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 842957153fcSJan Kara #ifdef CONFIG_QUOTA 843957153fcSJan Kara static int ext4_quota_off(struct super_block *sb, int type); 844957153fcSJan Kara 845957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 846957153fcSJan Kara { 847957153fcSJan Kara int type; 848957153fcSJan Kara 849957153fcSJan Kara if (ext4_has_feature_quota(sb)) { 850957153fcSJan Kara dquot_disable(sb, -1, 851957153fcSJan Kara DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 852957153fcSJan Kara } else { 853957153fcSJan Kara /* Use our quota_off function to clear inode flags etc. */ 854957153fcSJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) 855957153fcSJan Kara ext4_quota_off(sb, type); 856957153fcSJan Kara } 857957153fcSJan Kara } 858957153fcSJan Kara #else 859957153fcSJan Kara static inline void ext4_quota_off_umount(struct super_block *sb) 860957153fcSJan Kara { 861957153fcSJan Kara } 862957153fcSJan Kara #endif 863957153fcSJan Kara 864617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 865ac27a0ecSDave Kleikamp { 866617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 867617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 86897abd7d4STheodore Ts'o int aborted = 0; 869ef2cabf7SHidehiro Kawai int i, err; 870ac27a0ecSDave Kleikamp 871857ac889SLukas Czerner ext4_unregister_li_request(sb); 872957153fcSJan Kara ext4_quota_off_umount(sb); 873e0ccfd95SChristoph Hellwig 8742e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 8752e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 8764c0425ffSMingming Cao 8770390131bSFrank Mayhar if (sbi->s_journal) { 87897abd7d4STheodore Ts'o aborted = is_journal_aborted(sbi->s_journal); 879ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 88047b4a50bSJan Kara sbi->s_journal = NULL; 88197abd7d4STheodore Ts'o if ((err < 0) && !aborted) 882c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 8830390131bSFrank Mayhar } 884d4edac31SJosef Bacik 885ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 886d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 8879105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 888d4edac31SJosef Bacik ext4_release_system_zone(sb); 889d4edac31SJosef Bacik ext4_mb_release(sb); 890d4edac31SJosef Bacik ext4_ext_release(sb); 891d4edac31SJosef Bacik 89297abd7d4STheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && !aborted) { 893e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 894ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 895ac27a0ecSDave Kleikamp } 89658c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 897a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 898a8e25a83SArtem Bityutskiy 899ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 900ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 901b93b41d4SAl Viro kvfree(sbi->s_group_desc); 902b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 90357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 904ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 905ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 90657042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 907c8585c6fSDaeho Jeong percpu_free_rwsem(&sbi->s_journal_flag_rwsem); 908ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 909a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 910ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 911ac27a0ecSDave Kleikamp #endif 912ac27a0ecSDave Kleikamp 913ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 914ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 915ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 916ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 917ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 918ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 919ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 920ac27a0ecSDave Kleikamp 92189d96a6fSTheodore Ts'o sync_blockdev(sb->s_bdev); 922f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 923ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 924ac27a0ecSDave Kleikamp /* 925ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 926ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 927ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 928ac27a0ecSDave Kleikamp */ 929ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 930f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 931617ba13bSMingming Cao ext4_blkdev_remove(sbi); 932ac27a0ecSDave Kleikamp } 9339c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 9349c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 9359c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 9369c191f70ST Makphaibulchoke } 937c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 938c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 9399060dd2cSEric Sandeen brelse(sbi->s_sbh); 940ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 9413197ebdbSTheodore Ts'o /* 9423197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 9433197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 9443197ebdbSTheodore Ts'o */ 9453197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 9463197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 9470441984aSDarrick J. Wong if (sbi->s_chksum_driver) 9480441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 949705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 950ac27a0ecSDave Kleikamp kfree(sbi); 951ac27a0ecSDave Kleikamp } 952ac27a0ecSDave Kleikamp 953e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 954ac27a0ecSDave Kleikamp 955ac27a0ecSDave Kleikamp /* 956ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 957ac27a0ecSDave Kleikamp */ 958617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 959ac27a0ecSDave Kleikamp { 960617ba13bSMingming Cao struct ext4_inode_info *ei; 961ac27a0ecSDave Kleikamp 962e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 963ac27a0ecSDave Kleikamp if (!ei) 964ac27a0ecSDave Kleikamp return NULL; 9650b8e58a1SAndreas Dilger 966ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 967202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 968c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 969c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 9709a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 9719a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 972edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 973eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 974edaa53caSZheng Liu ei->i_es_shk_nr = 0; 975dd475925SJan Kara ei->i_es_shrink_lblk = 0; 976d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 977d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 978d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 9799d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 9807e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 981d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 982a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 983a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 98496c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 985a9e7f447SDmitry Monakhov #endif 9868aefcd55STheodore Ts'o ei->jinode = NULL; 9872e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 988744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 989b436b9beSJan Kara ei->i_sync_tid = 0; 990b436b9beSJan Kara ei->i_datasync_tid = 0; 991e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9922e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 993ac27a0ecSDave Kleikamp return &ei->vfs_inode; 994ac27a0ecSDave Kleikamp } 995ac27a0ecSDave Kleikamp 9967ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9977ff9c073STheodore Ts'o { 9987ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9997ff9c073STheodore Ts'o 10007ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 10017ff9c073STheodore Ts'o return drop; 10027ff9c073STheodore Ts'o } 10037ff9c073STheodore Ts'o 1004fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 1005fa0d7e3dSNick Piggin { 1006fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 1007fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 1008fa0d7e3dSNick Piggin } 1009fa0d7e3dSNick Piggin 1010617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 1011ac27a0ecSDave Kleikamp { 10129f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 1013b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 1014b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 1015b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 10169f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 10179f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 10189f7dd93dSVasily Averin true); 10199f7dd93dSVasily Averin dump_stack(); 10209f7dd93dSVasily Averin } 1021fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 1022ac27a0ecSDave Kleikamp } 1023ac27a0ecSDave Kleikamp 102451cc5068SAlexey Dobriyan static void init_once(void *foo) 1025ac27a0ecSDave Kleikamp { 1026617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 1027ac27a0ecSDave Kleikamp 1028ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 1029ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 10300e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 1031ea3d7209SJan Kara init_rwsem(&ei->i_mmap_sem); 1032ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 1033ac27a0ecSDave Kleikamp } 1034ac27a0ecSDave Kleikamp 1035e67bc2b3SFabian Frederick static int __init init_inodecache(void) 1036ac27a0ecSDave Kleikamp { 1037617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 1038617ba13bSMingming Cao sizeof(struct ext4_inode_info), 1039ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 10405d097056SVladimir Davydov SLAB_MEM_SPREAD|SLAB_ACCOUNT), 104120c2df83SPaul Mundt init_once); 1042617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 1043ac27a0ecSDave Kleikamp return -ENOMEM; 1044ac27a0ecSDave Kleikamp return 0; 1045ac27a0ecSDave Kleikamp } 1046ac27a0ecSDave Kleikamp 1047ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 1048ac27a0ecSDave Kleikamp { 10498c0a8537SKirill A. Shutemov /* 10508c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 10518c0a8537SKirill A. Shutemov * destroy cache. 10528c0a8537SKirill A. Shutemov */ 10538c0a8537SKirill A. Shutemov rcu_barrier(); 1054617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 1055ac27a0ecSDave Kleikamp } 1056ac27a0ecSDave Kleikamp 10570930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 1058ac27a0ecSDave Kleikamp { 10590930fcc1SAl Viro invalidate_inode_buffers(inode); 1060dbd5768fSJan Kara clear_inode(inode); 10619f754758SChristoph Hellwig dquot_drop(inode); 1062c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 106351865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 10648aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 10658aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 10668aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 10678aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 10688aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 10698aefcd55STheodore Ts'o } 1070b7236e21STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 1071a7550b30SJaegeuk Kim fscrypt_put_encryption_info(inode, NULL); 1072b7236e21STheodore Ts'o #endif 1073ac27a0ecSDave Kleikamp } 1074ac27a0ecSDave Kleikamp 10751b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 10761b961ac0SChristoph Hellwig u64 ino, u32 generation) 1077ac27a0ecSDave Kleikamp { 1078ac27a0ecSDave Kleikamp struct inode *inode; 1079ac27a0ecSDave Kleikamp 1080617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1081ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1082617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1083ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1084ac27a0ecSDave Kleikamp 1085ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1086ac27a0ecSDave Kleikamp * 1087617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1088ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1089ac27a0ecSDave Kleikamp * 1090ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1091ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1092ac27a0ecSDave Kleikamp */ 1093f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 10941d1fe1eeSDavid Howells if (IS_ERR(inode)) 10951d1fe1eeSDavid Howells return ERR_CAST(inode); 10961d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1097ac27a0ecSDave Kleikamp iput(inode); 1098ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1099ac27a0ecSDave Kleikamp } 11001b961ac0SChristoph Hellwig 11011b961ac0SChristoph Hellwig return inode; 1102ac27a0ecSDave Kleikamp } 11031b961ac0SChristoph Hellwig 11041b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11051b961ac0SChristoph Hellwig int fh_len, int fh_type) 11061b961ac0SChristoph Hellwig { 11071b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11081b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11091b961ac0SChristoph Hellwig } 11101b961ac0SChristoph Hellwig 11111b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11121b961ac0SChristoph Hellwig int fh_len, int fh_type) 11131b961ac0SChristoph Hellwig { 11141b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11151b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1116ac27a0ecSDave Kleikamp } 1117ac27a0ecSDave Kleikamp 1118c39a7f84SToshiyuki Okajima /* 1119c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1120c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1121c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1122c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1123c39a7f84SToshiyuki Okajima */ 11240b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11250b8e58a1SAndreas Dilger gfp_t wait) 1126c39a7f84SToshiyuki Okajima { 1127c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1128c39a7f84SToshiyuki Okajima 1129c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1130c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1131c39a7f84SToshiyuki Okajima return 0; 1132c39a7f84SToshiyuki Okajima if (journal) 1133c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1134d0164adcSMel Gorman wait & ~__GFP_DIRECT_RECLAIM); 1135c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1136c39a7f84SToshiyuki Okajima } 1137c39a7f84SToshiyuki Okajima 1138a7550b30SJaegeuk Kim #ifdef CONFIG_EXT4_FS_ENCRYPTION 1139a7550b30SJaegeuk Kim static int ext4_get_context(struct inode *inode, void *ctx, size_t len) 1140a7550b30SJaegeuk Kim { 1141a7550b30SJaegeuk Kim return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION, 1142a7550b30SJaegeuk Kim EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, ctx, len); 1143a7550b30SJaegeuk Kim } 1144a7550b30SJaegeuk Kim 1145a7550b30SJaegeuk Kim static int ext4_prepare_context(struct inode *inode) 1146a7550b30SJaegeuk Kim { 1147a7550b30SJaegeuk Kim return ext4_convert_inline_data(inode); 1148a7550b30SJaegeuk Kim } 1149a7550b30SJaegeuk Kim 1150a7550b30SJaegeuk Kim static int ext4_set_context(struct inode *inode, const void *ctx, size_t len, 1151a7550b30SJaegeuk Kim void *fs_data) 1152a7550b30SJaegeuk Kim { 11532f8f5e76SEric Biggers handle_t *handle = fs_data; 11542f8f5e76SEric Biggers int res, res2, retries = 0; 1155a7550b30SJaegeuk Kim 11562f8f5e76SEric Biggers /* 11572f8f5e76SEric Biggers * If a journal handle was specified, then the encryption context is 11582f8f5e76SEric Biggers * being set on a new inode via inheritance and is part of a larger 11592f8f5e76SEric Biggers * transaction to create the inode. Otherwise the encryption context is 11602f8f5e76SEric Biggers * being set on an existing inode in its own transaction. Only in the 11612f8f5e76SEric Biggers * latter case should the "retry on ENOSPC" logic be used. 11622f8f5e76SEric Biggers */ 11632f8f5e76SEric Biggers 11642f8f5e76SEric Biggers if (handle) { 11652f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, 11662f8f5e76SEric Biggers EXT4_XATTR_INDEX_ENCRYPTION, 11672f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 11682f8f5e76SEric Biggers ctx, len, 0); 1169a7550b30SJaegeuk Kim if (!res) { 1170a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1171a7550b30SJaegeuk Kim ext4_clear_inode_state(inode, 1172a7550b30SJaegeuk Kim EXT4_STATE_MAY_INLINE_DATA); 1173a3caa24bSJan Kara /* 1174a3caa24bSJan Kara * Update inode->i_flags - e.g. S_DAX may get disabled 1175a3caa24bSJan Kara */ 1176a3caa24bSJan Kara ext4_set_inode_flags(inode); 1177a7550b30SJaegeuk Kim } 1178a7550b30SJaegeuk Kim return res; 1179a7550b30SJaegeuk Kim } 1180a7550b30SJaegeuk Kim 11812f8f5e76SEric Biggers retry: 1182a7550b30SJaegeuk Kim handle = ext4_journal_start(inode, EXT4_HT_MISC, 1183a7550b30SJaegeuk Kim ext4_jbd2_credits_xattr(inode)); 1184a7550b30SJaegeuk Kim if (IS_ERR(handle)) 1185a7550b30SJaegeuk Kim return PTR_ERR(handle); 1186a7550b30SJaegeuk Kim 11872f8f5e76SEric Biggers res = ext4_xattr_set_handle(handle, inode, EXT4_XATTR_INDEX_ENCRYPTION, 11882f8f5e76SEric Biggers EXT4_XATTR_NAME_ENCRYPTION_CONTEXT, 11892f8f5e76SEric Biggers ctx, len, 0); 1190a7550b30SJaegeuk Kim if (!res) { 1191a7550b30SJaegeuk Kim ext4_set_inode_flag(inode, EXT4_INODE_ENCRYPT); 1192a3caa24bSJan Kara /* Update inode->i_flags - e.g. S_DAX may get disabled */ 1193a3caa24bSJan Kara ext4_set_inode_flags(inode); 1194a7550b30SJaegeuk Kim res = ext4_mark_inode_dirty(handle, inode); 1195a7550b30SJaegeuk Kim if (res) 1196a7550b30SJaegeuk Kim EXT4_ERROR_INODE(inode, "Failed to mark inode dirty"); 1197a7550b30SJaegeuk Kim } 1198a7550b30SJaegeuk Kim res2 = ext4_journal_stop(handle); 11992f8f5e76SEric Biggers 12002f8f5e76SEric Biggers if (res == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries)) 12012f8f5e76SEric Biggers goto retry; 1202a7550b30SJaegeuk Kim if (!res) 1203a7550b30SJaegeuk Kim res = res2; 1204a7550b30SJaegeuk Kim return res; 1205a7550b30SJaegeuk Kim } 1206a7550b30SJaegeuk Kim 1207a7550b30SJaegeuk Kim static int ext4_dummy_context(struct inode *inode) 1208a7550b30SJaegeuk Kim { 1209a7550b30SJaegeuk Kim return DUMMY_ENCRYPTION_ENABLED(EXT4_SB(inode->i_sb)); 1210a7550b30SJaegeuk Kim } 1211a7550b30SJaegeuk Kim 1212a7550b30SJaegeuk Kim static unsigned ext4_max_namelen(struct inode *inode) 1213a7550b30SJaegeuk Kim { 1214a7550b30SJaegeuk Kim return S_ISLNK(inode->i_mode) ? inode->i_sb->s_blocksize : 1215a7550b30SJaegeuk Kim EXT4_NAME_LEN; 1216a7550b30SJaegeuk Kim } 1217a7550b30SJaegeuk Kim 12186f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1219a5d431efSEric Biggers .key_prefix = "ext4:", 1220a7550b30SJaegeuk Kim .get_context = ext4_get_context, 1221a7550b30SJaegeuk Kim .prepare_context = ext4_prepare_context, 1222a7550b30SJaegeuk Kim .set_context = ext4_set_context, 1223a7550b30SJaegeuk Kim .dummy_context = ext4_dummy_context, 1224a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1225a7550b30SJaegeuk Kim .empty_dir = ext4_empty_dir, 1226a7550b30SJaegeuk Kim .max_namelen = ext4_max_namelen, 1227a7550b30SJaegeuk Kim }; 1228a7550b30SJaegeuk Kim #else 12296f69f0edSEric Biggers static const struct fscrypt_operations ext4_cryptops = { 1230a7550b30SJaegeuk Kim .is_encrypted = ext4_encrypted_inode, 1231a7550b30SJaegeuk Kim }; 1232a7550b30SJaegeuk Kim #endif 1233a7550b30SJaegeuk Kim 1234ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1235689c958cSLi Xi static char *quotatypes[] = INITQFNAMES; 1236689c958cSLi Xi #define QTYPE2NAME(t) (quotatypes[t]) 1237ac27a0ecSDave Kleikamp 1238617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1239617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1240617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1241617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1242617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 12436f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 12448c54ca9cSAl Viro const struct path *path); 1245617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1246617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1247ac27a0ecSDave Kleikamp size_t len, loff_t off); 1248617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1249ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 12507c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 12517c319d32SAditya Kali unsigned int flags); 12527c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 12538f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid); 1254ac27a0ecSDave Kleikamp 125596c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 125696c7e0d9SJan Kara { 125796c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 125896c7e0d9SJan Kara } 125996c7e0d9SJan Kara 126061e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 126160e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1262617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1263617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1264617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1265617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1266a5b5ee32SJan Kara .write_info = ext4_write_info, 1267a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1268a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1269040cb378SLi Xi .get_projid = ext4_get_projid, 12708f0e8746STheodore Ts'o .get_next_id = ext4_get_next_id, 1271ac27a0ecSDave Kleikamp }; 1272ac27a0ecSDave Kleikamp 12730d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1274617ba13bSMingming Cao .quota_on = ext4_quota_on, 1275ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1276287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 12770a240339SJan Kara .get_state = dquot_get_state, 1278287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1279287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 12806332b9b5SEric Sandeen .set_dqblk = dquot_set_dqblk, 12816332b9b5SEric Sandeen .get_nextdqblk = dquot_get_next_dqblk, 1282ac27a0ecSDave Kleikamp }; 1283ac27a0ecSDave Kleikamp #endif 1284ac27a0ecSDave Kleikamp 1285ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1286617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1287617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1288617ba13bSMingming Cao .write_inode = ext4_write_inode, 1289617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 12907ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12910930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1292617ba13bSMingming Cao .put_super = ext4_put_super, 1293617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1294c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1295c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1296617ba13bSMingming Cao .statfs = ext4_statfs, 1297617ba13bSMingming Cao .remount_fs = ext4_remount, 1298617ba13bSMingming Cao .show_options = ext4_show_options, 1299ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1300617ba13bSMingming Cao .quota_read = ext4_quota_read, 1301617ba13bSMingming Cao .quota_write = ext4_quota_write, 130296c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1303ac27a0ecSDave Kleikamp #endif 1304c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1305ac27a0ecSDave Kleikamp }; 1306ac27a0ecSDave Kleikamp 130739655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 13081b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 13091b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1310617ba13bSMingming Cao .get_parent = ext4_get_parent, 1311ac27a0ecSDave Kleikamp }; 1312ac27a0ecSDave Kleikamp 1313ac27a0ecSDave Kleikamp enum { 1314ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1315ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 131672578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1317ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 131872578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1319ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1320ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1321ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 13226ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1323ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 13245a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1325ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 132649da9392SJan Kara Opt_usrquota, Opt_grpquota, Opt_prjquota, Opt_i_version, Opt_dax, 13271449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1328670e9875STheodore Ts'o Opt_lazytime, Opt_nolazytime, Opt_debug_want_extra_isize, 13291449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 13305328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1331744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1332fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1333c6d3d56dSDarrick J. Wong Opt_max_dir_size_kb, Opt_nojournal_checksum, 1334ac27a0ecSDave Kleikamp }; 1335ac27a0ecSDave Kleikamp 1336a447c093SSteven Whitehouse static const match_table_t tokens = { 1337ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1338ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1339ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1340ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1341ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1342ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1343ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1344ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1345ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1346ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1347ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1348ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1349ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1350ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 135172578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 135272578c33STheodore Ts'o {Opt_removed, "orlov"}, 1353ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1354ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1355ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1356ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1357e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 13585a916be1STheodore Ts'o {Opt_noload, "noload"}, 135972578c33STheodore Ts'o {Opt_removed, "nobh"}, 136072578c33STheodore Ts'o {Opt_removed, "bh"}, 1361ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 136230773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 136330773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1364ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1365ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1366818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1367c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1368818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1369ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1370ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1371ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1372ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13735bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13745bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1375ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1376ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1377ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1378ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1379ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1380ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13815a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1382ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1383ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1384ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1385ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 138649da9392SJan Kara {Opt_prjquota, "prjquota"}, 1387ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 138806705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 138906705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 139025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1391923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1392c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 139364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1394a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1395a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1396670e9875STheodore Ts'o {Opt_debug_want_extra_isize, "debug_want_extra_isize=%u"}, 1397dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 139836ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 139936ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 14006fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 14016fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1402240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1403b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1404afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 140506705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 140606705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1407744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1408744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 14095328e635SEric Sandeen {Opt_discard, "discard"}, 14105328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1411fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1412fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1413fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1414df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 14156ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1416c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1417c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1418c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1419c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1420c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1421f3f12faaSJosef Bacik {Opt_err, NULL}, 1422ac27a0ecSDave Kleikamp }; 1423ac27a0ecSDave Kleikamp 1424617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1425ac27a0ecSDave Kleikamp { 1426617ba13bSMingming Cao ext4_fsblk_t sb_block; 1427ac27a0ecSDave Kleikamp char *options = (char *) *data; 1428ac27a0ecSDave Kleikamp 1429ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1430ac27a0ecSDave Kleikamp return 1; /* Default location */ 14310b8e58a1SAndreas Dilger 1432ac27a0ecSDave Kleikamp options += 3; 14330b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1434ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1435ac27a0ecSDave Kleikamp if (*options && *options != ',') { 14364776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1437ac27a0ecSDave Kleikamp (char *) *data); 1438ac27a0ecSDave Kleikamp return 1; 1439ac27a0ecSDave Kleikamp } 1440ac27a0ecSDave Kleikamp if (*options == ',') 1441ac27a0ecSDave Kleikamp options++; 1442ac27a0ecSDave Kleikamp *data = (void *) options; 14430b8e58a1SAndreas Dilger 1444ac27a0ecSDave Kleikamp return sb_block; 1445ac27a0ecSDave Kleikamp } 1446ac27a0ecSDave Kleikamp 1447b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1448437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1449437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1450b3881f74STheodore Ts'o 145156c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 145256c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 145356c50f11SDmitry Monakhov { 145456c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 145556c50f11SDmitry Monakhov char *qname; 145603dafb5fSChen Gang int ret = -1; 145756c50f11SDmitry Monakhov 145856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 145956c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 146056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 146156c50f11SDmitry Monakhov "Cannot change journaled " 146256c50f11SDmitry Monakhov "quota options when quota turned on"); 146357f73c2cSTheodore Ts'o return -1; 146456c50f11SDmitry Monakhov } 1465e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1466c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, "Journaled quota options " 1467c325a67cSTheodore Ts'o "ignored when QUOTA feature is enabled"); 1468c325a67cSTheodore Ts'o return 1; 1469262b4662SJan Kara } 147056c50f11SDmitry Monakhov qname = match_strdup(args); 147156c50f11SDmitry Monakhov if (!qname) { 147256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 147356c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 147457f73c2cSTheodore Ts'o return -1; 147556c50f11SDmitry Monakhov } 147603dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 147703dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 147803dafb5fSChen Gang ret = 1; 147903dafb5fSChen Gang else 148056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 148103dafb5fSChen Gang "%s quota file already specified", 148203dafb5fSChen Gang QTYPE2NAME(qtype)); 148303dafb5fSChen Gang goto errout; 148456c50f11SDmitry Monakhov } 148503dafb5fSChen Gang if (strchr(qname, '/')) { 148656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 148756c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 148803dafb5fSChen Gang goto errout; 148956c50f11SDmitry Monakhov } 149003dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1491fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 149256c50f11SDmitry Monakhov return 1; 149303dafb5fSChen Gang errout: 149403dafb5fSChen Gang kfree(qname); 149503dafb5fSChen Gang return ret; 149656c50f11SDmitry Monakhov } 149756c50f11SDmitry Monakhov 149856c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 149956c50f11SDmitry Monakhov { 150056c50f11SDmitry Monakhov 150156c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 150256c50f11SDmitry Monakhov 150356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 150456c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 150556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 150656c50f11SDmitry Monakhov " when quota turned on"); 150757f73c2cSTheodore Ts'o return -1; 150856c50f11SDmitry Monakhov } 150903dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 151056c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 151156c50f11SDmitry Monakhov return 1; 151256c50f11SDmitry Monakhov } 151356c50f11SDmitry Monakhov #endif 151456c50f11SDmitry Monakhov 151526092bf5STheodore Ts'o #define MOPT_SET 0x0001 151626092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 151726092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 151826092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 151926092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 152026092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 152126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 152226092bf5STheodore Ts'o #define MOPT_Q 0 152326092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 152426092bf5STheodore Ts'o #else 152526092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 152626092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 152726092bf5STheodore Ts'o #endif 152826092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 15298dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 15308dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 15318dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1532ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 153326092bf5STheodore Ts'o 153426092bf5STheodore Ts'o static const struct mount_opts { 153526092bf5STheodore Ts'o int token; 153626092bf5STheodore Ts'o int mount_opt; 153726092bf5STheodore Ts'o int flags; 153826092bf5STheodore Ts'o } ext4_mount_opts[] = { 153926092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 154026092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 154126092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 154226092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 154326092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 154426092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 15458dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 15468dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 15478dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 15488dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 154926092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 155026092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 15518dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 15528dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15538dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 155459d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1555c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1556c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 15578dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 15581e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 155926092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 15608dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 15611e381f60SDmitry Monakhov MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 15628dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 156326092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 156426092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 156526092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 15668dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 15677915a861SAles Novak MOPT_NO_EXT2}, 15688dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 15697915a861SAles Novak MOPT_NO_EXT2}, 157026092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 157126092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 157226092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 157326092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 157426092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 157526092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 157626092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 157726092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 157826092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 157926092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1580923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 158126092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 15820efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 15830efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 15845ba92bcfSCarlos Maiolino {Opt_journal_dev, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 15855ba92bcfSCarlos Maiolino {Opt_journal_path, 0, MOPT_NO_EXT2 | MOPT_STRING}, 15865ba92bcfSCarlos Maiolino {Opt_journal_ioprio, 0, MOPT_NO_EXT2 | MOPT_GTE0}, 15878dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 15888dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 15898dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 15908dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 159126092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 159226092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 159326092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 159426092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 159526092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 159626092bf5STheodore Ts'o #else 159726092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 159826092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 159926092bf5STheodore Ts'o #endif 160026092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 160126092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 1602670e9875STheodore Ts'o {Opt_debug_want_extra_isize, 0, MOPT_GTE0}, 160326092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 160426092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 160526092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 160626092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 160726092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 160849da9392SJan Kara {Opt_prjquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_PRJQUOTA, 160949da9392SJan Kara MOPT_SET | MOPT_Q}, 161026092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 161149da9392SJan Kara EXT4_MOUNT_GRPQUOTA | EXT4_MOUNT_PRJQUOTA), 161249da9392SJan Kara MOPT_CLEAR | MOPT_Q}, 161326092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 161426092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 161526092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 161626092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 161726092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 161826092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 161926092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1620df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 16216ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 162226092bf5STheodore Ts'o {Opt_err, 0, 0} 162326092bf5STheodore Ts'o }; 162426092bf5STheodore Ts'o 162526092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 162626092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 162726092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 162826092bf5STheodore Ts'o { 162926092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 163026092bf5STheodore Ts'o const struct mount_opts *m; 163108cefc7aSEric W. Biederman kuid_t uid; 163208cefc7aSEric W. Biederman kgid_t gid; 163326092bf5STheodore Ts'o int arg = 0; 163426092bf5STheodore Ts'o 163557f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 163657f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 163757f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 163857f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 163957f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 164057f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 164157f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 164257f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 164357f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 164457f73c2cSTheodore Ts'o #endif 164526092bf5STheodore Ts'o switch (token) { 1646f7048605STheodore Ts'o case Opt_noacl: 1647f7048605STheodore Ts'o case Opt_nouser_xattr: 1648f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1649f7048605STheodore Ts'o break; 165026092bf5STheodore Ts'o case Opt_sb: 165126092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 165226092bf5STheodore Ts'o case Opt_removed: 16535f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 165426092bf5STheodore Ts'o return 1; 165526092bf5STheodore Ts'o case Opt_abort: 165626092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 165726092bf5STheodore Ts'o return 1; 165826092bf5STheodore Ts'o case Opt_i_version: 165926092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 166026092bf5STheodore Ts'o return 1; 1661a26f4992STheodore Ts'o case Opt_lazytime: 1662a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1663a26f4992STheodore Ts'o return 1; 1664a26f4992STheodore Ts'o case Opt_nolazytime: 1665a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1666a26f4992STheodore Ts'o return 1; 166726092bf5STheodore Ts'o } 166826092bf5STheodore Ts'o 16695f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 16705f3633e3SJan Kara if (token == m->token) 16715f3633e3SJan Kara break; 16725f3633e3SJan Kara 16735f3633e3SJan Kara if (m->token == Opt_err) { 16745f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 16755f3633e3SJan Kara "or missing value", opt); 16765f3633e3SJan Kara return -1; 16775f3633e3SJan Kara } 16785f3633e3SJan Kara 16798dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 16808dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 16818dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 16828dc0aa8cSTheodore Ts'o return -1; 16838dc0aa8cSTheodore Ts'o } 16848dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 16858dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 16868dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 16878dc0aa8cSTheodore Ts'o return -1; 16888dc0aa8cSTheodore Ts'o } 16898dc0aa8cSTheodore Ts'o 1690ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 16910efb3b23SJan Kara return -1; 169226092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 169326092bf5STheodore Ts'o return -1; 1694c93cf2d7SDmitry Monakhov if (m->flags & MOPT_EXPLICIT) { 1695c93cf2d7SDmitry Monakhov if (m->mount_opt & EXT4_MOUNT_DELALLOC) { 169626092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 16971e381f60SDmitry Monakhov } else if (m->mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) { 16981e381f60SDmitry Monakhov set_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM); 1699c93cf2d7SDmitry Monakhov } else 1700c93cf2d7SDmitry Monakhov return -1; 1701c93cf2d7SDmitry Monakhov } 170226092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 170326092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 170426092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 170526092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 170626092bf5STheodore Ts'o "options when quota turned on"); 170726092bf5STheodore Ts'o return -1; 170826092bf5STheodore Ts'o } 170926092bf5STheodore Ts'o 171026092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 171126092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 171226092bf5STheodore Ts'o } else if (token == Opt_commit) { 171326092bf5STheodore Ts'o if (arg == 0) 171426092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 171526092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 1716670e9875STheodore Ts'o } else if (token == Opt_debug_want_extra_isize) { 1717670e9875STheodore Ts'o sbi->s_want_extra_isize = arg; 171826092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 171926092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 172026092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 172126092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 172226092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1723e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1724e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1725e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1726e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 172726092bf5STheodore Ts'o return -1; 172826092bf5STheodore Ts'o } 172926092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 173026092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 173126092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 173226092bf5STheodore Ts'o if (!args->from) 173326092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 173426092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1735df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1736df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 173726092bf5STheodore Ts'o } else if (token == Opt_stripe) { 173826092bf5STheodore Ts'o sbi->s_stripe = arg; 17390efb3b23SJan Kara } else if (token == Opt_resuid) { 17400efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 17410efb3b23SJan Kara if (!uid_valid(uid)) { 17425f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 17430efb3b23SJan Kara return -1; 17440efb3b23SJan Kara } 17450efb3b23SJan Kara sbi->s_resuid = uid; 17460efb3b23SJan Kara } else if (token == Opt_resgid) { 17470efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 17480efb3b23SJan Kara if (!gid_valid(gid)) { 17495f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 17500efb3b23SJan Kara return -1; 17510efb3b23SJan Kara } 17520efb3b23SJan Kara sbi->s_resgid = gid; 17530efb3b23SJan Kara } else if (token == Opt_journal_dev) { 17540efb3b23SJan Kara if (is_remount) { 17550efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 17560efb3b23SJan Kara "Cannot specify journal on remount"); 17570efb3b23SJan Kara return -1; 17580efb3b23SJan Kara } 17590efb3b23SJan Kara *journal_devnum = arg; 1760ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1761ad4eec61SEric Sandeen char *journal_path; 1762ad4eec61SEric Sandeen struct inode *journal_inode; 1763ad4eec61SEric Sandeen struct path path; 1764ad4eec61SEric Sandeen int error; 1765ad4eec61SEric Sandeen 1766ad4eec61SEric Sandeen if (is_remount) { 1767ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1768ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1769ad4eec61SEric Sandeen return -1; 1770ad4eec61SEric Sandeen } 1771ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1772ad4eec61SEric Sandeen if (!journal_path) { 1773ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1774ad4eec61SEric Sandeen "journal device string"); 1775ad4eec61SEric Sandeen return -1; 1776ad4eec61SEric Sandeen } 1777ad4eec61SEric Sandeen 1778ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1779ad4eec61SEric Sandeen if (error) { 1780ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1781ad4eec61SEric Sandeen "journal device path: error %d", error); 1782ad4eec61SEric Sandeen kfree(journal_path); 1783ad4eec61SEric Sandeen return -1; 1784ad4eec61SEric Sandeen } 1785ad4eec61SEric Sandeen 17862b0143b5SDavid Howells journal_inode = d_inode(path.dentry); 1787ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1788ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1789ad4eec61SEric Sandeen "is not a block device", journal_path); 1790ad4eec61SEric Sandeen path_put(&path); 1791ad4eec61SEric Sandeen kfree(journal_path); 1792ad4eec61SEric Sandeen return -1; 1793ad4eec61SEric Sandeen } 1794ad4eec61SEric Sandeen 1795ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1796ad4eec61SEric Sandeen path_put(&path); 1797ad4eec61SEric Sandeen kfree(journal_path); 17980efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 17990efb3b23SJan Kara if (arg > 7) { 18005f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 18010efb3b23SJan Kara " (must be 0-7)"); 18020efb3b23SJan Kara return -1; 18030efb3b23SJan Kara } 18040efb3b23SJan Kara *journal_ioprio = 18050efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 18066ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 18076ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 18086ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 18096ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18106ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 18116ddb2447STheodore Ts'o #else 18126ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 18136ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 18146ddb2447STheodore Ts'o #endif 181526092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 181626092bf5STheodore Ts'o if (is_remount) { 181726092bf5STheodore Ts'o if (!sbi->s_journal) 181826092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 18195f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 182026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 182126092bf5STheodore Ts'o "Cannot change data mode on remount"); 182226092bf5STheodore Ts'o return -1; 182326092bf5STheodore Ts'o } 182426092bf5STheodore Ts'o } else { 182526092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 182626092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 182726092bf5STheodore Ts'o } 182826092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 182926092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 183026092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 183126092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 18325f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 18335f3633e3SJan Kara "quota options when quota turned on"); 183426092bf5STheodore Ts'o return -1; 183526092bf5STheodore Ts'o } 1836e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) { 1837c325a67cSTheodore Ts'o ext4_msg(sb, KERN_INFO, 1838c325a67cSTheodore Ts'o "Quota format mount options ignored " 1839262b4662SJan Kara "when QUOTA feature is enabled"); 1840c325a67cSTheodore Ts'o return 1; 1841262b4662SJan Kara } 184226092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 184326092bf5STheodore Ts'o #endif 1844923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1845ef83b6e8SDan Williams #ifdef CONFIG_FS_DAX 1846ef83b6e8SDan Williams ext4_msg(sb, KERN_WARNING, 1847ef83b6e8SDan Williams "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); 1848ef83b6e8SDan Williams sbi->s_mount_opt |= m->mount_opt; 1849ef83b6e8SDan Williams #else 1850923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1851923ae0ffSRoss Zwisler return -1; 1852923ae0ffSRoss Zwisler #endif 18537915a861SAles Novak } else if (token == Opt_data_err_abort) { 18547915a861SAles Novak sbi->s_mount_opt |= m->mount_opt; 18557915a861SAles Novak } else if (token == Opt_data_err_ignore) { 18567915a861SAles Novak sbi->s_mount_opt &= ~m->mount_opt; 185726092bf5STheodore Ts'o } else { 185826092bf5STheodore Ts'o if (!args->from) 185926092bf5STheodore Ts'o arg = 1; 186026092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 186126092bf5STheodore Ts'o arg = !arg; 186226092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 186326092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 186426092bf5STheodore Ts'o "buggy handling of option %s", opt); 186526092bf5STheodore Ts'o WARN_ON(1); 186626092bf5STheodore Ts'o return -1; 186726092bf5STheodore Ts'o } 186826092bf5STheodore Ts'o if (arg != 0) 186926092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 187026092bf5STheodore Ts'o else 187126092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 187226092bf5STheodore Ts'o } 187326092bf5STheodore Ts'o return 1; 187426092bf5STheodore Ts'o } 187526092bf5STheodore Ts'o 1876ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1877c3191067STheodore Ts'o unsigned long *journal_devnum, 1878b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1879661aa520SEric Sandeen int is_remount) 1880ac27a0ecSDave Kleikamp { 1881617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1882ac27a0ecSDave Kleikamp char *p; 1883ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 188426092bf5STheodore Ts'o int token; 1885ac27a0ecSDave Kleikamp 1886ac27a0ecSDave Kleikamp if (!options) 1887ac27a0ecSDave Kleikamp return 1; 1888ac27a0ecSDave Kleikamp 1889ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1890ac27a0ecSDave Kleikamp if (!*p) 1891ac27a0ecSDave Kleikamp continue; 189215121c18SEric Sandeen /* 189315121c18SEric Sandeen * Initialize args struct so we know whether arg was 189415121c18SEric Sandeen * found; some options take optional arguments. 189515121c18SEric Sandeen */ 1896caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1897ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 189826092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 189926092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1900ac27a0ecSDave Kleikamp return 0; 1901ac27a0ecSDave Kleikamp } 1902ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 190349da9392SJan Kara /* 190449da9392SJan Kara * We do the test below only for project quotas. 'usrquota' and 190549da9392SJan Kara * 'grpquota' mount options are allowed even without quota feature 190649da9392SJan Kara * to support legacy quotas in quota files. 190749da9392SJan Kara */ 190849da9392SJan Kara if (test_opt(sb, PRJQUOTA) && !ext4_has_feature_project(sb)) { 190949da9392SJan Kara ext4_msg(sb, KERN_ERR, "Project quota feature not enabled. " 191049da9392SJan Kara "Cannot enable project quota enforcement."); 191149da9392SJan Kara return 0; 191249da9392SJan Kara } 191349da9392SJan Kara if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1914482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1915fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1916ac27a0ecSDave Kleikamp 1917482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1918fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1919ac27a0ecSDave Kleikamp 192056c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1921b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1922b31e1552SEric Sandeen "format mixing"); 1923ac27a0ecSDave Kleikamp return 0; 1924ac27a0ecSDave Kleikamp } 1925ac27a0ecSDave Kleikamp 1926ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1927b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1928b31e1552SEric Sandeen "not specified"); 1929ac27a0ecSDave Kleikamp return 0; 1930ac27a0ecSDave Kleikamp } 1931ac27a0ecSDave Kleikamp } 1932ac27a0ecSDave Kleikamp #endif 1933261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1934261cb20cSJan Kara int blocksize = 1935261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1936261cb20cSJan Kara 193709cbfeafSKirill A. Shutemov if (blocksize < PAGE_SIZE) { 1938261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1939261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1940261cb20cSJan Kara return 0; 1941261cb20cSJan Kara } 1942261cb20cSJan Kara } 1943ac27a0ecSDave Kleikamp return 1; 1944ac27a0ecSDave Kleikamp } 1945ac27a0ecSDave Kleikamp 19462adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 19472adf6da8STheodore Ts'o struct super_block *sb) 19482adf6da8STheodore Ts'o { 19492adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 19502adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 19512adf6da8STheodore Ts'o 19522adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 19532adf6da8STheodore Ts'o char *fmtname = ""; 19542adf6da8STheodore Ts'o 19552adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 19562adf6da8STheodore Ts'o case QFMT_VFS_OLD: 19572adf6da8STheodore Ts'o fmtname = "vfsold"; 19582adf6da8STheodore Ts'o break; 19592adf6da8STheodore Ts'o case QFMT_VFS_V0: 19602adf6da8STheodore Ts'o fmtname = "vfsv0"; 19612adf6da8STheodore Ts'o break; 19622adf6da8STheodore Ts'o case QFMT_VFS_V1: 19632adf6da8STheodore Ts'o fmtname = "vfsv1"; 19642adf6da8STheodore Ts'o break; 19652adf6da8STheodore Ts'o } 19662adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 19672adf6da8STheodore Ts'o } 19682adf6da8STheodore Ts'o 19692adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 1970a068acf2SKees Cook seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]); 19712adf6da8STheodore Ts'o 19722adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 1973a068acf2SKees Cook seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]); 19742adf6da8STheodore Ts'o #endif 19752adf6da8STheodore Ts'o } 19762adf6da8STheodore Ts'o 19775a916be1STheodore Ts'o static const char *token2str(int token) 19785a916be1STheodore Ts'o { 197950df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 19805a916be1STheodore Ts'o 19815a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 19825a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 19835a916be1STheodore Ts'o break; 19845a916be1STheodore Ts'o return t->pattern; 19855a916be1STheodore Ts'o } 19865a916be1STheodore Ts'o 19872adf6da8STheodore Ts'o /* 19882adf6da8STheodore Ts'o * Show an option if 19892adf6da8STheodore Ts'o * - it's set to a non-default value OR 19902adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 19912adf6da8STheodore Ts'o */ 199266acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 199366acdcf4STheodore Ts'o int nodefs) 19942adf6da8STheodore Ts'o { 19952adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 19962adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 199766acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 19985a916be1STheodore Ts'o const struct mount_opts *m; 199966acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 20002adf6da8STheodore Ts'o 200166acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 200266acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 20032adf6da8STheodore Ts'o 20042adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 20055a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 20065a916be1STheodore Ts'o 20075a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 20085a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 20095a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 20105a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 20115a916be1STheodore Ts'o continue; 201266acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 20135a916be1STheodore Ts'o continue; /* skip if same as the default */ 20145a916be1STheodore Ts'o if ((want_set && 20155a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 20165a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 20175a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 20185a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 20195a916be1STheodore Ts'o } 20205a916be1STheodore Ts'o 202108cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 20225a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 202308cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 202408cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 202508cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 20265a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 202708cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 202808cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 202966acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 20305a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 20315a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 20322adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 20335a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 20342adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 20355a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 203666acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 20375a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 203866acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 20395a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 204066acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 20415a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 20422adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 20435a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 204466acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 20455a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 204666acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 20472adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 20485a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 20492adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 20505a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 20512adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 20525a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 20535a916be1STheodore Ts'o } 205466acdcf4STheodore Ts'o if (nodefs || 205566acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 20565a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 20572adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 20582adf6da8STheodore Ts'o 205966acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 206066acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 20615a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 2062df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 2063df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 20647915a861SAles Novak if (test_opt(sb, DATA_ERR_ABORT)) 20657915a861SAles Novak SEQ_OPTS_PUTS("data_err=abort"); 20662adf6da8STheodore Ts'o 20672adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 20682adf6da8STheodore Ts'o return 0; 20692adf6da8STheodore Ts'o } 20702adf6da8STheodore Ts'o 207166acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 207266acdcf4STheodore Ts'o { 207366acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 207466acdcf4STheodore Ts'o } 207566acdcf4STheodore Ts'o 2076ebd173beSTheodore Ts'o int ext4_seq_options_show(struct seq_file *seq, void *offset) 207766acdcf4STheodore Ts'o { 207866acdcf4STheodore Ts'o struct super_block *sb = seq->private; 207966acdcf4STheodore Ts'o int rc; 208066acdcf4STheodore Ts'o 208166acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 208266acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 208366acdcf4STheodore Ts'o seq_puts(seq, "\n"); 208466acdcf4STheodore Ts'o return rc; 208566acdcf4STheodore Ts'o } 208666acdcf4STheodore Ts'o 2087617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 2088ac27a0ecSDave Kleikamp int read_only) 2089ac27a0ecSDave Kleikamp { 2090617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2091ac27a0ecSDave Kleikamp int res = 0; 2092ac27a0ecSDave Kleikamp 2093617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 2094b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 2095b31e1552SEric Sandeen "forcing read-only mode"); 2096ac27a0ecSDave Kleikamp res = MS_RDONLY; 2097ac27a0ecSDave Kleikamp } 2098ac27a0ecSDave Kleikamp if (read_only) 2099281b5995STheodore Ts'o goto done; 2100617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 2101b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 2102b31e1552SEric Sandeen "running e2fsck is recommended"); 2103c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 2104b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2105b31e1552SEric Sandeen "warning: mounting fs with errors, " 2106b31e1552SEric Sandeen "running e2fsck is recommended"); 2107ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 2108ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 2109ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 2110b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2111b31e1552SEric Sandeen "warning: maximal mount count reached, " 2112b31e1552SEric Sandeen "running e2fsck is recommended"); 2113ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 2114ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 2115ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 2116b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2117b31e1552SEric Sandeen "warning: checktime reached, " 2118b31e1552SEric Sandeen "running e2fsck is recommended"); 21190390131bSFrank Mayhar if (!sbi->s_journal) 2120216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 2121ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 2122617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 2123e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 2124ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 2125617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 21260390131bSFrank Mayhar if (sbi->s_journal) 2127e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 2128ac27a0ecSDave Kleikamp 2129e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2130281b5995STheodore Ts'o done: 2131ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 2132a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 2133a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 2134ac27a0ecSDave Kleikamp sb->s_blocksize, 2135ac27a0ecSDave Kleikamp sbi->s_groups_count, 2136617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 2137617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 2138a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 2139ac27a0ecSDave Kleikamp 21407abc52c2SDan Magenheimer cleancache_init_fs(sb); 2141ac27a0ecSDave Kleikamp return res; 2142ac27a0ecSDave Kleikamp } 2143ac27a0ecSDave Kleikamp 2144117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 2145117fff10STheodore Ts'o { 2146117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 2147117fff10STheodore Ts'o struct flex_groups *new_groups; 2148117fff10STheodore Ts'o int size; 2149117fff10STheodore Ts'o 2150117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 2151117fff10STheodore Ts'o return 0; 2152117fff10STheodore Ts'o 2153117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 2154117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 2155117fff10STheodore Ts'o return 0; 2156117fff10STheodore Ts'o 2157117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 2158117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 2159117fff10STheodore Ts'o if (!new_groups) { 2160117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 2161117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 2162117fff10STheodore Ts'o return -ENOMEM; 2163117fff10STheodore Ts'o } 2164117fff10STheodore Ts'o 2165117fff10STheodore Ts'o if (sbi->s_flex_groups) { 2166117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 2167117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 2168117fff10STheodore Ts'o sizeof(struct flex_groups))); 2169b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 2170117fff10STheodore Ts'o } 2171117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 2172117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 2173117fff10STheodore Ts'o return 0; 2174117fff10STheodore Ts'o } 2175117fff10STheodore Ts'o 2176772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 2177772cb7c8SJose R. Santos { 2178772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 2179772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 2180772cb7c8SJose R. Santos ext4_group_t flex_group; 2181117fff10STheodore Ts'o int i, err; 2182772cb7c8SJose R. Santos 2183503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 2184d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 2185772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 2186772cb7c8SJose R. Santos return 1; 2187772cb7c8SJose R. Santos } 2188772cb7c8SJose R. Santos 2189117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 2190117fff10STheodore Ts'o if (err) 2191772cb7c8SJose R. Santos goto failed; 2192772cb7c8SJose R. Santos 2193772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 219488b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 2195772cb7c8SJose R. Santos 2196772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 21977ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 21987ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 219990ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 220024aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 22017ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 22027ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2203772cb7c8SJose R. Santos } 2204772cb7c8SJose R. Santos 2205772cb7c8SJose R. Santos return 1; 2206772cb7c8SJose R. Santos failed: 2207772cb7c8SJose R. Santos return 0; 2208772cb7c8SJose R. Santos } 2209772cb7c8SJose R. Santos 2210e2b911c5SDarrick J. Wong static __le16 ext4_group_desc_csum(struct super_block *sb, __u32 block_group, 2211717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2212717d50e4SAndreas Dilger { 2213b47820edSDaeho Jeong int offset = offsetof(struct ext4_group_desc, bg_checksum); 2214717d50e4SAndreas Dilger __u16 crc = 0; 2215717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2216e2b911c5SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 2217717d50e4SAndreas Dilger 22189aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 2219feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2220feb0ab32SDarrick J. Wong __u32 csum32; 2221b47820edSDaeho Jeong __u16 dummy_csum = 0; 2222feb0ab32SDarrick J. Wong 2223feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2224feb0ab32SDarrick J. Wong sizeof(le_group)); 2225b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, offset); 2226b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)&dummy_csum, 2227b47820edSDaeho Jeong sizeof(dummy_csum)); 2228b47820edSDaeho Jeong offset += sizeof(dummy_csum); 2229b47820edSDaeho Jeong if (offset < sbi->s_desc_size) 2230b47820edSDaeho Jeong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp + offset, 2231b47820edSDaeho Jeong sbi->s_desc_size - offset); 2232feb0ab32SDarrick J. Wong 2233feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2234feb0ab32SDarrick J. Wong goto out; 2235feb0ab32SDarrick J. Wong } 2236feb0ab32SDarrick J. Wong 2237feb0ab32SDarrick J. Wong /* old crc16 code */ 2238e2b911c5SDarrick J. Wong if (!ext4_has_feature_gdt_csum(sb)) 2239813d32f9SDarrick J. Wong return 0; 2240813d32f9SDarrick J. Wong 2241717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2242717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2243717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2244717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2245717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2246e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 2247717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2248717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2249717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2250717d50e4SAndreas Dilger offset); 2251717d50e4SAndreas Dilger 2252feb0ab32SDarrick J. Wong out: 2253717d50e4SAndreas Dilger return cpu_to_le16(crc); 2254717d50e4SAndreas Dilger } 2255717d50e4SAndreas Dilger 2256feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2257717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2258717d50e4SAndreas Dilger { 2259feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2260e2b911c5SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(sb, block_group, gdp))) 2261717d50e4SAndreas Dilger return 0; 2262717d50e4SAndreas Dilger 2263717d50e4SAndreas Dilger return 1; 2264717d50e4SAndreas Dilger } 2265717d50e4SAndreas Dilger 2266feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2267feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2268feb0ab32SDarrick J. Wong { 2269feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2270feb0ab32SDarrick J. Wong return; 2271e2b911c5SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(sb, block_group, gdp); 2272feb0ab32SDarrick J. Wong } 2273feb0ab32SDarrick J. Wong 2274ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2275bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2276829fa70dSTheodore Ts'o ext4_fsblk_t sb_block, 2277bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2278ac27a0ecSDave Kleikamp { 2279617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2280617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2281617ba13bSMingming Cao ext4_fsblk_t last_block; 2282bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2283bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2284bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2285ce421581SJose R. Santos int flexbg_flag = 0; 2286bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2287ac27a0ecSDave Kleikamp 2288e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 2289ce421581SJose R. Santos flexbg_flag = 1; 2290ce421581SJose R. Santos 2291617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2292ac27a0ecSDave Kleikamp 2293197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2294197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2295197cd65aSAkinobu Mita 2296ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2297bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2298ac27a0ecSDave Kleikamp else 2299ac27a0ecSDave Kleikamp last_block = first_block + 2300617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2301ac27a0ecSDave Kleikamp 2302bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2303bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2304bfff6873SLukas Czerner grp = i; 2305bfff6873SLukas Czerner 23068fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 2307829fa70dSTheodore Ts'o if (block_bitmap == sb_block) { 2308829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2309829fa70dSTheodore Ts'o "Block bitmap for group %u overlaps " 2310829fa70dSTheodore Ts'o "superblock", i); 2311829fa70dSTheodore Ts'o } 23122b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2313b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2314a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2315b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2316ac27a0ecSDave Kleikamp return 0; 2317ac27a0ecSDave Kleikamp } 23188fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 2319829fa70dSTheodore Ts'o if (inode_bitmap == sb_block) { 2320829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2321829fa70dSTheodore Ts'o "Inode bitmap for group %u overlaps " 2322829fa70dSTheodore Ts'o "superblock", i); 2323829fa70dSTheodore Ts'o } 23242b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2325b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2326a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2327b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2328ac27a0ecSDave Kleikamp return 0; 2329ac27a0ecSDave Kleikamp } 23308fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2331829fa70dSTheodore Ts'o if (inode_table == sb_block) { 2332829fa70dSTheodore Ts'o ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2333829fa70dSTheodore Ts'o "Inode table for group %u overlaps " 2334829fa70dSTheodore Ts'o "superblock", i); 2335829fa70dSTheodore Ts'o } 2336bd81d8eeSLaurent Vivier if (inode_table < first_block || 23372b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2338b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2339a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2340b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2341ac27a0ecSDave Kleikamp return 0; 2342ac27a0ecSDave Kleikamp } 2343955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2344feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2345b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2346b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2347e2b911c5SDarrick J. Wong i, le16_to_cpu(ext4_group_desc_csum(sb, i, 2348fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 23497ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2350955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2351717d50e4SAndreas Dilger return 0; 2352717d50e4SAndreas Dilger } 23537ee1ec4cSLi Zefan } 2354955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2355ce421581SJose R. Santos if (!flexbg_flag) 2356617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2357ac27a0ecSDave Kleikamp } 2358bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2359bfff6873SLukas Czerner *first_not_zeroed = grp; 2360ac27a0ecSDave Kleikamp return 1; 2361ac27a0ecSDave Kleikamp } 2362ac27a0ecSDave Kleikamp 2363617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2364ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2365ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2366ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2367ac27a0ecSDave Kleikamp * 2368ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2369ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2370ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2371ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2372ac27a0ecSDave Kleikamp * 2373ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2374ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2375ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2376617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2377ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2378ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2379ac27a0ecSDave Kleikamp */ 2380617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2381617ba13bSMingming Cao struct ext4_super_block *es) 2382ac27a0ecSDave Kleikamp { 2383ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 23842c98eb5eSTheodore Ts'o int ret, nr_orphans = 0, nr_truncates = 0; 2385ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2386ac27a0ecSDave Kleikamp int i; 2387ac27a0ecSDave Kleikamp #endif 2388ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2389ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2390ac27a0ecSDave Kleikamp return; 2391ac27a0ecSDave Kleikamp } 2392ac27a0ecSDave Kleikamp 2393a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2394b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2395b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2396a8f48a95SEric Sandeen return; 2397a8f48a95SEric Sandeen } 2398a8f48a95SEric Sandeen 2399d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2400d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2401d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2402d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2403d39195c3SAmir Goldstein return; 2404d39195c3SAmir Goldstein } 2405d39195c3SAmir Goldstein 2406617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2407c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2408c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 240984474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2410ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2411ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2412c25f9bc6SEric Sandeen } 2413ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2414ac27a0ecSDave Kleikamp return; 2415ac27a0ecSDave Kleikamp } 2416ac27a0ecSDave Kleikamp 2417ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2418b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2419ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2420ac27a0ecSDave Kleikamp } 2421ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2422ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2423ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2424ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2425a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2426617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2427617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2428ac27a0ecSDave Kleikamp if (ret < 0) 2429b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2430b31e1552SEric Sandeen "Cannot turn on journaled " 2431b31e1552SEric Sandeen "quota: error %d", ret); 2432ac27a0ecSDave Kleikamp } 2433ac27a0ecSDave Kleikamp } 2434ac27a0ecSDave Kleikamp #endif 2435ac27a0ecSDave Kleikamp 2436ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2437ac27a0ecSDave Kleikamp struct inode *inode; 2438ac27a0ecSDave Kleikamp 2439c65d5c6cSVegard Nossum /* 2440c65d5c6cSVegard Nossum * We may have encountered an error during cleanup; if 2441c65d5c6cSVegard Nossum * so, skip the rest. 2442c65d5c6cSVegard Nossum */ 2443c65d5c6cSVegard Nossum if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2444c65d5c6cSVegard Nossum jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2445c65d5c6cSVegard Nossum es->s_last_orphan = 0; 2446c65d5c6cSVegard Nossum break; 2447c65d5c6cSVegard Nossum } 2448c65d5c6cSVegard Nossum 244997bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 245097bd42b9SJosef Bacik if (IS_ERR(inode)) { 2451ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2452ac27a0ecSDave Kleikamp break; 2453ac27a0ecSDave Kleikamp } 2454ac27a0ecSDave Kleikamp 2455617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2456871a2931SChristoph Hellwig dquot_initialize(inode); 2457ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2458566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2459b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2460b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 246146e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2462e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2463ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 24645955102cSAl Viro inode_lock(inode); 246555f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 24662c98eb5eSTheodore Ts'o ret = ext4_truncate(inode); 24672c98eb5eSTheodore Ts'o if (ret) 24682c98eb5eSTheodore Ts'o ext4_std_error(inode->i_sb, ret); 24695955102cSAl Viro inode_unlock(inode); 2470ac27a0ecSDave Kleikamp nr_truncates++; 2471ac27a0ecSDave Kleikamp } else { 2472566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2473b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2474b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 247546e665e9SHarvey Harrison __func__, inode->i_ino); 2476ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2477ac27a0ecSDave Kleikamp inode->i_ino); 2478ac27a0ecSDave Kleikamp nr_orphans++; 2479ac27a0ecSDave Kleikamp } 2480ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2481ac27a0ecSDave Kleikamp } 2482ac27a0ecSDave Kleikamp 2483ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2484ac27a0ecSDave Kleikamp 2485ac27a0ecSDave Kleikamp if (nr_orphans) 2486b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2487b31e1552SEric Sandeen PLURAL(nr_orphans)); 2488ac27a0ecSDave Kleikamp if (nr_truncates) 2489b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2490b31e1552SEric Sandeen PLURAL(nr_truncates)); 2491ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2492ac27a0ecSDave Kleikamp /* Turn quotas off */ 2493a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2494ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2495287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2496ac27a0ecSDave Kleikamp } 2497ac27a0ecSDave Kleikamp #endif 2498ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2499ac27a0ecSDave Kleikamp } 25000b8e58a1SAndreas Dilger 2501cd2291a4SEric Sandeen /* 2502cd2291a4SEric Sandeen * Maximal extent format file size. 2503cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2504cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2505cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2506cd2291a4SEric Sandeen * so that won't be a limiting factor. 2507cd2291a4SEric Sandeen * 2508f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2509f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2510f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2511f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2512f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2513f17722f9SLukas Czerner * 2514cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2515cd2291a4SEric Sandeen */ 2516f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2517cd2291a4SEric Sandeen { 2518cd2291a4SEric Sandeen loff_t res; 2519cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2520cd2291a4SEric Sandeen 2521cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2522f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2523cd2291a4SEric Sandeen /* 252490c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2525cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2526cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2527cd2291a4SEric Sandeen */ 2528cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2529cd2291a4SEric Sandeen 2530cd2291a4SEric Sandeen /* total blocks in file system block size */ 2531cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2532cd2291a4SEric Sandeen upper_limit <<= blkbits; 2533cd2291a4SEric Sandeen } 2534cd2291a4SEric Sandeen 2535f17722f9SLukas Czerner /* 2536f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2537f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2538f17722f9SLukas Czerner * size 2539f17722f9SLukas Czerner */ 2540f17722f9SLukas Czerner res = (1LL << 32) - 1; 2541cd2291a4SEric Sandeen res <<= blkbits; 2542cd2291a4SEric Sandeen 2543cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2544cd2291a4SEric Sandeen if (res > upper_limit) 2545cd2291a4SEric Sandeen res = upper_limit; 2546cd2291a4SEric Sandeen 2547cd2291a4SEric Sandeen return res; 2548cd2291a4SEric Sandeen } 2549ac27a0ecSDave Kleikamp 2550ac27a0ecSDave Kleikamp /* 2551cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 25520fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 25530fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2554ac27a0ecSDave Kleikamp */ 2555f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2556ac27a0ecSDave Kleikamp { 2557617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 25580fc1b451SAneesh Kumar K.V int meta_blocks; 25590fc1b451SAneesh Kumar K.V loff_t upper_limit; 25600b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 25610b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 25620b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 25630b8e58a1SAndreas Dilger * 25640b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 25650b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 25660fc1b451SAneesh Kumar K.V */ 25670fc1b451SAneesh Kumar K.V 2568f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 25690fc1b451SAneesh Kumar K.V /* 257090c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 25710b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 25720b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 25730fc1b451SAneesh Kumar K.V */ 25740fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 25750fc1b451SAneesh Kumar K.V 25760fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 25770fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 25780fc1b451SAneesh Kumar K.V 25790fc1b451SAneesh Kumar K.V } else { 25808180a562SAneesh Kumar K.V /* 25818180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 25828180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 25838180a562SAneesh Kumar K.V * represent total number of blocks in 25848180a562SAneesh Kumar K.V * file system block size 25858180a562SAneesh Kumar K.V */ 25860fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 25870fc1b451SAneesh Kumar K.V 25880fc1b451SAneesh Kumar K.V } 25890fc1b451SAneesh Kumar K.V 25900fc1b451SAneesh Kumar K.V /* indirect blocks */ 25910fc1b451SAneesh Kumar K.V meta_blocks = 1; 25920fc1b451SAneesh Kumar K.V /* double indirect blocks */ 25930fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 25940fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 25950fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 25960fc1b451SAneesh Kumar K.V 25970fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 25980fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2599ac27a0ecSDave Kleikamp 2600ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2601ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2602ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2603ac27a0ecSDave Kleikamp res <<= bits; 2604ac27a0ecSDave Kleikamp if (res > upper_limit) 2605ac27a0ecSDave Kleikamp res = upper_limit; 26060fc1b451SAneesh Kumar K.V 26070fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 26080fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 26090fc1b451SAneesh Kumar K.V 2610ac27a0ecSDave Kleikamp return res; 2611ac27a0ecSDave Kleikamp } 2612ac27a0ecSDave Kleikamp 2613617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 261470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2615ac27a0ecSDave Kleikamp { 2616617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2617fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2618ac27a0ecSDave Kleikamp int has_super = 0; 2619ac27a0ecSDave Kleikamp 2620ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2621ac27a0ecSDave Kleikamp 2622e2b911c5SDarrick J. Wong if (!ext4_has_feature_meta_bg(sb) || nr < first_meta_bg) 262370bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2624ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2625617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2626ac27a0ecSDave Kleikamp has_super = 1; 26270b8e58a1SAndreas Dilger 2628bd63f6b0SDarrick J. Wong /* 2629bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2630bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2631bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2632bd63f6b0SDarrick J. Wong * compensate. 2633bd63f6b0SDarrick J. Wong */ 2634bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2635bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2636bd63f6b0SDarrick J. Wong has_super++; 2637bd63f6b0SDarrick J. Wong 2638617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2639ac27a0ecSDave Kleikamp } 2640ac27a0ecSDave Kleikamp 2641c9de560dSAlex Tomas /** 2642c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2643c9de560dSAlex Tomas * @sbi: In memory super block info 2644c9de560dSAlex Tomas * 2645c9de560dSAlex Tomas * If we have specified it via mount option, then 2646c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2647c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2648c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2649c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2650c9de560dSAlex Tomas * 2651c9de560dSAlex Tomas */ 2652c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2653c9de560dSAlex Tomas { 2654c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2655c9de560dSAlex Tomas unsigned long stripe_width = 2656c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 26573eb08658SDan Ehrenberg int ret; 2658c9de560dSAlex Tomas 2659c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 26603eb08658SDan Ehrenberg ret = sbi->s_stripe; 26615469d7c3SJan Kara else if (stripe_width && stripe_width <= sbi->s_blocks_per_group) 26623eb08658SDan Ehrenberg ret = stripe_width; 26635469d7c3SJan Kara else if (stride && stride <= sbi->s_blocks_per_group) 26643eb08658SDan Ehrenberg ret = stride; 26653eb08658SDan Ehrenberg else 26663eb08658SDan Ehrenberg ret = 0; 2667c9de560dSAlex Tomas 26683eb08658SDan Ehrenberg /* 26693eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 26703eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 26713eb08658SDan Ehrenberg */ 26723eb08658SDan Ehrenberg if (ret <= 1) 26733eb08658SDan Ehrenberg ret = 0; 2674c9de560dSAlex Tomas 26753eb08658SDan Ehrenberg return ret; 2676c9de560dSAlex Tomas } 2677ac27a0ecSDave Kleikamp 2678a13fb1a4SEric Sandeen /* 2679a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2680a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2681a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2682a13fb1a4SEric Sandeen * 0 if it cannot be. 2683a13fb1a4SEric Sandeen */ 2684a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2685a13fb1a4SEric Sandeen { 2686e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_incompat_features(sb)) { 2687a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2688a13fb1a4SEric Sandeen "Couldn't mount because of " 2689a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2690a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2691a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2692a13fb1a4SEric Sandeen return 0; 2693a13fb1a4SEric Sandeen } 2694a13fb1a4SEric Sandeen 2695a13fb1a4SEric Sandeen if (readonly) 2696a13fb1a4SEric Sandeen return 1; 2697a13fb1a4SEric Sandeen 2698e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb)) { 26992cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 27002cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 27012cb5cc8bSDarrick J. Wong return 1; 27022cb5cc8bSDarrick J. Wong } 27032cb5cc8bSDarrick J. Wong 2704a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2705e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext4_ro_compat_features(sb)) { 2706a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2707a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2708a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2709a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2710a13fb1a4SEric Sandeen return 0; 2711a13fb1a4SEric Sandeen } 2712a13fb1a4SEric Sandeen /* 2713a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2714a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2715a13fb1a4SEric Sandeen */ 2716e2b911c5SDarrick J. Wong if (ext4_has_feature_huge_file(sb)) { 2717a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2718a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2719a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2720a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2721a13fb1a4SEric Sandeen return 0; 2722a13fb1a4SEric Sandeen } 2723a13fb1a4SEric Sandeen } 2724e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) { 2725bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2726bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2727bab08ab9STheodore Ts'o "extents feature\n"); 2728bab08ab9STheodore Ts'o return 0; 2729bab08ab9STheodore Ts'o } 27307c319d32SAditya Kali 27317c319d32SAditya Kali #ifndef CONFIG_QUOTA 2732e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !readonly) { 27337c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 27347c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 27357c319d32SAditya Kali "without CONFIG_QUOTA"); 27367c319d32SAditya Kali return 0; 27377c319d32SAditya Kali } 2738689c958cSLi Xi if (ext4_has_feature_project(sb) && !readonly) { 2739689c958cSLi Xi ext4_msg(sb, KERN_ERR, 2740689c958cSLi Xi "Filesystem with project quota feature cannot be mounted RDWR " 2741689c958cSLi Xi "without CONFIG_QUOTA"); 2742689c958cSLi Xi return 0; 2743689c958cSLi Xi } 27447c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2745a13fb1a4SEric Sandeen return 1; 2746a13fb1a4SEric Sandeen } 2747a13fb1a4SEric Sandeen 274866e61a9eSTheodore Ts'o /* 274966e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 275066e61a9eSTheodore Ts'o * on the file system 275166e61a9eSTheodore Ts'o */ 275266e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 275366e61a9eSTheodore Ts'o { 275466e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 275566e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 275666e61a9eSTheodore Ts'o struct ext4_super_block *es; 275766e61a9eSTheodore Ts'o 275866e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 275966e61a9eSTheodore Ts'o es = sbi->s_es; 276066e61a9eSTheodore Ts'o 276166e61a9eSTheodore Ts'o if (es->s_error_count) 2762ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2763ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 276466e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 276566e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2766ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 276766e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 276866e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 276966e61a9eSTheodore Ts'o es->s_first_error_func, 277066e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 277166e61a9eSTheodore Ts'o if (es->s_first_error_ino) 2772651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 277366e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 277466e61a9eSTheodore Ts'o if (es->s_first_error_block) 2775651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 277666e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 2777651e1c3bSJoe Perches printk(KERN_CONT "\n"); 277866e61a9eSTheodore Ts'o } 277966e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2780ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 278166e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 278266e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 278366e61a9eSTheodore Ts'o es->s_last_error_func, 278466e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 278566e61a9eSTheodore Ts'o if (es->s_last_error_ino) 2786651e1c3bSJoe Perches printk(KERN_CONT ": inode %u", 278766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 278866e61a9eSTheodore Ts'o if (es->s_last_error_block) 2789651e1c3bSJoe Perches printk(KERN_CONT ": block %llu", (unsigned long long) 279066e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 2791651e1c3bSJoe Perches printk(KERN_CONT "\n"); 279266e61a9eSTheodore Ts'o } 279366e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 279466e61a9eSTheodore Ts'o } 279566e61a9eSTheodore Ts'o 2796bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2797bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2798bfff6873SLukas Czerner { 2799bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2800bfff6873SLukas Czerner ext4_group_t group, ngroups; 2801bfff6873SLukas Czerner struct super_block *sb; 2802bfff6873SLukas Czerner unsigned long timeout = 0; 2803bfff6873SLukas Czerner int ret = 0; 2804bfff6873SLukas Czerner 2805bfff6873SLukas Czerner sb = elr->lr_super; 2806bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2807bfff6873SLukas Czerner 2808bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2809bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2810bfff6873SLukas Czerner if (!gdp) { 2811bfff6873SLukas Czerner ret = 1; 2812bfff6873SLukas Czerner break; 2813bfff6873SLukas Czerner } 2814bfff6873SLukas Czerner 2815bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2816bfff6873SLukas Czerner break; 2817bfff6873SLukas Czerner } 2818bfff6873SLukas Czerner 28197f511862STheodore Ts'o if (group >= ngroups) 2820bfff6873SLukas Czerner ret = 1; 2821bfff6873SLukas Czerner 2822bfff6873SLukas Czerner if (!ret) { 2823bfff6873SLukas Czerner timeout = jiffies; 2824bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2825bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2826bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 282751ce6511SLukas Czerner timeout = (jiffies - timeout) * 282851ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2829bfff6873SLukas Czerner elr->lr_timeout = timeout; 2830bfff6873SLukas Czerner } 2831bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2832bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2833bfff6873SLukas Czerner } 2834bfff6873SLukas Czerner return ret; 2835bfff6873SLukas Czerner } 2836bfff6873SLukas Czerner 2837bfff6873SLukas Czerner /* 2838bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28394ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2840bfff6873SLukas Czerner */ 2841bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2842bfff6873SLukas Czerner { 2843bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2844bfff6873SLukas Czerner 2845bfff6873SLukas Czerner if (!elr) 2846bfff6873SLukas Czerner return; 2847bfff6873SLukas Czerner 2848bfff6873SLukas Czerner sbi = elr->lr_sbi; 2849bfff6873SLukas Czerner 2850bfff6873SLukas Czerner list_del(&elr->lr_request); 2851bfff6873SLukas Czerner sbi->s_li_request = NULL; 2852bfff6873SLukas Czerner kfree(elr); 2853bfff6873SLukas Czerner } 2854bfff6873SLukas Czerner 2855bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2856bfff6873SLukas Czerner { 28571bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 28581bb933fbSLukas Czerner if (!ext4_li_info) { 28591bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2860bfff6873SLukas Czerner return; 28611bb933fbSLukas Czerner } 2862bfff6873SLukas Czerner 2863bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 28641bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2865bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 28661bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2867bfff6873SLukas Czerner } 2868bfff6873SLukas Czerner 28698f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 28708f1f7453SEric Sandeen 2871bfff6873SLukas Czerner /* 2872bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2873bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2874bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2875bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2876bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2877bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2878bfff6873SLukas Czerner * next waking time and put itself into sleep. 2879bfff6873SLukas Czerner */ 2880bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2881bfff6873SLukas Czerner { 2882bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2883bfff6873SLukas Czerner struct list_head *pos, *n; 2884bfff6873SLukas Czerner struct ext4_li_request *elr; 28854ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2886bfff6873SLukas Czerner 2887bfff6873SLukas Czerner BUG_ON(NULL == eli); 2888bfff6873SLukas Czerner 2889bfff6873SLukas Czerner cont_thread: 2890bfff6873SLukas Czerner while (true) { 2891bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2892bfff6873SLukas Czerner 2893bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2894bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2895bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2896bfff6873SLukas Czerner goto exit_thread; 2897bfff6873SLukas Czerner } 2898bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2899e22834f0SDmitry Monakhov int err = 0; 2900e22834f0SDmitry Monakhov int progress = 0; 2901bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2902bfff6873SLukas Czerner lr_request); 2903bfff6873SLukas Czerner 2904e22834f0SDmitry Monakhov if (time_before(jiffies, elr->lr_next_sched)) { 2905e22834f0SDmitry Monakhov if (time_before(elr->lr_next_sched, next_wakeup)) 2906e22834f0SDmitry Monakhov next_wakeup = elr->lr_next_sched; 2907e22834f0SDmitry Monakhov continue; 2908e22834f0SDmitry Monakhov } 2909e22834f0SDmitry Monakhov if (down_read_trylock(&elr->lr_super->s_umount)) { 2910e22834f0SDmitry Monakhov if (sb_start_write_trylock(elr->lr_super)) { 2911e22834f0SDmitry Monakhov progress = 1; 2912e22834f0SDmitry Monakhov /* 2913e22834f0SDmitry Monakhov * We hold sb->s_umount, sb can not 2914e22834f0SDmitry Monakhov * be removed from the list, it is 2915e22834f0SDmitry Monakhov * now safe to drop li_list_mtx 2916e22834f0SDmitry Monakhov */ 2917e22834f0SDmitry Monakhov mutex_unlock(&eli->li_list_mtx); 2918e22834f0SDmitry Monakhov err = ext4_run_li_request(elr); 2919e22834f0SDmitry Monakhov sb_end_write(elr->lr_super); 2920e22834f0SDmitry Monakhov mutex_lock(&eli->li_list_mtx); 2921e22834f0SDmitry Monakhov n = pos->next; 2922e22834f0SDmitry Monakhov } 2923e22834f0SDmitry Monakhov up_read((&elr->lr_super->s_umount)); 2924e22834f0SDmitry Monakhov } 2925b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2926e22834f0SDmitry Monakhov if (err) { 2927bfff6873SLukas Czerner ext4_remove_li_request(elr); 2928bfff6873SLukas Czerner continue; 2929bfff6873SLukas Czerner } 2930e22834f0SDmitry Monakhov if (!progress) { 2931e22834f0SDmitry Monakhov elr->lr_next_sched = jiffies + 2932e22834f0SDmitry Monakhov (prandom_u32() 2933e22834f0SDmitry Monakhov % (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 2934b2c78cd0STheodore Ts'o } 2935bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2936bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2937bfff6873SLukas Czerner } 2938bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2939bfff6873SLukas Czerner 2940a0acae0eSTejun Heo try_to_freeze(); 2941bfff6873SLukas Czerner 29424ed5c033SLukas Czerner cur = jiffies; 29434ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2944f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2945bfff6873SLukas Czerner cond_resched(); 2946bfff6873SLukas Czerner continue; 2947bfff6873SLukas Czerner } 2948bfff6873SLukas Czerner 29494ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29504ed5c033SLukas Czerner 29518f1f7453SEric Sandeen if (kthread_should_stop()) { 29528f1f7453SEric Sandeen ext4_clear_request_list(); 29538f1f7453SEric Sandeen goto exit_thread; 29548f1f7453SEric Sandeen } 2955bfff6873SLukas Czerner } 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner exit_thread: 2958bfff6873SLukas Czerner /* 2959bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2960bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2961bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2962bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2963bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2964bfff6873SLukas Czerner * new one. 2965bfff6873SLukas Czerner */ 2966bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2967bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2968bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2969bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2970bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2971bfff6873SLukas Czerner goto cont_thread; 2972bfff6873SLukas Czerner } 2973bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2974bfff6873SLukas Czerner kfree(ext4_li_info); 2975bfff6873SLukas Czerner ext4_li_info = NULL; 2976bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2977bfff6873SLukas Czerner 2978bfff6873SLukas Czerner return 0; 2979bfff6873SLukas Czerner } 2980bfff6873SLukas Czerner 2981bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2982bfff6873SLukas Czerner { 2983bfff6873SLukas Czerner struct list_head *pos, *n; 2984bfff6873SLukas Czerner struct ext4_li_request *elr; 2985bfff6873SLukas Czerner 2986bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2987bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2988bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2989bfff6873SLukas Czerner lr_request); 2990bfff6873SLukas Czerner ext4_remove_li_request(elr); 2991bfff6873SLukas Czerner } 2992bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2993bfff6873SLukas Czerner } 2994bfff6873SLukas Czerner 2995bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2996bfff6873SLukas Czerner { 29978f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 29988f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 29998f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30008f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3001bfff6873SLukas Czerner ext4_clear_request_list(); 3002bfff6873SLukas Czerner kfree(ext4_li_info); 3003bfff6873SLukas Czerner ext4_li_info = NULL; 300492b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3005bfff6873SLukas Czerner "initialization thread\n", 3006bfff6873SLukas Czerner err); 3007bfff6873SLukas Czerner return err; 3008bfff6873SLukas Czerner } 3009bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3010bfff6873SLukas Czerner return 0; 3011bfff6873SLukas Czerner } 3012bfff6873SLukas Czerner 3013bfff6873SLukas Czerner /* 3014bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3015bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3016bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3017bfff6873SLukas Czerner * groups and return total number of groups. 3018bfff6873SLukas Czerner */ 3019bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3020bfff6873SLukas Czerner { 3021bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3022bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3023bfff6873SLukas Czerner 3024bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3025bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3026bfff6873SLukas Czerner if (!gdp) 3027bfff6873SLukas Czerner continue; 3028bfff6873SLukas Czerner 3029bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3030bfff6873SLukas Czerner break; 3031bfff6873SLukas Czerner } 3032bfff6873SLukas Czerner 3033bfff6873SLukas Czerner return group; 3034bfff6873SLukas Czerner } 3035bfff6873SLukas Czerner 3036bfff6873SLukas Czerner static int ext4_li_info_new(void) 3037bfff6873SLukas Czerner { 3038bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3039bfff6873SLukas Czerner 3040bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3041bfff6873SLukas Czerner if (!eli) 3042bfff6873SLukas Czerner return -ENOMEM; 3043bfff6873SLukas Czerner 3044bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3045bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3046bfff6873SLukas Czerner 3047bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3048bfff6873SLukas Czerner 3049bfff6873SLukas Czerner ext4_li_info = eli; 3050bfff6873SLukas Czerner 3051bfff6873SLukas Czerner return 0; 3052bfff6873SLukas Czerner } 3053bfff6873SLukas Czerner 3054bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3055bfff6873SLukas Czerner ext4_group_t start) 3056bfff6873SLukas Czerner { 3057bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3058bfff6873SLukas Czerner struct ext4_li_request *elr; 3059bfff6873SLukas Czerner 3060bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3061bfff6873SLukas Czerner if (!elr) 3062bfff6873SLukas Czerner return NULL; 3063bfff6873SLukas Czerner 3064bfff6873SLukas Czerner elr->lr_super = sb; 3065bfff6873SLukas Czerner elr->lr_sbi = sbi; 3066bfff6873SLukas Czerner elr->lr_next_group = start; 3067bfff6873SLukas Czerner 3068bfff6873SLukas Czerner /* 3069bfff6873SLukas Czerner * Randomize first schedule time of the request to 3070bfff6873SLukas Czerner * spread the inode table initialization requests 3071bfff6873SLukas Czerner * better. 3072bfff6873SLukas Czerner */ 3073dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3074dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3075bfff6873SLukas Czerner return elr; 3076bfff6873SLukas Czerner } 3077bfff6873SLukas Czerner 30787f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3079bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3080bfff6873SLukas Czerner { 3081bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 30827f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3083bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30846c5a6cb9SAndrew Morton int ret = 0; 3085bfff6873SLukas Czerner 30867f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 308751ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 308851ce6511SLukas Czerner /* 308951ce6511SLukas Czerner * Reset timeout so it can be computed again, because 309051ce6511SLukas Czerner * s_li_wait_mult might have changed. 309151ce6511SLukas Czerner */ 309251ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 30937f511862STheodore Ts'o goto out; 309451ce6511SLukas Czerner } 3095bfff6873SLukas Czerner 3096bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3097bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 309855ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 30997f511862STheodore Ts'o goto out; 3100bfff6873SLukas Czerner 3101bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31027f511862STheodore Ts'o if (!elr) { 31037f511862STheodore Ts'o ret = -ENOMEM; 31047f511862STheodore Ts'o goto out; 31057f511862STheodore Ts'o } 3106bfff6873SLukas Czerner 3107bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3108bfff6873SLukas Czerner ret = ext4_li_info_new(); 3109bfff6873SLukas Czerner if (ret) 3110bfff6873SLukas Czerner goto out; 3111bfff6873SLukas Czerner } 3112bfff6873SLukas Czerner 3113bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3114bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3115bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3116bfff6873SLukas Czerner 3117bfff6873SLukas Czerner sbi->s_li_request = elr; 311846e4690bSTao Ma /* 311946e4690bSTao Ma * set elr to NULL here since it has been inserted to 312046e4690bSTao Ma * the request_list and the removal and free of it is 312146e4690bSTao Ma * handled by ext4_clear_request_list from now on. 312246e4690bSTao Ma */ 312346e4690bSTao Ma elr = NULL; 3124bfff6873SLukas Czerner 3125bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3126bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3127bfff6873SLukas Czerner if (ret) 3128bfff6873SLukas Czerner goto out; 3129bfff6873SLukas Czerner } 3130bfff6873SLukas Czerner out: 3131bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3132beed5ecbSNicolas Kaiser if (ret) 3133bfff6873SLukas Czerner kfree(elr); 3134bfff6873SLukas Czerner return ret; 3135bfff6873SLukas Czerner } 3136bfff6873SLukas Czerner 3137bfff6873SLukas Czerner /* 3138bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3139bfff6873SLukas Czerner * module unload. 3140bfff6873SLukas Czerner */ 3141bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3142bfff6873SLukas Czerner { 3143bfff6873SLukas Czerner /* 3144bfff6873SLukas Czerner * If thread exited earlier 3145bfff6873SLukas Czerner * there's nothing to be done. 3146bfff6873SLukas Czerner */ 31478f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3148bfff6873SLukas Czerner return; 3149bfff6873SLukas Czerner 31508f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3151bfff6873SLukas Czerner } 3152bfff6873SLukas Czerner 315325ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 315425ed6e8aSDarrick J. Wong { 315525ed6e8aSDarrick J. Wong int ret = 1; 315625ed6e8aSDarrick J. Wong int compat, incompat; 315725ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 315825ed6e8aSDarrick J. Wong 31599aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3160db9ee220SDarrick J. Wong /* journal checksum v3 */ 316125ed6e8aSDarrick J. Wong compat = 0; 3162db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 316325ed6e8aSDarrick J. Wong } else { 316425ed6e8aSDarrick J. Wong /* journal checksum v1 */ 316525ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 316625ed6e8aSDarrick J. Wong incompat = 0; 316725ed6e8aSDarrick J. Wong } 316825ed6e8aSDarrick J. Wong 3169feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3170feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3171feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3172feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 317325ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 317425ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 317525ed6e8aSDarrick J. Wong compat, 0, 317625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 317725ed6e8aSDarrick J. Wong incompat); 317825ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 317925ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 318025ed6e8aSDarrick J. Wong compat, 0, 318125ed6e8aSDarrick J. Wong incompat); 318225ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 318325ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 318425ed6e8aSDarrick J. Wong } else { 3185feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3186feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 318725ed6e8aSDarrick J. Wong } 318825ed6e8aSDarrick J. Wong 318925ed6e8aSDarrick J. Wong return ret; 319025ed6e8aSDarrick J. Wong } 319125ed6e8aSDarrick J. Wong 3192952fc18eSTheodore Ts'o /* 3193952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3194952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3195952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3196952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3197952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3198952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3199952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3200952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3201952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3202952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3203952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3204952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3205952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3206952fc18eSTheodore Ts'o */ 3207952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3208952fc18eSTheodore Ts'o char *buf) 3209952fc18eSTheodore Ts'o { 3210952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3211952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3212952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3213952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3214952fc18eSTheodore Ts'o int s, j, count = 0; 3215952fc18eSTheodore Ts'o 3216e2b911c5SDarrick J. Wong if (!ext4_has_feature_bigalloc(sb)) 32170548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32180548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32190548bbb8STheodore Ts'o 3220952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3221952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3222952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3223952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3224952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3225952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3226952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3227952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3228952fc18eSTheodore Ts'o count++; 3229952fc18eSTheodore Ts'o } 3230952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3231952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3232952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3233952fc18eSTheodore Ts'o count++; 3234952fc18eSTheodore Ts'o } 3235952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3236952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3237952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3238952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3239952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3240952fc18eSTheodore Ts'o count++; 3241952fc18eSTheodore Ts'o } 3242952fc18eSTheodore Ts'o if (i != grp) 3243952fc18eSTheodore Ts'o continue; 3244952fc18eSTheodore Ts'o s = 0; 3245952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3246952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3247952fc18eSTheodore Ts'o count++; 3248952fc18eSTheodore Ts'o } 3249c48ae41bSTheodore Ts'o j = ext4_bg_num_gdb(sb, grp); 3250c48ae41bSTheodore Ts'o if (s + j > EXT4_BLOCKS_PER_GROUP(sb)) { 3251c48ae41bSTheodore Ts'o ext4_error(sb, "Invalid number of block group " 3252c48ae41bSTheodore Ts'o "descriptor blocks: %d", j); 3253c48ae41bSTheodore Ts'o j = EXT4_BLOCKS_PER_GROUP(sb) - s; 3254952fc18eSTheodore Ts'o } 3255c48ae41bSTheodore Ts'o count += j; 3256c48ae41bSTheodore Ts'o for (; j > 0; j--) 3257c48ae41bSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3258952fc18eSTheodore Ts'o } 3259952fc18eSTheodore Ts'o if (!count) 3260952fc18eSTheodore Ts'o return 0; 3261952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3262952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3263952fc18eSTheodore Ts'o } 3264952fc18eSTheodore Ts'o 3265952fc18eSTheodore Ts'o /* 3266952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3267952fc18eSTheodore Ts'o */ 3268952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3269952fc18eSTheodore Ts'o { 3270952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3271952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 32723c816dedSEric Whitney struct inode *j_inode; 32733c816dedSEric Whitney unsigned int j_blocks, j_inum = le32_to_cpu(es->s_journal_inum); 3274952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3275952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 32764fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3277952fc18eSTheodore Ts'o 3278952fc18eSTheodore Ts'o if (!buf) 3279952fc18eSTheodore Ts'o return -ENOMEM; 3280952fc18eSTheodore Ts'o 3281952fc18eSTheodore Ts'o /* 3282952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3283952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3284952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3285952fc18eSTheodore Ts'o */ 3286952fc18eSTheodore Ts'o 3287952fc18eSTheodore Ts'o /* 3288952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3289952fc18eSTheodore Ts'o */ 3290952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3291952fc18eSTheodore Ts'o 3292952fc18eSTheodore Ts'o /* 3293952fc18eSTheodore Ts'o * Add the overhead found in each block group 3294952fc18eSTheodore Ts'o */ 3295952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3296952fc18eSTheodore Ts'o int blks; 3297952fc18eSTheodore Ts'o 3298952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3299952fc18eSTheodore Ts'o overhead += blks; 3300952fc18eSTheodore Ts'o if (blks) 3301952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3302952fc18eSTheodore Ts'o cond_resched(); 3303952fc18eSTheodore Ts'o } 33043c816dedSEric Whitney 33053c816dedSEric Whitney /* 33063c816dedSEric Whitney * Add the internal journal blocks whether the journal has been 33073c816dedSEric Whitney * loaded or not 33083c816dedSEric Whitney */ 3309b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3310810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33113c816dedSEric Whitney else if (ext4_has_feature_journal(sb) && !sbi->s_journal) { 33123c816dedSEric Whitney j_inode = ext4_get_journal_inode(sb, j_inum); 33133c816dedSEric Whitney if (j_inode) { 33143c816dedSEric Whitney j_blocks = j_inode->i_size >> sb->s_blocksize_bits; 33153c816dedSEric Whitney overhead += EXT4_NUM_B2C(sbi, j_blocks); 33163c816dedSEric Whitney iput(j_inode); 33173c816dedSEric Whitney } else { 33183c816dedSEric Whitney ext4_msg(sb, KERN_ERR, "can't get journal size"); 33193c816dedSEric Whitney } 33203c816dedSEric Whitney } 3321952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3322952fc18eSTheodore Ts'o smp_wmb(); 3323952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3324952fc18eSTheodore Ts'o return 0; 3325952fc18eSTheodore Ts'o } 3326952fc18eSTheodore Ts'o 3327b5799018STheodore Ts'o static void ext4_set_resv_clusters(struct super_block *sb) 332827dd4385SLukas Czerner { 332927dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 3330b5799018STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 333127dd4385SLukas Czerner 333227dd4385SLukas Czerner /* 333330fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 333430fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 333530fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 333630fac0f7SJan Kara * to keep ext2/3 backward compatibility. 333730fac0f7SJan Kara */ 3338e2b911c5SDarrick J. Wong if (!ext4_has_feature_extents(sb)) 3339b5799018STheodore Ts'o return; 334030fac0f7SJan Kara /* 334127dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 334227dd4385SLukas Czerner * This should cover the situations where we can not afford to run 334327dd4385SLukas Czerner * out of space like for example punch hole, or converting 3344556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 334527dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 334627dd4385SLukas Czerner * very rare. 334727dd4385SLukas Czerner */ 3348b5799018STheodore Ts'o resv_clusters = (ext4_blocks_count(sbi->s_es) >> 3349b5799018STheodore Ts'o sbi->s_cluster_bits); 335027dd4385SLukas Czerner 335127dd4385SLukas Czerner do_div(resv_clusters, 50); 335227dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 335327dd4385SLukas Czerner 3354b5799018STheodore Ts'o atomic64_set(&sbi->s_resv_clusters, resv_clusters); 335527dd4385SLukas Czerner } 335627dd4385SLukas Czerner 3357617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3358ac27a0ecSDave Kleikamp { 3359d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3360ac27a0ecSDave Kleikamp struct buffer_head *bh; 3361617ba13bSMingming Cao struct ext4_super_block *es = NULL; 33625aee0f8aSTheodore Ts'o struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3363617ba13bSMingming Cao ext4_fsblk_t block; 3364617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 336570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3366ac27a0ecSDave Kleikamp unsigned long offset = 0; 3367ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3368ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3369ac27a0ecSDave Kleikamp struct inode *root; 33700390131bSFrank Mayhar const char *descr; 3371dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3372281b5995STheodore Ts'o int blocksize, clustersize; 33734ec11028STheodore Ts'o unsigned int db_count; 33744ec11028STheodore Ts'o unsigned int i; 3375281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3376bd81d8eeSLaurent Vivier __u64 blocks_count; 337707aa2ea1SLukas Czerner int err = 0; 3378b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3379bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3380ac27a0ecSDave Kleikamp 33815aee0f8aSTheodore Ts'o if ((data && !orig_data) || !sbi) 33825aee0f8aSTheodore Ts'o goto out_free_base; 3383705895b6SPekka Enberg 3384705895b6SPekka Enberg sbi->s_blockgroup_lock = 3385705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 33865aee0f8aSTheodore Ts'o if (!sbi->s_blockgroup_lock) 33875aee0f8aSTheodore Ts'o goto out_free_base; 33885aee0f8aSTheodore Ts'o 3389ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 33902c0544b2STheodore Ts'o sbi->s_sb = sb; 3391240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3392d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3393f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3394f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3395f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3396ac27a0ecSDave Kleikamp 33979f6200bbSTheodore Ts'o /* Cleanup superblock name */ 3398ec3904dcSRasmus Villemoes strreplace(sb->s_id, '/', '!'); 33999f6200bbSTheodore Ts'o 340007aa2ea1SLukas Czerner /* -EINVAL is default */ 3401dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3402617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3403ac27a0ecSDave Kleikamp if (!blocksize) { 3404b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3405ac27a0ecSDave Kleikamp goto out_fail; 3406ac27a0ecSDave Kleikamp } 3407ac27a0ecSDave Kleikamp 3408ac27a0ecSDave Kleikamp /* 3409617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3410ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3411ac27a0ecSDave Kleikamp */ 3412617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 341370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 341470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3415ac27a0ecSDave Kleikamp } else { 341670bbb3e0SAndrew Morton logical_sb_block = sb_block; 3417ac27a0ecSDave Kleikamp } 3418ac27a0ecSDave Kleikamp 3419a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3420b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3421ac27a0ecSDave Kleikamp goto out_fail; 3422ac27a0ecSDave Kleikamp } 3423ac27a0ecSDave Kleikamp /* 3424ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3425617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3426ac27a0ecSDave Kleikamp */ 34272716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3428ac27a0ecSDave Kleikamp sbi->s_es = es; 3429ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3430617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3431617ba13bSMingming Cao goto cantfind_ext4; 3432afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3433ac27a0ecSDave Kleikamp 3434feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3435e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb) && 3436e2b911c5SDarrick J. Wong ext4_has_feature_gdt_csum(sb)) 3437363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3438feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3439feb0ab32SDarrick J. Wong 3440d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3441d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3442d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3443d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3444d25425f8SDarrick J. Wong silent = 1; 3445d25425f8SDarrick J. Wong goto cantfind_ext4; 3446d25425f8SDarrick J. Wong } 3447d25425f8SDarrick J. Wong 34480441984aSDarrick J. Wong /* Load the checksum driver */ 3449e2b911c5SDarrick J. Wong if (ext4_has_feature_metadata_csum(sb)) { 34500441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 34510441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 34520441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 34530441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 34540441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 34550441984aSDarrick J. Wong goto failed_mount; 34560441984aSDarrick J. Wong } 34570441984aSDarrick J. Wong } 34580441984aSDarrick J. Wong 3459a9c47317SDarrick J. Wong /* Check superblock checksum */ 3460a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3461a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3462a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3463a9c47317SDarrick J. Wong silent = 1; 34646a797d27SDarrick J. Wong ret = -EFSBADCRC; 3465a9c47317SDarrick J. Wong goto cantfind_ext4; 3466a9c47317SDarrick J. Wong } 3467a9c47317SDarrick J. Wong 3468a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3469e2b911c5SDarrick J. Wong if (ext4_has_feature_csum_seed(sb)) 34708c81bd8fSDarrick J. Wong sbi->s_csum_seed = le32_to_cpu(es->s_checksum_seed); 34718c81bd8fSDarrick J. Wong else if (ext4_has_metadata_csum(sb)) 3472a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3473a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3474a9c47317SDarrick J. Wong 3475ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3476ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3477fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3478617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3479fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 348087f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3481fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3482617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3483fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3484ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3485fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 348603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3487fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 34882e7842b8SHugh Dickins #endif 348998c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 349098c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 349198c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 349298c1a759SDarrick J. Wong 3493617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3494fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3495617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3496fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3497617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3498fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3499ac27a0ecSDave Kleikamp 3500617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3501fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3502bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3503fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3504bb4f397aSAneesh Kumar K.V else 3505fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 350645f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3507fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35088b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3509fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3510ac27a0ecSDave Kleikamp 351108cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 351208cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 351330773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 351430773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 351530773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3516ac27a0ecSDave Kleikamp 35178b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3518fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3519ac27a0ecSDave Kleikamp 35201e2462f9SMingming Cao /* 3521dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3522dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3523dd919b98SAneesh Kumar K.V */ 3524bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35258b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3526fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3527dd919b98SAneesh Kumar K.V 352851ce6511SLukas Czerner /* 352951ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 353051ce6511SLukas Czerner * no mount option specified. 353151ce6511SLukas Czerner */ 353251ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 353351ce6511SLukas Czerner 35345aee0f8aSTheodore Ts'o if (sbi->s_es->s_mount_opts[0]) { 35355aee0f8aSTheodore Ts'o char *s_mount_opts = kstrndup(sbi->s_es->s_mount_opts, 35365aee0f8aSTheodore Ts'o sizeof(sbi->s_es->s_mount_opts), 35375aee0f8aSTheodore Ts'o GFP_KERNEL); 35385aee0f8aSTheodore Ts'o if (!s_mount_opts) 35395aee0f8aSTheodore Ts'o goto failed_mount; 35405aee0f8aSTheodore Ts'o if (!parse_options(s_mount_opts, sb, &journal_devnum, 35415aee0f8aSTheodore Ts'o &journal_ioprio, 0)) { 35428b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35438b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35445aee0f8aSTheodore Ts'o s_mount_opts); 35455aee0f8aSTheodore Ts'o } 35465aee0f8aSTheodore Ts'o kfree(s_mount_opts); 35478b67f04aSTheodore Ts'o } 35485a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3549b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3550661aa520SEric Sandeen &journal_ioprio, 0)) 3551ac27a0ecSDave Kleikamp goto failed_mount; 3552ac27a0ecSDave Kleikamp 355356889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 355456889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 355556889787STheodore Ts'o "with data=journal disables delayed " 355656889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 355756889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 355856889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 355956889787STheodore Ts'o "both data=journal and delalloc"); 356056889787STheodore Ts'o goto failed_mount; 356156889787STheodore Ts'o } 356256889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 356356889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 35646ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 356556889787STheodore Ts'o goto failed_mount; 356656889787STheodore Ts'o } 3567923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3568923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3569923ae0ffSRoss Zwisler "both data=journal and dax"); 3570923ae0ffSRoss Zwisler goto failed_mount; 3571923ae0ffSRoss Zwisler } 357273b92a2aSSergey Karamov if (ext4_has_feature_encrypt(sb)) { 357373b92a2aSSergey Karamov ext4_msg(sb, KERN_WARNING, 357473b92a2aSSergey Karamov "encrypted files will use data=ordered " 357573b92a2aSSergey Karamov "instead of data journaling mode"); 357673b92a2aSSergey Karamov } 357756889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 357856889787STheodore Ts'o clear_opt(sb, DELALLOC); 3579001e4a87STejun Heo } else { 3580001e4a87STejun Heo sb->s_iflags |= SB_I_CGROUPWB; 358156889787STheodore Ts'o } 358256889787STheodore Ts'o 3583ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3584482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3585ac27a0ecSDave Kleikamp 3586617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3587e2b911c5SDarrick J. Wong (ext4_has_compat_features(sb) || 3588e2b911c5SDarrick J. Wong ext4_has_ro_compat_features(sb) || 3589e2b911c5SDarrick J. Wong ext4_has_incompat_features(sb))) 3590b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3591b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3592b31e1552SEric Sandeen "running e2fsck is recommended"); 3593469108ffSTheodore Tso 3594ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3595ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3596e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 3597ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3598ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3599ed3654ebSTheodore Ts'o goto failed_mount; 3600ed3654ebSTheodore Ts'o } 3601ed3654ebSTheodore Ts'o } 3602ed3654ebSTheodore Ts'o 36032035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36042035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36052035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36062035e776STheodore Ts'o "using the ext4 subsystem"); 36072035e776STheodore Ts'o else { 36082035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36092035e776STheodore Ts'o "to feature incompatibilities"); 36102035e776STheodore Ts'o goto failed_mount; 36112035e776STheodore Ts'o } 36122035e776STheodore Ts'o } 36132035e776STheodore Ts'o 36142035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36152035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36162035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36172035e776STheodore Ts'o "using the ext4 subsystem"); 36182035e776STheodore Ts'o else { 36192035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36202035e776STheodore Ts'o "to feature incompatibilities"); 36212035e776STheodore Ts'o goto failed_mount; 36222035e776STheodore Ts'o } 36232035e776STheodore Ts'o } 36242035e776STheodore Ts'o 3625469108ffSTheodore Tso /* 3626ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3627ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3628ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3629ac27a0ecSDave Kleikamp */ 3630a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3631ac27a0ecSDave Kleikamp goto failed_mount; 3632a13fb1a4SEric Sandeen 3633261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3634617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3635617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3636b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 36378cdf3372STheodore Ts'o "Unsupported filesystem blocksize %d (%d log_block_size)", 36388cdf3372STheodore Ts'o blocksize, le32_to_cpu(es->s_log_block_size)); 36398cdf3372STheodore Ts'o goto failed_mount; 36408cdf3372STheodore Ts'o } 36418cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_block_size) > 36428cdf3372STheodore Ts'o (EXT4_MAX_BLOCK_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 36438cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 36448cdf3372STheodore Ts'o "Invalid log block size: %u", 36458cdf3372STheodore Ts'o le32_to_cpu(es->s_log_block_size)); 3646ac27a0ecSDave Kleikamp goto failed_mount; 3647ac27a0ecSDave Kleikamp } 3648ac27a0ecSDave Kleikamp 36495b9554dcSTheodore Ts'o if (le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) > (blocksize / 4)) { 36505b9554dcSTheodore Ts'o ext4_msg(sb, KERN_ERR, 36515b9554dcSTheodore Ts'o "Number of reserved GDT blocks insanely large: %d", 36525b9554dcSTheodore Ts'o le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks)); 36535b9554dcSTheodore Ts'o goto failed_mount; 36545b9554dcSTheodore Ts'o } 36555b9554dcSTheodore Ts'o 3656923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 365787eefeb4SToshi Kani err = bdev_dax_supported(sb, blocksize); 365887eefeb4SToshi Kani if (err) 3659923ae0ffSRoss Zwisler goto failed_mount; 3660923ae0ffSRoss Zwisler } 3661923ae0ffSRoss Zwisler 3662e2b911c5SDarrick J. Wong if (ext4_has_feature_encrypt(sb) && es->s_encryption_level) { 36636ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 36646ddb2447STheodore Ts'o es->s_encryption_level); 36656ddb2447STheodore Ts'o goto failed_mount; 36666ddb2447STheodore Ts'o } 36676ddb2447STheodore Ts'o 3668ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3669ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3670ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3671b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3672ce40733cSAneesh Kumar K.V blocksize); 3673ac27a0ecSDave Kleikamp goto failed_mount; 3674ac27a0ecSDave Kleikamp } 3675ac27a0ecSDave Kleikamp 3676ac27a0ecSDave Kleikamp brelse(bh); 367770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 367870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3679a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3680ac27a0ecSDave Kleikamp if (!bh) { 3681b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3682b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3683ac27a0ecSDave Kleikamp goto failed_mount; 3684ac27a0ecSDave Kleikamp } 36852716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3686ac27a0ecSDave Kleikamp sbi->s_es = es; 3687617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3688b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3689b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3690ac27a0ecSDave Kleikamp goto failed_mount; 3691ac27a0ecSDave Kleikamp } 3692ac27a0ecSDave Kleikamp } 3693ac27a0ecSDave Kleikamp 3694e2b911c5SDarrick J. Wong has_huge_files = ext4_has_feature_huge_file(sb); 3695f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3696f287a1a5STheodore Ts'o has_huge_files); 3697f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3698ac27a0ecSDave Kleikamp 3699617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3700617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3701617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3702ac27a0ecSDave Kleikamp } else { 3703ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3704ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3705617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37061330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3707ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3708b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3709b31e1552SEric Sandeen "unsupported inode size: %d", 3710ac27a0ecSDave Kleikamp sbi->s_inode_size); 3711ac27a0ecSDave Kleikamp goto failed_mount; 3712ac27a0ecSDave Kleikamp } 3713ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3714ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3715ac27a0ecSDave Kleikamp } 37160b8e58a1SAndreas Dilger 37170d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 3718e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb)) { 37198fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37200d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3721d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3722b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3723b31e1552SEric Sandeen "unsupported descriptor size %lu", 37240d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37250d1ee42fSAlexandre Ratchov goto failed_mount; 37260d1ee42fSAlexandre Ratchov } 37270d1ee42fSAlexandre Ratchov } else 37280d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37290b8e58a1SAndreas Dilger 3730ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3731ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 37320b8e58a1SAndreas Dilger 3733617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3734ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3735617ba13bSMingming Cao goto cantfind_ext4; 3736cd6bb35bSTheodore Ts'o if (sbi->s_inodes_per_group < sbi->s_inodes_per_block || 3737cd6bb35bSTheodore Ts'o sbi->s_inodes_per_group > blocksize * 8) { 3738cd6bb35bSTheodore Ts'o ext4_msg(sb, KERN_ERR, "invalid inodes per group: %lu\n", 3739cd6bb35bSTheodore Ts'o sbi->s_blocks_per_group); 3740cd6bb35bSTheodore Ts'o goto failed_mount; 3741cd6bb35bSTheodore Ts'o } 3742ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3743ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37440d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3745ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3746ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3747e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3748e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37490b8e58a1SAndreas Dilger 3750ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3751ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3752ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3753e2b911c5SDarrick J. Wong if (ext4_has_feature_dir_index(sb)) { 3754f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3755f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3756f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3757f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3758f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 375923301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 376023301410STheodore Ts'o es->s_flags |= 376123301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3762f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3763f99b2589STheodore Ts'o #else 376423301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 376523301410STheodore Ts'o es->s_flags |= 376623301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3767f99b2589STheodore Ts'o #endif 3768f99b2589STheodore Ts'o } 376923301410STheodore Ts'o } 3770ac27a0ecSDave Kleikamp 3771281b5995STheodore Ts'o /* Handle clustersize */ 3772281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3773e2b911c5SDarrick J. Wong has_bigalloc = ext4_has_feature_bigalloc(sb); 3774281b5995STheodore Ts'o if (has_bigalloc) { 3775281b5995STheodore Ts'o if (clustersize < blocksize) { 3776281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3777281b5995STheodore Ts'o "cluster size (%d) smaller than " 3778281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3779281b5995STheodore Ts'o goto failed_mount; 3780281b5995STheodore Ts'o } 37818cdf3372STheodore Ts'o if (le32_to_cpu(es->s_log_cluster_size) > 37828cdf3372STheodore Ts'o (EXT4_MAX_CLUSTER_LOG_SIZE - EXT4_MIN_BLOCK_LOG_SIZE)) { 37838cdf3372STheodore Ts'o ext4_msg(sb, KERN_ERR, 37848cdf3372STheodore Ts'o "Invalid log cluster size: %u", 37858cdf3372STheodore Ts'o le32_to_cpu(es->s_log_cluster_size)); 37868cdf3372STheodore Ts'o goto failed_mount; 37878cdf3372STheodore Ts'o } 3788281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3789281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3790281b5995STheodore Ts'o sbi->s_clusters_per_group = 3791281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3792281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3793281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3794281b5995STheodore Ts'o "#clusters per group too big: %lu", 3795281b5995STheodore Ts'o sbi->s_clusters_per_group); 3796281b5995STheodore Ts'o goto failed_mount; 3797281b5995STheodore Ts'o } 3798281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3799281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3800281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3801281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3802281b5995STheodore Ts'o sbi->s_blocks_per_group, 3803281b5995STheodore Ts'o sbi->s_clusters_per_group); 3804281b5995STheodore Ts'o goto failed_mount; 3805281b5995STheodore Ts'o } 3806281b5995STheodore Ts'o } else { 3807281b5995STheodore Ts'o if (clustersize != blocksize) { 3808281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3809281b5995STheodore Ts'o "block size (%d)", clustersize, 3810281b5995STheodore Ts'o blocksize); 3811281b5995STheodore Ts'o clustersize = blocksize; 3812281b5995STheodore Ts'o } 3813ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3814b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3815b31e1552SEric Sandeen "#blocks per group too big: %lu", 3816ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3817ac27a0ecSDave Kleikamp goto failed_mount; 3818ac27a0ecSDave Kleikamp } 3819281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3820281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3821281b5995STheodore Ts'o } 3822281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3823281b5995STheodore Ts'o 3824960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3825960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3826960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3827960fd856STheodore Ts'o 3828bf43d84bSEric Sandeen /* 3829bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3830bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3831bf43d84bSEric Sandeen */ 38325a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 383330ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38345a9ae68aSDarrick J. Wong if (err) { 3835b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3836bf43d84bSEric Sandeen " too large to mount safely on this system"); 3837ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 383890c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3839ac27a0ecSDave Kleikamp goto failed_mount; 3840ac27a0ecSDave Kleikamp } 3841ac27a0ecSDave Kleikamp 3842617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3843617ba13bSMingming Cao goto cantfind_ext4; 3844e7c95593SEric Sandeen 38450f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38460f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38470f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3848b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3849b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38500f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38510f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38520f2ddca6SFrom: Thiemo Nagel } 38530f2ddca6SFrom: Thiemo Nagel 38544ec11028STheodore Ts'o /* 38554ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38564ec11028STheodore Ts'o * of the filesystem. 38574ec11028STheodore Ts'o */ 38584ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3859b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3860b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3861e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38624ec11028STheodore Ts'o ext4_blocks_count(es)); 3863e7c95593SEric Sandeen goto failed_mount; 3864e7c95593SEric Sandeen } 3865bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3866bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3867bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3868bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38694ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3870b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38714ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3872b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38734ec11028STheodore Ts'o ext4_blocks_count(es), 38744ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38754ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38764ec11028STheodore Ts'o goto failed_mount; 38774ec11028STheodore Ts'o } 3878bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3879fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3880fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3881617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3882617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 38833a4b77cdSEryu Guan if (ext4_has_feature_meta_bg(sb)) { 38842ba3e6e8STheodore Ts'o if (le32_to_cpu(es->s_first_meta_bg) > db_count) { 38853a4b77cdSEryu Guan ext4_msg(sb, KERN_WARNING, 38863a4b77cdSEryu Guan "first meta block group too large: %u " 38873a4b77cdSEryu Guan "(group descriptor block count %u)", 38883a4b77cdSEryu Guan le32_to_cpu(es->s_first_meta_bg), db_count); 38893a4b77cdSEryu Guan goto failed_mount; 38903a4b77cdSEryu Guan } 38913a4b77cdSEryu Guan } 3892f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3893f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3894ac27a0ecSDave Kleikamp GFP_KERNEL); 3895ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3896b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38972cde417dSTheodore Ts'o ret = -ENOMEM; 3898ac27a0ecSDave Kleikamp goto failed_mount; 3899ac27a0ecSDave Kleikamp } 3900ac27a0ecSDave Kleikamp 3901705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3902ac27a0ecSDave Kleikamp 3903ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 390470bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3905a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3906ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3907b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3908b31e1552SEric Sandeen "can't read group descriptor %d", i); 3909ac27a0ecSDave Kleikamp db_count = i; 3910ac27a0ecSDave Kleikamp goto failed_mount2; 3911ac27a0ecSDave Kleikamp } 3912ac27a0ecSDave Kleikamp } 3913829fa70dSTheodore Ts'o if (!ext4_check_descriptors(sb, logical_sb_block, &first_not_zeroed)) { 3914b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 39156a797d27SDarrick J. Wong ret = -EFSCORRUPTED; 3916f9ae9cf5STheodore Ts'o goto failed_mount2; 3917ac27a0ecSDave Kleikamp } 3918772cb7c8SJose R. Santos 3919f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3920ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3921ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3922ac27a0ecSDave Kleikamp 392304ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 392404ecddb7SJan Mrazek (unsigned long) sb); 392504496411STao Ma 3926a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3927eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3928ce7e010aSTheodore Ts'o goto failed_mount3; 3929ce7e010aSTheodore Ts'o 3930c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 393167a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3932c9de560dSAlex Tomas 3933f9ae9cf5STheodore Ts'o /* 3934f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3935f9ae9cf5STheodore Ts'o */ 3936f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3937617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3938617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3939a7550b30SJaegeuk Kim sb->s_cop = &ext4_cryptops; 3940ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3941617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3942e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb)) 39431fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3944262b4662SJan Kara else 3945262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3946689c958cSLi Xi sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; 3947ac27a0ecSDave Kleikamp #endif 3948f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3949f2fa2ffcSAneesh Kumar K.V 3950ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39513b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3952ac27a0ecSDave Kleikamp 3953ac27a0ecSDave Kleikamp sb->s_root = NULL; 3954ac27a0ecSDave Kleikamp 3955ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3956e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)); 3957ac27a0ecSDave Kleikamp 3958e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb) && !(sb->s_flags & MS_RDONLY)) 3959c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 396050460fe8SDarrick J. Wong goto failed_mount3a; 3961c5e06d10SJohann Lombardi 3962ac27a0ecSDave Kleikamp /* 3963ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3964ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3965ac27a0ecSDave Kleikamp */ 3966e2b911c5SDarrick J. Wong if (!test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) { 39674753d8a2STheodore Ts'o err = ext4_load_journal(sb, es, journal_devnum); 39684753d8a2STheodore Ts'o if (err) 396950460fe8SDarrick J. Wong goto failed_mount3a; 39700390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 3971e2b911c5SDarrick J. Wong ext4_has_feature_journal_needs_recovery(sb)) { 3972b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3973b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3974744692dcSJiaying Zhang goto failed_mount_wq; 3975ac27a0ecSDave Kleikamp } else { 39761e381f60SDmitry Monakhov /* Nojournal mode, all journal mount options are illegal */ 39771e381f60SDmitry Monakhov if (test_opt2(sb, EXPLICIT_JOURNAL_CHECKSUM)) { 39781e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 39791e381f60SDmitry Monakhov "journal_checksum, fs mounted w/o journal"); 39801e381f60SDmitry Monakhov goto failed_mount_wq; 39811e381f60SDmitry Monakhov } 39821e381f60SDmitry Monakhov if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 39831e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 39841e381f60SDmitry Monakhov "journal_async_commit, fs mounted w/o journal"); 39851e381f60SDmitry Monakhov goto failed_mount_wq; 39861e381f60SDmitry Monakhov } 39871e381f60SDmitry Monakhov if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 39881e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 39891e381f60SDmitry Monakhov "commit=%lu, fs mounted w/o journal", 39901e381f60SDmitry Monakhov sbi->s_commit_interval / HZ); 39911e381f60SDmitry Monakhov goto failed_mount_wq; 39921e381f60SDmitry Monakhov } 39931e381f60SDmitry Monakhov if (EXT4_MOUNT_DATA_FLAGS & 39941e381f60SDmitry Monakhov (sbi->s_mount_opt ^ sbi->s_def_mount_opt)) { 39951e381f60SDmitry Monakhov ext4_msg(sb, KERN_ERR, "can't mount with " 39961e381f60SDmitry Monakhov "data=, fs mounted w/o journal"); 39971e381f60SDmitry Monakhov goto failed_mount_wq; 39981e381f60SDmitry Monakhov } 39991e381f60SDmitry Monakhov sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM; 40001e381f60SDmitry Monakhov clear_opt(sb, JOURNAL_CHECKSUM); 4001fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 40020390131bSFrank Mayhar sbi->s_journal = NULL; 40030390131bSFrank Mayhar needs_recovery = 0; 40040390131bSFrank Mayhar goto no_journal; 4005ac27a0ecSDave Kleikamp } 4006ac27a0ecSDave Kleikamp 4007e2b911c5SDarrick J. Wong if (ext4_has_feature_64bit(sb) && 4008eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4009eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4010b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4011744692dcSJiaying Zhang goto failed_mount_wq; 4012eb40a09cSJose R. Santos } 4013eb40a09cSJose R. Santos 401425ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 401525ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 401625ed6e8aSDarrick J. Wong "feature set"); 401725ed6e8aSDarrick J. Wong goto failed_mount_wq; 4018d4da6c9cSLinus Torvalds } 4019818d276cSGirish Shilamkar 4020ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4021ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4022ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4023ac27a0ecSDave Kleikamp case 0: 4024ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 402563f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 402663f57933SAndrew Morton * cope, else JOURNAL_DATA 402763f57933SAndrew Morton */ 4028dab291afSMingming Cao if (jbd2_journal_check_available_features 4029dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4030fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4031ac27a0ecSDave Kleikamp else 4032fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4033ac27a0ecSDave Kleikamp break; 4034ac27a0ecSDave Kleikamp 4035617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4036617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4037dab291afSMingming Cao if (!jbd2_journal_check_available_features 4038dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4039b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4040b31e1552SEric Sandeen "requested data journaling mode"); 4041744692dcSJiaying Zhang goto failed_mount_wq; 4042ac27a0ecSDave Kleikamp } 4043ac27a0ecSDave Kleikamp default: 4044ac27a0ecSDave Kleikamp break; 4045ac27a0ecSDave Kleikamp } 4046ab04df78SJan Kara 4047ab04df78SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 4048ab04df78SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4049ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4050ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4051ab04df78SJan Kara goto failed_mount_wq; 4052ab04df78SJan Kara } 4053ab04df78SJan Kara 4054b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4055ac27a0ecSDave Kleikamp 405618aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 405718aadd47SBobi Jam 4058ce7e010aSTheodore Ts'o no_journal: 405982939d79SJan Kara sbi->s_mb_cache = ext4_xattr_create_cache(); 40609c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40619c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40629c191f70ST Makphaibulchoke goto failed_mount_wq; 40639c191f70ST Makphaibulchoke } 40649c191f70ST Makphaibulchoke 4065e2b911c5SDarrick J. Wong if ((DUMMY_ENCRYPTION_ENABLED(sbi) || ext4_has_feature_encrypt(sb)) && 406609cbfeafSKirill A. Shutemov (blocksize != PAGE_SIZE)) { 40671cb767cdSTheodore Ts'o ext4_msg(sb, KERN_ERR, 40681cb767cdSTheodore Ts'o "Unsupported blocksize for fs encryption"); 40691cb767cdSTheodore Ts'o goto failed_mount_wq; 40701cb767cdSTheodore Ts'o } 40711cb767cdSTheodore Ts'o 4072e2b911c5SDarrick J. Wong if (DUMMY_ENCRYPTION_ENABLED(sbi) && !(sb->s_flags & MS_RDONLY) && 4073e2b911c5SDarrick J. Wong !ext4_has_feature_encrypt(sb)) { 4074e2b911c5SDarrick J. Wong ext4_set_feature_encrypt(sb); 40756ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 40766ddb2447STheodore Ts'o } 40776ddb2447STheodore Ts'o 4078fd89d5f2STejun Heo /* 4079952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4080952fc18eSTheodore Ts'o * superblock if present. 4081952fc18eSTheodore Ts'o */ 4082952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4083952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4084952fc18eSTheodore Ts'o else { 408507aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 408607aa2ea1SLukas Czerner if (err) 4087952fc18eSTheodore Ts'o goto failed_mount_wq; 4088952fc18eSTheodore Ts'o } 4089952fc18eSTheodore Ts'o 4090952fc18eSTheodore Ts'o /* 4091fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4092fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4093fd89d5f2STejun Heo */ 40942e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40952e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40962e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40972e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 409807aa2ea1SLukas Czerner ret = -ENOMEM; 40992e8fa54eSJan Kara goto failed_mount4; 41002e8fa54eSJan Kara } 41012e8fa54eSJan Kara 4102ac27a0ecSDave Kleikamp /* 4103dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4104ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4105ac27a0ecSDave Kleikamp */ 4106ac27a0ecSDave Kleikamp 41071d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 41081d1fe1eeSDavid Howells if (IS_ERR(root)) { 4109b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 41101d1fe1eeSDavid Howells ret = PTR_ERR(root); 411132a9bb57SManish Katiyar root = NULL; 4112ac27a0ecSDave Kleikamp goto failed_mount4; 4113ac27a0ecSDave Kleikamp } 4114ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4115b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 411694bf608aSAl Viro iput(root); 4117ac27a0ecSDave Kleikamp goto failed_mount4; 4118ac27a0ecSDave Kleikamp } 411948fde701SAl Viro sb->s_root = d_make_root(root); 41201d1fe1eeSDavid Howells if (!sb->s_root) { 4121b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 41221d1fe1eeSDavid Howells ret = -ENOMEM; 41231d1fe1eeSDavid Howells goto failed_mount4; 41241d1fe1eeSDavid Howells } 4125ac27a0ecSDave Kleikamp 41267e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 41277e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4128ef7f3835SKalpak Shah 4129ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4130670e9875STheodore Ts'o if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE && 4131670e9875STheodore Ts'o sbi->s_want_extra_isize == 0) { 4132ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4133ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4134e2b911c5SDarrick J. Wong if (ext4_has_feature_extra_isize(sb)) { 4135ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4136ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4137ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4138ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4139ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4140ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4141ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4142ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4143ef7f3835SKalpak Shah } 4144ef7f3835SKalpak Shah } 4145ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4146ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4147ef7f3835SKalpak Shah sbi->s_inode_size) { 4148ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4149ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4150b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4151b31e1552SEric Sandeen "available"); 4152ef7f3835SKalpak Shah } 4153ef7f3835SKalpak Shah 4154b5799018STheodore Ts'o ext4_set_resv_clusters(sb); 415527dd4385SLukas Czerner 41566fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41576fd058f7STheodore Ts'o if (err) { 4158b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4159fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4160f9ae9cf5STheodore Ts'o goto failed_mount4a; 4161f9ae9cf5STheodore Ts'o } 4162f9ae9cf5STheodore Ts'o 4163f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4164f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4165f9ae9cf5STheodore Ts'o if (err) { 4166f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4167f9ae9cf5STheodore Ts'o err); 4168dcf2d804STao Ma goto failed_mount5; 4169c2774d84SAneesh Kumar K.V } 4170c2774d84SAneesh Kumar K.V 4171d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4172d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4173d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4174908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4175908c7f19STejun Heo GFP_KERNEL); 4176d5e03cbbSTheodore Ts'o if (!err) { 4177d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4178d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4179908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4180908c7f19STejun Heo GFP_KERNEL); 4181d5e03cbbSTheodore Ts'o } 4182d5e03cbbSTheodore Ts'o if (!err) 4183d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4184908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4185d5e03cbbSTheodore Ts'o if (!err) 4186908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4187908c7f19STejun Heo GFP_KERNEL); 4188c8585c6fSDaeho Jeong if (!err) 4189c8585c6fSDaeho Jeong err = percpu_init_rwsem(&sbi->s_journal_flag_rwsem); 4190c8585c6fSDaeho Jeong 4191d5e03cbbSTheodore Ts'o if (err) { 4192d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4193d5e03cbbSTheodore Ts'o goto failed_mount6; 4194d5e03cbbSTheodore Ts'o } 4195d5e03cbbSTheodore Ts'o 4196e2b911c5SDarrick J. Wong if (ext4_has_feature_flex_bg(sb)) 4197d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4198d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4199d5e03cbbSTheodore Ts'o "unable to initialize " 4200d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4201d5e03cbbSTheodore Ts'o goto failed_mount6; 4202d5e03cbbSTheodore Ts'o } 4203d5e03cbbSTheodore Ts'o 4204bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4205bfff6873SLukas Czerner if (err) 4206dcf2d804STao Ma goto failed_mount6; 4207bfff6873SLukas Czerner 4208b5799018STheodore Ts'o err = ext4_register_sysfs(sb); 4209dcf2d804STao Ma if (err) 4210dcf2d804STao Ma goto failed_mount7; 42113197ebdbSTheodore Ts'o 42129b2ff357SJan Kara #ifdef CONFIG_QUOTA 42139b2ff357SJan Kara /* Enable quota usage during mount. */ 4214e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) && !(sb->s_flags & MS_RDONLY)) { 42159b2ff357SJan Kara err = ext4_enable_quotas(sb); 42169b2ff357SJan Kara if (err) 42179b2ff357SJan Kara goto failed_mount8; 42189b2ff357SJan Kara } 42199b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 42209b2ff357SJan Kara 4221617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4222617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4223617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 42240390131bSFrank Mayhar if (needs_recovery) { 4225b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4226617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 42270390131bSFrank Mayhar } 42280390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 42290390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 42300390131bSFrank Mayhar descr = " journalled data mode"; 42310390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 42320390131bSFrank Mayhar descr = " ordered data mode"; 42330390131bSFrank Mayhar else 42340390131bSFrank Mayhar descr = " writeback data mode"; 42350390131bSFrank Mayhar } else 42360390131bSFrank Mayhar descr = "out journal"; 42370390131bSFrank Mayhar 423879add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 423979add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 424079add3a3SLukas Czerner if (!blk_queue_discard(q)) 424179add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 424279add3a3SLukas Czerner "mounting with \"discard\" option, but " 424379add3a3SLukas Czerner "the device does not support discard"); 424479add3a3SLukas Czerner } 424579add3a3SLukas Czerner 4246e294a537STheodore Ts'o if (___ratelimit(&ext4_mount_msg_ratelimit, "EXT4-fs mount")) 4247d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 42485aee0f8aSTheodore Ts'o "Opts: %.*s%s%s", descr, 42495aee0f8aSTheodore Ts'o (int) sizeof(sbi->s_es->s_mount_opts), 42505aee0f8aSTheodore Ts'o sbi->s_es->s_mount_opts, 42518b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4252ac27a0ecSDave Kleikamp 425366e61a9eSTheodore Ts'o if (es->s_error_count) 425466e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4255ac27a0ecSDave Kleikamp 4256efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4257efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4258efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4259efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4260efbed4dcSTheodore Ts'o 4261d4c402d9SCurt Wohlgemuth kfree(orig_data); 4262ac27a0ecSDave Kleikamp return 0; 4263ac27a0ecSDave Kleikamp 4264617ba13bSMingming Cao cantfind_ext4: 4265ac27a0ecSDave Kleikamp if (!silent) 4266b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4267ac27a0ecSDave Kleikamp goto failed_mount; 4268ac27a0ecSDave Kleikamp 426972ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 427072ba7450STheodore Ts'o failed_mount8: 4271ebd173beSTheodore Ts'o ext4_unregister_sysfs(sb); 427272ba7450STheodore Ts'o #endif 4273dcf2d804STao Ma failed_mount7: 4274dcf2d804STao Ma ext4_unregister_li_request(sb); 4275dcf2d804STao Ma failed_mount6: 4276f9ae9cf5STheodore Ts'o ext4_mb_release(sb); 4277d5e03cbbSTheodore Ts'o if (sbi->s_flex_groups) 4278b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 4279d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4280d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4281d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 4282d5e03cbbSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 428300764937SAzat Khuzhin failed_mount5: 4284f9ae9cf5STheodore Ts'o ext4_ext_release(sb); 4285f9ae9cf5STheodore Ts'o ext4_release_system_zone(sb); 4286f9ae9cf5STheodore Ts'o failed_mount4a: 428794bf608aSAl Viro dput(sb->s_root); 428832a9bb57SManish Katiyar sb->s_root = NULL; 428994bf608aSAl Viro failed_mount4: 4290b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 42912e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 42922e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 42934c0425ffSMingming Cao failed_mount_wq: 429482939d79SJan Kara if (sbi->s_mb_cache) { 429582939d79SJan Kara ext4_xattr_destroy_cache(sbi->s_mb_cache); 429682939d79SJan Kara sbi->s_mb_cache = NULL; 429782939d79SJan Kara } 42980390131bSFrank Mayhar if (sbi->s_journal) { 4299dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 430047b4a50bSJan Kara sbi->s_journal = NULL; 43010390131bSFrank Mayhar } 430250460fe8SDarrick J. Wong failed_mount3a: 4303d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4304eb68d0e2SZheng Liu failed_mount3: 43059105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4306c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4307c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4308ac27a0ecSDave Kleikamp failed_mount2: 4309ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4310ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4311b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4312ac27a0ecSDave Kleikamp failed_mount: 43130441984aSDarrick J. Wong if (sbi->s_chksum_driver) 43140441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4315ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4316a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 4317ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4318ac27a0ecSDave Kleikamp #endif 4319617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4320ac27a0ecSDave Kleikamp brelse(bh); 4321ac27a0ecSDave Kleikamp out_fail: 4322ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4323f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 43245aee0f8aSTheodore Ts'o out_free_base: 4325ac27a0ecSDave Kleikamp kfree(sbi); 4326d4c402d9SCurt Wohlgemuth kfree(orig_data); 432707aa2ea1SLukas Czerner return err ? err : ret; 4328ac27a0ecSDave Kleikamp } 4329ac27a0ecSDave Kleikamp 4330ac27a0ecSDave Kleikamp /* 4331ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4332ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4333ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4334ac27a0ecSDave Kleikamp */ 4335617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4336ac27a0ecSDave Kleikamp { 4337617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4338ac27a0ecSDave Kleikamp 4339ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 434030773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 434130773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4342ac27a0ecSDave Kleikamp 4343a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4344ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4345dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4346ac27a0ecSDave Kleikamp else 4347dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 43485bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 43495bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 43505bf5683aSHidehiro Kawai else 43515bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4352a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4353ac27a0ecSDave Kleikamp } 4354ac27a0ecSDave Kleikamp 4355c6cb7e77SEric Whitney static struct inode *ext4_get_journal_inode(struct super_block *sb, 4356ac27a0ecSDave Kleikamp unsigned int journal_inum) 4357ac27a0ecSDave Kleikamp { 4358ac27a0ecSDave Kleikamp struct inode *journal_inode; 4359ac27a0ecSDave Kleikamp 4360c6cb7e77SEric Whitney /* 4361c6cb7e77SEric Whitney * Test for the existence of a valid inode on disk. Bad things 4362c6cb7e77SEric Whitney * happen if we iget() an unused inode, as the subsequent iput() 4363c6cb7e77SEric Whitney * will try to delete it. 4364c6cb7e77SEric Whitney */ 43651d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43661d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4367b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4368ac27a0ecSDave Kleikamp return NULL; 4369ac27a0ecSDave Kleikamp } 4370ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4371ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4372ac27a0ecSDave Kleikamp iput(journal_inode); 4373b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4374ac27a0ecSDave Kleikamp return NULL; 4375ac27a0ecSDave Kleikamp } 4376ac27a0ecSDave Kleikamp 4377e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4378ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43791d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4380b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4381ac27a0ecSDave Kleikamp iput(journal_inode); 4382ac27a0ecSDave Kleikamp return NULL; 4383ac27a0ecSDave Kleikamp } 4384c6cb7e77SEric Whitney return journal_inode; 4385c6cb7e77SEric Whitney } 4386c6cb7e77SEric Whitney 4387c6cb7e77SEric Whitney static journal_t *ext4_get_journal(struct super_block *sb, 4388c6cb7e77SEric Whitney unsigned int journal_inum) 4389c6cb7e77SEric Whitney { 4390c6cb7e77SEric Whitney struct inode *journal_inode; 4391c6cb7e77SEric Whitney journal_t *journal; 4392c6cb7e77SEric Whitney 4393c6cb7e77SEric Whitney BUG_ON(!ext4_has_feature_journal(sb)); 4394c6cb7e77SEric Whitney 4395c6cb7e77SEric Whitney journal_inode = ext4_get_journal_inode(sb, journal_inum); 4396c6cb7e77SEric Whitney if (!journal_inode) 4397c6cb7e77SEric Whitney return NULL; 4398ac27a0ecSDave Kleikamp 4399dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4400ac27a0ecSDave Kleikamp if (!journal) { 4401b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4402ac27a0ecSDave Kleikamp iput(journal_inode); 4403ac27a0ecSDave Kleikamp return NULL; 4404ac27a0ecSDave Kleikamp } 4405ac27a0ecSDave Kleikamp journal->j_private = sb; 4406617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4407ac27a0ecSDave Kleikamp return journal; 4408ac27a0ecSDave Kleikamp } 4409ac27a0ecSDave Kleikamp 4410617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4411ac27a0ecSDave Kleikamp dev_t j_dev) 4412ac27a0ecSDave Kleikamp { 4413ac27a0ecSDave Kleikamp struct buffer_head *bh; 4414ac27a0ecSDave Kleikamp journal_t *journal; 4415617ba13bSMingming Cao ext4_fsblk_t start; 4416617ba13bSMingming Cao ext4_fsblk_t len; 4417ac27a0ecSDave Kleikamp int hblock, blocksize; 4418617ba13bSMingming Cao ext4_fsblk_t sb_block; 4419ac27a0ecSDave Kleikamp unsigned long offset; 4420617ba13bSMingming Cao struct ext4_super_block *es; 4421ac27a0ecSDave Kleikamp struct block_device *bdev; 4422ac27a0ecSDave Kleikamp 4423e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 44240390131bSFrank Mayhar 4425b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4426ac27a0ecSDave Kleikamp if (bdev == NULL) 4427ac27a0ecSDave Kleikamp return NULL; 4428ac27a0ecSDave Kleikamp 4429ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4430e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4431ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4432b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4433b31e1552SEric Sandeen "blocksize too small for journal device"); 4434ac27a0ecSDave Kleikamp goto out_bdev; 4435ac27a0ecSDave Kleikamp } 4436ac27a0ecSDave Kleikamp 4437617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4438617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4439ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4440ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4441b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4442b31e1552SEric Sandeen "external journal"); 4443ac27a0ecSDave Kleikamp goto out_bdev; 4444ac27a0ecSDave Kleikamp } 4445ac27a0ecSDave Kleikamp 44462716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4447617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4448ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4449617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4451b31e1552SEric Sandeen "bad superblock"); 4452ac27a0ecSDave Kleikamp brelse(bh); 4453ac27a0ecSDave Kleikamp goto out_bdev; 4454ac27a0ecSDave Kleikamp } 4455ac27a0ecSDave Kleikamp 4456df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4457df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4458df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4459df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4460df4763beSDarrick J. Wong "corrupt superblock"); 4461df4763beSDarrick J. Wong brelse(bh); 4462df4763beSDarrick J. Wong goto out_bdev; 4463df4763beSDarrick J. Wong } 4464df4763beSDarrick J. Wong 4465617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4466b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4467ac27a0ecSDave Kleikamp brelse(bh); 4468ac27a0ecSDave Kleikamp goto out_bdev; 4469ac27a0ecSDave Kleikamp } 4470ac27a0ecSDave Kleikamp 4471bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4472ac27a0ecSDave Kleikamp start = sb_block + 1; 4473ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4474ac27a0ecSDave Kleikamp 4475dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4476ac27a0ecSDave Kleikamp start, len, blocksize); 4477ac27a0ecSDave Kleikamp if (!journal) { 4478b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4479ac27a0ecSDave Kleikamp goto out_bdev; 4480ac27a0ecSDave Kleikamp } 4481ac27a0ecSDave Kleikamp journal->j_private = sb; 4482dfec8a14SMike Christie ll_rw_block(REQ_OP_READ, REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4483ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4484ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4485b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4486ac27a0ecSDave Kleikamp goto out_journal; 4487ac27a0ecSDave Kleikamp } 4488ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4489b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4490b31e1552SEric Sandeen "user (unsupported) - %d", 4491ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4492ac27a0ecSDave Kleikamp goto out_journal; 4493ac27a0ecSDave Kleikamp } 4494617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4495617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4496ac27a0ecSDave Kleikamp return journal; 44970b8e58a1SAndreas Dilger 4498ac27a0ecSDave Kleikamp out_journal: 4499dab291afSMingming Cao jbd2_journal_destroy(journal); 4500ac27a0ecSDave Kleikamp out_bdev: 4501617ba13bSMingming Cao ext4_blkdev_put(bdev); 4502ac27a0ecSDave Kleikamp return NULL; 4503ac27a0ecSDave Kleikamp } 4504ac27a0ecSDave Kleikamp 4505617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4506617ba13bSMingming Cao struct ext4_super_block *es, 4507ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4508ac27a0ecSDave Kleikamp { 4509ac27a0ecSDave Kleikamp journal_t *journal; 4510ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4511ac27a0ecSDave Kleikamp dev_t journal_dev; 4512ac27a0ecSDave Kleikamp int err = 0; 4513ac27a0ecSDave Kleikamp int really_read_only; 4514ac27a0ecSDave Kleikamp 4515e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 45160390131bSFrank Mayhar 4517ac27a0ecSDave Kleikamp if (journal_devnum && 4518ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4519b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4520b31e1552SEric Sandeen "numbers have changed"); 4521ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4522ac27a0ecSDave Kleikamp } else 4523ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4524ac27a0ecSDave Kleikamp 4525ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4526ac27a0ecSDave Kleikamp 4527ac27a0ecSDave Kleikamp /* 4528ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4529ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4530ac27a0ecSDave Kleikamp * can get read-write access to the device. 4531ac27a0ecSDave Kleikamp */ 4532e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb)) { 4533ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4534b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4535b31e1552SEric Sandeen "required on readonly filesystem"); 4536ac27a0ecSDave Kleikamp if (really_read_only) { 4537b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4538b31e1552SEric Sandeen "unavailable, cannot proceed"); 4539ac27a0ecSDave Kleikamp return -EROFS; 4540ac27a0ecSDave Kleikamp } 4541b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4542b31e1552SEric Sandeen "be enabled during recovery"); 4543ac27a0ecSDave Kleikamp } 4544ac27a0ecSDave Kleikamp } 4545ac27a0ecSDave Kleikamp 4546ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4547b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4548b31e1552SEric Sandeen "and inode journals!"); 4549ac27a0ecSDave Kleikamp return -EINVAL; 4550ac27a0ecSDave Kleikamp } 4551ac27a0ecSDave Kleikamp 4552ac27a0ecSDave Kleikamp if (journal_inum) { 4553617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4554ac27a0ecSDave Kleikamp return -EINVAL; 4555ac27a0ecSDave Kleikamp } else { 4556617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4557ac27a0ecSDave Kleikamp return -EINVAL; 4558ac27a0ecSDave Kleikamp } 4559ac27a0ecSDave Kleikamp 456090576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4561b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 45624776004fSTheodore Ts'o 4563e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal_needs_recovery(sb)) 4564dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45651c13d5c0STheodore Ts'o if (!err) { 45661c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45671c13d5c0STheodore Ts'o if (save) 45681c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45691c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4570dab291afSMingming Cao err = jbd2_journal_load(journal); 45711c13d5c0STheodore Ts'o if (save) 45721c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45731c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45741c13d5c0STheodore Ts'o kfree(save); 45751c13d5c0STheodore Ts'o } 4576ac27a0ecSDave Kleikamp 4577ac27a0ecSDave Kleikamp if (err) { 4578b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4579dab291afSMingming Cao jbd2_journal_destroy(journal); 4580ac27a0ecSDave Kleikamp return err; 4581ac27a0ecSDave Kleikamp } 4582ac27a0ecSDave Kleikamp 4583617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4584617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4585ac27a0ecSDave Kleikamp 4586c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4587ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4588ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4589ac27a0ecSDave Kleikamp 4590ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4591e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4592ac27a0ecSDave Kleikamp } 4593ac27a0ecSDave Kleikamp 4594ac27a0ecSDave Kleikamp return 0; 4595ac27a0ecSDave Kleikamp } 4596ac27a0ecSDave Kleikamp 4597e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4598ac27a0ecSDave Kleikamp { 4599e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4600617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4601c4be0c1dSTakashi Sato int error = 0; 4602ac27a0ecSDave Kleikamp 4603bdfe0cbdSTheodore Ts'o if (!sbh || block_device_ejected(sb)) 4604c4be0c1dSTakashi Sato return error; 460571290b36STheodore Ts'o /* 460671290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 460771290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 460871290b36STheodore Ts'o * write time when we are mounting the root file system 460971290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 461071290b36STheodore Ts'o * for people who are east of GMT and who make their clock 461171290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 461271290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 461371290b36STheodore Ts'o * to complain and force a full file system check. 461471290b36STheodore Ts'o */ 461571290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4616ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4617f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4618afc32f7eSTheodore Ts'o es->s_kbytes_written = 4619afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4620afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4621afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4622f613dfcbSTheodore Ts'o else 4623f613dfcbSTheodore Ts'o es->s_kbytes_written = 4624f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4625d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 462657042651STheodore Ts'o ext4_free_blocks_count_set(es, 462757042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 462857042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4629d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 46307f93cff9STheodore Ts'o es->s_free_inodes_count = 46317f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 46325d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4633ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 463406db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 46351566a48aSTheodore Ts'o if (sync) 46364743f839SPranay Kr. Srivastava lock_buffer(sbh); 46374743f839SPranay Kr. Srivastava if (buffer_write_io_error(sbh)) { 46384743f839SPranay Kr. Srivastava /* 46394743f839SPranay Kr. Srivastava * Oh, dear. A previous attempt to write the 46404743f839SPranay Kr. Srivastava * superblock failed. This could happen because the 46414743f839SPranay Kr. Srivastava * USB device was yanked out. Or it could happen to 46424743f839SPranay Kr. Srivastava * be a transient write error and maybe the block will 46434743f839SPranay Kr. Srivastava * be remapped. Nothing we can do but to retry the 46444743f839SPranay Kr. Srivastava * write and hope for the best. 46454743f839SPranay Kr. Srivastava */ 46464743f839SPranay Kr. Srivastava ext4_msg(sb, KERN_ERR, "previous I/O error to " 46474743f839SPranay Kr. Srivastava "superblock detected"); 46484743f839SPranay Kr. Srivastava clear_buffer_write_io_error(sbh); 46494743f839SPranay Kr. Srivastava set_buffer_uptodate(sbh); 46504743f839SPranay Kr. Srivastava } 4651ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4652914258bfSTheodore Ts'o if (sync) { 46531566a48aSTheodore Ts'o unlock_buffer(sbh); 4654564bc402SDaeho Jeong error = __sync_dirty_buffer(sbh, 465570fd7614SChristoph Hellwig test_opt(sb, BARRIER) ? REQ_FUA : REQ_SYNC); 4656c4be0c1dSTakashi Sato if (error) 4657c4be0c1dSTakashi Sato return error; 4658c4be0c1dSTakashi Sato 4659c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4660c4be0c1dSTakashi Sato if (error) { 4661b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4662b31e1552SEric Sandeen "superblock"); 4663914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4664914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4665914258bfSTheodore Ts'o } 4666914258bfSTheodore Ts'o } 4667c4be0c1dSTakashi Sato return error; 4668ac27a0ecSDave Kleikamp } 4669ac27a0ecSDave Kleikamp 4670ac27a0ecSDave Kleikamp /* 4671ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4672ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4673ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4674ac27a0ecSDave Kleikamp */ 4675617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4676617ba13bSMingming Cao struct ext4_super_block *es) 4677ac27a0ecSDave Kleikamp { 4678617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4679ac27a0ecSDave Kleikamp 4680e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) { 46810390131bSFrank Mayhar BUG_ON(journal != NULL); 46820390131bSFrank Mayhar return; 46830390131bSFrank Mayhar } 4684dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46857ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46867ffe1ea8SHidehiro Kawai goto out; 46877ffe1ea8SHidehiro Kawai 4688e2b911c5SDarrick J. Wong if (ext4_has_feature_journal_needs_recovery(sb) && 4689ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4690e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4691e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4692ac27a0ecSDave Kleikamp } 46937ffe1ea8SHidehiro Kawai 46947ffe1ea8SHidehiro Kawai out: 4695dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4696ac27a0ecSDave Kleikamp } 4697ac27a0ecSDave Kleikamp 4698ac27a0ecSDave Kleikamp /* 4699ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4700ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4701ac27a0ecSDave Kleikamp * main filesystem now. 4702ac27a0ecSDave Kleikamp */ 4703617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4704617ba13bSMingming Cao struct ext4_super_block *es) 4705ac27a0ecSDave Kleikamp { 4706ac27a0ecSDave Kleikamp journal_t *journal; 4707ac27a0ecSDave Kleikamp int j_errno; 4708ac27a0ecSDave Kleikamp const char *errstr; 4709ac27a0ecSDave Kleikamp 4710e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_journal(sb)); 47110390131bSFrank Mayhar 4712617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4713ac27a0ecSDave Kleikamp 4714ac27a0ecSDave Kleikamp /* 4715ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4716617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4717ac27a0ecSDave Kleikamp */ 4718ac27a0ecSDave Kleikamp 4719dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4720ac27a0ecSDave Kleikamp if (j_errno) { 4721ac27a0ecSDave Kleikamp char nbuf[16]; 4722ac27a0ecSDave Kleikamp 4723617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 472412062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4725ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 472612062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4727ac27a0ecSDave Kleikamp 4728617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4729617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4730e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4731ac27a0ecSDave Kleikamp 4732dab291afSMingming Cao jbd2_journal_clear_err(journal); 4733d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4734ac27a0ecSDave Kleikamp } 4735ac27a0ecSDave Kleikamp } 4736ac27a0ecSDave Kleikamp 4737ac27a0ecSDave Kleikamp /* 4738ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4739ac27a0ecSDave Kleikamp * and wait on the commit. 4740ac27a0ecSDave Kleikamp */ 4741617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4742ac27a0ecSDave Kleikamp { 4743ac27a0ecSDave Kleikamp journal_t *journal; 4744ac27a0ecSDave Kleikamp 4745ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4746ac27a0ecSDave Kleikamp return 0; 4747ac27a0ecSDave Kleikamp 4748617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4749b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4750ac27a0ecSDave Kleikamp } 4751ac27a0ecSDave Kleikamp 4752617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4753ac27a0ecSDave Kleikamp { 475414ce0cb4STheodore Ts'o int ret = 0; 47559eddacf9SJan Kara tid_t target; 475606a407f1SDmitry Monakhov bool needs_barrier = false; 47578d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4758ac27a0ecSDave Kleikamp 47590db1ff22STheodore Ts'o if (unlikely(ext4_forced_shutdown(EXT4_SB(sb)))) 47600db1ff22STheodore Ts'o return 0; 47610db1ff22STheodore Ts'o 47629bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 47632e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4764a1177825SJan Kara /* 4765a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4766a1177825SJan Kara * no dirty dquots 4767a1177825SJan Kara */ 4768a1177825SJan Kara dquot_writeback_dquots(sb, -1); 476906a407f1SDmitry Monakhov /* 477006a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 477106a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 477206a407f1SDmitry Monakhov * transaction_commit will do it for us. 477306a407f1SDmitry Monakhov */ 4774bda32530STheodore Ts'o if (sbi->s_journal) { 477506a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 477606a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 477706a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 477806a407f1SDmitry Monakhov needs_barrier = true; 477906a407f1SDmitry Monakhov 47808d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4781ac27a0ecSDave Kleikamp if (wait) 4782bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4783bda32530STheodore Ts'o target); 47840390131bSFrank Mayhar } 4785bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4786bda32530STheodore Ts'o needs_barrier = true; 478706a407f1SDmitry Monakhov if (needs_barrier) { 478806a407f1SDmitry Monakhov int err; 478906a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 479006a407f1SDmitry Monakhov if (!ret) 479106a407f1SDmitry Monakhov ret = err; 479206a407f1SDmitry Monakhov } 479306a407f1SDmitry Monakhov 479406a407f1SDmitry Monakhov return ret; 479506a407f1SDmitry Monakhov } 479606a407f1SDmitry Monakhov 4797ac27a0ecSDave Kleikamp /* 4798ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4799ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4800be4f27d3SYongqiang Yang * 4801be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 48028e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 48038e8ad8a5SJan Kara * modifications. 4804ac27a0ecSDave Kleikamp */ 4805c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4806ac27a0ecSDave Kleikamp { 4807c4be0c1dSTakashi Sato int error = 0; 4808c4be0c1dSTakashi Sato journal_t *journal; 4809ac27a0ecSDave Kleikamp 48109ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48119ca92389STheodore Ts'o return 0; 48129ca92389STheodore Ts'o 4813c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4814ac27a0ecSDave Kleikamp 4815bb044576STheodore Ts'o if (journal) { 4816ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4817dab291afSMingming Cao jbd2_journal_lock_updates(journal); 48187ffe1ea8SHidehiro Kawai 48197ffe1ea8SHidehiro Kawai /* 4820bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4821bb044576STheodore Ts'o * flush the journal. 48227ffe1ea8SHidehiro Kawai */ 4823c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 48246b0310fbSEric Sandeen if (error < 0) 48256b0310fbSEric Sandeen goto out; 4826ac27a0ecSDave Kleikamp 4827ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4828e2b911c5SDarrick J. Wong ext4_clear_feature_journal_needs_recovery(sb); 4829c642dc9eSEric Sandeen } 4830c642dc9eSEric Sandeen 4831e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 48326b0310fbSEric Sandeen out: 4833bb044576STheodore Ts'o if (journal) 48348e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4835bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 48366b0310fbSEric Sandeen return error; 4837ac27a0ecSDave Kleikamp } 4838ac27a0ecSDave Kleikamp 4839ac27a0ecSDave Kleikamp /* 4840ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4841ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4842ac27a0ecSDave Kleikamp */ 4843c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4844ac27a0ecSDave Kleikamp { 4845783d9485STheodore Ts'o if ((sb->s_flags & MS_RDONLY) || ext4_forced_shutdown(EXT4_SB(sb))) 48469ca92389STheodore Ts'o return 0; 48479ca92389STheodore Ts'o 4848c642dc9eSEric Sandeen if (EXT4_SB(sb)->s_journal) { 48499ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4850e2b911c5SDarrick J. Wong ext4_set_feature_journal_needs_recovery(sb); 4851c642dc9eSEric Sandeen } 4852c642dc9eSEric Sandeen 4853e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4854c4be0c1dSTakashi Sato return 0; 4855ac27a0ecSDave Kleikamp } 4856ac27a0ecSDave Kleikamp 4857673c6100STheodore Ts'o /* 4858673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4859673c6100STheodore Ts'o */ 4860673c6100STheodore Ts'o struct ext4_mount_options { 4861673c6100STheodore Ts'o unsigned long s_mount_opt; 4862a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 486308cefc7aSEric W. Biederman kuid_t s_resuid; 486408cefc7aSEric W. Biederman kgid_t s_resgid; 4865673c6100STheodore Ts'o unsigned long s_commit_interval; 4866673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4867673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4868673c6100STheodore Ts'o int s_jquota_fmt; 4869a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4870673c6100STheodore Ts'o #endif 4871673c6100STheodore Ts'o }; 4872673c6100STheodore Ts'o 4873617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4874ac27a0ecSDave Kleikamp { 4875617ba13bSMingming Cao struct ext4_super_block *es; 4876617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4877ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4878617ba13bSMingming Cao struct ext4_mount_options old_opts; 4879c79d967dSChristoph Hellwig int enable_quota = 0; 48808a266467STheodore Ts'o ext4_group_t g; 4881b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4882c5e06d10SJohann Lombardi int err = 0; 4883ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 488403dafb5fSChen Gang int i, j; 4885ac27a0ecSDave Kleikamp #endif 4886d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4887ac27a0ecSDave Kleikamp 4888ac27a0ecSDave Kleikamp /* Store the original options */ 4889ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4890ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4891a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4892ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4893ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4894ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 489530773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 489630773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4897ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4898ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4899a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 490003dafb5fSChen Gang if (sbi->s_qf_names[i]) { 490103dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 490203dafb5fSChen Gang GFP_KERNEL); 490303dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 490403dafb5fSChen Gang for (j = 0; j < i; j++) 490503dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 49063e36a163SWei Yongjun kfree(orig_data); 490703dafb5fSChen Gang return -ENOMEM; 490803dafb5fSChen Gang } 490903dafb5fSChen Gang } else 491003dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4911ac27a0ecSDave Kleikamp #endif 4912b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4913b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4914ac27a0ecSDave Kleikamp 4915661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4916ac27a0ecSDave Kleikamp err = -EINVAL; 4917ac27a0ecSDave Kleikamp goto restore_opts; 4918ac27a0ecSDave Kleikamp } 4919ac27a0ecSDave Kleikamp 49206b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 49216b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 49226b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 49232d5b86e0SEric Sandeen "during remount not supported; ignoring"); 49242d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4925c6d3d56dSDarrick J. Wong } 4926c6d3d56dSDarrick J. Wong 49276ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 49286ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 49296ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49306ae6514bSPiotr Sarna "both data=journal and delalloc"); 49316ae6514bSPiotr Sarna err = -EINVAL; 49326ae6514bSPiotr Sarna goto restore_opts; 49336ae6514bSPiotr Sarna } 49346ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 49356ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49366ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 49376ae6514bSPiotr Sarna err = -EINVAL; 49386ae6514bSPiotr Sarna goto restore_opts; 49396ae6514bSPiotr Sarna } 4940923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4941923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4942923ae0ffSRoss Zwisler "both data=journal and dax"); 4943923ae0ffSRoss Zwisler err = -EINVAL; 4944923ae0ffSRoss Zwisler goto restore_opts; 4945923ae0ffSRoss Zwisler } 4946ab04df78SJan Kara } else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) { 4947ab04df78SJan Kara if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 4948ab04df78SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 4949ab04df78SJan Kara "journal_async_commit in data=ordered mode"); 4950ab04df78SJan Kara err = -EINVAL; 4951ab04df78SJan Kara goto restore_opts; 4952ab04df78SJan Kara } 4953923ae0ffSRoss Zwisler } 4954923ae0ffSRoss Zwisler 4955923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4956923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4957923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4958923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 49596ae6514bSPiotr Sarna } 49606ae6514bSPiotr Sarna 49614ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4962c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4963ac27a0ecSDave Kleikamp 4964ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4965482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4966ac27a0ecSDave Kleikamp 4967ac27a0ecSDave Kleikamp es = sbi->s_es; 4968ac27a0ecSDave Kleikamp 4969b3881f74STheodore Ts'o if (sbi->s_journal) { 4970617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4971b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4972b3881f74STheodore Ts'o } 4973ac27a0ecSDave Kleikamp 4974a2fd66d0STheodore Ts'o if (*flags & MS_LAZYTIME) 4975a2fd66d0STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 4976a2fd66d0STheodore Ts'o 4977661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 49784ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4979ac27a0ecSDave Kleikamp err = -EROFS; 4980ac27a0ecSDave Kleikamp goto restore_opts; 4981ac27a0ecSDave Kleikamp } 4982ac27a0ecSDave Kleikamp 4983ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 498438c03b34STheodore Ts'o err = sync_filesystem(sb); 498538c03b34STheodore Ts'o if (err < 0) 498638c03b34STheodore Ts'o goto restore_opts; 49870f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 49880f0dd62fSChristoph Hellwig if (err < 0) 4989c79d967dSChristoph Hellwig goto restore_opts; 4990c79d967dSChristoph Hellwig 4991ac27a0ecSDave Kleikamp /* 4992ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4993ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4994ac27a0ecSDave Kleikamp */ 4995ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4996ac27a0ecSDave Kleikamp 4997ac27a0ecSDave Kleikamp /* 4998ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4999ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 5000ac27a0ecSDave Kleikamp * mark the partition as valid again. 5001ac27a0ecSDave Kleikamp */ 5002617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 5003617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 5004ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 5005ac27a0ecSDave Kleikamp 5006a63c9eb2STheodore Ts'o if (sbi->s_journal) 5007617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 5008ac27a0ecSDave Kleikamp } else { 5009a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 5010e2b911c5SDarrick J. Wong if (ext4_has_feature_readonly(sb) || 50112cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 5012ac27a0ecSDave Kleikamp err = -EROFS; 5013ac27a0ecSDave Kleikamp goto restore_opts; 5014ac27a0ecSDave Kleikamp } 5015ead6596bSEric Sandeen /* 50168a266467STheodore Ts'o * Make sure the group descriptor checksums 50170b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 50188a266467STheodore Ts'o */ 50198a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 50208a266467STheodore Ts'o struct ext4_group_desc *gdp = 50218a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 50228a266467STheodore Ts'o 5023feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 5024b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 5025b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 5026e2b911c5SDarrick J. Wong g, le16_to_cpu(ext4_group_desc_csum(sb, g, gdp)), 50278a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 50286a797d27SDarrick J. Wong err = -EFSBADCRC; 50298a266467STheodore Ts'o goto restore_opts; 50308a266467STheodore Ts'o } 50318a266467STheodore Ts'o } 50328a266467STheodore Ts'o 50338a266467STheodore Ts'o /* 5034ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5035ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5036ead6596bSEric Sandeen * require a full umount/remount for now. 5037ead6596bSEric Sandeen */ 5038ead6596bSEric Sandeen if (es->s_last_orphan) { 5039b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5040ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5041ead6596bSEric Sandeen "orphan inode list. Please " 5042b31e1552SEric Sandeen "umount/remount instead"); 5043ead6596bSEric Sandeen err = -EINVAL; 5044ead6596bSEric Sandeen goto restore_opts; 5045ead6596bSEric Sandeen } 5046ead6596bSEric Sandeen 5047ac27a0ecSDave Kleikamp /* 5048ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5049ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5050ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5051ac27a0ecSDave Kleikamp * the partition.) 5052ac27a0ecSDave Kleikamp */ 50530390131bSFrank Mayhar if (sbi->s_journal) 5054617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5055ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5056617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 5057ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 5058e2b911c5SDarrick J. Wong if (ext4_has_feature_mmp(sb)) 5059c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5060c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5061c5e06d10SJohann Lombardi err = -EROFS; 5062c5e06d10SJohann Lombardi goto restore_opts; 5063c5e06d10SJohann Lombardi } 5064c79d967dSChristoph Hellwig enable_quota = 1; 5065ac27a0ecSDave Kleikamp } 5066ac27a0ecSDave Kleikamp } 5067bfff6873SLukas Czerner 5068bfff6873SLukas Czerner /* 5069bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5070bfff6873SLukas Czerner * current settings 5071bfff6873SLukas Czerner */ 5072bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 5073bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5074bfff6873SLukas Czerner else { 5075bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5076bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5077bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5078bfff6873SLukas Czerner } 5079bfff6873SLukas Czerner 50806fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5081d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 5082e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 50830390131bSFrank Mayhar 5084ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5085ac27a0ecSDave Kleikamp /* Release old quota file names */ 5086a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5087ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 50887c319d32SAditya Kali if (enable_quota) { 50897c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 50900f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 5091e2b911c5SDarrick J. Wong else if (ext4_has_feature_quota(sb)) { 50927c319d32SAditya Kali err = ext4_enable_quotas(sb); 509307724f98STheodore Ts'o if (err) 50947c319d32SAditya Kali goto restore_opts; 50957c319d32SAditya Kali } 50967c319d32SAditya Kali } 50977c319d32SAditya Kali #endif 5098d4c402d9SCurt Wohlgemuth 5099a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 5100d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5101d4c402d9SCurt Wohlgemuth kfree(orig_data); 5102ac27a0ecSDave Kleikamp return 0; 51030b8e58a1SAndreas Dilger 5104ac27a0ecSDave Kleikamp restore_opts: 5105ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5106ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5107a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5108ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5109ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5110ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 511130773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 511230773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5113ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5114ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5115a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5116ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5117ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5118ac27a0ecSDave Kleikamp } 5119ac27a0ecSDave Kleikamp #endif 5120d4c402d9SCurt Wohlgemuth kfree(orig_data); 5121ac27a0ecSDave Kleikamp return err; 5122ac27a0ecSDave Kleikamp } 5123ac27a0ecSDave Kleikamp 5124689c958cSLi Xi #ifdef CONFIG_QUOTA 5125689c958cSLi Xi static int ext4_statfs_project(struct super_block *sb, 5126689c958cSLi Xi kprojid_t projid, struct kstatfs *buf) 5127689c958cSLi Xi { 5128689c958cSLi Xi struct kqid qid; 5129689c958cSLi Xi struct dquot *dquot; 5130689c958cSLi Xi u64 limit; 5131689c958cSLi Xi u64 curblock; 5132689c958cSLi Xi 5133689c958cSLi Xi qid = make_kqid_projid(projid); 5134689c958cSLi Xi dquot = dqget(sb, qid); 5135689c958cSLi Xi if (IS_ERR(dquot)) 5136689c958cSLi Xi return PTR_ERR(dquot); 5137689c958cSLi Xi spin_lock(&dq_data_lock); 5138689c958cSLi Xi 5139689c958cSLi Xi limit = (dquot->dq_dqb.dqb_bsoftlimit ? 5140689c958cSLi Xi dquot->dq_dqb.dqb_bsoftlimit : 5141689c958cSLi Xi dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; 5142689c958cSLi Xi if (limit && buf->f_blocks > limit) { 5143689c958cSLi Xi curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; 5144689c958cSLi Xi buf->f_blocks = limit; 5145689c958cSLi Xi buf->f_bfree = buf->f_bavail = 5146689c958cSLi Xi (buf->f_blocks > curblock) ? 5147689c958cSLi Xi (buf->f_blocks - curblock) : 0; 5148689c958cSLi Xi } 5149689c958cSLi Xi 5150689c958cSLi Xi limit = dquot->dq_dqb.dqb_isoftlimit ? 5151689c958cSLi Xi dquot->dq_dqb.dqb_isoftlimit : 5152689c958cSLi Xi dquot->dq_dqb.dqb_ihardlimit; 5153689c958cSLi Xi if (limit && buf->f_files > limit) { 5154689c958cSLi Xi buf->f_files = limit; 5155689c958cSLi Xi buf->f_ffree = 5156689c958cSLi Xi (buf->f_files > dquot->dq_dqb.dqb_curinodes) ? 5157689c958cSLi Xi (buf->f_files - dquot->dq_dqb.dqb_curinodes) : 0; 5158689c958cSLi Xi } 5159689c958cSLi Xi 5160689c958cSLi Xi spin_unlock(&dq_data_lock); 5161689c958cSLi Xi dqput(dquot); 5162689c958cSLi Xi return 0; 5163689c958cSLi Xi } 5164689c958cSLi Xi #endif 5165689c958cSLi Xi 5166617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5167ac27a0ecSDave Kleikamp { 5168ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5169617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5170617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 517127dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5172960cc398SPekka Enberg u64 fsid; 5173d02a9391SKazuya Mio s64 bfree; 517427dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5175ac27a0ecSDave Kleikamp 5176952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5177952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5178ac27a0ecSDave Kleikamp 5179617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5180ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5181b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 518257042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 518357042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5184d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 518557042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 518627dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 518727dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 518827dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5189ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5190ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 519152d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5192617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5193960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5194960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5195960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5196960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 51970b8e58a1SAndreas Dilger 5198689c958cSLi Xi #ifdef CONFIG_QUOTA 5199689c958cSLi Xi if (ext4_test_inode_flag(dentry->d_inode, EXT4_INODE_PROJINHERIT) && 5200689c958cSLi Xi sb_has_quota_limits_enabled(sb, PRJQUOTA)) 5201689c958cSLi Xi ext4_statfs_project(sb, EXT4_I(dentry->d_inode)->i_projid, buf); 5202689c958cSLi Xi #endif 5203ac27a0ecSDave Kleikamp return 0; 5204ac27a0ecSDave Kleikamp } 5205ac27a0ecSDave Kleikamp 52060b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 52070b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5208ac27a0ecSDave Kleikamp * Process 1 Process 2 5209617ba13bSMingming Cao * ext4_create() quota_sync() 5210dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5211871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5212dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5213ac27a0ecSDave Kleikamp * 5214ac27a0ecSDave Kleikamp */ 5215ac27a0ecSDave Kleikamp 5216ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5217ac27a0ecSDave Kleikamp 5218ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5219ac27a0ecSDave Kleikamp { 52204c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5221ac27a0ecSDave Kleikamp } 5222ac27a0ecSDave Kleikamp 5223617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5224ac27a0ecSDave Kleikamp { 5225ac27a0ecSDave Kleikamp int ret, err; 5226ac27a0ecSDave Kleikamp handle_t *handle; 5227ac27a0ecSDave Kleikamp struct inode *inode; 5228ac27a0ecSDave Kleikamp 5229ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 52309924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5231617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5232ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5233ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5234ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5235617ba13bSMingming Cao err = ext4_journal_stop(handle); 5236ac27a0ecSDave Kleikamp if (!ret) 5237ac27a0ecSDave Kleikamp ret = err; 5238ac27a0ecSDave Kleikamp return ret; 5239ac27a0ecSDave Kleikamp } 5240ac27a0ecSDave Kleikamp 5241617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5242ac27a0ecSDave Kleikamp { 5243ac27a0ecSDave Kleikamp int ret, err; 5244ac27a0ecSDave Kleikamp handle_t *handle; 5245ac27a0ecSDave Kleikamp 52469924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5247617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5248ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5249ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5250ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5251617ba13bSMingming Cao err = ext4_journal_stop(handle); 5252ac27a0ecSDave Kleikamp if (!ret) 5253ac27a0ecSDave Kleikamp ret = err; 5254ac27a0ecSDave Kleikamp return ret; 5255ac27a0ecSDave Kleikamp } 5256ac27a0ecSDave Kleikamp 5257617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5258ac27a0ecSDave Kleikamp { 5259ac27a0ecSDave Kleikamp int ret, err; 5260ac27a0ecSDave Kleikamp handle_t *handle; 5261ac27a0ecSDave Kleikamp 52629924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5263617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 52649c3013e9SJan Kara if (IS_ERR(handle)) { 52659c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 52669c3013e9SJan Kara dquot_release(dquot); 5267ac27a0ecSDave Kleikamp return PTR_ERR(handle); 52689c3013e9SJan Kara } 5269ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5270617ba13bSMingming Cao err = ext4_journal_stop(handle); 5271ac27a0ecSDave Kleikamp if (!ret) 5272ac27a0ecSDave Kleikamp ret = err; 5273ac27a0ecSDave Kleikamp return ret; 5274ac27a0ecSDave Kleikamp } 5275ac27a0ecSDave Kleikamp 5276617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5277ac27a0ecSDave Kleikamp { 5278262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5279262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5280262b4662SJan Kara 52812c8be6b2SJan Kara /* Are we journaling quotas? */ 5282e2b911c5SDarrick J. Wong if (ext4_has_feature_quota(sb) || 5283262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5284ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5285617ba13bSMingming Cao return ext4_write_dquot(dquot); 5286ac27a0ecSDave Kleikamp } else { 5287ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5288ac27a0ecSDave Kleikamp } 5289ac27a0ecSDave Kleikamp } 5290ac27a0ecSDave Kleikamp 5291617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5292ac27a0ecSDave Kleikamp { 5293ac27a0ecSDave Kleikamp int ret, err; 5294ac27a0ecSDave Kleikamp handle_t *handle; 5295ac27a0ecSDave Kleikamp 5296ac27a0ecSDave Kleikamp /* Data block + inode block */ 52972b0143b5SDavid Howells handle = ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2); 5298ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5299ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5300ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5301617ba13bSMingming Cao err = ext4_journal_stop(handle); 5302ac27a0ecSDave Kleikamp if (!ret) 5303ac27a0ecSDave Kleikamp ret = err; 5304ac27a0ecSDave Kleikamp return ret; 5305ac27a0ecSDave Kleikamp } 5306ac27a0ecSDave Kleikamp 5307ac27a0ecSDave Kleikamp /* 5308ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5309ac27a0ecSDave Kleikamp * the quota file and such... 5310ac27a0ecSDave Kleikamp */ 5311617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5312ac27a0ecSDave Kleikamp { 5313287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5314617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5315ac27a0ecSDave Kleikamp } 5316ac27a0ecSDave Kleikamp 5317daf647d2STheodore Ts'o static void lockdep_set_quota_inode(struct inode *inode, int subclass) 5318daf647d2STheodore Ts'o { 5319daf647d2STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 5320daf647d2STheodore Ts'o 5321daf647d2STheodore Ts'o /* The first argument of lockdep_set_subclass has to be 5322daf647d2STheodore Ts'o * *exactly* the same as the argument to init_rwsem() --- in 5323daf647d2STheodore Ts'o * this case, in init_once() --- or lockdep gets unhappy 5324daf647d2STheodore Ts'o * because the name of the lock is set using the 5325daf647d2STheodore Ts'o * stringification of the argument to init_rwsem(). 5326daf647d2STheodore Ts'o */ 5327daf647d2STheodore Ts'o (void) ei; /* shut up clang warning if !CONFIG_LOCKDEP */ 5328daf647d2STheodore Ts'o lockdep_set_subclass(&ei->i_data_sem, subclass); 5329daf647d2STheodore Ts'o } 5330daf647d2STheodore Ts'o 5331ac27a0ecSDave Kleikamp /* 5332ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5333ac27a0ecSDave Kleikamp */ 5334617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 53358c54ca9cSAl Viro const struct path *path) 5336ac27a0ecSDave Kleikamp { 5337ac27a0ecSDave Kleikamp int err; 5338ac27a0ecSDave Kleikamp 5339ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5340ac27a0ecSDave Kleikamp return -EINVAL; 53410623543bSJan Kara 5342ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5343d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5344ac27a0ecSDave Kleikamp return -EXDEV; 53450623543bSJan Kara /* Journaling quota? */ 53460623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 53472b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5348f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5349b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5350b31e1552SEric Sandeen "Quota file not on filesystem root. " 5351b31e1552SEric Sandeen "Journaled quota will not work"); 53520623543bSJan Kara } 53530623543bSJan Kara 53540623543bSJan Kara /* 53550623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 53560623543bSJan Kara * all updates to the file when we bypass pagecache... 53570623543bSJan Kara */ 53580390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 53592b0143b5SDavid Howells ext4_should_journal_data(d_inode(path->dentry))) { 53600623543bSJan Kara /* 53610623543bSJan Kara * We don't need to lock updates but journal_flush() could 53620623543bSJan Kara * otherwise be livelocked... 53630623543bSJan Kara */ 53640623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 53657ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 53660623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5367f00c9e44SJan Kara if (err) 53687ffe1ea8SHidehiro Kawai return err; 53697ffe1ea8SHidehiro Kawai } 5370957153fcSJan Kara 5371daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, I_DATA_SEM_QUOTA); 5372daf647d2STheodore Ts'o err = dquot_quota_on(sb, type, format_id, path); 5373957153fcSJan Kara if (err) { 5374daf647d2STheodore Ts'o lockdep_set_quota_inode(path->dentry->d_inode, 5375daf647d2STheodore Ts'o I_DATA_SEM_NORMAL); 5376957153fcSJan Kara } else { 5377957153fcSJan Kara struct inode *inode = d_inode(path->dentry); 5378957153fcSJan Kara handle_t *handle; 5379957153fcSJan Kara 5380*61a92987SJan Kara /* 5381*61a92987SJan Kara * Set inode flags to prevent userspace from messing with quota 5382*61a92987SJan Kara * files. If this fails, we return success anyway since quotas 5383*61a92987SJan Kara * are already enabled and this is not a hard failure. 5384*61a92987SJan Kara */ 5385957153fcSJan Kara inode_lock(inode); 5386957153fcSJan Kara handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 5387957153fcSJan Kara if (IS_ERR(handle)) 5388957153fcSJan Kara goto unlock_inode; 5389957153fcSJan Kara EXT4_I(inode)->i_flags |= EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL; 5390957153fcSJan Kara inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, 5391957153fcSJan Kara S_NOATIME | S_IMMUTABLE); 5392957153fcSJan Kara ext4_mark_inode_dirty(handle, inode); 5393957153fcSJan Kara ext4_journal_stop(handle); 5394957153fcSJan Kara unlock_inode: 5395957153fcSJan Kara inode_unlock(inode); 5396957153fcSJan Kara } 5397daf647d2STheodore Ts'o return err; 5398ac27a0ecSDave Kleikamp } 5399ac27a0ecSDave Kleikamp 54007c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 54017c319d32SAditya Kali unsigned int flags) 54027c319d32SAditya Kali { 54037c319d32SAditya Kali int err; 54047c319d32SAditya Kali struct inode *qf_inode; 5405a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 54067c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5407689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5408689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 54097c319d32SAditya Kali }; 54107c319d32SAditya Kali 5411e2b911c5SDarrick J. Wong BUG_ON(!ext4_has_feature_quota(sb)); 54127c319d32SAditya Kali 54137c319d32SAditya Kali if (!qf_inums[type]) 54147c319d32SAditya Kali return -EPERM; 54157c319d32SAditya Kali 54167c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 54177c319d32SAditya Kali if (IS_ERR(qf_inode)) { 54187c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 54197c319d32SAditya Kali return PTR_ERR(qf_inode); 54207c319d32SAditya Kali } 54217c319d32SAditya Kali 5422bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5423bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 5424daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_QUOTA); 54257c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 54267c319d32SAditya Kali iput(qf_inode); 5427daf647d2STheodore Ts'o if (err) 5428daf647d2STheodore Ts'o lockdep_set_quota_inode(qf_inode, I_DATA_SEM_NORMAL); 54297c319d32SAditya Kali 54307c319d32SAditya Kali return err; 54317c319d32SAditya Kali } 54327c319d32SAditya Kali 54337c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 54347c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 54357c319d32SAditya Kali { 54367c319d32SAditya Kali int type, err = 0; 5437a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 54387c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 5439689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum), 5440689c958cSLi Xi le32_to_cpu(EXT4_SB(sb)->s_es->s_prj_quota_inum) 54417c319d32SAditya Kali }; 544249da9392SJan Kara bool quota_mopt[EXT4_MAXQUOTAS] = { 544349da9392SJan Kara test_opt(sb, USRQUOTA), 544449da9392SJan Kara test_opt(sb, GRPQUOTA), 544549da9392SJan Kara test_opt(sb, PRJQUOTA), 544649da9392SJan Kara }; 54477c319d32SAditya Kali 54487c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5449a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 54507c319d32SAditya Kali if (qf_inums[type]) { 54517c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 545249da9392SJan Kara DQUOT_USAGE_ENABLED | 545349da9392SJan Kara (quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0)); 54547c319d32SAditya Kali if (err) { 54557c319d32SAditya Kali ext4_warning(sb, 545672ba7450STheodore Ts'o "Failed to enable quota tracking " 545772ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 545872ba7450STheodore Ts'o "e2fsck to fix.", type, err); 54597c319d32SAditya Kali return err; 54607c319d32SAditya Kali } 54617c319d32SAditya Kali } 54627c319d32SAditya Kali } 54637c319d32SAditya Kali return 0; 54647c319d32SAditya Kali } 54657c319d32SAditya Kali 5466ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5467ca0e05e4SDmitry Monakhov { 546821f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 546921f97697SJan Kara handle_t *handle; 5470957153fcSJan Kara int err; 547121f97697SJan Kara 547287009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 547387009d86SDmitry Monakhov * Caller already holds s_umount sem */ 547487009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5475ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5476ca0e05e4SDmitry Monakhov 5477957153fcSJan Kara if (!inode || !igrab(inode)) 54780b268590SAmir Goldstein goto out; 54790b268590SAmir Goldstein 5480957153fcSJan Kara err = dquot_quota_off(sb, type); 5481957153fcSJan Kara if (err) 5482957153fcSJan Kara goto out_put; 5483957153fcSJan Kara 5484957153fcSJan Kara inode_lock(inode); 5485*61a92987SJan Kara /* 5486*61a92987SJan Kara * Update modification times of quota files when userspace can 5487*61a92987SJan Kara * start looking at them. If we fail, we return success anyway since 5488*61a92987SJan Kara * this is not a hard failure and quotas are already disabled. 5489*61a92987SJan Kara */ 54909924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 549121f97697SJan Kara if (IS_ERR(handle)) 5492957153fcSJan Kara goto out_unlock; 5493957153fcSJan Kara EXT4_I(inode)->i_flags &= ~(EXT4_NOATIME_FL | EXT4_IMMUTABLE_FL); 5494957153fcSJan Kara inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); 5495eeca7ea1SDeepa Dinamani inode->i_mtime = inode->i_ctime = current_time(inode); 549621f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 549721f97697SJan Kara ext4_journal_stop(handle); 5498957153fcSJan Kara out_unlock: 5499957153fcSJan Kara inode_unlock(inode); 5500957153fcSJan Kara out_put: 5501957153fcSJan Kara iput(inode); 5502957153fcSJan Kara return err; 550321f97697SJan Kara out: 5504ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5505ca0e05e4SDmitry Monakhov } 5506ca0e05e4SDmitry Monakhov 5507ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5508ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5509ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5510ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5511617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5512ac27a0ecSDave Kleikamp size_t len, loff_t off) 5513ac27a0ecSDave Kleikamp { 5514ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5515725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5516ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5517ac27a0ecSDave Kleikamp int tocopy; 5518ac27a0ecSDave Kleikamp size_t toread; 5519ac27a0ecSDave Kleikamp struct buffer_head *bh; 5520ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5521ac27a0ecSDave Kleikamp 5522ac27a0ecSDave Kleikamp if (off > i_size) 5523ac27a0ecSDave Kleikamp return 0; 5524ac27a0ecSDave Kleikamp if (off+len > i_size) 5525ac27a0ecSDave Kleikamp len = i_size-off; 5526ac27a0ecSDave Kleikamp toread = len; 5527ac27a0ecSDave Kleikamp while (toread > 0) { 5528ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5529ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 55301c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 55311c215028STheodore Ts'o if (IS_ERR(bh)) 55321c215028STheodore Ts'o return PTR_ERR(bh); 5533ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5534ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5535ac27a0ecSDave Kleikamp else 5536ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5537ac27a0ecSDave Kleikamp brelse(bh); 5538ac27a0ecSDave Kleikamp offset = 0; 5539ac27a0ecSDave Kleikamp toread -= tocopy; 5540ac27a0ecSDave Kleikamp data += tocopy; 5541ac27a0ecSDave Kleikamp blk++; 5542ac27a0ecSDave Kleikamp } 5543ac27a0ecSDave Kleikamp return len; 5544ac27a0ecSDave Kleikamp } 5545ac27a0ecSDave Kleikamp 5546ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5547ac27a0ecSDave Kleikamp * enough credits) */ 5548617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5549ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5550ac27a0ecSDave Kleikamp { 5551ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5552725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 55531c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5554c5e298aeSTheodore Ts'o int retries = 0; 5555ac27a0ecSDave Kleikamp struct buffer_head *bh; 5556ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5557ac27a0ecSDave Kleikamp 55580390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5559b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5560b31e1552SEric Sandeen " cancelled because transaction is not started", 55619c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 55629c3013e9SJan Kara return -EIO; 55639c3013e9SJan Kara } 556467eeb568SDmitry Monakhov /* 556567eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 556667eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 556767eeb568SDmitry Monakhov */ 556867eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 556967eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 557067eeb568SDmitry Monakhov " cancelled because not block aligned", 557167eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 557267eeb568SDmitry Monakhov return -EIO; 557367eeb568SDmitry Monakhov } 557467eeb568SDmitry Monakhov 5575c5e298aeSTheodore Ts'o do { 5576c5e298aeSTheodore Ts'o bh = ext4_bread(handle, inode, blk, 5577c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_CREATE | 5578c5e298aeSTheodore Ts'o EXT4_GET_BLOCKS_METADATA_NOFAIL); 5579c5e298aeSTheodore Ts'o } while (IS_ERR(bh) && (PTR_ERR(bh) == -ENOSPC) && 5580c5e298aeSTheodore Ts'o ext4_should_retry_alloc(inode->i_sb, &retries)); 55811c215028STheodore Ts'o if (IS_ERR(bh)) 55821c215028STheodore Ts'o return PTR_ERR(bh); 5583ac27a0ecSDave Kleikamp if (!bh) 5584ac27a0ecSDave Kleikamp goto out; 55855d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5586617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5587ac27a0ecSDave Kleikamp if (err) { 5588ac27a0ecSDave Kleikamp brelse(bh); 55891c215028STheodore Ts'o return err; 5590ac27a0ecSDave Kleikamp } 5591ac27a0ecSDave Kleikamp lock_buffer(bh); 559267eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5593ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5594ac27a0ecSDave Kleikamp unlock_buffer(bh); 55950390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5596ac27a0ecSDave Kleikamp brelse(bh); 5597ac27a0ecSDave Kleikamp out: 559867eeb568SDmitry Monakhov if (inode->i_size < off + len) { 559967eeb568SDmitry Monakhov i_size_write(inode, off + len); 5600617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5601617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 560221f97697SJan Kara } 560367eeb568SDmitry Monakhov return len; 5604ac27a0ecSDave Kleikamp } 5605ac27a0ecSDave Kleikamp 56068f0e8746STheodore Ts'o static int ext4_get_next_id(struct super_block *sb, struct kqid *qid) 56078f0e8746STheodore Ts'o { 56088f0e8746STheodore Ts'o const struct quota_format_ops *ops; 56098f0e8746STheodore Ts'o 56108f0e8746STheodore Ts'o if (!sb_has_quota_loaded(sb, qid->type)) 56118f0e8746STheodore Ts'o return -ESRCH; 56128f0e8746STheodore Ts'o ops = sb_dqopt(sb)->ops[qid->type]; 56138f0e8746STheodore Ts'o if (!ops || !ops->get_next_id) 56148f0e8746STheodore Ts'o return -ENOSYS; 56158f0e8746STheodore Ts'o return dquot_get_next_id(sb, qid); 56168f0e8746STheodore Ts'o } 5617ac27a0ecSDave Kleikamp #endif 5618ac27a0ecSDave Kleikamp 5619152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5620152a0836SAl Viro const char *dev_name, void *data) 5621ac27a0ecSDave Kleikamp { 5622152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5623ac27a0ecSDave Kleikamp } 5624ac27a0ecSDave Kleikamp 5625c290ea01SJan Kara #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT2) 562624b58424STheodore Ts'o static inline void register_as_ext2(void) 562724b58424STheodore Ts'o { 562824b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 562924b58424STheodore Ts'o if (err) 563024b58424STheodore Ts'o printk(KERN_WARNING 563124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 563224b58424STheodore Ts'o } 563324b58424STheodore Ts'o 563424b58424STheodore Ts'o static inline void unregister_as_ext2(void) 563524b58424STheodore Ts'o { 563624b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 563724b58424STheodore Ts'o } 56382035e776STheodore Ts'o 56392035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 56402035e776STheodore Ts'o { 5641e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_incompat_features(sb)) 56422035e776STheodore Ts'o return 0; 56432035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 56442035e776STheodore Ts'o return 1; 5645e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext2_ro_compat_features(sb)) 56462035e776STheodore Ts'o return 0; 56472035e776STheodore Ts'o return 1; 56482035e776STheodore Ts'o } 564924b58424STheodore Ts'o #else 565024b58424STheodore Ts'o static inline void register_as_ext2(void) { } 565124b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 56522035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 565324b58424STheodore Ts'o #endif 565424b58424STheodore Ts'o 565524b58424STheodore Ts'o static inline void register_as_ext3(void) 565624b58424STheodore Ts'o { 565724b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 565824b58424STheodore Ts'o if (err) 565924b58424STheodore Ts'o printk(KERN_WARNING 566024b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 566124b58424STheodore Ts'o } 566224b58424STheodore Ts'o 566324b58424STheodore Ts'o static inline void unregister_as_ext3(void) 566424b58424STheodore Ts'o { 566524b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 566624b58424STheodore Ts'o } 56672035e776STheodore Ts'o 56682035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 56692035e776STheodore Ts'o { 5670e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_incompat_features(sb)) 56712035e776STheodore Ts'o return 0; 5672e2b911c5SDarrick J. Wong if (!ext4_has_feature_journal(sb)) 56732035e776STheodore Ts'o return 0; 56742035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 56752035e776STheodore Ts'o return 1; 5676e2b911c5SDarrick J. Wong if (ext4_has_unknown_ext3_ro_compat_features(sb)) 56772035e776STheodore Ts'o return 0; 56782035e776STheodore Ts'o return 1; 56792035e776STheodore Ts'o } 568024b58424STheodore Ts'o 568103010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5682ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 568303010a33STheodore Ts'o .name = "ext4", 5684152a0836SAl Viro .mount = ext4_mount, 5685ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5686ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5687ac27a0ecSDave Kleikamp }; 56887f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5689ac27a0ecSDave Kleikamp 5690e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5691e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5692e9e3bcecSEric Sandeen 56935dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5694ac27a0ecSDave Kleikamp { 5695e9e3bcecSEric Sandeen int i, err; 5696c9de560dSAlex Tomas 5697e294a537STheodore Ts'o ratelimit_state_init(&ext4_mount_msg_ratelimit, 30 * HZ, 64); 569807c0c5d8SAl Viro ext4_li_info = NULL; 569907c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 570007c0c5d8SAl Viro 57019a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 570212e9b892SDmitry Monakhov ext4_check_flag_values(); 5703e9e3bcecSEric Sandeen 5704e142d052SJan Kara for (i = 0; i < EXT4_WQ_HASH_SZ; i++) 5705e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5706e9e3bcecSEric Sandeen 570751865fdaSZheng Liu err = ext4_init_es(); 57086fd058f7STheodore Ts'o if (err) 57096fd058f7STheodore Ts'o return err; 571051865fdaSZheng Liu 571151865fdaSZheng Liu err = ext4_init_pageio(); 571251865fdaSZheng Liu if (err) 5713b5799018STheodore Ts'o goto out5; 571451865fdaSZheng Liu 57155dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5716bd2d0210STheodore Ts'o if (err) 5717b5799018STheodore Ts'o goto out4; 5718857ac889SLukas Czerner 5719b5799018STheodore Ts'o err = ext4_init_sysfs(); 5720dd68314cSTheodore Ts'o if (err) 5721b5799018STheodore Ts'o goto out3; 5722857ac889SLukas Czerner 57235dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5724ac27a0ecSDave Kleikamp if (err) 5725c9de560dSAlex Tomas goto out2; 5726ac27a0ecSDave Kleikamp err = init_inodecache(); 5727ac27a0ecSDave Kleikamp if (err) 5728ac27a0ecSDave Kleikamp goto out1; 572924b58424STheodore Ts'o register_as_ext3(); 57302035e776STheodore Ts'o register_as_ext2(); 573103010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5732ac27a0ecSDave Kleikamp if (err) 5733ac27a0ecSDave Kleikamp goto out; 5734bfff6873SLukas Czerner 5735ac27a0ecSDave Kleikamp return 0; 5736ac27a0ecSDave Kleikamp out: 573724b58424STheodore Ts'o unregister_as_ext2(); 573824b58424STheodore Ts'o unregister_as_ext3(); 5739ac27a0ecSDave Kleikamp destroy_inodecache(); 5740ac27a0ecSDave Kleikamp out1: 57415dabfc78STheodore Ts'o ext4_exit_mballoc(); 57429c191f70ST Makphaibulchoke out2: 5743b5799018STheodore Ts'o ext4_exit_sysfs(); 5744b5799018STheodore Ts'o out3: 5745dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5746b5799018STheodore Ts'o out4: 57475dabfc78STheodore Ts'o ext4_exit_pageio(); 5748b5799018STheodore Ts'o out5: 574951865fdaSZheng Liu ext4_exit_es(); 575051865fdaSZheng Liu 5751ac27a0ecSDave Kleikamp return err; 5752ac27a0ecSDave Kleikamp } 5753ac27a0ecSDave Kleikamp 57545dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5755ac27a0ecSDave Kleikamp { 5756bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 575724b58424STheodore Ts'o unregister_as_ext2(); 575824b58424STheodore Ts'o unregister_as_ext3(); 575903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5760ac27a0ecSDave Kleikamp destroy_inodecache(); 57615dabfc78STheodore Ts'o ext4_exit_mballoc(); 5762b5799018STheodore Ts'o ext4_exit_sysfs(); 57635dabfc78STheodore Ts'o ext4_exit_system_zone(); 57645dabfc78STheodore Ts'o ext4_exit_pageio(); 5765dd12ed14SEric Sandeen ext4_exit_es(); 5766ac27a0ecSDave Kleikamp } 5767ac27a0ecSDave Kleikamp 5768ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 576983982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5770ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 57715dabfc78STheodore Ts'o module_init(ext4_init_fs) 57725dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5773