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> 23dab291afSMingming Cao #include <linux/jbd2.h> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 27ac27a0ecSDave Kleikamp #include <linux/parser.h> 28ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 38ede86cc4STheodore Ts'o #include <linux/marker.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 433dcf5451SChristoph Hellwig #include "ext4.h" 443dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 45ac27a0ecSDave Kleikamp #include "xattr.h" 46ac27a0ecSDave Kleikamp #include "acl.h" 47ac27a0ecSDave Kleikamp #include "namei.h" 48717d50e4SAndreas Dilger #include "group.h" 49ac27a0ecSDave Kleikamp 509f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 519f6200bbSTheodore Ts'o 52617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 53ac27a0ecSDave Kleikamp unsigned long journal_devnum); 54c4be0c1dSTakashi Sato static int ext4_commit_super(struct super_block *sb, 552b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync); 56617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 57617ba13bSMingming Cao struct ext4_super_block *es); 58617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 59617ba13bSMingming Cao struct ext4_super_block *es); 60617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 61617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 62ac27a0ecSDave Kleikamp char nbuf[16]); 63617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 64617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 65c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 66617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 67c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 68ac27a0ecSDave Kleikamp 69bd81d8eeSLaurent Vivier 708fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 718fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 72bd81d8eeSLaurent Vivier { 733a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 748fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 758fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 76bd81d8eeSLaurent Vivier } 77bd81d8eeSLaurent Vivier 788fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 798fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 80bd81d8eeSLaurent Vivier { 815272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 828fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 838fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 84bd81d8eeSLaurent Vivier } 85bd81d8eeSLaurent Vivier 868fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 878fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 88bd81d8eeSLaurent Vivier { 895272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 908fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 918fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 92bd81d8eeSLaurent Vivier } 93bd81d8eeSLaurent Vivier 94560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 95560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 96560671a0SAneesh Kumar K.V { 97560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 98560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 99560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 100560671a0SAneesh Kumar K.V } 101560671a0SAneesh Kumar K.V 102560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 103560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 104560671a0SAneesh Kumar K.V { 105560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 106560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 107560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 108560671a0SAneesh Kumar K.V } 109560671a0SAneesh Kumar K.V 110560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 111560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 112560671a0SAneesh Kumar K.V { 113560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 114560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 115560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 116560671a0SAneesh Kumar K.V } 117560671a0SAneesh Kumar K.V 118560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 119560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 120560671a0SAneesh Kumar K.V { 121560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 122560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 123560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 124560671a0SAneesh Kumar K.V } 125560671a0SAneesh Kumar K.V 1268fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1278fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 128bd81d8eeSLaurent Vivier { 1293a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1308fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1318fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 132bd81d8eeSLaurent Vivier } 133bd81d8eeSLaurent Vivier 1348fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1358fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 136bd81d8eeSLaurent Vivier { 1375272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1388fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1398fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 140bd81d8eeSLaurent Vivier } 141bd81d8eeSLaurent Vivier 1428fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1438fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 144bd81d8eeSLaurent Vivier { 1455272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1468fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1478fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 148bd81d8eeSLaurent Vivier } 149bd81d8eeSLaurent Vivier 150560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 151560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 152560671a0SAneesh Kumar K.V { 153560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 154560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 155560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 156560671a0SAneesh Kumar K.V } 157560671a0SAneesh Kumar K.V 158560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 159560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 160560671a0SAneesh Kumar K.V { 161560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 162560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 163560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 164560671a0SAneesh Kumar K.V } 165560671a0SAneesh Kumar K.V 166560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 167560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 168560671a0SAneesh Kumar K.V { 169560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 170560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 171560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 172560671a0SAneesh Kumar K.V } 173560671a0SAneesh Kumar K.V 174560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 175560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 176560671a0SAneesh Kumar K.V { 177560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 178560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 179560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 180560671a0SAneesh Kumar K.V } 181560671a0SAneesh Kumar K.V 182ac27a0ecSDave Kleikamp /* 183dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 184ac27a0ecSDave Kleikamp * 185ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 186ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 187ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 188ac27a0ecSDave Kleikamp * appropriate. 189ac27a0ecSDave Kleikamp */ 190617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 191ac27a0ecSDave Kleikamp { 192ac27a0ecSDave Kleikamp journal_t *journal; 193ac27a0ecSDave Kleikamp 194ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 195ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 196ac27a0ecSDave Kleikamp 197ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 198ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 199ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 200617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2010390131bSFrank Mayhar if (journal) { 202ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 20346e665e9SHarvey Harrison ext4_abort(sb, __func__, 204ac27a0ecSDave Kleikamp "Detected aborted journal"); 205ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 206ac27a0ecSDave Kleikamp } 207dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 208ac27a0ecSDave Kleikamp } 2090390131bSFrank Mayhar /* 2100390131bSFrank Mayhar * We're not journaling, return the appropriate indication. 2110390131bSFrank Mayhar */ 2120390131bSFrank Mayhar current->journal_info = EXT4_NOJOURNAL_HANDLE; 2130390131bSFrank Mayhar return current->journal_info; 2140390131bSFrank Mayhar } 215ac27a0ecSDave Kleikamp 216ac27a0ecSDave Kleikamp /* 217ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 218dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 219ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 220ac27a0ecSDave Kleikamp * appropriate. 221ac27a0ecSDave Kleikamp */ 222617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 223ac27a0ecSDave Kleikamp { 224ac27a0ecSDave Kleikamp struct super_block *sb; 225ac27a0ecSDave Kleikamp int err; 226ac27a0ecSDave Kleikamp int rc; 227ac27a0ecSDave Kleikamp 2280390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 2290390131bSFrank Mayhar /* 2300390131bSFrank Mayhar * Do this here since we don't call jbd2_journal_stop() in 2310390131bSFrank Mayhar * no-journal mode. 2320390131bSFrank Mayhar */ 2330390131bSFrank Mayhar current->journal_info = NULL; 2340390131bSFrank Mayhar return 0; 2350390131bSFrank Mayhar } 236ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 237ac27a0ecSDave Kleikamp err = handle->h_err; 238dab291afSMingming Cao rc = jbd2_journal_stop(handle); 239ac27a0ecSDave Kleikamp 240ac27a0ecSDave Kleikamp if (!err) 241ac27a0ecSDave Kleikamp err = rc; 242ac27a0ecSDave Kleikamp if (err) 243617ba13bSMingming Cao __ext4_std_error(sb, where, err); 244ac27a0ecSDave Kleikamp return err; 245ac27a0ecSDave Kleikamp } 246ac27a0ecSDave Kleikamp 247617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 248ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 249ac27a0ecSDave Kleikamp { 250ac27a0ecSDave Kleikamp char nbuf[16]; 251617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 252ac27a0ecSDave Kleikamp 2530390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2540390131bSFrank Mayhar 255ac27a0ecSDave Kleikamp if (bh) 256ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 257ac27a0ecSDave Kleikamp 258ac27a0ecSDave Kleikamp if (!handle->h_err) 259ac27a0ecSDave Kleikamp handle->h_err = err; 260ac27a0ecSDave Kleikamp 261ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 262ac27a0ecSDave Kleikamp return; 263ac27a0ecSDave Kleikamp 264ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 265ac27a0ecSDave Kleikamp caller, errstr, err_fn); 266ac27a0ecSDave Kleikamp 267dab291afSMingming Cao jbd2_journal_abort_handle(handle); 268ac27a0ecSDave Kleikamp } 269ac27a0ecSDave Kleikamp 270ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 271ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 272ac27a0ecSDave Kleikamp * 273ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 274617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 275ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 276ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 277ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 278ac27a0ecSDave Kleikamp * write out the superblock safely. 279ac27a0ecSDave Kleikamp * 280dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 281ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 282ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 283ac27a0ecSDave Kleikamp */ 284ac27a0ecSDave Kleikamp 285617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 286ac27a0ecSDave Kleikamp { 287617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 288ac27a0ecSDave Kleikamp 289617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 290617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 291ac27a0ecSDave Kleikamp 292ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 293ac27a0ecSDave Kleikamp return; 294ac27a0ecSDave Kleikamp 295ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 296617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 297ac27a0ecSDave Kleikamp 298617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 299ac27a0ecSDave Kleikamp if (journal) 300dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 301ac27a0ecSDave Kleikamp } 302ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 303ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 304ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 305ac27a0ecSDave Kleikamp } 306617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 307ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 308617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 309ac27a0ecSDave Kleikamp sb->s_id); 310ac27a0ecSDave Kleikamp } 311ac27a0ecSDave Kleikamp 312617ba13bSMingming Cao void ext4_error(struct super_block *sb, const char *function, 313ac27a0ecSDave Kleikamp const char *fmt, ...) 314ac27a0ecSDave Kleikamp { 315ac27a0ecSDave Kleikamp va_list args; 316ac27a0ecSDave Kleikamp 317ac27a0ecSDave Kleikamp va_start(args, fmt); 318617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 319ac27a0ecSDave Kleikamp vprintk(fmt, args); 320ac27a0ecSDave Kleikamp printk("\n"); 321ac27a0ecSDave Kleikamp va_end(args); 322ac27a0ecSDave Kleikamp 323617ba13bSMingming Cao ext4_handle_error(sb); 324ac27a0ecSDave Kleikamp } 325ac27a0ecSDave Kleikamp 326617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 327ac27a0ecSDave Kleikamp char nbuf[16]) 328ac27a0ecSDave Kleikamp { 329ac27a0ecSDave Kleikamp char *errstr = NULL; 330ac27a0ecSDave Kleikamp 331ac27a0ecSDave Kleikamp switch (errno) { 332ac27a0ecSDave Kleikamp case -EIO: 333ac27a0ecSDave Kleikamp errstr = "IO failure"; 334ac27a0ecSDave Kleikamp break; 335ac27a0ecSDave Kleikamp case -ENOMEM: 336ac27a0ecSDave Kleikamp errstr = "Out of memory"; 337ac27a0ecSDave Kleikamp break; 338ac27a0ecSDave Kleikamp case -EROFS: 339dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 340ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 341ac27a0ecSDave Kleikamp else 342ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 343ac27a0ecSDave Kleikamp break; 344ac27a0ecSDave Kleikamp default: 345ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 346ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 347ac27a0ecSDave Kleikamp * NULL. */ 348ac27a0ecSDave Kleikamp if (nbuf) { 349ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 350ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 351ac27a0ecSDave Kleikamp errstr = nbuf; 352ac27a0ecSDave Kleikamp } 353ac27a0ecSDave Kleikamp break; 354ac27a0ecSDave Kleikamp } 355ac27a0ecSDave Kleikamp 356ac27a0ecSDave Kleikamp return errstr; 357ac27a0ecSDave Kleikamp } 358ac27a0ecSDave Kleikamp 359617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 360ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 361ac27a0ecSDave Kleikamp 3622b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 363ac27a0ecSDave Kleikamp { 364ac27a0ecSDave Kleikamp char nbuf[16]; 365ac27a0ecSDave Kleikamp const char *errstr; 366ac27a0ecSDave Kleikamp 367ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 368ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 369ac27a0ecSDave Kleikamp * an error. */ 370ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 371ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 372ac27a0ecSDave Kleikamp return; 373ac27a0ecSDave Kleikamp 374617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 375617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 376ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 377ac27a0ecSDave Kleikamp 378617ba13bSMingming Cao ext4_handle_error(sb); 379ac27a0ecSDave Kleikamp } 380ac27a0ecSDave Kleikamp 381ac27a0ecSDave Kleikamp /* 382617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 383ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 384ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 385ac27a0ecSDave Kleikamp * 386ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 387ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 388ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 389ac27a0ecSDave Kleikamp */ 390ac27a0ecSDave Kleikamp 391617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 392ac27a0ecSDave Kleikamp const char *fmt, ...) 393ac27a0ecSDave Kleikamp { 394ac27a0ecSDave Kleikamp va_list args; 395ac27a0ecSDave Kleikamp 396617ba13bSMingming Cao printk(KERN_CRIT "ext4_abort called.\n"); 397ac27a0ecSDave Kleikamp 398ac27a0ecSDave Kleikamp va_start(args, fmt); 399617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 400ac27a0ecSDave Kleikamp vprintk(fmt, args); 401ac27a0ecSDave Kleikamp printk("\n"); 402ac27a0ecSDave Kleikamp va_end(args); 403ac27a0ecSDave Kleikamp 404ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 405617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 406ac27a0ecSDave Kleikamp 407ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 408ac27a0ecSDave Kleikamp return; 409ac27a0ecSDave Kleikamp 410ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 411617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 412ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 413617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 414ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 415dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 416ac27a0ecSDave Kleikamp } 417ac27a0ecSDave Kleikamp 418617ba13bSMingming Cao void ext4_warning(struct super_block *sb, const char *function, 419ac27a0ecSDave Kleikamp const char *fmt, ...) 420ac27a0ecSDave Kleikamp { 421ac27a0ecSDave Kleikamp va_list args; 422ac27a0ecSDave Kleikamp 423ac27a0ecSDave Kleikamp va_start(args, fmt); 424617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 425ac27a0ecSDave Kleikamp sb->s_id, function); 426ac27a0ecSDave Kleikamp vprintk(fmt, args); 427ac27a0ecSDave Kleikamp printk("\n"); 428ac27a0ecSDave Kleikamp va_end(args); 429ac27a0ecSDave Kleikamp } 430ac27a0ecSDave Kleikamp 4315d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 4325d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 4335d1b1b3fSAneesh Kumar K.V __releases(bitlock) 4345d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 4355d1b1b3fSAneesh Kumar K.V { 4365d1b1b3fSAneesh Kumar K.V va_list args; 4375d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4385d1b1b3fSAneesh Kumar K.V 4395d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 4405d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 4415d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 4425d1b1b3fSAneesh Kumar K.V printk("\n"); 4435d1b1b3fSAneesh Kumar K.V va_end(args); 4445d1b1b3fSAneesh Kumar K.V 4455d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 4465d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4475d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4485d1b1b3fSAneesh Kumar K.V ext4_commit_super(sb, es, 0); 4495d1b1b3fSAneesh Kumar K.V return; 4505d1b1b3fSAneesh Kumar K.V } 4515d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 4525d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 4535d1b1b3fSAneesh Kumar K.V /* 4545d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 4555d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 4565d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 4575d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 4585d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 4595d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 4605d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 4615d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 4625d1b1b3fSAneesh Kumar K.V * more appropriate error code. 4635d1b1b3fSAneesh Kumar K.V */ 4645d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 4655d1b1b3fSAneesh Kumar K.V return; 4665d1b1b3fSAneesh Kumar K.V } 4675d1b1b3fSAneesh Kumar K.V 4685d1b1b3fSAneesh Kumar K.V 469617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 470ac27a0ecSDave Kleikamp { 471617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 472ac27a0ecSDave Kleikamp 473617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 474ac27a0ecSDave Kleikamp return; 475ac27a0ecSDave Kleikamp 47646e665e9SHarvey Harrison ext4_warning(sb, __func__, 477ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 478ac27a0ecSDave Kleikamp "running e2fsck is recommended", 479617ba13bSMingming Cao EXT4_DYNAMIC_REV); 480ac27a0ecSDave Kleikamp 481617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 482617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 483617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 484ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 485ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 486ac27a0ecSDave Kleikamp 487ac27a0ecSDave Kleikamp /* 488ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 489ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 490ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 491ac27a0ecSDave Kleikamp */ 492ac27a0ecSDave Kleikamp } 493ac27a0ecSDave Kleikamp 494ac27a0ecSDave Kleikamp /* 495ac27a0ecSDave Kleikamp * Open the external journal device 496ac27a0ecSDave Kleikamp */ 497617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 498ac27a0ecSDave Kleikamp { 499ac27a0ecSDave Kleikamp struct block_device *bdev; 500ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 501ac27a0ecSDave Kleikamp 502ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 503ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 504ac27a0ecSDave Kleikamp goto fail; 505ac27a0ecSDave Kleikamp return bdev; 506ac27a0ecSDave Kleikamp 507ac27a0ecSDave Kleikamp fail: 508abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: failed to open journal device %s: %ld\n", 509ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 510ac27a0ecSDave Kleikamp return NULL; 511ac27a0ecSDave Kleikamp } 512ac27a0ecSDave Kleikamp 513ac27a0ecSDave Kleikamp /* 514ac27a0ecSDave Kleikamp * Release the journal device 515ac27a0ecSDave Kleikamp */ 516617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 517ac27a0ecSDave Kleikamp { 518ac27a0ecSDave Kleikamp bd_release(bdev); 5199a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 520ac27a0ecSDave Kleikamp } 521ac27a0ecSDave Kleikamp 522617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 523ac27a0ecSDave Kleikamp { 524ac27a0ecSDave Kleikamp struct block_device *bdev; 525ac27a0ecSDave Kleikamp int ret = -ENODEV; 526ac27a0ecSDave Kleikamp 527ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 528ac27a0ecSDave Kleikamp if (bdev) { 529617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 530ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 531ac27a0ecSDave Kleikamp } 532ac27a0ecSDave Kleikamp return ret; 533ac27a0ecSDave Kleikamp } 534ac27a0ecSDave Kleikamp 535ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 536ac27a0ecSDave Kleikamp { 537617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 538ac27a0ecSDave Kleikamp } 539ac27a0ecSDave Kleikamp 540617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 541ac27a0ecSDave Kleikamp { 542ac27a0ecSDave Kleikamp struct list_head *l; 543ac27a0ecSDave Kleikamp 544ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 545ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 546ac27a0ecSDave Kleikamp 547ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 548ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 549ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 550ac27a0ecSDave Kleikamp printk(KERN_ERR " " 551ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 552ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 553ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 554ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 555ac27a0ecSDave Kleikamp } 556ac27a0ecSDave Kleikamp } 557ac27a0ecSDave Kleikamp 558617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 559ac27a0ecSDave Kleikamp { 560617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 561617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 562ef2cabf7SHidehiro Kawai int i, err; 563ac27a0ecSDave Kleikamp 564c9de560dSAlex Tomas ext4_mb_release(sb); 565a86c6181SAlex Tomas ext4_ext_release(sb); 566617ba13bSMingming Cao ext4_xattr_put_super(sb); 5670390131bSFrank Mayhar if (sbi->s_journal) { 568ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 56947b4a50bSJan Kara sbi->s_journal = NULL; 570ef2cabf7SHidehiro Kawai if (err < 0) 5710390131bSFrank Mayhar ext4_abort(sb, __func__, 5720390131bSFrank Mayhar "Couldn't clean up the journal"); 5730390131bSFrank Mayhar } 574ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 575617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 576ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 577617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 578ac27a0ecSDave Kleikamp } 579240799cdSTheodore Ts'o if (sbi->s_proc) { 580240799cdSTheodore Ts'o remove_proc_entry("inode_readahead_blks", sbi->s_proc); 5819f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 582240799cdSTheodore Ts'o } 583ac27a0ecSDave Kleikamp 584ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 585ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 586ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 587772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 588ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 589ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 590ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 5916bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 592ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 593ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 594ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 595ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 596ac27a0ecSDave Kleikamp #endif 597ac27a0ecSDave Kleikamp 598ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 599ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 600ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 601ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 602ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 603ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 604ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 605ac27a0ecSDave Kleikamp 606f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 607ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 608ac27a0ecSDave Kleikamp /* 609ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 610ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 611ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 612ac27a0ecSDave Kleikamp */ 613ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 614f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 615617ba13bSMingming Cao ext4_blkdev_remove(sbi); 616ac27a0ecSDave Kleikamp } 617ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 618705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 619ac27a0ecSDave Kleikamp kfree(sbi); 620ac27a0ecSDave Kleikamp return; 621ac27a0ecSDave Kleikamp } 622ac27a0ecSDave Kleikamp 623e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 624ac27a0ecSDave Kleikamp 625ac27a0ecSDave Kleikamp /* 626ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 627ac27a0ecSDave Kleikamp */ 628617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 629ac27a0ecSDave Kleikamp { 630617ba13bSMingming Cao struct ext4_inode_info *ei; 631ac27a0ecSDave Kleikamp 632e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 633ac27a0ecSDave Kleikamp if (!ei) 634ac27a0ecSDave Kleikamp return NULL; 63503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 636617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 637617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 638ac27a0ecSDave Kleikamp #endif 639ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 64091246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 641a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 642c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 643c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 6440390131bSFrank Mayhar /* 6450390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 6460390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 6470390131bSFrank Mayhar * jinode. 6480390131bSFrank Mayhar */ 649678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 650d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 651d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 652d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 653d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 654d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 655ac27a0ecSDave Kleikamp return &ei->vfs_inode; 656ac27a0ecSDave Kleikamp } 657ac27a0ecSDave Kleikamp 658617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 659ac27a0ecSDave Kleikamp { 6609f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 6619f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 6629f7dd93dSVasily Averin EXT4_I(inode)); 6639f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 6649f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 6659f7dd93dSVasily Averin true); 6669f7dd93dSVasily Averin dump_stack(); 6679f7dd93dSVasily Averin } 668617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 669ac27a0ecSDave Kleikamp } 670ac27a0ecSDave Kleikamp 67151cc5068SAlexey Dobriyan static void init_once(void *foo) 672ac27a0ecSDave Kleikamp { 673617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 674ac27a0ecSDave Kleikamp 675ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 67603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 677ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 678ac27a0ecSDave Kleikamp #endif 6790e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 680ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 681ac27a0ecSDave Kleikamp } 682ac27a0ecSDave Kleikamp 683ac27a0ecSDave Kleikamp static int init_inodecache(void) 684ac27a0ecSDave Kleikamp { 685617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 686617ba13bSMingming Cao sizeof(struct ext4_inode_info), 687ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 688ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 68920c2df83SPaul Mundt init_once); 690617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 691ac27a0ecSDave Kleikamp return -ENOMEM; 692ac27a0ecSDave Kleikamp return 0; 693ac27a0ecSDave Kleikamp } 694ac27a0ecSDave Kleikamp 695ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 696ac27a0ecSDave Kleikamp { 697617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 698ac27a0ecSDave Kleikamp } 699ac27a0ecSDave Kleikamp 700617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 701ac27a0ecSDave Kleikamp { 70203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 703617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 704617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 705617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 706617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 707ac27a0ecSDave Kleikamp } 708617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 709617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 710617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 711617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 712ac27a0ecSDave Kleikamp } 713ac27a0ecSDave Kleikamp #endif 714c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 7150390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 716678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 717678aaf48SJan Kara &EXT4_I(inode)->jinode); 718ac27a0ecSDave Kleikamp } 719ac27a0ecSDave Kleikamp 7202b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 7212b2d6d01STheodore Ts'o struct super_block *sb) 722ac27a0ecSDave Kleikamp { 723ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 724617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 725ac27a0ecSDave Kleikamp 726ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 727ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 728ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); 729ac27a0ecSDave Kleikamp 730ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 731ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 732ac27a0ecSDave Kleikamp 733ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 734ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 735ac27a0ecSDave Kleikamp 736617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 737ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 738ac27a0ecSDave Kleikamp 739617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 740ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 741ac27a0ecSDave Kleikamp #endif 742ac27a0ecSDave Kleikamp } 743ac27a0ecSDave Kleikamp 744d9c9bef1SMiklos Szeredi /* 745d9c9bef1SMiklos Szeredi * Show an option if 746d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 747d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 748d9c9bef1SMiklos Szeredi */ 749617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 750ac27a0ecSDave Kleikamp { 751aa22df2cSAneesh Kumar K.V int def_errors; 752aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 753ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 754d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 755d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 756d9c9bef1SMiklos Szeredi 757d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 758aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 759d9c9bef1SMiklos Szeredi 760d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 761d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 762d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 763d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 764aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 765d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 766d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 767d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 768d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 769d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 770d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 771d9c9bef1SMiklos Szeredi } 772d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 773d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 774d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 775d9c9bef1SMiklos Szeredi } 776bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 777d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 778bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 779d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 780bb4f397aSAneesh Kumar K.V } 781bb4f397aSAneesh Kumar K.V } 782aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 783bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 784aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 785d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 786aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 787d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 788aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 789d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 790d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 791d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 79203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 793aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 794aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 795d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 796d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 797d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 798d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 799d9c9bef1SMiklos Szeredi } 800d9c9bef1SMiklos Szeredi #endif 80103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 802aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 803d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 804d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 805d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 806d9c9bef1SMiklos Szeredi #endif 807d9c9bef1SMiklos Szeredi if (!test_opt(sb, RESERVATION)) 808d9c9bef1SMiklos Szeredi seq_puts(seq, ",noreservation"); 80930773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 810d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 811d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 812d9c9bef1SMiklos Szeredi } 81330773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 81430773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 81530773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 81630773840STheodore Ts'o } 81730773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 81830773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 81930773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 82030773840STheodore Ts'o } 82130773840STheodore Ts'o 822571640caSEric Sandeen /* 823571640caSEric Sandeen * We're changing the default of barrier mount option, so 824571640caSEric Sandeen * let's always display its mount state so it's clear what its 825571640caSEric Sandeen * status is. 826571640caSEric Sandeen */ 827571640caSEric Sandeen seq_puts(seq, ",barrier="); 828571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 829cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 830cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 831d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 832d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 83325ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 83425ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 835dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 836dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 837dd919b98SAneesh Kumar K.V 838ac27a0ecSDave Kleikamp 839cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 840cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 841aa22df2cSAneesh Kumar K.V /* 842aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 843aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 844aa22df2cSAneesh Kumar K.V */ 845617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 846ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 847617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 848ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 849617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 850ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 851ac27a0ecSDave Kleikamp 852240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 853240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 854240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 855240799cdSTheodore Ts'o 8565bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 8575bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 8585bf5683aSHidehiro Kawai 859617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 860ac27a0ecSDave Kleikamp return 0; 861ac27a0ecSDave Kleikamp } 862ac27a0ecSDave Kleikamp 863ac27a0ecSDave Kleikamp 8641b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 8651b961ac0SChristoph Hellwig u64 ino, u32 generation) 866ac27a0ecSDave Kleikamp { 867ac27a0ecSDave Kleikamp struct inode *inode; 868ac27a0ecSDave Kleikamp 869617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 870ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 871617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 872ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 873ac27a0ecSDave Kleikamp 874ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 875ac27a0ecSDave Kleikamp * 876617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 877ac27a0ecSDave Kleikamp * deleted, so we should be safe. 878ac27a0ecSDave Kleikamp * 879ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 880ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 881ac27a0ecSDave Kleikamp */ 8821d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 8831d1fe1eeSDavid Howells if (IS_ERR(inode)) 8841d1fe1eeSDavid Howells return ERR_CAST(inode); 8851d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 886ac27a0ecSDave Kleikamp iput(inode); 887ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 888ac27a0ecSDave Kleikamp } 8891b961ac0SChristoph Hellwig 8901b961ac0SChristoph Hellwig return inode; 891ac27a0ecSDave Kleikamp } 8921b961ac0SChristoph Hellwig 8931b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 8941b961ac0SChristoph Hellwig int fh_len, int fh_type) 8951b961ac0SChristoph Hellwig { 8961b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 8971b961ac0SChristoph Hellwig ext4_nfs_get_inode); 8981b961ac0SChristoph Hellwig } 8991b961ac0SChristoph Hellwig 9001b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9011b961ac0SChristoph Hellwig int fh_len, int fh_type) 9021b961ac0SChristoph Hellwig { 9031b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 9041b961ac0SChristoph Hellwig ext4_nfs_get_inode); 905ac27a0ecSDave Kleikamp } 906ac27a0ecSDave Kleikamp 907c39a7f84SToshiyuki Okajima /* 908c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 909c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 910c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 911c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 912c39a7f84SToshiyuki Okajima */ 913c39a7f84SToshiyuki Okajima static int bdev_try_to_free_page(struct super_block *sb, struct page *page, gfp_t wait) 914c39a7f84SToshiyuki Okajima { 915c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 916c39a7f84SToshiyuki Okajima 917c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 918c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 919c39a7f84SToshiyuki Okajima return 0; 920c39a7f84SToshiyuki Okajima if (journal) 921c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 922c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 923c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 924c39a7f84SToshiyuki Okajima } 925c39a7f84SToshiyuki Okajima 926ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 927ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 928ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 929ac27a0ecSDave Kleikamp 930617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 931617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 932617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 933617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 934617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 9356f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 9366f28e087SJan Kara char *path, int remount); 937617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 938617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 939ac27a0ecSDave Kleikamp size_t len, loff_t off); 940617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 941ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 942ac27a0ecSDave Kleikamp 943617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 944edf72453SJan Kara .initialize = dquot_initialize, 945edf72453SJan Kara .drop = dquot_drop, 946ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 94760e58e0fSMingming Cao .reserve_space = dquot_reserve_space, 94860e58e0fSMingming Cao .claim_space = dquot_claim_space, 94960e58e0fSMingming Cao .release_rsv = dquot_release_reserved_space, 95060e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 951ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 952ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 953ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 954ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 955617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 956617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 957617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 958617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 959a5b5ee32SJan Kara .write_info = ext4_write_info, 960a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 961a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 962ac27a0ecSDave Kleikamp }; 963ac27a0ecSDave Kleikamp 964617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 965617ba13bSMingming Cao .quota_on = ext4_quota_on, 966ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 967ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 968ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 969ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 970ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 971ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 972ac27a0ecSDave Kleikamp }; 973ac27a0ecSDave Kleikamp #endif 974ac27a0ecSDave Kleikamp 975ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 976617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 977617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 978617ba13bSMingming Cao .write_inode = ext4_write_inode, 979617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 980617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 981617ba13bSMingming Cao .put_super = ext4_put_super, 982617ba13bSMingming Cao .write_super = ext4_write_super, 983617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 984c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 985c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 986617ba13bSMingming Cao .statfs = ext4_statfs, 987617ba13bSMingming Cao .remount_fs = ext4_remount, 988617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 989617ba13bSMingming Cao .show_options = ext4_show_options, 990ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 991617ba13bSMingming Cao .quota_read = ext4_quota_read, 992617ba13bSMingming Cao .quota_write = ext4_quota_write, 993ac27a0ecSDave Kleikamp #endif 994c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 995ac27a0ecSDave Kleikamp }; 996ac27a0ecSDave Kleikamp 99739655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 9981b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 9991b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1000617ba13bSMingming Cao .get_parent = ext4_get_parent, 1001ac27a0ecSDave Kleikamp }; 1002ac27a0ecSDave Kleikamp 1003ac27a0ecSDave Kleikamp enum { 1004ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1005ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 100601436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1007ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 1008ac27a0ecSDave Kleikamp Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 100930773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1010c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1011818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1012ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 10135bf5683aSHidehiro Kawai Opt_data_err_abort, Opt_data_err_ignore, 1014ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 1015ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 1016ac27a0ecSDave Kleikamp Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 101783982b6fSTheodore Ts'o Opt_grpquota, Opt_i_version, 101801436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 1019b3881f74STheodore Ts'o Opt_inode_readahead_blks, Opt_journal_ioprio 1020ac27a0ecSDave Kleikamp }; 1021ac27a0ecSDave Kleikamp 1022a447c093SSteven Whitehouse static const match_table_t tokens = { 1023ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1024ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1025ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1026ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1027ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1028ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1029ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1030ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1031ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1032ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1033ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1034ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1035ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1036ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1037ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1038ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1039ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1040ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1041ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1042ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1043ac27a0ecSDave Kleikamp {Opt_reservation, "reservation"}, 1044ac27a0ecSDave Kleikamp {Opt_noreservation, "noreservation"}, 1045ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1046ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1047ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1048ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 104930773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 105030773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1051ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1052ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1053818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1054818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1055ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1056ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1057ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1058ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 10595bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 10605bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1061ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1062ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1063ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1064ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1065ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1066ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 1067ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1068ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1069ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1070ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1071ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 107225ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1073c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1074ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 107564769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1076dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 1077240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1078b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1079f3f12faaSJosef Bacik {Opt_err, NULL}, 1080ac27a0ecSDave Kleikamp }; 1081ac27a0ecSDave Kleikamp 1082617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1083ac27a0ecSDave Kleikamp { 1084617ba13bSMingming Cao ext4_fsblk_t sb_block; 1085ac27a0ecSDave Kleikamp char *options = (char *) *data; 1086ac27a0ecSDave Kleikamp 1087ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1088ac27a0ecSDave Kleikamp return 1; /* Default location */ 1089ac27a0ecSDave Kleikamp options += 3; 1090617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 1091ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1092ac27a0ecSDave Kleikamp if (*options && *options != ',') { 10934776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1094ac27a0ecSDave Kleikamp (char *) *data); 1095ac27a0ecSDave Kleikamp return 1; 1096ac27a0ecSDave Kleikamp } 1097ac27a0ecSDave Kleikamp if (*options == ',') 1098ac27a0ecSDave Kleikamp options++; 1099ac27a0ecSDave Kleikamp *data = (void *) options; 1100ac27a0ecSDave Kleikamp return sb_block; 1101ac27a0ecSDave Kleikamp } 1102ac27a0ecSDave Kleikamp 1103b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1104b3881f74STheodore Ts'o 1105ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1106c3191067STheodore Ts'o unsigned long *journal_devnum, 1107b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1108617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1109ac27a0ecSDave Kleikamp { 1110617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1111ac27a0ecSDave Kleikamp char *p; 1112ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1113ac27a0ecSDave Kleikamp int data_opt = 0; 1114ac27a0ecSDave Kleikamp int option; 1115ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1116dfc5d03fSJan Kara int qtype, qfmt; 1117ac27a0ecSDave Kleikamp char *qname; 1118ac27a0ecSDave Kleikamp #endif 1119ac27a0ecSDave Kleikamp 1120ac27a0ecSDave Kleikamp if (!options) 1121ac27a0ecSDave Kleikamp return 1; 1122ac27a0ecSDave Kleikamp 1123ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1124ac27a0ecSDave Kleikamp int token; 1125ac27a0ecSDave Kleikamp if (!*p) 1126ac27a0ecSDave Kleikamp continue; 1127ac27a0ecSDave Kleikamp 1128ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1129ac27a0ecSDave Kleikamp switch (token) { 1130ac27a0ecSDave Kleikamp case Opt_bsd_df: 1131ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1132ac27a0ecSDave Kleikamp break; 1133ac27a0ecSDave Kleikamp case Opt_minix_df: 1134ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1135ac27a0ecSDave Kleikamp break; 1136ac27a0ecSDave Kleikamp case Opt_grpid: 1137ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1138ac27a0ecSDave Kleikamp break; 1139ac27a0ecSDave Kleikamp case Opt_nogrpid: 1140ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1141ac27a0ecSDave Kleikamp break; 1142ac27a0ecSDave Kleikamp case Opt_resuid: 1143ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1144ac27a0ecSDave Kleikamp return 0; 1145ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1146ac27a0ecSDave Kleikamp break; 1147ac27a0ecSDave Kleikamp case Opt_resgid: 1148ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1149ac27a0ecSDave Kleikamp return 0; 1150ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1151ac27a0ecSDave Kleikamp break; 1152ac27a0ecSDave Kleikamp case Opt_sb: 1153ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1154ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1155ac27a0ecSDave Kleikamp break; 1156ac27a0ecSDave Kleikamp case Opt_err_panic: 1157ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1158ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1159ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1160ac27a0ecSDave Kleikamp break; 1161ac27a0ecSDave Kleikamp case Opt_err_ro: 1162ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1163ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1164ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1165ac27a0ecSDave Kleikamp break; 1166ac27a0ecSDave Kleikamp case Opt_err_cont: 1167ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1168ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1169ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1170ac27a0ecSDave Kleikamp break; 1171ac27a0ecSDave Kleikamp case Opt_nouid32: 1172ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1173ac27a0ecSDave Kleikamp break; 1174ac27a0ecSDave Kleikamp case Opt_debug: 1175ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1176ac27a0ecSDave Kleikamp break; 1177ac27a0ecSDave Kleikamp case Opt_oldalloc: 1178ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1179ac27a0ecSDave Kleikamp break; 1180ac27a0ecSDave Kleikamp case Opt_orlov: 1181ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1182ac27a0ecSDave Kleikamp break; 118303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1184ac27a0ecSDave Kleikamp case Opt_user_xattr: 1185ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1186ac27a0ecSDave Kleikamp break; 1187ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1188ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1189ac27a0ecSDave Kleikamp break; 1190ac27a0ecSDave Kleikamp #else 1191ac27a0ecSDave Kleikamp case Opt_user_xattr: 1192ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 11934776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)user_xattr options " 11944776004fSTheodore Ts'o "not supported\n"); 1195ac27a0ecSDave Kleikamp break; 1196ac27a0ecSDave Kleikamp #endif 119703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1198ac27a0ecSDave Kleikamp case Opt_acl: 1199ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1200ac27a0ecSDave Kleikamp break; 1201ac27a0ecSDave Kleikamp case Opt_noacl: 1202ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1203ac27a0ecSDave Kleikamp break; 1204ac27a0ecSDave Kleikamp #else 1205ac27a0ecSDave Kleikamp case Opt_acl: 1206ac27a0ecSDave Kleikamp case Opt_noacl: 12074776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)acl options " 12084776004fSTheodore Ts'o "not supported\n"); 1209ac27a0ecSDave Kleikamp break; 1210ac27a0ecSDave Kleikamp #endif 1211ac27a0ecSDave Kleikamp case Opt_reservation: 1212ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1213ac27a0ecSDave Kleikamp break; 1214ac27a0ecSDave Kleikamp case Opt_noreservation: 1215ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, RESERVATION); 1216ac27a0ecSDave Kleikamp break; 1217ac27a0ecSDave Kleikamp case Opt_journal_update: 1218ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1219ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1220ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1221ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1222ac27a0ecSDave Kleikamp journal file. */ 1223ac27a0ecSDave Kleikamp if (is_remount) { 1224617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1225ac27a0ecSDave Kleikamp "journal on remount\n"); 1226ac27a0ecSDave Kleikamp return 0; 1227ac27a0ecSDave Kleikamp } 1228ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1229ac27a0ecSDave Kleikamp break; 1230ac27a0ecSDave Kleikamp case Opt_journal_dev: 1231ac27a0ecSDave Kleikamp if (is_remount) { 1232617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1233ac27a0ecSDave Kleikamp "journal on remount\n"); 1234ac27a0ecSDave Kleikamp return 0; 1235ac27a0ecSDave Kleikamp } 1236ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1237ac27a0ecSDave Kleikamp return 0; 1238ac27a0ecSDave Kleikamp *journal_devnum = option; 1239ac27a0ecSDave Kleikamp break; 1240818d276cSGirish Shilamkar case Opt_journal_checksum: 1241818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1242818d276cSGirish Shilamkar break; 1243818d276cSGirish Shilamkar case Opt_journal_async_commit: 1244818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1245818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1246818d276cSGirish Shilamkar break; 1247ac27a0ecSDave Kleikamp case Opt_noload: 1248ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1249ac27a0ecSDave Kleikamp break; 1250ac27a0ecSDave Kleikamp case Opt_commit: 1251ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1252ac27a0ecSDave Kleikamp return 0; 1253ac27a0ecSDave Kleikamp if (option < 0) 1254ac27a0ecSDave Kleikamp return 0; 1255ac27a0ecSDave Kleikamp if (option == 0) 1256cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1257ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1258ac27a0ecSDave Kleikamp break; 125930773840STheodore Ts'o case Opt_max_batch_time: 126030773840STheodore Ts'o if (match_int(&args[0], &option)) 126130773840STheodore Ts'o return 0; 126230773840STheodore Ts'o if (option < 0) 126330773840STheodore Ts'o return 0; 126430773840STheodore Ts'o if (option == 0) 126530773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 126630773840STheodore Ts'o sbi->s_max_batch_time = option; 126730773840STheodore Ts'o break; 126830773840STheodore Ts'o case Opt_min_batch_time: 126930773840STheodore Ts'o if (match_int(&args[0], &option)) 127030773840STheodore Ts'o return 0; 127130773840STheodore Ts'o if (option < 0) 127230773840STheodore Ts'o return 0; 127330773840STheodore Ts'o sbi->s_min_batch_time = option; 127430773840STheodore Ts'o break; 1275ac27a0ecSDave Kleikamp case Opt_data_journal: 1276617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1277ac27a0ecSDave Kleikamp goto datacheck; 1278ac27a0ecSDave Kleikamp case Opt_data_ordered: 1279617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1280ac27a0ecSDave Kleikamp goto datacheck; 1281ac27a0ecSDave Kleikamp case Opt_data_writeback: 1282617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1283ac27a0ecSDave Kleikamp datacheck: 1284ac27a0ecSDave Kleikamp if (is_remount) { 1285617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1286ac27a0ecSDave Kleikamp != data_opt) { 1287ac27a0ecSDave Kleikamp printk(KERN_ERR 1288617ba13bSMingming Cao "EXT4-fs: cannot change data " 1289ac27a0ecSDave Kleikamp "mode on remount\n"); 1290ac27a0ecSDave Kleikamp return 0; 1291ac27a0ecSDave Kleikamp } 1292ac27a0ecSDave Kleikamp } else { 1293617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1294ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1295ac27a0ecSDave Kleikamp } 1296ac27a0ecSDave Kleikamp break; 12975bf5683aSHidehiro Kawai case Opt_data_err_abort: 12985bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 12995bf5683aSHidehiro Kawai break; 13005bf5683aSHidehiro Kawai case Opt_data_err_ignore: 13015bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13025bf5683aSHidehiro Kawai break; 1303ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1304ac27a0ecSDave Kleikamp case Opt_usrjquota: 1305ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1306ac27a0ecSDave Kleikamp goto set_qf_name; 1307ac27a0ecSDave Kleikamp case Opt_grpjquota: 1308ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1309ac27a0ecSDave Kleikamp set_qf_name: 131017bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1311dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1312ac27a0ecSDave Kleikamp printk(KERN_ERR 13132c8be6b2SJan Kara "EXT4-fs: Cannot change journaled " 1314ac27a0ecSDave Kleikamp "quota options when quota turned on.\n"); 1315ac27a0ecSDave Kleikamp return 0; 1316ac27a0ecSDave Kleikamp } 1317ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1318ac27a0ecSDave Kleikamp if (!qname) { 1319ac27a0ecSDave Kleikamp printk(KERN_ERR 1320617ba13bSMingming Cao "EXT4-fs: not enough memory for " 1321ac27a0ecSDave Kleikamp "storing quotafile name.\n"); 1322ac27a0ecSDave Kleikamp return 0; 1323ac27a0ecSDave Kleikamp } 1324ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1325ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1326ac27a0ecSDave Kleikamp printk(KERN_ERR 1327617ba13bSMingming Cao "EXT4-fs: %s quota file already " 1328ac27a0ecSDave Kleikamp "specified.\n", QTYPE2NAME(qtype)); 1329ac27a0ecSDave Kleikamp kfree(qname); 1330ac27a0ecSDave Kleikamp return 0; 1331ac27a0ecSDave Kleikamp } 1332ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1333ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1334ac27a0ecSDave Kleikamp printk(KERN_ERR 1335617ba13bSMingming Cao "EXT4-fs: quotafile must be on " 1336ac27a0ecSDave Kleikamp "filesystem root.\n"); 1337ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1338ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1339ac27a0ecSDave Kleikamp return 0; 1340ac27a0ecSDave Kleikamp } 1341ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1342ac27a0ecSDave Kleikamp break; 1343ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1344ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1345ac27a0ecSDave Kleikamp goto clear_qf_name; 1346ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1347ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1348ac27a0ecSDave Kleikamp clear_qf_name: 134917bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1350dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1351617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 13522c8be6b2SJan Kara "journaled quota options when " 1353ac27a0ecSDave Kleikamp "quota turned on.\n"); 1354ac27a0ecSDave Kleikamp return 0; 1355ac27a0ecSDave Kleikamp } 1356ac27a0ecSDave Kleikamp /* 1357ac27a0ecSDave Kleikamp * The space will be released later when all options 1358ac27a0ecSDave Kleikamp * are confirmed to be correct 1359ac27a0ecSDave Kleikamp */ 1360ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1361ac27a0ecSDave Kleikamp break; 1362ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1363dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1364dfc5d03fSJan Kara goto set_qf_format; 1365ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1366dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1367dfc5d03fSJan Kara set_qf_format: 136817bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1369dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1370dfc5d03fSJan Kara printk(KERN_ERR "EXT4-fs: Cannot change " 1371dfc5d03fSJan Kara "journaled quota options when " 1372dfc5d03fSJan Kara "quota turned on.\n"); 1373dfc5d03fSJan Kara return 0; 1374dfc5d03fSJan Kara } 1375dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1376ac27a0ecSDave Kleikamp break; 1377ac27a0ecSDave Kleikamp case Opt_quota: 1378ac27a0ecSDave Kleikamp case Opt_usrquota: 1379ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1380ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1381ac27a0ecSDave Kleikamp break; 1382ac27a0ecSDave Kleikamp case Opt_grpquota: 1383ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1384ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1385ac27a0ecSDave Kleikamp break; 1386ac27a0ecSDave Kleikamp case Opt_noquota: 138717bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1388617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1389ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1390ac27a0ecSDave Kleikamp return 0; 1391ac27a0ecSDave Kleikamp } 1392ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1393ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1394ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1395ac27a0ecSDave Kleikamp break; 1396ac27a0ecSDave Kleikamp #else 1397ac27a0ecSDave Kleikamp case Opt_quota: 1398ac27a0ecSDave Kleikamp case Opt_usrquota: 1399ac27a0ecSDave Kleikamp case Opt_grpquota: 1400cd59e7b9SJan Kara printk(KERN_ERR 1401cd59e7b9SJan Kara "EXT4-fs: quota options not supported.\n"); 1402cd59e7b9SJan Kara break; 1403ac27a0ecSDave Kleikamp case Opt_usrjquota: 1404ac27a0ecSDave Kleikamp case Opt_grpjquota: 1405ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1406ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1407ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1408ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1409ac27a0ecSDave Kleikamp printk(KERN_ERR 1410cd59e7b9SJan Kara "EXT4-fs: journaled quota options not " 1411ac27a0ecSDave Kleikamp "supported.\n"); 1412ac27a0ecSDave Kleikamp break; 1413ac27a0ecSDave Kleikamp case Opt_noquota: 1414ac27a0ecSDave Kleikamp break; 1415ac27a0ecSDave Kleikamp #endif 1416ac27a0ecSDave Kleikamp case Opt_abort: 1417ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1418ac27a0ecSDave Kleikamp break; 1419ac27a0ecSDave Kleikamp case Opt_barrier: 1420ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1421ac27a0ecSDave Kleikamp return 0; 1422ac27a0ecSDave Kleikamp if (option) 1423ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1424ac27a0ecSDave Kleikamp else 1425ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1426ac27a0ecSDave Kleikamp break; 1427ac27a0ecSDave Kleikamp case Opt_ignore: 1428ac27a0ecSDave Kleikamp break; 1429ac27a0ecSDave Kleikamp case Opt_resize: 1430ac27a0ecSDave Kleikamp if (!is_remount) { 1431617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1432ac27a0ecSDave Kleikamp "for remount\n"); 1433ac27a0ecSDave Kleikamp return 0; 1434ac27a0ecSDave Kleikamp } 1435ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1436ac27a0ecSDave Kleikamp return 0; 1437ac27a0ecSDave Kleikamp *n_blocks_count = option; 1438ac27a0ecSDave Kleikamp break; 1439ac27a0ecSDave Kleikamp case Opt_nobh: 1440ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1441ac27a0ecSDave Kleikamp break; 1442ac27a0ecSDave Kleikamp case Opt_bh: 1443ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1444ac27a0ecSDave Kleikamp break; 144525ec56b5SJean Noel Cordenner case Opt_i_version: 144625ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 144725ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 144825ec56b5SJean Noel Cordenner break; 1449dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1450dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1451dd919b98SAneesh Kumar K.V break; 1452c9de560dSAlex Tomas case Opt_stripe: 1453c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1454c9de560dSAlex Tomas return 0; 1455c9de560dSAlex Tomas if (option < 0) 1456c9de560dSAlex Tomas return 0; 1457c9de560dSAlex Tomas sbi->s_stripe = option; 1458c9de560dSAlex Tomas break; 145964769240SAlex Tomas case Opt_delalloc: 146064769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 146164769240SAlex Tomas break; 1462240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1463240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1464240799cdSTheodore Ts'o return 0; 1465240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1466240799cdSTheodore Ts'o return 0; 1467240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1468240799cdSTheodore Ts'o break; 1469b3881f74STheodore Ts'o case Opt_journal_ioprio: 1470b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1471b3881f74STheodore Ts'o return 0; 1472b3881f74STheodore Ts'o if (option < 0 || option > 7) 1473b3881f74STheodore Ts'o break; 1474b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1475b3881f74STheodore Ts'o option); 1476b3881f74STheodore Ts'o break; 1477ac27a0ecSDave Kleikamp default: 1478ac27a0ecSDave Kleikamp printk(KERN_ERR 1479617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1480ac27a0ecSDave Kleikamp "or missing value\n", p); 1481ac27a0ecSDave Kleikamp return 0; 1482ac27a0ecSDave Kleikamp } 1483ac27a0ecSDave Kleikamp } 1484ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1485ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1486617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1487ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1488ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1489ac27a0ecSDave Kleikamp 1490617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1491ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1492ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1493ac27a0ecSDave Kleikamp 1494ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1495617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1496ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1497617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1498617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1499ac27a0ecSDave Kleikamp "format mixing.\n"); 1500ac27a0ecSDave Kleikamp return 0; 1501ac27a0ecSDave Kleikamp } 1502ac27a0ecSDave Kleikamp 1503ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 15042c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 1505ac27a0ecSDave Kleikamp "not specified.\n"); 1506ac27a0ecSDave Kleikamp return 0; 1507ac27a0ecSDave Kleikamp } 1508ac27a0ecSDave Kleikamp } else { 1509ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 15102c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 15112c8be6b2SJan Kara "specified with no journaling " 1512ac27a0ecSDave Kleikamp "enabled.\n"); 1513ac27a0ecSDave Kleikamp return 0; 1514ac27a0ecSDave Kleikamp } 1515ac27a0ecSDave Kleikamp } 1516ac27a0ecSDave Kleikamp #endif 1517ac27a0ecSDave Kleikamp return 1; 1518ac27a0ecSDave Kleikamp } 1519ac27a0ecSDave Kleikamp 1520617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1521ac27a0ecSDave Kleikamp int read_only) 1522ac27a0ecSDave Kleikamp { 1523617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1524ac27a0ecSDave Kleikamp int res = 0; 1525ac27a0ecSDave Kleikamp 1526617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1527617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs warning: revision level too high, " 1528ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1529ac27a0ecSDave Kleikamp res = MS_RDONLY; 1530ac27a0ecSDave Kleikamp } 1531ac27a0ecSDave Kleikamp if (read_only) 1532ac27a0ecSDave Kleikamp return res; 1533617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1534617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1535ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1536617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1537ac27a0ecSDave Kleikamp printk(KERN_WARNING 1538617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1539ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1540ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1541ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1542ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1543ac27a0ecSDave Kleikamp printk(KERN_WARNING 1544617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1545ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1546ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1547ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1548ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1549ac27a0ecSDave Kleikamp printk(KERN_WARNING 1550617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1551ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 15520390131bSFrank Mayhar if (!sbi->s_journal) 1553216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1554ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1555617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1556e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1557ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1558617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 15590390131bSFrank Mayhar if (sbi->s_journal) 1560617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1561ac27a0ecSDave Kleikamp 1562617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1563ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1564a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1565ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1566ac27a0ecSDave Kleikamp sb->s_blocksize, 1567ac27a0ecSDave Kleikamp sbi->s_groups_count, 1568617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1569617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1570ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1571ac27a0ecSDave Kleikamp 15720390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 157305496769STheodore Ts'o printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", 157405496769STheodore Ts'o sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : 157505496769STheodore Ts'o "external", EXT4_SB(sb)->s_journal->j_devname); 15760390131bSFrank Mayhar } else { 15770390131bSFrank Mayhar printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); 15780390131bSFrank Mayhar } 1579ac27a0ecSDave Kleikamp return res; 1580ac27a0ecSDave Kleikamp } 1581ac27a0ecSDave Kleikamp 1582772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1583772cb7c8SJose R. Santos { 1584772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1585772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1586772cb7c8SJose R. Santos struct buffer_head *bh; 1587772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1588772cb7c8SJose R. Santos ext4_group_t flex_group; 1589772cb7c8SJose R. Santos int groups_per_flex = 0; 1590772cb7c8SJose R. Santos int i; 1591772cb7c8SJose R. Santos 1592772cb7c8SJose R. Santos if (!sbi->s_es->s_log_groups_per_flex) { 1593772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1594772cb7c8SJose R. Santos return 1; 1595772cb7c8SJose R. Santos } 1596772cb7c8SJose R. Santos 1597772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1598772cb7c8SJose R. Santos groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1599772cb7c8SJose R. Santos 1600c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1601c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1602d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1603d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1604ec05e868SLi Zefan sbi->s_flex_groups = kzalloc(flex_group_count * 1605772cb7c8SJose R. Santos sizeof(struct flex_groups), GFP_KERNEL); 1606772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1607ec05e868SLi Zefan printk(KERN_ERR "EXT4-fs: not enough memory for " 1608a9df9a49STheodore Ts'o "%u flex groups\n", flex_group_count); 1609772cb7c8SJose R. Santos goto failed; 1610772cb7c8SJose R. Santos } 1611772cb7c8SJose R. Santos 1612772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 1613772cb7c8SJose R. Santos gdp = ext4_get_group_desc(sb, i, &bh); 1614772cb7c8SJose R. Santos 1615772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 1616772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_inodes += 1617560671a0SAneesh Kumar K.V ext4_free_inodes_count(sb, gdp); 1618772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_blocks += 1619560671a0SAneesh Kumar K.V ext4_free_blks_count(sb, gdp); 1620772cb7c8SJose R. Santos } 1621772cb7c8SJose R. Santos 1622772cb7c8SJose R. Santos return 1; 1623772cb7c8SJose R. Santos failed: 1624772cb7c8SJose R. Santos return 0; 1625772cb7c8SJose R. Santos } 1626772cb7c8SJose R. Santos 1627717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1628717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1629717d50e4SAndreas Dilger { 1630717d50e4SAndreas Dilger __u16 crc = 0; 1631717d50e4SAndreas Dilger 1632717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1633717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1634717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1635717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1636717d50e4SAndreas Dilger 1637717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1638717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1639717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1640717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1641717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1642717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1643717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1644717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1645717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1646717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1647717d50e4SAndreas Dilger offset); 1648717d50e4SAndreas Dilger } 1649717d50e4SAndreas Dilger 1650717d50e4SAndreas Dilger return cpu_to_le16(crc); 1651717d50e4SAndreas Dilger } 1652717d50e4SAndreas Dilger 1653717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1654717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1655717d50e4SAndreas Dilger { 1656717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1657717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1658717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1659717d50e4SAndreas Dilger return 0; 1660717d50e4SAndreas Dilger 1661717d50e4SAndreas Dilger return 1; 1662717d50e4SAndreas Dilger } 1663717d50e4SAndreas Dilger 1664ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1665617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1666ac27a0ecSDave Kleikamp { 1667617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1668617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1669617ba13bSMingming Cao ext4_fsblk_t last_block; 1670bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1671bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1672bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1673ce421581SJose R. Santos int flexbg_flag = 0; 1674fd2d4291SAvantika Mathur ext4_group_t i; 1675ac27a0ecSDave Kleikamp 1676ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1677ce421581SJose R. Santos flexbg_flag = 1; 1678ce421581SJose R. Santos 1679617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1680ac27a0ecSDave Kleikamp 1681197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1682197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1683197cd65aSAkinobu Mita 1684ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1685bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1686ac27a0ecSDave Kleikamp else 1687ac27a0ecSDave Kleikamp last_block = first_block + 1688617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1689ac27a0ecSDave Kleikamp 16908fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 16912b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1692c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1693a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 16945128273aSEric Sesterhenn "(block %llu)!\n", i, block_bitmap); 1695ac27a0ecSDave Kleikamp return 0; 1696ac27a0ecSDave Kleikamp } 16978fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 16982b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1699c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1700a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 17015128273aSEric Sesterhenn "(block %llu)!\n", i, inode_bitmap); 1702ac27a0ecSDave Kleikamp return 0; 1703ac27a0ecSDave Kleikamp } 17048fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1705bd81d8eeSLaurent Vivier if (inode_table < first_block || 17062b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1707c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1708a9df9a49STheodore Ts'o "Inode table for group %u not in group " 17095128273aSEric Sesterhenn "(block %llu)!\n", i, inode_table); 1710ac27a0ecSDave Kleikamp return 0; 1711ac27a0ecSDave Kleikamp } 1712b5f10eedSEric Sandeen spin_lock(sb_bgl_lock(sbi, i)); 1713717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1714c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1715a9df9a49STheodore Ts'o "Checksum for group %u failed (%u!=%u)\n", 1716fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1717fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 17187ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 17197ee1ec4cSLi Zefan spin_unlock(sb_bgl_lock(sbi, i)); 1720717d50e4SAndreas Dilger return 0; 1721717d50e4SAndreas Dilger } 17227ee1ec4cSLi Zefan } 1723b5f10eedSEric Sandeen spin_unlock(sb_bgl_lock(sbi, i)); 1724ce421581SJose R. Santos if (!flexbg_flag) 1725617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1726ac27a0ecSDave Kleikamp } 1727ac27a0ecSDave Kleikamp 1728bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1729617ba13bSMingming Cao sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 1730ac27a0ecSDave Kleikamp return 1; 1731ac27a0ecSDave Kleikamp } 1732ac27a0ecSDave Kleikamp 1733617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1734ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1735ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1736ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1737ac27a0ecSDave Kleikamp * 1738ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1739ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1740ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1741ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1742ac27a0ecSDave Kleikamp * 1743ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1744ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1745ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1746617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1747ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1748ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1749ac27a0ecSDave Kleikamp */ 1750617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1751617ba13bSMingming Cao struct ext4_super_block *es) 1752ac27a0ecSDave Kleikamp { 1753ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1754ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1755ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1756ac27a0ecSDave Kleikamp int i; 1757ac27a0ecSDave Kleikamp #endif 1758ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1759ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1760ac27a0ecSDave Kleikamp return; 1761ac27a0ecSDave Kleikamp } 1762ac27a0ecSDave Kleikamp 1763a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1764a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1765a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1766a8f48a95SEric Sandeen return; 1767a8f48a95SEric Sandeen } 1768a8f48a95SEric Sandeen 1769617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1770ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1771ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1772ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1773ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1774ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1775ac27a0ecSDave Kleikamp return; 1776ac27a0ecSDave Kleikamp } 1777ac27a0ecSDave Kleikamp 1778ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1779617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1780ac27a0ecSDave Kleikamp sb->s_id); 1781ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1782ac27a0ecSDave Kleikamp } 1783ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1784ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1785ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1786ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1787ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1788617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1789617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1790ac27a0ecSDave Kleikamp if (ret < 0) 1791ac27a0ecSDave Kleikamp printk(KERN_ERR 17922c8be6b2SJan Kara "EXT4-fs: Cannot turn on journaled " 1793ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1794ac27a0ecSDave Kleikamp } 1795ac27a0ecSDave Kleikamp } 1796ac27a0ecSDave Kleikamp #endif 1797ac27a0ecSDave Kleikamp 1798ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1799ac27a0ecSDave Kleikamp struct inode *inode; 1800ac27a0ecSDave Kleikamp 180197bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 180297bd42b9SJosef Bacik if (IS_ERR(inode)) { 1803ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1804ac27a0ecSDave Kleikamp break; 1805ac27a0ecSDave Kleikamp } 1806ac27a0ecSDave Kleikamp 1807617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1808*a269eb18SJan Kara vfs_dq_init(inode); 1809ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1810ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1811e5f8eab8STheodore Ts'o "%s: truncating inode %lu to %lld bytes\n", 181246e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1813e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1814ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1815617ba13bSMingming Cao ext4_truncate(inode); 1816ac27a0ecSDave Kleikamp nr_truncates++; 1817ac27a0ecSDave Kleikamp } else { 1818ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1819ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 182046e665e9SHarvey Harrison __func__, inode->i_ino); 1821ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1822ac27a0ecSDave Kleikamp inode->i_ino); 1823ac27a0ecSDave Kleikamp nr_orphans++; 1824ac27a0ecSDave Kleikamp } 1825ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1826ac27a0ecSDave Kleikamp } 1827ac27a0ecSDave Kleikamp 1828ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 1829ac27a0ecSDave Kleikamp 1830ac27a0ecSDave Kleikamp if (nr_orphans) 1831617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1832ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1833ac27a0ecSDave Kleikamp if (nr_truncates) 1834617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1835ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1836ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1837ac27a0ecSDave Kleikamp /* Turn quotas off */ 1838ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1839ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 18406f28e087SJan Kara vfs_quota_off(sb, i, 0); 1841ac27a0ecSDave Kleikamp } 1842ac27a0ecSDave Kleikamp #endif 1843ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1844ac27a0ecSDave Kleikamp } 1845cd2291a4SEric Sandeen /* 1846cd2291a4SEric Sandeen * Maximal extent format file size. 1847cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1848cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1849cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1850cd2291a4SEric Sandeen * so that won't be a limiting factor. 1851cd2291a4SEric Sandeen * 1852cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1853cd2291a4SEric Sandeen */ 1854f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 1855cd2291a4SEric Sandeen { 1856cd2291a4SEric Sandeen loff_t res; 1857cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1858cd2291a4SEric Sandeen 1859cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1860f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 1861cd2291a4SEric Sandeen /* 1862b3a6ffe1SJens Axboe * CONFIG_LBD is not enabled implies the inode 1863cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1864cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1865cd2291a4SEric Sandeen */ 1866cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1867cd2291a4SEric Sandeen 1868cd2291a4SEric Sandeen /* total blocks in file system block size */ 1869cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1870cd2291a4SEric Sandeen upper_limit <<= blkbits; 1871cd2291a4SEric Sandeen } 1872cd2291a4SEric Sandeen 1873cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1874cd2291a4SEric Sandeen res = 1LL << 32; 1875cd2291a4SEric Sandeen res <<= blkbits; 1876cd2291a4SEric Sandeen res -= 1; 1877cd2291a4SEric Sandeen 1878cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1879cd2291a4SEric Sandeen if (res > upper_limit) 1880cd2291a4SEric Sandeen res = upper_limit; 1881cd2291a4SEric Sandeen 1882cd2291a4SEric Sandeen return res; 1883cd2291a4SEric Sandeen } 1884ac27a0ecSDave Kleikamp 1885ac27a0ecSDave Kleikamp /* 1886cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 18870fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 18880fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1889ac27a0ecSDave Kleikamp */ 1890f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 1891ac27a0ecSDave Kleikamp { 1892617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 18930fc1b451SAneesh Kumar K.V int meta_blocks; 18940fc1b451SAneesh Kumar K.V loff_t upper_limit; 18950fc1b451SAneesh Kumar K.V /* This is calculated to be the largest file size for a 1896cd2291a4SEric Sandeen * dense, bitmapped file such that the total number of 1897ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 18980fc1b451SAneesh Kumar K.V * does not exceed 2^48 -1 18990fc1b451SAneesh Kumar K.V * __u32 i_blocks_lo and _u16 i_blocks_high representing the 19000fc1b451SAneesh Kumar K.V * total number of 512 bytes blocks of the file 19010fc1b451SAneesh Kumar K.V */ 19020fc1b451SAneesh Kumar K.V 1903f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 19040fc1b451SAneesh Kumar K.V /* 1905b3a6ffe1SJens Axboe * !has_huge_files or CONFIG_LBD is not enabled 1906f287a1a5STheodore Ts'o * implies the inode i_block represent total blocks in 1907f287a1a5STheodore Ts'o * 512 bytes 32 == size of vfs inode i_blocks * 8 19080fc1b451SAneesh Kumar K.V */ 19090fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 19100fc1b451SAneesh Kumar K.V 19110fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 19120fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 19130fc1b451SAneesh Kumar K.V 19140fc1b451SAneesh Kumar K.V } else { 19158180a562SAneesh Kumar K.V /* 19168180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 19178180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 19188180a562SAneesh Kumar K.V * represent total number of blocks in 19198180a562SAneesh Kumar K.V * file system block size 19208180a562SAneesh Kumar K.V */ 19210fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 19220fc1b451SAneesh Kumar K.V 19230fc1b451SAneesh Kumar K.V } 19240fc1b451SAneesh Kumar K.V 19250fc1b451SAneesh Kumar K.V /* indirect blocks */ 19260fc1b451SAneesh Kumar K.V meta_blocks = 1; 19270fc1b451SAneesh Kumar K.V /* double indirect blocks */ 19280fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 19290fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 19300fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 19310fc1b451SAneesh Kumar K.V 19320fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 19330fc1b451SAneesh Kumar K.V upper_limit <<= bits; 1934ac27a0ecSDave Kleikamp 1935ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1936ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1937ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1938ac27a0ecSDave Kleikamp res <<= bits; 1939ac27a0ecSDave Kleikamp if (res > upper_limit) 1940ac27a0ecSDave Kleikamp res = upper_limit; 19410fc1b451SAneesh Kumar K.V 19420fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 19430fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 19440fc1b451SAneesh Kumar K.V 1945ac27a0ecSDave Kleikamp return res; 1946ac27a0ecSDave Kleikamp } 1947ac27a0ecSDave Kleikamp 1948617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 194970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1950ac27a0ecSDave Kleikamp { 1951617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1952fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 1953ac27a0ecSDave Kleikamp int has_super = 0; 1954ac27a0ecSDave Kleikamp 1955ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 1956ac27a0ecSDave Kleikamp 1957617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 1958ac27a0ecSDave Kleikamp nr < first_meta_bg) 195970bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 1960ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 1961617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 1962ac27a0ecSDave Kleikamp has_super = 1; 1963617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 1964ac27a0ecSDave Kleikamp } 1965ac27a0ecSDave Kleikamp 1966c9de560dSAlex Tomas /** 1967c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 1968c9de560dSAlex Tomas * @sbi: In memory super block info 1969c9de560dSAlex Tomas * 1970c9de560dSAlex Tomas * If we have specified it via mount option, then 1971c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 1972c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 1973c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 1974c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 1975c9de560dSAlex Tomas * 1976c9de560dSAlex Tomas */ 1977c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 1978c9de560dSAlex Tomas { 1979c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 1980c9de560dSAlex Tomas unsigned long stripe_width = 1981c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 1982c9de560dSAlex Tomas 1983c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 1984c9de560dSAlex Tomas return sbi->s_stripe; 1985c9de560dSAlex Tomas 1986c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 1987c9de560dSAlex Tomas return stripe_width; 1988c9de560dSAlex Tomas 1989c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 1990c9de560dSAlex Tomas return stride; 1991c9de560dSAlex Tomas 1992c9de560dSAlex Tomas return 0; 1993c9de560dSAlex Tomas } 1994ac27a0ecSDave Kleikamp 1995617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 19967477827fSAneesh Kumar K.V __releases(kernel_lock) 19977477827fSAneesh Kumar K.V __acquires(kernel_lock) 19981d03ec98SAneesh Kumar K.V 1999ac27a0ecSDave Kleikamp { 2000ac27a0ecSDave Kleikamp struct buffer_head *bh; 2001617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2002617ba13bSMingming Cao struct ext4_sb_info *sbi; 2003617ba13bSMingming Cao ext4_fsblk_t block; 2004617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 200570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2006ac27a0ecSDave Kleikamp unsigned long offset = 0; 2007ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2008ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2009ac27a0ecSDave Kleikamp struct inode *root; 20109f6200bbSTheodore Ts'o char *cp; 20110390131bSFrank Mayhar const char *descr; 20121d1fe1eeSDavid Howells int ret = -EINVAL; 2013ac27a0ecSDave Kleikamp int blocksize; 20144ec11028STheodore Ts'o unsigned int db_count; 20154ec11028STheodore Ts'o unsigned int i; 2016f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 20173a06d778SAneesh Kumar K.V int features; 2018bd81d8eeSLaurent Vivier __u64 blocks_count; 2019833f4077SPeter Zijlstra int err; 2020b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2021ac27a0ecSDave Kleikamp 2022ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2023ac27a0ecSDave Kleikamp if (!sbi) 2024ac27a0ecSDave Kleikamp return -ENOMEM; 2025705895b6SPekka Enberg 2026705895b6SPekka Enberg sbi->s_blockgroup_lock = 2027705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2028705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2029705895b6SPekka Enberg kfree(sbi); 2030705895b6SPekka Enberg return -ENOMEM; 2031705895b6SPekka Enberg } 2032ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2033ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2034617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2035617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2036240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2037d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2038afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2039afc32f7eSTheodore Ts'o sectors[1]); 2040ac27a0ecSDave Kleikamp 2041ac27a0ecSDave Kleikamp unlock_kernel(); 2042ac27a0ecSDave Kleikamp 20439f6200bbSTheodore Ts'o /* Cleanup superblock name */ 20449f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 20459f6200bbSTheodore Ts'o *cp = '!'; 20469f6200bbSTheodore Ts'o 2047617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2048ac27a0ecSDave Kleikamp if (!blocksize) { 2049617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 2050ac27a0ecSDave Kleikamp goto out_fail; 2051ac27a0ecSDave Kleikamp } 2052ac27a0ecSDave Kleikamp 2053ac27a0ecSDave Kleikamp /* 2054617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2055ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2056ac27a0ecSDave Kleikamp */ 2057617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 205870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 205970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2060ac27a0ecSDave Kleikamp } else { 206170bbb3e0SAndrew Morton logical_sb_block = sb_block; 2062ac27a0ecSDave Kleikamp } 2063ac27a0ecSDave Kleikamp 206470bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2065617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); 2066ac27a0ecSDave Kleikamp goto out_fail; 2067ac27a0ecSDave Kleikamp } 2068ac27a0ecSDave Kleikamp /* 2069ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2070617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2071ac27a0ecSDave Kleikamp */ 2072617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2073ac27a0ecSDave Kleikamp sbi->s_es = es; 2074ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2075617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2076617ba13bSMingming Cao goto cantfind_ext4; 2077afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2078ac27a0ecSDave Kleikamp 2079ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2080ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2081617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2082ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2083617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 2084ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2085617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2086ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 208703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2088617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2089ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 20902e7842b8SHugh Dickins #endif 209103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2092617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2093ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 20942e7842b8SHugh Dickins #endif 2095617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2096617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 2097617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2098617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 2099617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2100617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 2101ac27a0ecSDave Kleikamp 2102617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2103ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2104bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2105ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2106bb4f397aSAneesh Kumar K.V else 2107bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2108ac27a0ecSDave Kleikamp 2109ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2110ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 211130773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 211230773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 211330773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2114ac27a0ecSDave Kleikamp 2115ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 2116571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2117ac27a0ecSDave Kleikamp 21181e2462f9SMingming Cao /* 2119dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2120dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2121dd919b98SAneesh Kumar K.V */ 2122dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2123dd919b98SAneesh Kumar K.V 2124dd919b98SAneesh Kumar K.V 2125b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2126b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2127ac27a0ecSDave Kleikamp goto failed_mount; 2128ac27a0ecSDave Kleikamp 2129ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2130617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2131ac27a0ecSDave Kleikamp 2132617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2133617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2134617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2135617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2136ac27a0ecSDave Kleikamp printk(KERN_WARNING 2137617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 2138ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 2139469108ffSTheodore Tso 2140469108ffSTheodore Tso /* 2141ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2142ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2143ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2144ac27a0ecSDave Kleikamp */ 2145617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 2146ac27a0ecSDave Kleikamp if (features) { 2147617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 21483a06d778SAneesh Kumar K.V "unsupported optional features (%x).\n", sb->s_id, 21493a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 21503a06d778SAneesh Kumar K.V ~EXT4_FEATURE_INCOMPAT_SUPP)); 2151ac27a0ecSDave Kleikamp goto failed_mount; 2152ac27a0ecSDave Kleikamp } 2153617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 2154ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 2155617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 21563a06d778SAneesh Kumar K.V "unsupported optional features (%x).\n", sb->s_id, 21573a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 21583a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2159ac27a0ecSDave Kleikamp goto failed_mount; 2160ac27a0ecSDave Kleikamp } 2161f287a1a5STheodore Ts'o has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2162f287a1a5STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2163f287a1a5STheodore Ts'o if (has_huge_files) { 21640fc1b451SAneesh Kumar K.V /* 21650fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 2166b3a6ffe1SJens Axboe * mount if kernel is build with CONFIG_LBD 21670fc1b451SAneesh Kumar K.V */ 21680fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 21690fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 21700fc1b451SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " 21710fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 2172b3a6ffe1SJens Axboe "without CONFIG_LBD.\n", sb->s_id); 21730fc1b451SAneesh Kumar K.V goto failed_mount; 21740fc1b451SAneesh Kumar K.V } 21750fc1b451SAneesh Kumar K.V } 2176ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2177ac27a0ecSDave Kleikamp 2178617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2179617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2180ac27a0ecSDave Kleikamp printk(KERN_ERR 2181617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 2182ac27a0ecSDave Kleikamp blocksize, sb->s_id); 2183ac27a0ecSDave Kleikamp goto failed_mount; 2184ac27a0ecSDave Kleikamp } 2185ac27a0ecSDave Kleikamp 2186ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2187ce40733cSAneesh Kumar K.V 2188ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2189ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2190ce40733cSAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: bad block size %d.\n", 2191ce40733cSAneesh Kumar K.V blocksize); 2192ac27a0ecSDave Kleikamp goto failed_mount; 2193ac27a0ecSDave Kleikamp } 2194ac27a0ecSDave Kleikamp 2195ac27a0ecSDave Kleikamp brelse(bh); 219670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 219770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 219870bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2199ac27a0ecSDave Kleikamp if (!bh) { 2200ac27a0ecSDave Kleikamp printk(KERN_ERR 2201617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 2202ac27a0ecSDave Kleikamp goto failed_mount; 2203ac27a0ecSDave Kleikamp } 2204617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2205ac27a0ecSDave Kleikamp sbi->s_es = es; 2206617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2207ac27a0ecSDave Kleikamp printk(KERN_ERR 2208617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 2209ac27a0ecSDave Kleikamp goto failed_mount; 2210ac27a0ecSDave Kleikamp } 2211ac27a0ecSDave Kleikamp } 2212ac27a0ecSDave Kleikamp 2213f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2214f287a1a5STheodore Ts'o has_huge_files); 2215f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2216ac27a0ecSDave Kleikamp 2217617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2218617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2219617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2220ac27a0ecSDave Kleikamp } else { 2221ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2222ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2223617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 22241330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2225ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2226ac27a0ecSDave Kleikamp printk(KERN_ERR 2227617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 2228ac27a0ecSDave Kleikamp sbi->s_inode_size); 2229ac27a0ecSDave Kleikamp goto failed_mount; 2230ac27a0ecSDave Kleikamp } 2231ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2232ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2233ac27a0ecSDave Kleikamp } 22340d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 22350d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 22368fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 22370d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2238d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 22390d1ee42fSAlexandre Ratchov printk(KERN_ERR 22408fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 22410d1ee42fSAlexandre Ratchov sbi->s_desc_size); 22420d1ee42fSAlexandre Ratchov goto failed_mount; 22430d1ee42fSAlexandre Ratchov } 22440d1ee42fSAlexandre Ratchov } else 22450d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 2246ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2247ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2248b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2249617ba13bSMingming Cao goto cantfind_ext4; 2250617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2251ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2252617ba13bSMingming Cao goto cantfind_ext4; 2253ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2254ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 22550d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2256ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2257ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2258e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2259e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 2260ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2261ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2262ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2263f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2264f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2265f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2266f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2267f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2268f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2269f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2270f99b2589STheodore Ts'o #else 2271f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2272f99b2589STheodore Ts'o #endif 2273f99b2589STheodore Ts'o sb->s_dirt = 1; 2274f99b2589STheodore Ts'o } 2275ac27a0ecSDave Kleikamp 2276ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2277ac27a0ecSDave Kleikamp printk(KERN_ERR 2278617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 2279ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2280ac27a0ecSDave Kleikamp goto failed_mount; 2281ac27a0ecSDave Kleikamp } 2282ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2283ac27a0ecSDave Kleikamp printk(KERN_ERR 2284617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 2285ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2286ac27a0ecSDave Kleikamp goto failed_mount; 2287ac27a0ecSDave Kleikamp } 2288ac27a0ecSDave Kleikamp 2289bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2290ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2291617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 2292ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 2293ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 2294617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 2295ac27a0ecSDave Kleikamp "enabled\n"); 2296ac27a0ecSDave Kleikamp goto failed_mount; 2297ac27a0ecSDave Kleikamp } 2298ac27a0ecSDave Kleikamp 2299617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2300617ba13bSMingming Cao goto cantfind_ext4; 2301e7c95593SEric Sandeen 23024ec11028STheodore Ts'o /* 23034ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 23044ec11028STheodore Ts'o * of the filesystem. 23054ec11028STheodore Ts'o */ 23064ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 23074ec11028STheodore Ts'o printk(KERN_WARNING "EXT4-fs: bad geometry: first data" 23084ec11028STheodore Ts'o "block %u is beyond end of filesystem (%llu)\n", 2309e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 23104ec11028STheodore Ts'o ext4_blocks_count(es)); 2311e7c95593SEric Sandeen goto failed_mount; 2312e7c95593SEric Sandeen } 2313bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2314bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2315bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2316bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 23174ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 23184ec11028STheodore Ts'o printk(KERN_WARNING "EXT4-fs: groups count too large: %u " 23194ec11028STheodore Ts'o "(block count %llu, first data block %u, " 23204ec11028STheodore Ts'o "blocks per group %lu)\n", sbi->s_groups_count, 23214ec11028STheodore Ts'o ext4_blocks_count(es), 23224ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 23234ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 23244ec11028STheodore Ts'o goto failed_mount; 23254ec11028STheodore Ts'o } 2326bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2327617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2328617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2329ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2330ac27a0ecSDave Kleikamp GFP_KERNEL); 2331ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2332617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: not enough memory\n"); 2333ac27a0ecSDave Kleikamp goto failed_mount; 2334ac27a0ecSDave Kleikamp } 2335ac27a0ecSDave Kleikamp 23363244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 23379f6200bbSTheodore Ts'o if (ext4_proc_root) 23389f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 23399f6200bbSTheodore Ts'o 2340240799cdSTheodore Ts'o if (sbi->s_proc) 2341240799cdSTheodore Ts'o proc_create_data("inode_readahead_blks", 0644, sbi->s_proc, 2342240799cdSTheodore Ts'o &ext4_ui_proc_fops, 2343240799cdSTheodore Ts'o &sbi->s_inode_readahead_blks); 23443244fcb1SAlexander Beregalov #endif 2345240799cdSTheodore Ts'o 2346705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2347ac27a0ecSDave Kleikamp 2348ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 234970bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2350ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2351ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2352617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: " 2353ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 2354ac27a0ecSDave Kleikamp db_count = i; 2355ac27a0ecSDave Kleikamp goto failed_mount2; 2356ac27a0ecSDave Kleikamp } 2357ac27a0ecSDave Kleikamp } 2358617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2359617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 2360ac27a0ecSDave Kleikamp goto failed_mount2; 2361ac27a0ecSDave Kleikamp } 2362772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2363772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2364772cb7c8SJose R. Santos printk(KERN_ERR 2365772cb7c8SJose R. Santos "EXT4-fs: unable to initialize " 2366772cb7c8SJose R. Santos "flex_bg meta info!\n"); 2367772cb7c8SJose R. Santos goto failed_mount2; 2368772cb7c8SJose R. Santos } 2369772cb7c8SJose R. Santos 2370ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2371ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2372ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2373ac27a0ecSDave Kleikamp 2374833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2375617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2376833f4077SPeter Zijlstra if (!err) { 2377833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2378617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2379833f4077SPeter Zijlstra } 2380833f4077SPeter Zijlstra if (!err) { 2381833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2382617ba13bSMingming Cao ext4_count_dirs(sb)); 2383833f4077SPeter Zijlstra } 23846bc6e63fSAneesh Kumar K.V if (!err) { 23856bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 23866bc6e63fSAneesh Kumar K.V } 2387833f4077SPeter Zijlstra if (err) { 2388833f4077SPeter Zijlstra printk(KERN_ERR "EXT4-fs: insufficient memory\n"); 2389833f4077SPeter Zijlstra goto failed_mount3; 2390833f4077SPeter Zijlstra } 2391ac27a0ecSDave Kleikamp 2392c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2393c9de560dSAlex Tomas 2394ac27a0ecSDave Kleikamp /* 2395ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2396ac27a0ecSDave Kleikamp */ 2397617ba13bSMingming Cao sb->s_op = &ext4_sops; 2398617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2399617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2400ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2401617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2402617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2403ac27a0ecSDave Kleikamp #endif 2404ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 2405ac27a0ecSDave Kleikamp 2406ac27a0ecSDave Kleikamp sb->s_root = NULL; 2407ac27a0ecSDave Kleikamp 2408ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2409617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2410617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2411ac27a0ecSDave Kleikamp 2412ac27a0ecSDave Kleikamp /* 2413ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2414ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2415ac27a0ecSDave Kleikamp */ 2416ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2417617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2418617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2419ac27a0ecSDave Kleikamp goto failed_mount3; 2420624080edSTheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && 2421624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit) { 2422624080edSTheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): " 2423624080edSTheodore Ts'o "ext4_fill_super: Journal transaction " 2424624080edSTheodore Ts'o "%u is corrupt\n", sb->s_id, 2425624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit); 2426624080edSTheodore Ts'o if (test_opt(sb, ERRORS_RO)) { 2427624080edSTheodore Ts'o printk(KERN_CRIT 2428624080edSTheodore Ts'o "Mounting filesystem read-only\n"); 2429624080edSTheodore Ts'o sb->s_flags |= MS_RDONLY; 2430624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2431624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2432624080edSTheodore Ts'o } 2433624080edSTheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) { 2434624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2435624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2436624080edSTheodore Ts'o ext4_commit_super(sb, es, 1); 2437624080edSTheodore Ts'o goto failed_mount4; 2438624080edSTheodore Ts'o } 2439624080edSTheodore Ts'o } 24400390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 24410390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 24420390131bSFrank Mayhar printk(KERN_ERR "EXT4-fs: required journal recovery " 24430390131bSFrank Mayhar "suppressed and not mounted read-only\n"); 24440390131bSFrank Mayhar goto failed_mount4; 2445ac27a0ecSDave Kleikamp } else { 24460390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 24470390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 24480390131bSFrank Mayhar sbi->s_journal = NULL; 24490390131bSFrank Mayhar needs_recovery = 0; 24500390131bSFrank Mayhar goto no_journal; 2451ac27a0ecSDave Kleikamp } 2452ac27a0ecSDave Kleikamp 2453eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2454eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2455eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2456abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: Failed to set 64-bit journal feature\n"); 2457eb40a09cSJose R. Santos goto failed_mount4; 2458eb40a09cSJose R. Santos } 2459eb40a09cSJose R. Santos 2460818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2461818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2462818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2463818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2464818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2465818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2466818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2467818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2468818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2469818d276cSGirish Shilamkar } else { 2470818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2471818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2472818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2473818d276cSGirish Shilamkar } 2474818d276cSGirish Shilamkar 2475ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2476ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2477ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2478ac27a0ecSDave Kleikamp case 0: 2479ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 248063f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 248163f57933SAndrew Morton * cope, else JOURNAL_DATA 248263f57933SAndrew Morton */ 2483dab291afSMingming Cao if (jbd2_journal_check_available_features 2484dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2485ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2486ac27a0ecSDave Kleikamp else 2487ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2488ac27a0ecSDave Kleikamp break; 2489ac27a0ecSDave Kleikamp 2490617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2491617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2492dab291afSMingming Cao if (!jbd2_journal_check_available_features 2493dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2494617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 2495ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 2496ac27a0ecSDave Kleikamp goto failed_mount4; 2497ac27a0ecSDave Kleikamp } 2498ac27a0ecSDave Kleikamp default: 2499ac27a0ecSDave Kleikamp break; 2500ac27a0ecSDave Kleikamp } 2501b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2502ac27a0ecSDave Kleikamp 25030390131bSFrank Mayhar no_journal: 2504ac27a0ecSDave Kleikamp 2505ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2506617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2507617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 2508ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 2509ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2510ac27a0ecSDave Kleikamp } 2511ac27a0ecSDave Kleikamp } 2512ac27a0ecSDave Kleikamp /* 2513dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2514ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2515ac27a0ecSDave Kleikamp */ 2516ac27a0ecSDave Kleikamp 25171d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 25181d1fe1eeSDavid Howells if (IS_ERR(root)) { 2519617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 25201d1fe1eeSDavid Howells ret = PTR_ERR(root); 2521ac27a0ecSDave Kleikamp goto failed_mount4; 2522ac27a0ecSDave Kleikamp } 2523ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 25241d1fe1eeSDavid Howells iput(root); 2525617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 2526ac27a0ecSDave Kleikamp goto failed_mount4; 2527ac27a0ecSDave Kleikamp } 25281d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 25291d1fe1eeSDavid Howells if (!sb->s_root) { 25301d1fe1eeSDavid Howells printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); 25311d1fe1eeSDavid Howells iput(root); 25321d1fe1eeSDavid Howells ret = -ENOMEM; 25331d1fe1eeSDavid Howells goto failed_mount4; 25341d1fe1eeSDavid Howells } 2535ac27a0ecSDave Kleikamp 2536617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2537ef7f3835SKalpak Shah 2538ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2539ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2540ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2541ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2542ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2543ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2544ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2545ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2546ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2547ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2548ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2549ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2550ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2551ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2552ef7f3835SKalpak Shah } 2553ef7f3835SKalpak Shah } 2554ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2555ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2556ef7f3835SKalpak Shah sbi->s_inode_size) { 2557ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2558ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2559ef7f3835SKalpak Shah printk(KERN_INFO "EXT4-fs: required extra inode space not" 2560ef7f3835SKalpak Shah "available.\n"); 2561ef7f3835SKalpak Shah } 2562ef7f3835SKalpak Shah 2563c2774d84SAneesh Kumar K.V if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2564c2774d84SAneesh Kumar K.V printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " 2565c2774d84SAneesh Kumar K.V "requested data journaling mode\n"); 2566c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 2567c2774d84SAneesh Kumar K.V } else if (test_opt(sb, DELALLOC)) 2568c2774d84SAneesh Kumar K.V printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); 2569c2774d84SAneesh Kumar K.V 2570c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 2571c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 2572c2774d84SAneesh Kumar K.V if (err) { 2573c2774d84SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", 2574c2774d84SAneesh Kumar K.V err); 2575c2774d84SAneesh Kumar K.V goto failed_mount4; 2576c2774d84SAneesh Kumar K.V } 2577c2774d84SAneesh Kumar K.V 2578ac27a0ecSDave Kleikamp /* 2579ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 2580ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 2581ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 2582ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 2583ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 2584ac27a0ecSDave Kleikamp * superblock lock. 2585ac27a0ecSDave Kleikamp */ 2586617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2587617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2588617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 25890390131bSFrank Mayhar if (needs_recovery) { 2590617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: recovery complete.\n"); 2591617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 25920390131bSFrank Mayhar } 25930390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 25940390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 25950390131bSFrank Mayhar descr = " journalled data mode"; 25960390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 25970390131bSFrank Mayhar descr = " ordered data mode"; 25980390131bSFrank Mayhar else 25990390131bSFrank Mayhar descr = " writeback data mode"; 26000390131bSFrank Mayhar } else 26010390131bSFrank Mayhar descr = "out journal"; 26020390131bSFrank Mayhar 26030390131bSFrank Mayhar printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", 26040390131bSFrank Mayhar sb->s_id, descr); 2605ac27a0ecSDave Kleikamp 2606ac27a0ecSDave Kleikamp lock_kernel(); 2607ac27a0ecSDave Kleikamp return 0; 2608ac27a0ecSDave Kleikamp 2609617ba13bSMingming Cao cantfind_ext4: 2610ac27a0ecSDave Kleikamp if (!silent) 2611617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 2612ac27a0ecSDave Kleikamp sb->s_id); 2613ac27a0ecSDave Kleikamp goto failed_mount; 2614ac27a0ecSDave Kleikamp 2615ac27a0ecSDave Kleikamp failed_mount4: 26160390131bSFrank Mayhar printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); 26170390131bSFrank Mayhar if (sbi->s_journal) { 2618dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 261947b4a50bSJan Kara sbi->s_journal = NULL; 26200390131bSFrank Mayhar } 2621ac27a0ecSDave Kleikamp failed_mount3: 2622ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2623ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2624ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 26256bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 2626ac27a0ecSDave Kleikamp failed_mount2: 2627ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2628ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2629ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2630ac27a0ecSDave Kleikamp failed_mount: 2631240799cdSTheodore Ts'o if (sbi->s_proc) { 2632240799cdSTheodore Ts'o remove_proc_entry("inode_readahead_blks", sbi->s_proc); 26339f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 2634240799cdSTheodore Ts'o } 2635ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2636ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2637ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2638ac27a0ecSDave Kleikamp #endif 2639617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2640ac27a0ecSDave Kleikamp brelse(bh); 2641ac27a0ecSDave Kleikamp out_fail: 2642ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2643ac27a0ecSDave Kleikamp kfree(sbi); 2644ac27a0ecSDave Kleikamp lock_kernel(); 26451d1fe1eeSDavid Howells return ret; 2646ac27a0ecSDave Kleikamp } 2647ac27a0ecSDave Kleikamp 2648ac27a0ecSDave Kleikamp /* 2649ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2650ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2651ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2652ac27a0ecSDave Kleikamp */ 2653617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2654ac27a0ecSDave Kleikamp { 2655617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2656ac27a0ecSDave Kleikamp 2657ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 265830773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 265930773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 2660ac27a0ecSDave Kleikamp 2661ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2662ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2663dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2664ac27a0ecSDave Kleikamp else 2665dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 26665bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 26675bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 26685bf5683aSHidehiro Kawai else 26695bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 2670ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2671ac27a0ecSDave Kleikamp } 2672ac27a0ecSDave Kleikamp 2673617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2674ac27a0ecSDave Kleikamp unsigned int journal_inum) 2675ac27a0ecSDave Kleikamp { 2676ac27a0ecSDave Kleikamp struct inode *journal_inode; 2677ac27a0ecSDave Kleikamp journal_t *journal; 2678ac27a0ecSDave Kleikamp 26790390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 26800390131bSFrank Mayhar 2681ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2682ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2683ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2684ac27a0ecSDave Kleikamp 26851d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 26861d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 2687617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 2688ac27a0ecSDave Kleikamp return NULL; 2689ac27a0ecSDave Kleikamp } 2690ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2691ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2692ac27a0ecSDave Kleikamp iput(journal_inode); 2693617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 2694ac27a0ecSDave Kleikamp return NULL; 2695ac27a0ecSDave Kleikamp } 2696ac27a0ecSDave Kleikamp 2697e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 2698ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 26991d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 2700617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 2701ac27a0ecSDave Kleikamp iput(journal_inode); 2702ac27a0ecSDave Kleikamp return NULL; 2703ac27a0ecSDave Kleikamp } 2704ac27a0ecSDave Kleikamp 2705dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2706ac27a0ecSDave Kleikamp if (!journal) { 2707617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 2708ac27a0ecSDave Kleikamp iput(journal_inode); 2709ac27a0ecSDave Kleikamp return NULL; 2710ac27a0ecSDave Kleikamp } 2711ac27a0ecSDave Kleikamp journal->j_private = sb; 2712617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2713ac27a0ecSDave Kleikamp return journal; 2714ac27a0ecSDave Kleikamp } 2715ac27a0ecSDave Kleikamp 2716617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 2717ac27a0ecSDave Kleikamp dev_t j_dev) 2718ac27a0ecSDave Kleikamp { 2719ac27a0ecSDave Kleikamp struct buffer_head *bh; 2720ac27a0ecSDave Kleikamp journal_t *journal; 2721617ba13bSMingming Cao ext4_fsblk_t start; 2722617ba13bSMingming Cao ext4_fsblk_t len; 2723ac27a0ecSDave Kleikamp int hblock, blocksize; 2724617ba13bSMingming Cao ext4_fsblk_t sb_block; 2725ac27a0ecSDave Kleikamp unsigned long offset; 2726617ba13bSMingming Cao struct ext4_super_block *es; 2727ac27a0ecSDave Kleikamp struct block_device *bdev; 2728ac27a0ecSDave Kleikamp 27290390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 27300390131bSFrank Mayhar 2731617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 2732ac27a0ecSDave Kleikamp if (bdev == NULL) 2733ac27a0ecSDave Kleikamp return NULL; 2734ac27a0ecSDave Kleikamp 2735ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 2736ac27a0ecSDave Kleikamp printk(KERN_ERR 2737abda1418STheodore Ts'o "EXT4-fs: failed to claim external journal device.\n"); 27389a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 2739ac27a0ecSDave Kleikamp return NULL; 2740ac27a0ecSDave Kleikamp } 2741ac27a0ecSDave Kleikamp 2742ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2743ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2744ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2745ac27a0ecSDave Kleikamp printk(KERN_ERR 2746617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2747ac27a0ecSDave Kleikamp goto out_bdev; 2748ac27a0ecSDave Kleikamp } 2749ac27a0ecSDave Kleikamp 2750617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2751617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2752ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2753ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2754617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2755ac27a0ecSDave Kleikamp "external journal\n"); 2756ac27a0ecSDave Kleikamp goto out_bdev; 2757ac27a0ecSDave Kleikamp } 2758ac27a0ecSDave Kleikamp 2759617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2760617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2761ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2762617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 2763617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 2764ac27a0ecSDave Kleikamp "bad superblock\n"); 2765ac27a0ecSDave Kleikamp brelse(bh); 2766ac27a0ecSDave Kleikamp goto out_bdev; 2767ac27a0ecSDave Kleikamp } 2768ac27a0ecSDave Kleikamp 2769617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 2770617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 2771ac27a0ecSDave Kleikamp brelse(bh); 2772ac27a0ecSDave Kleikamp goto out_bdev; 2773ac27a0ecSDave Kleikamp } 2774ac27a0ecSDave Kleikamp 2775bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 2776ac27a0ecSDave Kleikamp start = sb_block + 1; 2777ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 2778ac27a0ecSDave Kleikamp 2779dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 2780ac27a0ecSDave Kleikamp start, len, blocksize); 2781ac27a0ecSDave Kleikamp if (!journal) { 2782617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 2783ac27a0ecSDave Kleikamp goto out_bdev; 2784ac27a0ecSDave Kleikamp } 2785ac27a0ecSDave Kleikamp journal->j_private = sb; 2786ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 2787ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 2788ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 2789617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 2790ac27a0ecSDave Kleikamp goto out_journal; 2791ac27a0ecSDave Kleikamp } 2792ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 2793617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 2794ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 2795ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 2796ac27a0ecSDave Kleikamp goto out_journal; 2797ac27a0ecSDave Kleikamp } 2798617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 2799617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2800ac27a0ecSDave Kleikamp return journal; 2801ac27a0ecSDave Kleikamp out_journal: 2802dab291afSMingming Cao jbd2_journal_destroy(journal); 2803ac27a0ecSDave Kleikamp out_bdev: 2804617ba13bSMingming Cao ext4_blkdev_put(bdev); 2805ac27a0ecSDave Kleikamp return NULL; 2806ac27a0ecSDave Kleikamp } 2807ac27a0ecSDave Kleikamp 2808617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 2809617ba13bSMingming Cao struct ext4_super_block *es, 2810ac27a0ecSDave Kleikamp unsigned long journal_devnum) 2811ac27a0ecSDave Kleikamp { 2812ac27a0ecSDave Kleikamp journal_t *journal; 2813ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 2814ac27a0ecSDave Kleikamp dev_t journal_dev; 2815ac27a0ecSDave Kleikamp int err = 0; 2816ac27a0ecSDave Kleikamp int really_read_only; 2817ac27a0ecSDave Kleikamp 28180390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 28190390131bSFrank Mayhar 2820ac27a0ecSDave Kleikamp if (journal_devnum && 2821ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2822617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 2823ac27a0ecSDave Kleikamp "numbers have changed\n"); 2824ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 2825ac27a0ecSDave Kleikamp } else 2826ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 2827ac27a0ecSDave Kleikamp 2828ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 2829ac27a0ecSDave Kleikamp 2830ac27a0ecSDave Kleikamp /* 2831ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 2832ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 2833ac27a0ecSDave Kleikamp * can get read-write access to the device. 2834ac27a0ecSDave Kleikamp */ 2835ac27a0ecSDave Kleikamp 2836617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2837ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2838617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 2839ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 2840ac27a0ecSDave Kleikamp if (really_read_only) { 2841617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 2842ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 2843ac27a0ecSDave Kleikamp return -EROFS; 2844ac27a0ecSDave Kleikamp } 2845617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: write access will " 2846ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 2847ac27a0ecSDave Kleikamp } 2848ac27a0ecSDave Kleikamp } 2849ac27a0ecSDave Kleikamp 2850ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 2851617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 2852ac27a0ecSDave Kleikamp "and inode journals!\n"); 2853ac27a0ecSDave Kleikamp return -EINVAL; 2854ac27a0ecSDave Kleikamp } 2855ac27a0ecSDave Kleikamp 2856ac27a0ecSDave Kleikamp if (journal_inum) { 2857617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2858ac27a0ecSDave Kleikamp return -EINVAL; 2859ac27a0ecSDave Kleikamp } else { 2860617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 2861ac27a0ecSDave Kleikamp return -EINVAL; 2862ac27a0ecSDave Kleikamp } 2863ac27a0ecSDave Kleikamp 28644776004fSTheodore Ts'o if (journal->j_flags & JBD2_BARRIER) 28654776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers enabled\n"); 28664776004fSTheodore Ts'o else 28674776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers disabled\n"); 28684776004fSTheodore Ts'o 2869ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 2870dab291afSMingming Cao err = jbd2_journal_update_format(journal); 2871ac27a0ecSDave Kleikamp if (err) { 2872617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 2873dab291afSMingming Cao jbd2_journal_destroy(journal); 2874ac27a0ecSDave Kleikamp return err; 2875ac27a0ecSDave Kleikamp } 2876ac27a0ecSDave Kleikamp } 2877ac27a0ecSDave Kleikamp 2878617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 2879dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 2880ac27a0ecSDave Kleikamp if (!err) 2881dab291afSMingming Cao err = jbd2_journal_load(journal); 2882ac27a0ecSDave Kleikamp 2883ac27a0ecSDave Kleikamp if (err) { 2884617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 2885dab291afSMingming Cao jbd2_journal_destroy(journal); 2886ac27a0ecSDave Kleikamp return err; 2887ac27a0ecSDave Kleikamp } 2888ac27a0ecSDave Kleikamp 2889617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2890617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2891ac27a0ecSDave Kleikamp 2892ac27a0ecSDave Kleikamp if (journal_devnum && 2893ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2894ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 2895ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2896ac27a0ecSDave Kleikamp 2897ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2898617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2899ac27a0ecSDave Kleikamp } 2900ac27a0ecSDave Kleikamp 2901ac27a0ecSDave Kleikamp return 0; 2902ac27a0ecSDave Kleikamp } 2903ac27a0ecSDave Kleikamp 2904c4be0c1dSTakashi Sato static int ext4_commit_super(struct super_block *sb, 29052b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync) 2906ac27a0ecSDave Kleikamp { 2907617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 2908c4be0c1dSTakashi Sato int error = 0; 2909ac27a0ecSDave Kleikamp 2910ac27a0ecSDave Kleikamp if (!sbh) 2911c4be0c1dSTakashi Sato return error; 2912914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 2913914258bfSTheodore Ts'o /* 2914914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 2915914258bfSTheodore Ts'o * superblock failed. This could happen because the 2916914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 2917914258bfSTheodore Ts'o * be a transient write error and maybe the block will 2918914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 2919914258bfSTheodore Ts'o * write and hope for the best. 2920914258bfSTheodore Ts'o */ 2921abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: previous I/O error to " 2922914258bfSTheodore Ts'o "superblock detected for %s.\n", sb->s_id); 2923914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 2924914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 2925914258bfSTheodore Ts'o } 2926ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 2927afc32f7eSTheodore Ts'o es->s_kbytes_written = 2928afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 2929afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2930afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 29315d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 29325d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 29335d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 29345d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 29355d1b1b3fSAneesh Kumar K.V 2936ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 2937ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 2938914258bfSTheodore Ts'o if (sync) { 2939c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 2940c4be0c1dSTakashi Sato if (error) 2941c4be0c1dSTakashi Sato return error; 2942c4be0c1dSTakashi Sato 2943c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 2944c4be0c1dSTakashi Sato if (error) { 2945abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: I/O error while writing " 2946914258bfSTheodore Ts'o "superblock for %s.\n", sb->s_id); 2947914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 2948914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 2949914258bfSTheodore Ts'o } 2950914258bfSTheodore Ts'o } 2951c4be0c1dSTakashi Sato return error; 2952ac27a0ecSDave Kleikamp } 2953ac27a0ecSDave Kleikamp 2954ac27a0ecSDave Kleikamp 2955ac27a0ecSDave Kleikamp /* 2956ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 2957ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 2958ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 2959ac27a0ecSDave Kleikamp */ 2960617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 2961617ba13bSMingming Cao struct ext4_super_block *es) 2962ac27a0ecSDave Kleikamp { 2963617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2964ac27a0ecSDave Kleikamp 29650390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 29660390131bSFrank Mayhar BUG_ON(journal != NULL); 29670390131bSFrank Mayhar return; 29680390131bSFrank Mayhar } 2969dab291afSMingming Cao jbd2_journal_lock_updates(journal); 29707ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 29717ffe1ea8SHidehiro Kawai goto out; 29727ffe1ea8SHidehiro Kawai 297332c37730SJan Kara lock_super(sb); 2974617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 2975ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 2976617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2977ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2978617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2979ac27a0ecSDave Kleikamp } 298032c37730SJan Kara unlock_super(sb); 29817ffe1ea8SHidehiro Kawai 29827ffe1ea8SHidehiro Kawai out: 2983dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 2984ac27a0ecSDave Kleikamp } 2985ac27a0ecSDave Kleikamp 2986ac27a0ecSDave Kleikamp /* 2987ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 2988ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 2989ac27a0ecSDave Kleikamp * main filesystem now. 2990ac27a0ecSDave Kleikamp */ 2991617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 2992617ba13bSMingming Cao struct ext4_super_block *es) 2993ac27a0ecSDave Kleikamp { 2994ac27a0ecSDave Kleikamp journal_t *journal; 2995ac27a0ecSDave Kleikamp int j_errno; 2996ac27a0ecSDave Kleikamp const char *errstr; 2997ac27a0ecSDave Kleikamp 29980390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 29990390131bSFrank Mayhar 3000617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3001ac27a0ecSDave Kleikamp 3002ac27a0ecSDave Kleikamp /* 3003ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3004617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3005ac27a0ecSDave Kleikamp */ 3006ac27a0ecSDave Kleikamp 3007dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3008ac27a0ecSDave Kleikamp if (j_errno) { 3009ac27a0ecSDave Kleikamp char nbuf[16]; 3010ac27a0ecSDave Kleikamp 3011617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 301246e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 3013ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 301446e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 3015ac27a0ecSDave Kleikamp "filesystem check."); 3016ac27a0ecSDave Kleikamp 3017617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3018617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3019617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 3020ac27a0ecSDave Kleikamp 3021dab291afSMingming Cao jbd2_journal_clear_err(journal); 3022ac27a0ecSDave Kleikamp } 3023ac27a0ecSDave Kleikamp } 3024ac27a0ecSDave Kleikamp 3025ac27a0ecSDave Kleikamp /* 3026ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3027ac27a0ecSDave Kleikamp * and wait on the commit. 3028ac27a0ecSDave Kleikamp */ 3029617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3030ac27a0ecSDave Kleikamp { 3031ac27a0ecSDave Kleikamp journal_t *journal; 30320390131bSFrank Mayhar int ret = 0; 3033ac27a0ecSDave Kleikamp 3034ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3035ac27a0ecSDave Kleikamp return 0; 3036ac27a0ecSDave Kleikamp 3037617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 30380390131bSFrank Mayhar if (journal) { 3039ac27a0ecSDave Kleikamp sb->s_dirt = 0; 3040617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 30410390131bSFrank Mayhar } 30420390131bSFrank Mayhar 3043ac27a0ecSDave Kleikamp return ret; 3044ac27a0ecSDave Kleikamp } 3045ac27a0ecSDave Kleikamp 3046ac27a0ecSDave Kleikamp /* 3047617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 3048ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 304914ce0cb4STheodore Ts'o * point. (We can probably nuke this function altogether, and remove 305014ce0cb4STheodore Ts'o * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) 3051ac27a0ecSDave Kleikamp */ 3052617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3053ac27a0ecSDave Kleikamp { 30540390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 3055ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 3056ac27a0ecSDave Kleikamp BUG(); 3057ac27a0ecSDave Kleikamp sb->s_dirt = 0; 30580390131bSFrank Mayhar } else { 30590390131bSFrank Mayhar ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 30600390131bSFrank Mayhar } 3061ac27a0ecSDave Kleikamp } 3062ac27a0ecSDave Kleikamp 3063617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3064ac27a0ecSDave Kleikamp { 306514ce0cb4STheodore Ts'o int ret = 0; 30669eddacf9SJan Kara tid_t target; 3067ac27a0ecSDave Kleikamp 3068ede86cc4STheodore Ts'o trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); 3069ac27a0ecSDave Kleikamp sb->s_dirt = 0; 30700390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 30719eddacf9SJan Kara if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, 30729eddacf9SJan Kara &target)) { 3073ac27a0ecSDave Kleikamp if (wait) 30749eddacf9SJan Kara jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, 30759eddacf9SJan Kara target); 30769eddacf9SJan Kara } 30770390131bSFrank Mayhar } else { 30780390131bSFrank Mayhar ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait); 30790390131bSFrank Mayhar } 308014ce0cb4STheodore Ts'o return ret; 3081ac27a0ecSDave Kleikamp } 3082ac27a0ecSDave Kleikamp 3083ac27a0ecSDave Kleikamp /* 3084ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3085ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3086ac27a0ecSDave Kleikamp */ 3087c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3088ac27a0ecSDave Kleikamp { 3089c4be0c1dSTakashi Sato int error = 0; 3090c4be0c1dSTakashi Sato journal_t *journal; 3091ac27a0ecSDave Kleikamp sb->s_dirt = 0; 3092ac27a0ecSDave Kleikamp 3093ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 3094c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3095ac27a0ecSDave Kleikamp 30960390131bSFrank Mayhar if (journal) { 3097ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3098dab291afSMingming Cao jbd2_journal_lock_updates(journal); 30997ffe1ea8SHidehiro Kawai 31007ffe1ea8SHidehiro Kawai /* 31010390131bSFrank Mayhar * We don't want to clear needs_recovery flag when we 31020390131bSFrank Mayhar * failed to flush the journal. 31037ffe1ea8SHidehiro Kawai */ 3104c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 3105c4be0c1dSTakashi Sato if (error < 0) 3106c4be0c1dSTakashi Sato goto out; 31070390131bSFrank Mayhar } 3108ac27a0ecSDave Kleikamp 3109ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3110617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3111c4be0c1dSTakashi Sato error = ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 3112c4be0c1dSTakashi Sato if (error) 3113c4be0c1dSTakashi Sato goto out; 3114ac27a0ecSDave Kleikamp } 3115c4be0c1dSTakashi Sato return 0; 3116c4be0c1dSTakashi Sato out: 3117c4be0c1dSTakashi Sato jbd2_journal_unlock_updates(journal); 3118c4be0c1dSTakashi Sato return error; 3119ac27a0ecSDave Kleikamp } 3120ac27a0ecSDave Kleikamp 3121ac27a0ecSDave Kleikamp /* 3122ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3123ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3124ac27a0ecSDave Kleikamp */ 3125c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3126ac27a0ecSDave Kleikamp { 31270390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) { 3128ac27a0ecSDave Kleikamp lock_super(sb); 3129ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 3130617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3131617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 3132ac27a0ecSDave Kleikamp unlock_super(sb); 3133dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3134ac27a0ecSDave Kleikamp } 3135c4be0c1dSTakashi Sato return 0; 3136ac27a0ecSDave Kleikamp } 3137ac27a0ecSDave Kleikamp 3138617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3139ac27a0ecSDave Kleikamp { 3140617ba13bSMingming Cao struct ext4_super_block *es; 3141617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3142617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3143ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3144617ba13bSMingming Cao struct ext4_mount_options old_opts; 31458a266467STheodore Ts'o ext4_group_t g; 3146b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3147ac27a0ecSDave Kleikamp int err; 3148ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3149ac27a0ecSDave Kleikamp int i; 3150ac27a0ecSDave Kleikamp #endif 3151ac27a0ecSDave Kleikamp 3152ac27a0ecSDave Kleikamp /* Store the original options */ 3153ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3154ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3155ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3156ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3157ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 315830773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 315930773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3160ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3161ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3162ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3163ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3164ac27a0ecSDave Kleikamp #endif 3165b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3166b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3167ac27a0ecSDave Kleikamp 3168ac27a0ecSDave Kleikamp /* 3169ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3170ac27a0ecSDave Kleikamp */ 3171b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3172b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3173ac27a0ecSDave Kleikamp err = -EINVAL; 3174ac27a0ecSDave Kleikamp goto restore_opts; 3175ac27a0ecSDave Kleikamp } 3176ac27a0ecSDave Kleikamp 3177617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 317846e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3179ac27a0ecSDave Kleikamp 3180ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3181617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 3182ac27a0ecSDave Kleikamp 3183ac27a0ecSDave Kleikamp es = sbi->s_es; 3184ac27a0ecSDave Kleikamp 3185b3881f74STheodore Ts'o if (sbi->s_journal) { 3186617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3187b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3188b3881f74STheodore Ts'o } 3189ac27a0ecSDave Kleikamp 3190ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3191bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 3192617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 3193ac27a0ecSDave Kleikamp err = -EROFS; 3194ac27a0ecSDave Kleikamp goto restore_opts; 3195ac27a0ecSDave Kleikamp } 3196ac27a0ecSDave Kleikamp 3197ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3198ac27a0ecSDave Kleikamp /* 3199ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3200ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3201ac27a0ecSDave Kleikamp */ 3202ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3203ac27a0ecSDave Kleikamp 3204ac27a0ecSDave Kleikamp /* 3205ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3206ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3207ac27a0ecSDave Kleikamp * mark the partition as valid again. 3208ac27a0ecSDave Kleikamp */ 3209617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3210617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3211ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3212ac27a0ecSDave Kleikamp 321332c37730SJan Kara /* 321432c37730SJan Kara * We have to unlock super so that we can wait for 321532c37730SJan Kara * transactions. 321632c37730SJan Kara */ 32170390131bSFrank Mayhar if (sbi->s_journal) { 321832c37730SJan Kara unlock_super(sb); 3219617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 322032c37730SJan Kara lock_super(sb); 32210390131bSFrank Mayhar } 3222ac27a0ecSDave Kleikamp } else { 32233a06d778SAneesh Kumar K.V int ret; 3224617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3225617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 3226617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3227ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 32283a06d778SAneesh Kumar K.V "optional features (%x).\n", sb->s_id, 32293a06d778SAneesh Kumar K.V (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & 32303a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3231ac27a0ecSDave Kleikamp err = -EROFS; 3232ac27a0ecSDave Kleikamp goto restore_opts; 3233ac27a0ecSDave Kleikamp } 3234ead6596bSEric Sandeen 3235ead6596bSEric Sandeen /* 32368a266467STheodore Ts'o * Make sure the group descriptor checksums 32378a266467STheodore Ts'o * are sane. If they aren't, refuse to 32388a266467STheodore Ts'o * remount r/w. 32398a266467STheodore Ts'o */ 32408a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 32418a266467STheodore Ts'o struct ext4_group_desc *gdp = 32428a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 32438a266467STheodore Ts'o 32448a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 32458a266467STheodore Ts'o printk(KERN_ERR 32468a266467STheodore Ts'o "EXT4-fs: ext4_remount: " 3247a9df9a49STheodore Ts'o "Checksum for group %u failed (%u!=%u)\n", 32488a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 32498a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 32508a266467STheodore Ts'o err = -EINVAL; 32518a266467STheodore Ts'o goto restore_opts; 32528a266467STheodore Ts'o } 32538a266467STheodore Ts'o } 32548a266467STheodore Ts'o 32558a266467STheodore Ts'o /* 3256ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3257ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3258ead6596bSEric Sandeen * require a full umount/remount for now. 3259ead6596bSEric Sandeen */ 3260ead6596bSEric Sandeen if (es->s_last_orphan) { 3261ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3262ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3263ead6596bSEric Sandeen "orphan inode list. Please " 3264ead6596bSEric Sandeen "umount/remount instead.\n", 3265ead6596bSEric Sandeen sb->s_id); 3266ead6596bSEric Sandeen err = -EINVAL; 3267ead6596bSEric Sandeen goto restore_opts; 3268ead6596bSEric Sandeen } 3269ead6596bSEric Sandeen 3270ac27a0ecSDave Kleikamp /* 3271ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3272ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3273ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3274ac27a0ecSDave Kleikamp * the partition.) 3275ac27a0ecSDave Kleikamp */ 32760390131bSFrank Mayhar if (sbi->s_journal) 3277617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3278ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3279617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3280ac27a0ecSDave Kleikamp goto restore_opts; 3281617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3282ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3283ac27a0ecSDave Kleikamp } 3284ac27a0ecSDave Kleikamp } 32850390131bSFrank Mayhar if (sbi->s_journal == NULL) 32860390131bSFrank Mayhar ext4_commit_super(sb, es, 1); 32870390131bSFrank Mayhar 3288ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3289ac27a0ecSDave Kleikamp /* Release old quota file names */ 3290ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3291ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3292ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3293ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3294ac27a0ecSDave Kleikamp #endif 3295ac27a0ecSDave Kleikamp return 0; 3296ac27a0ecSDave Kleikamp restore_opts: 3297ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3298ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3299ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3300ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3301ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 330230773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 330330773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3304ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3305ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3306ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3307ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3308ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3309ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3310ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3311ac27a0ecSDave Kleikamp } 3312ac27a0ecSDave Kleikamp #endif 3313ac27a0ecSDave Kleikamp return err; 3314ac27a0ecSDave Kleikamp } 3315ac27a0ecSDave Kleikamp 3316617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3317ac27a0ecSDave Kleikamp { 3318ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3319617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3320617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3321960cc398SPekka Enberg u64 fsid; 3322ac27a0ecSDave Kleikamp 33235e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 33245e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 33256bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 3326fd2d4291SAvantika Mathur ext4_group_t ngroups = sbi->s_groups_count, i; 33275e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3328ac27a0ecSDave Kleikamp smp_rmb(); 3329ac27a0ecSDave Kleikamp 3330ac27a0ecSDave Kleikamp /* 33315e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 33325e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 33335e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3334ac27a0ecSDave Kleikamp */ 3335ac27a0ecSDave Kleikamp 3336ac27a0ecSDave Kleikamp /* 3337ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3338ac27a0ecSDave Kleikamp * overhead 3339ac27a0ecSDave Kleikamp */ 3340ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3341ac27a0ecSDave Kleikamp 3342ac27a0ecSDave Kleikamp /* 3343ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3344ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3345ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3346ac27a0ecSDave Kleikamp */ 3347ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3348617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3349617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3350ac27a0ecSDave Kleikamp cond_resched(); 3351ac27a0ecSDave Kleikamp } 3352ac27a0ecSDave Kleikamp 3353ac27a0ecSDave Kleikamp /* 3354ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3355ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3356ac27a0ecSDave Kleikamp */ 33575e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 33585e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 33595e70030dSBadari Pulavarty smp_wmb(); 33606bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3361ac27a0ecSDave Kleikamp } 3362ac27a0ecSDave Kleikamp 3363617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3364ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 33655e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 33666bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 33676bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3368308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 3369bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3370bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3371ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3372ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 337352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 33745e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3375617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3376960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3377960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3378960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3379960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 3380ac27a0ecSDave Kleikamp return 0; 3381ac27a0ecSDave Kleikamp } 3382ac27a0ecSDave Kleikamp 3383ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 3384ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 3385ac27a0ecSDave Kleikamp * Process 1 Process 2 3386617ba13bSMingming Cao * ext4_create() quota_sync() 3387dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3388*a269eb18SJan Kara * vfs_dq_init() down(dqio_mutex) 3389dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3390ac27a0ecSDave Kleikamp * 3391ac27a0ecSDave Kleikamp */ 3392ac27a0ecSDave Kleikamp 3393ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3394ac27a0ecSDave Kleikamp 3395ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3396ac27a0ecSDave Kleikamp { 3397ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3398ac27a0ecSDave Kleikamp } 3399ac27a0ecSDave Kleikamp 3400617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3401ac27a0ecSDave Kleikamp { 3402ac27a0ecSDave Kleikamp int ret, err; 3403ac27a0ecSDave Kleikamp handle_t *handle; 3404ac27a0ecSDave Kleikamp struct inode *inode; 3405ac27a0ecSDave Kleikamp 3406ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3407617ba13bSMingming Cao handle = ext4_journal_start(inode, 3408617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3409ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3410ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3411ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3412617ba13bSMingming Cao err = ext4_journal_stop(handle); 3413ac27a0ecSDave Kleikamp if (!ret) 3414ac27a0ecSDave Kleikamp ret = err; 3415ac27a0ecSDave Kleikamp return ret; 3416ac27a0ecSDave Kleikamp } 3417ac27a0ecSDave Kleikamp 3418617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3419ac27a0ecSDave Kleikamp { 3420ac27a0ecSDave Kleikamp int ret, err; 3421ac27a0ecSDave Kleikamp handle_t *handle; 3422ac27a0ecSDave Kleikamp 3423617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3424617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3425ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3426ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3427ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3428617ba13bSMingming Cao err = ext4_journal_stop(handle); 3429ac27a0ecSDave Kleikamp if (!ret) 3430ac27a0ecSDave Kleikamp ret = err; 3431ac27a0ecSDave Kleikamp return ret; 3432ac27a0ecSDave Kleikamp } 3433ac27a0ecSDave Kleikamp 3434617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3435ac27a0ecSDave Kleikamp { 3436ac27a0ecSDave Kleikamp int ret, err; 3437ac27a0ecSDave Kleikamp handle_t *handle; 3438ac27a0ecSDave Kleikamp 3439617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3440617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 34419c3013e9SJan Kara if (IS_ERR(handle)) { 34429c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 34439c3013e9SJan Kara dquot_release(dquot); 3444ac27a0ecSDave Kleikamp return PTR_ERR(handle); 34459c3013e9SJan Kara } 3446ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3447617ba13bSMingming Cao err = ext4_journal_stop(handle); 3448ac27a0ecSDave Kleikamp if (!ret) 3449ac27a0ecSDave Kleikamp ret = err; 3450ac27a0ecSDave Kleikamp return ret; 3451ac27a0ecSDave Kleikamp } 3452ac27a0ecSDave Kleikamp 3453617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3454ac27a0ecSDave Kleikamp { 34552c8be6b2SJan Kara /* Are we journaling quotas? */ 3456617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3457617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3458ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3459617ba13bSMingming Cao return ext4_write_dquot(dquot); 3460ac27a0ecSDave Kleikamp } else { 3461ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3462ac27a0ecSDave Kleikamp } 3463ac27a0ecSDave Kleikamp } 3464ac27a0ecSDave Kleikamp 3465617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3466ac27a0ecSDave Kleikamp { 3467ac27a0ecSDave Kleikamp int ret, err; 3468ac27a0ecSDave Kleikamp handle_t *handle; 3469ac27a0ecSDave Kleikamp 3470ac27a0ecSDave Kleikamp /* Data block + inode block */ 3471617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3472ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3473ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3474ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3475617ba13bSMingming Cao err = ext4_journal_stop(handle); 3476ac27a0ecSDave Kleikamp if (!ret) 3477ac27a0ecSDave Kleikamp ret = err; 3478ac27a0ecSDave Kleikamp return ret; 3479ac27a0ecSDave Kleikamp } 3480ac27a0ecSDave Kleikamp 3481ac27a0ecSDave Kleikamp /* 3482ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3483ac27a0ecSDave Kleikamp * the quota file and such... 3484ac27a0ecSDave Kleikamp */ 3485617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3486ac27a0ecSDave Kleikamp { 3487617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3488617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3489ac27a0ecSDave Kleikamp } 3490ac27a0ecSDave Kleikamp 3491ac27a0ecSDave Kleikamp /* 3492ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3493ac27a0ecSDave Kleikamp */ 3494617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 34958264613dSAl Viro char *name, int remount) 3496ac27a0ecSDave Kleikamp { 3497ac27a0ecSDave Kleikamp int err; 34988264613dSAl Viro struct path path; 3499ac27a0ecSDave Kleikamp 3500ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3501ac27a0ecSDave Kleikamp return -EINVAL; 35028264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 35030623543bSJan Kara if (remount) 35048264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 35050623543bSJan Kara 35068264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3507ac27a0ecSDave Kleikamp if (err) 3508ac27a0ecSDave Kleikamp return err; 35090623543bSJan Kara 3510ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 35118264613dSAl Viro if (path.mnt->mnt_sb != sb) { 35128264613dSAl Viro path_put(&path); 3513ac27a0ecSDave Kleikamp return -EXDEV; 3514ac27a0ecSDave Kleikamp } 35150623543bSJan Kara /* Journaling quota? */ 35160623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 35172b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 35188264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3519ac27a0ecSDave Kleikamp printk(KERN_WARNING 3520617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 35210623543bSJan Kara "Journaled quota will not work.\n"); 35220623543bSJan Kara } 35230623543bSJan Kara 35240623543bSJan Kara /* 35250623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 35260623543bSJan Kara * all updates to the file when we bypass pagecache... 35270623543bSJan Kara */ 35280390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 35290390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 35300623543bSJan Kara /* 35310623543bSJan Kara * We don't need to lock updates but journal_flush() could 35320623543bSJan Kara * otherwise be livelocked... 35330623543bSJan Kara */ 35340623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 35357ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 35360623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 35377ffe1ea8SHidehiro Kawai if (err) { 35388264613dSAl Viro path_put(&path); 35397ffe1ea8SHidehiro Kawai return err; 35407ffe1ea8SHidehiro Kawai } 35410623543bSJan Kara } 35420623543bSJan Kara 35438264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 35448264613dSAl Viro path_put(&path); 354577e69dacSAl Viro return err; 3546ac27a0ecSDave Kleikamp } 3547ac27a0ecSDave Kleikamp 3548ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3549ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3550ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3551ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3552617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3553ac27a0ecSDave Kleikamp size_t len, loff_t off) 3554ac27a0ecSDave Kleikamp { 3555ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3556725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3557ac27a0ecSDave Kleikamp int err = 0; 3558ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3559ac27a0ecSDave Kleikamp int tocopy; 3560ac27a0ecSDave Kleikamp size_t toread; 3561ac27a0ecSDave Kleikamp struct buffer_head *bh; 3562ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3563ac27a0ecSDave Kleikamp 3564ac27a0ecSDave Kleikamp if (off > i_size) 3565ac27a0ecSDave Kleikamp return 0; 3566ac27a0ecSDave Kleikamp if (off+len > i_size) 3567ac27a0ecSDave Kleikamp len = i_size-off; 3568ac27a0ecSDave Kleikamp toread = len; 3569ac27a0ecSDave Kleikamp while (toread > 0) { 3570ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3571ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3572617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3573ac27a0ecSDave Kleikamp if (err) 3574ac27a0ecSDave Kleikamp return err; 3575ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3576ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3577ac27a0ecSDave Kleikamp else 3578ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3579ac27a0ecSDave Kleikamp brelse(bh); 3580ac27a0ecSDave Kleikamp offset = 0; 3581ac27a0ecSDave Kleikamp toread -= tocopy; 3582ac27a0ecSDave Kleikamp data += tocopy; 3583ac27a0ecSDave Kleikamp blk++; 3584ac27a0ecSDave Kleikamp } 3585ac27a0ecSDave Kleikamp return len; 3586ac27a0ecSDave Kleikamp } 3587ac27a0ecSDave Kleikamp 3588ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3589ac27a0ecSDave Kleikamp * enough credits) */ 3590617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3591ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3592ac27a0ecSDave Kleikamp { 3593ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3594725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3595ac27a0ecSDave Kleikamp int err = 0; 3596ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3597ac27a0ecSDave Kleikamp int tocopy; 3598617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3599ac27a0ecSDave Kleikamp size_t towrite = len; 3600ac27a0ecSDave Kleikamp struct buffer_head *bh; 3601ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3602ac27a0ecSDave Kleikamp 36030390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 3604e5f8eab8STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" 36059c3013e9SJan Kara " cancelled because transaction is not started.\n", 36069c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 36079c3013e9SJan Kara return -EIO; 36089c3013e9SJan Kara } 3609ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3610ac27a0ecSDave Kleikamp while (towrite > 0) { 3611ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3612ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3613617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3614ac27a0ecSDave Kleikamp if (!bh) 3615ac27a0ecSDave Kleikamp goto out; 3616ac27a0ecSDave Kleikamp if (journal_quota) { 3617617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3618ac27a0ecSDave Kleikamp if (err) { 3619ac27a0ecSDave Kleikamp brelse(bh); 3620ac27a0ecSDave Kleikamp goto out; 3621ac27a0ecSDave Kleikamp } 3622ac27a0ecSDave Kleikamp } 3623ac27a0ecSDave Kleikamp lock_buffer(bh); 3624ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3625ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3626ac27a0ecSDave Kleikamp unlock_buffer(bh); 3627ac27a0ecSDave Kleikamp if (journal_quota) 36280390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 3629ac27a0ecSDave Kleikamp else { 3630ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3631678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3632ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3633ac27a0ecSDave Kleikamp } 3634ac27a0ecSDave Kleikamp brelse(bh); 3635ac27a0ecSDave Kleikamp if (err) 3636ac27a0ecSDave Kleikamp goto out; 3637ac27a0ecSDave Kleikamp offset = 0; 3638ac27a0ecSDave Kleikamp towrite -= tocopy; 3639ac27a0ecSDave Kleikamp data += tocopy; 3640ac27a0ecSDave Kleikamp blk++; 3641ac27a0ecSDave Kleikamp } 3642ac27a0ecSDave Kleikamp out: 36434d04e4fbSJan Kara if (len == towrite) { 36444d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3645ac27a0ecSDave Kleikamp return err; 36464d04e4fbSJan Kara } 3647ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3648ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3649617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3650ac27a0ecSDave Kleikamp } 3651ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3652617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3653ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3654ac27a0ecSDave Kleikamp return len - towrite; 3655ac27a0ecSDave Kleikamp } 3656ac27a0ecSDave Kleikamp 3657ac27a0ecSDave Kleikamp #endif 3658ac27a0ecSDave Kleikamp 3659617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 3660ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 3661ac27a0ecSDave Kleikamp { 3662617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3663ac27a0ecSDave Kleikamp } 3664ac27a0ecSDave Kleikamp 36655e8814f2STheodore Ts'o #ifdef CONFIG_PROC_FS 36665e8814f2STheodore Ts'o static int ext4_ui_proc_show(struct seq_file *m, void *v) 36675e8814f2STheodore Ts'o { 36685e8814f2STheodore Ts'o unsigned int *p = m->private; 36695e8814f2STheodore Ts'o 36705e8814f2STheodore Ts'o seq_printf(m, "%u\n", *p); 36715e8814f2STheodore Ts'o return 0; 36725e8814f2STheodore Ts'o } 36735e8814f2STheodore Ts'o 36745e8814f2STheodore Ts'o static int ext4_ui_proc_open(struct inode *inode, struct file *file) 36755e8814f2STheodore Ts'o { 36765e8814f2STheodore Ts'o return single_open(file, ext4_ui_proc_show, PDE(inode)->data); 36775e8814f2STheodore Ts'o } 36785e8814f2STheodore Ts'o 36795e8814f2STheodore Ts'o static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf, 36805e8814f2STheodore Ts'o size_t cnt, loff_t *ppos) 36815e8814f2STheodore Ts'o { 368223475e26SRoel Kluin unsigned long *p = PDE(file->f_path.dentry->d_inode)->data; 36835e8814f2STheodore Ts'o char str[32]; 36845e8814f2STheodore Ts'o 36855e8814f2STheodore Ts'o if (cnt >= sizeof(str)) 36865e8814f2STheodore Ts'o return -EINVAL; 36875e8814f2STheodore Ts'o if (copy_from_user(str, buf, cnt)) 36885e8814f2STheodore Ts'o return -EFAULT; 368923475e26SRoel Kluin 369023475e26SRoel Kluin *p = simple_strtoul(str, NULL, 0); 36915e8814f2STheodore Ts'o return cnt; 36925e8814f2STheodore Ts'o } 36935e8814f2STheodore Ts'o 36945e8814f2STheodore Ts'o const struct file_operations ext4_ui_proc_fops = { 36955e8814f2STheodore Ts'o .owner = THIS_MODULE, 36965e8814f2STheodore Ts'o .open = ext4_ui_proc_open, 36975e8814f2STheodore Ts'o .read = seq_read, 36985e8814f2STheodore Ts'o .llseek = seq_lseek, 36995e8814f2STheodore Ts'o .release = single_release, 37005e8814f2STheodore Ts'o .write = ext4_ui_proc_write, 37015e8814f2STheodore Ts'o }; 37025e8814f2STheodore Ts'o #endif 37035e8814f2STheodore Ts'o 370403010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 3705ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 370603010a33STheodore Ts'o .name = "ext4", 3707617ba13bSMingming Cao .get_sb = ext4_get_sb, 3708ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3709ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3710ac27a0ecSDave Kleikamp }; 3711ac27a0ecSDave Kleikamp 371203010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 371303010a33STheodore Ts'o static int ext4dev_get_sb(struct file_system_type *fs_type, 371403010a33STheodore Ts'o int flags, const char *dev_name, void *data, struct vfsmount *mnt) 371503010a33STheodore Ts'o { 371603010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Update your userspace programs " 371703010a33STheodore Ts'o "to mount using ext4\n"); 371803010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " 371903010a33STheodore Ts'o "will go away by 2.6.31\n"); 372003010a33STheodore Ts'o return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 372103010a33STheodore Ts'o } 372203010a33STheodore Ts'o 372303010a33STheodore Ts'o static struct file_system_type ext4dev_fs_type = { 372403010a33STheodore Ts'o .owner = THIS_MODULE, 372503010a33STheodore Ts'o .name = "ext4dev", 372603010a33STheodore Ts'o .get_sb = ext4dev_get_sb, 372703010a33STheodore Ts'o .kill_sb = kill_block_super, 372803010a33STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 372903010a33STheodore Ts'o }; 373003010a33STheodore Ts'o MODULE_ALIAS("ext4dev"); 373103010a33STheodore Ts'o #endif 373203010a33STheodore Ts'o 3733617ba13bSMingming Cao static int __init init_ext4_fs(void) 3734ac27a0ecSDave Kleikamp { 3735c9de560dSAlex Tomas int err; 3736c9de560dSAlex Tomas 37379f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 3738c9de560dSAlex Tomas err = init_ext4_mballoc(); 3739ac27a0ecSDave Kleikamp if (err) 3740ac27a0ecSDave Kleikamp return err; 3741c9de560dSAlex Tomas 3742c9de560dSAlex Tomas err = init_ext4_xattr(); 3743c9de560dSAlex Tomas if (err) 3744c9de560dSAlex Tomas goto out2; 3745ac27a0ecSDave Kleikamp err = init_inodecache(); 3746ac27a0ecSDave Kleikamp if (err) 3747ac27a0ecSDave Kleikamp goto out1; 374803010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 3749ac27a0ecSDave Kleikamp if (err) 3750ac27a0ecSDave Kleikamp goto out; 375103010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 375203010a33STheodore Ts'o err = register_filesystem(&ext4dev_fs_type); 375303010a33STheodore Ts'o if (err) { 375403010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 375503010a33STheodore Ts'o goto out; 375603010a33STheodore Ts'o } 375703010a33STheodore Ts'o #endif 3758ac27a0ecSDave Kleikamp return 0; 3759ac27a0ecSDave Kleikamp out: 3760ac27a0ecSDave Kleikamp destroy_inodecache(); 3761ac27a0ecSDave Kleikamp out1: 3762617ba13bSMingming Cao exit_ext4_xattr(); 3763c9de560dSAlex Tomas out2: 3764c9de560dSAlex Tomas exit_ext4_mballoc(); 3765ac27a0ecSDave Kleikamp return err; 3766ac27a0ecSDave Kleikamp } 3767ac27a0ecSDave Kleikamp 3768617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 3769ac27a0ecSDave Kleikamp { 377003010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 377103010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 3772617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 377303010a33STheodore Ts'o #endif 3774ac27a0ecSDave Kleikamp destroy_inodecache(); 3775617ba13bSMingming Cao exit_ext4_xattr(); 3776c9de560dSAlex Tomas exit_ext4_mballoc(); 37779f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 3778ac27a0ecSDave Kleikamp } 3779ac27a0ecSDave Kleikamp 3780ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 378183982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 3782ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 3783617ba13bSMingming Cao module_init(init_ext4_fs) 3784617ba13bSMingming Cao module_exit(exit_ext4_fs) 3785