1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 30ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 31a5694255SChristoph Hellwig #include <linux/exportfs.h> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 389f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 393197ebdbSTheodore Ts'o #include <linux/ctype.h> 40ede86cc4STheodore Ts'o #include <linux/marker.h> 411330593eSVignesh Babu #include <linux/log2.h> 42717d50e4SAndreas Dilger #include <linux/crc16.h> 43ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 44ac27a0ecSDave Kleikamp 453dcf5451SChristoph Hellwig #include "ext4.h" 463dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 47ac27a0ecSDave Kleikamp #include "xattr.h" 48ac27a0ecSDave Kleikamp #include "acl.h" 49ac27a0ecSDave Kleikamp #include "namei.h" 50717d50e4SAndreas Dilger #include "group.h" 51ac27a0ecSDave Kleikamp 529f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 533197ebdbSTheodore Ts'o static struct kset *ext4_kset; 549f6200bbSTheodore Ts'o 55617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 56ac27a0ecSDave Kleikamp unsigned long journal_devnum); 57c4be0c1dSTakashi Sato static int ext4_commit_super(struct super_block *sb, 582b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync); 59617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 60617ba13bSMingming Cao struct ext4_super_block *es); 61617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 62617ba13bSMingming Cao struct ext4_super_block *es); 63617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 64617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 65ac27a0ecSDave Kleikamp char nbuf[16]); 66617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 67617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 68c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 69617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 70c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 71ac27a0ecSDave Kleikamp 72bd81d8eeSLaurent Vivier 738fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 748fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 75bd81d8eeSLaurent Vivier { 763a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 778fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 788fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 79bd81d8eeSLaurent Vivier } 80bd81d8eeSLaurent Vivier 818fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 828fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 83bd81d8eeSLaurent Vivier { 845272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 858fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 868fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 87bd81d8eeSLaurent Vivier } 88bd81d8eeSLaurent Vivier 898fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 908fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 91bd81d8eeSLaurent Vivier { 925272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 938fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 948fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 95bd81d8eeSLaurent Vivier } 96bd81d8eeSLaurent Vivier 97560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 98560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 99560671a0SAneesh Kumar K.V { 100560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 101560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 102560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 103560671a0SAneesh Kumar K.V } 104560671a0SAneesh Kumar K.V 105560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 106560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 107560671a0SAneesh Kumar K.V { 108560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 109560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 110560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 111560671a0SAneesh Kumar K.V } 112560671a0SAneesh Kumar K.V 113560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 114560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 115560671a0SAneesh Kumar K.V { 116560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 117560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 118560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 119560671a0SAneesh Kumar K.V } 120560671a0SAneesh Kumar K.V 121560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 122560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 123560671a0SAneesh Kumar K.V { 124560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 125560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 126560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 127560671a0SAneesh Kumar K.V } 128560671a0SAneesh Kumar K.V 1298fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1308fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 131bd81d8eeSLaurent Vivier { 1323a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1338fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1348fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 135bd81d8eeSLaurent Vivier } 136bd81d8eeSLaurent Vivier 1378fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1388fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 139bd81d8eeSLaurent Vivier { 1405272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1418fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1428fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 143bd81d8eeSLaurent Vivier } 144bd81d8eeSLaurent Vivier 1458fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1468fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 147bd81d8eeSLaurent Vivier { 1485272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1498fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1508fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 151bd81d8eeSLaurent Vivier } 152bd81d8eeSLaurent Vivier 153560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 154560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 155560671a0SAneesh Kumar K.V { 156560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 157560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 158560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 159560671a0SAneesh Kumar K.V } 160560671a0SAneesh Kumar K.V 161560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 162560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 163560671a0SAneesh Kumar K.V { 164560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 165560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 166560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 167560671a0SAneesh Kumar K.V } 168560671a0SAneesh Kumar K.V 169560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 170560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 171560671a0SAneesh Kumar K.V { 172560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 173560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 174560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 175560671a0SAneesh Kumar K.V } 176560671a0SAneesh Kumar K.V 177560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 178560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 179560671a0SAneesh Kumar K.V { 180560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 181560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 182560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 183560671a0SAneesh Kumar K.V } 184560671a0SAneesh Kumar K.V 185ac27a0ecSDave Kleikamp /* 186dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 187ac27a0ecSDave Kleikamp * 188ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 189ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 190ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 191ac27a0ecSDave Kleikamp * appropriate. 192ac27a0ecSDave Kleikamp */ 193617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 194ac27a0ecSDave Kleikamp { 195ac27a0ecSDave Kleikamp journal_t *journal; 196ac27a0ecSDave Kleikamp 197ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 198ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 199ac27a0ecSDave Kleikamp 200ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 201ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 202ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 203617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2040390131bSFrank Mayhar if (journal) { 205ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 20646e665e9SHarvey Harrison ext4_abort(sb, __func__, 207ac27a0ecSDave Kleikamp "Detected aborted journal"); 208ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 209ac27a0ecSDave Kleikamp } 210dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 211ac27a0ecSDave Kleikamp } 2120390131bSFrank Mayhar /* 2130390131bSFrank Mayhar * We're not journaling, return the appropriate indication. 2140390131bSFrank Mayhar */ 2150390131bSFrank Mayhar current->journal_info = EXT4_NOJOURNAL_HANDLE; 2160390131bSFrank Mayhar return current->journal_info; 2170390131bSFrank Mayhar } 218ac27a0ecSDave Kleikamp 219ac27a0ecSDave Kleikamp /* 220ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 221dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 222ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 223ac27a0ecSDave Kleikamp * appropriate. 224ac27a0ecSDave Kleikamp */ 225617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 226ac27a0ecSDave Kleikamp { 227ac27a0ecSDave Kleikamp struct super_block *sb; 228ac27a0ecSDave Kleikamp int err; 229ac27a0ecSDave Kleikamp int rc; 230ac27a0ecSDave Kleikamp 2310390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 2320390131bSFrank Mayhar /* 2330390131bSFrank Mayhar * Do this here since we don't call jbd2_journal_stop() in 2340390131bSFrank Mayhar * no-journal mode. 2350390131bSFrank Mayhar */ 2360390131bSFrank Mayhar current->journal_info = NULL; 2370390131bSFrank Mayhar return 0; 2380390131bSFrank Mayhar } 239ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 240ac27a0ecSDave Kleikamp err = handle->h_err; 241dab291afSMingming Cao rc = jbd2_journal_stop(handle); 242ac27a0ecSDave Kleikamp 243ac27a0ecSDave Kleikamp if (!err) 244ac27a0ecSDave Kleikamp err = rc; 245ac27a0ecSDave Kleikamp if (err) 246617ba13bSMingming Cao __ext4_std_error(sb, where, err); 247ac27a0ecSDave Kleikamp return err; 248ac27a0ecSDave Kleikamp } 249ac27a0ecSDave Kleikamp 250617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 251ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 252ac27a0ecSDave Kleikamp { 253ac27a0ecSDave Kleikamp char nbuf[16]; 254617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 255ac27a0ecSDave Kleikamp 2560390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2570390131bSFrank Mayhar 258ac27a0ecSDave Kleikamp if (bh) 259ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 260ac27a0ecSDave Kleikamp 261ac27a0ecSDave Kleikamp if (!handle->h_err) 262ac27a0ecSDave Kleikamp handle->h_err = err; 263ac27a0ecSDave Kleikamp 264ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 265ac27a0ecSDave Kleikamp return; 266ac27a0ecSDave Kleikamp 267ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 268ac27a0ecSDave Kleikamp caller, errstr, err_fn); 269ac27a0ecSDave Kleikamp 270dab291afSMingming Cao jbd2_journal_abort_handle(handle); 271ac27a0ecSDave Kleikamp } 272ac27a0ecSDave Kleikamp 273ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 274ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 275ac27a0ecSDave Kleikamp * 276ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 277617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 278ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 279ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 280ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 281ac27a0ecSDave Kleikamp * write out the superblock safely. 282ac27a0ecSDave Kleikamp * 283dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 284ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 285ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 286ac27a0ecSDave Kleikamp */ 287ac27a0ecSDave Kleikamp 288617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 289ac27a0ecSDave Kleikamp { 290617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 291ac27a0ecSDave Kleikamp 292617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 293617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 294ac27a0ecSDave Kleikamp 295ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 296ac27a0ecSDave Kleikamp return; 297ac27a0ecSDave Kleikamp 298ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 299617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 300ac27a0ecSDave Kleikamp 301617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 302ac27a0ecSDave Kleikamp if (journal) 303dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 304ac27a0ecSDave Kleikamp } 305ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 306ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 307ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 308ac27a0ecSDave Kleikamp } 309617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 310ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 311617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 312ac27a0ecSDave Kleikamp sb->s_id); 313ac27a0ecSDave Kleikamp } 314ac27a0ecSDave Kleikamp 315617ba13bSMingming Cao void ext4_error(struct super_block *sb, const char *function, 316ac27a0ecSDave Kleikamp const char *fmt, ...) 317ac27a0ecSDave Kleikamp { 318ac27a0ecSDave Kleikamp va_list args; 319ac27a0ecSDave Kleikamp 320ac27a0ecSDave Kleikamp va_start(args, fmt); 321617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 322ac27a0ecSDave Kleikamp vprintk(fmt, args); 323ac27a0ecSDave Kleikamp printk("\n"); 324ac27a0ecSDave Kleikamp va_end(args); 325ac27a0ecSDave Kleikamp 326617ba13bSMingming Cao ext4_handle_error(sb); 327ac27a0ecSDave Kleikamp } 328ac27a0ecSDave Kleikamp 329617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 330ac27a0ecSDave Kleikamp char nbuf[16]) 331ac27a0ecSDave Kleikamp { 332ac27a0ecSDave Kleikamp char *errstr = NULL; 333ac27a0ecSDave Kleikamp 334ac27a0ecSDave Kleikamp switch (errno) { 335ac27a0ecSDave Kleikamp case -EIO: 336ac27a0ecSDave Kleikamp errstr = "IO failure"; 337ac27a0ecSDave Kleikamp break; 338ac27a0ecSDave Kleikamp case -ENOMEM: 339ac27a0ecSDave Kleikamp errstr = "Out of memory"; 340ac27a0ecSDave Kleikamp break; 341ac27a0ecSDave Kleikamp case -EROFS: 342dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 343ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 344ac27a0ecSDave Kleikamp else 345ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 346ac27a0ecSDave Kleikamp break; 347ac27a0ecSDave Kleikamp default: 348ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 349ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 350ac27a0ecSDave Kleikamp * NULL. */ 351ac27a0ecSDave Kleikamp if (nbuf) { 352ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 353ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 354ac27a0ecSDave Kleikamp errstr = nbuf; 355ac27a0ecSDave Kleikamp } 356ac27a0ecSDave Kleikamp break; 357ac27a0ecSDave Kleikamp } 358ac27a0ecSDave Kleikamp 359ac27a0ecSDave Kleikamp return errstr; 360ac27a0ecSDave Kleikamp } 361ac27a0ecSDave Kleikamp 362617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 363ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 364ac27a0ecSDave Kleikamp 3652b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 366ac27a0ecSDave Kleikamp { 367ac27a0ecSDave Kleikamp char nbuf[16]; 368ac27a0ecSDave Kleikamp const char *errstr; 369ac27a0ecSDave Kleikamp 370ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 371ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 372ac27a0ecSDave Kleikamp * an error. */ 373ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 374ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 375ac27a0ecSDave Kleikamp return; 376ac27a0ecSDave Kleikamp 377617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 378617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 379ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 380ac27a0ecSDave Kleikamp 381617ba13bSMingming Cao ext4_handle_error(sb); 382ac27a0ecSDave Kleikamp } 383ac27a0ecSDave Kleikamp 384ac27a0ecSDave Kleikamp /* 385617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 386ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 387ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 388ac27a0ecSDave Kleikamp * 389ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 390ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 391ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 392ac27a0ecSDave Kleikamp */ 393ac27a0ecSDave Kleikamp 394617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 395ac27a0ecSDave Kleikamp const char *fmt, ...) 396ac27a0ecSDave Kleikamp { 397ac27a0ecSDave Kleikamp va_list args; 398ac27a0ecSDave Kleikamp 399617ba13bSMingming Cao printk(KERN_CRIT "ext4_abort called.\n"); 400ac27a0ecSDave Kleikamp 401ac27a0ecSDave Kleikamp va_start(args, fmt); 402617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 403ac27a0ecSDave Kleikamp vprintk(fmt, args); 404ac27a0ecSDave Kleikamp printk("\n"); 405ac27a0ecSDave Kleikamp va_end(args); 406ac27a0ecSDave Kleikamp 407ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 408617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 409ac27a0ecSDave Kleikamp 410ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 411ac27a0ecSDave Kleikamp return; 412ac27a0ecSDave Kleikamp 413ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 414617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 415ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 416617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 417ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 418dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 419ac27a0ecSDave Kleikamp } 420ac27a0ecSDave Kleikamp 421617ba13bSMingming Cao void ext4_warning(struct super_block *sb, const char *function, 422ac27a0ecSDave Kleikamp const char *fmt, ...) 423ac27a0ecSDave Kleikamp { 424ac27a0ecSDave Kleikamp va_list args; 425ac27a0ecSDave Kleikamp 426ac27a0ecSDave Kleikamp va_start(args, fmt); 427617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 428ac27a0ecSDave Kleikamp sb->s_id, function); 429ac27a0ecSDave Kleikamp vprintk(fmt, args); 430ac27a0ecSDave Kleikamp printk("\n"); 431ac27a0ecSDave Kleikamp va_end(args); 432ac27a0ecSDave Kleikamp } 433ac27a0ecSDave Kleikamp 4345d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 4355d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 4365d1b1b3fSAneesh Kumar K.V __releases(bitlock) 4375d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 4385d1b1b3fSAneesh Kumar K.V { 4395d1b1b3fSAneesh Kumar K.V va_list args; 4405d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4415d1b1b3fSAneesh Kumar K.V 4425d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 4435d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 4445d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 4455d1b1b3fSAneesh Kumar K.V printk("\n"); 4465d1b1b3fSAneesh Kumar K.V va_end(args); 4475d1b1b3fSAneesh Kumar K.V 4485d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 4495d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4505d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4515d1b1b3fSAneesh Kumar K.V ext4_commit_super(sb, es, 0); 4525d1b1b3fSAneesh Kumar K.V return; 4535d1b1b3fSAneesh Kumar K.V } 4545d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 4555d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 4565d1b1b3fSAneesh Kumar K.V /* 4575d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 4585d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 4595d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 4605d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 4615d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 4625d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 4635d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 4645d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 4655d1b1b3fSAneesh Kumar K.V * more appropriate error code. 4665d1b1b3fSAneesh Kumar K.V */ 4675d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 4685d1b1b3fSAneesh Kumar K.V return; 4695d1b1b3fSAneesh Kumar K.V } 4705d1b1b3fSAneesh Kumar K.V 4715d1b1b3fSAneesh Kumar K.V 472617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 473ac27a0ecSDave Kleikamp { 474617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 475ac27a0ecSDave Kleikamp 476617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 477ac27a0ecSDave Kleikamp return; 478ac27a0ecSDave Kleikamp 47946e665e9SHarvey Harrison ext4_warning(sb, __func__, 480ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 481ac27a0ecSDave Kleikamp "running e2fsck is recommended", 482617ba13bSMingming Cao EXT4_DYNAMIC_REV); 483ac27a0ecSDave Kleikamp 484617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 485617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 486617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 487ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 488ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 489ac27a0ecSDave Kleikamp 490ac27a0ecSDave Kleikamp /* 491ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 492ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 493ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 494ac27a0ecSDave Kleikamp */ 495ac27a0ecSDave Kleikamp } 496ac27a0ecSDave Kleikamp 497ac27a0ecSDave Kleikamp /* 498ac27a0ecSDave Kleikamp * Open the external journal device 499ac27a0ecSDave Kleikamp */ 500617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 501ac27a0ecSDave Kleikamp { 502ac27a0ecSDave Kleikamp struct block_device *bdev; 503ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 504ac27a0ecSDave Kleikamp 505ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 506ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 507ac27a0ecSDave Kleikamp goto fail; 508ac27a0ecSDave Kleikamp return bdev; 509ac27a0ecSDave Kleikamp 510ac27a0ecSDave Kleikamp fail: 511abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: failed to open journal device %s: %ld\n", 512ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 513ac27a0ecSDave Kleikamp return NULL; 514ac27a0ecSDave Kleikamp } 515ac27a0ecSDave Kleikamp 516ac27a0ecSDave Kleikamp /* 517ac27a0ecSDave Kleikamp * Release the journal device 518ac27a0ecSDave Kleikamp */ 519617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 520ac27a0ecSDave Kleikamp { 521ac27a0ecSDave Kleikamp bd_release(bdev); 5229a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 523ac27a0ecSDave Kleikamp } 524ac27a0ecSDave Kleikamp 525617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 526ac27a0ecSDave Kleikamp { 527ac27a0ecSDave Kleikamp struct block_device *bdev; 528ac27a0ecSDave Kleikamp int ret = -ENODEV; 529ac27a0ecSDave Kleikamp 530ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 531ac27a0ecSDave Kleikamp if (bdev) { 532617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 533ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 534ac27a0ecSDave Kleikamp } 535ac27a0ecSDave Kleikamp return ret; 536ac27a0ecSDave Kleikamp } 537ac27a0ecSDave Kleikamp 538ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 539ac27a0ecSDave Kleikamp { 540617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 541ac27a0ecSDave Kleikamp } 542ac27a0ecSDave Kleikamp 543617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 544ac27a0ecSDave Kleikamp { 545ac27a0ecSDave Kleikamp struct list_head *l; 546ac27a0ecSDave Kleikamp 547ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 548ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 549ac27a0ecSDave Kleikamp 550ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 551ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 552ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 553ac27a0ecSDave Kleikamp printk(KERN_ERR " " 554ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 555ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 556ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 557ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 558ac27a0ecSDave Kleikamp } 559ac27a0ecSDave Kleikamp } 560ac27a0ecSDave Kleikamp 561617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 562ac27a0ecSDave Kleikamp { 563617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 564617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 565ef2cabf7SHidehiro Kawai int i, err; 566ac27a0ecSDave Kleikamp 567c9de560dSAlex Tomas ext4_mb_release(sb); 568a86c6181SAlex Tomas ext4_ext_release(sb); 569617ba13bSMingming Cao ext4_xattr_put_super(sb); 5700390131bSFrank Mayhar if (sbi->s_journal) { 571ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 57247b4a50bSJan Kara sbi->s_journal = NULL; 573ef2cabf7SHidehiro Kawai if (err < 0) 5740390131bSFrank Mayhar ext4_abort(sb, __func__, 5750390131bSFrank Mayhar "Couldn't clean up the journal"); 5760390131bSFrank Mayhar } 577ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 578617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 579ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 580617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 581ac27a0ecSDave Kleikamp } 582240799cdSTheodore Ts'o if (sbi->s_proc) { 5839f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 584240799cdSTheodore Ts'o } 5853197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 586ac27a0ecSDave Kleikamp 587ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 588ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 589ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 590c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 591c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 592c5ca7c76STheodore Ts'o else 593772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 594ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 595ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 596ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 5976bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 598ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 599ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 600ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 601ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 602ac27a0ecSDave Kleikamp #endif 603ac27a0ecSDave Kleikamp 604ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 605ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 606ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 607ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 608ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 609ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 610ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 611ac27a0ecSDave Kleikamp 612f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 613ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 614ac27a0ecSDave Kleikamp /* 615ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 616ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 617ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 618ac27a0ecSDave Kleikamp */ 619ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 620f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 621617ba13bSMingming Cao ext4_blkdev_remove(sbi); 622ac27a0ecSDave Kleikamp } 623ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 6243197ebdbSTheodore Ts'o /* 6253197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 6263197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 6273197ebdbSTheodore Ts'o */ 6283197ebdbSTheodore Ts'o unlock_kernel(); 6293197ebdbSTheodore Ts'o unlock_super(sb); 6303197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 6313197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 6323197ebdbSTheodore Ts'o lock_super(sb); 6333197ebdbSTheodore Ts'o lock_kernel(); 634705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 635ac27a0ecSDave Kleikamp kfree(sbi); 636ac27a0ecSDave Kleikamp return; 637ac27a0ecSDave Kleikamp } 638ac27a0ecSDave Kleikamp 639e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 640ac27a0ecSDave Kleikamp 641ac27a0ecSDave Kleikamp /* 642ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 643ac27a0ecSDave Kleikamp */ 644617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 645ac27a0ecSDave Kleikamp { 646617ba13bSMingming Cao struct ext4_inode_info *ei; 647ac27a0ecSDave Kleikamp 648e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 649ac27a0ecSDave Kleikamp if (!ei) 650ac27a0ecSDave Kleikamp return NULL; 65103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 652617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 653617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 654ac27a0ecSDave Kleikamp #endif 655ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 65691246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 657a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 658c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 659c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 6600390131bSFrank Mayhar /* 6610390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 6620390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 6630390131bSFrank Mayhar * jinode. 6640390131bSFrank Mayhar */ 665678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 666d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 667d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 668d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 669d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 670d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 671ac27a0ecSDave Kleikamp return &ei->vfs_inode; 672ac27a0ecSDave Kleikamp } 673ac27a0ecSDave Kleikamp 674617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 675ac27a0ecSDave Kleikamp { 6769f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 6779f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 6789f7dd93dSVasily Averin EXT4_I(inode)); 6799f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 6809f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 6819f7dd93dSVasily Averin true); 6829f7dd93dSVasily Averin dump_stack(); 6839f7dd93dSVasily Averin } 684617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 685ac27a0ecSDave Kleikamp } 686ac27a0ecSDave Kleikamp 68751cc5068SAlexey Dobriyan static void init_once(void *foo) 688ac27a0ecSDave Kleikamp { 689617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 690ac27a0ecSDave Kleikamp 691ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 69203010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 693ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 694ac27a0ecSDave Kleikamp #endif 6950e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 696ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 697ac27a0ecSDave Kleikamp } 698ac27a0ecSDave Kleikamp 699ac27a0ecSDave Kleikamp static int init_inodecache(void) 700ac27a0ecSDave Kleikamp { 701617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 702617ba13bSMingming Cao sizeof(struct ext4_inode_info), 703ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 704ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 70520c2df83SPaul Mundt init_once); 706617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 707ac27a0ecSDave Kleikamp return -ENOMEM; 708ac27a0ecSDave Kleikamp return 0; 709ac27a0ecSDave Kleikamp } 710ac27a0ecSDave Kleikamp 711ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 712ac27a0ecSDave Kleikamp { 713617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 714ac27a0ecSDave Kleikamp } 715ac27a0ecSDave Kleikamp 716617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 717ac27a0ecSDave Kleikamp { 71803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 719617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 720617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 721617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 722617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 723ac27a0ecSDave Kleikamp } 724617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 725617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 726617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 727617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 728ac27a0ecSDave Kleikamp } 729ac27a0ecSDave Kleikamp #endif 730c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 7310390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 732678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 733678aaf48SJan Kara &EXT4_I(inode)->jinode); 734ac27a0ecSDave Kleikamp } 735ac27a0ecSDave Kleikamp 7362b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 7372b2d6d01STheodore Ts'o struct super_block *sb) 738ac27a0ecSDave Kleikamp { 739ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 740617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 741ac27a0ecSDave Kleikamp 742ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 743ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 744ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); 745ac27a0ecSDave Kleikamp 746ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 747ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 748ac27a0ecSDave Kleikamp 749ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 750ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 751ac27a0ecSDave Kleikamp 752617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 753ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 754ac27a0ecSDave Kleikamp 755617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 756ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 757ac27a0ecSDave Kleikamp #endif 758ac27a0ecSDave Kleikamp } 759ac27a0ecSDave Kleikamp 760d9c9bef1SMiklos Szeredi /* 761d9c9bef1SMiklos Szeredi * Show an option if 762d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 763d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 764d9c9bef1SMiklos Szeredi */ 765617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 766ac27a0ecSDave Kleikamp { 767aa22df2cSAneesh Kumar K.V int def_errors; 768aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 769ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 770d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 771d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 772d9c9bef1SMiklos Szeredi 773d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 774aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 775d9c9bef1SMiklos Szeredi 776d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 777d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 778d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 779d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 780aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 781d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 782d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 783d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 784d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 785d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 786d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 787d9c9bef1SMiklos Szeredi } 788d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 789d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 790d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 791d9c9bef1SMiklos Szeredi } 792bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 793d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 794bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 795d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 796bb4f397aSAneesh Kumar K.V } 797bb4f397aSAneesh Kumar K.V } 798aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 799bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 800aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 801d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 802aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 803d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 804aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 805d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 806d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 807d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 80803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 809aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 810aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 811d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 812d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 813d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 814d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 815d9c9bef1SMiklos Szeredi } 816d9c9bef1SMiklos Szeredi #endif 81703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 818aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 819d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 820d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 821d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 822d9c9bef1SMiklos Szeredi #endif 82330773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 824d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 825d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 826d9c9bef1SMiklos Szeredi } 82730773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 82830773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 82930773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 83030773840STheodore Ts'o } 83130773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 83230773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 83330773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 83430773840STheodore Ts'o } 83530773840STheodore Ts'o 836571640caSEric Sandeen /* 837571640caSEric Sandeen * We're changing the default of barrier mount option, so 838571640caSEric Sandeen * let's always display its mount state so it's clear what its 839571640caSEric Sandeen * status is. 840571640caSEric Sandeen */ 841571640caSEric Sandeen seq_puts(seq, ",barrier="); 842571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 843cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 844cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 845d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 846d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 84725ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 84825ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 849dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 850dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 851dd919b98SAneesh Kumar K.V 852ac27a0ecSDave Kleikamp 853cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 854cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 855aa22df2cSAneesh Kumar K.V /* 856aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 857aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 858aa22df2cSAneesh Kumar K.V */ 859617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 860ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 861617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 862ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 863617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 864ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 865ac27a0ecSDave Kleikamp 866240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 867240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 868240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 869240799cdSTheodore Ts'o 8705bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 8715bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 8725bf5683aSHidehiro Kawai 873afd4672dSTheodore Ts'o if (test_opt(sb, NO_AUTO_DA_ALLOC)) 87406705bffSTheodore Ts'o seq_puts(seq, ",noauto_da_alloc"); 875afd4672dSTheodore Ts'o 876617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 877ac27a0ecSDave Kleikamp return 0; 878ac27a0ecSDave Kleikamp } 879ac27a0ecSDave Kleikamp 880ac27a0ecSDave Kleikamp 8811b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 8821b961ac0SChristoph Hellwig u64 ino, u32 generation) 883ac27a0ecSDave Kleikamp { 884ac27a0ecSDave Kleikamp struct inode *inode; 885ac27a0ecSDave Kleikamp 886617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 887ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 888617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 889ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 890ac27a0ecSDave Kleikamp 891ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 892ac27a0ecSDave Kleikamp * 893617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 894ac27a0ecSDave Kleikamp * deleted, so we should be safe. 895ac27a0ecSDave Kleikamp * 896ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 897ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 898ac27a0ecSDave Kleikamp */ 8991d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 9001d1fe1eeSDavid Howells if (IS_ERR(inode)) 9011d1fe1eeSDavid Howells return ERR_CAST(inode); 9021d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 903ac27a0ecSDave Kleikamp iput(inode); 904ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 905ac27a0ecSDave Kleikamp } 9061b961ac0SChristoph Hellwig 9071b961ac0SChristoph Hellwig return inode; 908ac27a0ecSDave Kleikamp } 9091b961ac0SChristoph Hellwig 9101b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 9111b961ac0SChristoph Hellwig int fh_len, int fh_type) 9121b961ac0SChristoph Hellwig { 9131b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 9141b961ac0SChristoph Hellwig ext4_nfs_get_inode); 9151b961ac0SChristoph Hellwig } 9161b961ac0SChristoph Hellwig 9171b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9181b961ac0SChristoph Hellwig int fh_len, int fh_type) 9191b961ac0SChristoph Hellwig { 9201b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 9211b961ac0SChristoph Hellwig ext4_nfs_get_inode); 922ac27a0ecSDave Kleikamp } 923ac27a0ecSDave Kleikamp 924c39a7f84SToshiyuki Okajima /* 925c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 926c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 927c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 928c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 929c39a7f84SToshiyuki Okajima */ 930c39a7f84SToshiyuki Okajima static int bdev_try_to_free_page(struct super_block *sb, struct page *page, gfp_t wait) 931c39a7f84SToshiyuki Okajima { 932c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 933c39a7f84SToshiyuki Okajima 934c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 935c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 936c39a7f84SToshiyuki Okajima return 0; 937c39a7f84SToshiyuki Okajima if (journal) 938c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 939c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 940c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 941c39a7f84SToshiyuki Okajima } 942c39a7f84SToshiyuki Okajima 943ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 944ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 945ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 946ac27a0ecSDave Kleikamp 947617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 948617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 949617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 950617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 951617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 9526f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 9536f28e087SJan Kara char *path, int remount); 954617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 955617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 956ac27a0ecSDave Kleikamp size_t len, loff_t off); 957617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 958ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 959ac27a0ecSDave Kleikamp 960617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 961edf72453SJan Kara .initialize = dquot_initialize, 962edf72453SJan Kara .drop = dquot_drop, 963ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 96460e58e0fSMingming Cao .reserve_space = dquot_reserve_space, 96560e58e0fSMingming Cao .claim_space = dquot_claim_space, 96660e58e0fSMingming Cao .release_rsv = dquot_release_reserved_space, 96760e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 968ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 969ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 970ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 971ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 972617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 973617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 974617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 975617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 976a5b5ee32SJan Kara .write_info = ext4_write_info, 977a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 978a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 979ac27a0ecSDave Kleikamp }; 980ac27a0ecSDave Kleikamp 981617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 982617ba13bSMingming Cao .quota_on = ext4_quota_on, 983ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 984ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 985ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 986ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 987ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 988ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 989ac27a0ecSDave Kleikamp }; 990ac27a0ecSDave Kleikamp #endif 991ac27a0ecSDave Kleikamp 992ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 993617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 994617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 995617ba13bSMingming Cao .write_inode = ext4_write_inode, 996617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 997617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 998617ba13bSMingming Cao .put_super = ext4_put_super, 999617ba13bSMingming Cao .write_super = ext4_write_super, 1000617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1001c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1002c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1003617ba13bSMingming Cao .statfs = ext4_statfs, 1004617ba13bSMingming Cao .remount_fs = ext4_remount, 1005617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 1006617ba13bSMingming Cao .show_options = ext4_show_options, 1007ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1008617ba13bSMingming Cao .quota_read = ext4_quota_read, 1009617ba13bSMingming Cao .quota_write = ext4_quota_write, 1010ac27a0ecSDave Kleikamp #endif 1011c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1012ac27a0ecSDave Kleikamp }; 1013ac27a0ecSDave Kleikamp 101439655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 10151b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 10161b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1017617ba13bSMingming Cao .get_parent = ext4_get_parent, 1018ac27a0ecSDave Kleikamp }; 1019ac27a0ecSDave Kleikamp 1020ac27a0ecSDave Kleikamp enum { 1021ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1022ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 102301436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1024ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 102506705bffSTheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, 102630773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1027c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1028818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1029ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 10305bf5683aSHidehiro Kawai Opt_data_err_abort, Opt_data_err_ignore, 1031ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 1032ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 103306705bffSTheodore Ts'o Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, 103406705bffSTheodore Ts'o Opt_usrquota, Opt_grpquota, Opt_i_version, 103501436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 1036b3881f74STheodore Ts'o Opt_inode_readahead_blks, Opt_journal_ioprio 1037ac27a0ecSDave Kleikamp }; 1038ac27a0ecSDave Kleikamp 1039a447c093SSteven Whitehouse static const match_table_t tokens = { 1040ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1041ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1042ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1043ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1044ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1045ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1046ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1047ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1048ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1049ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1050ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1051ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1052ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1053ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1054ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1055ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1056ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1057ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1058ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1059ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1060ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1061ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1062ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1063ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 106430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 106530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1066ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1067ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1068818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1069818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1070ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1071ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1072ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1073ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 10745bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 10755bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1076ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1077ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1078ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1079ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1080ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1081ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 1082ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1083ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1084ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1085ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1086ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 108706705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 108806705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 108925ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1090c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1091ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 109264769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1093dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 1094240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1095b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1096afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 109706705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 109806705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1099f3f12faaSJosef Bacik {Opt_err, NULL}, 1100ac27a0ecSDave Kleikamp }; 1101ac27a0ecSDave Kleikamp 1102617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1103ac27a0ecSDave Kleikamp { 1104617ba13bSMingming Cao ext4_fsblk_t sb_block; 1105ac27a0ecSDave Kleikamp char *options = (char *) *data; 1106ac27a0ecSDave Kleikamp 1107ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1108ac27a0ecSDave Kleikamp return 1; /* Default location */ 1109ac27a0ecSDave Kleikamp options += 3; 1110617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 1111ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1112ac27a0ecSDave Kleikamp if (*options && *options != ',') { 11134776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1114ac27a0ecSDave Kleikamp (char *) *data); 1115ac27a0ecSDave Kleikamp return 1; 1116ac27a0ecSDave Kleikamp } 1117ac27a0ecSDave Kleikamp if (*options == ',') 1118ac27a0ecSDave Kleikamp options++; 1119ac27a0ecSDave Kleikamp *data = (void *) options; 1120ac27a0ecSDave Kleikamp return sb_block; 1121ac27a0ecSDave Kleikamp } 1122ac27a0ecSDave Kleikamp 1123b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1124b3881f74STheodore Ts'o 1125ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1126c3191067STheodore Ts'o unsigned long *journal_devnum, 1127b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1128617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1129ac27a0ecSDave Kleikamp { 1130617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1131ac27a0ecSDave Kleikamp char *p; 1132ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1133ac27a0ecSDave Kleikamp int data_opt = 0; 1134ac27a0ecSDave Kleikamp int option; 1135ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1136dfc5d03fSJan Kara int qtype, qfmt; 1137ac27a0ecSDave Kleikamp char *qname; 1138ac27a0ecSDave Kleikamp #endif 1139ac27a0ecSDave Kleikamp 1140ac27a0ecSDave Kleikamp if (!options) 1141ac27a0ecSDave Kleikamp return 1; 1142ac27a0ecSDave Kleikamp 1143ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1144ac27a0ecSDave Kleikamp int token; 1145ac27a0ecSDave Kleikamp if (!*p) 1146ac27a0ecSDave Kleikamp continue; 1147ac27a0ecSDave Kleikamp 1148ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1149ac27a0ecSDave Kleikamp switch (token) { 1150ac27a0ecSDave Kleikamp case Opt_bsd_df: 1151ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1152ac27a0ecSDave Kleikamp break; 1153ac27a0ecSDave Kleikamp case Opt_minix_df: 1154ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1155ac27a0ecSDave Kleikamp break; 1156ac27a0ecSDave Kleikamp case Opt_grpid: 1157ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1158ac27a0ecSDave Kleikamp break; 1159ac27a0ecSDave Kleikamp case Opt_nogrpid: 1160ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1161ac27a0ecSDave Kleikamp break; 1162ac27a0ecSDave Kleikamp case Opt_resuid: 1163ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1164ac27a0ecSDave Kleikamp return 0; 1165ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1166ac27a0ecSDave Kleikamp break; 1167ac27a0ecSDave Kleikamp case Opt_resgid: 1168ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1169ac27a0ecSDave Kleikamp return 0; 1170ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1171ac27a0ecSDave Kleikamp break; 1172ac27a0ecSDave Kleikamp case Opt_sb: 1173ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1174ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1175ac27a0ecSDave Kleikamp break; 1176ac27a0ecSDave Kleikamp case Opt_err_panic: 1177ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1178ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1179ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1180ac27a0ecSDave Kleikamp break; 1181ac27a0ecSDave Kleikamp case Opt_err_ro: 1182ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1183ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1184ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1185ac27a0ecSDave Kleikamp break; 1186ac27a0ecSDave Kleikamp case Opt_err_cont: 1187ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1188ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1189ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1190ac27a0ecSDave Kleikamp break; 1191ac27a0ecSDave Kleikamp case Opt_nouid32: 1192ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1193ac27a0ecSDave Kleikamp break; 1194ac27a0ecSDave Kleikamp case Opt_debug: 1195ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1196ac27a0ecSDave Kleikamp break; 1197ac27a0ecSDave Kleikamp case Opt_oldalloc: 1198ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1199ac27a0ecSDave Kleikamp break; 1200ac27a0ecSDave Kleikamp case Opt_orlov: 1201ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1202ac27a0ecSDave Kleikamp break; 120303010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1204ac27a0ecSDave Kleikamp case Opt_user_xattr: 1205ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1206ac27a0ecSDave Kleikamp break; 1207ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1208ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1209ac27a0ecSDave Kleikamp break; 1210ac27a0ecSDave Kleikamp #else 1211ac27a0ecSDave Kleikamp case Opt_user_xattr: 1212ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 12134776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)user_xattr options " 12144776004fSTheodore Ts'o "not supported\n"); 1215ac27a0ecSDave Kleikamp break; 1216ac27a0ecSDave Kleikamp #endif 121703010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1218ac27a0ecSDave Kleikamp case Opt_acl: 1219ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1220ac27a0ecSDave Kleikamp break; 1221ac27a0ecSDave Kleikamp case Opt_noacl: 1222ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1223ac27a0ecSDave Kleikamp break; 1224ac27a0ecSDave Kleikamp #else 1225ac27a0ecSDave Kleikamp case Opt_acl: 1226ac27a0ecSDave Kleikamp case Opt_noacl: 12274776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)acl options " 12284776004fSTheodore Ts'o "not supported\n"); 1229ac27a0ecSDave Kleikamp break; 1230ac27a0ecSDave Kleikamp #endif 1231ac27a0ecSDave Kleikamp case Opt_journal_update: 1232ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1233ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1234ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1235ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1236ac27a0ecSDave Kleikamp journal file. */ 1237ac27a0ecSDave Kleikamp if (is_remount) { 1238617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1239ac27a0ecSDave Kleikamp "journal on remount\n"); 1240ac27a0ecSDave Kleikamp return 0; 1241ac27a0ecSDave Kleikamp } 1242ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1243ac27a0ecSDave Kleikamp break; 1244ac27a0ecSDave Kleikamp case Opt_journal_dev: 1245ac27a0ecSDave Kleikamp if (is_remount) { 1246617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1247ac27a0ecSDave Kleikamp "journal on remount\n"); 1248ac27a0ecSDave Kleikamp return 0; 1249ac27a0ecSDave Kleikamp } 1250ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1251ac27a0ecSDave Kleikamp return 0; 1252ac27a0ecSDave Kleikamp *journal_devnum = option; 1253ac27a0ecSDave Kleikamp break; 1254818d276cSGirish Shilamkar case Opt_journal_checksum: 1255818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1256818d276cSGirish Shilamkar break; 1257818d276cSGirish Shilamkar case Opt_journal_async_commit: 1258818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1259818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1260818d276cSGirish Shilamkar break; 1261ac27a0ecSDave Kleikamp case Opt_noload: 1262ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1263ac27a0ecSDave Kleikamp break; 1264ac27a0ecSDave Kleikamp case Opt_commit: 1265ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1266ac27a0ecSDave Kleikamp return 0; 1267ac27a0ecSDave Kleikamp if (option < 0) 1268ac27a0ecSDave Kleikamp return 0; 1269ac27a0ecSDave Kleikamp if (option == 0) 1270cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1271ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1272ac27a0ecSDave Kleikamp break; 127330773840STheodore Ts'o case Opt_max_batch_time: 127430773840STheodore Ts'o if (match_int(&args[0], &option)) 127530773840STheodore Ts'o return 0; 127630773840STheodore Ts'o if (option < 0) 127730773840STheodore Ts'o return 0; 127830773840STheodore Ts'o if (option == 0) 127930773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 128030773840STheodore Ts'o sbi->s_max_batch_time = option; 128130773840STheodore Ts'o break; 128230773840STheodore Ts'o case Opt_min_batch_time: 128330773840STheodore Ts'o if (match_int(&args[0], &option)) 128430773840STheodore Ts'o return 0; 128530773840STheodore Ts'o if (option < 0) 128630773840STheodore Ts'o return 0; 128730773840STheodore Ts'o sbi->s_min_batch_time = option; 128830773840STheodore Ts'o break; 1289ac27a0ecSDave Kleikamp case Opt_data_journal: 1290617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1291ac27a0ecSDave Kleikamp goto datacheck; 1292ac27a0ecSDave Kleikamp case Opt_data_ordered: 1293617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1294ac27a0ecSDave Kleikamp goto datacheck; 1295ac27a0ecSDave Kleikamp case Opt_data_writeback: 1296617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1297ac27a0ecSDave Kleikamp datacheck: 1298ac27a0ecSDave Kleikamp if (is_remount) { 1299617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1300ac27a0ecSDave Kleikamp != data_opt) { 1301ac27a0ecSDave Kleikamp printk(KERN_ERR 1302617ba13bSMingming Cao "EXT4-fs: cannot change data " 1303ac27a0ecSDave Kleikamp "mode on remount\n"); 1304ac27a0ecSDave Kleikamp return 0; 1305ac27a0ecSDave Kleikamp } 1306ac27a0ecSDave Kleikamp } else { 1307617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1308ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1309ac27a0ecSDave Kleikamp } 1310ac27a0ecSDave Kleikamp break; 13115bf5683aSHidehiro Kawai case Opt_data_err_abort: 13125bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13135bf5683aSHidehiro Kawai break; 13145bf5683aSHidehiro Kawai case Opt_data_err_ignore: 13155bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 13165bf5683aSHidehiro Kawai break; 1317ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1318ac27a0ecSDave Kleikamp case Opt_usrjquota: 1319ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1320ac27a0ecSDave Kleikamp goto set_qf_name; 1321ac27a0ecSDave Kleikamp case Opt_grpjquota: 1322ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1323ac27a0ecSDave Kleikamp set_qf_name: 132417bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1325dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1326ac27a0ecSDave Kleikamp printk(KERN_ERR 13272c8be6b2SJan Kara "EXT4-fs: Cannot change journaled " 1328ac27a0ecSDave Kleikamp "quota options when quota turned on.\n"); 1329ac27a0ecSDave Kleikamp return 0; 1330ac27a0ecSDave Kleikamp } 1331ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1332ac27a0ecSDave Kleikamp if (!qname) { 1333ac27a0ecSDave Kleikamp printk(KERN_ERR 1334617ba13bSMingming Cao "EXT4-fs: not enough memory for " 1335ac27a0ecSDave Kleikamp "storing quotafile name.\n"); 1336ac27a0ecSDave Kleikamp return 0; 1337ac27a0ecSDave Kleikamp } 1338ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1339ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1340ac27a0ecSDave Kleikamp printk(KERN_ERR 1341617ba13bSMingming Cao "EXT4-fs: %s quota file already " 1342ac27a0ecSDave Kleikamp "specified.\n", QTYPE2NAME(qtype)); 1343ac27a0ecSDave Kleikamp kfree(qname); 1344ac27a0ecSDave Kleikamp return 0; 1345ac27a0ecSDave Kleikamp } 1346ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1347ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1348ac27a0ecSDave Kleikamp printk(KERN_ERR 1349617ba13bSMingming Cao "EXT4-fs: quotafile must be on " 1350ac27a0ecSDave Kleikamp "filesystem root.\n"); 1351ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1352ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1353ac27a0ecSDave Kleikamp return 0; 1354ac27a0ecSDave Kleikamp } 1355ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1356ac27a0ecSDave Kleikamp break; 1357ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1358ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1359ac27a0ecSDave Kleikamp goto clear_qf_name; 1360ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1361ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1362ac27a0ecSDave Kleikamp clear_qf_name: 136317bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1364dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1365617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 13662c8be6b2SJan Kara "journaled quota options when " 1367ac27a0ecSDave Kleikamp "quota turned on.\n"); 1368ac27a0ecSDave Kleikamp return 0; 1369ac27a0ecSDave Kleikamp } 1370ac27a0ecSDave Kleikamp /* 1371ac27a0ecSDave Kleikamp * The space will be released later when all options 1372ac27a0ecSDave Kleikamp * are confirmed to be correct 1373ac27a0ecSDave Kleikamp */ 1374ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1375ac27a0ecSDave Kleikamp break; 1376ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1377dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1378dfc5d03fSJan Kara goto set_qf_format; 1379ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1380dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1381dfc5d03fSJan Kara set_qf_format: 138217bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1383dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1384dfc5d03fSJan Kara printk(KERN_ERR "EXT4-fs: Cannot change " 1385dfc5d03fSJan Kara "journaled quota options when " 1386dfc5d03fSJan Kara "quota turned on.\n"); 1387dfc5d03fSJan Kara return 0; 1388dfc5d03fSJan Kara } 1389dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1390ac27a0ecSDave Kleikamp break; 1391ac27a0ecSDave Kleikamp case Opt_quota: 1392ac27a0ecSDave Kleikamp case Opt_usrquota: 1393ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1394ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1395ac27a0ecSDave Kleikamp break; 1396ac27a0ecSDave Kleikamp case Opt_grpquota: 1397ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1398ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1399ac27a0ecSDave Kleikamp break; 1400ac27a0ecSDave Kleikamp case Opt_noquota: 140117bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1402617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1403ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1404ac27a0ecSDave Kleikamp return 0; 1405ac27a0ecSDave Kleikamp } 1406ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1407ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1408ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1409ac27a0ecSDave Kleikamp break; 1410ac27a0ecSDave Kleikamp #else 1411ac27a0ecSDave Kleikamp case Opt_quota: 1412ac27a0ecSDave Kleikamp case Opt_usrquota: 1413ac27a0ecSDave Kleikamp case Opt_grpquota: 1414cd59e7b9SJan Kara printk(KERN_ERR 1415cd59e7b9SJan Kara "EXT4-fs: quota options not supported.\n"); 1416cd59e7b9SJan Kara break; 1417ac27a0ecSDave Kleikamp case Opt_usrjquota: 1418ac27a0ecSDave Kleikamp case Opt_grpjquota: 1419ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1420ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1421ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1422ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1423ac27a0ecSDave Kleikamp printk(KERN_ERR 1424cd59e7b9SJan Kara "EXT4-fs: journaled quota options not " 1425ac27a0ecSDave Kleikamp "supported.\n"); 1426ac27a0ecSDave Kleikamp break; 1427ac27a0ecSDave Kleikamp case Opt_noquota: 1428ac27a0ecSDave Kleikamp break; 1429ac27a0ecSDave Kleikamp #endif 1430ac27a0ecSDave Kleikamp case Opt_abort: 1431ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1432ac27a0ecSDave Kleikamp break; 143306705bffSTheodore Ts'o case Opt_nobarrier: 143406705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, BARRIER); 143506705bffSTheodore Ts'o break; 1436ac27a0ecSDave Kleikamp case Opt_barrier: 143706705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 143806705bffSTheodore Ts'o set_opt(sbi->s_mount_opt, BARRIER); 143906705bffSTheodore Ts'o break; 144006705bffSTheodore Ts'o } 1441ac27a0ecSDave Kleikamp if (option) 1442ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1443ac27a0ecSDave Kleikamp else 1444ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1445ac27a0ecSDave Kleikamp break; 1446ac27a0ecSDave Kleikamp case Opt_ignore: 1447ac27a0ecSDave Kleikamp break; 1448ac27a0ecSDave Kleikamp case Opt_resize: 1449ac27a0ecSDave Kleikamp if (!is_remount) { 1450617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1451ac27a0ecSDave Kleikamp "for remount\n"); 1452ac27a0ecSDave Kleikamp return 0; 1453ac27a0ecSDave Kleikamp } 1454ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1455ac27a0ecSDave Kleikamp return 0; 1456ac27a0ecSDave Kleikamp *n_blocks_count = option; 1457ac27a0ecSDave Kleikamp break; 1458ac27a0ecSDave Kleikamp case Opt_nobh: 1459ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1460ac27a0ecSDave Kleikamp break; 1461ac27a0ecSDave Kleikamp case Opt_bh: 1462ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1463ac27a0ecSDave Kleikamp break; 146425ec56b5SJean Noel Cordenner case Opt_i_version: 146525ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 146625ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 146725ec56b5SJean Noel Cordenner break; 1468dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1469dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1470dd919b98SAneesh Kumar K.V break; 1471c9de560dSAlex Tomas case Opt_stripe: 1472c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1473c9de560dSAlex Tomas return 0; 1474c9de560dSAlex Tomas if (option < 0) 1475c9de560dSAlex Tomas return 0; 1476c9de560dSAlex Tomas sbi->s_stripe = option; 1477c9de560dSAlex Tomas break; 147864769240SAlex Tomas case Opt_delalloc: 147964769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 148064769240SAlex Tomas break; 1481240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1482240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1483240799cdSTheodore Ts'o return 0; 1484240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1485240799cdSTheodore Ts'o return 0; 1486*f7c43950STheodore Ts'o if (!is_power_of_2(option)) { 14873197ebdbSTheodore Ts'o printk(KERN_ERR "EXT4-fs: inode_readahead_blks" 14883197ebdbSTheodore Ts'o " must be a power of 2\n"); 14893197ebdbSTheodore Ts'o return 0; 14903197ebdbSTheodore Ts'o } 1491240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1492240799cdSTheodore Ts'o break; 1493b3881f74STheodore Ts'o case Opt_journal_ioprio: 1494b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1495b3881f74STheodore Ts'o return 0; 1496b3881f74STheodore Ts'o if (option < 0 || option > 7) 1497b3881f74STheodore Ts'o break; 1498b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1499b3881f74STheodore Ts'o option); 1500b3881f74STheodore Ts'o break; 150106705bffSTheodore Ts'o case Opt_noauto_da_alloc: 150206705bffSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 150306705bffSTheodore Ts'o break; 1504afd4672dSTheodore Ts'o case Opt_auto_da_alloc: 150506705bffSTheodore Ts'o if (match_int(&args[0], &option)) { 150606705bffSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 150706705bffSTheodore Ts'o break; 150806705bffSTheodore Ts'o } 1509afd4672dSTheodore Ts'o if (option) 1510afd4672dSTheodore Ts'o clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); 1511afd4672dSTheodore Ts'o else 1512afd4672dSTheodore Ts'o set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); 1513afd4672dSTheodore Ts'o break; 1514ac27a0ecSDave Kleikamp default: 1515ac27a0ecSDave Kleikamp printk(KERN_ERR 1516617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1517ac27a0ecSDave Kleikamp "or missing value\n", p); 1518ac27a0ecSDave Kleikamp return 0; 1519ac27a0ecSDave Kleikamp } 1520ac27a0ecSDave Kleikamp } 1521ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1522ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1523617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1524ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1525ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1526ac27a0ecSDave Kleikamp 1527617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1528ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1529ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1530ac27a0ecSDave Kleikamp 1531ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1532617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1533ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1534617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1535617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1536ac27a0ecSDave Kleikamp "format mixing.\n"); 1537ac27a0ecSDave Kleikamp return 0; 1538ac27a0ecSDave Kleikamp } 1539ac27a0ecSDave Kleikamp 1540ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 15412c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 1542ac27a0ecSDave Kleikamp "not specified.\n"); 1543ac27a0ecSDave Kleikamp return 0; 1544ac27a0ecSDave Kleikamp } 1545ac27a0ecSDave Kleikamp } else { 1546ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 15472c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 15482c8be6b2SJan Kara "specified with no journaling " 1549ac27a0ecSDave Kleikamp "enabled.\n"); 1550ac27a0ecSDave Kleikamp return 0; 1551ac27a0ecSDave Kleikamp } 1552ac27a0ecSDave Kleikamp } 1553ac27a0ecSDave Kleikamp #endif 1554ac27a0ecSDave Kleikamp return 1; 1555ac27a0ecSDave Kleikamp } 1556ac27a0ecSDave Kleikamp 1557617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1558ac27a0ecSDave Kleikamp int read_only) 1559ac27a0ecSDave Kleikamp { 1560617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1561ac27a0ecSDave Kleikamp int res = 0; 1562ac27a0ecSDave Kleikamp 1563617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1564617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs warning: revision level too high, " 1565ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1566ac27a0ecSDave Kleikamp res = MS_RDONLY; 1567ac27a0ecSDave Kleikamp } 1568ac27a0ecSDave Kleikamp if (read_only) 1569ac27a0ecSDave Kleikamp return res; 1570617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1571617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1572ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1573617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1574ac27a0ecSDave Kleikamp printk(KERN_WARNING 1575617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1576ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1577ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1578ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1579ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1580ac27a0ecSDave Kleikamp printk(KERN_WARNING 1581617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1582ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1583ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1584ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1585ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1586ac27a0ecSDave Kleikamp printk(KERN_WARNING 1587617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1588ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 15890390131bSFrank Mayhar if (!sbi->s_journal) 1590216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1591ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1592617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1593e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1594ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1595617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 15960390131bSFrank Mayhar if (sbi->s_journal) 1597617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1598ac27a0ecSDave Kleikamp 1599617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1600ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1601a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1602ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1603ac27a0ecSDave Kleikamp sb->s_blocksize, 1604ac27a0ecSDave Kleikamp sbi->s_groups_count, 1605617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1606617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1607ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1608ac27a0ecSDave Kleikamp 16090390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 161005496769STheodore Ts'o printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", 161105496769STheodore Ts'o sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : 161205496769STheodore Ts'o "external", EXT4_SB(sb)->s_journal->j_devname); 16130390131bSFrank Mayhar } else { 16140390131bSFrank Mayhar printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); 16150390131bSFrank Mayhar } 1616ac27a0ecSDave Kleikamp return res; 1617ac27a0ecSDave Kleikamp } 1618ac27a0ecSDave Kleikamp 1619772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1620772cb7c8SJose R. Santos { 1621772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1622772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1623772cb7c8SJose R. Santos struct buffer_head *bh; 1624772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1625772cb7c8SJose R. Santos ext4_group_t flex_group; 1626772cb7c8SJose R. Santos int groups_per_flex = 0; 1627c5ca7c76STheodore Ts'o size_t size; 1628772cb7c8SJose R. Santos int i; 1629772cb7c8SJose R. Santos 1630772cb7c8SJose R. Santos if (!sbi->s_es->s_log_groups_per_flex) { 1631772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1632772cb7c8SJose R. Santos return 1; 1633772cb7c8SJose R. Santos } 1634772cb7c8SJose R. Santos 1635772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1636772cb7c8SJose R. Santos groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1637772cb7c8SJose R. Santos 1638c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1639c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1640d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1641d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1642c5ca7c76STheodore Ts'o size = flex_group_count * sizeof(struct flex_groups); 1643c5ca7c76STheodore Ts'o sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); 1644c5ca7c76STheodore Ts'o if (sbi->s_flex_groups == NULL) { 1645c5ca7c76STheodore Ts'o sbi->s_flex_groups = vmalloc(size); 1646c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) 1647c5ca7c76STheodore Ts'o memset(sbi->s_flex_groups, 0, size); 1648c5ca7c76STheodore Ts'o } 1649772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1650ec05e868SLi Zefan printk(KERN_ERR "EXT4-fs: not enough memory for " 1651a9df9a49STheodore Ts'o "%u flex groups\n", flex_group_count); 1652772cb7c8SJose R. Santos goto failed; 1653772cb7c8SJose R. Santos } 1654772cb7c8SJose R. Santos 1655772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 1656772cb7c8SJose R. Santos gdp = ext4_get_group_desc(sb, i, &bh); 1657772cb7c8SJose R. Santos 1658772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 16599f24e420STheodore Ts'o atomic_set(&sbi->s_flex_groups[flex_group].free_inodes, 16609f24e420STheodore Ts'o ext4_free_inodes_count(sb, gdp)); 16619f24e420STheodore Ts'o atomic_set(&sbi->s_flex_groups[flex_group].free_blocks, 16629f24e420STheodore Ts'o ext4_free_blks_count(sb, gdp)); 16637d39db14STheodore Ts'o atomic_set(&sbi->s_flex_groups[flex_group].used_dirs, 16647d39db14STheodore Ts'o ext4_used_dirs_count(sb, gdp)); 1665772cb7c8SJose R. Santos } 1666772cb7c8SJose R. Santos 1667772cb7c8SJose R. Santos return 1; 1668772cb7c8SJose R. Santos failed: 1669772cb7c8SJose R. Santos return 0; 1670772cb7c8SJose R. Santos } 1671772cb7c8SJose R. Santos 1672717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1673717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1674717d50e4SAndreas Dilger { 1675717d50e4SAndreas Dilger __u16 crc = 0; 1676717d50e4SAndreas Dilger 1677717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1678717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1679717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1680717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1681717d50e4SAndreas Dilger 1682717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1683717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1684717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1685717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1686717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1687717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1688717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1689717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1690717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1691717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1692717d50e4SAndreas Dilger offset); 1693717d50e4SAndreas Dilger } 1694717d50e4SAndreas Dilger 1695717d50e4SAndreas Dilger return cpu_to_le16(crc); 1696717d50e4SAndreas Dilger } 1697717d50e4SAndreas Dilger 1698717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1699717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1700717d50e4SAndreas Dilger { 1701717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1702717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1703717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1704717d50e4SAndreas Dilger return 0; 1705717d50e4SAndreas Dilger 1706717d50e4SAndreas Dilger return 1; 1707717d50e4SAndreas Dilger } 1708717d50e4SAndreas Dilger 1709ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1710617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1711ac27a0ecSDave Kleikamp { 1712617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1713617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1714617ba13bSMingming Cao ext4_fsblk_t last_block; 1715bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1716bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1717bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1718ce421581SJose R. Santos int flexbg_flag = 0; 1719fd2d4291SAvantika Mathur ext4_group_t i; 1720ac27a0ecSDave Kleikamp 1721ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1722ce421581SJose R. Santos flexbg_flag = 1; 1723ce421581SJose R. Santos 1724617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1725ac27a0ecSDave Kleikamp 1726197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1727197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1728197cd65aSAkinobu Mita 1729ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1730bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1731ac27a0ecSDave Kleikamp else 1732ac27a0ecSDave Kleikamp last_block = first_block + 1733617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1734ac27a0ecSDave Kleikamp 17358fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 17362b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1737c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1738a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 17395128273aSEric Sesterhenn "(block %llu)!\n", i, block_bitmap); 1740ac27a0ecSDave Kleikamp return 0; 1741ac27a0ecSDave Kleikamp } 17428fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 17432b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1744c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1745a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 17465128273aSEric Sesterhenn "(block %llu)!\n", i, inode_bitmap); 1747ac27a0ecSDave Kleikamp return 0; 1748ac27a0ecSDave Kleikamp } 17498fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1750bd81d8eeSLaurent Vivier if (inode_table < first_block || 17512b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1752c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1753a9df9a49STheodore Ts'o "Inode table for group %u not in group " 17545128273aSEric Sesterhenn "(block %llu)!\n", i, inode_table); 1755ac27a0ecSDave Kleikamp return 0; 1756ac27a0ecSDave Kleikamp } 1757b5f10eedSEric Sandeen spin_lock(sb_bgl_lock(sbi, i)); 1758717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1759c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1760a9df9a49STheodore Ts'o "Checksum for group %u failed (%u!=%u)\n", 1761fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1762fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 17637ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 17647ee1ec4cSLi Zefan spin_unlock(sb_bgl_lock(sbi, i)); 1765717d50e4SAndreas Dilger return 0; 1766717d50e4SAndreas Dilger } 17677ee1ec4cSLi Zefan } 1768b5f10eedSEric Sandeen spin_unlock(sb_bgl_lock(sbi, i)); 1769ce421581SJose R. Santos if (!flexbg_flag) 1770617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1771ac27a0ecSDave Kleikamp } 1772ac27a0ecSDave Kleikamp 1773bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1774617ba13bSMingming Cao sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 1775ac27a0ecSDave Kleikamp return 1; 1776ac27a0ecSDave Kleikamp } 1777ac27a0ecSDave Kleikamp 1778617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1779ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1780ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1781ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1782ac27a0ecSDave Kleikamp * 1783ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1784ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1785ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1786ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1787ac27a0ecSDave Kleikamp * 1788ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1789ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1790ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1791617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1792ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1793ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1794ac27a0ecSDave Kleikamp */ 1795617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1796617ba13bSMingming Cao struct ext4_super_block *es) 1797ac27a0ecSDave Kleikamp { 1798ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1799ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1800ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1801ac27a0ecSDave Kleikamp int i; 1802ac27a0ecSDave Kleikamp #endif 1803ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1804ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1805ac27a0ecSDave Kleikamp return; 1806ac27a0ecSDave Kleikamp } 1807ac27a0ecSDave Kleikamp 1808a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1809a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1810a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1811a8f48a95SEric Sandeen return; 1812a8f48a95SEric Sandeen } 1813a8f48a95SEric Sandeen 1814617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1815ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1816ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1817ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1818ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1819ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1820ac27a0ecSDave Kleikamp return; 1821ac27a0ecSDave Kleikamp } 1822ac27a0ecSDave Kleikamp 1823ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1824617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1825ac27a0ecSDave Kleikamp sb->s_id); 1826ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1827ac27a0ecSDave Kleikamp } 1828ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1829ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1830ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1831ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1832ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1833617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1834617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1835ac27a0ecSDave Kleikamp if (ret < 0) 1836ac27a0ecSDave Kleikamp printk(KERN_ERR 18372c8be6b2SJan Kara "EXT4-fs: Cannot turn on journaled " 1838ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1839ac27a0ecSDave Kleikamp } 1840ac27a0ecSDave Kleikamp } 1841ac27a0ecSDave Kleikamp #endif 1842ac27a0ecSDave Kleikamp 1843ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1844ac27a0ecSDave Kleikamp struct inode *inode; 1845ac27a0ecSDave Kleikamp 184697bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 184797bd42b9SJosef Bacik if (IS_ERR(inode)) { 1848ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1849ac27a0ecSDave Kleikamp break; 1850ac27a0ecSDave Kleikamp } 1851ac27a0ecSDave Kleikamp 1852617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1853a269eb18SJan Kara vfs_dq_init(inode); 1854ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1855ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1856e5f8eab8STheodore Ts'o "%s: truncating inode %lu to %lld bytes\n", 185746e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1858e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1859ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1860617ba13bSMingming Cao ext4_truncate(inode); 1861ac27a0ecSDave Kleikamp nr_truncates++; 1862ac27a0ecSDave Kleikamp } else { 1863ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1864ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 186546e665e9SHarvey Harrison __func__, inode->i_ino); 1866ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1867ac27a0ecSDave Kleikamp inode->i_ino); 1868ac27a0ecSDave Kleikamp nr_orphans++; 1869ac27a0ecSDave Kleikamp } 1870ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1871ac27a0ecSDave Kleikamp } 1872ac27a0ecSDave Kleikamp 1873ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 1874ac27a0ecSDave Kleikamp 1875ac27a0ecSDave Kleikamp if (nr_orphans) 1876617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1877ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1878ac27a0ecSDave Kleikamp if (nr_truncates) 1879617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1880ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1881ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1882ac27a0ecSDave Kleikamp /* Turn quotas off */ 1883ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1884ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 18856f28e087SJan Kara vfs_quota_off(sb, i, 0); 1886ac27a0ecSDave Kleikamp } 1887ac27a0ecSDave Kleikamp #endif 1888ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1889ac27a0ecSDave Kleikamp } 1890cd2291a4SEric Sandeen /* 1891cd2291a4SEric Sandeen * Maximal extent format file size. 1892cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1893cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1894cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1895cd2291a4SEric Sandeen * so that won't be a limiting factor. 1896cd2291a4SEric Sandeen * 1897cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1898cd2291a4SEric Sandeen */ 1899f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 1900cd2291a4SEric Sandeen { 1901cd2291a4SEric Sandeen loff_t res; 1902cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1903cd2291a4SEric Sandeen 1904cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1905f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 1906cd2291a4SEric Sandeen /* 1907b3a6ffe1SJens Axboe * CONFIG_LBD is not enabled implies the inode 1908cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1909cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1910cd2291a4SEric Sandeen */ 1911cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1912cd2291a4SEric Sandeen 1913cd2291a4SEric Sandeen /* total blocks in file system block size */ 1914cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1915cd2291a4SEric Sandeen upper_limit <<= blkbits; 1916cd2291a4SEric Sandeen } 1917cd2291a4SEric Sandeen 1918cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1919cd2291a4SEric Sandeen res = 1LL << 32; 1920cd2291a4SEric Sandeen res <<= blkbits; 1921cd2291a4SEric Sandeen res -= 1; 1922cd2291a4SEric Sandeen 1923cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1924cd2291a4SEric Sandeen if (res > upper_limit) 1925cd2291a4SEric Sandeen res = upper_limit; 1926cd2291a4SEric Sandeen 1927cd2291a4SEric Sandeen return res; 1928cd2291a4SEric Sandeen } 1929ac27a0ecSDave Kleikamp 1930ac27a0ecSDave Kleikamp /* 1931cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 19320fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 19330fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1934ac27a0ecSDave Kleikamp */ 1935f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 1936ac27a0ecSDave Kleikamp { 1937617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 19380fc1b451SAneesh Kumar K.V int meta_blocks; 19390fc1b451SAneesh Kumar K.V loff_t upper_limit; 19400fc1b451SAneesh Kumar K.V /* This is calculated to be the largest file size for a 1941cd2291a4SEric Sandeen * dense, bitmapped file such that the total number of 1942ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 19430fc1b451SAneesh Kumar K.V * does not exceed 2^48 -1 19440fc1b451SAneesh Kumar K.V * __u32 i_blocks_lo and _u16 i_blocks_high representing the 19450fc1b451SAneesh Kumar K.V * total number of 512 bytes blocks of the file 19460fc1b451SAneesh Kumar K.V */ 19470fc1b451SAneesh Kumar K.V 1948f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 19490fc1b451SAneesh Kumar K.V /* 1950b3a6ffe1SJens Axboe * !has_huge_files or CONFIG_LBD is not enabled 1951f287a1a5STheodore Ts'o * implies the inode i_block represent total blocks in 1952f287a1a5STheodore Ts'o * 512 bytes 32 == size of vfs inode i_blocks * 8 19530fc1b451SAneesh Kumar K.V */ 19540fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 19550fc1b451SAneesh Kumar K.V 19560fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 19570fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 19580fc1b451SAneesh Kumar K.V 19590fc1b451SAneesh Kumar K.V } else { 19608180a562SAneesh Kumar K.V /* 19618180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 19628180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 19638180a562SAneesh Kumar K.V * represent total number of blocks in 19648180a562SAneesh Kumar K.V * file system block size 19658180a562SAneesh Kumar K.V */ 19660fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 19670fc1b451SAneesh Kumar K.V 19680fc1b451SAneesh Kumar K.V } 19690fc1b451SAneesh Kumar K.V 19700fc1b451SAneesh Kumar K.V /* indirect blocks */ 19710fc1b451SAneesh Kumar K.V meta_blocks = 1; 19720fc1b451SAneesh Kumar K.V /* double indirect blocks */ 19730fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 19740fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 19750fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 19760fc1b451SAneesh Kumar K.V 19770fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 19780fc1b451SAneesh Kumar K.V upper_limit <<= bits; 1979ac27a0ecSDave Kleikamp 1980ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1981ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1982ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1983ac27a0ecSDave Kleikamp res <<= bits; 1984ac27a0ecSDave Kleikamp if (res > upper_limit) 1985ac27a0ecSDave Kleikamp res = upper_limit; 19860fc1b451SAneesh Kumar K.V 19870fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 19880fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 19890fc1b451SAneesh Kumar K.V 1990ac27a0ecSDave Kleikamp return res; 1991ac27a0ecSDave Kleikamp } 1992ac27a0ecSDave Kleikamp 1993617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 199470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1995ac27a0ecSDave Kleikamp { 1996617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1997fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 1998ac27a0ecSDave Kleikamp int has_super = 0; 1999ac27a0ecSDave Kleikamp 2000ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2001ac27a0ecSDave Kleikamp 2002617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2003ac27a0ecSDave Kleikamp nr < first_meta_bg) 200470bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2005ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2006617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2007ac27a0ecSDave Kleikamp has_super = 1; 2008617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2009ac27a0ecSDave Kleikamp } 2010ac27a0ecSDave Kleikamp 2011c9de560dSAlex Tomas /** 2012c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2013c9de560dSAlex Tomas * @sbi: In memory super block info 2014c9de560dSAlex Tomas * 2015c9de560dSAlex Tomas * If we have specified it via mount option, then 2016c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2017c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2018c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2019c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2020c9de560dSAlex Tomas * 2021c9de560dSAlex Tomas */ 2022c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2023c9de560dSAlex Tomas { 2024c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2025c9de560dSAlex Tomas unsigned long stripe_width = 2026c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 2027c9de560dSAlex Tomas 2028c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 2029c9de560dSAlex Tomas return sbi->s_stripe; 2030c9de560dSAlex Tomas 2031c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 2032c9de560dSAlex Tomas return stripe_width; 2033c9de560dSAlex Tomas 2034c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 2035c9de560dSAlex Tomas return stride; 2036c9de560dSAlex Tomas 2037c9de560dSAlex Tomas return 0; 2038c9de560dSAlex Tomas } 2039ac27a0ecSDave Kleikamp 20403197ebdbSTheodore Ts'o /* sysfs supprt */ 20413197ebdbSTheodore Ts'o 20423197ebdbSTheodore Ts'o struct ext4_attr { 20433197ebdbSTheodore Ts'o struct attribute attr; 20443197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 20453197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 20463197ebdbSTheodore Ts'o const char *, size_t); 20473197ebdbSTheodore Ts'o int offset; 20483197ebdbSTheodore Ts'o }; 20493197ebdbSTheodore Ts'o 20503197ebdbSTheodore Ts'o static int parse_strtoul(const char *buf, 20513197ebdbSTheodore Ts'o unsigned long max, unsigned long *value) 20523197ebdbSTheodore Ts'o { 20533197ebdbSTheodore Ts'o char *endp; 20543197ebdbSTheodore Ts'o 20553197ebdbSTheodore Ts'o while (*buf && isspace(*buf)) 20563197ebdbSTheodore Ts'o buf++; 20573197ebdbSTheodore Ts'o *value = simple_strtoul(buf, &endp, 0); 20583197ebdbSTheodore Ts'o while (*endp && isspace(*endp)) 20593197ebdbSTheodore Ts'o endp++; 20603197ebdbSTheodore Ts'o if (*endp || *value > max) 20613197ebdbSTheodore Ts'o return -EINVAL; 20623197ebdbSTheodore Ts'o 20633197ebdbSTheodore Ts'o return 0; 20643197ebdbSTheodore Ts'o } 20653197ebdbSTheodore Ts'o 20663197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 20673197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 20683197ebdbSTheodore Ts'o char *buf) 20693197ebdbSTheodore Ts'o { 20703197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 20713197ebdbSTheodore Ts'o (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); 20723197ebdbSTheodore Ts'o } 20733197ebdbSTheodore Ts'o 20743197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 20753197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 20763197ebdbSTheodore Ts'o { 20773197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 20783197ebdbSTheodore Ts'o 20793197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 20803197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 20813197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 20823197ebdbSTheodore Ts'o } 20833197ebdbSTheodore Ts'o 20843197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 20853197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 20863197ebdbSTheodore Ts'o { 20873197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 20883197ebdbSTheodore Ts'o 20893197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 20903197ebdbSTheodore Ts'o sbi->s_kbytes_written + 20913197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 20923197ebdbSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 20933197ebdbSTheodore Ts'o } 20943197ebdbSTheodore Ts'o 20953197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 20963197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 20973197ebdbSTheodore Ts'o const char *buf, size_t count) 20983197ebdbSTheodore Ts'o { 20993197ebdbSTheodore Ts'o unsigned long t; 21003197ebdbSTheodore Ts'o 21013197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0x40000000, &t)) 21023197ebdbSTheodore Ts'o return -EINVAL; 21033197ebdbSTheodore Ts'o 2104*f7c43950STheodore Ts'o if (!is_power_of_2(t)) 21053197ebdbSTheodore Ts'o return -EINVAL; 21063197ebdbSTheodore Ts'o 21073197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 21083197ebdbSTheodore Ts'o return count; 21093197ebdbSTheodore Ts'o } 21103197ebdbSTheodore Ts'o 21113197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 21123197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 21133197ebdbSTheodore Ts'o { 21143197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 21153197ebdbSTheodore Ts'o 21163197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 21173197ebdbSTheodore Ts'o } 21183197ebdbSTheodore Ts'o 21193197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 21203197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 21213197ebdbSTheodore Ts'o const char *buf, size_t count) 21223197ebdbSTheodore Ts'o { 21233197ebdbSTheodore Ts'o unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); 21243197ebdbSTheodore Ts'o unsigned long t; 21253197ebdbSTheodore Ts'o 21263197ebdbSTheodore Ts'o if (parse_strtoul(buf, 0xffffffff, &t)) 21273197ebdbSTheodore Ts'o return -EINVAL; 21283197ebdbSTheodore Ts'o *ui = t; 21293197ebdbSTheodore Ts'o return count; 21303197ebdbSTheodore Ts'o } 21313197ebdbSTheodore Ts'o 21323197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 21333197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 21343197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 21353197ebdbSTheodore Ts'o .show = _show, \ 21363197ebdbSTheodore Ts'o .store = _store, \ 21373197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname), \ 21383197ebdbSTheodore Ts'o } 21393197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 21403197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 21413197ebdbSTheodore Ts'o 21423197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 21433197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 21443197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 21453197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 21463197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 21473197ebdbSTheodore Ts'o 21483197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 21493197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 21503197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 21513197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 21523197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 21533197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 21543197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 21553197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 21563197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 21573197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 21583197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 21593197ebdbSTheodore Ts'o 21603197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 21613197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 21623197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 21633197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 21643197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 21653197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 21663197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 21673197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 21683197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 21693197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 21703197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 21713197ebdbSTheodore Ts'o NULL, 21723197ebdbSTheodore Ts'o }; 21733197ebdbSTheodore Ts'o 21743197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 21753197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 21763197ebdbSTheodore Ts'o { 21773197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 21783197ebdbSTheodore Ts'o s_kobj); 21793197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 21803197ebdbSTheodore Ts'o 21813197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 21823197ebdbSTheodore Ts'o } 21833197ebdbSTheodore Ts'o 21843197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 21853197ebdbSTheodore Ts'o struct attribute *attr, 21863197ebdbSTheodore Ts'o const char *buf, size_t len) 21873197ebdbSTheodore Ts'o { 21883197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 21893197ebdbSTheodore Ts'o s_kobj); 21903197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 21913197ebdbSTheodore Ts'o 21923197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 21933197ebdbSTheodore Ts'o } 21943197ebdbSTheodore Ts'o 21953197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 21963197ebdbSTheodore Ts'o { 21973197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 21983197ebdbSTheodore Ts'o s_kobj); 21993197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 22003197ebdbSTheodore Ts'o } 22013197ebdbSTheodore Ts'o 22023197ebdbSTheodore Ts'o 22033197ebdbSTheodore Ts'o static struct sysfs_ops ext4_attr_ops = { 22043197ebdbSTheodore Ts'o .show = ext4_attr_show, 22053197ebdbSTheodore Ts'o .store = ext4_attr_store, 22063197ebdbSTheodore Ts'o }; 22073197ebdbSTheodore Ts'o 22083197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 22093197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 22103197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 22113197ebdbSTheodore Ts'o .release = ext4_sb_release, 22123197ebdbSTheodore Ts'o }; 22133197ebdbSTheodore Ts'o 2214617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 22157477827fSAneesh Kumar K.V __releases(kernel_lock) 22167477827fSAneesh Kumar K.V __acquires(kernel_lock) 22171d03ec98SAneesh Kumar K.V 2218ac27a0ecSDave Kleikamp { 2219ac27a0ecSDave Kleikamp struct buffer_head *bh; 2220617ba13bSMingming Cao struct ext4_super_block *es = NULL; 2221617ba13bSMingming Cao struct ext4_sb_info *sbi; 2222617ba13bSMingming Cao ext4_fsblk_t block; 2223617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 222470bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2225ac27a0ecSDave Kleikamp unsigned long offset = 0; 2226ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2227ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2228ac27a0ecSDave Kleikamp struct inode *root; 22299f6200bbSTheodore Ts'o char *cp; 22300390131bSFrank Mayhar const char *descr; 22311d1fe1eeSDavid Howells int ret = -EINVAL; 2232ac27a0ecSDave Kleikamp int blocksize; 22334ec11028STheodore Ts'o unsigned int db_count; 22344ec11028STheodore Ts'o unsigned int i; 2235f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 22363a06d778SAneesh Kumar K.V int features; 2237bd81d8eeSLaurent Vivier __u64 blocks_count; 2238833f4077SPeter Zijlstra int err; 2239b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2240ac27a0ecSDave Kleikamp 2241ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2242ac27a0ecSDave Kleikamp if (!sbi) 2243ac27a0ecSDave Kleikamp return -ENOMEM; 2244705895b6SPekka Enberg 2245705895b6SPekka Enberg sbi->s_blockgroup_lock = 2246705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 2247705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 2248705895b6SPekka Enberg kfree(sbi); 2249705895b6SPekka Enberg return -ENOMEM; 2250705895b6SPekka Enberg } 2251ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2252ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2253617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2254617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2255240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2256d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2257afc32f7eSTheodore Ts'o sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, 2258afc32f7eSTheodore Ts'o sectors[1]); 2259ac27a0ecSDave Kleikamp 2260ac27a0ecSDave Kleikamp unlock_kernel(); 2261ac27a0ecSDave Kleikamp 22629f6200bbSTheodore Ts'o /* Cleanup superblock name */ 22639f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 22649f6200bbSTheodore Ts'o *cp = '!'; 22659f6200bbSTheodore Ts'o 2266617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2267ac27a0ecSDave Kleikamp if (!blocksize) { 2268617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 2269ac27a0ecSDave Kleikamp goto out_fail; 2270ac27a0ecSDave Kleikamp } 2271ac27a0ecSDave Kleikamp 2272ac27a0ecSDave Kleikamp /* 2273617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2274ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2275ac27a0ecSDave Kleikamp */ 2276617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 227770bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 227870bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2279ac27a0ecSDave Kleikamp } else { 228070bbb3e0SAndrew Morton logical_sb_block = sb_block; 2281ac27a0ecSDave Kleikamp } 2282ac27a0ecSDave Kleikamp 228370bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2284617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); 2285ac27a0ecSDave Kleikamp goto out_fail; 2286ac27a0ecSDave Kleikamp } 2287ac27a0ecSDave Kleikamp /* 2288ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2289617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2290ac27a0ecSDave Kleikamp */ 2291617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2292ac27a0ecSDave Kleikamp sbi->s_es = es; 2293ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2294617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2295617ba13bSMingming Cao goto cantfind_ext4; 2296afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 2297ac27a0ecSDave Kleikamp 2298ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2299ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2300617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2301ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2302617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 2303ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2304617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2305ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 230603010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2307617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2308ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 23092e7842b8SHugh Dickins #endif 231003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2311617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2312ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 23132e7842b8SHugh Dickins #endif 2314617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2315617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 2316617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2317617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 2318617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2319617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 2320ac27a0ecSDave Kleikamp 2321617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2322ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2323bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2324ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2325bb4f397aSAneesh Kumar K.V else 2326bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2327ac27a0ecSDave Kleikamp 2328ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2329ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 233030773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 233130773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 233230773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2333ac27a0ecSDave Kleikamp 2334571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2335ac27a0ecSDave Kleikamp 23361e2462f9SMingming Cao /* 2337dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2338dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2339dd919b98SAneesh Kumar K.V */ 2340dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2341dd919b98SAneesh Kumar K.V 2342dd919b98SAneesh Kumar K.V 2343b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2344b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2345ac27a0ecSDave Kleikamp goto failed_mount; 2346ac27a0ecSDave Kleikamp 2347ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2348617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2349ac27a0ecSDave Kleikamp 2350617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2351617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2352617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2353617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2354ac27a0ecSDave Kleikamp printk(KERN_WARNING 2355617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 2356ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 2357469108ffSTheodore Tso 2358469108ffSTheodore Tso /* 2359ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2360ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2361ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2362ac27a0ecSDave Kleikamp */ 2363617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 2364ac27a0ecSDave Kleikamp if (features) { 2365617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 23663a06d778SAneesh Kumar K.V "unsupported optional features (%x).\n", sb->s_id, 23673a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 23683a06d778SAneesh Kumar K.V ~EXT4_FEATURE_INCOMPAT_SUPP)); 2369ac27a0ecSDave Kleikamp goto failed_mount; 2370ac27a0ecSDave Kleikamp } 2371617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 2372ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 2373617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 23743a06d778SAneesh Kumar K.V "unsupported optional features (%x).\n", sb->s_id, 23753a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 23763a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2377ac27a0ecSDave Kleikamp goto failed_mount; 2378ac27a0ecSDave Kleikamp } 2379f287a1a5STheodore Ts'o has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2380f287a1a5STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2381f287a1a5STheodore Ts'o if (has_huge_files) { 23820fc1b451SAneesh Kumar K.V /* 23830fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 2384b3a6ffe1SJens Axboe * mount if kernel is build with CONFIG_LBD 23850fc1b451SAneesh Kumar K.V */ 23860fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 23870fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 23880fc1b451SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " 23890fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 2390b3a6ffe1SJens Axboe "without CONFIG_LBD.\n", sb->s_id); 23910fc1b451SAneesh Kumar K.V goto failed_mount; 23920fc1b451SAneesh Kumar K.V } 23930fc1b451SAneesh Kumar K.V } 2394ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2395ac27a0ecSDave Kleikamp 2396617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2397617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2398ac27a0ecSDave Kleikamp printk(KERN_ERR 2399617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 2400ac27a0ecSDave Kleikamp blocksize, sb->s_id); 2401ac27a0ecSDave Kleikamp goto failed_mount; 2402ac27a0ecSDave Kleikamp } 2403ac27a0ecSDave Kleikamp 2404ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2405ce40733cSAneesh Kumar K.V 2406ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2407ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2408ce40733cSAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: bad block size %d.\n", 2409ce40733cSAneesh Kumar K.V blocksize); 2410ac27a0ecSDave Kleikamp goto failed_mount; 2411ac27a0ecSDave Kleikamp } 2412ac27a0ecSDave Kleikamp 2413ac27a0ecSDave Kleikamp brelse(bh); 241470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 241570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 241670bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2417ac27a0ecSDave Kleikamp if (!bh) { 2418ac27a0ecSDave Kleikamp printk(KERN_ERR 2419617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 2420ac27a0ecSDave Kleikamp goto failed_mount; 2421ac27a0ecSDave Kleikamp } 2422617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2423ac27a0ecSDave Kleikamp sbi->s_es = es; 2424617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2425ac27a0ecSDave Kleikamp printk(KERN_ERR 2426617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 2427ac27a0ecSDave Kleikamp goto failed_mount; 2428ac27a0ecSDave Kleikamp } 2429ac27a0ecSDave Kleikamp } 2430ac27a0ecSDave Kleikamp 2431f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2432f287a1a5STheodore Ts'o has_huge_files); 2433f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2434ac27a0ecSDave Kleikamp 2435617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2436617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2437617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2438ac27a0ecSDave Kleikamp } else { 2439ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2440ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2441617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 24421330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2443ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2444ac27a0ecSDave Kleikamp printk(KERN_ERR 2445617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 2446ac27a0ecSDave Kleikamp sbi->s_inode_size); 2447ac27a0ecSDave Kleikamp goto failed_mount; 2448ac27a0ecSDave Kleikamp } 2449ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2450ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2451ac27a0ecSDave Kleikamp } 24520d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 24530d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 24548fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 24550d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2456d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 24570d1ee42fSAlexandre Ratchov printk(KERN_ERR 24588fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 24590d1ee42fSAlexandre Ratchov sbi->s_desc_size); 24600d1ee42fSAlexandre Ratchov goto failed_mount; 24610d1ee42fSAlexandre Ratchov } 24620d1ee42fSAlexandre Ratchov } else 24630d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 2464ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2465ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2466b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2467617ba13bSMingming Cao goto cantfind_ext4; 2468617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2469ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2470617ba13bSMingming Cao goto cantfind_ext4; 2471ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2472ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 24730d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2474ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2475ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2476e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2477e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 2478ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2479ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2480ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2481f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2482f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2483f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2484f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2485f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2486f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2487f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2488f99b2589STheodore Ts'o #else 2489f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2490f99b2589STheodore Ts'o #endif 2491f99b2589STheodore Ts'o sb->s_dirt = 1; 2492f99b2589STheodore Ts'o } 2493ac27a0ecSDave Kleikamp 2494ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2495ac27a0ecSDave Kleikamp printk(KERN_ERR 2496617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 2497ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2498ac27a0ecSDave Kleikamp goto failed_mount; 2499ac27a0ecSDave Kleikamp } 2500ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2501ac27a0ecSDave Kleikamp printk(KERN_ERR 2502617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 2503ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2504ac27a0ecSDave Kleikamp goto failed_mount; 2505ac27a0ecSDave Kleikamp } 2506ac27a0ecSDave Kleikamp 2507bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2508ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2509617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 2510ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 2511ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 2512617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 2513ac27a0ecSDave Kleikamp "enabled\n"); 2514ac27a0ecSDave Kleikamp goto failed_mount; 2515ac27a0ecSDave Kleikamp } 2516ac27a0ecSDave Kleikamp 2517617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2518617ba13bSMingming Cao goto cantfind_ext4; 2519e7c95593SEric Sandeen 25200f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 25210f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 25220f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 25230f2ddca6SFrom: Thiemo Nagel printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu " 25240f2ddca6SFrom: Thiemo Nagel "exceeds size of device (%llu blocks)\n", 25250f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 25260f2ddca6SFrom: Thiemo Nagel goto failed_mount; 25270f2ddca6SFrom: Thiemo Nagel } 25280f2ddca6SFrom: Thiemo Nagel 25294ec11028STheodore Ts'o /* 25304ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 25314ec11028STheodore Ts'o * of the filesystem. 25324ec11028STheodore Ts'o */ 25334ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 25344ec11028STheodore Ts'o printk(KERN_WARNING "EXT4-fs: bad geometry: first data" 25354ec11028STheodore Ts'o "block %u is beyond end of filesystem (%llu)\n", 2536e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 25374ec11028STheodore Ts'o ext4_blocks_count(es)); 2538e7c95593SEric Sandeen goto failed_mount; 2539e7c95593SEric Sandeen } 2540bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2541bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2542bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2543bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 25444ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 25454ec11028STheodore Ts'o printk(KERN_WARNING "EXT4-fs: groups count too large: %u " 25464ec11028STheodore Ts'o "(block count %llu, first data block %u, " 25474ec11028STheodore Ts'o "blocks per group %lu)\n", sbi->s_groups_count, 25484ec11028STheodore Ts'o ext4_blocks_count(es), 25494ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 25504ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 25514ec11028STheodore Ts'o goto failed_mount; 25524ec11028STheodore Ts'o } 2553bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2554617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2555617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2556ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2557ac27a0ecSDave Kleikamp GFP_KERNEL); 2558ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2559617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: not enough memory\n"); 2560ac27a0ecSDave Kleikamp goto failed_mount; 2561ac27a0ecSDave Kleikamp } 2562ac27a0ecSDave Kleikamp 25633244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 25649f6200bbSTheodore Ts'o if (ext4_proc_root) 25659f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 25663244fcb1SAlexander Beregalov #endif 2567240799cdSTheodore Ts'o 2568705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 2569ac27a0ecSDave Kleikamp 2570ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 257170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2572ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2573ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2574617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: " 2575ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 2576ac27a0ecSDave Kleikamp db_count = i; 2577ac27a0ecSDave Kleikamp goto failed_mount2; 2578ac27a0ecSDave Kleikamp } 2579ac27a0ecSDave Kleikamp } 2580617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2581617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 2582ac27a0ecSDave Kleikamp goto failed_mount2; 2583ac27a0ecSDave Kleikamp } 2584772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2585772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2586772cb7c8SJose R. Santos printk(KERN_ERR 2587772cb7c8SJose R. Santos "EXT4-fs: unable to initialize " 2588772cb7c8SJose R. Santos "flex_bg meta info!\n"); 2589772cb7c8SJose R. Santos goto failed_mount2; 2590772cb7c8SJose R. Santos } 2591772cb7c8SJose R. Santos 2592ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2593ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2594ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2595ac27a0ecSDave Kleikamp 2596833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2597617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2598833f4077SPeter Zijlstra if (!err) { 2599833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2600617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2601833f4077SPeter Zijlstra } 2602833f4077SPeter Zijlstra if (!err) { 2603833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2604617ba13bSMingming Cao ext4_count_dirs(sb)); 2605833f4077SPeter Zijlstra } 26066bc6e63fSAneesh Kumar K.V if (!err) { 26076bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 26086bc6e63fSAneesh Kumar K.V } 2609833f4077SPeter Zijlstra if (err) { 2610833f4077SPeter Zijlstra printk(KERN_ERR "EXT4-fs: insufficient memory\n"); 2611833f4077SPeter Zijlstra goto failed_mount3; 2612833f4077SPeter Zijlstra } 2613ac27a0ecSDave Kleikamp 2614c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2615c9de560dSAlex Tomas 2616ac27a0ecSDave Kleikamp /* 2617ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2618ac27a0ecSDave Kleikamp */ 2619617ba13bSMingming Cao sb->s_op = &ext4_sops; 2620617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2621617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2622ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2623617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2624617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2625ac27a0ecSDave Kleikamp #endif 2626ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 2627ac27a0ecSDave Kleikamp 2628ac27a0ecSDave Kleikamp sb->s_root = NULL; 2629ac27a0ecSDave Kleikamp 2630ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2631617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2632617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2633ac27a0ecSDave Kleikamp 2634ac27a0ecSDave Kleikamp /* 2635ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2636ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2637ac27a0ecSDave Kleikamp */ 2638ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2639617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2640617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2641ac27a0ecSDave Kleikamp goto failed_mount3; 2642624080edSTheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && 2643624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit) { 2644624080edSTheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): " 2645624080edSTheodore Ts'o "ext4_fill_super: Journal transaction " 2646624080edSTheodore Ts'o "%u is corrupt\n", sb->s_id, 2647624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit); 2648624080edSTheodore Ts'o if (test_opt(sb, ERRORS_RO)) { 2649624080edSTheodore Ts'o printk(KERN_CRIT 2650624080edSTheodore Ts'o "Mounting filesystem read-only\n"); 2651624080edSTheodore Ts'o sb->s_flags |= MS_RDONLY; 2652624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2653624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2654624080edSTheodore Ts'o } 2655624080edSTheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) { 2656624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2657624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2658624080edSTheodore Ts'o ext4_commit_super(sb, es, 1); 2659624080edSTheodore Ts'o goto failed_mount4; 2660624080edSTheodore Ts'o } 2661624080edSTheodore Ts'o } 26620390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 26630390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 26640390131bSFrank Mayhar printk(KERN_ERR "EXT4-fs: required journal recovery " 26650390131bSFrank Mayhar "suppressed and not mounted read-only\n"); 26660390131bSFrank Mayhar goto failed_mount4; 2667ac27a0ecSDave Kleikamp } else { 26680390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 26690390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 26700390131bSFrank Mayhar sbi->s_journal = NULL; 26710390131bSFrank Mayhar needs_recovery = 0; 26720390131bSFrank Mayhar goto no_journal; 2673ac27a0ecSDave Kleikamp } 2674ac27a0ecSDave Kleikamp 2675eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2676eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2677eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2678abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: Failed to set 64-bit journal feature\n"); 2679eb40a09cSJose R. Santos goto failed_mount4; 2680eb40a09cSJose R. Santos } 2681eb40a09cSJose R. Santos 2682818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2683818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2684818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2685818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2686818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2687818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2688818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2689818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2690818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2691818d276cSGirish Shilamkar } else { 2692818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2693818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2694818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2695818d276cSGirish Shilamkar } 2696818d276cSGirish Shilamkar 2697ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2698ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2699ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2700ac27a0ecSDave Kleikamp case 0: 2701ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 270263f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 270363f57933SAndrew Morton * cope, else JOURNAL_DATA 270463f57933SAndrew Morton */ 2705dab291afSMingming Cao if (jbd2_journal_check_available_features 2706dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2707ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2708ac27a0ecSDave Kleikamp else 2709ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2710ac27a0ecSDave Kleikamp break; 2711ac27a0ecSDave Kleikamp 2712617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2713617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2714dab291afSMingming Cao if (!jbd2_journal_check_available_features 2715dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2716617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 2717ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 2718ac27a0ecSDave Kleikamp goto failed_mount4; 2719ac27a0ecSDave Kleikamp } 2720ac27a0ecSDave Kleikamp default: 2721ac27a0ecSDave Kleikamp break; 2722ac27a0ecSDave Kleikamp } 2723b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2724ac27a0ecSDave Kleikamp 27250390131bSFrank Mayhar no_journal: 2726ac27a0ecSDave Kleikamp 2727ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2728617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2729617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 2730ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 2731ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2732ac27a0ecSDave Kleikamp } 2733ac27a0ecSDave Kleikamp } 2734ac27a0ecSDave Kleikamp /* 2735dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2736ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2737ac27a0ecSDave Kleikamp */ 2738ac27a0ecSDave Kleikamp 27391d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 27401d1fe1eeSDavid Howells if (IS_ERR(root)) { 2741617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 27421d1fe1eeSDavid Howells ret = PTR_ERR(root); 2743ac27a0ecSDave Kleikamp goto failed_mount4; 2744ac27a0ecSDave Kleikamp } 2745ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 27461d1fe1eeSDavid Howells iput(root); 2747617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 2748ac27a0ecSDave Kleikamp goto failed_mount4; 2749ac27a0ecSDave Kleikamp } 27501d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 27511d1fe1eeSDavid Howells if (!sb->s_root) { 27521d1fe1eeSDavid Howells printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); 27531d1fe1eeSDavid Howells iput(root); 27541d1fe1eeSDavid Howells ret = -ENOMEM; 27551d1fe1eeSDavid Howells goto failed_mount4; 27561d1fe1eeSDavid Howells } 2757ac27a0ecSDave Kleikamp 2758617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2759ef7f3835SKalpak Shah 2760ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2761ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2762ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2763ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2764ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2765ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2766ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2767ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2768ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2769ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2770ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2771ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2772ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2773ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2774ef7f3835SKalpak Shah } 2775ef7f3835SKalpak Shah } 2776ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2777ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2778ef7f3835SKalpak Shah sbi->s_inode_size) { 2779ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2780ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2781ef7f3835SKalpak Shah printk(KERN_INFO "EXT4-fs: required extra inode space not" 2782ef7f3835SKalpak Shah "available.\n"); 2783ef7f3835SKalpak Shah } 2784ef7f3835SKalpak Shah 2785c2774d84SAneesh Kumar K.V if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2786c2774d84SAneesh Kumar K.V printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " 2787c2774d84SAneesh Kumar K.V "requested data journaling mode\n"); 2788c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 2789c2774d84SAneesh Kumar K.V } else if (test_opt(sb, DELALLOC)) 2790c2774d84SAneesh Kumar K.V printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); 2791c2774d84SAneesh Kumar K.V 2792c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 2793c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 2794c2774d84SAneesh Kumar K.V if (err) { 2795c2774d84SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", 2796c2774d84SAneesh Kumar K.V err); 2797c2774d84SAneesh Kumar K.V goto failed_mount4; 2798c2774d84SAneesh Kumar K.V } 2799c2774d84SAneesh Kumar K.V 28003197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 28013197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 28023197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 28033197ebdbSTheodore Ts'o "%s", sb->s_id); 28043197ebdbSTheodore Ts'o if (err) { 28053197ebdbSTheodore Ts'o ext4_mb_release(sb); 28063197ebdbSTheodore Ts'o ext4_ext_release(sb); 28073197ebdbSTheodore Ts'o goto failed_mount4; 28083197ebdbSTheodore Ts'o }; 28093197ebdbSTheodore Ts'o 2810ac27a0ecSDave Kleikamp /* 2811ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 2812ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 2813ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 2814ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 2815ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 2816ac27a0ecSDave Kleikamp * superblock lock. 2817ac27a0ecSDave Kleikamp */ 2818617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2819617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2820617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 28210390131bSFrank Mayhar if (needs_recovery) { 2822617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: recovery complete.\n"); 2823617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 28240390131bSFrank Mayhar } 28250390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 28260390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 28270390131bSFrank Mayhar descr = " journalled data mode"; 28280390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 28290390131bSFrank Mayhar descr = " ordered data mode"; 28300390131bSFrank Mayhar else 28310390131bSFrank Mayhar descr = " writeback data mode"; 28320390131bSFrank Mayhar } else 28330390131bSFrank Mayhar descr = "out journal"; 28340390131bSFrank Mayhar 28350390131bSFrank Mayhar printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", 28360390131bSFrank Mayhar sb->s_id, descr); 2837ac27a0ecSDave Kleikamp 2838ac27a0ecSDave Kleikamp lock_kernel(); 2839ac27a0ecSDave Kleikamp return 0; 2840ac27a0ecSDave Kleikamp 2841617ba13bSMingming Cao cantfind_ext4: 2842ac27a0ecSDave Kleikamp if (!silent) 2843617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 2844ac27a0ecSDave Kleikamp sb->s_id); 2845ac27a0ecSDave Kleikamp goto failed_mount; 2846ac27a0ecSDave Kleikamp 2847ac27a0ecSDave Kleikamp failed_mount4: 28480390131bSFrank Mayhar printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); 28490390131bSFrank Mayhar if (sbi->s_journal) { 2850dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 285147b4a50bSJan Kara sbi->s_journal = NULL; 28520390131bSFrank Mayhar } 2853ac27a0ecSDave Kleikamp failed_mount3: 2854c5ca7c76STheodore Ts'o if (sbi->s_flex_groups) { 2855c5ca7c76STheodore Ts'o if (is_vmalloc_addr(sbi->s_flex_groups)) 2856c5ca7c76STheodore Ts'o vfree(sbi->s_flex_groups); 2857c5ca7c76STheodore Ts'o else 2858c5ca7c76STheodore Ts'o kfree(sbi->s_flex_groups); 2859c5ca7c76STheodore Ts'o } 2860ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2861ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2862ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 28636bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 2864ac27a0ecSDave Kleikamp failed_mount2: 2865ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2866ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2867ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2868ac27a0ecSDave Kleikamp failed_mount: 2869240799cdSTheodore Ts'o if (sbi->s_proc) { 28709f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 2871240799cdSTheodore Ts'o } 2872ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2873ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2874ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2875ac27a0ecSDave Kleikamp #endif 2876617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2877ac27a0ecSDave Kleikamp brelse(bh); 2878ac27a0ecSDave Kleikamp out_fail: 2879ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2880ac27a0ecSDave Kleikamp kfree(sbi); 2881ac27a0ecSDave Kleikamp lock_kernel(); 28821d1fe1eeSDavid Howells return ret; 2883ac27a0ecSDave Kleikamp } 2884ac27a0ecSDave Kleikamp 2885ac27a0ecSDave Kleikamp /* 2886ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2887ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2888ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2889ac27a0ecSDave Kleikamp */ 2890617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2891ac27a0ecSDave Kleikamp { 2892617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2893ac27a0ecSDave Kleikamp 2894ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 289530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 289630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 2897ac27a0ecSDave Kleikamp 2898ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2899ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2900dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2901ac27a0ecSDave Kleikamp else 2902dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 29035bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 29045bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 29055bf5683aSHidehiro Kawai else 29065bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 2907ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2908ac27a0ecSDave Kleikamp } 2909ac27a0ecSDave Kleikamp 2910617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2911ac27a0ecSDave Kleikamp unsigned int journal_inum) 2912ac27a0ecSDave Kleikamp { 2913ac27a0ecSDave Kleikamp struct inode *journal_inode; 2914ac27a0ecSDave Kleikamp journal_t *journal; 2915ac27a0ecSDave Kleikamp 29160390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 29170390131bSFrank Mayhar 2918ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2919ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2920ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2921ac27a0ecSDave Kleikamp 29221d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 29231d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 2924617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 2925ac27a0ecSDave Kleikamp return NULL; 2926ac27a0ecSDave Kleikamp } 2927ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2928ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2929ac27a0ecSDave Kleikamp iput(journal_inode); 2930617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 2931ac27a0ecSDave Kleikamp return NULL; 2932ac27a0ecSDave Kleikamp } 2933ac27a0ecSDave Kleikamp 2934e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 2935ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 29361d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 2937617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 2938ac27a0ecSDave Kleikamp iput(journal_inode); 2939ac27a0ecSDave Kleikamp return NULL; 2940ac27a0ecSDave Kleikamp } 2941ac27a0ecSDave Kleikamp 2942dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2943ac27a0ecSDave Kleikamp if (!journal) { 2944617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 2945ac27a0ecSDave Kleikamp iput(journal_inode); 2946ac27a0ecSDave Kleikamp return NULL; 2947ac27a0ecSDave Kleikamp } 2948ac27a0ecSDave Kleikamp journal->j_private = sb; 2949617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2950ac27a0ecSDave Kleikamp return journal; 2951ac27a0ecSDave Kleikamp } 2952ac27a0ecSDave Kleikamp 2953617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 2954ac27a0ecSDave Kleikamp dev_t j_dev) 2955ac27a0ecSDave Kleikamp { 2956ac27a0ecSDave Kleikamp struct buffer_head *bh; 2957ac27a0ecSDave Kleikamp journal_t *journal; 2958617ba13bSMingming Cao ext4_fsblk_t start; 2959617ba13bSMingming Cao ext4_fsblk_t len; 2960ac27a0ecSDave Kleikamp int hblock, blocksize; 2961617ba13bSMingming Cao ext4_fsblk_t sb_block; 2962ac27a0ecSDave Kleikamp unsigned long offset; 2963617ba13bSMingming Cao struct ext4_super_block *es; 2964ac27a0ecSDave Kleikamp struct block_device *bdev; 2965ac27a0ecSDave Kleikamp 29660390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 29670390131bSFrank Mayhar 2968617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 2969ac27a0ecSDave Kleikamp if (bdev == NULL) 2970ac27a0ecSDave Kleikamp return NULL; 2971ac27a0ecSDave Kleikamp 2972ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 2973ac27a0ecSDave Kleikamp printk(KERN_ERR 2974abda1418STheodore Ts'o "EXT4-fs: failed to claim external journal device.\n"); 29759a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 2976ac27a0ecSDave Kleikamp return NULL; 2977ac27a0ecSDave Kleikamp } 2978ac27a0ecSDave Kleikamp 2979ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2980ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2981ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2982ac27a0ecSDave Kleikamp printk(KERN_ERR 2983617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2984ac27a0ecSDave Kleikamp goto out_bdev; 2985ac27a0ecSDave Kleikamp } 2986ac27a0ecSDave Kleikamp 2987617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2988617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2989ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2990ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2991617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2992ac27a0ecSDave Kleikamp "external journal\n"); 2993ac27a0ecSDave Kleikamp goto out_bdev; 2994ac27a0ecSDave Kleikamp } 2995ac27a0ecSDave Kleikamp 2996617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2997617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2998ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2999617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 3000617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 3001ac27a0ecSDave Kleikamp "bad superblock\n"); 3002ac27a0ecSDave Kleikamp brelse(bh); 3003ac27a0ecSDave Kleikamp goto out_bdev; 3004ac27a0ecSDave Kleikamp } 3005ac27a0ecSDave Kleikamp 3006617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 3007617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 3008ac27a0ecSDave Kleikamp brelse(bh); 3009ac27a0ecSDave Kleikamp goto out_bdev; 3010ac27a0ecSDave Kleikamp } 3011ac27a0ecSDave Kleikamp 3012bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 3013ac27a0ecSDave Kleikamp start = sb_block + 1; 3014ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 3015ac27a0ecSDave Kleikamp 3016dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 3017ac27a0ecSDave Kleikamp start, len, blocksize); 3018ac27a0ecSDave Kleikamp if (!journal) { 3019617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 3020ac27a0ecSDave Kleikamp goto out_bdev; 3021ac27a0ecSDave Kleikamp } 3022ac27a0ecSDave Kleikamp journal->j_private = sb; 3023ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 3024ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 3025ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 3026617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 3027ac27a0ecSDave Kleikamp goto out_journal; 3028ac27a0ecSDave Kleikamp } 3029ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 3030617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 3031ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 3032ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 3033ac27a0ecSDave Kleikamp goto out_journal; 3034ac27a0ecSDave Kleikamp } 3035617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 3036617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 3037ac27a0ecSDave Kleikamp return journal; 3038ac27a0ecSDave Kleikamp out_journal: 3039dab291afSMingming Cao jbd2_journal_destroy(journal); 3040ac27a0ecSDave Kleikamp out_bdev: 3041617ba13bSMingming Cao ext4_blkdev_put(bdev); 3042ac27a0ecSDave Kleikamp return NULL; 3043ac27a0ecSDave Kleikamp } 3044ac27a0ecSDave Kleikamp 3045617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 3046617ba13bSMingming Cao struct ext4_super_block *es, 3047ac27a0ecSDave Kleikamp unsigned long journal_devnum) 3048ac27a0ecSDave Kleikamp { 3049ac27a0ecSDave Kleikamp journal_t *journal; 3050ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 3051ac27a0ecSDave Kleikamp dev_t journal_dev; 3052ac27a0ecSDave Kleikamp int err = 0; 3053ac27a0ecSDave Kleikamp int really_read_only; 3054ac27a0ecSDave Kleikamp 30550390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 30560390131bSFrank Mayhar 3057ac27a0ecSDave Kleikamp if (journal_devnum && 3058ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3059617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 3060ac27a0ecSDave Kleikamp "numbers have changed\n"); 3061ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 3062ac27a0ecSDave Kleikamp } else 3063ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 3064ac27a0ecSDave Kleikamp 3065ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 3066ac27a0ecSDave Kleikamp 3067ac27a0ecSDave Kleikamp /* 3068ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 3069ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 3070ac27a0ecSDave Kleikamp * can get read-write access to the device. 3071ac27a0ecSDave Kleikamp */ 3072ac27a0ecSDave Kleikamp 3073617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3074ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 3075617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 3076ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 3077ac27a0ecSDave Kleikamp if (really_read_only) { 3078617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 3079ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 3080ac27a0ecSDave Kleikamp return -EROFS; 3081ac27a0ecSDave Kleikamp } 3082617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: write access will " 3083ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 3084ac27a0ecSDave Kleikamp } 3085ac27a0ecSDave Kleikamp } 3086ac27a0ecSDave Kleikamp 3087ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 3088617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 3089ac27a0ecSDave Kleikamp "and inode journals!\n"); 3090ac27a0ecSDave Kleikamp return -EINVAL; 3091ac27a0ecSDave Kleikamp } 3092ac27a0ecSDave Kleikamp 3093ac27a0ecSDave Kleikamp if (journal_inum) { 3094617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 3095ac27a0ecSDave Kleikamp return -EINVAL; 3096ac27a0ecSDave Kleikamp } else { 3097617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 3098ac27a0ecSDave Kleikamp return -EINVAL; 3099ac27a0ecSDave Kleikamp } 3100ac27a0ecSDave Kleikamp 31014776004fSTheodore Ts'o if (journal->j_flags & JBD2_BARRIER) 31024776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers enabled\n"); 31034776004fSTheodore Ts'o else 31044776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers disabled\n"); 31054776004fSTheodore Ts'o 3106ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 3107dab291afSMingming Cao err = jbd2_journal_update_format(journal); 3108ac27a0ecSDave Kleikamp if (err) { 3109617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 3110dab291afSMingming Cao jbd2_journal_destroy(journal); 3111ac27a0ecSDave Kleikamp return err; 3112ac27a0ecSDave Kleikamp } 3113ac27a0ecSDave Kleikamp } 3114ac27a0ecSDave Kleikamp 3115617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 3116dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 3117ac27a0ecSDave Kleikamp if (!err) 3118dab291afSMingming Cao err = jbd2_journal_load(journal); 3119ac27a0ecSDave Kleikamp 3120ac27a0ecSDave Kleikamp if (err) { 3121617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 3122dab291afSMingming Cao jbd2_journal_destroy(journal); 3123ac27a0ecSDave Kleikamp return err; 3124ac27a0ecSDave Kleikamp } 3125ac27a0ecSDave Kleikamp 3126617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 3127617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3128ac27a0ecSDave Kleikamp 3129ac27a0ecSDave Kleikamp if (journal_devnum && 3130ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 3131ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 3132ac27a0ecSDave Kleikamp sb->s_dirt = 1; 3133ac27a0ecSDave Kleikamp 3134ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 3135617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 3136ac27a0ecSDave Kleikamp } 3137ac27a0ecSDave Kleikamp 3138ac27a0ecSDave Kleikamp return 0; 3139ac27a0ecSDave Kleikamp } 3140ac27a0ecSDave Kleikamp 3141c4be0c1dSTakashi Sato static int ext4_commit_super(struct super_block *sb, 31422b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync) 3143ac27a0ecSDave Kleikamp { 3144617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 3145c4be0c1dSTakashi Sato int error = 0; 3146ac27a0ecSDave Kleikamp 3147ac27a0ecSDave Kleikamp if (!sbh) 3148c4be0c1dSTakashi Sato return error; 3149914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 3150914258bfSTheodore Ts'o /* 3151914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 3152914258bfSTheodore Ts'o * superblock failed. This could happen because the 3153914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 3154914258bfSTheodore Ts'o * be a transient write error and maybe the block will 3155914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 3156914258bfSTheodore Ts'o * write and hope for the best. 3157914258bfSTheodore Ts'o */ 3158abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: previous I/O error to " 3159914258bfSTheodore Ts'o "superblock detected for %s.\n", sb->s_id); 3160914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3161914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3162914258bfSTheodore Ts'o } 3163ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 3164afc32f7eSTheodore Ts'o es->s_kbytes_written = 3165afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 3166afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 3167afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 31685d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 31695d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 31705d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 31715d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 31725d1b1b3fSAneesh Kumar K.V 3173ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 3174ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 3175914258bfSTheodore Ts'o if (sync) { 3176c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 3177c4be0c1dSTakashi Sato if (error) 3178c4be0c1dSTakashi Sato return error; 3179c4be0c1dSTakashi Sato 3180c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 3181c4be0c1dSTakashi Sato if (error) { 3182abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: I/O error while writing " 3183914258bfSTheodore Ts'o "superblock for %s.\n", sb->s_id); 3184914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 3185914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 3186914258bfSTheodore Ts'o } 3187914258bfSTheodore Ts'o } 3188c4be0c1dSTakashi Sato return error; 3189ac27a0ecSDave Kleikamp } 3190ac27a0ecSDave Kleikamp 3191ac27a0ecSDave Kleikamp 3192ac27a0ecSDave Kleikamp /* 3193ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 3194ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 3195ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 3196ac27a0ecSDave Kleikamp */ 3197617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 3198617ba13bSMingming Cao struct ext4_super_block *es) 3199ac27a0ecSDave Kleikamp { 3200617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 3201ac27a0ecSDave Kleikamp 32020390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 32030390131bSFrank Mayhar BUG_ON(journal != NULL); 32040390131bSFrank Mayhar return; 32050390131bSFrank Mayhar } 3206dab291afSMingming Cao jbd2_journal_lock_updates(journal); 32077ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 32087ffe1ea8SHidehiro Kawai goto out; 32097ffe1ea8SHidehiro Kawai 321032c37730SJan Kara lock_super(sb); 3211617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 3212ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 3213617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3214ac27a0ecSDave Kleikamp sb->s_dirt = 0; 3215617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 3216ac27a0ecSDave Kleikamp } 321732c37730SJan Kara unlock_super(sb); 32187ffe1ea8SHidehiro Kawai 32197ffe1ea8SHidehiro Kawai out: 3220dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 3221ac27a0ecSDave Kleikamp } 3222ac27a0ecSDave Kleikamp 3223ac27a0ecSDave Kleikamp /* 3224ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 3225ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 3226ac27a0ecSDave Kleikamp * main filesystem now. 3227ac27a0ecSDave Kleikamp */ 3228617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 3229617ba13bSMingming Cao struct ext4_super_block *es) 3230ac27a0ecSDave Kleikamp { 3231ac27a0ecSDave Kleikamp journal_t *journal; 3232ac27a0ecSDave Kleikamp int j_errno; 3233ac27a0ecSDave Kleikamp const char *errstr; 3234ac27a0ecSDave Kleikamp 32350390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 32360390131bSFrank Mayhar 3237617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 3238ac27a0ecSDave Kleikamp 3239ac27a0ecSDave Kleikamp /* 3240ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 3241617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 3242ac27a0ecSDave Kleikamp */ 3243ac27a0ecSDave Kleikamp 3244dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 3245ac27a0ecSDave Kleikamp if (j_errno) { 3246ac27a0ecSDave Kleikamp char nbuf[16]; 3247ac27a0ecSDave Kleikamp 3248617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 324946e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 3250ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 325146e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 3252ac27a0ecSDave Kleikamp "filesystem check."); 3253ac27a0ecSDave Kleikamp 3254617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3255617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3256617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 3257ac27a0ecSDave Kleikamp 3258dab291afSMingming Cao jbd2_journal_clear_err(journal); 3259ac27a0ecSDave Kleikamp } 3260ac27a0ecSDave Kleikamp } 3261ac27a0ecSDave Kleikamp 3262ac27a0ecSDave Kleikamp /* 3263ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3264ac27a0ecSDave Kleikamp * and wait on the commit. 3265ac27a0ecSDave Kleikamp */ 3266617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3267ac27a0ecSDave Kleikamp { 3268ac27a0ecSDave Kleikamp journal_t *journal; 32690390131bSFrank Mayhar int ret = 0; 3270ac27a0ecSDave Kleikamp 3271ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3272ac27a0ecSDave Kleikamp return 0; 3273ac27a0ecSDave Kleikamp 3274617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 32750390131bSFrank Mayhar if (journal) { 3276ac27a0ecSDave Kleikamp sb->s_dirt = 0; 3277617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 32780390131bSFrank Mayhar } 32790390131bSFrank Mayhar 3280ac27a0ecSDave Kleikamp return ret; 3281ac27a0ecSDave Kleikamp } 3282ac27a0ecSDave Kleikamp 3283ac27a0ecSDave Kleikamp /* 3284617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 3285ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 328614ce0cb4STheodore Ts'o * point. (We can probably nuke this function altogether, and remove 328714ce0cb4STheodore Ts'o * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) 3288ac27a0ecSDave Kleikamp */ 3289617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3290ac27a0ecSDave Kleikamp { 32910390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 3292ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 3293ac27a0ecSDave Kleikamp BUG(); 3294ac27a0ecSDave Kleikamp sb->s_dirt = 0; 32950390131bSFrank Mayhar } else { 32960390131bSFrank Mayhar ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 32970390131bSFrank Mayhar } 3298ac27a0ecSDave Kleikamp } 3299ac27a0ecSDave Kleikamp 3300617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3301ac27a0ecSDave Kleikamp { 330214ce0cb4STheodore Ts'o int ret = 0; 33039eddacf9SJan Kara tid_t target; 3304ac27a0ecSDave Kleikamp 3305ede86cc4STheodore Ts'o trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); 3306ac27a0ecSDave Kleikamp sb->s_dirt = 0; 33070390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 33089eddacf9SJan Kara if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, 33099eddacf9SJan Kara &target)) { 3310ac27a0ecSDave Kleikamp if (wait) 33119eddacf9SJan Kara jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, 33129eddacf9SJan Kara target); 33139eddacf9SJan Kara } 33140390131bSFrank Mayhar } else { 33150390131bSFrank Mayhar ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait); 33160390131bSFrank Mayhar } 331714ce0cb4STheodore Ts'o return ret; 3318ac27a0ecSDave Kleikamp } 3319ac27a0ecSDave Kleikamp 3320ac27a0ecSDave Kleikamp /* 3321ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3322ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3323ac27a0ecSDave Kleikamp */ 3324c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3325ac27a0ecSDave Kleikamp { 3326c4be0c1dSTakashi Sato int error = 0; 3327c4be0c1dSTakashi Sato journal_t *journal; 3328ac27a0ecSDave Kleikamp sb->s_dirt = 0; 3329ac27a0ecSDave Kleikamp 3330ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 3331c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3332ac27a0ecSDave Kleikamp 33330390131bSFrank Mayhar if (journal) { 3334ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3335dab291afSMingming Cao jbd2_journal_lock_updates(journal); 33367ffe1ea8SHidehiro Kawai 33377ffe1ea8SHidehiro Kawai /* 33380390131bSFrank Mayhar * We don't want to clear needs_recovery flag when we 33390390131bSFrank Mayhar * failed to flush the journal. 33407ffe1ea8SHidehiro Kawai */ 3341c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 3342c4be0c1dSTakashi Sato if (error < 0) 3343c4be0c1dSTakashi Sato goto out; 33440390131bSFrank Mayhar } 3345ac27a0ecSDave Kleikamp 3346ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3347617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3348c4be0c1dSTakashi Sato error = ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 3349c4be0c1dSTakashi Sato if (error) 3350c4be0c1dSTakashi Sato goto out; 3351ac27a0ecSDave Kleikamp } 3352c4be0c1dSTakashi Sato return 0; 3353c4be0c1dSTakashi Sato out: 3354c4be0c1dSTakashi Sato jbd2_journal_unlock_updates(journal); 3355c4be0c1dSTakashi Sato return error; 3356ac27a0ecSDave Kleikamp } 3357ac27a0ecSDave Kleikamp 3358ac27a0ecSDave Kleikamp /* 3359ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3360ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3361ac27a0ecSDave Kleikamp */ 3362c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3363ac27a0ecSDave Kleikamp { 33640390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) { 3365ac27a0ecSDave Kleikamp lock_super(sb); 3366ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 3367617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3368617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 3369ac27a0ecSDave Kleikamp unlock_super(sb); 3370dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3371ac27a0ecSDave Kleikamp } 3372c4be0c1dSTakashi Sato return 0; 3373ac27a0ecSDave Kleikamp } 3374ac27a0ecSDave Kleikamp 3375617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3376ac27a0ecSDave Kleikamp { 3377617ba13bSMingming Cao struct ext4_super_block *es; 3378617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3379617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3380ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3381617ba13bSMingming Cao struct ext4_mount_options old_opts; 33828a266467STheodore Ts'o ext4_group_t g; 3383b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3384ac27a0ecSDave Kleikamp int err; 3385ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3386ac27a0ecSDave Kleikamp int i; 3387ac27a0ecSDave Kleikamp #endif 3388ac27a0ecSDave Kleikamp 3389ac27a0ecSDave Kleikamp /* Store the original options */ 3390ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3391ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3392ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3393ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3394ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 339530773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 339630773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3397ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3398ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3399ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3400ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3401ac27a0ecSDave Kleikamp #endif 3402b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3403b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3404ac27a0ecSDave Kleikamp 3405ac27a0ecSDave Kleikamp /* 3406ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3407ac27a0ecSDave Kleikamp */ 3408b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3409b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3410ac27a0ecSDave Kleikamp err = -EINVAL; 3411ac27a0ecSDave Kleikamp goto restore_opts; 3412ac27a0ecSDave Kleikamp } 3413ac27a0ecSDave Kleikamp 3414617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 341546e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3416ac27a0ecSDave Kleikamp 3417ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3418617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 3419ac27a0ecSDave Kleikamp 3420ac27a0ecSDave Kleikamp es = sbi->s_es; 3421ac27a0ecSDave Kleikamp 3422b3881f74STheodore Ts'o if (sbi->s_journal) { 3423617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3424b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3425b3881f74STheodore Ts'o } 3426ac27a0ecSDave Kleikamp 3427ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3428bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 3429617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 3430ac27a0ecSDave Kleikamp err = -EROFS; 3431ac27a0ecSDave Kleikamp goto restore_opts; 3432ac27a0ecSDave Kleikamp } 3433ac27a0ecSDave Kleikamp 3434ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3435ac27a0ecSDave Kleikamp /* 3436ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3437ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3438ac27a0ecSDave Kleikamp */ 3439ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3440ac27a0ecSDave Kleikamp 3441ac27a0ecSDave Kleikamp /* 3442ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3443ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3444ac27a0ecSDave Kleikamp * mark the partition as valid again. 3445ac27a0ecSDave Kleikamp */ 3446617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3447617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3448ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3449ac27a0ecSDave Kleikamp 345032c37730SJan Kara /* 345132c37730SJan Kara * We have to unlock super so that we can wait for 345232c37730SJan Kara * transactions. 345332c37730SJan Kara */ 34540390131bSFrank Mayhar if (sbi->s_journal) { 345532c37730SJan Kara unlock_super(sb); 3456617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 345732c37730SJan Kara lock_super(sb); 34580390131bSFrank Mayhar } 3459ac27a0ecSDave Kleikamp } else { 34603a06d778SAneesh Kumar K.V int ret; 3461617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3462617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 3463617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3464ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 34653a06d778SAneesh Kumar K.V "optional features (%x).\n", sb->s_id, 34663a06d778SAneesh Kumar K.V (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & 34673a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3468ac27a0ecSDave Kleikamp err = -EROFS; 3469ac27a0ecSDave Kleikamp goto restore_opts; 3470ac27a0ecSDave Kleikamp } 3471ead6596bSEric Sandeen 3472ead6596bSEric Sandeen /* 34738a266467STheodore Ts'o * Make sure the group descriptor checksums 34748a266467STheodore Ts'o * are sane. If they aren't, refuse to 34758a266467STheodore Ts'o * remount r/w. 34768a266467STheodore Ts'o */ 34778a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 34788a266467STheodore Ts'o struct ext4_group_desc *gdp = 34798a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 34808a266467STheodore Ts'o 34818a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 34828a266467STheodore Ts'o printk(KERN_ERR 34838a266467STheodore Ts'o "EXT4-fs: ext4_remount: " 3484a9df9a49STheodore Ts'o "Checksum for group %u failed (%u!=%u)\n", 34858a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 34868a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 34878a266467STheodore Ts'o err = -EINVAL; 34888a266467STheodore Ts'o goto restore_opts; 34898a266467STheodore Ts'o } 34908a266467STheodore Ts'o } 34918a266467STheodore Ts'o 34928a266467STheodore Ts'o /* 3493ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3494ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3495ead6596bSEric Sandeen * require a full umount/remount for now. 3496ead6596bSEric Sandeen */ 3497ead6596bSEric Sandeen if (es->s_last_orphan) { 3498ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3499ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3500ead6596bSEric Sandeen "orphan inode list. Please " 3501ead6596bSEric Sandeen "umount/remount instead.\n", 3502ead6596bSEric Sandeen sb->s_id); 3503ead6596bSEric Sandeen err = -EINVAL; 3504ead6596bSEric Sandeen goto restore_opts; 3505ead6596bSEric Sandeen } 3506ead6596bSEric Sandeen 3507ac27a0ecSDave Kleikamp /* 3508ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3509ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3510ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3511ac27a0ecSDave Kleikamp * the partition.) 3512ac27a0ecSDave Kleikamp */ 35130390131bSFrank Mayhar if (sbi->s_journal) 3514617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3515ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3516617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3517ac27a0ecSDave Kleikamp goto restore_opts; 3518617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3519ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3520ac27a0ecSDave Kleikamp } 3521ac27a0ecSDave Kleikamp } 35220390131bSFrank Mayhar if (sbi->s_journal == NULL) 35230390131bSFrank Mayhar ext4_commit_super(sb, es, 1); 35240390131bSFrank Mayhar 3525ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3526ac27a0ecSDave Kleikamp /* Release old quota file names */ 3527ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3528ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3529ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3530ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3531ac27a0ecSDave Kleikamp #endif 3532ac27a0ecSDave Kleikamp return 0; 3533ac27a0ecSDave Kleikamp restore_opts: 3534ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3535ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3536ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3537ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3538ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 353930773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 354030773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3541ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3542ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3543ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3544ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3545ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3546ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3547ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3548ac27a0ecSDave Kleikamp } 3549ac27a0ecSDave Kleikamp #endif 3550ac27a0ecSDave Kleikamp return err; 3551ac27a0ecSDave Kleikamp } 3552ac27a0ecSDave Kleikamp 3553617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3554ac27a0ecSDave Kleikamp { 3555ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3556617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3557617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3558960cc398SPekka Enberg u64 fsid; 3559ac27a0ecSDave Kleikamp 35605e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 35615e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 35626bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 3563fd2d4291SAvantika Mathur ext4_group_t ngroups = sbi->s_groups_count, i; 35645e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3565ac27a0ecSDave Kleikamp smp_rmb(); 3566ac27a0ecSDave Kleikamp 3567ac27a0ecSDave Kleikamp /* 35685e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 35695e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 35705e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3571ac27a0ecSDave Kleikamp */ 3572ac27a0ecSDave Kleikamp 3573ac27a0ecSDave Kleikamp /* 3574ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3575ac27a0ecSDave Kleikamp * overhead 3576ac27a0ecSDave Kleikamp */ 3577ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3578ac27a0ecSDave Kleikamp 3579ac27a0ecSDave Kleikamp /* 3580ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3581ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3582ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3583ac27a0ecSDave Kleikamp */ 3584ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3585617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3586617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3587ac27a0ecSDave Kleikamp cond_resched(); 3588ac27a0ecSDave Kleikamp } 3589ac27a0ecSDave Kleikamp 3590ac27a0ecSDave Kleikamp /* 3591ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3592ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3593ac27a0ecSDave Kleikamp */ 35945e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 35955e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 35965e70030dSBadari Pulavarty smp_wmb(); 35976bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3598ac27a0ecSDave Kleikamp } 3599ac27a0ecSDave Kleikamp 3600617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3601ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 36025e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 36036bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 36046bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3605308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 3606bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3607bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3608ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3609ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 361052d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 36115e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3612617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3613960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3614960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3615960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3616960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 3617ac27a0ecSDave Kleikamp return 0; 3618ac27a0ecSDave Kleikamp } 3619ac27a0ecSDave Kleikamp 3620ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 3621ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 3622ac27a0ecSDave Kleikamp * Process 1 Process 2 3623617ba13bSMingming Cao * ext4_create() quota_sync() 3624dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3625a269eb18SJan Kara * vfs_dq_init() down(dqio_mutex) 3626dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3627ac27a0ecSDave Kleikamp * 3628ac27a0ecSDave Kleikamp */ 3629ac27a0ecSDave Kleikamp 3630ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3631ac27a0ecSDave Kleikamp 3632ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3633ac27a0ecSDave Kleikamp { 3634ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3635ac27a0ecSDave Kleikamp } 3636ac27a0ecSDave Kleikamp 3637617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3638ac27a0ecSDave Kleikamp { 3639ac27a0ecSDave Kleikamp int ret, err; 3640ac27a0ecSDave Kleikamp handle_t *handle; 3641ac27a0ecSDave Kleikamp struct inode *inode; 3642ac27a0ecSDave Kleikamp 3643ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3644617ba13bSMingming Cao handle = ext4_journal_start(inode, 3645617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3646ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3647ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3648ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3649617ba13bSMingming Cao err = ext4_journal_stop(handle); 3650ac27a0ecSDave Kleikamp if (!ret) 3651ac27a0ecSDave Kleikamp ret = err; 3652ac27a0ecSDave Kleikamp return ret; 3653ac27a0ecSDave Kleikamp } 3654ac27a0ecSDave Kleikamp 3655617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3656ac27a0ecSDave Kleikamp { 3657ac27a0ecSDave Kleikamp int ret, err; 3658ac27a0ecSDave Kleikamp handle_t *handle; 3659ac27a0ecSDave Kleikamp 3660617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3661617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3662ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3663ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3664ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3665617ba13bSMingming Cao err = ext4_journal_stop(handle); 3666ac27a0ecSDave Kleikamp if (!ret) 3667ac27a0ecSDave Kleikamp ret = err; 3668ac27a0ecSDave Kleikamp return ret; 3669ac27a0ecSDave Kleikamp } 3670ac27a0ecSDave Kleikamp 3671617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3672ac27a0ecSDave Kleikamp { 3673ac27a0ecSDave Kleikamp int ret, err; 3674ac27a0ecSDave Kleikamp handle_t *handle; 3675ac27a0ecSDave Kleikamp 3676617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3677617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 36789c3013e9SJan Kara if (IS_ERR(handle)) { 36799c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 36809c3013e9SJan Kara dquot_release(dquot); 3681ac27a0ecSDave Kleikamp return PTR_ERR(handle); 36829c3013e9SJan Kara } 3683ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3684617ba13bSMingming Cao err = ext4_journal_stop(handle); 3685ac27a0ecSDave Kleikamp if (!ret) 3686ac27a0ecSDave Kleikamp ret = err; 3687ac27a0ecSDave Kleikamp return ret; 3688ac27a0ecSDave Kleikamp } 3689ac27a0ecSDave Kleikamp 3690617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3691ac27a0ecSDave Kleikamp { 36922c8be6b2SJan Kara /* Are we journaling quotas? */ 3693617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3694617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3695ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3696617ba13bSMingming Cao return ext4_write_dquot(dquot); 3697ac27a0ecSDave Kleikamp } else { 3698ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3699ac27a0ecSDave Kleikamp } 3700ac27a0ecSDave Kleikamp } 3701ac27a0ecSDave Kleikamp 3702617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3703ac27a0ecSDave Kleikamp { 3704ac27a0ecSDave Kleikamp int ret, err; 3705ac27a0ecSDave Kleikamp handle_t *handle; 3706ac27a0ecSDave Kleikamp 3707ac27a0ecSDave Kleikamp /* Data block + inode block */ 3708617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3709ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3710ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3711ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3712617ba13bSMingming Cao err = ext4_journal_stop(handle); 3713ac27a0ecSDave Kleikamp if (!ret) 3714ac27a0ecSDave Kleikamp ret = err; 3715ac27a0ecSDave Kleikamp return ret; 3716ac27a0ecSDave Kleikamp } 3717ac27a0ecSDave Kleikamp 3718ac27a0ecSDave Kleikamp /* 3719ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3720ac27a0ecSDave Kleikamp * the quota file and such... 3721ac27a0ecSDave Kleikamp */ 3722617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3723ac27a0ecSDave Kleikamp { 3724617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3725617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3726ac27a0ecSDave Kleikamp } 3727ac27a0ecSDave Kleikamp 3728ac27a0ecSDave Kleikamp /* 3729ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3730ac27a0ecSDave Kleikamp */ 3731617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 37328264613dSAl Viro char *name, int remount) 3733ac27a0ecSDave Kleikamp { 3734ac27a0ecSDave Kleikamp int err; 37358264613dSAl Viro struct path path; 3736ac27a0ecSDave Kleikamp 3737ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3738ac27a0ecSDave Kleikamp return -EINVAL; 37398264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 37400623543bSJan Kara if (remount) 37418264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 37420623543bSJan Kara 37438264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3744ac27a0ecSDave Kleikamp if (err) 3745ac27a0ecSDave Kleikamp return err; 37460623543bSJan Kara 3747ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 37488264613dSAl Viro if (path.mnt->mnt_sb != sb) { 37498264613dSAl Viro path_put(&path); 3750ac27a0ecSDave Kleikamp return -EXDEV; 3751ac27a0ecSDave Kleikamp } 37520623543bSJan Kara /* Journaling quota? */ 37530623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 37542b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 37558264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3756ac27a0ecSDave Kleikamp printk(KERN_WARNING 3757617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 37580623543bSJan Kara "Journaled quota will not work.\n"); 37590623543bSJan Kara } 37600623543bSJan Kara 37610623543bSJan Kara /* 37620623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 37630623543bSJan Kara * all updates to the file when we bypass pagecache... 37640623543bSJan Kara */ 37650390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 37660390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 37670623543bSJan Kara /* 37680623543bSJan Kara * We don't need to lock updates but journal_flush() could 37690623543bSJan Kara * otherwise be livelocked... 37700623543bSJan Kara */ 37710623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 37727ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 37730623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 37747ffe1ea8SHidehiro Kawai if (err) { 37758264613dSAl Viro path_put(&path); 37767ffe1ea8SHidehiro Kawai return err; 37777ffe1ea8SHidehiro Kawai } 37780623543bSJan Kara } 37790623543bSJan Kara 37808264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 37818264613dSAl Viro path_put(&path); 378277e69dacSAl Viro return err; 3783ac27a0ecSDave Kleikamp } 3784ac27a0ecSDave Kleikamp 3785ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3786ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3787ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3788ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3789617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3790ac27a0ecSDave Kleikamp size_t len, loff_t off) 3791ac27a0ecSDave Kleikamp { 3792ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3793725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3794ac27a0ecSDave Kleikamp int err = 0; 3795ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3796ac27a0ecSDave Kleikamp int tocopy; 3797ac27a0ecSDave Kleikamp size_t toread; 3798ac27a0ecSDave Kleikamp struct buffer_head *bh; 3799ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3800ac27a0ecSDave Kleikamp 3801ac27a0ecSDave Kleikamp if (off > i_size) 3802ac27a0ecSDave Kleikamp return 0; 3803ac27a0ecSDave Kleikamp if (off+len > i_size) 3804ac27a0ecSDave Kleikamp len = i_size-off; 3805ac27a0ecSDave Kleikamp toread = len; 3806ac27a0ecSDave Kleikamp while (toread > 0) { 3807ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3808ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3809617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3810ac27a0ecSDave Kleikamp if (err) 3811ac27a0ecSDave Kleikamp return err; 3812ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3813ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3814ac27a0ecSDave Kleikamp else 3815ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3816ac27a0ecSDave Kleikamp brelse(bh); 3817ac27a0ecSDave Kleikamp offset = 0; 3818ac27a0ecSDave Kleikamp toread -= tocopy; 3819ac27a0ecSDave Kleikamp data += tocopy; 3820ac27a0ecSDave Kleikamp blk++; 3821ac27a0ecSDave Kleikamp } 3822ac27a0ecSDave Kleikamp return len; 3823ac27a0ecSDave Kleikamp } 3824ac27a0ecSDave Kleikamp 3825ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3826ac27a0ecSDave Kleikamp * enough credits) */ 3827617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3828ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3829ac27a0ecSDave Kleikamp { 3830ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3831725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3832ac27a0ecSDave Kleikamp int err = 0; 3833ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3834ac27a0ecSDave Kleikamp int tocopy; 3835617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3836ac27a0ecSDave Kleikamp size_t towrite = len; 3837ac27a0ecSDave Kleikamp struct buffer_head *bh; 3838ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3839ac27a0ecSDave Kleikamp 38400390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 3841e5f8eab8STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" 38429c3013e9SJan Kara " cancelled because transaction is not started.\n", 38439c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 38449c3013e9SJan Kara return -EIO; 38459c3013e9SJan Kara } 3846ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3847ac27a0ecSDave Kleikamp while (towrite > 0) { 3848ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3849ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3850617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3851ac27a0ecSDave Kleikamp if (!bh) 3852ac27a0ecSDave Kleikamp goto out; 3853ac27a0ecSDave Kleikamp if (journal_quota) { 3854617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3855ac27a0ecSDave Kleikamp if (err) { 3856ac27a0ecSDave Kleikamp brelse(bh); 3857ac27a0ecSDave Kleikamp goto out; 3858ac27a0ecSDave Kleikamp } 3859ac27a0ecSDave Kleikamp } 3860ac27a0ecSDave Kleikamp lock_buffer(bh); 3861ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3862ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3863ac27a0ecSDave Kleikamp unlock_buffer(bh); 3864ac27a0ecSDave Kleikamp if (journal_quota) 38650390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 3866ac27a0ecSDave Kleikamp else { 3867ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3868678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3869ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3870ac27a0ecSDave Kleikamp } 3871ac27a0ecSDave Kleikamp brelse(bh); 3872ac27a0ecSDave Kleikamp if (err) 3873ac27a0ecSDave Kleikamp goto out; 3874ac27a0ecSDave Kleikamp offset = 0; 3875ac27a0ecSDave Kleikamp towrite -= tocopy; 3876ac27a0ecSDave Kleikamp data += tocopy; 3877ac27a0ecSDave Kleikamp blk++; 3878ac27a0ecSDave Kleikamp } 3879ac27a0ecSDave Kleikamp out: 38804d04e4fbSJan Kara if (len == towrite) { 38814d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3882ac27a0ecSDave Kleikamp return err; 38834d04e4fbSJan Kara } 3884ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3885ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3886617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3887ac27a0ecSDave Kleikamp } 3888ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3889617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3890ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3891ac27a0ecSDave Kleikamp return len - towrite; 3892ac27a0ecSDave Kleikamp } 3893ac27a0ecSDave Kleikamp 3894ac27a0ecSDave Kleikamp #endif 3895ac27a0ecSDave Kleikamp 3896617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 3897ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 3898ac27a0ecSDave Kleikamp { 3899617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3900ac27a0ecSDave Kleikamp } 3901ac27a0ecSDave Kleikamp 390203010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 3903ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 390403010a33STheodore Ts'o .name = "ext4", 3905617ba13bSMingming Cao .get_sb = ext4_get_sb, 3906ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3907ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3908ac27a0ecSDave Kleikamp }; 3909ac27a0ecSDave Kleikamp 391003010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 391103010a33STheodore Ts'o static int ext4dev_get_sb(struct file_system_type *fs_type, 391203010a33STheodore Ts'o int flags, const char *dev_name, void *data, struct vfsmount *mnt) 391303010a33STheodore Ts'o { 391403010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Update your userspace programs " 391503010a33STheodore Ts'o "to mount using ext4\n"); 391603010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " 391703010a33STheodore Ts'o "will go away by 2.6.31\n"); 391803010a33STheodore Ts'o return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 391903010a33STheodore Ts'o } 392003010a33STheodore Ts'o 392103010a33STheodore Ts'o static struct file_system_type ext4dev_fs_type = { 392203010a33STheodore Ts'o .owner = THIS_MODULE, 392303010a33STheodore Ts'o .name = "ext4dev", 392403010a33STheodore Ts'o .get_sb = ext4dev_get_sb, 392503010a33STheodore Ts'o .kill_sb = kill_block_super, 392603010a33STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 392703010a33STheodore Ts'o }; 392803010a33STheodore Ts'o MODULE_ALIAS("ext4dev"); 392903010a33STheodore Ts'o #endif 393003010a33STheodore Ts'o 3931617ba13bSMingming Cao static int __init init_ext4_fs(void) 3932ac27a0ecSDave Kleikamp { 3933c9de560dSAlex Tomas int err; 3934c9de560dSAlex Tomas 39353197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 39363197ebdbSTheodore Ts'o if (!ext4_kset) 39373197ebdbSTheodore Ts'o return -ENOMEM; 39389f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 3939c9de560dSAlex Tomas err = init_ext4_mballoc(); 3940ac27a0ecSDave Kleikamp if (err) 3941ac27a0ecSDave Kleikamp return err; 3942c9de560dSAlex Tomas 3943c9de560dSAlex Tomas err = init_ext4_xattr(); 3944c9de560dSAlex Tomas if (err) 3945c9de560dSAlex Tomas goto out2; 3946ac27a0ecSDave Kleikamp err = init_inodecache(); 3947ac27a0ecSDave Kleikamp if (err) 3948ac27a0ecSDave Kleikamp goto out1; 394903010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 3950ac27a0ecSDave Kleikamp if (err) 3951ac27a0ecSDave Kleikamp goto out; 395203010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 395303010a33STheodore Ts'o err = register_filesystem(&ext4dev_fs_type); 395403010a33STheodore Ts'o if (err) { 395503010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 395603010a33STheodore Ts'o goto out; 395703010a33STheodore Ts'o } 395803010a33STheodore Ts'o #endif 3959ac27a0ecSDave Kleikamp return 0; 3960ac27a0ecSDave Kleikamp out: 3961ac27a0ecSDave Kleikamp destroy_inodecache(); 3962ac27a0ecSDave Kleikamp out1: 3963617ba13bSMingming Cao exit_ext4_xattr(); 3964c9de560dSAlex Tomas out2: 3965c9de560dSAlex Tomas exit_ext4_mballoc(); 3966ac27a0ecSDave Kleikamp return err; 3967ac27a0ecSDave Kleikamp } 3968ac27a0ecSDave Kleikamp 3969617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 3970ac27a0ecSDave Kleikamp { 397103010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 397203010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 3973617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 397403010a33STheodore Ts'o #endif 3975ac27a0ecSDave Kleikamp destroy_inodecache(); 3976617ba13bSMingming Cao exit_ext4_xattr(); 3977c9de560dSAlex Tomas exit_ext4_mballoc(); 39789f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 39793197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 3980ac27a0ecSDave Kleikamp } 3981ac27a0ecSDave Kleikamp 3982ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 398383982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 3984ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 3985617ba13bSMingming Cao module_init(init_ext4_fs) 3986617ba13bSMingming Cao module_exit(exit_ext4_fs) 3987