1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23dab291afSMingming Cao #include <linux/jbd2.h> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 27ac27a0ecSDave Kleikamp #include <linux/parser.h> 28ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 371330593eSVignesh Babu #include <linux/log2.h> 38717d50e4SAndreas Dilger #include <linux/crc16.h> 39ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 40ac27a0ecSDave Kleikamp 413dcf5451SChristoph Hellwig #include "ext4.h" 423dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 43ac27a0ecSDave Kleikamp #include "xattr.h" 44ac27a0ecSDave Kleikamp #include "acl.h" 45ac27a0ecSDave Kleikamp #include "namei.h" 46717d50e4SAndreas Dilger #include "group.h" 47ac27a0ecSDave Kleikamp 48617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 49ac27a0ecSDave Kleikamp unsigned long journal_devnum); 50617ba13bSMingming Cao static int ext4_create_journal(struct super_block *, struct ext4_super_block *, 51ac27a0ecSDave Kleikamp unsigned int); 52617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 53617ba13bSMingming Cao struct ext4_super_block * es, 54ac27a0ecSDave Kleikamp int sync); 55617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 56617ba13bSMingming Cao struct ext4_super_block * es); 57617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 58617ba13bSMingming Cao struct ext4_super_block * es); 59617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 60617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 61ac27a0ecSDave Kleikamp char nbuf[16]); 62617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data); 63617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf); 64617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb); 65617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb); 66617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb); 67ac27a0ecSDave Kleikamp 68bd81d8eeSLaurent Vivier 698fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 708fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 71bd81d8eeSLaurent Vivier { 723a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 738fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 748fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 75bd81d8eeSLaurent Vivier } 76bd81d8eeSLaurent Vivier 778fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 788fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 79bd81d8eeSLaurent Vivier { 805272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 818fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 828fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 83bd81d8eeSLaurent Vivier } 84bd81d8eeSLaurent Vivier 858fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 868fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 87bd81d8eeSLaurent Vivier { 885272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 898fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 908fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 91bd81d8eeSLaurent Vivier } 92bd81d8eeSLaurent Vivier 938fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 948fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 95bd81d8eeSLaurent Vivier { 963a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 978fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 988fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 99bd81d8eeSLaurent Vivier } 100bd81d8eeSLaurent Vivier 1018fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1028fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 103bd81d8eeSLaurent Vivier { 1045272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1058fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1068fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 107bd81d8eeSLaurent Vivier } 108bd81d8eeSLaurent Vivier 1098fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1108fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 111bd81d8eeSLaurent Vivier { 1125272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1138fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1148fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 115bd81d8eeSLaurent Vivier } 116bd81d8eeSLaurent Vivier 117ac27a0ecSDave Kleikamp /* 118dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 119ac27a0ecSDave Kleikamp * 120ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 121ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 122ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 123ac27a0ecSDave Kleikamp * appropriate. 124ac27a0ecSDave Kleikamp */ 125617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 126ac27a0ecSDave Kleikamp { 127ac27a0ecSDave Kleikamp journal_t *journal; 128ac27a0ecSDave Kleikamp 129ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 130ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 131ac27a0ecSDave Kleikamp 132ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 133ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 134ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 135617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 136ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 13746e665e9SHarvey Harrison ext4_abort(sb, __func__, 138ac27a0ecSDave Kleikamp "Detected aborted journal"); 139ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 140ac27a0ecSDave Kleikamp } 141ac27a0ecSDave Kleikamp 142dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 143ac27a0ecSDave Kleikamp } 144ac27a0ecSDave Kleikamp 145ac27a0ecSDave Kleikamp /* 146ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 147dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 148ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 149ac27a0ecSDave Kleikamp * appropriate. 150ac27a0ecSDave Kleikamp */ 151617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 152ac27a0ecSDave Kleikamp { 153ac27a0ecSDave Kleikamp struct super_block *sb; 154ac27a0ecSDave Kleikamp int err; 155ac27a0ecSDave Kleikamp int rc; 156ac27a0ecSDave Kleikamp 157ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 158ac27a0ecSDave Kleikamp err = handle->h_err; 159dab291afSMingming Cao rc = jbd2_journal_stop(handle); 160ac27a0ecSDave Kleikamp 161ac27a0ecSDave Kleikamp if (!err) 162ac27a0ecSDave Kleikamp err = rc; 163ac27a0ecSDave Kleikamp if (err) 164617ba13bSMingming Cao __ext4_std_error(sb, where, err); 165ac27a0ecSDave Kleikamp return err; 166ac27a0ecSDave Kleikamp } 167ac27a0ecSDave Kleikamp 168617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 169ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 170ac27a0ecSDave Kleikamp { 171ac27a0ecSDave Kleikamp char nbuf[16]; 172617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 173ac27a0ecSDave Kleikamp 174ac27a0ecSDave Kleikamp if (bh) 175ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 176ac27a0ecSDave Kleikamp 177ac27a0ecSDave Kleikamp if (!handle->h_err) 178ac27a0ecSDave Kleikamp handle->h_err = err; 179ac27a0ecSDave Kleikamp 180ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 181ac27a0ecSDave Kleikamp return; 182ac27a0ecSDave Kleikamp 183ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 184ac27a0ecSDave Kleikamp caller, errstr, err_fn); 185ac27a0ecSDave Kleikamp 186dab291afSMingming Cao jbd2_journal_abort_handle(handle); 187ac27a0ecSDave Kleikamp } 188ac27a0ecSDave Kleikamp 189ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 190ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 191ac27a0ecSDave Kleikamp * 192ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 193617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 194ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 195ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 196ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 197ac27a0ecSDave Kleikamp * write out the superblock safely. 198ac27a0ecSDave Kleikamp * 199dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 200ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 201ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 202ac27a0ecSDave Kleikamp */ 203ac27a0ecSDave Kleikamp 204617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 205ac27a0ecSDave Kleikamp { 206617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 207ac27a0ecSDave Kleikamp 208617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 209617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 210ac27a0ecSDave Kleikamp 211ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 212ac27a0ecSDave Kleikamp return; 213ac27a0ecSDave Kleikamp 214ac27a0ecSDave Kleikamp if (!test_opt (sb, ERRORS_CONT)) { 215617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 216ac27a0ecSDave Kleikamp 217617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 218ac27a0ecSDave Kleikamp if (journal) 219dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 220ac27a0ecSDave Kleikamp } 221ac27a0ecSDave Kleikamp if (test_opt (sb, ERRORS_RO)) { 222ac27a0ecSDave Kleikamp printk (KERN_CRIT "Remounting filesystem read-only\n"); 223ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 224ac27a0ecSDave Kleikamp } 225617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 226ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 227617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 228ac27a0ecSDave Kleikamp sb->s_id); 229ac27a0ecSDave Kleikamp } 230ac27a0ecSDave Kleikamp 231617ba13bSMingming Cao void ext4_error (struct super_block * sb, const char * function, 232ac27a0ecSDave Kleikamp const char * fmt, ...) 233ac27a0ecSDave Kleikamp { 234ac27a0ecSDave Kleikamp va_list args; 235ac27a0ecSDave Kleikamp 236ac27a0ecSDave Kleikamp va_start(args, fmt); 237617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 238ac27a0ecSDave Kleikamp vprintk(fmt, args); 239ac27a0ecSDave Kleikamp printk("\n"); 240ac27a0ecSDave Kleikamp va_end(args); 241ac27a0ecSDave Kleikamp 242617ba13bSMingming Cao ext4_handle_error(sb); 243ac27a0ecSDave Kleikamp } 244ac27a0ecSDave Kleikamp 245617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 246ac27a0ecSDave Kleikamp char nbuf[16]) 247ac27a0ecSDave Kleikamp { 248ac27a0ecSDave Kleikamp char *errstr = NULL; 249ac27a0ecSDave Kleikamp 250ac27a0ecSDave Kleikamp switch (errno) { 251ac27a0ecSDave Kleikamp case -EIO: 252ac27a0ecSDave Kleikamp errstr = "IO failure"; 253ac27a0ecSDave Kleikamp break; 254ac27a0ecSDave Kleikamp case -ENOMEM: 255ac27a0ecSDave Kleikamp errstr = "Out of memory"; 256ac27a0ecSDave Kleikamp break; 257ac27a0ecSDave Kleikamp case -EROFS: 258dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 259ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 260ac27a0ecSDave Kleikamp else 261ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 262ac27a0ecSDave Kleikamp break; 263ac27a0ecSDave Kleikamp default: 264ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 265ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 266ac27a0ecSDave Kleikamp * NULL. */ 267ac27a0ecSDave Kleikamp if (nbuf) { 268ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 269ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 270ac27a0ecSDave Kleikamp errstr = nbuf; 271ac27a0ecSDave Kleikamp } 272ac27a0ecSDave Kleikamp break; 273ac27a0ecSDave Kleikamp } 274ac27a0ecSDave Kleikamp 275ac27a0ecSDave Kleikamp return errstr; 276ac27a0ecSDave Kleikamp } 277ac27a0ecSDave Kleikamp 278617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 279ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 280ac27a0ecSDave Kleikamp 281617ba13bSMingming Cao void __ext4_std_error (struct super_block * sb, const char * function, 282ac27a0ecSDave Kleikamp int errno) 283ac27a0ecSDave Kleikamp { 284ac27a0ecSDave Kleikamp char nbuf[16]; 285ac27a0ecSDave Kleikamp const char *errstr; 286ac27a0ecSDave Kleikamp 287ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 288ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 289ac27a0ecSDave Kleikamp * an error. */ 290ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 291ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 292ac27a0ecSDave Kleikamp return; 293ac27a0ecSDave Kleikamp 294617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 295617ba13bSMingming Cao printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 296ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 297ac27a0ecSDave Kleikamp 298617ba13bSMingming Cao ext4_handle_error(sb); 299ac27a0ecSDave Kleikamp } 300ac27a0ecSDave Kleikamp 301ac27a0ecSDave Kleikamp /* 302617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 303ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 304ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 305ac27a0ecSDave Kleikamp * 306ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 307ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 308ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 309ac27a0ecSDave Kleikamp */ 310ac27a0ecSDave Kleikamp 311617ba13bSMingming Cao void ext4_abort (struct super_block * sb, const char * function, 312ac27a0ecSDave Kleikamp const char * fmt, ...) 313ac27a0ecSDave Kleikamp { 314ac27a0ecSDave Kleikamp va_list args; 315ac27a0ecSDave Kleikamp 316617ba13bSMingming Cao printk (KERN_CRIT "ext4_abort called.\n"); 317ac27a0ecSDave Kleikamp 318ac27a0ecSDave Kleikamp va_start(args, fmt); 319617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 320ac27a0ecSDave Kleikamp vprintk(fmt, args); 321ac27a0ecSDave Kleikamp printk("\n"); 322ac27a0ecSDave Kleikamp va_end(args); 323ac27a0ecSDave Kleikamp 324ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 325617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 326ac27a0ecSDave Kleikamp 327ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 328ac27a0ecSDave Kleikamp return; 329ac27a0ecSDave Kleikamp 330ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 331617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 332ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 333617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 334dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 335ac27a0ecSDave Kleikamp } 336ac27a0ecSDave Kleikamp 337617ba13bSMingming Cao void ext4_warning (struct super_block * sb, const char * function, 338ac27a0ecSDave Kleikamp const char * fmt, ...) 339ac27a0ecSDave Kleikamp { 340ac27a0ecSDave Kleikamp va_list args; 341ac27a0ecSDave Kleikamp 342ac27a0ecSDave Kleikamp va_start(args, fmt); 343617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 344ac27a0ecSDave Kleikamp sb->s_id, function); 345ac27a0ecSDave Kleikamp vprintk(fmt, args); 346ac27a0ecSDave Kleikamp printk("\n"); 347ac27a0ecSDave Kleikamp va_end(args); 348ac27a0ecSDave Kleikamp } 349ac27a0ecSDave Kleikamp 350617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 351ac27a0ecSDave Kleikamp { 352617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 353ac27a0ecSDave Kleikamp 354617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 355ac27a0ecSDave Kleikamp return; 356ac27a0ecSDave Kleikamp 35746e665e9SHarvey Harrison ext4_warning(sb, __func__, 358ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 359ac27a0ecSDave Kleikamp "running e2fsck is recommended", 360617ba13bSMingming Cao EXT4_DYNAMIC_REV); 361ac27a0ecSDave Kleikamp 362617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 363617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 364617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 365ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 366ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 367ac27a0ecSDave Kleikamp 368ac27a0ecSDave Kleikamp /* 369ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 370ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 371ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 372ac27a0ecSDave Kleikamp */ 373ac27a0ecSDave Kleikamp } 374ac27a0ecSDave Kleikamp 37599e6f829SAneesh Kumar K.V int ext4_update_compat_feature(handle_t *handle, 37699e6f829SAneesh Kumar K.V struct super_block *sb, __u32 compat) 37799e6f829SAneesh Kumar K.V { 37899e6f829SAneesh Kumar K.V int err = 0; 37999e6f829SAneesh Kumar K.V if (!EXT4_HAS_COMPAT_FEATURE(sb, compat)) { 38099e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 38199e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 38299e6f829SAneesh Kumar K.V if (err) 38399e6f829SAneesh Kumar K.V return err; 38499e6f829SAneesh Kumar K.V EXT4_SET_COMPAT_FEATURE(sb, compat); 38599e6f829SAneesh Kumar K.V sb->s_dirt = 1; 38699e6f829SAneesh Kumar K.V handle->h_sync = 1; 38799e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 38899e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 38999e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 39099e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 39199e6f829SAneesh Kumar K.V } 39299e6f829SAneesh Kumar K.V return err; 39399e6f829SAneesh Kumar K.V } 39499e6f829SAneesh Kumar K.V 39599e6f829SAneesh Kumar K.V int ext4_update_rocompat_feature(handle_t *handle, 39699e6f829SAneesh Kumar K.V struct super_block *sb, __u32 rocompat) 39799e6f829SAneesh Kumar K.V { 39899e6f829SAneesh Kumar K.V int err = 0; 39999e6f829SAneesh Kumar K.V if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, rocompat)) { 40099e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 40199e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 40299e6f829SAneesh Kumar K.V if (err) 40399e6f829SAneesh Kumar K.V return err; 40499e6f829SAneesh Kumar K.V EXT4_SET_RO_COMPAT_FEATURE(sb, rocompat); 40599e6f829SAneesh Kumar K.V sb->s_dirt = 1; 40699e6f829SAneesh Kumar K.V handle->h_sync = 1; 40799e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 40899e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 40999e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 41099e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 41199e6f829SAneesh Kumar K.V } 41299e6f829SAneesh Kumar K.V return err; 41399e6f829SAneesh Kumar K.V } 41499e6f829SAneesh Kumar K.V 41599e6f829SAneesh Kumar K.V int ext4_update_incompat_feature(handle_t *handle, 41699e6f829SAneesh Kumar K.V struct super_block *sb, __u32 incompat) 41799e6f829SAneesh Kumar K.V { 41899e6f829SAneesh Kumar K.V int err = 0; 41999e6f829SAneesh Kumar K.V if (!EXT4_HAS_INCOMPAT_FEATURE(sb, incompat)) { 42099e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 42199e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 42299e6f829SAneesh Kumar K.V if (err) 42399e6f829SAneesh Kumar K.V return err; 42499e6f829SAneesh Kumar K.V EXT4_SET_INCOMPAT_FEATURE(sb, incompat); 42599e6f829SAneesh Kumar K.V sb->s_dirt = 1; 42699e6f829SAneesh Kumar K.V handle->h_sync = 1; 42799e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 42899e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 42999e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 43099e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 43199e6f829SAneesh Kumar K.V } 43299e6f829SAneesh Kumar K.V return err; 43399e6f829SAneesh Kumar K.V } 43499e6f829SAneesh Kumar K.V 435ac27a0ecSDave Kleikamp /* 436ac27a0ecSDave Kleikamp * Open the external journal device 437ac27a0ecSDave Kleikamp */ 438617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 439ac27a0ecSDave Kleikamp { 440ac27a0ecSDave Kleikamp struct block_device *bdev; 441ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 442ac27a0ecSDave Kleikamp 443ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 444ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 445ac27a0ecSDave Kleikamp goto fail; 446ac27a0ecSDave Kleikamp return bdev; 447ac27a0ecSDave Kleikamp 448ac27a0ecSDave Kleikamp fail: 449617ba13bSMingming Cao printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", 450ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 451ac27a0ecSDave Kleikamp return NULL; 452ac27a0ecSDave Kleikamp } 453ac27a0ecSDave Kleikamp 454ac27a0ecSDave Kleikamp /* 455ac27a0ecSDave Kleikamp * Release the journal device 456ac27a0ecSDave Kleikamp */ 457617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 458ac27a0ecSDave Kleikamp { 459ac27a0ecSDave Kleikamp bd_release(bdev); 460ac27a0ecSDave Kleikamp return blkdev_put(bdev); 461ac27a0ecSDave Kleikamp } 462ac27a0ecSDave Kleikamp 463617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 464ac27a0ecSDave Kleikamp { 465ac27a0ecSDave Kleikamp struct block_device *bdev; 466ac27a0ecSDave Kleikamp int ret = -ENODEV; 467ac27a0ecSDave Kleikamp 468ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 469ac27a0ecSDave Kleikamp if (bdev) { 470617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 471ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 472ac27a0ecSDave Kleikamp } 473ac27a0ecSDave Kleikamp return ret; 474ac27a0ecSDave Kleikamp } 475ac27a0ecSDave Kleikamp 476ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 477ac27a0ecSDave Kleikamp { 478617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 479ac27a0ecSDave Kleikamp } 480ac27a0ecSDave Kleikamp 481617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 482ac27a0ecSDave Kleikamp { 483ac27a0ecSDave Kleikamp struct list_head *l; 484ac27a0ecSDave Kleikamp 485ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 486ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 487ac27a0ecSDave Kleikamp 488ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 489ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 490ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 491ac27a0ecSDave Kleikamp printk(KERN_ERR " " 492ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 493ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 494ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 495ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 496ac27a0ecSDave Kleikamp } 497ac27a0ecSDave Kleikamp } 498ac27a0ecSDave Kleikamp 499617ba13bSMingming Cao static void ext4_put_super (struct super_block * sb) 500ac27a0ecSDave Kleikamp { 501617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 502617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 503ac27a0ecSDave Kleikamp int i; 504ac27a0ecSDave Kleikamp 505c9de560dSAlex Tomas ext4_mb_release(sb); 506a86c6181SAlex Tomas ext4_ext_release(sb); 507617ba13bSMingming Cao ext4_xattr_put_super(sb); 508dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 509ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 510617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 511ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 512ac27a0ecSDave Kleikamp BUFFER_TRACE(sbi->s_sbh, "marking dirty"); 513ac27a0ecSDave Kleikamp mark_buffer_dirty(sbi->s_sbh); 514617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 515ac27a0ecSDave Kleikamp } 516ac27a0ecSDave Kleikamp 517ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 518ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 519ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 520ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 521ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 522ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 523ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 524ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 525ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 526ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 527ac27a0ecSDave Kleikamp #endif 528ac27a0ecSDave Kleikamp 529ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 530ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 531ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 532ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 533ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 534ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 535ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 536ac27a0ecSDave Kleikamp 537f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 538ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 539ac27a0ecSDave Kleikamp /* 540ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 541ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 542ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 543ac27a0ecSDave Kleikamp */ 544ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 545f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 546617ba13bSMingming Cao ext4_blkdev_remove(sbi); 547ac27a0ecSDave Kleikamp } 548ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 549ac27a0ecSDave Kleikamp kfree(sbi); 550ac27a0ecSDave Kleikamp return; 551ac27a0ecSDave Kleikamp } 552ac27a0ecSDave Kleikamp 553e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 554ac27a0ecSDave Kleikamp 555ac27a0ecSDave Kleikamp /* 556ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 557ac27a0ecSDave Kleikamp */ 558617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 559ac27a0ecSDave Kleikamp { 560617ba13bSMingming Cao struct ext4_inode_info *ei; 561ac27a0ecSDave Kleikamp 562e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 563ac27a0ecSDave Kleikamp if (!ei) 564ac27a0ecSDave Kleikamp return NULL; 565617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 566617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 567617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 568ac27a0ecSDave Kleikamp #endif 569ac27a0ecSDave Kleikamp ei->i_block_alloc_info = NULL; 570ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 571a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 572c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 573c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 574ac27a0ecSDave Kleikamp return &ei->vfs_inode; 575ac27a0ecSDave Kleikamp } 576ac27a0ecSDave Kleikamp 577617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 578ac27a0ecSDave Kleikamp { 5799f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 5809f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 5819f7dd93dSVasily Averin EXT4_I(inode)); 5829f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 5839f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 5849f7dd93dSVasily Averin true); 5859f7dd93dSVasily Averin dump_stack(); 5869f7dd93dSVasily Averin } 587617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 588ac27a0ecSDave Kleikamp } 589ac27a0ecSDave Kleikamp 5904ba9b9d0SChristoph Lameter static void init_once(struct kmem_cache *cachep, void *foo) 591ac27a0ecSDave Kleikamp { 592617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 593ac27a0ecSDave Kleikamp 594ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 595617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 596ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 597ac27a0ecSDave Kleikamp #endif 5980e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 599ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 600ac27a0ecSDave Kleikamp } 601ac27a0ecSDave Kleikamp 602ac27a0ecSDave Kleikamp static int init_inodecache(void) 603ac27a0ecSDave Kleikamp { 604617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 605617ba13bSMingming Cao sizeof(struct ext4_inode_info), 606ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 607ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 60820c2df83SPaul Mundt init_once); 609617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 610ac27a0ecSDave Kleikamp return -ENOMEM; 611ac27a0ecSDave Kleikamp return 0; 612ac27a0ecSDave Kleikamp } 613ac27a0ecSDave Kleikamp 614ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 615ac27a0ecSDave Kleikamp { 616617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 617ac27a0ecSDave Kleikamp } 618ac27a0ecSDave Kleikamp 619617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 620ac27a0ecSDave Kleikamp { 621617ba13bSMingming Cao struct ext4_block_alloc_info *rsv = EXT4_I(inode)->i_block_alloc_info; 622617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 623617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 624617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 625617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 626617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 627ac27a0ecSDave Kleikamp } 628617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 629617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 630617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 631617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 632ac27a0ecSDave Kleikamp } 633ac27a0ecSDave Kleikamp #endif 634617ba13bSMingming Cao ext4_discard_reservation(inode); 635617ba13bSMingming Cao EXT4_I(inode)->i_block_alloc_info = NULL; 636ac27a0ecSDave Kleikamp if (unlikely(rsv)) 637ac27a0ecSDave Kleikamp kfree(rsv); 638ac27a0ecSDave Kleikamp } 639ac27a0ecSDave Kleikamp 640617ba13bSMingming Cao static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb) 641ac27a0ecSDave Kleikamp { 642ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 643617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 644ac27a0ecSDave Kleikamp 645ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 646ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 647ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); 648ac27a0ecSDave Kleikamp 649ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 650ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 651ac27a0ecSDave Kleikamp 652ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 653ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 654ac27a0ecSDave Kleikamp 655617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 656ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 657ac27a0ecSDave Kleikamp 658617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 659ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 660ac27a0ecSDave Kleikamp #endif 661ac27a0ecSDave Kleikamp } 662ac27a0ecSDave Kleikamp 663d9c9bef1SMiklos Szeredi /* 664d9c9bef1SMiklos Szeredi * Show an option if 665d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 666d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 667d9c9bef1SMiklos Szeredi */ 668617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 669ac27a0ecSDave Kleikamp { 670aa22df2cSAneesh Kumar K.V int def_errors; 671aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 672ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 673d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 674d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 675d9c9bef1SMiklos Szeredi 676d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 677aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 678d9c9bef1SMiklos Szeredi 679d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 680d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 681d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 682d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 683aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 684d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 685d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 686d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 687d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 688d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 689d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 690d9c9bef1SMiklos Szeredi } 691d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 692d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 693d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 694d9c9bef1SMiklos Szeredi } 695bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 696d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 697bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 698d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 699bb4f397aSAneesh Kumar K.V } 700bb4f397aSAneesh Kumar K.V } 701aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 702bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 703aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 704d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 705aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 706d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 707aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 708d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 709d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 710d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 71107620f69SAdrian Bunk #ifdef CONFIG_EXT4DEV_FS_XATTR 712aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 713aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 714d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 715d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 716d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 717d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 718d9c9bef1SMiklos Szeredi } 719d9c9bef1SMiklos Szeredi #endif 72007620f69SAdrian Bunk #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 721aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 722d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 723d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 724d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 725d9c9bef1SMiklos Szeredi #endif 726d9c9bef1SMiklos Szeredi if (!test_opt(sb, RESERVATION)) 727d9c9bef1SMiklos Szeredi seq_puts(seq, ",noreservation"); 728d9c9bef1SMiklos Szeredi if (sbi->s_commit_interval) { 729d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 730d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 731d9c9bef1SMiklos Szeredi } 732d9c9bef1SMiklos Szeredi if (test_opt(sb, BARRIER)) 733d9c9bef1SMiklos Szeredi seq_puts(seq, ",barrier=1"); 734d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 735d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 736d9c9bef1SMiklos Szeredi if (!test_opt(sb, EXTENTS)) 737d9c9bef1SMiklos Szeredi seq_puts(seq, ",noextents"); 7383dbd0edeSAneesh Kumar K.V if (!test_opt(sb, MBALLOC)) 7393dbd0edeSAneesh Kumar K.V seq_puts(seq, ",nomballoc"); 74025ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 74125ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 742ac27a0ecSDave Kleikamp 743cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 744cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 745aa22df2cSAneesh Kumar K.V /* 746aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 747aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 748aa22df2cSAneesh Kumar K.V */ 749617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 750ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 751617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 752ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 753617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 754ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 755ac27a0ecSDave Kleikamp 756617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 757ac27a0ecSDave Kleikamp return 0; 758ac27a0ecSDave Kleikamp } 759ac27a0ecSDave Kleikamp 760ac27a0ecSDave Kleikamp 7611b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 7621b961ac0SChristoph Hellwig u64 ino, u32 generation) 763ac27a0ecSDave Kleikamp { 764ac27a0ecSDave Kleikamp struct inode *inode; 765ac27a0ecSDave Kleikamp 766617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 767ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 768617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 769ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 770ac27a0ecSDave Kleikamp 771ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 772ac27a0ecSDave Kleikamp * 773617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 774ac27a0ecSDave Kleikamp * deleted, so we should be safe. 775ac27a0ecSDave Kleikamp * 776ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 777ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 778ac27a0ecSDave Kleikamp */ 7791d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 7801d1fe1eeSDavid Howells if (IS_ERR(inode)) 7811d1fe1eeSDavid Howells return ERR_CAST(inode); 7821d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 783ac27a0ecSDave Kleikamp iput(inode); 784ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 785ac27a0ecSDave Kleikamp } 7861b961ac0SChristoph Hellwig 7871b961ac0SChristoph Hellwig return inode; 788ac27a0ecSDave Kleikamp } 7891b961ac0SChristoph Hellwig 7901b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 7911b961ac0SChristoph Hellwig int fh_len, int fh_type) 7921b961ac0SChristoph Hellwig { 7931b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 7941b961ac0SChristoph Hellwig ext4_nfs_get_inode); 7951b961ac0SChristoph Hellwig } 7961b961ac0SChristoph Hellwig 7971b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 7981b961ac0SChristoph Hellwig int fh_len, int fh_type) 7991b961ac0SChristoph Hellwig { 8001b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 8011b961ac0SChristoph Hellwig ext4_nfs_get_inode); 802ac27a0ecSDave Kleikamp } 803ac27a0ecSDave Kleikamp 804ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 805ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 806ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 807ac27a0ecSDave Kleikamp 808617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type); 809617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode); 810617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 811617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 812617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 813617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 814617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 8156f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 8166f28e087SJan Kara char *path, int remount); 817617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 818617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 819ac27a0ecSDave Kleikamp size_t len, loff_t off); 820617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 821ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 822ac27a0ecSDave Kleikamp 823617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 824617ba13bSMingming Cao .initialize = ext4_dquot_initialize, 825617ba13bSMingming Cao .drop = ext4_dquot_drop, 826ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 827ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 828ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 829ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 830ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 831617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 832617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 833617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 834617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 835617ba13bSMingming Cao .write_info = ext4_write_info 836ac27a0ecSDave Kleikamp }; 837ac27a0ecSDave Kleikamp 838617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 839617ba13bSMingming Cao .quota_on = ext4_quota_on, 840ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 841ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 842ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 843ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 844ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 845ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 846ac27a0ecSDave Kleikamp }; 847ac27a0ecSDave Kleikamp #endif 848ac27a0ecSDave Kleikamp 849ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 850617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 851617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 852617ba13bSMingming Cao .write_inode = ext4_write_inode, 853617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 854617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 855617ba13bSMingming Cao .put_super = ext4_put_super, 856617ba13bSMingming Cao .write_super = ext4_write_super, 857617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 858617ba13bSMingming Cao .write_super_lockfs = ext4_write_super_lockfs, 859617ba13bSMingming Cao .unlockfs = ext4_unlockfs, 860617ba13bSMingming Cao .statfs = ext4_statfs, 861617ba13bSMingming Cao .remount_fs = ext4_remount, 862617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 863617ba13bSMingming Cao .show_options = ext4_show_options, 864ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 865617ba13bSMingming Cao .quota_read = ext4_quota_read, 866617ba13bSMingming Cao .quota_write = ext4_quota_write, 867ac27a0ecSDave Kleikamp #endif 868ac27a0ecSDave Kleikamp }; 869ac27a0ecSDave Kleikamp 87039655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 8711b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 8721b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 873617ba13bSMingming Cao .get_parent = ext4_get_parent, 874ac27a0ecSDave Kleikamp }; 875ac27a0ecSDave Kleikamp 876ac27a0ecSDave Kleikamp enum { 877ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 878ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 879ac27a0ecSDave Kleikamp Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, 880ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 881ac27a0ecSDave Kleikamp Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 882ac27a0ecSDave Kleikamp Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, 883818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 884ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 885ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 886ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 887ac27a0ecSDave Kleikamp Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 88825ec56b5SJean Noel Cordenner Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, 889c9de560dSAlex Tomas Opt_mballoc, Opt_nomballoc, Opt_stripe, 890ac27a0ecSDave Kleikamp }; 891ac27a0ecSDave Kleikamp 892ac27a0ecSDave Kleikamp static match_table_t tokens = { 893ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 894ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 895ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 896ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 897ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 898ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 899ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 900ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 901ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 902ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 903ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 904ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 905ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 906ac27a0ecSDave Kleikamp {Opt_nocheck, "nocheck"}, 907ac27a0ecSDave Kleikamp {Opt_nocheck, "check=none"}, 908ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 909ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 910ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 911ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 912ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 913ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 914ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 915ac27a0ecSDave Kleikamp {Opt_reservation, "reservation"}, 916ac27a0ecSDave Kleikamp {Opt_noreservation, "noreservation"}, 917ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 918ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 919ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 920ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 921ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 922ac27a0ecSDave Kleikamp {Opt_journal_inum, "journal=%u"}, 923ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 924818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 925818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 926ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 927ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 928ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 929ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 930ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 931ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 932ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 933ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 934ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 935ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 936ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 937ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 938ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 939ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 940ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 941a86c6181SAlex Tomas {Opt_extents, "extents"}, 9421e2462f9SMingming Cao {Opt_noextents, "noextents"}, 94325ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 944c9de560dSAlex Tomas {Opt_mballoc, "mballoc"}, 945c9de560dSAlex Tomas {Opt_nomballoc, "nomballoc"}, 946c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 947ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 948f3f12faaSJosef Bacik {Opt_err, NULL}, 949ac27a0ecSDave Kleikamp }; 950ac27a0ecSDave Kleikamp 951617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 952ac27a0ecSDave Kleikamp { 953617ba13bSMingming Cao ext4_fsblk_t sb_block; 954ac27a0ecSDave Kleikamp char *options = (char *) *data; 955ac27a0ecSDave Kleikamp 956ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 957ac27a0ecSDave Kleikamp return 1; /* Default location */ 958ac27a0ecSDave Kleikamp options += 3; 959617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 960ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 961ac27a0ecSDave Kleikamp if (*options && *options != ',') { 962617ba13bSMingming Cao printk("EXT4-fs: Invalid sb specification: %s\n", 963ac27a0ecSDave Kleikamp (char *) *data); 964ac27a0ecSDave Kleikamp return 1; 965ac27a0ecSDave Kleikamp } 966ac27a0ecSDave Kleikamp if (*options == ',') 967ac27a0ecSDave Kleikamp options++; 968ac27a0ecSDave Kleikamp *data = (void *) options; 969ac27a0ecSDave Kleikamp return sb_block; 970ac27a0ecSDave Kleikamp } 971ac27a0ecSDave Kleikamp 972ac27a0ecSDave Kleikamp static int parse_options (char *options, struct super_block *sb, 973ac27a0ecSDave Kleikamp unsigned int *inum, unsigned long *journal_devnum, 974617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 975ac27a0ecSDave Kleikamp { 976617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 977ac27a0ecSDave Kleikamp char * p; 978ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 979ac27a0ecSDave Kleikamp int data_opt = 0; 980ac27a0ecSDave Kleikamp int option; 981ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 982*dfc5d03fSJan Kara int qtype, qfmt; 983ac27a0ecSDave Kleikamp char *qname; 984ac27a0ecSDave Kleikamp #endif 985ac27a0ecSDave Kleikamp 986ac27a0ecSDave Kleikamp if (!options) 987ac27a0ecSDave Kleikamp return 1; 988ac27a0ecSDave Kleikamp 989ac27a0ecSDave Kleikamp while ((p = strsep (&options, ",")) != NULL) { 990ac27a0ecSDave Kleikamp int token; 991ac27a0ecSDave Kleikamp if (!*p) 992ac27a0ecSDave Kleikamp continue; 993ac27a0ecSDave Kleikamp 994ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 995ac27a0ecSDave Kleikamp switch (token) { 996ac27a0ecSDave Kleikamp case Opt_bsd_df: 997ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, MINIX_DF); 998ac27a0ecSDave Kleikamp break; 999ac27a0ecSDave Kleikamp case Opt_minix_df: 1000ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, MINIX_DF); 1001ac27a0ecSDave Kleikamp break; 1002ac27a0ecSDave Kleikamp case Opt_grpid: 1003ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, GRPID); 1004ac27a0ecSDave Kleikamp break; 1005ac27a0ecSDave Kleikamp case Opt_nogrpid: 1006ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, GRPID); 1007ac27a0ecSDave Kleikamp break; 1008ac27a0ecSDave Kleikamp case Opt_resuid: 1009ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1010ac27a0ecSDave Kleikamp return 0; 1011ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1012ac27a0ecSDave Kleikamp break; 1013ac27a0ecSDave Kleikamp case Opt_resgid: 1014ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1015ac27a0ecSDave Kleikamp return 0; 1016ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1017ac27a0ecSDave Kleikamp break; 1018ac27a0ecSDave Kleikamp case Opt_sb: 1019ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1020ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1021ac27a0ecSDave Kleikamp break; 1022ac27a0ecSDave Kleikamp case Opt_err_panic: 1023ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 1024ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 1025ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_PANIC); 1026ac27a0ecSDave Kleikamp break; 1027ac27a0ecSDave Kleikamp case Opt_err_ro: 1028ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 1029ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 1030ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_RO); 1031ac27a0ecSDave Kleikamp break; 1032ac27a0ecSDave Kleikamp case Opt_err_cont: 1033ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 1034ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 1035ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_CONT); 1036ac27a0ecSDave Kleikamp break; 1037ac27a0ecSDave Kleikamp case Opt_nouid32: 1038ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NO_UID32); 1039ac27a0ecSDave Kleikamp break; 1040ac27a0ecSDave Kleikamp case Opt_nocheck: 1041ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, CHECK); 1042ac27a0ecSDave Kleikamp break; 1043ac27a0ecSDave Kleikamp case Opt_debug: 1044ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, DEBUG); 1045ac27a0ecSDave Kleikamp break; 1046ac27a0ecSDave Kleikamp case Opt_oldalloc: 1047ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, OLDALLOC); 1048ac27a0ecSDave Kleikamp break; 1049ac27a0ecSDave Kleikamp case Opt_orlov: 1050ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, OLDALLOC); 1051ac27a0ecSDave Kleikamp break; 1052617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 1053ac27a0ecSDave Kleikamp case Opt_user_xattr: 1054ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, XATTR_USER); 1055ac27a0ecSDave Kleikamp break; 1056ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1057ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, XATTR_USER); 1058ac27a0ecSDave Kleikamp break; 1059ac27a0ecSDave Kleikamp #else 1060ac27a0ecSDave Kleikamp case Opt_user_xattr: 1061ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1062617ba13bSMingming Cao printk("EXT4 (no)user_xattr options not supported\n"); 1063ac27a0ecSDave Kleikamp break; 1064ac27a0ecSDave Kleikamp #endif 1065617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 1066ac27a0ecSDave Kleikamp case Opt_acl: 1067ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1068ac27a0ecSDave Kleikamp break; 1069ac27a0ecSDave Kleikamp case Opt_noacl: 1070ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1071ac27a0ecSDave Kleikamp break; 1072ac27a0ecSDave Kleikamp #else 1073ac27a0ecSDave Kleikamp case Opt_acl: 1074ac27a0ecSDave Kleikamp case Opt_noacl: 1075617ba13bSMingming Cao printk("EXT4 (no)acl options not supported\n"); 1076ac27a0ecSDave Kleikamp break; 1077ac27a0ecSDave Kleikamp #endif 1078ac27a0ecSDave Kleikamp case Opt_reservation: 1079ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1080ac27a0ecSDave Kleikamp break; 1081ac27a0ecSDave Kleikamp case Opt_noreservation: 1082ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, RESERVATION); 1083ac27a0ecSDave Kleikamp break; 1084ac27a0ecSDave Kleikamp case Opt_journal_update: 1085ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1086ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1087ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1088ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1089ac27a0ecSDave Kleikamp journal file. */ 1090ac27a0ecSDave Kleikamp if (is_remount) { 1091617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1092ac27a0ecSDave Kleikamp "journal on remount\n"); 1093ac27a0ecSDave Kleikamp return 0; 1094ac27a0ecSDave Kleikamp } 1095ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); 1096ac27a0ecSDave Kleikamp break; 1097ac27a0ecSDave Kleikamp case Opt_journal_inum: 1098ac27a0ecSDave Kleikamp if (is_remount) { 1099617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1100ac27a0ecSDave Kleikamp "journal on remount\n"); 1101ac27a0ecSDave Kleikamp return 0; 1102ac27a0ecSDave Kleikamp } 1103ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1104ac27a0ecSDave Kleikamp return 0; 1105ac27a0ecSDave Kleikamp *inum = option; 1106ac27a0ecSDave Kleikamp break; 1107ac27a0ecSDave Kleikamp case Opt_journal_dev: 1108ac27a0ecSDave Kleikamp if (is_remount) { 1109617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1110ac27a0ecSDave Kleikamp "journal on remount\n"); 1111ac27a0ecSDave Kleikamp return 0; 1112ac27a0ecSDave Kleikamp } 1113ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1114ac27a0ecSDave Kleikamp return 0; 1115ac27a0ecSDave Kleikamp *journal_devnum = option; 1116ac27a0ecSDave Kleikamp break; 1117818d276cSGirish Shilamkar case Opt_journal_checksum: 1118818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1119818d276cSGirish Shilamkar break; 1120818d276cSGirish Shilamkar case Opt_journal_async_commit: 1121818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1122818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1123818d276cSGirish Shilamkar break; 1124ac27a0ecSDave Kleikamp case Opt_noload: 1125ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NOLOAD); 1126ac27a0ecSDave Kleikamp break; 1127ac27a0ecSDave Kleikamp case Opt_commit: 1128ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1129ac27a0ecSDave Kleikamp return 0; 1130ac27a0ecSDave Kleikamp if (option < 0) 1131ac27a0ecSDave Kleikamp return 0; 1132ac27a0ecSDave Kleikamp if (option == 0) 1133cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1134ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1135ac27a0ecSDave Kleikamp break; 1136ac27a0ecSDave Kleikamp case Opt_data_journal: 1137617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1138ac27a0ecSDave Kleikamp goto datacheck; 1139ac27a0ecSDave Kleikamp case Opt_data_ordered: 1140617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1141ac27a0ecSDave Kleikamp goto datacheck; 1142ac27a0ecSDave Kleikamp case Opt_data_writeback: 1143617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1144ac27a0ecSDave Kleikamp datacheck: 1145ac27a0ecSDave Kleikamp if (is_remount) { 1146617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1147ac27a0ecSDave Kleikamp != data_opt) { 1148ac27a0ecSDave Kleikamp printk(KERN_ERR 1149617ba13bSMingming Cao "EXT4-fs: cannot change data " 1150ac27a0ecSDave Kleikamp "mode on remount\n"); 1151ac27a0ecSDave Kleikamp return 0; 1152ac27a0ecSDave Kleikamp } 1153ac27a0ecSDave Kleikamp } else { 1154617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1155ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1156ac27a0ecSDave Kleikamp } 1157ac27a0ecSDave Kleikamp break; 1158ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1159ac27a0ecSDave Kleikamp case Opt_usrjquota: 1160ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1161ac27a0ecSDave Kleikamp goto set_qf_name; 1162ac27a0ecSDave Kleikamp case Opt_grpjquota: 1163ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1164ac27a0ecSDave Kleikamp set_qf_name: 1165*dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1166*dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1167*dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1168ac27a0ecSDave Kleikamp printk(KERN_ERR 1169617ba13bSMingming Cao "EXT4-fs: Cannot change journalled " 1170ac27a0ecSDave Kleikamp "quota options when quota turned on.\n"); 1171ac27a0ecSDave Kleikamp return 0; 1172ac27a0ecSDave Kleikamp } 1173ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1174ac27a0ecSDave Kleikamp if (!qname) { 1175ac27a0ecSDave Kleikamp printk(KERN_ERR 1176617ba13bSMingming Cao "EXT4-fs: not enough memory for " 1177ac27a0ecSDave Kleikamp "storing quotafile name.\n"); 1178ac27a0ecSDave Kleikamp return 0; 1179ac27a0ecSDave Kleikamp } 1180ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1181ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1182ac27a0ecSDave Kleikamp printk(KERN_ERR 1183617ba13bSMingming Cao "EXT4-fs: %s quota file already " 1184ac27a0ecSDave Kleikamp "specified.\n", QTYPE2NAME(qtype)); 1185ac27a0ecSDave Kleikamp kfree(qname); 1186ac27a0ecSDave Kleikamp return 0; 1187ac27a0ecSDave Kleikamp } 1188ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1189ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1190ac27a0ecSDave Kleikamp printk(KERN_ERR 1191617ba13bSMingming Cao "EXT4-fs: quotafile must be on " 1192ac27a0ecSDave Kleikamp "filesystem root.\n"); 1193ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1194ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1195ac27a0ecSDave Kleikamp return 0; 1196ac27a0ecSDave Kleikamp } 1197ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1198ac27a0ecSDave Kleikamp break; 1199ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1200ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1201ac27a0ecSDave Kleikamp goto clear_qf_name; 1202ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1203ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1204ac27a0ecSDave Kleikamp clear_qf_name: 1205*dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1206*dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1207*dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1208617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 1209ac27a0ecSDave Kleikamp "journalled quota options when " 1210ac27a0ecSDave Kleikamp "quota turned on.\n"); 1211ac27a0ecSDave Kleikamp return 0; 1212ac27a0ecSDave Kleikamp } 1213ac27a0ecSDave Kleikamp /* 1214ac27a0ecSDave Kleikamp * The space will be released later when all options 1215ac27a0ecSDave Kleikamp * are confirmed to be correct 1216ac27a0ecSDave Kleikamp */ 1217ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1218ac27a0ecSDave Kleikamp break; 1219ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1220*dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1221*dfc5d03fSJan Kara goto set_qf_format; 1222ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1223*dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1224*dfc5d03fSJan Kara set_qf_format: 1225*dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1226*dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1227*dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1228*dfc5d03fSJan Kara printk(KERN_ERR "EXT4-fs: Cannot change " 1229*dfc5d03fSJan Kara "journaled quota options when " 1230*dfc5d03fSJan Kara "quota turned on.\n"); 1231*dfc5d03fSJan Kara return 0; 1232*dfc5d03fSJan Kara } 1233*dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1234ac27a0ecSDave Kleikamp break; 1235ac27a0ecSDave Kleikamp case Opt_quota: 1236ac27a0ecSDave Kleikamp case Opt_usrquota: 1237ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1238ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1239ac27a0ecSDave Kleikamp break; 1240ac27a0ecSDave Kleikamp case Opt_grpquota: 1241ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1242ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1243ac27a0ecSDave Kleikamp break; 1244ac27a0ecSDave Kleikamp case Opt_noquota: 1245ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1246617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1247ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1248ac27a0ecSDave Kleikamp return 0; 1249ac27a0ecSDave Kleikamp } 1250ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1251ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1252ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1253ac27a0ecSDave Kleikamp break; 1254ac27a0ecSDave Kleikamp #else 1255ac27a0ecSDave Kleikamp case Opt_quota: 1256ac27a0ecSDave Kleikamp case Opt_usrquota: 1257ac27a0ecSDave Kleikamp case Opt_grpquota: 1258ac27a0ecSDave Kleikamp case Opt_usrjquota: 1259ac27a0ecSDave Kleikamp case Opt_grpjquota: 1260ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1261ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1262ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1263ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1264ac27a0ecSDave Kleikamp printk(KERN_ERR 1265617ba13bSMingming Cao "EXT4-fs: journalled quota options not " 1266ac27a0ecSDave Kleikamp "supported.\n"); 1267ac27a0ecSDave Kleikamp break; 1268ac27a0ecSDave Kleikamp case Opt_noquota: 1269ac27a0ecSDave Kleikamp break; 1270ac27a0ecSDave Kleikamp #endif 1271ac27a0ecSDave Kleikamp case Opt_abort: 1272ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1273ac27a0ecSDave Kleikamp break; 1274ac27a0ecSDave Kleikamp case Opt_barrier: 1275ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1276ac27a0ecSDave Kleikamp return 0; 1277ac27a0ecSDave Kleikamp if (option) 1278ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1279ac27a0ecSDave Kleikamp else 1280ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1281ac27a0ecSDave Kleikamp break; 1282ac27a0ecSDave Kleikamp case Opt_ignore: 1283ac27a0ecSDave Kleikamp break; 1284ac27a0ecSDave Kleikamp case Opt_resize: 1285ac27a0ecSDave Kleikamp if (!is_remount) { 1286617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1287ac27a0ecSDave Kleikamp "for remount\n"); 1288ac27a0ecSDave Kleikamp return 0; 1289ac27a0ecSDave Kleikamp } 1290ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1291ac27a0ecSDave Kleikamp return 0; 1292ac27a0ecSDave Kleikamp *n_blocks_count = option; 1293ac27a0ecSDave Kleikamp break; 1294ac27a0ecSDave Kleikamp case Opt_nobh: 1295ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1296ac27a0ecSDave Kleikamp break; 1297ac27a0ecSDave Kleikamp case Opt_bh: 1298ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1299ac27a0ecSDave Kleikamp break; 1300a86c6181SAlex Tomas case Opt_extents: 1301a86c6181SAlex Tomas set_opt (sbi->s_mount_opt, EXTENTS); 1302a86c6181SAlex Tomas break; 13031e2462f9SMingming Cao case Opt_noextents: 13041e2462f9SMingming Cao clear_opt (sbi->s_mount_opt, EXTENTS); 13051e2462f9SMingming Cao break; 130625ec56b5SJean Noel Cordenner case Opt_i_version: 130725ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 130825ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 130925ec56b5SJean Noel Cordenner break; 1310c9de560dSAlex Tomas case Opt_mballoc: 1311c9de560dSAlex Tomas set_opt(sbi->s_mount_opt, MBALLOC); 1312c9de560dSAlex Tomas break; 1313c9de560dSAlex Tomas case Opt_nomballoc: 1314c9de560dSAlex Tomas clear_opt(sbi->s_mount_opt, MBALLOC); 1315c9de560dSAlex Tomas break; 1316c9de560dSAlex Tomas case Opt_stripe: 1317c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1318c9de560dSAlex Tomas return 0; 1319c9de560dSAlex Tomas if (option < 0) 1320c9de560dSAlex Tomas return 0; 1321c9de560dSAlex Tomas sbi->s_stripe = option; 1322c9de560dSAlex Tomas break; 1323ac27a0ecSDave Kleikamp default: 1324ac27a0ecSDave Kleikamp printk (KERN_ERR 1325617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1326ac27a0ecSDave Kleikamp "or missing value\n", p); 1327ac27a0ecSDave Kleikamp return 0; 1328ac27a0ecSDave Kleikamp } 1329ac27a0ecSDave Kleikamp } 1330ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1331ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1332617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1333ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1334ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1335ac27a0ecSDave Kleikamp 1336617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1337ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1338ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1339ac27a0ecSDave Kleikamp 1340ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1341617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1342ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1343617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1344617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1345ac27a0ecSDave Kleikamp "format mixing.\n"); 1346ac27a0ecSDave Kleikamp return 0; 1347ac27a0ecSDave Kleikamp } 1348ac27a0ecSDave Kleikamp 1349ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1350617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journalled quota format " 1351ac27a0ecSDave Kleikamp "not specified.\n"); 1352ac27a0ecSDave Kleikamp return 0; 1353ac27a0ecSDave Kleikamp } 1354ac27a0ecSDave Kleikamp } else { 1355ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1356617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journalled quota format " 1357ac27a0ecSDave Kleikamp "specified with no journalling " 1358ac27a0ecSDave Kleikamp "enabled.\n"); 1359ac27a0ecSDave Kleikamp return 0; 1360ac27a0ecSDave Kleikamp } 1361ac27a0ecSDave Kleikamp } 1362ac27a0ecSDave Kleikamp #endif 1363ac27a0ecSDave Kleikamp return 1; 1364ac27a0ecSDave Kleikamp } 1365ac27a0ecSDave Kleikamp 1366617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1367ac27a0ecSDave Kleikamp int read_only) 1368ac27a0ecSDave Kleikamp { 1369617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1370ac27a0ecSDave Kleikamp int res = 0; 1371ac27a0ecSDave Kleikamp 1372617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1373617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs warning: revision level too high, " 1374ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1375ac27a0ecSDave Kleikamp res = MS_RDONLY; 1376ac27a0ecSDave Kleikamp } 1377ac27a0ecSDave Kleikamp if (read_only) 1378ac27a0ecSDave Kleikamp return res; 1379617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1380617ba13bSMingming Cao printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1381ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1382617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1383ac27a0ecSDave Kleikamp printk (KERN_WARNING 1384617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1385ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1386ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1387ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1388ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1389ac27a0ecSDave Kleikamp printk (KERN_WARNING 1390617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1391ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1392ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1393ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1394ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1395ac27a0ecSDave Kleikamp printk (KERN_WARNING 1396617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1397ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1398ac27a0ecSDave Kleikamp #if 0 1399ac27a0ecSDave Kleikamp /* @@@ We _will_ want to clear the valid bit if we find 140063f57933SAndrew Morton * inconsistencies, to force a fsck at reboot. But for 140163f57933SAndrew Morton * a plain journaled filesystem we can keep it set as 140263f57933SAndrew Morton * valid forever! :) 140363f57933SAndrew Morton */ 1404216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1405ac27a0ecSDave Kleikamp #endif 1406ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1407617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1408e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1409ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1410617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 1411617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1412ac27a0ecSDave Kleikamp 1413617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1414ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1415617ba13bSMingming Cao printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " 1416ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1417ac27a0ecSDave Kleikamp sb->s_blocksize, 1418ac27a0ecSDave Kleikamp sbi->s_groups_count, 1419617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1420617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1421ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1422ac27a0ecSDave Kleikamp 1423617ba13bSMingming Cao printk(KERN_INFO "EXT4 FS on %s, ", sb->s_id); 1424617ba13bSMingming Cao if (EXT4_SB(sb)->s_journal->j_inode == NULL) { 1425ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 1426ac27a0ecSDave Kleikamp 1427ac27a0ecSDave Kleikamp printk("external journal on %s\n", 1428617ba13bSMingming Cao bdevname(EXT4_SB(sb)->s_journal->j_dev, b)); 1429ac27a0ecSDave Kleikamp } else { 1430ac27a0ecSDave Kleikamp printk("internal journal\n"); 1431ac27a0ecSDave Kleikamp } 1432ac27a0ecSDave Kleikamp return res; 1433ac27a0ecSDave Kleikamp } 1434ac27a0ecSDave Kleikamp 1435717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1436717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1437717d50e4SAndreas Dilger { 1438717d50e4SAndreas Dilger __u16 crc = 0; 1439717d50e4SAndreas Dilger 1440717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1441717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1442717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1443717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1444717d50e4SAndreas Dilger 1445717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1446717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1447717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1448717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1449717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1450717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1451717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1452717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1453717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1454717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1455717d50e4SAndreas Dilger offset); 1456717d50e4SAndreas Dilger } 1457717d50e4SAndreas Dilger 1458717d50e4SAndreas Dilger return cpu_to_le16(crc); 1459717d50e4SAndreas Dilger } 1460717d50e4SAndreas Dilger 1461717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1462717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1463717d50e4SAndreas Dilger { 1464717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1465717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1466717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1467717d50e4SAndreas Dilger return 0; 1468717d50e4SAndreas Dilger 1469717d50e4SAndreas Dilger return 1; 1470717d50e4SAndreas Dilger } 1471717d50e4SAndreas Dilger 1472ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1473617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1474ac27a0ecSDave Kleikamp { 1475617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1476617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1477617ba13bSMingming Cao ext4_fsblk_t last_block; 1478bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1479bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1480bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1481ce421581SJose R. Santos int flexbg_flag = 0; 1482fd2d4291SAvantika Mathur ext4_group_t i; 1483ac27a0ecSDave Kleikamp 1484ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1485ce421581SJose R. Santos flexbg_flag = 1; 1486ce421581SJose R. Santos 1487617ba13bSMingming Cao ext4_debug ("Checking group descriptors"); 1488ac27a0ecSDave Kleikamp 1489197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1490197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1491197cd65aSAkinobu Mita 1492ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1493bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1494ac27a0ecSDave Kleikamp else 1495ac27a0ecSDave Kleikamp last_block = first_block + 1496617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1497ac27a0ecSDave Kleikamp 14988fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 1499bd81d8eeSLaurent Vivier if (block_bitmap < first_block || block_bitmap > last_block) 1500ac27a0ecSDave Kleikamp { 1501c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1502c19204b0SJosef Bacik "Block bitmap for group %lu not in group " 1503c19204b0SJosef Bacik "(block %llu)!", i, block_bitmap); 1504ac27a0ecSDave Kleikamp return 0; 1505ac27a0ecSDave Kleikamp } 15068fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 1507bd81d8eeSLaurent Vivier if (inode_bitmap < first_block || inode_bitmap > last_block) 1508ac27a0ecSDave Kleikamp { 1509c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1510c19204b0SJosef Bacik "Inode bitmap for group %lu not in group " 1511c19204b0SJosef Bacik "(block %llu)!", i, inode_bitmap); 1512ac27a0ecSDave Kleikamp return 0; 1513ac27a0ecSDave Kleikamp } 15148fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1515bd81d8eeSLaurent Vivier if (inode_table < first_block || 1516780dcdb2SEric Sandeen inode_table + sbi->s_itb_per_group - 1 > last_block) 1517ac27a0ecSDave Kleikamp { 1518c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1519c19204b0SJosef Bacik "Inode table for group %lu not in group " 1520c19204b0SJosef Bacik "(block %llu)!", i, inode_table); 1521ac27a0ecSDave Kleikamp return 0; 1522ac27a0ecSDave Kleikamp } 1523717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1524c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1525fd2d4291SAvantika Mathur "Checksum for group %lu failed (%u!=%u)\n", 1526fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1527fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 1528717d50e4SAndreas Dilger return 0; 1529717d50e4SAndreas Dilger } 1530ce421581SJose R. Santos if (!flexbg_flag) 1531617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1532ac27a0ecSDave Kleikamp } 1533ac27a0ecSDave Kleikamp 1534bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1535617ba13bSMingming Cao sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb)); 1536ac27a0ecSDave Kleikamp return 1; 1537ac27a0ecSDave Kleikamp } 1538ac27a0ecSDave Kleikamp 1539617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1540ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1541ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1542ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1543ac27a0ecSDave Kleikamp * 1544ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1545ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1546ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1547ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1548ac27a0ecSDave Kleikamp * 1549ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1550ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1551ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1552617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1553ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1554ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1555ac27a0ecSDave Kleikamp */ 1556617ba13bSMingming Cao static void ext4_orphan_cleanup (struct super_block * sb, 1557617ba13bSMingming Cao struct ext4_super_block * es) 1558ac27a0ecSDave Kleikamp { 1559ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1560ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1561ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1562ac27a0ecSDave Kleikamp int i; 1563ac27a0ecSDave Kleikamp #endif 1564ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1565ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1566ac27a0ecSDave Kleikamp return; 1567ac27a0ecSDave Kleikamp } 1568ac27a0ecSDave Kleikamp 1569a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1570a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1571a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1572a8f48a95SEric Sandeen return; 1573a8f48a95SEric Sandeen } 1574a8f48a95SEric Sandeen 1575617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1576ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1577ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1578ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1579ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1580ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1581ac27a0ecSDave Kleikamp return; 1582ac27a0ecSDave Kleikamp } 1583ac27a0ecSDave Kleikamp 1584ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1585617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1586ac27a0ecSDave Kleikamp sb->s_id); 1587ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1588ac27a0ecSDave Kleikamp } 1589ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1590ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1591ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1592ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1593ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1594617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1595617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1596ac27a0ecSDave Kleikamp if (ret < 0) 1597ac27a0ecSDave Kleikamp printk(KERN_ERR 1598617ba13bSMingming Cao "EXT4-fs: Cannot turn on journalled " 1599ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1600ac27a0ecSDave Kleikamp } 1601ac27a0ecSDave Kleikamp } 1602ac27a0ecSDave Kleikamp #endif 1603ac27a0ecSDave Kleikamp 1604ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1605ac27a0ecSDave Kleikamp struct inode *inode; 1606ac27a0ecSDave Kleikamp 160797bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 160897bd42b9SJosef Bacik if (IS_ERR(inode)) { 1609ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1610ac27a0ecSDave Kleikamp break; 1611ac27a0ecSDave Kleikamp } 1612ac27a0ecSDave Kleikamp 1613617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1614ac27a0ecSDave Kleikamp DQUOT_INIT(inode); 1615ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1616ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1617ac27a0ecSDave Kleikamp "%s: truncating inode %lu to %Ld bytes\n", 161846e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1619ac27a0ecSDave Kleikamp jbd_debug(2, "truncating inode %lu to %Ld bytes\n", 1620ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1621617ba13bSMingming Cao ext4_truncate(inode); 1622ac27a0ecSDave Kleikamp nr_truncates++; 1623ac27a0ecSDave Kleikamp } else { 1624ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1625ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 162646e665e9SHarvey Harrison __func__, inode->i_ino); 1627ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1628ac27a0ecSDave Kleikamp inode->i_ino); 1629ac27a0ecSDave Kleikamp nr_orphans++; 1630ac27a0ecSDave Kleikamp } 1631ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1632ac27a0ecSDave Kleikamp } 1633ac27a0ecSDave Kleikamp 1634ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x)==1) ? "" : "s" 1635ac27a0ecSDave Kleikamp 1636ac27a0ecSDave Kleikamp if (nr_orphans) 1637617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1638ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1639ac27a0ecSDave Kleikamp if (nr_truncates) 1640617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1641ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1642ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1643ac27a0ecSDave Kleikamp /* Turn quotas off */ 1644ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1645ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 16466f28e087SJan Kara vfs_quota_off(sb, i, 0); 1647ac27a0ecSDave Kleikamp } 1648ac27a0ecSDave Kleikamp #endif 1649ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1650ac27a0ecSDave Kleikamp } 1651cd2291a4SEric Sandeen /* 1652cd2291a4SEric Sandeen * Maximal extent format file size. 1653cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1654cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1655cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1656cd2291a4SEric Sandeen * so that won't be a limiting factor. 1657cd2291a4SEric Sandeen * 1658cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1659cd2291a4SEric Sandeen */ 1660cd2291a4SEric Sandeen static loff_t ext4_max_size(int blkbits) 1661cd2291a4SEric Sandeen { 1662cd2291a4SEric Sandeen loff_t res; 1663cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1664cd2291a4SEric Sandeen 1665cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1666cd2291a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 1667cd2291a4SEric Sandeen /* 1668cd2291a4SEric Sandeen * CONFIG_LSF is not enabled implies the inode 1669cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1670cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1671cd2291a4SEric Sandeen */ 1672cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1673cd2291a4SEric Sandeen 1674cd2291a4SEric Sandeen /* total blocks in file system block size */ 1675cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1676cd2291a4SEric Sandeen upper_limit <<= blkbits; 1677cd2291a4SEric Sandeen } 1678cd2291a4SEric Sandeen 1679cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1680cd2291a4SEric Sandeen res = 1LL << 32; 1681cd2291a4SEric Sandeen res <<= blkbits; 1682cd2291a4SEric Sandeen res -= 1; 1683cd2291a4SEric Sandeen 1684cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1685cd2291a4SEric Sandeen if (res > upper_limit) 1686cd2291a4SEric Sandeen res = upper_limit; 1687cd2291a4SEric Sandeen 1688cd2291a4SEric Sandeen return res; 1689cd2291a4SEric Sandeen } 1690ac27a0ecSDave Kleikamp 1691ac27a0ecSDave Kleikamp /* 1692cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 16930fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 16940fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1695ac27a0ecSDave Kleikamp */ 1696cd2291a4SEric Sandeen static loff_t ext4_max_bitmap_size(int bits) 1697ac27a0ecSDave Kleikamp { 1698617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 16990fc1b451SAneesh Kumar K.V int meta_blocks; 17000fc1b451SAneesh Kumar K.V loff_t upper_limit; 17010fc1b451SAneesh Kumar K.V /* This is calculated to be the largest file size for a 1702cd2291a4SEric Sandeen * dense, bitmapped file such that the total number of 1703ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 17040fc1b451SAneesh Kumar K.V * does not exceed 2^48 -1 17050fc1b451SAneesh Kumar K.V * __u32 i_blocks_lo and _u16 i_blocks_high representing the 17060fc1b451SAneesh Kumar K.V * total number of 512 bytes blocks of the file 17070fc1b451SAneesh Kumar K.V */ 17080fc1b451SAneesh Kumar K.V 17090fc1b451SAneesh Kumar K.V if (sizeof(blkcnt_t) < sizeof(u64)) { 17100fc1b451SAneesh Kumar K.V /* 17110fc1b451SAneesh Kumar K.V * CONFIG_LSF is not enabled implies the inode 17120fc1b451SAneesh Kumar K.V * i_block represent total blocks in 512 bytes 17130fc1b451SAneesh Kumar K.V * 32 == size of vfs inode i_blocks * 8 17140fc1b451SAneesh Kumar K.V */ 17150fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 17160fc1b451SAneesh Kumar K.V 17170fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 17180fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 17190fc1b451SAneesh Kumar K.V 17200fc1b451SAneesh Kumar K.V } else { 17218180a562SAneesh Kumar K.V /* 17228180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 17238180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 17248180a562SAneesh Kumar K.V * represent total number of blocks in 17258180a562SAneesh Kumar K.V * file system block size 17268180a562SAneesh Kumar K.V */ 17270fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 17280fc1b451SAneesh Kumar K.V 17290fc1b451SAneesh Kumar K.V } 17300fc1b451SAneesh Kumar K.V 17310fc1b451SAneesh Kumar K.V /* indirect blocks */ 17320fc1b451SAneesh Kumar K.V meta_blocks = 1; 17330fc1b451SAneesh Kumar K.V /* double indirect blocks */ 17340fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 17350fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 17360fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 17370fc1b451SAneesh Kumar K.V 17380fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 17390fc1b451SAneesh Kumar K.V upper_limit <<= bits; 1740ac27a0ecSDave Kleikamp 1741ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1742ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1743ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1744ac27a0ecSDave Kleikamp res <<= bits; 1745ac27a0ecSDave Kleikamp if (res > upper_limit) 1746ac27a0ecSDave Kleikamp res = upper_limit; 17470fc1b451SAneesh Kumar K.V 17480fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 17490fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 17500fc1b451SAneesh Kumar K.V 1751ac27a0ecSDave Kleikamp return res; 1752ac27a0ecSDave Kleikamp } 1753ac27a0ecSDave Kleikamp 1754617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 175570bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1756ac27a0ecSDave Kleikamp { 1757617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1758fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 1759ac27a0ecSDave Kleikamp int has_super = 0; 1760ac27a0ecSDave Kleikamp 1761ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 1762ac27a0ecSDave Kleikamp 1763617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 1764ac27a0ecSDave Kleikamp nr < first_meta_bg) 176570bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 1766ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 1767617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 1768ac27a0ecSDave Kleikamp has_super = 1; 1769617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 1770ac27a0ecSDave Kleikamp } 1771ac27a0ecSDave Kleikamp 1772c9de560dSAlex Tomas /** 1773c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 1774c9de560dSAlex Tomas * @sbi: In memory super block info 1775c9de560dSAlex Tomas * 1776c9de560dSAlex Tomas * If we have specified it via mount option, then 1777c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 1778c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 1779c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 1780c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 1781c9de560dSAlex Tomas * 1782c9de560dSAlex Tomas */ 1783c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 1784c9de560dSAlex Tomas { 1785c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 1786c9de560dSAlex Tomas unsigned long stripe_width = 1787c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 1788c9de560dSAlex Tomas 1789c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 1790c9de560dSAlex Tomas return sbi->s_stripe; 1791c9de560dSAlex Tomas 1792c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 1793c9de560dSAlex Tomas return stripe_width; 1794c9de560dSAlex Tomas 1795c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 1796c9de560dSAlex Tomas return stride; 1797c9de560dSAlex Tomas 1798c9de560dSAlex Tomas return 0; 1799c9de560dSAlex Tomas } 1800ac27a0ecSDave Kleikamp 1801617ba13bSMingming Cao static int ext4_fill_super (struct super_block *sb, void *data, int silent) 18021d03ec98SAneesh Kumar K.V __releases(kernel_sem) 18031d03ec98SAneesh Kumar K.V __acquires(kernel_sem) 18041d03ec98SAneesh Kumar K.V 1805ac27a0ecSDave Kleikamp { 1806ac27a0ecSDave Kleikamp struct buffer_head * bh; 1807617ba13bSMingming Cao struct ext4_super_block *es = NULL; 1808617ba13bSMingming Cao struct ext4_sb_info *sbi; 1809617ba13bSMingming Cao ext4_fsblk_t block; 1810617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 181170bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 1812ac27a0ecSDave Kleikamp unsigned long offset = 0; 1813ac27a0ecSDave Kleikamp unsigned int journal_inum = 0; 1814ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 1815ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 1816ac27a0ecSDave Kleikamp struct inode *root; 18171d1fe1eeSDavid Howells int ret = -EINVAL; 1818ac27a0ecSDave Kleikamp int blocksize; 1819ac27a0ecSDave Kleikamp int db_count; 1820ac27a0ecSDave Kleikamp int i; 1821ac27a0ecSDave Kleikamp int needs_recovery; 1822ac27a0ecSDave Kleikamp __le32 features; 1823bd81d8eeSLaurent Vivier __u64 blocks_count; 1824833f4077SPeter Zijlstra int err; 1825ac27a0ecSDave Kleikamp 1826ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 1827ac27a0ecSDave Kleikamp if (!sbi) 1828ac27a0ecSDave Kleikamp return -ENOMEM; 1829ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 1830ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 1831617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 1832617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 1833d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 1834ac27a0ecSDave Kleikamp 1835ac27a0ecSDave Kleikamp unlock_kernel(); 1836ac27a0ecSDave Kleikamp 1837617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 1838ac27a0ecSDave Kleikamp if (!blocksize) { 1839617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 1840ac27a0ecSDave Kleikamp goto out_fail; 1841ac27a0ecSDave Kleikamp } 1842ac27a0ecSDave Kleikamp 1843afc7cbcaSTakashi Sato if (!sb_set_blocksize(sb, blocksize)) { 1844afc7cbcaSTakashi Sato printk(KERN_ERR "EXT4-fs: bad blocksize %d.\n", blocksize); 1845afc7cbcaSTakashi Sato goto out_fail; 1846afc7cbcaSTakashi Sato } 1847afc7cbcaSTakashi Sato 1848ac27a0ecSDave Kleikamp /* 1849617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 1850ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 1851ac27a0ecSDave Kleikamp */ 1852617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 185370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 185470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 1855ac27a0ecSDave Kleikamp } else { 185670bbb3e0SAndrew Morton logical_sb_block = sb_block; 1857ac27a0ecSDave Kleikamp } 1858ac27a0ecSDave Kleikamp 185970bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 1860617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: unable to read superblock\n"); 1861ac27a0ecSDave Kleikamp goto out_fail; 1862ac27a0ecSDave Kleikamp } 1863ac27a0ecSDave Kleikamp /* 1864ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 1865617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 1866ac27a0ecSDave Kleikamp */ 1867617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 1868ac27a0ecSDave Kleikamp sbi->s_es = es; 1869ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 1870617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 1871617ba13bSMingming Cao goto cantfind_ext4; 1872ac27a0ecSDave Kleikamp 1873ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 1874ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1875617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 1876ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1877617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 1878ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1879617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 1880ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 18812e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_XATTR 1882617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 1883ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 18842e7842b8SHugh Dickins #endif 18852e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 1886617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 1887ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 18882e7842b8SHugh Dickins #endif 1889617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 1890617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 1891617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 1892617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 1893617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 1894617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 1895ac27a0ecSDave Kleikamp 1896617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 1897ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1898bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 1899ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 1900bb4f397aSAneesh Kumar K.V else 1901bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 1902ac27a0ecSDave Kleikamp 1903ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 1904ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 1905ac27a0ecSDave Kleikamp 1906ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1907ac27a0ecSDave Kleikamp 19081e2462f9SMingming Cao /* 19091e2462f9SMingming Cao * turn on extents feature by default in ext4 filesystem 19101e2462f9SMingming Cao * User -o noextents to turn it off 19111e2462f9SMingming Cao */ 19121e2462f9SMingming Cao set_opt(sbi->s_mount_opt, EXTENTS); 19133dbd0edeSAneesh Kumar K.V /* 19143dbd0edeSAneesh Kumar K.V * turn on mballoc feature by default in ext4 filesystem 19153dbd0edeSAneesh Kumar K.V * User -o nomballoc to turn it off 19163dbd0edeSAneesh Kumar K.V */ 19173dbd0edeSAneesh Kumar K.V set_opt(sbi->s_mount_opt, MBALLOC); 19181e2462f9SMingming Cao 1919ac27a0ecSDave Kleikamp if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, 1920ac27a0ecSDave Kleikamp NULL, 0)) 1921ac27a0ecSDave Kleikamp goto failed_mount; 1922ac27a0ecSDave Kleikamp 1923ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1924617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1925ac27a0ecSDave Kleikamp 1926617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 1927617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 1928617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 1929617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 1930ac27a0ecSDave Kleikamp printk(KERN_WARNING 1931617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 1932ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1933469108ffSTheodore Tso 1934469108ffSTheodore Tso /* 1935469108ffSTheodore Tso * Since ext4 is still considered development code, we require 1936469108ffSTheodore Tso * that the TEST_FILESYS flag in s->flags be set. 1937469108ffSTheodore Tso */ 1938469108ffSTheodore Tso if (!(le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS)) { 1939469108ffSTheodore Tso printk(KERN_WARNING "EXT4-fs: %s: not marked " 1940469108ffSTheodore Tso "OK to use with test code.\n", sb->s_id); 1941469108ffSTheodore Tso goto failed_mount; 1942469108ffSTheodore Tso } 1943469108ffSTheodore Tso 1944ac27a0ecSDave Kleikamp /* 1945ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 1946ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 1947ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 1948ac27a0ecSDave Kleikamp */ 1949617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 1950ac27a0ecSDave Kleikamp if (features) { 1951617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 1952ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 1953ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 1954ac27a0ecSDave Kleikamp goto failed_mount; 1955ac27a0ecSDave Kleikamp } 1956617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 1957ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 1958617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 1959ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 1960ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 1961ac27a0ecSDave Kleikamp goto failed_mount; 1962ac27a0ecSDave Kleikamp } 19630fc1b451SAneesh Kumar K.V if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 19640fc1b451SAneesh Kumar K.V /* 19650fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 19660fc1b451SAneesh Kumar K.V * mount if kernel is build with CONFIG_LSF 19670fc1b451SAneesh Kumar K.V */ 19680fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 19690fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 19700fc1b451SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " 19710fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 19720fc1b451SAneesh Kumar K.V "without CONFIG_LSF.\n", sb->s_id); 19730fc1b451SAneesh Kumar K.V goto failed_mount; 19740fc1b451SAneesh Kumar K.V } 19750fc1b451SAneesh Kumar K.V } 1976ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 1977ac27a0ecSDave Kleikamp 1978617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 1979617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 1980ac27a0ecSDave Kleikamp printk(KERN_ERR 1981617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 1982ac27a0ecSDave Kleikamp blocksize, sb->s_id); 1983ac27a0ecSDave Kleikamp goto failed_mount; 1984ac27a0ecSDave Kleikamp } 1985ac27a0ecSDave Kleikamp 1986ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 1987ce40733cSAneesh Kumar K.V 1988ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 1989ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 1990ce40733cSAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: bad block size %d.\n", 1991ce40733cSAneesh Kumar K.V blocksize); 1992ac27a0ecSDave Kleikamp goto failed_mount; 1993ac27a0ecSDave Kleikamp } 1994ac27a0ecSDave Kleikamp 1995ac27a0ecSDave Kleikamp brelse (bh); 199670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 199770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 199870bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 1999ac27a0ecSDave Kleikamp if (!bh) { 2000ac27a0ecSDave Kleikamp printk(KERN_ERR 2001617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 2002ac27a0ecSDave Kleikamp goto failed_mount; 2003ac27a0ecSDave Kleikamp } 2004617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2005ac27a0ecSDave Kleikamp sbi->s_es = es; 2006617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2007ac27a0ecSDave Kleikamp printk (KERN_ERR 2008617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 2009ac27a0ecSDave Kleikamp goto failed_mount; 2010ac27a0ecSDave Kleikamp } 2011ac27a0ecSDave Kleikamp } 2012ac27a0ecSDave Kleikamp 2013e2b46574SEric Sandeen sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits); 2014617ba13bSMingming Cao sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits); 2015ac27a0ecSDave Kleikamp 2016617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2017617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2018617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2019ac27a0ecSDave Kleikamp } else { 2020ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2021ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2022617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 20231330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2024ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2025ac27a0ecSDave Kleikamp printk (KERN_ERR 2026617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 2027ac27a0ecSDave Kleikamp sbi->s_inode_size); 2028ac27a0ecSDave Kleikamp goto failed_mount; 2029ac27a0ecSDave Kleikamp } 2030ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2031ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2032ac27a0ecSDave Kleikamp } 20330d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 20340d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 20358fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 20360d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2037d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 20380d1ee42fSAlexandre Ratchov printk(KERN_ERR 20398fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 20400d1ee42fSAlexandre Ratchov sbi->s_desc_size); 20410d1ee42fSAlexandre Ratchov goto failed_mount; 20420d1ee42fSAlexandre Ratchov } 20430d1ee42fSAlexandre Ratchov } else 20440d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 2045ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2046ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2047b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2048617ba13bSMingming Cao goto cantfind_ext4; 2049617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2050ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2051617ba13bSMingming Cao goto cantfind_ext4; 2052ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2053ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 20540d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2055ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2056ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2057e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2058e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 2059ac27a0ecSDave Kleikamp for (i=0; i < 4; i++) 2060ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2061ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2062ac27a0ecSDave Kleikamp 2063ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2064ac27a0ecSDave Kleikamp printk (KERN_ERR 2065617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 2066ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2067ac27a0ecSDave Kleikamp goto failed_mount; 2068ac27a0ecSDave Kleikamp } 2069ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2070ac27a0ecSDave Kleikamp printk (KERN_ERR 2071617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 2072ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2073ac27a0ecSDave Kleikamp goto failed_mount; 2074ac27a0ecSDave Kleikamp } 2075ac27a0ecSDave Kleikamp 2076bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2077ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2078617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 2079ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 2080ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 2081617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 2082ac27a0ecSDave Kleikamp "enabled\n"); 2083ac27a0ecSDave Kleikamp goto failed_mount; 2084ac27a0ecSDave Kleikamp } 2085ac27a0ecSDave Kleikamp 2086617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2087617ba13bSMingming Cao goto cantfind_ext4; 2088e7c95593SEric Sandeen 2089e7c95593SEric Sandeen /* ensure blocks_count calculation below doesn't sign-extend */ 2090e7c95593SEric Sandeen if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) < 2091e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block) + 1) { 2092e7c95593SEric Sandeen printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, " 2093e7c95593SEric Sandeen "first data block %u, blocks per group %lu\n", 2094e7c95593SEric Sandeen ext4_blocks_count(es), 2095e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 2096e7c95593SEric Sandeen EXT4_BLOCKS_PER_GROUP(sb)); 2097e7c95593SEric Sandeen goto failed_mount; 2098e7c95593SEric Sandeen } 2099bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2100bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2101bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2102bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 2103bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2104617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2105617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2106ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), 2107ac27a0ecSDave Kleikamp GFP_KERNEL); 2108ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2109617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: not enough memory\n"); 2110ac27a0ecSDave Kleikamp goto failed_mount; 2111ac27a0ecSDave Kleikamp } 2112ac27a0ecSDave Kleikamp 2113ac27a0ecSDave Kleikamp bgl_lock_init(&sbi->s_blockgroup_lock); 2114ac27a0ecSDave Kleikamp 2115ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 211670bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2117ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2118ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2119617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: " 2120ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 2121ac27a0ecSDave Kleikamp db_count = i; 2122ac27a0ecSDave Kleikamp goto failed_mount2; 2123ac27a0ecSDave Kleikamp } 2124ac27a0ecSDave Kleikamp } 2125617ba13bSMingming Cao if (!ext4_check_descriptors (sb)) { 2126617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 2127ac27a0ecSDave Kleikamp goto failed_mount2; 2128ac27a0ecSDave Kleikamp } 2129ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2130ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2131ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2132ac27a0ecSDave Kleikamp 2133833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2134617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2135833f4077SPeter Zijlstra if (!err) { 2136833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2137617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2138833f4077SPeter Zijlstra } 2139833f4077SPeter Zijlstra if (!err) { 2140833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2141617ba13bSMingming Cao ext4_count_dirs(sb)); 2142833f4077SPeter Zijlstra } 2143833f4077SPeter Zijlstra if (err) { 2144833f4077SPeter Zijlstra printk(KERN_ERR "EXT4-fs: insufficient memory\n"); 2145833f4077SPeter Zijlstra goto failed_mount3; 2146833f4077SPeter Zijlstra } 2147ac27a0ecSDave Kleikamp 2148ac27a0ecSDave Kleikamp /* per fileystem reservation list head & lock */ 2149ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_rsv_window_lock); 2150ac27a0ecSDave Kleikamp sbi->s_rsv_window_root = RB_ROOT; 2151ac27a0ecSDave Kleikamp /* Add a single, static dummy reservation to the start of the 2152ac27a0ecSDave Kleikamp * reservation window list --- it gives us a placeholder for 2153ac27a0ecSDave Kleikamp * append-at-start-of-list which makes the allocation logic 2154ac27a0ecSDave Kleikamp * _much_ simpler. */ 2155617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 2156617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 2157ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_alloc_hit = 0; 2158ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_goal_size = 0; 2159617ba13bSMingming Cao ext4_rsv_window_add(sb, &sbi->s_rsv_window_head); 2160ac27a0ecSDave Kleikamp 2161c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2162c9de560dSAlex Tomas 2163ac27a0ecSDave Kleikamp /* 2164ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2165ac27a0ecSDave Kleikamp */ 2166617ba13bSMingming Cao sb->s_op = &ext4_sops; 2167617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2168617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2169ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2170617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2171617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2172ac27a0ecSDave Kleikamp #endif 2173ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 2174ac27a0ecSDave Kleikamp 2175ac27a0ecSDave Kleikamp sb->s_root = NULL; 2176ac27a0ecSDave Kleikamp 2177ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2178617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2179617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2180ac27a0ecSDave Kleikamp 2181ac27a0ecSDave Kleikamp /* 2182ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2183ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2184ac27a0ecSDave Kleikamp */ 2185ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2186617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2187617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2188ac27a0ecSDave Kleikamp goto failed_mount3; 2189ac27a0ecSDave Kleikamp } else if (journal_inum) { 2190617ba13bSMingming Cao if (ext4_create_journal(sb, es, journal_inum)) 2191ac27a0ecSDave Kleikamp goto failed_mount3; 2192ac27a0ecSDave Kleikamp } else { 2193ac27a0ecSDave Kleikamp if (!silent) 2194ac27a0ecSDave Kleikamp printk (KERN_ERR 2195617ba13bSMingming Cao "ext4: No journal on filesystem on %s\n", 2196ac27a0ecSDave Kleikamp sb->s_id); 2197ac27a0ecSDave Kleikamp goto failed_mount3; 2198ac27a0ecSDave Kleikamp } 2199ac27a0ecSDave Kleikamp 2200eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2201eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2202eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2203eb40a09cSJose R. Santos printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); 2204eb40a09cSJose R. Santos goto failed_mount4; 2205eb40a09cSJose R. Santos } 2206eb40a09cSJose R. Santos 2207818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2208818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2209818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2210818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2211818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2212818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2213818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2214818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2215818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2216818d276cSGirish Shilamkar } else { 2217818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2218818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2219818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2220818d276cSGirish Shilamkar } 2221818d276cSGirish Shilamkar 2222ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2223ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2224ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2225ac27a0ecSDave Kleikamp case 0: 2226ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 222763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 222863f57933SAndrew Morton * cope, else JOURNAL_DATA 222963f57933SAndrew Morton */ 2230dab291afSMingming Cao if (jbd2_journal_check_available_features 2231dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2232ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2233ac27a0ecSDave Kleikamp else 2234ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2235ac27a0ecSDave Kleikamp break; 2236ac27a0ecSDave Kleikamp 2237617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2238617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2239dab291afSMingming Cao if (!jbd2_journal_check_available_features 2240dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2241617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 2242ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 2243ac27a0ecSDave Kleikamp goto failed_mount4; 2244ac27a0ecSDave Kleikamp } 2245ac27a0ecSDave Kleikamp default: 2246ac27a0ecSDave Kleikamp break; 2247ac27a0ecSDave Kleikamp } 2248ac27a0ecSDave Kleikamp 2249ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2250617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2251617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 2252ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 2253ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2254ac27a0ecSDave Kleikamp } 2255ac27a0ecSDave Kleikamp } 2256ac27a0ecSDave Kleikamp /* 2257dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2258ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2259ac27a0ecSDave Kleikamp */ 2260ac27a0ecSDave Kleikamp 22611d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 22621d1fe1eeSDavid Howells if (IS_ERR(root)) { 2263617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 22641d1fe1eeSDavid Howells ret = PTR_ERR(root); 2265ac27a0ecSDave Kleikamp goto failed_mount4; 2266ac27a0ecSDave Kleikamp } 2267ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 22681d1fe1eeSDavid Howells iput(root); 2269617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 2270ac27a0ecSDave Kleikamp goto failed_mount4; 2271ac27a0ecSDave Kleikamp } 22721d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 22731d1fe1eeSDavid Howells if (!sb->s_root) { 22741d1fe1eeSDavid Howells printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); 22751d1fe1eeSDavid Howells iput(root); 22761d1fe1eeSDavid Howells ret = -ENOMEM; 22771d1fe1eeSDavid Howells goto failed_mount4; 22781d1fe1eeSDavid Howells } 2279ac27a0ecSDave Kleikamp 2280617ba13bSMingming Cao ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY); 2281ef7f3835SKalpak Shah 2282ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2283ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2284ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2285ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2286ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2287ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2288ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2289ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2290ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2291ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2292ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2293ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2294ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2295ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2296ef7f3835SKalpak Shah } 2297ef7f3835SKalpak Shah } 2298ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2299ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2300ef7f3835SKalpak Shah sbi->s_inode_size) { 2301ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2302ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2303ef7f3835SKalpak Shah printk(KERN_INFO "EXT4-fs: required extra inode space not" 2304ef7f3835SKalpak Shah "available.\n"); 2305ef7f3835SKalpak Shah } 2306ef7f3835SKalpak Shah 2307ac27a0ecSDave Kleikamp /* 2308ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 2309ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 2310ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 2311ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 2312ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 2313ac27a0ecSDave Kleikamp * superblock lock. 2314ac27a0ecSDave Kleikamp */ 2315617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2316617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2317617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 2318ac27a0ecSDave Kleikamp if (needs_recovery) 2319617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: recovery complete.\n"); 2320617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 2321617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", 2322617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": 2323617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": 2324ac27a0ecSDave Kleikamp "writeback"); 2325ac27a0ecSDave Kleikamp 2326a86c6181SAlex Tomas ext4_ext_init(sb); 2327c9de560dSAlex Tomas ext4_mb_init(sb, needs_recovery); 2328a86c6181SAlex Tomas 2329ac27a0ecSDave Kleikamp lock_kernel(); 2330ac27a0ecSDave Kleikamp return 0; 2331ac27a0ecSDave Kleikamp 2332617ba13bSMingming Cao cantfind_ext4: 2333ac27a0ecSDave Kleikamp if (!silent) 2334617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 2335ac27a0ecSDave Kleikamp sb->s_id); 2336ac27a0ecSDave Kleikamp goto failed_mount; 2337ac27a0ecSDave Kleikamp 2338ac27a0ecSDave Kleikamp failed_mount4: 2339dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 2340ac27a0ecSDave Kleikamp failed_mount3: 2341ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2342ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2343ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 2344ac27a0ecSDave Kleikamp failed_mount2: 2345ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2346ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2347ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2348ac27a0ecSDave Kleikamp failed_mount: 2349ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2350ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2351ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2352ac27a0ecSDave Kleikamp #endif 2353617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2354ac27a0ecSDave Kleikamp brelse(bh); 2355ac27a0ecSDave Kleikamp out_fail: 2356ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2357ac27a0ecSDave Kleikamp kfree(sbi); 2358ac27a0ecSDave Kleikamp lock_kernel(); 23591d1fe1eeSDavid Howells return ret; 2360ac27a0ecSDave Kleikamp } 2361ac27a0ecSDave Kleikamp 2362ac27a0ecSDave Kleikamp /* 2363ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2364ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2365ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2366ac27a0ecSDave Kleikamp */ 2367617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2368ac27a0ecSDave Kleikamp { 2369617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2370ac27a0ecSDave Kleikamp 2371ac27a0ecSDave Kleikamp if (sbi->s_commit_interval) 2372ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 2373617ba13bSMingming Cao /* We could also set up an ext4-specific default for the commit 2374ac27a0ecSDave Kleikamp * interval here, but for now we'll just fall back to the jbd 2375ac27a0ecSDave Kleikamp * default. */ 2376ac27a0ecSDave Kleikamp 2377ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2378ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2379dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2380ac27a0ecSDave Kleikamp else 2381dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 2382ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2383ac27a0ecSDave Kleikamp } 2384ac27a0ecSDave Kleikamp 2385617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2386ac27a0ecSDave Kleikamp unsigned int journal_inum) 2387ac27a0ecSDave Kleikamp { 2388ac27a0ecSDave Kleikamp struct inode *journal_inode; 2389ac27a0ecSDave Kleikamp journal_t *journal; 2390ac27a0ecSDave Kleikamp 2391ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2392ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2393ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2394ac27a0ecSDave Kleikamp 23951d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 23961d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 2397617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 2398ac27a0ecSDave Kleikamp return NULL; 2399ac27a0ecSDave Kleikamp } 2400ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2401ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2402ac27a0ecSDave Kleikamp iput(journal_inode); 2403617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 2404ac27a0ecSDave Kleikamp return NULL; 2405ac27a0ecSDave Kleikamp } 2406ac27a0ecSDave Kleikamp 2407ac27a0ecSDave Kleikamp jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", 2408ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 24091d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 2410617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 2411ac27a0ecSDave Kleikamp iput(journal_inode); 2412ac27a0ecSDave Kleikamp return NULL; 2413ac27a0ecSDave Kleikamp } 2414ac27a0ecSDave Kleikamp 2415dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2416ac27a0ecSDave Kleikamp if (!journal) { 2417617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 2418ac27a0ecSDave Kleikamp iput(journal_inode); 2419ac27a0ecSDave Kleikamp return NULL; 2420ac27a0ecSDave Kleikamp } 2421ac27a0ecSDave Kleikamp journal->j_private = sb; 2422617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2423ac27a0ecSDave Kleikamp return journal; 2424ac27a0ecSDave Kleikamp } 2425ac27a0ecSDave Kleikamp 2426617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 2427ac27a0ecSDave Kleikamp dev_t j_dev) 2428ac27a0ecSDave Kleikamp { 2429ac27a0ecSDave Kleikamp struct buffer_head * bh; 2430ac27a0ecSDave Kleikamp journal_t *journal; 2431617ba13bSMingming Cao ext4_fsblk_t start; 2432617ba13bSMingming Cao ext4_fsblk_t len; 2433ac27a0ecSDave Kleikamp int hblock, blocksize; 2434617ba13bSMingming Cao ext4_fsblk_t sb_block; 2435ac27a0ecSDave Kleikamp unsigned long offset; 2436617ba13bSMingming Cao struct ext4_super_block * es; 2437ac27a0ecSDave Kleikamp struct block_device *bdev; 2438ac27a0ecSDave Kleikamp 2439617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 2440ac27a0ecSDave Kleikamp if (bdev == NULL) 2441ac27a0ecSDave Kleikamp return NULL; 2442ac27a0ecSDave Kleikamp 2443ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 2444ac27a0ecSDave Kleikamp printk(KERN_ERR 2445617ba13bSMingming Cao "EXT4: failed to claim external journal device.\n"); 2446ac27a0ecSDave Kleikamp blkdev_put(bdev); 2447ac27a0ecSDave Kleikamp return NULL; 2448ac27a0ecSDave Kleikamp } 2449ac27a0ecSDave Kleikamp 2450ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2451ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2452ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2453ac27a0ecSDave Kleikamp printk(KERN_ERR 2454617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2455ac27a0ecSDave Kleikamp goto out_bdev; 2456ac27a0ecSDave Kleikamp } 2457ac27a0ecSDave Kleikamp 2458617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2459617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2460ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2461ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2462617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2463ac27a0ecSDave Kleikamp "external journal\n"); 2464ac27a0ecSDave Kleikamp goto out_bdev; 2465ac27a0ecSDave Kleikamp } 2466ac27a0ecSDave Kleikamp 2467617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2468617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2469ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2470617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 2471617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 2472ac27a0ecSDave Kleikamp "bad superblock\n"); 2473ac27a0ecSDave Kleikamp brelse(bh); 2474ac27a0ecSDave Kleikamp goto out_bdev; 2475ac27a0ecSDave Kleikamp } 2476ac27a0ecSDave Kleikamp 2477617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 2478617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 2479ac27a0ecSDave Kleikamp brelse(bh); 2480ac27a0ecSDave Kleikamp goto out_bdev; 2481ac27a0ecSDave Kleikamp } 2482ac27a0ecSDave Kleikamp 2483bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 2484ac27a0ecSDave Kleikamp start = sb_block + 1; 2485ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 2486ac27a0ecSDave Kleikamp 2487dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 2488ac27a0ecSDave Kleikamp start, len, blocksize); 2489ac27a0ecSDave Kleikamp if (!journal) { 2490617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 2491ac27a0ecSDave Kleikamp goto out_bdev; 2492ac27a0ecSDave Kleikamp } 2493ac27a0ecSDave Kleikamp journal->j_private = sb; 2494ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 2495ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 2496ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 2497617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 2498ac27a0ecSDave Kleikamp goto out_journal; 2499ac27a0ecSDave Kleikamp } 2500ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 2501617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 2502ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 2503ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 2504ac27a0ecSDave Kleikamp goto out_journal; 2505ac27a0ecSDave Kleikamp } 2506617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 2507617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2508ac27a0ecSDave Kleikamp return journal; 2509ac27a0ecSDave Kleikamp out_journal: 2510dab291afSMingming Cao jbd2_journal_destroy(journal); 2511ac27a0ecSDave Kleikamp out_bdev: 2512617ba13bSMingming Cao ext4_blkdev_put(bdev); 2513ac27a0ecSDave Kleikamp return NULL; 2514ac27a0ecSDave Kleikamp } 2515ac27a0ecSDave Kleikamp 2516617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 2517617ba13bSMingming Cao struct ext4_super_block *es, 2518ac27a0ecSDave Kleikamp unsigned long journal_devnum) 2519ac27a0ecSDave Kleikamp { 2520ac27a0ecSDave Kleikamp journal_t *journal; 2521ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 2522ac27a0ecSDave Kleikamp dev_t journal_dev; 2523ac27a0ecSDave Kleikamp int err = 0; 2524ac27a0ecSDave Kleikamp int really_read_only; 2525ac27a0ecSDave Kleikamp 2526ac27a0ecSDave Kleikamp if (journal_devnum && 2527ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2528617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 2529ac27a0ecSDave Kleikamp "numbers have changed\n"); 2530ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 2531ac27a0ecSDave Kleikamp } else 2532ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 2533ac27a0ecSDave Kleikamp 2534ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 2535ac27a0ecSDave Kleikamp 2536ac27a0ecSDave Kleikamp /* 2537ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 2538ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 2539ac27a0ecSDave Kleikamp * can get read-write access to the device. 2540ac27a0ecSDave Kleikamp */ 2541ac27a0ecSDave Kleikamp 2542617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2543ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2544617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 2545ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 2546ac27a0ecSDave Kleikamp if (really_read_only) { 2547617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 2548ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 2549ac27a0ecSDave Kleikamp return -EROFS; 2550ac27a0ecSDave Kleikamp } 2551617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: write access will " 2552ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 2553ac27a0ecSDave Kleikamp } 2554ac27a0ecSDave Kleikamp } 2555ac27a0ecSDave Kleikamp 2556ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 2557617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 2558ac27a0ecSDave Kleikamp "and inode journals!\n"); 2559ac27a0ecSDave Kleikamp return -EINVAL; 2560ac27a0ecSDave Kleikamp } 2561ac27a0ecSDave Kleikamp 2562ac27a0ecSDave Kleikamp if (journal_inum) { 2563617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2564ac27a0ecSDave Kleikamp return -EINVAL; 2565ac27a0ecSDave Kleikamp } else { 2566617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 2567ac27a0ecSDave Kleikamp return -EINVAL; 2568ac27a0ecSDave Kleikamp } 2569ac27a0ecSDave Kleikamp 2570ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 2571dab291afSMingming Cao err = jbd2_journal_update_format(journal); 2572ac27a0ecSDave Kleikamp if (err) { 2573617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 2574dab291afSMingming Cao jbd2_journal_destroy(journal); 2575ac27a0ecSDave Kleikamp return err; 2576ac27a0ecSDave Kleikamp } 2577ac27a0ecSDave Kleikamp } 2578ac27a0ecSDave Kleikamp 2579617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 2580dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 2581ac27a0ecSDave Kleikamp if (!err) 2582dab291afSMingming Cao err = jbd2_journal_load(journal); 2583ac27a0ecSDave Kleikamp 2584ac27a0ecSDave Kleikamp if (err) { 2585617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 2586dab291afSMingming Cao jbd2_journal_destroy(journal); 2587ac27a0ecSDave Kleikamp return err; 2588ac27a0ecSDave Kleikamp } 2589ac27a0ecSDave Kleikamp 2590617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2591617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2592ac27a0ecSDave Kleikamp 2593ac27a0ecSDave Kleikamp if (journal_devnum && 2594ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2595ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 2596ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2597ac27a0ecSDave Kleikamp 2598ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2599617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2600ac27a0ecSDave Kleikamp } 2601ac27a0ecSDave Kleikamp 2602ac27a0ecSDave Kleikamp return 0; 2603ac27a0ecSDave Kleikamp } 2604ac27a0ecSDave Kleikamp 2605617ba13bSMingming Cao static int ext4_create_journal(struct super_block * sb, 2606617ba13bSMingming Cao struct ext4_super_block * es, 2607ac27a0ecSDave Kleikamp unsigned int journal_inum) 2608ac27a0ecSDave Kleikamp { 2609ac27a0ecSDave Kleikamp journal_t *journal; 26106c675bd4SBorislav Petkov int err; 2611ac27a0ecSDave Kleikamp 2612ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2613617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " 2614ac27a0ecSDave Kleikamp "create journal.\n"); 2615ac27a0ecSDave Kleikamp return -EROFS; 2616ac27a0ecSDave Kleikamp } 2617ac27a0ecSDave Kleikamp 26186c675bd4SBorislav Petkov journal = ext4_get_journal(sb, journal_inum); 26196c675bd4SBorislav Petkov if (!journal) 2620ac27a0ecSDave Kleikamp return -EINVAL; 2621ac27a0ecSDave Kleikamp 2622617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", 2623ac27a0ecSDave Kleikamp journal_inum); 2624ac27a0ecSDave Kleikamp 26256c675bd4SBorislav Petkov err = jbd2_journal_create(journal); 26266c675bd4SBorislav Petkov if (err) { 2627617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error creating journal.\n"); 2628dab291afSMingming Cao jbd2_journal_destroy(journal); 2629ac27a0ecSDave Kleikamp return -EIO; 2630ac27a0ecSDave Kleikamp } 2631ac27a0ecSDave Kleikamp 2632617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2633ac27a0ecSDave Kleikamp 2634617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 2635617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2636617ba13bSMingming Cao EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); 2637ac27a0ecSDave Kleikamp 2638ac27a0ecSDave Kleikamp es->s_journal_inum = cpu_to_le32(journal_inum); 2639ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2640ac27a0ecSDave Kleikamp 2641ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2642617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2643ac27a0ecSDave Kleikamp 2644ac27a0ecSDave Kleikamp return 0; 2645ac27a0ecSDave Kleikamp } 2646ac27a0ecSDave Kleikamp 2647617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 2648617ba13bSMingming Cao struct ext4_super_block * es, 2649ac27a0ecSDave Kleikamp int sync) 2650ac27a0ecSDave Kleikamp { 2651617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 2652ac27a0ecSDave Kleikamp 2653ac27a0ecSDave Kleikamp if (!sbh) 2654ac27a0ecSDave Kleikamp return; 2655ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 2656bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); 2657617ba13bSMingming Cao es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 2658ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 2659ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 2660ac27a0ecSDave Kleikamp if (sync) 2661ac27a0ecSDave Kleikamp sync_dirty_buffer(sbh); 2662ac27a0ecSDave Kleikamp } 2663ac27a0ecSDave Kleikamp 2664ac27a0ecSDave Kleikamp 2665ac27a0ecSDave Kleikamp /* 2666ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 2667ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 2668ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 2669ac27a0ecSDave Kleikamp */ 2670617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 2671617ba13bSMingming Cao struct ext4_super_block * es) 2672ac27a0ecSDave Kleikamp { 2673617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2674ac27a0ecSDave Kleikamp 2675dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2676dab291afSMingming Cao jbd2_journal_flush(journal); 267732c37730SJan Kara lock_super(sb); 2678617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 2679ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 2680617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2681ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2682617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2683ac27a0ecSDave Kleikamp } 268432c37730SJan Kara unlock_super(sb); 2685dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 2686ac27a0ecSDave Kleikamp } 2687ac27a0ecSDave Kleikamp 2688ac27a0ecSDave Kleikamp /* 2689ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 2690ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 2691ac27a0ecSDave Kleikamp * main filesystem now. 2692ac27a0ecSDave Kleikamp */ 2693617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 2694617ba13bSMingming Cao struct ext4_super_block * es) 2695ac27a0ecSDave Kleikamp { 2696ac27a0ecSDave Kleikamp journal_t *journal; 2697ac27a0ecSDave Kleikamp int j_errno; 2698ac27a0ecSDave Kleikamp const char *errstr; 2699ac27a0ecSDave Kleikamp 2700617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2701ac27a0ecSDave Kleikamp 2702ac27a0ecSDave Kleikamp /* 2703ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 2704617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 2705ac27a0ecSDave Kleikamp */ 2706ac27a0ecSDave Kleikamp 2707dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 2708ac27a0ecSDave Kleikamp if (j_errno) { 2709ac27a0ecSDave Kleikamp char nbuf[16]; 2710ac27a0ecSDave Kleikamp 2711617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 271246e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 2713ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 271446e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 2715ac27a0ecSDave Kleikamp "filesystem check."); 2716ac27a0ecSDave Kleikamp 2717617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2718617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2719617ba13bSMingming Cao ext4_commit_super (sb, es, 1); 2720ac27a0ecSDave Kleikamp 2721dab291afSMingming Cao jbd2_journal_clear_err(journal); 2722ac27a0ecSDave Kleikamp } 2723ac27a0ecSDave Kleikamp } 2724ac27a0ecSDave Kleikamp 2725ac27a0ecSDave Kleikamp /* 2726ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 2727ac27a0ecSDave Kleikamp * and wait on the commit. 2728ac27a0ecSDave Kleikamp */ 2729617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 2730ac27a0ecSDave Kleikamp { 2731ac27a0ecSDave Kleikamp journal_t *journal; 2732ac27a0ecSDave Kleikamp int ret; 2733ac27a0ecSDave Kleikamp 2734ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 2735ac27a0ecSDave Kleikamp return 0; 2736ac27a0ecSDave Kleikamp 2737617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2738ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2739617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 2740ac27a0ecSDave Kleikamp return ret; 2741ac27a0ecSDave Kleikamp } 2742ac27a0ecSDave Kleikamp 2743ac27a0ecSDave Kleikamp /* 2744617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 2745ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 2746ac27a0ecSDave Kleikamp * point. Just start an async writeback to get the buffers on their way 2747ac27a0ecSDave Kleikamp * to the disk. 2748ac27a0ecSDave Kleikamp * 2749ac27a0ecSDave Kleikamp * This implicitly triggers the writebehind on sync(). 2750ac27a0ecSDave Kleikamp */ 2751ac27a0ecSDave Kleikamp 2752617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb) 2753ac27a0ecSDave Kleikamp { 2754ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 2755ac27a0ecSDave Kleikamp BUG(); 2756ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2757ac27a0ecSDave Kleikamp } 2758ac27a0ecSDave Kleikamp 2759617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 2760ac27a0ecSDave Kleikamp { 2761ac27a0ecSDave Kleikamp tid_t target; 2762ac27a0ecSDave Kleikamp 2763ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2764dab291afSMingming Cao if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { 2765ac27a0ecSDave Kleikamp if (wait) 2766dab291afSMingming Cao jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); 2767ac27a0ecSDave Kleikamp } 2768ac27a0ecSDave Kleikamp return 0; 2769ac27a0ecSDave Kleikamp } 2770ac27a0ecSDave Kleikamp 2771ac27a0ecSDave Kleikamp /* 2772ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 2773ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 2774ac27a0ecSDave Kleikamp */ 2775617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb) 2776ac27a0ecSDave Kleikamp { 2777ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2778ac27a0ecSDave Kleikamp 2779ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2780617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2781ac27a0ecSDave Kleikamp 2782ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 2783dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2784dab291afSMingming Cao jbd2_journal_flush(journal); 2785ac27a0ecSDave Kleikamp 2786ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 2787617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2788617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2789ac27a0ecSDave Kleikamp } 2790ac27a0ecSDave Kleikamp } 2791ac27a0ecSDave Kleikamp 2792ac27a0ecSDave Kleikamp /* 2793ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 2794ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 2795ac27a0ecSDave Kleikamp */ 2796617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb) 2797ac27a0ecSDave Kleikamp { 2798ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2799ac27a0ecSDave Kleikamp lock_super(sb); 2800ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 2801617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2802617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2803ac27a0ecSDave Kleikamp unlock_super(sb); 2804dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 2805ac27a0ecSDave Kleikamp } 2806ac27a0ecSDave Kleikamp } 2807ac27a0ecSDave Kleikamp 2808617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data) 2809ac27a0ecSDave Kleikamp { 2810617ba13bSMingming Cao struct ext4_super_block * es; 2811617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2812617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 2813ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 2814617ba13bSMingming Cao struct ext4_mount_options old_opts; 2815ac27a0ecSDave Kleikamp int err; 2816ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2817ac27a0ecSDave Kleikamp int i; 2818ac27a0ecSDave Kleikamp #endif 2819ac27a0ecSDave Kleikamp 2820ac27a0ecSDave Kleikamp /* Store the original options */ 2821ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 2822ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 2823ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 2824ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 2825ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 2826ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2827ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 2828ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2829ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 2830ac27a0ecSDave Kleikamp #endif 2831ac27a0ecSDave Kleikamp 2832ac27a0ecSDave Kleikamp /* 2833ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 2834ac27a0ecSDave Kleikamp */ 2835ac27a0ecSDave Kleikamp if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { 2836ac27a0ecSDave Kleikamp err = -EINVAL; 2837ac27a0ecSDave Kleikamp goto restore_opts; 2838ac27a0ecSDave Kleikamp } 2839ac27a0ecSDave Kleikamp 2840617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 284146e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 2842ac27a0ecSDave Kleikamp 2843ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2844617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2845ac27a0ecSDave Kleikamp 2846ac27a0ecSDave Kleikamp es = sbi->s_es; 2847ac27a0ecSDave Kleikamp 2848617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 2849ac27a0ecSDave Kleikamp 2850ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 2851bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 2852617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 2853ac27a0ecSDave Kleikamp err = -EROFS; 2854ac27a0ecSDave Kleikamp goto restore_opts; 2855ac27a0ecSDave Kleikamp } 2856ac27a0ecSDave Kleikamp 2857ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 2858ac27a0ecSDave Kleikamp /* 2859ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 2860ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 2861ac27a0ecSDave Kleikamp */ 2862ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 2863ac27a0ecSDave Kleikamp 2864ac27a0ecSDave Kleikamp /* 2865ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 2866ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 2867ac27a0ecSDave Kleikamp * mark the partition as valid again. 2868ac27a0ecSDave Kleikamp */ 2869617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 2870617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 2871ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 2872ac27a0ecSDave Kleikamp 287332c37730SJan Kara /* 287432c37730SJan Kara * We have to unlock super so that we can wait for 287532c37730SJan Kara * transactions. 287632c37730SJan Kara */ 287732c37730SJan Kara unlock_super(sb); 2878617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 287932c37730SJan Kara lock_super(sb); 2880ac27a0ecSDave Kleikamp } else { 2881ac27a0ecSDave Kleikamp __le32 ret; 2882617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2883617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 2884617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2885ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 2886ac27a0ecSDave Kleikamp "optional features (%x).\n", 2887ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(ret)); 2888ac27a0ecSDave Kleikamp err = -EROFS; 2889ac27a0ecSDave Kleikamp goto restore_opts; 2890ac27a0ecSDave Kleikamp } 2891ead6596bSEric Sandeen 2892ead6596bSEric Sandeen /* 2893ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 2894ead6596bSEric Sandeen * around from a previously readonly bdev mount, 2895ead6596bSEric Sandeen * require a full umount/remount for now. 2896ead6596bSEric Sandeen */ 2897ead6596bSEric Sandeen if (es->s_last_orphan) { 2898ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2899ead6596bSEric Sandeen "remount RDWR because of unprocessed " 2900ead6596bSEric Sandeen "orphan inode list. Please " 2901ead6596bSEric Sandeen "umount/remount instead.\n", 2902ead6596bSEric Sandeen sb->s_id); 2903ead6596bSEric Sandeen err = -EINVAL; 2904ead6596bSEric Sandeen goto restore_opts; 2905ead6596bSEric Sandeen } 2906ead6596bSEric Sandeen 2907ac27a0ecSDave Kleikamp /* 2908ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 2909ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 2910ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 2911ac27a0ecSDave Kleikamp * the partition.) 2912ac27a0ecSDave Kleikamp */ 2913617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2914ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2915617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 2916ac27a0ecSDave Kleikamp goto restore_opts; 2917617ba13bSMingming Cao if (!ext4_setup_super (sb, es, 0)) 2918ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2919ac27a0ecSDave Kleikamp } 2920ac27a0ecSDave Kleikamp } 2921ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2922ac27a0ecSDave Kleikamp /* Release old quota file names */ 2923ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2924ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 2925ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 2926ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 2927ac27a0ecSDave Kleikamp #endif 2928ac27a0ecSDave Kleikamp return 0; 2929ac27a0ecSDave Kleikamp restore_opts: 2930ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 2931ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 2932ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 2933ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 2934ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 2935ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2936ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 2937ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2938ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 2939ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 2940ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2941ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 2942ac27a0ecSDave Kleikamp } 2943ac27a0ecSDave Kleikamp #endif 2944ac27a0ecSDave Kleikamp return err; 2945ac27a0ecSDave Kleikamp } 2946ac27a0ecSDave Kleikamp 2947617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) 2948ac27a0ecSDave Kleikamp { 2949ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 2950617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2951617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 2952960cc398SPekka Enberg u64 fsid; 2953ac27a0ecSDave Kleikamp 29545e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 29555e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 29566bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 2957fd2d4291SAvantika Mathur ext4_group_t ngroups = sbi->s_groups_count, i; 29585e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 2959ac27a0ecSDave Kleikamp smp_rmb(); 2960ac27a0ecSDave Kleikamp 2961ac27a0ecSDave Kleikamp /* 29625e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 29635e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 29645e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 2965ac27a0ecSDave Kleikamp */ 2966ac27a0ecSDave Kleikamp 2967ac27a0ecSDave Kleikamp /* 2968ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 2969ac27a0ecSDave Kleikamp * overhead 2970ac27a0ecSDave Kleikamp */ 2971ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 2972ac27a0ecSDave Kleikamp 2973ac27a0ecSDave Kleikamp /* 2974ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 2975ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 2976ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 2977ac27a0ecSDave Kleikamp */ 2978ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 2979617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 2980617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 2981ac27a0ecSDave Kleikamp cond_resched(); 2982ac27a0ecSDave Kleikamp } 2983ac27a0ecSDave Kleikamp 2984ac27a0ecSDave Kleikamp /* 2985ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 2986ac27a0ecSDave Kleikamp * bitmap, and an inode table. 2987ac27a0ecSDave Kleikamp */ 29885e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 29895e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 29905e70030dSBadari Pulavarty smp_wmb(); 29916bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 2992ac27a0ecSDave Kleikamp } 2993ac27a0ecSDave Kleikamp 2994617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 2995ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 29965e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 299752d9f3b4SPeter Zijlstra buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); 2998308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 2999bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3000bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3001ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3002ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 300352d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 30045e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3005617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3006960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3007960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3008960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3009960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 3010ac27a0ecSDave Kleikamp return 0; 3011ac27a0ecSDave Kleikamp } 3012ac27a0ecSDave Kleikamp 3013ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 3014ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 3015ac27a0ecSDave Kleikamp * Process 1 Process 2 3016617ba13bSMingming Cao * ext4_create() quota_sync() 3017dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3018ac27a0ecSDave Kleikamp * DQUOT_INIT() down(dqio_mutex) 3019dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3020ac27a0ecSDave Kleikamp * 3021ac27a0ecSDave Kleikamp */ 3022ac27a0ecSDave Kleikamp 3023ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3024ac27a0ecSDave Kleikamp 3025ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3026ac27a0ecSDave Kleikamp { 3027ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3028ac27a0ecSDave Kleikamp } 3029ac27a0ecSDave Kleikamp 3030617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type) 3031ac27a0ecSDave Kleikamp { 3032ac27a0ecSDave Kleikamp handle_t *handle; 3033ac27a0ecSDave Kleikamp int ret, err; 3034ac27a0ecSDave Kleikamp 3035ac27a0ecSDave Kleikamp /* We may create quota structure so we need to reserve enough blocks */ 3036617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); 3037ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3038ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3039ac27a0ecSDave Kleikamp ret = dquot_initialize(inode, type); 3040617ba13bSMingming Cao err = ext4_journal_stop(handle); 3041ac27a0ecSDave Kleikamp if (!ret) 3042ac27a0ecSDave Kleikamp ret = err; 3043ac27a0ecSDave Kleikamp return ret; 3044ac27a0ecSDave Kleikamp } 3045ac27a0ecSDave Kleikamp 3046617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode) 3047ac27a0ecSDave Kleikamp { 3048ac27a0ecSDave Kleikamp handle_t *handle; 3049ac27a0ecSDave Kleikamp int ret, err; 3050ac27a0ecSDave Kleikamp 3051ac27a0ecSDave Kleikamp /* We may delete quota structure so we need to reserve enough blocks */ 3052617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); 30532887df13SJan Kara if (IS_ERR(handle)) { 30542887df13SJan Kara /* 30552887df13SJan Kara * We call dquot_drop() anyway to at least release references 30562887df13SJan Kara * to quota structures so that umount does not hang. 30572887df13SJan Kara */ 30582887df13SJan Kara dquot_drop(inode); 3059ac27a0ecSDave Kleikamp return PTR_ERR(handle); 30602887df13SJan Kara } 3061ac27a0ecSDave Kleikamp ret = dquot_drop(inode); 3062617ba13bSMingming Cao err = ext4_journal_stop(handle); 3063ac27a0ecSDave Kleikamp if (!ret) 3064ac27a0ecSDave Kleikamp ret = err; 3065ac27a0ecSDave Kleikamp return ret; 3066ac27a0ecSDave Kleikamp } 3067ac27a0ecSDave Kleikamp 3068617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3069ac27a0ecSDave Kleikamp { 3070ac27a0ecSDave Kleikamp int ret, err; 3071ac27a0ecSDave Kleikamp handle_t *handle; 3072ac27a0ecSDave Kleikamp struct inode *inode; 3073ac27a0ecSDave Kleikamp 3074ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3075617ba13bSMingming Cao handle = ext4_journal_start(inode, 3076617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3077ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3078ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3079ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3080617ba13bSMingming Cao err = ext4_journal_stop(handle); 3081ac27a0ecSDave Kleikamp if (!ret) 3082ac27a0ecSDave Kleikamp ret = err; 3083ac27a0ecSDave Kleikamp return ret; 3084ac27a0ecSDave Kleikamp } 3085ac27a0ecSDave Kleikamp 3086617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3087ac27a0ecSDave Kleikamp { 3088ac27a0ecSDave Kleikamp int ret, err; 3089ac27a0ecSDave Kleikamp handle_t *handle; 3090ac27a0ecSDave Kleikamp 3091617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3092617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3093ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3094ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3095ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3096617ba13bSMingming Cao err = ext4_journal_stop(handle); 3097ac27a0ecSDave Kleikamp if (!ret) 3098ac27a0ecSDave Kleikamp ret = err; 3099ac27a0ecSDave Kleikamp return ret; 3100ac27a0ecSDave Kleikamp } 3101ac27a0ecSDave Kleikamp 3102617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3103ac27a0ecSDave Kleikamp { 3104ac27a0ecSDave Kleikamp int ret, err; 3105ac27a0ecSDave Kleikamp handle_t *handle; 3106ac27a0ecSDave Kleikamp 3107617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3108617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 31099c3013e9SJan Kara if (IS_ERR(handle)) { 31109c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 31119c3013e9SJan Kara dquot_release(dquot); 3112ac27a0ecSDave Kleikamp return PTR_ERR(handle); 31139c3013e9SJan Kara } 3114ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3115617ba13bSMingming Cao err = ext4_journal_stop(handle); 3116ac27a0ecSDave Kleikamp if (!ret) 3117ac27a0ecSDave Kleikamp ret = err; 3118ac27a0ecSDave Kleikamp return ret; 3119ac27a0ecSDave Kleikamp } 3120ac27a0ecSDave Kleikamp 3121617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3122ac27a0ecSDave Kleikamp { 3123ac27a0ecSDave Kleikamp /* Are we journalling quotas? */ 3124617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3125617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3126ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3127617ba13bSMingming Cao return ext4_write_dquot(dquot); 3128ac27a0ecSDave Kleikamp } else { 3129ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3130ac27a0ecSDave Kleikamp } 3131ac27a0ecSDave Kleikamp } 3132ac27a0ecSDave Kleikamp 3133617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3134ac27a0ecSDave Kleikamp { 3135ac27a0ecSDave Kleikamp int ret, err; 3136ac27a0ecSDave Kleikamp handle_t *handle; 3137ac27a0ecSDave Kleikamp 3138ac27a0ecSDave Kleikamp /* Data block + inode block */ 3139617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3140ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3141ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3142ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3143617ba13bSMingming Cao err = ext4_journal_stop(handle); 3144ac27a0ecSDave Kleikamp if (!ret) 3145ac27a0ecSDave Kleikamp ret = err; 3146ac27a0ecSDave Kleikamp return ret; 3147ac27a0ecSDave Kleikamp } 3148ac27a0ecSDave Kleikamp 3149ac27a0ecSDave Kleikamp /* 3150ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3151ac27a0ecSDave Kleikamp * the quota file and such... 3152ac27a0ecSDave Kleikamp */ 3153617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3154ac27a0ecSDave Kleikamp { 3155617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3156617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3157ac27a0ecSDave Kleikamp } 3158ac27a0ecSDave Kleikamp 3159ac27a0ecSDave Kleikamp /* 3160ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3161ac27a0ecSDave Kleikamp */ 3162617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 31636f28e087SJan Kara char *path, int remount) 3164ac27a0ecSDave Kleikamp { 3165ac27a0ecSDave Kleikamp int err; 3166ac27a0ecSDave Kleikamp struct nameidata nd; 3167ac27a0ecSDave Kleikamp 3168ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3169ac27a0ecSDave Kleikamp return -EINVAL; 3170ac27a0ecSDave Kleikamp /* Not journalling quota? */ 31716f28e087SJan Kara if ((!EXT4_SB(sb)->s_qf_names[USRQUOTA] && 31726f28e087SJan Kara !EXT4_SB(sb)->s_qf_names[GRPQUOTA]) || remount) 31736f28e087SJan Kara return vfs_quota_on(sb, type, format_id, path, remount); 3174ac27a0ecSDave Kleikamp err = path_lookup(path, LOOKUP_FOLLOW, &nd); 3175ac27a0ecSDave Kleikamp if (err) 3176ac27a0ecSDave Kleikamp return err; 3177ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 31784ac91378SJan Blunck if (nd.path.mnt->mnt_sb != sb) { 31791d957f9bSJan Blunck path_put(&nd.path); 3180ac27a0ecSDave Kleikamp return -EXDEV; 3181ac27a0ecSDave Kleikamp } 3182ac27a0ecSDave Kleikamp /* Quotafile not of fs root? */ 31834ac91378SJan Blunck if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode) 3184ac27a0ecSDave Kleikamp printk(KERN_WARNING 3185617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 3186ac27a0ecSDave Kleikamp "Journalled quota will not work.\n"); 31871d957f9bSJan Blunck path_put(&nd.path); 31886f28e087SJan Kara return vfs_quota_on(sb, type, format_id, path, remount); 3189ac27a0ecSDave Kleikamp } 3190ac27a0ecSDave Kleikamp 3191ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3192ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3193ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3194ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3195617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3196ac27a0ecSDave Kleikamp size_t len, loff_t off) 3197ac27a0ecSDave Kleikamp { 3198ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3199725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3200ac27a0ecSDave Kleikamp int err = 0; 3201ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3202ac27a0ecSDave Kleikamp int tocopy; 3203ac27a0ecSDave Kleikamp size_t toread; 3204ac27a0ecSDave Kleikamp struct buffer_head *bh; 3205ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3206ac27a0ecSDave Kleikamp 3207ac27a0ecSDave Kleikamp if (off > i_size) 3208ac27a0ecSDave Kleikamp return 0; 3209ac27a0ecSDave Kleikamp if (off+len > i_size) 3210ac27a0ecSDave Kleikamp len = i_size-off; 3211ac27a0ecSDave Kleikamp toread = len; 3212ac27a0ecSDave Kleikamp while (toread > 0) { 3213ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3214ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3215617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3216ac27a0ecSDave Kleikamp if (err) 3217ac27a0ecSDave Kleikamp return err; 3218ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3219ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3220ac27a0ecSDave Kleikamp else 3221ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3222ac27a0ecSDave Kleikamp brelse(bh); 3223ac27a0ecSDave Kleikamp offset = 0; 3224ac27a0ecSDave Kleikamp toread -= tocopy; 3225ac27a0ecSDave Kleikamp data += tocopy; 3226ac27a0ecSDave Kleikamp blk++; 3227ac27a0ecSDave Kleikamp } 3228ac27a0ecSDave Kleikamp return len; 3229ac27a0ecSDave Kleikamp } 3230ac27a0ecSDave Kleikamp 3231ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3232ac27a0ecSDave Kleikamp * enough credits) */ 3233617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3234ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3235ac27a0ecSDave Kleikamp { 3236ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3237725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3238ac27a0ecSDave Kleikamp int err = 0; 3239ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3240ac27a0ecSDave Kleikamp int tocopy; 3241617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3242ac27a0ecSDave Kleikamp size_t towrite = len; 3243ac27a0ecSDave Kleikamp struct buffer_head *bh; 3244ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3245ac27a0ecSDave Kleikamp 32469c3013e9SJan Kara if (!handle) { 32479c3013e9SJan Kara printk(KERN_WARNING "EXT4-fs: Quota write (off=%Lu, len=%Lu)" 32489c3013e9SJan Kara " cancelled because transaction is not started.\n", 32499c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 32509c3013e9SJan Kara return -EIO; 32519c3013e9SJan Kara } 3252ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3253ac27a0ecSDave Kleikamp while (towrite > 0) { 3254ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3255ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3256617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3257ac27a0ecSDave Kleikamp if (!bh) 3258ac27a0ecSDave Kleikamp goto out; 3259ac27a0ecSDave Kleikamp if (journal_quota) { 3260617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3261ac27a0ecSDave Kleikamp if (err) { 3262ac27a0ecSDave Kleikamp brelse(bh); 3263ac27a0ecSDave Kleikamp goto out; 3264ac27a0ecSDave Kleikamp } 3265ac27a0ecSDave Kleikamp } 3266ac27a0ecSDave Kleikamp lock_buffer(bh); 3267ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3268ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3269ac27a0ecSDave Kleikamp unlock_buffer(bh); 3270ac27a0ecSDave Kleikamp if (journal_quota) 3271617ba13bSMingming Cao err = ext4_journal_dirty_metadata(handle, bh); 3272ac27a0ecSDave Kleikamp else { 3273ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3274617ba13bSMingming Cao err = ext4_journal_dirty_data(handle, bh); 3275ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3276ac27a0ecSDave Kleikamp } 3277ac27a0ecSDave Kleikamp brelse(bh); 3278ac27a0ecSDave Kleikamp if (err) 3279ac27a0ecSDave Kleikamp goto out; 3280ac27a0ecSDave Kleikamp offset = 0; 3281ac27a0ecSDave Kleikamp towrite -= tocopy; 3282ac27a0ecSDave Kleikamp data += tocopy; 3283ac27a0ecSDave Kleikamp blk++; 3284ac27a0ecSDave Kleikamp } 3285ac27a0ecSDave Kleikamp out: 3286ac27a0ecSDave Kleikamp if (len == towrite) 3287ac27a0ecSDave Kleikamp return err; 3288ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3289ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3290617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3291ac27a0ecSDave Kleikamp } 3292ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3293617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3294ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3295ac27a0ecSDave Kleikamp return len - towrite; 3296ac27a0ecSDave Kleikamp } 3297ac27a0ecSDave Kleikamp 3298ac27a0ecSDave Kleikamp #endif 3299ac27a0ecSDave Kleikamp 3300617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 3301ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 3302ac27a0ecSDave Kleikamp { 3303617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3304ac27a0ecSDave Kleikamp } 3305ac27a0ecSDave Kleikamp 3306617ba13bSMingming Cao static struct file_system_type ext4dev_fs_type = { 3307ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 3308617ba13bSMingming Cao .name = "ext4dev", 3309617ba13bSMingming Cao .get_sb = ext4_get_sb, 3310ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3311ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3312ac27a0ecSDave Kleikamp }; 3313ac27a0ecSDave Kleikamp 3314617ba13bSMingming Cao static int __init init_ext4_fs(void) 3315ac27a0ecSDave Kleikamp { 3316c9de560dSAlex Tomas int err; 3317c9de560dSAlex Tomas 3318c9de560dSAlex Tomas err = init_ext4_mballoc(); 3319ac27a0ecSDave Kleikamp if (err) 3320ac27a0ecSDave Kleikamp return err; 3321c9de560dSAlex Tomas 3322c9de560dSAlex Tomas err = init_ext4_xattr(); 3323c9de560dSAlex Tomas if (err) 3324c9de560dSAlex Tomas goto out2; 3325ac27a0ecSDave Kleikamp err = init_inodecache(); 3326ac27a0ecSDave Kleikamp if (err) 3327ac27a0ecSDave Kleikamp goto out1; 3328617ba13bSMingming Cao err = register_filesystem(&ext4dev_fs_type); 3329ac27a0ecSDave Kleikamp if (err) 3330ac27a0ecSDave Kleikamp goto out; 3331ac27a0ecSDave Kleikamp return 0; 3332ac27a0ecSDave Kleikamp out: 3333ac27a0ecSDave Kleikamp destroy_inodecache(); 3334ac27a0ecSDave Kleikamp out1: 3335617ba13bSMingming Cao exit_ext4_xattr(); 3336c9de560dSAlex Tomas out2: 3337c9de560dSAlex Tomas exit_ext4_mballoc(); 3338ac27a0ecSDave Kleikamp return err; 3339ac27a0ecSDave Kleikamp } 3340ac27a0ecSDave Kleikamp 3341617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 3342ac27a0ecSDave Kleikamp { 3343617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 3344ac27a0ecSDave Kleikamp destroy_inodecache(); 3345617ba13bSMingming Cao exit_ext4_xattr(); 3346c9de560dSAlex Tomas exit_ext4_mballoc(); 3347ac27a0ecSDave Kleikamp } 3348ac27a0ecSDave Kleikamp 3349ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 3350617ba13bSMingming Cao MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); 3351ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 3352617ba13bSMingming Cao module_init(init_ext4_fs) 3353617ba13bSMingming Cao module_exit(exit_ext4_fs) 3354