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> 24617ba13bSMingming Cao #include <linux/ext4_fs.h> 25dab291afSMingming Cao #include <linux/ext4_jbd2.h> 26ac27a0ecSDave Kleikamp #include <linux/slab.h> 27ac27a0ecSDave Kleikamp #include <linux/init.h> 28ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 29ac27a0ecSDave Kleikamp #include <linux/parser.h> 30ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 31ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 32a5694255SChristoph Hellwig #include <linux/exportfs.h> 33ac27a0ecSDave Kleikamp #include <linux/vfs.h> 34ac27a0ecSDave Kleikamp #include <linux/random.h> 35ac27a0ecSDave Kleikamp #include <linux/mount.h> 36ac27a0ecSDave Kleikamp #include <linux/namei.h> 37ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 38ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ac27a0ecSDave Kleikamp 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 44ac27a0ecSDave Kleikamp #include "xattr.h" 45ac27a0ecSDave Kleikamp #include "acl.h" 46ac27a0ecSDave Kleikamp #include "namei.h" 47717d50e4SAndreas Dilger #include "group.h" 48ac27a0ecSDave Kleikamp 49617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 50ac27a0ecSDave Kleikamp unsigned long journal_devnum); 51617ba13bSMingming Cao static int ext4_create_journal(struct super_block *, struct ext4_super_block *, 52ac27a0ecSDave Kleikamp unsigned int); 53617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 54617ba13bSMingming Cao struct ext4_super_block * es, 55ac27a0ecSDave Kleikamp int sync); 56617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 57617ba13bSMingming Cao struct ext4_super_block * es); 58617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 59617ba13bSMingming Cao struct ext4_super_block * es); 60617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 61617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 62ac27a0ecSDave Kleikamp char nbuf[16]); 63617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data); 64617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf); 65617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb); 66617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb); 67617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb); 68ac27a0ecSDave Kleikamp 69bd81d8eeSLaurent Vivier 708fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 718fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 72bd81d8eeSLaurent Vivier { 733a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 748fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 758fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 76bd81d8eeSLaurent Vivier } 77bd81d8eeSLaurent Vivier 788fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 798fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 80bd81d8eeSLaurent Vivier { 815272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 828fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 838fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 84bd81d8eeSLaurent Vivier } 85bd81d8eeSLaurent Vivier 868fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 878fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 88bd81d8eeSLaurent Vivier { 895272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 908fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 918fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 92bd81d8eeSLaurent Vivier } 93bd81d8eeSLaurent Vivier 948fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 958fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 96bd81d8eeSLaurent Vivier { 973a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 988fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 998fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 100bd81d8eeSLaurent Vivier } 101bd81d8eeSLaurent Vivier 1028fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1038fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 104bd81d8eeSLaurent Vivier { 1055272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1068fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1078fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 108bd81d8eeSLaurent Vivier } 109bd81d8eeSLaurent Vivier 1108fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1118fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 112bd81d8eeSLaurent Vivier { 1135272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1148fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1158fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 116bd81d8eeSLaurent Vivier } 117bd81d8eeSLaurent Vivier 118ac27a0ecSDave Kleikamp /* 119dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 120ac27a0ecSDave Kleikamp * 121ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 122ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 123ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 124ac27a0ecSDave Kleikamp * appropriate. 125ac27a0ecSDave Kleikamp */ 126617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 127ac27a0ecSDave Kleikamp { 128ac27a0ecSDave Kleikamp journal_t *journal; 129ac27a0ecSDave Kleikamp 130ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 131ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 132ac27a0ecSDave Kleikamp 133ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 134ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 135ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 136617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 137ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 138617ba13bSMingming Cao ext4_abort(sb, __FUNCTION__, 139ac27a0ecSDave Kleikamp "Detected aborted journal"); 140ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 141ac27a0ecSDave Kleikamp } 142ac27a0ecSDave Kleikamp 143dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 144ac27a0ecSDave Kleikamp } 145ac27a0ecSDave Kleikamp 146ac27a0ecSDave Kleikamp /* 147ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 148dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 149ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 150ac27a0ecSDave Kleikamp * appropriate. 151ac27a0ecSDave Kleikamp */ 152617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 153ac27a0ecSDave Kleikamp { 154ac27a0ecSDave Kleikamp struct super_block *sb; 155ac27a0ecSDave Kleikamp int err; 156ac27a0ecSDave Kleikamp int rc; 157ac27a0ecSDave Kleikamp 158ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 159ac27a0ecSDave Kleikamp err = handle->h_err; 160dab291afSMingming Cao rc = jbd2_journal_stop(handle); 161ac27a0ecSDave Kleikamp 162ac27a0ecSDave Kleikamp if (!err) 163ac27a0ecSDave Kleikamp err = rc; 164ac27a0ecSDave Kleikamp if (err) 165617ba13bSMingming Cao __ext4_std_error(sb, where, err); 166ac27a0ecSDave Kleikamp return err; 167ac27a0ecSDave Kleikamp } 168ac27a0ecSDave Kleikamp 169617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 170ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 171ac27a0ecSDave Kleikamp { 172ac27a0ecSDave Kleikamp char nbuf[16]; 173617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 174ac27a0ecSDave Kleikamp 175ac27a0ecSDave Kleikamp if (bh) 176ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 177ac27a0ecSDave Kleikamp 178ac27a0ecSDave Kleikamp if (!handle->h_err) 179ac27a0ecSDave Kleikamp handle->h_err = err; 180ac27a0ecSDave Kleikamp 181ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 182ac27a0ecSDave Kleikamp return; 183ac27a0ecSDave Kleikamp 184ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 185ac27a0ecSDave Kleikamp caller, errstr, err_fn); 186ac27a0ecSDave Kleikamp 187dab291afSMingming Cao jbd2_journal_abort_handle(handle); 188ac27a0ecSDave Kleikamp } 189ac27a0ecSDave Kleikamp 190ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 191ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 192ac27a0ecSDave Kleikamp * 193ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 194617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 195ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 196ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 197ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 198ac27a0ecSDave Kleikamp * write out the superblock safely. 199ac27a0ecSDave Kleikamp * 200dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 201ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 202ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 203ac27a0ecSDave Kleikamp */ 204ac27a0ecSDave Kleikamp 205617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 206ac27a0ecSDave Kleikamp { 207617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 208ac27a0ecSDave Kleikamp 209617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 210617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 211ac27a0ecSDave Kleikamp 212ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 213ac27a0ecSDave Kleikamp return; 214ac27a0ecSDave Kleikamp 215ac27a0ecSDave Kleikamp if (!test_opt (sb, ERRORS_CONT)) { 216617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 217ac27a0ecSDave Kleikamp 218617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 219ac27a0ecSDave Kleikamp if (journal) 220dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 221ac27a0ecSDave Kleikamp } 222ac27a0ecSDave Kleikamp if (test_opt (sb, ERRORS_RO)) { 223ac27a0ecSDave Kleikamp printk (KERN_CRIT "Remounting filesystem read-only\n"); 224ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 225ac27a0ecSDave Kleikamp } 226617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 227ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 228617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 229ac27a0ecSDave Kleikamp sb->s_id); 230ac27a0ecSDave Kleikamp } 231ac27a0ecSDave Kleikamp 232617ba13bSMingming Cao void ext4_error (struct super_block * sb, const char * function, 233ac27a0ecSDave Kleikamp const char * fmt, ...) 234ac27a0ecSDave Kleikamp { 235ac27a0ecSDave Kleikamp va_list args; 236ac27a0ecSDave Kleikamp 237ac27a0ecSDave Kleikamp va_start(args, fmt); 238617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 239ac27a0ecSDave Kleikamp vprintk(fmt, args); 240ac27a0ecSDave Kleikamp printk("\n"); 241ac27a0ecSDave Kleikamp va_end(args); 242ac27a0ecSDave Kleikamp 243617ba13bSMingming Cao ext4_handle_error(sb); 244ac27a0ecSDave Kleikamp } 245ac27a0ecSDave Kleikamp 246617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 247ac27a0ecSDave Kleikamp char nbuf[16]) 248ac27a0ecSDave Kleikamp { 249ac27a0ecSDave Kleikamp char *errstr = NULL; 250ac27a0ecSDave Kleikamp 251ac27a0ecSDave Kleikamp switch (errno) { 252ac27a0ecSDave Kleikamp case -EIO: 253ac27a0ecSDave Kleikamp errstr = "IO failure"; 254ac27a0ecSDave Kleikamp break; 255ac27a0ecSDave Kleikamp case -ENOMEM: 256ac27a0ecSDave Kleikamp errstr = "Out of memory"; 257ac27a0ecSDave Kleikamp break; 258ac27a0ecSDave Kleikamp case -EROFS: 259dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 260ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 261ac27a0ecSDave Kleikamp else 262ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 263ac27a0ecSDave Kleikamp break; 264ac27a0ecSDave Kleikamp default: 265ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 266ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 267ac27a0ecSDave Kleikamp * NULL. */ 268ac27a0ecSDave Kleikamp if (nbuf) { 269ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 270ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 271ac27a0ecSDave Kleikamp errstr = nbuf; 272ac27a0ecSDave Kleikamp } 273ac27a0ecSDave Kleikamp break; 274ac27a0ecSDave Kleikamp } 275ac27a0ecSDave Kleikamp 276ac27a0ecSDave Kleikamp return errstr; 277ac27a0ecSDave Kleikamp } 278ac27a0ecSDave Kleikamp 279617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 280ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 281ac27a0ecSDave Kleikamp 282617ba13bSMingming Cao void __ext4_std_error (struct super_block * sb, const char * function, 283ac27a0ecSDave Kleikamp int errno) 284ac27a0ecSDave Kleikamp { 285ac27a0ecSDave Kleikamp char nbuf[16]; 286ac27a0ecSDave Kleikamp const char *errstr; 287ac27a0ecSDave Kleikamp 288ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 289ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 290ac27a0ecSDave Kleikamp * an error. */ 291ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 292ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 293ac27a0ecSDave Kleikamp return; 294ac27a0ecSDave Kleikamp 295617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 296617ba13bSMingming Cao printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 297ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 298ac27a0ecSDave Kleikamp 299617ba13bSMingming Cao ext4_handle_error(sb); 300ac27a0ecSDave Kleikamp } 301ac27a0ecSDave Kleikamp 302ac27a0ecSDave Kleikamp /* 303617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 304ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 305ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 306ac27a0ecSDave Kleikamp * 307ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 308ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 309ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 310ac27a0ecSDave Kleikamp */ 311ac27a0ecSDave Kleikamp 312617ba13bSMingming Cao void ext4_abort (struct super_block * sb, const char * function, 313ac27a0ecSDave Kleikamp const char * fmt, ...) 314ac27a0ecSDave Kleikamp { 315ac27a0ecSDave Kleikamp va_list args; 316ac27a0ecSDave Kleikamp 317617ba13bSMingming Cao printk (KERN_CRIT "ext4_abort called.\n"); 318ac27a0ecSDave Kleikamp 319ac27a0ecSDave Kleikamp va_start(args, fmt); 320617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 321ac27a0ecSDave Kleikamp vprintk(fmt, args); 322ac27a0ecSDave Kleikamp printk("\n"); 323ac27a0ecSDave Kleikamp va_end(args); 324ac27a0ecSDave Kleikamp 325ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 326617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 327ac27a0ecSDave Kleikamp 328ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 329ac27a0ecSDave Kleikamp return; 330ac27a0ecSDave Kleikamp 331ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 332617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 333ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 334617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 335dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 336ac27a0ecSDave Kleikamp } 337ac27a0ecSDave Kleikamp 338617ba13bSMingming Cao void ext4_warning (struct super_block * sb, const char * function, 339ac27a0ecSDave Kleikamp const char * fmt, ...) 340ac27a0ecSDave Kleikamp { 341ac27a0ecSDave Kleikamp va_list args; 342ac27a0ecSDave Kleikamp 343ac27a0ecSDave Kleikamp va_start(args, fmt); 344617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 345ac27a0ecSDave Kleikamp sb->s_id, function); 346ac27a0ecSDave Kleikamp vprintk(fmt, args); 347ac27a0ecSDave Kleikamp printk("\n"); 348ac27a0ecSDave Kleikamp va_end(args); 349ac27a0ecSDave Kleikamp } 350ac27a0ecSDave Kleikamp 351617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 352ac27a0ecSDave Kleikamp { 353617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 354ac27a0ecSDave Kleikamp 355617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 356ac27a0ecSDave Kleikamp return; 357ac27a0ecSDave Kleikamp 358617ba13bSMingming Cao ext4_warning(sb, __FUNCTION__, 359ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 360ac27a0ecSDave Kleikamp "running e2fsck is recommended", 361617ba13bSMingming Cao EXT4_DYNAMIC_REV); 362ac27a0ecSDave Kleikamp 363617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 364617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 365617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 366ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 367ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 368ac27a0ecSDave Kleikamp 369ac27a0ecSDave Kleikamp /* 370ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 371ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 372ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 373ac27a0ecSDave Kleikamp */ 374ac27a0ecSDave Kleikamp } 375ac27a0ecSDave Kleikamp 37699e6f829SAneesh Kumar K.V int ext4_update_compat_feature(handle_t *handle, 37799e6f829SAneesh Kumar K.V struct super_block *sb, __u32 compat) 37899e6f829SAneesh Kumar K.V { 37999e6f829SAneesh Kumar K.V int err = 0; 38099e6f829SAneesh Kumar K.V if (!EXT4_HAS_COMPAT_FEATURE(sb, compat)) { 38199e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 38299e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 38399e6f829SAneesh Kumar K.V if (err) 38499e6f829SAneesh Kumar K.V return err; 38599e6f829SAneesh Kumar K.V EXT4_SET_COMPAT_FEATURE(sb, compat); 38699e6f829SAneesh Kumar K.V sb->s_dirt = 1; 38799e6f829SAneesh Kumar K.V handle->h_sync = 1; 38899e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 38999e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 39099e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 39199e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 39299e6f829SAneesh Kumar K.V } 39399e6f829SAneesh Kumar K.V return err; 39499e6f829SAneesh Kumar K.V } 39599e6f829SAneesh Kumar K.V 39699e6f829SAneesh Kumar K.V int ext4_update_rocompat_feature(handle_t *handle, 39799e6f829SAneesh Kumar K.V struct super_block *sb, __u32 rocompat) 39899e6f829SAneesh Kumar K.V { 39999e6f829SAneesh Kumar K.V int err = 0; 40099e6f829SAneesh Kumar K.V if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, rocompat)) { 40199e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 40299e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 40399e6f829SAneesh Kumar K.V if (err) 40499e6f829SAneesh Kumar K.V return err; 40599e6f829SAneesh Kumar K.V EXT4_SET_RO_COMPAT_FEATURE(sb, rocompat); 40699e6f829SAneesh Kumar K.V sb->s_dirt = 1; 40799e6f829SAneesh Kumar K.V handle->h_sync = 1; 40899e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 40999e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 41099e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 41199e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 41299e6f829SAneesh Kumar K.V } 41399e6f829SAneesh Kumar K.V return err; 41499e6f829SAneesh Kumar K.V } 41599e6f829SAneesh Kumar K.V 41699e6f829SAneesh Kumar K.V int ext4_update_incompat_feature(handle_t *handle, 41799e6f829SAneesh Kumar K.V struct super_block *sb, __u32 incompat) 41899e6f829SAneesh Kumar K.V { 41999e6f829SAneesh Kumar K.V int err = 0; 42099e6f829SAneesh Kumar K.V if (!EXT4_HAS_INCOMPAT_FEATURE(sb, incompat)) { 42199e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 42299e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 42399e6f829SAneesh Kumar K.V if (err) 42499e6f829SAneesh Kumar K.V return err; 42599e6f829SAneesh Kumar K.V EXT4_SET_INCOMPAT_FEATURE(sb, incompat); 42699e6f829SAneesh Kumar K.V sb->s_dirt = 1; 42799e6f829SAneesh Kumar K.V handle->h_sync = 1; 42899e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 42999e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 43099e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 43199e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 43299e6f829SAneesh Kumar K.V } 43399e6f829SAneesh Kumar K.V return err; 43499e6f829SAneesh Kumar K.V } 43599e6f829SAneesh Kumar K.V 436ac27a0ecSDave Kleikamp /* 437ac27a0ecSDave Kleikamp * Open the external journal device 438ac27a0ecSDave Kleikamp */ 439617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 440ac27a0ecSDave Kleikamp { 441ac27a0ecSDave Kleikamp struct block_device *bdev; 442ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 443ac27a0ecSDave Kleikamp 444ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 445ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 446ac27a0ecSDave Kleikamp goto fail; 447ac27a0ecSDave Kleikamp return bdev; 448ac27a0ecSDave Kleikamp 449ac27a0ecSDave Kleikamp fail: 450617ba13bSMingming Cao printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", 451ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 452ac27a0ecSDave Kleikamp return NULL; 453ac27a0ecSDave Kleikamp } 454ac27a0ecSDave Kleikamp 455ac27a0ecSDave Kleikamp /* 456ac27a0ecSDave Kleikamp * Release the journal device 457ac27a0ecSDave Kleikamp */ 458617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 459ac27a0ecSDave Kleikamp { 460ac27a0ecSDave Kleikamp bd_release(bdev); 461ac27a0ecSDave Kleikamp return blkdev_put(bdev); 462ac27a0ecSDave Kleikamp } 463ac27a0ecSDave Kleikamp 464617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 465ac27a0ecSDave Kleikamp { 466ac27a0ecSDave Kleikamp struct block_device *bdev; 467ac27a0ecSDave Kleikamp int ret = -ENODEV; 468ac27a0ecSDave Kleikamp 469ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 470ac27a0ecSDave Kleikamp if (bdev) { 471617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 472ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 473ac27a0ecSDave Kleikamp } 474ac27a0ecSDave Kleikamp return ret; 475ac27a0ecSDave Kleikamp } 476ac27a0ecSDave Kleikamp 477ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 478ac27a0ecSDave Kleikamp { 479617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 480ac27a0ecSDave Kleikamp } 481ac27a0ecSDave Kleikamp 482617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 483ac27a0ecSDave Kleikamp { 484ac27a0ecSDave Kleikamp struct list_head *l; 485ac27a0ecSDave Kleikamp 486ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 487ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 488ac27a0ecSDave Kleikamp 489ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 490ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 491ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 492ac27a0ecSDave Kleikamp printk(KERN_ERR " " 493ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 494ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 495ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 496ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 497ac27a0ecSDave Kleikamp } 498ac27a0ecSDave Kleikamp } 499ac27a0ecSDave Kleikamp 500617ba13bSMingming Cao static void ext4_put_super (struct super_block * sb) 501ac27a0ecSDave Kleikamp { 502617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 503617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 504ac27a0ecSDave Kleikamp int i; 505ac27a0ecSDave Kleikamp 506c9de560dSAlex Tomas ext4_mb_release(sb); 507a86c6181SAlex Tomas ext4_ext_release(sb); 508617ba13bSMingming Cao ext4_xattr_put_super(sb); 509dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 510ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 511617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 512ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 513ac27a0ecSDave Kleikamp BUFFER_TRACE(sbi->s_sbh, "marking dirty"); 514ac27a0ecSDave Kleikamp mark_buffer_dirty(sbi->s_sbh); 515617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 516ac27a0ecSDave Kleikamp } 517ac27a0ecSDave Kleikamp 518ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 519ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 520ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 521ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 522ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 523ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 524ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 525ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 526ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 527ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 528ac27a0ecSDave Kleikamp #endif 529ac27a0ecSDave Kleikamp 530ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 531ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 532ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 533ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 534ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 535ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 536ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 537ac27a0ecSDave Kleikamp 538f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 539ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 540ac27a0ecSDave Kleikamp /* 541ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 542ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 543ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 544ac27a0ecSDave Kleikamp */ 545ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 546f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 547617ba13bSMingming Cao ext4_blkdev_remove(sbi); 548ac27a0ecSDave Kleikamp } 549ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 550ac27a0ecSDave Kleikamp kfree(sbi); 551ac27a0ecSDave Kleikamp return; 552ac27a0ecSDave Kleikamp } 553ac27a0ecSDave Kleikamp 554e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 555ac27a0ecSDave Kleikamp 556ac27a0ecSDave Kleikamp /* 557ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 558ac27a0ecSDave Kleikamp */ 559617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 560ac27a0ecSDave Kleikamp { 561617ba13bSMingming Cao struct ext4_inode_info *ei; 562ac27a0ecSDave Kleikamp 563e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 564ac27a0ecSDave Kleikamp if (!ei) 565ac27a0ecSDave Kleikamp return NULL; 566617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 567617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 568617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 569ac27a0ecSDave Kleikamp #endif 570ac27a0ecSDave Kleikamp ei->i_block_alloc_info = NULL; 571ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 572a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 573c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 574c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 575ac27a0ecSDave Kleikamp return &ei->vfs_inode; 576ac27a0ecSDave Kleikamp } 577ac27a0ecSDave Kleikamp 578617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 579ac27a0ecSDave Kleikamp { 5809f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 5819f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 5829f7dd93dSVasily Averin EXT4_I(inode)); 5839f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 5849f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 5859f7dd93dSVasily Averin true); 5869f7dd93dSVasily Averin dump_stack(); 5879f7dd93dSVasily Averin } 588617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 589ac27a0ecSDave Kleikamp } 590ac27a0ecSDave Kleikamp 5914ba9b9d0SChristoph Lameter static void init_once(struct kmem_cache *cachep, void *foo) 592ac27a0ecSDave Kleikamp { 593617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 594ac27a0ecSDave Kleikamp 595ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 596617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 597ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 598ac27a0ecSDave Kleikamp #endif 5990e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 600ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 601ac27a0ecSDave Kleikamp } 602ac27a0ecSDave Kleikamp 603ac27a0ecSDave Kleikamp static int init_inodecache(void) 604ac27a0ecSDave Kleikamp { 605617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 606617ba13bSMingming Cao sizeof(struct ext4_inode_info), 607ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 608ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 60920c2df83SPaul Mundt init_once); 610617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 611ac27a0ecSDave Kleikamp return -ENOMEM; 612ac27a0ecSDave Kleikamp return 0; 613ac27a0ecSDave Kleikamp } 614ac27a0ecSDave Kleikamp 615ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 616ac27a0ecSDave Kleikamp { 617617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 618ac27a0ecSDave Kleikamp } 619ac27a0ecSDave Kleikamp 620617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 621ac27a0ecSDave Kleikamp { 622617ba13bSMingming Cao struct ext4_block_alloc_info *rsv = EXT4_I(inode)->i_block_alloc_info; 623617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 624617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 625617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 626617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 627617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 628ac27a0ecSDave Kleikamp } 629617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 630617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 631617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 632617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 633ac27a0ecSDave Kleikamp } 634ac27a0ecSDave Kleikamp #endif 635617ba13bSMingming Cao ext4_discard_reservation(inode); 636617ba13bSMingming Cao EXT4_I(inode)->i_block_alloc_info = NULL; 637ac27a0ecSDave Kleikamp if (unlikely(rsv)) 638ac27a0ecSDave Kleikamp kfree(rsv); 639ac27a0ecSDave Kleikamp } 640ac27a0ecSDave Kleikamp 641617ba13bSMingming Cao static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb) 642ac27a0ecSDave Kleikamp { 643ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 644617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 645ac27a0ecSDave Kleikamp 646ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 647ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 648ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); 649ac27a0ecSDave Kleikamp 650ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 651ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 652ac27a0ecSDave Kleikamp 653ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 654ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 655ac27a0ecSDave Kleikamp 656617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 657ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 658ac27a0ecSDave Kleikamp 659617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 660ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 661ac27a0ecSDave Kleikamp #endif 662ac27a0ecSDave Kleikamp } 663ac27a0ecSDave Kleikamp 664d9c9bef1SMiklos Szeredi /* 665d9c9bef1SMiklos Szeredi * Show an option if 666d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 667d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 668d9c9bef1SMiklos Szeredi */ 669617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 670ac27a0ecSDave Kleikamp { 671aa22df2cSAneesh Kumar K.V int def_errors; 672aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 673ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 674d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 675d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 676d9c9bef1SMiklos Szeredi 677d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 678aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 679d9c9bef1SMiklos Szeredi 680d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 681d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 682d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 683d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 684aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 685d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 686d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 687d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 688d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 689d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 690d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 691d9c9bef1SMiklos Szeredi } 692d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 693d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 694d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 695d9c9bef1SMiklos Szeredi } 696bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 697d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 698bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 699d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 700bb4f397aSAneesh Kumar K.V } 701bb4f397aSAneesh Kumar K.V } 702aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 703bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 704aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 705d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 706aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 707d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 708aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 709d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 710d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 711d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 71207620f69SAdrian Bunk #ifdef CONFIG_EXT4DEV_FS_XATTR 713aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 714aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 715d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 716d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 717d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 718d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 719d9c9bef1SMiklos Szeredi } 720d9c9bef1SMiklos Szeredi #endif 72107620f69SAdrian Bunk #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 722aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 723d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 724d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 725d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 726d9c9bef1SMiklos Szeredi #endif 727d9c9bef1SMiklos Szeredi if (!test_opt(sb, RESERVATION)) 728d9c9bef1SMiklos Szeredi seq_puts(seq, ",noreservation"); 729d9c9bef1SMiklos Szeredi if (sbi->s_commit_interval) { 730d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 731d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 732d9c9bef1SMiklos Szeredi } 733d9c9bef1SMiklos Szeredi if (test_opt(sb, BARRIER)) 734d9c9bef1SMiklos Szeredi seq_puts(seq, ",barrier=1"); 735d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 736d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 737d9c9bef1SMiklos Szeredi if (!test_opt(sb, EXTENTS)) 738d9c9bef1SMiklos Szeredi seq_puts(seq, ",noextents"); 7393dbd0edeSAneesh Kumar K.V if (!test_opt(sb, MBALLOC)) 7403dbd0edeSAneesh Kumar K.V seq_puts(seq, ",nomballoc"); 74125ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 74225ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 743ac27a0ecSDave Kleikamp 744cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 745cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 746aa22df2cSAneesh Kumar K.V /* 747aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 748aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 749aa22df2cSAneesh Kumar K.V */ 750617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 751ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 752617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 753ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 754617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 755ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 756ac27a0ecSDave Kleikamp 757617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 758ac27a0ecSDave Kleikamp return 0; 759ac27a0ecSDave Kleikamp } 760ac27a0ecSDave Kleikamp 761ac27a0ecSDave Kleikamp 7621b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 7631b961ac0SChristoph Hellwig u64 ino, u32 generation) 764ac27a0ecSDave Kleikamp { 765ac27a0ecSDave Kleikamp struct inode *inode; 766ac27a0ecSDave Kleikamp 767617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 768ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 769617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 770ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 771ac27a0ecSDave Kleikamp 772ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 773ac27a0ecSDave Kleikamp * 774617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 775ac27a0ecSDave Kleikamp * deleted, so we should be safe. 776ac27a0ecSDave Kleikamp * 777ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 778ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 779ac27a0ecSDave Kleikamp */ 780ac27a0ecSDave Kleikamp inode = iget(sb, ino); 781ac27a0ecSDave Kleikamp if (inode == NULL) 782ac27a0ecSDave Kleikamp return ERR_PTR(-ENOMEM); 783ac27a0ecSDave Kleikamp if (is_bad_inode(inode) || 784ac27a0ecSDave Kleikamp (generation && inode->i_generation != generation)) { 785ac27a0ecSDave Kleikamp iput(inode); 786ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 787ac27a0ecSDave Kleikamp } 7881b961ac0SChristoph Hellwig 7891b961ac0SChristoph Hellwig return inode; 790ac27a0ecSDave Kleikamp } 7911b961ac0SChristoph Hellwig 7921b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 7931b961ac0SChristoph Hellwig int fh_len, int fh_type) 7941b961ac0SChristoph Hellwig { 7951b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 7961b961ac0SChristoph Hellwig ext4_nfs_get_inode); 7971b961ac0SChristoph Hellwig } 7981b961ac0SChristoph Hellwig 7991b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 8001b961ac0SChristoph Hellwig int fh_len, int fh_type) 8011b961ac0SChristoph Hellwig { 8021b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 8031b961ac0SChristoph Hellwig ext4_nfs_get_inode); 804ac27a0ecSDave Kleikamp } 805ac27a0ecSDave Kleikamp 806ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 807ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 808ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 809ac27a0ecSDave Kleikamp 810617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type); 811617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode); 812617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 813617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 814617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 815617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 816617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 817617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, char *path); 818617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 819617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 820ac27a0ecSDave Kleikamp size_t len, loff_t off); 821617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 822ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 823ac27a0ecSDave Kleikamp 824617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 825617ba13bSMingming Cao .initialize = ext4_dquot_initialize, 826617ba13bSMingming Cao .drop = ext4_dquot_drop, 827ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 828ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 829ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 830ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 831ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 832617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 833617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 834617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 835617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 836617ba13bSMingming Cao .write_info = ext4_write_info 837ac27a0ecSDave Kleikamp }; 838ac27a0ecSDave Kleikamp 839617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 840617ba13bSMingming Cao .quota_on = ext4_quota_on, 841ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 842ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 843ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 844ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 845ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 846ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 847ac27a0ecSDave Kleikamp }; 848ac27a0ecSDave Kleikamp #endif 849ac27a0ecSDave Kleikamp 850ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 851617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 852617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 853617ba13bSMingming Cao .read_inode = ext4_read_inode, 854617ba13bSMingming Cao .write_inode = ext4_write_inode, 855617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 856617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 857617ba13bSMingming Cao .put_super = ext4_put_super, 858617ba13bSMingming Cao .write_super = ext4_write_super, 859617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 860617ba13bSMingming Cao .write_super_lockfs = ext4_write_super_lockfs, 861617ba13bSMingming Cao .unlockfs = ext4_unlockfs, 862617ba13bSMingming Cao .statfs = ext4_statfs, 863617ba13bSMingming Cao .remount_fs = ext4_remount, 864617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 865617ba13bSMingming Cao .show_options = ext4_show_options, 866ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 867617ba13bSMingming Cao .quota_read = ext4_quota_read, 868617ba13bSMingming Cao .quota_write = ext4_quota_write, 869ac27a0ecSDave Kleikamp #endif 870ac27a0ecSDave Kleikamp }; 871ac27a0ecSDave Kleikamp 87239655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 8731b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 8741b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 875617ba13bSMingming Cao .get_parent = ext4_get_parent, 876ac27a0ecSDave Kleikamp }; 877ac27a0ecSDave Kleikamp 878ac27a0ecSDave Kleikamp enum { 879ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 880ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 881ac27a0ecSDave Kleikamp Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, 882ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 883ac27a0ecSDave Kleikamp Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 884ac27a0ecSDave Kleikamp Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, 885818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 886ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 887ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 888ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 889ac27a0ecSDave Kleikamp Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 89025ec56b5SJean Noel Cordenner Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, 891c9de560dSAlex Tomas Opt_mballoc, Opt_nomballoc, Opt_stripe, 892ac27a0ecSDave Kleikamp }; 893ac27a0ecSDave Kleikamp 894ac27a0ecSDave Kleikamp static match_table_t tokens = { 895ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 896ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 897ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 898ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 899ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 900ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 901ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 902ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 903ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 904ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 905ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 906ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 907ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 908ac27a0ecSDave Kleikamp {Opt_nocheck, "nocheck"}, 909ac27a0ecSDave Kleikamp {Opt_nocheck, "check=none"}, 910ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 911ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 912ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 913ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 914ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 915ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 916ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 917ac27a0ecSDave Kleikamp {Opt_reservation, "reservation"}, 918ac27a0ecSDave Kleikamp {Opt_noreservation, "noreservation"}, 919ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 920ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 921ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 922ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 923ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 924ac27a0ecSDave Kleikamp {Opt_journal_inum, "journal=%u"}, 925ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 926818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 927818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 928ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 929ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 930ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 931ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 932ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 933ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 934ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 935ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 936ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 937ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 938ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 939ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 940ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 941ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 942ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 943a86c6181SAlex Tomas {Opt_extents, "extents"}, 9441e2462f9SMingming Cao {Opt_noextents, "noextents"}, 94525ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 946c9de560dSAlex Tomas {Opt_mballoc, "mballoc"}, 947c9de560dSAlex Tomas {Opt_nomballoc, "nomballoc"}, 948c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 949ac27a0ecSDave Kleikamp {Opt_err, NULL}, 950ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 951ac27a0ecSDave Kleikamp }; 952ac27a0ecSDave Kleikamp 953617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 954ac27a0ecSDave Kleikamp { 955617ba13bSMingming Cao ext4_fsblk_t sb_block; 956ac27a0ecSDave Kleikamp char *options = (char *) *data; 957ac27a0ecSDave Kleikamp 958ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 959ac27a0ecSDave Kleikamp return 1; /* Default location */ 960ac27a0ecSDave Kleikamp options += 3; 961617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 962ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 963ac27a0ecSDave Kleikamp if (*options && *options != ',') { 964617ba13bSMingming Cao printk("EXT4-fs: Invalid sb specification: %s\n", 965ac27a0ecSDave Kleikamp (char *) *data); 966ac27a0ecSDave Kleikamp return 1; 967ac27a0ecSDave Kleikamp } 968ac27a0ecSDave Kleikamp if (*options == ',') 969ac27a0ecSDave Kleikamp options++; 970ac27a0ecSDave Kleikamp *data = (void *) options; 971ac27a0ecSDave Kleikamp return sb_block; 972ac27a0ecSDave Kleikamp } 973ac27a0ecSDave Kleikamp 974ac27a0ecSDave Kleikamp static int parse_options (char *options, struct super_block *sb, 975ac27a0ecSDave Kleikamp unsigned int *inum, unsigned long *journal_devnum, 976617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 977ac27a0ecSDave Kleikamp { 978617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 979ac27a0ecSDave Kleikamp char * p; 980ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 981ac27a0ecSDave Kleikamp int data_opt = 0; 982ac27a0ecSDave Kleikamp int option; 983ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 984ac27a0ecSDave Kleikamp int qtype; 985ac27a0ecSDave Kleikamp char *qname; 986ac27a0ecSDave Kleikamp #endif 987ac27a0ecSDave Kleikamp 988ac27a0ecSDave Kleikamp if (!options) 989ac27a0ecSDave Kleikamp return 1; 990ac27a0ecSDave Kleikamp 991ac27a0ecSDave Kleikamp while ((p = strsep (&options, ",")) != NULL) { 992ac27a0ecSDave Kleikamp int token; 993ac27a0ecSDave Kleikamp if (!*p) 994ac27a0ecSDave Kleikamp continue; 995ac27a0ecSDave Kleikamp 996ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 997ac27a0ecSDave Kleikamp switch (token) { 998ac27a0ecSDave Kleikamp case Opt_bsd_df: 999ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, MINIX_DF); 1000ac27a0ecSDave Kleikamp break; 1001ac27a0ecSDave Kleikamp case Opt_minix_df: 1002ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, MINIX_DF); 1003ac27a0ecSDave Kleikamp break; 1004ac27a0ecSDave Kleikamp case Opt_grpid: 1005ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, GRPID); 1006ac27a0ecSDave Kleikamp break; 1007ac27a0ecSDave Kleikamp case Opt_nogrpid: 1008ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, GRPID); 1009ac27a0ecSDave Kleikamp break; 1010ac27a0ecSDave Kleikamp case Opt_resuid: 1011ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1012ac27a0ecSDave Kleikamp return 0; 1013ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1014ac27a0ecSDave Kleikamp break; 1015ac27a0ecSDave Kleikamp case Opt_resgid: 1016ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1017ac27a0ecSDave Kleikamp return 0; 1018ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1019ac27a0ecSDave Kleikamp break; 1020ac27a0ecSDave Kleikamp case Opt_sb: 1021ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1022ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1023ac27a0ecSDave Kleikamp break; 1024ac27a0ecSDave Kleikamp case Opt_err_panic: 1025ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 1026ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 1027ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_PANIC); 1028ac27a0ecSDave Kleikamp break; 1029ac27a0ecSDave Kleikamp case Opt_err_ro: 1030ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 1031ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 1032ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_RO); 1033ac27a0ecSDave Kleikamp break; 1034ac27a0ecSDave Kleikamp case Opt_err_cont: 1035ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 1036ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 1037ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_CONT); 1038ac27a0ecSDave Kleikamp break; 1039ac27a0ecSDave Kleikamp case Opt_nouid32: 1040ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NO_UID32); 1041ac27a0ecSDave Kleikamp break; 1042ac27a0ecSDave Kleikamp case Opt_nocheck: 1043ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, CHECK); 1044ac27a0ecSDave Kleikamp break; 1045ac27a0ecSDave Kleikamp case Opt_debug: 1046ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, DEBUG); 1047ac27a0ecSDave Kleikamp break; 1048ac27a0ecSDave Kleikamp case Opt_oldalloc: 1049ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, OLDALLOC); 1050ac27a0ecSDave Kleikamp break; 1051ac27a0ecSDave Kleikamp case Opt_orlov: 1052ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, OLDALLOC); 1053ac27a0ecSDave Kleikamp break; 1054617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 1055ac27a0ecSDave Kleikamp case Opt_user_xattr: 1056ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, XATTR_USER); 1057ac27a0ecSDave Kleikamp break; 1058ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1059ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, XATTR_USER); 1060ac27a0ecSDave Kleikamp break; 1061ac27a0ecSDave Kleikamp #else 1062ac27a0ecSDave Kleikamp case Opt_user_xattr: 1063ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1064617ba13bSMingming Cao printk("EXT4 (no)user_xattr options not supported\n"); 1065ac27a0ecSDave Kleikamp break; 1066ac27a0ecSDave Kleikamp #endif 1067617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 1068ac27a0ecSDave Kleikamp case Opt_acl: 1069ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1070ac27a0ecSDave Kleikamp break; 1071ac27a0ecSDave Kleikamp case Opt_noacl: 1072ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1073ac27a0ecSDave Kleikamp break; 1074ac27a0ecSDave Kleikamp #else 1075ac27a0ecSDave Kleikamp case Opt_acl: 1076ac27a0ecSDave Kleikamp case Opt_noacl: 1077617ba13bSMingming Cao printk("EXT4 (no)acl options not supported\n"); 1078ac27a0ecSDave Kleikamp break; 1079ac27a0ecSDave Kleikamp #endif 1080ac27a0ecSDave Kleikamp case Opt_reservation: 1081ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1082ac27a0ecSDave Kleikamp break; 1083ac27a0ecSDave Kleikamp case Opt_noreservation: 1084ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, RESERVATION); 1085ac27a0ecSDave Kleikamp break; 1086ac27a0ecSDave Kleikamp case Opt_journal_update: 1087ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1088ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1089ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1090ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1091ac27a0ecSDave Kleikamp journal file. */ 1092ac27a0ecSDave Kleikamp if (is_remount) { 1093617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1094ac27a0ecSDave Kleikamp "journal on remount\n"); 1095ac27a0ecSDave Kleikamp return 0; 1096ac27a0ecSDave Kleikamp } 1097ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); 1098ac27a0ecSDave Kleikamp break; 1099ac27a0ecSDave Kleikamp case Opt_journal_inum: 1100ac27a0ecSDave Kleikamp if (is_remount) { 1101617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1102ac27a0ecSDave Kleikamp "journal on remount\n"); 1103ac27a0ecSDave Kleikamp return 0; 1104ac27a0ecSDave Kleikamp } 1105ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1106ac27a0ecSDave Kleikamp return 0; 1107ac27a0ecSDave Kleikamp *inum = option; 1108ac27a0ecSDave Kleikamp break; 1109ac27a0ecSDave Kleikamp case Opt_journal_dev: 1110ac27a0ecSDave Kleikamp if (is_remount) { 1111617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1112ac27a0ecSDave Kleikamp "journal on remount\n"); 1113ac27a0ecSDave Kleikamp return 0; 1114ac27a0ecSDave Kleikamp } 1115ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1116ac27a0ecSDave Kleikamp return 0; 1117ac27a0ecSDave Kleikamp *journal_devnum = option; 1118ac27a0ecSDave Kleikamp break; 1119818d276cSGirish Shilamkar case Opt_journal_checksum: 1120818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1121818d276cSGirish Shilamkar break; 1122818d276cSGirish Shilamkar case Opt_journal_async_commit: 1123818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1124818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1125818d276cSGirish Shilamkar break; 1126ac27a0ecSDave Kleikamp case Opt_noload: 1127ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NOLOAD); 1128ac27a0ecSDave Kleikamp break; 1129ac27a0ecSDave Kleikamp case Opt_commit: 1130ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1131ac27a0ecSDave Kleikamp return 0; 1132ac27a0ecSDave Kleikamp if (option < 0) 1133ac27a0ecSDave Kleikamp return 0; 1134ac27a0ecSDave Kleikamp if (option == 0) 1135cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1136ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1137ac27a0ecSDave Kleikamp break; 1138ac27a0ecSDave Kleikamp case Opt_data_journal: 1139617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1140ac27a0ecSDave Kleikamp goto datacheck; 1141ac27a0ecSDave Kleikamp case Opt_data_ordered: 1142617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1143ac27a0ecSDave Kleikamp goto datacheck; 1144ac27a0ecSDave Kleikamp case Opt_data_writeback: 1145617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1146ac27a0ecSDave Kleikamp datacheck: 1147ac27a0ecSDave Kleikamp if (is_remount) { 1148617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1149ac27a0ecSDave Kleikamp != data_opt) { 1150ac27a0ecSDave Kleikamp printk(KERN_ERR 1151617ba13bSMingming Cao "EXT4-fs: cannot change data " 1152ac27a0ecSDave Kleikamp "mode on remount\n"); 1153ac27a0ecSDave Kleikamp return 0; 1154ac27a0ecSDave Kleikamp } 1155ac27a0ecSDave Kleikamp } else { 1156617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1157ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1158ac27a0ecSDave Kleikamp } 1159ac27a0ecSDave Kleikamp break; 1160ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1161ac27a0ecSDave Kleikamp case Opt_usrjquota: 1162ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1163ac27a0ecSDave Kleikamp goto set_qf_name; 1164ac27a0ecSDave Kleikamp case Opt_grpjquota: 1165ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1166ac27a0ecSDave Kleikamp set_qf_name: 1167ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 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: 1205ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1206617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 1207ac27a0ecSDave Kleikamp "journalled quota options when " 1208ac27a0ecSDave Kleikamp "quota turned on.\n"); 1209ac27a0ecSDave Kleikamp return 0; 1210ac27a0ecSDave Kleikamp } 1211ac27a0ecSDave Kleikamp /* 1212ac27a0ecSDave Kleikamp * The space will be released later when all options 1213ac27a0ecSDave Kleikamp * are confirmed to be correct 1214ac27a0ecSDave Kleikamp */ 1215ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1216ac27a0ecSDave Kleikamp break; 1217ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1218ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = QFMT_VFS_OLD; 1219ac27a0ecSDave Kleikamp break; 1220ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1221ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = QFMT_VFS_V0; 1222ac27a0ecSDave Kleikamp break; 1223ac27a0ecSDave Kleikamp case Opt_quota: 1224ac27a0ecSDave Kleikamp case Opt_usrquota: 1225ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1226ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1227ac27a0ecSDave Kleikamp break; 1228ac27a0ecSDave Kleikamp case Opt_grpquota: 1229ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1230ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1231ac27a0ecSDave Kleikamp break; 1232ac27a0ecSDave Kleikamp case Opt_noquota: 1233ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1234617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1235ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1236ac27a0ecSDave Kleikamp return 0; 1237ac27a0ecSDave Kleikamp } 1238ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1239ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1240ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1241ac27a0ecSDave Kleikamp break; 1242ac27a0ecSDave Kleikamp #else 1243ac27a0ecSDave Kleikamp case Opt_quota: 1244ac27a0ecSDave Kleikamp case Opt_usrquota: 1245ac27a0ecSDave Kleikamp case Opt_grpquota: 1246ac27a0ecSDave Kleikamp case Opt_usrjquota: 1247ac27a0ecSDave Kleikamp case Opt_grpjquota: 1248ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1249ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1250ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1251ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1252ac27a0ecSDave Kleikamp printk(KERN_ERR 1253617ba13bSMingming Cao "EXT4-fs: journalled quota options not " 1254ac27a0ecSDave Kleikamp "supported.\n"); 1255ac27a0ecSDave Kleikamp break; 1256ac27a0ecSDave Kleikamp case Opt_noquota: 1257ac27a0ecSDave Kleikamp break; 1258ac27a0ecSDave Kleikamp #endif 1259ac27a0ecSDave Kleikamp case Opt_abort: 1260ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1261ac27a0ecSDave Kleikamp break; 1262ac27a0ecSDave Kleikamp case Opt_barrier: 1263ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1264ac27a0ecSDave Kleikamp return 0; 1265ac27a0ecSDave Kleikamp if (option) 1266ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1267ac27a0ecSDave Kleikamp else 1268ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1269ac27a0ecSDave Kleikamp break; 1270ac27a0ecSDave Kleikamp case Opt_ignore: 1271ac27a0ecSDave Kleikamp break; 1272ac27a0ecSDave Kleikamp case Opt_resize: 1273ac27a0ecSDave Kleikamp if (!is_remount) { 1274617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1275ac27a0ecSDave Kleikamp "for remount\n"); 1276ac27a0ecSDave Kleikamp return 0; 1277ac27a0ecSDave Kleikamp } 1278ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1279ac27a0ecSDave Kleikamp return 0; 1280ac27a0ecSDave Kleikamp *n_blocks_count = option; 1281ac27a0ecSDave Kleikamp break; 1282ac27a0ecSDave Kleikamp case Opt_nobh: 1283ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1284ac27a0ecSDave Kleikamp break; 1285ac27a0ecSDave Kleikamp case Opt_bh: 1286ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1287ac27a0ecSDave Kleikamp break; 1288a86c6181SAlex Tomas case Opt_extents: 1289a86c6181SAlex Tomas set_opt (sbi->s_mount_opt, EXTENTS); 1290a86c6181SAlex Tomas break; 12911e2462f9SMingming Cao case Opt_noextents: 12921e2462f9SMingming Cao clear_opt (sbi->s_mount_opt, EXTENTS); 12931e2462f9SMingming Cao break; 129425ec56b5SJean Noel Cordenner case Opt_i_version: 129525ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 129625ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 129725ec56b5SJean Noel Cordenner break; 1298c9de560dSAlex Tomas case Opt_mballoc: 1299c9de560dSAlex Tomas set_opt(sbi->s_mount_opt, MBALLOC); 1300c9de560dSAlex Tomas break; 1301c9de560dSAlex Tomas case Opt_nomballoc: 1302c9de560dSAlex Tomas clear_opt(sbi->s_mount_opt, MBALLOC); 1303c9de560dSAlex Tomas break; 1304c9de560dSAlex Tomas case Opt_stripe: 1305c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1306c9de560dSAlex Tomas return 0; 1307c9de560dSAlex Tomas if (option < 0) 1308c9de560dSAlex Tomas return 0; 1309c9de560dSAlex Tomas sbi->s_stripe = option; 1310c9de560dSAlex Tomas break; 1311ac27a0ecSDave Kleikamp default: 1312ac27a0ecSDave Kleikamp printk (KERN_ERR 1313617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1314ac27a0ecSDave Kleikamp "or missing value\n", p); 1315ac27a0ecSDave Kleikamp return 0; 1316ac27a0ecSDave Kleikamp } 1317ac27a0ecSDave Kleikamp } 1318ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1319ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1320617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1321ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1322ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1323ac27a0ecSDave Kleikamp 1324617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1325ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1326ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1327ac27a0ecSDave Kleikamp 1328ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1329617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1330ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1331617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1332617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1333ac27a0ecSDave Kleikamp "format mixing.\n"); 1334ac27a0ecSDave Kleikamp return 0; 1335ac27a0ecSDave Kleikamp } 1336ac27a0ecSDave Kleikamp 1337ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1338617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journalled quota format " 1339ac27a0ecSDave Kleikamp "not specified.\n"); 1340ac27a0ecSDave Kleikamp return 0; 1341ac27a0ecSDave Kleikamp } 1342ac27a0ecSDave Kleikamp } else { 1343ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1344617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journalled quota format " 1345ac27a0ecSDave Kleikamp "specified with no journalling " 1346ac27a0ecSDave Kleikamp "enabled.\n"); 1347ac27a0ecSDave Kleikamp return 0; 1348ac27a0ecSDave Kleikamp } 1349ac27a0ecSDave Kleikamp } 1350ac27a0ecSDave Kleikamp #endif 1351ac27a0ecSDave Kleikamp return 1; 1352ac27a0ecSDave Kleikamp } 1353ac27a0ecSDave Kleikamp 1354617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1355ac27a0ecSDave Kleikamp int read_only) 1356ac27a0ecSDave Kleikamp { 1357617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1358ac27a0ecSDave Kleikamp int res = 0; 1359ac27a0ecSDave Kleikamp 1360617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1361617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs warning: revision level too high, " 1362ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1363ac27a0ecSDave Kleikamp res = MS_RDONLY; 1364ac27a0ecSDave Kleikamp } 1365ac27a0ecSDave Kleikamp if (read_only) 1366ac27a0ecSDave Kleikamp return res; 1367617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1368617ba13bSMingming Cao printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1369ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1370617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1371ac27a0ecSDave Kleikamp printk (KERN_WARNING 1372617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1373ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1374ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1375ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1376ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1377ac27a0ecSDave Kleikamp printk (KERN_WARNING 1378617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1379ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1380ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1381ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1382ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1383ac27a0ecSDave Kleikamp printk (KERN_WARNING 1384617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1385ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1386ac27a0ecSDave Kleikamp #if 0 1387ac27a0ecSDave Kleikamp /* @@@ We _will_ want to clear the valid bit if we find 138863f57933SAndrew Morton * inconsistencies, to force a fsck at reboot. But for 138963f57933SAndrew Morton * a plain journaled filesystem we can keep it set as 139063f57933SAndrew Morton * valid forever! :) 139163f57933SAndrew Morton */ 1392617ba13bSMingming Cao es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT4_VALID_FS); 1393ac27a0ecSDave Kleikamp #endif 1394ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1395617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1396ac27a0ecSDave Kleikamp es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1); 1397ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1398617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 1399617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1400ac27a0ecSDave Kleikamp 1401617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1402ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1403617ba13bSMingming Cao printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " 1404ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1405ac27a0ecSDave Kleikamp sb->s_blocksize, 1406ac27a0ecSDave Kleikamp sbi->s_groups_count, 1407617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1408617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1409ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1410ac27a0ecSDave Kleikamp 1411617ba13bSMingming Cao printk(KERN_INFO "EXT4 FS on %s, ", sb->s_id); 1412617ba13bSMingming Cao if (EXT4_SB(sb)->s_journal->j_inode == NULL) { 1413ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 1414ac27a0ecSDave Kleikamp 1415ac27a0ecSDave Kleikamp printk("external journal on %s\n", 1416617ba13bSMingming Cao bdevname(EXT4_SB(sb)->s_journal->j_dev, b)); 1417ac27a0ecSDave Kleikamp } else { 1418ac27a0ecSDave Kleikamp printk("internal journal\n"); 1419ac27a0ecSDave Kleikamp } 1420ac27a0ecSDave Kleikamp return res; 1421ac27a0ecSDave Kleikamp } 1422ac27a0ecSDave Kleikamp 1423717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1424717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1425717d50e4SAndreas Dilger { 1426717d50e4SAndreas Dilger __u16 crc = 0; 1427717d50e4SAndreas Dilger 1428717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1429717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1430717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1431717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1432717d50e4SAndreas Dilger 1433717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1434717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1435717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1436717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1437717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1438717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1439717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1440717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1441717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1442717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1443717d50e4SAndreas Dilger offset); 1444717d50e4SAndreas Dilger } 1445717d50e4SAndreas Dilger 1446717d50e4SAndreas Dilger return cpu_to_le16(crc); 1447717d50e4SAndreas Dilger } 1448717d50e4SAndreas Dilger 1449717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1450717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1451717d50e4SAndreas Dilger { 1452717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1453717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1454717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1455717d50e4SAndreas Dilger return 0; 1456717d50e4SAndreas Dilger 1457717d50e4SAndreas Dilger return 1; 1458717d50e4SAndreas Dilger } 1459717d50e4SAndreas Dilger 1460ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1461617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1462ac27a0ecSDave Kleikamp { 1463617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1464617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1465617ba13bSMingming Cao ext4_fsblk_t last_block; 1466bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1467bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1468bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1469ce421581SJose R. Santos int flexbg_flag = 0; 1470fd2d4291SAvantika Mathur ext4_group_t i; 1471ac27a0ecSDave Kleikamp 1472ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1473ce421581SJose R. Santos flexbg_flag = 1; 1474ce421581SJose R. Santos 1475617ba13bSMingming Cao ext4_debug ("Checking group descriptors"); 1476ac27a0ecSDave Kleikamp 1477*197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1478*197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1479*197cd65aSAkinobu Mita 1480ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1481bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1482ac27a0ecSDave Kleikamp else 1483ac27a0ecSDave Kleikamp last_block = first_block + 1484617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1485ac27a0ecSDave Kleikamp 14868fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 1487bd81d8eeSLaurent Vivier if (block_bitmap < first_block || block_bitmap > last_block) 1488ac27a0ecSDave Kleikamp { 1489617ba13bSMingming Cao ext4_error (sb, "ext4_check_descriptors", 1490fd2d4291SAvantika Mathur "Block bitmap for group %lu" 14912ae02107SMingming Cao " not in group (block %llu)!", 1492bd81d8eeSLaurent Vivier i, block_bitmap); 1493ac27a0ecSDave Kleikamp return 0; 1494ac27a0ecSDave Kleikamp } 14958fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 1496bd81d8eeSLaurent Vivier if (inode_bitmap < first_block || inode_bitmap > last_block) 1497ac27a0ecSDave Kleikamp { 1498617ba13bSMingming Cao ext4_error (sb, "ext4_check_descriptors", 1499fd2d4291SAvantika Mathur "Inode bitmap for group %lu" 15002ae02107SMingming Cao " not in group (block %llu)!", 1501bd81d8eeSLaurent Vivier i, inode_bitmap); 1502ac27a0ecSDave Kleikamp return 0; 1503ac27a0ecSDave Kleikamp } 15048fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1505bd81d8eeSLaurent Vivier if (inode_table < first_block || 1506780dcdb2SEric Sandeen inode_table + sbi->s_itb_per_group - 1 > last_block) 1507ac27a0ecSDave Kleikamp { 1508617ba13bSMingming Cao ext4_error (sb, "ext4_check_descriptors", 1509fd2d4291SAvantika Mathur "Inode table for group %lu" 15102ae02107SMingming Cao " not in group (block %llu)!", 1511bd81d8eeSLaurent Vivier i, inode_table); 1512ac27a0ecSDave Kleikamp return 0; 1513ac27a0ecSDave Kleikamp } 1514717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1515717d50e4SAndreas Dilger ext4_error(sb, __FUNCTION__, 1516fd2d4291SAvantika Mathur "Checksum for group %lu failed (%u!=%u)\n", 1517fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1518fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 1519717d50e4SAndreas Dilger return 0; 1520717d50e4SAndreas Dilger } 1521ce421581SJose R. Santos if (!flexbg_flag) 1522617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1523ac27a0ecSDave Kleikamp } 1524ac27a0ecSDave Kleikamp 1525bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1526617ba13bSMingming Cao sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb)); 1527ac27a0ecSDave Kleikamp return 1; 1528ac27a0ecSDave Kleikamp } 1529ac27a0ecSDave Kleikamp 1530617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1531ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1532ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1533ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1534ac27a0ecSDave Kleikamp * 1535ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1536ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1537ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1538ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1539ac27a0ecSDave Kleikamp * 1540ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1541ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1542ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1543617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1544ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1545ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1546ac27a0ecSDave Kleikamp */ 1547617ba13bSMingming Cao static void ext4_orphan_cleanup (struct super_block * sb, 1548617ba13bSMingming Cao struct ext4_super_block * es) 1549ac27a0ecSDave Kleikamp { 1550ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1551ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1552ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1553ac27a0ecSDave Kleikamp int i; 1554ac27a0ecSDave Kleikamp #endif 1555ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1556ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1557ac27a0ecSDave Kleikamp return; 1558ac27a0ecSDave Kleikamp } 1559ac27a0ecSDave Kleikamp 1560a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1561a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1562a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1563a8f48a95SEric Sandeen return; 1564a8f48a95SEric Sandeen } 1565a8f48a95SEric Sandeen 1566617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1567ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1568ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1569ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1570ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1571ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1572ac27a0ecSDave Kleikamp return; 1573ac27a0ecSDave Kleikamp } 1574ac27a0ecSDave Kleikamp 1575ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1576617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1577ac27a0ecSDave Kleikamp sb->s_id); 1578ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1579ac27a0ecSDave Kleikamp } 1580ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1581ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1582ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1583ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1584ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1585617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1586617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1587ac27a0ecSDave Kleikamp if (ret < 0) 1588ac27a0ecSDave Kleikamp printk(KERN_ERR 1589617ba13bSMingming Cao "EXT4-fs: Cannot turn on journalled " 1590ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1591ac27a0ecSDave Kleikamp } 1592ac27a0ecSDave Kleikamp } 1593ac27a0ecSDave Kleikamp #endif 1594ac27a0ecSDave Kleikamp 1595ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1596ac27a0ecSDave Kleikamp struct inode *inode; 1597ac27a0ecSDave Kleikamp 1598ac27a0ecSDave Kleikamp if (!(inode = 1599617ba13bSMingming Cao ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) { 1600ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1601ac27a0ecSDave Kleikamp break; 1602ac27a0ecSDave Kleikamp } 1603ac27a0ecSDave Kleikamp 1604617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1605ac27a0ecSDave Kleikamp DQUOT_INIT(inode); 1606ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1607ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1608ac27a0ecSDave Kleikamp "%s: truncating inode %lu to %Ld bytes\n", 1609ac27a0ecSDave Kleikamp __FUNCTION__, inode->i_ino, inode->i_size); 1610ac27a0ecSDave Kleikamp jbd_debug(2, "truncating inode %lu to %Ld bytes\n", 1611ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1612617ba13bSMingming Cao ext4_truncate(inode); 1613ac27a0ecSDave Kleikamp nr_truncates++; 1614ac27a0ecSDave Kleikamp } else { 1615ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1616ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 1617ac27a0ecSDave Kleikamp __FUNCTION__, inode->i_ino); 1618ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1619ac27a0ecSDave Kleikamp inode->i_ino); 1620ac27a0ecSDave Kleikamp nr_orphans++; 1621ac27a0ecSDave Kleikamp } 1622ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1623ac27a0ecSDave Kleikamp } 1624ac27a0ecSDave Kleikamp 1625ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x)==1) ? "" : "s" 1626ac27a0ecSDave Kleikamp 1627ac27a0ecSDave Kleikamp if (nr_orphans) 1628617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1629ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1630ac27a0ecSDave Kleikamp if (nr_truncates) 1631617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1632ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1633ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1634ac27a0ecSDave Kleikamp /* Turn quotas off */ 1635ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1636ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 1637ac27a0ecSDave Kleikamp vfs_quota_off(sb, i); 1638ac27a0ecSDave Kleikamp } 1639ac27a0ecSDave Kleikamp #endif 1640ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1641ac27a0ecSDave Kleikamp } 1642cd2291a4SEric Sandeen /* 1643cd2291a4SEric Sandeen * Maximal extent format file size. 1644cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1645cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1646cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1647cd2291a4SEric Sandeen * so that won't be a limiting factor. 1648cd2291a4SEric Sandeen * 1649cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1650cd2291a4SEric Sandeen */ 1651cd2291a4SEric Sandeen static loff_t ext4_max_size(int blkbits) 1652cd2291a4SEric Sandeen { 1653cd2291a4SEric Sandeen loff_t res; 1654cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1655cd2291a4SEric Sandeen 1656cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1657cd2291a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 1658cd2291a4SEric Sandeen /* 1659cd2291a4SEric Sandeen * CONFIG_LSF is not enabled implies the inode 1660cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1661cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1662cd2291a4SEric Sandeen */ 1663cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1664cd2291a4SEric Sandeen 1665cd2291a4SEric Sandeen /* total blocks in file system block size */ 1666cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1667cd2291a4SEric Sandeen upper_limit <<= blkbits; 1668cd2291a4SEric Sandeen } 1669cd2291a4SEric Sandeen 1670cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1671cd2291a4SEric Sandeen res = 1LL << 32; 1672cd2291a4SEric Sandeen res <<= blkbits; 1673cd2291a4SEric Sandeen res -= 1; 1674cd2291a4SEric Sandeen 1675cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1676cd2291a4SEric Sandeen if (res > upper_limit) 1677cd2291a4SEric Sandeen res = upper_limit; 1678cd2291a4SEric Sandeen 1679cd2291a4SEric Sandeen return res; 1680cd2291a4SEric Sandeen } 1681ac27a0ecSDave Kleikamp 1682ac27a0ecSDave Kleikamp /* 1683cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 16840fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 16850fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1686ac27a0ecSDave Kleikamp */ 1687cd2291a4SEric Sandeen static loff_t ext4_max_bitmap_size(int bits) 1688ac27a0ecSDave Kleikamp { 1689617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 16900fc1b451SAneesh Kumar K.V int meta_blocks; 16910fc1b451SAneesh Kumar K.V loff_t upper_limit; 16920fc1b451SAneesh Kumar K.V /* This is calculated to be the largest file size for a 1693cd2291a4SEric Sandeen * dense, bitmapped file such that the total number of 1694ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 16950fc1b451SAneesh Kumar K.V * does not exceed 2^48 -1 16960fc1b451SAneesh Kumar K.V * __u32 i_blocks_lo and _u16 i_blocks_high representing the 16970fc1b451SAneesh Kumar K.V * total number of 512 bytes blocks of the file 16980fc1b451SAneesh Kumar K.V */ 16990fc1b451SAneesh Kumar K.V 17000fc1b451SAneesh Kumar K.V if (sizeof(blkcnt_t) < sizeof(u64)) { 17010fc1b451SAneesh Kumar K.V /* 17020fc1b451SAneesh Kumar K.V * CONFIG_LSF is not enabled implies the inode 17030fc1b451SAneesh Kumar K.V * i_block represent total blocks in 512 bytes 17040fc1b451SAneesh Kumar K.V * 32 == size of vfs inode i_blocks * 8 17050fc1b451SAneesh Kumar K.V */ 17060fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 17070fc1b451SAneesh Kumar K.V 17080fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 17090fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 17100fc1b451SAneesh Kumar K.V 17110fc1b451SAneesh Kumar K.V } else { 17128180a562SAneesh Kumar K.V /* 17138180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 17148180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 17158180a562SAneesh Kumar K.V * represent total number of blocks in 17168180a562SAneesh Kumar K.V * file system block size 17178180a562SAneesh Kumar K.V */ 17180fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 17190fc1b451SAneesh Kumar K.V 17200fc1b451SAneesh Kumar K.V } 17210fc1b451SAneesh Kumar K.V 17220fc1b451SAneesh Kumar K.V /* indirect blocks */ 17230fc1b451SAneesh Kumar K.V meta_blocks = 1; 17240fc1b451SAneesh Kumar K.V /* double indirect blocks */ 17250fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 17260fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 17270fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 17280fc1b451SAneesh Kumar K.V 17290fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 17300fc1b451SAneesh Kumar K.V upper_limit <<= bits; 1731ac27a0ecSDave Kleikamp 1732ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1733ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1734ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1735ac27a0ecSDave Kleikamp res <<= bits; 1736ac27a0ecSDave Kleikamp if (res > upper_limit) 1737ac27a0ecSDave Kleikamp res = upper_limit; 17380fc1b451SAneesh Kumar K.V 17390fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 17400fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 17410fc1b451SAneesh Kumar K.V 1742ac27a0ecSDave Kleikamp return res; 1743ac27a0ecSDave Kleikamp } 1744ac27a0ecSDave Kleikamp 1745617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 174670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1747ac27a0ecSDave Kleikamp { 1748617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1749fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 1750ac27a0ecSDave Kleikamp int has_super = 0; 1751ac27a0ecSDave Kleikamp 1752ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 1753ac27a0ecSDave Kleikamp 1754617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 1755ac27a0ecSDave Kleikamp nr < first_meta_bg) 175670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 1757ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 1758617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 1759ac27a0ecSDave Kleikamp has_super = 1; 1760617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 1761ac27a0ecSDave Kleikamp } 1762ac27a0ecSDave Kleikamp 1763c9de560dSAlex Tomas /** 1764c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 1765c9de560dSAlex Tomas * @sbi: In memory super block info 1766c9de560dSAlex Tomas * 1767c9de560dSAlex Tomas * If we have specified it via mount option, then 1768c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 1769c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 1770c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 1771c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 1772c9de560dSAlex Tomas * 1773c9de560dSAlex Tomas */ 1774c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 1775c9de560dSAlex Tomas { 1776c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 1777c9de560dSAlex Tomas unsigned long stripe_width = 1778c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 1779c9de560dSAlex Tomas 1780c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 1781c9de560dSAlex Tomas return sbi->s_stripe; 1782c9de560dSAlex Tomas 1783c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 1784c9de560dSAlex Tomas return stripe_width; 1785c9de560dSAlex Tomas 1786c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 1787c9de560dSAlex Tomas return stride; 1788c9de560dSAlex Tomas 1789c9de560dSAlex Tomas return 0; 1790c9de560dSAlex Tomas } 1791ac27a0ecSDave Kleikamp 1792617ba13bSMingming Cao static int ext4_fill_super (struct super_block *sb, void *data, int silent) 17931d03ec98SAneesh Kumar K.V __releases(kernel_sem) 17941d03ec98SAneesh Kumar K.V __acquires(kernel_sem) 17951d03ec98SAneesh Kumar K.V 1796ac27a0ecSDave Kleikamp { 1797ac27a0ecSDave Kleikamp struct buffer_head * bh; 1798617ba13bSMingming Cao struct ext4_super_block *es = NULL; 1799617ba13bSMingming Cao struct ext4_sb_info *sbi; 1800617ba13bSMingming Cao ext4_fsblk_t block; 1801617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 180270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 1803ac27a0ecSDave Kleikamp unsigned long offset = 0; 1804ac27a0ecSDave Kleikamp unsigned int journal_inum = 0; 1805ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 1806ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 1807ac27a0ecSDave Kleikamp struct inode *root; 1808ac27a0ecSDave Kleikamp int blocksize; 1809ac27a0ecSDave Kleikamp int db_count; 1810ac27a0ecSDave Kleikamp int i; 1811ac27a0ecSDave Kleikamp int needs_recovery; 1812ac27a0ecSDave Kleikamp __le32 features; 1813bd81d8eeSLaurent Vivier __u64 blocks_count; 1814833f4077SPeter Zijlstra int err; 1815ac27a0ecSDave Kleikamp 1816ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 1817ac27a0ecSDave Kleikamp if (!sbi) 1818ac27a0ecSDave Kleikamp return -ENOMEM; 1819ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 1820ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 1821617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 1822617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 1823d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 1824ac27a0ecSDave Kleikamp 1825ac27a0ecSDave Kleikamp unlock_kernel(); 1826ac27a0ecSDave Kleikamp 1827617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 1828ac27a0ecSDave Kleikamp if (!blocksize) { 1829617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 1830ac27a0ecSDave Kleikamp goto out_fail; 1831ac27a0ecSDave Kleikamp } 1832ac27a0ecSDave Kleikamp 1833afc7cbcaSTakashi Sato if (!sb_set_blocksize(sb, blocksize)) { 1834afc7cbcaSTakashi Sato printk(KERN_ERR "EXT4-fs: bad blocksize %d.\n", blocksize); 1835afc7cbcaSTakashi Sato goto out_fail; 1836afc7cbcaSTakashi Sato } 1837afc7cbcaSTakashi Sato 1838ac27a0ecSDave Kleikamp /* 1839617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 1840ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 1841ac27a0ecSDave Kleikamp */ 1842617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 184370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 184470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 1845ac27a0ecSDave Kleikamp } else { 184670bbb3e0SAndrew Morton logical_sb_block = sb_block; 1847ac27a0ecSDave Kleikamp } 1848ac27a0ecSDave Kleikamp 184970bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 1850617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: unable to read superblock\n"); 1851ac27a0ecSDave Kleikamp goto out_fail; 1852ac27a0ecSDave Kleikamp } 1853ac27a0ecSDave Kleikamp /* 1854ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 1855617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 1856ac27a0ecSDave Kleikamp */ 1857617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 1858ac27a0ecSDave Kleikamp sbi->s_es = es; 1859ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 1860617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 1861617ba13bSMingming Cao goto cantfind_ext4; 1862ac27a0ecSDave Kleikamp 1863ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 1864ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1865617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 1866ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1867617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 1868ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1869617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 1870ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 18712e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_XATTR 1872617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 1873ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 18742e7842b8SHugh Dickins #endif 18752e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 1876617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 1877ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 18782e7842b8SHugh Dickins #endif 1879617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 1880617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 1881617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 1882617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 1883617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 1884617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 1885ac27a0ecSDave Kleikamp 1886617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 1887ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1888bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 1889ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 1890bb4f397aSAneesh Kumar K.V else 1891bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 1892ac27a0ecSDave Kleikamp 1893ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 1894ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 1895ac27a0ecSDave Kleikamp 1896ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1897ac27a0ecSDave Kleikamp 18981e2462f9SMingming Cao /* 18991e2462f9SMingming Cao * turn on extents feature by default in ext4 filesystem 19001e2462f9SMingming Cao * User -o noextents to turn it off 19011e2462f9SMingming Cao */ 19021e2462f9SMingming Cao set_opt(sbi->s_mount_opt, EXTENTS); 19033dbd0edeSAneesh Kumar K.V /* 19043dbd0edeSAneesh Kumar K.V * turn on mballoc feature by default in ext4 filesystem 19053dbd0edeSAneesh Kumar K.V * User -o nomballoc to turn it off 19063dbd0edeSAneesh Kumar K.V */ 19073dbd0edeSAneesh Kumar K.V set_opt(sbi->s_mount_opt, MBALLOC); 19081e2462f9SMingming Cao 1909ac27a0ecSDave Kleikamp if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, 1910ac27a0ecSDave Kleikamp NULL, 0)) 1911ac27a0ecSDave Kleikamp goto failed_mount; 1912ac27a0ecSDave Kleikamp 1913ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1914617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1915ac27a0ecSDave Kleikamp 1916617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 1917617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 1918617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 1919617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 1920ac27a0ecSDave Kleikamp printk(KERN_WARNING 1921617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 1922ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1923ac27a0ecSDave Kleikamp /* 1924ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 1925ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 1926ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 1927ac27a0ecSDave Kleikamp */ 1928617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 1929ac27a0ecSDave Kleikamp if (features) { 1930617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 1931ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 1932ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 1933ac27a0ecSDave Kleikamp goto failed_mount; 1934ac27a0ecSDave Kleikamp } 1935617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 1936ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 1937617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 1938ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 1939ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 1940ac27a0ecSDave Kleikamp goto failed_mount; 1941ac27a0ecSDave Kleikamp } 19420fc1b451SAneesh Kumar K.V if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 19430fc1b451SAneesh Kumar K.V /* 19440fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 19450fc1b451SAneesh Kumar K.V * mount if kernel is build with CONFIG_LSF 19460fc1b451SAneesh Kumar K.V */ 19470fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 19480fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 19490fc1b451SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " 19500fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 19510fc1b451SAneesh Kumar K.V "without CONFIG_LSF.\n", sb->s_id); 19520fc1b451SAneesh Kumar K.V goto failed_mount; 19530fc1b451SAneesh Kumar K.V } 19540fc1b451SAneesh Kumar K.V } 1955ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 1956ac27a0ecSDave Kleikamp 1957617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 1958617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 1959ac27a0ecSDave Kleikamp printk(KERN_ERR 1960617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 1961ac27a0ecSDave Kleikamp blocksize, sb->s_id); 1962ac27a0ecSDave Kleikamp goto failed_mount; 1963ac27a0ecSDave Kleikamp } 1964ac27a0ecSDave Kleikamp 1965ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 1966ce40733cSAneesh Kumar K.V 1967ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 1968ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 1969ce40733cSAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: bad block size %d.\n", 1970ce40733cSAneesh Kumar K.V blocksize); 1971ac27a0ecSDave Kleikamp goto failed_mount; 1972ac27a0ecSDave Kleikamp } 1973ac27a0ecSDave Kleikamp 1974ac27a0ecSDave Kleikamp brelse (bh); 197570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 197670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 197770bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 1978ac27a0ecSDave Kleikamp if (!bh) { 1979ac27a0ecSDave Kleikamp printk(KERN_ERR 1980617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 1981ac27a0ecSDave Kleikamp goto failed_mount; 1982ac27a0ecSDave Kleikamp } 1983617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 1984ac27a0ecSDave Kleikamp sbi->s_es = es; 1985617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 1986ac27a0ecSDave Kleikamp printk (KERN_ERR 1987617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 1988ac27a0ecSDave Kleikamp goto failed_mount; 1989ac27a0ecSDave Kleikamp } 1990ac27a0ecSDave Kleikamp } 1991ac27a0ecSDave Kleikamp 1992e2b46574SEric Sandeen sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits); 1993617ba13bSMingming Cao sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits); 1994ac27a0ecSDave Kleikamp 1995617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 1996617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 1997617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 1998ac27a0ecSDave Kleikamp } else { 1999ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2000ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2001617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 20021330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2003ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2004ac27a0ecSDave Kleikamp printk (KERN_ERR 2005617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 2006ac27a0ecSDave Kleikamp sbi->s_inode_size); 2007ac27a0ecSDave Kleikamp goto failed_mount; 2008ac27a0ecSDave Kleikamp } 2009ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2010ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2011ac27a0ecSDave Kleikamp } 20120d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 20130d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 20148fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 20150d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2016d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 20170d1ee42fSAlexandre Ratchov printk(KERN_ERR 20188fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 20190d1ee42fSAlexandre Ratchov sbi->s_desc_size); 20200d1ee42fSAlexandre Ratchov goto failed_mount; 20210d1ee42fSAlexandre Ratchov } 20220d1ee42fSAlexandre Ratchov } else 20230d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 2024ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2025ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2026b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2027617ba13bSMingming Cao goto cantfind_ext4; 2028617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2029ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2030617ba13bSMingming Cao goto cantfind_ext4; 2031ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2032ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 20330d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2034ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2035ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2036e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2037e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 2038ac27a0ecSDave Kleikamp for (i=0; i < 4; i++) 2039ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2040ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2041ac27a0ecSDave Kleikamp 2042ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2043ac27a0ecSDave Kleikamp printk (KERN_ERR 2044617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 2045ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2046ac27a0ecSDave Kleikamp goto failed_mount; 2047ac27a0ecSDave Kleikamp } 2048ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2049ac27a0ecSDave Kleikamp printk (KERN_ERR 2050617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 2051ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2052ac27a0ecSDave Kleikamp goto failed_mount; 2053ac27a0ecSDave Kleikamp } 2054ac27a0ecSDave Kleikamp 2055bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2056ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2057617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 2058ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 2059ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 2060617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 2061ac27a0ecSDave Kleikamp "enabled\n"); 2062ac27a0ecSDave Kleikamp goto failed_mount; 2063ac27a0ecSDave Kleikamp } 2064ac27a0ecSDave Kleikamp 2065617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2066617ba13bSMingming Cao goto cantfind_ext4; 2067e7c95593SEric Sandeen 2068e7c95593SEric Sandeen /* ensure blocks_count calculation below doesn't sign-extend */ 2069e7c95593SEric Sandeen if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) < 2070e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block) + 1) { 2071e7c95593SEric Sandeen printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, " 2072e7c95593SEric Sandeen "first data block %u, blocks per group %lu\n", 2073e7c95593SEric Sandeen ext4_blocks_count(es), 2074e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 2075e7c95593SEric Sandeen EXT4_BLOCKS_PER_GROUP(sb)); 2076e7c95593SEric Sandeen goto failed_mount; 2077e7c95593SEric Sandeen } 2078bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2079bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2080bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2081bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 2082bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2083617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2084617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2085ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), 2086ac27a0ecSDave Kleikamp GFP_KERNEL); 2087ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2088617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: not enough memory\n"); 2089ac27a0ecSDave Kleikamp goto failed_mount; 2090ac27a0ecSDave Kleikamp } 2091ac27a0ecSDave Kleikamp 2092ac27a0ecSDave Kleikamp bgl_lock_init(&sbi->s_blockgroup_lock); 2093ac27a0ecSDave Kleikamp 2094ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 209570bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2096ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2097ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2098617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: " 2099ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 2100ac27a0ecSDave Kleikamp db_count = i; 2101ac27a0ecSDave Kleikamp goto failed_mount2; 2102ac27a0ecSDave Kleikamp } 2103ac27a0ecSDave Kleikamp } 2104617ba13bSMingming Cao if (!ext4_check_descriptors (sb)) { 2105617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 2106ac27a0ecSDave Kleikamp goto failed_mount2; 2107ac27a0ecSDave Kleikamp } 2108ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2109ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2110ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2111ac27a0ecSDave Kleikamp 2112833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2113617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2114833f4077SPeter Zijlstra if (!err) { 2115833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2116617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2117833f4077SPeter Zijlstra } 2118833f4077SPeter Zijlstra if (!err) { 2119833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2120617ba13bSMingming Cao ext4_count_dirs(sb)); 2121833f4077SPeter Zijlstra } 2122833f4077SPeter Zijlstra if (err) { 2123833f4077SPeter Zijlstra printk(KERN_ERR "EXT4-fs: insufficient memory\n"); 2124833f4077SPeter Zijlstra goto failed_mount3; 2125833f4077SPeter Zijlstra } 2126ac27a0ecSDave Kleikamp 2127ac27a0ecSDave Kleikamp /* per fileystem reservation list head & lock */ 2128ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_rsv_window_lock); 2129ac27a0ecSDave Kleikamp sbi->s_rsv_window_root = RB_ROOT; 2130ac27a0ecSDave Kleikamp /* Add a single, static dummy reservation to the start of the 2131ac27a0ecSDave Kleikamp * reservation window list --- it gives us a placeholder for 2132ac27a0ecSDave Kleikamp * append-at-start-of-list which makes the allocation logic 2133ac27a0ecSDave Kleikamp * _much_ simpler. */ 2134617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 2135617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 2136ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_alloc_hit = 0; 2137ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_goal_size = 0; 2138617ba13bSMingming Cao ext4_rsv_window_add(sb, &sbi->s_rsv_window_head); 2139ac27a0ecSDave Kleikamp 2140c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2141c9de560dSAlex Tomas 2142ac27a0ecSDave Kleikamp /* 2143ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2144ac27a0ecSDave Kleikamp */ 2145617ba13bSMingming Cao sb->s_op = &ext4_sops; 2146617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2147617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2148ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2149617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2150617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2151ac27a0ecSDave Kleikamp #endif 2152ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 2153ac27a0ecSDave Kleikamp 2154ac27a0ecSDave Kleikamp sb->s_root = NULL; 2155ac27a0ecSDave Kleikamp 2156ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2157617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2158617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2159ac27a0ecSDave Kleikamp 2160ac27a0ecSDave Kleikamp /* 2161ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2162ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2163ac27a0ecSDave Kleikamp */ 2164ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2165617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2166617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2167ac27a0ecSDave Kleikamp goto failed_mount3; 2168ac27a0ecSDave Kleikamp } else if (journal_inum) { 2169617ba13bSMingming Cao if (ext4_create_journal(sb, es, journal_inum)) 2170ac27a0ecSDave Kleikamp goto failed_mount3; 2171ac27a0ecSDave Kleikamp } else { 2172ac27a0ecSDave Kleikamp if (!silent) 2173ac27a0ecSDave Kleikamp printk (KERN_ERR 2174617ba13bSMingming Cao "ext4: No journal on filesystem on %s\n", 2175ac27a0ecSDave Kleikamp sb->s_id); 2176ac27a0ecSDave Kleikamp goto failed_mount3; 2177ac27a0ecSDave Kleikamp } 2178ac27a0ecSDave Kleikamp 2179eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2180eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2181eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2182eb40a09cSJose R. Santos printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); 2183eb40a09cSJose R. Santos goto failed_mount4; 2184eb40a09cSJose R. Santos } 2185eb40a09cSJose R. Santos 2186818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2187818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2188818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2189818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2190818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2191818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2192818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2193818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2194818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2195818d276cSGirish Shilamkar } else { 2196818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2197818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2198818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2199818d276cSGirish Shilamkar } 2200818d276cSGirish Shilamkar 2201ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2202ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2203ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2204ac27a0ecSDave Kleikamp case 0: 2205ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 220663f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 220763f57933SAndrew Morton * cope, else JOURNAL_DATA 220863f57933SAndrew Morton */ 2209dab291afSMingming Cao if (jbd2_journal_check_available_features 2210dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2211ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2212ac27a0ecSDave Kleikamp else 2213ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2214ac27a0ecSDave Kleikamp break; 2215ac27a0ecSDave Kleikamp 2216617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2217617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2218dab291afSMingming Cao if (!jbd2_journal_check_available_features 2219dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2220617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 2221ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 2222ac27a0ecSDave Kleikamp goto failed_mount4; 2223ac27a0ecSDave Kleikamp } 2224ac27a0ecSDave Kleikamp default: 2225ac27a0ecSDave Kleikamp break; 2226ac27a0ecSDave Kleikamp } 2227ac27a0ecSDave Kleikamp 2228ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2229617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2230617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 2231ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 2232ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2233ac27a0ecSDave Kleikamp } 2234ac27a0ecSDave Kleikamp } 2235ac27a0ecSDave Kleikamp /* 2236dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2237ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2238ac27a0ecSDave Kleikamp */ 2239ac27a0ecSDave Kleikamp 2240617ba13bSMingming Cao root = iget(sb, EXT4_ROOT_INO); 2241ac27a0ecSDave Kleikamp sb->s_root = d_alloc_root(root); 2242ac27a0ecSDave Kleikamp if (!sb->s_root) { 2243617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 2244ac27a0ecSDave Kleikamp iput(root); 2245ac27a0ecSDave Kleikamp goto failed_mount4; 2246ac27a0ecSDave Kleikamp } 2247ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 2248ac27a0ecSDave Kleikamp dput(sb->s_root); 2249ac27a0ecSDave Kleikamp sb->s_root = NULL; 2250617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 2251ac27a0ecSDave Kleikamp goto failed_mount4; 2252ac27a0ecSDave Kleikamp } 2253ac27a0ecSDave Kleikamp 2254617ba13bSMingming Cao ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY); 2255ef7f3835SKalpak Shah 2256ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2257ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2258ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2259ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2260ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2261ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2262ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2263ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2264ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2265ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2266ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2267ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2268ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2269ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2270ef7f3835SKalpak Shah } 2271ef7f3835SKalpak Shah } 2272ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2273ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2274ef7f3835SKalpak Shah sbi->s_inode_size) { 2275ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2276ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2277ef7f3835SKalpak Shah printk(KERN_INFO "EXT4-fs: required extra inode space not" 2278ef7f3835SKalpak Shah "available.\n"); 2279ef7f3835SKalpak Shah } 2280ef7f3835SKalpak Shah 2281ac27a0ecSDave Kleikamp /* 2282ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 2283ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 2284ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 2285ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 2286ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 2287ac27a0ecSDave Kleikamp * superblock lock. 2288ac27a0ecSDave Kleikamp */ 2289617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2290617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2291617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 2292ac27a0ecSDave Kleikamp if (needs_recovery) 2293617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: recovery complete.\n"); 2294617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 2295617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", 2296617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": 2297617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": 2298ac27a0ecSDave Kleikamp "writeback"); 2299ac27a0ecSDave Kleikamp 2300a86c6181SAlex Tomas ext4_ext_init(sb); 2301c9de560dSAlex Tomas ext4_mb_init(sb, needs_recovery); 2302a86c6181SAlex Tomas 2303ac27a0ecSDave Kleikamp lock_kernel(); 2304ac27a0ecSDave Kleikamp return 0; 2305ac27a0ecSDave Kleikamp 2306617ba13bSMingming Cao cantfind_ext4: 2307ac27a0ecSDave Kleikamp if (!silent) 2308617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 2309ac27a0ecSDave Kleikamp sb->s_id); 2310ac27a0ecSDave Kleikamp goto failed_mount; 2311ac27a0ecSDave Kleikamp 2312ac27a0ecSDave Kleikamp failed_mount4: 2313dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 2314ac27a0ecSDave Kleikamp failed_mount3: 2315ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2316ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2317ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 2318ac27a0ecSDave Kleikamp failed_mount2: 2319ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2320ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2321ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2322ac27a0ecSDave Kleikamp failed_mount: 2323ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2324ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2325ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2326ac27a0ecSDave Kleikamp #endif 2327617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2328ac27a0ecSDave Kleikamp brelse(bh); 2329ac27a0ecSDave Kleikamp out_fail: 2330ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2331ac27a0ecSDave Kleikamp kfree(sbi); 2332ac27a0ecSDave Kleikamp lock_kernel(); 2333ac27a0ecSDave Kleikamp return -EINVAL; 2334ac27a0ecSDave Kleikamp } 2335ac27a0ecSDave Kleikamp 2336ac27a0ecSDave Kleikamp /* 2337ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2338ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2339ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2340ac27a0ecSDave Kleikamp */ 2341617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2342ac27a0ecSDave Kleikamp { 2343617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2344ac27a0ecSDave Kleikamp 2345ac27a0ecSDave Kleikamp if (sbi->s_commit_interval) 2346ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 2347617ba13bSMingming Cao /* We could also set up an ext4-specific default for the commit 2348ac27a0ecSDave Kleikamp * interval here, but for now we'll just fall back to the jbd 2349ac27a0ecSDave Kleikamp * default. */ 2350ac27a0ecSDave Kleikamp 2351ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2352ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2353dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2354ac27a0ecSDave Kleikamp else 2355dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 2356ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2357ac27a0ecSDave Kleikamp } 2358ac27a0ecSDave Kleikamp 2359617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2360ac27a0ecSDave Kleikamp unsigned int journal_inum) 2361ac27a0ecSDave Kleikamp { 2362ac27a0ecSDave Kleikamp struct inode *journal_inode; 2363ac27a0ecSDave Kleikamp journal_t *journal; 2364ac27a0ecSDave Kleikamp 2365ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2366ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2367ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2368ac27a0ecSDave Kleikamp 2369ac27a0ecSDave Kleikamp journal_inode = iget(sb, journal_inum); 2370ac27a0ecSDave Kleikamp if (!journal_inode) { 2371617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 2372ac27a0ecSDave Kleikamp return NULL; 2373ac27a0ecSDave Kleikamp } 2374ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2375ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2376ac27a0ecSDave Kleikamp iput(journal_inode); 2377617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 2378ac27a0ecSDave Kleikamp return NULL; 2379ac27a0ecSDave Kleikamp } 2380ac27a0ecSDave Kleikamp 2381ac27a0ecSDave Kleikamp jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", 2382ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 2383ac27a0ecSDave Kleikamp if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) { 2384617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 2385ac27a0ecSDave Kleikamp iput(journal_inode); 2386ac27a0ecSDave Kleikamp return NULL; 2387ac27a0ecSDave Kleikamp } 2388ac27a0ecSDave Kleikamp 2389dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2390ac27a0ecSDave Kleikamp if (!journal) { 2391617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 2392ac27a0ecSDave Kleikamp iput(journal_inode); 2393ac27a0ecSDave Kleikamp return NULL; 2394ac27a0ecSDave Kleikamp } 2395ac27a0ecSDave Kleikamp journal->j_private = sb; 2396617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2397ac27a0ecSDave Kleikamp return journal; 2398ac27a0ecSDave Kleikamp } 2399ac27a0ecSDave Kleikamp 2400617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 2401ac27a0ecSDave Kleikamp dev_t j_dev) 2402ac27a0ecSDave Kleikamp { 2403ac27a0ecSDave Kleikamp struct buffer_head * bh; 2404ac27a0ecSDave Kleikamp journal_t *journal; 2405617ba13bSMingming Cao ext4_fsblk_t start; 2406617ba13bSMingming Cao ext4_fsblk_t len; 2407ac27a0ecSDave Kleikamp int hblock, blocksize; 2408617ba13bSMingming Cao ext4_fsblk_t sb_block; 2409ac27a0ecSDave Kleikamp unsigned long offset; 2410617ba13bSMingming Cao struct ext4_super_block * es; 2411ac27a0ecSDave Kleikamp struct block_device *bdev; 2412ac27a0ecSDave Kleikamp 2413617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 2414ac27a0ecSDave Kleikamp if (bdev == NULL) 2415ac27a0ecSDave Kleikamp return NULL; 2416ac27a0ecSDave Kleikamp 2417ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 2418ac27a0ecSDave Kleikamp printk(KERN_ERR 2419617ba13bSMingming Cao "EXT4: failed to claim external journal device.\n"); 2420ac27a0ecSDave Kleikamp blkdev_put(bdev); 2421ac27a0ecSDave Kleikamp return NULL; 2422ac27a0ecSDave Kleikamp } 2423ac27a0ecSDave Kleikamp 2424ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2425ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2426ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2427ac27a0ecSDave Kleikamp printk(KERN_ERR 2428617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2429ac27a0ecSDave Kleikamp goto out_bdev; 2430ac27a0ecSDave Kleikamp } 2431ac27a0ecSDave Kleikamp 2432617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2433617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2434ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2435ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2436617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2437ac27a0ecSDave Kleikamp "external journal\n"); 2438ac27a0ecSDave Kleikamp goto out_bdev; 2439ac27a0ecSDave Kleikamp } 2440ac27a0ecSDave Kleikamp 2441617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2442617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2443ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2444617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 2445617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 2446ac27a0ecSDave Kleikamp "bad superblock\n"); 2447ac27a0ecSDave Kleikamp brelse(bh); 2448ac27a0ecSDave Kleikamp goto out_bdev; 2449ac27a0ecSDave Kleikamp } 2450ac27a0ecSDave Kleikamp 2451617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 2452617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 2453ac27a0ecSDave Kleikamp brelse(bh); 2454ac27a0ecSDave Kleikamp goto out_bdev; 2455ac27a0ecSDave Kleikamp } 2456ac27a0ecSDave Kleikamp 2457bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 2458ac27a0ecSDave Kleikamp start = sb_block + 1; 2459ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 2460ac27a0ecSDave Kleikamp 2461dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 2462ac27a0ecSDave Kleikamp start, len, blocksize); 2463ac27a0ecSDave Kleikamp if (!journal) { 2464617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 2465ac27a0ecSDave Kleikamp goto out_bdev; 2466ac27a0ecSDave Kleikamp } 2467ac27a0ecSDave Kleikamp journal->j_private = sb; 2468ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 2469ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 2470ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 2471617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 2472ac27a0ecSDave Kleikamp goto out_journal; 2473ac27a0ecSDave Kleikamp } 2474ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 2475617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 2476ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 2477ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 2478ac27a0ecSDave Kleikamp goto out_journal; 2479ac27a0ecSDave Kleikamp } 2480617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 2481617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2482ac27a0ecSDave Kleikamp return journal; 2483ac27a0ecSDave Kleikamp out_journal: 2484dab291afSMingming Cao jbd2_journal_destroy(journal); 2485ac27a0ecSDave Kleikamp out_bdev: 2486617ba13bSMingming Cao ext4_blkdev_put(bdev); 2487ac27a0ecSDave Kleikamp return NULL; 2488ac27a0ecSDave Kleikamp } 2489ac27a0ecSDave Kleikamp 2490617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 2491617ba13bSMingming Cao struct ext4_super_block *es, 2492ac27a0ecSDave Kleikamp unsigned long journal_devnum) 2493ac27a0ecSDave Kleikamp { 2494ac27a0ecSDave Kleikamp journal_t *journal; 2495ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 2496ac27a0ecSDave Kleikamp dev_t journal_dev; 2497ac27a0ecSDave Kleikamp int err = 0; 2498ac27a0ecSDave Kleikamp int really_read_only; 2499ac27a0ecSDave Kleikamp 2500ac27a0ecSDave Kleikamp if (journal_devnum && 2501ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2502617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 2503ac27a0ecSDave Kleikamp "numbers have changed\n"); 2504ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 2505ac27a0ecSDave Kleikamp } else 2506ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 2507ac27a0ecSDave Kleikamp 2508ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 2509ac27a0ecSDave Kleikamp 2510ac27a0ecSDave Kleikamp /* 2511ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 2512ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 2513ac27a0ecSDave Kleikamp * can get read-write access to the device. 2514ac27a0ecSDave Kleikamp */ 2515ac27a0ecSDave Kleikamp 2516617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2517ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2518617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 2519ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 2520ac27a0ecSDave Kleikamp if (really_read_only) { 2521617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 2522ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 2523ac27a0ecSDave Kleikamp return -EROFS; 2524ac27a0ecSDave Kleikamp } 2525617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: write access will " 2526ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 2527ac27a0ecSDave Kleikamp } 2528ac27a0ecSDave Kleikamp } 2529ac27a0ecSDave Kleikamp 2530ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 2531617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 2532ac27a0ecSDave Kleikamp "and inode journals!\n"); 2533ac27a0ecSDave Kleikamp return -EINVAL; 2534ac27a0ecSDave Kleikamp } 2535ac27a0ecSDave Kleikamp 2536ac27a0ecSDave Kleikamp if (journal_inum) { 2537617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2538ac27a0ecSDave Kleikamp return -EINVAL; 2539ac27a0ecSDave Kleikamp } else { 2540617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 2541ac27a0ecSDave Kleikamp return -EINVAL; 2542ac27a0ecSDave Kleikamp } 2543ac27a0ecSDave Kleikamp 2544ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 2545dab291afSMingming Cao err = jbd2_journal_update_format(journal); 2546ac27a0ecSDave Kleikamp if (err) { 2547617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 2548dab291afSMingming Cao jbd2_journal_destroy(journal); 2549ac27a0ecSDave Kleikamp return err; 2550ac27a0ecSDave Kleikamp } 2551ac27a0ecSDave Kleikamp } 2552ac27a0ecSDave Kleikamp 2553617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 2554dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 2555ac27a0ecSDave Kleikamp if (!err) 2556dab291afSMingming Cao err = jbd2_journal_load(journal); 2557ac27a0ecSDave Kleikamp 2558ac27a0ecSDave Kleikamp if (err) { 2559617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 2560dab291afSMingming Cao jbd2_journal_destroy(journal); 2561ac27a0ecSDave Kleikamp return err; 2562ac27a0ecSDave Kleikamp } 2563ac27a0ecSDave Kleikamp 2564617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2565617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2566ac27a0ecSDave Kleikamp 2567ac27a0ecSDave Kleikamp if (journal_devnum && 2568ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2569ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 2570ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2571ac27a0ecSDave Kleikamp 2572ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2573617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2574ac27a0ecSDave Kleikamp } 2575ac27a0ecSDave Kleikamp 2576ac27a0ecSDave Kleikamp return 0; 2577ac27a0ecSDave Kleikamp } 2578ac27a0ecSDave Kleikamp 2579617ba13bSMingming Cao static int ext4_create_journal(struct super_block * sb, 2580617ba13bSMingming Cao struct ext4_super_block * es, 2581ac27a0ecSDave Kleikamp unsigned int journal_inum) 2582ac27a0ecSDave Kleikamp { 2583ac27a0ecSDave Kleikamp journal_t *journal; 25846c675bd4SBorislav Petkov int err; 2585ac27a0ecSDave Kleikamp 2586ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2587617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " 2588ac27a0ecSDave Kleikamp "create journal.\n"); 2589ac27a0ecSDave Kleikamp return -EROFS; 2590ac27a0ecSDave Kleikamp } 2591ac27a0ecSDave Kleikamp 25926c675bd4SBorislav Petkov journal = ext4_get_journal(sb, journal_inum); 25936c675bd4SBorislav Petkov if (!journal) 2594ac27a0ecSDave Kleikamp return -EINVAL; 2595ac27a0ecSDave Kleikamp 2596617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", 2597ac27a0ecSDave Kleikamp journal_inum); 2598ac27a0ecSDave Kleikamp 25996c675bd4SBorislav Petkov err = jbd2_journal_create(journal); 26006c675bd4SBorislav Petkov if (err) { 2601617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error creating journal.\n"); 2602dab291afSMingming Cao jbd2_journal_destroy(journal); 2603ac27a0ecSDave Kleikamp return -EIO; 2604ac27a0ecSDave Kleikamp } 2605ac27a0ecSDave Kleikamp 2606617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2607ac27a0ecSDave Kleikamp 2608617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 2609617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2610617ba13bSMingming Cao EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); 2611ac27a0ecSDave Kleikamp 2612ac27a0ecSDave Kleikamp es->s_journal_inum = cpu_to_le32(journal_inum); 2613ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2614ac27a0ecSDave Kleikamp 2615ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2616617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2617ac27a0ecSDave Kleikamp 2618ac27a0ecSDave Kleikamp return 0; 2619ac27a0ecSDave Kleikamp } 2620ac27a0ecSDave Kleikamp 2621617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 2622617ba13bSMingming Cao struct ext4_super_block * es, 2623ac27a0ecSDave Kleikamp int sync) 2624ac27a0ecSDave Kleikamp { 2625617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 2626ac27a0ecSDave Kleikamp 2627ac27a0ecSDave Kleikamp if (!sbh) 2628ac27a0ecSDave Kleikamp return; 2629ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 2630bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); 2631617ba13bSMingming Cao es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 2632ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 2633ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 2634ac27a0ecSDave Kleikamp if (sync) 2635ac27a0ecSDave Kleikamp sync_dirty_buffer(sbh); 2636ac27a0ecSDave Kleikamp } 2637ac27a0ecSDave Kleikamp 2638ac27a0ecSDave Kleikamp 2639ac27a0ecSDave Kleikamp /* 2640ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 2641ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 2642ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 2643ac27a0ecSDave Kleikamp */ 2644617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 2645617ba13bSMingming Cao struct ext4_super_block * es) 2646ac27a0ecSDave Kleikamp { 2647617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2648ac27a0ecSDave Kleikamp 2649dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2650dab291afSMingming Cao jbd2_journal_flush(journal); 265132c37730SJan Kara lock_super(sb); 2652617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 2653ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 2654617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2655ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2656617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2657ac27a0ecSDave Kleikamp } 265832c37730SJan Kara unlock_super(sb); 2659dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 2660ac27a0ecSDave Kleikamp } 2661ac27a0ecSDave Kleikamp 2662ac27a0ecSDave Kleikamp /* 2663ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 2664ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 2665ac27a0ecSDave Kleikamp * main filesystem now. 2666ac27a0ecSDave Kleikamp */ 2667617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 2668617ba13bSMingming Cao struct ext4_super_block * es) 2669ac27a0ecSDave Kleikamp { 2670ac27a0ecSDave Kleikamp journal_t *journal; 2671ac27a0ecSDave Kleikamp int j_errno; 2672ac27a0ecSDave Kleikamp const char *errstr; 2673ac27a0ecSDave Kleikamp 2674617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2675ac27a0ecSDave Kleikamp 2676ac27a0ecSDave Kleikamp /* 2677ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 2678617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 2679ac27a0ecSDave Kleikamp */ 2680ac27a0ecSDave Kleikamp 2681dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 2682ac27a0ecSDave Kleikamp if (j_errno) { 2683ac27a0ecSDave Kleikamp char nbuf[16]; 2684ac27a0ecSDave Kleikamp 2685617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 2686617ba13bSMingming Cao ext4_warning(sb, __FUNCTION__, "Filesystem error recorded " 2687ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 2688617ba13bSMingming Cao ext4_warning(sb, __FUNCTION__, "Marking fs in need of " 2689ac27a0ecSDave Kleikamp "filesystem check."); 2690ac27a0ecSDave Kleikamp 2691617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2692617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2693617ba13bSMingming Cao ext4_commit_super (sb, es, 1); 2694ac27a0ecSDave Kleikamp 2695dab291afSMingming Cao jbd2_journal_clear_err(journal); 2696ac27a0ecSDave Kleikamp } 2697ac27a0ecSDave Kleikamp } 2698ac27a0ecSDave Kleikamp 2699ac27a0ecSDave Kleikamp /* 2700ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 2701ac27a0ecSDave Kleikamp * and wait on the commit. 2702ac27a0ecSDave Kleikamp */ 2703617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 2704ac27a0ecSDave Kleikamp { 2705ac27a0ecSDave Kleikamp journal_t *journal; 2706ac27a0ecSDave Kleikamp int ret; 2707ac27a0ecSDave Kleikamp 2708ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 2709ac27a0ecSDave Kleikamp return 0; 2710ac27a0ecSDave Kleikamp 2711617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2712ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2713617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 2714ac27a0ecSDave Kleikamp return ret; 2715ac27a0ecSDave Kleikamp } 2716ac27a0ecSDave Kleikamp 2717ac27a0ecSDave Kleikamp /* 2718617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 2719ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 2720ac27a0ecSDave Kleikamp * point. Just start an async writeback to get the buffers on their way 2721ac27a0ecSDave Kleikamp * to the disk. 2722ac27a0ecSDave Kleikamp * 2723ac27a0ecSDave Kleikamp * This implicitly triggers the writebehind on sync(). 2724ac27a0ecSDave Kleikamp */ 2725ac27a0ecSDave Kleikamp 2726617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb) 2727ac27a0ecSDave Kleikamp { 2728ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 2729ac27a0ecSDave Kleikamp BUG(); 2730ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2731ac27a0ecSDave Kleikamp } 2732ac27a0ecSDave Kleikamp 2733617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 2734ac27a0ecSDave Kleikamp { 2735ac27a0ecSDave Kleikamp tid_t target; 2736ac27a0ecSDave Kleikamp 2737ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2738dab291afSMingming Cao if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { 2739ac27a0ecSDave Kleikamp if (wait) 2740dab291afSMingming Cao jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); 2741ac27a0ecSDave Kleikamp } 2742ac27a0ecSDave Kleikamp return 0; 2743ac27a0ecSDave Kleikamp } 2744ac27a0ecSDave Kleikamp 2745ac27a0ecSDave Kleikamp /* 2746ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 2747ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 2748ac27a0ecSDave Kleikamp */ 2749617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb) 2750ac27a0ecSDave Kleikamp { 2751ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2752ac27a0ecSDave Kleikamp 2753ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2754617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2755ac27a0ecSDave Kleikamp 2756ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 2757dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2758dab291afSMingming Cao jbd2_journal_flush(journal); 2759ac27a0ecSDave Kleikamp 2760ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 2761617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2762617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2763ac27a0ecSDave Kleikamp } 2764ac27a0ecSDave Kleikamp } 2765ac27a0ecSDave Kleikamp 2766ac27a0ecSDave Kleikamp /* 2767ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 2768ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 2769ac27a0ecSDave Kleikamp */ 2770617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb) 2771ac27a0ecSDave Kleikamp { 2772ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2773ac27a0ecSDave Kleikamp lock_super(sb); 2774ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 2775617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2776617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2777ac27a0ecSDave Kleikamp unlock_super(sb); 2778dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 2779ac27a0ecSDave Kleikamp } 2780ac27a0ecSDave Kleikamp } 2781ac27a0ecSDave Kleikamp 2782617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data) 2783ac27a0ecSDave Kleikamp { 2784617ba13bSMingming Cao struct ext4_super_block * es; 2785617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2786617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 2787ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 2788617ba13bSMingming Cao struct ext4_mount_options old_opts; 2789ac27a0ecSDave Kleikamp int err; 2790ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2791ac27a0ecSDave Kleikamp int i; 2792ac27a0ecSDave Kleikamp #endif 2793ac27a0ecSDave Kleikamp 2794ac27a0ecSDave Kleikamp /* Store the original options */ 2795ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 2796ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 2797ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 2798ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 2799ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 2800ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2801ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 2802ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2803ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 2804ac27a0ecSDave Kleikamp #endif 2805ac27a0ecSDave Kleikamp 2806ac27a0ecSDave Kleikamp /* 2807ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 2808ac27a0ecSDave Kleikamp */ 2809ac27a0ecSDave Kleikamp if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { 2810ac27a0ecSDave Kleikamp err = -EINVAL; 2811ac27a0ecSDave Kleikamp goto restore_opts; 2812ac27a0ecSDave Kleikamp } 2813ac27a0ecSDave Kleikamp 2814617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 2815617ba13bSMingming Cao ext4_abort(sb, __FUNCTION__, "Abort forced by user"); 2816ac27a0ecSDave Kleikamp 2817ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2818617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2819ac27a0ecSDave Kleikamp 2820ac27a0ecSDave Kleikamp es = sbi->s_es; 2821ac27a0ecSDave Kleikamp 2822617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 2823ac27a0ecSDave Kleikamp 2824ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 2825bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 2826617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 2827ac27a0ecSDave Kleikamp err = -EROFS; 2828ac27a0ecSDave Kleikamp goto restore_opts; 2829ac27a0ecSDave Kleikamp } 2830ac27a0ecSDave Kleikamp 2831ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 2832ac27a0ecSDave Kleikamp /* 2833ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 2834ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 2835ac27a0ecSDave Kleikamp */ 2836ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 2837ac27a0ecSDave Kleikamp 2838ac27a0ecSDave Kleikamp /* 2839ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 2840ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 2841ac27a0ecSDave Kleikamp * mark the partition as valid again. 2842ac27a0ecSDave Kleikamp */ 2843617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 2844617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 2845ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 2846ac27a0ecSDave Kleikamp 284732c37730SJan Kara /* 284832c37730SJan Kara * We have to unlock super so that we can wait for 284932c37730SJan Kara * transactions. 285032c37730SJan Kara */ 285132c37730SJan Kara unlock_super(sb); 2852617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 285332c37730SJan Kara lock_super(sb); 2854ac27a0ecSDave Kleikamp } else { 2855ac27a0ecSDave Kleikamp __le32 ret; 2856617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2857617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 2858617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2859ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 2860ac27a0ecSDave Kleikamp "optional features (%x).\n", 2861ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(ret)); 2862ac27a0ecSDave Kleikamp err = -EROFS; 2863ac27a0ecSDave Kleikamp goto restore_opts; 2864ac27a0ecSDave Kleikamp } 2865ead6596bSEric Sandeen 2866ead6596bSEric Sandeen /* 2867ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 2868ead6596bSEric Sandeen * around from a previously readonly bdev mount, 2869ead6596bSEric Sandeen * require a full umount/remount for now. 2870ead6596bSEric Sandeen */ 2871ead6596bSEric Sandeen if (es->s_last_orphan) { 2872ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2873ead6596bSEric Sandeen "remount RDWR because of unprocessed " 2874ead6596bSEric Sandeen "orphan inode list. Please " 2875ead6596bSEric Sandeen "umount/remount instead.\n", 2876ead6596bSEric Sandeen sb->s_id); 2877ead6596bSEric Sandeen err = -EINVAL; 2878ead6596bSEric Sandeen goto restore_opts; 2879ead6596bSEric Sandeen } 2880ead6596bSEric Sandeen 2881ac27a0ecSDave Kleikamp /* 2882ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 2883ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 2884ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 2885ac27a0ecSDave Kleikamp * the partition.) 2886ac27a0ecSDave Kleikamp */ 2887617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2888ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2889617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 2890ac27a0ecSDave Kleikamp goto restore_opts; 2891617ba13bSMingming Cao if (!ext4_setup_super (sb, es, 0)) 2892ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2893ac27a0ecSDave Kleikamp } 2894ac27a0ecSDave Kleikamp } 2895ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2896ac27a0ecSDave Kleikamp /* Release old quota file names */ 2897ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2898ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 2899ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 2900ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 2901ac27a0ecSDave Kleikamp #endif 2902ac27a0ecSDave Kleikamp return 0; 2903ac27a0ecSDave Kleikamp restore_opts: 2904ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 2905ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 2906ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 2907ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 2908ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 2909ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2910ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 2911ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2912ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 2913ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 2914ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2915ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 2916ac27a0ecSDave Kleikamp } 2917ac27a0ecSDave Kleikamp #endif 2918ac27a0ecSDave Kleikamp return err; 2919ac27a0ecSDave Kleikamp } 2920ac27a0ecSDave Kleikamp 2921617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) 2922ac27a0ecSDave Kleikamp { 2923ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 2924617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2925617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 2926960cc398SPekka Enberg u64 fsid; 2927ac27a0ecSDave Kleikamp 29285e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 29295e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 29306bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 2931fd2d4291SAvantika Mathur ext4_group_t ngroups = sbi->s_groups_count, i; 29325e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 2933ac27a0ecSDave Kleikamp smp_rmb(); 2934ac27a0ecSDave Kleikamp 2935ac27a0ecSDave Kleikamp /* 29365e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 29375e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 29385e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 2939ac27a0ecSDave Kleikamp */ 2940ac27a0ecSDave Kleikamp 2941ac27a0ecSDave Kleikamp /* 2942ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 2943ac27a0ecSDave Kleikamp * overhead 2944ac27a0ecSDave Kleikamp */ 2945ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 2946ac27a0ecSDave Kleikamp 2947ac27a0ecSDave Kleikamp /* 2948ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 2949ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 2950ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 2951ac27a0ecSDave Kleikamp */ 2952ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 2953617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 2954617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 2955ac27a0ecSDave Kleikamp cond_resched(); 2956ac27a0ecSDave Kleikamp } 2957ac27a0ecSDave Kleikamp 2958ac27a0ecSDave Kleikamp /* 2959ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 2960ac27a0ecSDave Kleikamp * bitmap, and an inode table. 2961ac27a0ecSDave Kleikamp */ 29625e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 29635e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 29645e70030dSBadari Pulavarty smp_wmb(); 29656bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 2966ac27a0ecSDave Kleikamp } 2967ac27a0ecSDave Kleikamp 2968617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 2969ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 29705e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 297152d9f3b4SPeter Zijlstra buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); 2972308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 2973bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 2974bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 2975ac27a0ecSDave Kleikamp buf->f_bavail = 0; 2976ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 297752d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 29785e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 2979617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 2980960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 2981960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 2982960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 2983960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 2984ac27a0ecSDave Kleikamp return 0; 2985ac27a0ecSDave Kleikamp } 2986ac27a0ecSDave Kleikamp 2987ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 2988ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 2989ac27a0ecSDave Kleikamp * Process 1 Process 2 2990617ba13bSMingming Cao * ext4_create() quota_sync() 2991dab291afSMingming Cao * jbd2_journal_start() write_dquot() 2992ac27a0ecSDave Kleikamp * DQUOT_INIT() down(dqio_mutex) 2993dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 2994ac27a0ecSDave Kleikamp * 2995ac27a0ecSDave Kleikamp */ 2996ac27a0ecSDave Kleikamp 2997ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2998ac27a0ecSDave Kleikamp 2999ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3000ac27a0ecSDave Kleikamp { 3001ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3002ac27a0ecSDave Kleikamp } 3003ac27a0ecSDave Kleikamp 3004617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type) 3005ac27a0ecSDave Kleikamp { 3006ac27a0ecSDave Kleikamp handle_t *handle; 3007ac27a0ecSDave Kleikamp int ret, err; 3008ac27a0ecSDave Kleikamp 3009ac27a0ecSDave Kleikamp /* We may create quota structure so we need to reserve enough blocks */ 3010617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); 3011ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3012ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3013ac27a0ecSDave Kleikamp ret = dquot_initialize(inode, type); 3014617ba13bSMingming Cao err = ext4_journal_stop(handle); 3015ac27a0ecSDave Kleikamp if (!ret) 3016ac27a0ecSDave Kleikamp ret = err; 3017ac27a0ecSDave Kleikamp return ret; 3018ac27a0ecSDave Kleikamp } 3019ac27a0ecSDave Kleikamp 3020617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode) 3021ac27a0ecSDave Kleikamp { 3022ac27a0ecSDave Kleikamp handle_t *handle; 3023ac27a0ecSDave Kleikamp int ret, err; 3024ac27a0ecSDave Kleikamp 3025ac27a0ecSDave Kleikamp /* We may delete quota structure so we need to reserve enough blocks */ 3026617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); 3027ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3028ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3029ac27a0ecSDave Kleikamp ret = dquot_drop(inode); 3030617ba13bSMingming Cao err = ext4_journal_stop(handle); 3031ac27a0ecSDave Kleikamp if (!ret) 3032ac27a0ecSDave Kleikamp ret = err; 3033ac27a0ecSDave Kleikamp return ret; 3034ac27a0ecSDave Kleikamp } 3035ac27a0ecSDave Kleikamp 3036617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3037ac27a0ecSDave Kleikamp { 3038ac27a0ecSDave Kleikamp int ret, err; 3039ac27a0ecSDave Kleikamp handle_t *handle; 3040ac27a0ecSDave Kleikamp struct inode *inode; 3041ac27a0ecSDave Kleikamp 3042ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3043617ba13bSMingming Cao handle = ext4_journal_start(inode, 3044617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3045ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3046ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3047ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3048617ba13bSMingming Cao err = ext4_journal_stop(handle); 3049ac27a0ecSDave Kleikamp if (!ret) 3050ac27a0ecSDave Kleikamp ret = err; 3051ac27a0ecSDave Kleikamp return ret; 3052ac27a0ecSDave Kleikamp } 3053ac27a0ecSDave Kleikamp 3054617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3055ac27a0ecSDave Kleikamp { 3056ac27a0ecSDave Kleikamp int ret, err; 3057ac27a0ecSDave Kleikamp handle_t *handle; 3058ac27a0ecSDave Kleikamp 3059617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3060617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3061ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3062ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3063ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3064617ba13bSMingming Cao err = ext4_journal_stop(handle); 3065ac27a0ecSDave Kleikamp if (!ret) 3066ac27a0ecSDave Kleikamp ret = err; 3067ac27a0ecSDave Kleikamp return ret; 3068ac27a0ecSDave Kleikamp } 3069ac27a0ecSDave Kleikamp 3070617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3071ac27a0ecSDave Kleikamp { 3072ac27a0ecSDave Kleikamp int ret, err; 3073ac27a0ecSDave Kleikamp handle_t *handle; 3074ac27a0ecSDave Kleikamp 3075617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3076617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 30779c3013e9SJan Kara if (IS_ERR(handle)) { 30789c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 30799c3013e9SJan Kara dquot_release(dquot); 3080ac27a0ecSDave Kleikamp return PTR_ERR(handle); 30819c3013e9SJan Kara } 3082ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3083617ba13bSMingming Cao err = ext4_journal_stop(handle); 3084ac27a0ecSDave Kleikamp if (!ret) 3085ac27a0ecSDave Kleikamp ret = err; 3086ac27a0ecSDave Kleikamp return ret; 3087ac27a0ecSDave Kleikamp } 3088ac27a0ecSDave Kleikamp 3089617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3090ac27a0ecSDave Kleikamp { 3091ac27a0ecSDave Kleikamp /* Are we journalling quotas? */ 3092617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3093617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3094ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3095617ba13bSMingming Cao return ext4_write_dquot(dquot); 3096ac27a0ecSDave Kleikamp } else { 3097ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3098ac27a0ecSDave Kleikamp } 3099ac27a0ecSDave Kleikamp } 3100ac27a0ecSDave Kleikamp 3101617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3102ac27a0ecSDave Kleikamp { 3103ac27a0ecSDave Kleikamp int ret, err; 3104ac27a0ecSDave Kleikamp handle_t *handle; 3105ac27a0ecSDave Kleikamp 3106ac27a0ecSDave Kleikamp /* Data block + inode block */ 3107617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3108ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3109ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3110ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3111617ba13bSMingming Cao err = ext4_journal_stop(handle); 3112ac27a0ecSDave Kleikamp if (!ret) 3113ac27a0ecSDave Kleikamp ret = err; 3114ac27a0ecSDave Kleikamp return ret; 3115ac27a0ecSDave Kleikamp } 3116ac27a0ecSDave Kleikamp 3117ac27a0ecSDave Kleikamp /* 3118ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3119ac27a0ecSDave Kleikamp * the quota file and such... 3120ac27a0ecSDave Kleikamp */ 3121617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3122ac27a0ecSDave Kleikamp { 3123617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3124617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3125ac27a0ecSDave Kleikamp } 3126ac27a0ecSDave Kleikamp 3127ac27a0ecSDave Kleikamp /* 3128ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3129ac27a0ecSDave Kleikamp */ 3130617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 3131ac27a0ecSDave Kleikamp char *path) 3132ac27a0ecSDave Kleikamp { 3133ac27a0ecSDave Kleikamp int err; 3134ac27a0ecSDave Kleikamp struct nameidata nd; 3135ac27a0ecSDave Kleikamp 3136ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3137ac27a0ecSDave Kleikamp return -EINVAL; 3138ac27a0ecSDave Kleikamp /* Not journalling quota? */ 3139617ba13bSMingming Cao if (!EXT4_SB(sb)->s_qf_names[USRQUOTA] && 3140617ba13bSMingming Cao !EXT4_SB(sb)->s_qf_names[GRPQUOTA]) 3141ac27a0ecSDave Kleikamp return vfs_quota_on(sb, type, format_id, path); 3142ac27a0ecSDave Kleikamp err = path_lookup(path, LOOKUP_FOLLOW, &nd); 3143ac27a0ecSDave Kleikamp if (err) 3144ac27a0ecSDave Kleikamp return err; 3145ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 3146ac27a0ecSDave Kleikamp if (nd.mnt->mnt_sb != sb) { 3147ac27a0ecSDave Kleikamp path_release(&nd); 3148ac27a0ecSDave Kleikamp return -EXDEV; 3149ac27a0ecSDave Kleikamp } 3150ac27a0ecSDave Kleikamp /* Quotafile not of fs root? */ 3151ac27a0ecSDave Kleikamp if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) 3152ac27a0ecSDave Kleikamp printk(KERN_WARNING 3153617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 3154ac27a0ecSDave Kleikamp "Journalled quota will not work.\n"); 3155ac27a0ecSDave Kleikamp path_release(&nd); 3156ac27a0ecSDave Kleikamp return vfs_quota_on(sb, type, format_id, path); 3157ac27a0ecSDave Kleikamp } 3158ac27a0ecSDave Kleikamp 3159ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3160ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3161ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3162ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3163617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3164ac27a0ecSDave Kleikamp size_t len, loff_t off) 3165ac27a0ecSDave Kleikamp { 3166ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3167725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3168ac27a0ecSDave Kleikamp int err = 0; 3169ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3170ac27a0ecSDave Kleikamp int tocopy; 3171ac27a0ecSDave Kleikamp size_t toread; 3172ac27a0ecSDave Kleikamp struct buffer_head *bh; 3173ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3174ac27a0ecSDave Kleikamp 3175ac27a0ecSDave Kleikamp if (off > i_size) 3176ac27a0ecSDave Kleikamp return 0; 3177ac27a0ecSDave Kleikamp if (off+len > i_size) 3178ac27a0ecSDave Kleikamp len = i_size-off; 3179ac27a0ecSDave Kleikamp toread = len; 3180ac27a0ecSDave Kleikamp while (toread > 0) { 3181ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3182ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3183617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3184ac27a0ecSDave Kleikamp if (err) 3185ac27a0ecSDave Kleikamp return err; 3186ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3187ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3188ac27a0ecSDave Kleikamp else 3189ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3190ac27a0ecSDave Kleikamp brelse(bh); 3191ac27a0ecSDave Kleikamp offset = 0; 3192ac27a0ecSDave Kleikamp toread -= tocopy; 3193ac27a0ecSDave Kleikamp data += tocopy; 3194ac27a0ecSDave Kleikamp blk++; 3195ac27a0ecSDave Kleikamp } 3196ac27a0ecSDave Kleikamp return len; 3197ac27a0ecSDave Kleikamp } 3198ac27a0ecSDave Kleikamp 3199ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3200ac27a0ecSDave Kleikamp * enough credits) */ 3201617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3202ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3203ac27a0ecSDave Kleikamp { 3204ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3205725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3206ac27a0ecSDave Kleikamp int err = 0; 3207ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3208ac27a0ecSDave Kleikamp int tocopy; 3209617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3210ac27a0ecSDave Kleikamp size_t towrite = len; 3211ac27a0ecSDave Kleikamp struct buffer_head *bh; 3212ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3213ac27a0ecSDave Kleikamp 32149c3013e9SJan Kara if (!handle) { 32159c3013e9SJan Kara printk(KERN_WARNING "EXT4-fs: Quota write (off=%Lu, len=%Lu)" 32169c3013e9SJan Kara " cancelled because transaction is not started.\n", 32179c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 32189c3013e9SJan Kara return -EIO; 32199c3013e9SJan Kara } 3220ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3221ac27a0ecSDave Kleikamp while (towrite > 0) { 3222ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3223ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3224617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3225ac27a0ecSDave Kleikamp if (!bh) 3226ac27a0ecSDave Kleikamp goto out; 3227ac27a0ecSDave Kleikamp if (journal_quota) { 3228617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3229ac27a0ecSDave Kleikamp if (err) { 3230ac27a0ecSDave Kleikamp brelse(bh); 3231ac27a0ecSDave Kleikamp goto out; 3232ac27a0ecSDave Kleikamp } 3233ac27a0ecSDave Kleikamp } 3234ac27a0ecSDave Kleikamp lock_buffer(bh); 3235ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3236ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3237ac27a0ecSDave Kleikamp unlock_buffer(bh); 3238ac27a0ecSDave Kleikamp if (journal_quota) 3239617ba13bSMingming Cao err = ext4_journal_dirty_metadata(handle, bh); 3240ac27a0ecSDave Kleikamp else { 3241ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3242617ba13bSMingming Cao err = ext4_journal_dirty_data(handle, bh); 3243ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3244ac27a0ecSDave Kleikamp } 3245ac27a0ecSDave Kleikamp brelse(bh); 3246ac27a0ecSDave Kleikamp if (err) 3247ac27a0ecSDave Kleikamp goto out; 3248ac27a0ecSDave Kleikamp offset = 0; 3249ac27a0ecSDave Kleikamp towrite -= tocopy; 3250ac27a0ecSDave Kleikamp data += tocopy; 3251ac27a0ecSDave Kleikamp blk++; 3252ac27a0ecSDave Kleikamp } 3253ac27a0ecSDave Kleikamp out: 3254ac27a0ecSDave Kleikamp if (len == towrite) 3255ac27a0ecSDave Kleikamp return err; 3256ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3257ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3258617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3259ac27a0ecSDave Kleikamp } 3260ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3261617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3262ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3263ac27a0ecSDave Kleikamp return len - towrite; 3264ac27a0ecSDave Kleikamp } 3265ac27a0ecSDave Kleikamp 3266ac27a0ecSDave Kleikamp #endif 3267ac27a0ecSDave Kleikamp 3268617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 3269ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 3270ac27a0ecSDave Kleikamp { 3271617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3272ac27a0ecSDave Kleikamp } 3273ac27a0ecSDave Kleikamp 3274617ba13bSMingming Cao static struct file_system_type ext4dev_fs_type = { 3275ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 3276617ba13bSMingming Cao .name = "ext4dev", 3277617ba13bSMingming Cao .get_sb = ext4_get_sb, 3278ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3279ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3280ac27a0ecSDave Kleikamp }; 3281ac27a0ecSDave Kleikamp 3282617ba13bSMingming Cao static int __init init_ext4_fs(void) 3283ac27a0ecSDave Kleikamp { 3284c9de560dSAlex Tomas int err; 3285c9de560dSAlex Tomas 3286c9de560dSAlex Tomas err = init_ext4_mballoc(); 3287ac27a0ecSDave Kleikamp if (err) 3288ac27a0ecSDave Kleikamp return err; 3289c9de560dSAlex Tomas 3290c9de560dSAlex Tomas err = init_ext4_xattr(); 3291c9de560dSAlex Tomas if (err) 3292c9de560dSAlex Tomas goto out2; 3293ac27a0ecSDave Kleikamp err = init_inodecache(); 3294ac27a0ecSDave Kleikamp if (err) 3295ac27a0ecSDave Kleikamp goto out1; 3296617ba13bSMingming Cao err = register_filesystem(&ext4dev_fs_type); 3297ac27a0ecSDave Kleikamp if (err) 3298ac27a0ecSDave Kleikamp goto out; 3299ac27a0ecSDave Kleikamp return 0; 3300ac27a0ecSDave Kleikamp out: 3301ac27a0ecSDave Kleikamp destroy_inodecache(); 3302ac27a0ecSDave Kleikamp out1: 3303617ba13bSMingming Cao exit_ext4_xattr(); 3304c9de560dSAlex Tomas out2: 3305c9de560dSAlex Tomas exit_ext4_mballoc(); 3306ac27a0ecSDave Kleikamp return err; 3307ac27a0ecSDave Kleikamp } 3308ac27a0ecSDave Kleikamp 3309617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 3310ac27a0ecSDave Kleikamp { 3311617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 3312ac27a0ecSDave Kleikamp destroy_inodecache(); 3313617ba13bSMingming Cao exit_ext4_xattr(); 3314c9de560dSAlex Tomas exit_ext4_mballoc(); 3315ac27a0ecSDave Kleikamp } 3316ac27a0ecSDave Kleikamp 3317ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 3318617ba13bSMingming Cao MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); 3319ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 3320617ba13bSMingming Cao module_init(init_ext4_fs) 3321617ba13bSMingming Cao module_exit(exit_ext4_fs) 3322