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> 27ac27a0ecSDave Kleikamp #include <linux/parser.h> 28ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 29a5694255SChristoph Hellwig #include <linux/exportfs.h> 30ac27a0ecSDave Kleikamp #include <linux/vfs.h> 31ac27a0ecSDave Kleikamp #include <linux/random.h> 32ac27a0ecSDave Kleikamp #include <linux/mount.h> 33ac27a0ecSDave Kleikamp #include <linux/namei.h> 34ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 35ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 369f6200bbSTheodore Ts'o #include <linux/proc_fs.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> 41ac27a0ecSDave Kleikamp #include <asm/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 561f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 573197ebdbSTheodore Ts'o static struct kset *ext4_kset; 580b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 590b75a840SLukas Czerner static struct mutex ext4_li_mtx; 600b75a840SLukas Czerner static struct ext4_features *ext4_feat; 619c191f70ST Makphaibulchoke static int ext4_mballoc_ready; 629f6200bbSTheodore Ts'o 63617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 64ac27a0ecSDave Kleikamp unsigned long journal_devnum); 652adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 66e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 67617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 68617ba13bSMingming Cao struct ext4_super_block *es); 69617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 70617ba13bSMingming Cao struct ext4_super_block *es); 71617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 72617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 73617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 74c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 75c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 76152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 77152a0836SAl Viro const char *dev_name, void *data); 782035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 792035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 80d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 81bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 82bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 838f1f7453SEric Sandeen static void ext4_clear_request_list(void); 8427dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); 85ac27a0ecSDave Kleikamp 862035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 872035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 882035e776STheodore Ts'o .owner = THIS_MODULE, 892035e776STheodore Ts'o .name = "ext2", 902035e776STheodore Ts'o .mount = ext4_mount, 912035e776STheodore Ts'o .kill_sb = kill_block_super, 922035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 932035e776STheodore Ts'o }; 947f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 95fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 962035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 972035e776STheodore Ts'o #else 982035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 992035e776STheodore Ts'o #endif 1002035e776STheodore Ts'o 1012035e776STheodore Ts'o 102ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 103ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 104ba69f9abSJan Kara .owner = THIS_MODULE, 105ba69f9abSJan Kara .name = "ext3", 106152a0836SAl Viro .mount = ext4_mount, 107ba69f9abSJan Kara .kill_sb = kill_block_super, 108ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 109ba69f9abSJan Kara }; 1107f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 111fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 112ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 113ba69f9abSJan Kara #else 114ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 115ba69f9abSJan Kara #endif 116bd81d8eeSLaurent Vivier 117d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 118d25425f8SDarrick J. Wong struct ext4_super_block *es) 119d25425f8SDarrick J. Wong { 120d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 121d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 122d25425f8SDarrick J. Wong return 1; 123d25425f8SDarrick J. Wong 124d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 125d25425f8SDarrick J. Wong } 126d25425f8SDarrick J. Wong 127a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 128a9c47317SDarrick J. Wong struct ext4_super_block *es) 129a9c47317SDarrick J. Wong { 130a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 131a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 132a9c47317SDarrick J. Wong __u32 csum; 133a9c47317SDarrick J. Wong 134a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 135a9c47317SDarrick J. Wong 136a9c47317SDarrick J. Wong return cpu_to_le32(csum); 137a9c47317SDarrick J. Wong } 138a9c47317SDarrick J. Wong 139c197855eSStephen Hemminger static int ext4_superblock_csum_verify(struct super_block *sb, 140a9c47317SDarrick J. Wong struct ext4_super_block *es) 141a9c47317SDarrick J. Wong { 1429aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 143a9c47317SDarrick J. Wong return 1; 144a9c47317SDarrick J. Wong 145a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 146a9c47317SDarrick J. Wong } 147a9c47317SDarrick J. Wong 14806db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 149a9c47317SDarrick J. Wong { 15006db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 15106db49e6STheodore Ts'o 1529aa5d32bSDmitry Monakhov if (!ext4_has_metadata_csum(sb)) 153a9c47317SDarrick J. Wong return; 154a9c47317SDarrick J. Wong 155a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 156a9c47317SDarrick J. Wong } 157a9c47317SDarrick J. Wong 1589933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1599933fc0aSTheodore Ts'o { 1609933fc0aSTheodore Ts'o void *ret; 1619933fc0aSTheodore Ts'o 1628be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1639933fc0aSTheodore Ts'o if (!ret) 1649933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1659933fc0aSTheodore Ts'o return ret; 1669933fc0aSTheodore Ts'o } 1679933fc0aSTheodore Ts'o 1689933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1699933fc0aSTheodore Ts'o { 1709933fc0aSTheodore Ts'o void *ret; 1719933fc0aSTheodore Ts'o 1728be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1739933fc0aSTheodore Ts'o if (!ret) 1749933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1759933fc0aSTheodore Ts'o return ret; 1769933fc0aSTheodore Ts'o } 1779933fc0aSTheodore Ts'o 1788fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1798fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 180bd81d8eeSLaurent Vivier { 1813a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1828fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1838fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 184bd81d8eeSLaurent Vivier } 185bd81d8eeSLaurent Vivier 1868fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1878fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 188bd81d8eeSLaurent Vivier { 1895272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1908fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1918fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 192bd81d8eeSLaurent Vivier } 193bd81d8eeSLaurent Vivier 1948fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1958fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 196bd81d8eeSLaurent Vivier { 1975272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1988fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1998fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 200bd81d8eeSLaurent Vivier } 201bd81d8eeSLaurent Vivier 202021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 203560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 204560671a0SAneesh Kumar K.V { 205560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 206560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 207560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 208560671a0SAneesh Kumar K.V } 209560671a0SAneesh Kumar K.V 210560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 211560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 212560671a0SAneesh Kumar K.V { 213560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 214560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 215560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 216560671a0SAneesh Kumar K.V } 217560671a0SAneesh Kumar K.V 218560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 219560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 220560671a0SAneesh Kumar K.V { 221560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 222560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 223560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 224560671a0SAneesh Kumar K.V } 225560671a0SAneesh Kumar K.V 226560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 227560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 228560671a0SAneesh Kumar K.V { 229560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 230560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 231560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 232560671a0SAneesh Kumar K.V } 233560671a0SAneesh Kumar K.V 2348fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2358fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 236bd81d8eeSLaurent Vivier { 2373a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2388fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2398fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 240bd81d8eeSLaurent Vivier } 241bd81d8eeSLaurent Vivier 2428fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2438fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 244bd81d8eeSLaurent Vivier { 2455272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2468fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2478fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 248bd81d8eeSLaurent Vivier } 249bd81d8eeSLaurent Vivier 2508fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2518fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 252bd81d8eeSLaurent Vivier { 2535272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2548fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2558fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 256bd81d8eeSLaurent Vivier } 257bd81d8eeSLaurent Vivier 258021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 259560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 260560671a0SAneesh Kumar K.V { 261560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 262560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 263560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 264560671a0SAneesh Kumar K.V } 265560671a0SAneesh Kumar K.V 266560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 267560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 268560671a0SAneesh Kumar K.V { 269560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 270560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 271560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 272560671a0SAneesh Kumar K.V } 273560671a0SAneesh Kumar K.V 274560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 275560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 276560671a0SAneesh Kumar K.V { 277560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 278560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 279560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 280560671a0SAneesh Kumar K.V } 281560671a0SAneesh Kumar K.V 282560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 283560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 284560671a0SAneesh Kumar K.V { 285560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 286560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 287560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 288560671a0SAneesh Kumar K.V } 289560671a0SAneesh Kumar K.V 290d3d1faf6SCurt Wohlgemuth 2911c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 2921c13d5c0STheodore Ts'o unsigned int line) 2931c13d5c0STheodore Ts'o { 2941c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 2951c13d5c0STheodore Ts'o 2961c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2971c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2981c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 2991c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3001c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3011c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3021c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3031c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3041c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3051c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3061c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3071c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3081c13d5c0STheodore Ts'o } 30966e61a9eSTheodore Ts'o /* 31066e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 31166e61a9eSTheodore Ts'o * started already 31266e61a9eSTheodore Ts'o */ 31366e61a9eSTheodore Ts'o if (!es->s_error_count) 31466e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 315ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3161c13d5c0STheodore Ts'o } 3171c13d5c0STheodore Ts'o 3181c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3191c13d5c0STheodore Ts'o unsigned int line) 3201c13d5c0STheodore Ts'o { 3211c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3221c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3231c13d5c0STheodore Ts'o } 3241c13d5c0STheodore Ts'o 32518aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 32618aadd47SBobi Jam { 32718aadd47SBobi Jam struct super_block *sb = journal->j_private; 32818aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 32918aadd47SBobi Jam int error = is_journal_aborted(journal); 3305d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 33118aadd47SBobi Jam 3325d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 33318aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3345d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3355d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3365d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 33718aadd47SBobi Jam list_del_init(&jce->jce_list); 33818aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 33918aadd47SBobi Jam jce->jce_func(sb, jce, error); 34018aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 34118aadd47SBobi Jam } 34218aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 34318aadd47SBobi Jam } 3441c13d5c0STheodore Ts'o 345ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 346ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 347ac27a0ecSDave Kleikamp * 348ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 349617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 350ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 351ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 352ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 353ac27a0ecSDave Kleikamp * write out the superblock safely. 354ac27a0ecSDave Kleikamp * 355dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 356d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 357ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 358ac27a0ecSDave Kleikamp */ 359ac27a0ecSDave Kleikamp 360617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 361ac27a0ecSDave Kleikamp { 362ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 363ac27a0ecSDave Kleikamp return; 364ac27a0ecSDave Kleikamp 365ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 366617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 367ac27a0ecSDave Kleikamp 3684ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 369ac27a0ecSDave Kleikamp if (journal) 370dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 371ac27a0ecSDave Kleikamp } 372ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 373b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 3744418e141SDmitry Monakhov /* 3754418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 3764418e141SDmitry Monakhov * before ->s_flags update 3774418e141SDmitry Monakhov */ 3784418e141SDmitry Monakhov smp_wmb(); 379ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 380ac27a0ecSDave Kleikamp } 381ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 382617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 383ac27a0ecSDave Kleikamp sb->s_id); 384ac27a0ecSDave Kleikamp } 385ac27a0ecSDave Kleikamp 386efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 387efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 388efbed4dcSTheodore Ts'o "EXT4-fs error") 389efbed4dcSTheodore Ts'o 39012062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 391c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 392ac27a0ecSDave Kleikamp { 3930ff2ea7dSJoe Perches struct va_format vaf; 394ac27a0ecSDave Kleikamp va_list args; 395ac27a0ecSDave Kleikamp 396efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 397ac27a0ecSDave Kleikamp va_start(args, fmt); 3980ff2ea7dSJoe Perches vaf.fmt = fmt; 3990ff2ea7dSJoe Perches vaf.va = &args; 400efbed4dcSTheodore Ts'o printk(KERN_CRIT 401efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4020ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 403ac27a0ecSDave Kleikamp va_end(args); 404efbed4dcSTheodore Ts'o } 405f3fc0210STheodore Ts'o save_error_info(sb, function, line); 406617ba13bSMingming Cao ext4_handle_error(sb); 407ac27a0ecSDave Kleikamp } 408ac27a0ecSDave Kleikamp 409e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 410c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 411273df556SFrank Mayhar const char *fmt, ...) 412273df556SFrank Mayhar { 413273df556SFrank Mayhar va_list args; 414f7c21177STheodore Ts'o struct va_format vaf; 4151c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 416273df556SFrank Mayhar 4171c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4181c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 419efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 420273df556SFrank Mayhar va_start(args, fmt); 421f7c21177STheodore Ts'o vaf.fmt = fmt; 422f7c21177STheodore Ts'o vaf.va = &args; 423c398eda0STheodore Ts'o if (block) 424d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 425d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 426d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 427d9ee81daSJoe Perches block, current->comm, &vaf); 428d9ee81daSJoe Perches else 429d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 430d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 431d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 432d9ee81daSJoe Perches current->comm, &vaf); 433273df556SFrank Mayhar va_end(args); 434efbed4dcSTheodore Ts'o } 435efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 436273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 437273df556SFrank Mayhar } 438273df556SFrank Mayhar 439e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 440f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 441f7c21177STheodore Ts'o const char *fmt, ...) 442273df556SFrank Mayhar { 443273df556SFrank Mayhar va_list args; 444f7c21177STheodore Ts'o struct va_format vaf; 4451c13d5c0STheodore Ts'o struct ext4_super_block *es; 446496ad9aaSAl Viro struct inode *inode = file_inode(file); 447273df556SFrank Mayhar char pathname[80], *path; 448273df556SFrank Mayhar 4491c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4501c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 451efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 452273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 453f9a62d09SDan Carpenter if (IS_ERR(path)) 454273df556SFrank Mayhar path = "(unknown)"; 455f7c21177STheodore Ts'o va_start(args, fmt); 456f7c21177STheodore Ts'o vaf.fmt = fmt; 457f7c21177STheodore Ts'o vaf.va = &args; 458d9ee81daSJoe Perches if (block) 459d9ee81daSJoe Perches printk(KERN_CRIT 460d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 461d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 462d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 463d9ee81daSJoe Perches block, current->comm, path, &vaf); 464d9ee81daSJoe Perches else 465d9ee81daSJoe Perches printk(KERN_CRIT 466d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 467d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 468d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 469d9ee81daSJoe Perches current->comm, path, &vaf); 470273df556SFrank Mayhar va_end(args); 471efbed4dcSTheodore Ts'o } 472efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 473273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 474273df556SFrank Mayhar } 475273df556SFrank Mayhar 476722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 477ac27a0ecSDave Kleikamp char nbuf[16]) 478ac27a0ecSDave Kleikamp { 479ac27a0ecSDave Kleikamp char *errstr = NULL; 480ac27a0ecSDave Kleikamp 481ac27a0ecSDave Kleikamp switch (errno) { 482ac27a0ecSDave Kleikamp case -EIO: 483ac27a0ecSDave Kleikamp errstr = "IO failure"; 484ac27a0ecSDave Kleikamp break; 485ac27a0ecSDave Kleikamp case -ENOMEM: 486ac27a0ecSDave Kleikamp errstr = "Out of memory"; 487ac27a0ecSDave Kleikamp break; 488ac27a0ecSDave Kleikamp case -EROFS: 48978f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 49078f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 491ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 492ac27a0ecSDave Kleikamp else 493ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 494ac27a0ecSDave Kleikamp break; 495ac27a0ecSDave Kleikamp default: 496ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 497ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 498ac27a0ecSDave Kleikamp * NULL. */ 499ac27a0ecSDave Kleikamp if (nbuf) { 500ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 501ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 502ac27a0ecSDave Kleikamp errstr = nbuf; 503ac27a0ecSDave Kleikamp } 504ac27a0ecSDave Kleikamp break; 505ac27a0ecSDave Kleikamp } 506ac27a0ecSDave Kleikamp 507ac27a0ecSDave Kleikamp return errstr; 508ac27a0ecSDave Kleikamp } 509ac27a0ecSDave Kleikamp 510617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 511ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 512ac27a0ecSDave Kleikamp 513c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 514c398eda0STheodore Ts'o unsigned int line, int errno) 515ac27a0ecSDave Kleikamp { 516ac27a0ecSDave Kleikamp char nbuf[16]; 517ac27a0ecSDave Kleikamp const char *errstr; 518ac27a0ecSDave Kleikamp 519ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 520ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 521ac27a0ecSDave Kleikamp * an error. */ 522ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 523ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 524ac27a0ecSDave Kleikamp return; 525ac27a0ecSDave Kleikamp 526efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 527617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 528c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 529c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 530efbed4dcSTheodore Ts'o } 531ac27a0ecSDave Kleikamp 532efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 533617ba13bSMingming Cao ext4_handle_error(sb); 534ac27a0ecSDave Kleikamp } 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp /* 537617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 538ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 539ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 540ac27a0ecSDave Kleikamp * 541ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 542ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 543ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 544ac27a0ecSDave Kleikamp */ 545ac27a0ecSDave Kleikamp 546c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 547c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 548ac27a0ecSDave Kleikamp { 549ac27a0ecSDave Kleikamp va_list args; 550ac27a0ecSDave Kleikamp 5511c13d5c0STheodore Ts'o save_error_info(sb, function, line); 552ac27a0ecSDave Kleikamp va_start(args, fmt); 553c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 554c398eda0STheodore Ts'o function, line); 555ac27a0ecSDave Kleikamp vprintk(fmt, args); 556ac27a0ecSDave Kleikamp printk("\n"); 557ac27a0ecSDave Kleikamp va_end(args); 558ac27a0ecSDave Kleikamp 5591c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 560b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5614ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5624418e141SDmitry Monakhov /* 5634418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5644418e141SDmitry Monakhov * before ->s_flags update 5654418e141SDmitry Monakhov */ 5664418e141SDmitry Monakhov smp_wmb(); 5674418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 568ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 569dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5701c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5711c13d5c0STheodore Ts'o } 5721c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5731c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 574ac27a0ecSDave Kleikamp } 575ac27a0ecSDave Kleikamp 576e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 577e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 578b31e1552SEric Sandeen { 5790ff2ea7dSJoe Perches struct va_format vaf; 580b31e1552SEric Sandeen va_list args; 581b31e1552SEric Sandeen 582efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 583efbed4dcSTheodore Ts'o return; 584efbed4dcSTheodore Ts'o 585b31e1552SEric Sandeen va_start(args, fmt); 5860ff2ea7dSJoe Perches vaf.fmt = fmt; 5870ff2ea7dSJoe Perches vaf.va = &args; 5880ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 589b31e1552SEric Sandeen va_end(args); 590b31e1552SEric Sandeen } 591b31e1552SEric Sandeen 59212062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 593c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 594ac27a0ecSDave Kleikamp { 5950ff2ea7dSJoe Perches struct va_format vaf; 596ac27a0ecSDave Kleikamp va_list args; 597ac27a0ecSDave Kleikamp 598efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 599efbed4dcSTheodore Ts'o "EXT4-fs warning")) 600efbed4dcSTheodore Ts'o return; 601efbed4dcSTheodore Ts'o 602ac27a0ecSDave Kleikamp va_start(args, fmt); 6030ff2ea7dSJoe Perches vaf.fmt = fmt; 6040ff2ea7dSJoe Perches vaf.va = &args; 6050ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6060ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 607ac27a0ecSDave Kleikamp va_end(args); 608ac27a0ecSDave Kleikamp } 609ac27a0ecSDave Kleikamp 610e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 611e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 612e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 613e29136f8STheodore Ts'o const char *fmt, ...) 6145d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6155d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6165d1b1b3fSAneesh Kumar K.V { 6170ff2ea7dSJoe Perches struct va_format vaf; 6185d1b1b3fSAneesh Kumar K.V va_list args; 6195d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6205d1b1b3fSAneesh Kumar K.V 6211c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6221c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6231c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6240ff2ea7dSJoe Perches 625efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6265d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6270ff2ea7dSJoe Perches vaf.fmt = fmt; 6280ff2ea7dSJoe Perches vaf.va = &args; 62921149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 630e29136f8STheodore Ts'o sb->s_id, function, line, grp); 631e29136f8STheodore Ts'o if (ino) 6320ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 633e29136f8STheodore Ts'o if (block) 634efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 635efbed4dcSTheodore Ts'o (unsigned long long) block); 6360ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6375d1b1b3fSAneesh Kumar K.V va_end(args); 638efbed4dcSTheodore Ts'o } 6395d1b1b3fSAneesh Kumar K.V 6405d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 641e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6425d1b1b3fSAneesh Kumar K.V return; 6435d1b1b3fSAneesh Kumar K.V } 6441c13d5c0STheodore Ts'o 6455d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6465d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6475d1b1b3fSAneesh Kumar K.V /* 6485d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6495d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6505d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6515d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6525d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 65325985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6545d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6555d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6565d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6575d1b1b3fSAneesh Kumar K.V */ 6585d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6595d1b1b3fSAneesh Kumar K.V return; 6605d1b1b3fSAneesh Kumar K.V } 6615d1b1b3fSAneesh Kumar K.V 662617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 663ac27a0ecSDave Kleikamp { 664617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 665ac27a0ecSDave Kleikamp 666617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 667ac27a0ecSDave Kleikamp return; 668ac27a0ecSDave Kleikamp 66912062dddSEric Sandeen ext4_warning(sb, 670ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 671ac27a0ecSDave Kleikamp "running e2fsck is recommended", 672617ba13bSMingming Cao EXT4_DYNAMIC_REV); 673ac27a0ecSDave Kleikamp 674617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 675617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 676617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 677ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 678ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 679ac27a0ecSDave Kleikamp 680ac27a0ecSDave Kleikamp /* 681ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 682ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 683ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 684ac27a0ecSDave Kleikamp */ 685ac27a0ecSDave Kleikamp } 686ac27a0ecSDave Kleikamp 687ac27a0ecSDave Kleikamp /* 688ac27a0ecSDave Kleikamp * Open the external journal device 689ac27a0ecSDave Kleikamp */ 690b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 691ac27a0ecSDave Kleikamp { 692ac27a0ecSDave Kleikamp struct block_device *bdev; 693ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 694ac27a0ecSDave Kleikamp 695d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 696ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 697ac27a0ecSDave Kleikamp goto fail; 698ac27a0ecSDave Kleikamp return bdev; 699ac27a0ecSDave Kleikamp 700ac27a0ecSDave Kleikamp fail: 701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 702ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 703ac27a0ecSDave Kleikamp return NULL; 704ac27a0ecSDave Kleikamp } 705ac27a0ecSDave Kleikamp 706ac27a0ecSDave Kleikamp /* 707ac27a0ecSDave Kleikamp * Release the journal device 708ac27a0ecSDave Kleikamp */ 7094385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 710ac27a0ecSDave Kleikamp { 7114385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 712ac27a0ecSDave Kleikamp } 713ac27a0ecSDave Kleikamp 7144385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 715ac27a0ecSDave Kleikamp { 716ac27a0ecSDave Kleikamp struct block_device *bdev; 717ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 718ac27a0ecSDave Kleikamp if (bdev) { 7194385bab1SAl Viro ext4_blkdev_put(bdev); 720ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 721ac27a0ecSDave Kleikamp } 722ac27a0ecSDave Kleikamp } 723ac27a0ecSDave Kleikamp 724ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 725ac27a0ecSDave Kleikamp { 726617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 727ac27a0ecSDave Kleikamp } 728ac27a0ecSDave Kleikamp 729617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 730ac27a0ecSDave Kleikamp { 731ac27a0ecSDave Kleikamp struct list_head *l; 732ac27a0ecSDave Kleikamp 733b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 734ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 735ac27a0ecSDave Kleikamp 736ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 737ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 738ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 739ac27a0ecSDave Kleikamp printk(KERN_ERR " " 740ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 741ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 742ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 743ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 744ac27a0ecSDave Kleikamp } 745ac27a0ecSDave Kleikamp } 746ac27a0ecSDave Kleikamp 747617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 748ac27a0ecSDave Kleikamp { 749617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 750617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 751ef2cabf7SHidehiro Kawai int i, err; 752ac27a0ecSDave Kleikamp 753857ac889SLukas Czerner ext4_unregister_li_request(sb); 754e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 755e0ccfd95SChristoph Hellwig 7562e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 7572e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 7584c0425ffSMingming Cao 7590390131bSFrank Mayhar if (sbi->s_journal) { 760ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 76147b4a50bSJan Kara sbi->s_journal = NULL; 762ef2cabf7SHidehiro Kawai if (err < 0) 763c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7640390131bSFrank Mayhar } 765d4edac31SJosef Bacik 766d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 7679105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 768d4edac31SJosef Bacik ext4_release_system_zone(sb); 769d4edac31SJosef Bacik ext4_mb_release(sb); 770d4edac31SJosef Bacik ext4_ext_release(sb); 771d4edac31SJosef Bacik ext4_xattr_put_super(sb); 772d4edac31SJosef Bacik 773ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 774617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 775ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 776ac27a0ecSDave Kleikamp } 77758c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 778a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 779a8e25a83SArtem Bityutskiy 780240799cdSTheodore Ts'o if (sbi->s_proc) { 78166acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 7829f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 783240799cdSTheodore Ts'o } 7843197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 785ac27a0ecSDave Kleikamp 786ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 787ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 788b93b41d4SAl Viro kvfree(sbi->s_group_desc); 789b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 79057042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 791ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 792ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 79357042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 794ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 795ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 796a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 797ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 798ac27a0ecSDave Kleikamp #endif 799ac27a0ecSDave Kleikamp 800ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 801ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 802ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 803ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 804ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 805ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 806ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 807ac27a0ecSDave Kleikamp 808f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 809ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 810ac27a0ecSDave Kleikamp /* 811ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 812ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 813ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 814ac27a0ecSDave Kleikamp */ 815ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 816f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 817617ba13bSMingming Cao ext4_blkdev_remove(sbi); 818ac27a0ecSDave Kleikamp } 8199c191f70ST Makphaibulchoke if (sbi->s_mb_cache) { 8209c191f70ST Makphaibulchoke ext4_xattr_destroy_cache(sbi->s_mb_cache); 8219c191f70ST Makphaibulchoke sbi->s_mb_cache = NULL; 8229c191f70ST Makphaibulchoke } 823c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 824c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 825ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8263197ebdbSTheodore Ts'o /* 8273197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8283197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8293197ebdbSTheodore Ts'o */ 8303197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8313197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8320441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8330441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 834705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 835ac27a0ecSDave Kleikamp kfree(sbi); 836ac27a0ecSDave Kleikamp } 837ac27a0ecSDave Kleikamp 838e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 839ac27a0ecSDave Kleikamp 840ac27a0ecSDave Kleikamp /* 841ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 842ac27a0ecSDave Kleikamp */ 843617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 844ac27a0ecSDave Kleikamp { 845617ba13bSMingming Cao struct ext4_inode_info *ei; 846ac27a0ecSDave Kleikamp 847e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 848ac27a0ecSDave Kleikamp if (!ei) 849ac27a0ecSDave Kleikamp return NULL; 8500b8e58a1SAndreas Dilger 851ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 852202ee5dfSTheodore Ts'o spin_lock_init(&ei->i_raw_lock); 853c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 854c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8559a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8569a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 857edaa53caSZheng Liu INIT_LIST_HEAD(&ei->i_es_list); 858eb68d0e2SZheng Liu ei->i_es_all_nr = 0; 859edaa53caSZheng Liu ei->i_es_shk_nr = 0; 860dd475925SJan Kara ei->i_es_shrink_lblk = 0; 861d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 862d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 863d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8649d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8657e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 866d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 867a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 868a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 86996c7e0d9SJan Kara memset(&ei->i_dquot, 0, sizeof(ei->i_dquot)); 870a9e7f447SDmitry Monakhov #endif 8718aefcd55STheodore Ts'o ei->jinode = NULL; 8722e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 873744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 874b436b9beSJan Kara ei->i_sync_tid = 0; 875b436b9beSJan Kara ei->i_datasync_tid = 0; 876f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 877e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 8782e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 879b30ab0e0SMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 880b30ab0e0SMichael Halcrow ei->i_encryption_key.mode = EXT4_ENCRYPTION_MODE_INVALID; 881b30ab0e0SMichael Halcrow #endif 8820b8e58a1SAndreas Dilger 883ac27a0ecSDave Kleikamp return &ei->vfs_inode; 884ac27a0ecSDave Kleikamp } 885ac27a0ecSDave Kleikamp 8867ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 8877ff9c073STheodore Ts'o { 8887ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 8897ff9c073STheodore Ts'o 8907ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 8917ff9c073STheodore Ts'o return drop; 8927ff9c073STheodore Ts'o } 8937ff9c073STheodore Ts'o 894fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 895fa0d7e3dSNick Piggin { 896fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 897fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 898fa0d7e3dSNick Piggin } 899fa0d7e3dSNick Piggin 900617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 901ac27a0ecSDave Kleikamp { 9029f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 903b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 904b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 905b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9069f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9079f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9089f7dd93dSVasily Averin true); 9099f7dd93dSVasily Averin dump_stack(); 9109f7dd93dSVasily Averin } 911fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 912ac27a0ecSDave Kleikamp } 913ac27a0ecSDave Kleikamp 91451cc5068SAlexey Dobriyan static void init_once(void *foo) 915ac27a0ecSDave Kleikamp { 916617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 917ac27a0ecSDave Kleikamp 918ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 919ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9200e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 921ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 922ac27a0ecSDave Kleikamp } 923ac27a0ecSDave Kleikamp 924e67bc2b3SFabian Frederick static int __init init_inodecache(void) 925ac27a0ecSDave Kleikamp { 926617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 927617ba13bSMingming Cao sizeof(struct ext4_inode_info), 928ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 929ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 93020c2df83SPaul Mundt init_once); 931617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 932ac27a0ecSDave Kleikamp return -ENOMEM; 933ac27a0ecSDave Kleikamp return 0; 934ac27a0ecSDave Kleikamp } 935ac27a0ecSDave Kleikamp 936ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 937ac27a0ecSDave Kleikamp { 9388c0a8537SKirill A. Shutemov /* 9398c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9408c0a8537SKirill A. Shutemov * destroy cache. 9418c0a8537SKirill A. Shutemov */ 9428c0a8537SKirill A. Shutemov rcu_barrier(); 943617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 944ac27a0ecSDave Kleikamp } 945ac27a0ecSDave Kleikamp 9460930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 947ac27a0ecSDave Kleikamp { 9480930fcc1SAl Viro invalidate_inode_buffers(inode); 949dbd5768fSJan Kara clear_inode(inode); 9509f754758SChristoph Hellwig dquot_drop(inode); 951c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 95251865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 9538aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9548aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9558aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9568aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9578aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9588aefcd55STheodore Ts'o } 959ac27a0ecSDave Kleikamp } 960ac27a0ecSDave Kleikamp 9611b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9621b961ac0SChristoph Hellwig u64 ino, u32 generation) 963ac27a0ecSDave Kleikamp { 964ac27a0ecSDave Kleikamp struct inode *inode; 965ac27a0ecSDave Kleikamp 966617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 967ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 968617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 969ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 970ac27a0ecSDave Kleikamp 971ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 972ac27a0ecSDave Kleikamp * 973617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 974ac27a0ecSDave Kleikamp * deleted, so we should be safe. 975ac27a0ecSDave Kleikamp * 976ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 977ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 978ac27a0ecSDave Kleikamp */ 979f4bb2981STheodore Ts'o inode = ext4_iget_normal(sb, ino); 9801d1fe1eeSDavid Howells if (IS_ERR(inode)) 9811d1fe1eeSDavid Howells return ERR_CAST(inode); 9821d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 983ac27a0ecSDave Kleikamp iput(inode); 984ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 985ac27a0ecSDave Kleikamp } 9861b961ac0SChristoph Hellwig 9871b961ac0SChristoph Hellwig return inode; 988ac27a0ecSDave Kleikamp } 9891b961ac0SChristoph Hellwig 9901b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 9911b961ac0SChristoph Hellwig int fh_len, int fh_type) 9921b961ac0SChristoph Hellwig { 9931b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 9941b961ac0SChristoph Hellwig ext4_nfs_get_inode); 9951b961ac0SChristoph Hellwig } 9961b961ac0SChristoph Hellwig 9971b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9981b961ac0SChristoph Hellwig int fh_len, int fh_type) 9991b961ac0SChristoph Hellwig { 10001b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10011b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1002ac27a0ecSDave Kleikamp } 1003ac27a0ecSDave Kleikamp 1004c39a7f84SToshiyuki Okajima /* 1005c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1006c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1007c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1008c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1009c39a7f84SToshiyuki Okajima */ 10100b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10110b8e58a1SAndreas Dilger gfp_t wait) 1012c39a7f84SToshiyuki Okajima { 1013c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1014c39a7f84SToshiyuki Okajima 1015c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1016c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1017c39a7f84SToshiyuki Okajima return 0; 1018c39a7f84SToshiyuki Okajima if (journal) 1019c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1020c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1021c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1022c39a7f84SToshiyuki Okajima } 1023c39a7f84SToshiyuki Okajima 1024ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1025ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1026ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1027ac27a0ecSDave Kleikamp 1028617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1029617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1030617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1031617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1032617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10336f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1034f00c9e44SJan Kara struct path *path); 1035ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1036617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1037617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1038ac27a0ecSDave Kleikamp size_t len, loff_t off); 1039617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1040ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10417c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10427c319d32SAditya Kali unsigned int flags); 10437c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1044ac27a0ecSDave Kleikamp 104596c7e0d9SJan Kara static struct dquot **ext4_get_dquots(struct inode *inode) 104696c7e0d9SJan Kara { 104796c7e0d9SJan Kara return EXT4_I(inode)->i_dquot; 104896c7e0d9SJan Kara } 104996c7e0d9SJan Kara 105061e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 105160e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1052617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1053617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1054617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1055617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1056a5b5ee32SJan Kara .write_info = ext4_write_info, 1057a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1058a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1059ac27a0ecSDave Kleikamp }; 1060ac27a0ecSDave Kleikamp 10610d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1062617ba13bSMingming Cao .quota_on = ext4_quota_on, 1063ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1064287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1065287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1066287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1067287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1068287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1069ac27a0ecSDave Kleikamp }; 1070ac27a0ecSDave Kleikamp #endif 1071ac27a0ecSDave Kleikamp 1072ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1073617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1074617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1075617ba13bSMingming Cao .write_inode = ext4_write_inode, 1076617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 10777ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 10780930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1079617ba13bSMingming Cao .put_super = ext4_put_super, 1080617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1081c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1082c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1083617ba13bSMingming Cao .statfs = ext4_statfs, 1084617ba13bSMingming Cao .remount_fs = ext4_remount, 1085617ba13bSMingming Cao .show_options = ext4_show_options, 1086ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1087617ba13bSMingming Cao .quota_read = ext4_quota_read, 1088617ba13bSMingming Cao .quota_write = ext4_quota_write, 108996c7e0d9SJan Kara .get_dquots = ext4_get_dquots, 1090ac27a0ecSDave Kleikamp #endif 1091c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1092ac27a0ecSDave Kleikamp }; 1093ac27a0ecSDave Kleikamp 109439655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 10951b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 10961b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1097617ba13bSMingming Cao .get_parent = ext4_get_parent, 1098ac27a0ecSDave Kleikamp }; 1099ac27a0ecSDave Kleikamp 1100ac27a0ecSDave Kleikamp enum { 1101ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1102ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 110372578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1104ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 110572578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1106ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1107ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1108ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1109*6ddb2447STheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, Opt_test_dummy_encryption, 1110ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11115a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1112ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1113923ae0ffSRoss Zwisler Opt_usrquota, Opt_grpquota, Opt_i_version, Opt_dax, 11141449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 1115a26f4992STheodore Ts'o Opt_lazytime, Opt_nolazytime, 11161449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11175328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1118744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1119fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1120c6d3d56dSDarrick J. Wong Opt_max_dir_size_kb, Opt_nojournal_checksum, 1121ac27a0ecSDave Kleikamp }; 1122ac27a0ecSDave Kleikamp 1123a447c093SSteven Whitehouse static const match_table_t tokens = { 1124ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1125ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1126ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1127ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1128ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1129ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1130ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1131ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1132ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1133ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1134ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1135ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1136ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1137ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 113872578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 113972578c33STheodore Ts'o {Opt_removed, "orlov"}, 1140ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1141ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1142ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1143ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1144e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11455a916be1STheodore Ts'o {Opt_noload, "noload"}, 114672578c33STheodore Ts'o {Opt_removed, "nobh"}, 114772578c33STheodore Ts'o {Opt_removed, "bh"}, 1148ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 114930773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 115030773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1151ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1152ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1153818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1154c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, "nojournal_checksum"}, 1155818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1156ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1157ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1158ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1159ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 11605bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11615bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1162ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1163ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1164ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1165ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1166ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1167ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 11685a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1169ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1170ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1171ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1172ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1173ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 117406705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 117506705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 117625ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1177923ae0ffSRoss Zwisler {Opt_dax, "dax"}, 1178c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 117964769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1180a26f4992STheodore Ts'o {Opt_lazytime, "lazytime"}, 1181a26f4992STheodore Ts'o {Opt_nolazytime, "nolazytime"}, 1182dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 118336ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 118436ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 11856fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 11866fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1187240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1188b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1189afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 119006705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 119106705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1192744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1193744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 11945328e635SEric Sandeen {Opt_discard, "discard"}, 11955328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1196fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1197fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1198fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1199df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1200*6ddb2447STheodore Ts'o {Opt_test_dummy_encryption, "test_dummy_encryption"}, 1201c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1202c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1203c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1204c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1205c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1206f3f12faaSJosef Bacik {Opt_err, NULL}, 1207ac27a0ecSDave Kleikamp }; 1208ac27a0ecSDave Kleikamp 1209617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1210ac27a0ecSDave Kleikamp { 1211617ba13bSMingming Cao ext4_fsblk_t sb_block; 1212ac27a0ecSDave Kleikamp char *options = (char *) *data; 1213ac27a0ecSDave Kleikamp 1214ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1215ac27a0ecSDave Kleikamp return 1; /* Default location */ 12160b8e58a1SAndreas Dilger 1217ac27a0ecSDave Kleikamp options += 3; 12180b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1219ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1220ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12214776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1222ac27a0ecSDave Kleikamp (char *) *data); 1223ac27a0ecSDave Kleikamp return 1; 1224ac27a0ecSDave Kleikamp } 1225ac27a0ecSDave Kleikamp if (*options == ',') 1226ac27a0ecSDave Kleikamp options++; 1227ac27a0ecSDave Kleikamp *data = (void *) options; 12280b8e58a1SAndreas Dilger 1229ac27a0ecSDave Kleikamp return sb_block; 1230ac27a0ecSDave Kleikamp } 1231ac27a0ecSDave Kleikamp 1232b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1233437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1234437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1235b3881f74STheodore Ts'o 123656c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 123756c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 123856c50f11SDmitry Monakhov { 123956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 124056c50f11SDmitry Monakhov char *qname; 124103dafb5fSChen Gang int ret = -1; 124256c50f11SDmitry Monakhov 124356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 124456c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 124556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 124656c50f11SDmitry Monakhov "Cannot change journaled " 124756c50f11SDmitry Monakhov "quota options when quota turned on"); 124857f73c2cSTheodore Ts'o return -1; 124956c50f11SDmitry Monakhov } 1250262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1251262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1252262b4662SJan Kara "when QUOTA feature is enabled"); 1253262b4662SJan Kara return -1; 1254262b4662SJan Kara } 125556c50f11SDmitry Monakhov qname = match_strdup(args); 125656c50f11SDmitry Monakhov if (!qname) { 125756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 125856c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 125957f73c2cSTheodore Ts'o return -1; 126056c50f11SDmitry Monakhov } 126103dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 126203dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 126303dafb5fSChen Gang ret = 1; 126403dafb5fSChen Gang else 126556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 126603dafb5fSChen Gang "%s quota file already specified", 126703dafb5fSChen Gang QTYPE2NAME(qtype)); 126803dafb5fSChen Gang goto errout; 126956c50f11SDmitry Monakhov } 127003dafb5fSChen Gang if (strchr(qname, '/')) { 127156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 127256c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 127303dafb5fSChen Gang goto errout; 127456c50f11SDmitry Monakhov } 127503dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1276fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 127756c50f11SDmitry Monakhov return 1; 127803dafb5fSChen Gang errout: 127903dafb5fSChen Gang kfree(qname); 128003dafb5fSChen Gang return ret; 128156c50f11SDmitry Monakhov } 128256c50f11SDmitry Monakhov 128356c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 128456c50f11SDmitry Monakhov { 128556c50f11SDmitry Monakhov 128656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 128756c50f11SDmitry Monakhov 128856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 128956c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 129056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 129156c50f11SDmitry Monakhov " when quota turned on"); 129257f73c2cSTheodore Ts'o return -1; 129356c50f11SDmitry Monakhov } 129403dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 129556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 129656c50f11SDmitry Monakhov return 1; 129756c50f11SDmitry Monakhov } 129856c50f11SDmitry Monakhov #endif 129956c50f11SDmitry Monakhov 130026092bf5STheodore Ts'o #define MOPT_SET 0x0001 130126092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 130226092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 130326092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 130426092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 130526092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 130626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 130726092bf5STheodore Ts'o #define MOPT_Q 0 130826092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 130926092bf5STheodore Ts'o #else 131026092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 131126092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 131226092bf5STheodore Ts'o #endif 131326092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13148dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13158dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13168dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1317ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 131826092bf5STheodore Ts'o 131926092bf5STheodore Ts'o static const struct mount_opts { 132026092bf5STheodore Ts'o int token; 132126092bf5STheodore Ts'o int mount_opt; 132226092bf5STheodore Ts'o int flags; 132326092bf5STheodore Ts'o } ext4_mount_opts[] = { 132426092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 132526092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 132626092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 132726092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 132826092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 132926092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13308dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13318dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13328dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13338dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 133426092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 133526092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13368dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13378dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13388dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 133959d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 1340c6d3d56dSDarrick J. Wong {Opt_nojournal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 1341c6d3d56dSDarrick J. Wong MOPT_EXT4_ONLY | MOPT_CLEAR}, 13428dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13438dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 134426092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13458dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13468dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13478dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 134826092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 134926092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 135026092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13518dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13528dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13538dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13548dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 135526092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 135626092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 135726092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 135826092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 135926092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 136026092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 136126092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 136226092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 136326092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 136426092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 1365923ae0ffSRoss Zwisler {Opt_dax, EXT4_MOUNT_DAX, MOPT_SET}, 136626092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 13670efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 13680efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 13690efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1370ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 13710efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 13728dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13738dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 13748dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 13758dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 137626092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 137726092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 137826092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 137926092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 138026092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 138126092bf5STheodore Ts'o #else 138226092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 138326092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 138426092bf5STheodore Ts'o #endif 138526092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 138626092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 138726092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 138826092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 138926092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 139026092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 139126092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 139226092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 139326092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 139426092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 139526092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 139626092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 139726092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 139826092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 139926092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 140026092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1401df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 1402*6ddb2447STheodore Ts'o {Opt_test_dummy_encryption, 0, MOPT_GTE0}, 140326092bf5STheodore Ts'o {Opt_err, 0, 0} 140426092bf5STheodore Ts'o }; 140526092bf5STheodore Ts'o 140626092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 140726092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 140826092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 140926092bf5STheodore Ts'o { 141026092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 141126092bf5STheodore Ts'o const struct mount_opts *m; 141208cefc7aSEric W. Biederman kuid_t uid; 141308cefc7aSEric W. Biederman kgid_t gid; 141426092bf5STheodore Ts'o int arg = 0; 141526092bf5STheodore Ts'o 141657f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 141757f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 141857f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 141957f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 142057f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 142157f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 142257f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 142357f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 142457f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 142557f73c2cSTheodore Ts'o #endif 142626092bf5STheodore Ts'o switch (token) { 1427f7048605STheodore Ts'o case Opt_noacl: 1428f7048605STheodore Ts'o case Opt_nouser_xattr: 1429f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1430f7048605STheodore Ts'o break; 143126092bf5STheodore Ts'o case Opt_sb: 143226092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 143326092bf5STheodore Ts'o case Opt_removed: 14345f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 143526092bf5STheodore Ts'o return 1; 143626092bf5STheodore Ts'o case Opt_abort: 143726092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 143826092bf5STheodore Ts'o return 1; 143926092bf5STheodore Ts'o case Opt_i_version: 144026092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 144126092bf5STheodore Ts'o return 1; 1442a26f4992STheodore Ts'o case Opt_lazytime: 1443a26f4992STheodore Ts'o sb->s_flags |= MS_LAZYTIME; 1444a26f4992STheodore Ts'o return 1; 1445a26f4992STheodore Ts'o case Opt_nolazytime: 1446a26f4992STheodore Ts'o sb->s_flags &= ~MS_LAZYTIME; 1447a26f4992STheodore Ts'o return 1; 144826092bf5STheodore Ts'o } 144926092bf5STheodore Ts'o 14505f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14515f3633e3SJan Kara if (token == m->token) 14525f3633e3SJan Kara break; 14535f3633e3SJan Kara 14545f3633e3SJan Kara if (m->token == Opt_err) { 14555f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14565f3633e3SJan Kara "or missing value", opt); 14575f3633e3SJan Kara return -1; 14585f3633e3SJan Kara } 14595f3633e3SJan Kara 14608dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14618dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14628dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14638dc0aa8cSTheodore Ts'o return -1; 14648dc0aa8cSTheodore Ts'o } 14658dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14668dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14678dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14688dc0aa8cSTheodore Ts'o return -1; 14698dc0aa8cSTheodore Ts'o } 14708dc0aa8cSTheodore Ts'o 1471ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 14720efb3b23SJan Kara return -1; 147326092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 147426092bf5STheodore Ts'o return -1; 147526092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 147626092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 147726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 147826092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 147926092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 148026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 148126092bf5STheodore Ts'o "options when quota turned on"); 148226092bf5STheodore Ts'o return -1; 148326092bf5STheodore Ts'o } 148426092bf5STheodore Ts'o 148526092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 148626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 148726092bf5STheodore Ts'o } else if (token == Opt_commit) { 148826092bf5STheodore Ts'o if (arg == 0) 148926092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 149026092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 149126092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 149226092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 149326092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 149426092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 149526092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1496e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1497e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1498e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1499e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 150026092bf5STheodore Ts'o return -1; 150126092bf5STheodore Ts'o } 150226092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 150326092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 150426092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 150526092bf5STheodore Ts'o if (!args->from) 150626092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 150726092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1508df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1509df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 151026092bf5STheodore Ts'o } else if (token == Opt_stripe) { 151126092bf5STheodore Ts'o sbi->s_stripe = arg; 15120efb3b23SJan Kara } else if (token == Opt_resuid) { 15130efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15140efb3b23SJan Kara if (!uid_valid(uid)) { 15155f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15160efb3b23SJan Kara return -1; 15170efb3b23SJan Kara } 15180efb3b23SJan Kara sbi->s_resuid = uid; 15190efb3b23SJan Kara } else if (token == Opt_resgid) { 15200efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15210efb3b23SJan Kara if (!gid_valid(gid)) { 15225f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15230efb3b23SJan Kara return -1; 15240efb3b23SJan Kara } 15250efb3b23SJan Kara sbi->s_resgid = gid; 15260efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15270efb3b23SJan Kara if (is_remount) { 15280efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15290efb3b23SJan Kara "Cannot specify journal on remount"); 15300efb3b23SJan Kara return -1; 15310efb3b23SJan Kara } 15320efb3b23SJan Kara *journal_devnum = arg; 1533ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1534ad4eec61SEric Sandeen char *journal_path; 1535ad4eec61SEric Sandeen struct inode *journal_inode; 1536ad4eec61SEric Sandeen struct path path; 1537ad4eec61SEric Sandeen int error; 1538ad4eec61SEric Sandeen 1539ad4eec61SEric Sandeen if (is_remount) { 1540ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1541ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1542ad4eec61SEric Sandeen return -1; 1543ad4eec61SEric Sandeen } 1544ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1545ad4eec61SEric Sandeen if (!journal_path) { 1546ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1547ad4eec61SEric Sandeen "journal device string"); 1548ad4eec61SEric Sandeen return -1; 1549ad4eec61SEric Sandeen } 1550ad4eec61SEric Sandeen 1551ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1552ad4eec61SEric Sandeen if (error) { 1553ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1554ad4eec61SEric Sandeen "journal device path: error %d", error); 1555ad4eec61SEric Sandeen kfree(journal_path); 1556ad4eec61SEric Sandeen return -1; 1557ad4eec61SEric Sandeen } 1558ad4eec61SEric Sandeen 1559ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1560ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1561ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1562ad4eec61SEric Sandeen "is not a block device", journal_path); 1563ad4eec61SEric Sandeen path_put(&path); 1564ad4eec61SEric Sandeen kfree(journal_path); 1565ad4eec61SEric Sandeen return -1; 1566ad4eec61SEric Sandeen } 1567ad4eec61SEric Sandeen 1568ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1569ad4eec61SEric Sandeen path_put(&path); 1570ad4eec61SEric Sandeen kfree(journal_path); 15710efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 15720efb3b23SJan Kara if (arg > 7) { 15735f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 15740efb3b23SJan Kara " (must be 0-7)"); 15750efb3b23SJan Kara return -1; 15760efb3b23SJan Kara } 15770efb3b23SJan Kara *journal_ioprio = 15780efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 1579*6ddb2447STheodore Ts'o } else if (token == Opt_test_dummy_encryption) { 1580*6ddb2447STheodore Ts'o #ifdef CONFIG_EXT4_FS_ENCRYPTION 1581*6ddb2447STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION; 1582*6ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 1583*6ddb2447STheodore Ts'o "Test dummy encryption mode enabled"); 1584*6ddb2447STheodore Ts'o #else 1585*6ddb2447STheodore Ts'o ext4_msg(sb, KERN_WARNING, 1586*6ddb2447STheodore Ts'o "Test dummy encryption mount option ignored"); 1587*6ddb2447STheodore Ts'o #endif 158826092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 158926092bf5STheodore Ts'o if (is_remount) { 159026092bf5STheodore Ts'o if (!sbi->s_journal) 159126092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 15925f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 159326092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 159426092bf5STheodore Ts'o "Cannot change data mode on remount"); 159526092bf5STheodore Ts'o return -1; 159626092bf5STheodore Ts'o } 159726092bf5STheodore Ts'o } else { 159826092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 159926092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 160026092bf5STheodore Ts'o } 160126092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 160226092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 160326092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 160426092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16055f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16065f3633e3SJan Kara "quota options when quota turned on"); 160726092bf5STheodore Ts'o return -1; 160826092bf5STheodore Ts'o } 1609262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1610262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1611262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1612262b4662SJan Kara "Cannot set journaled quota options " 1613262b4662SJan Kara "when QUOTA feature is enabled"); 1614262b4662SJan Kara return -1; 1615262b4662SJan Kara } 161626092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 161726092bf5STheodore Ts'o #endif 1618923ae0ffSRoss Zwisler #ifndef CONFIG_FS_DAX 1619923ae0ffSRoss Zwisler } else if (token == Opt_dax) { 1620923ae0ffSRoss Zwisler ext4_msg(sb, KERN_INFO, "dax option not supported"); 1621923ae0ffSRoss Zwisler return -1; 1622923ae0ffSRoss Zwisler #endif 162326092bf5STheodore Ts'o } else { 162426092bf5STheodore Ts'o if (!args->from) 162526092bf5STheodore Ts'o arg = 1; 162626092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 162726092bf5STheodore Ts'o arg = !arg; 162826092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 162926092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 163026092bf5STheodore Ts'o "buggy handling of option %s", opt); 163126092bf5STheodore Ts'o WARN_ON(1); 163226092bf5STheodore Ts'o return -1; 163326092bf5STheodore Ts'o } 163426092bf5STheodore Ts'o if (arg != 0) 163526092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 163626092bf5STheodore Ts'o else 163726092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 163826092bf5STheodore Ts'o } 163926092bf5STheodore Ts'o return 1; 164026092bf5STheodore Ts'o } 164126092bf5STheodore Ts'o 1642ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1643c3191067STheodore Ts'o unsigned long *journal_devnum, 1644b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1645661aa520SEric Sandeen int is_remount) 1646ac27a0ecSDave Kleikamp { 1647617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1648ac27a0ecSDave Kleikamp char *p; 1649ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 165026092bf5STheodore Ts'o int token; 1651ac27a0ecSDave Kleikamp 1652ac27a0ecSDave Kleikamp if (!options) 1653ac27a0ecSDave Kleikamp return 1; 1654ac27a0ecSDave Kleikamp 1655ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1656ac27a0ecSDave Kleikamp if (!*p) 1657ac27a0ecSDave Kleikamp continue; 165815121c18SEric Sandeen /* 165915121c18SEric Sandeen * Initialize args struct so we know whether arg was 166015121c18SEric Sandeen * found; some options take optional arguments. 166115121c18SEric Sandeen */ 1662caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1663ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 166426092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 166526092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1666ac27a0ecSDave Kleikamp return 0; 1667ac27a0ecSDave Kleikamp } 1668ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1669262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1670262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1671262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1672262b4662SJan Kara "feature is enabled"); 1673262b4662SJan Kara return 0; 1674262b4662SJan Kara } 1675ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1676482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1677fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1678ac27a0ecSDave Kleikamp 1679482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1680fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1681ac27a0ecSDave Kleikamp 168256c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1683b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1684b31e1552SEric Sandeen "format mixing"); 1685ac27a0ecSDave Kleikamp return 0; 1686ac27a0ecSDave Kleikamp } 1687ac27a0ecSDave Kleikamp 1688ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1689b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1690b31e1552SEric Sandeen "not specified"); 1691ac27a0ecSDave Kleikamp return 0; 1692ac27a0ecSDave Kleikamp } 1693ac27a0ecSDave Kleikamp } 1694ac27a0ecSDave Kleikamp #endif 1695261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1696261cb20cSJan Kara int blocksize = 1697261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1698261cb20cSJan Kara 1699261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1700261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1701261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1702261cb20cSJan Kara return 0; 1703261cb20cSJan Kara } 1704261cb20cSJan Kara } 1705d4f76107SJan Kara if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA && 1706d4f76107SJan Kara test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 1707d4f76107SJan Kara ext4_msg(sb, KERN_ERR, "can't mount with journal_async_commit " 1708d4f76107SJan Kara "in data=ordered mode"); 1709d4f76107SJan Kara return 0; 1710d4f76107SJan Kara } 1711ac27a0ecSDave Kleikamp return 1; 1712ac27a0ecSDave Kleikamp } 1713ac27a0ecSDave Kleikamp 17142adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17152adf6da8STheodore Ts'o struct super_block *sb) 17162adf6da8STheodore Ts'o { 17172adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17182adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17192adf6da8STheodore Ts'o 17202adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17212adf6da8STheodore Ts'o char *fmtname = ""; 17222adf6da8STheodore Ts'o 17232adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17242adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17252adf6da8STheodore Ts'o fmtname = "vfsold"; 17262adf6da8STheodore Ts'o break; 17272adf6da8STheodore Ts'o case QFMT_VFS_V0: 17282adf6da8STheodore Ts'o fmtname = "vfsv0"; 17292adf6da8STheodore Ts'o break; 17302adf6da8STheodore Ts'o case QFMT_VFS_V1: 17312adf6da8STheodore Ts'o fmtname = "vfsv1"; 17322adf6da8STheodore Ts'o break; 17332adf6da8STheodore Ts'o } 17342adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17352adf6da8STheodore Ts'o } 17362adf6da8STheodore Ts'o 17372adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17382adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17392adf6da8STheodore Ts'o 17402adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17412adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17422adf6da8STheodore Ts'o #endif 17432adf6da8STheodore Ts'o } 17442adf6da8STheodore Ts'o 17455a916be1STheodore Ts'o static const char *token2str(int token) 17465a916be1STheodore Ts'o { 174750df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17485a916be1STheodore Ts'o 17495a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17505a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17515a916be1STheodore Ts'o break; 17525a916be1STheodore Ts'o return t->pattern; 17535a916be1STheodore Ts'o } 17545a916be1STheodore Ts'o 17552adf6da8STheodore Ts'o /* 17562adf6da8STheodore Ts'o * Show an option if 17572adf6da8STheodore Ts'o * - it's set to a non-default value OR 17582adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17592adf6da8STheodore Ts'o */ 176066acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 176166acdcf4STheodore Ts'o int nodefs) 17622adf6da8STheodore Ts'o { 17632adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17642adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 176566acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17665a916be1STheodore Ts'o const struct mount_opts *m; 176766acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17682adf6da8STheodore Ts'o 176966acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 177066acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17712adf6da8STheodore Ts'o 17722adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17735a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17745a916be1STheodore Ts'o 17755a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17765a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17775a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17785a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17795a916be1STheodore Ts'o continue; 178066acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 17815a916be1STheodore Ts'o continue; /* skip if same as the default */ 17825a916be1STheodore Ts'o if ((want_set && 17835a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 17845a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 17855a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 17865a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 17875a916be1STheodore Ts'o } 17885a916be1STheodore Ts'o 178908cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 17905a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 179108cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 179208cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 179308cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 17945a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 179508cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 179608cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 179766acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 17985a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 17995a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18002adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18015a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18022adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18035a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 180466acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18055a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 180666acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18075a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 180866acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18095a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18102adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18115a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 181266acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18135a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 181466acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18152adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18165a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18172adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18185a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18192adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18205a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18215a916be1STheodore Ts'o } 182266acdcf4STheodore Ts'o if (nodefs || 182366acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18245a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18252adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18262adf6da8STheodore Ts'o 182766acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 182866acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18295a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1830df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1831df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18322adf6da8STheodore Ts'o 18332adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18342adf6da8STheodore Ts'o return 0; 18352adf6da8STheodore Ts'o } 18362adf6da8STheodore Ts'o 183766acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 183866acdcf4STheodore Ts'o { 183966acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 184066acdcf4STheodore Ts'o } 184166acdcf4STheodore Ts'o 184266acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 184366acdcf4STheodore Ts'o { 184466acdcf4STheodore Ts'o struct super_block *sb = seq->private; 184566acdcf4STheodore Ts'o int rc; 184666acdcf4STheodore Ts'o 184766acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 184866acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 184966acdcf4STheodore Ts'o seq_puts(seq, "\n"); 185066acdcf4STheodore Ts'o return rc; 185166acdcf4STheodore Ts'o } 185266acdcf4STheodore Ts'o 185366acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 185466acdcf4STheodore Ts'o { 1855d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 185666acdcf4STheodore Ts'o } 185766acdcf4STheodore Ts'o 185866acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 185966acdcf4STheodore Ts'o .owner = THIS_MODULE, 186066acdcf4STheodore Ts'o .open = options_open_fs, 186166acdcf4STheodore Ts'o .read = seq_read, 186266acdcf4STheodore Ts'o .llseek = seq_lseek, 186366acdcf4STheodore Ts'o .release = single_release, 186466acdcf4STheodore Ts'o }; 186566acdcf4STheodore Ts'o 1866617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1867ac27a0ecSDave Kleikamp int read_only) 1868ac27a0ecSDave Kleikamp { 1869617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1870ac27a0ecSDave Kleikamp int res = 0; 1871ac27a0ecSDave Kleikamp 1872617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1873b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1874b31e1552SEric Sandeen "forcing read-only mode"); 1875ac27a0ecSDave Kleikamp res = MS_RDONLY; 1876ac27a0ecSDave Kleikamp } 1877ac27a0ecSDave Kleikamp if (read_only) 1878281b5995STheodore Ts'o goto done; 1879617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1880b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1881b31e1552SEric Sandeen "running e2fsck is recommended"); 1882c8b459f4SLukas Czerner else if (sbi->s_mount_state & EXT4_ERROR_FS) 1883b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1884b31e1552SEric Sandeen "warning: mounting fs with errors, " 1885b31e1552SEric Sandeen "running e2fsck is recommended"); 1886ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1887ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1888ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1889b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1890b31e1552SEric Sandeen "warning: maximal mount count reached, " 1891b31e1552SEric Sandeen "running e2fsck is recommended"); 1892ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1893ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1894ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1895b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1896b31e1552SEric Sandeen "warning: checktime reached, " 1897b31e1552SEric Sandeen "running e2fsck is recommended"); 18980390131bSFrank Mayhar if (!sbi->s_journal) 1899216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1900ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1901617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1902e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1903ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1904617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19050390131bSFrank Mayhar if (sbi->s_journal) 1906617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1907ac27a0ecSDave Kleikamp 1908e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1909281b5995STheodore Ts'o done: 1910ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1911a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1912a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1913ac27a0ecSDave Kleikamp sb->s_blocksize, 1914ac27a0ecSDave Kleikamp sbi->s_groups_count, 1915617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1916617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1917a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1918ac27a0ecSDave Kleikamp 19197abc52c2SDan Magenheimer cleancache_init_fs(sb); 1920ac27a0ecSDave Kleikamp return res; 1921ac27a0ecSDave Kleikamp } 1922ac27a0ecSDave Kleikamp 1923117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1924117fff10STheodore Ts'o { 1925117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1926117fff10STheodore Ts'o struct flex_groups *new_groups; 1927117fff10STheodore Ts'o int size; 1928117fff10STheodore Ts'o 1929117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1930117fff10STheodore Ts'o return 0; 1931117fff10STheodore Ts'o 1932117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1933117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1934117fff10STheodore Ts'o return 0; 1935117fff10STheodore Ts'o 1936117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1937117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1938117fff10STheodore Ts'o if (!new_groups) { 1939117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1940117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1941117fff10STheodore Ts'o return -ENOMEM; 1942117fff10STheodore Ts'o } 1943117fff10STheodore Ts'o 1944117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1945117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1946117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1947117fff10STheodore Ts'o sizeof(struct flex_groups))); 1948b93b41d4SAl Viro kvfree(sbi->s_flex_groups); 1949117fff10STheodore Ts'o } 1950117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1951117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1952117fff10STheodore Ts'o return 0; 1953117fff10STheodore Ts'o } 1954117fff10STheodore Ts'o 1955772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1956772cb7c8SJose R. Santos { 1957772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1958772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1959772cb7c8SJose R. Santos ext4_group_t flex_group; 1960117fff10STheodore Ts'o int i, err; 1961772cb7c8SJose R. Santos 1962503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1963d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1964772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1965772cb7c8SJose R. Santos return 1; 1966772cb7c8SJose R. Santos } 1967772cb7c8SJose R. Santos 1968117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1969117fff10STheodore Ts'o if (err) 1970772cb7c8SJose R. Santos goto failed; 1971772cb7c8SJose R. Santos 1972772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 197388b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1974772cb7c8SJose R. Santos 1975772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19767ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19777ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 197890ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 197924aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19807ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19817ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1982772cb7c8SJose R. Santos } 1983772cb7c8SJose R. Santos 1984772cb7c8SJose R. Santos return 1; 1985772cb7c8SJose R. Santos failed: 1986772cb7c8SJose R. Santos return 0; 1987772cb7c8SJose R. Santos } 1988772cb7c8SJose R. Santos 1989feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1990717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1991717d50e4SAndreas Dilger { 1992feb0ab32SDarrick J. Wong int offset; 1993717d50e4SAndreas Dilger __u16 crc = 0; 1994717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1995717d50e4SAndreas Dilger 19969aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sbi->s_sb)) { 1997feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 1998d6a77105STheodore Ts'o __le16 save_csum; 1999feb0ab32SDarrick J. Wong __u32 csum32; 2000feb0ab32SDarrick J. Wong 2001d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 2002feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2003feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2004feb0ab32SDarrick J. Wong sizeof(le_group)); 2005feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2006feb0ab32SDarrick J. Wong sbi->s_desc_size); 2007d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2008feb0ab32SDarrick J. Wong 2009feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2010feb0ab32SDarrick J. Wong goto out; 2011feb0ab32SDarrick J. Wong } 2012feb0ab32SDarrick J. Wong 2013feb0ab32SDarrick J. Wong /* old crc16 code */ 2014813d32f9SDarrick J. Wong if (!(sbi->s_es->s_feature_ro_compat & 2015813d32f9SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM))) 2016813d32f9SDarrick J. Wong return 0; 2017813d32f9SDarrick J. Wong 2018feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2019feb0ab32SDarrick J. Wong 2020717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2021717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2022717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2023717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2024717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2025717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2026717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2027717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2028717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2029717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2030717d50e4SAndreas Dilger offset); 2031717d50e4SAndreas Dilger 2032feb0ab32SDarrick J. Wong out: 2033717d50e4SAndreas Dilger return cpu_to_le16(crc); 2034717d50e4SAndreas Dilger } 2035717d50e4SAndreas Dilger 2036feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2037717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2038717d50e4SAndreas Dilger { 2039feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2040feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2041feb0ab32SDarrick J. Wong block_group, gdp))) 2042717d50e4SAndreas Dilger return 0; 2043717d50e4SAndreas Dilger 2044717d50e4SAndreas Dilger return 1; 2045717d50e4SAndreas Dilger } 2046717d50e4SAndreas Dilger 2047feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2048feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2049feb0ab32SDarrick J. Wong { 2050feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2051feb0ab32SDarrick J. Wong return; 2052feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2053feb0ab32SDarrick J. Wong } 2054feb0ab32SDarrick J. Wong 2055ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2056bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2057bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2058ac27a0ecSDave Kleikamp { 2059617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2060617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2061617ba13bSMingming Cao ext4_fsblk_t last_block; 2062bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2063bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2064bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2065ce421581SJose R. Santos int flexbg_flag = 0; 2066bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2067ac27a0ecSDave Kleikamp 2068ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2069ce421581SJose R. Santos flexbg_flag = 1; 2070ce421581SJose R. Santos 2071617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2072ac27a0ecSDave Kleikamp 2073197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2074197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2075197cd65aSAkinobu Mita 2076ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2077bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2078ac27a0ecSDave Kleikamp else 2079ac27a0ecSDave Kleikamp last_block = first_block + 2080617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2081ac27a0ecSDave Kleikamp 2082bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2083bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2084bfff6873SLukas Czerner grp = i; 2085bfff6873SLukas Czerner 20868fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20872b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2088b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2089a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2090b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2091ac27a0ecSDave Kleikamp return 0; 2092ac27a0ecSDave Kleikamp } 20938fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20942b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2095b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2096a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2097b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2098ac27a0ecSDave Kleikamp return 0; 2099ac27a0ecSDave Kleikamp } 21008fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2101bd81d8eeSLaurent Vivier if (inode_table < first_block || 21022b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2103b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2104a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2105b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2106ac27a0ecSDave Kleikamp return 0; 2107ac27a0ecSDave Kleikamp } 2108955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2109feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2110b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2111b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2112fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2113fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21147ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2115955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2116717d50e4SAndreas Dilger return 0; 2117717d50e4SAndreas Dilger } 21187ee1ec4cSLi Zefan } 2119955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2120ce421581SJose R. Santos if (!flexbg_flag) 2121617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2122ac27a0ecSDave Kleikamp } 2123bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2124bfff6873SLukas Czerner *first_not_zeroed = grp; 2125ac27a0ecSDave Kleikamp return 1; 2126ac27a0ecSDave Kleikamp } 2127ac27a0ecSDave Kleikamp 2128617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2129ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2130ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2131ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2132ac27a0ecSDave Kleikamp * 2133ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2134ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2135ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2136ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2137ac27a0ecSDave Kleikamp * 2138ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2139ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2140ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2141617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2142ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2143ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2144ac27a0ecSDave Kleikamp */ 2145617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2146617ba13bSMingming Cao struct ext4_super_block *es) 2147ac27a0ecSDave Kleikamp { 2148ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2149ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2150ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2151ac27a0ecSDave Kleikamp int i; 2152ac27a0ecSDave Kleikamp #endif 2153ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2154ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2155ac27a0ecSDave Kleikamp return; 2156ac27a0ecSDave Kleikamp } 2157ac27a0ecSDave Kleikamp 2158a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2159b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2160b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2161a8f48a95SEric Sandeen return; 2162a8f48a95SEric Sandeen } 2163a8f48a95SEric Sandeen 2164d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2165d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2166d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2167d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2168d39195c3SAmir Goldstein return; 2169d39195c3SAmir Goldstein } 2170d39195c3SAmir Goldstein 2171617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2172c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2173c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 217484474976SDmitry Monakhov ext4_msg(sb, KERN_INFO, "Errors on filesystem, " 2175ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2176ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2177c25f9bc6SEric Sandeen } 2178ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2179ac27a0ecSDave Kleikamp return; 2180ac27a0ecSDave Kleikamp } 2181ac27a0ecSDave Kleikamp 2182ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2183b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2184ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2185ac27a0ecSDave Kleikamp } 2186ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2187ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2188ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2189ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2190a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2191617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2192617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2193ac27a0ecSDave Kleikamp if (ret < 0) 2194b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2195b31e1552SEric Sandeen "Cannot turn on journaled " 2196b31e1552SEric Sandeen "quota: error %d", ret); 2197ac27a0ecSDave Kleikamp } 2198ac27a0ecSDave Kleikamp } 2199ac27a0ecSDave Kleikamp #endif 2200ac27a0ecSDave Kleikamp 2201ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2202ac27a0ecSDave Kleikamp struct inode *inode; 2203ac27a0ecSDave Kleikamp 220497bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 220597bd42b9SJosef Bacik if (IS_ERR(inode)) { 2206ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2207ac27a0ecSDave Kleikamp break; 2208ac27a0ecSDave Kleikamp } 2209ac27a0ecSDave Kleikamp 2210617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2211871a2931SChristoph Hellwig dquot_initialize(inode); 2212ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2213566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2214b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2215b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 221646e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2217e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2218ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2219721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 222055f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2221617ba13bSMingming Cao ext4_truncate(inode); 2222721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2223ac27a0ecSDave Kleikamp nr_truncates++; 2224ac27a0ecSDave Kleikamp } else { 2225566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2226b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2227b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 222846e665e9SHarvey Harrison __func__, inode->i_ino); 2229ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2230ac27a0ecSDave Kleikamp inode->i_ino); 2231ac27a0ecSDave Kleikamp nr_orphans++; 2232ac27a0ecSDave Kleikamp } 2233ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2234ac27a0ecSDave Kleikamp } 2235ac27a0ecSDave Kleikamp 2236ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2237ac27a0ecSDave Kleikamp 2238ac27a0ecSDave Kleikamp if (nr_orphans) 2239b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2240b31e1552SEric Sandeen PLURAL(nr_orphans)); 2241ac27a0ecSDave Kleikamp if (nr_truncates) 2242b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2243b31e1552SEric Sandeen PLURAL(nr_truncates)); 2244ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2245ac27a0ecSDave Kleikamp /* Turn quotas off */ 2246a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 2247ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2248287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2249ac27a0ecSDave Kleikamp } 2250ac27a0ecSDave Kleikamp #endif 2251ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2252ac27a0ecSDave Kleikamp } 22530b8e58a1SAndreas Dilger 2254cd2291a4SEric Sandeen /* 2255cd2291a4SEric Sandeen * Maximal extent format file size. 2256cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2257cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2258cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2259cd2291a4SEric Sandeen * so that won't be a limiting factor. 2260cd2291a4SEric Sandeen * 2261f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2262f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2263f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2264f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2265f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2266f17722f9SLukas Czerner * 2267cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2268cd2291a4SEric Sandeen */ 2269f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2270cd2291a4SEric Sandeen { 2271cd2291a4SEric Sandeen loff_t res; 2272cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2273cd2291a4SEric Sandeen 2274cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2275f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2276cd2291a4SEric Sandeen /* 227790c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2278cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2279cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2280cd2291a4SEric Sandeen */ 2281cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2282cd2291a4SEric Sandeen 2283cd2291a4SEric Sandeen /* total blocks in file system block size */ 2284cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2285cd2291a4SEric Sandeen upper_limit <<= blkbits; 2286cd2291a4SEric Sandeen } 2287cd2291a4SEric Sandeen 2288f17722f9SLukas Czerner /* 2289f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2290f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2291f17722f9SLukas Czerner * size 2292f17722f9SLukas Czerner */ 2293f17722f9SLukas Czerner res = (1LL << 32) - 1; 2294cd2291a4SEric Sandeen res <<= blkbits; 2295cd2291a4SEric Sandeen 2296cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2297cd2291a4SEric Sandeen if (res > upper_limit) 2298cd2291a4SEric Sandeen res = upper_limit; 2299cd2291a4SEric Sandeen 2300cd2291a4SEric Sandeen return res; 2301cd2291a4SEric Sandeen } 2302ac27a0ecSDave Kleikamp 2303ac27a0ecSDave Kleikamp /* 2304cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23050fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23060fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2307ac27a0ecSDave Kleikamp */ 2308f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2309ac27a0ecSDave Kleikamp { 2310617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23110fc1b451SAneesh Kumar K.V int meta_blocks; 23120fc1b451SAneesh Kumar K.V loff_t upper_limit; 23130b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23140b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23150b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23160b8e58a1SAndreas Dilger * 23170b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23180b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23190fc1b451SAneesh Kumar K.V */ 23200fc1b451SAneesh Kumar K.V 2321f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23220fc1b451SAneesh Kumar K.V /* 232390c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23240b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23250b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23260fc1b451SAneesh Kumar K.V */ 23270fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23280fc1b451SAneesh Kumar K.V 23290fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23300fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23310fc1b451SAneesh Kumar K.V 23320fc1b451SAneesh Kumar K.V } else { 23338180a562SAneesh Kumar K.V /* 23348180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23358180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23368180a562SAneesh Kumar K.V * represent total number of blocks in 23378180a562SAneesh Kumar K.V * file system block size 23388180a562SAneesh Kumar K.V */ 23390fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23400fc1b451SAneesh Kumar K.V 23410fc1b451SAneesh Kumar K.V } 23420fc1b451SAneesh Kumar K.V 23430fc1b451SAneesh Kumar K.V /* indirect blocks */ 23440fc1b451SAneesh Kumar K.V meta_blocks = 1; 23450fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23460fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23470fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23480fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23490fc1b451SAneesh Kumar K.V 23500fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23510fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2352ac27a0ecSDave Kleikamp 2353ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2354ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2355ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2356ac27a0ecSDave Kleikamp res <<= bits; 2357ac27a0ecSDave Kleikamp if (res > upper_limit) 2358ac27a0ecSDave Kleikamp res = upper_limit; 23590fc1b451SAneesh Kumar K.V 23600fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23610fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23620fc1b451SAneesh Kumar K.V 2363ac27a0ecSDave Kleikamp return res; 2364ac27a0ecSDave Kleikamp } 2365ac27a0ecSDave Kleikamp 2366617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 236770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2368ac27a0ecSDave Kleikamp { 2369617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2370fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2371ac27a0ecSDave Kleikamp int has_super = 0; 2372ac27a0ecSDave Kleikamp 2373ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2374ac27a0ecSDave Kleikamp 2375617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2376ac27a0ecSDave Kleikamp nr < first_meta_bg) 237770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2378ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2379617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2380ac27a0ecSDave Kleikamp has_super = 1; 23810b8e58a1SAndreas Dilger 2382bd63f6b0SDarrick J. Wong /* 2383bd63f6b0SDarrick J. Wong * If we have a meta_bg fs with 1k blocks, group 0's GDT is at 2384bd63f6b0SDarrick J. Wong * block 2, not 1. If s_first_data_block == 0 (bigalloc is enabled 2385bd63f6b0SDarrick J. Wong * on modern mke2fs or blksize > 1k on older mke2fs) then we must 2386bd63f6b0SDarrick J. Wong * compensate. 2387bd63f6b0SDarrick J. Wong */ 2388bd63f6b0SDarrick J. Wong if (sb->s_blocksize == 1024 && nr == 0 && 2389bd63f6b0SDarrick J. Wong le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block) == 0) 2390bd63f6b0SDarrick J. Wong has_super++; 2391bd63f6b0SDarrick J. Wong 2392617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2393ac27a0ecSDave Kleikamp } 2394ac27a0ecSDave Kleikamp 2395c9de560dSAlex Tomas /** 2396c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2397c9de560dSAlex Tomas * @sbi: In memory super block info 2398c9de560dSAlex Tomas * 2399c9de560dSAlex Tomas * If we have specified it via mount option, then 2400c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2401c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2402c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2403c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2404c9de560dSAlex Tomas * 2405c9de560dSAlex Tomas */ 2406c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2407c9de560dSAlex Tomas { 2408c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2409c9de560dSAlex Tomas unsigned long stripe_width = 2410c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24113eb08658SDan Ehrenberg int ret; 2412c9de560dSAlex Tomas 2413c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24143eb08658SDan Ehrenberg ret = sbi->s_stripe; 24153eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24163eb08658SDan Ehrenberg ret = stripe_width; 24173eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24183eb08658SDan Ehrenberg ret = stride; 24193eb08658SDan Ehrenberg else 24203eb08658SDan Ehrenberg ret = 0; 2421c9de560dSAlex Tomas 24223eb08658SDan Ehrenberg /* 24233eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24243eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24253eb08658SDan Ehrenberg */ 24263eb08658SDan Ehrenberg if (ret <= 1) 24273eb08658SDan Ehrenberg ret = 0; 2428c9de560dSAlex Tomas 24293eb08658SDan Ehrenberg return ret; 2430c9de560dSAlex Tomas } 2431ac27a0ecSDave Kleikamp 24323197ebdbSTheodore Ts'o /* sysfs supprt */ 24333197ebdbSTheodore Ts'o 24343197ebdbSTheodore Ts'o struct ext4_attr { 24353197ebdbSTheodore Ts'o struct attribute attr; 24363197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24373197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24383197ebdbSTheodore Ts'o const char *, size_t); 2439f2d50a65SJan Kara union { 24403197ebdbSTheodore Ts'o int offset; 2441f2d50a65SJan Kara int deprecated_val; 2442f2d50a65SJan Kara } u; 24433197ebdbSTheodore Ts'o }; 24443197ebdbSTheodore Ts'o 244527dd4385SLukas Czerner static int parse_strtoull(const char *buf, 244627dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 244727dd4385SLukas Czerner { 244827dd4385SLukas Czerner int ret; 244927dd4385SLukas Czerner 245027dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 245127dd4385SLukas Czerner if (!ret && *value > max) 245227dd4385SLukas Czerner ret = -EINVAL; 245327dd4385SLukas Czerner return ret; 245427dd4385SLukas Czerner } 245527dd4385SLukas Czerner 24563197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24573197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24583197ebdbSTheodore Ts'o char *buf) 24593197ebdbSTheodore Ts'o { 24603197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24617b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24627b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24633197ebdbSTheodore Ts'o } 24643197ebdbSTheodore Ts'o 24653197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24663197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24673197ebdbSTheodore Ts'o { 24683197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24693197ebdbSTheodore Ts'o 2470f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2471f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24723197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24733197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24743197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24753197ebdbSTheodore Ts'o } 24763197ebdbSTheodore Ts'o 24773197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24783197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24793197ebdbSTheodore Ts'o { 24803197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24813197ebdbSTheodore Ts'o 2482f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2483f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24843197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2485a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24863197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2487a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24883197ebdbSTheodore Ts'o } 24893197ebdbSTheodore Ts'o 24903197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24913197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24923197ebdbSTheodore Ts'o const char *buf, size_t count) 24933197ebdbSTheodore Ts'o { 24943197ebdbSTheodore Ts'o unsigned long t; 2495e1091b15SLukas Czerner int ret; 24963197ebdbSTheodore Ts'o 2497e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2498e1091b15SLukas Czerner if (ret) 2499e1091b15SLukas Czerner return ret; 25003197ebdbSTheodore Ts'o 2501e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 25023197ebdbSTheodore Ts'o return -EINVAL; 25033197ebdbSTheodore Ts'o 25043197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25053197ebdbSTheodore Ts'o return count; 25063197ebdbSTheodore Ts'o } 25073197ebdbSTheodore Ts'o 25083197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25093197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25103197ebdbSTheodore Ts'o { 2511f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25123197ebdbSTheodore Ts'o 25133197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25143197ebdbSTheodore Ts'o } 25153197ebdbSTheodore Ts'o 25163197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25173197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25183197ebdbSTheodore Ts'o const char *buf, size_t count) 25193197ebdbSTheodore Ts'o { 2520f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25213197ebdbSTheodore Ts'o unsigned long t; 2522e1091b15SLukas Czerner int ret; 25233197ebdbSTheodore Ts'o 2524e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2525e1091b15SLukas Czerner if (ret) 2526e1091b15SLukas Czerner return ret; 25273197ebdbSTheodore Ts'o *ui = t; 25283197ebdbSTheodore Ts'o return count; 25293197ebdbSTheodore Ts'o } 25303197ebdbSTheodore Ts'o 253152c198c6SLukas Czerner static ssize_t es_ui_show(struct ext4_attr *a, 253252c198c6SLukas Czerner struct ext4_sb_info *sbi, char *buf) 253352c198c6SLukas Czerner { 253452c198c6SLukas Czerner 253552c198c6SLukas Czerner unsigned int *ui = (unsigned int *) (((char *) sbi->s_es) + 253652c198c6SLukas Czerner a->u.offset); 253752c198c6SLukas Czerner 253852c198c6SLukas Czerner return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 253952c198c6SLukas Czerner } 254052c198c6SLukas Czerner 254127dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 254227dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 254327dd4385SLukas Czerner { 254427dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 254527dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 254627dd4385SLukas Czerner } 254727dd4385SLukas Czerner 254827dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 254927dd4385SLukas Czerner struct ext4_sb_info *sbi, 255027dd4385SLukas Czerner const char *buf, size_t count) 255127dd4385SLukas Czerner { 255227dd4385SLukas Czerner unsigned long long val; 255327dd4385SLukas Czerner int ret; 255427dd4385SLukas Czerner 255527dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 255627dd4385SLukas Czerner return -EINVAL; 255727dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 255827dd4385SLukas Czerner 255927dd4385SLukas Czerner return ret ? ret : count; 256027dd4385SLukas Czerner } 256127dd4385SLukas Czerner 25622c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25632c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25642c0544b2STheodore Ts'o const char *buf, size_t count) 25652c0544b2STheodore Ts'o { 25662c0544b2STheodore Ts'o int len = count; 25672c0544b2STheodore Ts'o 25682c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25692c0544b2STheodore Ts'o return -EPERM; 25702c0544b2STheodore Ts'o 25712c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25722c0544b2STheodore Ts'o len--; 25732c0544b2STheodore Ts'o 25742c0544b2STheodore Ts'o if (len) 25752c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25762c0544b2STheodore Ts'o return count; 25772c0544b2STheodore Ts'o } 25782c0544b2STheodore Ts'o 2579f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2580f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2581f2d50a65SJan Kara { 2582f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2583f2d50a65SJan Kara } 2584f2d50a65SJan Kara 25853197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25863197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25873197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25883197ebdbSTheodore Ts'o .show = _show, \ 25893197ebdbSTheodore Ts'o .store = _store, \ 2590f2d50a65SJan Kara .u = { \ 25913197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2592f2d50a65SJan Kara }, \ 25933197ebdbSTheodore Ts'o } 259452c198c6SLukas Czerner 259552c198c6SLukas Czerner #define EXT4_ATTR_OFFSET_ES(_name,_mode,_show,_store,_elname) \ 259652c198c6SLukas Czerner static struct ext4_attr ext4_attr_##_name = { \ 259752c198c6SLukas Czerner .attr = {.name = __stringify(_name), .mode = _mode }, \ 259852c198c6SLukas Czerner .show = _show, \ 259952c198c6SLukas Czerner .store = _store, \ 260052c198c6SLukas Czerner .u = { \ 260152c198c6SLukas Czerner .offset = offsetof(struct ext4_super_block, _elname), \ 260252c198c6SLukas Czerner }, \ 260352c198c6SLukas Czerner } 260452c198c6SLukas Czerner 26053197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 26063197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 26073197ebdbSTheodore Ts'o 2608857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 26093197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 26103197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 261152c198c6SLukas Czerner 261252c198c6SLukas Czerner #define EXT4_RO_ATTR_ES_UI(name, elname) \ 261352c198c6SLukas Czerner EXT4_ATTR_OFFSET_ES(name, 0444, es_ui_show, NULL, elname) 26143197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26153197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 261652c198c6SLukas Czerner 26173197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2618f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2619f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2620f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2621f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2622f2d50a65SJan Kara .u = { \ 2623f2d50a65SJan Kara .deprecated_val = _val, \ 2624f2d50a65SJan Kara }, \ 2625f2d50a65SJan Kara } 26263197ebdbSTheodore Ts'o 26273197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26283197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26293197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 263027dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26313197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26323197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 263311013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26343197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26353197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26363197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26373197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26383197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26393197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2640f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 264167a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26422c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2643efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2644efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2645efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2646efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2647efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2648efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 264952c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(errors_count, s_error_count); 265052c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(first_error_time, s_first_error_time); 265152c198c6SLukas Czerner EXT4_RO_ATTR_ES_UI(last_error_time, s_last_error_time); 26523197ebdbSTheodore Ts'o 26533197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26543197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26553197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26563197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 265727dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26583197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 265911013911SAndreas Dilger ATTR_LIST(inode_goal), 26603197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26613197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26623197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26633197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26643197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26653197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 266655138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 266767a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26682c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2669efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2670efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2671efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2672efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2673efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2674efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 267552c198c6SLukas Czerner ATTR_LIST(errors_count), 267652c198c6SLukas Czerner ATTR_LIST(first_error_time), 267752c198c6SLukas Czerner ATTR_LIST(last_error_time), 26783197ebdbSTheodore Ts'o NULL, 26793197ebdbSTheodore Ts'o }; 26803197ebdbSTheodore Ts'o 2681857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2682857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 268327ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26845e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2685*6ddb2447STheodore Ts'o EXT4_INFO_ATTR(encryption); 2686857ac889SLukas Czerner 2687857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2688857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 268927ee40dfSLukas Czerner ATTR_LIST(batched_discard), 26905e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2691*6ddb2447STheodore Ts'o ATTR_LIST(encryption), 2692857ac889SLukas Czerner NULL, 2693857ac889SLukas Czerner }; 2694857ac889SLukas Czerner 26953197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26963197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26973197ebdbSTheodore Ts'o { 26983197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26993197ebdbSTheodore Ts'o s_kobj); 27003197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27013197ebdbSTheodore Ts'o 27023197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 27033197ebdbSTheodore Ts'o } 27043197ebdbSTheodore Ts'o 27053197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 27063197ebdbSTheodore Ts'o struct attribute *attr, 27073197ebdbSTheodore Ts'o const char *buf, size_t len) 27083197ebdbSTheodore Ts'o { 27093197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27103197ebdbSTheodore Ts'o s_kobj); 27113197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 27123197ebdbSTheodore Ts'o 27133197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 27143197ebdbSTheodore Ts'o } 27153197ebdbSTheodore Ts'o 27163197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 27173197ebdbSTheodore Ts'o { 27183197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 27193197ebdbSTheodore Ts'o s_kobj); 27203197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 27213197ebdbSTheodore Ts'o } 27223197ebdbSTheodore Ts'o 272352cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27243197ebdbSTheodore Ts'o .show = ext4_attr_show, 27253197ebdbSTheodore Ts'o .store = ext4_attr_store, 27263197ebdbSTheodore Ts'o }; 27273197ebdbSTheodore Ts'o 27283197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27293197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27303197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27313197ebdbSTheodore Ts'o .release = ext4_sb_release, 27323197ebdbSTheodore Ts'o }; 27333197ebdbSTheodore Ts'o 2734857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2735857ac889SLukas Czerner { 2736857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2737857ac889SLukas Czerner } 2738857ac889SLukas Czerner 2739c7f72543SLukas Czerner static ssize_t ext4_feat_show(struct kobject *kobj, 2740c7f72543SLukas Czerner struct attribute *attr, char *buf) 2741c7f72543SLukas Czerner { 2742c7f72543SLukas Czerner return snprintf(buf, PAGE_SIZE, "supported\n"); 2743c7f72543SLukas Czerner } 2744c7f72543SLukas Czerner 2745c7f72543SLukas Czerner /* 2746c7f72543SLukas Czerner * We can not use ext4_attr_show/store because it relies on the kobject 2747c7f72543SLukas Czerner * being embedded in the ext4_sb_info structure which is definitely not 2748c7f72543SLukas Czerner * true in this case. 2749c7f72543SLukas Czerner */ 2750c7f72543SLukas Czerner static const struct sysfs_ops ext4_feat_ops = { 2751c7f72543SLukas Czerner .show = ext4_feat_show, 2752c7f72543SLukas Czerner .store = NULL, 2753c7f72543SLukas Czerner }; 2754c7f72543SLukas Czerner 2755857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2756857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2757c7f72543SLukas Czerner .sysfs_ops = &ext4_feat_ops, 2758857ac889SLukas Czerner .release = ext4_feat_release, 2759857ac889SLukas Czerner }; 2760857ac889SLukas Czerner 2761a13fb1a4SEric Sandeen /* 2762a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2763a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2764a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2765a13fb1a4SEric Sandeen * 0 if it cannot be. 2766a13fb1a4SEric Sandeen */ 2767a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2768a13fb1a4SEric Sandeen { 2769a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2770a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2771a13fb1a4SEric Sandeen "Couldn't mount because of " 2772a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2773a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2774a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2775a13fb1a4SEric Sandeen return 0; 2776a13fb1a4SEric Sandeen } 2777a13fb1a4SEric Sandeen 2778a13fb1a4SEric Sandeen if (readonly) 2779a13fb1a4SEric Sandeen return 1; 2780a13fb1a4SEric Sandeen 27812cb5cc8bSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_READONLY)) { 27822cb5cc8bSDarrick J. Wong ext4_msg(sb, KERN_INFO, "filesystem is read-only"); 27832cb5cc8bSDarrick J. Wong sb->s_flags |= MS_RDONLY; 27842cb5cc8bSDarrick J. Wong return 1; 27852cb5cc8bSDarrick J. Wong } 27862cb5cc8bSDarrick J. Wong 2787a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2788a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2789a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2790a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2791a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2792a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2793a13fb1a4SEric Sandeen return 0; 2794a13fb1a4SEric Sandeen } 2795a13fb1a4SEric Sandeen /* 2796a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2797a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2798a13fb1a4SEric Sandeen */ 2799a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2800a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2801a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2802a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2803a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2804a13fb1a4SEric Sandeen return 0; 2805a13fb1a4SEric Sandeen } 2806a13fb1a4SEric Sandeen } 2807bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2808bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2809bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2810bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2811bab08ab9STheodore Ts'o "extents feature\n"); 2812bab08ab9STheodore Ts'o return 0; 2813bab08ab9STheodore Ts'o } 28147c319d32SAditya Kali 28157c319d32SAditya Kali #ifndef CONFIG_QUOTA 28167c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 28177c319d32SAditya Kali !readonly) { 28187c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 28197c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 28207c319d32SAditya Kali "without CONFIG_QUOTA"); 28217c319d32SAditya Kali return 0; 28227c319d32SAditya Kali } 28237c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2824a13fb1a4SEric Sandeen return 1; 2825a13fb1a4SEric Sandeen } 2826a13fb1a4SEric Sandeen 282766e61a9eSTheodore Ts'o /* 282866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 282966e61a9eSTheodore Ts'o * on the file system 283066e61a9eSTheodore Ts'o */ 283166e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 283266e61a9eSTheodore Ts'o { 283366e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 283466e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 283566e61a9eSTheodore Ts'o struct ext4_super_block *es; 283666e61a9eSTheodore Ts'o 283766e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 283866e61a9eSTheodore Ts'o es = sbi->s_es; 283966e61a9eSTheodore Ts'o 284066e61a9eSTheodore Ts'o if (es->s_error_count) 2841ae0f78deSTheodore Ts'o /* fsck newer than v1.41.13 is needed to clean this condition. */ 2842ae0f78deSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count since last fsck: %u", 284366e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 284466e61a9eSTheodore Ts'o if (es->s_first_error_time) { 2845ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at time %u: %.*s:%d", 284666e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 284766e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 284866e61a9eSTheodore Ts'o es->s_first_error_func, 284966e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 285066e61a9eSTheodore Ts'o if (es->s_first_error_ino) 285166e61a9eSTheodore Ts'o printk(": inode %u", 285266e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 285366e61a9eSTheodore Ts'o if (es->s_first_error_block) 285466e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 285566e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 285666e61a9eSTheodore Ts'o printk("\n"); 285766e61a9eSTheodore Ts'o } 285866e61a9eSTheodore Ts'o if (es->s_last_error_time) { 2859ae0f78deSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at time %u: %.*s:%d", 286066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 286166e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 286266e61a9eSTheodore Ts'o es->s_last_error_func, 286366e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 286466e61a9eSTheodore Ts'o if (es->s_last_error_ino) 286566e61a9eSTheodore Ts'o printk(": inode %u", 286666e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 286766e61a9eSTheodore Ts'o if (es->s_last_error_block) 286866e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 286966e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 287066e61a9eSTheodore Ts'o printk("\n"); 287166e61a9eSTheodore Ts'o } 287266e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 287366e61a9eSTheodore Ts'o } 287466e61a9eSTheodore Ts'o 2875bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2876bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2877bfff6873SLukas Czerner { 2878bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2879bfff6873SLukas Czerner ext4_group_t group, ngroups; 2880bfff6873SLukas Czerner struct super_block *sb; 2881bfff6873SLukas Czerner unsigned long timeout = 0; 2882bfff6873SLukas Czerner int ret = 0; 2883bfff6873SLukas Czerner 2884bfff6873SLukas Czerner sb = elr->lr_super; 2885bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2886bfff6873SLukas Czerner 28878e8ad8a5SJan Kara sb_start_write(sb); 2888bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2889bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2890bfff6873SLukas Czerner if (!gdp) { 2891bfff6873SLukas Czerner ret = 1; 2892bfff6873SLukas Czerner break; 2893bfff6873SLukas Czerner } 2894bfff6873SLukas Czerner 2895bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2896bfff6873SLukas Czerner break; 2897bfff6873SLukas Czerner } 2898bfff6873SLukas Czerner 28997f511862STheodore Ts'o if (group >= ngroups) 2900bfff6873SLukas Czerner ret = 1; 2901bfff6873SLukas Czerner 2902bfff6873SLukas Czerner if (!ret) { 2903bfff6873SLukas Czerner timeout = jiffies; 2904bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2905bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2906bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 290751ce6511SLukas Czerner timeout = (jiffies - timeout) * 290851ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2909bfff6873SLukas Czerner elr->lr_timeout = timeout; 2910bfff6873SLukas Czerner } 2911bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2912bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2913bfff6873SLukas Czerner } 29148e8ad8a5SJan Kara sb_end_write(sb); 2915bfff6873SLukas Czerner 2916bfff6873SLukas Czerner return ret; 2917bfff6873SLukas Czerner } 2918bfff6873SLukas Czerner 2919bfff6873SLukas Czerner /* 2920bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 29214ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2922bfff6873SLukas Czerner */ 2923bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2924bfff6873SLukas Czerner { 2925bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2926bfff6873SLukas Czerner 2927bfff6873SLukas Czerner if (!elr) 2928bfff6873SLukas Czerner return; 2929bfff6873SLukas Czerner 2930bfff6873SLukas Czerner sbi = elr->lr_sbi; 2931bfff6873SLukas Czerner 2932bfff6873SLukas Czerner list_del(&elr->lr_request); 2933bfff6873SLukas Czerner sbi->s_li_request = NULL; 2934bfff6873SLukas Czerner kfree(elr); 2935bfff6873SLukas Czerner } 2936bfff6873SLukas Czerner 2937bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2938bfff6873SLukas Czerner { 29391bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 29401bb933fbSLukas Czerner if (!ext4_li_info) { 29411bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2942bfff6873SLukas Czerner return; 29431bb933fbSLukas Czerner } 2944bfff6873SLukas Czerner 2945bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29461bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2947bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29481bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2949bfff6873SLukas Czerner } 2950bfff6873SLukas Czerner 29518f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29528f1f7453SEric Sandeen 2953bfff6873SLukas Czerner /* 2954bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2955bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2956bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2957bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2958bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2959bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2960bfff6873SLukas Czerner * next waking time and put itself into sleep. 2961bfff6873SLukas Czerner */ 2962bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2963bfff6873SLukas Czerner { 2964bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2965bfff6873SLukas Czerner struct list_head *pos, *n; 2966bfff6873SLukas Czerner struct ext4_li_request *elr; 29674ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2968bfff6873SLukas Czerner 2969bfff6873SLukas Czerner BUG_ON(NULL == eli); 2970bfff6873SLukas Czerner 2971bfff6873SLukas Czerner cont_thread: 2972bfff6873SLukas Czerner while (true) { 2973bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2974bfff6873SLukas Czerner 2975bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2976bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2977bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2978bfff6873SLukas Czerner goto exit_thread; 2979bfff6873SLukas Czerner } 2980bfff6873SLukas Czerner 2981bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2982bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2983bfff6873SLukas Czerner lr_request); 2984bfff6873SLukas Czerner 2985b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2986b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2987b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2988bfff6873SLukas Czerner ext4_remove_li_request(elr); 2989bfff6873SLukas Czerner continue; 2990bfff6873SLukas Czerner } 2991b2c78cd0STheodore Ts'o } 2992bfff6873SLukas Czerner 2993bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2994bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2995bfff6873SLukas Czerner } 2996bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2997bfff6873SLukas Czerner 2998a0acae0eSTejun Heo try_to_freeze(); 2999bfff6873SLukas Czerner 30004ed5c033SLukas Czerner cur = jiffies; 30014ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 3002f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 3003bfff6873SLukas Czerner cond_resched(); 3004bfff6873SLukas Czerner continue; 3005bfff6873SLukas Czerner } 3006bfff6873SLukas Czerner 30074ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 30084ed5c033SLukas Czerner 30098f1f7453SEric Sandeen if (kthread_should_stop()) { 30108f1f7453SEric Sandeen ext4_clear_request_list(); 30118f1f7453SEric Sandeen goto exit_thread; 30128f1f7453SEric Sandeen } 3013bfff6873SLukas Czerner } 3014bfff6873SLukas Czerner 3015bfff6873SLukas Czerner exit_thread: 3016bfff6873SLukas Czerner /* 3017bfff6873SLukas Czerner * It looks like the request list is empty, but we need 3018bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 3019bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 3020bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 3021bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 3022bfff6873SLukas Czerner * new one. 3023bfff6873SLukas Czerner */ 3024bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 3025bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 3026bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 3027bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3028bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3029bfff6873SLukas Czerner goto cont_thread; 3030bfff6873SLukas Czerner } 3031bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 3032bfff6873SLukas Czerner kfree(ext4_li_info); 3033bfff6873SLukas Czerner ext4_li_info = NULL; 3034bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3035bfff6873SLukas Czerner 3036bfff6873SLukas Czerner return 0; 3037bfff6873SLukas Czerner } 3038bfff6873SLukas Czerner 3039bfff6873SLukas Czerner static void ext4_clear_request_list(void) 3040bfff6873SLukas Czerner { 3041bfff6873SLukas Czerner struct list_head *pos, *n; 3042bfff6873SLukas Czerner struct ext4_li_request *elr; 3043bfff6873SLukas Czerner 3044bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3045bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3046bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3047bfff6873SLukas Czerner lr_request); 3048bfff6873SLukas Czerner ext4_remove_li_request(elr); 3049bfff6873SLukas Czerner } 3050bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3051bfff6873SLukas Czerner } 3052bfff6873SLukas Czerner 3053bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3054bfff6873SLukas Czerner { 30558f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30568f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30578f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30588f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3059bfff6873SLukas Czerner ext4_clear_request_list(); 3060bfff6873SLukas Czerner kfree(ext4_li_info); 3061bfff6873SLukas Czerner ext4_li_info = NULL; 306292b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3063bfff6873SLukas Czerner "initialization thread\n", 3064bfff6873SLukas Czerner err); 3065bfff6873SLukas Czerner return err; 3066bfff6873SLukas Czerner } 3067bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3068bfff6873SLukas Czerner return 0; 3069bfff6873SLukas Czerner } 3070bfff6873SLukas Czerner 3071bfff6873SLukas Czerner /* 3072bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3073bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3074bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3075bfff6873SLukas Czerner * groups and return total number of groups. 3076bfff6873SLukas Czerner */ 3077bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3078bfff6873SLukas Czerner { 3079bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3080bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3081bfff6873SLukas Czerner 3082bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3083bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3084bfff6873SLukas Czerner if (!gdp) 3085bfff6873SLukas Czerner continue; 3086bfff6873SLukas Czerner 3087bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3088bfff6873SLukas Czerner break; 3089bfff6873SLukas Czerner } 3090bfff6873SLukas Czerner 3091bfff6873SLukas Czerner return group; 3092bfff6873SLukas Czerner } 3093bfff6873SLukas Czerner 3094bfff6873SLukas Czerner static int ext4_li_info_new(void) 3095bfff6873SLukas Czerner { 3096bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3097bfff6873SLukas Czerner 3098bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3099bfff6873SLukas Czerner if (!eli) 3100bfff6873SLukas Czerner return -ENOMEM; 3101bfff6873SLukas Czerner 3102bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3103bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3104bfff6873SLukas Czerner 3105bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3106bfff6873SLukas Czerner 3107bfff6873SLukas Czerner ext4_li_info = eli; 3108bfff6873SLukas Czerner 3109bfff6873SLukas Czerner return 0; 3110bfff6873SLukas Czerner } 3111bfff6873SLukas Czerner 3112bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3113bfff6873SLukas Czerner ext4_group_t start) 3114bfff6873SLukas Czerner { 3115bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3116bfff6873SLukas Czerner struct ext4_li_request *elr; 3117bfff6873SLukas Czerner 3118bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3119bfff6873SLukas Czerner if (!elr) 3120bfff6873SLukas Czerner return NULL; 3121bfff6873SLukas Czerner 3122bfff6873SLukas Czerner elr->lr_super = sb; 3123bfff6873SLukas Czerner elr->lr_sbi = sbi; 3124bfff6873SLukas Czerner elr->lr_next_group = start; 3125bfff6873SLukas Czerner 3126bfff6873SLukas Czerner /* 3127bfff6873SLukas Czerner * Randomize first schedule time of the request to 3128bfff6873SLukas Czerner * spread the inode table initialization requests 3129bfff6873SLukas Czerner * better. 3130bfff6873SLukas Czerner */ 3131dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3132dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3133bfff6873SLukas Czerner return elr; 3134bfff6873SLukas Czerner } 3135bfff6873SLukas Czerner 31367f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3137bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3138bfff6873SLukas Czerner { 3139bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 31407f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3141bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 31426c5a6cb9SAndrew Morton int ret = 0; 3143bfff6873SLukas Czerner 31447f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 314551ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 314651ce6511SLukas Czerner /* 314751ce6511SLukas Czerner * Reset timeout so it can be computed again, because 314851ce6511SLukas Czerner * s_li_wait_mult might have changed. 314951ce6511SLukas Czerner */ 315051ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31517f511862STheodore Ts'o goto out; 315251ce6511SLukas Czerner } 3153bfff6873SLukas Czerner 3154bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3155bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 315655ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31577f511862STheodore Ts'o goto out; 3158bfff6873SLukas Czerner 3159bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31607f511862STheodore Ts'o if (!elr) { 31617f511862STheodore Ts'o ret = -ENOMEM; 31627f511862STheodore Ts'o goto out; 31637f511862STheodore Ts'o } 3164bfff6873SLukas Czerner 3165bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3166bfff6873SLukas Czerner ret = ext4_li_info_new(); 3167bfff6873SLukas Czerner if (ret) 3168bfff6873SLukas Czerner goto out; 3169bfff6873SLukas Czerner } 3170bfff6873SLukas Czerner 3171bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3172bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3173bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3174bfff6873SLukas Czerner 3175bfff6873SLukas Czerner sbi->s_li_request = elr; 317646e4690bSTao Ma /* 317746e4690bSTao Ma * set elr to NULL here since it has been inserted to 317846e4690bSTao Ma * the request_list and the removal and free of it is 317946e4690bSTao Ma * handled by ext4_clear_request_list from now on. 318046e4690bSTao Ma */ 318146e4690bSTao Ma elr = NULL; 3182bfff6873SLukas Czerner 3183bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3184bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3185bfff6873SLukas Czerner if (ret) 3186bfff6873SLukas Czerner goto out; 3187bfff6873SLukas Czerner } 3188bfff6873SLukas Czerner out: 3189bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3190beed5ecbSNicolas Kaiser if (ret) 3191bfff6873SLukas Czerner kfree(elr); 3192bfff6873SLukas Czerner return ret; 3193bfff6873SLukas Czerner } 3194bfff6873SLukas Czerner 3195bfff6873SLukas Czerner /* 3196bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3197bfff6873SLukas Czerner * module unload. 3198bfff6873SLukas Czerner */ 3199bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3200bfff6873SLukas Czerner { 3201bfff6873SLukas Czerner /* 3202bfff6873SLukas Czerner * If thread exited earlier 3203bfff6873SLukas Czerner * there's nothing to be done. 3204bfff6873SLukas Czerner */ 32058f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3206bfff6873SLukas Czerner return; 3207bfff6873SLukas Czerner 32088f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3209bfff6873SLukas Czerner } 3210bfff6873SLukas Czerner 321125ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 321225ed6e8aSDarrick J. Wong { 321325ed6e8aSDarrick J. Wong int ret = 1; 321425ed6e8aSDarrick J. Wong int compat, incompat; 321525ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 321625ed6e8aSDarrick J. Wong 32179aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) { 3218db9ee220SDarrick J. Wong /* journal checksum v3 */ 321925ed6e8aSDarrick J. Wong compat = 0; 3220db9ee220SDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V3; 322125ed6e8aSDarrick J. Wong } else { 322225ed6e8aSDarrick J. Wong /* journal checksum v1 */ 322325ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 322425ed6e8aSDarrick J. Wong incompat = 0; 322525ed6e8aSDarrick J. Wong } 322625ed6e8aSDarrick J. Wong 3227feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 3228feb8c6d3SDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3229feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V3 | 3230feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 323125ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 323225ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 323325ed6e8aSDarrick J. Wong compat, 0, 323425ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 323525ed6e8aSDarrick J. Wong incompat); 323625ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 323725ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 323825ed6e8aSDarrick J. Wong compat, 0, 323925ed6e8aSDarrick J. Wong incompat); 324025ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 324125ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 324225ed6e8aSDarrick J. Wong } else { 3243feb8c6d3SDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3244feb8c6d3SDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 324525ed6e8aSDarrick J. Wong } 324625ed6e8aSDarrick J. Wong 324725ed6e8aSDarrick J. Wong return ret; 324825ed6e8aSDarrick J. Wong } 324925ed6e8aSDarrick J. Wong 3250952fc18eSTheodore Ts'o /* 3251952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3252952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3253952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3254952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3255952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3256952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3257952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3258952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3259952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3260952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3261952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3262952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3263952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3264952fc18eSTheodore Ts'o */ 3265952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3266952fc18eSTheodore Ts'o char *buf) 3267952fc18eSTheodore Ts'o { 3268952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3269952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3270952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3271952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3272952fc18eSTheodore Ts'o int s, j, count = 0; 3273952fc18eSTheodore Ts'o 32740548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32750548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32760548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32770548bbb8STheodore Ts'o 3278952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3279952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3280952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3281952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3282952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3283952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3284952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3285952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3286952fc18eSTheodore Ts'o count++; 3287952fc18eSTheodore Ts'o } 3288952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3289952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3290952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3291952fc18eSTheodore Ts'o count++; 3292952fc18eSTheodore Ts'o } 3293952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3294952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3295952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3296952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3297952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3298952fc18eSTheodore Ts'o count++; 3299952fc18eSTheodore Ts'o } 3300952fc18eSTheodore Ts'o if (i != grp) 3301952fc18eSTheodore Ts'o continue; 3302952fc18eSTheodore Ts'o s = 0; 3303952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3304952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3305952fc18eSTheodore Ts'o count++; 3306952fc18eSTheodore Ts'o } 3307952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3308952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3309952fc18eSTheodore Ts'o count++; 3310952fc18eSTheodore Ts'o } 3311952fc18eSTheodore Ts'o } 3312952fc18eSTheodore Ts'o if (!count) 3313952fc18eSTheodore Ts'o return 0; 3314952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3315952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3316952fc18eSTheodore Ts'o } 3317952fc18eSTheodore Ts'o 3318952fc18eSTheodore Ts'o /* 3319952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3320952fc18eSTheodore Ts'o */ 3321952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3322952fc18eSTheodore Ts'o { 3323952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3324952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3325952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3326952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 33274fdb5543SDmitry Monakhov char *buf = (char *) get_zeroed_page(GFP_NOFS); 3328952fc18eSTheodore Ts'o 3329952fc18eSTheodore Ts'o if (!buf) 3330952fc18eSTheodore Ts'o return -ENOMEM; 3331952fc18eSTheodore Ts'o 3332952fc18eSTheodore Ts'o /* 3333952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3334952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3335952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3336952fc18eSTheodore Ts'o */ 3337952fc18eSTheodore Ts'o 3338952fc18eSTheodore Ts'o /* 3339952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3340952fc18eSTheodore Ts'o */ 3341952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3342952fc18eSTheodore Ts'o 3343952fc18eSTheodore Ts'o /* 3344952fc18eSTheodore Ts'o * Add the overhead found in each block group 3345952fc18eSTheodore Ts'o */ 3346952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3347952fc18eSTheodore Ts'o int blks; 3348952fc18eSTheodore Ts'o 3349952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3350952fc18eSTheodore Ts'o overhead += blks; 3351952fc18eSTheodore Ts'o if (blks) 3352952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3353952fc18eSTheodore Ts'o cond_resched(); 3354952fc18eSTheodore Ts'o } 3355b003b524SEric Sandeen /* Add the internal journal blocks as well */ 3356b003b524SEric Sandeen if (sbi->s_journal && !sbi->journal_bdev) 3357810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33580875a2b4SEric Sandeen 3359952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3360952fc18eSTheodore Ts'o smp_wmb(); 3361952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3362952fc18eSTheodore Ts'o return 0; 3363952fc18eSTheodore Ts'o } 3364952fc18eSTheodore Ts'o 336527dd4385SLukas Czerner 336630fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 336727dd4385SLukas Czerner { 336827dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 336927dd4385SLukas Czerner 337027dd4385SLukas Czerner /* 337130fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 337230fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 337330fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 337430fac0f7SJan Kara * to keep ext2/3 backward compatibility. 337530fac0f7SJan Kara */ 337630fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 337730fac0f7SJan Kara return 0; 337830fac0f7SJan Kara /* 337927dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 338027dd4385SLukas Czerner * This should cover the situations where we can not afford to run 338127dd4385SLukas Czerner * out of space like for example punch hole, or converting 3382556615dcSLukas Czerner * unwritten extents in delalloc path. In most cases such 338327dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 338427dd4385SLukas Czerner * very rare. 338527dd4385SLukas Czerner */ 338630fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 338730fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 338827dd4385SLukas Czerner 338927dd4385SLukas Czerner do_div(resv_clusters, 50); 339027dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 339127dd4385SLukas Czerner 339227dd4385SLukas Czerner return resv_clusters; 339327dd4385SLukas Czerner } 339427dd4385SLukas Czerner 339527dd4385SLukas Czerner 339627dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 339727dd4385SLukas Czerner { 339827dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 339927dd4385SLukas Czerner sbi->s_cluster_bits; 340027dd4385SLukas Czerner 340127dd4385SLukas Czerner if (count >= clusters) 340227dd4385SLukas Czerner return -EINVAL; 340327dd4385SLukas Czerner 340427dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 340527dd4385SLukas Czerner return 0; 340627dd4385SLukas Czerner } 340727dd4385SLukas Czerner 3408617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3409ac27a0ecSDave Kleikamp { 3410d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3411ac27a0ecSDave Kleikamp struct buffer_head *bh; 3412617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3413617ba13bSMingming Cao struct ext4_sb_info *sbi; 3414617ba13bSMingming Cao ext4_fsblk_t block; 3415617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 341670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3417ac27a0ecSDave Kleikamp unsigned long offset = 0; 3418ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3419ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3420ac27a0ecSDave Kleikamp struct inode *root; 34219f6200bbSTheodore Ts'o char *cp; 34220390131bSFrank Mayhar const char *descr; 3423dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3424281b5995STheodore Ts'o int blocksize, clustersize; 34254ec11028STheodore Ts'o unsigned int db_count; 34264ec11028STheodore Ts'o unsigned int i; 3427281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3428bd81d8eeSLaurent Vivier __u64 blocks_count; 342907aa2ea1SLukas Czerner int err = 0; 3430b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3431bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3432ac27a0ecSDave Kleikamp 3433ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3434ac27a0ecSDave Kleikamp if (!sbi) 3435dcc7dae3SCyrill Gorcunov goto out_free_orig; 3436705895b6SPekka Enberg 3437705895b6SPekka Enberg sbi->s_blockgroup_lock = 3438705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3439705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3440705895b6SPekka Enberg kfree(sbi); 3441dcc7dae3SCyrill Gorcunov goto out_free_orig; 3442705895b6SPekka Enberg } 3443ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 34442c0544b2STheodore Ts'o sbi->s_sb = sb; 3445240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3446d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3447f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3448f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3449f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3450b30ab0e0SMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 3451b30ab0e0SMichael Halcrow /* Modes of operations for file and directory encryption. */ 3452b30ab0e0SMichael Halcrow sbi->s_file_encryption_mode = EXT4_ENCRYPTION_MODE_AES_256_XTS; 3453b30ab0e0SMichael Halcrow sbi->s_dir_encryption_mode = EXT4_ENCRYPTION_MODE_INVALID; 3454b30ab0e0SMichael Halcrow #endif 3455ac27a0ecSDave Kleikamp 34569f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34579f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34589f6200bbSTheodore Ts'o *cp = '!'; 34599f6200bbSTheodore Ts'o 346007aa2ea1SLukas Czerner /* -EINVAL is default */ 3461dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3462617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3463ac27a0ecSDave Kleikamp if (!blocksize) { 3464b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3465ac27a0ecSDave Kleikamp goto out_fail; 3466ac27a0ecSDave Kleikamp } 3467ac27a0ecSDave Kleikamp 3468ac27a0ecSDave Kleikamp /* 3469617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3470ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3471ac27a0ecSDave Kleikamp */ 3472617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 347370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 347470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3475ac27a0ecSDave Kleikamp } else { 347670bbb3e0SAndrew Morton logical_sb_block = sb_block; 3477ac27a0ecSDave Kleikamp } 3478ac27a0ecSDave Kleikamp 3479a8ac900bSGioh Kim if (!(bh = sb_bread_unmovable(sb, logical_sb_block))) { 3480b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3481ac27a0ecSDave Kleikamp goto out_fail; 3482ac27a0ecSDave Kleikamp } 3483ac27a0ecSDave Kleikamp /* 3484ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3485617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3486ac27a0ecSDave Kleikamp */ 34872716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3488ac27a0ecSDave Kleikamp sbi->s_es = es; 3489ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3490617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3491617ba13bSMingming Cao goto cantfind_ext4; 3492afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3493ac27a0ecSDave Kleikamp 3494feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3495feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3496feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3497feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3498363307e6SJakub Wilk ext4_warning(sb, "metadata_csum and uninit_bg are " 3499feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3500feb0ab32SDarrick J. Wong 3501d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3502d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3503d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3504d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3505d25425f8SDarrick J. Wong silent = 1; 3506d25425f8SDarrick J. Wong goto cantfind_ext4; 3507d25425f8SDarrick J. Wong } 3508d25425f8SDarrick J. Wong 35090441984aSDarrick J. Wong /* Load the checksum driver */ 35100441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 35110441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 35120441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 35130441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 35140441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 35150441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 35160441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 35170441984aSDarrick J. Wong goto failed_mount; 35180441984aSDarrick J. Wong } 35190441984aSDarrick J. Wong } 35200441984aSDarrick J. Wong 3521a9c47317SDarrick J. Wong /* Check superblock checksum */ 3522a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3523a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3524a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3525a9c47317SDarrick J. Wong silent = 1; 3526a9c47317SDarrick J. Wong goto cantfind_ext4; 3527a9c47317SDarrick J. Wong } 3528a9c47317SDarrick J. Wong 3529a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 35309aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(sb)) 3531a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3532a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3533a9c47317SDarrick J. Wong 3534ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3535ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3536fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3537617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3538fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 353987f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3540fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3541617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3542fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3543ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3544fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 354503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3546fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 35472e7842b8SHugh Dickins #endif 354898c1a759SDarrick J. Wong /* don't forget to enable journal_csum when metadata_csum is enabled. */ 354998c1a759SDarrick J. Wong if (ext4_has_metadata_csum(sb)) 355098c1a759SDarrick J. Wong set_opt(sb, JOURNAL_CHECKSUM); 355198c1a759SDarrick J. Wong 3552617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3553fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3554617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3555fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3556617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3557fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3558ac27a0ecSDave Kleikamp 3559617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3560fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3561bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3562fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3563bb4f397aSAneesh Kumar K.V else 3564fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 356545f1a9c3SDarrick J. Wong /* block_validity enabled by default; disable with noblock_validity */ 3566fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35678b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3568fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3569ac27a0ecSDave Kleikamp 357008cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 357108cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 357230773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 357330773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 357430773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3575ac27a0ecSDave Kleikamp 35768b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3577fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3578ac27a0ecSDave Kleikamp 35791e2462f9SMingming Cao /* 3580dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3581dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3582dd919b98SAneesh Kumar K.V */ 3583bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35848b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3585fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3586dd919b98SAneesh Kumar K.V 358751ce6511SLukas Czerner /* 358851ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 358951ce6511SLukas Czerner * no mount option specified. 359051ce6511SLukas Czerner */ 359151ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 359251ce6511SLukas Czerner 35938b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3594661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35958b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35968b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35978b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35988b67f04aSTheodore Ts'o } 35995a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3600b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3601661aa520SEric Sandeen &journal_ioprio, 0)) 3602ac27a0ecSDave Kleikamp goto failed_mount; 3603ac27a0ecSDave Kleikamp 360456889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 360556889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 360656889787STheodore Ts'o "with data=journal disables delayed " 360756889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 360856889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 360956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 361056889787STheodore Ts'o "both data=journal and delalloc"); 361156889787STheodore Ts'o goto failed_mount; 361256889787STheodore Ts'o } 361356889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 361456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 36156ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 361656889787STheodore Ts'o goto failed_mount; 361756889787STheodore Ts'o } 3618923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 3619923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 3620923ae0ffSRoss Zwisler "both data=journal and dax"); 3621923ae0ffSRoss Zwisler goto failed_mount; 3622923ae0ffSRoss Zwisler } 362356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 362456889787STheodore Ts'o clear_opt(sb, DELALLOC); 362556889787STheodore Ts'o } 362656889787STheodore Ts'o 3627ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3628482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3629ac27a0ecSDave Kleikamp 3630617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3631617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3632617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3633617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3634b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3635b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3636b31e1552SEric Sandeen "running e2fsck is recommended"); 3637469108ffSTheodore Tso 3638ed3654ebSTheodore Ts'o if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) { 3639ed3654ebSTheodore Ts'o set_opt2(sb, HURD_COMPAT); 3640ed3654ebSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, 3641ed3654ebSTheodore Ts'o EXT4_FEATURE_INCOMPAT_64BIT)) { 3642ed3654ebSTheodore Ts'o ext4_msg(sb, KERN_ERR, 3643ed3654ebSTheodore Ts'o "The Hurd can't support 64-bit file systems"); 3644ed3654ebSTheodore Ts'o goto failed_mount; 3645ed3654ebSTheodore Ts'o } 3646ed3654ebSTheodore Ts'o } 3647ed3654ebSTheodore Ts'o 36482035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 36492035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 36502035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 36512035e776STheodore Ts'o "using the ext4 subsystem"); 36522035e776STheodore Ts'o else { 36532035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 36542035e776STheodore Ts'o "to feature incompatibilities"); 36552035e776STheodore Ts'o goto failed_mount; 36562035e776STheodore Ts'o } 36572035e776STheodore Ts'o } 36582035e776STheodore Ts'o 36592035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 36602035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 36612035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 36622035e776STheodore Ts'o "using the ext4 subsystem"); 36632035e776STheodore Ts'o else { 36642035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 36652035e776STheodore Ts'o "to feature incompatibilities"); 36662035e776STheodore Ts'o goto failed_mount; 36672035e776STheodore Ts'o } 36682035e776STheodore Ts'o } 36692035e776STheodore Ts'o 3670469108ffSTheodore Tso /* 3671ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3672ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3673ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3674ac27a0ecSDave Kleikamp */ 3675a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3676ac27a0ecSDave Kleikamp goto failed_mount; 3677a13fb1a4SEric Sandeen 3678261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3679617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3680617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3681b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3682b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3683ac27a0ecSDave Kleikamp goto failed_mount; 3684ac27a0ecSDave Kleikamp } 3685ac27a0ecSDave Kleikamp 3686923ae0ffSRoss Zwisler if (sbi->s_mount_opt & EXT4_MOUNT_DAX) { 3687923ae0ffSRoss Zwisler if (blocksize != PAGE_SIZE) { 3688923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3689923ae0ffSRoss Zwisler "error: unsupported blocksize for dax"); 3690923ae0ffSRoss Zwisler goto failed_mount; 3691923ae0ffSRoss Zwisler } 3692923ae0ffSRoss Zwisler if (!sb->s_bdev->bd_disk->fops->direct_access) { 3693923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, 3694923ae0ffSRoss Zwisler "error: device does not support dax"); 3695923ae0ffSRoss Zwisler goto failed_mount; 3696923ae0ffSRoss Zwisler } 3697923ae0ffSRoss Zwisler } 3698923ae0ffSRoss Zwisler 3699*6ddb2447STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT) && 3700*6ddb2447STheodore Ts'o es->s_encryption_level) { 3701*6ddb2447STheodore Ts'o ext4_msg(sb, KERN_ERR, "Unsupported encryption level %d", 3702*6ddb2447STheodore Ts'o es->s_encryption_level); 3703*6ddb2447STheodore Ts'o goto failed_mount; 3704*6ddb2447STheodore Ts'o } 3705*6ddb2447STheodore Ts'o 3706ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3707ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3708ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3709b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3710ce40733cSAneesh Kumar K.V blocksize); 3711ac27a0ecSDave Kleikamp goto failed_mount; 3712ac27a0ecSDave Kleikamp } 3713ac27a0ecSDave Kleikamp 3714ac27a0ecSDave Kleikamp brelse(bh); 371570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 371670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3717a8ac900bSGioh Kim bh = sb_bread_unmovable(sb, logical_sb_block); 3718ac27a0ecSDave Kleikamp if (!bh) { 3719b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3720b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3721ac27a0ecSDave Kleikamp goto failed_mount; 3722ac27a0ecSDave Kleikamp } 37232716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3724ac27a0ecSDave Kleikamp sbi->s_es = es; 3725617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3726b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3727b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3728ac27a0ecSDave Kleikamp goto failed_mount; 3729ac27a0ecSDave Kleikamp } 3730ac27a0ecSDave Kleikamp } 3731ac27a0ecSDave Kleikamp 3732a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3733a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3734f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3735f287a1a5STheodore Ts'o has_huge_files); 3736f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3737ac27a0ecSDave Kleikamp 3738617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3739617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3740617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3741ac27a0ecSDave Kleikamp } else { 3742ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3743ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3744617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 37451330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3746ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3747b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3748b31e1552SEric Sandeen "unsupported inode size: %d", 3749ac27a0ecSDave Kleikamp sbi->s_inode_size); 3750ac27a0ecSDave Kleikamp goto failed_mount; 3751ac27a0ecSDave Kleikamp } 3752ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3753ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3754ac27a0ecSDave Kleikamp } 37550b8e58a1SAndreas Dilger 37560d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 37570d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 37588fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 37590d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3760d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3761b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3762b31e1552SEric Sandeen "unsupported descriptor size %lu", 37630d1ee42fSAlexandre Ratchov sbi->s_desc_size); 37640d1ee42fSAlexandre Ratchov goto failed_mount; 37650d1ee42fSAlexandre Ratchov } 37660d1ee42fSAlexandre Ratchov } else 37670d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 37680b8e58a1SAndreas Dilger 3769ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3770ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3771b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3772617ba13bSMingming Cao goto cantfind_ext4; 37730b8e58a1SAndreas Dilger 3774617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3775ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3776617ba13bSMingming Cao goto cantfind_ext4; 3777ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3778ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 37790d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3780ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3781ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3782e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3783e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 37840b8e58a1SAndreas Dilger 3785ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3786ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3787ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 378823301410STheodore Ts'o if (EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_DIR_INDEX)) { 3789f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3790f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3791f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3792f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3793f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 379423301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 379523301410STheodore Ts'o es->s_flags |= 379623301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3797f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3798f99b2589STheodore Ts'o #else 379923301410STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 380023301410STheodore Ts'o es->s_flags |= 380123301410STheodore Ts'o cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3802f99b2589STheodore Ts'o #endif 3803f99b2589STheodore Ts'o } 380423301410STheodore Ts'o } 3805ac27a0ecSDave Kleikamp 3806281b5995STheodore Ts'o /* Handle clustersize */ 3807281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3808281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3809281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3810281b5995STheodore Ts'o if (has_bigalloc) { 3811281b5995STheodore Ts'o if (clustersize < blocksize) { 3812281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3813281b5995STheodore Ts'o "cluster size (%d) smaller than " 3814281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3815281b5995STheodore Ts'o goto failed_mount; 3816281b5995STheodore Ts'o } 3817281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3818281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3819281b5995STheodore Ts'o sbi->s_clusters_per_group = 3820281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3821281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3822281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3823281b5995STheodore Ts'o "#clusters per group too big: %lu", 3824281b5995STheodore Ts'o sbi->s_clusters_per_group); 3825281b5995STheodore Ts'o goto failed_mount; 3826281b5995STheodore Ts'o } 3827281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3828281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3829281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3830281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3831281b5995STheodore Ts'o sbi->s_blocks_per_group, 3832281b5995STheodore Ts'o sbi->s_clusters_per_group); 3833281b5995STheodore Ts'o goto failed_mount; 3834281b5995STheodore Ts'o } 3835281b5995STheodore Ts'o } else { 3836281b5995STheodore Ts'o if (clustersize != blocksize) { 3837281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3838281b5995STheodore Ts'o "block size (%d)", clustersize, 3839281b5995STheodore Ts'o blocksize); 3840281b5995STheodore Ts'o clustersize = blocksize; 3841281b5995STheodore Ts'o } 3842ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3843b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3844b31e1552SEric Sandeen "#blocks per group too big: %lu", 3845ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3846ac27a0ecSDave Kleikamp goto failed_mount; 3847ac27a0ecSDave Kleikamp } 3848281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3849281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3850281b5995STheodore Ts'o } 3851281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3852281b5995STheodore Ts'o 3853ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3854b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3855b31e1552SEric Sandeen "#inodes per group too big: %lu", 3856ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3857ac27a0ecSDave Kleikamp goto failed_mount; 3858ac27a0ecSDave Kleikamp } 3859ac27a0ecSDave Kleikamp 3860960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3861960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3862960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3863960fd856STheodore Ts'o 3864bf43d84bSEric Sandeen /* 3865bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3866bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3867bf43d84bSEric Sandeen */ 38685a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 386930ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 38705a9ae68aSDarrick J. Wong if (err) { 3871b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3872bf43d84bSEric Sandeen " too large to mount safely on this system"); 3873ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 387490c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3875ac27a0ecSDave Kleikamp goto failed_mount; 3876ac27a0ecSDave Kleikamp } 3877ac27a0ecSDave Kleikamp 3878617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3879617ba13bSMingming Cao goto cantfind_ext4; 3880e7c95593SEric Sandeen 38810f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 38820f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 38830f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3884b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3885b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 38860f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 38870f2ddca6SFrom: Thiemo Nagel goto failed_mount; 38880f2ddca6SFrom: Thiemo Nagel } 38890f2ddca6SFrom: Thiemo Nagel 38904ec11028STheodore Ts'o /* 38914ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 38924ec11028STheodore Ts'o * of the filesystem. 38934ec11028STheodore Ts'o */ 38944ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3895b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3896b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3897e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38984ec11028STheodore Ts'o ext4_blocks_count(es)); 3899e7c95593SEric Sandeen goto failed_mount; 3900e7c95593SEric Sandeen } 3901bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3902bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3903bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3904bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 39054ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3906b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 39074ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3908b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 39094ec11028STheodore Ts'o ext4_blocks_count(es), 39104ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 39114ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 39124ec11028STheodore Ts'o goto failed_mount; 39134ec11028STheodore Ts'o } 3914bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3915fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3916fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3917617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3918617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3919f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3920f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3921ac27a0ecSDave Kleikamp GFP_KERNEL); 3922ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3923b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 39242cde417dSTheodore Ts'o ret = -ENOMEM; 3925ac27a0ecSDave Kleikamp goto failed_mount; 3926ac27a0ecSDave Kleikamp } 3927ac27a0ecSDave Kleikamp 39289f6200bbSTheodore Ts'o if (ext4_proc_root) 39299f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3930240799cdSTheodore Ts'o 393166acdcf4STheodore Ts'o if (sbi->s_proc) 393266acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 393366acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 393466acdcf4STheodore Ts'o 3935705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3936ac27a0ecSDave Kleikamp 3937ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 393870bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3939a8ac900bSGioh Kim sbi->s_group_desc[i] = sb_bread_unmovable(sb, block); 3940ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3941b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3942b31e1552SEric Sandeen "can't read group descriptor %d", i); 3943ac27a0ecSDave Kleikamp db_count = i; 3944ac27a0ecSDave Kleikamp goto failed_mount2; 3945ac27a0ecSDave Kleikamp } 3946ac27a0ecSDave Kleikamp } 3947bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3948b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3949f9ae9cf5STheodore Ts'o goto failed_mount2; 3950ac27a0ecSDave Kleikamp } 3951772cb7c8SJose R. Santos 3952f9ae9cf5STheodore Ts'o sbi->s_gdb_count = db_count; 3953ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3954ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3955ac27a0ecSDave Kleikamp 395604ecddb7SJan Mrazek setup_timer(&sbi->s_err_report, print_daily_error_info, 395704ecddb7SJan Mrazek (unsigned long) sb); 395804496411STao Ma 3959a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3960eb68d0e2SZheng Liu if (ext4_es_register_shrinker(sbi)) 3961ce7e010aSTheodore Ts'o goto failed_mount3; 3962ce7e010aSTheodore Ts'o 3963c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 396467a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3965c9de560dSAlex Tomas 3966f9ae9cf5STheodore Ts'o /* 3967f9ae9cf5STheodore Ts'o * set up enough so that it can read an inode 3968f9ae9cf5STheodore Ts'o */ 3969f9ae9cf5STheodore Ts'o sb->s_op = &ext4_sops; 3970617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3971617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3972ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3973617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3974262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39751fa5efe3SJan Kara sb->s_qcop = &dquot_quotactl_sysfile_ops; 3976262b4662SJan Kara else 3977262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 397896c7e0d9SJan Kara sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; 3979ac27a0ecSDave Kleikamp #endif 3980f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3981f2fa2ffcSAneesh Kumar K.V 3982ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39833b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3984ac27a0ecSDave Kleikamp 3985ac27a0ecSDave Kleikamp sb->s_root = NULL; 3986ac27a0ecSDave Kleikamp 3987ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3988617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3989617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3990ac27a0ecSDave Kleikamp 3991c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3992c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3993c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 399450460fe8SDarrick J. Wong goto failed_mount3a; 3995c5e06d10SJohann Lombardi 3996ac27a0ecSDave Kleikamp /* 3997ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3998ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3999ac27a0ecSDave Kleikamp */ 4000ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 4001617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 4002617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 400350460fe8SDarrick J. Wong goto failed_mount3a; 40040390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 40050390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4006b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 4007b31e1552SEric Sandeen "suppressed and not mounted read-only"); 4008744692dcSJiaying Zhang goto failed_mount_wq; 4009ac27a0ecSDave Kleikamp } else { 4010fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 40110390131bSFrank Mayhar sbi->s_journal = NULL; 40120390131bSFrank Mayhar needs_recovery = 0; 40130390131bSFrank Mayhar goto no_journal; 4014ac27a0ecSDave Kleikamp } 4015ac27a0ecSDave Kleikamp 4016f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 4017eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 4018eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 4019b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 4020744692dcSJiaying Zhang goto failed_mount_wq; 4021eb40a09cSJose R. Santos } 4022eb40a09cSJose R. Santos 402325ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 402425ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 402525ed6e8aSDarrick J. Wong "feature set"); 402625ed6e8aSDarrick J. Wong goto failed_mount_wq; 4027d4da6c9cSLinus Torvalds } 4028818d276cSGirish Shilamkar 4029ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 4030ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 4031ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 4032ac27a0ecSDave Kleikamp case 0: 4033ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 403463f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 403563f57933SAndrew Morton * cope, else JOURNAL_DATA 403663f57933SAndrew Morton */ 4037dab291afSMingming Cao if (jbd2_journal_check_available_features 4038dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 4039fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 4040ac27a0ecSDave Kleikamp else 4041fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 4042ac27a0ecSDave Kleikamp break; 4043ac27a0ecSDave Kleikamp 4044617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 4045617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 4046dab291afSMingming Cao if (!jbd2_journal_check_available_features 4047dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 4048b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 4049b31e1552SEric Sandeen "requested data journaling mode"); 4050744692dcSJiaying Zhang goto failed_mount_wq; 4051ac27a0ecSDave Kleikamp } 4052ac27a0ecSDave Kleikamp default: 4053ac27a0ecSDave Kleikamp break; 4054ac27a0ecSDave Kleikamp } 4055b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4056ac27a0ecSDave Kleikamp 405718aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 405818aadd47SBobi Jam 4059ce7e010aSTheodore Ts'o no_journal: 40609c191f70ST Makphaibulchoke if (ext4_mballoc_ready) { 40619c191f70ST Makphaibulchoke sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id); 40629c191f70ST Makphaibulchoke if (!sbi->s_mb_cache) { 40639c191f70ST Makphaibulchoke ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache"); 40649c191f70ST Makphaibulchoke goto failed_mount_wq; 40659c191f70ST Makphaibulchoke } 40669c191f70ST Makphaibulchoke } 40679c191f70ST Makphaibulchoke 4068*6ddb2447STheodore Ts'o if (unlikely(sbi->s_mount_flags & EXT4_MF_TEST_DUMMY_ENCRYPTION) && 4069*6ddb2447STheodore Ts'o !(sb->s_flags & MS_RDONLY) && 4070*6ddb2447STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT)) { 4071*6ddb2447STheodore Ts'o EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_ENCRYPT); 4072*6ddb2447STheodore Ts'o ext4_commit_super(sb, 1); 4073*6ddb2447STheodore Ts'o } 4074*6ddb2447STheodore Ts'o 4075fd89d5f2STejun Heo /* 4076952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4077952fc18eSTheodore Ts'o * superblock if present. 4078952fc18eSTheodore Ts'o */ 4079952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4080952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4081952fc18eSTheodore Ts'o else { 408207aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 408307aa2ea1SLukas Czerner if (err) 4084952fc18eSTheodore Ts'o goto failed_mount_wq; 4085952fc18eSTheodore Ts'o } 4086952fc18eSTheodore Ts'o 4087952fc18eSTheodore Ts'o /* 4088fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4089fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4090fd89d5f2STejun Heo */ 40912e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40922e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40932e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40942e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 409507aa2ea1SLukas Czerner ret = -ENOMEM; 40962e8fa54eSJan Kara goto failed_mount4; 40972e8fa54eSJan Kara } 40982e8fa54eSJan Kara 4099ac27a0ecSDave Kleikamp /* 4100dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4101ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4102ac27a0ecSDave Kleikamp */ 4103ac27a0ecSDave Kleikamp 41041d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 41051d1fe1eeSDavid Howells if (IS_ERR(root)) { 4106b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 41071d1fe1eeSDavid Howells ret = PTR_ERR(root); 410832a9bb57SManish Katiyar root = NULL; 4109ac27a0ecSDave Kleikamp goto failed_mount4; 4110ac27a0ecSDave Kleikamp } 4111ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4112b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 411394bf608aSAl Viro iput(root); 4114ac27a0ecSDave Kleikamp goto failed_mount4; 4115ac27a0ecSDave Kleikamp } 411648fde701SAl Viro sb->s_root = d_make_root(root); 41171d1fe1eeSDavid Howells if (!sb->s_root) { 4118b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 41191d1fe1eeSDavid Howells ret = -ENOMEM; 41201d1fe1eeSDavid Howells goto failed_mount4; 41211d1fe1eeSDavid Howells } 4122ac27a0ecSDave Kleikamp 41237e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 41247e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4125ef7f3835SKalpak Shah 4126ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4127ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4128ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4129ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4130ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4131ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4132ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4133ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4134ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4135ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4136ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4137ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4138ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4139ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4140ef7f3835SKalpak Shah } 4141ef7f3835SKalpak Shah } 4142ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4143ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4144ef7f3835SKalpak Shah sbi->s_inode_size) { 4145ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4146ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4147b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4148b31e1552SEric Sandeen "available"); 4149ef7f3835SKalpak Shah } 4150ef7f3835SKalpak Shah 415130fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 415227dd4385SLukas Czerner if (err) { 415327dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 415430fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 4155f9ae9cf5STheodore Ts'o goto failed_mount4a; 415627dd4385SLukas Czerner } 415727dd4385SLukas Czerner 41586fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 41596fd058f7STheodore Ts'o if (err) { 4160b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4161fbe845ddSCurt Wohlgemuth "zone (%d)", err); 4162f9ae9cf5STheodore Ts'o goto failed_mount4a; 4163f9ae9cf5STheodore Ts'o } 4164f9ae9cf5STheodore Ts'o 4165f9ae9cf5STheodore Ts'o ext4_ext_init(sb); 4166f9ae9cf5STheodore Ts'o err = ext4_mb_init(sb); 4167f9ae9cf5STheodore Ts'o if (err) { 4168f9ae9cf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4169f9ae9cf5STheodore Ts'o err); 4170dcf2d804STao Ma goto failed_mount5; 4171c2774d84SAneesh Kumar K.V } 4172c2774d84SAneesh Kumar K.V 4173d5e03cbbSTheodore Ts'o block = ext4_count_free_clusters(sb); 4174d5e03cbbSTheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 4175d5e03cbbSTheodore Ts'o EXT4_C2B(sbi, block)); 4176908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeclusters_counter, block, 4177908c7f19STejun Heo GFP_KERNEL); 4178d5e03cbbSTheodore Ts'o if (!err) { 4179d5e03cbbSTheodore Ts'o unsigned long freei = ext4_count_free_inodes(sb); 4180d5e03cbbSTheodore Ts'o sbi->s_es->s_free_inodes_count = cpu_to_le32(freei); 4181908c7f19STejun Heo err = percpu_counter_init(&sbi->s_freeinodes_counter, freei, 4182908c7f19STejun Heo GFP_KERNEL); 4183d5e03cbbSTheodore Ts'o } 4184d5e03cbbSTheodore Ts'o if (!err) 4185d5e03cbbSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 4186908c7f19STejun Heo ext4_count_dirs(sb), GFP_KERNEL); 4187d5e03cbbSTheodore Ts'o if (!err) 4188908c7f19STejun Heo err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0, 4189908c7f19STejun Heo GFP_KERNEL); 4190d5e03cbbSTheodore Ts'o if (err) { 4191d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 4192d5e03cbbSTheodore Ts'o goto failed_mount6; 4193d5e03cbbSTheodore Ts'o } 4194d5e03cbbSTheodore Ts'o 4195d5e03cbbSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 4196d5e03cbbSTheodore Ts'o if (!ext4_fill_flex_info(sb)) { 4197d5e03cbbSTheodore Ts'o ext4_msg(sb, KERN_ERR, 4198d5e03cbbSTheodore Ts'o "unable to initialize " 4199d5e03cbbSTheodore Ts'o "flex_bg meta info!"); 4200d5e03cbbSTheodore Ts'o goto failed_mount6; 4201d5e03cbbSTheodore Ts'o } 4202d5e03cbbSTheodore Ts'o 4203bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4204bfff6873SLukas Czerner if (err) 4205dcf2d804STao Ma goto failed_mount6; 4206bfff6873SLukas Czerner 42073197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 42083197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 42093197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 42103197ebdbSTheodore Ts'o "%s", sb->s_id); 4211dcf2d804STao Ma if (err) 4212dcf2d804STao Ma goto failed_mount7; 42133197ebdbSTheodore Ts'o 42149b2ff357SJan Kara #ifdef CONFIG_QUOTA 42159b2ff357SJan Kara /* Enable quota usage during mount. */ 42169b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 42179b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 42189b2ff357SJan Kara err = ext4_enable_quotas(sb); 42199b2ff357SJan Kara if (err) 42209b2ff357SJan Kara goto failed_mount8; 42219b2ff357SJan Kara } 42229b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 42239b2ff357SJan Kara 4224617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4225617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4226617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 42270390131bSFrank Mayhar if (needs_recovery) { 4228b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4229617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 42300390131bSFrank Mayhar } 42310390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 42320390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 42330390131bSFrank Mayhar descr = " journalled data mode"; 42340390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 42350390131bSFrank Mayhar descr = " ordered data mode"; 42360390131bSFrank Mayhar else 42370390131bSFrank Mayhar descr = " writeback data mode"; 42380390131bSFrank Mayhar } else 42390390131bSFrank Mayhar descr = "out journal"; 42400390131bSFrank Mayhar 424179add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 424279add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 424379add3a3SLukas Czerner if (!blk_queue_discard(q)) 424479add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 424579add3a3SLukas Czerner "mounting with \"discard\" option, but " 424679add3a3SLukas Czerner "the device does not support discard"); 424779add3a3SLukas Czerner } 424879add3a3SLukas Czerner 4249d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 42508b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, 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: 427172ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 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: 42940390131bSFrank Mayhar if (sbi->s_journal) { 4295dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 429647b4a50bSJan Kara sbi->s_journal = NULL; 42970390131bSFrank Mayhar } 429850460fe8SDarrick J. Wong failed_mount3a: 4299d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 4300eb68d0e2SZheng Liu failed_mount3: 43019105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 4302c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4303c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4304ac27a0ecSDave Kleikamp failed_mount2: 4305ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4306ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4307b93b41d4SAl Viro kvfree(sbi->s_group_desc); 4308ac27a0ecSDave Kleikamp failed_mount: 43090441984aSDarrick J. Wong if (sbi->s_chksum_driver) 43100441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4311240799cdSTheodore Ts'o if (sbi->s_proc) { 431266acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 43139f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4314240799cdSTheodore Ts'o } 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); 4324ac27a0ecSDave Kleikamp kfree(sbi); 4325dcc7dae3SCyrill Gorcunov out_free_orig: 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 4355617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4356ac27a0ecSDave Kleikamp unsigned int journal_inum) 4357ac27a0ecSDave Kleikamp { 4358ac27a0ecSDave Kleikamp struct inode *journal_inode; 4359ac27a0ecSDave Kleikamp journal_t *journal; 4360ac27a0ecSDave Kleikamp 43610390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43620390131bSFrank Mayhar 4363ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4364ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4365ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4366ac27a0ecSDave Kleikamp 43671d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 43681d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4369b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4370ac27a0ecSDave Kleikamp return NULL; 4371ac27a0ecSDave Kleikamp } 4372ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4373ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4374ac27a0ecSDave Kleikamp iput(journal_inode); 4375b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4376ac27a0ecSDave Kleikamp return NULL; 4377ac27a0ecSDave Kleikamp } 4378ac27a0ecSDave Kleikamp 4379e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4380ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 43811d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4382b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4383ac27a0ecSDave Kleikamp iput(journal_inode); 4384ac27a0ecSDave Kleikamp return NULL; 4385ac27a0ecSDave Kleikamp } 4386ac27a0ecSDave Kleikamp 4387dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4388ac27a0ecSDave Kleikamp if (!journal) { 4389b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4390ac27a0ecSDave Kleikamp iput(journal_inode); 4391ac27a0ecSDave Kleikamp return NULL; 4392ac27a0ecSDave Kleikamp } 4393ac27a0ecSDave Kleikamp journal->j_private = sb; 4394617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4395ac27a0ecSDave Kleikamp return journal; 4396ac27a0ecSDave Kleikamp } 4397ac27a0ecSDave Kleikamp 4398617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4399ac27a0ecSDave Kleikamp dev_t j_dev) 4400ac27a0ecSDave Kleikamp { 4401ac27a0ecSDave Kleikamp struct buffer_head *bh; 4402ac27a0ecSDave Kleikamp journal_t *journal; 4403617ba13bSMingming Cao ext4_fsblk_t start; 4404617ba13bSMingming Cao ext4_fsblk_t len; 4405ac27a0ecSDave Kleikamp int hblock, blocksize; 4406617ba13bSMingming Cao ext4_fsblk_t sb_block; 4407ac27a0ecSDave Kleikamp unsigned long offset; 4408617ba13bSMingming Cao struct ext4_super_block *es; 4409ac27a0ecSDave Kleikamp struct block_device *bdev; 4410ac27a0ecSDave Kleikamp 44110390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 44120390131bSFrank Mayhar 4413b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4414ac27a0ecSDave Kleikamp if (bdev == NULL) 4415ac27a0ecSDave Kleikamp return NULL; 4416ac27a0ecSDave Kleikamp 4417ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4418e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4419ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4420b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4421b31e1552SEric Sandeen "blocksize too small for journal device"); 4422ac27a0ecSDave Kleikamp goto out_bdev; 4423ac27a0ecSDave Kleikamp } 4424ac27a0ecSDave Kleikamp 4425617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4426617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4427ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4428ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4429b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4430b31e1552SEric Sandeen "external journal"); 4431ac27a0ecSDave Kleikamp goto out_bdev; 4432ac27a0ecSDave Kleikamp } 4433ac27a0ecSDave Kleikamp 44342716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4435617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4436ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4437617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4438b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4439b31e1552SEric Sandeen "bad superblock"); 4440ac27a0ecSDave Kleikamp brelse(bh); 4441ac27a0ecSDave Kleikamp goto out_bdev; 4442ac27a0ecSDave Kleikamp } 4443ac27a0ecSDave Kleikamp 4444df4763beSDarrick J. Wong if ((le32_to_cpu(es->s_feature_ro_compat) & 4445df4763beSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 4446df4763beSDarrick J. Wong es->s_checksum != ext4_superblock_csum(sb, es)) { 4447df4763beSDarrick J. Wong ext4_msg(sb, KERN_ERR, "external journal has " 4448df4763beSDarrick J. Wong "corrupt superblock"); 4449df4763beSDarrick J. Wong brelse(bh); 4450df4763beSDarrick J. Wong goto out_bdev; 4451df4763beSDarrick J. Wong } 4452df4763beSDarrick J. Wong 4453617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4454b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4455ac27a0ecSDave Kleikamp brelse(bh); 4456ac27a0ecSDave Kleikamp goto out_bdev; 4457ac27a0ecSDave Kleikamp } 4458ac27a0ecSDave Kleikamp 4459bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4460ac27a0ecSDave Kleikamp start = sb_block + 1; 4461ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4462ac27a0ecSDave Kleikamp 4463dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4464ac27a0ecSDave Kleikamp start, len, blocksize); 4465ac27a0ecSDave Kleikamp if (!journal) { 4466b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4467ac27a0ecSDave Kleikamp goto out_bdev; 4468ac27a0ecSDave Kleikamp } 4469ac27a0ecSDave Kleikamp journal->j_private = sb; 44709f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4471ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4472ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4473b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4474ac27a0ecSDave Kleikamp goto out_journal; 4475ac27a0ecSDave Kleikamp } 4476ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4477b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4478b31e1552SEric Sandeen "user (unsupported) - %d", 4479ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4480ac27a0ecSDave Kleikamp goto out_journal; 4481ac27a0ecSDave Kleikamp } 4482617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4483617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4484ac27a0ecSDave Kleikamp return journal; 44850b8e58a1SAndreas Dilger 4486ac27a0ecSDave Kleikamp out_journal: 4487dab291afSMingming Cao jbd2_journal_destroy(journal); 4488ac27a0ecSDave Kleikamp out_bdev: 4489617ba13bSMingming Cao ext4_blkdev_put(bdev); 4490ac27a0ecSDave Kleikamp return NULL; 4491ac27a0ecSDave Kleikamp } 4492ac27a0ecSDave Kleikamp 4493617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4494617ba13bSMingming Cao struct ext4_super_block *es, 4495ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4496ac27a0ecSDave Kleikamp { 4497ac27a0ecSDave Kleikamp journal_t *journal; 4498ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4499ac27a0ecSDave Kleikamp dev_t journal_dev; 4500ac27a0ecSDave Kleikamp int err = 0; 4501ac27a0ecSDave Kleikamp int really_read_only; 4502ac27a0ecSDave Kleikamp 45030390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 45040390131bSFrank Mayhar 4505ac27a0ecSDave Kleikamp if (journal_devnum && 4506ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4507b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4508b31e1552SEric Sandeen "numbers have changed"); 4509ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4510ac27a0ecSDave Kleikamp } else 4511ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4512ac27a0ecSDave Kleikamp 4513ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4514ac27a0ecSDave Kleikamp 4515ac27a0ecSDave Kleikamp /* 4516ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4517ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4518ac27a0ecSDave Kleikamp * can get read-write access to the device. 4519ac27a0ecSDave Kleikamp */ 4520617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4521ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4522b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4523b31e1552SEric Sandeen "required on readonly filesystem"); 4524ac27a0ecSDave Kleikamp if (really_read_only) { 4525b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4526b31e1552SEric Sandeen "unavailable, cannot proceed"); 4527ac27a0ecSDave Kleikamp return -EROFS; 4528ac27a0ecSDave Kleikamp } 4529b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4530b31e1552SEric Sandeen "be enabled during recovery"); 4531ac27a0ecSDave Kleikamp } 4532ac27a0ecSDave Kleikamp } 4533ac27a0ecSDave Kleikamp 4534ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4535b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4536b31e1552SEric Sandeen "and inode journals!"); 4537ac27a0ecSDave Kleikamp return -EINVAL; 4538ac27a0ecSDave Kleikamp } 4539ac27a0ecSDave Kleikamp 4540ac27a0ecSDave Kleikamp if (journal_inum) { 4541617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4542ac27a0ecSDave Kleikamp return -EINVAL; 4543ac27a0ecSDave Kleikamp } else { 4544617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4545ac27a0ecSDave Kleikamp return -EINVAL; 4546ac27a0ecSDave Kleikamp } 4547ac27a0ecSDave Kleikamp 454890576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4549b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 45504776004fSTheodore Ts'o 4551617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4552dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 45531c13d5c0STheodore Ts'o if (!err) { 45541c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 45551c13d5c0STheodore Ts'o if (save) 45561c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 45571c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4558dab291afSMingming Cao err = jbd2_journal_load(journal); 45591c13d5c0STheodore Ts'o if (save) 45601c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 45611c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 45621c13d5c0STheodore Ts'o kfree(save); 45631c13d5c0STheodore Ts'o } 4564ac27a0ecSDave Kleikamp 4565ac27a0ecSDave Kleikamp if (err) { 4566b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4567dab291afSMingming Cao jbd2_journal_destroy(journal); 4568ac27a0ecSDave Kleikamp return err; 4569ac27a0ecSDave Kleikamp } 4570ac27a0ecSDave Kleikamp 4571617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4572617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4573ac27a0ecSDave Kleikamp 4574c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4575ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4576ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4577ac27a0ecSDave Kleikamp 4578ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4579e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4580ac27a0ecSDave Kleikamp } 4581ac27a0ecSDave Kleikamp 4582ac27a0ecSDave Kleikamp return 0; 4583ac27a0ecSDave Kleikamp } 4584ac27a0ecSDave Kleikamp 4585e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4586ac27a0ecSDave Kleikamp { 4587e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4588617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4589c4be0c1dSTakashi Sato int error = 0; 4590ac27a0ecSDave Kleikamp 459108439fecSChristoph Hellwig if (!sbh) 4592c4be0c1dSTakashi Sato return error; 4593914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4594914258bfSTheodore Ts'o /* 4595914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4596914258bfSTheodore Ts'o * superblock failed. This could happen because the 4597914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4598914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4599914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4600914258bfSTheodore Ts'o * write and hope for the best. 4601914258bfSTheodore Ts'o */ 4602b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4603b31e1552SEric Sandeen "superblock detected"); 4604914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4605914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4606914258bfSTheodore Ts'o } 460771290b36STheodore Ts'o /* 460871290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 460971290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 461071290b36STheodore Ts'o * write time when we are mounting the root file system 461171290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 461271290b36STheodore Ts'o * for people who are east of GMT and who make their clock 461371290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 461471290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 461571290b36STheodore Ts'o * to complain and force a full file system check. 461671290b36STheodore Ts'o */ 461771290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4618ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4619f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4620afc32f7eSTheodore Ts'o es->s_kbytes_written = 4621afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4622afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4623afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4624f613dfcbSTheodore Ts'o else 4625f613dfcbSTheodore Ts'o es->s_kbytes_written = 4626f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 4627d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeclusters_counter)) 462857042651STheodore Ts'o ext4_free_blocks_count_set(es, 462957042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 463057042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 4631d5e03cbbSTheodore Ts'o if (percpu_counter_initialized(&EXT4_SB(sb)->s_freeinodes_counter)) 46327f93cff9STheodore Ts'o es->s_free_inodes_count = 46337f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 46345d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4635ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 463606db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4637ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4638914258bfSTheodore Ts'o if (sync) { 4639c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4640c4be0c1dSTakashi Sato if (error) 4641c4be0c1dSTakashi Sato return error; 4642c4be0c1dSTakashi Sato 4643c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4644c4be0c1dSTakashi Sato if (error) { 4645b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4646b31e1552SEric Sandeen "superblock"); 4647914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4648914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4649914258bfSTheodore Ts'o } 4650914258bfSTheodore Ts'o } 4651c4be0c1dSTakashi Sato return error; 4652ac27a0ecSDave Kleikamp } 4653ac27a0ecSDave Kleikamp 4654ac27a0ecSDave Kleikamp /* 4655ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4656ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4657ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4658ac27a0ecSDave Kleikamp */ 4659617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4660617ba13bSMingming Cao struct ext4_super_block *es) 4661ac27a0ecSDave Kleikamp { 4662617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4663ac27a0ecSDave Kleikamp 46640390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 46650390131bSFrank Mayhar BUG_ON(journal != NULL); 46660390131bSFrank Mayhar return; 46670390131bSFrank Mayhar } 4668dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46697ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 46707ffe1ea8SHidehiro Kawai goto out; 46717ffe1ea8SHidehiro Kawai 4672617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4673ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4674617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4675e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4676ac27a0ecSDave Kleikamp } 46777ffe1ea8SHidehiro Kawai 46787ffe1ea8SHidehiro Kawai out: 4679dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4680ac27a0ecSDave Kleikamp } 4681ac27a0ecSDave Kleikamp 4682ac27a0ecSDave Kleikamp /* 4683ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4684ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4685ac27a0ecSDave Kleikamp * main filesystem now. 4686ac27a0ecSDave Kleikamp */ 4687617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4688617ba13bSMingming Cao struct ext4_super_block *es) 4689ac27a0ecSDave Kleikamp { 4690ac27a0ecSDave Kleikamp journal_t *journal; 4691ac27a0ecSDave Kleikamp int j_errno; 4692ac27a0ecSDave Kleikamp const char *errstr; 4693ac27a0ecSDave Kleikamp 46940390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 46950390131bSFrank Mayhar 4696617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4697ac27a0ecSDave Kleikamp 4698ac27a0ecSDave Kleikamp /* 4699ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4700617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4701ac27a0ecSDave Kleikamp */ 4702ac27a0ecSDave Kleikamp 4703dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4704ac27a0ecSDave Kleikamp if (j_errno) { 4705ac27a0ecSDave Kleikamp char nbuf[16]; 4706ac27a0ecSDave Kleikamp 4707617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 470812062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4709ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 471012062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4711ac27a0ecSDave Kleikamp 4712617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4713617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4714e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4715ac27a0ecSDave Kleikamp 4716dab291afSMingming Cao jbd2_journal_clear_err(journal); 4717d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4718ac27a0ecSDave Kleikamp } 4719ac27a0ecSDave Kleikamp } 4720ac27a0ecSDave Kleikamp 4721ac27a0ecSDave Kleikamp /* 4722ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4723ac27a0ecSDave Kleikamp * and wait on the commit. 4724ac27a0ecSDave Kleikamp */ 4725617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4726ac27a0ecSDave Kleikamp { 4727ac27a0ecSDave Kleikamp journal_t *journal; 4728ac27a0ecSDave Kleikamp 4729ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4730ac27a0ecSDave Kleikamp return 0; 4731ac27a0ecSDave Kleikamp 4732617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4733b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4734ac27a0ecSDave Kleikamp } 4735ac27a0ecSDave Kleikamp 4736617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4737ac27a0ecSDave Kleikamp { 473814ce0cb4STheodore Ts'o int ret = 0; 47399eddacf9SJan Kara tid_t target; 474006a407f1SDmitry Monakhov bool needs_barrier = false; 47418d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4742ac27a0ecSDave Kleikamp 47439bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 47442e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4745a1177825SJan Kara /* 4746a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4747a1177825SJan Kara * no dirty dquots 4748a1177825SJan Kara */ 4749a1177825SJan Kara dquot_writeback_dquots(sb, -1); 475006a407f1SDmitry Monakhov /* 475106a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 475206a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 475306a407f1SDmitry Monakhov * transaction_commit will do it for us. 475406a407f1SDmitry Monakhov */ 4755bda32530STheodore Ts'o if (sbi->s_journal) { 475606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 475706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 475806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 475906a407f1SDmitry Monakhov needs_barrier = true; 476006a407f1SDmitry Monakhov 47618d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4762ac27a0ecSDave Kleikamp if (wait) 4763bda32530STheodore Ts'o ret = jbd2_log_wait_commit(sbi->s_journal, 4764bda32530STheodore Ts'o target); 47650390131bSFrank Mayhar } 4766bda32530STheodore Ts'o } else if (wait && test_opt(sb, BARRIER)) 4767bda32530STheodore Ts'o needs_barrier = true; 476806a407f1SDmitry Monakhov if (needs_barrier) { 476906a407f1SDmitry Monakhov int err; 477006a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 477106a407f1SDmitry Monakhov if (!ret) 477206a407f1SDmitry Monakhov ret = err; 477306a407f1SDmitry Monakhov } 477406a407f1SDmitry Monakhov 477506a407f1SDmitry Monakhov return ret; 477606a407f1SDmitry Monakhov } 477706a407f1SDmitry Monakhov 4778ac27a0ecSDave Kleikamp /* 4779ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4780ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4781be4f27d3SYongqiang Yang * 4782be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 47838e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 47848e8ad8a5SJan Kara * modifications. 4785ac27a0ecSDave Kleikamp */ 4786c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4787ac27a0ecSDave Kleikamp { 4788c4be0c1dSTakashi Sato int error = 0; 4789c4be0c1dSTakashi Sato journal_t *journal; 4790ac27a0ecSDave Kleikamp 47919ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47929ca92389STheodore Ts'o return 0; 47939ca92389STheodore Ts'o 4794c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4795ac27a0ecSDave Kleikamp 4796bb044576STheodore Ts'o if (journal) { 4797ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4798dab291afSMingming Cao jbd2_journal_lock_updates(journal); 47997ffe1ea8SHidehiro Kawai 48007ffe1ea8SHidehiro Kawai /* 4801bb044576STheodore Ts'o * Don't clear the needs_recovery flag if we failed to 4802bb044576STheodore Ts'o * flush the journal. 48037ffe1ea8SHidehiro Kawai */ 4804c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 48056b0310fbSEric Sandeen if (error < 0) 48066b0310fbSEric Sandeen goto out; 4807bb044576STheodore Ts'o } 4808ac27a0ecSDave Kleikamp 4809ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4810617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4811e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 48126b0310fbSEric Sandeen out: 4813bb044576STheodore Ts'o if (journal) 48148e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 4815bb044576STheodore Ts'o jbd2_journal_unlock_updates(journal); 48166b0310fbSEric Sandeen return error; 4817ac27a0ecSDave Kleikamp } 4818ac27a0ecSDave Kleikamp 4819ac27a0ecSDave Kleikamp /* 4820ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4821ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4822ac27a0ecSDave Kleikamp */ 4823c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4824ac27a0ecSDave Kleikamp { 48259ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48269ca92389STheodore Ts'o return 0; 48279ca92389STheodore Ts'o 48289ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4829617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4830e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4831c4be0c1dSTakashi Sato return 0; 4832ac27a0ecSDave Kleikamp } 4833ac27a0ecSDave Kleikamp 4834673c6100STheodore Ts'o /* 4835673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4836673c6100STheodore Ts'o */ 4837673c6100STheodore Ts'o struct ext4_mount_options { 4838673c6100STheodore Ts'o unsigned long s_mount_opt; 4839a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 484008cefc7aSEric W. Biederman kuid_t s_resuid; 484108cefc7aSEric W. Biederman kgid_t s_resgid; 4842673c6100STheodore Ts'o unsigned long s_commit_interval; 4843673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4844673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4845673c6100STheodore Ts'o int s_jquota_fmt; 4846a2d4a646SJan Kara char *s_qf_names[EXT4_MAXQUOTAS]; 4847673c6100STheodore Ts'o #endif 4848673c6100STheodore Ts'o }; 4849673c6100STheodore Ts'o 4850617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4851ac27a0ecSDave Kleikamp { 4852617ba13bSMingming Cao struct ext4_super_block *es; 4853617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4854ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4855617ba13bSMingming Cao struct ext4_mount_options old_opts; 4856c79d967dSChristoph Hellwig int enable_quota = 0; 48578a266467STheodore Ts'o ext4_group_t g; 4858b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4859c5e06d10SJohann Lombardi int err = 0; 4860ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 486103dafb5fSChen Gang int i, j; 4862ac27a0ecSDave Kleikamp #endif 4863d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4864ac27a0ecSDave Kleikamp 4865ac27a0ecSDave Kleikamp /* Store the original options */ 4866ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4867ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4868a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4869ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4870ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4871ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 487230773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 487330773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4874ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4875ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4876a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 487703dafb5fSChen Gang if (sbi->s_qf_names[i]) { 487803dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 487903dafb5fSChen Gang GFP_KERNEL); 488003dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 488103dafb5fSChen Gang for (j = 0; j < i; j++) 488203dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 48833e36a163SWei Yongjun kfree(orig_data); 488403dafb5fSChen Gang return -ENOMEM; 488503dafb5fSChen Gang } 488603dafb5fSChen Gang } else 488703dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4888ac27a0ecSDave Kleikamp #endif 4889b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4890b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4891ac27a0ecSDave Kleikamp 4892661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4893ac27a0ecSDave Kleikamp err = -EINVAL; 4894ac27a0ecSDave Kleikamp goto restore_opts; 4895ac27a0ecSDave Kleikamp } 4896ac27a0ecSDave Kleikamp 48976b992ff2SDarrick J. Wong if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^ 48986b992ff2SDarrick J. Wong test_opt(sb, JOURNAL_CHECKSUM)) { 48996b992ff2SDarrick J. Wong ext4_msg(sb, KERN_ERR, "changing journal_checksum " 49002d5b86e0SEric Sandeen "during remount not supported; ignoring"); 49012d5b86e0SEric Sandeen sbi->s_mount_opt ^= EXT4_MOUNT_JOURNAL_CHECKSUM; 4902c6d3d56dSDarrick J. Wong } 4903c6d3d56dSDarrick J. Wong 49046ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 49056ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 49066ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49076ae6514bSPiotr Sarna "both data=journal and delalloc"); 49086ae6514bSPiotr Sarna err = -EINVAL; 49096ae6514bSPiotr Sarna goto restore_opts; 49106ae6514bSPiotr Sarna } 49116ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 49126ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 49136ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 49146ae6514bSPiotr Sarna err = -EINVAL; 49156ae6514bSPiotr Sarna goto restore_opts; 49166ae6514bSPiotr Sarna } 4917923ae0ffSRoss Zwisler if (test_opt(sb, DAX)) { 4918923ae0ffSRoss Zwisler ext4_msg(sb, KERN_ERR, "can't mount with " 4919923ae0ffSRoss Zwisler "both data=journal and dax"); 4920923ae0ffSRoss Zwisler err = -EINVAL; 4921923ae0ffSRoss Zwisler goto restore_opts; 4922923ae0ffSRoss Zwisler } 4923923ae0ffSRoss Zwisler } 4924923ae0ffSRoss Zwisler 4925923ae0ffSRoss Zwisler if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT4_MOUNT_DAX) { 4926923ae0ffSRoss Zwisler ext4_msg(sb, KERN_WARNING, "warning: refusing change of " 4927923ae0ffSRoss Zwisler "dax flag with busy inodes while remounting"); 4928923ae0ffSRoss Zwisler sbi->s_mount_opt ^= EXT4_MOUNT_DAX; 49296ae6514bSPiotr Sarna } 49306ae6514bSPiotr Sarna 49314ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4932c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4933ac27a0ecSDave Kleikamp 4934ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4935482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4936ac27a0ecSDave Kleikamp 4937ac27a0ecSDave Kleikamp es = sbi->s_es; 4938ac27a0ecSDave Kleikamp 4939b3881f74STheodore Ts'o if (sbi->s_journal) { 4940617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4941b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4942b3881f74STheodore Ts'o } 4943ac27a0ecSDave Kleikamp 4944661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 49454ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4946ac27a0ecSDave Kleikamp err = -EROFS; 4947ac27a0ecSDave Kleikamp goto restore_opts; 4948ac27a0ecSDave Kleikamp } 4949ac27a0ecSDave Kleikamp 4950ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 495138c03b34STheodore Ts'o err = sync_filesystem(sb); 495238c03b34STheodore Ts'o if (err < 0) 495338c03b34STheodore Ts'o goto restore_opts; 49540f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 49550f0dd62fSChristoph Hellwig if (err < 0) 4956c79d967dSChristoph Hellwig goto restore_opts; 4957c79d967dSChristoph Hellwig 4958ac27a0ecSDave Kleikamp /* 4959ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4960ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4961ac27a0ecSDave Kleikamp */ 4962ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4963ac27a0ecSDave Kleikamp 4964ac27a0ecSDave Kleikamp /* 4965ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4966ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4967ac27a0ecSDave Kleikamp * mark the partition as valid again. 4968ac27a0ecSDave Kleikamp */ 4969617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4970617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4971ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4972ac27a0ecSDave Kleikamp 4973a63c9eb2STheodore Ts'o if (sbi->s_journal) 4974617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4975ac27a0ecSDave Kleikamp } else { 4976a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 49772cb5cc8bSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 49782cb5cc8bSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_READONLY) || 49792cb5cc8bSDarrick J. Wong !ext4_feature_set_ok(sb, 0)) { 4980ac27a0ecSDave Kleikamp err = -EROFS; 4981ac27a0ecSDave Kleikamp goto restore_opts; 4982ac27a0ecSDave Kleikamp } 4983ead6596bSEric Sandeen /* 49848a266467STheodore Ts'o * Make sure the group descriptor checksums 49850b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 49868a266467STheodore Ts'o */ 49878a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 49888a266467STheodore Ts'o struct ext4_group_desc *gdp = 49898a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 49908a266467STheodore Ts'o 4991feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4992b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4993b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 49948a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 49958a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 49968a266467STheodore Ts'o err = -EINVAL; 49978a266467STheodore Ts'o goto restore_opts; 49988a266467STheodore Ts'o } 49998a266467STheodore Ts'o } 50008a266467STheodore Ts'o 50018a266467STheodore Ts'o /* 5002ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 5003ead6596bSEric Sandeen * around from a previously readonly bdev mount, 5004ead6596bSEric Sandeen * require a full umount/remount for now. 5005ead6596bSEric Sandeen */ 5006ead6596bSEric Sandeen if (es->s_last_orphan) { 5007b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 5008ead6596bSEric Sandeen "remount RDWR because of unprocessed " 5009ead6596bSEric Sandeen "orphan inode list. Please " 5010b31e1552SEric Sandeen "umount/remount instead"); 5011ead6596bSEric Sandeen err = -EINVAL; 5012ead6596bSEric Sandeen goto restore_opts; 5013ead6596bSEric Sandeen } 5014ead6596bSEric Sandeen 5015ac27a0ecSDave Kleikamp /* 5016ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 5017ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 5018ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 5019ac27a0ecSDave Kleikamp * the partition.) 5020ac27a0ecSDave Kleikamp */ 50210390131bSFrank Mayhar if (sbi->s_journal) 5022617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 5023ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 5024617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 5025ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 5026c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 5027c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 5028c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 5029c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 5030c5e06d10SJohann Lombardi err = -EROFS; 5031c5e06d10SJohann Lombardi goto restore_opts; 5032c5e06d10SJohann Lombardi } 5033c79d967dSChristoph Hellwig enable_quota = 1; 5034ac27a0ecSDave Kleikamp } 5035ac27a0ecSDave Kleikamp } 5036bfff6873SLukas Czerner 5037bfff6873SLukas Czerner /* 5038bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 5039bfff6873SLukas Czerner * current settings 5040bfff6873SLukas Czerner */ 5041bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 5042bfff6873SLukas Czerner ext4_unregister_li_request(sb); 5043bfff6873SLukas Czerner else { 5044bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 5045bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 5046bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 5047bfff6873SLukas Czerner } 5048bfff6873SLukas Czerner 50496fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 5050d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 5051e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 50520390131bSFrank Mayhar 5053ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5054ac27a0ecSDave Kleikamp /* Release old quota file names */ 5055a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) 5056ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 50577c319d32SAditya Kali if (enable_quota) { 50587c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 50590f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 50607c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 50617c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 50627c319d32SAditya Kali err = ext4_enable_quotas(sb); 506307724f98STheodore Ts'o if (err) 50647c319d32SAditya Kali goto restore_opts; 50657c319d32SAditya Kali } 50667c319d32SAditya Kali } 50677c319d32SAditya Kali #endif 5068d4c402d9SCurt Wohlgemuth 5069a26f4992STheodore Ts'o *flags = (*flags & ~MS_LAZYTIME) | (sb->s_flags & MS_LAZYTIME); 5070d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 5071d4c402d9SCurt Wohlgemuth kfree(orig_data); 5072ac27a0ecSDave Kleikamp return 0; 50730b8e58a1SAndreas Dilger 5074ac27a0ecSDave Kleikamp restore_opts: 5075ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 5076ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 5077a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 5078ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 5079ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 5080ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 508130773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 508230773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 5083ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5084ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 5085a2d4a646SJan Kara for (i = 0; i < EXT4_MAXQUOTAS; i++) { 5086ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 5087ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 5088ac27a0ecSDave Kleikamp } 5089ac27a0ecSDave Kleikamp #endif 5090d4c402d9SCurt Wohlgemuth kfree(orig_data); 5091ac27a0ecSDave Kleikamp return err; 5092ac27a0ecSDave Kleikamp } 5093ac27a0ecSDave Kleikamp 5094617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 5095ac27a0ecSDave Kleikamp { 5096ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 5097617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 5098617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 509927dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 5100960cc398SPekka Enberg u64 fsid; 5101d02a9391SKazuya Mio s64 bfree; 510227dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 5103ac27a0ecSDave Kleikamp 5104952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 5105952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 5106ac27a0ecSDave Kleikamp 5107617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 5108ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 5109b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 511057042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 511157042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 5112d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 511357042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 511427dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 511527dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 511627dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 5117ac27a0ecSDave Kleikamp buf->f_bavail = 0; 5118ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 511952d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 5120617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 5121960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 5122960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 5123960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 5124960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 51250b8e58a1SAndreas Dilger 5126ac27a0ecSDave Kleikamp return 0; 5127ac27a0ecSDave Kleikamp } 5128ac27a0ecSDave Kleikamp 51290b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 51300b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5131ac27a0ecSDave Kleikamp * Process 1 Process 2 5132617ba13bSMingming Cao * ext4_create() quota_sync() 5133dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5134871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5135dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5136ac27a0ecSDave Kleikamp * 5137ac27a0ecSDave Kleikamp */ 5138ac27a0ecSDave Kleikamp 5139ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5140ac27a0ecSDave Kleikamp 5141ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5142ac27a0ecSDave Kleikamp { 51434c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5144ac27a0ecSDave Kleikamp } 5145ac27a0ecSDave Kleikamp 5146617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5147ac27a0ecSDave Kleikamp { 5148ac27a0ecSDave Kleikamp int ret, err; 5149ac27a0ecSDave Kleikamp handle_t *handle; 5150ac27a0ecSDave Kleikamp struct inode *inode; 5151ac27a0ecSDave Kleikamp 5152ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 51539924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5154617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5155ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5156ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5157ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5158617ba13bSMingming Cao err = ext4_journal_stop(handle); 5159ac27a0ecSDave Kleikamp if (!ret) 5160ac27a0ecSDave Kleikamp ret = err; 5161ac27a0ecSDave Kleikamp return ret; 5162ac27a0ecSDave Kleikamp } 5163ac27a0ecSDave Kleikamp 5164617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5165ac27a0ecSDave Kleikamp { 5166ac27a0ecSDave Kleikamp int ret, err; 5167ac27a0ecSDave Kleikamp handle_t *handle; 5168ac27a0ecSDave Kleikamp 51699924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5170617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5171ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5172ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5173ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5174617ba13bSMingming Cao err = ext4_journal_stop(handle); 5175ac27a0ecSDave Kleikamp if (!ret) 5176ac27a0ecSDave Kleikamp ret = err; 5177ac27a0ecSDave Kleikamp return ret; 5178ac27a0ecSDave Kleikamp } 5179ac27a0ecSDave Kleikamp 5180617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5181ac27a0ecSDave Kleikamp { 5182ac27a0ecSDave Kleikamp int ret, err; 5183ac27a0ecSDave Kleikamp handle_t *handle; 5184ac27a0ecSDave Kleikamp 51859924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5186617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 51879c3013e9SJan Kara if (IS_ERR(handle)) { 51889c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 51899c3013e9SJan Kara dquot_release(dquot); 5190ac27a0ecSDave Kleikamp return PTR_ERR(handle); 51919c3013e9SJan Kara } 5192ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5193617ba13bSMingming Cao err = ext4_journal_stop(handle); 5194ac27a0ecSDave Kleikamp if (!ret) 5195ac27a0ecSDave Kleikamp ret = err; 5196ac27a0ecSDave Kleikamp return ret; 5197ac27a0ecSDave Kleikamp } 5198ac27a0ecSDave Kleikamp 5199617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5200ac27a0ecSDave Kleikamp { 5201262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5202262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5203262b4662SJan Kara 52042c8be6b2SJan Kara /* Are we journaling quotas? */ 5205262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5206262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5207ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5208617ba13bSMingming Cao return ext4_write_dquot(dquot); 5209ac27a0ecSDave Kleikamp } else { 5210ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5211ac27a0ecSDave Kleikamp } 5212ac27a0ecSDave Kleikamp } 5213ac27a0ecSDave Kleikamp 5214617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5215ac27a0ecSDave Kleikamp { 5216ac27a0ecSDave Kleikamp int ret, err; 5217ac27a0ecSDave Kleikamp handle_t *handle; 5218ac27a0ecSDave Kleikamp 5219ac27a0ecSDave Kleikamp /* Data block + inode block */ 52209924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5221ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5222ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5223ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5224617ba13bSMingming Cao err = ext4_journal_stop(handle); 5225ac27a0ecSDave Kleikamp if (!ret) 5226ac27a0ecSDave Kleikamp ret = err; 5227ac27a0ecSDave Kleikamp return ret; 5228ac27a0ecSDave Kleikamp } 5229ac27a0ecSDave Kleikamp 5230ac27a0ecSDave Kleikamp /* 5231ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5232ac27a0ecSDave Kleikamp * the quota file and such... 5233ac27a0ecSDave Kleikamp */ 5234617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5235ac27a0ecSDave Kleikamp { 5236287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5237617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5238ac27a0ecSDave Kleikamp } 5239ac27a0ecSDave Kleikamp 5240ac27a0ecSDave Kleikamp /* 5241ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5242ac27a0ecSDave Kleikamp */ 5243617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5244f00c9e44SJan Kara struct path *path) 5245ac27a0ecSDave Kleikamp { 5246ac27a0ecSDave Kleikamp int err; 5247ac27a0ecSDave Kleikamp 5248ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5249ac27a0ecSDave Kleikamp return -EINVAL; 52500623543bSJan Kara 5251ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5252d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5253ac27a0ecSDave Kleikamp return -EXDEV; 52540623543bSJan Kara /* Journaling quota? */ 52550623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 52562b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5257f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5258b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5259b31e1552SEric Sandeen "Quota file not on filesystem root. " 5260b31e1552SEric Sandeen "Journaled quota will not work"); 52610623543bSJan Kara } 52620623543bSJan Kara 52630623543bSJan Kara /* 52640623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 52650623543bSJan Kara * all updates to the file when we bypass pagecache... 52660623543bSJan Kara */ 52670390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5268f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 52690623543bSJan Kara /* 52700623543bSJan Kara * We don't need to lock updates but journal_flush() could 52710623543bSJan Kara * otherwise be livelocked... 52720623543bSJan Kara */ 52730623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 52747ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 52750623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5276f00c9e44SJan Kara if (err) 52777ffe1ea8SHidehiro Kawai return err; 52787ffe1ea8SHidehiro Kawai } 52790623543bSJan Kara 5280f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5281ac27a0ecSDave Kleikamp } 5282ac27a0ecSDave Kleikamp 52837c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 52847c319d32SAditya Kali unsigned int flags) 52857c319d32SAditya Kali { 52867c319d32SAditya Kali int err; 52877c319d32SAditya Kali struct inode *qf_inode; 5288a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 52897c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 52907c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 52917c319d32SAditya Kali }; 52927c319d32SAditya Kali 52937c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 52947c319d32SAditya Kali 52957c319d32SAditya Kali if (!qf_inums[type]) 52967c319d32SAditya Kali return -EPERM; 52977c319d32SAditya Kali 52987c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 52997c319d32SAditya Kali if (IS_ERR(qf_inode)) { 53007c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 53017c319d32SAditya Kali return PTR_ERR(qf_inode); 53027c319d32SAditya Kali } 53037c319d32SAditya Kali 5304bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5305bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 53067c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 53077c319d32SAditya Kali iput(qf_inode); 53087c319d32SAditya Kali 53097c319d32SAditya Kali return err; 53107c319d32SAditya Kali } 53117c319d32SAditya Kali 53127c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 53137c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 53147c319d32SAditya Kali { 53157c319d32SAditya Kali int type, err = 0; 5316a2d4a646SJan Kara unsigned long qf_inums[EXT4_MAXQUOTAS] = { 53177c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 53187c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 53197c319d32SAditya Kali }; 53207c319d32SAditya Kali 53217c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 5322a2d4a646SJan Kara for (type = 0; type < EXT4_MAXQUOTAS; type++) { 53237c319d32SAditya Kali if (qf_inums[type]) { 53247c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 53257c319d32SAditya Kali DQUOT_USAGE_ENABLED); 53267c319d32SAditya Kali if (err) { 53277c319d32SAditya Kali ext4_warning(sb, 532872ba7450STheodore Ts'o "Failed to enable quota tracking " 532972ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 533072ba7450STheodore Ts'o "e2fsck to fix.", type, err); 53317c319d32SAditya Kali return err; 53327c319d32SAditya Kali } 53337c319d32SAditya Kali } 53347c319d32SAditya Kali } 53357c319d32SAditya Kali return 0; 53367c319d32SAditya Kali } 53377c319d32SAditya Kali 5338ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5339ca0e05e4SDmitry Monakhov { 534021f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 534121f97697SJan Kara handle_t *handle; 534221f97697SJan Kara 534387009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 534487009d86SDmitry Monakhov * Caller already holds s_umount sem */ 534587009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5346ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5347ca0e05e4SDmitry Monakhov 53480b268590SAmir Goldstein if (!inode) 53490b268590SAmir Goldstein goto out; 53500b268590SAmir Goldstein 535121f97697SJan Kara /* Update modification times of quota files when userspace can 535221f97697SJan Kara * start looking at them */ 53539924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 535421f97697SJan Kara if (IS_ERR(handle)) 535521f97697SJan Kara goto out; 535621f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 535721f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 535821f97697SJan Kara ext4_journal_stop(handle); 535921f97697SJan Kara 536021f97697SJan Kara out: 5361ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5362ca0e05e4SDmitry Monakhov } 5363ca0e05e4SDmitry Monakhov 5364ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5365ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5366ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5367ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5368617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5369ac27a0ecSDave Kleikamp size_t len, loff_t off) 5370ac27a0ecSDave Kleikamp { 5371ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5372725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5373ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5374ac27a0ecSDave Kleikamp int tocopy; 5375ac27a0ecSDave Kleikamp size_t toread; 5376ac27a0ecSDave Kleikamp struct buffer_head *bh; 5377ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5378ac27a0ecSDave Kleikamp 5379ac27a0ecSDave Kleikamp if (off > i_size) 5380ac27a0ecSDave Kleikamp return 0; 5381ac27a0ecSDave Kleikamp if (off+len > i_size) 5382ac27a0ecSDave Kleikamp len = i_size-off; 5383ac27a0ecSDave Kleikamp toread = len; 5384ac27a0ecSDave Kleikamp while (toread > 0) { 5385ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5386ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 53871c215028STheodore Ts'o bh = ext4_bread(NULL, inode, blk, 0); 53881c215028STheodore Ts'o if (IS_ERR(bh)) 53891c215028STheodore Ts'o return PTR_ERR(bh); 5390ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5391ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5392ac27a0ecSDave Kleikamp else 5393ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5394ac27a0ecSDave Kleikamp brelse(bh); 5395ac27a0ecSDave Kleikamp offset = 0; 5396ac27a0ecSDave Kleikamp toread -= tocopy; 5397ac27a0ecSDave Kleikamp data += tocopy; 5398ac27a0ecSDave Kleikamp blk++; 5399ac27a0ecSDave Kleikamp } 5400ac27a0ecSDave Kleikamp return len; 5401ac27a0ecSDave Kleikamp } 5402ac27a0ecSDave Kleikamp 5403ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5404ac27a0ecSDave Kleikamp * enough credits) */ 5405617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5406ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5407ac27a0ecSDave Kleikamp { 5408ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5409725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 54101c215028STheodore Ts'o int err, offset = off & (sb->s_blocksize - 1); 5411ac27a0ecSDave Kleikamp struct buffer_head *bh; 5412ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5413ac27a0ecSDave Kleikamp 54140390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5415b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5416b31e1552SEric Sandeen " cancelled because transaction is not started", 54179c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 54189c3013e9SJan Kara return -EIO; 54199c3013e9SJan Kara } 542067eeb568SDmitry Monakhov /* 542167eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 542267eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 542367eeb568SDmitry Monakhov */ 542467eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 542567eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 542667eeb568SDmitry Monakhov " cancelled because not block aligned", 542767eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 542867eeb568SDmitry Monakhov return -EIO; 542967eeb568SDmitry Monakhov } 543067eeb568SDmitry Monakhov 54311c215028STheodore Ts'o bh = ext4_bread(handle, inode, blk, 1); 54321c215028STheodore Ts'o if (IS_ERR(bh)) 54331c215028STheodore Ts'o return PTR_ERR(bh); 5434ac27a0ecSDave Kleikamp if (!bh) 5435ac27a0ecSDave Kleikamp goto out; 54365d601255Sliang xie BUFFER_TRACE(bh, "get write access"); 5437617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5438ac27a0ecSDave Kleikamp if (err) { 5439ac27a0ecSDave Kleikamp brelse(bh); 54401c215028STheodore Ts'o return err; 5441ac27a0ecSDave Kleikamp } 5442ac27a0ecSDave Kleikamp lock_buffer(bh); 544367eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5444ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5445ac27a0ecSDave Kleikamp unlock_buffer(bh); 54460390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5447ac27a0ecSDave Kleikamp brelse(bh); 5448ac27a0ecSDave Kleikamp out: 544967eeb568SDmitry Monakhov if (inode->i_size < off + len) { 545067eeb568SDmitry Monakhov i_size_write(inode, off + len); 5451617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5452617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 545321f97697SJan Kara } 545467eeb568SDmitry Monakhov return len; 5455ac27a0ecSDave Kleikamp } 5456ac27a0ecSDave Kleikamp 5457ac27a0ecSDave Kleikamp #endif 5458ac27a0ecSDave Kleikamp 5459152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5460152a0836SAl Viro const char *dev_name, void *data) 5461ac27a0ecSDave Kleikamp { 5462152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5463ac27a0ecSDave Kleikamp } 5464ac27a0ecSDave Kleikamp 546537f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 546624b58424STheodore Ts'o static inline void register_as_ext2(void) 546724b58424STheodore Ts'o { 546824b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 546924b58424STheodore Ts'o if (err) 547024b58424STheodore Ts'o printk(KERN_WARNING 547124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 547224b58424STheodore Ts'o } 547324b58424STheodore Ts'o 547424b58424STheodore Ts'o static inline void unregister_as_ext2(void) 547524b58424STheodore Ts'o { 547624b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 547724b58424STheodore Ts'o } 54782035e776STheodore Ts'o 54792035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 54802035e776STheodore Ts'o { 54812035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 54822035e776STheodore Ts'o return 0; 54832035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54842035e776STheodore Ts'o return 1; 54852035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 54862035e776STheodore Ts'o return 0; 54872035e776STheodore Ts'o return 1; 54882035e776STheodore Ts'o } 548924b58424STheodore Ts'o #else 549024b58424STheodore Ts'o static inline void register_as_ext2(void) { } 549124b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 54922035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 549324b58424STheodore Ts'o #endif 549424b58424STheodore Ts'o 549537f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 549624b58424STheodore Ts'o static inline void register_as_ext3(void) 549724b58424STheodore Ts'o { 549824b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 549924b58424STheodore Ts'o if (err) 550024b58424STheodore Ts'o printk(KERN_WARNING 550124b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 550224b58424STheodore Ts'o } 550324b58424STheodore Ts'o 550424b58424STheodore Ts'o static inline void unregister_as_ext3(void) 550524b58424STheodore Ts'o { 550624b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 550724b58424STheodore Ts'o } 55082035e776STheodore Ts'o 55092035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 55102035e776STheodore Ts'o { 55112035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 55122035e776STheodore Ts'o return 0; 55132035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 55142035e776STheodore Ts'o return 0; 55152035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 55162035e776STheodore Ts'o return 1; 55172035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 55182035e776STheodore Ts'o return 0; 55192035e776STheodore Ts'o return 1; 55202035e776STheodore Ts'o } 552124b58424STheodore Ts'o #else 552224b58424STheodore Ts'o static inline void register_as_ext3(void) { } 552324b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 55242035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 552524b58424STheodore Ts'o #endif 552624b58424STheodore Ts'o 552703010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5528ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 552903010a33STheodore Ts'o .name = "ext4", 5530152a0836SAl Viro .mount = ext4_mount, 5531ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5532ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5533ac27a0ecSDave Kleikamp }; 55347f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5535ac27a0ecSDave Kleikamp 55368f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5537857ac889SLukas Czerner { 5538857ac889SLukas Czerner struct ext4_features *ef; 5539857ac889SLukas Czerner int ret = -ENOMEM; 5540857ac889SLukas Czerner 5541857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5542857ac889SLukas Czerner if (!ef) 5543857ac889SLukas Czerner goto out; 5544857ac889SLukas Czerner 5545857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5546857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5547857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5548857ac889SLukas Czerner "features"); 5549857ac889SLukas Czerner if (ret) { 5550857ac889SLukas Czerner kfree(ef); 5551857ac889SLukas Czerner goto out; 5552857ac889SLukas Czerner } 5553857ac889SLukas Czerner 5554857ac889SLukas Czerner ext4_feat = ef; 5555857ac889SLukas Czerner ret = 0; 5556857ac889SLukas Czerner out: 5557857ac889SLukas Czerner return ret; 5558857ac889SLukas Czerner } 5559857ac889SLukas Czerner 55608f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 55618f021222SLukas Czerner { 55628f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 55638f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 55648f021222SLukas Czerner kfree(ext4_feat); 55658f021222SLukas Czerner } 55668f021222SLukas Czerner 5567e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5568e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5569e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5570e9e3bcecSEric Sandeen 55715dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5572ac27a0ecSDave Kleikamp { 5573e9e3bcecSEric Sandeen int i, err; 5574c9de560dSAlex Tomas 557507c0c5d8SAl Viro ext4_li_info = NULL; 557607c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 557707c0c5d8SAl Viro 55789a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 557912e9b892SDmitry Monakhov ext4_check_flag_values(); 5580e9e3bcecSEric Sandeen 5581e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5582e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5583e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5584e9e3bcecSEric Sandeen } 5585e9e3bcecSEric Sandeen 558651865fdaSZheng Liu err = ext4_init_es(); 55876fd058f7STheodore Ts'o if (err) 55886fd058f7STheodore Ts'o return err; 558951865fdaSZheng Liu 559051865fdaSZheng Liu err = ext4_init_pageio(); 559151865fdaSZheng Liu if (err) 559251865fdaSZheng Liu goto out7; 559351865fdaSZheng Liu 55945dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5595bd2d0210STheodore Ts'o if (err) 5596d44651d0SFabrice Jouhaud goto out6; 55973197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55980e376b1eSTheodore Ts'o if (!ext4_kset) { 55990e376b1eSTheodore Ts'o err = -ENOMEM; 5600dd68314cSTheodore Ts'o goto out5; 56010e376b1eSTheodore Ts'o } 5602d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5603857ac889SLukas Czerner 5604857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5605dd68314cSTheodore Ts'o if (err) 5606dd68314cSTheodore Ts'o goto out4; 5607857ac889SLukas Czerner 56085dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5609ac27a0ecSDave Kleikamp if (err) 5610c9de560dSAlex Tomas goto out2; 56119c191f70ST Makphaibulchoke else 56129c191f70ST Makphaibulchoke ext4_mballoc_ready = 1; 5613ac27a0ecSDave Kleikamp err = init_inodecache(); 5614ac27a0ecSDave Kleikamp if (err) 5615ac27a0ecSDave Kleikamp goto out1; 561624b58424STheodore Ts'o register_as_ext3(); 56172035e776STheodore Ts'o register_as_ext2(); 561803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5619ac27a0ecSDave Kleikamp if (err) 5620ac27a0ecSDave Kleikamp goto out; 5621bfff6873SLukas Czerner 5622ac27a0ecSDave Kleikamp return 0; 5623ac27a0ecSDave Kleikamp out: 562424b58424STheodore Ts'o unregister_as_ext2(); 562524b58424STheodore Ts'o unregister_as_ext3(); 5626ac27a0ecSDave Kleikamp destroy_inodecache(); 5627ac27a0ecSDave Kleikamp out1: 56289c191f70ST Makphaibulchoke ext4_mballoc_ready = 0; 56295dabfc78STheodore Ts'o ext4_exit_mballoc(); 56309c191f70ST Makphaibulchoke out2: 56318f021222SLukas Czerner ext4_exit_feat_adverts(); 56326fd058f7STheodore Ts'o out4: 5633d44651d0SFabrice Jouhaud if (ext4_proc_root) 5634dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5635dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5636d44651d0SFabrice Jouhaud out5: 5637dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5638d44651d0SFabrice Jouhaud out6: 56395dabfc78STheodore Ts'o ext4_exit_pageio(); 564051865fdaSZheng Liu out7: 564151865fdaSZheng Liu ext4_exit_es(); 564251865fdaSZheng Liu 5643ac27a0ecSDave Kleikamp return err; 5644ac27a0ecSDave Kleikamp } 5645ac27a0ecSDave Kleikamp 56465dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5647ac27a0ecSDave Kleikamp { 5648bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 564924b58424STheodore Ts'o unregister_as_ext2(); 565024b58424STheodore Ts'o unregister_as_ext3(); 565103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5652ac27a0ecSDave Kleikamp destroy_inodecache(); 56535dabfc78STheodore Ts'o ext4_exit_mballoc(); 56548f021222SLukas Czerner ext4_exit_feat_adverts(); 56559f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 56563197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 56575dabfc78STheodore Ts'o ext4_exit_system_zone(); 56585dabfc78STheodore Ts'o ext4_exit_pageio(); 5659dd12ed14SEric Sandeen ext4_exit_es(); 5660ac27a0ecSDave Kleikamp } 5661ac27a0ecSDave Kleikamp 5662ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 566383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5664ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 56655dabfc78STheodore Ts'o module_init(ext4_init_fs) 56665dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5667