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/smp_lock.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 389f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 393197ebdbSTheodore Ts'o #include <linux/ctype.h> 401330593eSVignesh Babu #include <linux/log2.h> 41717d50e4SAndreas Dilger #include <linux/crc16.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 443dcf5451SChristoph Hellwig #include "ext4.h" 453dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 46ac27a0ecSDave Kleikamp #include "xattr.h" 47ac27a0ecSDave Kleikamp #include "acl.h" 48ac27a0ecSDave Kleikamp 499bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 509bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 519bffad1eSTheodore Ts'o 52f4033903SCurt Wohlgemuth static int default_mb_history_length = 1000; 53f4033903SCurt Wohlgemuth 54f4033903SCurt Wohlgemuth module_param_named(default_mb_history_length, default_mb_history_length, 55f4033903SCurt Wohlgemuth int, 0644); 56f4033903SCurt Wohlgemuth MODULE_PARM_DESC(default_mb_history_length, 57f4033903SCurt Wohlgemuth "Default number of entries saved for mb_history"); 58f4033903SCurt Wohlgemuth 599f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 603197ebdbSTheodore Ts'o static struct kset *ext4_kset; 619f6200bbSTheodore Ts'o 62617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 63ac27a0ecSDave Kleikamp unsigned long journal_devnum); 64e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 65617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 66617ba13bSMingming Cao struct ext4_super_block *es); 67617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 68617ba13bSMingming Cao struct ext4_super_block *es); 69617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 70617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 71ac27a0ecSDave Kleikamp char nbuf[16]); 72617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 73617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 74c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 75617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 76c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 77ac27a0ecSDave Kleikamp 78bd81d8eeSLaurent Vivier 798fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 808fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 81bd81d8eeSLaurent Vivier { 823a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 838fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 848fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 85bd81d8eeSLaurent Vivier } 86bd81d8eeSLaurent Vivier 878fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 888fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 89bd81d8eeSLaurent Vivier { 905272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 918fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 928fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 93bd81d8eeSLaurent Vivier } 94bd81d8eeSLaurent Vivier 958fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 968fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 97bd81d8eeSLaurent Vivier { 985272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 998fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1008fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 101bd81d8eeSLaurent Vivier } 102bd81d8eeSLaurent Vivier 103560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 104560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 105560671a0SAneesh Kumar K.V { 106560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 107560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 108560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 109560671a0SAneesh Kumar K.V } 110560671a0SAneesh Kumar K.V 111560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 112560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 113560671a0SAneesh Kumar K.V { 114560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 115560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 116560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 117560671a0SAneesh Kumar K.V } 118560671a0SAneesh Kumar K.V 119560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 120560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 121560671a0SAneesh Kumar K.V { 122560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 123560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 124560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 125560671a0SAneesh Kumar K.V } 126560671a0SAneesh Kumar K.V 127560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 128560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 129560671a0SAneesh Kumar K.V { 130560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 131560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 132560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 133560671a0SAneesh Kumar K.V } 134560671a0SAneesh Kumar K.V 1358fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1368fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 137bd81d8eeSLaurent Vivier { 1383a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1398fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1408fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 141bd81d8eeSLaurent Vivier } 142bd81d8eeSLaurent Vivier 1438fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1448fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 145bd81d8eeSLaurent Vivier { 1465272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1478fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1488fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 149bd81d8eeSLaurent Vivier } 150bd81d8eeSLaurent Vivier 1518fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1528fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 153bd81d8eeSLaurent Vivier { 1545272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1558fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1568fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 157bd81d8eeSLaurent Vivier } 158bd81d8eeSLaurent Vivier 159560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 160560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 161560671a0SAneesh Kumar K.V { 162560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 163560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 164560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 165560671a0SAneesh Kumar K.V } 166560671a0SAneesh Kumar K.V 167560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 168560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 169560671a0SAneesh Kumar K.V { 170560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 171560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 172560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 173560671a0SAneesh Kumar K.V } 174560671a0SAneesh Kumar K.V 175560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 176560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 177560671a0SAneesh Kumar K.V { 178560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 179560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 180560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 181560671a0SAneesh Kumar K.V } 182560671a0SAneesh Kumar K.V 183560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 184560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 185560671a0SAneesh Kumar K.V { 186560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 187560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 188560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 189560671a0SAneesh Kumar K.V } 190560671a0SAneesh Kumar K.V 191ac27a0ecSDave Kleikamp /* 192dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 193ac27a0ecSDave Kleikamp * 194ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 195ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 196ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 197ac27a0ecSDave Kleikamp * appropriate. 198ac27a0ecSDave Kleikamp */ 199617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 200ac27a0ecSDave Kleikamp { 201ac27a0ecSDave Kleikamp journal_t *journal; 202ac27a0ecSDave Kleikamp 203ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 204ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 205ac27a0ecSDave Kleikamp 206ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 207ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 208ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 209617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2100390131bSFrank Mayhar if (journal) { 211ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 2120b8e58a1SAndreas Dilger ext4_abort(sb, __func__, "Detected aborted journal"); 213ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 214ac27a0ecSDave Kleikamp } 215dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 216ac27a0ecSDave Kleikamp } 2170390131bSFrank Mayhar /* 2180390131bSFrank Mayhar * We're not journaling, return the appropriate indication. 2190390131bSFrank Mayhar */ 2200390131bSFrank Mayhar current->journal_info = EXT4_NOJOURNAL_HANDLE; 2210390131bSFrank Mayhar return current->journal_info; 2220390131bSFrank Mayhar } 223ac27a0ecSDave Kleikamp 224ac27a0ecSDave Kleikamp /* 225ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 226dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 227ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 228ac27a0ecSDave Kleikamp * appropriate. 229ac27a0ecSDave Kleikamp */ 230617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 231ac27a0ecSDave Kleikamp { 232ac27a0ecSDave Kleikamp struct super_block *sb; 233ac27a0ecSDave Kleikamp int err; 234ac27a0ecSDave Kleikamp int rc; 235ac27a0ecSDave Kleikamp 2360390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 2370390131bSFrank Mayhar /* 2380390131bSFrank Mayhar * Do this here since we don't call jbd2_journal_stop() in 2390390131bSFrank Mayhar * no-journal mode. 2400390131bSFrank Mayhar */ 2410390131bSFrank Mayhar current->journal_info = NULL; 2420390131bSFrank Mayhar return 0; 2430390131bSFrank Mayhar } 244ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 245ac27a0ecSDave Kleikamp err = handle->h_err; 246dab291afSMingming Cao rc = jbd2_journal_stop(handle); 247ac27a0ecSDave Kleikamp 248ac27a0ecSDave Kleikamp if (!err) 249ac27a0ecSDave Kleikamp err = rc; 250ac27a0ecSDave Kleikamp if (err) 251617ba13bSMingming Cao __ext4_std_error(sb, where, err); 252ac27a0ecSDave Kleikamp return err; 253ac27a0ecSDave Kleikamp } 254ac27a0ecSDave Kleikamp 255617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 256ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 257ac27a0ecSDave Kleikamp { 258ac27a0ecSDave Kleikamp char nbuf[16]; 259617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 260ac27a0ecSDave Kleikamp 2610390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2620390131bSFrank Mayhar 263ac27a0ecSDave Kleikamp if (bh) 264ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 265ac27a0ecSDave Kleikamp 266ac27a0ecSDave Kleikamp if (!handle->h_err) 267ac27a0ecSDave Kleikamp handle->h_err = err; 268ac27a0ecSDave Kleikamp 269ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 270ac27a0ecSDave Kleikamp return; 271ac27a0ecSDave Kleikamp 272ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 273ac27a0ecSDave Kleikamp caller, errstr, err_fn); 274ac27a0ecSDave Kleikamp 275dab291afSMingming Cao jbd2_journal_abort_handle(handle); 276ac27a0ecSDave Kleikamp } 277ac27a0ecSDave Kleikamp 278ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 279ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 280ac27a0ecSDave Kleikamp * 281ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 282617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 283ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 284ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 285ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 286ac27a0ecSDave Kleikamp * write out the superblock safely. 287ac27a0ecSDave Kleikamp * 288dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 289ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 290ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 291ac27a0ecSDave Kleikamp */ 292ac27a0ecSDave Kleikamp 293617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 294ac27a0ecSDave Kleikamp { 295617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 296ac27a0ecSDave Kleikamp 297617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 298617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 299ac27a0ecSDave Kleikamp 300ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 301ac27a0ecSDave Kleikamp return; 302ac27a0ecSDave Kleikamp 303ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 304617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 305ac27a0ecSDave Kleikamp 3064ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 307ac27a0ecSDave Kleikamp if (journal) 308dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 309ac27a0ecSDave Kleikamp } 310ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 311b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 312ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 313ac27a0ecSDave Kleikamp } 314e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 315ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 316617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 317ac27a0ecSDave Kleikamp sb->s_id); 318ac27a0ecSDave Kleikamp } 319ac27a0ecSDave Kleikamp 320617ba13bSMingming Cao void ext4_error(struct super_block *sb, const char *function, 321ac27a0ecSDave Kleikamp const char *fmt, ...) 322ac27a0ecSDave Kleikamp { 323ac27a0ecSDave Kleikamp va_list args; 324ac27a0ecSDave Kleikamp 325ac27a0ecSDave Kleikamp va_start(args, fmt); 326617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 327ac27a0ecSDave Kleikamp vprintk(fmt, args); 328ac27a0ecSDave Kleikamp printk("\n"); 329ac27a0ecSDave Kleikamp va_end(args); 330ac27a0ecSDave Kleikamp 331617ba13bSMingming Cao ext4_handle_error(sb); 332ac27a0ecSDave Kleikamp } 333ac27a0ecSDave Kleikamp 334617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 335ac27a0ecSDave Kleikamp char nbuf[16]) 336ac27a0ecSDave Kleikamp { 337ac27a0ecSDave Kleikamp char *errstr = NULL; 338ac27a0ecSDave Kleikamp 339ac27a0ecSDave Kleikamp switch (errno) { 340ac27a0ecSDave Kleikamp case -EIO: 341ac27a0ecSDave Kleikamp errstr = "IO failure"; 342ac27a0ecSDave Kleikamp break; 343ac27a0ecSDave Kleikamp case -ENOMEM: 344ac27a0ecSDave Kleikamp errstr = "Out of memory"; 345ac27a0ecSDave Kleikamp break; 346ac27a0ecSDave Kleikamp case -EROFS: 347*78f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 348*78f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 349ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 350ac27a0ecSDave Kleikamp else 351ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 352ac27a0ecSDave Kleikamp break; 353ac27a0ecSDave Kleikamp default: 354ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 355ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 356ac27a0ecSDave Kleikamp * NULL. */ 357ac27a0ecSDave Kleikamp if (nbuf) { 358ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 359ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 360ac27a0ecSDave Kleikamp errstr = nbuf; 361ac27a0ecSDave Kleikamp } 362ac27a0ecSDave Kleikamp break; 363ac27a0ecSDave Kleikamp } 364ac27a0ecSDave Kleikamp 365ac27a0ecSDave Kleikamp return errstr; 366ac27a0ecSDave Kleikamp } 367ac27a0ecSDave Kleikamp 368617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 369ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 370ac27a0ecSDave Kleikamp 3712b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 372ac27a0ecSDave Kleikamp { 373ac27a0ecSDave Kleikamp char nbuf[16]; 374ac27a0ecSDave Kleikamp const char *errstr; 375ac27a0ecSDave Kleikamp 376ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 377ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 378ac27a0ecSDave Kleikamp * an error. */ 379ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 380ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 381ac27a0ecSDave Kleikamp return; 382ac27a0ecSDave Kleikamp 383617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 384617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 385ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 386ac27a0ecSDave Kleikamp 387617ba13bSMingming Cao ext4_handle_error(sb); 388ac27a0ecSDave Kleikamp } 389ac27a0ecSDave Kleikamp 390ac27a0ecSDave Kleikamp /* 391617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 392ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 393ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 394ac27a0ecSDave Kleikamp * 395ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 396ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 397ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 398ac27a0ecSDave Kleikamp */ 399ac27a0ecSDave Kleikamp 400617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 401ac27a0ecSDave Kleikamp const char *fmt, ...) 402ac27a0ecSDave Kleikamp { 403ac27a0ecSDave Kleikamp va_list args; 404ac27a0ecSDave Kleikamp 405ac27a0ecSDave Kleikamp va_start(args, fmt); 406617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 407ac27a0ecSDave Kleikamp vprintk(fmt, args); 408ac27a0ecSDave Kleikamp printk("\n"); 409ac27a0ecSDave Kleikamp va_end(args); 410ac27a0ecSDave Kleikamp 411ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 412617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 413ac27a0ecSDave Kleikamp 414ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 415ac27a0ecSDave Kleikamp return; 416ac27a0ecSDave Kleikamp 417b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 418617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 419ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4204ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 421ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 422dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 423ac27a0ecSDave Kleikamp } 424ac27a0ecSDave Kleikamp 425b31e1552SEric Sandeen void ext4_msg (struct super_block * sb, const char *prefix, 426b31e1552SEric Sandeen const char *fmt, ...) 427b31e1552SEric Sandeen { 428b31e1552SEric Sandeen va_list args; 429b31e1552SEric Sandeen 430b31e1552SEric Sandeen va_start(args, fmt); 431b31e1552SEric Sandeen printk("%sEXT4-fs (%s): ", prefix, sb->s_id); 432b31e1552SEric Sandeen vprintk(fmt, args); 433b31e1552SEric Sandeen printk("\n"); 434b31e1552SEric Sandeen va_end(args); 435b31e1552SEric Sandeen } 436b31e1552SEric Sandeen 437617ba13bSMingming Cao void ext4_warning(struct super_block *sb, const char *function, 438ac27a0ecSDave Kleikamp const char *fmt, ...) 439ac27a0ecSDave Kleikamp { 440ac27a0ecSDave Kleikamp va_list args; 441ac27a0ecSDave Kleikamp 442ac27a0ecSDave Kleikamp va_start(args, fmt); 443617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 444ac27a0ecSDave Kleikamp sb->s_id, function); 445ac27a0ecSDave Kleikamp vprintk(fmt, args); 446ac27a0ecSDave Kleikamp printk("\n"); 447ac27a0ecSDave Kleikamp va_end(args); 448ac27a0ecSDave Kleikamp } 449ac27a0ecSDave Kleikamp 4505d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 4515d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 4525d1b1b3fSAneesh Kumar K.V __releases(bitlock) 4535d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 4545d1b1b3fSAneesh Kumar K.V { 4555d1b1b3fSAneesh Kumar K.V va_list args; 4565d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4575d1b1b3fSAneesh Kumar K.V 4585d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 4595d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 4605d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 4615d1b1b3fSAneesh Kumar K.V printk("\n"); 4625d1b1b3fSAneesh Kumar K.V va_end(args); 4635d1b1b3fSAneesh Kumar K.V 4645d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 4655d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4665d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 467e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 4685d1b1b3fSAneesh Kumar K.V return; 4695d1b1b3fSAneesh Kumar K.V } 4705d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 4715d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 4725d1b1b3fSAneesh Kumar K.V /* 4735d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 4745d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 4755d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 4765d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 4775d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 4785d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 4795d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 4805d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 4815d1b1b3fSAneesh Kumar K.V * more appropriate error code. 4825d1b1b3fSAneesh Kumar K.V */ 4835d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 4845d1b1b3fSAneesh Kumar K.V return; 4855d1b1b3fSAneesh Kumar K.V } 4865d1b1b3fSAneesh Kumar K.V 487617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 488ac27a0ecSDave Kleikamp { 489617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 490ac27a0ecSDave Kleikamp 491617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 492ac27a0ecSDave Kleikamp return; 493ac27a0ecSDave Kleikamp 49446e665e9SHarvey Harrison ext4_warning(sb, __func__, 495ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 496ac27a0ecSDave Kleikamp "running e2fsck is recommended", 497617ba13bSMingming Cao EXT4_DYNAMIC_REV); 498ac27a0ecSDave Kleikamp 499617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 500617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 501617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 502ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 503ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 504ac27a0ecSDave Kleikamp 505ac27a0ecSDave Kleikamp /* 506ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 507ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 508ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 509ac27a0ecSDave Kleikamp */ 510ac27a0ecSDave Kleikamp } 511ac27a0ecSDave Kleikamp 512ac27a0ecSDave Kleikamp /* 513ac27a0ecSDave Kleikamp * Open the external journal device 514ac27a0ecSDave Kleikamp */ 515b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 516ac27a0ecSDave Kleikamp { 517ac27a0ecSDave Kleikamp struct block_device *bdev; 518ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 519ac27a0ecSDave Kleikamp 520ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 521ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 522ac27a0ecSDave Kleikamp goto fail; 523ac27a0ecSDave Kleikamp return bdev; 524ac27a0ecSDave Kleikamp 525ac27a0ecSDave Kleikamp fail: 526b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 527ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 528ac27a0ecSDave Kleikamp return NULL; 529ac27a0ecSDave Kleikamp } 530ac27a0ecSDave Kleikamp 531ac27a0ecSDave Kleikamp /* 532ac27a0ecSDave Kleikamp * Release the journal device 533ac27a0ecSDave Kleikamp */ 534617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 535ac27a0ecSDave Kleikamp { 536ac27a0ecSDave Kleikamp bd_release(bdev); 5379a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 538ac27a0ecSDave Kleikamp } 539ac27a0ecSDave Kleikamp 540617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 541ac27a0ecSDave Kleikamp { 542ac27a0ecSDave Kleikamp struct block_device *bdev; 543ac27a0ecSDave Kleikamp int ret = -ENODEV; 544ac27a0ecSDave Kleikamp 545ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 546ac27a0ecSDave Kleikamp if (bdev) { 547617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 548ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 549ac27a0ecSDave Kleikamp } 550ac27a0ecSDave Kleikamp return ret; 551ac27a0ecSDave Kleikamp } 552ac27a0ecSDave Kleikamp 553ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 554ac27a0ecSDave Kleikamp { 555617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 556ac27a0ecSDave Kleikamp } 557ac27a0ecSDave Kleikamp 558617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 559ac27a0ecSDave Kleikamp { 560ac27a0ecSDave Kleikamp struct list_head *l; 561ac27a0ecSDave Kleikamp 562b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 563ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 564ac27a0ecSDave Kleikamp 565ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 566ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 567ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 568ac27a0ecSDave Kleikamp printk(KERN_ERR " " 569ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 570ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 571ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 572ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 573ac27a0ecSDave Kleikamp } 574ac27a0ecSDave Kleikamp } 575ac27a0ecSDave Kleikamp 576617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 577ac27a0ecSDave Kleikamp { 578617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 579617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 580ef2cabf7SHidehiro Kawai int i, err; 581ac27a0ecSDave Kleikamp 582a9e220f8SAl Viro lock_super(sb); 5836cfd0148SChristoph Hellwig lock_kernel(); 5848c85e125SChristoph Hellwig if (sb->s_dirt) 585ebc1ac16SChristoph Hellwig ext4_commit_super(sb, 1); 5868c85e125SChristoph Hellwig 5876fd058f7STheodore Ts'o ext4_release_system_zone(sb); 588c9de560dSAlex Tomas ext4_mb_release(sb); 589a86c6181SAlex Tomas ext4_ext_release(sb); 590617ba13bSMingming Cao ext4_xattr_put_super(sb); 5910390131bSFrank Mayhar if (sbi->s_journal) { 592ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 59347b4a50bSJan Kara sbi->s_journal = NULL; 594ef2cabf7SHidehiro Kawai if (err < 0) 5950390131bSFrank Mayhar ext4_abort(sb, __func__, 5960390131bSFrank Mayhar "Couldn't clean up the journal"); 5970390131bSFrank Mayhar } 598ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 599617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 600ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 601e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 602ac27a0ecSDave Kleikamp } 603240799cdSTheodore Ts'o if (sbi->s_proc) { 6049f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 605240799cdSTheodore Ts'o } 6063197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 607ac27a0ecSDave Kleikamp 608ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 609ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 610ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 611c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 612c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 613c5ca7c76STheodore Ts'o else 614772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 615ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 616ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 617ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 6186bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 619ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 620ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 621ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 622ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 623ac27a0ecSDave Kleikamp #endif 624ac27a0ecSDave Kleikamp 625ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 626ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 627ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 628ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 629ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 630ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 631ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 632ac27a0ecSDave Kleikamp 633f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 634ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 635ac27a0ecSDave Kleikamp /* 636ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 637ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 638ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 639ac27a0ecSDave Kleikamp */ 640ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 641f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 642617ba13bSMingming Cao ext4_blkdev_remove(sbi); 643ac27a0ecSDave Kleikamp } 644ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 6453197ebdbSTheodore Ts'o /* 6463197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 6473197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 6483197ebdbSTheodore Ts'o */ 6493197ebdbSTheodore Ts'o unlock_kernel(); 6503197ebdbSTheodore Ts'o unlock_super(sb); 6513197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 6523197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 653705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 654ac27a0ecSDave Kleikamp kfree(sbi); 655ac27a0ecSDave Kleikamp } 656ac27a0ecSDave Kleikamp 657e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 658ac27a0ecSDave Kleikamp 659ac27a0ecSDave Kleikamp /* 660ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 661ac27a0ecSDave Kleikamp */ 662617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 663ac27a0ecSDave Kleikamp { 664617ba13bSMingming Cao struct ext4_inode_info *ei; 665ac27a0ecSDave Kleikamp 666e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 667ac27a0ecSDave Kleikamp if (!ei) 668ac27a0ecSDave Kleikamp return NULL; 6690b8e58a1SAndreas Dilger 670ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 67191246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 672a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 673c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 674c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 6750390131bSFrank Mayhar /* 6760390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 6770390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 6780390131bSFrank Mayhar * jinode. 6790390131bSFrank Mayhar */ 680678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 681d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 682d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 683d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 684d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 685d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 6860b8e58a1SAndreas Dilger 687ac27a0ecSDave Kleikamp return &ei->vfs_inode; 688ac27a0ecSDave Kleikamp } 689ac27a0ecSDave Kleikamp 690617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 691ac27a0ecSDave Kleikamp { 6929f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 693b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 694b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 695b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 6969f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 6979f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 6989f7dd93dSVasily Averin true); 6999f7dd93dSVasily Averin dump_stack(); 7009f7dd93dSVasily Averin } 701617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 702ac27a0ecSDave Kleikamp } 703ac27a0ecSDave Kleikamp 70451cc5068SAlexey Dobriyan static void init_once(void *foo) 705ac27a0ecSDave Kleikamp { 706617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 707ac27a0ecSDave Kleikamp 708ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 70903010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 710ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 711ac27a0ecSDave Kleikamp #endif 7120e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 713ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 714ac27a0ecSDave Kleikamp } 715ac27a0ecSDave Kleikamp 716ac27a0ecSDave Kleikamp static int init_inodecache(void) 717ac27a0ecSDave Kleikamp { 718617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 719617ba13bSMingming Cao sizeof(struct ext4_inode_info), 720ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 721ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 72220c2df83SPaul Mundt init_once); 723617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 724ac27a0ecSDave Kleikamp return -ENOMEM; 725ac27a0ecSDave Kleikamp return 0; 726ac27a0ecSDave Kleikamp } 727ac27a0ecSDave Kleikamp 728ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 729ac27a0ecSDave Kleikamp { 730617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 731ac27a0ecSDave Kleikamp } 732ac27a0ecSDave Kleikamp 733617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 734ac27a0ecSDave Kleikamp { 735c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 7360390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 737678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 738678aaf48SJan Kara &EXT4_I(inode)->jinode); 739ac27a0ecSDave Kleikamp } 740ac27a0ecSDave Kleikamp 7412b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 7422b2d6d01STheodore Ts'o struct super_block *sb) 743ac27a0ecSDave Kleikamp { 744ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 745617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 746ac27a0ecSDave Kleikamp 747ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 748ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 749ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); 750ac27a0ecSDave Kleikamp 751ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 752ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 753ac27a0ecSDave Kleikamp 754ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 755ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 756ac27a0ecSDave Kleikamp 757617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 758ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 759ac27a0ecSDave Kleikamp 760617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 761ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 762ac27a0ecSDave Kleikamp #endif 763ac27a0ecSDave Kleikamp } 764ac27a0ecSDave Kleikamp 765d9c9bef1SMiklos Szeredi /* 766d9c9bef1SMiklos Szeredi * Show an option if 767d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 768d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 769d9c9bef1SMiklos Szeredi */ 770617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 771ac27a0ecSDave Kleikamp { 772aa22df2cSAneesh Kumar K.V int def_errors; 773aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 774ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 775d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 776d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 777d9c9bef1SMiklos Szeredi 778d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 779aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 780d9c9bef1SMiklos Szeredi 781d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 782d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 783d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 784d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 785aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 786d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 787d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 788d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 789d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 790d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 791d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 792d9c9bef1SMiklos Szeredi } 793d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 794d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 795d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 796d9c9bef1SMiklos Szeredi } 797bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 798d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 799bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 800d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 801bb4f397aSAneesh Kumar K.V } 802bb4f397aSAneesh Kumar K.V } 803aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 804bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 805aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 806d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 807aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 808d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 809aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 810d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 811d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 812d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 81303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 814aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 815aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 816d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 817d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 818d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 819d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 820d9c9bef1SMiklos Szeredi } 821d9c9bef1SMiklos Szeredi #endif 82203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 823aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 824d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 825d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 826d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 827d9c9bef1SMiklos Szeredi #endif 82830773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 829d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 830d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 831d9c9bef1SMiklos Szeredi } 83230773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 83330773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 83430773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 83530773840STheodore Ts'o } 83630773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 83730773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 83830773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 83930773840STheodore Ts'o } 84030773840STheodore Ts'o 841571640caSEric Sandeen /* 842571640caSEric Sandeen * We're changing the default of barrier mount option, so 843571640caSEric Sandeen * let's always display its mount state so it's clear what its 844571640caSEric Sandeen * status is. 845571640caSEric Sandeen */ 846571640caSEric Sandeen seq_puts(seq, ",barrier="); 847571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 848cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 849cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 850d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 851d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 85225ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 85325ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 854dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 855dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 856dd919b98SAneesh Kumar K.V 857ac27a0ecSDave Kleikamp 858cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 859cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 860aa22df2cSAneesh Kumar K.V /* 861aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 862aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 863aa22df2cSAneesh Kumar K.V */ 864617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 865ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 866617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 867ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 868617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 869ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 870ac27a0ecSDave Kleikamp 871240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 872240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 873240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 874240799cdSTheodore Ts'o 8755bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 8765bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 8775bf5683aSHidehiro Kawai 878afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 87906705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 880afd4672dSTheodore Ts'o 881617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 8820b8e58a1SAndreas Dilger 883ac27a0ecSDave Kleikamp return 0; 884ac27a0ecSDave Kleikamp } 885ac27a0ecSDave Kleikamp 8861b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 8871b961ac0SChristoph Hellwig u64 ino, u32 generation) 888ac27a0ecSDave Kleikamp { 889ac27a0ecSDave Kleikamp struct inode *inode; 890ac27a0ecSDave Kleikamp 891617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 892ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 893617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 894ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 895ac27a0ecSDave Kleikamp 896ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 897ac27a0ecSDave Kleikamp * 898617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 899ac27a0ecSDave Kleikamp * deleted, so we should be safe. 900ac27a0ecSDave Kleikamp * 901ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 902ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 903ac27a0ecSDave Kleikamp */ 9041d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 9051d1fe1eeSDavid Howells if (IS_ERR(inode)) 9061d1fe1eeSDavid Howells return ERR_CAST(inode); 9071d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 908ac27a0ecSDave Kleikamp iput(inode); 909ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 910ac27a0ecSDave Kleikamp } 9111b961ac0SChristoph Hellwig 9121b961ac0SChristoph Hellwig return inode; 913ac27a0ecSDave Kleikamp } 9141b961ac0SChristoph Hellwig 9151b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 9161b961ac0SChristoph Hellwig int fh_len, int fh_type) 9171b961ac0SChristoph Hellwig { 9181b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 9191b961ac0SChristoph Hellwig ext4_nfs_get_inode); 9201b961ac0SChristoph Hellwig } 9211b961ac0SChristoph Hellwig 9221b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9231b961ac0SChristoph Hellwig int fh_len, int fh_type) 9241b961ac0SChristoph Hellwig { 9251b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 9261b961ac0SChristoph Hellwig ext4_nfs_get_inode); 927ac27a0ecSDave Kleikamp } 928ac27a0ecSDave Kleikamp 929c39a7f84SToshiyuki Okajima /* 930c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 931c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 932c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 933c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 934c39a7f84SToshiyuki Okajima */ 9350b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 9360b8e58a1SAndreas Dilger gfp_t wait) 937c39a7f84SToshiyuki Okajima { 938c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 939c39a7f84SToshiyuki Okajima 940c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 941c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 942c39a7f84SToshiyuki Okajima return 0; 943c39a7f84SToshiyuki Okajima if (journal) 944c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 945c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 946c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 947c39a7f84SToshiyuki Okajima } 948c39a7f84SToshiyuki Okajima 949ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 950ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 951ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 952ac27a0ecSDave Kleikamp 953617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 954617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 955617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 956617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 957617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 9586f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 9596f28e087SJan Kara char *path, int remount); 960617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 961617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 962ac27a0ecSDave Kleikamp size_t len, loff_t off); 963617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 964ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 965ac27a0ecSDave Kleikamp 966617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 967edf72453SJan Kara .initialize = dquot_initialize, 968edf72453SJan Kara .drop = dquot_drop, 969ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 97060e58e0fSMingming Cao .reserve_space = dquot_reserve_space, 97160e58e0fSMingming Cao .claim_space = dquot_claim_space, 97260e58e0fSMingming Cao .release_rsv = dquot_release_reserved_space, 97360e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 974ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 975ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 976ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 977ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 978617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 979617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 980617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 981617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 982a5b5ee32SJan Kara .write_info = ext4_write_info, 983a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 984a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 985ac27a0ecSDave Kleikamp }; 986ac27a0ecSDave Kleikamp 987617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 988617ba13bSMingming Cao .quota_on = ext4_quota_on, 989ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 990ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 991ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 992ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 993ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 994ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 995ac27a0ecSDave Kleikamp }; 996ac27a0ecSDave Kleikamp #endif 997ac27a0ecSDave Kleikamp 998ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 999617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1000617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1001617ba13bSMingming Cao .write_inode = ext4_write_inode, 1002617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 1003617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 1004617ba13bSMingming Cao .put_super = ext4_put_super, 1005617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1006c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1007c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1008617ba13bSMingming Cao .statfs = ext4_statfs, 1009617ba13bSMingming Cao .remount_fs = ext4_remount, 1010617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1011617ba13bSMingming Cao .show_options = ext4_show_options, 1012ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1013617ba13bSMingming Cao .quota_read = ext4_quota_read, 1014617ba13bSMingming Cao .quota_write = ext4_quota_write, 1015ac27a0ecSDave Kleikamp #endif 1016c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1017ac27a0ecSDave Kleikamp }; 1018ac27a0ecSDave Kleikamp 10199ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 10209ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 10219ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 10229ca92389STheodore Ts'o .write_inode = ext4_write_inode, 10239ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 10249ca92389STheodore Ts'o .delete_inode = ext4_delete_inode, 10259ca92389STheodore Ts'o .write_super = ext4_write_super, 10269ca92389STheodore Ts'o .put_super = ext4_put_super, 10279ca92389STheodore Ts'o .statfs = ext4_statfs, 10289ca92389STheodore Ts'o .remount_fs = ext4_remount, 10299ca92389STheodore Ts'o .clear_inode = ext4_clear_inode, 10309ca92389STheodore Ts'o .show_options = ext4_show_options, 10319ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 10329ca92389STheodore Ts'o .quota_read = ext4_quota_read, 10339ca92389STheodore Ts'o .quota_write = ext4_quota_write, 10349ca92389STheodore Ts'o #endif 10359ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 10369ca92389STheodore Ts'o }; 10379ca92389STheodore Ts'o 103839655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 10391b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 10401b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1041617ba13bSMingming Cao .get_parent = ext4_get_parent, 1042ac27a0ecSDave Kleikamp }; 1043ac27a0ecSDave Kleikamp 1044ac27a0ecSDave Kleikamp enum { 1045ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1046ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 104701436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1048ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 104906705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 105030773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1051c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1052818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1053ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1054f4033903SCurt Wohlgemuth Opt_data_err_abort, Opt_data_err_ignore, Opt_mb_history_length, 1055ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 1056ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 105706705bffSTheodore Ts'o Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, 105806705bffSTheodore Ts'o Opt_usrquota, Opt_grpquota, Opt_i_version, 105901436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 10606fd058f7STheodore Ts'o Opt_block_validity, Opt_noblock_validity, 1061b3881f74STheodore Ts'o Opt_inode_readahead_blks, Opt_journal_ioprio 1062ac27a0ecSDave Kleikamp }; 1063ac27a0ecSDave Kleikamp 1064a447c093SSteven Whitehouse static const match_table_t tokens = { 1065ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1066ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1067ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1068ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1069ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1070ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1071ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1072ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1073ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1074ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1075ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1076ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1077ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1078ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1079ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1080ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1081ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1082ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1083ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1084ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1085ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1086ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1087ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1088ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 108930773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 109030773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1091ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1092ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1093818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1094818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1095ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1096ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1097ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1098ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 10995bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 11005bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1101f4033903SCurt Wohlgemuth {Opt_mb_history_length, "mb_history_length=%u"}, 1102ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1103ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1104ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1105ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1106ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1107ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 1108ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1109ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1110ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1111ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1112ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 111306705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 111406705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 111525ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1116c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1117ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 111864769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1119dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 11206fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 11216fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1122240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1123b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1124afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 112506705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 112606705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1127f3f12faaSJosef Bacik {Opt_err, NULL}, 1128ac27a0ecSDave Kleikamp }; 1129ac27a0ecSDave Kleikamp 1130617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1131ac27a0ecSDave Kleikamp { 1132617ba13bSMingming Cao ext4_fsblk_t sb_block; 1133ac27a0ecSDave Kleikamp char *options = (char *) *data; 1134ac27a0ecSDave Kleikamp 1135ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1136ac27a0ecSDave Kleikamp return 1; /* Default location */ 11370b8e58a1SAndreas Dilger 1138ac27a0ecSDave Kleikamp options += 3; 11390b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1140ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1141ac27a0ecSDave Kleikamp if (*options && *options != ',') { 11424776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1143ac27a0ecSDave Kleikamp (char *) *data); 1144ac27a0ecSDave Kleikamp return 1; 1145ac27a0ecSDave Kleikamp } 1146ac27a0ecSDave Kleikamp if (*options == ',') 1147ac27a0ecSDave Kleikamp options++; 1148ac27a0ecSDave Kleikamp *data = (void *) options; 11490b8e58a1SAndreas Dilger 1150ac27a0ecSDave Kleikamp return sb_block; 1151ac27a0ecSDave Kleikamp } 1152ac27a0ecSDave Kleikamp 1153b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1154b3881f74STheodore Ts'o 1155ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1156c3191067STheodore Ts'o unsigned long *journal_devnum, 1157b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1158617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1159ac27a0ecSDave Kleikamp { 1160617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1161ac27a0ecSDave Kleikamp char *p; 1162ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1163ac27a0ecSDave Kleikamp int data_opt = 0; 1164ac27a0ecSDave Kleikamp int option; 1165ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1166dfc5d03fSJan Kara int qtype, qfmt; 1167ac27a0ecSDave Kleikamp char *qname; 1168ac27a0ecSDave Kleikamp #endif 1169ac27a0ecSDave Kleikamp 1170ac27a0ecSDave Kleikamp if (!options) 1171ac27a0ecSDave Kleikamp return 1; 1172ac27a0ecSDave Kleikamp 1173ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1174ac27a0ecSDave Kleikamp int token; 1175ac27a0ecSDave Kleikamp if (!*p) 1176ac27a0ecSDave Kleikamp continue; 1177ac27a0ecSDave Kleikamp 1178ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1179ac27a0ecSDave Kleikamp switch (token) { 1180ac27a0ecSDave Kleikamp case Opt_bsd_df: 1181ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1182ac27a0ecSDave Kleikamp break; 1183ac27a0ecSDave Kleikamp case Opt_minix_df: 1184ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1185ac27a0ecSDave Kleikamp break; 1186ac27a0ecSDave Kleikamp case Opt_grpid: 1187ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1188ac27a0ecSDave Kleikamp break; 1189ac27a0ecSDave Kleikamp case Opt_nogrpid: 1190ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1191ac27a0ecSDave Kleikamp break; 1192ac27a0ecSDave Kleikamp case Opt_resuid: 1193ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1194ac27a0ecSDave Kleikamp return 0; 1195ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1196ac27a0ecSDave Kleikamp break; 1197ac27a0ecSDave Kleikamp case Opt_resgid: 1198ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1199ac27a0ecSDave Kleikamp return 0; 1200ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1201ac27a0ecSDave Kleikamp break; 1202ac27a0ecSDave Kleikamp case Opt_sb: 1203ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1204ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1205ac27a0ecSDave Kleikamp break; 1206ac27a0ecSDave Kleikamp case Opt_err_panic: 1207ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1208ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1209ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1210ac27a0ecSDave Kleikamp break; 1211ac27a0ecSDave Kleikamp case Opt_err_ro: 1212ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1213ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1214ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1215ac27a0ecSDave Kleikamp break; 1216ac27a0ecSDave Kleikamp case Opt_err_cont: 1217ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1218ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1219ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1220ac27a0ecSDave Kleikamp break; 1221ac27a0ecSDave Kleikamp case Opt_nouid32: 1222ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1223ac27a0ecSDave Kleikamp break; 1224ac27a0ecSDave Kleikamp case Opt_debug: 1225ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1226ac27a0ecSDave Kleikamp break; 1227ac27a0ecSDave Kleikamp case Opt_oldalloc: 1228ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1229ac27a0ecSDave Kleikamp break; 1230ac27a0ecSDave Kleikamp case Opt_orlov: 1231ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1232ac27a0ecSDave Kleikamp break; 123303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1234ac27a0ecSDave Kleikamp case Opt_user_xattr: 1235ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1236ac27a0ecSDave Kleikamp break; 1237ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1238ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1239ac27a0ecSDave Kleikamp break; 1240ac27a0ecSDave Kleikamp #else 1241ac27a0ecSDave Kleikamp case Opt_user_xattr: 1242ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1243b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); 1244ac27a0ecSDave Kleikamp break; 1245ac27a0ecSDave Kleikamp #endif 124603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1247ac27a0ecSDave Kleikamp case Opt_acl: 1248ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1249ac27a0ecSDave Kleikamp break; 1250ac27a0ecSDave Kleikamp case Opt_noacl: 1251ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1252ac27a0ecSDave Kleikamp break; 1253ac27a0ecSDave Kleikamp #else 1254ac27a0ecSDave Kleikamp case Opt_acl: 1255ac27a0ecSDave Kleikamp case Opt_noacl: 1256b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); 1257ac27a0ecSDave Kleikamp break; 1258ac27a0ecSDave Kleikamp #endif 1259ac27a0ecSDave Kleikamp case Opt_journal_update: 1260ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1261ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1262ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1263ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1264ac27a0ecSDave Kleikamp journal file. */ 1265ac27a0ecSDave Kleikamp if (is_remount) { 1266b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1267b31e1552SEric Sandeen "Cannot specify journal on remount"); 1268ac27a0ecSDave Kleikamp return 0; 1269ac27a0ecSDave Kleikamp } 1270ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1271ac27a0ecSDave Kleikamp break; 1272ac27a0ecSDave Kleikamp case Opt_journal_dev: 1273ac27a0ecSDave Kleikamp if (is_remount) { 1274b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1275b31e1552SEric Sandeen "Cannot specify journal on remount"); 1276ac27a0ecSDave Kleikamp return 0; 1277ac27a0ecSDave Kleikamp } 1278ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1279ac27a0ecSDave Kleikamp return 0; 1280ac27a0ecSDave Kleikamp *journal_devnum = option; 1281ac27a0ecSDave Kleikamp break; 1282818d276cSGirish Shilamkar case Opt_journal_checksum: 1283818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1284818d276cSGirish Shilamkar break; 1285818d276cSGirish Shilamkar case Opt_journal_async_commit: 1286818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1287818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1288818d276cSGirish Shilamkar break; 1289ac27a0ecSDave Kleikamp case Opt_noload: 1290ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1291ac27a0ecSDave Kleikamp break; 1292ac27a0ecSDave Kleikamp case Opt_commit: 1293ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1294ac27a0ecSDave Kleikamp return 0; 1295ac27a0ecSDave Kleikamp if (option < 0) 1296ac27a0ecSDave Kleikamp return 0; 1297ac27a0ecSDave Kleikamp if (option == 0) 1298cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1299ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1300ac27a0ecSDave Kleikamp break; 130130773840STheodore Ts'o case Opt_max_batch_time: 130230773840STheodore Ts'o if (match_int(&args[0], &option)) 130330773840STheodore Ts'o return 0; 130430773840STheodore Ts'o if (option < 0) 130530773840STheodore Ts'o return 0; 130630773840STheodore Ts'o if (option == 0) 130730773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 130830773840STheodore Ts'o sbi->s_max_batch_time = option; 130930773840STheodore Ts'o break; 131030773840STheodore Ts'o case Opt_min_batch_time: 131130773840STheodore Ts'o if (match_int(&args[0], &option)) 131230773840STheodore Ts'o return 0; 131330773840STheodore Ts'o if (option < 0) 131430773840STheodore Ts'o return 0; 131530773840STheodore Ts'o sbi->s_min_batch_time = option; 131630773840STheodore Ts'o break; 1317ac27a0ecSDave Kleikamp case Opt_data_journal: 1318617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1319ac27a0ecSDave Kleikamp goto datacheck; 1320ac27a0ecSDave Kleikamp case Opt_data_ordered: 1321617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1322ac27a0ecSDave Kleikamp goto datacheck; 1323ac27a0ecSDave Kleikamp case Opt_data_writeback: 1324617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1325ac27a0ecSDave Kleikamp datacheck: 1326ac27a0ecSDave Kleikamp if (is_remount) { 1327617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1328ac27a0ecSDave Kleikamp != data_opt) { 1329b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1330b31e1552SEric Sandeen "Cannot change data mode on remount"); 1331ac27a0ecSDave Kleikamp return 0; 1332ac27a0ecSDave Kleikamp } 1333ac27a0ecSDave Kleikamp } else { 1334617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1335ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1336ac27a0ecSDave Kleikamp } 1337ac27a0ecSDave Kleikamp break; 13385bf5683aSHidehiro Kawai case Opt_data_err_abort: 13395bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13405bf5683aSHidehiro Kawai break; 13415bf5683aSHidehiro Kawai case Opt_data_err_ignore: 13425bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13435bf5683aSHidehiro Kawai break; 1344f4033903SCurt Wohlgemuth case Opt_mb_history_length: 1345f4033903SCurt Wohlgemuth if (match_int(&args[0], &option)) 1346f4033903SCurt Wohlgemuth return 0; 1347f4033903SCurt Wohlgemuth if (option < 0) 1348f4033903SCurt Wohlgemuth return 0; 1349f4033903SCurt Wohlgemuth sbi->s_mb_history_max = option; 1350f4033903SCurt Wohlgemuth break; 1351ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1352ac27a0ecSDave Kleikamp case Opt_usrjquota: 1353ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1354ac27a0ecSDave Kleikamp goto set_qf_name; 1355ac27a0ecSDave Kleikamp case Opt_grpjquota: 1356ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1357ac27a0ecSDave Kleikamp set_qf_name: 135817bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1359dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1360b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1361b31e1552SEric Sandeen "Cannot change journaled " 1362b31e1552SEric Sandeen "quota options when quota turned on"); 1363ac27a0ecSDave Kleikamp return 0; 1364ac27a0ecSDave Kleikamp } 1365ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1366ac27a0ecSDave Kleikamp if (!qname) { 1367b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1368b31e1552SEric Sandeen "Not enough memory for " 1369b31e1552SEric Sandeen "storing quotafile name"); 1370ac27a0ecSDave Kleikamp return 0; 1371ac27a0ecSDave Kleikamp } 1372ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1373ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1374b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1375b31e1552SEric Sandeen "%s quota file already " 1376b31e1552SEric Sandeen "specified", QTYPE2NAME(qtype)); 1377ac27a0ecSDave Kleikamp kfree(qname); 1378ac27a0ecSDave Kleikamp return 0; 1379ac27a0ecSDave Kleikamp } 1380ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1381ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1382b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1383b31e1552SEric Sandeen "quotafile must be on " 1384b31e1552SEric Sandeen "filesystem root"); 1385ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1386ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1387ac27a0ecSDave Kleikamp return 0; 1388ac27a0ecSDave Kleikamp } 1389ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1390ac27a0ecSDave Kleikamp break; 1391ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1392ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1393ac27a0ecSDave Kleikamp goto clear_qf_name; 1394ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1395ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1396ac27a0ecSDave Kleikamp clear_qf_name: 139717bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1398dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1399b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 14002c8be6b2SJan Kara "journaled quota options when " 1401b31e1552SEric Sandeen "quota turned on"); 1402ac27a0ecSDave Kleikamp return 0; 1403ac27a0ecSDave Kleikamp } 1404ac27a0ecSDave Kleikamp /* 1405ac27a0ecSDave Kleikamp * The space will be released later when all options 1406ac27a0ecSDave Kleikamp * are confirmed to be correct 1407ac27a0ecSDave Kleikamp */ 1408ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1409ac27a0ecSDave Kleikamp break; 1410ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1411dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1412dfc5d03fSJan Kara goto set_qf_format; 1413ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1414dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1415dfc5d03fSJan Kara set_qf_format: 141617bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1417dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1418b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change " 1419dfc5d03fSJan Kara "journaled quota options when " 1420b31e1552SEric Sandeen "quota turned on"); 1421dfc5d03fSJan Kara return 0; 1422dfc5d03fSJan Kara } 1423dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1424ac27a0ecSDave Kleikamp break; 1425ac27a0ecSDave Kleikamp case Opt_quota: 1426ac27a0ecSDave Kleikamp case Opt_usrquota: 1427ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1428ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1429ac27a0ecSDave Kleikamp break; 1430ac27a0ecSDave Kleikamp case Opt_grpquota: 1431ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1432ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1433ac27a0ecSDave Kleikamp break; 1434ac27a0ecSDave Kleikamp case Opt_noquota: 143517bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1436b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Cannot change quota " 1437b31e1552SEric Sandeen "options when quota turned on"); 1438ac27a0ecSDave Kleikamp return 0; 1439ac27a0ecSDave Kleikamp } 1440ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1441ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1442ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1443ac27a0ecSDave Kleikamp break; 1444ac27a0ecSDave Kleikamp #else 1445ac27a0ecSDave Kleikamp case Opt_quota: 1446ac27a0ecSDave Kleikamp case Opt_usrquota: 1447ac27a0ecSDave Kleikamp case Opt_grpquota: 1448b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1449b31e1552SEric Sandeen "quota options not supported"); 1450cd59e7b9SJan Kara break; 1451ac27a0ecSDave Kleikamp case Opt_usrjquota: 1452ac27a0ecSDave Kleikamp case Opt_grpjquota: 1453ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1454ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1455ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1456ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1457b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1458b31e1552SEric Sandeen "journaled quota options not supported"); 1459ac27a0ecSDave Kleikamp break; 1460ac27a0ecSDave Kleikamp case Opt_noquota: 1461ac27a0ecSDave Kleikamp break; 1462ac27a0ecSDave Kleikamp #endif 1463ac27a0ecSDave Kleikamp case Opt_abort: 14644ab2f15bSTheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 1465ac27a0ecSDave Kleikamp break; 146606705bffSTheodore Ts'o case Opt_nobarrier: 146706705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 146806705bffSTheodore Ts'o break; 1469ac27a0ecSDave Kleikamp case Opt_barrier: 147006705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 147106705bffSTheodore Ts'o set_opt(sbi->s_mount_opt, BARRIER); 147206705bffSTheodore Ts'o break; 147306705bffSTheodore Ts'o } 1474ac27a0ecSDave Kleikamp if (option) 1475ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1476ac27a0ecSDave Kleikamp else 1477ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1478ac27a0ecSDave Kleikamp break; 1479ac27a0ecSDave Kleikamp case Opt_ignore: 1480ac27a0ecSDave Kleikamp break; 1481ac27a0ecSDave Kleikamp case Opt_resize: 1482ac27a0ecSDave Kleikamp if (!is_remount) { 1483b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1484b31e1552SEric Sandeen "resize option only available " 1485b31e1552SEric Sandeen "for remount"); 1486ac27a0ecSDave Kleikamp return 0; 1487ac27a0ecSDave Kleikamp } 1488ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1489ac27a0ecSDave Kleikamp return 0; 1490ac27a0ecSDave Kleikamp *n_blocks_count = option; 1491ac27a0ecSDave Kleikamp break; 1492ac27a0ecSDave Kleikamp case Opt_nobh: 1493ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1494ac27a0ecSDave Kleikamp break; 1495ac27a0ecSDave Kleikamp case Opt_bh: 1496ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1497ac27a0ecSDave Kleikamp break; 149825ec56b5SJean Noel Cordenner case Opt_i_version: 149925ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 150025ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 150125ec56b5SJean Noel Cordenner break; 1502dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1503dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1504dd919b98SAneesh Kumar K.V break; 1505c9de560dSAlex Tomas case Opt_stripe: 1506c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1507c9de560dSAlex Tomas return 0; 1508c9de560dSAlex Tomas if (option < 0) 1509c9de560dSAlex Tomas return 0; 1510c9de560dSAlex Tomas sbi->s_stripe = option; 1511c9de560dSAlex Tomas break; 151264769240SAlex Tomas case Opt_delalloc: 151364769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 151464769240SAlex Tomas break; 15156fd058f7STheodore Ts'o case Opt_block_validity: 15166fd058f7STheodore Ts'o set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 15176fd058f7STheodore Ts'o break; 15186fd058f7STheodore Ts'o case Opt_noblock_validity: 15196fd058f7STheodore Ts'o clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); 15206fd058f7STheodore Ts'o break; 1521240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1522240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1523240799cdSTheodore Ts'o return 0; 1524240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1525240799cdSTheodore Ts'o return 0; 1526f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 1527b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1528b31e1552SEric Sandeen "EXT4-fs: inode_readahead_blks" 1529b31e1552SEric Sandeen " must be a power of 2"); 15303197ebdbSTheodore Ts'o return 0; 15313197ebdbSTheodore Ts'o } 1532240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1533240799cdSTheodore Ts'o break; 1534b3881f74STheodore Ts'o case Opt_journal_ioprio: 1535b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1536b3881f74STheodore Ts'o return 0; 1537b3881f74STheodore Ts'o if (option < 0 || option > 7) 1538b3881f74STheodore Ts'o break; 1539b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1540b3881f74STheodore Ts'o option); 1541b3881f74STheodore Ts'o break; 154206705bffSTheodore Ts'o case Opt_noauto_da_alloc: 154306705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 154406705bffSTheodore Ts'o break; 1545afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 154606705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 154706705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 154806705bffSTheodore Ts'o break; 154906705bffSTheodore Ts'o } 1550afd4672dSTheodore Ts'o if (option) 1551afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1552afd4672dSTheodore Ts'o else 1553afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1554afd4672dSTheodore Ts'o break; 1555ac27a0ecSDave Kleikamp default: 1556b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1557b31e1552SEric Sandeen "Unrecognized mount option \"%s\" " 1558b31e1552SEric Sandeen "or missing value", p); 1559ac27a0ecSDave Kleikamp return 0; 1560ac27a0ecSDave Kleikamp } 1561ac27a0ecSDave Kleikamp } 1562ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1563ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1564617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1565ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1566ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1567ac27a0ecSDave Kleikamp 1568617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1569ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1570ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1571ac27a0ecSDave Kleikamp 1572ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1573617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1574ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1575617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1576b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1577b31e1552SEric Sandeen "format mixing"); 1578ac27a0ecSDave Kleikamp return 0; 1579ac27a0ecSDave Kleikamp } 1580ac27a0ecSDave Kleikamp 1581ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1582b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1583b31e1552SEric Sandeen "not specified"); 1584ac27a0ecSDave Kleikamp return 0; 1585ac27a0ecSDave Kleikamp } 1586ac27a0ecSDave Kleikamp } else { 1587ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1588b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 15892c8be6b2SJan Kara "specified with no journaling " 1590b31e1552SEric Sandeen "enabled"); 1591ac27a0ecSDave Kleikamp return 0; 1592ac27a0ecSDave Kleikamp } 1593ac27a0ecSDave Kleikamp } 1594ac27a0ecSDave Kleikamp #endif 1595ac27a0ecSDave Kleikamp return 1; 1596ac27a0ecSDave Kleikamp } 1597ac27a0ecSDave Kleikamp 1598617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1599ac27a0ecSDave Kleikamp int read_only) 1600ac27a0ecSDave Kleikamp { 1601617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1602ac27a0ecSDave Kleikamp int res = 0; 1603ac27a0ecSDave Kleikamp 1604617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1605b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1606b31e1552SEric Sandeen "forcing read-only mode"); 1607ac27a0ecSDave Kleikamp res = MS_RDONLY; 1608ac27a0ecSDave Kleikamp } 1609ac27a0ecSDave Kleikamp if (read_only) 1610ac27a0ecSDave Kleikamp return res; 1611617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1612b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1613b31e1552SEric Sandeen "running e2fsck is recommended"); 1614617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1615b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1616b31e1552SEric Sandeen "warning: mounting fs with errors, " 1617b31e1552SEric Sandeen "running e2fsck is recommended"); 1618ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1619ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1620ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1621b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1622b31e1552SEric Sandeen "warning: maximal mount count reached, " 1623b31e1552SEric Sandeen "running e2fsck is recommended"); 1624ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1625ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1626ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1627b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1628b31e1552SEric Sandeen "warning: checktime reached, " 1629b31e1552SEric Sandeen "running e2fsck is recommended"); 16300390131bSFrank Mayhar if (!sbi->s_journal) 1631216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1632ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1633617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1634e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1635ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1636617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 16370390131bSFrank Mayhar if (sbi->s_journal) 1638617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1639ac27a0ecSDave Kleikamp 1640e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1641ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1642a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 16437f4520ccSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x]\n", 1644ac27a0ecSDave Kleikamp sb->s_blocksize, 1645ac27a0ecSDave Kleikamp sbi->s_groups_count, 1646617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1647617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1648ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1649ac27a0ecSDave Kleikamp 16500390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 1651b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%s journal on %s", 1652b31e1552SEric Sandeen EXT4_SB(sb)->s_journal->j_inode ? "internal" : 165305496769STheodore Ts'o "external", EXT4_SB(sb)->s_journal->j_devname); 16540390131bSFrank Mayhar } else { 1655b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "no journal"); 16560390131bSFrank Mayhar } 1657ac27a0ecSDave Kleikamp return res; 1658ac27a0ecSDave Kleikamp } 1659ac27a0ecSDave Kleikamp 1660772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1661772cb7c8SJose R. Santos { 1662772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1663772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1664772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1665772cb7c8SJose R. Santos ext4_group_t flex_group; 1666772cb7c8SJose R. Santos int groups_per_flex = 0; 1667c5ca7c76STheodore Ts'o size_t size; 1668772cb7c8SJose R. Santos int i; 1669772cb7c8SJose R. Santos 1670772cb7c8SJose R. Santos if (!sbi->s_es->s_log_groups_per_flex) { 1671772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1672772cb7c8SJose R. Santos return 1; 1673772cb7c8SJose R. Santos } 1674772cb7c8SJose R. Santos 1675772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1676772cb7c8SJose R. Santos groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1677772cb7c8SJose R. Santos 1678c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1679c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1680d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1681d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1682c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1683c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1684c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1685c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1686c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1687c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1688c5ca7c76STheodore Ts'o } 1689772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1690b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory for " 1691b31e1552SEric Sandeen "%u flex groups", flex_group_count); 1692772cb7c8SJose R. Santos goto failed; 1693772cb7c8SJose R. Santos } 1694772cb7c8SJose R. Santos 1695772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 169688b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1697772cb7c8SJose R. Santos 1698772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 16999f24e420STheodore Ts'o atomic_set(&sbi->s_flex_groups[flex_group].free_inodes, 17009f24e420STheodore Ts'o ext4_free_inodes_count(sb, gdp)); 17019f24e420STheodore Ts'o atomic_set(&sbi->s_flex_groups[flex_group].free_blocks, 17029f24e420STheodore Ts'o ext4_free_blks_count(sb, gdp)); 17037d39db14STheodore Ts'o atomic_set(&sbi->s_flex_groups[flex_group].used_dirs, 17047d39db14STheodore Ts'o ext4_used_dirs_count(sb, gdp)); 1705772cb7c8SJose R. Santos } 1706772cb7c8SJose R. Santos 1707772cb7c8SJose R. Santos return 1; 1708772cb7c8SJose R. Santos failed: 1709772cb7c8SJose R. Santos return 0; 1710772cb7c8SJose R. Santos } 1711772cb7c8SJose R. Santos 1712717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1713717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1714717d50e4SAndreas Dilger { 1715717d50e4SAndreas Dilger __u16 crc = 0; 1716717d50e4SAndreas Dilger 1717717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1718717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1719717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1720717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1721717d50e4SAndreas Dilger 1722717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1723717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1724717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1725717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1726717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1727717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1728717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1729717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1730717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1731717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1732717d50e4SAndreas Dilger offset); 1733717d50e4SAndreas Dilger } 1734717d50e4SAndreas Dilger 1735717d50e4SAndreas Dilger return cpu_to_le16(crc); 1736717d50e4SAndreas Dilger } 1737717d50e4SAndreas Dilger 1738717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1739717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1740717d50e4SAndreas Dilger { 1741717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1742717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1743717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1744717d50e4SAndreas Dilger return 0; 1745717d50e4SAndreas Dilger 1746717d50e4SAndreas Dilger return 1; 1747717d50e4SAndreas Dilger } 1748717d50e4SAndreas Dilger 1749ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1750617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1751ac27a0ecSDave Kleikamp { 1752617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1753617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1754617ba13bSMingming Cao ext4_fsblk_t last_block; 1755bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1756bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1757bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1758ce421581SJose R. Santos int flexbg_flag = 0; 1759fd2d4291SAvantika Mathur ext4_group_t i; 1760ac27a0ecSDave Kleikamp 1761ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1762ce421581SJose R. Santos flexbg_flag = 1; 1763ce421581SJose R. Santos 1764617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1765ac27a0ecSDave Kleikamp 1766197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1767197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1768197cd65aSAkinobu Mita 1769ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1770bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1771ac27a0ecSDave Kleikamp else 1772ac27a0ecSDave Kleikamp last_block = first_block + 1773617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1774ac27a0ecSDave Kleikamp 17758fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 17762b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1777b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1778a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 1779b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 1780ac27a0ecSDave Kleikamp return 0; 1781ac27a0ecSDave Kleikamp } 17828fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 17832b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1784b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1785a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 1786b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 1787ac27a0ecSDave Kleikamp return 0; 1788ac27a0ecSDave Kleikamp } 17898fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1790bd81d8eeSLaurent Vivier if (inode_table < first_block || 17912b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1792b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1793a9df9a49STheodore Ts'o "Inode table for group %u not in group " 1794b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 1795ac27a0ecSDave Kleikamp return 0; 1796ac27a0ecSDave Kleikamp } 1797955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 1798717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1799b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 1800b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 1801fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1802fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 18037ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 1804955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1805717d50e4SAndreas Dilger return 0; 1806717d50e4SAndreas Dilger } 18077ee1ec4cSLi Zefan } 1808955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 1809ce421581SJose R. Santos if (!flexbg_flag) 1810617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1811ac27a0ecSDave Kleikamp } 1812ac27a0ecSDave Kleikamp 1813bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1814617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 1815ac27a0ecSDave Kleikamp return 1; 1816ac27a0ecSDave Kleikamp } 1817ac27a0ecSDave Kleikamp 1818617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1819ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1820ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1821ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1822ac27a0ecSDave Kleikamp * 1823ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1824ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1825ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1826ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1827ac27a0ecSDave Kleikamp * 1828ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1829ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1830ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1831617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1832ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1833ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1834ac27a0ecSDave Kleikamp */ 1835617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1836617ba13bSMingming Cao struct ext4_super_block *es) 1837ac27a0ecSDave Kleikamp { 1838ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1839ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1840ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1841ac27a0ecSDave Kleikamp int i; 1842ac27a0ecSDave Kleikamp #endif 1843ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1844ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1845ac27a0ecSDave Kleikamp return; 1846ac27a0ecSDave Kleikamp } 1847ac27a0ecSDave Kleikamp 1848a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1849b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 1850b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 1851a8f48a95SEric Sandeen return; 1852a8f48a95SEric Sandeen } 1853a8f48a95SEric Sandeen 1854617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1855ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1856ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1857ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1858ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1859ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1860ac27a0ecSDave Kleikamp return; 1861ac27a0ecSDave Kleikamp } 1862ac27a0ecSDave Kleikamp 1863ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1864b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 1865ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1866ac27a0ecSDave Kleikamp } 1867ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1868ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1869ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1870ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1871ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1872617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1873617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1874ac27a0ecSDave Kleikamp if (ret < 0) 1875b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 1876b31e1552SEric Sandeen "Cannot turn on journaled " 1877b31e1552SEric Sandeen "quota: error %d", ret); 1878ac27a0ecSDave Kleikamp } 1879ac27a0ecSDave Kleikamp } 1880ac27a0ecSDave Kleikamp #endif 1881ac27a0ecSDave Kleikamp 1882ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1883ac27a0ecSDave Kleikamp struct inode *inode; 1884ac27a0ecSDave Kleikamp 188597bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 188697bd42b9SJosef Bacik if (IS_ERR(inode)) { 1887ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1888ac27a0ecSDave Kleikamp break; 1889ac27a0ecSDave Kleikamp } 1890ac27a0ecSDave Kleikamp 1891617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1892a269eb18SJan Kara vfs_dq_init(inode); 1893ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1894b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1895b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 189646e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1897e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1898ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1899617ba13bSMingming Cao ext4_truncate(inode); 1900ac27a0ecSDave Kleikamp nr_truncates++; 1901ac27a0ecSDave Kleikamp } else { 1902b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 1903b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 190446e665e9SHarvey Harrison __func__, inode->i_ino); 1905ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1906ac27a0ecSDave Kleikamp inode->i_ino); 1907ac27a0ecSDave Kleikamp nr_orphans++; 1908ac27a0ecSDave Kleikamp } 1909ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1910ac27a0ecSDave Kleikamp } 1911ac27a0ecSDave Kleikamp 1912ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 1913ac27a0ecSDave Kleikamp 1914ac27a0ecSDave Kleikamp if (nr_orphans) 1915b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 1916b31e1552SEric Sandeen PLURAL(nr_orphans)); 1917ac27a0ecSDave Kleikamp if (nr_truncates) 1918b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 1919b31e1552SEric Sandeen PLURAL(nr_truncates)); 1920ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1921ac27a0ecSDave Kleikamp /* Turn quotas off */ 1922ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1923ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 19246f28e087SJan Kara vfs_quota_off(sb, i, 0); 1925ac27a0ecSDave Kleikamp } 1926ac27a0ecSDave Kleikamp #endif 1927ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1928ac27a0ecSDave Kleikamp } 19290b8e58a1SAndreas Dilger 1930cd2291a4SEric Sandeen /* 1931cd2291a4SEric Sandeen * Maximal extent format file size. 1932cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1933cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1934cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1935cd2291a4SEric Sandeen * so that won't be a limiting factor. 1936cd2291a4SEric Sandeen * 1937cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1938cd2291a4SEric Sandeen */ 1939f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 1940cd2291a4SEric Sandeen { 1941cd2291a4SEric Sandeen loff_t res; 1942cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1943cd2291a4SEric Sandeen 1944cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1945f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 1946cd2291a4SEric Sandeen /* 194790c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 1948cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1949cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1950cd2291a4SEric Sandeen */ 1951cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1952cd2291a4SEric Sandeen 1953cd2291a4SEric Sandeen /* total blocks in file system block size */ 1954cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1955cd2291a4SEric Sandeen upper_limit <<= blkbits; 1956cd2291a4SEric Sandeen } 1957cd2291a4SEric Sandeen 1958cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1959cd2291a4SEric Sandeen res = 1LL << 32; 1960cd2291a4SEric Sandeen res <<= blkbits; 1961cd2291a4SEric Sandeen res -= 1; 1962cd2291a4SEric Sandeen 1963cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1964cd2291a4SEric Sandeen if (res > upper_limit) 1965cd2291a4SEric Sandeen res = upper_limit; 1966cd2291a4SEric Sandeen 1967cd2291a4SEric Sandeen return res; 1968cd2291a4SEric Sandeen } 1969ac27a0ecSDave Kleikamp 1970ac27a0ecSDave Kleikamp /* 1971cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 19720fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 19730fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1974ac27a0ecSDave Kleikamp */ 1975f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 1976ac27a0ecSDave Kleikamp { 1977617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 19780fc1b451SAneesh Kumar K.V int meta_blocks; 19790fc1b451SAneesh Kumar K.V loff_t upper_limit; 19800b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 19810b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 19820b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 19830b8e58a1SAndreas Dilger * 19840b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 19850b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 19860fc1b451SAneesh Kumar K.V */ 19870fc1b451SAneesh Kumar K.V 1988f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 19890fc1b451SAneesh Kumar K.V /* 199090c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 19910b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 19920b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 19930fc1b451SAneesh Kumar K.V */ 19940fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 19950fc1b451SAneesh Kumar K.V 19960fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 19970fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 19980fc1b451SAneesh Kumar K.V 19990fc1b451SAneesh Kumar K.V } else { 20008180a562SAneesh Kumar K.V /* 20018180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 20028180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 20038180a562SAneesh Kumar K.V * represent total number of blocks in 20048180a562SAneesh Kumar K.V * file system block size 20058180a562SAneesh Kumar K.V */ 20060fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 20070fc1b451SAneesh Kumar K.V 20080fc1b451SAneesh Kumar K.V } 20090fc1b451SAneesh Kumar K.V 20100fc1b451SAneesh Kumar K.V /* indirect blocks */ 20110fc1b451SAneesh Kumar K.V meta_blocks = 1; 20120fc1b451SAneesh Kumar K.V /* double indirect blocks */ 20130fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 20140fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 20150fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 20160fc1b451SAneesh Kumar K.V 20170fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 20180fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2019ac27a0ecSDave Kleikamp 2020ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2021ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2022ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2023ac27a0ecSDave Kleikamp res <<= bits; 2024ac27a0ecSDave Kleikamp if (res > upper_limit) 2025ac27a0ecSDave Kleikamp res = upper_limit; 20260fc1b451SAneesh Kumar K.V 20270fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 20280fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 20290fc1b451SAneesh Kumar K.V 2030ac27a0ecSDave Kleikamp return res; 2031ac27a0ecSDave Kleikamp } 2032ac27a0ecSDave Kleikamp 2033617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 203470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2035ac27a0ecSDave Kleikamp { 2036617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2037fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2038ac27a0ecSDave Kleikamp int has_super = 0; 2039ac27a0ecSDave Kleikamp 2040ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2041ac27a0ecSDave Kleikamp 2042617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2043ac27a0ecSDave Kleikamp nr < first_meta_bg) 204470bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2045ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2046617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2047ac27a0ecSDave Kleikamp has_super = 1; 20480b8e58a1SAndreas Dilger 2049617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2050ac27a0ecSDave Kleikamp } 2051ac27a0ecSDave Kleikamp 2052c9de560dSAlex Tomas /** 2053c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2054c9de560dSAlex Tomas * @sbi: In memory super block info 2055c9de560dSAlex Tomas * 2056c9de560dSAlex Tomas * If we have specified it via mount option, then 2057c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2058c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2059c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2060c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2061c9de560dSAlex Tomas * 2062c9de560dSAlex Tomas */ 2063c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2064c9de560dSAlex Tomas { 2065c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2066c9de560dSAlex Tomas unsigned long stripe_width = 2067c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2068c9de560dSAlex Tomas 2069c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2070c9de560dSAlex Tomas return sbi->s_stripe; 2071c9de560dSAlex Tomas 2072c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2073c9de560dSAlex Tomas return stripe_width; 2074c9de560dSAlex Tomas 2075c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2076c9de560dSAlex Tomas return stride; 2077c9de560dSAlex Tomas 2078c9de560dSAlex Tomas return 0; 2079c9de560dSAlex Tomas } 2080ac27a0ecSDave Kleikamp 20813197ebdbSTheodore Ts'o /* sysfs supprt */ 20823197ebdbSTheodore Ts'o 20833197ebdbSTheodore Ts'o struct ext4_attr { 20843197ebdbSTheodore Ts'o struct attribute attr; 20853197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 20863197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 20873197ebdbSTheodore Ts'o const char *, size_t); 20883197ebdbSTheodore Ts'o int offset; 20893197ebdbSTheodore Ts'o }; 20903197ebdbSTheodore Ts'o 20913197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 20923197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 20933197ebdbSTheodore Ts'o { 20943197ebdbSTheodore Ts'o char *endp; 20953197ebdbSTheodore Ts'o 20963197ebdbSTheodore Ts'o while (*buf && isspace(*buf)) 20973197ebdbSTheodore Ts'o buf++; 20983197ebdbSTheodore Ts'o *value = simple_strtoul(buf, &endp, 0); 20993197ebdbSTheodore Ts'o while (*endp && isspace(*endp)) 21003197ebdbSTheodore Ts'o endp++; 21013197ebdbSTheodore Ts'o if (*endp || *value > max) 21023197ebdbSTheodore Ts'o return -EINVAL; 21033197ebdbSTheodore Ts'o 21043197ebdbSTheodore Ts'o return 0; 21053197ebdbSTheodore Ts'o } 21063197ebdbSTheodore Ts'o 21073197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 21083197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21093197ebdbSTheodore Ts'o char *buf) 21103197ebdbSTheodore Ts'o { 21113197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 21123197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 21133197ebdbSTheodore Ts'o } 21143197ebdbSTheodore Ts'o 21153197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 21163197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21173197ebdbSTheodore Ts'o { 21183197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 21193197ebdbSTheodore Ts'o 21203197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 21213197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 21223197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 21233197ebdbSTheodore Ts'o } 21243197ebdbSTheodore Ts'o 21253197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 21263197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21273197ebdbSTheodore Ts'o { 21283197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 21293197ebdbSTheodore Ts'o 21303197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 21313197ebdbSTheodore Ts'o sbi->s_kbytes_written + 21323197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 21333197ebdbSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 21343197ebdbSTheodore Ts'o } 21353197ebdbSTheodore Ts'o 21363197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 21373197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21383197ebdbSTheodore Ts'o const char *buf, size_t count) 21393197ebdbSTheodore Ts'o { 21403197ebdbSTheodore Ts'o unsigned long t; 21413197ebdbSTheodore Ts'o 21423197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 21433197ebdbSTheodore Ts'o return -EINVAL; 21443197ebdbSTheodore Ts'o 2145f7c43950STheodore Ts'o if (!is_power_of_2(t)) 21463197ebdbSTheodore Ts'o return -EINVAL; 21473197ebdbSTheodore Ts'o 21483197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 21493197ebdbSTheodore Ts'o return count; 21503197ebdbSTheodore Ts'o } 21513197ebdbSTheodore Ts'o 21523197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 21533197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21543197ebdbSTheodore Ts'o { 21553197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 21563197ebdbSTheodore Ts'o 21573197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 21583197ebdbSTheodore Ts'o } 21593197ebdbSTheodore Ts'o 21603197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 21613197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21623197ebdbSTheodore Ts'o const char *buf, size_t count) 21633197ebdbSTheodore Ts'o { 21643197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 21653197ebdbSTheodore Ts'o unsigned long t; 21663197ebdbSTheodore Ts'o 21673197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 21683197ebdbSTheodore Ts'o return -EINVAL; 21693197ebdbSTheodore Ts'o *ui = t; 21703197ebdbSTheodore Ts'o return count; 21713197ebdbSTheodore Ts'o } 21723197ebdbSTheodore Ts'o 21733197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 21743197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 21753197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 21763197ebdbSTheodore Ts'o .show = _show, \ 21773197ebdbSTheodore Ts'o .store = _store, \ 21783197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 21793197ebdbSTheodore Ts'o } 21803197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 21813197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 21823197ebdbSTheodore Ts'o 21833197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 21843197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 21853197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 21863197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 21873197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 21883197ebdbSTheodore Ts'o 21893197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 21903197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 21913197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 21923197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 21933197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 219411013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 21953197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 21963197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 21973197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 21983197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 21993197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 22003197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 22013197ebdbSTheodore Ts'o 22023197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 22033197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 22043197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 22053197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 22063197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 220711013911SAndreas Dilger ATTR_LIST(inode_goal), 22083197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 22093197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 22103197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 22113197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 22123197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 22133197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 22143197ebdbSTheodore Ts'o NULL, 22153197ebdbSTheodore Ts'o }; 22163197ebdbSTheodore Ts'o 22173197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 22183197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 22193197ebdbSTheodore Ts'o { 22203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22213197ebdbSTheodore Ts'o s_kobj); 22223197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 22233197ebdbSTheodore Ts'o 22243197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 22253197ebdbSTheodore Ts'o } 22263197ebdbSTheodore Ts'o 22273197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 22283197ebdbSTheodore Ts'o struct attribute *attr, 22293197ebdbSTheodore Ts'o const char *buf, size_t len) 22303197ebdbSTheodore Ts'o { 22313197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22323197ebdbSTheodore Ts'o s_kobj); 22333197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 22343197ebdbSTheodore Ts'o 22353197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 22363197ebdbSTheodore Ts'o } 22373197ebdbSTheodore Ts'o 22383197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 22393197ebdbSTheodore Ts'o { 22403197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 22413197ebdbSTheodore Ts'o s_kobj); 22423197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 22433197ebdbSTheodore Ts'o } 22443197ebdbSTheodore Ts'o 22453197ebdbSTheodore Ts'o 22463197ebdbSTheodore Ts'o static struct sysfs_ops ext4_attr_ops = { 22473197ebdbSTheodore Ts'o .show = ext4_attr_show, 22483197ebdbSTheodore Ts'o .store = ext4_attr_store, 22493197ebdbSTheodore Ts'o }; 22503197ebdbSTheodore Ts'o 22513197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 22523197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 22533197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 22543197ebdbSTheodore Ts'o .release = ext4_sb_release, 22553197ebdbSTheodore Ts'o }; 22563197ebdbSTheodore Ts'o 2257617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 22587477827fSAneesh Kumar K.V __releases(kernel_lock) 22597477827fSAneesh Kumar K.V __acquires(kernel_lock) 2260ac27a0ecSDave Kleikamp { 2261ac27a0ecSDave Kleikamp struct buffer_head *bh; 2262617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2263617ba13bSMingming Cao struct ext4_sb_info *sbi; 2264617ba13bSMingming Cao ext4_fsblk_t block; 2265617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 226670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2267ac27a0ecSDave Kleikamp unsigned long offset = 0; 2268ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2269ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2270ac27a0ecSDave Kleikamp struct inode *root; 22719f6200bbSTheodore Ts'o char *cp; 22720390131bSFrank Mayhar const char *descr; 22731d1fe1eeSDavid Howells int ret = -EINVAL; 2274ac27a0ecSDave Kleikamp int blocksize; 22754ec11028STheodore Ts'o unsigned int db_count; 22764ec11028STheodore Ts'o unsigned int i; 2277f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 22783a06d778SAneesh Kumar K.V int features; 2279bd81d8eeSLaurent Vivier __u64 blocks_count; 2280833f4077SPeter Zijlstra int err; 2281b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2282ac27a0ecSDave Kleikamp 2283ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2284ac27a0ecSDave Kleikamp if (!sbi) 2285ac27a0ecSDave Kleikamp return -ENOMEM; 2286705895b6SPekka Enberg 2287705895b6SPekka Enberg sbi->s_blockgroup_lock = 2288705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2289705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2290705895b6SPekka Enberg kfree(sbi); 2291705895b6SPekka Enberg return -ENOMEM; 2292705895b6SPekka Enberg } 2293ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2294ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2295617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2296617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2297240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2298d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2299afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2300afc32f7eSTheodore Ts'o sectors[1]); 2301ac27a0ecSDave Kleikamp 2302ac27a0ecSDave Kleikamp unlock_kernel(); 2303ac27a0ecSDave Kleikamp 23049f6200bbSTheodore Ts'o /* Cleanup superblock name */ 23059f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 23069f6200bbSTheodore Ts'o *cp = '!'; 23079f6200bbSTheodore Ts'o 2308617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2309ac27a0ecSDave Kleikamp if (!blocksize) { 2310b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 2311ac27a0ecSDave Kleikamp goto out_fail; 2312ac27a0ecSDave Kleikamp } 2313ac27a0ecSDave Kleikamp 2314ac27a0ecSDave Kleikamp /* 2315617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2316ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2317ac27a0ecSDave Kleikamp */ 2318617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 231970bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 232070bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2321ac27a0ecSDave Kleikamp } else { 232270bbb3e0SAndrew Morton logical_sb_block = sb_block; 2323ac27a0ecSDave Kleikamp } 2324ac27a0ecSDave Kleikamp 232570bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2326b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 2327ac27a0ecSDave Kleikamp goto out_fail; 2328ac27a0ecSDave Kleikamp } 2329ac27a0ecSDave Kleikamp /* 2330ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2331617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2332ac27a0ecSDave Kleikamp */ 2333617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2334ac27a0ecSDave Kleikamp sbi->s_es = es; 2335ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2336617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2337617ba13bSMingming Cao goto cantfind_ext4; 2338afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2339ac27a0ecSDave Kleikamp 2340ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2341ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2342617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2343ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2344617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 2345ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2346617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2347ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 234803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2349617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2350ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 23512e7842b8SHugh Dickins #endif 235203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2353617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2354ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 23552e7842b8SHugh Dickins #endif 2356617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2357617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 2358617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2359617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 2360617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2361617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 2362ac27a0ecSDave Kleikamp 2363617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2364ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2365bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2366ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2367bb4f397aSAneesh Kumar K.V else 2368bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2369ac27a0ecSDave Kleikamp 2370ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2371ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 237230773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 237330773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 237430773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2375f4033903SCurt Wohlgemuth sbi->s_mb_history_max = default_mb_history_length; 2376ac27a0ecSDave Kleikamp 2377571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2378ac27a0ecSDave Kleikamp 23791e2462f9SMingming Cao /* 2380dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2381dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2382dd919b98SAneesh Kumar K.V */ 2383dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2384dd919b98SAneesh Kumar K.V 2385b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2386b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2387ac27a0ecSDave Kleikamp goto failed_mount; 2388ac27a0ecSDave Kleikamp 2389ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2390617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2391ac27a0ecSDave Kleikamp 2392617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2393617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2394617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2395617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2396b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 2397b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 2398b31e1552SEric Sandeen "running e2fsck is recommended"); 2399469108ffSTheodore Tso 2400469108ffSTheodore Tso /* 2401ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2402ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2403ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2404ac27a0ecSDave Kleikamp */ 2405617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 2406ac27a0ecSDave Kleikamp if (features) { 2407b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2408b31e1552SEric Sandeen "Couldn't mount because of " 2409b31e1552SEric Sandeen "unsupported optional features (%x)", 24103a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 24113a06d778SAneesh Kumar K.V ~EXT4_FEATURE_INCOMPAT_SUPP)); 2412ac27a0ecSDave Kleikamp goto failed_mount; 2413ac27a0ecSDave Kleikamp } 2414617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 2415ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 2416b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2417b31e1552SEric Sandeen "Couldn't mount RDWR because of " 2418b31e1552SEric Sandeen "unsupported optional features (%x)", 24193a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 24203a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2421ac27a0ecSDave Kleikamp goto failed_mount; 2422ac27a0ecSDave Kleikamp } 2423f287a1a5STheodore Ts'o has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2424f287a1a5STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2425f287a1a5STheodore Ts'o if (has_huge_files) { 24260fc1b451SAneesh Kumar K.V /* 24270fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 242890c699a9SBartlomiej Zolnierkiewicz * mount if kernel is build with CONFIG_LBDAF 24290fc1b451SAneesh Kumar K.V */ 24300fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 24310fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 2432b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge " 24330fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 243490c699a9SBartlomiej Zolnierkiewicz "without CONFIG_LBDAF"); 24350fc1b451SAneesh Kumar K.V goto failed_mount; 24360fc1b451SAneesh Kumar K.V } 24370fc1b451SAneesh Kumar K.V } 2438ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2439ac27a0ecSDave Kleikamp 2440617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2441617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2442b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2443b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 2444ac27a0ecSDave Kleikamp goto failed_mount; 2445ac27a0ecSDave Kleikamp } 2446ac27a0ecSDave Kleikamp 2447ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2448ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2449ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2450b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 2451ce40733cSAneesh Kumar K.V blocksize); 2452ac27a0ecSDave Kleikamp goto failed_mount; 2453ac27a0ecSDave Kleikamp } 2454ac27a0ecSDave Kleikamp 2455ac27a0ecSDave Kleikamp brelse(bh); 245670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 245770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 245870bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2459ac27a0ecSDave Kleikamp if (!bh) { 2460b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2461b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 2462ac27a0ecSDave Kleikamp goto failed_mount; 2463ac27a0ecSDave Kleikamp } 2464617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2465ac27a0ecSDave Kleikamp sbi->s_es = es; 2466617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2467b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2468b31e1552SEric Sandeen "Magic mismatch, very weird!"); 2469ac27a0ecSDave Kleikamp goto failed_mount; 2470ac27a0ecSDave Kleikamp } 2471ac27a0ecSDave Kleikamp } 2472ac27a0ecSDave Kleikamp 2473f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2474f287a1a5STheodore Ts'o has_huge_files); 2475f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2476ac27a0ecSDave Kleikamp 2477617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2478617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2479617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2480ac27a0ecSDave Kleikamp } else { 2481ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2482ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2483617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 24841330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2485ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2486b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2487b31e1552SEric Sandeen "unsupported inode size: %d", 2488ac27a0ecSDave Kleikamp sbi->s_inode_size); 2489ac27a0ecSDave Kleikamp goto failed_mount; 2490ac27a0ecSDave Kleikamp } 2491ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2492ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2493ac27a0ecSDave Kleikamp } 24940b8e58a1SAndreas Dilger 24950d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 24960d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 24978fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 24980d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2499d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 2500b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2501b31e1552SEric Sandeen "unsupported descriptor size %lu", 25020d1ee42fSAlexandre Ratchov sbi->s_desc_size); 25030d1ee42fSAlexandre Ratchov goto failed_mount; 25040d1ee42fSAlexandre Ratchov } 25050d1ee42fSAlexandre Ratchov } else 25060d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 25070b8e58a1SAndreas Dilger 2508ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2509ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2510b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2511617ba13bSMingming Cao goto cantfind_ext4; 25120b8e58a1SAndreas Dilger 2513617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2514ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2515617ba13bSMingming Cao goto cantfind_ext4; 2516ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2517ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 25180d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2519ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2520ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2521e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2522e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 25230b8e58a1SAndreas Dilger 2524ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2525ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2526ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2527f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2528f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2529f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2530f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2531f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2532f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2533f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2534f99b2589STheodore Ts'o #else 2535f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2536f99b2589STheodore Ts'o #endif 2537f99b2589STheodore Ts'o sb->s_dirt = 1; 2538f99b2589STheodore Ts'o } 2539ac27a0ecSDave Kleikamp 2540ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2541b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2542b31e1552SEric Sandeen "#blocks per group too big: %lu", 2543ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2544ac27a0ecSDave Kleikamp goto failed_mount; 2545ac27a0ecSDave Kleikamp } 2546ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2547b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2548b31e1552SEric Sandeen "#inodes per group too big: %lu", 2549ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2550ac27a0ecSDave Kleikamp goto failed_mount; 2551ac27a0ecSDave Kleikamp } 2552ac27a0ecSDave Kleikamp 2553bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2554ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2555b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 2556b31e1552SEric Sandeen " too large to mount safely"); 2557ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 255890c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 2559ac27a0ecSDave Kleikamp goto failed_mount; 2560ac27a0ecSDave Kleikamp } 2561ac27a0ecSDave Kleikamp 2562617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2563617ba13bSMingming Cao goto cantfind_ext4; 2564e7c95593SEric Sandeen 25650f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 25660f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 25670f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 2568b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 2569b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 25700f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 25710f2ddca6SFrom: Thiemo Nagel goto failed_mount; 25720f2ddca6SFrom: Thiemo Nagel } 25730f2ddca6SFrom: Thiemo Nagel 25744ec11028STheodore Ts'o /* 25754ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 25764ec11028STheodore Ts'o * of the filesystem. 25774ec11028STheodore Ts'o */ 25784ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 2579b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data" 2580b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 2581e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 25824ec11028STheodore Ts'o ext4_blocks_count(es)); 2583e7c95593SEric Sandeen goto failed_mount; 2584e7c95593SEric Sandeen } 2585bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2586bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2587bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2588bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 25894ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 2590b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 25914ec11028STheodore Ts'o "(block count %llu, first data block %u, " 2592b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 25934ec11028STheodore Ts'o ext4_blocks_count(es), 25944ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 25954ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 25964ec11028STheodore Ts'o goto failed_mount; 25974ec11028STheodore Ts'o } 2598bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2599617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2600617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2601ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2602ac27a0ecSDave Kleikamp GFP_KERNEL); 2603ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2604b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 2605ac27a0ecSDave Kleikamp goto failed_mount; 2606ac27a0ecSDave Kleikamp } 2607ac27a0ecSDave Kleikamp 26083244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 26099f6200bbSTheodore Ts'o if (ext4_proc_root) 26109f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 26113244fcb1SAlexander Beregalov #endif 2612240799cdSTheodore Ts'o 2613705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2614ac27a0ecSDave Kleikamp 2615ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 261670bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2617ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2618ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2619b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2620b31e1552SEric Sandeen "can't read group descriptor %d", i); 2621ac27a0ecSDave Kleikamp db_count = i; 2622ac27a0ecSDave Kleikamp goto failed_mount2; 2623ac27a0ecSDave Kleikamp } 2624ac27a0ecSDave Kleikamp } 2625617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2626b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 2627ac27a0ecSDave Kleikamp goto failed_mount2; 2628ac27a0ecSDave Kleikamp } 2629772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2630772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2631b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2632b31e1552SEric Sandeen "unable to initialize " 2633b31e1552SEric Sandeen "flex_bg meta info!"); 2634772cb7c8SJose R. Santos goto failed_mount2; 2635772cb7c8SJose R. Santos } 2636772cb7c8SJose R. Santos 2637ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2638ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2639ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2640ac27a0ecSDave Kleikamp 2641833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2642617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2643833f4077SPeter Zijlstra if (!err) { 2644833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2645617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2646833f4077SPeter Zijlstra } 2647833f4077SPeter Zijlstra if (!err) { 2648833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2649617ba13bSMingming Cao ext4_count_dirs(sb)); 2650833f4077SPeter Zijlstra } 26516bc6e63fSAneesh Kumar K.V if (!err) { 26526bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 26536bc6e63fSAneesh Kumar K.V } 2654833f4077SPeter Zijlstra if (err) { 2655b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "insufficient memory"); 2656833f4077SPeter Zijlstra goto failed_mount3; 2657833f4077SPeter Zijlstra } 2658ac27a0ecSDave Kleikamp 2659c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2660c9de560dSAlex Tomas 2661ac27a0ecSDave Kleikamp /* 2662ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2663ac27a0ecSDave Kleikamp */ 26649ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 26659ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 2666617ba13bSMingming Cao sb->s_op = &ext4_sops; 26679ca92389STheodore Ts'o else 26689ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 2669617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2670617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2671ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2672617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2673617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2674ac27a0ecSDave Kleikamp #endif 2675ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 26763b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 267732ed5058STheodore Ts'o mutex_init(&sbi->s_resize_lock); 2678ac27a0ecSDave Kleikamp 2679ac27a0ecSDave Kleikamp sb->s_root = NULL; 2680ac27a0ecSDave Kleikamp 2681ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2682617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2683617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2684ac27a0ecSDave Kleikamp 2685ac27a0ecSDave Kleikamp /* 2686ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2687ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2688ac27a0ecSDave Kleikamp */ 2689ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2690617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2691617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2692ac27a0ecSDave Kleikamp goto failed_mount3; 2693624080edSTheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && 2694624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit) { 2695b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "error: " 2696624080edSTheodore Ts'o "ext4_fill_super: Journal transaction " 2697b31e1552SEric Sandeen "%u is corrupt", 2698624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit); 2699624080edSTheodore Ts'o if (test_opt(sb, ERRORS_RO)) { 2700b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, 2701b31e1552SEric Sandeen "Mounting filesystem read-only"); 2702624080edSTheodore Ts'o sb->s_flags |= MS_RDONLY; 2703624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2704624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2705624080edSTheodore Ts'o } 2706624080edSTheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) { 2707624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2708624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2709e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 2710624080edSTheodore Ts'o goto failed_mount4; 2711624080edSTheodore Ts'o } 2712624080edSTheodore Ts'o } 27130390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 27140390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2715b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 2716b31e1552SEric Sandeen "suppressed and not mounted read-only"); 27170390131bSFrank Mayhar goto failed_mount4; 2718ac27a0ecSDave Kleikamp } else { 27190390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 27200390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 27210390131bSFrank Mayhar sbi->s_journal = NULL; 27220390131bSFrank Mayhar needs_recovery = 0; 27230390131bSFrank Mayhar goto no_journal; 2724ac27a0ecSDave Kleikamp } 2725ac27a0ecSDave Kleikamp 2726eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2727eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2728eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2729b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 2730eb40a09cSJose R. Santos goto failed_mount4; 2731eb40a09cSJose R. Santos } 2732eb40a09cSJose R. Santos 2733818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2734818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2735818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2736818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2737818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2738818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2739818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2740818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2741818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2742818d276cSGirish Shilamkar } else { 2743818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2744818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2745818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2746818d276cSGirish Shilamkar } 2747818d276cSGirish Shilamkar 2748ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2749ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2750ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2751ac27a0ecSDave Kleikamp case 0: 2752ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 275363f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 275463f57933SAndrew Morton * cope, else JOURNAL_DATA 275563f57933SAndrew Morton */ 2756dab291afSMingming Cao if (jbd2_journal_check_available_features 2757dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2758ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2759ac27a0ecSDave Kleikamp else 2760ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2761ac27a0ecSDave Kleikamp break; 2762ac27a0ecSDave Kleikamp 2763617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2764617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2765dab291afSMingming Cao if (!jbd2_journal_check_available_features 2766dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2767b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 2768b31e1552SEric Sandeen "requested data journaling mode"); 2769ac27a0ecSDave Kleikamp goto failed_mount4; 2770ac27a0ecSDave Kleikamp } 2771ac27a0ecSDave Kleikamp default: 2772ac27a0ecSDave Kleikamp break; 2773ac27a0ecSDave Kleikamp } 2774b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2775ac27a0ecSDave Kleikamp 27760390131bSFrank Mayhar no_journal: 2777ac27a0ecSDave Kleikamp 2778ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2779617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2780b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " 2781b31e1552SEric Sandeen "its supported only with writeback mode"); 2782ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2783ac27a0ecSDave Kleikamp } 2784ac27a0ecSDave Kleikamp } 2785ac27a0ecSDave Kleikamp /* 2786dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2787ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2788ac27a0ecSDave Kleikamp */ 2789ac27a0ecSDave Kleikamp 27901d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 27911d1fe1eeSDavid Howells if (IS_ERR(root)) { 2792b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 27931d1fe1eeSDavid Howells ret = PTR_ERR(root); 2794ac27a0ecSDave Kleikamp goto failed_mount4; 2795ac27a0ecSDave Kleikamp } 2796ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 27971d1fe1eeSDavid Howells iput(root); 2798b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 2799ac27a0ecSDave Kleikamp goto failed_mount4; 2800ac27a0ecSDave Kleikamp } 28011d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 28021d1fe1eeSDavid Howells if (!sb->s_root) { 2803b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 28041d1fe1eeSDavid Howells iput(root); 28051d1fe1eeSDavid Howells ret = -ENOMEM; 28061d1fe1eeSDavid Howells goto failed_mount4; 28071d1fe1eeSDavid Howells } 2808ac27a0ecSDave Kleikamp 2809617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2810ef7f3835SKalpak Shah 2811ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2812ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2813ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2814ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2815ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2816ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2817ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2818ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2819ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2820ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2821ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2822ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2823ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2824ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2825ef7f3835SKalpak Shah } 2826ef7f3835SKalpak Shah } 2827ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2828ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2829ef7f3835SKalpak Shah sbi->s_inode_size) { 2830ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2831ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2832b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 2833b31e1552SEric Sandeen "available"); 2834ef7f3835SKalpak Shah } 2835ef7f3835SKalpak Shah 2836c2774d84SAneesh Kumar K.V if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2837b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " 2838b31e1552SEric Sandeen "requested data journaling mode"); 2839c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 2840c2774d84SAneesh Kumar K.V } else if (test_opt(sb, DELALLOC)) 2841b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "delayed allocation enabled"); 2842c2774d84SAneesh Kumar K.V 28436fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 28446fd058f7STheodore Ts'o if (err) { 2845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 28466fd058f7STheodore Ts'o "zone (%d)\n", err); 28476fd058f7STheodore Ts'o goto failed_mount4; 28486fd058f7STheodore Ts'o } 28496fd058f7STheodore Ts'o 2850c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 2851c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 2852c2774d84SAneesh Kumar K.V if (err) { 2853b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", 2854c2774d84SAneesh Kumar K.V err); 2855c2774d84SAneesh Kumar K.V goto failed_mount4; 2856c2774d84SAneesh Kumar K.V } 2857c2774d84SAneesh Kumar K.V 28583197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 28593197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 28603197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 28613197ebdbSTheodore Ts'o "%s", sb->s_id); 28623197ebdbSTheodore Ts'o if (err) { 28633197ebdbSTheodore Ts'o ext4_mb_release(sb); 28643197ebdbSTheodore Ts'o ext4_ext_release(sb); 28653197ebdbSTheodore Ts'o goto failed_mount4; 28663197ebdbSTheodore Ts'o }; 28673197ebdbSTheodore Ts'o 2868617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2869617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2870617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 28710390131bSFrank Mayhar if (needs_recovery) { 2872b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 2873617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 28740390131bSFrank Mayhar } 28750390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 28760390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 28770390131bSFrank Mayhar descr = " journalled data mode"; 28780390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 28790390131bSFrank Mayhar descr = " ordered data mode"; 28800390131bSFrank Mayhar else 28810390131bSFrank Mayhar descr = " writeback data mode"; 28820390131bSFrank Mayhar } else 28830390131bSFrank Mayhar descr = "out journal"; 28840390131bSFrank Mayhar 2885b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); 2886ac27a0ecSDave Kleikamp 2887ac27a0ecSDave Kleikamp lock_kernel(); 2888ac27a0ecSDave Kleikamp return 0; 2889ac27a0ecSDave Kleikamp 2890617ba13bSMingming Cao cantfind_ext4: 2891ac27a0ecSDave Kleikamp if (!silent) 2892b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 2893ac27a0ecSDave Kleikamp goto failed_mount; 2894ac27a0ecSDave Kleikamp 2895ac27a0ecSDave Kleikamp failed_mount4: 2896b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 28976fd058f7STheodore Ts'o ext4_release_system_zone(sb); 28980390131bSFrank Mayhar if (sbi->s_journal) { 2899dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 290047b4a50bSJan Kara sbi->s_journal = NULL; 29010390131bSFrank Mayhar } 2902ac27a0ecSDave Kleikamp failed_mount3: 2903c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 2904c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 2905c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 2906c5ca7c76STheodore Ts'o else 2907c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 2908c5ca7c76STheodore Ts'o } 2909ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2910ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2911ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 29126bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 2913ac27a0ecSDave Kleikamp failed_mount2: 2914ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2915ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2916ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2917ac27a0ecSDave Kleikamp failed_mount: 2918240799cdSTheodore Ts'o if (sbi->s_proc) { 29199f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 2920240799cdSTheodore Ts'o } 2921ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2922ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2923ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2924ac27a0ecSDave Kleikamp #endif 2925617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2926ac27a0ecSDave Kleikamp brelse(bh); 2927ac27a0ecSDave Kleikamp out_fail: 2928ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2929f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 2930ac27a0ecSDave Kleikamp kfree(sbi); 2931ac27a0ecSDave Kleikamp lock_kernel(); 29321d1fe1eeSDavid Howells return ret; 2933ac27a0ecSDave Kleikamp } 2934ac27a0ecSDave Kleikamp 2935ac27a0ecSDave Kleikamp /* 2936ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2937ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2938ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2939ac27a0ecSDave Kleikamp */ 2940617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2941ac27a0ecSDave Kleikamp { 2942617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2943ac27a0ecSDave Kleikamp 2944ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 294530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 294630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 2947ac27a0ecSDave Kleikamp 2948ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2949ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2950dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2951ac27a0ecSDave Kleikamp else 2952dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 29535bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 29545bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 29555bf5683aSHidehiro Kawai else 29565bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 2957ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2958ac27a0ecSDave Kleikamp } 2959ac27a0ecSDave Kleikamp 2960617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2961ac27a0ecSDave Kleikamp unsigned int journal_inum) 2962ac27a0ecSDave Kleikamp { 2963ac27a0ecSDave Kleikamp struct inode *journal_inode; 2964ac27a0ecSDave Kleikamp journal_t *journal; 2965ac27a0ecSDave Kleikamp 29660390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 29670390131bSFrank Mayhar 2968ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2969ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2970ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2971ac27a0ecSDave Kleikamp 29721d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 29731d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 2974b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 2975ac27a0ecSDave Kleikamp return NULL; 2976ac27a0ecSDave Kleikamp } 2977ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2978ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2979ac27a0ecSDave Kleikamp iput(journal_inode); 2980b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 2981ac27a0ecSDave Kleikamp return NULL; 2982ac27a0ecSDave Kleikamp } 2983ac27a0ecSDave Kleikamp 2984e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 2985ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 29861d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 2987b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 2988ac27a0ecSDave Kleikamp iput(journal_inode); 2989ac27a0ecSDave Kleikamp return NULL; 2990ac27a0ecSDave Kleikamp } 2991ac27a0ecSDave Kleikamp 2992dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2993ac27a0ecSDave Kleikamp if (!journal) { 2994b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 2995ac27a0ecSDave Kleikamp iput(journal_inode); 2996ac27a0ecSDave Kleikamp return NULL; 2997ac27a0ecSDave Kleikamp } 2998ac27a0ecSDave Kleikamp journal->j_private = sb; 2999617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3000ac27a0ecSDave Kleikamp return journal; 3001ac27a0ecSDave Kleikamp } 3002ac27a0ecSDave Kleikamp 3003617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 3004ac27a0ecSDave Kleikamp dev_t j_dev) 3005ac27a0ecSDave Kleikamp { 3006ac27a0ecSDave Kleikamp struct buffer_head *bh; 3007ac27a0ecSDave Kleikamp journal_t *journal; 3008617ba13bSMingming Cao ext4_fsblk_t start; 3009617ba13bSMingming Cao ext4_fsblk_t len; 3010ac27a0ecSDave Kleikamp int hblock, blocksize; 3011617ba13bSMingming Cao ext4_fsblk_t sb_block; 3012ac27a0ecSDave Kleikamp unsigned long offset; 3013617ba13bSMingming Cao struct ext4_super_block *es; 3014ac27a0ecSDave Kleikamp struct block_device *bdev; 3015ac27a0ecSDave Kleikamp 30160390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 30170390131bSFrank Mayhar 3018b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 3019ac27a0ecSDave Kleikamp if (bdev == NULL) 3020ac27a0ecSDave Kleikamp return NULL; 3021ac27a0ecSDave Kleikamp 3022ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 3023b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3024b31e1552SEric Sandeen "failed to claim external journal device"); 30259a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 3026ac27a0ecSDave Kleikamp return NULL; 3027ac27a0ecSDave Kleikamp } 3028ac27a0ecSDave Kleikamp 3029ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 3030e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 3031ac27a0ecSDave Kleikamp if (blocksize < hblock) { 3032b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3033b31e1552SEric Sandeen "blocksize too small for journal device"); 3034ac27a0ecSDave Kleikamp goto out_bdev; 3035ac27a0ecSDave Kleikamp } 3036ac27a0ecSDave Kleikamp 3037617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 3038617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 3039ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 3040ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 3041b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 3042b31e1552SEric Sandeen "external journal"); 3043ac27a0ecSDave Kleikamp goto out_bdev; 3044ac27a0ecSDave Kleikamp } 3045ac27a0ecSDave Kleikamp 3046617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 3047617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 3048ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 3049617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3050b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 3051b31e1552SEric Sandeen "bad superblock"); 3052ac27a0ecSDave Kleikamp brelse(bh); 3053ac27a0ecSDave Kleikamp goto out_bdev; 3054ac27a0ecSDave Kleikamp } 3055ac27a0ecSDave Kleikamp 3056617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3057b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 3058ac27a0ecSDave Kleikamp brelse(bh); 3059ac27a0ecSDave Kleikamp goto out_bdev; 3060ac27a0ecSDave Kleikamp } 3061ac27a0ecSDave Kleikamp 3062bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3063ac27a0ecSDave Kleikamp start = sb_block + 1; 3064ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3065ac27a0ecSDave Kleikamp 3066dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3067ac27a0ecSDave Kleikamp start, len, blocksize); 3068ac27a0ecSDave Kleikamp if (!journal) { 3069b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 3070ac27a0ecSDave Kleikamp goto out_bdev; 3071ac27a0ecSDave Kleikamp } 3072ac27a0ecSDave Kleikamp journal->j_private = sb; 3073ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3074ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3075ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3076b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 3077ac27a0ecSDave Kleikamp goto out_journal; 3078ac27a0ecSDave Kleikamp } 3079ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3080b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 3081b31e1552SEric Sandeen "user (unsupported) - %d", 3082ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3083ac27a0ecSDave Kleikamp goto out_journal; 3084ac27a0ecSDave Kleikamp } 3085617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3086617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3087ac27a0ecSDave Kleikamp return journal; 30880b8e58a1SAndreas Dilger 3089ac27a0ecSDave Kleikamp out_journal: 3090dab291afSMingming Cao jbd2_journal_destroy(journal); 3091ac27a0ecSDave Kleikamp out_bdev: 3092617ba13bSMingming Cao ext4_blkdev_put(bdev); 3093ac27a0ecSDave Kleikamp return NULL; 3094ac27a0ecSDave Kleikamp } 3095ac27a0ecSDave Kleikamp 3096617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3097617ba13bSMingming Cao struct ext4_super_block *es, 3098ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3099ac27a0ecSDave Kleikamp { 3100ac27a0ecSDave Kleikamp journal_t *journal; 3101ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3102ac27a0ecSDave Kleikamp dev_t journal_dev; 3103ac27a0ecSDave Kleikamp int err = 0; 3104ac27a0ecSDave Kleikamp int really_read_only; 3105ac27a0ecSDave Kleikamp 31060390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 31070390131bSFrank Mayhar 3108ac27a0ecSDave Kleikamp if (journal_devnum && 3109ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3110b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 3111b31e1552SEric Sandeen "numbers have changed"); 3112ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3113ac27a0ecSDave Kleikamp } else 3114ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3115ac27a0ecSDave Kleikamp 3116ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3117ac27a0ecSDave Kleikamp 3118ac27a0ecSDave Kleikamp /* 3119ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3120ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3121ac27a0ecSDave Kleikamp * can get read-write access to the device. 3122ac27a0ecSDave Kleikamp */ 3123617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3124ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3125b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 3126b31e1552SEric Sandeen "required on readonly filesystem"); 3127ac27a0ecSDave Kleikamp if (really_read_only) { 3128b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 3129b31e1552SEric Sandeen "unavailable, cannot proceed"); 3130ac27a0ecSDave Kleikamp return -EROFS; 3131ac27a0ecSDave Kleikamp } 3132b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 3133b31e1552SEric Sandeen "be enabled during recovery"); 3134ac27a0ecSDave Kleikamp } 3135ac27a0ecSDave Kleikamp } 3136ac27a0ecSDave Kleikamp 3137ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3138b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 3139b31e1552SEric Sandeen "and inode journals!"); 3140ac27a0ecSDave Kleikamp return -EINVAL; 3141ac27a0ecSDave Kleikamp } 3142ac27a0ecSDave Kleikamp 3143ac27a0ecSDave Kleikamp if (journal_inum) { 3144617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3145ac27a0ecSDave Kleikamp return -EINVAL; 3146ac27a0ecSDave Kleikamp } else { 3147617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3148ac27a0ecSDave Kleikamp return -EINVAL; 3149ac27a0ecSDave Kleikamp } 3150ac27a0ecSDave Kleikamp 31514776004fSTheodore Ts'o if (journal->j_flags & JBD2_BARRIER) 3152b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers enabled"); 31534776004fSTheodore Ts'o else 3154b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 31554776004fSTheodore Ts'o 3156ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3157dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3158ac27a0ecSDave Kleikamp if (err) { 3159b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error updating journal"); 3160dab291afSMingming Cao jbd2_journal_destroy(journal); 3161ac27a0ecSDave Kleikamp return err; 3162ac27a0ecSDave Kleikamp } 3163ac27a0ecSDave Kleikamp } 3164ac27a0ecSDave Kleikamp 3165617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3166dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3167ac27a0ecSDave Kleikamp if (!err) 3168dab291afSMingming Cao err = jbd2_journal_load(journal); 3169ac27a0ecSDave Kleikamp 3170ac27a0ecSDave Kleikamp if (err) { 3171b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 3172dab291afSMingming Cao jbd2_journal_destroy(journal); 3173ac27a0ecSDave Kleikamp return err; 3174ac27a0ecSDave Kleikamp } 3175ac27a0ecSDave Kleikamp 3176617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3177617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3178ac27a0ecSDave Kleikamp 3179ac27a0ecSDave Kleikamp if (journal_devnum && 3180ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3181ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3182ac27a0ecSDave Kleikamp 3183ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3184e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3185ac27a0ecSDave Kleikamp } 3186ac27a0ecSDave Kleikamp 3187ac27a0ecSDave Kleikamp return 0; 3188ac27a0ecSDave Kleikamp } 3189ac27a0ecSDave Kleikamp 3190e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 3191ac27a0ecSDave Kleikamp { 3192e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3193617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3194c4be0c1dSTakashi Sato int error = 0; 3195ac27a0ecSDave Kleikamp 3196ac27a0ecSDave Kleikamp if (!sbh) 3197c4be0c1dSTakashi Sato return error; 3198914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3199914258bfSTheodore Ts'o /* 3200914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3201914258bfSTheodore Ts'o * superblock failed. This could happen because the 3202914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3203914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3204914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3205914258bfSTheodore Ts'o * write and hope for the best. 3206914258bfSTheodore Ts'o */ 3207b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 3208b31e1552SEric Sandeen "superblock detected"); 3209914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3210914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3211914258bfSTheodore Ts'o } 3212ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3213afc32f7eSTheodore Ts'o es->s_kbytes_written = 3214afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3215afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3216afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 32175d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 32185d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 32195d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 32205d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 32217234ab2aSTheodore Ts'o sb->s_dirt = 0; 3222ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3223ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3224914258bfSTheodore Ts'o if (sync) { 3225c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3226c4be0c1dSTakashi Sato if (error) 3227c4be0c1dSTakashi Sato return error; 3228c4be0c1dSTakashi Sato 3229c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3230c4be0c1dSTakashi Sato if (error) { 3231b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 3232b31e1552SEric Sandeen "superblock"); 3233914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3234914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3235914258bfSTheodore Ts'o } 3236914258bfSTheodore Ts'o } 3237c4be0c1dSTakashi Sato return error; 3238ac27a0ecSDave Kleikamp } 3239ac27a0ecSDave Kleikamp 3240ac27a0ecSDave Kleikamp /* 3241ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3242ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3243ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3244ac27a0ecSDave Kleikamp */ 3245617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3246617ba13bSMingming Cao struct ext4_super_block *es) 3247ac27a0ecSDave Kleikamp { 3248617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3249ac27a0ecSDave Kleikamp 32500390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 32510390131bSFrank Mayhar BUG_ON(journal != NULL); 32520390131bSFrank Mayhar return; 32530390131bSFrank Mayhar } 3254dab291afSMingming Cao jbd2_journal_lock_updates(journal); 32557ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 32567ffe1ea8SHidehiro Kawai goto out; 32577ffe1ea8SHidehiro Kawai 3258617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3259ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3260617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3261e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3262ac27a0ecSDave Kleikamp } 32637ffe1ea8SHidehiro Kawai 32647ffe1ea8SHidehiro Kawai out: 3265dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3266ac27a0ecSDave Kleikamp } 3267ac27a0ecSDave Kleikamp 3268ac27a0ecSDave Kleikamp /* 3269ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3270ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3271ac27a0ecSDave Kleikamp * main filesystem now. 3272ac27a0ecSDave Kleikamp */ 3273617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3274617ba13bSMingming Cao struct ext4_super_block *es) 3275ac27a0ecSDave Kleikamp { 3276ac27a0ecSDave Kleikamp journal_t *journal; 3277ac27a0ecSDave Kleikamp int j_errno; 3278ac27a0ecSDave Kleikamp const char *errstr; 3279ac27a0ecSDave Kleikamp 32800390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 32810390131bSFrank Mayhar 3282617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3283ac27a0ecSDave Kleikamp 3284ac27a0ecSDave Kleikamp /* 3285ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3286617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3287ac27a0ecSDave Kleikamp */ 3288ac27a0ecSDave Kleikamp 3289dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3290ac27a0ecSDave Kleikamp if (j_errno) { 3291ac27a0ecSDave Kleikamp char nbuf[16]; 3292ac27a0ecSDave Kleikamp 3293617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 329446e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 3295ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 329646e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 3297ac27a0ecSDave Kleikamp "filesystem check."); 3298ac27a0ecSDave Kleikamp 3299617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3300617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3301e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3302ac27a0ecSDave Kleikamp 3303dab291afSMingming Cao jbd2_journal_clear_err(journal); 3304ac27a0ecSDave Kleikamp } 3305ac27a0ecSDave Kleikamp } 3306ac27a0ecSDave Kleikamp 3307ac27a0ecSDave Kleikamp /* 3308ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3309ac27a0ecSDave Kleikamp * and wait on the commit. 3310ac27a0ecSDave Kleikamp */ 3311617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3312ac27a0ecSDave Kleikamp { 3313ac27a0ecSDave Kleikamp journal_t *journal; 33140390131bSFrank Mayhar int ret = 0; 3315ac27a0ecSDave Kleikamp 3316ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3317ac27a0ecSDave Kleikamp return 0; 3318ac27a0ecSDave Kleikamp 3319617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 33207234ab2aSTheodore Ts'o if (journal) 3321617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 33220390131bSFrank Mayhar 3323ac27a0ecSDave Kleikamp return ret; 3324ac27a0ecSDave Kleikamp } 3325ac27a0ecSDave Kleikamp 3326617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3327ac27a0ecSDave Kleikamp { 3328ebc1ac16SChristoph Hellwig lock_super(sb); 3329e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3330ebc1ac16SChristoph Hellwig unlock_super(sb); 33310390131bSFrank Mayhar } 3332ac27a0ecSDave Kleikamp 3333617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3334ac27a0ecSDave Kleikamp { 333514ce0cb4STheodore Ts'o int ret = 0; 33369eddacf9SJan Kara tid_t target; 3337ac27a0ecSDave Kleikamp 33389bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 33399ca92389STheodore Ts'o if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { 3340ac27a0ecSDave Kleikamp if (wait) 33419ca92389STheodore Ts'o jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); 33420390131bSFrank Mayhar } 334314ce0cb4STheodore Ts'o return ret; 3344ac27a0ecSDave Kleikamp } 3345ac27a0ecSDave Kleikamp 3346ac27a0ecSDave Kleikamp /* 3347ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3348ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3349ac27a0ecSDave Kleikamp */ 3350c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3351ac27a0ecSDave Kleikamp { 3352c4be0c1dSTakashi Sato int error = 0; 3353c4be0c1dSTakashi Sato journal_t *journal; 3354ac27a0ecSDave Kleikamp 33559ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 33569ca92389STheodore Ts'o return 0; 33579ca92389STheodore Ts'o 3358c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3359ac27a0ecSDave Kleikamp 3360ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3361dab291afSMingming Cao jbd2_journal_lock_updates(journal); 33627ffe1ea8SHidehiro Kawai 33637ffe1ea8SHidehiro Kawai /* 33649ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 33659ca92389STheodore Ts'o * the journal. 33667ffe1ea8SHidehiro Kawai */ 3367c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 33689ca92389STheodore Ts'o if (error < 0) { 33699ca92389STheodore Ts'o out: 33709ca92389STheodore Ts'o jbd2_journal_unlock_updates(journal); 33719ca92389STheodore Ts'o return error; 33720390131bSFrank Mayhar } 3373ac27a0ecSDave Kleikamp 3374ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3375617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3376e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 3377c4be0c1dSTakashi Sato if (error) 3378c4be0c1dSTakashi Sato goto out; 3379c4be0c1dSTakashi Sato return 0; 3380ac27a0ecSDave Kleikamp } 3381ac27a0ecSDave Kleikamp 3382ac27a0ecSDave Kleikamp /* 3383ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3384ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3385ac27a0ecSDave Kleikamp */ 3386c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3387ac27a0ecSDave Kleikamp { 33889ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 33899ca92389STheodore Ts'o return 0; 33909ca92389STheodore Ts'o 3391ac27a0ecSDave Kleikamp lock_super(sb); 33929ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 3393617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3394e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 3395ac27a0ecSDave Kleikamp unlock_super(sb); 3396dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3397c4be0c1dSTakashi Sato return 0; 3398ac27a0ecSDave Kleikamp } 3399ac27a0ecSDave Kleikamp 3400617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3401ac27a0ecSDave Kleikamp { 3402617ba13bSMingming Cao struct ext4_super_block *es; 3403617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3404617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3405ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3406617ba13bSMingming Cao struct ext4_mount_options old_opts; 34078a266467STheodore Ts'o ext4_group_t g; 3408b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3409ac27a0ecSDave Kleikamp int err; 3410ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3411ac27a0ecSDave Kleikamp int i; 3412ac27a0ecSDave Kleikamp #endif 3413ac27a0ecSDave Kleikamp 3414337eb00aSAlessio Igor Bogani lock_kernel(); 3415337eb00aSAlessio Igor Bogani 3416ac27a0ecSDave Kleikamp /* Store the original options */ 3417bbd6851aSAl Viro lock_super(sb); 3418ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3419ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3420ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3421ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3422ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 342330773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 342430773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3425ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3426ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3427ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3428ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3429ac27a0ecSDave Kleikamp #endif 3430b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3431b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3432ac27a0ecSDave Kleikamp 3433ac27a0ecSDave Kleikamp /* 3434ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3435ac27a0ecSDave Kleikamp */ 3436b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3437b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3438ac27a0ecSDave Kleikamp err = -EINVAL; 3439ac27a0ecSDave Kleikamp goto restore_opts; 3440ac27a0ecSDave Kleikamp } 3441ac27a0ecSDave Kleikamp 34424ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 344346e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3444ac27a0ecSDave Kleikamp 3445ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3446617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 3447ac27a0ecSDave Kleikamp 3448ac27a0ecSDave Kleikamp es = sbi->s_es; 3449ac27a0ecSDave Kleikamp 3450b3881f74STheodore Ts'o if (sbi->s_journal) { 3451617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3452b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3453b3881f74STheodore Ts'o } 3454ac27a0ecSDave Kleikamp 3455ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3456bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 34574ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 3458ac27a0ecSDave Kleikamp err = -EROFS; 3459ac27a0ecSDave Kleikamp goto restore_opts; 3460ac27a0ecSDave Kleikamp } 3461ac27a0ecSDave Kleikamp 3462ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3463ac27a0ecSDave Kleikamp /* 3464ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3465ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3466ac27a0ecSDave Kleikamp */ 3467ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3468ac27a0ecSDave Kleikamp 3469ac27a0ecSDave Kleikamp /* 3470ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3471ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3472ac27a0ecSDave Kleikamp * mark the partition as valid again. 3473ac27a0ecSDave Kleikamp */ 3474617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3475617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3476ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3477ac27a0ecSDave Kleikamp 3478a63c9eb2STheodore Ts'o if (sbi->s_journal) 3479617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 3480ac27a0ecSDave Kleikamp } else { 34813a06d778SAneesh Kumar K.V int ret; 3482617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3483617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 3484b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "couldn't " 3485ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 3486b31e1552SEric Sandeen "optional features (%x)", 34873a06d778SAneesh Kumar K.V (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & 34883a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3489ac27a0ecSDave Kleikamp err = -EROFS; 3490ac27a0ecSDave Kleikamp goto restore_opts; 3491ac27a0ecSDave Kleikamp } 3492ead6596bSEric Sandeen 3493ead6596bSEric Sandeen /* 34948a266467STheodore Ts'o * Make sure the group descriptor checksums 34950b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 34968a266467STheodore Ts'o */ 34978a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 34988a266467STheodore Ts'o struct ext4_group_desc *gdp = 34998a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 35008a266467STheodore Ts'o 35018a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 3502b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3503b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 35048a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 35058a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 35068a266467STheodore Ts'o err = -EINVAL; 35078a266467STheodore Ts'o goto restore_opts; 35088a266467STheodore Ts'o } 35098a266467STheodore Ts'o } 35108a266467STheodore Ts'o 35118a266467STheodore Ts'o /* 3512ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3513ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3514ead6596bSEric Sandeen * require a full umount/remount for now. 3515ead6596bSEric Sandeen */ 3516ead6596bSEric Sandeen if (es->s_last_orphan) { 3517b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 3518ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3519ead6596bSEric Sandeen "orphan inode list. Please " 3520b31e1552SEric Sandeen "umount/remount instead"); 3521ead6596bSEric Sandeen err = -EINVAL; 3522ead6596bSEric Sandeen goto restore_opts; 3523ead6596bSEric Sandeen } 3524ead6596bSEric Sandeen 3525ac27a0ecSDave Kleikamp /* 3526ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3527ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3528ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3529ac27a0ecSDave Kleikamp * the partition.) 3530ac27a0ecSDave Kleikamp */ 35310390131bSFrank Mayhar if (sbi->s_journal) 3532617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3533ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3534617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3535ac27a0ecSDave Kleikamp goto restore_opts; 3536617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3537ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3538ac27a0ecSDave Kleikamp } 3539ac27a0ecSDave Kleikamp } 35406fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 35410390131bSFrank Mayhar if (sbi->s_journal == NULL) 3542e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 35430390131bSFrank Mayhar 3544ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3545ac27a0ecSDave Kleikamp /* Release old quota file names */ 3546ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3547ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3548ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3549ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3550ac27a0ecSDave Kleikamp #endif 3551bbd6851aSAl Viro unlock_super(sb); 3552337eb00aSAlessio Igor Bogani unlock_kernel(); 3553ac27a0ecSDave Kleikamp return 0; 35540b8e58a1SAndreas Dilger 3555ac27a0ecSDave Kleikamp restore_opts: 3556ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3557ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3558ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3559ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3560ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 356130773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 356230773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3563ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3564ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3565ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3566ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3567ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3568ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3569ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3570ac27a0ecSDave Kleikamp } 3571ac27a0ecSDave Kleikamp #endif 3572bbd6851aSAl Viro unlock_super(sb); 3573337eb00aSAlessio Igor Bogani unlock_kernel(); 3574ac27a0ecSDave Kleikamp return err; 3575ac27a0ecSDave Kleikamp } 3576ac27a0ecSDave Kleikamp 3577617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3578ac27a0ecSDave Kleikamp { 3579ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3580617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3581617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3582960cc398SPekka Enberg u64 fsid; 3583ac27a0ecSDave Kleikamp 35845e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 35855e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 35866bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 35878df9675fSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 35885e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3589ac27a0ecSDave Kleikamp 3590ac27a0ecSDave Kleikamp /* 35915e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 35925e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 35935e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3594ac27a0ecSDave Kleikamp */ 3595ac27a0ecSDave Kleikamp 3596ac27a0ecSDave Kleikamp /* 3597ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3598ac27a0ecSDave Kleikamp * overhead 3599ac27a0ecSDave Kleikamp */ 3600ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3601ac27a0ecSDave Kleikamp 3602ac27a0ecSDave Kleikamp /* 3603ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3604ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3605ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3606ac27a0ecSDave Kleikamp */ 3607ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3608617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3609617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3610ac27a0ecSDave Kleikamp cond_resched(); 3611ac27a0ecSDave Kleikamp } 3612ac27a0ecSDave Kleikamp 3613ac27a0ecSDave Kleikamp /* 3614ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3615ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3616ac27a0ecSDave Kleikamp */ 36175e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 36185e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 36195e70030dSBadari Pulavarty smp_wmb(); 36206bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3621ac27a0ecSDave Kleikamp } 3622ac27a0ecSDave Kleikamp 3623617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3624ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 36255e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 36266bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 36276bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3628308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 3629bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3630bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3631ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3632ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 363352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 36345e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3635617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3636960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3637960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3638960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3639960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 36400b8e58a1SAndreas Dilger 3641ac27a0ecSDave Kleikamp return 0; 3642ac27a0ecSDave Kleikamp } 3643ac27a0ecSDave Kleikamp 36440b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 36450b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 3646ac27a0ecSDave Kleikamp * Process 1 Process 2 3647617ba13bSMingming Cao * ext4_create() quota_sync() 3648dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3649a269eb18SJan Kara * vfs_dq_init() down(dqio_mutex) 3650dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3651ac27a0ecSDave Kleikamp * 3652ac27a0ecSDave Kleikamp */ 3653ac27a0ecSDave Kleikamp 3654ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3655ac27a0ecSDave Kleikamp 3656ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3657ac27a0ecSDave Kleikamp { 3658ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3659ac27a0ecSDave Kleikamp } 3660ac27a0ecSDave Kleikamp 3661617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3662ac27a0ecSDave Kleikamp { 3663ac27a0ecSDave Kleikamp int ret, err; 3664ac27a0ecSDave Kleikamp handle_t *handle; 3665ac27a0ecSDave Kleikamp struct inode *inode; 3666ac27a0ecSDave Kleikamp 3667ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3668617ba13bSMingming Cao handle = ext4_journal_start(inode, 3669617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3670ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3671ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3672ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3673617ba13bSMingming Cao err = ext4_journal_stop(handle); 3674ac27a0ecSDave Kleikamp if (!ret) 3675ac27a0ecSDave Kleikamp ret = err; 3676ac27a0ecSDave Kleikamp return ret; 3677ac27a0ecSDave Kleikamp } 3678ac27a0ecSDave Kleikamp 3679617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3680ac27a0ecSDave Kleikamp { 3681ac27a0ecSDave Kleikamp int ret, err; 3682ac27a0ecSDave Kleikamp handle_t *handle; 3683ac27a0ecSDave Kleikamp 3684617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3685617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3686ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3687ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3688ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3689617ba13bSMingming Cao err = ext4_journal_stop(handle); 3690ac27a0ecSDave Kleikamp if (!ret) 3691ac27a0ecSDave Kleikamp ret = err; 3692ac27a0ecSDave Kleikamp return ret; 3693ac27a0ecSDave Kleikamp } 3694ac27a0ecSDave Kleikamp 3695617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3696ac27a0ecSDave Kleikamp { 3697ac27a0ecSDave Kleikamp int ret, err; 3698ac27a0ecSDave Kleikamp handle_t *handle; 3699ac27a0ecSDave Kleikamp 3700617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3701617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 37029c3013e9SJan Kara if (IS_ERR(handle)) { 37039c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 37049c3013e9SJan Kara dquot_release(dquot); 3705ac27a0ecSDave Kleikamp return PTR_ERR(handle); 37069c3013e9SJan Kara } 3707ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3708617ba13bSMingming Cao err = ext4_journal_stop(handle); 3709ac27a0ecSDave Kleikamp if (!ret) 3710ac27a0ecSDave Kleikamp ret = err; 3711ac27a0ecSDave Kleikamp return ret; 3712ac27a0ecSDave Kleikamp } 3713ac27a0ecSDave Kleikamp 3714617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3715ac27a0ecSDave Kleikamp { 37162c8be6b2SJan Kara /* Are we journaling quotas? */ 3717617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3718617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3719ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3720617ba13bSMingming Cao return ext4_write_dquot(dquot); 3721ac27a0ecSDave Kleikamp } else { 3722ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3723ac27a0ecSDave Kleikamp } 3724ac27a0ecSDave Kleikamp } 3725ac27a0ecSDave Kleikamp 3726617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3727ac27a0ecSDave Kleikamp { 3728ac27a0ecSDave Kleikamp int ret, err; 3729ac27a0ecSDave Kleikamp handle_t *handle; 3730ac27a0ecSDave Kleikamp 3731ac27a0ecSDave Kleikamp /* Data block + inode block */ 3732617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3733ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3734ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3735ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3736617ba13bSMingming Cao err = ext4_journal_stop(handle); 3737ac27a0ecSDave Kleikamp if (!ret) 3738ac27a0ecSDave Kleikamp ret = err; 3739ac27a0ecSDave Kleikamp return ret; 3740ac27a0ecSDave Kleikamp } 3741ac27a0ecSDave Kleikamp 3742ac27a0ecSDave Kleikamp /* 3743ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3744ac27a0ecSDave Kleikamp * the quota file and such... 3745ac27a0ecSDave Kleikamp */ 3746617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3747ac27a0ecSDave Kleikamp { 3748617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3749617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3750ac27a0ecSDave Kleikamp } 3751ac27a0ecSDave Kleikamp 3752ac27a0ecSDave Kleikamp /* 3753ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3754ac27a0ecSDave Kleikamp */ 3755617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 37568264613dSAl Viro char *name, int remount) 3757ac27a0ecSDave Kleikamp { 3758ac27a0ecSDave Kleikamp int err; 37598264613dSAl Viro struct path path; 3760ac27a0ecSDave Kleikamp 3761ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3762ac27a0ecSDave Kleikamp return -EINVAL; 37638264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 37640623543bSJan Kara if (remount) 37658264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 37660623543bSJan Kara 37678264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3768ac27a0ecSDave Kleikamp if (err) 3769ac27a0ecSDave Kleikamp return err; 37700623543bSJan Kara 3771ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 37728264613dSAl Viro if (path.mnt->mnt_sb != sb) { 37738264613dSAl Viro path_put(&path); 3774ac27a0ecSDave Kleikamp return -EXDEV; 3775ac27a0ecSDave Kleikamp } 37760623543bSJan Kara /* Journaling quota? */ 37770623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 37782b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 37798264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3780b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3781b31e1552SEric Sandeen "Quota file not on filesystem root. " 3782b31e1552SEric Sandeen "Journaled quota will not work"); 37830623543bSJan Kara } 37840623543bSJan Kara 37850623543bSJan Kara /* 37860623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 37870623543bSJan Kara * all updates to the file when we bypass pagecache... 37880623543bSJan Kara */ 37890390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 37900390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 37910623543bSJan Kara /* 37920623543bSJan Kara * We don't need to lock updates but journal_flush() could 37930623543bSJan Kara * otherwise be livelocked... 37940623543bSJan Kara */ 37950623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 37967ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 37970623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 37987ffe1ea8SHidehiro Kawai if (err) { 37998264613dSAl Viro path_put(&path); 38007ffe1ea8SHidehiro Kawai return err; 38017ffe1ea8SHidehiro Kawai } 38020623543bSJan Kara } 38030623543bSJan Kara 38048264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 38058264613dSAl Viro path_put(&path); 380677e69dacSAl Viro return err; 3807ac27a0ecSDave Kleikamp } 3808ac27a0ecSDave Kleikamp 3809ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3810ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3811ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3812ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3813617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3814ac27a0ecSDave Kleikamp size_t len, loff_t off) 3815ac27a0ecSDave Kleikamp { 3816ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3817725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3818ac27a0ecSDave Kleikamp int err = 0; 3819ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3820ac27a0ecSDave Kleikamp int tocopy; 3821ac27a0ecSDave Kleikamp size_t toread; 3822ac27a0ecSDave Kleikamp struct buffer_head *bh; 3823ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3824ac27a0ecSDave Kleikamp 3825ac27a0ecSDave Kleikamp if (off > i_size) 3826ac27a0ecSDave Kleikamp return 0; 3827ac27a0ecSDave Kleikamp if (off+len > i_size) 3828ac27a0ecSDave Kleikamp len = i_size-off; 3829ac27a0ecSDave Kleikamp toread = len; 3830ac27a0ecSDave Kleikamp while (toread > 0) { 3831ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3832ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3833617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3834ac27a0ecSDave Kleikamp if (err) 3835ac27a0ecSDave Kleikamp return err; 3836ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3837ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3838ac27a0ecSDave Kleikamp else 3839ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3840ac27a0ecSDave Kleikamp brelse(bh); 3841ac27a0ecSDave Kleikamp offset = 0; 3842ac27a0ecSDave Kleikamp toread -= tocopy; 3843ac27a0ecSDave Kleikamp data += tocopy; 3844ac27a0ecSDave Kleikamp blk++; 3845ac27a0ecSDave Kleikamp } 3846ac27a0ecSDave Kleikamp return len; 3847ac27a0ecSDave Kleikamp } 3848ac27a0ecSDave Kleikamp 3849ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3850ac27a0ecSDave Kleikamp * enough credits) */ 3851617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3852ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3853ac27a0ecSDave Kleikamp { 3854ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3855725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3856ac27a0ecSDave Kleikamp int err = 0; 3857ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3858ac27a0ecSDave Kleikamp int tocopy; 3859617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3860ac27a0ecSDave Kleikamp size_t towrite = len; 3861ac27a0ecSDave Kleikamp struct buffer_head *bh; 3862ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3863ac27a0ecSDave Kleikamp 38640390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 3865b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 3866b31e1552SEric Sandeen " cancelled because transaction is not started", 38679c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 38689c3013e9SJan Kara return -EIO; 38699c3013e9SJan Kara } 3870ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3871ac27a0ecSDave Kleikamp while (towrite > 0) { 3872ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3873ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3874617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3875ac27a0ecSDave Kleikamp if (!bh) 3876ac27a0ecSDave Kleikamp goto out; 3877ac27a0ecSDave Kleikamp if (journal_quota) { 3878617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3879ac27a0ecSDave Kleikamp if (err) { 3880ac27a0ecSDave Kleikamp brelse(bh); 3881ac27a0ecSDave Kleikamp goto out; 3882ac27a0ecSDave Kleikamp } 3883ac27a0ecSDave Kleikamp } 3884ac27a0ecSDave Kleikamp lock_buffer(bh); 3885ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3886ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3887ac27a0ecSDave Kleikamp unlock_buffer(bh); 3888ac27a0ecSDave Kleikamp if (journal_quota) 38890390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 3890ac27a0ecSDave Kleikamp else { 3891ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3892678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3893ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3894ac27a0ecSDave Kleikamp } 3895ac27a0ecSDave Kleikamp brelse(bh); 3896ac27a0ecSDave Kleikamp if (err) 3897ac27a0ecSDave Kleikamp goto out; 3898ac27a0ecSDave Kleikamp offset = 0; 3899ac27a0ecSDave Kleikamp towrite -= tocopy; 3900ac27a0ecSDave Kleikamp data += tocopy; 3901ac27a0ecSDave Kleikamp blk++; 3902ac27a0ecSDave Kleikamp } 3903ac27a0ecSDave Kleikamp out: 39044d04e4fbSJan Kara if (len == towrite) { 39054d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3906ac27a0ecSDave Kleikamp return err; 39074d04e4fbSJan Kara } 3908ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3909ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3910617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3911ac27a0ecSDave Kleikamp } 3912ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3913617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3914ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3915ac27a0ecSDave Kleikamp return len - towrite; 3916ac27a0ecSDave Kleikamp } 3917ac27a0ecSDave Kleikamp 3918ac27a0ecSDave Kleikamp #endif 3919ac27a0ecSDave Kleikamp 39200b8e58a1SAndreas Dilger static int ext4_get_sb(struct file_system_type *fs_type, int flags, 39210b8e58a1SAndreas Dilger const char *dev_name, void *data, struct vfsmount *mnt) 3922ac27a0ecSDave Kleikamp { 3923617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 3924ac27a0ecSDave Kleikamp } 3925ac27a0ecSDave Kleikamp 392603010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 3927ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 392803010a33STheodore Ts'o .name = "ext4", 3929617ba13bSMingming Cao .get_sb = ext4_get_sb, 3930ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3931ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3932ac27a0ecSDave Kleikamp }; 3933ac27a0ecSDave Kleikamp 393403010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 39350b8e58a1SAndreas Dilger static int ext4dev_get_sb(struct file_system_type *fs_type, int flags, 39360b8e58a1SAndreas Dilger const char *dev_name, void *data,struct vfsmount *mnt) 393703010a33STheodore Ts'o { 3938b31e1552SEric Sandeen printk(KERN_WARNING "EXT4-fs (%s): Update your userspace programs " 3939b31e1552SEric Sandeen "to mount using ext4\n", dev_name); 3940b31e1552SEric Sandeen printk(KERN_WARNING "EXT4-fs (%s): ext4dev backwards compatibility " 3941b31e1552SEric Sandeen "will go away by 2.6.31\n", dev_name); 394203010a33STheodore Ts'o return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); 394303010a33STheodore Ts'o } 394403010a33STheodore Ts'o 394503010a33STheodore Ts'o static struct file_system_type ext4dev_fs_type = { 394603010a33STheodore Ts'o .owner = THIS_MODULE, 394703010a33STheodore Ts'o .name = "ext4dev", 394803010a33STheodore Ts'o .get_sb = ext4dev_get_sb, 394903010a33STheodore Ts'o .kill_sb = kill_block_super, 395003010a33STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 395103010a33STheodore Ts'o }; 395203010a33STheodore Ts'o MODULE_ALIAS("ext4dev"); 395303010a33STheodore Ts'o #endif 395403010a33STheodore Ts'o 3955617ba13bSMingming Cao static int __init init_ext4_fs(void) 3956ac27a0ecSDave Kleikamp { 3957c9de560dSAlex Tomas int err; 3958c9de560dSAlex Tomas 39596fd058f7STheodore Ts'o err = init_ext4_system_zone(); 39606fd058f7STheodore Ts'o if (err) 39616fd058f7STheodore Ts'o return err; 39623197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 39633197ebdbSTheodore Ts'o if (!ext4_kset) 39646fd058f7STheodore Ts'o goto out4; 39659f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 3966c9de560dSAlex Tomas err = init_ext4_mballoc(); 3967ac27a0ecSDave Kleikamp if (err) 39686fd058f7STheodore Ts'o goto out3; 3969c9de560dSAlex Tomas 3970c9de560dSAlex Tomas err = init_ext4_xattr(); 3971c9de560dSAlex Tomas if (err) 3972c9de560dSAlex Tomas goto out2; 3973ac27a0ecSDave Kleikamp err = init_inodecache(); 3974ac27a0ecSDave Kleikamp if (err) 3975ac27a0ecSDave Kleikamp goto out1; 397603010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 3977ac27a0ecSDave Kleikamp if (err) 3978ac27a0ecSDave Kleikamp goto out; 397903010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 398003010a33STheodore Ts'o err = register_filesystem(&ext4dev_fs_type); 398103010a33STheodore Ts'o if (err) { 398203010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 398303010a33STheodore Ts'o goto out; 398403010a33STheodore Ts'o } 398503010a33STheodore Ts'o #endif 3986ac27a0ecSDave Kleikamp return 0; 3987ac27a0ecSDave Kleikamp out: 3988ac27a0ecSDave Kleikamp destroy_inodecache(); 3989ac27a0ecSDave Kleikamp out1: 3990617ba13bSMingming Cao exit_ext4_xattr(); 3991c9de560dSAlex Tomas out2: 3992c9de560dSAlex Tomas exit_ext4_mballoc(); 39936fd058f7STheodore Ts'o out3: 39946fd058f7STheodore Ts'o remove_proc_entry("fs/ext4", NULL); 39956fd058f7STheodore Ts'o kset_unregister(ext4_kset); 39966fd058f7STheodore Ts'o out4: 39976fd058f7STheodore Ts'o exit_ext4_system_zone(); 3998ac27a0ecSDave Kleikamp return err; 3999ac27a0ecSDave Kleikamp } 4000ac27a0ecSDave Kleikamp 4001617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 4002ac27a0ecSDave Kleikamp { 400303010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 400403010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 4005617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 400603010a33STheodore Ts'o #endif 4007ac27a0ecSDave Kleikamp destroy_inodecache(); 4008617ba13bSMingming Cao exit_ext4_xattr(); 4009c9de560dSAlex Tomas exit_ext4_mballoc(); 40109f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 40113197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 40126fd058f7STheodore Ts'o exit_ext4_system_zone(); 4013ac27a0ecSDave Kleikamp } 4014ac27a0ecSDave Kleikamp 4015ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 401683982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 4017ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 4018617ba13bSMingming Cao module_init(init_ext4_fs) 4019617ba13bSMingming Cao module_exit(exit_ext4_fs) 4020