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> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.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" 473dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 48ac27a0ecSDave Kleikamp #include "xattr.h" 49ac27a0ecSDave Kleikamp #include "acl.h" 503661d286STheodore Ts'o #include "mballoc.h" 51ac27a0ecSDave Kleikamp 529bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 539bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 549bffad1eSTheodore Ts'o 551f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 563197ebdbSTheodore Ts'o static struct kset *ext4_kset; 570b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 580b75a840SLukas Czerner static struct mutex ext4_li_mtx; 590b75a840SLukas Czerner static struct ext4_features *ext4_feat; 609f6200bbSTheodore Ts'o 61617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 62ac27a0ecSDave Kleikamp unsigned long journal_devnum); 63e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 64617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 65617ba13bSMingming Cao struct ext4_super_block *es); 66617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 67617ba13bSMingming Cao struct ext4_super_block *es); 68617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 69617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 70ac27a0ecSDave Kleikamp char nbuf[16]); 71617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 72617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 73c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 74617ba13bSMingming Cao static void ext4_write_super(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); 84ac27a0ecSDave Kleikamp 852035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 862035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 872035e776STheodore Ts'o .owner = THIS_MODULE, 882035e776STheodore Ts'o .name = "ext2", 892035e776STheodore Ts'o .mount = ext4_mount, 902035e776STheodore Ts'o .kill_sb = kill_block_super, 912035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 922035e776STheodore Ts'o }; 932035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 942035e776STheodore Ts'o #else 952035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 962035e776STheodore Ts'o #endif 972035e776STheodore Ts'o 982035e776STheodore Ts'o 99ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 100ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 101ba69f9abSJan Kara .owner = THIS_MODULE, 102ba69f9abSJan Kara .name = "ext3", 103152a0836SAl Viro .mount = ext4_mount, 104ba69f9abSJan Kara .kill_sb = kill_block_super, 105ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 106ba69f9abSJan Kara }; 107ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 108ba69f9abSJan Kara #else 109ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 110ba69f9abSJan Kara #endif 111bd81d8eeSLaurent Vivier 1128fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1138fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 114bd81d8eeSLaurent Vivier { 1153a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1168fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1178fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 118bd81d8eeSLaurent Vivier } 119bd81d8eeSLaurent Vivier 1208fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1218fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 122bd81d8eeSLaurent Vivier { 1235272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 1248fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1258fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 126bd81d8eeSLaurent Vivier } 127bd81d8eeSLaurent Vivier 1288fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 1298fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 130bd81d8eeSLaurent Vivier { 1315272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 1328fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1338fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 134bd81d8eeSLaurent Vivier } 135bd81d8eeSLaurent Vivier 136560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 137560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 138560671a0SAneesh Kumar K.V { 139560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 140560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 141560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 142560671a0SAneesh Kumar K.V } 143560671a0SAneesh Kumar K.V 144560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 145560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 146560671a0SAneesh Kumar K.V { 147560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 148560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 149560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 150560671a0SAneesh Kumar K.V } 151560671a0SAneesh Kumar K.V 152560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 153560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 154560671a0SAneesh Kumar K.V { 155560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 156560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 157560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 158560671a0SAneesh Kumar K.V } 159560671a0SAneesh Kumar K.V 160560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 161560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 162560671a0SAneesh Kumar K.V { 163560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 164560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 165560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 166560671a0SAneesh Kumar K.V } 167560671a0SAneesh Kumar K.V 1688fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1698fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 170bd81d8eeSLaurent Vivier { 1713a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1728fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1738fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 174bd81d8eeSLaurent Vivier } 175bd81d8eeSLaurent Vivier 1768fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1778fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 178bd81d8eeSLaurent Vivier { 1795272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1808fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1818fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 182bd81d8eeSLaurent Vivier } 183bd81d8eeSLaurent Vivier 1848fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1858fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 186bd81d8eeSLaurent Vivier { 1875272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1888fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1898fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 190bd81d8eeSLaurent Vivier } 191bd81d8eeSLaurent Vivier 192560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 193560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 194560671a0SAneesh Kumar K.V { 195560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 196560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 197560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 198560671a0SAneesh Kumar K.V } 199560671a0SAneesh Kumar K.V 200560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 201560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 202560671a0SAneesh Kumar K.V { 203560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 204560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 205560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 206560671a0SAneesh Kumar K.V } 207560671a0SAneesh Kumar K.V 208560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 209560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 210560671a0SAneesh Kumar K.V { 211560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 212560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 213560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 214560671a0SAneesh Kumar K.V } 215560671a0SAneesh Kumar K.V 216560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 217560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 218560671a0SAneesh Kumar K.V { 219560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 220560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 221560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 222560671a0SAneesh Kumar K.V } 223560671a0SAneesh Kumar K.V 224d3d1faf6SCurt Wohlgemuth 225d3d1faf6SCurt Wohlgemuth /* Just increment the non-pointer handle value */ 226d3d1faf6SCurt Wohlgemuth static handle_t *ext4_get_nojournal(void) 227d3d1faf6SCurt Wohlgemuth { 228d3d1faf6SCurt Wohlgemuth handle_t *handle = current->journal_info; 229d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 230d3d1faf6SCurt Wohlgemuth 231d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT); 232d3d1faf6SCurt Wohlgemuth 233d3d1faf6SCurt Wohlgemuth ref_cnt++; 234d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 235d3d1faf6SCurt Wohlgemuth 236d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 237d3d1faf6SCurt Wohlgemuth return handle; 238d3d1faf6SCurt Wohlgemuth } 239d3d1faf6SCurt Wohlgemuth 240d3d1faf6SCurt Wohlgemuth 241d3d1faf6SCurt Wohlgemuth /* Decrement the non-pointer handle value */ 242d3d1faf6SCurt Wohlgemuth static void ext4_put_nojournal(handle_t *handle) 243d3d1faf6SCurt Wohlgemuth { 244d3d1faf6SCurt Wohlgemuth unsigned long ref_cnt = (unsigned long)handle; 245d3d1faf6SCurt Wohlgemuth 246d3d1faf6SCurt Wohlgemuth BUG_ON(ref_cnt == 0); 247d3d1faf6SCurt Wohlgemuth 248d3d1faf6SCurt Wohlgemuth ref_cnt--; 249d3d1faf6SCurt Wohlgemuth handle = (handle_t *)ref_cnt; 250d3d1faf6SCurt Wohlgemuth 251d3d1faf6SCurt Wohlgemuth current->journal_info = handle; 252d3d1faf6SCurt Wohlgemuth } 253d3d1faf6SCurt Wohlgemuth 254ac27a0ecSDave Kleikamp /* 255dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 256ac27a0ecSDave Kleikamp * 257ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 258ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 259ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 260ac27a0ecSDave Kleikamp * appropriate. 261be4f27d3SYongqiang Yang * 262be4f27d3SYongqiang Yang * To avoid j_barrier hold in userspace when a user calls freeze(), 263be4f27d3SYongqiang Yang * ext4 prevents a new handle from being started by s_frozen, which 264be4f27d3SYongqiang Yang * is in an upper layer. 265ac27a0ecSDave Kleikamp */ 266617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 267ac27a0ecSDave Kleikamp { 268ac27a0ecSDave Kleikamp journal_t *journal; 269be4f27d3SYongqiang Yang handle_t *handle; 270ac27a0ecSDave Kleikamp 271ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 272ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 273ac27a0ecSDave Kleikamp 274617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 275be4f27d3SYongqiang Yang handle = ext4_journal_current_handle(); 276be4f27d3SYongqiang Yang 277be4f27d3SYongqiang Yang /* 278be4f27d3SYongqiang Yang * If a handle has been started, it should be allowed to 279be4f27d3SYongqiang Yang * finish, otherwise deadlock could happen between freeze 280be4f27d3SYongqiang Yang * and others(e.g. truncate) due to the restart of the 281be4f27d3SYongqiang Yang * journal handle if the filesystem is forzen and active 282be4f27d3SYongqiang Yang * handles are not stopped. 283be4f27d3SYongqiang Yang */ 284be4f27d3SYongqiang Yang if (!handle) 285be4f27d3SYongqiang Yang vfs_check_frozen(sb, SB_FREEZE_TRANS); 286be4f27d3SYongqiang Yang 287be4f27d3SYongqiang Yang if (!journal) 288be4f27d3SYongqiang Yang return ext4_get_nojournal(); 289be4f27d3SYongqiang Yang /* 290be4f27d3SYongqiang Yang * Special case here: if the journal has aborted behind our 291be4f27d3SYongqiang Yang * backs (eg. EIO in the commit thread), then we still need to 292be4f27d3SYongqiang Yang * take the FS itself readonly cleanly. 293be4f27d3SYongqiang Yang */ 294ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 295c67d859eSTheodore Ts'o ext4_abort(sb, "Detected aborted journal"); 296ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 297ac27a0ecSDave Kleikamp } 298dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 299ac27a0ecSDave Kleikamp } 300ac27a0ecSDave Kleikamp 301ac27a0ecSDave Kleikamp /* 302ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 303dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 304ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 305ac27a0ecSDave Kleikamp * appropriate. 306ac27a0ecSDave Kleikamp */ 307c398eda0STheodore Ts'o int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle) 308ac27a0ecSDave Kleikamp { 309ac27a0ecSDave Kleikamp struct super_block *sb; 310ac27a0ecSDave Kleikamp int err; 311ac27a0ecSDave Kleikamp int rc; 312ac27a0ecSDave Kleikamp 3130390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 314d3d1faf6SCurt Wohlgemuth ext4_put_nojournal(handle); 3150390131bSFrank Mayhar return 0; 3160390131bSFrank Mayhar } 317ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 318ac27a0ecSDave Kleikamp err = handle->h_err; 319dab291afSMingming Cao rc = jbd2_journal_stop(handle); 320ac27a0ecSDave Kleikamp 321ac27a0ecSDave Kleikamp if (!err) 322ac27a0ecSDave Kleikamp err = rc; 323ac27a0ecSDave Kleikamp if (err) 324c398eda0STheodore Ts'o __ext4_std_error(sb, where, line, err); 325ac27a0ecSDave Kleikamp return err; 326ac27a0ecSDave Kleikamp } 327ac27a0ecSDave Kleikamp 32890c7201bSTheodore Ts'o void ext4_journal_abort_handle(const char *caller, unsigned int line, 32990c7201bSTheodore Ts'o const char *err_fn, struct buffer_head *bh, 33090c7201bSTheodore Ts'o handle_t *handle, int err) 331ac27a0ecSDave Kleikamp { 332ac27a0ecSDave Kleikamp char nbuf[16]; 333617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 334ac27a0ecSDave Kleikamp 3350390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 3360390131bSFrank Mayhar 337ac27a0ecSDave Kleikamp if (bh) 338ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 339ac27a0ecSDave Kleikamp 340ac27a0ecSDave Kleikamp if (!handle->h_err) 341ac27a0ecSDave Kleikamp handle->h_err = err; 342ac27a0ecSDave Kleikamp 343ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 344ac27a0ecSDave Kleikamp return; 345ac27a0ecSDave Kleikamp 34690c7201bSTheodore Ts'o printk(KERN_ERR "%s:%d: aborting transaction: %s in %s\n", 34790c7201bSTheodore Ts'o caller, line, errstr, err_fn); 348ac27a0ecSDave Kleikamp 349dab291afSMingming Cao jbd2_journal_abort_handle(handle); 350ac27a0ecSDave Kleikamp } 351ac27a0ecSDave Kleikamp 3521c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3531c13d5c0STheodore Ts'o unsigned int line) 3541c13d5c0STheodore Ts'o { 3551c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3561c13d5c0STheodore Ts'o 3571c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3581c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3591c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3601c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3611c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3621c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3631c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3641c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3651c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3661c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3671c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3681c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3691c13d5c0STheodore Ts'o } 37066e61a9eSTheodore Ts'o /* 37166e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 37266e61a9eSTheodore Ts'o * started already 37366e61a9eSTheodore Ts'o */ 37466e61a9eSTheodore Ts'o if (!es->s_error_count) 37566e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 3761c13d5c0STheodore Ts'o es->s_error_count = cpu_to_le32(le32_to_cpu(es->s_error_count) + 1); 3771c13d5c0STheodore Ts'o } 3781c13d5c0STheodore Ts'o 3791c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3801c13d5c0STheodore Ts'o unsigned int line) 3811c13d5c0STheodore Ts'o { 3821c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3831c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3841c13d5c0STheodore Ts'o } 3851c13d5c0STheodore Ts'o 3861c13d5c0STheodore Ts'o 387ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 388ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 389ac27a0ecSDave Kleikamp * 390ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 391617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 392ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 393ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 394ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 395ac27a0ecSDave Kleikamp * write out the superblock safely. 396ac27a0ecSDave Kleikamp * 397dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 398d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 399ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 400ac27a0ecSDave Kleikamp */ 401ac27a0ecSDave Kleikamp 402617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 403ac27a0ecSDave Kleikamp { 404ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 405ac27a0ecSDave Kleikamp return; 406ac27a0ecSDave Kleikamp 407ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 408617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 409ac27a0ecSDave Kleikamp 4104ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 411ac27a0ecSDave Kleikamp if (journal) 412dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 413ac27a0ecSDave Kleikamp } 414ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 415b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 416ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 417ac27a0ecSDave Kleikamp } 418ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 419617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 420ac27a0ecSDave Kleikamp sb->s_id); 421ac27a0ecSDave Kleikamp } 422ac27a0ecSDave Kleikamp 42312062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 424c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 425ac27a0ecSDave Kleikamp { 4260ff2ea7dSJoe Perches struct va_format vaf; 427ac27a0ecSDave Kleikamp va_list args; 428ac27a0ecSDave Kleikamp 429ac27a0ecSDave Kleikamp va_start(args, fmt); 4300ff2ea7dSJoe Perches vaf.fmt = fmt; 4310ff2ea7dSJoe Perches vaf.va = &args; 4320ff2ea7dSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4330ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 434ac27a0ecSDave Kleikamp va_end(args); 435ac27a0ecSDave Kleikamp 436617ba13bSMingming Cao ext4_handle_error(sb); 437ac27a0ecSDave Kleikamp } 438ac27a0ecSDave Kleikamp 439c398eda0STheodore Ts'o void ext4_error_inode(struct inode *inode, const char *function, 440c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 441273df556SFrank Mayhar 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 = EXT4_SB(inode->i_sb)->s_es; 446273df556SFrank Mayhar 4471c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4481c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 4491c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 450273df556SFrank Mayhar va_start(args, fmt); 451f7c21177STheodore Ts'o vaf.fmt = fmt; 452f7c21177STheodore Ts'o vaf.va = &args; 453c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 454c398eda0STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 455c398eda0STheodore Ts'o if (block) 456f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 457f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: %pV\n", current->comm, &vaf); 458273df556SFrank Mayhar va_end(args); 459273df556SFrank Mayhar 460273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 461273df556SFrank Mayhar } 462273df556SFrank Mayhar 463c398eda0STheodore Ts'o void ext4_error_file(struct file *file, const char *function, 464f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 465f7c21177STheodore Ts'o const char *fmt, ...) 466273df556SFrank Mayhar { 467273df556SFrank Mayhar va_list args; 468f7c21177STheodore Ts'o struct va_format vaf; 4691c13d5c0STheodore Ts'o struct ext4_super_block *es; 470273df556SFrank Mayhar struct inode *inode = file->f_dentry->d_inode; 471273df556SFrank Mayhar char pathname[80], *path; 472273df556SFrank Mayhar 4731c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4741c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4751c13d5c0STheodore Ts'o save_error_info(inode->i_sb, function, line); 476273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 477f9a62d09SDan Carpenter if (IS_ERR(path)) 478273df556SFrank Mayhar path = "(unknown)"; 479273df556SFrank Mayhar printk(KERN_CRIT 480f7c21177STheodore Ts'o "EXT4-fs error (device %s): %s:%d: inode #%lu: ", 481f7c21177STheodore Ts'o inode->i_sb->s_id, function, line, inode->i_ino); 482f7c21177STheodore Ts'o if (block) 483f7c21177STheodore Ts'o printk(KERN_CONT "block %llu: ", block); 484f7c21177STheodore Ts'o va_start(args, fmt); 485f7c21177STheodore Ts'o vaf.fmt = fmt; 486f7c21177STheodore Ts'o vaf.va = &args; 487f7c21177STheodore Ts'o printk(KERN_CONT "comm %s: path %s: %pV\n", current->comm, path, &vaf); 488273df556SFrank Mayhar va_end(args); 489273df556SFrank Mayhar 490273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 491273df556SFrank Mayhar } 492273df556SFrank Mayhar 493617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 494ac27a0ecSDave Kleikamp char nbuf[16]) 495ac27a0ecSDave Kleikamp { 496ac27a0ecSDave Kleikamp char *errstr = NULL; 497ac27a0ecSDave Kleikamp 498ac27a0ecSDave Kleikamp switch (errno) { 499ac27a0ecSDave Kleikamp case -EIO: 500ac27a0ecSDave Kleikamp errstr = "IO failure"; 501ac27a0ecSDave Kleikamp break; 502ac27a0ecSDave Kleikamp case -ENOMEM: 503ac27a0ecSDave Kleikamp errstr = "Out of memory"; 504ac27a0ecSDave Kleikamp break; 505ac27a0ecSDave Kleikamp case -EROFS: 50678f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 50778f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 508ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 509ac27a0ecSDave Kleikamp else 510ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 511ac27a0ecSDave Kleikamp break; 512ac27a0ecSDave Kleikamp default: 513ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 514ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 515ac27a0ecSDave Kleikamp * NULL. */ 516ac27a0ecSDave Kleikamp if (nbuf) { 517ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 518ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 519ac27a0ecSDave Kleikamp errstr = nbuf; 520ac27a0ecSDave Kleikamp } 521ac27a0ecSDave Kleikamp break; 522ac27a0ecSDave Kleikamp } 523ac27a0ecSDave Kleikamp 524ac27a0ecSDave Kleikamp return errstr; 525ac27a0ecSDave Kleikamp } 526ac27a0ecSDave Kleikamp 527617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 528ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 529ac27a0ecSDave Kleikamp 530c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 531c398eda0STheodore Ts'o unsigned int line, int errno) 532ac27a0ecSDave Kleikamp { 533ac27a0ecSDave Kleikamp char nbuf[16]; 534ac27a0ecSDave Kleikamp const char *errstr; 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 537ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 538ac27a0ecSDave Kleikamp * an error. */ 539ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 540ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 541ac27a0ecSDave Kleikamp return; 542ac27a0ecSDave Kleikamp 543617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 544c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 545c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 5461c13d5c0STheodore Ts'o save_error_info(sb, function, line); 547ac27a0ecSDave Kleikamp 548617ba13bSMingming Cao ext4_handle_error(sb); 549ac27a0ecSDave Kleikamp } 550ac27a0ecSDave Kleikamp 551ac27a0ecSDave Kleikamp /* 552617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 553ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 554ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 555ac27a0ecSDave Kleikamp * 556ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 557ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 558ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 559ac27a0ecSDave Kleikamp */ 560ac27a0ecSDave Kleikamp 561c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 562c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 563ac27a0ecSDave Kleikamp { 564ac27a0ecSDave Kleikamp va_list args; 565ac27a0ecSDave Kleikamp 5661c13d5c0STheodore Ts'o save_error_info(sb, function, line); 567ac27a0ecSDave Kleikamp va_start(args, fmt); 568c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 569c398eda0STheodore Ts'o function, line); 570ac27a0ecSDave Kleikamp vprintk(fmt, args); 571ac27a0ecSDave Kleikamp printk("\n"); 572ac27a0ecSDave Kleikamp va_end(args); 573ac27a0ecSDave Kleikamp 5741c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 575b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 576ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 5774ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 578ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 579dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5801c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5811c13d5c0STheodore Ts'o } 5821c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 5831c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 584ac27a0ecSDave Kleikamp } 585ac27a0ecSDave Kleikamp 5860ff2ea7dSJoe Perches void ext4_msg(struct super_block *sb, const char *prefix, const char *fmt, ...) 587b31e1552SEric Sandeen { 5880ff2ea7dSJoe Perches struct va_format vaf; 589b31e1552SEric Sandeen va_list args; 590b31e1552SEric Sandeen 591b31e1552SEric Sandeen va_start(args, fmt); 5920ff2ea7dSJoe Perches vaf.fmt = fmt; 5930ff2ea7dSJoe Perches vaf.va = &args; 5940ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 595b31e1552SEric Sandeen va_end(args); 596b31e1552SEric Sandeen } 597b31e1552SEric Sandeen 59812062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 599c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 600ac27a0ecSDave Kleikamp { 6010ff2ea7dSJoe Perches struct va_format vaf; 602ac27a0ecSDave Kleikamp va_list args; 603ac27a0ecSDave Kleikamp 604ac27a0ecSDave Kleikamp va_start(args, fmt); 6050ff2ea7dSJoe Perches vaf.fmt = fmt; 6060ff2ea7dSJoe Perches vaf.va = &args; 6070ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6080ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 609ac27a0ecSDave Kleikamp va_end(args); 610ac27a0ecSDave Kleikamp } 611ac27a0ecSDave Kleikamp 612e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 613e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 614e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 615e29136f8STheodore Ts'o const char *fmt, ...) 6165d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6175d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6185d1b1b3fSAneesh Kumar K.V { 6190ff2ea7dSJoe Perches struct va_format vaf; 6205d1b1b3fSAneesh Kumar K.V va_list args; 6215d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6225d1b1b3fSAneesh Kumar K.V 6231c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6241c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6251c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6260ff2ea7dSJoe Perches 6275d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6280ff2ea7dSJoe Perches 6290ff2ea7dSJoe Perches vaf.fmt = fmt; 6300ff2ea7dSJoe Perches vaf.va = &args; 63121149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 632e29136f8STheodore Ts'o sb->s_id, function, line, grp); 633e29136f8STheodore Ts'o if (ino) 6340ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 635e29136f8STheodore Ts'o if (block) 6360ff2ea7dSJoe Perches printk(KERN_CONT "block %llu:", (unsigned long long) block); 6370ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6385d1b1b3fSAneesh Kumar K.V va_end(args); 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 */ 709617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 710ac27a0ecSDave Kleikamp { 711e525fd89STejun Heo return blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 712ac27a0ecSDave Kleikamp } 713ac27a0ecSDave Kleikamp 714617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 715ac27a0ecSDave Kleikamp { 716ac27a0ecSDave Kleikamp struct block_device *bdev; 717ac27a0ecSDave Kleikamp int ret = -ENODEV; 718ac27a0ecSDave Kleikamp 719ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 720ac27a0ecSDave Kleikamp if (bdev) { 721617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 722ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 723ac27a0ecSDave Kleikamp } 724ac27a0ecSDave Kleikamp return ret; 725ac27a0ecSDave Kleikamp } 726ac27a0ecSDave Kleikamp 727ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 728ac27a0ecSDave Kleikamp { 729617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 730ac27a0ecSDave Kleikamp } 731ac27a0ecSDave Kleikamp 732617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 733ac27a0ecSDave Kleikamp { 734ac27a0ecSDave Kleikamp struct list_head *l; 735ac27a0ecSDave Kleikamp 736b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 737ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 738ac27a0ecSDave Kleikamp 739ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 740ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 741ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 742ac27a0ecSDave Kleikamp printk(KERN_ERR " " 743ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 744ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 745ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 746ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 747ac27a0ecSDave Kleikamp } 748ac27a0ecSDave Kleikamp } 749ac27a0ecSDave Kleikamp 750617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 751ac27a0ecSDave Kleikamp { 752617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 753617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 754ef2cabf7SHidehiro Kawai int i, err; 755ac27a0ecSDave Kleikamp 756857ac889SLukas Czerner ext4_unregister_li_request(sb); 757e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 758e0ccfd95SChristoph Hellwig 7594c0425ffSMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 7604c0425ffSMingming Cao destroy_workqueue(sbi->dio_unwritten_wq); 7614c0425ffSMingming Cao 762a9e220f8SAl Viro lock_super(sb); 7638c85e125SChristoph Hellwig if (sb->s_dirt) 764ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 7658c85e125SChristoph Hellwig 7660390131bSFrank Mayhar if (sbi->s_journal) { 767ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 76847b4a50bSJan Kara sbi->s_journal = NULL; 769ef2cabf7SHidehiro Kawai if (err < 0) 770c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7710390131bSFrank Mayhar } 772d4edac31SJosef Bacik 773a1c6c569SSergey Senozhatsky del_timer(&sbi->s_err_report); 774d4edac31SJosef Bacik ext4_release_system_zone(sb); 775d4edac31SJosef Bacik ext4_mb_release(sb); 776d4edac31SJosef Bacik ext4_ext_release(sb); 777d4edac31SJosef Bacik ext4_xattr_put_super(sb); 778d4edac31SJosef Bacik 779ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 780617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 781ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 782e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 783ac27a0ecSDave Kleikamp } 784240799cdSTheodore Ts'o if (sbi->s_proc) { 7859f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 786240799cdSTheodore Ts'o } 7873197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 788ac27a0ecSDave Kleikamp 789ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 790ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 791ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 792c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 793c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 794c5ca7c76STheodore Ts'o else 795772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 796ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 797ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 798ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 7996bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 800ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 801ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 802ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 803ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 804ac27a0ecSDave Kleikamp #endif 805ac27a0ecSDave Kleikamp 806ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 807ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 808ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 809ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 810ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 811ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 812ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 813ac27a0ecSDave Kleikamp 814f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 815ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 816ac27a0ecSDave Kleikamp /* 817ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 818ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 819ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 820ac27a0ecSDave Kleikamp */ 821ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 822f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 823617ba13bSMingming Cao ext4_blkdev_remove(sbi); 824ac27a0ecSDave Kleikamp } 825*c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 826*c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 827ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8283197ebdbSTheodore Ts'o /* 8293197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8303197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8313197ebdbSTheodore Ts'o */ 8323197ebdbSTheodore Ts'o unlock_super(sb); 8333197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8343197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 835705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 836ac27a0ecSDave Kleikamp kfree(sbi); 837ac27a0ecSDave Kleikamp } 838ac27a0ecSDave Kleikamp 839e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 840ac27a0ecSDave Kleikamp 841ac27a0ecSDave Kleikamp /* 842ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 843ac27a0ecSDave Kleikamp */ 844617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 845ac27a0ecSDave Kleikamp { 846617ba13bSMingming Cao struct ext4_inode_info *ei; 847ac27a0ecSDave Kleikamp 848e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 849ac27a0ecSDave Kleikamp if (!ei) 850ac27a0ecSDave Kleikamp return NULL; 8510b8e58a1SAndreas Dilger 852ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 85391246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 854a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 855c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 856c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 857d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 858d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 859d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8609d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 861d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 862a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 863a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 864a9e7f447SDmitry Monakhov #endif 8658aefcd55STheodore Ts'o ei->jinode = NULL; 866c7064ef1SJiaying Zhang INIT_LIST_HEAD(&ei->i_completed_io_list); 867744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 8688d5d02e6SMingming Cao ei->cur_aio_dio = NULL; 869b436b9beSJan Kara ei->i_sync_tid = 0; 870b436b9beSJan Kara ei->i_datasync_tid = 0; 871f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 872e9e3bcecSEric Sandeen atomic_set(&ei->i_aiodio_unwritten, 0); 8730b8e58a1SAndreas Dilger 874ac27a0ecSDave Kleikamp return &ei->vfs_inode; 875ac27a0ecSDave Kleikamp } 876ac27a0ecSDave Kleikamp 8777ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 8787ff9c073STheodore Ts'o { 8797ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 8807ff9c073STheodore Ts'o 8817ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 8827ff9c073STheodore Ts'o return drop; 8837ff9c073STheodore Ts'o } 8847ff9c073STheodore Ts'o 885fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 886fa0d7e3dSNick Piggin { 887fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 888fa0d7e3dSNick Piggin INIT_LIST_HEAD(&inode->i_dentry); 889fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 890fa0d7e3dSNick Piggin } 891fa0d7e3dSNick Piggin 892617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 893ac27a0ecSDave Kleikamp { 894f7ad6d2eSTheodore Ts'o ext4_ioend_wait(inode); 8959f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 896b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 897b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 898b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 8999f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9009f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9019f7dd93dSVasily Averin true); 9029f7dd93dSVasily Averin dump_stack(); 9039f7dd93dSVasily Averin } 904fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 905ac27a0ecSDave Kleikamp } 906ac27a0ecSDave Kleikamp 90751cc5068SAlexey Dobriyan static void init_once(void *foo) 908ac27a0ecSDave Kleikamp { 909617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 910ac27a0ecSDave Kleikamp 911ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 91203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 913ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 914ac27a0ecSDave Kleikamp #endif 9150e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 916ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 917ac27a0ecSDave Kleikamp } 918ac27a0ecSDave Kleikamp 919ac27a0ecSDave Kleikamp static int init_inodecache(void) 920ac27a0ecSDave Kleikamp { 921617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 922617ba13bSMingming Cao sizeof(struct ext4_inode_info), 923ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 924ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 92520c2df83SPaul Mundt init_once); 926617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 927ac27a0ecSDave Kleikamp return -ENOMEM; 928ac27a0ecSDave Kleikamp return 0; 929ac27a0ecSDave Kleikamp } 930ac27a0ecSDave Kleikamp 931ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 932ac27a0ecSDave Kleikamp { 933617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 934ac27a0ecSDave Kleikamp } 935ac27a0ecSDave Kleikamp 9360930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 937ac27a0ecSDave Kleikamp { 9380930fcc1SAl Viro invalidate_inode_buffers(inode); 9390930fcc1SAl Viro end_writeback(inode); 9409f754758SChristoph Hellwig dquot_drop(inode); 941c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 9428aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9438aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9448aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9458aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9468aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9478aefcd55STheodore Ts'o } 948ac27a0ecSDave Kleikamp } 949ac27a0ecSDave Kleikamp 9502b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 9512b2d6d01STheodore Ts'o struct super_block *sb) 952ac27a0ecSDave Kleikamp { 953ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 954617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 955ac27a0ecSDave Kleikamp 9565a20bdfcSJan Kara if (sbi->s_jquota_fmt) { 9575a20bdfcSJan Kara char *fmtname = ""; 9585a20bdfcSJan Kara 9595a20bdfcSJan Kara switch (sbi->s_jquota_fmt) { 9605a20bdfcSJan Kara case QFMT_VFS_OLD: 9615a20bdfcSJan Kara fmtname = "vfsold"; 9625a20bdfcSJan Kara break; 9635a20bdfcSJan Kara case QFMT_VFS_V0: 9645a20bdfcSJan Kara fmtname = "vfsv0"; 9655a20bdfcSJan Kara break; 9665a20bdfcSJan Kara case QFMT_VFS_V1: 9675a20bdfcSJan Kara fmtname = "vfsv1"; 9685a20bdfcSJan Kara break; 9695a20bdfcSJan Kara } 9705a20bdfcSJan Kara seq_printf(seq, ",jqfmt=%s", fmtname); 9715a20bdfcSJan Kara } 972ac27a0ecSDave Kleikamp 973ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 974ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 975ac27a0ecSDave Kleikamp 976ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 977ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 978ac27a0ecSDave Kleikamp 979482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA)) 980ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 981ac27a0ecSDave Kleikamp 982482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA)) 983ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 984ac27a0ecSDave Kleikamp #endif 985ac27a0ecSDave Kleikamp } 986ac27a0ecSDave Kleikamp 987d9c9bef1SMiklos Szeredi /* 988d9c9bef1SMiklos Szeredi * Show an option if 989d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 990d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 991d9c9bef1SMiklos Szeredi */ 992617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 993ac27a0ecSDave Kleikamp { 994aa22df2cSAneesh Kumar K.V int def_errors; 995aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 996ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 997d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 998d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 999d9c9bef1SMiklos Szeredi 1000d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1001aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 1002d9c9bef1SMiklos Szeredi 1003d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 1004d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 1005d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 1006d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 1007aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 1008d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 1009d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 1010d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 1011d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 1012d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 1013d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 1014d9c9bef1SMiklos Szeredi } 1015d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 1016d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 1017d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 1018d9c9bef1SMiklos Szeredi } 1019bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 1020d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 1021bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 1022d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 1023bb4f397aSAneesh Kumar K.V } 1024bb4f397aSAneesh Kumar K.V } 1025aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 1026bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 1027aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 1028d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 1029aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 1030d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 1031aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 1032d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 1033d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 1034d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 103503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1036ea663336SEric Sandeen if (test_opt(sb, XATTR_USER)) 1037d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 1038ea663336SEric Sandeen if (!test_opt(sb, XATTR_USER)) 1039d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 1040d9c9bef1SMiklos Szeredi #endif 104103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1042aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 1043d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 1044d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 1045d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 1046d9c9bef1SMiklos Szeredi #endif 104730773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 1048d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 1049d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 1050d9c9bef1SMiklos Szeredi } 105130773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 105230773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 105330773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 105430773840STheodore Ts'o } 105530773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 105630773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 105730773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 105830773840STheodore Ts'o } 105930773840STheodore Ts'o 1060571640caSEric Sandeen /* 1061571640caSEric Sandeen * We're changing the default of barrier mount option, so 1062571640caSEric Sandeen * let's always display its mount state so it's clear what its 1063571640caSEric Sandeen * status is. 1064571640caSEric Sandeen */ 1065571640caSEric Sandeen seq_puts(seq, ",barrier="); 1066571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 1067cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 1068cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 106939a4badeSJan Kara else if (test_opt(sb, JOURNAL_CHECKSUM)) 107039a4badeSJan Kara seq_puts(seq, ",journal_checksum"); 107125ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 107225ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 10738b67f04aSTheodore Ts'o if (!test_opt(sb, DELALLOC) && 10748b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_NODELALLOC)) 1075dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 1076dd919b98SAneesh Kumar K.V 10776fd7a467STheodore Ts'o if (!test_opt(sb, MBLK_IO_SUBMIT)) 10786fd7a467STheodore Ts'o seq_puts(seq, ",nomblk_io_submit"); 1079cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 1080cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 1081aa22df2cSAneesh Kumar K.V /* 1082aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 1083aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 1084aa22df2cSAneesh Kumar K.V */ 1085617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 1086ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 1087617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 1088ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 1089617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 1090ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 1091ac27a0ecSDave Kleikamp 1092240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 1093240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 1094240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 1095240799cdSTheodore Ts'o 10965bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 10975bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 10985bf5683aSHidehiro Kawai 1099afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 110006705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 1101afd4672dSTheodore Ts'o 11028b67f04aSTheodore Ts'o if (test_opt(sb, DISCARD) && !(def_mount_opts & EXT4_DEFM_DISCARD)) 11035328e635SEric Sandeen seq_puts(seq, ",discard"); 11045328e635SEric Sandeen 1105e3bb52aeSEric Sandeen if (test_opt(sb, NOLOAD)) 1106e3bb52aeSEric Sandeen seq_puts(seq, ",norecovery"); 1107e3bb52aeSEric Sandeen 1108744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) 1109744692dcSJiaying Zhang seq_puts(seq, ",dioread_nolock"); 1110744692dcSJiaying Zhang 11118b67f04aSTheodore Ts'o if (test_opt(sb, BLOCK_VALIDITY) && 11128b67f04aSTheodore Ts'o !(def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY)) 11138b67f04aSTheodore Ts'o seq_puts(seq, ",block_validity"); 11148b67f04aSTheodore Ts'o 1115bfff6873SLukas Czerner if (!test_opt(sb, INIT_INODE_TABLE)) 1116bfff6873SLukas Czerner seq_puts(seq, ",noinit_inode_table"); 111751ce6511SLukas Czerner else if (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT) 1118bfff6873SLukas Czerner seq_printf(seq, ",init_inode_table=%u", 1119bfff6873SLukas Czerner (unsigned) sbi->s_li_wait_mult); 1120bfff6873SLukas Czerner 1121617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 11220b8e58a1SAndreas Dilger 1123ac27a0ecSDave Kleikamp return 0; 1124ac27a0ecSDave Kleikamp } 1125ac27a0ecSDave Kleikamp 11261b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 11271b961ac0SChristoph Hellwig u64 ino, u32 generation) 1128ac27a0ecSDave Kleikamp { 1129ac27a0ecSDave Kleikamp struct inode *inode; 1130ac27a0ecSDave Kleikamp 1131617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 1132ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1133617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 1134ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1135ac27a0ecSDave Kleikamp 1136ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 1137ac27a0ecSDave Kleikamp * 1138617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 1139ac27a0ecSDave Kleikamp * deleted, so we should be safe. 1140ac27a0ecSDave Kleikamp * 1141ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 1142ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 1143ac27a0ecSDave Kleikamp */ 11441d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 11451d1fe1eeSDavid Howells if (IS_ERR(inode)) 11461d1fe1eeSDavid Howells return ERR_CAST(inode); 11471d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1148ac27a0ecSDave Kleikamp iput(inode); 1149ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1150ac27a0ecSDave Kleikamp } 11511b961ac0SChristoph Hellwig 11521b961ac0SChristoph Hellwig return inode; 1153ac27a0ecSDave Kleikamp } 11541b961ac0SChristoph Hellwig 11551b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 11561b961ac0SChristoph Hellwig int fh_len, int fh_type) 11571b961ac0SChristoph Hellwig { 11581b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 11591b961ac0SChristoph Hellwig ext4_nfs_get_inode); 11601b961ac0SChristoph Hellwig } 11611b961ac0SChristoph Hellwig 11621b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 11631b961ac0SChristoph Hellwig int fh_len, int fh_type) 11641b961ac0SChristoph Hellwig { 11651b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 11661b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1167ac27a0ecSDave Kleikamp } 1168ac27a0ecSDave Kleikamp 1169c39a7f84SToshiyuki Okajima /* 1170c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1171c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1172c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1173c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1174c39a7f84SToshiyuki Okajima */ 11750b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 11760b8e58a1SAndreas Dilger gfp_t wait) 1177c39a7f84SToshiyuki Okajima { 1178c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1179c39a7f84SToshiyuki Okajima 1180c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1181c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1182c39a7f84SToshiyuki Okajima return 0; 1183c39a7f84SToshiyuki Okajima if (journal) 1184c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1185c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1186c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1187c39a7f84SToshiyuki Okajima } 1188c39a7f84SToshiyuki Okajima 1189ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1190ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1191ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1192ac27a0ecSDave Kleikamp 1193617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1194617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1195617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1196617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1197617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 11986f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1199f00c9e44SJan Kara struct path *path); 1200ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 1201617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1202617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1203ac27a0ecSDave Kleikamp size_t len, loff_t off); 1204617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1205ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 1206ac27a0ecSDave Kleikamp 120761e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 120860e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1209617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1210617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1211617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1212617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1213a5b5ee32SJan Kara .write_info = ext4_write_info, 1214a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1215a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1216ac27a0ecSDave Kleikamp }; 1217ac27a0ecSDave Kleikamp 12180d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1219617ba13bSMingming Cao .quota_on = ext4_quota_on, 1220ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1221287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1222287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1223287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1224287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1225287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1226ac27a0ecSDave Kleikamp }; 1227ac27a0ecSDave Kleikamp #endif 1228ac27a0ecSDave Kleikamp 1229ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1230617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1231617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1232617ba13bSMingming Cao .write_inode = ext4_write_inode, 1233617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 12347ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12350930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1236617ba13bSMingming Cao .put_super = ext4_put_super, 1237617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1238c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1239c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1240617ba13bSMingming Cao .statfs = ext4_statfs, 1241617ba13bSMingming Cao .remount_fs = ext4_remount, 1242617ba13bSMingming Cao .show_options = ext4_show_options, 1243ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1244617ba13bSMingming Cao .quota_read = ext4_quota_read, 1245617ba13bSMingming Cao .quota_write = ext4_quota_write, 1246ac27a0ecSDave Kleikamp #endif 1247c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1248ac27a0ecSDave Kleikamp }; 1249ac27a0ecSDave Kleikamp 12509ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 12519ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 12529ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 12539ca92389STheodore Ts'o .write_inode = ext4_write_inode, 12549ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 12557ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 12560930fcc1SAl Viro .evict_inode = ext4_evict_inode, 12579ca92389STheodore Ts'o .write_super = ext4_write_super, 12589ca92389STheodore Ts'o .put_super = ext4_put_super, 12599ca92389STheodore Ts'o .statfs = ext4_statfs, 12609ca92389STheodore Ts'o .remount_fs = ext4_remount, 12619ca92389STheodore Ts'o .show_options = ext4_show_options, 12629ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 12639ca92389STheodore Ts'o .quota_read = ext4_quota_read, 12649ca92389STheodore Ts'o .quota_write = ext4_quota_write, 12659ca92389STheodore Ts'o #endif 12669ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 12679ca92389STheodore Ts'o }; 12689ca92389STheodore Ts'o 126939655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 12701b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 12711b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1272617ba13bSMingming Cao .get_parent = ext4_get_parent, 1273ac27a0ecSDave Kleikamp }; 1274ac27a0ecSDave Kleikamp 1275ac27a0ecSDave Kleikamp enum { 1276ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1277ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 127801436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1279ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 128006705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 128130773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1282c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1283818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1284ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1285296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1286ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 12875a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 12885a20bdfcSJan Kara Opt_noquota, Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, 12895a20bdfcSJan Kara Opt_resize, Opt_usrquota, Opt_grpquota, Opt_i_version, 12901449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 12911449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 12925328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1293744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 12945328e635SEric Sandeen Opt_discard, Opt_nodiscard, 1295bfff6873SLukas Czerner Opt_init_inode_table, Opt_noinit_inode_table, 1296ac27a0ecSDave Kleikamp }; 1297ac27a0ecSDave Kleikamp 1298a447c093SSteven Whitehouse static const match_table_t tokens = { 1299ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1300ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1301ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1302ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1303ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1304ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1305ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1306ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1307ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1308ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1309ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1310ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1311ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1312ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1313ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1314ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1315ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1316ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1317ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1318ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1319ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1320e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 1321ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1322ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1323ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 132430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 132530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1326ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1327ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1328818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1329818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1330ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1331ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1332ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1333ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 13345bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 13355bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1336ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1337ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1338ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1339ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1340ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1341ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 13425a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1343ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1344ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1345ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1346ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1347ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 134806705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 134906705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 135025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1351c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1352ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 135364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1354dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 13551449032bSTheodore Ts'o {Opt_mblk_io_submit, "mblk_io_submit"}, 13561449032bSTheodore Ts'o {Opt_nomblk_io_submit, "nomblk_io_submit"}, 13576fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 13586fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1359240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1360b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1361afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 136206705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 136306705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1364744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1365744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 13665328e635SEric Sandeen {Opt_discard, "discard"}, 13675328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1368bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable=%u"}, 1369bfff6873SLukas Czerner {Opt_init_inode_table, "init_itable"}, 1370bfff6873SLukas Czerner {Opt_noinit_inode_table, "noinit_itable"}, 1371f3f12faaSJosef Bacik {Opt_err, NULL}, 1372ac27a0ecSDave Kleikamp }; 1373ac27a0ecSDave Kleikamp 1374617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1375ac27a0ecSDave Kleikamp { 1376617ba13bSMingming Cao ext4_fsblk_t sb_block; 1377ac27a0ecSDave Kleikamp char *options = (char *) *data; 1378ac27a0ecSDave Kleikamp 1379ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1380ac27a0ecSDave Kleikamp return 1; /* Default location */ 13810b8e58a1SAndreas Dilger 1382ac27a0ecSDave Kleikamp options += 3; 13830b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1384ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1385ac27a0ecSDave Kleikamp if (*options && *options != ',') { 13864776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1387ac27a0ecSDave Kleikamp (char *) *data); 1388ac27a0ecSDave Kleikamp return 1; 1389ac27a0ecSDave Kleikamp } 1390ac27a0ecSDave Kleikamp if (*options == ',') 1391ac27a0ecSDave Kleikamp options++; 1392ac27a0ecSDave Kleikamp *data = (void *) options; 13930b8e58a1SAndreas Dilger 1394ac27a0ecSDave Kleikamp return sb_block; 1395ac27a0ecSDave Kleikamp } 1396ac27a0ecSDave Kleikamp 1397b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1398437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1399437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1400b3881f74STheodore Ts'o 140156c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 140256c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 140356c50f11SDmitry Monakhov { 140456c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 140556c50f11SDmitry Monakhov char *qname; 140656c50f11SDmitry Monakhov 140756c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 140856c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 140956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 141056c50f11SDmitry Monakhov "Cannot change journaled " 141156c50f11SDmitry Monakhov "quota options when quota turned on"); 141256c50f11SDmitry Monakhov return 0; 141356c50f11SDmitry Monakhov } 141456c50f11SDmitry Monakhov qname = match_strdup(args); 141556c50f11SDmitry Monakhov if (!qname) { 141656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 141756c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 141856c50f11SDmitry Monakhov return 0; 141956c50f11SDmitry Monakhov } 142056c50f11SDmitry Monakhov if (sbi->s_qf_names[qtype] && 142156c50f11SDmitry Monakhov strcmp(sbi->s_qf_names[qtype], qname)) { 142256c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 142356c50f11SDmitry Monakhov "%s quota file already specified", QTYPE2NAME(qtype)); 142456c50f11SDmitry Monakhov kfree(qname); 142556c50f11SDmitry Monakhov return 0; 142656c50f11SDmitry Monakhov } 142756c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = qname; 142856c50f11SDmitry Monakhov if (strchr(sbi->s_qf_names[qtype], '/')) { 142956c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 143056c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 143156c50f11SDmitry Monakhov kfree(sbi->s_qf_names[qtype]); 143256c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 143356c50f11SDmitry Monakhov return 0; 143456c50f11SDmitry Monakhov } 1435fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 143656c50f11SDmitry Monakhov return 1; 143756c50f11SDmitry Monakhov } 143856c50f11SDmitry Monakhov 143956c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 144056c50f11SDmitry Monakhov { 144156c50f11SDmitry Monakhov 144256c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 144356c50f11SDmitry Monakhov 144456c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 144556c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 144656c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 144756c50f11SDmitry Monakhov " when quota turned on"); 144856c50f11SDmitry Monakhov return 0; 144956c50f11SDmitry Monakhov } 145056c50f11SDmitry Monakhov /* 145156c50f11SDmitry Monakhov * The space will be released later when all options are confirmed 145256c50f11SDmitry Monakhov * to be correct 145356c50f11SDmitry Monakhov */ 145456c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 145556c50f11SDmitry Monakhov return 1; 145656c50f11SDmitry Monakhov } 145756c50f11SDmitry Monakhov #endif 145856c50f11SDmitry Monakhov 1459ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1460c3191067STheodore Ts'o unsigned long *journal_devnum, 1461b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1462617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1463ac27a0ecSDave Kleikamp { 1464617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1465ac27a0ecSDave Kleikamp char *p; 1466ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1467ac27a0ecSDave Kleikamp int data_opt = 0; 1468ac27a0ecSDave Kleikamp int option; 1469ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 147056c50f11SDmitry Monakhov int qfmt; 1471ac27a0ecSDave Kleikamp #endif 1472ac27a0ecSDave Kleikamp 1473ac27a0ecSDave Kleikamp if (!options) 1474ac27a0ecSDave Kleikamp return 1; 1475ac27a0ecSDave Kleikamp 1476ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1477ac27a0ecSDave Kleikamp int token; 1478ac27a0ecSDave Kleikamp if (!*p) 1479ac27a0ecSDave Kleikamp continue; 1480ac27a0ecSDave Kleikamp 148115121c18SEric Sandeen /* 148215121c18SEric Sandeen * Initialize args struct so we know whether arg was 148315121c18SEric Sandeen * found; some options take optional arguments. 148415121c18SEric Sandeen */ 14857dc57615SPeter Huewe args[0].to = args[0].from = NULL; 1486ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1487ac27a0ecSDave Kleikamp switch (token) { 1488ac27a0ecSDave Kleikamp case Opt_bsd_df: 1489437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1490fd8c37ecSTheodore Ts'o clear_opt(sb, MINIX_DF); 1491ac27a0ecSDave Kleikamp break; 1492ac27a0ecSDave Kleikamp case Opt_minix_df: 1493437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1494fd8c37ecSTheodore Ts'o set_opt(sb, MINIX_DF); 1495437ca0fdSDmitry Monakhov 1496ac27a0ecSDave Kleikamp break; 1497ac27a0ecSDave Kleikamp case Opt_grpid: 1498437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1499fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 1500437ca0fdSDmitry Monakhov 1501ac27a0ecSDave Kleikamp break; 1502ac27a0ecSDave Kleikamp case Opt_nogrpid: 1503437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, p, "2.6.38"); 1504fd8c37ecSTheodore Ts'o clear_opt(sb, GRPID); 1505437ca0fdSDmitry Monakhov 1506ac27a0ecSDave Kleikamp break; 1507ac27a0ecSDave Kleikamp case Opt_resuid: 1508ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1509ac27a0ecSDave Kleikamp return 0; 1510ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1511ac27a0ecSDave Kleikamp break; 1512ac27a0ecSDave Kleikamp case Opt_resgid: 1513ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1514ac27a0ecSDave Kleikamp return 0; 1515ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1516ac27a0ecSDave Kleikamp break; 1517ac27a0ecSDave Kleikamp case Opt_sb: 1518ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1519ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1520ac27a0ecSDave Kleikamp break; 1521ac27a0ecSDave Kleikamp case Opt_err_panic: 1522fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1523fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1524fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 1525ac27a0ecSDave Kleikamp break; 1526ac27a0ecSDave Kleikamp case Opt_err_ro: 1527fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_CONT); 1528fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1529fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 1530ac27a0ecSDave Kleikamp break; 1531ac27a0ecSDave Kleikamp case Opt_err_cont: 1532fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_RO); 1533fd8c37ecSTheodore Ts'o clear_opt(sb, ERRORS_PANIC); 1534fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 1535ac27a0ecSDave Kleikamp break; 1536ac27a0ecSDave Kleikamp case Opt_nouid32: 1537fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 1538ac27a0ecSDave Kleikamp break; 1539ac27a0ecSDave Kleikamp case Opt_debug: 1540fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 1541ac27a0ecSDave Kleikamp break; 1542ac27a0ecSDave Kleikamp case Opt_oldalloc: 1543fd8c37ecSTheodore Ts'o set_opt(sb, OLDALLOC); 1544ac27a0ecSDave Kleikamp break; 1545ac27a0ecSDave Kleikamp case Opt_orlov: 1546fd8c37ecSTheodore Ts'o clear_opt(sb, OLDALLOC); 1547ac27a0ecSDave Kleikamp break; 154803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1549ac27a0ecSDave Kleikamp case Opt_user_xattr: 1550fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 1551ac27a0ecSDave Kleikamp break; 1552ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1553fd8c37ecSTheodore Ts'o clear_opt(sb, XATTR_USER); 1554ac27a0ecSDave Kleikamp break; 1555ac27a0ecSDave Kleikamp #else 1556ac27a0ecSDave Kleikamp case Opt_user_xattr: 1557ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1558b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1559ac27a0ecSDave Kleikamp break; 1560ac27a0ecSDave Kleikamp #endif 156103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1562ac27a0ecSDave Kleikamp case Opt_acl: 1563fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 1564ac27a0ecSDave Kleikamp break; 1565ac27a0ecSDave Kleikamp case Opt_noacl: 1566fd8c37ecSTheodore Ts'o clear_opt(sb, POSIX_ACL); 1567ac27a0ecSDave Kleikamp break; 1568ac27a0ecSDave Kleikamp #else 1569ac27a0ecSDave Kleikamp case Opt_acl: 1570ac27a0ecSDave Kleikamp case Opt_noacl: 1571b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1572ac27a0ecSDave Kleikamp break; 1573ac27a0ecSDave Kleikamp #endif 1574ac27a0ecSDave Kleikamp case Opt_journal_update: 1575ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1576ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1577ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1578ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1579ac27a0ecSDave Kleikamp journal file. */ 1580ac27a0ecSDave Kleikamp if (is_remount) { 1581b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1582b31e1552SEric Sandeen "Cannot specify journal on remount"); 1583ac27a0ecSDave Kleikamp return 0; 1584ac27a0ecSDave Kleikamp } 1585fd8c37ecSTheodore Ts'o set_opt(sb, UPDATE_JOURNAL); 1586ac27a0ecSDave Kleikamp break; 1587ac27a0ecSDave Kleikamp case Opt_journal_dev: 1588ac27a0ecSDave Kleikamp if (is_remount) { 1589b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1590b31e1552SEric Sandeen "Cannot specify journal on remount"); 1591ac27a0ecSDave Kleikamp return 0; 1592ac27a0ecSDave Kleikamp } 1593ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1594ac27a0ecSDave Kleikamp return 0; 1595ac27a0ecSDave Kleikamp *journal_devnum = option; 1596ac27a0ecSDave Kleikamp break; 1597818d276cSGirish Shilamkar case Opt_journal_checksum: 1598fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1599d4da6c9cSLinus Torvalds break; 1600818d276cSGirish Shilamkar case Opt_journal_async_commit: 1601fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_ASYNC_COMMIT); 1602fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_CHECKSUM); 1603818d276cSGirish Shilamkar break; 1604ac27a0ecSDave Kleikamp case Opt_noload: 1605fd8c37ecSTheodore Ts'o set_opt(sb, NOLOAD); 1606ac27a0ecSDave Kleikamp break; 1607ac27a0ecSDave Kleikamp case Opt_commit: 1608ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1609ac27a0ecSDave Kleikamp return 0; 1610ac27a0ecSDave Kleikamp if (option < 0) 1611ac27a0ecSDave Kleikamp return 0; 1612ac27a0ecSDave Kleikamp if (option == 0) 1613cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1614ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1615ac27a0ecSDave Kleikamp break; 161630773840STheodore Ts'o case Opt_max_batch_time: 161730773840STheodore Ts'o if (match_int(&args[0], &option)) 161830773840STheodore Ts'o return 0; 161930773840STheodore Ts'o if (option < 0) 162030773840STheodore Ts'o return 0; 162130773840STheodore Ts'o if (option == 0) 162230773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 162330773840STheodore Ts'o sbi->s_max_batch_time = option; 162430773840STheodore Ts'o break; 162530773840STheodore Ts'o case Opt_min_batch_time: 162630773840STheodore Ts'o if (match_int(&args[0], &option)) 162730773840STheodore Ts'o return 0; 162830773840STheodore Ts'o if (option < 0) 162930773840STheodore Ts'o return 0; 163030773840STheodore Ts'o sbi->s_min_batch_time = option; 163130773840STheodore Ts'o break; 1632ac27a0ecSDave Kleikamp case Opt_data_journal: 1633617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1634ac27a0ecSDave Kleikamp goto datacheck; 1635ac27a0ecSDave Kleikamp case Opt_data_ordered: 1636617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1637ac27a0ecSDave Kleikamp goto datacheck; 1638ac27a0ecSDave Kleikamp case Opt_data_writeback: 1639617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1640ac27a0ecSDave Kleikamp datacheck: 1641ac27a0ecSDave Kleikamp if (is_remount) { 1642482a7425SDmitry Monakhov if (test_opt(sb, DATA_FLAGS) != data_opt) { 1643b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1644b31e1552SEric Sandeen "Cannot change data mode on remount"); 1645ac27a0ecSDave Kleikamp return 0; 1646ac27a0ecSDave Kleikamp } 1647ac27a0ecSDave Kleikamp } else { 1648fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 1649ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1650ac27a0ecSDave Kleikamp } 1651ac27a0ecSDave Kleikamp break; 16525bf5683aSHidehiro Kawai case Opt_data_err_abort: 1653fd8c37ecSTheodore Ts'o set_opt(sb, DATA_ERR_ABORT); 16545bf5683aSHidehiro Kawai break; 16555bf5683aSHidehiro Kawai case Opt_data_err_ignore: 1656fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_ERR_ABORT); 16575bf5683aSHidehiro Kawai break; 1658ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1659ac27a0ecSDave Kleikamp case Opt_usrjquota: 166056c50f11SDmitry Monakhov if (!set_qf_name(sb, USRQUOTA, &args[0])) 166156c50f11SDmitry Monakhov return 0; 166256c50f11SDmitry Monakhov break; 1663ac27a0ecSDave Kleikamp case Opt_grpjquota: 166456c50f11SDmitry Monakhov if (!set_qf_name(sb, GRPQUOTA, &args[0])) 1665ac27a0ecSDave Kleikamp return 0; 1666ac27a0ecSDave Kleikamp break; 1667ac27a0ecSDave Kleikamp case Opt_offusrjquota: 166856c50f11SDmitry Monakhov if (!clear_qf_name(sb, USRQUOTA)) 1669ac27a0ecSDave Kleikamp return 0; 1670ac27a0ecSDave Kleikamp break; 167156c50f11SDmitry Monakhov case Opt_offgrpjquota: 167256c50f11SDmitry Monakhov if (!clear_qf_name(sb, GRPQUOTA)) 167356c50f11SDmitry Monakhov return 0; 167456c50f11SDmitry Monakhov break; 167556c50f11SDmitry Monakhov 1676ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1677dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1678dfc5d03fSJan Kara goto set_qf_format; 1679ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1680dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 16815a20bdfcSJan Kara goto set_qf_format; 16825a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 16835a20bdfcSJan Kara qfmt = QFMT_VFS_V1; 1684dfc5d03fSJan Kara set_qf_format: 168517bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1686dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1687b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1688dfc5d03fSJan Kara "journaled quota options when " 1689b31e1552SEric Sandeen "quota turned on"); 1690dfc5d03fSJan Kara return 0; 1691dfc5d03fSJan Kara } 1692dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1693ac27a0ecSDave Kleikamp break; 1694ac27a0ecSDave Kleikamp case Opt_quota: 1695ac27a0ecSDave Kleikamp case Opt_usrquota: 1696fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1697fd8c37ecSTheodore Ts'o set_opt(sb, USRQUOTA); 1698ac27a0ecSDave Kleikamp break; 1699ac27a0ecSDave Kleikamp case Opt_grpquota: 1700fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 1701fd8c37ecSTheodore Ts'o set_opt(sb, GRPQUOTA); 1702ac27a0ecSDave Kleikamp break; 1703ac27a0ecSDave Kleikamp case Opt_noquota: 170417bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1705b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1706b31e1552SEric Sandeen "options when quota turned on"); 1707ac27a0ecSDave Kleikamp return 0; 1708ac27a0ecSDave Kleikamp } 1709fd8c37ecSTheodore Ts'o clear_opt(sb, QUOTA); 1710fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1711fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1712ac27a0ecSDave Kleikamp break; 1713ac27a0ecSDave Kleikamp #else 1714ac27a0ecSDave Kleikamp case Opt_quota: 1715ac27a0ecSDave Kleikamp case Opt_usrquota: 1716ac27a0ecSDave Kleikamp case Opt_grpquota: 1717b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1718b31e1552SEric Sandeen "quota options not supported"); 1719cd59e7b9SJan Kara break; 1720ac27a0ecSDave Kleikamp case Opt_usrjquota: 1721ac27a0ecSDave Kleikamp case Opt_grpjquota: 1722ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1723ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1724ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1725ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 17265a20bdfcSJan Kara case Opt_jqfmt_vfsv1: 1727b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1728b31e1552SEric Sandeen "journaled quota options not supported"); 1729ac27a0ecSDave Kleikamp break; 1730ac27a0ecSDave Kleikamp case Opt_noquota: 1731ac27a0ecSDave Kleikamp break; 1732ac27a0ecSDave Kleikamp #endif 1733ac27a0ecSDave Kleikamp case Opt_abort: 17344ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1735ac27a0ecSDave Kleikamp break; 173606705bffSTheodore Ts'o case Opt_nobarrier: 1737fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 173806705bffSTheodore Ts'o break; 1739ac27a0ecSDave Kleikamp case Opt_barrier: 174015121c18SEric Sandeen if (args[0].from) { 174115121c18SEric Sandeen if (match_int(&args[0], &option)) 174215121c18SEric Sandeen return 0; 174315121c18SEric Sandeen } else 174415121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1745ac27a0ecSDave Kleikamp if (option) 1746fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 1747ac27a0ecSDave Kleikamp else 1748fd8c37ecSTheodore Ts'o clear_opt(sb, BARRIER); 1749ac27a0ecSDave Kleikamp break; 1750ac27a0ecSDave Kleikamp case Opt_ignore: 1751ac27a0ecSDave Kleikamp break; 1752ac27a0ecSDave Kleikamp case Opt_resize: 1753ac27a0ecSDave Kleikamp if (!is_remount) { 1754b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1755b31e1552SEric Sandeen "resize option only available " 1756b31e1552SEric Sandeen "for remount"); 1757ac27a0ecSDave Kleikamp return 0; 1758ac27a0ecSDave Kleikamp } 1759ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1760ac27a0ecSDave Kleikamp return 0; 1761ac27a0ecSDave Kleikamp *n_blocks_count = option; 1762ac27a0ecSDave Kleikamp break; 1763ac27a0ecSDave Kleikamp case Opt_nobh: 1764206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1765206f7ab4SChristoph Hellwig "Ignoring deprecated nobh option"); 1766ac27a0ecSDave Kleikamp break; 1767ac27a0ecSDave Kleikamp case Opt_bh: 1768206f7ab4SChristoph Hellwig ext4_msg(sb, KERN_WARNING, 1769206f7ab4SChristoph Hellwig "Ignoring deprecated bh option"); 1770ac27a0ecSDave Kleikamp break; 177125ec56b5SJean Noel Cordenner case Opt_i_version: 1772fd8c37ecSTheodore Ts'o set_opt(sb, I_VERSION); 177325ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 177425ec56b5SJean Noel Cordenner break; 1775dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1776fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 1777dd919b98SAneesh Kumar K.V break; 17781449032bSTheodore Ts'o case Opt_mblk_io_submit: 1779fd8c37ecSTheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 17801449032bSTheodore Ts'o break; 17811449032bSTheodore Ts'o case Opt_nomblk_io_submit: 1782fd8c37ecSTheodore Ts'o clear_opt(sb, MBLK_IO_SUBMIT); 17831449032bSTheodore Ts'o break; 1784c9de560dSAlex Tomas case Opt_stripe: 1785c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1786c9de560dSAlex Tomas return 0; 1787c9de560dSAlex Tomas if (option < 0) 1788c9de560dSAlex Tomas return 0; 1789c9de560dSAlex Tomas sbi->s_stripe = option; 1790c9de560dSAlex Tomas break; 179164769240SAlex Tomas case Opt_delalloc: 1792fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 179364769240SAlex Tomas break; 17946fd058f7STheodore Ts'o case Opt_block_validity: 1795fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 17966fd058f7STheodore Ts'o break; 17976fd058f7STheodore Ts'o case Opt_noblock_validity: 1798fd8c37ecSTheodore Ts'o clear_opt(sb, BLOCK_VALIDITY); 17996fd058f7STheodore Ts'o break; 1800240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1801240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1802240799cdSTheodore Ts'o return 0; 1803240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1804240799cdSTheodore Ts'o return 0; 18055dbd571dSAlexander V. Lukyanov if (option && !is_power_of_2(option)) { 1806b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1807b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1808b31e1552SEric Sandeen " must be a power of 2"); 18093197ebdbSTheodore Ts'o return 0; 18103197ebdbSTheodore Ts'o } 1811240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1812240799cdSTheodore Ts'o break; 1813b3881f74STheodore Ts'o case Opt_journal_ioprio: 1814b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1815b3881f74STheodore Ts'o return 0; 1816b3881f74STheodore Ts'o if (option < 0 || option > 7) 1817b3881f74STheodore Ts'o break; 1818b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1819b3881f74STheodore Ts'o option); 1820b3881f74STheodore Ts'o break; 182106705bffSTheodore Ts'o case Opt_noauto_da_alloc: 1822fd8c37ecSTheodore Ts'o set_opt(sb, NO_AUTO_DA_ALLOC); 182306705bffSTheodore Ts'o break; 1824afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 182515121c18SEric Sandeen if (args[0].from) { 182615121c18SEric Sandeen if (match_int(&args[0], &option)) 182715121c18SEric Sandeen return 0; 182815121c18SEric Sandeen } else 182915121c18SEric Sandeen option = 1; /* No argument, default to 1 */ 1830afd4672dSTheodore Ts'o if (option) 1831fd8c37ecSTheodore Ts'o clear_opt(sb, NO_AUTO_DA_ALLOC); 1832afd4672dSTheodore Ts'o else 1833fd8c37ecSTheodore Ts'o set_opt(sb,NO_AUTO_DA_ALLOC); 1834afd4672dSTheodore Ts'o break; 18355328e635SEric Sandeen case Opt_discard: 1836fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 18375328e635SEric Sandeen break; 18385328e635SEric Sandeen case Opt_nodiscard: 1839fd8c37ecSTheodore Ts'o clear_opt(sb, DISCARD); 18405328e635SEric Sandeen break; 1841744692dcSJiaying Zhang case Opt_dioread_nolock: 1842fd8c37ecSTheodore Ts'o set_opt(sb, DIOREAD_NOLOCK); 1843744692dcSJiaying Zhang break; 1844744692dcSJiaying Zhang case Opt_dioread_lock: 1845fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 1846744692dcSJiaying Zhang break; 1847bfff6873SLukas Czerner case Opt_init_inode_table: 1848fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 1849bfff6873SLukas Czerner if (args[0].from) { 1850bfff6873SLukas Czerner if (match_int(&args[0], &option)) 1851bfff6873SLukas Czerner return 0; 1852bfff6873SLukas Czerner } else 1853bfff6873SLukas Czerner option = EXT4_DEF_LI_WAIT_MULT; 1854bfff6873SLukas Czerner if (option < 0) 1855bfff6873SLukas Czerner return 0; 1856bfff6873SLukas Czerner sbi->s_li_wait_mult = option; 1857bfff6873SLukas Czerner break; 1858bfff6873SLukas Czerner case Opt_noinit_inode_table: 1859fd8c37ecSTheodore Ts'o clear_opt(sb, INIT_INODE_TABLE); 1860bfff6873SLukas Czerner break; 1861ac27a0ecSDave Kleikamp default: 1862b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1863b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1864b31e1552SEric Sandeen "or missing value", p); 1865ac27a0ecSDave Kleikamp return 0; 1866ac27a0ecSDave Kleikamp } 1867ac27a0ecSDave Kleikamp } 1868ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1869ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1870482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1871fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1872ac27a0ecSDave Kleikamp 1873482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1874fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1875ac27a0ecSDave Kleikamp 187656c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1877b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1878b31e1552SEric Sandeen "format mixing"); 1879ac27a0ecSDave Kleikamp return 0; 1880ac27a0ecSDave Kleikamp } 1881ac27a0ecSDave Kleikamp 1882ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1883b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1884b31e1552SEric Sandeen "not specified"); 1885ac27a0ecSDave Kleikamp return 0; 1886ac27a0ecSDave Kleikamp } 1887ac27a0ecSDave Kleikamp } else { 1888ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1889b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 18902c8be6b2SJan Kara "specified with no journaling " 1891b31e1552SEric Sandeen "enabled"); 1892ac27a0ecSDave Kleikamp return 0; 1893ac27a0ecSDave Kleikamp } 1894ac27a0ecSDave Kleikamp } 1895ac27a0ecSDave Kleikamp #endif 1896ac27a0ecSDave Kleikamp return 1; 1897ac27a0ecSDave Kleikamp } 1898ac27a0ecSDave Kleikamp 1899617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1900ac27a0ecSDave Kleikamp int read_only) 1901ac27a0ecSDave Kleikamp { 1902617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1903ac27a0ecSDave Kleikamp int res = 0; 1904ac27a0ecSDave Kleikamp 1905617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1906b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1907b31e1552SEric Sandeen "forcing read-only mode"); 1908ac27a0ecSDave Kleikamp res = MS_RDONLY; 1909ac27a0ecSDave Kleikamp } 1910ac27a0ecSDave Kleikamp if (read_only) 1911ac27a0ecSDave Kleikamp return res; 1912617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1913b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1914b31e1552SEric Sandeen "running e2fsck is recommended"); 1915617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1916b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1917b31e1552SEric Sandeen "warning: mounting fs with errors, " 1918b31e1552SEric Sandeen "running e2fsck is recommended"); 1919ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1920ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1921ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1922b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1923b31e1552SEric Sandeen "warning: maximal mount count reached, " 1924b31e1552SEric Sandeen "running e2fsck is recommended"); 1925ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1926ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1927ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1928b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1929b31e1552SEric Sandeen "warning: checktime reached, " 1930b31e1552SEric Sandeen "running e2fsck is recommended"); 19310390131bSFrank Mayhar if (!sbi->s_journal) 1932216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1933ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1934617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1935e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1936ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1937617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19380390131bSFrank Mayhar if (sbi->s_journal) 1939617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1940ac27a0ecSDave Kleikamp 1941e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1942ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1943a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1944a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1945ac27a0ecSDave Kleikamp sb->s_blocksize, 1946ac27a0ecSDave Kleikamp sbi->s_groups_count, 1947617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1948617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1949a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1950ac27a0ecSDave Kleikamp 1951ac27a0ecSDave Kleikamp return res; 1952ac27a0ecSDave Kleikamp } 1953ac27a0ecSDave Kleikamp 1954772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1955772cb7c8SJose R. Santos { 1956772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1957772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1958772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1959772cb7c8SJose R. Santos ext4_group_t flex_group; 1960772cb7c8SJose R. Santos int groups_per_flex = 0; 1961c5ca7c76STheodore Ts'o size_t size; 1962772cb7c8SJose R. Santos int i; 1963772cb7c8SJose R. Santos 1964503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1965503358aeSTheodore Ts'o groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1966503358aeSTheodore Ts'o 1967503358aeSTheodore Ts'o if (groups_per_flex < 2) { 1968772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1969772cb7c8SJose R. Santos return 1; 1970772cb7c8SJose R. Santos } 1971772cb7c8SJose R. Santos 1972c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1973c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1974d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1975d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1976c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1977c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1978c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 197994de56abSJoe Perches sbi->s_flex_groups = vzalloc(size); 1980772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 198194de56abSJoe Perches ext4_msg(sb, KERN_ERR, 198294de56abSJoe Perches "not enough memory for %u flex groups", 198394de56abSJoe Perches flex_group_count); 1984772cb7c8SJose R. Santos goto failed; 1985772cb7c8SJose R. Santos } 198694de56abSJoe Perches } 1987772cb7c8SJose R. Santos 1988772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 198988b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1990772cb7c8SJose R. Santos 1991772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19927ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19937ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 19947ad9bb65STheodore Ts'o atomic_add(ext4_free_blks_count(sb, gdp), 19957ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_blocks); 19967ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 19977ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 1998772cb7c8SJose R. Santos } 1999772cb7c8SJose R. Santos 2000772cb7c8SJose R. Santos return 1; 2001772cb7c8SJose R. Santos failed: 2002772cb7c8SJose R. Santos return 0; 2003772cb7c8SJose R. Santos } 2004772cb7c8SJose R. Santos 2005717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 2006717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2007717d50e4SAndreas Dilger { 2008717d50e4SAndreas Dilger __u16 crc = 0; 2009717d50e4SAndreas Dilger 2010717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 2011717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 2012717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 2013717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2014717d50e4SAndreas Dilger 2015717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2016717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2017717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2018717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2019717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2020717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2021717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2022717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2023717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2024717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2025717d50e4SAndreas Dilger offset); 2026717d50e4SAndreas Dilger } 2027717d50e4SAndreas Dilger 2028717d50e4SAndreas Dilger return cpu_to_le16(crc); 2029717d50e4SAndreas Dilger } 2030717d50e4SAndreas Dilger 2031717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 2032717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2033717d50e4SAndreas Dilger { 2034717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 2035717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 2036717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 2037717d50e4SAndreas Dilger return 0; 2038717d50e4SAndreas Dilger 2039717d50e4SAndreas Dilger return 1; 2040717d50e4SAndreas Dilger } 2041717d50e4SAndreas Dilger 2042ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2043bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2044bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2045ac27a0ecSDave Kleikamp { 2046617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2047617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2048617ba13bSMingming Cao ext4_fsblk_t last_block; 2049bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2050bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2051bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2052ce421581SJose R. Santos int flexbg_flag = 0; 2053bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2054ac27a0ecSDave Kleikamp 2055ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2056ce421581SJose R. Santos flexbg_flag = 1; 2057ce421581SJose R. Santos 2058617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2059ac27a0ecSDave Kleikamp 2060197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2061197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2062197cd65aSAkinobu Mita 2063ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2064bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2065ac27a0ecSDave Kleikamp else 2066ac27a0ecSDave Kleikamp last_block = first_block + 2067617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2068ac27a0ecSDave Kleikamp 2069bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2070bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2071bfff6873SLukas Czerner grp = i; 2072bfff6873SLukas Czerner 20738fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 20742b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2075b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2076a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2077b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2078ac27a0ecSDave Kleikamp return 0; 2079ac27a0ecSDave Kleikamp } 20808fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 20812b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2082b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2083a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2084b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2085ac27a0ecSDave Kleikamp return 0; 2086ac27a0ecSDave Kleikamp } 20878fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2088bd81d8eeSLaurent Vivier if (inode_table < first_block || 20892b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2090b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2091a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2092b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2093ac27a0ecSDave Kleikamp return 0; 2094ac27a0ecSDave Kleikamp } 2095955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2096717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 2097b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2098b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2099fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2100fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21017ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2102955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2103717d50e4SAndreas Dilger return 0; 2104717d50e4SAndreas Dilger } 21057ee1ec4cSLi Zefan } 2106955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2107ce421581SJose R. Santos if (!flexbg_flag) 2108617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2109ac27a0ecSDave Kleikamp } 2110bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2111bfff6873SLukas Czerner *first_not_zeroed = grp; 2112ac27a0ecSDave Kleikamp 2113bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 2114617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2115ac27a0ecSDave Kleikamp return 1; 2116ac27a0ecSDave Kleikamp } 2117ac27a0ecSDave Kleikamp 2118617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2119ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2120ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2121ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2122ac27a0ecSDave Kleikamp * 2123ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2124ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2125ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2126ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2127ac27a0ecSDave Kleikamp * 2128ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2129ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2130ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2131617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2132ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2133ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2134ac27a0ecSDave Kleikamp */ 2135617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2136617ba13bSMingming Cao struct ext4_super_block *es) 2137ac27a0ecSDave Kleikamp { 2138ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2139ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2140ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2141ac27a0ecSDave Kleikamp int i; 2142ac27a0ecSDave Kleikamp #endif 2143ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2144ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2145ac27a0ecSDave Kleikamp return; 2146ac27a0ecSDave Kleikamp } 2147ac27a0ecSDave Kleikamp 2148a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2149b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2150b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2151a8f48a95SEric Sandeen return; 2152a8f48a95SEric Sandeen } 2153a8f48a95SEric Sandeen 2154d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2155d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2156d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2157d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2158d39195c3SAmir Goldstein return; 2159d39195c3SAmir Goldstein } 2160d39195c3SAmir Goldstein 2161617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2162ac27a0ecSDave Kleikamp if (es->s_last_orphan) 2163ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2164ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2165ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2166ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2167ac27a0ecSDave Kleikamp return; 2168ac27a0ecSDave Kleikamp } 2169ac27a0ecSDave Kleikamp 2170ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2171b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2172ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2173ac27a0ecSDave Kleikamp } 2174ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2175ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2176ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2177ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2178ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2179617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2180617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2181ac27a0ecSDave Kleikamp if (ret < 0) 2182b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2183b31e1552SEric Sandeen "Cannot turn on journaled " 2184b31e1552SEric Sandeen "quota: error %d", ret); 2185ac27a0ecSDave Kleikamp } 2186ac27a0ecSDave Kleikamp } 2187ac27a0ecSDave Kleikamp #endif 2188ac27a0ecSDave Kleikamp 2189ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2190ac27a0ecSDave Kleikamp struct inode *inode; 2191ac27a0ecSDave Kleikamp 219297bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 219397bd42b9SJosef Bacik if (IS_ERR(inode)) { 2194ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2195ac27a0ecSDave Kleikamp break; 2196ac27a0ecSDave Kleikamp } 2197ac27a0ecSDave Kleikamp 2198617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2199871a2931SChristoph Hellwig dquot_initialize(inode); 2200ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2201b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2202b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 220346e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2204e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2205ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2206617ba13bSMingming Cao ext4_truncate(inode); 2207ac27a0ecSDave Kleikamp nr_truncates++; 2208ac27a0ecSDave Kleikamp } else { 2209b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2210b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 221146e665e9SHarvey Harrison __func__, inode->i_ino); 2212ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2213ac27a0ecSDave Kleikamp inode->i_ino); 2214ac27a0ecSDave Kleikamp nr_orphans++; 2215ac27a0ecSDave Kleikamp } 2216ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2217ac27a0ecSDave Kleikamp } 2218ac27a0ecSDave Kleikamp 2219ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2220ac27a0ecSDave Kleikamp 2221ac27a0ecSDave Kleikamp if (nr_orphans) 2222b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2223b31e1552SEric Sandeen PLURAL(nr_orphans)); 2224ac27a0ecSDave Kleikamp if (nr_truncates) 2225b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2226b31e1552SEric Sandeen PLURAL(nr_truncates)); 2227ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2228ac27a0ecSDave Kleikamp /* Turn quotas off */ 2229ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2230ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2231287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2232ac27a0ecSDave Kleikamp } 2233ac27a0ecSDave Kleikamp #endif 2234ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2235ac27a0ecSDave Kleikamp } 22360b8e58a1SAndreas Dilger 2237cd2291a4SEric Sandeen /* 2238cd2291a4SEric Sandeen * Maximal extent format file size. 2239cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2240cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2241cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2242cd2291a4SEric Sandeen * so that won't be a limiting factor. 2243cd2291a4SEric Sandeen * 2244cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2245cd2291a4SEric Sandeen */ 2246f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2247cd2291a4SEric Sandeen { 2248cd2291a4SEric Sandeen loff_t res; 2249cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2250cd2291a4SEric Sandeen 2251cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2252f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2253cd2291a4SEric Sandeen /* 225490c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2255cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2256cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2257cd2291a4SEric Sandeen */ 2258cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2259cd2291a4SEric Sandeen 2260cd2291a4SEric Sandeen /* total blocks in file system block size */ 2261cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2262cd2291a4SEric Sandeen upper_limit <<= blkbits; 2263cd2291a4SEric Sandeen } 2264cd2291a4SEric Sandeen 2265cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 2266cd2291a4SEric Sandeen res = 1LL << 32; 2267cd2291a4SEric Sandeen res <<= blkbits; 2268cd2291a4SEric Sandeen res -= 1; 2269cd2291a4SEric Sandeen 2270cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2271cd2291a4SEric Sandeen if (res > upper_limit) 2272cd2291a4SEric Sandeen res = upper_limit; 2273cd2291a4SEric Sandeen 2274cd2291a4SEric Sandeen return res; 2275cd2291a4SEric Sandeen } 2276ac27a0ecSDave Kleikamp 2277ac27a0ecSDave Kleikamp /* 2278cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 22790fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 22800fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2281ac27a0ecSDave Kleikamp */ 2282f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2283ac27a0ecSDave Kleikamp { 2284617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 22850fc1b451SAneesh Kumar K.V int meta_blocks; 22860fc1b451SAneesh Kumar K.V loff_t upper_limit; 22870b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 22880b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 22890b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 22900b8e58a1SAndreas Dilger * 22910b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 22920b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 22930fc1b451SAneesh Kumar K.V */ 22940fc1b451SAneesh Kumar K.V 2295f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 22960fc1b451SAneesh Kumar K.V /* 229790c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 22980b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 22990b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23000fc1b451SAneesh Kumar K.V */ 23010fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23020fc1b451SAneesh Kumar K.V 23030fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23040fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23050fc1b451SAneesh Kumar K.V 23060fc1b451SAneesh Kumar K.V } else { 23078180a562SAneesh Kumar K.V /* 23088180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23098180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23108180a562SAneesh Kumar K.V * represent total number of blocks in 23118180a562SAneesh Kumar K.V * file system block size 23128180a562SAneesh Kumar K.V */ 23130fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23140fc1b451SAneesh Kumar K.V 23150fc1b451SAneesh Kumar K.V } 23160fc1b451SAneesh Kumar K.V 23170fc1b451SAneesh Kumar K.V /* indirect blocks */ 23180fc1b451SAneesh Kumar K.V meta_blocks = 1; 23190fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23200fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23210fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23220fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23230fc1b451SAneesh Kumar K.V 23240fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23250fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2326ac27a0ecSDave Kleikamp 2327ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2328ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2329ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2330ac27a0ecSDave Kleikamp res <<= bits; 2331ac27a0ecSDave Kleikamp if (res > upper_limit) 2332ac27a0ecSDave Kleikamp res = upper_limit; 23330fc1b451SAneesh Kumar K.V 23340fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23350fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23360fc1b451SAneesh Kumar K.V 2337ac27a0ecSDave Kleikamp return res; 2338ac27a0ecSDave Kleikamp } 2339ac27a0ecSDave Kleikamp 2340617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 234170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2342ac27a0ecSDave Kleikamp { 2343617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2344fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2345ac27a0ecSDave Kleikamp int has_super = 0; 2346ac27a0ecSDave Kleikamp 2347ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2348ac27a0ecSDave Kleikamp 2349617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2350ac27a0ecSDave Kleikamp nr < first_meta_bg) 235170bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2352ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2353617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2354ac27a0ecSDave Kleikamp has_super = 1; 23550b8e58a1SAndreas Dilger 2356617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2357ac27a0ecSDave Kleikamp } 2358ac27a0ecSDave Kleikamp 2359c9de560dSAlex Tomas /** 2360c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2361c9de560dSAlex Tomas * @sbi: In memory super block info 2362c9de560dSAlex Tomas * 2363c9de560dSAlex Tomas * If we have specified it via mount option, then 2364c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2365c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2366c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2367c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2368c9de560dSAlex Tomas * 2369c9de560dSAlex Tomas */ 2370c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2371c9de560dSAlex Tomas { 2372c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2373c9de560dSAlex Tomas unsigned long stripe_width = 2374c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2375c9de560dSAlex Tomas 2376c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2377c9de560dSAlex Tomas return sbi->s_stripe; 2378c9de560dSAlex Tomas 2379c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2380c9de560dSAlex Tomas return stripe_width; 2381c9de560dSAlex Tomas 2382c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2383c9de560dSAlex Tomas return stride; 2384c9de560dSAlex Tomas 2385c9de560dSAlex Tomas return 0; 2386c9de560dSAlex Tomas } 2387ac27a0ecSDave Kleikamp 23883197ebdbSTheodore Ts'o /* sysfs supprt */ 23893197ebdbSTheodore Ts'o 23903197ebdbSTheodore Ts'o struct ext4_attr { 23913197ebdbSTheodore Ts'o struct attribute attr; 23923197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 23933197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 23943197ebdbSTheodore Ts'o const char *, size_t); 23953197ebdbSTheodore Ts'o int offset; 23963197ebdbSTheodore Ts'o }; 23973197ebdbSTheodore Ts'o 23983197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 23993197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 24003197ebdbSTheodore Ts'o { 24013197ebdbSTheodore Ts'o char *endp; 24023197ebdbSTheodore Ts'o 2403e7d2860bSAndré Goddard Rosa *value = simple_strtoul(skip_spaces(buf), &endp, 0); 2404e7d2860bSAndré Goddard Rosa endp = skip_spaces(endp); 24053197ebdbSTheodore Ts'o if (*endp || *value > max) 24063197ebdbSTheodore Ts'o return -EINVAL; 24073197ebdbSTheodore Ts'o 24083197ebdbSTheodore Ts'o return 0; 24093197ebdbSTheodore Ts'o } 24103197ebdbSTheodore Ts'o 24113197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24123197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24133197ebdbSTheodore Ts'o char *buf) 24143197ebdbSTheodore Ts'o { 24153197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24163197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 24173197ebdbSTheodore Ts'o } 24183197ebdbSTheodore Ts'o 24193197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24213197ebdbSTheodore Ts'o { 24223197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24233197ebdbSTheodore Ts'o 2424f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2425f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24263197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24273197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24283197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24293197ebdbSTheodore Ts'o } 24303197ebdbSTheodore Ts'o 24313197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24323197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24333197ebdbSTheodore Ts'o { 24343197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24353197ebdbSTheodore Ts'o 2436f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2437f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24383197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2439a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24403197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2441a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24423197ebdbSTheodore Ts'o } 24433197ebdbSTheodore Ts'o 244477f4135fSVivek Haldar static ssize_t extent_cache_hits_show(struct ext4_attr *a, 244577f4135fSVivek Haldar struct ext4_sb_info *sbi, char *buf) 244677f4135fSVivek Haldar { 244777f4135fSVivek Haldar return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_hits); 244877f4135fSVivek Haldar } 244977f4135fSVivek Haldar 245077f4135fSVivek Haldar static ssize_t extent_cache_misses_show(struct ext4_attr *a, 245177f4135fSVivek Haldar struct ext4_sb_info *sbi, char *buf) 245277f4135fSVivek Haldar { 245377f4135fSVivek Haldar return snprintf(buf, PAGE_SIZE, "%lu\n", sbi->extent_cache_misses); 245477f4135fSVivek Haldar } 245577f4135fSVivek Haldar 24563197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 24573197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24583197ebdbSTheodore Ts'o const char *buf, size_t count) 24593197ebdbSTheodore Ts'o { 24603197ebdbSTheodore Ts'o unsigned long t; 24613197ebdbSTheodore Ts'o 24623197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 24633197ebdbSTheodore Ts'o return -EINVAL; 24643197ebdbSTheodore Ts'o 24655dbd571dSAlexander V. Lukyanov if (t && !is_power_of_2(t)) 24663197ebdbSTheodore Ts'o return -EINVAL; 24673197ebdbSTheodore Ts'o 24683197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 24693197ebdbSTheodore Ts'o return count; 24703197ebdbSTheodore Ts'o } 24713197ebdbSTheodore Ts'o 24723197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 24733197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24743197ebdbSTheodore Ts'o { 24753197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24763197ebdbSTheodore Ts'o 24773197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 24783197ebdbSTheodore Ts'o } 24793197ebdbSTheodore Ts'o 24803197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 24813197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24823197ebdbSTheodore Ts'o const char *buf, size_t count) 24833197ebdbSTheodore Ts'o { 24843197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 24853197ebdbSTheodore Ts'o unsigned long t; 24863197ebdbSTheodore Ts'o 24873197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 24883197ebdbSTheodore Ts'o return -EINVAL; 24893197ebdbSTheodore Ts'o *ui = t; 24903197ebdbSTheodore Ts'o return count; 24913197ebdbSTheodore Ts'o } 24923197ebdbSTheodore Ts'o 24933197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 24943197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 24953197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 24963197ebdbSTheodore Ts'o .show = _show, \ 24973197ebdbSTheodore Ts'o .store = _store, \ 24983197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 24993197ebdbSTheodore Ts'o } 25003197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25013197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25023197ebdbSTheodore Ts'o 2503857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25043197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25053197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 25063197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 25073197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 25083197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 25093197ebdbSTheodore Ts'o 25103197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 25113197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 25123197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 251377f4135fSVivek Haldar EXT4_RO_ATTR(extent_cache_hits); 251477f4135fSVivek Haldar EXT4_RO_ATTR(extent_cache_misses); 25153197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 25163197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 251711013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 25183197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 25193197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 25203197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 25213197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 25223197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 25233197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 252455138e0bSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(max_writeback_mb_bump, s_max_writeback_mb_bump); 25253197ebdbSTheodore Ts'o 25263197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 25273197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 25283197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 25293197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 253077f4135fSVivek Haldar ATTR_LIST(extent_cache_hits), 253177f4135fSVivek Haldar ATTR_LIST(extent_cache_misses), 25323197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 253311013911SAndreas Dilger ATTR_LIST(inode_goal), 25343197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 25353197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 25363197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 25373197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 25383197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 25393197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 254055138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 25413197ebdbSTheodore Ts'o NULL, 25423197ebdbSTheodore Ts'o }; 25433197ebdbSTheodore Ts'o 2544857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2545857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 254627ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 2547857ac889SLukas Czerner 2548857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2549857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 255027ee40dfSLukas Czerner ATTR_LIST(batched_discard), 2551857ac889SLukas Czerner NULL, 2552857ac889SLukas Czerner }; 2553857ac889SLukas Czerner 25543197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 25553197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 25563197ebdbSTheodore Ts'o { 25573197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25583197ebdbSTheodore Ts'o s_kobj); 25593197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25603197ebdbSTheodore Ts'o 25613197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 25623197ebdbSTheodore Ts'o } 25633197ebdbSTheodore Ts'o 25643197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 25653197ebdbSTheodore Ts'o struct attribute *attr, 25663197ebdbSTheodore Ts'o const char *buf, size_t len) 25673197ebdbSTheodore Ts'o { 25683197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25693197ebdbSTheodore Ts'o s_kobj); 25703197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 25713197ebdbSTheodore Ts'o 25723197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 25733197ebdbSTheodore Ts'o } 25743197ebdbSTheodore Ts'o 25753197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 25763197ebdbSTheodore Ts'o { 25773197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 25783197ebdbSTheodore Ts'o s_kobj); 25793197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 25803197ebdbSTheodore Ts'o } 25813197ebdbSTheodore Ts'o 258252cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 25833197ebdbSTheodore Ts'o .show = ext4_attr_show, 25843197ebdbSTheodore Ts'o .store = ext4_attr_store, 25853197ebdbSTheodore Ts'o }; 25863197ebdbSTheodore Ts'o 25873197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 25883197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 25893197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 25903197ebdbSTheodore Ts'o .release = ext4_sb_release, 25913197ebdbSTheodore Ts'o }; 25923197ebdbSTheodore Ts'o 2593857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2594857ac889SLukas Czerner { 2595857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2596857ac889SLukas Czerner } 2597857ac889SLukas Czerner 2598857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2599857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2600857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2601857ac889SLukas Czerner .release = ext4_feat_release, 2602857ac889SLukas Czerner }; 2603857ac889SLukas Czerner 2604a13fb1a4SEric Sandeen /* 2605a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2606a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2607a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2608a13fb1a4SEric Sandeen * 0 if it cannot be. 2609a13fb1a4SEric Sandeen */ 2610a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2611a13fb1a4SEric Sandeen { 2612a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2613a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2614a13fb1a4SEric Sandeen "Couldn't mount because of " 2615a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2616a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2617a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2618a13fb1a4SEric Sandeen return 0; 2619a13fb1a4SEric Sandeen } 2620a13fb1a4SEric Sandeen 2621a13fb1a4SEric Sandeen if (readonly) 2622a13fb1a4SEric Sandeen return 1; 2623a13fb1a4SEric Sandeen 2624a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2625a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2626a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2627a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2628a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2629a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2630a13fb1a4SEric Sandeen return 0; 2631a13fb1a4SEric Sandeen } 2632a13fb1a4SEric Sandeen /* 2633a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2634a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2635a13fb1a4SEric Sandeen */ 2636a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2637a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2638a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2639a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2640a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2641a13fb1a4SEric Sandeen return 0; 2642a13fb1a4SEric Sandeen } 2643a13fb1a4SEric Sandeen } 2644a13fb1a4SEric Sandeen return 1; 2645a13fb1a4SEric Sandeen } 2646a13fb1a4SEric Sandeen 264766e61a9eSTheodore Ts'o /* 264866e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 264966e61a9eSTheodore Ts'o * on the file system 265066e61a9eSTheodore Ts'o */ 265166e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 265266e61a9eSTheodore Ts'o { 265366e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 265466e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 265566e61a9eSTheodore Ts'o struct ext4_super_block *es; 265666e61a9eSTheodore Ts'o 265766e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 265866e61a9eSTheodore Ts'o es = sbi->s_es; 265966e61a9eSTheodore Ts'o 266066e61a9eSTheodore Ts'o if (es->s_error_count) 266166e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 266266e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 266366e61a9eSTheodore Ts'o if (es->s_first_error_time) { 266466e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 266566e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 266666e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 266766e61a9eSTheodore Ts'o es->s_first_error_func, 266866e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 266966e61a9eSTheodore Ts'o if (es->s_first_error_ino) 267066e61a9eSTheodore Ts'o printk(": inode %u", 267166e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 267266e61a9eSTheodore Ts'o if (es->s_first_error_block) 267366e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 267466e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 267566e61a9eSTheodore Ts'o printk("\n"); 267666e61a9eSTheodore Ts'o } 267766e61a9eSTheodore Ts'o if (es->s_last_error_time) { 267866e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 267966e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 268066e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 268166e61a9eSTheodore Ts'o es->s_last_error_func, 268266e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 268366e61a9eSTheodore Ts'o if (es->s_last_error_ino) 268466e61a9eSTheodore Ts'o printk(": inode %u", 268566e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 268666e61a9eSTheodore Ts'o if (es->s_last_error_block) 268766e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 268866e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 268966e61a9eSTheodore Ts'o printk("\n"); 269066e61a9eSTheodore Ts'o } 269166e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 269266e61a9eSTheodore Ts'o } 269366e61a9eSTheodore Ts'o 2694bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2695bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2696bfff6873SLukas Czerner { 2697bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2698bfff6873SLukas Czerner ext4_group_t group, ngroups; 2699bfff6873SLukas Czerner struct super_block *sb; 2700bfff6873SLukas Czerner unsigned long timeout = 0; 2701bfff6873SLukas Czerner int ret = 0; 2702bfff6873SLukas Czerner 2703bfff6873SLukas Czerner sb = elr->lr_super; 2704bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2705bfff6873SLukas Czerner 2706bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2707bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2708bfff6873SLukas Czerner if (!gdp) { 2709bfff6873SLukas Czerner ret = 1; 2710bfff6873SLukas Czerner break; 2711bfff6873SLukas Czerner } 2712bfff6873SLukas Czerner 2713bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2714bfff6873SLukas Czerner break; 2715bfff6873SLukas Czerner } 2716bfff6873SLukas Czerner 2717bfff6873SLukas Czerner if (group == ngroups) 2718bfff6873SLukas Czerner ret = 1; 2719bfff6873SLukas Czerner 2720bfff6873SLukas Czerner if (!ret) { 2721bfff6873SLukas Czerner timeout = jiffies; 2722bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2723bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2724bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 272551ce6511SLukas Czerner timeout = (jiffies - timeout) * 272651ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2727bfff6873SLukas Czerner elr->lr_timeout = timeout; 2728bfff6873SLukas Czerner } 2729bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2730bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2731bfff6873SLukas Czerner } 2732bfff6873SLukas Czerner 2733bfff6873SLukas Czerner return ret; 2734bfff6873SLukas Czerner } 2735bfff6873SLukas Czerner 2736bfff6873SLukas Czerner /* 2737bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 27384ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2739bfff6873SLukas Czerner */ 2740bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2741bfff6873SLukas Czerner { 2742bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2743bfff6873SLukas Czerner 2744bfff6873SLukas Czerner if (!elr) 2745bfff6873SLukas Czerner return; 2746bfff6873SLukas Czerner 2747bfff6873SLukas Czerner sbi = elr->lr_sbi; 2748bfff6873SLukas Czerner 2749bfff6873SLukas Czerner list_del(&elr->lr_request); 2750bfff6873SLukas Czerner sbi->s_li_request = NULL; 2751bfff6873SLukas Czerner kfree(elr); 2752bfff6873SLukas Czerner } 2753bfff6873SLukas Czerner 2754bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2755bfff6873SLukas Czerner { 27561bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 27571bb933fbSLukas Czerner if (!ext4_li_info) { 27581bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2759bfff6873SLukas Czerner return; 27601bb933fbSLukas Czerner } 2761bfff6873SLukas Czerner 2762bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 27631bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2764bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 27651bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2766bfff6873SLukas Czerner } 2767bfff6873SLukas Czerner 27688f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 27698f1f7453SEric Sandeen 2770bfff6873SLukas Czerner /* 2771bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2772bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2773bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2774bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2775bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2776bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2777bfff6873SLukas Czerner * next waking time and put itself into sleep. 2778bfff6873SLukas Czerner */ 2779bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2780bfff6873SLukas Czerner { 2781bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2782bfff6873SLukas Czerner struct list_head *pos, *n; 2783bfff6873SLukas Czerner struct ext4_li_request *elr; 27844ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2785bfff6873SLukas Czerner 2786bfff6873SLukas Czerner BUG_ON(NULL == eli); 2787bfff6873SLukas Czerner 2788bfff6873SLukas Czerner cont_thread: 2789bfff6873SLukas Czerner while (true) { 2790bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2791bfff6873SLukas Czerner 2792bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2793bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2794bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2795bfff6873SLukas Czerner goto exit_thread; 2796bfff6873SLukas Czerner } 2797bfff6873SLukas Czerner 2798bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2799bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2800bfff6873SLukas Czerner lr_request); 2801bfff6873SLukas Czerner 2802b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2803b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2804b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2805bfff6873SLukas Czerner ext4_remove_li_request(elr); 2806bfff6873SLukas Czerner continue; 2807bfff6873SLukas Czerner } 2808b2c78cd0STheodore Ts'o } 2809bfff6873SLukas Czerner 2810bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2811bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2812bfff6873SLukas Czerner } 2813bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2814bfff6873SLukas Czerner 2815bfff6873SLukas Czerner if (freezing(current)) 2816bfff6873SLukas Czerner refrigerator(); 2817bfff6873SLukas Czerner 28184ed5c033SLukas Czerner cur = jiffies; 28194ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2820f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2821bfff6873SLukas Czerner cond_resched(); 2822bfff6873SLukas Czerner continue; 2823bfff6873SLukas Czerner } 2824bfff6873SLukas Czerner 28254ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 28264ed5c033SLukas Czerner 28278f1f7453SEric Sandeen if (kthread_should_stop()) { 28288f1f7453SEric Sandeen ext4_clear_request_list(); 28298f1f7453SEric Sandeen goto exit_thread; 28308f1f7453SEric Sandeen } 2831bfff6873SLukas Czerner } 2832bfff6873SLukas Czerner 2833bfff6873SLukas Czerner exit_thread: 2834bfff6873SLukas Czerner /* 2835bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2836bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2837bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2838bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2839bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2840bfff6873SLukas Czerner * new one. 2841bfff6873SLukas Czerner */ 2842bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2843bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2844bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2845bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2846bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2847bfff6873SLukas Czerner goto cont_thread; 2848bfff6873SLukas Czerner } 2849bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2850bfff6873SLukas Czerner kfree(ext4_li_info); 2851bfff6873SLukas Czerner ext4_li_info = NULL; 2852bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2853bfff6873SLukas Czerner 2854bfff6873SLukas Czerner return 0; 2855bfff6873SLukas Czerner } 2856bfff6873SLukas Czerner 2857bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2858bfff6873SLukas Czerner { 2859bfff6873SLukas Czerner struct list_head *pos, *n; 2860bfff6873SLukas Czerner struct ext4_li_request *elr; 2861bfff6873SLukas Czerner 2862bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2863bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 2864bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2865bfff6873SLukas Czerner lr_request); 2866bfff6873SLukas Czerner ext4_remove_li_request(elr); 2867bfff6873SLukas Czerner } 2868bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2869bfff6873SLukas Czerner } 2870bfff6873SLukas Czerner 2871bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 2872bfff6873SLukas Czerner { 28738f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 28748f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 28758f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 28768f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 2877bfff6873SLukas Czerner ext4_clear_request_list(); 2878bfff6873SLukas Czerner kfree(ext4_li_info); 2879bfff6873SLukas Czerner ext4_li_info = NULL; 2880bfff6873SLukas Czerner printk(KERN_CRIT "EXT4: error %d creating inode table " 2881bfff6873SLukas Czerner "initialization thread\n", 2882bfff6873SLukas Czerner err); 2883bfff6873SLukas Czerner return err; 2884bfff6873SLukas Czerner } 2885bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 2886bfff6873SLukas Czerner return 0; 2887bfff6873SLukas Czerner } 2888bfff6873SLukas Czerner 2889bfff6873SLukas Czerner /* 2890bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 2891bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 2892bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 2893bfff6873SLukas Czerner * groups and return total number of groups. 2894bfff6873SLukas Czerner */ 2895bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 2896bfff6873SLukas Czerner { 2897bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 2898bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2899bfff6873SLukas Czerner 2900bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 2901bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2902bfff6873SLukas Czerner if (!gdp) 2903bfff6873SLukas Czerner continue; 2904bfff6873SLukas Czerner 2905bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2906bfff6873SLukas Czerner break; 2907bfff6873SLukas Czerner } 2908bfff6873SLukas Czerner 2909bfff6873SLukas Czerner return group; 2910bfff6873SLukas Czerner } 2911bfff6873SLukas Czerner 2912bfff6873SLukas Czerner static int ext4_li_info_new(void) 2913bfff6873SLukas Czerner { 2914bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 2915bfff6873SLukas Czerner 2916bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 2917bfff6873SLukas Czerner if (!eli) 2918bfff6873SLukas Czerner return -ENOMEM; 2919bfff6873SLukas Czerner 2920bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 2921bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 2922bfff6873SLukas Czerner 2923bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 2924bfff6873SLukas Czerner 2925bfff6873SLukas Czerner ext4_li_info = eli; 2926bfff6873SLukas Czerner 2927bfff6873SLukas Czerner return 0; 2928bfff6873SLukas Czerner } 2929bfff6873SLukas Czerner 2930bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 2931bfff6873SLukas Czerner ext4_group_t start) 2932bfff6873SLukas Czerner { 2933bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2934bfff6873SLukas Czerner struct ext4_li_request *elr; 2935bfff6873SLukas Czerner unsigned long rnd; 2936bfff6873SLukas Czerner 2937bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 2938bfff6873SLukas Czerner if (!elr) 2939bfff6873SLukas Czerner return NULL; 2940bfff6873SLukas Czerner 2941bfff6873SLukas Czerner elr->lr_super = sb; 2942bfff6873SLukas Czerner elr->lr_sbi = sbi; 2943bfff6873SLukas Czerner elr->lr_next_group = start; 2944bfff6873SLukas Czerner 2945bfff6873SLukas Czerner /* 2946bfff6873SLukas Czerner * Randomize first schedule time of the request to 2947bfff6873SLukas Czerner * spread the inode table initialization requests 2948bfff6873SLukas Czerner * better. 2949bfff6873SLukas Czerner */ 2950bfff6873SLukas Czerner get_random_bytes(&rnd, sizeof(rnd)); 2951bfff6873SLukas Czerner elr->lr_next_sched = jiffies + (unsigned long)rnd % 2952bfff6873SLukas Czerner (EXT4_DEF_LI_MAX_START_DELAY * HZ); 2953bfff6873SLukas Czerner 2954bfff6873SLukas Czerner return elr; 2955bfff6873SLukas Czerner } 2956bfff6873SLukas Czerner 2957bfff6873SLukas Czerner static int ext4_register_li_request(struct super_block *sb, 2958bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 2959bfff6873SLukas Czerner { 2960bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 2961bfff6873SLukas Czerner struct ext4_li_request *elr; 2962bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 29636c5a6cb9SAndrew Morton int ret = 0; 2964bfff6873SLukas Czerner 296551ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 296651ce6511SLukas Czerner /* 296751ce6511SLukas Czerner * Reset timeout so it can be computed again, because 296851ce6511SLukas Czerner * s_li_wait_mult might have changed. 296951ce6511SLukas Czerner */ 297051ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 2971beed5ecbSNicolas Kaiser return 0; 297251ce6511SLukas Czerner } 2973bfff6873SLukas Czerner 2974bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 2975bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 297655ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 2977beed5ecbSNicolas Kaiser return 0; 2978bfff6873SLukas Czerner 2979bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 2980beed5ecbSNicolas Kaiser if (!elr) 2981beed5ecbSNicolas Kaiser return -ENOMEM; 2982bfff6873SLukas Czerner 2983bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2984bfff6873SLukas Czerner 2985bfff6873SLukas Czerner if (NULL == ext4_li_info) { 2986bfff6873SLukas Czerner ret = ext4_li_info_new(); 2987bfff6873SLukas Czerner if (ret) 2988bfff6873SLukas Czerner goto out; 2989bfff6873SLukas Czerner } 2990bfff6873SLukas Czerner 2991bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2992bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 2993bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 2994bfff6873SLukas Czerner 2995bfff6873SLukas Czerner sbi->s_li_request = elr; 299646e4690bSTao Ma /* 299746e4690bSTao Ma * set elr to NULL here since it has been inserted to 299846e4690bSTao Ma * the request_list and the removal and free of it is 299946e4690bSTao Ma * handled by ext4_clear_request_list from now on. 300046e4690bSTao Ma */ 300146e4690bSTao Ma elr = NULL; 3002bfff6873SLukas Czerner 3003bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3004bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3005bfff6873SLukas Czerner if (ret) 3006bfff6873SLukas Czerner goto out; 3007bfff6873SLukas Czerner } 3008bfff6873SLukas Czerner out: 3009bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3010beed5ecbSNicolas Kaiser if (ret) 3011bfff6873SLukas Czerner kfree(elr); 3012bfff6873SLukas Czerner return ret; 3013bfff6873SLukas Czerner } 3014bfff6873SLukas Czerner 3015bfff6873SLukas Czerner /* 3016bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3017bfff6873SLukas Czerner * module unload. 3018bfff6873SLukas Czerner */ 3019bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3020bfff6873SLukas Czerner { 3021bfff6873SLukas Czerner /* 3022bfff6873SLukas Czerner * If thread exited earlier 3023bfff6873SLukas Czerner * there's nothing to be done. 3024bfff6873SLukas Czerner */ 30258f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3026bfff6873SLukas Czerner return; 3027bfff6873SLukas Czerner 30288f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3029bfff6873SLukas Czerner } 3030bfff6873SLukas Czerner 3031617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 30327477827fSAneesh Kumar K.V __releases(kernel_lock) 30337477827fSAneesh Kumar K.V __acquires(kernel_lock) 3034ac27a0ecSDave Kleikamp { 3035d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3036ac27a0ecSDave Kleikamp struct buffer_head *bh; 3037617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3038617ba13bSMingming Cao struct ext4_sb_info *sbi; 3039617ba13bSMingming Cao ext4_fsblk_t block; 3040617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 304170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3042ac27a0ecSDave Kleikamp unsigned long offset = 0; 3043ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3044ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3045ac27a0ecSDave Kleikamp struct inode *root; 30469f6200bbSTheodore Ts'o char *cp; 30470390131bSFrank Mayhar const char *descr; 3048dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3049ac27a0ecSDave Kleikamp int blocksize; 30504ec11028STheodore Ts'o unsigned int db_count; 30514ec11028STheodore Ts'o unsigned int i; 3052f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 3053bd81d8eeSLaurent Vivier __u64 blocks_count; 3054833f4077SPeter Zijlstra int err; 3055b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3056bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3057ac27a0ecSDave Kleikamp 3058ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3059ac27a0ecSDave Kleikamp if (!sbi) 3060dcc7dae3SCyrill Gorcunov goto out_free_orig; 3061705895b6SPekka Enberg 3062705895b6SPekka Enberg sbi->s_blockgroup_lock = 3063705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3064705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3065705895b6SPekka Enberg kfree(sbi); 3066dcc7dae3SCyrill Gorcunov goto out_free_orig; 3067705895b6SPekka Enberg } 3068ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 3069ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 3070617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 3071617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 3072240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3073d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3074f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3075f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3076f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3077ac27a0ecSDave Kleikamp 30789f6200bbSTheodore Ts'o /* Cleanup superblock name */ 30799f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 30809f6200bbSTheodore Ts'o *cp = '!'; 30819f6200bbSTheodore Ts'o 3082dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3083617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3084ac27a0ecSDave Kleikamp if (!blocksize) { 3085b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3086ac27a0ecSDave Kleikamp goto out_fail; 3087ac27a0ecSDave Kleikamp } 3088ac27a0ecSDave Kleikamp 3089ac27a0ecSDave Kleikamp /* 3090617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3091ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3092ac27a0ecSDave Kleikamp */ 3093617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 309470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 309570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3096ac27a0ecSDave Kleikamp } else { 309770bbb3e0SAndrew Morton logical_sb_block = sb_block; 3098ac27a0ecSDave Kleikamp } 3099ac27a0ecSDave Kleikamp 310070bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3101b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3102ac27a0ecSDave Kleikamp goto out_fail; 3103ac27a0ecSDave Kleikamp } 3104ac27a0ecSDave Kleikamp /* 3105ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3106617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3107ac27a0ecSDave Kleikamp */ 3108617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3109ac27a0ecSDave Kleikamp sbi->s_es = es; 3110ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3111617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3112617ba13bSMingming Cao goto cantfind_ext4; 3113afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3114ac27a0ecSDave Kleikamp 3115ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3116ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3117fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3118617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3119fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 3120437ca0fdSDmitry Monakhov if (def_mount_opts & EXT4_DEFM_BSDGROUPS) { 3121437ca0fdSDmitry Monakhov ext4_msg(sb, KERN_WARNING, deprecated_msg, "bsdgroups", 3122437ca0fdSDmitry Monakhov "2.6.38"); 3123fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3124437ca0fdSDmitry Monakhov } 3125617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3126fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3127ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 312803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 3129fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 31302e7842b8SHugh Dickins #endif 313103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3132fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 31332e7842b8SHugh Dickins #endif 31346fd7a467STheodore Ts'o set_opt(sb, MBLK_IO_SUBMIT); 3135617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3136fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3137617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3138fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3139617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3140fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3141ac27a0ecSDave Kleikamp 3142617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3143fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3144bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3145fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3146bb4f397aSAneesh Kumar K.V else 3147fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 31488b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3149fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 31508b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3151fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3152ac27a0ecSDave Kleikamp 3153ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 3154ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 315530773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 315630773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 315730773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3158ac27a0ecSDave Kleikamp 31598b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3160fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3161ac27a0ecSDave Kleikamp 31621e2462f9SMingming Cao /* 3163dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3164dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3165dd919b98SAneesh Kumar K.V */ 31668b67f04aSTheodore Ts'o if (!IS_EXT3_SB(sb) && 31678b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3168fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3169dd919b98SAneesh Kumar K.V 317051ce6511SLukas Czerner /* 317151ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 317251ce6511SLukas Czerner * no mount option specified. 317351ce6511SLukas Czerner */ 317451ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 317551ce6511SLukas Czerner 31768b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 31778b67f04aSTheodore Ts'o &journal_devnum, &journal_ioprio, NULL, 0)) { 31788b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 31798b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 31808b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 31818b67f04aSTheodore Ts'o } 3182b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3183b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 3184ac27a0ecSDave Kleikamp goto failed_mount; 3185ac27a0ecSDave Kleikamp 3186ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3187482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3188ac27a0ecSDave Kleikamp 3189617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3190617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3191617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3192617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3193b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3194b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3195b31e1552SEric Sandeen "running e2fsck is recommended"); 3196469108ffSTheodore Tso 31972035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 31982035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 31992035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 32002035e776STheodore Ts'o "using the ext4 subsystem"); 32012035e776STheodore Ts'o else { 32022035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 32032035e776STheodore Ts'o "to feature incompatibilities"); 32042035e776STheodore Ts'o goto failed_mount; 32052035e776STheodore Ts'o } 32062035e776STheodore Ts'o } 32072035e776STheodore Ts'o 32082035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 32092035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 32102035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 32112035e776STheodore Ts'o "using the ext4 subsystem"); 32122035e776STheodore Ts'o else { 32132035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 32142035e776STheodore Ts'o "to feature incompatibilities"); 32152035e776STheodore Ts'o goto failed_mount; 32162035e776STheodore Ts'o } 32172035e776STheodore Ts'o } 32182035e776STheodore Ts'o 3219469108ffSTheodore Tso /* 3220ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3221ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3222ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3223ac27a0ecSDave Kleikamp */ 3224a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3225ac27a0ecSDave Kleikamp goto failed_mount; 3226a13fb1a4SEric Sandeen 3227ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3228ac27a0ecSDave Kleikamp 3229617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3230617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3231b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3232b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3233ac27a0ecSDave Kleikamp goto failed_mount; 3234ac27a0ecSDave Kleikamp } 3235ac27a0ecSDave Kleikamp 3236ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3237ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3238ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3239b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3240ce40733cSAneesh Kumar K.V blocksize); 3241ac27a0ecSDave Kleikamp goto failed_mount; 3242ac27a0ecSDave Kleikamp } 3243ac27a0ecSDave Kleikamp 3244ac27a0ecSDave Kleikamp brelse(bh); 324570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 324670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 324770bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3248ac27a0ecSDave Kleikamp if (!bh) { 3249b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3250b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3251ac27a0ecSDave Kleikamp goto failed_mount; 3252ac27a0ecSDave Kleikamp } 3253617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 3254ac27a0ecSDave Kleikamp sbi->s_es = es; 3255617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3257b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3258ac27a0ecSDave Kleikamp goto failed_mount; 3259ac27a0ecSDave Kleikamp } 3260ac27a0ecSDave Kleikamp } 3261ac27a0ecSDave Kleikamp 3262a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3263a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3264f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3265f287a1a5STheodore Ts'o has_huge_files); 3266f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3267ac27a0ecSDave Kleikamp 3268617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3269617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3270617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3271ac27a0ecSDave Kleikamp } else { 3272ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3273ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3274617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 32751330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3276ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3277b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3278b31e1552SEric Sandeen "unsupported inode size: %d", 3279ac27a0ecSDave Kleikamp sbi->s_inode_size); 3280ac27a0ecSDave Kleikamp goto failed_mount; 3281ac27a0ecSDave Kleikamp } 3282ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3283ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3284ac27a0ecSDave Kleikamp } 32850b8e58a1SAndreas Dilger 32860d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 32870d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 32888fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 32890d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3290d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3291b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3292b31e1552SEric Sandeen "unsupported descriptor size %lu", 32930d1ee42fSAlexandre Ratchov sbi->s_desc_size); 32940d1ee42fSAlexandre Ratchov goto failed_mount; 32950d1ee42fSAlexandre Ratchov } 32960d1ee42fSAlexandre Ratchov } else 32970d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 32980b8e58a1SAndreas Dilger 3299ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3300ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3301b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3302617ba13bSMingming Cao goto cantfind_ext4; 33030b8e58a1SAndreas Dilger 3304617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3305ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3306617ba13bSMingming Cao goto cantfind_ext4; 3307ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3308ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 33090d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3310ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3311ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3312e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3313e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 33140b8e58a1SAndreas Dilger 3315ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3316ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3317ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3318f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3319f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3320f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3321f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3322f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3323f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3324f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3325f99b2589STheodore Ts'o #else 3326f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3327f99b2589STheodore Ts'o #endif 3328f99b2589STheodore Ts'o sb->s_dirt = 1; 3329f99b2589STheodore Ts'o } 3330ac27a0ecSDave Kleikamp 3331ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3332b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3333b31e1552SEric Sandeen "#blocks per group too big: %lu", 3334ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3335ac27a0ecSDave Kleikamp goto failed_mount; 3336ac27a0ecSDave Kleikamp } 3337ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3338b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3339b31e1552SEric Sandeen "#inodes per group too big: %lu", 3340ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3341ac27a0ecSDave Kleikamp goto failed_mount; 3342ac27a0ecSDave Kleikamp } 3343ac27a0ecSDave Kleikamp 3344bf43d84bSEric Sandeen /* 3345bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3346bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3347bf43d84bSEric Sandeen */ 33485a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 334930ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 33505a9ae68aSDarrick J. Wong if (err) { 3351b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3352bf43d84bSEric Sandeen " too large to mount safely on this system"); 3353ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 335490c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 33555a9ae68aSDarrick J. Wong ret = err; 3356ac27a0ecSDave Kleikamp goto failed_mount; 3357ac27a0ecSDave Kleikamp } 3358ac27a0ecSDave Kleikamp 3359617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3360617ba13bSMingming Cao goto cantfind_ext4; 3361e7c95593SEric Sandeen 33620f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 33630f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 33640f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3365b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3366b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 33670f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 33680f2ddca6SFrom: Thiemo Nagel goto failed_mount; 33690f2ddca6SFrom: Thiemo Nagel } 33700f2ddca6SFrom: Thiemo Nagel 33714ec11028STheodore Ts'o /* 33724ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 33734ec11028STheodore Ts'o * of the filesystem. 33744ec11028STheodore Ts'o */ 33754ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3376b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 3377b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3378e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 33794ec11028STheodore Ts'o ext4_blocks_count(es)); 3380e7c95593SEric Sandeen goto failed_mount; 3381e7c95593SEric Sandeen } 3382bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3383bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3384bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3385bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 33864ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3387b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 33884ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3389b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 33904ec11028STheodore Ts'o ext4_blocks_count(es), 33914ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 33924ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 33934ec11028STheodore Ts'o goto failed_mount; 33944ec11028STheodore Ts'o } 3395bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3396fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3397fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3398617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3399617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3400ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 3401ac27a0ecSDave Kleikamp GFP_KERNEL); 3402ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3403b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 3404ac27a0ecSDave Kleikamp goto failed_mount; 3405ac27a0ecSDave Kleikamp } 3406ac27a0ecSDave Kleikamp 34073244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 34089f6200bbSTheodore Ts'o if (ext4_proc_root) 34099f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 34103244fcb1SAlexander Beregalov #endif 3411240799cdSTheodore Ts'o 3412705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3413ac27a0ecSDave Kleikamp 3414ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 341570bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3416ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3417ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3418b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3419b31e1552SEric Sandeen "can't read group descriptor %d", i); 3420ac27a0ecSDave Kleikamp db_count = i; 3421ac27a0ecSDave Kleikamp goto failed_mount2; 3422ac27a0ecSDave Kleikamp } 3423ac27a0ecSDave Kleikamp } 3424bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3425b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3426ac27a0ecSDave Kleikamp goto failed_mount2; 3427ac27a0ecSDave Kleikamp } 3428772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3429772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3430b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3431b31e1552SEric Sandeen "unable to initialize " 3432b31e1552SEric Sandeen "flex_bg meta info!"); 3433772cb7c8SJose R. Santos goto failed_mount2; 3434772cb7c8SJose R. Santos } 3435772cb7c8SJose R. Santos 3436ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3437ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3438ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3439ac27a0ecSDave Kleikamp 344004496411STao Ma init_timer(&sbi->s_err_report); 344104496411STao Ma sbi->s_err_report.function = print_daily_error_info; 344204496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 344304496411STao Ma 3444ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeblocks_counter, 3445ce7e010aSTheodore Ts'o ext4_count_free_blocks(sb)); 3446ce7e010aSTheodore Ts'o if (!err) { 3447ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3448ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3449ce7e010aSTheodore Ts'o } 3450ce7e010aSTheodore Ts'o if (!err) { 3451ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3452ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3453ce7e010aSTheodore Ts'o } 3454ce7e010aSTheodore Ts'o if (!err) { 3455ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 3456ce7e010aSTheodore Ts'o } 3457ce7e010aSTheodore Ts'o if (err) { 3458ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3459ce7e010aSTheodore Ts'o goto failed_mount3; 3460ce7e010aSTheodore Ts'o } 3461ce7e010aSTheodore Ts'o 3462c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 346355138e0bSTheodore Ts'o sbi->s_max_writeback_mb_bump = 128; 3464c9de560dSAlex Tomas 3465ac27a0ecSDave Kleikamp /* 3466ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3467ac27a0ecSDave Kleikamp */ 34689ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 34699ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3470617ba13bSMingming Cao sb->s_op = &ext4_sops; 34719ca92389STheodore Ts'o else 34729ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3473617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3474617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3475ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3476617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 3477617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3478ac27a0ecSDave Kleikamp #endif 3479f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3480f2fa2ffcSAneesh Kumar K.V 3481ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 34823b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 348332ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 3484ac27a0ecSDave Kleikamp 3485ac27a0ecSDave Kleikamp sb->s_root = NULL; 3486ac27a0ecSDave Kleikamp 3487ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3488617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3489617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3490ac27a0ecSDave Kleikamp 3491*c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3492*c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3493*c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3494*c5e06d10SJohann Lombardi goto failed_mount3; 3495*c5e06d10SJohann Lombardi 3496ac27a0ecSDave Kleikamp /* 3497ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3498ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3499ac27a0ecSDave Kleikamp */ 3500ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3501617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3502617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3503ac27a0ecSDave Kleikamp goto failed_mount3; 35040390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 35050390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3506b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3507b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3508744692dcSJiaying Zhang goto failed_mount_wq; 3509ac27a0ecSDave Kleikamp } else { 3510fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 35110390131bSFrank Mayhar sbi->s_journal = NULL; 35120390131bSFrank Mayhar needs_recovery = 0; 35130390131bSFrank Mayhar goto no_journal; 3514ac27a0ecSDave Kleikamp } 3515ac27a0ecSDave Kleikamp 3516eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 3517eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3518eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3519b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3520744692dcSJiaying Zhang goto failed_mount_wq; 3521eb40a09cSJose R. Santos } 3522eb40a09cSJose R. Santos 3523d4da6c9cSLinus Torvalds if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 3524d4da6c9cSLinus Torvalds jbd2_journal_set_features(sbi->s_journal, 3525d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3526d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3527d4da6c9cSLinus Torvalds } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 3528818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 3529818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 3530818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 3531818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3532d4da6c9cSLinus Torvalds } else { 3533d4da6c9cSLinus Torvalds jbd2_journal_clear_features(sbi->s_journal, 3534d4da6c9cSLinus Torvalds JBD2_FEATURE_COMPAT_CHECKSUM, 0, 3535d4da6c9cSLinus Torvalds JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 3536d4da6c9cSLinus Torvalds } 3537818d276cSGirish Shilamkar 3538ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3539ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3540ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3541ac27a0ecSDave Kleikamp case 0: 3542ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 354363f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 354463f57933SAndrew Morton * cope, else JOURNAL_DATA 354563f57933SAndrew Morton */ 3546dab291afSMingming Cao if (jbd2_journal_check_available_features 3547dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3548fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3549ac27a0ecSDave Kleikamp else 3550fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3551ac27a0ecSDave Kleikamp break; 3552ac27a0ecSDave Kleikamp 3553617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3554617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3555dab291afSMingming Cao if (!jbd2_journal_check_available_features 3556dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3557b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3558b31e1552SEric Sandeen "requested data journaling mode"); 3559744692dcSJiaying Zhang goto failed_mount_wq; 3560ac27a0ecSDave Kleikamp } 3561ac27a0ecSDave Kleikamp default: 3562ac27a0ecSDave Kleikamp break; 3563ac27a0ecSDave Kleikamp } 3564b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3565ac27a0ecSDave Kleikamp 3566ce7e010aSTheodore Ts'o /* 3567ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3568ce7e010aSTheodore Ts'o * need to update the global counters. 3569ce7e010aSTheodore Ts'o */ 3570ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeblocks_counter, 357184061e07SDmitry Monakhov ext4_count_free_blocks(sb)); 3572ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 357384061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 3574ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 357584061e07SDmitry Monakhov ext4_count_dirs(sb)); 3576ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirtyblocks_counter, 0); 3577206f7ab4SChristoph Hellwig 3578ce7e010aSTheodore Ts'o no_journal: 3579fd89d5f2STejun Heo /* 3580fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 3581fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 3582fd89d5f2STejun Heo */ 3583fd89d5f2STejun Heo EXT4_SB(sb)->dio_unwritten_wq = 3584ae005cbeSLinus Torvalds alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 35854c0425ffSMingming Cao if (!EXT4_SB(sb)->dio_unwritten_wq) { 35864c0425ffSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n"); 35874c0425ffSMingming Cao goto failed_mount_wq; 35884c0425ffSMingming Cao } 35894c0425ffSMingming Cao 3590ac27a0ecSDave Kleikamp /* 3591dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 3592ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 3593ac27a0ecSDave Kleikamp */ 3594ac27a0ecSDave Kleikamp 35951d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 35961d1fe1eeSDavid Howells if (IS_ERR(root)) { 3597b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 35981d1fe1eeSDavid Howells ret = PTR_ERR(root); 359932a9bb57SManish Katiyar root = NULL; 3600ac27a0ecSDave Kleikamp goto failed_mount4; 3601ac27a0ecSDave Kleikamp } 3602ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 3603b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 3604ac27a0ecSDave Kleikamp goto failed_mount4; 3605ac27a0ecSDave Kleikamp } 36061d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 36071d1fe1eeSDavid Howells if (!sb->s_root) { 3608b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 36091d1fe1eeSDavid Howells ret = -ENOMEM; 36101d1fe1eeSDavid Howells goto failed_mount4; 36111d1fe1eeSDavid Howells } 3612ac27a0ecSDave Kleikamp 3613617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 3614ef7f3835SKalpak Shah 3615ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 3616ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 3617ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3618ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3619ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3620ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 3621ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3622ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 3623ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3624ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 3625ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 3626ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 3627ef7f3835SKalpak Shah sbi->s_want_extra_isize = 3628ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 3629ef7f3835SKalpak Shah } 3630ef7f3835SKalpak Shah } 3631ef7f3835SKalpak Shah /* Check if enough inode space is available */ 3632ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 3633ef7f3835SKalpak Shah sbi->s_inode_size) { 3634ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 3635ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 3636b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 3637b31e1552SEric Sandeen "available"); 3638ef7f3835SKalpak Shah } 3639ef7f3835SKalpak Shah 364090576c0bSTheodore Ts'o if (test_opt(sb, DELALLOC) && 364190576c0bSTheodore Ts'o (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)) { 3642b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 3643b31e1552SEric Sandeen "requested data journaling mode"); 3644fd8c37ecSTheodore Ts'o clear_opt(sb, DELALLOC); 364590576c0bSTheodore Ts'o } 3646744692dcSJiaying Zhang if (test_opt(sb, DIOREAD_NOLOCK)) { 3647744692dcSJiaying Zhang if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 3648744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3649744692dcSJiaying Zhang "option - requested data journaling mode"); 3650fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3651744692dcSJiaying Zhang } 3652744692dcSJiaying Zhang if (sb->s_blocksize < PAGE_SIZE) { 3653744692dcSJiaying Zhang ext4_msg(sb, KERN_WARNING, "Ignoring dioread_nolock " 3654744692dcSJiaying Zhang "option - block size is too small"); 3655fd8c37ecSTheodore Ts'o clear_opt(sb, DIOREAD_NOLOCK); 3656744692dcSJiaying Zhang } 3657744692dcSJiaying Zhang } 3658c2774d84SAneesh Kumar K.V 36596fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 36606fd058f7STheodore Ts'o if (err) { 3661b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 3662fbe845ddSCurt Wohlgemuth "zone (%d)", err); 36636fd058f7STheodore Ts'o goto failed_mount4; 36646fd058f7STheodore Ts'o } 36656fd058f7STheodore Ts'o 3666c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 3667c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 3668c2774d84SAneesh Kumar K.V if (err) { 3669421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 3670c2774d84SAneesh Kumar K.V err); 3671c2774d84SAneesh Kumar K.V goto failed_mount4; 3672c2774d84SAneesh Kumar K.V } 3673c2774d84SAneesh Kumar K.V 3674bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 3675bfff6873SLukas Czerner if (err) 3676bfff6873SLukas Czerner goto failed_mount4; 3677bfff6873SLukas Czerner 36783197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 36793197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 36803197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 36813197ebdbSTheodore Ts'o "%s", sb->s_id); 36823197ebdbSTheodore Ts'o if (err) { 36833197ebdbSTheodore Ts'o ext4_mb_release(sb); 36843197ebdbSTheodore Ts'o ext4_ext_release(sb); 36853197ebdbSTheodore Ts'o goto failed_mount4; 36863197ebdbSTheodore Ts'o }; 36873197ebdbSTheodore Ts'o 3688617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 3689617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 3690617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 36910390131bSFrank Mayhar if (needs_recovery) { 3692b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 3693617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 36940390131bSFrank Mayhar } 36950390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 36960390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 36970390131bSFrank Mayhar descr = " journalled data mode"; 36980390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 36990390131bSFrank Mayhar descr = " ordered data mode"; 37000390131bSFrank Mayhar else 37010390131bSFrank Mayhar descr = " writeback data mode"; 37020390131bSFrank Mayhar } else 37030390131bSFrank Mayhar descr = "out journal"; 37040390131bSFrank Mayhar 3705d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 37068b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 37078b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 3708ac27a0ecSDave Kleikamp 370966e61a9eSTheodore Ts'o if (es->s_error_count) 371066e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 3711ac27a0ecSDave Kleikamp 3712d4c402d9SCurt Wohlgemuth kfree(orig_data); 3713ac27a0ecSDave Kleikamp return 0; 3714ac27a0ecSDave Kleikamp 3715617ba13bSMingming Cao cantfind_ext4: 3716ac27a0ecSDave Kleikamp if (!silent) 3717b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 3718ac27a0ecSDave Kleikamp goto failed_mount; 3719ac27a0ecSDave Kleikamp 3720ac27a0ecSDave Kleikamp failed_mount4: 372132a9bb57SManish Katiyar iput(root); 372232a9bb57SManish Katiyar sb->s_root = NULL; 3723b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 37244c0425ffSMingming Cao destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq); 37254c0425ffSMingming Cao failed_mount_wq: 37266fd058f7STheodore Ts'o ext4_release_system_zone(sb); 37270390131bSFrank Mayhar if (sbi->s_journal) { 3728dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 372947b4a50bSJan Kara sbi->s_journal = NULL; 37300390131bSFrank Mayhar } 3731ac27a0ecSDave Kleikamp failed_mount3: 373204496411STao Ma del_timer(&sbi->s_err_report); 3733c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 3734c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 3735c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 3736c5ca7c76STheodore Ts'o else 3737c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 3738c5ca7c76STheodore Ts'o } 3739ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeblocks_counter); 3740ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 3741ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 3742ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 3743*c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 3744*c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 3745ac27a0ecSDave Kleikamp failed_mount2: 3746ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 3747ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 3748ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 3749ac27a0ecSDave Kleikamp failed_mount: 3750240799cdSTheodore Ts'o if (sbi->s_proc) { 37519f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 3752240799cdSTheodore Ts'o } 3753ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3754ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3755ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3756ac27a0ecSDave Kleikamp #endif 3757617ba13bSMingming Cao ext4_blkdev_remove(sbi); 3758ac27a0ecSDave Kleikamp brelse(bh); 3759ac27a0ecSDave Kleikamp out_fail: 3760ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 3761f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 3762ac27a0ecSDave Kleikamp kfree(sbi); 3763dcc7dae3SCyrill Gorcunov out_free_orig: 3764d4c402d9SCurt Wohlgemuth kfree(orig_data); 37651d1fe1eeSDavid Howells return ret; 3766ac27a0ecSDave Kleikamp } 3767ac27a0ecSDave Kleikamp 3768ac27a0ecSDave Kleikamp /* 3769ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 3770ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 3771ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 3772ac27a0ecSDave Kleikamp */ 3773617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 3774ac27a0ecSDave Kleikamp { 3775617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3776ac27a0ecSDave Kleikamp 3777ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 377830773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 377930773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 3780ac27a0ecSDave Kleikamp 3781a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 3782ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 3783dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 3784ac27a0ecSDave Kleikamp else 3785dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 37865bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 37875bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 37885bf5683aSHidehiro Kawai else 37895bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 3790a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 3791ac27a0ecSDave Kleikamp } 3792ac27a0ecSDave Kleikamp 3793617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 3794ac27a0ecSDave Kleikamp unsigned int journal_inum) 3795ac27a0ecSDave Kleikamp { 3796ac27a0ecSDave Kleikamp struct inode *journal_inode; 3797ac27a0ecSDave Kleikamp journal_t *journal; 3798ac27a0ecSDave Kleikamp 37990390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38000390131bSFrank Mayhar 3801ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 3802ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 3803ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 3804ac27a0ecSDave Kleikamp 38051d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 38061d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 3807b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 3808ac27a0ecSDave Kleikamp return NULL; 3809ac27a0ecSDave Kleikamp } 3810ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 3811ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 3812ac27a0ecSDave Kleikamp iput(journal_inode); 3813b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 3814ac27a0ecSDave Kleikamp return NULL; 3815ac27a0ecSDave Kleikamp } 3816ac27a0ecSDave Kleikamp 3817e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 3818ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 38191d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 3820b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 3821ac27a0ecSDave Kleikamp iput(journal_inode); 3822ac27a0ecSDave Kleikamp return NULL; 3823ac27a0ecSDave Kleikamp } 3824ac27a0ecSDave Kleikamp 3825dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 3826ac27a0ecSDave Kleikamp if (!journal) { 3827b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 3828ac27a0ecSDave Kleikamp iput(journal_inode); 3829ac27a0ecSDave Kleikamp return NULL; 3830ac27a0ecSDave Kleikamp } 3831ac27a0ecSDave Kleikamp journal->j_private = sb; 3832617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3833ac27a0ecSDave Kleikamp return journal; 3834ac27a0ecSDave Kleikamp } 3835ac27a0ecSDave Kleikamp 3836617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3837ac27a0ecSDave Kleikamp dev_t j_dev) 3838ac27a0ecSDave Kleikamp { 3839ac27a0ecSDave Kleikamp struct buffer_head *bh; 3840ac27a0ecSDave Kleikamp journal_t *journal; 3841617ba13bSMingming Cao ext4_fsblk_t start; 3842617ba13bSMingming Cao ext4_fsblk_t len; 3843ac27a0ecSDave Kleikamp int hblock, blocksize; 3844617ba13bSMingming Cao ext4_fsblk_t sb_block; 3845ac27a0ecSDave Kleikamp unsigned long offset; 3846617ba13bSMingming Cao struct ext4_super_block *es; 3847ac27a0ecSDave Kleikamp struct block_device *bdev; 3848ac27a0ecSDave Kleikamp 38490390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 38500390131bSFrank Mayhar 3851b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3852ac27a0ecSDave Kleikamp if (bdev == NULL) 3853ac27a0ecSDave Kleikamp return NULL; 3854ac27a0ecSDave Kleikamp 3855ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3856e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3857ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3858b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3859b31e1552SEric Sandeen "blocksize too small for journal device"); 3860ac27a0ecSDave Kleikamp goto out_bdev; 3861ac27a0ecSDave Kleikamp } 3862ac27a0ecSDave Kleikamp 3863617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3864617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3865ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3866ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3867b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3868b31e1552SEric Sandeen "external journal"); 3869ac27a0ecSDave Kleikamp goto out_bdev; 3870ac27a0ecSDave Kleikamp } 3871ac27a0ecSDave Kleikamp 3872617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3873617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3874ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3875617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3876b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3877b31e1552SEric Sandeen "bad superblock"); 3878ac27a0ecSDave Kleikamp brelse(bh); 3879ac27a0ecSDave Kleikamp goto out_bdev; 3880ac27a0ecSDave Kleikamp } 3881ac27a0ecSDave Kleikamp 3882617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3883b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3884ac27a0ecSDave Kleikamp brelse(bh); 3885ac27a0ecSDave Kleikamp goto out_bdev; 3886ac27a0ecSDave Kleikamp } 3887ac27a0ecSDave Kleikamp 3888bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3889ac27a0ecSDave Kleikamp start = sb_block + 1; 3890ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3891ac27a0ecSDave Kleikamp 3892dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3893ac27a0ecSDave Kleikamp start, len, blocksize); 3894ac27a0ecSDave Kleikamp if (!journal) { 3895b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3896ac27a0ecSDave Kleikamp goto out_bdev; 3897ac27a0ecSDave Kleikamp } 3898ac27a0ecSDave Kleikamp journal->j_private = sb; 3899ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3900ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3901ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3902b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3903ac27a0ecSDave Kleikamp goto out_journal; 3904ac27a0ecSDave Kleikamp } 3905ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3906b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3907b31e1552SEric Sandeen "user (unsupported) - %d", 3908ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3909ac27a0ecSDave Kleikamp goto out_journal; 3910ac27a0ecSDave Kleikamp } 3911617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3912617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3913ac27a0ecSDave Kleikamp return journal; 39140b8e58a1SAndreas Dilger 3915ac27a0ecSDave Kleikamp out_journal: 3916dab291afSMingming Cao jbd2_journal_destroy(journal); 3917ac27a0ecSDave Kleikamp out_bdev: 3918617ba13bSMingming Cao ext4_blkdev_put(bdev); 3919ac27a0ecSDave Kleikamp return NULL; 3920ac27a0ecSDave Kleikamp } 3921ac27a0ecSDave Kleikamp 3922617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3923617ba13bSMingming Cao struct ext4_super_block *es, 3924ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3925ac27a0ecSDave Kleikamp { 3926ac27a0ecSDave Kleikamp journal_t *journal; 3927ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3928ac27a0ecSDave Kleikamp dev_t journal_dev; 3929ac27a0ecSDave Kleikamp int err = 0; 3930ac27a0ecSDave Kleikamp int really_read_only; 3931ac27a0ecSDave Kleikamp 39320390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 39330390131bSFrank Mayhar 3934ac27a0ecSDave Kleikamp if (journal_devnum && 3935ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3936b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3937b31e1552SEric Sandeen "numbers have changed"); 3938ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3939ac27a0ecSDave Kleikamp } else 3940ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3941ac27a0ecSDave Kleikamp 3942ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3943ac27a0ecSDave Kleikamp 3944ac27a0ecSDave Kleikamp /* 3945ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3946ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3947ac27a0ecSDave Kleikamp * can get read-write access to the device. 3948ac27a0ecSDave Kleikamp */ 3949617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3950ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3951b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3952b31e1552SEric Sandeen "required on readonly filesystem"); 3953ac27a0ecSDave Kleikamp if (really_read_only) { 3954b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3955b31e1552SEric Sandeen "unavailable, cannot proceed"); 3956ac27a0ecSDave Kleikamp return -EROFS; 3957ac27a0ecSDave Kleikamp } 3958b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3959b31e1552SEric Sandeen "be enabled during recovery"); 3960ac27a0ecSDave Kleikamp } 3961ac27a0ecSDave Kleikamp } 3962ac27a0ecSDave Kleikamp 3963ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3964b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3965b31e1552SEric Sandeen "and inode journals!"); 3966ac27a0ecSDave Kleikamp return -EINVAL; 3967ac27a0ecSDave Kleikamp } 3968ac27a0ecSDave Kleikamp 3969ac27a0ecSDave Kleikamp if (journal_inum) { 3970617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3971ac27a0ecSDave Kleikamp return -EINVAL; 3972ac27a0ecSDave Kleikamp } else { 3973617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3974ac27a0ecSDave Kleikamp return -EINVAL; 3975ac27a0ecSDave Kleikamp } 3976ac27a0ecSDave Kleikamp 397790576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 3978b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 39794776004fSTheodore Ts'o 3980ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3981dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3982ac27a0ecSDave Kleikamp if (err) { 3983b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3984dab291afSMingming Cao jbd2_journal_destroy(journal); 3985ac27a0ecSDave Kleikamp return err; 3986ac27a0ecSDave Kleikamp } 3987ac27a0ecSDave Kleikamp } 3988ac27a0ecSDave Kleikamp 3989617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3990dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 39911c13d5c0STheodore Ts'o if (!err) { 39921c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 39931c13d5c0STheodore Ts'o if (save) 39941c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 39951c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 3996dab291afSMingming Cao err = jbd2_journal_load(journal); 39971c13d5c0STheodore Ts'o if (save) 39981c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 39991c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 40001c13d5c0STheodore Ts'o kfree(save); 40011c13d5c0STheodore Ts'o } 4002ac27a0ecSDave Kleikamp 4003ac27a0ecSDave Kleikamp if (err) { 4004b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4005dab291afSMingming Cao jbd2_journal_destroy(journal); 4006ac27a0ecSDave Kleikamp return err; 4007ac27a0ecSDave Kleikamp } 4008ac27a0ecSDave Kleikamp 4009617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4010617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4011ac27a0ecSDave Kleikamp 4012c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4013ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4014ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4015ac27a0ecSDave Kleikamp 4016ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4017e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4018ac27a0ecSDave Kleikamp } 4019ac27a0ecSDave Kleikamp 4020ac27a0ecSDave Kleikamp return 0; 4021ac27a0ecSDave Kleikamp } 4022ac27a0ecSDave Kleikamp 4023e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4024ac27a0ecSDave Kleikamp { 4025e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4026617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4027c4be0c1dSTakashi Sato int error = 0; 4028ac27a0ecSDave Kleikamp 4029ac27a0ecSDave Kleikamp if (!sbh) 4030c4be0c1dSTakashi Sato return error; 4031914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4032914258bfSTheodore Ts'o /* 4033914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4034914258bfSTheodore Ts'o * superblock failed. This could happen because the 4035914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4036914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4037914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4038914258bfSTheodore Ts'o * write and hope for the best. 4039914258bfSTheodore Ts'o */ 4040b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4041b31e1552SEric Sandeen "superblock detected"); 4042914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4043914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4044914258bfSTheodore Ts'o } 404571290b36STheodore Ts'o /* 404671290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 404771290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 404871290b36STheodore Ts'o * write time when we are mounting the root file system 404971290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 405071290b36STheodore Ts'o * for people who are east of GMT and who make their clock 405171290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 405271290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 405371290b36STheodore Ts'o * to complain and force a full file system check. 405471290b36STheodore Ts'o */ 405571290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4056ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4057f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4058afc32f7eSTheodore Ts'o es->s_kbytes_written = 4059afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4060afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4061afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4062f613dfcbSTheodore Ts'o else 4063f613dfcbSTheodore Ts'o es->s_kbytes_written = 4064f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 40655d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 40665d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 40677f93cff9STheodore Ts'o es->s_free_inodes_count = 40687f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 40695d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 40707234ab2aSTheodore Ts'o sb->s_dirt = 0; 4071ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 4072ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4073914258bfSTheodore Ts'o if (sync) { 4074c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4075c4be0c1dSTakashi Sato if (error) 4076c4be0c1dSTakashi Sato return error; 4077c4be0c1dSTakashi Sato 4078c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4079c4be0c1dSTakashi Sato if (error) { 4080b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4081b31e1552SEric Sandeen "superblock"); 4082914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4083914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4084914258bfSTheodore Ts'o } 4085914258bfSTheodore Ts'o } 4086c4be0c1dSTakashi Sato return error; 4087ac27a0ecSDave Kleikamp } 4088ac27a0ecSDave Kleikamp 4089ac27a0ecSDave Kleikamp /* 4090ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4091ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4092ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4093ac27a0ecSDave Kleikamp */ 4094617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4095617ba13bSMingming Cao struct ext4_super_block *es) 4096ac27a0ecSDave Kleikamp { 4097617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4098ac27a0ecSDave Kleikamp 40990390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 41000390131bSFrank Mayhar BUG_ON(journal != NULL); 41010390131bSFrank Mayhar return; 41020390131bSFrank Mayhar } 4103dab291afSMingming Cao jbd2_journal_lock_updates(journal); 41047ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 41057ffe1ea8SHidehiro Kawai goto out; 41067ffe1ea8SHidehiro Kawai 4107617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4108ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4109617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4110e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4111ac27a0ecSDave Kleikamp } 41127ffe1ea8SHidehiro Kawai 41137ffe1ea8SHidehiro Kawai out: 4114dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4115ac27a0ecSDave Kleikamp } 4116ac27a0ecSDave Kleikamp 4117ac27a0ecSDave Kleikamp /* 4118ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4119ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4120ac27a0ecSDave Kleikamp * main filesystem now. 4121ac27a0ecSDave Kleikamp */ 4122617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4123617ba13bSMingming Cao struct ext4_super_block *es) 4124ac27a0ecSDave Kleikamp { 4125ac27a0ecSDave Kleikamp journal_t *journal; 4126ac27a0ecSDave Kleikamp int j_errno; 4127ac27a0ecSDave Kleikamp const char *errstr; 4128ac27a0ecSDave Kleikamp 41290390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 41300390131bSFrank Mayhar 4131617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4132ac27a0ecSDave Kleikamp 4133ac27a0ecSDave Kleikamp /* 4134ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4135617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4136ac27a0ecSDave Kleikamp */ 4137ac27a0ecSDave Kleikamp 4138dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4139ac27a0ecSDave Kleikamp if (j_errno) { 4140ac27a0ecSDave Kleikamp char nbuf[16]; 4141ac27a0ecSDave Kleikamp 4142617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 414312062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4144ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 414512062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4146ac27a0ecSDave Kleikamp 4147617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4148617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4149e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4150ac27a0ecSDave Kleikamp 4151dab291afSMingming Cao jbd2_journal_clear_err(journal); 4152ac27a0ecSDave Kleikamp } 4153ac27a0ecSDave Kleikamp } 4154ac27a0ecSDave Kleikamp 4155ac27a0ecSDave Kleikamp /* 4156ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4157ac27a0ecSDave Kleikamp * and wait on the commit. 4158ac27a0ecSDave Kleikamp */ 4159617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4160ac27a0ecSDave Kleikamp { 4161ac27a0ecSDave Kleikamp journal_t *journal; 41620390131bSFrank Mayhar int ret = 0; 4163ac27a0ecSDave Kleikamp 4164ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4165ac27a0ecSDave Kleikamp return 0; 4166ac27a0ecSDave Kleikamp 4167617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 41686b0310fbSEric Sandeen if (journal) { 4169437f88ccSEric Sandeen vfs_check_frozen(sb, SB_FREEZE_TRANS); 4170617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 41716b0310fbSEric Sandeen } 41720390131bSFrank Mayhar 4173ac27a0ecSDave Kleikamp return ret; 4174ac27a0ecSDave Kleikamp } 4175ac27a0ecSDave Kleikamp 4176617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 4177ac27a0ecSDave Kleikamp { 4178ebc1ac16SChristoph Hellwig lock_super(sb); 4179e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4180ebc1ac16SChristoph Hellwig unlock_super(sb); 41810390131bSFrank Mayhar } 4182ac27a0ecSDave Kleikamp 4183617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4184ac27a0ecSDave Kleikamp { 418514ce0cb4STheodore Ts'o int ret = 0; 41869eddacf9SJan Kara tid_t target; 41878d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4188ac27a0ecSDave Kleikamp 41899bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 41908d5d02e6SMingming Cao flush_workqueue(sbi->dio_unwritten_wq); 41918d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4192ac27a0ecSDave Kleikamp if (wait) 41938d5d02e6SMingming Cao jbd2_log_wait_commit(sbi->s_journal, target); 41940390131bSFrank Mayhar } 419514ce0cb4STheodore Ts'o return ret; 4196ac27a0ecSDave Kleikamp } 4197ac27a0ecSDave Kleikamp 4198ac27a0ecSDave Kleikamp /* 4199ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4200ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4201be4f27d3SYongqiang Yang * 4202be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 4203be4f27d3SYongqiang Yang * state independently, because ext4 prevents a new handle from being started 4204be4f27d3SYongqiang Yang * by @sb->s_frozen, which stays in an upper layer. It thus needs help from 4205be4f27d3SYongqiang Yang * the upper layer. 4206ac27a0ecSDave Kleikamp */ 4207c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4208ac27a0ecSDave Kleikamp { 4209c4be0c1dSTakashi Sato int error = 0; 4210c4be0c1dSTakashi Sato journal_t *journal; 4211ac27a0ecSDave Kleikamp 42129ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 42139ca92389STheodore Ts'o return 0; 42149ca92389STheodore Ts'o 4215c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4216ac27a0ecSDave Kleikamp 4217ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4218dab291afSMingming Cao jbd2_journal_lock_updates(journal); 42197ffe1ea8SHidehiro Kawai 42207ffe1ea8SHidehiro Kawai /* 42219ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 42229ca92389STheodore Ts'o * the journal. 42237ffe1ea8SHidehiro Kawai */ 4224c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 42256b0310fbSEric Sandeen if (error < 0) 42266b0310fbSEric Sandeen goto out; 4227ac27a0ecSDave Kleikamp 4228ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4229617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4230e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 42316b0310fbSEric Sandeen out: 42326b0310fbSEric Sandeen /* we rely on s_frozen to stop further updates */ 42336b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 42346b0310fbSEric Sandeen return error; 4235ac27a0ecSDave Kleikamp } 4236ac27a0ecSDave Kleikamp 4237ac27a0ecSDave Kleikamp /* 4238ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4239ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4240ac27a0ecSDave Kleikamp */ 4241c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4242ac27a0ecSDave Kleikamp { 42439ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 42449ca92389STheodore Ts'o return 0; 42459ca92389STheodore Ts'o 4246ac27a0ecSDave Kleikamp lock_super(sb); 42479ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4248617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4249e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4250ac27a0ecSDave Kleikamp unlock_super(sb); 4251c4be0c1dSTakashi Sato return 0; 4252ac27a0ecSDave Kleikamp } 4253ac27a0ecSDave Kleikamp 4254673c6100STheodore Ts'o /* 4255673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4256673c6100STheodore Ts'o */ 4257673c6100STheodore Ts'o struct ext4_mount_options { 4258673c6100STheodore Ts'o unsigned long s_mount_opt; 4259a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 4260673c6100STheodore Ts'o uid_t s_resuid; 4261673c6100STheodore Ts'o gid_t s_resgid; 4262673c6100STheodore Ts'o unsigned long s_commit_interval; 4263673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4264673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4265673c6100STheodore Ts'o int s_jquota_fmt; 4266673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4267673c6100STheodore Ts'o #endif 4268673c6100STheodore Ts'o }; 4269673c6100STheodore Ts'o 4270617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4271ac27a0ecSDave Kleikamp { 4272617ba13bSMingming Cao struct ext4_super_block *es; 4273617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4274617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 4275ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4276617ba13bSMingming Cao struct ext4_mount_options old_opts; 4277c79d967dSChristoph Hellwig int enable_quota = 0; 42788a266467STheodore Ts'o ext4_group_t g; 4279b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4280*c5e06d10SJohann Lombardi int err = 0; 4281ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4282ac27a0ecSDave Kleikamp int i; 4283ac27a0ecSDave Kleikamp #endif 4284d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4285ac27a0ecSDave Kleikamp 4286ac27a0ecSDave Kleikamp /* Store the original options */ 4287bbd6851aSAl Viro lock_super(sb); 4288ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4289ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4290a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4291ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4292ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4293ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 429430773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 429530773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4296ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4297ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4298ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4299ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 4300ac27a0ecSDave Kleikamp #endif 4301b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4302b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4303ac27a0ecSDave Kleikamp 4304ac27a0ecSDave Kleikamp /* 4305ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4306ac27a0ecSDave Kleikamp */ 4307b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 4308b3881f74STheodore Ts'o &n_blocks_count, 1)) { 4309ac27a0ecSDave Kleikamp err = -EINVAL; 4310ac27a0ecSDave Kleikamp goto restore_opts; 4311ac27a0ecSDave Kleikamp } 4312ac27a0ecSDave Kleikamp 43134ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4314c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4315ac27a0ecSDave Kleikamp 4316ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4317482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4318ac27a0ecSDave Kleikamp 4319ac27a0ecSDave Kleikamp es = sbi->s_es; 4320ac27a0ecSDave Kleikamp 4321b3881f74STheodore Ts'o if (sbi->s_journal) { 4322617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4323b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4324b3881f74STheodore Ts'o } 4325ac27a0ecSDave Kleikamp 4326ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 4327bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 43284ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4329ac27a0ecSDave Kleikamp err = -EROFS; 4330ac27a0ecSDave Kleikamp goto restore_opts; 4331ac27a0ecSDave Kleikamp } 4332ac27a0ecSDave Kleikamp 4333ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 43340f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 43350f0dd62fSChristoph Hellwig if (err < 0) 4336c79d967dSChristoph Hellwig goto restore_opts; 4337c79d967dSChristoph Hellwig 4338ac27a0ecSDave Kleikamp /* 4339ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4340ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4341ac27a0ecSDave Kleikamp */ 4342ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4343ac27a0ecSDave Kleikamp 4344ac27a0ecSDave Kleikamp /* 4345ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4346ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4347ac27a0ecSDave Kleikamp * mark the partition as valid again. 4348ac27a0ecSDave Kleikamp */ 4349617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4350617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4351ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4352ac27a0ecSDave Kleikamp 4353a63c9eb2STheodore Ts'o if (sbi->s_journal) 4354617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4355ac27a0ecSDave Kleikamp } else { 4356a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4357a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4358ac27a0ecSDave Kleikamp err = -EROFS; 4359ac27a0ecSDave Kleikamp goto restore_opts; 4360ac27a0ecSDave Kleikamp } 4361ead6596bSEric Sandeen /* 43628a266467STheodore Ts'o * Make sure the group descriptor checksums 43630b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 43648a266467STheodore Ts'o */ 43658a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 43668a266467STheodore Ts'o struct ext4_group_desc *gdp = 43678a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 43688a266467STheodore Ts'o 43698a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 4370b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4371b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 43728a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 43738a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 43748a266467STheodore Ts'o err = -EINVAL; 43758a266467STheodore Ts'o goto restore_opts; 43768a266467STheodore Ts'o } 43778a266467STheodore Ts'o } 43788a266467STheodore Ts'o 43798a266467STheodore Ts'o /* 4380ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4381ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4382ead6596bSEric Sandeen * require a full umount/remount for now. 4383ead6596bSEric Sandeen */ 4384ead6596bSEric Sandeen if (es->s_last_orphan) { 4385b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4386ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4387ead6596bSEric Sandeen "orphan inode list. Please " 4388b31e1552SEric Sandeen "umount/remount instead"); 4389ead6596bSEric Sandeen err = -EINVAL; 4390ead6596bSEric Sandeen goto restore_opts; 4391ead6596bSEric Sandeen } 4392ead6596bSEric Sandeen 4393ac27a0ecSDave Kleikamp /* 4394ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4395ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4396ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4397ac27a0ecSDave Kleikamp * the partition.) 4398ac27a0ecSDave Kleikamp */ 43990390131bSFrank Mayhar if (sbi->s_journal) 4400617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4401ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4402617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 4403ac27a0ecSDave Kleikamp goto restore_opts; 4404617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4405ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4406*c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4407*c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4408*c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4409*c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4410*c5e06d10SJohann Lombardi err = -EROFS; 4411*c5e06d10SJohann Lombardi goto restore_opts; 4412*c5e06d10SJohann Lombardi } 4413c79d967dSChristoph Hellwig enable_quota = 1; 4414ac27a0ecSDave Kleikamp } 4415ac27a0ecSDave Kleikamp } 4416bfff6873SLukas Czerner 4417bfff6873SLukas Czerner /* 4418bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4419bfff6873SLukas Czerner * current settings 4420bfff6873SLukas Czerner */ 4421bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4422bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4423bfff6873SLukas Czerner else { 4424bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4425bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4426bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4427bfff6873SLukas Czerner } 4428bfff6873SLukas Czerner 44296fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 44300390131bSFrank Mayhar if (sbi->s_journal == NULL) 4431e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 44320390131bSFrank Mayhar 4433ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4434ac27a0ecSDave Kleikamp /* Release old quota file names */ 4435ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4436ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 4437ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4438ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 4439ac27a0ecSDave Kleikamp #endif 4440bbd6851aSAl Viro unlock_super(sb); 4441c79d967dSChristoph Hellwig if (enable_quota) 44420f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 4443d4c402d9SCurt Wohlgemuth 4444d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4445d4c402d9SCurt Wohlgemuth kfree(orig_data); 4446ac27a0ecSDave Kleikamp return 0; 44470b8e58a1SAndreas Dilger 4448ac27a0ecSDave Kleikamp restore_opts: 4449ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4450ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4451a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4452ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4453ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4454ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 445530773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 445630773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4457ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4458ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4459ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4460ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 4461ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 4462ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4463ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4464ac27a0ecSDave Kleikamp } 4465ac27a0ecSDave Kleikamp #endif 4466bbd6851aSAl Viro unlock_super(sb); 4467d4c402d9SCurt Wohlgemuth kfree(orig_data); 4468ac27a0ecSDave Kleikamp return err; 4469ac27a0ecSDave Kleikamp } 4470ac27a0ecSDave Kleikamp 4471617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4472ac27a0ecSDave Kleikamp { 4473ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4474617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4475617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 4476960cc398SPekka Enberg u64 fsid; 4477d02a9391SKazuya Mio s64 bfree; 4478ac27a0ecSDave Kleikamp 44795e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 44805e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 44816bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 44828df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 44835e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 4484ac27a0ecSDave Kleikamp 4485ac27a0ecSDave Kleikamp /* 44865e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 44875e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 44885e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 4489ac27a0ecSDave Kleikamp */ 4490ac27a0ecSDave Kleikamp 4491ac27a0ecSDave Kleikamp /* 4492ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 4493ac27a0ecSDave Kleikamp * overhead 4494ac27a0ecSDave Kleikamp */ 4495ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 4496ac27a0ecSDave Kleikamp 4497ac27a0ecSDave Kleikamp /* 4498ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 4499ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 4500ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 4501ac27a0ecSDave Kleikamp */ 4502ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 4503617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 4504617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 4505ac27a0ecSDave Kleikamp cond_resched(); 4506ac27a0ecSDave Kleikamp } 4507ac27a0ecSDave Kleikamp 4508ac27a0ecSDave Kleikamp /* 4509ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 4510ac27a0ecSDave Kleikamp * bitmap, and an inode table. 4511ac27a0ecSDave Kleikamp */ 45125e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 45135e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 45145e70030dSBadari Pulavarty smp_wmb(); 45156bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 4516ac27a0ecSDave Kleikamp } 4517ac27a0ecSDave Kleikamp 4518617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4519ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 45205e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 4521d02a9391SKazuya Mio bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 45226bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 4523d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 4524d02a9391SKazuya Mio buf->f_bfree = max_t(s64, bfree, 0); 4525bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 4526bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 4527ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4528ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 452952d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4530617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4531960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4532960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4533960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4534960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 45350b8e58a1SAndreas Dilger 4536ac27a0ecSDave Kleikamp return 0; 4537ac27a0ecSDave Kleikamp } 4538ac27a0ecSDave Kleikamp 45390b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 45400b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 4541ac27a0ecSDave Kleikamp * Process 1 Process 2 4542617ba13bSMingming Cao * ext4_create() quota_sync() 4543dab291afSMingming Cao * jbd2_journal_start() write_dquot() 4544871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 4545dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 4546ac27a0ecSDave Kleikamp * 4547ac27a0ecSDave Kleikamp */ 4548ac27a0ecSDave Kleikamp 4549ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4550ac27a0ecSDave Kleikamp 4551ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 4552ac27a0ecSDave Kleikamp { 4553ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 4554ac27a0ecSDave Kleikamp } 4555ac27a0ecSDave Kleikamp 4556617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 4557ac27a0ecSDave Kleikamp { 4558ac27a0ecSDave Kleikamp int ret, err; 4559ac27a0ecSDave Kleikamp handle_t *handle; 4560ac27a0ecSDave Kleikamp struct inode *inode; 4561ac27a0ecSDave Kleikamp 4562ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 4563617ba13bSMingming Cao handle = ext4_journal_start(inode, 4564617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 4565ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4566ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4567ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 4568617ba13bSMingming Cao err = ext4_journal_stop(handle); 4569ac27a0ecSDave Kleikamp if (!ret) 4570ac27a0ecSDave Kleikamp ret = err; 4571ac27a0ecSDave Kleikamp return ret; 4572ac27a0ecSDave Kleikamp } 4573ac27a0ecSDave Kleikamp 4574617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 4575ac27a0ecSDave Kleikamp { 4576ac27a0ecSDave Kleikamp int ret, err; 4577ac27a0ecSDave Kleikamp handle_t *handle; 4578ac27a0ecSDave Kleikamp 4579617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4580617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 4581ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4582ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4583ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 4584617ba13bSMingming Cao err = ext4_journal_stop(handle); 4585ac27a0ecSDave Kleikamp if (!ret) 4586ac27a0ecSDave Kleikamp ret = err; 4587ac27a0ecSDave Kleikamp return ret; 4588ac27a0ecSDave Kleikamp } 4589ac27a0ecSDave Kleikamp 4590617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 4591ac27a0ecSDave Kleikamp { 4592ac27a0ecSDave Kleikamp int ret, err; 4593ac27a0ecSDave Kleikamp handle_t *handle; 4594ac27a0ecSDave Kleikamp 4595617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 4596617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 45979c3013e9SJan Kara if (IS_ERR(handle)) { 45989c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 45999c3013e9SJan Kara dquot_release(dquot); 4600ac27a0ecSDave Kleikamp return PTR_ERR(handle); 46019c3013e9SJan Kara } 4602ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 4603617ba13bSMingming Cao err = ext4_journal_stop(handle); 4604ac27a0ecSDave Kleikamp if (!ret) 4605ac27a0ecSDave Kleikamp ret = err; 4606ac27a0ecSDave Kleikamp return ret; 4607ac27a0ecSDave Kleikamp } 4608ac27a0ecSDave Kleikamp 4609617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 4610ac27a0ecSDave Kleikamp { 46112c8be6b2SJan Kara /* Are we journaling quotas? */ 4612617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 4613617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 4614ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 4615617ba13bSMingming Cao return ext4_write_dquot(dquot); 4616ac27a0ecSDave Kleikamp } else { 4617ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 4618ac27a0ecSDave Kleikamp } 4619ac27a0ecSDave Kleikamp } 4620ac27a0ecSDave Kleikamp 4621617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 4622ac27a0ecSDave Kleikamp { 4623ac27a0ecSDave Kleikamp int ret, err; 4624ac27a0ecSDave Kleikamp handle_t *handle; 4625ac27a0ecSDave Kleikamp 4626ac27a0ecSDave Kleikamp /* Data block + inode block */ 4627617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 4628ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 4629ac27a0ecSDave Kleikamp return PTR_ERR(handle); 4630ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 4631617ba13bSMingming Cao err = ext4_journal_stop(handle); 4632ac27a0ecSDave Kleikamp if (!ret) 4633ac27a0ecSDave Kleikamp ret = err; 4634ac27a0ecSDave Kleikamp return ret; 4635ac27a0ecSDave Kleikamp } 4636ac27a0ecSDave Kleikamp 4637ac27a0ecSDave Kleikamp /* 4638ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 4639ac27a0ecSDave Kleikamp * the quota file and such... 4640ac27a0ecSDave Kleikamp */ 4641617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 4642ac27a0ecSDave Kleikamp { 4643287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 4644617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 4645ac27a0ecSDave Kleikamp } 4646ac27a0ecSDave Kleikamp 4647ac27a0ecSDave Kleikamp /* 4648ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 4649ac27a0ecSDave Kleikamp */ 4650617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 4651f00c9e44SJan Kara struct path *path) 4652ac27a0ecSDave Kleikamp { 4653ac27a0ecSDave Kleikamp int err; 4654ac27a0ecSDave Kleikamp 4655ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 4656ac27a0ecSDave Kleikamp return -EINVAL; 46570623543bSJan Kara 4658ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 4659f00c9e44SJan Kara if (path->mnt->mnt_sb != sb) 4660ac27a0ecSDave Kleikamp return -EXDEV; 46610623543bSJan Kara /* Journaling quota? */ 46620623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 46632b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 4664f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 4665b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 4666b31e1552SEric Sandeen "Quota file not on filesystem root. " 4667b31e1552SEric Sandeen "Journaled quota will not work"); 46680623543bSJan Kara } 46690623543bSJan Kara 46700623543bSJan Kara /* 46710623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 46720623543bSJan Kara * all updates to the file when we bypass pagecache... 46730623543bSJan Kara */ 46740390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 4675f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 46760623543bSJan Kara /* 46770623543bSJan Kara * We don't need to lock updates but journal_flush() could 46780623543bSJan Kara * otherwise be livelocked... 46790623543bSJan Kara */ 46800623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 46817ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 46820623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 4683f00c9e44SJan Kara if (err) 46847ffe1ea8SHidehiro Kawai return err; 46857ffe1ea8SHidehiro Kawai } 46860623543bSJan Kara 4687f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 4688ac27a0ecSDave Kleikamp } 4689ac27a0ecSDave Kleikamp 4690ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 4691ca0e05e4SDmitry Monakhov { 469221f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 469321f97697SJan Kara handle_t *handle; 469421f97697SJan Kara 469587009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 469687009d86SDmitry Monakhov * Caller already holds s_umount sem */ 469787009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 4698ca0e05e4SDmitry Monakhov sync_filesystem(sb); 4699ca0e05e4SDmitry Monakhov 47000b268590SAmir Goldstein if (!inode) 47010b268590SAmir Goldstein goto out; 47020b268590SAmir Goldstein 470321f97697SJan Kara /* Update modification times of quota files when userspace can 470421f97697SJan Kara * start looking at them */ 470521f97697SJan Kara handle = ext4_journal_start(inode, 1); 470621f97697SJan Kara if (IS_ERR(handle)) 470721f97697SJan Kara goto out; 470821f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 470921f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 471021f97697SJan Kara ext4_journal_stop(handle); 471121f97697SJan Kara 471221f97697SJan Kara out: 4713ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 4714ca0e05e4SDmitry Monakhov } 4715ca0e05e4SDmitry Monakhov 4716ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 4717ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 4718ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 4719ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 4720617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 4721ac27a0ecSDave Kleikamp size_t len, loff_t off) 4722ac27a0ecSDave Kleikamp { 4723ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4724725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4725ac27a0ecSDave Kleikamp int err = 0; 4726ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4727ac27a0ecSDave Kleikamp int tocopy; 4728ac27a0ecSDave Kleikamp size_t toread; 4729ac27a0ecSDave Kleikamp struct buffer_head *bh; 4730ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 4731ac27a0ecSDave Kleikamp 4732ac27a0ecSDave Kleikamp if (off > i_size) 4733ac27a0ecSDave Kleikamp return 0; 4734ac27a0ecSDave Kleikamp if (off+len > i_size) 4735ac27a0ecSDave Kleikamp len = i_size-off; 4736ac27a0ecSDave Kleikamp toread = len; 4737ac27a0ecSDave Kleikamp while (toread > 0) { 4738ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 4739ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 4740617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 4741ac27a0ecSDave Kleikamp if (err) 4742ac27a0ecSDave Kleikamp return err; 4743ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 4744ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 4745ac27a0ecSDave Kleikamp else 4746ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 4747ac27a0ecSDave Kleikamp brelse(bh); 4748ac27a0ecSDave Kleikamp offset = 0; 4749ac27a0ecSDave Kleikamp toread -= tocopy; 4750ac27a0ecSDave Kleikamp data += tocopy; 4751ac27a0ecSDave Kleikamp blk++; 4752ac27a0ecSDave Kleikamp } 4753ac27a0ecSDave Kleikamp return len; 4754ac27a0ecSDave Kleikamp } 4755ac27a0ecSDave Kleikamp 4756ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 4757ac27a0ecSDave Kleikamp * enough credits) */ 4758617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 4759ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 4760ac27a0ecSDave Kleikamp { 4761ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 4762725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 4763ac27a0ecSDave Kleikamp int err = 0; 4764ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 4765ac27a0ecSDave Kleikamp struct buffer_head *bh; 4766ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 4767ac27a0ecSDave Kleikamp 47680390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 4769b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 4770b31e1552SEric Sandeen " cancelled because transaction is not started", 47719c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 47729c3013e9SJan Kara return -EIO; 47739c3013e9SJan Kara } 477467eeb568SDmitry Monakhov /* 477567eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 477667eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 477767eeb568SDmitry Monakhov */ 477867eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 477967eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 478067eeb568SDmitry Monakhov " cancelled because not block aligned", 478167eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 478267eeb568SDmitry Monakhov return -EIO; 478367eeb568SDmitry Monakhov } 478467eeb568SDmitry Monakhov 4785ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 4786617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 4787ac27a0ecSDave Kleikamp if (!bh) 4788ac27a0ecSDave Kleikamp goto out; 4789617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 4790ac27a0ecSDave Kleikamp if (err) { 4791ac27a0ecSDave Kleikamp brelse(bh); 4792ac27a0ecSDave Kleikamp goto out; 4793ac27a0ecSDave Kleikamp } 4794ac27a0ecSDave Kleikamp lock_buffer(bh); 479567eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 4796ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 4797ac27a0ecSDave Kleikamp unlock_buffer(bh); 47980390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 4799ac27a0ecSDave Kleikamp brelse(bh); 4800ac27a0ecSDave Kleikamp out: 480167eeb568SDmitry Monakhov if (err) { 48024d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 4803ac27a0ecSDave Kleikamp return err; 48044d04e4fbSJan Kara } 480567eeb568SDmitry Monakhov if (inode->i_size < off + len) { 480667eeb568SDmitry Monakhov i_size_write(inode, off + len); 4807617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 4808617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 480921f97697SJan Kara } 4810ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 481167eeb568SDmitry Monakhov return len; 4812ac27a0ecSDave Kleikamp } 4813ac27a0ecSDave Kleikamp 4814ac27a0ecSDave Kleikamp #endif 4815ac27a0ecSDave Kleikamp 4816152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 4817152a0836SAl Viro const char *dev_name, void *data) 4818ac27a0ecSDave Kleikamp { 4819152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 4820ac27a0ecSDave Kleikamp } 4821ac27a0ecSDave Kleikamp 482237f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 482324b58424STheodore Ts'o static inline void register_as_ext2(void) 482424b58424STheodore Ts'o { 482524b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 482624b58424STheodore Ts'o if (err) 482724b58424STheodore Ts'o printk(KERN_WARNING 482824b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 482924b58424STheodore Ts'o } 483024b58424STheodore Ts'o 483124b58424STheodore Ts'o static inline void unregister_as_ext2(void) 483224b58424STheodore Ts'o { 483324b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 483424b58424STheodore Ts'o } 48352035e776STheodore Ts'o 48362035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 48372035e776STheodore Ts'o { 48382035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 48392035e776STheodore Ts'o return 0; 48402035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48412035e776STheodore Ts'o return 1; 48422035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 48432035e776STheodore Ts'o return 0; 48442035e776STheodore Ts'o return 1; 48452035e776STheodore Ts'o } 484651b7e3c9STheodore Ts'o MODULE_ALIAS("ext2"); 484724b58424STheodore Ts'o #else 484824b58424STheodore Ts'o static inline void register_as_ext2(void) { } 484924b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 48502035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 485124b58424STheodore Ts'o #endif 485224b58424STheodore Ts'o 485337f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 485424b58424STheodore Ts'o static inline void register_as_ext3(void) 485524b58424STheodore Ts'o { 485624b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 485724b58424STheodore Ts'o if (err) 485824b58424STheodore Ts'o printk(KERN_WARNING 485924b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 486024b58424STheodore Ts'o } 486124b58424STheodore Ts'o 486224b58424STheodore Ts'o static inline void unregister_as_ext3(void) 486324b58424STheodore Ts'o { 486424b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 486524b58424STheodore Ts'o } 48662035e776STheodore Ts'o 48672035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 48682035e776STheodore Ts'o { 48692035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 48702035e776STheodore Ts'o return 0; 48712035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 48722035e776STheodore Ts'o return 0; 48732035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 48742035e776STheodore Ts'o return 1; 48752035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 48762035e776STheodore Ts'o return 0; 48772035e776STheodore Ts'o return 1; 48782035e776STheodore Ts'o } 487951b7e3c9STheodore Ts'o MODULE_ALIAS("ext3"); 488024b58424STheodore Ts'o #else 488124b58424STheodore Ts'o static inline void register_as_ext3(void) { } 488224b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 48832035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 488424b58424STheodore Ts'o #endif 488524b58424STheodore Ts'o 488603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 4887ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 488803010a33STheodore Ts'o .name = "ext4", 4889152a0836SAl Viro .mount = ext4_mount, 4890ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 4891ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 4892ac27a0ecSDave Kleikamp }; 4893ac27a0ecSDave Kleikamp 48948f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 4895857ac889SLukas Czerner { 4896857ac889SLukas Czerner struct ext4_features *ef; 4897857ac889SLukas Czerner int ret = -ENOMEM; 4898857ac889SLukas Czerner 4899857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 4900857ac889SLukas Czerner if (!ef) 4901857ac889SLukas Czerner goto out; 4902857ac889SLukas Czerner 4903857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 4904857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 4905857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 4906857ac889SLukas Czerner "features"); 4907857ac889SLukas Czerner if (ret) { 4908857ac889SLukas Czerner kfree(ef); 4909857ac889SLukas Czerner goto out; 4910857ac889SLukas Czerner } 4911857ac889SLukas Czerner 4912857ac889SLukas Czerner ext4_feat = ef; 4913857ac889SLukas Czerner ret = 0; 4914857ac889SLukas Czerner out: 4915857ac889SLukas Czerner return ret; 4916857ac889SLukas Czerner } 4917857ac889SLukas Czerner 49188f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 49198f021222SLukas Czerner { 49208f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 49218f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 49228f021222SLukas Czerner kfree(ext4_feat); 49238f021222SLukas Czerner } 49248f021222SLukas Czerner 4925e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 4926e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 4927e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 4928e9e3bcecSEric Sandeen 49295dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 4930ac27a0ecSDave Kleikamp { 4931e9e3bcecSEric Sandeen int i, err; 4932c9de560dSAlex Tomas 493312e9b892SDmitry Monakhov ext4_check_flag_values(); 4934e9e3bcecSEric Sandeen 4935e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 4936e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 4937e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 4938e9e3bcecSEric Sandeen } 4939e9e3bcecSEric Sandeen 49405dabfc78STheodore Ts'o err = ext4_init_pageio(); 49416fd058f7STheodore Ts'o if (err) 49426fd058f7STheodore Ts'o return err; 49435dabfc78STheodore Ts'o err = ext4_init_system_zone(); 4944bd2d0210STheodore Ts'o if (err) 4945dd68314cSTheodore Ts'o goto out7; 49463197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 49473197ebdbSTheodore Ts'o if (!ext4_kset) 4948dd68314cSTheodore Ts'o goto out6; 49499f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 4950dd68314cSTheodore Ts'o if (!ext4_proc_root) 4951dd68314cSTheodore Ts'o goto out5; 4952857ac889SLukas Czerner 4953857ac889SLukas Czerner err = ext4_init_feat_adverts(); 4954dd68314cSTheodore Ts'o if (err) 4955dd68314cSTheodore Ts'o goto out4; 4956857ac889SLukas Czerner 49575dabfc78STheodore Ts'o err = ext4_init_mballoc(); 4958ac27a0ecSDave Kleikamp if (err) 49596fd058f7STheodore Ts'o goto out3; 4960c9de560dSAlex Tomas 49615dabfc78STheodore Ts'o err = ext4_init_xattr(); 4962c9de560dSAlex Tomas if (err) 4963c9de560dSAlex Tomas goto out2; 4964ac27a0ecSDave Kleikamp err = init_inodecache(); 4965ac27a0ecSDave Kleikamp if (err) 4966ac27a0ecSDave Kleikamp goto out1; 496724b58424STheodore Ts'o register_as_ext3(); 49682035e776STheodore Ts'o register_as_ext2(); 496903010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 4970ac27a0ecSDave Kleikamp if (err) 4971ac27a0ecSDave Kleikamp goto out; 4972bfff6873SLukas Czerner 4973bfff6873SLukas Czerner ext4_li_info = NULL; 4974bfff6873SLukas Czerner mutex_init(&ext4_li_mtx); 4975ac27a0ecSDave Kleikamp return 0; 4976ac27a0ecSDave Kleikamp out: 497724b58424STheodore Ts'o unregister_as_ext2(); 497824b58424STheodore Ts'o unregister_as_ext3(); 4979ac27a0ecSDave Kleikamp destroy_inodecache(); 4980ac27a0ecSDave Kleikamp out1: 49815dabfc78STheodore Ts'o ext4_exit_xattr(); 4982c9de560dSAlex Tomas out2: 49835dabfc78STheodore Ts'o ext4_exit_mballoc(); 49846fd058f7STheodore Ts'o out3: 49858f021222SLukas Czerner ext4_exit_feat_adverts(); 49866fd058f7STheodore Ts'o out4: 4987dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 4988bd2d0210STheodore Ts'o out5: 4989dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 4990dd68314cSTheodore Ts'o out6: 4991dd68314cSTheodore Ts'o ext4_exit_system_zone(); 4992dd68314cSTheodore Ts'o out7: 49935dabfc78STheodore Ts'o ext4_exit_pageio(); 4994ac27a0ecSDave Kleikamp return err; 4995ac27a0ecSDave Kleikamp } 4996ac27a0ecSDave Kleikamp 49975dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 4998ac27a0ecSDave Kleikamp { 4999bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 500024b58424STheodore Ts'o unregister_as_ext2(); 500124b58424STheodore Ts'o unregister_as_ext3(); 500203010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5003ac27a0ecSDave Kleikamp destroy_inodecache(); 50045dabfc78STheodore Ts'o ext4_exit_xattr(); 50055dabfc78STheodore Ts'o ext4_exit_mballoc(); 50068f021222SLukas Czerner ext4_exit_feat_adverts(); 50079f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 50083197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 50095dabfc78STheodore Ts'o ext4_exit_system_zone(); 50105dabfc78STheodore Ts'o ext4_exit_pageio(); 5011ac27a0ecSDave Kleikamp } 5012ac27a0ecSDave Kleikamp 5013ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 501483982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5015ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 50165dabfc78STheodore Ts'o module_init(ext4_init_fs) 50175dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5018