1448262b4662SJan Kara } 144956c50f11SDmitry Monakhov qname = match_strdup(args); 145056c50f11SDmitry Monakhov if (!qname) { 145156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 145256c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 145357f73c2cSTheodore Ts'o return -1; 145456c50f11SDmitry Monakhov } 145503dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 145603dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 145703dafb5fSChen Gang ret = 1; 145803dafb5fSChen Gang else 145956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 146003dafb5fSChen Gang "%s quota file already specified", 146103dafb5fSChen Gang QTYPE2NAME(qtype)); 146203dafb5fSChen Gang goto errout; 146356c50f11SDmitry Monakhov } 146403dafb5fSChen Gang if (strchr(qname, '/')) { 146556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 146656c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 146703dafb5fSChen Gang goto errout; 146856c50f11SDmitry Monakhov } 146903dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1470fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 147156c50f11SDmitry Monakhov return 1; 147203dafb5fSChen Gang errout: 147303dafb5fSChen Gang kfree(qname); 147403dafb5fSChen Gang return ret; 147556c50f11SDmitry Monakhov } 147656c50f11SDmitry Monakhov 147756c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 147856c50f11SDmitry Monakhov { 147956c50f11SDmitry Monakhov 148056c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 148156c50f11SDmitry Monakhov 148256c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 148356c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 148456c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 148556c50f11SDmitry Monakhov " when quota turned on"); 148657f73c2cSTheodore Ts'o return -1; 148756c50f11SDmitry Monakhov } 148803dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 148956c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 149056c50f11SDmitry Monakhov return 1; 149156c50f11SDmitry Monakhov } 149256c50f11SDmitry Monakhov #endif 149356c50f11SDmitry Monakhov 149426092bf5STheodore Ts'o #define MOPT_SET 0x0001 149526092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 149626092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 149726092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 149826092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 149926092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 150026092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 150126092bf5STheodore Ts'o #define MOPT_Q 0 150226092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 150326092bf5STheodore Ts'o #else 150426092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 150526092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 150626092bf5STheodore Ts'o #endif 150726092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 15088dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 15098dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 15108dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1511ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 151226092bf5STheodore Ts'o 151326092bf5STheodore Ts'o static const struct mount_opts { 151426092bf5STheodore Ts'o int token; 151526092bf5STheodore Ts'o int mount_opt; 151626092bf5STheodore Ts'o int flags; 151726092bf5STheodore Ts'o } ext4_mount_opts[] = { 151826092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 151926092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 152026092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 152126092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 152226092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 152326092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 15248dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 15258dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 15268dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 15278dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 152826092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 152926092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 15308dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 15318dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15328dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 153359d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1534c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1535c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 15368dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 15371e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 153826092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 15398dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 15401e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15418dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 154226092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 154326092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 154426092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 15458dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 15467915a861SAles Novak MOPT_NO_EXT2}, 15478dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 15487915a861SAles Novak MOPT_NO_EXT2}, 154926092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 155026092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 155126092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 155226092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 155326092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 155426092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 155526092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 155626092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 155726092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 155826092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1559923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 156026092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 15610efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 15620efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 15635ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 15645ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 15655ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 15668dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 15678dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 15688dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 15698dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 157026092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 157126092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 157226092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 157326092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 157426092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 157526092bf5STheodore Ts'o #else 157626092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 157726092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 157826092bf5STheodore Ts'o #endif 157926092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 158026092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1581670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 158226092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 158326092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 158426092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 158526092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 158626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 158749da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 158849da9392SJan Kara MOPT_SET | MOPT_Q}, 158926092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 159049da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 159149da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 159226092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 159326092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 159426092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 159526092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 159626092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 159726092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 159826092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1599df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 16006ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 160126092bf5STheodore Ts'o {Opt_err, 0, 0} 160226092bf5STheodore Ts'o }; 160326092bf5STheodore Ts'o 160426092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 160526092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 160626092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 160726092bf5STheodore Ts'o { 160826092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 160926092bf5STheodore Ts'o const struct mount_opts *m; 161008cefc7aSEric W. Biederman kuid_t uid; 161108cefc7aSEric W. Biederman kgid_t gid; 161226092bf5STheodore Ts'o int arg = 0; 161326092bf5STheodore Ts'o 161457f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 161557f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 161657f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 161757f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 161857f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 161957f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 162057f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 162157f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 162257f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 162357f73c2cSTheodore Ts'o #endif 162426092bf5STheodore Ts'o switch (token) { 1625f7048605STheodore Ts'o case Opt_noacl: 1626f7048605STheodore Ts'o case Opt_nouser_xattr: 1627f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1628f7048605STheodore Ts'o break; 162926092bf5STheodore Ts'o case Opt_sb: 163026092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 163126092bf5STheodore Ts'o case Opt_removed: 16325f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 163326092bf5STheodore Ts'o return 1; 163426092bf5STheodore Ts'o case Opt_abort: 163526092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 163626092bf5STheodore Ts'o return 1; 163726092bf5STheodore Ts'o case Opt_i_version: 163826092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 163926092bf5STheodore Ts'o return 1; 1640a26f4992STheodore Ts'o case Opt_lazytime: 1641a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1642a26f4992STheodore Ts'o return 1; 1643a26f4992STheodore Ts'o case Opt_nolazytime: 1644a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1645a26f4992STheodore Ts'o return 1; 164626092bf5STheodore Ts'o } 164726092bf5STheodore Ts'o 16485f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 16495f3633e3SJan Kara if (token == m->token) 16505f3633e3SJan Kara break; 16515f3633e3SJan Kara 16525f3633e3SJan Kara if (m->token == Opt_err) { 16535f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 16545f3633e3SJan Kara "or missing value", opt); 16555f3633e3SJan Kara return -1; 16565f3633e3SJan Kara } 16575f3633e3SJan Kara 16588dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 16598dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 16608dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 16618dc0aa8cSTheodore Ts'o return -1; 16628dc0aa8cSTheodore Ts'o } 16638dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 16648dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 16658dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 16668dc0aa8cSTheodore Ts'o return -1; 16678dc0aa8cSTheodore Ts'o } 16688dc0aa8cSTheodore Ts'o 1669ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 16700efb3b23SJan Kara return -1; 167126092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 167226092bf5STheodore Ts'o return -1; 1673c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1674c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 167526092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 16761e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 16771e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1678c93cf2d7SDmitry Monakhov } else 1679c93cf2d7SDmitry Monakhov return -1; 1680c93cf2d7SDmitry Monakhov } 168126092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 168226092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 168326092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 168426092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 168526092bf5STheodore Ts'o "options when quota turned on"); 168626092bf5STheodore Ts'o return -1; 168726092bf5STheodore Ts'o } 168826092bf5STheodore Ts'o 168926092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 169026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 169126092bf5STheodore Ts'o } else if (token == Opt_commit) { 169226092bf5STheodore Ts'o if (arg == 0) 169326092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 169426092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 1695670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 1696670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 169726092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 169826092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 169926092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 170026092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 170126092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1702e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1703e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1704e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1705e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 170626092bf5STheodore Ts'o return -1; 170726092bf5STheodore Ts'o } 170826092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 170926092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 171026092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 171126092bf5STheodore Ts'o if (!args->from) 171226092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 171326092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1714df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1715df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 171626092bf5STheodore Ts'o } else if (token == Opt_stripe) { 171726092bf5STheodore Ts'o sbi->s_stripe = arg; 17180efb3b23SJan Kara } else if (token == Opt_resuid) { 17190efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 17200efb3b23SJan Kara if (!uid_valid(uid)) { 17215f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 17220efb3b23SJan Kara return -1; 17230efb3b23SJan Kara } 17240efb3b23SJan Kara sbi->s_resuid = uid; 17250efb3b23SJan Kara } else if (token == Opt_resgid) { 17260efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 17270efb3b23SJan Kara if (!gid_valid(gid)) { 17285f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 17290efb3b23SJan Kara return -1; 17300efb3b23SJan Kara } 17310efb3b23SJan Kara sbi->s_resgid = gid; 17320efb3b23SJan Kara } else if (token == Opt_journal_dev) { 17330efb3b23SJan Kara if (is_remount) { 17340efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 17350efb3b23SJan Kara "Cannot specify journal on remount"); 17360efb3b23SJan Kara return -1; 17370efb3b23SJan Kara } 17380efb3b23SJan Kara *journal_devnum = arg; 1739ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1740ad4eec61SEric Sandeen char *journal_path; 1741ad4eec61SEric Sandeen struct inode *journal_inode; 1742ad4eec61SEric Sandeen struct path path; 1743ad4eec61SEric Sandeen int error; 1744ad4eec61SEric Sandeen 1745ad4eec61SEric Sandeen if (is_remount) { 1746ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1747ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1748ad4eec61SEric Sandeen return -1; 1749ad4eec61SEric Sandeen } 1750ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1751ad4eec61SEric Sandeen if (!journal_path) { 1752ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1753ad4eec61SEric Sandeen "journal device string"); 1754ad4eec61SEric Sandeen return -1; 1755ad4eec61SEric Sandeen } 1756ad4eec61SEric Sandeen 1757ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1758ad4eec61SEric Sandeen if (error) { 1759ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1760ad4eec61SEric Sandeen "journal device path: error %d", error); 1761ad4eec61SEric Sandeen kfree(journal_path); 1762ad4eec61SEric Sandeen return -1; 1763ad4eec61SEric Sandeen } 1764ad4eec61SEric Sandeen 17652b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1766ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1767ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1768ad4eec61SEric Sandeen "is not a block device", journal_path); 1769ad4eec61SEric Sandeen path_put(&path); 1770ad4eec61SEric Sandeen kfree(journal_path); 1771ad4eec61SEric Sandeen return -1; 1772ad4eec61SEric Sandeen } 1773ad4eec61SEric Sandeen 1774ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1775ad4eec61SEric Sandeen path_put(&path); 1776ad4eec61SEric Sandeen kfree(journal_path); 17770efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 17780efb3b23SJan Kara if (arg > 7) { 17795f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 17800efb3b23SJan Kara " (must be 0-7)"); 17810efb3b23SJan Kara return -1; 17820efb3b23SJan Kara } 17830efb3b23SJan Kara *journal_ioprio = 17840efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 17856ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 17866ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 17876ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 17886ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 17896ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 17906ddb2447STheodore Ts'o #else 17916ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 17926ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 17936ddb2447STheodore Ts'o #endif 179426092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 179526092bf5STheodore Ts'o if (is_remount) { 179626092bf5STheodore Ts'o if (!sbi->s_journal) 179726092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 17985f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 179926092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 180026092bf5STheodore Ts'o "Cannot change data mode on remount"); 180126092bf5STheodore Ts'o return -1; 180226092bf5STheodore Ts'o } 180326092bf5STheodore Ts'o } else { 180426092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 180526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 180626092bf5STheodore Ts'o } 180726092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 180826092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 180926092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 181026092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 18115f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 18125f3633e3SJan Kara "quota options when quota turned on"); 181326092bf5STheodore Ts'o return -1; 181426092bf5STheodore Ts'o } 1815e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1816c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1817c325a67cSTheodore Ts'o "Quota format mount options ignored " 1818262b4662SJan Kara "when QUOTA feature is enabled"); 1819c325a67cSTheodore Ts'o return 1; 1820262b4662SJan Kara } 182126092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 182226092bf5STheodore Ts'o #endif 1823923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1824ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1825ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1826ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1827ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1828ef83b6e8SDan Williams #else 1829923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1830923ae0ffSRoss Zwisler return -1; 1831923ae0ffSRoss Zwisler #endif 18327915a861SAles Novak } else if (token == Opt_data_err_abort) { 18337915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 18347915a861SAles Novak } else if (token == Opt_data_err_ignore) { 18357915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 183626092bf5STheodore Ts'o } else { 183726092bf5STheodore Ts'o if (!args->from) 183826092bf5STheodore Ts'o arg = 1; 183926092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 184026092bf5STheodore Ts'o arg = !arg; 184126092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 184226092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 184326092bf5STheodore Ts'o "buggy handling of option %s", opt); 184426092bf5STheodore Ts'o WARN_ON(1); 184526092bf5STheodore Ts'o return -1; 184626092bf5STheodore Ts'o } 184726092bf5STheodore Ts'o if (arg != 0) 184826092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 184926092bf5STheodore Ts'o else 185026092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 185126092bf5STheodore Ts'o } 185226092bf5STheodore Ts'o return 1; 185326092bf5STheodore Ts'o } 185426092bf5STheodore Ts'o 1855ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1856c3191067STheodore Ts'o unsigned long *journal_devnum, 1857b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1858661aa520SEric Sandeen int is_remount) 1859ac27a0ecSDave Kleikamp { 1860617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1861ac27a0ecSDave Kleikamp char *p; 1862ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 186326092bf5STheodore Ts'o int token; 1864ac27a0ecSDave Kleikamp 1865ac27a0ecSDave Kleikamp if (!options) 1866ac27a0ecSDave Kleikamp return 1; 1867ac27a0ecSDave Kleikamp 1868ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1869ac27a0ecSDave Kleikamp if (!*p) 1870ac27a0ecSDave Kleikamp continue; 187115121c18SEric Sandeen /* 187215121c18SEric Sandeen * Initialize args struct so we know whether arg was 187315121c18SEric Sandeen * found; some options take optional arguments. 187415121c18SEric Sandeen */ 1875caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1876ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 187726092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 187826092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1879ac27a0ecSDave Kleikamp return 0; 1880ac27a0ecSDave Kleikamp } 1881ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 188249da9392SJan Kara /* 188349da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 188449da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 188549da9392SJan Kara * to support legacy quotas in quota files. 188649da9392SJan Kara */ 188749da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 188849da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 188949da9392SJan Kara "Cannot enable project quota enforcement."); 189049da9392SJan Kara return 0; 189149da9392SJan Kara } 189249da9392SJan Kara if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1893482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1894fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1895ac27a0ecSDave Kleikamp 1896482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1897fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1898ac27a0ecSDave Kleikamp 189956c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1900b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1901b31e1552SEric Sandeen "format mixing"); 1902ac27a0ecSDave Kleikamp return 0; 1903ac27a0ecSDave Kleikamp } 1904ac27a0ecSDave Kleikamp 1905ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1906b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1907b31e1552SEric Sandeen "not specified"); 1908ac27a0ecSDave Kleikamp return 0; 1909ac27a0ecSDave Kleikamp } 1910ac27a0ecSDave Kleikamp } 1911ac27a0ecSDave Kleikamp #endif 1912261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1913261cb20cSJan Kara int blocksize = 1914261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1915261cb20cSJan Kara 191609cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 1917261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1918261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1919261cb20cSJan Kara return 0; 1920261cb20cSJan Kara } 1921261cb20cSJan Kara } 1922ac27a0ecSDave Kleikamp return 1; 1923ac27a0ecSDave Kleikamp } 1924ac27a0ecSDave Kleikamp 19252adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 19262adf6da8STheodore Ts'o struct super_block *sb) 19272adf6da8STheodore Ts'o { 19282adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 19292adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 19302adf6da8STheodore Ts'o 19312adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 19322adf6da8STheodore Ts'o char *fmtname = ""; 19332adf6da8STheodore Ts'o 19342adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 19352adf6da8STheodore Ts'o case QFMT_VFS_OLD: 19362adf6da8STheodore Ts'o fmtname = "vfsold"; 19372adf6da8STheodore Ts'o break; 19382adf6da8STheodore Ts'o case QFMT_VFS_V0: 19392adf6da8STheodore Ts'o fmtname = "vfsv0"; 19402adf6da8STheodore Ts'o break; 19412adf6da8STheodore Ts'o case QFMT_VFS_V1: 19422adf6da8STheodore Ts'o fmtname = "vfsv1"; 19432adf6da8STheodore Ts'o break; 19442adf6da8STheodore Ts'o } 19452adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 19462adf6da8STheodore Ts'o } 19472adf6da8STheodore Ts'o 19482adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 1949a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 19502adf6da8STheodore Ts'o 19512adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 1952a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 19532adf6da8STheodore Ts'o #endif 19542adf6da8STheodore Ts'o } 19552adf6da8STheodore Ts'o 19565a916be1STheodore Ts'o static const char *token2str(int token) 19575a916be1STheodore Ts'o { 195850df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 19595a916be1STheodore Ts'o 19605a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 19615a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 19625a916be1STheodore Ts'o break; 19635a916be1STheodore Ts'o return t->pattern; 19645a916be1STheodore Ts'o } 19655a916be1STheodore Ts'o 19662adf6da8STheodore Ts'o /* 19672adf6da8STheodore Ts'o * Show an option if 19682adf6da8STheodore Ts'o * - it's set to a non-default value OR 19692adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 19702adf6da8STheodore Ts'o */ 197166acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 197266acdcf4STheodore Ts'o int nodefs) 19732adf6da8STheodore Ts'o { 19742adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 19752adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 197666acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 19775a916be1STheodore Ts'o const struct mount_opts *m; 197866acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 19792adf6da8STheodore Ts'o 198066acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 198166acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 19822adf6da8STheodore Ts'o 19832adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 19845a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 19855a916be1STheodore Ts'o 19865a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 19875a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 19885a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 19895a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 19905a916be1STheodore Ts'o continue; 199166acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 19925a916be1STheodore Ts'o continue; /* skip if same as the default */ 19935a916be1STheodore Ts'o if ((want_set && 19945a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 19955a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 19965a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 19975a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 19985a916be1STheodore Ts'o } 19995a916be1STheodore Ts'o 200008cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 20015a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 200208cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 200308cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 200408cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 20055a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 200608cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 200708cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 200866acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 20095a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 20105a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 20112adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 20125a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 20132adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 20145a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 201566acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 20165a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 201766acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 20185a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 201966acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 20205a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 20212adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 20225a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 202366acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 20245a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 202566acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 20262adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 20275a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 20282adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 20295a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 20302adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 20315a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 20325a916be1STheodore Ts'o } 203366acdcf4STheodore Ts'o if (nodefs || 203466acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 20355a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 20362adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 20372adf6da8STheodore Ts'o 203866acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 203966acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 20405a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2041df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2042df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 20437915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 20447915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 20452adf6da8STheodore Ts'o 20462adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 20472adf6da8STheodore Ts'o return 0; 20482adf6da8STheodore Ts'o } 20492adf6da8STheodore Ts'o 205066acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 205166acdcf4STheodore Ts'o { 205266acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 205366acdcf4STheodore Ts'o } 205466acdcf4STheodore Ts'o 2055ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 205666acdcf4STheodore Ts'o { 205766acdcf4STheodore Ts'o struct super_block *sb = seq->private; 205866acdcf4STheodore Ts'o int rc; 205966acdcf4STheodore Ts'o 206066acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 206166acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 206266acdcf4STheodore Ts'o seq_puts(seq, "\n"); 206366acdcf4STheodore Ts'o return rc; 206466acdcf4STheodore Ts'o } 206566acdcf4STheodore Ts'o 2066617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2067ac27a0ecSDave Kleikamp int read_only) 2068ac27a0ecSDave Kleikamp { 2069617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2070ac27a0ecSDave Kleikamp int res = 0; 2071ac27a0ecSDave Kleikamp 2072617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2073b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2074b31e1552SEric Sandeen "forcing read-only mode"); 2075ac27a0ecSDave Kleikamp res = MS_RDONLY; 2076ac27a0ecSDave Kleikamp } 2077ac27a0ecSDave Kleikamp if (read_only) 2078281b5995STheodore Ts'o goto done; 2079617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2080b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2081b31e1552SEric Sandeen "running e2fsck is recommended"); 2082c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2083b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2084b31e1552SEric Sandeen "warning: mounting fs with errors, " 2085b31e1552SEric Sandeen "running e2fsck is recommended"); 2086ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2087ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2088ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2089b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2090b31e1552SEric Sandeen "warning: maximal mount count reached, " 2091b31e1552SEric Sandeen "running e2fsck is recommended"); 2092ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 2093ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 2094ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 2095b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2096b31e1552SEric Sandeen "warning: checktime reached, " 2097b31e1552SEric Sandeen "running e2fsck is recommended"); 20980390131bSFrank Mayhar if (!sbi->s_journal) 2099216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2100ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2101617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2102e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 2103ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 2104617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 21050390131bSFrank Mayhar if (sbi->s_journal) 2106e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2107ac27a0ecSDave Kleikamp 2108e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2109281b5995STheodore Ts'o done: 2110ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2111a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2112a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2113ac27a0ecSDave Kleikamp sb->s_blocksize, 2114ac27a0ecSDave Kleikamp sbi->s_groups_count, 2115617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2116617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2117a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2118ac27a0ecSDave Kleikamp 21197abc52c2SDan Magenheimer cleancache_init_fs(sb); 2120ac27a0ecSDave Kleikamp return res; 2121ac27a0ecSDave Kleikamp } 2122ac27a0ecSDave Kleikamp 2123117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2124117fff10STheodore Ts'o { 2125117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2126117fff10STheodore Ts'o struct flex_groups *new_groups; 2127117fff10STheodore Ts'o int size; 2128117fff10STheodore Ts'o 2129117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2130117fff10STheodore Ts'o return 0; 2131117fff10STheodore Ts'o 2132117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2133117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2134117fff10STheodore Ts'o return 0; 2135117fff10STheodore Ts'o 2136117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2137117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 2138117fff10STheodore Ts'o if (!new_groups) { 2139117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2140117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2141117fff10STheodore Ts'o return -ENOMEM; 2142117fff10STheodore Ts'o } 2143117fff10STheodore Ts'o 2144117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2145117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2146117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2147117fff10STheodore Ts'o sizeof(struct flex_groups))); 2148b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2149117fff10STheodore Ts'o } 2150117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2151117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2152117fff10STheodore Ts'o return 0; 2153117fff10STheodore Ts'o } 2154117fff10STheodore Ts'o 2155772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2156772cb7c8SJose R. Santos { 2157772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2158772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2159772cb7c8SJose R. Santos ext4_group_t flex_group; 2160117fff10STheodore Ts'o int i, err; 2161772cb7c8SJose R. Santos 2162503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2163d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2164772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2165772cb7c8SJose R. Santos return 1; 2166772cb7c8SJose R. Santos } 2167772cb7c8SJose R. Santos 2168117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2169117fff10STheodore Ts'o if (err) 2170772cb7c8SJose R. Santos goto failed; 2171772cb7c8SJose R. Santos 2172772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 217388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2174772cb7c8SJose R. Santos 2175772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 21767ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 21777ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 217890ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 217924aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 21807ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 21817ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2182772cb7c8SJose R. Santos } 2183772cb7c8SJose R. Santos 2184772cb7c8SJose R. Santos return 1; 2185772cb7c8SJose R. Santos failed: 2186772cb7c8SJose R. Santos return 0; 2187772cb7c8SJose R. Santos } 2188772cb7c8SJose R. Santos 2189e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2190717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2191717d50e4SAndreas Dilger { 2192b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2193717d50e4SAndreas Dilger __u16 crc = 0; 2194717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2195e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2196717d50e4SAndreas Dilger 21979aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2198feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2199feb0ab32SDarrick J. Wong __u32 csum32; 2200b47820edSDaeho Jeong __u16 dummy_csum = 0; 2201feb0ab32SDarrick J. Wong 2202feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2203feb0ab32SDarrick J. Wong sizeof(le_group)); 2204b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2205b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2206b47820edSDaeho Jeong sizeof(dummy_csum)); 2207b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2208b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2209b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2210b47820edSDaeho Jeong sbi->s_desc_size - offset); 2211feb0ab32SDarrick J. Wong 2212feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2213feb0ab32SDarrick J. Wong goto out; 2214feb0ab32SDarrick J. Wong } 2215feb0ab32SDarrick J. Wong 2216feb0ab32SDarrick J. Wong /* old crc16 code */ 2217e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2218813d32f9SDarrick J. Wong return 0; 2219813d32f9SDarrick J. Wong 2220717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2221717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2222717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2223717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2224717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2225e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2226717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2227717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2228717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2229717d50e4SAndreas Dilger offset); 2230717d50e4SAndreas Dilger 2231feb0ab32SDarrick J. Wong out: 2232717d50e4SAndreas Dilger return cpu_to_le16(crc); 2233717d50e4SAndreas Dilger } 2234717d50e4SAndreas Dilger 2235feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2236717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2237717d50e4SAndreas Dilger { 2238feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2239e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2240717d50e4SAndreas Dilger return 0; 2241717d50e4SAndreas Dilger 2242717d50e4SAndreas Dilger return 1; 2243717d50e4SAndreas Dilger } 2244717d50e4SAndreas Dilger 2245feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2246feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2247feb0ab32SDarrick J. Wong { 2248feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2249feb0ab32SDarrick J. Wong return; 2250e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2251feb0ab32SDarrick J. Wong } 2252feb0ab32SDarrick J. Wong 2253ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2254bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2255829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2256bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2257ac27a0ecSDave Kleikamp { 2258617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2259617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2260617ba13bSMingming Cao ext4_fsblk_t last_block; 2261bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2262bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2263bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2264ce421581SJose R. Santos int flexbg_flag = 0; 2265bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2266ac27a0ecSDave Kleikamp 2267e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2268ce421581SJose R. Santos flexbg_flag = 1; 2269ce421581SJose R. Santos 2270617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2271ac27a0ecSDave Kleikamp 2272197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2273197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2274197cd65aSAkinobu Mita 2275ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2276bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2277ac27a0ecSDave Kleikamp else 2278ac27a0ecSDave Kleikamp last_block = first_block + 2279617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2280ac27a0ecSDave Kleikamp 2281bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2282bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2283bfff6873SLukas Czerner grp = i; 2284bfff6873SLukas Czerner 22858fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2286829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2287829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2288829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2289829fa70dSTheodore Ts'o "superblock", i); 2290829fa70dSTheodore Ts'o } 22912b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2292b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2293a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2294b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2295ac27a0ecSDave Kleikamp return 0; 2296ac27a0ecSDave Kleikamp } 22978fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2298829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2299829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2300829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2301829fa70dSTheodore Ts'o "superblock", i); 2302829fa70dSTheodore Ts'o } 23032b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2304b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2305a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2306b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2307ac27a0ecSDave Kleikamp return 0; 2308ac27a0ecSDave Kleikamp } 23098fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2310829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2311829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2312829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2313829fa70dSTheodore Ts'o "superblock", i); 2314829fa70dSTheodore Ts'o } 2315bd81d8eeSLaurent Vivier if (inode_table < first_block || 23162b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2317b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2318a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2319b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2320ac27a0ecSDave Kleikamp return 0; 2321ac27a0ecSDave Kleikamp } 2322955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2323feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2324b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2325b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2326e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2327fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 23287ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2329955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2330717d50e4SAndreas Dilger return 0; 2331717d50e4SAndreas Dilger } 23327ee1ec4cSLi Zefan } 2333955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2334ce421581SJose R. Santos if (!flexbg_flag) 2335617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2336ac27a0ecSDave Kleikamp } 2337bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2338bfff6873SLukas Czerner *first_not_zeroed = grp; 2339ac27a0ecSDave Kleikamp return 1; 2340ac27a0ecSDave Kleikamp } 2341ac27a0ecSDave Kleikamp 2342617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2343ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2344ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2345ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2346ac27a0ecSDave Kleikamp * 2347ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2348ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2349ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2350ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2351ac27a0ecSDave Kleikamp * 2352ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2353ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2354ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2355617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2356ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2357ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2358ac27a0ecSDave Kleikamp */ 2359617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2360617ba13bSMingming Cao struct ext4_super_block *es) 2361ac27a0ecSDave Kleikamp { 2362ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 23632c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2364ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2365ac27a0ecSDave Kleikamp int i; 2366ac27a0ecSDave Kleikamp #endif 2367ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2368ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2369ac27a0ecSDave Kleikamp return; 2370ac27a0ecSDave Kleikamp } 2371ac27a0ecSDave Kleikamp 2372a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2373b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2374b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2375a8f48a95SEric Sandeen return; 2376a8f48a95SEric Sandeen } 2377a8f48a95SEric Sandeen 2378d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2379d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2380d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2381d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2382d39195c3SAmir Goldstein return; 2383d39195c3SAmir Goldstein } 2384d39195c3SAmir Goldstein 2385617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2386c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2387c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 238884474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2389ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2390ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2391c25f9bc6SEric Sandeen } 2392ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2393ac27a0ecSDave Kleikamp return; 2394ac27a0ecSDave Kleikamp } 2395ac27a0ecSDave Kleikamp 2396ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2397b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2398ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2399ac27a0ecSDave Kleikamp } 2400ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2401ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2402ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2403ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2404a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2405617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2406617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2407ac27a0ecSDave Kleikamp if (ret < 0) 2408b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2409b31e1552SEric Sandeen "Cannot turn on journaled " 2410b31e1552SEric Sandeen "quota: error %d", ret); 2411ac27a0ecSDave Kleikamp } 2412ac27a0ecSDave Kleikamp } 2413ac27a0ecSDave Kleikamp #endif 2414ac27a0ecSDave Kleikamp 2415ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2416ac27a0ecSDave Kleikamp struct inode *inode; 2417ac27a0ecSDave Kleikamp 2418c65d5c6cSVegard Nossum /* 2419c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2420c65d5c6cSVegard Nossum * so, skip the rest. 2421c65d5c6cSVegard Nossum */ 2422c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2423c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2424c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2425c65d5c6cSVegard Nossum break; 2426c65d5c6cSVegard Nossum } 2427c65d5c6cSVegard Nossum 242897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 242997bd42b9SJosef Bacik if (IS_ERR(inode)) { 2430ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2431ac27a0ecSDave Kleikamp break; 2432ac27a0ecSDave Kleikamp } 2433ac27a0ecSDave Kleikamp 2434617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2435871a2931SChristoph Hellwig dquot_initialize(inode); 2436ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2437566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2438b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2439b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 244046e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2441e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2442ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 24435955102cSAl Viro inode_lock(inode); 244455f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 24452c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 24462c98eb5eSTheodore Ts'o if (ret) 24472c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 24485955102cSAl Viro inode_unlock(inode); 2449ac27a0ecSDave Kleikamp nr_truncates++; 2450ac27a0ecSDave Kleikamp } else { 2451566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2452b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2453b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 245446e665e9SHarvey Harrison __func__, inode->i_ino); 2455ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2456ac27a0ecSDave Kleikamp inode->i_ino); 2457ac27a0ecSDave Kleikamp nr_orphans++; 2458ac27a0ecSDave Kleikamp } 2459ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2460ac27a0ecSDave Kleikamp } 2461ac27a0ecSDave Kleikamp 2462ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2463ac27a0ecSDave Kleikamp 2464ac27a0ecSDave Kleikamp if (nr_orphans) 2465b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2466b31e1552SEric Sandeen PLURAL(nr_orphans)); 2467ac27a0ecSDave Kleikamp if (nr_truncates) 2468b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2469b31e1552SEric Sandeen PLURAL(nr_truncates)); 2470ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2471ac27a0ecSDave Kleikamp /* Turn quotas off */ 2472a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2473ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2474287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2475ac27a0ecSDave Kleikamp } 2476ac27a0ecSDave Kleikamp #endif 2477ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2478ac27a0ecSDave Kleikamp } 24790b8e58a1SAndreas Dilger 2480cd2291a4SEric Sandeen /* 2481cd2291a4SEric Sandeen * Maximal extent format file size. 2482cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2483cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2484cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2485cd2291a4SEric Sandeen * so that won't be a limiting factor. 2486cd2291a4SEric Sandeen * 2487f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2488f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2489f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2490f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2491f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2492f17722f9SLukas Czerner * 2493cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2494cd2291a4SEric Sandeen */ 2495f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2496cd2291a4SEric Sandeen { 2497cd2291a4SEric Sandeen loff_t res; 2498cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2499cd2291a4SEric Sandeen 2500cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2501f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2502cd2291a4SEric Sandeen /* 250390c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2504cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2505cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2506cd2291a4SEric Sandeen */ 2507cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2508cd2291a4SEric Sandeen 2509cd2291a4SEric Sandeen /* total blocks in file system block size */ 2510cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2511cd2291a4SEric Sandeen upper_limit <<= blkbits; 2512cd2291a4SEric Sandeen } 2513cd2291a4SEric Sandeen 2514f17722f9SLukas Czerner /* 2515f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2516f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2517f17722f9SLukas Czerner * size 2518f17722f9SLukas Czerner */ 2519f17722f9SLukas Czerner res = (1LL << 32) - 1; 2520cd2291a4SEric Sandeen res <<= blkbits; 2521cd2291a4SEric Sandeen 2522cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2523cd2291a4SEric Sandeen if (res > upper_limit) 2524cd2291a4SEric Sandeen res = upper_limit; 2525cd2291a4SEric Sandeen 2526cd2291a4SEric Sandeen return res; 2527cd2291a4SEric Sandeen } 2528ac27a0ecSDave Kleikamp 2529ac27a0ecSDave Kleikamp /* 2530cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 25310fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 25320fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2533ac27a0ecSDave Kleikamp */ 2534f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2535ac27a0ecSDave Kleikamp { 2536617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 25370fc1b451SAneesh Kumar K.V int meta_blocks; 25380fc1b451SAneesh Kumar K.V loff_t upper_limit; 25390b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 25400b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 25410b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 25420b8e58a1SAndreas Dilger * 25430b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 25440b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 25450fc1b451SAneesh Kumar K.V */ 25460fc1b451SAneesh Kumar K.V 2547f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 25480fc1b451SAneesh Kumar K.V /* 254990c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 25500b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 25510b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 25520fc1b451SAneesh Kumar K.V */ 25530fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 25540fc1b451SAneesh Kumar K.V 25550fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 25560fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 25570fc1b451SAneesh Kumar K.V 25580fc1b451SAneesh Kumar K.V } else { 25598180a562SAneesh Kumar K.V /* 25608180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 25618180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 25628180a562SAneesh Kumar K.V * represent total number of blocks in 25638180a562SAneesh Kumar K.V * file system block size 25648180a562SAneesh Kumar K.V */ 25650fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 25660fc1b451SAneesh Kumar K.V 25670fc1b451SAneesh Kumar K.V } 25680fc1b451SAneesh Kumar K.V 25690fc1b451SAneesh Kumar K.V /* indirect blocks */ 25700fc1b451SAneesh Kumar K.V meta_blocks = 1; 25710fc1b451SAneesh Kumar K.V /* double indirect blocks */ 25720fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 25730fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 25740fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 25750fc1b451SAneesh Kumar K.V 25760fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 25770fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2578ac27a0ecSDave Kleikamp 2579ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2580ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2581ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2582ac27a0ecSDave Kleikamp res <<= bits; 2583ac27a0ecSDave Kleikamp if (res > upper_limit) 2584ac27a0ecSDave Kleikamp res = upper_limit; 25850fc1b451SAneesh Kumar K.V 25860fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 25870fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 25880fc1b451SAneesh Kumar K.V 2589ac27a0ecSDave Kleikamp return res; 2590ac27a0ecSDave Kleikamp } 2591ac27a0ecSDave Kleikamp 2592617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 259370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2594ac27a0ecSDave Kleikamp { 2595617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2596fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2597ac27a0ecSDave Kleikamp int has_super = 0; 2598ac27a0ecSDave Kleikamp 2599ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2600ac27a0ecSDave Kleikamp 2601e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 260270bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2603ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2604617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2605ac27a0ecSDave Kleikamp has_super = 1; 26060b8e58a1SAndreas Dilger 2607bd63f6b0SDarrick J. Wong /* 2608bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2609bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2610bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2611bd63f6b0SDarrick J. Wong * compensate. 2612bd63f6b0SDarrick J. Wong */ 2613bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2614bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2615bd63f6b0SDarrick J. Wong has_super++; 2616bd63f6b0SDarrick J. Wong 2617617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2618ac27a0ecSDave Kleikamp } 2619ac27a0ecSDave Kleikamp 2620c9de560dSAlex Tomas /** 2621c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2622c9de560dSAlex Tomas * @sbi: In memory super block info 2623c9de560dSAlex Tomas * 2624c9de560dSAlex Tomas * If we have specified it via mount option, then 2625c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2626c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2627c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2628c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2629c9de560dSAlex Tomas * 2630c9de560dSAlex Tomas */ 2631c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2632c9de560dSAlex Tomas { 2633c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2634c9de560dSAlex Tomas unsigned long stripe_width = 2635c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 26363eb08658SDan Ehrenberg int ret; 2637c9de560dSAlex Tomas 2638c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 26393eb08658SDan Ehrenberg ret = sbi->s_stripe; 2640*5469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 26413eb08658SDan Ehrenberg ret = stripe_width; 2642*5469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 26433eb08658SDan Ehrenberg ret = stride; 26443eb08658SDan Ehrenberg else 26453eb08658SDan Ehrenberg ret = 0; 2646c9de560dSAlex Tomas 26473eb08658SDan Ehrenberg /* 26483eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 26493eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 26503eb08658SDan Ehrenberg */ 26513eb08658SDan Ehrenberg if (ret <= 1) 26523eb08658SDan Ehrenberg ret = 0; 2653c9de560dSAlex Tomas 26543eb08658SDan Ehrenberg return ret; 2655c9de560dSAlex Tomas } 2656ac27a0ecSDave Kleikamp 2657a13fb1a4SEric Sandeen /* 2658a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2659a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2660a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2661a13fb1a4SEric Sandeen * 0 if it cannot be. 2662a13fb1a4SEric Sandeen */ 2663a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2664a13fb1a4SEric Sandeen { 2665e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2666a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2667a13fb1a4SEric Sandeen "Couldn't mount because of " 2668a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2669a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2670a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2671a13fb1a4SEric Sandeen return 0; 2672a13fb1a4SEric Sandeen } 2673a13fb1a4SEric Sandeen 2674a13fb1a4SEric Sandeen if (readonly) 2675a13fb1a4SEric Sandeen return 1; 2676a13fb1a4SEric Sandeen 2677e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 26782cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 26792cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 26802cb5cc8bSDarrick J. Wong return 1; 26812cb5cc8bSDarrick J. Wong } 26822cb5cc8bSDarrick J. Wong 2683a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2684e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2685a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2686a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2687a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2688a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2689a13fb1a4SEric Sandeen return 0; 2690a13fb1a4SEric Sandeen } 2691a13fb1a4SEric Sandeen /* 2692a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2693a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2694a13fb1a4SEric Sandeen */ 2695e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2696a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2697a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2698a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2699a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2700a13fb1a4SEric Sandeen return 0; 2701a13fb1a4SEric Sandeen } 2702a13fb1a4SEric Sandeen } 2703e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2704bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2705bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2706bab08ab9STheodore Ts'o "extents feature\n"); 2707bab08ab9STheodore Ts'o return 0; 2708bab08ab9STheodore Ts'o } 27097c319d32SAditya Kali 27107c319d32SAditya Kali #ifndef CONFIG_QUOTA 2711e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 27127c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 27137c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 27147c319d32SAditya Kali "without CONFIG_QUOTA"); 27157c319d32SAditya Kali return 0; 27167c319d32SAditya Kali } 2717689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2718689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2719689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2720689c958cSLi Xi "without CONFIG_QUOTA"); 2721689c958cSLi Xi return 0; 2722689c958cSLi Xi } 27237c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2724a13fb1a4SEric Sandeen return 1; 2725a13fb1a4SEric Sandeen } 2726a13fb1a4SEric Sandeen 272766e61a9eSTheodore Ts'o /* 272866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 272966e61a9eSTheodore Ts'o * on the file system 273066e61a9eSTheodore Ts'o */ 273166e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 273266e61a9eSTheodore Ts'o { 273366e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 273466e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 273566e61a9eSTheodore Ts'o struct ext4_super_block *es; 273666e61a9eSTheodore Ts'o 273766e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 273866e61a9eSTheodore Ts'o es = sbi->s_es; 273966e61a9eSTheodore Ts'o 274066e61a9eSTheodore Ts'o if (es->s_error_count) 2741ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2742ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 274366e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 274466e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2745ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 274666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 274766e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 274866e61a9eSTheodore Ts'o es->s_first_error_func, 274966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 275066e61a9eSTheodore Ts'o if (es->s_first_error_ino) 2751651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 275266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 275366e61a9eSTheodore Ts'o if (es->s_first_error_block) 2754651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 275566e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 2756651e1c3bSJoe Perches printk(KERN_CONT "\n"); 275766e61a9eSTheodore Ts'o } 275866e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2759ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 276066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 276166e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 276266e61a9eSTheodore Ts'o es->s_last_error_func, 276366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 276466e61a9eSTheodore Ts'o if (es->s_last_error_ino) 2765651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 276666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 276766e61a9eSTheodore Ts'o if (es->s_last_error_block) 2768651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 276966e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 2770651e1c3bSJoe Perches printk(KERN_CONT "\n"); 277166e61a9eSTheodore Ts'o } 277266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 277366e61a9eSTheodore Ts'o } 277466e61a9eSTheodore Ts'o 2775bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2776bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2777bfff6873SLukas Czerner { 2778bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2779bfff6873SLukas Czerner ext4_group_t group, ngroups; 2780bfff6873SLukas Czerner struct super_block *sb; 2781bfff6873SLukas Czerner unsigned long timeout = 0; 2782bfff6873SLukas Czerner int ret = 0; 2783bfff6873SLukas Czerner 2784bfff6873SLukas Czerner sb = elr->lr_super; 2785bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2786bfff6873SLukas Czerner 2787bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2788bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2789bfff6873SLukas Czerner if (!gdp) { 2790bfff6873SLukas Czerner ret = 1; 2791bfff6873SLukas Czerner break; 2792bfff6873SLukas Czerner } 2793bfff6873SLukas Czerner 2794bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2795bfff6873SLukas Czerner break; 2796bfff6873SLukas Czerner } 2797bfff6873SLukas Czerner 27987f511862STheodore Ts'o if (group >= ngroups) 2799bfff6873SLukas Czerner ret = 1; 2800bfff6873SLukas Czerner 2801bfff6873SLukas Czerner if (!ret) { 2802bfff6873SLukas Czerner timeout = jiffies; 2803bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2804bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2805bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 280651ce6511SLukas Czerner timeout = (jiffies - timeout) * 280751ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2808bfff6873SLukas Czerner elr->lr_timeout = timeout; 2809bfff6873SLukas Czerner } 2810bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2811bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2812bfff6873SLukas Czerner } 2813bfff6873SLukas Czerner return ret; 2814bfff6873SLukas Czerner } 2815bfff6873SLukas Czerner 2816bfff6873SLukas Czerner /* 2817bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28184ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2819bfff6873SLukas Czerner */ 2820bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2821bfff6873SLukas Czerner { 2822bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2823bfff6873SLukas Czerner 2824bfff6873SLukas Czerner if (!elr) 2825bfff6873SLukas Czerner return; 2826bfff6873SLukas Czerner 2827bfff6873SLukas Czerner sbi = elr->lr_sbi; 2828bfff6873SLukas Czerner 2829bfff6873SLukas Czerner list_del(&elr->lr_request); 2830bfff6873SLukas Czerner sbi->s_li_request = NULL; 2831bfff6873SLukas Czerner kfree(elr); 2832bfff6873SLukas Czerner } 2833bfff6873SLukas Czerner 2834bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2835bfff6873SLukas Czerner { 28361bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 28371bb933fbSLukas Czerner if (!ext4_li_info) { 28381bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2839bfff6873SLukas Czerner return; 28401bb933fbSLukas Czerner } 2841bfff6873SLukas Czerner 2842bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28431bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2844bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28451bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2846bfff6873SLukas Czerner } 2847bfff6873SLukas Czerner 28488f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28498f1f7453SEric Sandeen 2850bfff6873SLukas Czerner /* 2851bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2852bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2853bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2854bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2855bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2856bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2857bfff6873SLukas Czerner * next waking time and put itself into sleep. 2858bfff6873SLukas Czerner */ 2859bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2860bfff6873SLukas Czerner { 2861bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2862bfff6873SLukas Czerner struct list_head *pos, *n; 2863bfff6873SLukas Czerner struct ext4_li_request *elr; 28644ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2865bfff6873SLukas Czerner 2866bfff6873SLukas Czerner BUG_ON(NULL == eli); 2867bfff6873SLukas Czerner 2868bfff6873SLukas Czerner cont_thread: 2869bfff6873SLukas Czerner while (true) { 2870bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2871bfff6873SLukas Czerner 2872bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2873bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2874bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2875bfff6873SLukas Czerner goto exit_thread; 2876bfff6873SLukas Czerner } 2877bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2878e22834f0SDmitry Monakhov int err = 0; 2879e22834f0SDmitry Monakhov int progress = 0; 2880bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2881bfff6873SLukas Czerner lr_request); 2882bfff6873SLukas Czerner 2883e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 2884e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 2885e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 2886e22834f0SDmitry Monakhov continue; 2887e22834f0SDmitry Monakhov } 2888e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 2889e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 2890e22834f0SDmitry Monakhov progress = 1; 2891e22834f0SDmitry Monakhov /* 2892e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 2893e22834f0SDmitry Monakhov * be removed from the list, it is 2894e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 2895e22834f0SDmitry Monakhov */ 2896e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 2897e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 2898e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 2899e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 2900e22834f0SDmitry Monakhov n = pos->next; 2901e22834f0SDmitry Monakhov } 2902e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 2903e22834f0SDmitry Monakhov } 2904b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2905e22834f0SDmitry Monakhov if (err) { 2906bfff6873SLukas Czerner ext4_remove_li_request(elr); 2907bfff6873SLukas Czerner continue; 2908bfff6873SLukas Czerner } 2909e22834f0SDmitry Monakhov if (!progress) { 2910e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 2911e22834f0SDmitry Monakhov (prandom_u32() 2912e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 2913b2c78cd0STheodore Ts'o } 2914bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2915bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2916bfff6873SLukas Czerner } 2917bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2918bfff6873SLukas Czerner 2919a0acae0eSTejun Heo try_to_freeze(); 2920bfff6873SLukas Czerner 29214ed5c033SLukas Czerner cur = jiffies; 29224ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2923f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2924bfff6873SLukas Czerner cond_resched(); 2925bfff6873SLukas Czerner continue; 2926bfff6873SLukas Czerner } 2927bfff6873SLukas Czerner 29284ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29294ed5c033SLukas Czerner 29308f1f7453SEric Sandeen if (kthread_should_stop()) { 29318f1f7453SEric Sandeen ext4_clear_request_list(); 29328f1f7453SEric Sandeen goto exit_thread; 29338f1f7453SEric Sandeen } 2934bfff6873SLukas Czerner } 2935bfff6873SLukas Czerner 2936bfff6873SLukas Czerner exit_thread: 2937bfff6873SLukas Czerner /* 2938bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2939bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2940bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2941bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2942bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2943bfff6873SLukas Czerner * new one. 2944bfff6873SLukas Czerner */ 2945bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2946bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2947bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2948bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2949bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2950bfff6873SLukas Czerner goto cont_thread; 2951bfff6873SLukas Czerner } 2952bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2953bfff6873SLukas Czerner kfree(ext4_li_info); 2954bfff6873SLukas Czerner ext4_li_info = NULL; 2955bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner return 0; 2958bfff6873SLukas Czerner } 2959bfff6873SLukas Czerner 2960bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2961bfff6873SLukas Czerner { 2962bfff6873SLukas Czerner struct list_head *pos, *n; 2963bfff6873SLukas Czerner struct ext4_li_request *elr; 2964bfff6873SLukas Czerner 2965bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2966bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2967bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2968bfff6873SLukas Czerner lr_request); 2969bfff6873SLukas Czerner ext4_remove_li_request(elr); 2970bfff6873SLukas Czerner } 2971bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2972bfff6873SLukas Czerner } 2973bfff6873SLukas Czerner 2974bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2975bfff6873SLukas Czerner { 29768f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29778f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29788f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 29798f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2980bfff6873SLukas Czerner ext4_clear_request_list(); 2981bfff6873SLukas Czerner kfree(ext4_li_info); 2982bfff6873SLukas Czerner ext4_li_info = NULL; 298392b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 2984bfff6873SLukas Czerner "initialization thread\n", 2985bfff6873SLukas Czerner err); 2986bfff6873SLukas Czerner return err; 2987bfff6873SLukas Czerner } 2988bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2989bfff6873SLukas Czerner return 0; 2990bfff6873SLukas Czerner } 2991bfff6873SLukas Czerner 2992bfff6873SLukas Czerner /* 2993bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2994bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2995bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2996bfff6873SLukas Czerner * groups and return total number of groups. 2997bfff6873SLukas Czerner */ 2998bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2999bfff6873SLukas Czerner { 3000bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3001bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3002bfff6873SLukas Czerner 3003bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3004bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3005bfff6873SLukas Czerner if (!gdp) 3006bfff6873SLukas Czerner continue; 3007bfff6873SLukas Czerner 3008bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3009bfff6873SLukas Czerner break; 3010bfff6873SLukas Czerner } 3011bfff6873SLukas Czerner 3012bfff6873SLukas Czerner return group; 3013bfff6873SLukas Czerner } 3014bfff6873SLukas Czerner 3015bfff6873SLukas Czerner static int ext4_li_info_new(void) 3016bfff6873SLukas Czerner { 3017bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3018bfff6873SLukas Czerner 3019bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3020bfff6873SLukas Czerner if (!eli) 3021bfff6873SLukas Czerner return -ENOMEM; 3022bfff6873SLukas Czerner 3023bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3024bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3025bfff6873SLukas Czerner 3026bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3027bfff6873SLukas Czerner 3028bfff6873SLukas Czerner ext4_li_info = eli; 3029bfff6873SLukas Czerner 3030bfff6873SLukas Czerner return 0; 3031bfff6873SLukas Czerner } 3032bfff6873SLukas Czerner 3033bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3034bfff6873SLukas Czerner ext4_group_t start) 3035bfff6873SLukas Czerner { 3036bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3037bfff6873SLukas Czerner struct ext4_li_request *elr; 3038bfff6873SLukas Czerner 3039bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3040bfff6873SLukas Czerner if (!elr) 3041bfff6873SLukas Czerner return NULL; 3042bfff6873SLukas Czerner 3043bfff6873SLukas Czerner elr->lr_super = sb; 3044bfff6873SLukas Czerner elr->lr_sbi = sbi; 3045bfff6873SLukas Czerner elr->lr_next_group = start; 3046bfff6873SLukas Czerner 3047bfff6873SLukas Czerner /* 3048bfff6873SLukas Czerner * Randomize first schedule time of the request to 3049bfff6873SLukas Czerner * spread the inode table initialization requests 3050bfff6873SLukas Czerner * better. 3051bfff6873SLukas Czerner */ 3052dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3053dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3054bfff6873SLukas Czerner return elr; 3055bfff6873SLukas Czerner } 3056bfff6873SLukas Czerner 30577f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3058bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3059bfff6873SLukas Czerner { 3060bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 30617f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3062bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30636c5a6cb9SAndrew Morton int ret = 0; 3064bfff6873SLukas Czerner 30657f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 306651ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 306751ce6511SLukas Czerner /* 306851ce6511SLukas Czerner * Reset timeout so it can be computed again, because 306951ce6511SLukas Czerner * s_li_wait_mult might have changed. 307051ce6511SLukas Czerner */ 307151ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 30727f511862STheodore Ts'o goto out; 307351ce6511SLukas Czerner } 3074bfff6873SLukas Czerner 3075bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3076bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 307755ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 30787f511862STheodore Ts'o goto out; 3079bfff6873SLukas Czerner 3080bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 30817f511862STheodore Ts'o if (!elr) { 30827f511862STheodore Ts'o ret = -ENOMEM; 30837f511862STheodore Ts'o goto out; 30847f511862STheodore Ts'o } 3085bfff6873SLukas Czerner 3086bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3087bfff6873SLukas Czerner ret = ext4_li_info_new(); 3088bfff6873SLukas Czerner if (ret) 3089bfff6873SLukas Czerner goto out; 3090bfff6873SLukas Czerner } 3091bfff6873SLukas Czerner 3092bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3093bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3094bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3095bfff6873SLukas Czerner 3096bfff6873SLukas Czerner sbi->s_li_request = elr; 309746e4690bSTao Ma /* 309846e4690bSTao Ma * set elr to NULL here since it has been inserted to 309946e4690bSTao Ma * the request_list and the removal and free of it is 310046e4690bSTao Ma * handled by ext4_clear_request_list from now on. 310146e4690bSTao Ma */ 310246e4690bSTao Ma elr = NULL; 3103bfff6873SLukas Czerner 3104bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3105bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3106bfff6873SLukas Czerner if (ret) 3107bfff6873SLukas Czerner goto out; 3108bfff6873SLukas Czerner } 3109bfff6873SLukas Czerner out: 3110bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3111beed5ecbSNicolas Kaiser if (ret) 3112bfff6873SLukas Czerner kfree(elr); 3113bfff6873SLukas Czerner return ret; 3114bfff6873SLukas Czerner } 3115bfff6873SLukas Czerner 3116bfff6873SLukas Czerner /* 3117bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3118bfff6873SLukas Czerner * module unload. 3119bfff6873SLukas Czerner */ 3120bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3121bfff6873SLukas Czerner { 3122bfff6873SLukas Czerner /* 3123bfff6873SLukas Czerner * If thread exited earlier 3124bfff6873SLukas Czerner * there's nothing to be done. 3125bfff6873SLukas Czerner */ 31268f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3127bfff6873SLukas Czerner return; 3128bfff6873SLukas Czerner 31298f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3130bfff6873SLukas Czerner } 3131bfff6873SLukas Czerner 313225ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 313325ed6e8aSDarrick J. Wong { 313425ed6e8aSDarrick J. Wong int ret = 1; 313525ed6e8aSDarrick J. Wong int compat, incompat; 313625ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 313725ed6e8aSDarrick J. Wong 31389aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3139db9ee220SDarrick J. Wong /* journal checksum v3 */ 314025ed6e8aSDarrick J. Wong compat = 0; 3141db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 314225ed6e8aSDarrick J. Wong } else { 314325ed6e8aSDarrick J. Wong /* journal checksum v1 */ 314425ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 314525ed6e8aSDarrick J. Wong incompat = 0; 314625ed6e8aSDarrick J. Wong } 314725ed6e8aSDarrick J. Wong 3148feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3149feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3150feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3151feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 315225ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 315325ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 315425ed6e8aSDarrick J. Wong compat, 0, 315525ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 315625ed6e8aSDarrick J. Wong incompat); 315725ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 315825ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 315925ed6e8aSDarrick J. Wong compat, 0, 316025ed6e8aSDarrick J. Wong incompat); 316125ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 316225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 316325ed6e8aSDarrick J. Wong } else { 3164feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3165feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 316625ed6e8aSDarrick J. Wong } 316725ed6e8aSDarrick J. Wong 316825ed6e8aSDarrick J. Wong return ret; 316925ed6e8aSDarrick J. Wong } 317025ed6e8aSDarrick J. Wong 3171952fc18eSTheodore Ts'o /* 3172952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3173952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3174952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3175952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3176952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3177952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3178952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3179952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3180952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3181952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3182952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3183952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3184952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3185952fc18eSTheodore Ts'o */ 3186952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3187952fc18eSTheodore Ts'o char *buf) 3188952fc18eSTheodore Ts'o { 3189952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3190952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3191952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3192952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3193952fc18eSTheodore Ts'o int s, j, count = 0; 3194952fc18eSTheodore Ts'o 3195e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 31960548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 31970548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 31980548bbb8STheodore Ts'o 3199952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3200952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3201952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3202952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3203952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3204952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3205952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3206952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3207952fc18eSTheodore Ts'o count++; 3208952fc18eSTheodore Ts'o } 3209952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3210952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3211952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3212952fc18eSTheodore Ts'o count++; 3213952fc18eSTheodore Ts'o } 3214952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3215952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3216952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3217952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3218952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3219952fc18eSTheodore Ts'o count++; 3220952fc18eSTheodore Ts'o } 3221952fc18eSTheodore Ts'o if (i != grp) 3222952fc18eSTheodore Ts'o continue; 3223952fc18eSTheodore Ts'o s = 0; 3224952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3225952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3226952fc18eSTheodore Ts'o count++; 3227952fc18eSTheodore Ts'o } 3228c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3229c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3230c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3231c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3232c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3233952fc18eSTheodore Ts'o } 3234c48ae41bSTheodore Ts'o count += j; 3235c48ae41bSTheodore Ts'o for (; j > 0; j--) 3236c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3237952fc18eSTheodore Ts'o } 3238952fc18eSTheodore Ts'o if (!count) 3239952fc18eSTheodore Ts'o return 0; 3240952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3241952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3242952fc18eSTheodore Ts'o } 3243952fc18eSTheodore Ts'o 3244952fc18eSTheodore Ts'o /* 3245952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3246952fc18eSTheodore Ts'o */ 3247952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3248952fc18eSTheodore Ts'o { 3249952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3250952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 32513c816dedSEric Whitney struct inode *j_inode; 32523c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3253952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3254952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 32554fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3256952fc18eSTheodore Ts'o 3257952fc18eSTheodore Ts'o if (!buf) 3258952fc18eSTheodore Ts'o return -ENOMEM; 3259952fc18eSTheodore Ts'o 3260952fc18eSTheodore Ts'o /* 3261952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3262952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3263952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3264952fc18eSTheodore Ts'o */ 3265952fc18eSTheodore Ts'o 3266952fc18eSTheodore Ts'o /* 3267952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3268952fc18eSTheodore Ts'o */ 3269952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3270952fc18eSTheodore Ts'o 3271952fc18eSTheodore Ts'o /* 3272952fc18eSTheodore Ts'o * Add the overhead found in each block group 3273952fc18eSTheodore Ts'o */ 3274952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3275952fc18eSTheodore Ts'o int blks; 3276952fc18eSTheodore Ts'o 3277952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3278952fc18eSTheodore Ts'o overhead += blks; 3279952fc18eSTheodore Ts'o if (blks) 3280952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3281952fc18eSTheodore Ts'o cond_resched(); 3282952fc18eSTheodore Ts'o } 32833c816dedSEric Whitney 32843c816dedSEric Whitney /* 32853c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 32863c816dedSEric Whitney * loaded or not 32873c816dedSEric Whitney */ 3288b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3289810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 32903c816dedSEric Whitney else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { 32913c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 32923c816dedSEric Whitney if (j_inode) { 32933c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 32943c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 32953c816dedSEric Whitney iput(j_inode); 32963c816dedSEric Whitney } else { 32973c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 32983c816dedSEric Whitney } 32993c816dedSEric Whitney } 3300952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3301952fc18eSTheodore Ts'o smp_wmb(); 3302952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3303952fc18eSTheodore Ts'o return 0; 3304952fc18eSTheodore Ts'o } 3305952fc18eSTheodore Ts'o 3306b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 330727dd4385SLukas Czerner { 330827dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3309b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 331027dd4385SLukas Czerner 331127dd4385SLukas Czerner /* 331230fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 331330fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 331430fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 331530fac0f7SJan Kara * to keep ext2/3 backward compatibility. 331630fac0f7SJan Kara */ 3317e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3318b5799018STheodore Ts'o return; 331930fac0f7SJan Kara /* 332027dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 332127dd4385SLukas Czerner * This should cover the situations where we can not afford to run 332227dd4385SLukas Czerner * out of space like for example punch hole, or converting 3323556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 332427dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 332527dd4385SLukas Czerner * very rare. 332627dd4385SLukas Czerner */ 3327b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3328b5799018STheodore Ts'o sbi->s_cluster_bits); 332927dd4385SLukas Czerner 333027dd4385SLukas Czerner do_div(resv_clusters, 50); 333127dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 333227dd4385SLukas Czerner 3333b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 333427dd4385SLukas Czerner } 333527dd4385SLukas Czerner 3336617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3337ac27a0ecSDave Kleikamp { 3338d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3339ac27a0ecSDave Kleikamp struct buffer_head *bh; 3340617ba13bSMingming Cao struct ext4_super_block *es = NULL; 33415aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3342617ba13bSMingming Cao ext4_fsblk_t block; 3343617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 334470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3345ac27a0ecSDave Kleikamp unsigned long offset = 0; 3346ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3347ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3348ac27a0ecSDave Kleikamp struct inode *root; 33490390131bSFrank Mayhar const char *descr; 3350dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3351281b5995STheodore Ts'o int blocksize, clustersize; 33524ec11028STheodore Ts'o unsigned int db_count; 33534ec11028STheodore Ts'o unsigned int i; 3354281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3355bd81d8eeSLaurent Vivier __u64 blocks_count; 335607aa2ea1SLukas Czerner int err = 0; 3357b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3358bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3359ac27a0ecSDave Kleikamp 33605aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 33615aee0f8aSTheodore Ts'o goto out_free_base; 3362705895b6SPekka Enberg 3363705895b6SPekka Enberg sbi->s_blockgroup_lock = 3364705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 33655aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 33665aee0f8aSTheodore Ts'o goto out_free_base; 33675aee0f8aSTheodore Ts'o 3368ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 33692c0544b2STheodore Ts'o sbi->s_sb = sb; 3370240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3371d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3372f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3373f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3374f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3375ac27a0ecSDave Kleikamp 33769f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3377ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 33789f6200bbSTheodore Ts'o 337907aa2ea1SLukas Czerner /* -EINVAL is default */ 3380dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3381617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3382ac27a0ecSDave Kleikamp if (!blocksize) { 3383b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3384ac27a0ecSDave Kleikamp goto out_fail; 3385ac27a0ecSDave Kleikamp } 3386ac27a0ecSDave Kleikamp 3387ac27a0ecSDave Kleikamp /* 3388617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3389ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3390ac27a0ecSDave Kleikamp */ 3391617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 339270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 339370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3394ac27a0ecSDave Kleikamp } else { 339570bbb3e0SAndrew Morton logical_sb_block = sb_block; 3396ac27a0ecSDave Kleikamp } 3397ac27a0ecSDave Kleikamp 3398a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3399b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3400ac27a0ecSDave Kleikamp goto out_fail; 3401ac27a0ecSDave Kleikamp } 3402ac27a0ecSDave Kleikamp /* 3403ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3404617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3405ac27a0ecSDave Kleikamp */ 34062716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3407ac27a0ecSDave Kleikamp sbi->s_es = es; 3408ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3409617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3410617ba13bSMingming Cao goto cantfind_ext4; 3411afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3412ac27a0ecSDave Kleikamp 3413feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3414e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3415e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3416363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3417feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3418feb0ab32SDarrick J. Wong 3419d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3420d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3421d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3422d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3423d25425f8SDarrick J. Wong silent = 1; 3424d25425f8SDarrick J. Wong goto cantfind_ext4; 3425d25425f8SDarrick J. Wong } 3426d25425f8SDarrick J. Wong 34270441984aSDarrick J. Wong /* Load the checksum driver */ 3428e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb)) { 34290441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 34300441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 34310441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 34320441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 34330441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 34340441984aSDarrick J. Wong goto failed_mount; 34350441984aSDarrick J. Wong } 34360441984aSDarrick J. Wong } 34370441984aSDarrick J. Wong 3438a9c47317SDarrick J. Wong /* Check superblock checksum */ 3439a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3440a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3441a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3442a9c47317SDarrick J. Wong silent = 1; 34436a797d27SDarrick J. Wong ret = -EFSBADCRC; 3444a9c47317SDarrick J. Wong goto cantfind_ext4; 3445a9c47317SDarrick J. Wong } 3446a9c47317SDarrick J. Wong 3447a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3448e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 34498c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 34508c81bd8fSDarrick J. Wong else if (ext4_has_metadata_csum(sb)) 3451a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3452a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3453a9c47317SDarrick J. Wong 3454ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3455ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3456fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3457617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3458fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 345987f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3460fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3461617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3462fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3463ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3464fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 346503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3466fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 34672e7842b8SHugh Dickins #endif 346898c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 346998c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 347098c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 347198c1a759SDarrick J. Wong 3472617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3473fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3474617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3475fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3476617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3477fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3478ac27a0ecSDave Kleikamp 3479617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3480fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3481bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3482fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3483bb4f397aSAneesh Kumar K.V else 3484fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 348545f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3486fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 34878b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3488fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3489ac27a0ecSDave Kleikamp 349008cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 349108cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 349230773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 349330773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 349430773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3495ac27a0ecSDave Kleikamp 34968b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3497fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3498ac27a0ecSDave Kleikamp 34991e2462f9SMingming Cao /* 3500dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3501dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3502dd919b98SAneesh Kumar K.V */ 3503bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35048b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3505fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3506dd919b98SAneesh Kumar K.V 350751ce6511SLukas Czerner /* 350851ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 350951ce6511SLukas Czerner * no mount option specified. 351051ce6511SLukas Czerner */ 351151ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 351251ce6511SLukas Czerner 35135aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 35145aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 35155aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 35165aee0f8aSTheodore Ts'o GFP_KERNEL); 35175aee0f8aSTheodore Ts'o if (!s_mount_opts) 35185aee0f8aSTheodore Ts'o goto failed_mount; 35195aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 35205aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 35218b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35228b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35235aee0f8aSTheodore Ts'o s_mount_opts); 35245aee0f8aSTheodore Ts'o } 35255aee0f8aSTheodore Ts'o kfree(s_mount_opts); 35268b67f04aSTheodore Ts'o } 35275a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3528b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3529661aa520SEric Sandeen &journal_ioprio, 0)) 3530ac27a0ecSDave Kleikamp goto failed_mount; 3531ac27a0ecSDave Kleikamp 353256889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 353356889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 353456889787STheodore Ts'o "with data=journal disables delayed " 353556889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 353656889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 353756889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 353856889787STheodore Ts'o "both data=journal and delalloc"); 353956889787STheodore Ts'o goto failed_mount; 354056889787STheodore Ts'o } 354156889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 354256889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 35436ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 354456889787STheodore Ts'o goto failed_mount; 354556889787STheodore Ts'o } 3546923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3547923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3548923ae0ffSRoss Zwisler "both data=journal and dax"); 3549923ae0ffSRoss Zwisler goto failed_mount; 3550923ae0ffSRoss Zwisler } 355173b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 355273b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 355373b92a2aSSergey Karamov "encrypted files will use data=ordered " 355473b92a2aSSergey Karamov "instead of data journaling mode"); 355573b92a2aSSergey Karamov } 355656889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 355756889787STheodore Ts'o clear_opt(sb, DELALLOC); 3558001e4a87STejun Heo } else { 3559001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 356056889787STheodore Ts'o } 356156889787STheodore Ts'o 3562ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3563482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3564ac27a0ecSDave Kleikamp 3565617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3566e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3567e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3568e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3569b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3570b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3571b31e1552SEric Sandeen "running e2fsck is recommended"); 3572469108ffSTheodore Tso 3573ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3574ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3575e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3576ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3577ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3578ed3654ebSTheodore Ts'o goto failed_mount; 3579ed3654ebSTheodore Ts'o } 3580ed3654ebSTheodore Ts'o } 3581ed3654ebSTheodore Ts'o 35822035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 35832035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 35842035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 35852035e776STheodore Ts'o "using the ext4 subsystem"); 35862035e776STheodore Ts'o else { 35872035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 35882035e776STheodore Ts'o "to feature incompatibilities"); 35892035e776STheodore Ts'o goto failed_mount; 35902035e776STheodore Ts'o } 35912035e776STheodore Ts'o } 35922035e776STheodore Ts'o 35932035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 35942035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 35952035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 35962035e776STheodore Ts'o "using the ext4 subsystem"); 35972035e776STheodore Ts'o else { 35982035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 35992035e776STheodore Ts'o "to feature incompatibilities"); 36002035e776STheodore Ts'o goto failed_mount; 36012035e776STheodore Ts'o } 36022035e776STheodore Ts'o } 36032035e776STheodore Ts'o 3604469108ffSTheodore Tso /* 3605ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3606ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3607ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3608ac27a0ecSDave Kleikamp */ 3609a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3610ac27a0ecSDave Kleikamp goto failed_mount; 3611a13fb1a4SEric Sandeen 3612261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3613617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3614617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3615b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 36168cdf3372STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 36178cdf3372STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 36188cdf3372STheodore Ts'o goto failed_mount; 36198cdf3372STheodore Ts'o } 36208cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 36218cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 36228cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 36238cdf3372STheodore Ts'o "Invalid log block size: %u", 36248cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 3625ac27a0ecSDave Kleikamp goto failed_mount; 3626ac27a0ecSDave Kleikamp } 3627ac27a0ecSDave Kleikamp 36285b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 36295b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 36305b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 36315b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 36325b9554dcSTheodore Ts'o goto failed_mount; 36335b9554dcSTheodore Ts'o } 36345b9554dcSTheodore Ts'o 3635923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 363687eefeb4SToshi Kani err = bdev_dax_supported(sb, blocksize); 363787eefeb4SToshi Kani if (err) 3638923ae0ffSRoss Zwisler goto failed_mount; 3639923ae0ffSRoss Zwisler } 3640923ae0ffSRoss Zwisler 3641e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 36426ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 36436ddb2447STheodore Ts'o es->s_encryption_level); 36446ddb2447STheodore Ts'o goto failed_mount; 36456ddb2447STheodore Ts'o } 36466ddb2447STheodore Ts'o 3647ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3648ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3649ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3650b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3651ce40733cSAneesh Kumar K.V blocksize); 3652ac27a0ecSDave Kleikamp goto failed_mount; 3653ac27a0ecSDave Kleikamp } 3654ac27a0ecSDave Kleikamp 3655ac27a0ecSDave Kleikamp brelse(bh); 365670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 365770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3658a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3659ac27a0ecSDave Kleikamp if (!bh) { 3660b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3661b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3662ac27a0ecSDave Kleikamp goto failed_mount; 3663ac27a0ecSDave Kleikamp } 36642716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3665ac27a0ecSDave Kleikamp sbi->s_es = es; 3666617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3667b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3668b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3669ac27a0ecSDave Kleikamp goto failed_mount; 3670ac27a0ecSDave Kleikamp } 3671ac27a0ecSDave Kleikamp } 3672ac27a0ecSDave Kleikamp 3673e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3674f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3675f287a1a5STheodore Ts'o has_huge_files); 3676f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3677ac27a0ecSDave Kleikamp 3678617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3679617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3680617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3681ac27a0ecSDave Kleikamp } else { 3682ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3683ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3684617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 36851330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3686ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3688b31e1552SEric Sandeen "unsupported inode size: %d", 3689ac27a0ecSDave Kleikamp sbi->s_inode_size); 3690ac27a0ecSDave Kleikamp goto failed_mount; 3691ac27a0ecSDave Kleikamp } 3692ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3693ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3694ac27a0ecSDave Kleikamp } 36950b8e58a1SAndreas Dilger 36960d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3697e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 36988fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 36990d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3700d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3702b31e1552SEric Sandeen "unsupported descriptor size %lu", 37030d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37040d1ee42fSAlexandre Ratchov goto failed_mount; 37050d1ee42fSAlexandre Ratchov } 37060d1ee42fSAlexandre Ratchov } else 37070d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37080b8e58a1SAndreas Dilger 3709ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3710ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 37110b8e58a1SAndreas Dilger 3712617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3713ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3714617ba13bSMingming Cao goto cantfind_ext4; 3715cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 3716cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 3717cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 3718cd6bb35bSTheodore Ts'o sbi->s_blocks_per_group); 3719cd6bb35bSTheodore Ts'o goto failed_mount; 3720cd6bb35bSTheodore Ts'o } 3721ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3722ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37230d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3724ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3725ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3726e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3727e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37280b8e58a1SAndreas Dilger 3729ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3730ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3731ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3732e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3733f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3734f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3735f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3736f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3737f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 373823301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 373923301410STheodore Ts'o es->s_flags |= 374023301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3741f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3742f99b2589STheodore Ts'o #else 374323301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 374423301410STheodore Ts'o es->s_flags |= 374523301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3746f99b2589STheodore Ts'o #endif 3747f99b2589STheodore Ts'o } 374823301410STheodore Ts'o } 3749ac27a0ecSDave Kleikamp 3750281b5995STheodore Ts'o /* Handle clustersize */ 3751281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3752e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3753281b5995STheodore Ts'o if (has_bigalloc) { 3754281b5995STheodore Ts'o if (clustersize < blocksize) { 3755281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3756281b5995STheodore Ts'o "cluster size (%d) smaller than " 3757281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3758281b5995STheodore Ts'o goto failed_mount; 3759281b5995STheodore Ts'o } 37608cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 37618cdf3372STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 37628cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 37638cdf3372STheodore Ts'o "Invalid log cluster size: %u", 37648cdf3372STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 37658cdf3372STheodore Ts'o goto failed_mount; 37668cdf3372STheodore Ts'o } 3767281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3768281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3769281b5995STheodore Ts'o sbi->s_clusters_per_group = 3770281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3771281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3772281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3773281b5995STheodore Ts'o "#clusters per group too big: %lu", 3774281b5995STheodore Ts'o sbi->s_clusters_per_group); 3775281b5995STheodore Ts'o goto failed_mount; 3776281b5995STheodore Ts'o } 3777281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3778281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3779281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3780281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3781281b5995STheodore Ts'o sbi->s_blocks_per_group, 3782281b5995STheodore Ts'o sbi->s_clusters_per_group); 3783281b5995STheodore Ts'o goto failed_mount; 3784281b5995STheodore Ts'o } 3785281b5995STheodore Ts'o } else { 3786281b5995STheodore Ts'o if (clustersize != blocksize) { 3787281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3788281b5995STheodore Ts'o "block size (%d)", clustersize, 3789281b5995STheodore Ts'o blocksize); 3790281b5995STheodore Ts'o clustersize = blocksize; 3791281b5995STheodore Ts'o } 3792ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3793b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3794b31e1552SEric Sandeen "#blocks per group too big: %lu", 3795ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3796ac27a0ecSDave Kleikamp goto failed_mount; 3797ac27a0ecSDave Kleikamp } 3798281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3799281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3800281b5995STheodore Ts'o } 3801281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3802281b5995STheodore Ts'o 3803960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3804960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3805960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3806960fd856STheodore Ts'o 3807bf43d84bSEric Sandeen /* 3808bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3809bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3810bf43d84bSEric Sandeen */ 38115a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 381230ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38135a9ae68aSDarrick J. Wong if (err) { 3814b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3815bf43d84bSEric Sandeen " too large to mount safely on this system"); 3816ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 381790c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3818ac27a0ecSDave Kleikamp goto failed_mount; 3819ac27a0ecSDave Kleikamp } 3820ac27a0ecSDave Kleikamp 3821617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3822617ba13bSMingming Cao goto cantfind_ext4; 3823e7c95593SEric Sandeen 38240f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38250f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38260f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3827b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3828b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38290f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38300f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38310f2ddca6SFrom: Thiemo Nagel } 38320f2ddca6SFrom: Thiemo Nagel 38334ec11028STheodore Ts'o /* 38344ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38354ec11028STheodore Ts'o * of the filesystem. 38364ec11028STheodore Ts'o */ 38374ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3838b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3839b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3840e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38414ec11028STheodore Ts'o ext4_blocks_count(es)); 3842e7c95593SEric Sandeen goto failed_mount; 3843e7c95593SEric Sandeen } 3844bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3845bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3846bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3847bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38484ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3849b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38504ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3851b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38524ec11028STheodore Ts'o ext4_blocks_count(es), 38534ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38544ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38554ec11028STheodore Ts'o goto failed_mount; 38564ec11028STheodore Ts'o } 3857bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3858fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3859fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3860617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3861617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 38623a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 38633a4b77cdSEryu Guan if (le32_to_cpu(es->s_first_meta_bg) >= db_count) { 38643a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 38653a4b77cdSEryu Guan "first meta block group too large: %u " 38663a4b77cdSEryu Guan "(group descriptor block count %u)", 38673a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 38683a4b77cdSEryu Guan goto failed_mount; 38693a4b77cdSEryu Guan } 38703a4b77cdSEryu Guan } 3871f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3872f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3873ac27a0ecSDave Kleikamp GFP_KERNEL); 3874ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3875b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38762cde417dSTheodore Ts'o ret = -ENOMEM; 3877ac27a0ecSDave Kleikamp goto failed_mount; 3878ac27a0ecSDave Kleikamp } 3879ac27a0ecSDave Kleikamp 3880705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3881ac27a0ecSDave Kleikamp 3882ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 388370bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3884a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3885ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3886b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3887b31e1552SEric Sandeen "can't read group descriptor %d", i); 3888ac27a0ecSDave Kleikamp db_count = i; 3889ac27a0ecSDave Kleikamp goto failed_mount2; 3890ac27a0ecSDave Kleikamp } 3891ac27a0ecSDave Kleikamp } 3892829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 3893b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 38946a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 3895f9ae9cf5STheodore Ts'o goto failed_mount2; 3896ac27a0ecSDave Kleikamp } 3897772cb7c8SJose R. Santos 3898f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3899ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3900ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3901ac27a0ecSDave Kleikamp 390204ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 390304ecddb7SJan Mrazek (unsigned long) sb); 390404496411STao Ma 3905a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3906eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3907ce7e010aSTheodore Ts'o goto failed_mount3; 3908ce7e010aSTheodore Ts'o 3909c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 391067a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3911c9de560dSAlex Tomas 3912f9ae9cf5STheodore Ts'o /* 3913f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3914f9ae9cf5STheodore Ts'o */ 3915f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3916617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3917617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3918a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 3919ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3920617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3921e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 39221fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3923262b4662SJan Kara else 3924262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3925689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 3926ac27a0ecSDave Kleikamp #endif 3927f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3928f2fa2ffcSAneesh Kumar K.V 3929ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39303b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3931ac27a0ecSDave Kleikamp 3932ac27a0ecSDave Kleikamp sb->s_root = NULL; 3933ac27a0ecSDave Kleikamp 3934ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3935e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 3936ac27a0ecSDave Kleikamp 3937e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) 3938c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 393950460fe8SDarrick J. Wong goto failed_mount3a; 3940c5e06d10SJohann Lombardi 3941ac27a0ecSDave Kleikamp /* 3942ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3943ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3944ac27a0ecSDave Kleikamp */ 3945e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 39464753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 39474753d8a2STheodore Ts'o if (err) 394850460fe8SDarrick J. Wong goto failed_mount3a; 39490390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 3950e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 3951b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3952b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3953744692dcSJiaying Zhang goto failed_mount_wq; 3954ac27a0ecSDave Kleikamp } else { 39551e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 39561e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 39571e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 39581e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 39591e381f60SDmitry Monakhov goto failed_mount_wq; 39601e381f60SDmitry Monakhov } 39611e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 39621e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 39631e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 39641e381f60SDmitry Monakhov goto failed_mount_wq; 39651e381f60SDmitry Monakhov } 39661e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 39671e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 39681e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 39691e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 39701e381f60SDmitry Monakhov goto failed_mount_wq; 39711e381f60SDmitry Monakhov } 39721e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 39731e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 39741e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 39751e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 39761e381f60SDmitry Monakhov goto failed_mount_wq; 39771e381f60SDmitry Monakhov } 39781e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 39791e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 3980fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39810390131bSFrank Mayhar sbi->s_journal = NULL; 39820390131bSFrank Mayhar needs_recovery = 0; 39830390131bSFrank Mayhar goto no_journal; 3984ac27a0ecSDave Kleikamp } 3985ac27a0ecSDave Kleikamp 3986e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 3987eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3988eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3989b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3990744692dcSJiaying Zhang goto failed_mount_wq; 3991eb40a09cSJose R. Santos } 3992eb40a09cSJose R. Santos 399325ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 399425ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 399525ed6e8aSDarrick J. Wong "feature set"); 399625ed6e8aSDarrick J. Wong goto failed_mount_wq; 3997d4da6c9cSLinus Torvalds } 3998818d276cSGirish Shilamkar 3999ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4000ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4001ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4002ac27a0ecSDave Kleikamp case 0: 4003ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 400463f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 400563f57933SAndrew Morton * cope, else JOURNAL_DATA 400663f57933SAndrew Morton */ 4007dab291afSMingming Cao if (jbd2_journal_check_available_features 4008dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4009fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4010ac27a0ecSDave Kleikamp else 4011fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4012ac27a0ecSDave Kleikamp break; 4013ac27a0ecSDave Kleikamp 4014617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4015617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4016dab291afSMingming Cao if (!jbd2_journal_check_available_features 4017dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4018b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4019b31e1552SEric Sandeen "requested data journaling mode"); 4020744692dcSJiaying Zhang goto failed_mount_wq; 4021ac27a0ecSDave Kleikamp } 4022ac27a0ecSDave Kleikamp default: 4023ac27a0ecSDave Kleikamp break; 4024ac27a0ecSDave Kleikamp } 4025ab04df78SJan Kara 4026ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4027ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4028ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4029ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4030ab04df78SJan Kara goto failed_mount_wq; 4031ab04df78SJan Kara } 4032ab04df78SJan Kara 4033b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4034ac27a0ecSDave Kleikamp 403518aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 403618aadd47SBobi Jam 4037ce7e010aSTheodore Ts'o no_journal: 403882939d79SJan Kara sbi->s_mb_cache = ext4_xattr_create_cache(); 40399c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40409c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40419c191f70ST Makphaibulchoke goto failed_mount_wq; 40429c191f70ST Makphaibulchoke } 40439c191f70ST Makphaibulchoke 4044e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 404509cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 40461cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 40471cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 40481cb767cdSTheodore Ts'o goto failed_mount_wq; 40491cb767cdSTheodore Ts'o } 40501cb767cdSTheodore Ts'o 4051e2b911c5SDarrick J. Wong if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && 4052e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4053e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 40546ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 40556ddb2447STheodore Ts'o } 40566ddb2447STheodore Ts'o 4057fd89d5f2STejun Heo /* 4058952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4059952fc18eSTheodore Ts'o * superblock if present. 4060952fc18eSTheodore Ts'o */ 4061952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4062952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4063952fc18eSTheodore Ts'o else { 406407aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 406507aa2ea1SLukas Czerner if (err) 4066952fc18eSTheodore Ts'o goto failed_mount_wq; 4067952fc18eSTheodore Ts'o } 4068952fc18eSTheodore Ts'o 4069952fc18eSTheodore Ts'o /* 4070fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4071fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4072fd89d5f2STejun Heo */ 40732e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40742e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40752e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40762e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 407707aa2ea1SLukas Czerner ret = -ENOMEM; 40782e8fa54eSJan Kara goto failed_mount4; 40792e8fa54eSJan Kara } 40802e8fa54eSJan Kara 4081ac27a0ecSDave Kleikamp /* 4082dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4083ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4084ac27a0ecSDave Kleikamp */ 4085ac27a0ecSDave Kleikamp 40861d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40871d1fe1eeSDavid Howells if (IS_ERR(root)) { 4088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40891d1fe1eeSDavid Howells ret = PTR_ERR(root); 409032a9bb57SManish Katiyar root = NULL; 4091ac27a0ecSDave Kleikamp goto failed_mount4; 4092ac27a0ecSDave Kleikamp } 4093ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4094b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 409594bf608aSAl Viro iput(root); 4096ac27a0ecSDave Kleikamp goto failed_mount4; 4097ac27a0ecSDave Kleikamp } 409848fde701SAl Viro sb->s_root = d_make_root(root); 40991d1fe1eeSDavid Howells if (!sb->s_root) { 4100b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 41011d1fe1eeSDavid Howells ret = -ENOMEM; 41021d1fe1eeSDavid Howells goto failed_mount4; 41031d1fe1eeSDavid Howells } 4104ac27a0ecSDave Kleikamp 41057e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 41067e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4107ef7f3835SKalpak Shah 4108ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4109670e9875STheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && 4110670e9875STheodore Ts'o sbi->s_want_extra_isize == 0) { 4111ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4112ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4113e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 4114ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4115ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4116ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4117ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4118ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4119ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4120ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4121ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4122ef7f3835SKalpak Shah } 4123ef7f3835SKalpak Shah } 4124ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4125ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4126ef7f3835SKalpak Shah sbi->s_inode_size) { 4127ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4128ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4129b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4130b31e1552SEric Sandeen "available"); 4131ef7f3835SKalpak Shah } 4132ef7f3835SKalpak Shah 4133b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 413427dd4385SLukas Czerner 41356fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41366fd058f7STheodore Ts'o if (err) { 4137b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4138fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4139f9ae9cf5STheodore Ts'o goto failed_mount4a; 4140f9ae9cf5STheodore Ts'o } 4141f9ae9cf5STheodore Ts'o 4142f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4143f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4144f9ae9cf5STheodore Ts'o if (err) { 4145f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4146f9ae9cf5STheodore Ts'o err); 4147dcf2d804STao Ma goto failed_mount5; 4148c2774d84SAneesh Kumar K.V } 4149c2774d84SAneesh Kumar K.V 4150d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4151d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4152d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4153908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4154908c7f19STejun Heo GFP_KERNEL); 4155d5e03cbbSTheodore Ts'o if (!err) { 4156d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4157d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4158908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4159908c7f19STejun Heo GFP_KERNEL); 4160d5e03cbbSTheodore Ts'o } 4161d5e03cbbSTheodore Ts'o if (!err) 4162d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4163908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4164d5e03cbbSTheodore Ts'o if (!err) 4165908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4166908c7f19STejun Heo GFP_KERNEL); 4167c8585c6fSDaeho Jeong if (!err) 4168c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4169c8585c6fSDaeho Jeong 4170d5e03cbbSTheodore Ts'o if (err) { 4171d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4172d5e03cbbSTheodore Ts'o goto failed_mount6; 4173d5e03cbbSTheodore Ts'o } 4174d5e03cbbSTheodore Ts'o 4175e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4176d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4177d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4178d5e03cbbSTheodore Ts'o "unable to initialize " 4179d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4180d5e03cbbSTheodore Ts'o goto failed_mount6; 4181d5e03cbbSTheodore Ts'o } 4182d5e03cbbSTheodore Ts'o 4183bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4184bfff6873SLukas Czerner if (err) 4185dcf2d804STao Ma goto failed_mount6; 4186bfff6873SLukas Czerner 4187b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4188dcf2d804STao Ma if (err) 4189dcf2d804STao Ma goto failed_mount7; 41903197ebdbSTheodore Ts'o 41919b2ff357SJan Kara #ifdef CONFIG_QUOTA 41929b2ff357SJan Kara /* Enable quota usage during mount. */ 4193e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { 41949b2ff357SJan Kara err = ext4_enable_quotas(sb); 41959b2ff357SJan Kara if (err) 41969b2ff357SJan Kara goto failed_mount8; 41979b2ff357SJan Kara } 41989b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41999b2ff357SJan Kara 4200617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4201617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4202617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 42030390131bSFrank Mayhar if (needs_recovery) { 4204b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4205617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 42060390131bSFrank Mayhar } 42070390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 42080390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 42090390131bSFrank Mayhar descr = " journalled data mode"; 42100390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 42110390131bSFrank Mayhar descr = " ordered data mode"; 42120390131bSFrank Mayhar else 42130390131bSFrank Mayhar descr = " writeback data mode"; 42140390131bSFrank Mayhar } else 42150390131bSFrank Mayhar descr = "out journal"; 42160390131bSFrank Mayhar 421779add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 421879add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 421979add3a3SLukas Czerner if (!blk_queue_discard(q)) 422079add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 422179add3a3SLukas Czerner "mounting with \"discard\" option, but " 422279add3a3SLukas Czerner "the device does not support discard"); 422379add3a3SLukas Czerner } 422479add3a3SLukas Czerner 4225e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4226d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 42275aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 42285aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 42295aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 42308b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4231ac27a0ecSDave Kleikamp 423266e61a9eSTheodore Ts'o if (es->s_error_count) 423366e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4234ac27a0ecSDave Kleikamp 4235efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4236efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4237efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4238efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4239efbed4dcSTheodore Ts'o 4240d4c402d9SCurt Wohlgemuth kfree(orig_data); 4241ac27a0ecSDave Kleikamp return 0; 4242ac27a0ecSDave Kleikamp 4243617ba13bSMingming Cao cantfind_ext4: 4244ac27a0ecSDave Kleikamp if (!silent) 4245b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4246ac27a0ecSDave Kleikamp goto failed_mount; 4247ac27a0ecSDave Kleikamp 424872ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 424972ba7450STheodore Ts'o failed_mount8: 4250ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 425172ba7450STheodore Ts'o #endif 4252dcf2d804STao Ma failed_mount7: 4253dcf2d804STao Ma ext4_unregister_li_request(sb); 4254dcf2d804STao Ma failed_mount6: 4255f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4256d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4257b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4258d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4259d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4260d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4261d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 426200764937SAzat Khuzhin failed_mount5: 4263f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4264f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4265f9ae9cf5STheodore Ts'o failed_mount4a: 426694bf608aSAl Viro dput(sb->s_root); 426732a9bb57SManish Katiyar sb->s_root = NULL; 426894bf608aSAl Viro failed_mount4: 4269b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42702e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42712e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42724c0425ffSMingming Cao failed_mount_wq: 427382939d79SJan Kara if (sbi->s_mb_cache) { 427482939d79SJan Kara ext4_xattr_destroy_cache(sbi->s_mb_cache); 427582939d79SJan Kara sbi->s_mb_cache = NULL; 427682939d79SJan Kara } 42770390131bSFrank Mayhar if (sbi->s_journal) { 4278dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 427947b4a50bSJan Kara sbi->s_journal = NULL; 42800390131bSFrank Mayhar } 428150460fe8SDarrick J. Wong failed_mount3a: 4282d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4283eb68d0e2SZheng Liu failed_mount3: 42849105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4285c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4286c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4287ac27a0ecSDave Kleikamp failed_mount2: 4288ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4289ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4290b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4291ac27a0ecSDave Kleikamp failed_mount: 42920441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42930441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4294ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4295a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4296ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4297ac27a0ecSDave Kleikamp #endif 4298617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4299ac27a0ecSDave Kleikamp brelse(bh); 4300ac27a0ecSDave Kleikamp out_fail: 4301ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4302f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 43035aee0f8aSTheodore Ts'o out_free_base: 4304ac27a0ecSDave Kleikamp kfree(sbi); 4305d4c402d9SCurt Wohlgemuth kfree(orig_data); 430607aa2ea1SLukas Czerner return err ? err : ret; 4307ac27a0ecSDave Kleikamp } 4308ac27a0ecSDave Kleikamp 4309ac27a0ecSDave Kleikamp /* 4310ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4311ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4312ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4313ac27a0ecSDave Kleikamp */ 4314617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4315ac27a0ecSDave Kleikamp { 4316617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4317ac27a0ecSDave Kleikamp 4318ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 431930773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 432030773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4321ac27a0ecSDave Kleikamp 4322a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4323ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4324dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4325ac27a0ecSDave Kleikamp else 4326dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 43275bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 43285bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 43295bf5683aSHidehiro Kawai else 43305bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4331a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4332ac27a0ecSDave Kleikamp } 4333ac27a0ecSDave Kleikamp 4334c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4335ac27a0ecSDave Kleikamp unsigned int journal_inum) 4336ac27a0ecSDave Kleikamp { 4337ac27a0ecSDave Kleikamp struct inode *journal_inode; 4338ac27a0ecSDave Kleikamp 4339c6cb7e77SEric Whitney /* 4340c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4341c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4342c6cb7e77SEric Whitney * will try to delete it. 4343c6cb7e77SEric Whitney */ 43441d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43451d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4346b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4347ac27a0ecSDave Kleikamp return NULL; 4348ac27a0ecSDave Kleikamp } 4349ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4350ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4351ac27a0ecSDave Kleikamp iput(journal_inode); 4352b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4353ac27a0ecSDave Kleikamp return NULL; 4354ac27a0ecSDave Kleikamp } 4355ac27a0ecSDave Kleikamp 4356e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4357ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43581d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4359b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4360ac27a0ecSDave Kleikamp iput(journal_inode); 4361ac27a0ecSDave Kleikamp return NULL; 4362ac27a0ecSDave Kleikamp } 4363c6cb7e77SEric Whitney return journal_inode; 4364c6cb7e77SEric Whitney } 4365c6cb7e77SEric Whitney 4366c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4367c6cb7e77SEric Whitney unsigned int journal_inum) 4368c6cb7e77SEric Whitney { 4369c6cb7e77SEric Whitney struct inode *journal_inode; 4370c6cb7e77SEric Whitney journal_t *journal; 4371c6cb7e77SEric Whitney 4372c6cb7e77SEric Whitney BUG_ON(!ext4_has_feature_journal(sb)); 4373c6cb7e77SEric Whitney 4374c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4375c6cb7e77SEric Whitney if (!journal_inode) 4376c6cb7e77SEric Whitney return NULL; 4377ac27a0ecSDave Kleikamp 4378dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4379ac27a0ecSDave Kleikamp if (!journal) { 4380b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4381ac27a0ecSDave Kleikamp iput(journal_inode); 4382ac27a0ecSDave Kleikamp return NULL; 4383ac27a0ecSDave Kleikamp } 4384ac27a0ecSDave Kleikamp journal->j_private = sb; 4385617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4386ac27a0ecSDave Kleikamp return journal; 4387ac27a0ecSDave Kleikamp } 4388ac27a0ecSDave Kleikamp 4389617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4390ac27a0ecSDave Kleikamp dev_t j_dev) 4391ac27a0ecSDave Kleikamp { 4392ac27a0ecSDave Kleikamp struct buffer_head *bh; 4393ac27a0ecSDave Kleikamp journal_t *journal; 4394617ba13bSMingming Cao ext4_fsblk_t start; 4395617ba13bSMingming Cao ext4_fsblk_t len; 4396ac27a0ecSDave Kleikamp int hblock, blocksize; 4397617ba13bSMingming Cao ext4_fsblk_t sb_block; 4398ac27a0ecSDave Kleikamp unsigned long offset; 4399617ba13bSMingming Cao struct ext4_super_block *es; 4400ac27a0ecSDave Kleikamp struct block_device *bdev; 4401ac27a0ecSDave Kleikamp 4402e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 44030390131bSFrank Mayhar 4404b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4405ac27a0ecSDave Kleikamp if (bdev == NULL) 4406ac27a0ecSDave Kleikamp return NULL; 4407ac27a0ecSDave Kleikamp 4408ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4409e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4410ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4411b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4412b31e1552SEric Sandeen "blocksize too small for journal device"); 4413ac27a0ecSDave Kleikamp goto out_bdev; 4414ac27a0ecSDave Kleikamp } 4415ac27a0ecSDave Kleikamp 4416617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4417617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4418ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4419ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4420b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4421b31e1552SEric Sandeen "external journal"); 4422ac27a0ecSDave Kleikamp goto out_bdev; 4423ac27a0ecSDave Kleikamp } 4424ac27a0ecSDave Kleikamp 44252716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4426617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4427ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4428617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4429b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4430b31e1552SEric Sandeen "bad superblock"); 4431ac27a0ecSDave Kleikamp brelse(bh); 4432ac27a0ecSDave Kleikamp goto out_bdev; 4433ac27a0ecSDave Kleikamp } 4434ac27a0ecSDave Kleikamp 4435df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4436df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4437df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4438df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4439df4763beSDarrick J. Wong "corrupt superblock"); 4440df4763beSDarrick J. Wong brelse(bh); 4441df4763beSDarrick J. Wong goto out_bdev; 4442df4763beSDarrick J. Wong } 4443df4763beSDarrick J. Wong 4444617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4445b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4446ac27a0ecSDave Kleikamp brelse(bh); 4447ac27a0ecSDave Kleikamp goto out_bdev; 4448ac27a0ecSDave Kleikamp } 4449ac27a0ecSDave Kleikamp 4450bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4451ac27a0ecSDave Kleikamp start = sb_block + 1; 4452ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4453ac27a0ecSDave Kleikamp 4454dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4455ac27a0ecSDave Kleikamp start, len, blocksize); 4456ac27a0ecSDave Kleikamp if (!journal) { 4457b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4458ac27a0ecSDave Kleikamp goto out_bdev; 4459ac27a0ecSDave Kleikamp } 4460ac27a0ecSDave Kleikamp journal->j_private = sb; 4461dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4462ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4463ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4464b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4465ac27a0ecSDave Kleikamp goto out_journal; 4466ac27a0ecSDave Kleikamp } 4467ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4468b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4469b31e1552SEric Sandeen "user (unsupported) - %d", 4470ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4471ac27a0ecSDave Kleikamp goto out_journal; 4472ac27a0ecSDave Kleikamp } 4473617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4474617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4475ac27a0ecSDave Kleikamp return journal; 44760b8e58a1SAndreas Dilger 4477ac27a0ecSDave Kleikamp out_journal: 4478dab291afSMingming Cao jbd2_journal_destroy(journal); 4479ac27a0ecSDave Kleikamp out_bdev: 4480617ba13bSMingming Cao ext4_blkdev_put(bdev); 4481ac27a0ecSDave Kleikamp return NULL; 4482ac27a0ecSDave Kleikamp } 4483ac27a0ecSDave Kleikamp 4484617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4485617ba13bSMingming Cao struct ext4_super_block *es, 4486ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4487ac27a0ecSDave Kleikamp { 4488ac27a0ecSDave Kleikamp journal_t *journal; 4489ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4490ac27a0ecSDave Kleikamp dev_t journal_dev; 4491ac27a0ecSDave Kleikamp int err = 0; 4492ac27a0ecSDave Kleikamp int really_read_only; 4493ac27a0ecSDave Kleikamp 4494e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 44950390131bSFrank Mayhar 4496ac27a0ecSDave Kleikamp if (journal_devnum && 4497ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4498b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4499b31e1552SEric Sandeen "numbers have changed"); 4500ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4501ac27a0ecSDave Kleikamp } else 4502ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4503ac27a0ecSDave Kleikamp 4504ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4505ac27a0ecSDave Kleikamp 4506ac27a0ecSDave Kleikamp /* 4507ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4508ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4509ac27a0ecSDave Kleikamp * can get read-write access to the device. 4510ac27a0ecSDave Kleikamp */ 4511e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4512ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4513b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4514b31e1552SEric Sandeen "required on readonly filesystem"); 4515ac27a0ecSDave Kleikamp if (really_read_only) { 4516b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4517b31e1552SEric Sandeen "unavailable, cannot proceed"); 4518ac27a0ecSDave Kleikamp return -EROFS; 4519ac27a0ecSDave Kleikamp } 4520b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4521b31e1552SEric Sandeen "be enabled during recovery"); 4522ac27a0ecSDave Kleikamp } 4523ac27a0ecSDave Kleikamp } 4524ac27a0ecSDave Kleikamp 4525ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4526b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4527b31e1552SEric Sandeen "and inode journals!"); 4528ac27a0ecSDave Kleikamp return -EINVAL; 4529ac27a0ecSDave Kleikamp } 4530ac27a0ecSDave Kleikamp 4531ac27a0ecSDave Kleikamp if (journal_inum) { 4532617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4533ac27a0ecSDave Kleikamp return -EINVAL; 4534ac27a0ecSDave Kleikamp } else { 4535617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4536ac27a0ecSDave Kleikamp return -EINVAL; 4537ac27a0ecSDave Kleikamp } 4538ac27a0ecSDave Kleikamp 453990576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4540b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 45414776004fSTheodore Ts'o 4542e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4543dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45441c13d5c0STheodore Ts'o if (!err) { 45451c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45461c13d5c0STheodore Ts'o if (save) 45471c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45481c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4549dab291afSMingming Cao err = jbd2_journal_load(journal); 45501c13d5c0STheodore Ts'o if (save) 45511c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45521c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45531c13d5c0STheodore Ts'o kfree(save); 45541c13d5c0STheodore Ts'o } 4555ac27a0ecSDave Kleikamp 4556ac27a0ecSDave Kleikamp if (err) { 4557b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4558dab291afSMingming Cao jbd2_journal_destroy(journal); 4559ac27a0ecSDave Kleikamp return err; 4560ac27a0ecSDave Kleikamp } 4561ac27a0ecSDave Kleikamp 4562617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4563617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4564ac27a0ecSDave Kleikamp 4565c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4566ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4567ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4568ac27a0ecSDave Kleikamp 4569ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4570e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4571ac27a0ecSDave Kleikamp } 4572ac27a0ecSDave Kleikamp 4573ac27a0ecSDave Kleikamp return 0; 4574ac27a0ecSDave Kleikamp } 4575ac27a0ecSDave Kleikamp 4576e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4577ac27a0ecSDave Kleikamp { 4578e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4579617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4580c4be0c1dSTakashi Sato int error = 0; 4581ac27a0ecSDave Kleikamp 4582bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4583c4be0c1dSTakashi Sato return error; 458471290b36STheodore Ts'o /* 458571290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 458671290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 458771290b36STheodore Ts'o * write time when we are mounting the root file system 458871290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 458971290b36STheodore Ts'o * for people who are east of GMT and who make their clock 459071290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 459171290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 459271290b36STheodore Ts'o * to complain and force a full file system check. 459371290b36STheodore Ts'o */ 459471290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4595ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4596f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4597afc32f7eSTheodore Ts'o es->s_kbytes_written = 4598afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4599afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4600afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4601f613dfcbSTheodore Ts'o else 4602f613dfcbSTheodore Ts'o es->s_kbytes_written = 4603f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4604d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 460557042651STheodore Ts'o ext4_free_blocks_count_set(es, 460657042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 460757042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4608d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 46097f93cff9STheodore Ts'o es->s_free_inodes_count = 46107f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 46115d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4612ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 461306db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 46141566a48aSTheodore Ts'o if (sync) 46154743f839SPranay Kr. Srivastava lock_buffer(sbh); 46164743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 46174743f839SPranay Kr. Srivastava /* 46184743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 46194743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 46204743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 46214743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 46224743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 46234743f839SPranay Kr. Srivastava * write and hope for the best. 46244743f839SPranay Kr. Srivastava */ 46254743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 46264743f839SPranay Kr. Srivastava "superblock detected"); 46274743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 46284743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 46294743f839SPranay Kr. Srivastava } 4630ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4631914258bfSTheodore Ts'o if (sync) { 46321566a48aSTheodore Ts'o unlock_buffer(sbh); 4633564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 463470fd7614SChristoph Hellwig test_opt(sb, BARRIER) ? REQ_FUA : REQ_SYNC); 4635c4be0c1dSTakashi Sato if (error) 4636c4be0c1dSTakashi Sato return error; 4637c4be0c1dSTakashi Sato 4638c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4639c4be0c1dSTakashi Sato if (error) { 4640b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4641b31e1552SEric Sandeen "superblock"); 4642914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4643914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4644914258bfSTheodore Ts'o } 4645914258bfSTheodore Ts'o } 4646c4be0c1dSTakashi Sato return error; 4647ac27a0ecSDave Kleikamp } 4648ac27a0ecSDave Kleikamp 4649ac27a0ecSDave Kleikamp /* 4650ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4651ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4652ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4653ac27a0ecSDave Kleikamp */ 4654617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4655617ba13bSMingming Cao struct ext4_super_block *es) 4656ac27a0ecSDave Kleikamp { 4657617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4658ac27a0ecSDave Kleikamp 4659e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 46600390131bSFrank Mayhar BUG_ON(journal != NULL); 46610390131bSFrank Mayhar return; 46620390131bSFrank Mayhar } 4663dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46647ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46657ffe1ea8SHidehiro Kawai goto out; 46667ffe1ea8SHidehiro Kawai 4667e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb) && 4668ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4669e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4670e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4671ac27a0ecSDave Kleikamp } 46727ffe1ea8SHidehiro Kawai 46737ffe1ea8SHidehiro Kawai out: 4674dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4675ac27a0ecSDave Kleikamp } 4676ac27a0ecSDave Kleikamp 4677ac27a0ecSDave Kleikamp /* 4678ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4679ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4680ac27a0ecSDave Kleikamp * main filesystem now. 4681ac27a0ecSDave Kleikamp */ 4682617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4683617ba13bSMingming Cao struct ext4_super_block *es) 4684ac27a0ecSDave Kleikamp { 4685ac27a0ecSDave Kleikamp journal_t *journal; 4686ac27a0ecSDave Kleikamp int j_errno; 4687ac27a0ecSDave Kleikamp const char *errstr; 4688ac27a0ecSDave Kleikamp 4689e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 46900390131bSFrank Mayhar 4691617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4692ac27a0ecSDave Kleikamp 4693ac27a0ecSDave Kleikamp /* 4694ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4695617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4696ac27a0ecSDave Kleikamp */ 4697ac27a0ecSDave Kleikamp 4698dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4699ac27a0ecSDave Kleikamp if (j_errno) { 4700ac27a0ecSDave Kleikamp char nbuf[16]; 4701ac27a0ecSDave Kleikamp 4702617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 470312062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4704ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 470512062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4706ac27a0ecSDave Kleikamp 4707617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4708617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4709e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4710ac27a0ecSDave Kleikamp 4711dab291afSMingming Cao jbd2_journal_clear_err(journal); 4712d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4713ac27a0ecSDave Kleikamp } 4714ac27a0ecSDave Kleikamp } 4715ac27a0ecSDave Kleikamp 4716ac27a0ecSDave Kleikamp /* 4717ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4718ac27a0ecSDave Kleikamp * and wait on the commit. 4719ac27a0ecSDave Kleikamp */ 4720617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4721ac27a0ecSDave Kleikamp { 4722ac27a0ecSDave Kleikamp journal_t *journal; 4723ac27a0ecSDave Kleikamp 4724ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4725ac27a0ecSDave Kleikamp return 0; 4726ac27a0ecSDave Kleikamp 4727617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4728b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4729ac27a0ecSDave Kleikamp } 4730ac27a0ecSDave Kleikamp 4731617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4732ac27a0ecSDave Kleikamp { 473314ce0cb4STheodore Ts'o int ret = 0; 47349eddacf9SJan Kara tid_t target; 473506a407f1SDmitry Monakhov bool needs_barrier = false; 47368d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4737ac27a0ecSDave Kleikamp 47380db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 47390db1ff22STheodore Ts'o return 0; 47400db1ff22STheodore Ts'o 47419bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 47422e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4743a1177825SJan Kara /* 4744a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4745a1177825SJan Kara * no dirty dquots 4746a1177825SJan Kara */ 4747a1177825SJan Kara dquot_writeback_dquots(sb, -1); 474806a407f1SDmitry Monakhov /* 474906a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 475006a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 475106a407f1SDmitry Monakhov * transaction_commit will do it for us. 475206a407f1SDmitry Monakhov */ 4753bda32530STheodore Ts'o if (sbi->s_journal) { 475406a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 475506a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 475606a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 475706a407f1SDmitry Monakhov needs_barrier = true; 475806a407f1SDmitry Monakhov 47598d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4760ac27a0ecSDave Kleikamp if (wait) 4761bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4762bda32530STheodore Ts'o target); 47630390131bSFrank Mayhar } 4764bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4765bda32530STheodore Ts'o needs_barrier = true; 476606a407f1SDmitry Monakhov if (needs_barrier) { 476706a407f1SDmitry Monakhov int err; 476806a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 476906a407f1SDmitry Monakhov if (!ret) 477006a407f1SDmitry Monakhov ret = err; 477106a407f1SDmitry Monakhov } 477206a407f1SDmitry Monakhov 477306a407f1SDmitry Monakhov return ret; 477406a407f1SDmitry Monakhov } 477506a407f1SDmitry Monakhov 4776ac27a0ecSDave Kleikamp /* 4777ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4778ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4779be4f27d3SYongqiang Yang * 4780be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47818e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47828e8ad8a5SJan Kara * modifications. 4783ac27a0ecSDave Kleikamp */ 4784c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4785ac27a0ecSDave Kleikamp { 4786c4be0c1dSTakashi Sato int error = 0; 4787c4be0c1dSTakashi Sato journal_t *journal; 4788ac27a0ecSDave Kleikamp 47899ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47909ca92389STheodore Ts'o return 0; 47919ca92389STheodore Ts'o 4792c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4793ac27a0ecSDave Kleikamp 4794bb044576STheodore Ts'o if (journal) { 4795ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4796dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47977ffe1ea8SHidehiro Kawai 47987ffe1ea8SHidehiro Kawai /* 4799bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4800bb044576STheodore Ts'o * flush the journal. 48017ffe1ea8SHidehiro Kawai */ 4802c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 48036b0310fbSEric Sandeen if (error < 0) 48046b0310fbSEric Sandeen goto out; 4805ac27a0ecSDave Kleikamp 4806ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4807e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4808c642dc9eSEric Sandeen } 4809c642dc9eSEric Sandeen 4810e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 48116b0310fbSEric Sandeen out: 4812bb044576STheodore Ts'o if (journal) 48138e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4814bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 48156b0310fbSEric Sandeen return error; 4816ac27a0ecSDave Kleikamp } 4817ac27a0ecSDave Kleikamp 4818ac27a0ecSDave Kleikamp /* 4819ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4820ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4821ac27a0ecSDave Kleikamp */ 4822c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4823ac27a0ecSDave Kleikamp { 4824783d9485STheodore Ts'o if ((sb->s_flags & MS_RDONLY) || ext4_forced_shutdown(EXT4_SB(sb))) 48259ca92389STheodore Ts'o return 0; 48269ca92389STheodore Ts'o 4827c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 48289ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4829e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 4830c642dc9eSEric Sandeen } 4831c642dc9eSEric Sandeen 4832e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4833c4be0c1dSTakashi Sato return 0; 4834ac27a0ecSDave Kleikamp } 4835ac27a0ecSDave Kleikamp 4836673c6100STheodore Ts'o /* 4837673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4838673c6100STheodore Ts'o */ 4839673c6100STheodore Ts'o struct ext4_mount_options { 4840673c6100STheodore Ts'o unsigned long s_mount_opt; 4841a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 484208cefc7aSEric W. Biederman kuid_t s_resuid; 484308cefc7aSEric W. Biederman kgid_t s_resgid; 4844673c6100STheodore Ts'o unsigned long s_commit_interval; 4845673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4846673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4847673c6100STheodore Ts'o int s_jquota_fmt; 4848a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4849673c6100STheodore Ts'o #endif 4850673c6100STheodore Ts'o }; 4851673c6100STheodore Ts'o 4852617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4853ac27a0ecSDave Kleikamp { 4854617ba13bSMingming Cao struct ext4_super_block *es; 4855617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4856ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4857617ba13bSMingming Cao struct ext4_mount_options old_opts; 4858c79d967dSChristoph Hellwig int enable_quota = 0; 48598a266467STheodore Ts'o ext4_group_t g; 4860b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4861c5e06d10SJohann Lombardi int err = 0; 4862ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 486303dafb5fSChen Gang int i, j; 4864ac27a0ecSDave Kleikamp #endif 4865d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4866ac27a0ecSDave Kleikamp 4867ac27a0ecSDave Kleikamp /* Store the original options */ 4868ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4869ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4870a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4871ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4872ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4873ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 487430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 487530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4876ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4877ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4878a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 487903dafb5fSChen Gang if (sbi->s_qf_names[i]) { 488003dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 488103dafb5fSChen Gang GFP_KERNEL); 488203dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 488303dafb5fSChen Gang for (j = 0; j < i; j++) 488403dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48853e36a163SWei Yongjun kfree(orig_data); 488603dafb5fSChen Gang return -ENOMEM; 488703dafb5fSChen Gang } 488803dafb5fSChen Gang } else 488903dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4890ac27a0ecSDave Kleikamp #endif 4891b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4892b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4893ac27a0ecSDave Kleikamp 4894661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4895ac27a0ecSDave Kleikamp err = -EINVAL; 4896ac27a0ecSDave Kleikamp goto restore_opts; 4897ac27a0ecSDave Kleikamp } 4898ac27a0ecSDave Kleikamp 48996b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 49006b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 49016b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 49022d5b86e0SEric Sandeen "during remount not supported; ignoring"); 49032d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4904c6d3d56dSDarrick J. Wong } 4905c6d3d56dSDarrick J. Wong 49066ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 49076ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 49086ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49096ae6514bSPiotr Sarna "both data=journal and delalloc"); 49106ae6514bSPiotr Sarna err = -EINVAL; 49116ae6514bSPiotr Sarna goto restore_opts; 49126ae6514bSPiotr Sarna } 49136ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 49146ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49156ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 49166ae6514bSPiotr Sarna err = -EINVAL; 49176ae6514bSPiotr Sarna goto restore_opts; 49186ae6514bSPiotr Sarna } 4919923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4920923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4921923ae0ffSRoss Zwisler "both data=journal and dax"); 4922923ae0ffSRoss Zwisler err = -EINVAL; 4923923ae0ffSRoss Zwisler goto restore_opts; 4924923ae0ffSRoss Zwisler } 4925ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 4926ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4927ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4928ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4929ab04df78SJan Kara err = -EINVAL; 4930ab04df78SJan Kara goto restore_opts; 4931ab04df78SJan Kara } 4932923ae0ffSRoss Zwisler } 4933923ae0ffSRoss Zwisler 4934923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4935923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4936923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4937923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 49386ae6514bSPiotr Sarna } 49396ae6514bSPiotr Sarna 49404ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4941c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4942ac27a0ecSDave Kleikamp 4943ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4944482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4945ac27a0ecSDave Kleikamp 4946ac27a0ecSDave Kleikamp es = sbi->s_es; 4947ac27a0ecSDave Kleikamp 4948b3881f74STheodore Ts'o if (sbi->s_journal) { 4949617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4950b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4951b3881f74STheodore Ts'o } 4952ac27a0ecSDave Kleikamp 4953a2fd66d0STheodore Ts'o if (*flags & MS_LAZYTIME) 4954a2fd66d0STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 4955a2fd66d0STheodore Ts'o 4956661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 49574ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4958ac27a0ecSDave Kleikamp err = -EROFS; 4959ac27a0ecSDave Kleikamp goto restore_opts; 4960ac27a0ecSDave Kleikamp } 4961ac27a0ecSDave Kleikamp 4962ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 496338c03b34STheodore Ts'o err = sync_filesystem(sb); 496438c03b34STheodore Ts'o if (err < 0) 496538c03b34STheodore Ts'o goto restore_opts; 49660f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 49670f0dd62fSChristoph Hellwig if (err < 0) 4968c79d967dSChristoph Hellwig goto restore_opts; 4969c79d967dSChristoph Hellwig 4970ac27a0ecSDave Kleikamp /* 4971ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4972ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4973ac27a0ecSDave Kleikamp */ 4974ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4975ac27a0ecSDave Kleikamp 4976ac27a0ecSDave Kleikamp /* 4977ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4978ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4979ac27a0ecSDave Kleikamp * mark the partition as valid again. 4980ac27a0ecSDave Kleikamp */ 4981617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4982617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4983ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4984ac27a0ecSDave Kleikamp 4985a63c9eb2STheodore Ts'o if (sbi->s_journal) 4986617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4987ac27a0ecSDave Kleikamp } else { 4988a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4989e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 49902cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 4991ac27a0ecSDave Kleikamp err = -EROFS; 4992ac27a0ecSDave Kleikamp goto restore_opts; 4993ac27a0ecSDave Kleikamp } 4994ead6596bSEric Sandeen /* 49958a266467STheodore Ts'o * Make sure the group descriptor checksums 49960b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49978a266467STheodore Ts'o */ 49988a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49998a266467STheodore Ts'o struct ext4_group_desc *gdp = 50008a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 50018a266467STheodore Ts'o 5002feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5003b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5004b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5005e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 50068a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 50076a797d27SDarrick J. Wong err = -EFSBADCRC; 50088a266467STheodore Ts'o goto restore_opts; 50098a266467STheodore Ts'o } 50108a266467STheodore Ts'o } 50118a266467STheodore Ts'o 50128a266467STheodore Ts'o /* 5013ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5014ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5015ead6596bSEric Sandeen * require a full umount/remount for now. 5016ead6596bSEric Sandeen */ 5017ead6596bSEric Sandeen if (es->s_last_orphan) { 5018b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5019ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5020ead6596bSEric Sandeen "orphan inode list. Please " 5021b31e1552SEric Sandeen "umount/remount instead"); 5022ead6596bSEric Sandeen err = -EINVAL; 5023ead6596bSEric Sandeen goto restore_opts; 5024ead6596bSEric Sandeen } 5025ead6596bSEric Sandeen 5026ac27a0ecSDave Kleikamp /* 5027ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5028ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5029ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5030ac27a0ecSDave Kleikamp * the partition.) 5031ac27a0ecSDave Kleikamp */ 50320390131bSFrank Mayhar if (sbi->s_journal) 5033617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5034ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5035617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 5036ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 5037e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5038c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5039c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5040c5e06d10SJohann Lombardi err = -EROFS; 5041c5e06d10SJohann Lombardi goto restore_opts; 5042c5e06d10SJohann Lombardi } 5043c79d967dSChristoph Hellwig enable_quota = 1; 5044ac27a0ecSDave Kleikamp } 5045ac27a0ecSDave Kleikamp } 5046bfff6873SLukas Czerner 5047bfff6873SLukas Czerner /* 5048bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5049bfff6873SLukas Czerner * current settings 5050bfff6873SLukas Czerner */ 5051bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 5052bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5053bfff6873SLukas Czerner else { 5054bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5055bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5056bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5057bfff6873SLukas Czerner } 5058bfff6873SLukas Czerner 50596fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5060d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 5061e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 50620390131bSFrank Mayhar 5063ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5064ac27a0ecSDave Kleikamp /* Release old quota file names */ 5065a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5066ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 50677c319d32SAditya Kali if (enable_quota) { 50687c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 50690f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5070e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 50717c319d32SAditya Kali err = ext4_enable_quotas(sb); 507207724f98STheodore Ts'o if (err) 50737c319d32SAditya Kali goto restore_opts; 50747c319d32SAditya Kali } 50757c319d32SAditya Kali } 50767c319d32SAditya Kali #endif 5077d4c402d9SCurt Wohlgemuth 5078a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 5079d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5080d4c402d9SCurt Wohlgemuth kfree(orig_data); 5081ac27a0ecSDave Kleikamp return 0; 50820b8e58a1SAndreas Dilger 5083ac27a0ecSDave Kleikamp restore_opts: 5084ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5085ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5086a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5087ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5088ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5089ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 509030773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 509130773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5092ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5093ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5094a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5095ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5096ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5097ac27a0ecSDave Kleikamp } 5098ac27a0ecSDave Kleikamp #endif 5099d4c402d9SCurt Wohlgemuth kfree(orig_data); 5100ac27a0ecSDave Kleikamp return err; 5101ac27a0ecSDave Kleikamp } 5102ac27a0ecSDave Kleikamp 5103689c958cSLi Xi #ifdef CONFIG_QUOTA 5104689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5105689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5106689c958cSLi Xi { 5107689c958cSLi Xi struct kqid qid; 5108689c958cSLi Xi struct dquot *dquot; 5109689c958cSLi Xi u64 limit; 5110689c958cSLi Xi u64 curblock; 5111689c958cSLi Xi 5112689c958cSLi Xi qid = make_kqid_projid(projid); 5113689c958cSLi Xi dquot = dqget(sb, qid); 5114689c958cSLi Xi if (IS_ERR(dquot)) 5115689c958cSLi Xi return PTR_ERR(dquot); 5116689c958cSLi Xi spin_lock(&dq_data_lock); 5117689c958cSLi Xi 5118689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 5119689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 5120689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 5121689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5122689c958cSLi Xi curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; 5123689c958cSLi Xi buf->f_blocks = limit; 5124689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5125689c958cSLi Xi (buf->f_blocks > curblock) ? 5126689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5127689c958cSLi Xi } 5128689c958cSLi Xi 5129689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 5130689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 5131689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 5132689c958cSLi Xi if (limit && buf->f_files > limit) { 5133689c958cSLi Xi buf->f_files = limit; 5134689c958cSLi Xi buf->f_ffree = 5135689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5136689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5137689c958cSLi Xi } 5138689c958cSLi Xi 5139689c958cSLi Xi spin_unlock(&dq_data_lock); 5140689c958cSLi Xi dqput(dquot); 5141689c958cSLi Xi return 0; 5142689c958cSLi Xi } 5143689c958cSLi Xi #endif 5144689c958cSLi Xi 5145617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5146ac27a0ecSDave Kleikamp { 5147ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5148617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5149617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 515027dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5151960cc398SPekka Enberg u64 fsid; 5152d02a9391SKazuya Mio s64 bfree; 515327dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5154ac27a0ecSDave Kleikamp 5155952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5156952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5157ac27a0ecSDave Kleikamp 5158617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5159ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5160b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 516157042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 516257042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5163d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 516457042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 516527dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 516627dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 516727dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5168ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5169ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 517052d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5171617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5172960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5173960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5174960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5175960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 51760b8e58a1SAndreas Dilger 5177689c958cSLi Xi #ifdef CONFIG_QUOTA 5178689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5179689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5180689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5181689c958cSLi Xi #endif 5182ac27a0ecSDave Kleikamp return 0; 5183ac27a0ecSDave Kleikamp } 5184ac27a0ecSDave Kleikamp 51850b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 51860b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5187ac27a0ecSDave Kleikamp * Process 1 Process 2 5188617ba13bSMingming Cao * ext4_create() quota_sync() 5189dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5190871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5191dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5192ac27a0ecSDave Kleikamp * 5193ac27a0ecSDave Kleikamp */ 5194ac27a0ecSDave Kleikamp 5195ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5196ac27a0ecSDave Kleikamp 5197ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5198ac27a0ecSDave Kleikamp { 51994c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5200ac27a0ecSDave Kleikamp } 5201ac27a0ecSDave Kleikamp 5202617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5203ac27a0ecSDave Kleikamp { 5204ac27a0ecSDave Kleikamp int ret, err; 5205ac27a0ecSDave Kleikamp handle_t *handle; 5206ac27a0ecSDave Kleikamp struct inode *inode; 5207ac27a0ecSDave Kleikamp 5208ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 52099924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5210617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5211ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5212ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5213ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5214617ba13bSMingming Cao err = ext4_journal_stop(handle); 5215ac27a0ecSDave Kleikamp if (!ret) 5216ac27a0ecSDave Kleikamp ret = err; 5217ac27a0ecSDave Kleikamp return ret; 5218ac27a0ecSDave Kleikamp } 5219ac27a0ecSDave Kleikamp 5220617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5221ac27a0ecSDave Kleikamp { 5222ac27a0ecSDave Kleikamp int ret, err; 5223ac27a0ecSDave Kleikamp handle_t *handle; 5224ac27a0ecSDave Kleikamp 52259924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5226617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5227ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5228ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5229ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5230617ba13bSMingming Cao err = ext4_journal_stop(handle); 5231ac27a0ecSDave Kleikamp if (!ret) 5232ac27a0ecSDave Kleikamp ret = err; 5233ac27a0ecSDave Kleikamp return ret; 5234ac27a0ecSDave Kleikamp } 5235ac27a0ecSDave Kleikamp 5236617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5237ac27a0ecSDave Kleikamp { 5238ac27a0ecSDave Kleikamp int ret, err; 5239ac27a0ecSDave Kleikamp handle_t *handle; 5240ac27a0ecSDave Kleikamp 52419924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5242617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 52439c3013e9SJan Kara if (IS_ERR(handle)) { 52449c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 52459c3013e9SJan Kara dquot_release(dquot); 5246ac27a0ecSDave Kleikamp return PTR_ERR(handle); 52479c3013e9SJan Kara } 5248ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5249617ba13bSMingming Cao err = ext4_journal_stop(handle); 5250ac27a0ecSDave Kleikamp if (!ret) 5251ac27a0ecSDave Kleikamp ret = err; 5252ac27a0ecSDave Kleikamp return ret; 5253ac27a0ecSDave Kleikamp } 5254ac27a0ecSDave Kleikamp 5255617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5256ac27a0ecSDave Kleikamp { 5257262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5258262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5259262b4662SJan Kara 52602c8be6b2SJan Kara /* Are we journaling quotas? */ 5261e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5262262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5263ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5264617ba13bSMingming Cao return ext4_write_dquot(dquot); 5265ac27a0ecSDave Kleikamp } else { 5266ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5267ac27a0ecSDave Kleikamp } 5268ac27a0ecSDave Kleikamp } 5269ac27a0ecSDave Kleikamp 5270617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5271ac27a0ecSDave Kleikamp { 5272ac27a0ecSDave Kleikamp int ret, err; 5273ac27a0ecSDave Kleikamp handle_t *handle; 5274ac27a0ecSDave Kleikamp 5275ac27a0ecSDave Kleikamp /* Data block + inode block */ 52762b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5277ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5278ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5279ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5280617ba13bSMingming Cao err = ext4_journal_stop(handle); 5281ac27a0ecSDave Kleikamp if (!ret) 5282ac27a0ecSDave Kleikamp ret = err; 5283ac27a0ecSDave Kleikamp return ret; 5284ac27a0ecSDave Kleikamp } 5285ac27a0ecSDave Kleikamp 5286ac27a0ecSDave Kleikamp /* 5287ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5288ac27a0ecSDave Kleikamp * the quota file and such... 5289ac27a0ecSDave Kleikamp */ 5290617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5291ac27a0ecSDave Kleikamp { 5292287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5293617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5294ac27a0ecSDave Kleikamp } 5295ac27a0ecSDave Kleikamp 5296daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5297daf647d2STheodore Ts'o { 5298daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5299daf647d2STheodore Ts'o 5300daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5301daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5302daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5303daf647d2STheodore Ts'o * because the name of the lock is set using the 5304daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5305daf647d2STheodore Ts'o */ 5306daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5307daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5308daf647d2STheodore Ts'o } 5309daf647d2STheodore Ts'o 5310ac27a0ecSDave Kleikamp /* 5311ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5312ac27a0ecSDave Kleikamp */ 5313617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 53148c54ca9cSAl Viro const struct path *path) 5315ac27a0ecSDave Kleikamp { 5316ac27a0ecSDave Kleikamp int err; 5317ac27a0ecSDave Kleikamp 5318ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5319ac27a0ecSDave Kleikamp return -EINVAL; 53200623543bSJan Kara 5321ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5322d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5323ac27a0ecSDave Kleikamp return -EXDEV; 53240623543bSJan Kara /* Journaling quota? */ 53250623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 53262b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5327f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5328b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5329b31e1552SEric Sandeen "Quota file not on filesystem root. " 5330b31e1552SEric Sandeen "Journaled quota will not work"); 53310623543bSJan Kara } 53320623543bSJan Kara 53330623543bSJan Kara /* 53340623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 53350623543bSJan Kara * all updates to the file when we bypass pagecache... 53360623543bSJan Kara */ 53370390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 53382b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 53390623543bSJan Kara /* 53400623543bSJan Kara * We don't need to lock updates but journal_flush() could 53410623543bSJan Kara * otherwise be livelocked... 53420623543bSJan Kara */ 53430623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 53447ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 53450623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5346f00c9e44SJan Kara if (err) 53477ffe1ea8SHidehiro Kawai return err; 53487ffe1ea8SHidehiro Kawai } 5349daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5350daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5351daf647d2STheodore Ts'o if (err) 5352daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5353daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5354daf647d2STheodore Ts'o return err; 5355ac27a0ecSDave Kleikamp } 5356ac27a0ecSDave Kleikamp 53577c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 53587c319d32SAditya Kali unsigned int flags) 53597c319d32SAditya Kali { 53607c319d32SAditya Kali int err; 53617c319d32SAditya Kali struct inode *qf_inode; 5362a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 53637c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5364689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5365689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 53667c319d32SAditya Kali }; 53677c319d32SAditya Kali 5368e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 53697c319d32SAditya Kali 53707c319d32SAditya Kali if (!qf_inums[type]) 53717c319d32SAditya Kali return -EPERM; 53727c319d32SAditya Kali 53737c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 53747c319d32SAditya Kali if (IS_ERR(qf_inode)) { 53757c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 53767c319d32SAditya Kali return PTR_ERR(qf_inode); 53777c319d32SAditya Kali } 53787c319d32SAditya Kali 5379bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5380bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5381daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 53827c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 53837c319d32SAditya Kali iput(qf_inode); 5384daf647d2STheodore Ts'o if (err) 5385daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 53867c319d32SAditya Kali 53877c319d32SAditya Kali return err; 53887c319d32SAditya Kali } 53897c319d32SAditya Kali 53907c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 53917c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 53927c319d32SAditya Kali { 53937c319d32SAditya Kali int type, err = 0; 5394a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 53957c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5396689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5397689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 53987c319d32SAditya Kali }; 539949da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 540049da9392SJan Kara test_opt(sb, USRQUOTA), 540149da9392SJan Kara test_opt(sb, GRPQUOTA), 540249da9392SJan Kara test_opt(sb, PRJQUOTA), 540349da9392SJan Kara }; 54047c319d32SAditya Kali 54057c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5406a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 54077c319d32SAditya Kali if (qf_inums[type]) { 54087c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 540949da9392SJan Kara DQUOT_USAGE_ENABLED | 541049da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 54117c319d32SAditya Kali if (err) { 54127c319d32SAditya Kali ext4_warning(sb, 541372ba7450STheodore Ts'o "Failed to enable quota tracking " 541472ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 541572ba7450STheodore Ts'o "e2fsck to fix.", type, err); 54167c319d32SAditya Kali return err; 54177c319d32SAditya Kali } 54187c319d32SAditya Kali } 54197c319d32SAditya Kali } 54207c319d32SAditya Kali return 0; 54217c319d32SAditya Kali } 54227c319d32SAditya Kali 5423ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5424ca0e05e4SDmitry Monakhov { 542521f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 542621f97697SJan Kara handle_t *handle; 542721f97697SJan Kara 542887009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 542987009d86SDmitry Monakhov * Caller already holds s_umount sem */ 543087009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5431ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5432ca0e05e4SDmitry Monakhov 54330b268590SAmir Goldstein if (!inode) 54340b268590SAmir Goldstein goto out; 54350b268590SAmir Goldstein 543621f97697SJan Kara /* Update modification times of quota files when userspace can 543721f97697SJan Kara * start looking at them */ 54389924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 543921f97697SJan Kara if (IS_ERR(handle)) 544021f97697SJan Kara goto out; 5441eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 544221f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 544321f97697SJan Kara ext4_journal_stop(handle); 544421f97697SJan Kara 544521f97697SJan Kara out: 5446ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5447ca0e05e4SDmitry Monakhov } 5448ca0e05e4SDmitry Monakhov 5449ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5450ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5451ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5452ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5453617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5454ac27a0ecSDave Kleikamp size_t len, loff_t off) 5455ac27a0ecSDave Kleikamp { 5456ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5457725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5458ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5459ac27a0ecSDave Kleikamp int tocopy; 5460ac27a0ecSDave Kleikamp size_t toread; 5461ac27a0ecSDave Kleikamp struct buffer_head *bh; 5462ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5463ac27a0ecSDave Kleikamp 5464ac27a0ecSDave Kleikamp if (off > i_size) 5465ac27a0ecSDave Kleikamp return 0; 5466ac27a0ecSDave Kleikamp if (off+len > i_size) 5467ac27a0ecSDave Kleikamp len = i_size-off; 5468ac27a0ecSDave Kleikamp toread = len; 5469ac27a0ecSDave Kleikamp while (toread > 0) { 5470ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5471ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 54721c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 54731c215028STheodore Ts'o if (IS_ERR(bh)) 54741c215028STheodore Ts'o return PTR_ERR(bh); 5475ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5476ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5477ac27a0ecSDave Kleikamp else 5478ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5479ac27a0ecSDave Kleikamp brelse(bh); 5480ac27a0ecSDave Kleikamp offset = 0; 5481ac27a0ecSDave Kleikamp toread -= tocopy; 5482ac27a0ecSDave Kleikamp data += tocopy; 5483ac27a0ecSDave Kleikamp blk++; 5484ac27a0ecSDave Kleikamp } 5485ac27a0ecSDave Kleikamp return len; 5486ac27a0ecSDave Kleikamp } 5487ac27a0ecSDave Kleikamp 5488ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5489ac27a0ecSDave Kleikamp * enough credits) */ 5490617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5491ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5492ac27a0ecSDave Kleikamp { 5493ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5494725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 54951c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5496c5e298aeSTheodore Ts'o int retries = 0; 5497ac27a0ecSDave Kleikamp struct buffer_head *bh; 5498ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5499ac27a0ecSDave Kleikamp 55000390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5501b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5502b31e1552SEric Sandeen " cancelled because transaction is not started", 55039c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 55049c3013e9SJan Kara return -EIO; 55059c3013e9SJan Kara } 550667eeb568SDmitry Monakhov /* 550767eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 550867eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 550967eeb568SDmitry Monakhov */ 551067eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 551167eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 551267eeb568SDmitry Monakhov " cancelled because not block aligned", 551367eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 551467eeb568SDmitry Monakhov return -EIO; 551567eeb568SDmitry Monakhov } 551667eeb568SDmitry Monakhov 5517c5e298aeSTheodore Ts'o do { 5518c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5519c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5520c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5521c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5522c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 55231c215028STheodore Ts'o if (IS_ERR(bh)) 55241c215028STheodore Ts'o return PTR_ERR(bh); 5525ac27a0ecSDave Kleikamp if (!bh) 5526ac27a0ecSDave Kleikamp goto out; 55275d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5528617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5529ac27a0ecSDave Kleikamp if (err) { 5530ac27a0ecSDave Kleikamp brelse(bh); 55311c215028STheodore Ts'o return err; 5532ac27a0ecSDave Kleikamp } 5533ac27a0ecSDave Kleikamp lock_buffer(bh); 553467eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5535ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5536ac27a0ecSDave Kleikamp unlock_buffer(bh); 55370390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5538ac27a0ecSDave Kleikamp brelse(bh); 5539ac27a0ecSDave Kleikamp out: 554067eeb568SDmitry Monakhov if (inode->i_size < off + len) { 554167eeb568SDmitry Monakhov i_size_write(inode, off + len); 5542617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5543617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 554421f97697SJan Kara } 554567eeb568SDmitry Monakhov return len; 5546ac27a0ecSDave Kleikamp } 5547ac27a0ecSDave Kleikamp 55488f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 55498f0e8746STheodore Ts'o { 55508f0e8746STheodore Ts'o const struct quota_format_ops *ops; 55518f0e8746STheodore Ts'o 55528f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 55538f0e8746STheodore Ts'o return -ESRCH; 55548f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 55558f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 55568f0e8746STheodore Ts'o return -ENOSYS; 55578f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 55588f0e8746STheodore Ts'o } 5559ac27a0ecSDave Kleikamp #endif 5560ac27a0ecSDave Kleikamp 5561152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5562152a0836SAl Viro const char *dev_name, void *data) 5563ac27a0ecSDave Kleikamp { 5564152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5565ac27a0ecSDave Kleikamp } 5566ac27a0ecSDave Kleikamp 5567c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 556824b58424STheodore Ts'o static inline void register_as_ext2(void) 556924b58424STheodore Ts'o { 557024b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 557124b58424STheodore Ts'o if (err) 557224b58424STheodore Ts'o printk(KERN_WARNING 557324b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 557424b58424STheodore Ts'o } 557524b58424STheodore Ts'o 557624b58424STheodore Ts'o static inline void unregister_as_ext2(void) 557724b58424STheodore Ts'o { 557824b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 557924b58424STheodore Ts'o } 55802035e776STheodore Ts'o 55812035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 55822035e776STheodore Ts'o { 5583e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 55842035e776STheodore Ts'o return 0; 55852035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 55862035e776STheodore Ts'o return 1; 5587e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 55882035e776STheodore Ts'o return 0; 55892035e776STheodore Ts'o return 1; 55902035e776STheodore Ts'o } 559124b58424STheodore Ts'o #else 559224b58424STheodore Ts'o static inline void register_as_ext2(void) { } 559324b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 55942035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 559524b58424STheodore Ts'o #endif 559624b58424STheodore Ts'o 559724b58424STheodore Ts'o static inline void register_as_ext3(void) 559824b58424STheodore Ts'o { 559924b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 560024b58424STheodore Ts'o if (err) 560124b58424STheodore Ts'o printk(KERN_WARNING 560224b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 560324b58424STheodore Ts'o } 560424b58424STheodore Ts'o 560524b58424STheodore Ts'o static inline void unregister_as_ext3(void) 560624b58424STheodore Ts'o { 560724b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 560824b58424STheodore Ts'o } 56092035e776STheodore Ts'o 56102035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 56112035e776STheodore Ts'o { 5612e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 56132035e776STheodore Ts'o return 0; 5614e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 56152035e776STheodore Ts'o return 0; 56162035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 56172035e776STheodore Ts'o return 1; 5618e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 56192035e776STheodore Ts'o return 0; 56202035e776STheodore Ts'o return 1; 56212035e776STheodore Ts'o } 562224b58424STheodore Ts'o 562303010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5624ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 562503010a33STheodore Ts'o .name = "ext4", 5626152a0836SAl Viro .mount = ext4_mount, 5627ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5628ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5629ac27a0ecSDave Kleikamp }; 56307f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5631ac27a0ecSDave Kleikamp 5632e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5633e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5634e9e3bcecSEric Sandeen 56355dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5636ac27a0ecSDave Kleikamp { 5637e9e3bcecSEric Sandeen int i, err; 5638c9de560dSAlex Tomas 5639e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 564007c0c5d8SAl Viro ext4_li_info = NULL; 564107c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 564207c0c5d8SAl Viro 56439a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 564412e9b892SDmitry Monakhov ext4_check_flag_values(); 5645e9e3bcecSEric Sandeen 5646e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5647e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5648e9e3bcecSEric Sandeen 564951865fdaSZheng Liu err = ext4_init_es(); 56506fd058f7STheodore Ts'o if (err) 56516fd058f7STheodore Ts'o return err; 565251865fdaSZheng Liu 565351865fdaSZheng Liu err = ext4_init_pageio(); 565451865fdaSZheng Liu if (err) 5655b5799018STheodore Ts'o goto out5; 565651865fdaSZheng Liu 56575dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5658bd2d0210STheodore Ts'o if (err) 5659b5799018STheodore Ts'o goto out4; 5660857ac889SLukas Czerner 5661b5799018STheodore Ts'o err = ext4_init_sysfs(); 5662dd68314cSTheodore Ts'o if (err) 5663b5799018STheodore Ts'o goto out3; 5664857ac889SLukas Czerner 56655dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5666ac27a0ecSDave Kleikamp if (err) 5667c9de560dSAlex Tomas goto out2; 5668ac27a0ecSDave Kleikamp err = init_inodecache(); 5669ac27a0ecSDave Kleikamp if (err) 5670ac27a0ecSDave Kleikamp goto out1; 567124b58424STheodore Ts'o register_as_ext3(); 56722035e776STheodore Ts'o register_as_ext2(); 567303010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5674ac27a0ecSDave Kleikamp if (err) 5675ac27a0ecSDave Kleikamp goto out; 5676bfff6873SLukas Czerner 5677ac27a0ecSDave Kleikamp return 0; 5678ac27a0ecSDave Kleikamp out: 567924b58424STheodore Ts'o unregister_as_ext2(); 568024b58424STheodore Ts'o unregister_as_ext3(); 5681ac27a0ecSDave Kleikamp destroy_inodecache(); 5682ac27a0ecSDave Kleikamp out1: 56835dabfc78STheodore Ts'o ext4_exit_mballoc(); 56849c191f70ST Makphaibulchoke out2: 5685b5799018STheodore Ts'o ext4_exit_sysfs(); 5686b5799018STheodore Ts'o out3: 5687dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5688b5799018STheodore Ts'o out4: 56895dabfc78STheodore Ts'o ext4_exit_pageio(); 5690b5799018STheodore Ts'o out5: 569151865fdaSZheng Liu ext4_exit_es(); 569251865fdaSZheng Liu 5693ac27a0ecSDave Kleikamp return err; 5694ac27a0ecSDave Kleikamp } 5695ac27a0ecSDave Kleikamp 56965dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5697ac27a0ecSDave Kleikamp { 5698bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 569924b58424STheodore Ts'o unregister_as_ext2(); 570024b58424STheodore Ts'o unregister_as_ext3(); 570103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5702ac27a0ecSDave Kleikamp destroy_inodecache(); 57035dabfc78STheodore Ts'o ext4_exit_mballoc(); 5704b5799018STheodore Ts'o ext4_exit_sysfs(); 57055dabfc78STheodore Ts'o ext4_exit_system_zone(); 57065dabfc78STheodore Ts'o ext4_exit_pageio(); 5707dd12ed14SEric Sandeen ext4_exit_es(); 5708ac27a0ecSDave Kleikamp } 5709ac27a0ecSDave Kleikamp 5710ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 571183982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5712ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 57135dabfc78STheodore Ts'o module_init(ext4_init_fs) 57145dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5715