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> 40ac27a0ecSDave Kleikamp 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 43ac27a0ecSDave Kleikamp #include "xattr.h" 44ac27a0ecSDave Kleikamp #include "acl.h" 45ac27a0ecSDave Kleikamp #include "namei.h" 46ac27a0ecSDave Kleikamp 47617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 48ac27a0ecSDave Kleikamp unsigned long journal_devnum); 49617ba13bSMingming Cao static int ext4_create_journal(struct super_block *, struct ext4_super_block *, 50ac27a0ecSDave Kleikamp unsigned int); 51617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 52617ba13bSMingming Cao struct ext4_super_block * es, 53ac27a0ecSDave Kleikamp int sync); 54617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 55617ba13bSMingming Cao struct ext4_super_block * es); 56617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 57617ba13bSMingming Cao struct ext4_super_block * es); 58617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 59617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 60ac27a0ecSDave Kleikamp char nbuf[16]); 61617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data); 62617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf); 63617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb); 64617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb); 65617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb); 66ac27a0ecSDave Kleikamp 67bd81d8eeSLaurent Vivier 688fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 698fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 70bd81d8eeSLaurent Vivier { 71bd81d8eeSLaurent Vivier return le32_to_cpu(bg->bg_block_bitmap) | 728fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 738fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 74bd81d8eeSLaurent Vivier } 75bd81d8eeSLaurent Vivier 768fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 778fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 78bd81d8eeSLaurent Vivier { 79bd81d8eeSLaurent Vivier return le32_to_cpu(bg->bg_inode_bitmap) | 808fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 818fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 82bd81d8eeSLaurent Vivier } 83bd81d8eeSLaurent Vivier 848fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 858fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 86bd81d8eeSLaurent Vivier { 87bd81d8eeSLaurent Vivier return le32_to_cpu(bg->bg_inode_table) | 888fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 898fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 90bd81d8eeSLaurent Vivier } 91bd81d8eeSLaurent Vivier 928fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 938fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 94bd81d8eeSLaurent Vivier { 95bd81d8eeSLaurent Vivier bg->bg_block_bitmap = cpu_to_le32((u32)blk); 968fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 978fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 98bd81d8eeSLaurent Vivier } 99bd81d8eeSLaurent Vivier 1008fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1018fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 102bd81d8eeSLaurent Vivier { 103bd81d8eeSLaurent Vivier bg->bg_inode_bitmap = cpu_to_le32((u32)blk); 1048fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1058fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 106bd81d8eeSLaurent Vivier } 107bd81d8eeSLaurent Vivier 1088fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1098fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 110bd81d8eeSLaurent Vivier { 111bd81d8eeSLaurent Vivier bg->bg_inode_table = cpu_to_le32((u32)blk); 1128fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1138fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 114bd81d8eeSLaurent Vivier } 115bd81d8eeSLaurent Vivier 116ac27a0ecSDave Kleikamp /* 117dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 118ac27a0ecSDave Kleikamp * 119ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 120ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 121ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 122ac27a0ecSDave Kleikamp * appropriate. 123ac27a0ecSDave Kleikamp */ 124617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 125ac27a0ecSDave Kleikamp { 126ac27a0ecSDave Kleikamp journal_t *journal; 127ac27a0ecSDave Kleikamp 128ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 129ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 130ac27a0ecSDave Kleikamp 131ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 132ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 133ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 134617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 135ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 136617ba13bSMingming Cao ext4_abort(sb, __FUNCTION__, 137ac27a0ecSDave Kleikamp "Detected aborted journal"); 138ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 139ac27a0ecSDave Kleikamp } 140ac27a0ecSDave Kleikamp 141dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 142ac27a0ecSDave Kleikamp } 143ac27a0ecSDave Kleikamp 144ac27a0ecSDave Kleikamp /* 145ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 146dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 147ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 148ac27a0ecSDave Kleikamp * appropriate. 149ac27a0ecSDave Kleikamp */ 150617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 151ac27a0ecSDave Kleikamp { 152ac27a0ecSDave Kleikamp struct super_block *sb; 153ac27a0ecSDave Kleikamp int err; 154ac27a0ecSDave Kleikamp int rc; 155ac27a0ecSDave Kleikamp 156ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 157ac27a0ecSDave Kleikamp err = handle->h_err; 158dab291afSMingming Cao rc = jbd2_journal_stop(handle); 159ac27a0ecSDave Kleikamp 160ac27a0ecSDave Kleikamp if (!err) 161ac27a0ecSDave Kleikamp err = rc; 162ac27a0ecSDave Kleikamp if (err) 163617ba13bSMingming Cao __ext4_std_error(sb, where, err); 164ac27a0ecSDave Kleikamp return err; 165ac27a0ecSDave Kleikamp } 166ac27a0ecSDave Kleikamp 167617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 168ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 169ac27a0ecSDave Kleikamp { 170ac27a0ecSDave Kleikamp char nbuf[16]; 171617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 172ac27a0ecSDave Kleikamp 173ac27a0ecSDave Kleikamp if (bh) 174ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 175ac27a0ecSDave Kleikamp 176ac27a0ecSDave Kleikamp if (!handle->h_err) 177ac27a0ecSDave Kleikamp handle->h_err = err; 178ac27a0ecSDave Kleikamp 179ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 180ac27a0ecSDave Kleikamp return; 181ac27a0ecSDave Kleikamp 182ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 183ac27a0ecSDave Kleikamp caller, errstr, err_fn); 184ac27a0ecSDave Kleikamp 185dab291afSMingming Cao jbd2_journal_abort_handle(handle); 186ac27a0ecSDave Kleikamp } 187ac27a0ecSDave Kleikamp 188ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 189ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 190ac27a0ecSDave Kleikamp * 191ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 192617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 193ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 194ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 195ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 196ac27a0ecSDave Kleikamp * write out the superblock safely. 197ac27a0ecSDave Kleikamp * 198dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 199ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 200ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 201ac27a0ecSDave Kleikamp */ 202ac27a0ecSDave Kleikamp 203617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 204ac27a0ecSDave Kleikamp { 205617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 206ac27a0ecSDave Kleikamp 207617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 208617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 209ac27a0ecSDave Kleikamp 210ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 211ac27a0ecSDave Kleikamp return; 212ac27a0ecSDave Kleikamp 213ac27a0ecSDave Kleikamp if (!test_opt (sb, ERRORS_CONT)) { 214617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 215ac27a0ecSDave Kleikamp 216617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 217ac27a0ecSDave Kleikamp if (journal) 218dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 219ac27a0ecSDave Kleikamp } 220ac27a0ecSDave Kleikamp if (test_opt (sb, ERRORS_RO)) { 221ac27a0ecSDave Kleikamp printk (KERN_CRIT "Remounting filesystem read-only\n"); 222ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 223ac27a0ecSDave Kleikamp } 224617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 225ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 226617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 227ac27a0ecSDave Kleikamp sb->s_id); 228ac27a0ecSDave Kleikamp } 229ac27a0ecSDave Kleikamp 230617ba13bSMingming Cao void ext4_error (struct super_block * sb, const char * function, 231ac27a0ecSDave Kleikamp const char * fmt, ...) 232ac27a0ecSDave Kleikamp { 233ac27a0ecSDave Kleikamp va_list args; 234ac27a0ecSDave Kleikamp 235ac27a0ecSDave Kleikamp va_start(args, fmt); 236617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 237ac27a0ecSDave Kleikamp vprintk(fmt, args); 238ac27a0ecSDave Kleikamp printk("\n"); 239ac27a0ecSDave Kleikamp va_end(args); 240ac27a0ecSDave Kleikamp 241617ba13bSMingming Cao ext4_handle_error(sb); 242ac27a0ecSDave Kleikamp } 243ac27a0ecSDave Kleikamp 244617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 245ac27a0ecSDave Kleikamp char nbuf[16]) 246ac27a0ecSDave Kleikamp { 247ac27a0ecSDave Kleikamp char *errstr = NULL; 248ac27a0ecSDave Kleikamp 249ac27a0ecSDave Kleikamp switch (errno) { 250ac27a0ecSDave Kleikamp case -EIO: 251ac27a0ecSDave Kleikamp errstr = "IO failure"; 252ac27a0ecSDave Kleikamp break; 253ac27a0ecSDave Kleikamp case -ENOMEM: 254ac27a0ecSDave Kleikamp errstr = "Out of memory"; 255ac27a0ecSDave Kleikamp break; 256ac27a0ecSDave Kleikamp case -EROFS: 257dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 258ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 259ac27a0ecSDave Kleikamp else 260ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 261ac27a0ecSDave Kleikamp break; 262ac27a0ecSDave Kleikamp default: 263ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 264ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 265ac27a0ecSDave Kleikamp * NULL. */ 266ac27a0ecSDave Kleikamp if (nbuf) { 267ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 268ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 269ac27a0ecSDave Kleikamp errstr = nbuf; 270ac27a0ecSDave Kleikamp } 271ac27a0ecSDave Kleikamp break; 272ac27a0ecSDave Kleikamp } 273ac27a0ecSDave Kleikamp 274ac27a0ecSDave Kleikamp return errstr; 275ac27a0ecSDave Kleikamp } 276ac27a0ecSDave Kleikamp 277617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 278ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 279ac27a0ecSDave Kleikamp 280617ba13bSMingming Cao void __ext4_std_error (struct super_block * sb, const char * function, 281ac27a0ecSDave Kleikamp int errno) 282ac27a0ecSDave Kleikamp { 283ac27a0ecSDave Kleikamp char nbuf[16]; 284ac27a0ecSDave Kleikamp const char *errstr; 285ac27a0ecSDave Kleikamp 286ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 287ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 288ac27a0ecSDave Kleikamp * an error. */ 289ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 290ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 291ac27a0ecSDave Kleikamp return; 292ac27a0ecSDave Kleikamp 293617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 294617ba13bSMingming Cao printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 295ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 296ac27a0ecSDave Kleikamp 297617ba13bSMingming Cao ext4_handle_error(sb); 298ac27a0ecSDave Kleikamp } 299ac27a0ecSDave Kleikamp 300ac27a0ecSDave Kleikamp /* 301617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 302ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 303ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 304ac27a0ecSDave Kleikamp * 305ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 306ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 307ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 308ac27a0ecSDave Kleikamp */ 309ac27a0ecSDave Kleikamp 310617ba13bSMingming Cao void ext4_abort (struct super_block * sb, const char * function, 311ac27a0ecSDave Kleikamp const char * fmt, ...) 312ac27a0ecSDave Kleikamp { 313ac27a0ecSDave Kleikamp va_list args; 314ac27a0ecSDave Kleikamp 315617ba13bSMingming Cao printk (KERN_CRIT "ext4_abort called.\n"); 316ac27a0ecSDave Kleikamp 317ac27a0ecSDave Kleikamp va_start(args, fmt); 318617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 319ac27a0ecSDave Kleikamp vprintk(fmt, args); 320ac27a0ecSDave Kleikamp printk("\n"); 321ac27a0ecSDave Kleikamp va_end(args); 322ac27a0ecSDave Kleikamp 323ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 324617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 325ac27a0ecSDave Kleikamp 326ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 327ac27a0ecSDave Kleikamp return; 328ac27a0ecSDave Kleikamp 329ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 330617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 331ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 332617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 333dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 334ac27a0ecSDave Kleikamp } 335ac27a0ecSDave Kleikamp 336617ba13bSMingming Cao void ext4_warning (struct super_block * sb, const char * function, 337ac27a0ecSDave Kleikamp const char * fmt, ...) 338ac27a0ecSDave Kleikamp { 339ac27a0ecSDave Kleikamp va_list args; 340ac27a0ecSDave Kleikamp 341ac27a0ecSDave Kleikamp va_start(args, fmt); 342617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 343ac27a0ecSDave Kleikamp sb->s_id, function); 344ac27a0ecSDave Kleikamp vprintk(fmt, args); 345ac27a0ecSDave Kleikamp printk("\n"); 346ac27a0ecSDave Kleikamp va_end(args); 347ac27a0ecSDave Kleikamp } 348ac27a0ecSDave Kleikamp 349617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 350ac27a0ecSDave Kleikamp { 351617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 352ac27a0ecSDave Kleikamp 353617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 354ac27a0ecSDave Kleikamp return; 355ac27a0ecSDave Kleikamp 356617ba13bSMingming Cao ext4_warning(sb, __FUNCTION__, 357ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 358ac27a0ecSDave Kleikamp "running e2fsck is recommended", 359617ba13bSMingming Cao EXT4_DYNAMIC_REV); 360ac27a0ecSDave Kleikamp 361617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 362617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 363617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 364ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 365ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 366ac27a0ecSDave Kleikamp 367ac27a0ecSDave Kleikamp /* 368ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 369ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 370ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 371ac27a0ecSDave Kleikamp */ 372ac27a0ecSDave Kleikamp } 373ac27a0ecSDave Kleikamp 374ac27a0ecSDave Kleikamp /* 375ac27a0ecSDave Kleikamp * Open the external journal device 376ac27a0ecSDave Kleikamp */ 377617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 378ac27a0ecSDave Kleikamp { 379ac27a0ecSDave Kleikamp struct block_device *bdev; 380ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 381ac27a0ecSDave Kleikamp 382ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 383ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 384ac27a0ecSDave Kleikamp goto fail; 385ac27a0ecSDave Kleikamp return bdev; 386ac27a0ecSDave Kleikamp 387ac27a0ecSDave Kleikamp fail: 388617ba13bSMingming Cao printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", 389ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 390ac27a0ecSDave Kleikamp return NULL; 391ac27a0ecSDave Kleikamp } 392ac27a0ecSDave Kleikamp 393ac27a0ecSDave Kleikamp /* 394ac27a0ecSDave Kleikamp * Release the journal device 395ac27a0ecSDave Kleikamp */ 396617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 397ac27a0ecSDave Kleikamp { 398ac27a0ecSDave Kleikamp bd_release(bdev); 399ac27a0ecSDave Kleikamp return blkdev_put(bdev); 400ac27a0ecSDave Kleikamp } 401ac27a0ecSDave Kleikamp 402617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 403ac27a0ecSDave Kleikamp { 404ac27a0ecSDave Kleikamp struct block_device *bdev; 405ac27a0ecSDave Kleikamp int ret = -ENODEV; 406ac27a0ecSDave Kleikamp 407ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 408ac27a0ecSDave Kleikamp if (bdev) { 409617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 410ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 411ac27a0ecSDave Kleikamp } 412ac27a0ecSDave Kleikamp return ret; 413ac27a0ecSDave Kleikamp } 414ac27a0ecSDave Kleikamp 415ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 416ac27a0ecSDave Kleikamp { 417617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 418ac27a0ecSDave Kleikamp } 419ac27a0ecSDave Kleikamp 420617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 421ac27a0ecSDave Kleikamp { 422ac27a0ecSDave Kleikamp struct list_head *l; 423ac27a0ecSDave Kleikamp 424ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 425ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 426ac27a0ecSDave Kleikamp 427ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 428ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 429ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 430ac27a0ecSDave Kleikamp printk(KERN_ERR " " 431ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 432ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 433ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 434ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 435ac27a0ecSDave Kleikamp } 436ac27a0ecSDave Kleikamp } 437ac27a0ecSDave Kleikamp 438617ba13bSMingming Cao static void ext4_put_super (struct super_block * sb) 439ac27a0ecSDave Kleikamp { 440617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 441617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 442ac27a0ecSDave Kleikamp int i; 443ac27a0ecSDave Kleikamp 444a86c6181SAlex Tomas ext4_ext_release(sb); 445617ba13bSMingming Cao ext4_xattr_put_super(sb); 446dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 447ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 448617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 449ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 450ac27a0ecSDave Kleikamp BUFFER_TRACE(sbi->s_sbh, "marking dirty"); 451ac27a0ecSDave Kleikamp mark_buffer_dirty(sbi->s_sbh); 452617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 453ac27a0ecSDave Kleikamp } 454ac27a0ecSDave Kleikamp 455ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 456ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 457ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 458ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 459ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 460ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 461ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 462ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 463ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 464ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 465ac27a0ecSDave Kleikamp #endif 466ac27a0ecSDave Kleikamp 467ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 468ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 469ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 470ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 471ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 472ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 473ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 474ac27a0ecSDave Kleikamp 475f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 476ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 477ac27a0ecSDave Kleikamp /* 478ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 479ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 480ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 481ac27a0ecSDave Kleikamp */ 482ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 483f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 484617ba13bSMingming Cao ext4_blkdev_remove(sbi); 485ac27a0ecSDave Kleikamp } 486ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 487ac27a0ecSDave Kleikamp kfree(sbi); 488ac27a0ecSDave Kleikamp return; 489ac27a0ecSDave Kleikamp } 490ac27a0ecSDave Kleikamp 491e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 492ac27a0ecSDave Kleikamp 493ac27a0ecSDave Kleikamp /* 494ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 495ac27a0ecSDave Kleikamp */ 496617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 497ac27a0ecSDave Kleikamp { 498617ba13bSMingming Cao struct ext4_inode_info *ei; 499ac27a0ecSDave Kleikamp 500e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 501ac27a0ecSDave Kleikamp if (!ei) 502ac27a0ecSDave Kleikamp return NULL; 503617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 504617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 505617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 506ac27a0ecSDave Kleikamp #endif 507ac27a0ecSDave Kleikamp ei->i_block_alloc_info = NULL; 508ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 509a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 510ac27a0ecSDave Kleikamp return &ei->vfs_inode; 511ac27a0ecSDave Kleikamp } 512ac27a0ecSDave Kleikamp 513617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 514ac27a0ecSDave Kleikamp { 5159f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 5169f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 5179f7dd93dSVasily Averin EXT4_I(inode)); 5189f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 5199f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 5209f7dd93dSVasily Averin true); 5219f7dd93dSVasily Averin dump_stack(); 5229f7dd93dSVasily Averin } 523617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 524ac27a0ecSDave Kleikamp } 525ac27a0ecSDave Kleikamp 5264ba9b9d0SChristoph Lameter static void init_once(struct kmem_cache *cachep, void *foo) 527ac27a0ecSDave Kleikamp { 528617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 529ac27a0ecSDave Kleikamp 530ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 531617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 532ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 533ac27a0ecSDave Kleikamp #endif 534ac27a0ecSDave Kleikamp mutex_init(&ei->truncate_mutex); 535ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 536ac27a0ecSDave Kleikamp } 537ac27a0ecSDave Kleikamp 538ac27a0ecSDave Kleikamp static int init_inodecache(void) 539ac27a0ecSDave Kleikamp { 540617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 541617ba13bSMingming Cao sizeof(struct ext4_inode_info), 542ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 543ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 54420c2df83SPaul Mundt init_once); 545617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 546ac27a0ecSDave Kleikamp return -ENOMEM; 547ac27a0ecSDave Kleikamp return 0; 548ac27a0ecSDave Kleikamp } 549ac27a0ecSDave Kleikamp 550ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 551ac27a0ecSDave Kleikamp { 552617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 553ac27a0ecSDave Kleikamp } 554ac27a0ecSDave Kleikamp 555617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 556ac27a0ecSDave Kleikamp { 557617ba13bSMingming Cao struct ext4_block_alloc_info *rsv = EXT4_I(inode)->i_block_alloc_info; 558617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 559617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 560617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 561617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 562617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 563ac27a0ecSDave Kleikamp } 564617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 565617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 566617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 567617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 568ac27a0ecSDave Kleikamp } 569ac27a0ecSDave Kleikamp #endif 570617ba13bSMingming Cao ext4_discard_reservation(inode); 571617ba13bSMingming Cao EXT4_I(inode)->i_block_alloc_info = NULL; 572ac27a0ecSDave Kleikamp if (unlikely(rsv)) 573ac27a0ecSDave Kleikamp kfree(rsv); 574ac27a0ecSDave Kleikamp } 575ac27a0ecSDave Kleikamp 576617ba13bSMingming Cao static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb) 577ac27a0ecSDave Kleikamp { 578ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 579617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 580ac27a0ecSDave Kleikamp 581ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 582ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 583ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); 584ac27a0ecSDave Kleikamp 585ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 586ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 587ac27a0ecSDave Kleikamp 588ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 589ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 590ac27a0ecSDave Kleikamp 591617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 592ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 593ac27a0ecSDave Kleikamp 594617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 595ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 596ac27a0ecSDave Kleikamp #endif 597ac27a0ecSDave Kleikamp } 598ac27a0ecSDave Kleikamp 599617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 600ac27a0ecSDave Kleikamp { 601ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 602ac27a0ecSDave Kleikamp 603617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 604ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 605617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 606ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 607617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 608ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 609ac27a0ecSDave Kleikamp 610617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 611ac27a0ecSDave Kleikamp 612ac27a0ecSDave Kleikamp return 0; 613ac27a0ecSDave Kleikamp } 614ac27a0ecSDave Kleikamp 615ac27a0ecSDave Kleikamp 616617ba13bSMingming Cao static struct dentry *ext4_get_dentry(struct super_block *sb, void *vobjp) 617ac27a0ecSDave Kleikamp { 618ac27a0ecSDave Kleikamp __u32 *objp = vobjp; 619ac27a0ecSDave Kleikamp unsigned long ino = objp[0]; 620ac27a0ecSDave Kleikamp __u32 generation = objp[1]; 621ac27a0ecSDave Kleikamp struct inode *inode; 622ac27a0ecSDave Kleikamp struct dentry *result; 623ac27a0ecSDave Kleikamp 624617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 625ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 626617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 627ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 628ac27a0ecSDave Kleikamp 629ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 630ac27a0ecSDave Kleikamp * 631617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 632ac27a0ecSDave Kleikamp * deleted, so we should be safe. 633ac27a0ecSDave Kleikamp * 634ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 635ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 636ac27a0ecSDave Kleikamp */ 637ac27a0ecSDave Kleikamp inode = iget(sb, ino); 638ac27a0ecSDave Kleikamp if (inode == NULL) 639ac27a0ecSDave Kleikamp return ERR_PTR(-ENOMEM); 640ac27a0ecSDave Kleikamp if (is_bad_inode(inode) || 641ac27a0ecSDave Kleikamp (generation && inode->i_generation != generation)) { 642ac27a0ecSDave Kleikamp iput(inode); 643ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 644ac27a0ecSDave Kleikamp } 645ac27a0ecSDave Kleikamp /* now to find a dentry. 646ac27a0ecSDave Kleikamp * If possible, get a well-connected one 647ac27a0ecSDave Kleikamp */ 648ac27a0ecSDave Kleikamp result = d_alloc_anon(inode); 649ac27a0ecSDave Kleikamp if (!result) { 650ac27a0ecSDave Kleikamp iput(inode); 651ac27a0ecSDave Kleikamp return ERR_PTR(-ENOMEM); 652ac27a0ecSDave Kleikamp } 653ac27a0ecSDave Kleikamp return result; 654ac27a0ecSDave Kleikamp } 655ac27a0ecSDave Kleikamp 656ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 657ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 658ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 659ac27a0ecSDave Kleikamp 660617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type); 661617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode); 662617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 663617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 664617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 665617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 666617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 667617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, char *path); 668617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 669617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 670ac27a0ecSDave Kleikamp size_t len, loff_t off); 671617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 672ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 673ac27a0ecSDave Kleikamp 674617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 675617ba13bSMingming Cao .initialize = ext4_dquot_initialize, 676617ba13bSMingming Cao .drop = ext4_dquot_drop, 677ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 678ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 679ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 680ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 681ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 682617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 683617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 684617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 685617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 686617ba13bSMingming Cao .write_info = ext4_write_info 687ac27a0ecSDave Kleikamp }; 688ac27a0ecSDave Kleikamp 689617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 690617ba13bSMingming Cao .quota_on = ext4_quota_on, 691ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 692ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 693ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 694ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 695ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 696ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 697ac27a0ecSDave Kleikamp }; 698ac27a0ecSDave Kleikamp #endif 699ac27a0ecSDave Kleikamp 700ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 701617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 702617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 703617ba13bSMingming Cao .read_inode = ext4_read_inode, 704617ba13bSMingming Cao .write_inode = ext4_write_inode, 705617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 706617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 707617ba13bSMingming Cao .put_super = ext4_put_super, 708617ba13bSMingming Cao .write_super = ext4_write_super, 709617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 710617ba13bSMingming Cao .write_super_lockfs = ext4_write_super_lockfs, 711617ba13bSMingming Cao .unlockfs = ext4_unlockfs, 712617ba13bSMingming Cao .statfs = ext4_statfs, 713617ba13bSMingming Cao .remount_fs = ext4_remount, 714617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 715617ba13bSMingming Cao .show_options = ext4_show_options, 716ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 717617ba13bSMingming Cao .quota_read = ext4_quota_read, 718617ba13bSMingming Cao .quota_write = ext4_quota_write, 719ac27a0ecSDave Kleikamp #endif 720ac27a0ecSDave Kleikamp }; 721ac27a0ecSDave Kleikamp 722617ba13bSMingming Cao static struct export_operations ext4_export_ops = { 723617ba13bSMingming Cao .get_parent = ext4_get_parent, 724617ba13bSMingming Cao .get_dentry = ext4_get_dentry, 725ac27a0ecSDave Kleikamp }; 726ac27a0ecSDave Kleikamp 727ac27a0ecSDave Kleikamp enum { 728ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 729ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 730ac27a0ecSDave Kleikamp Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, 731ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 732ac27a0ecSDave Kleikamp Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 733ac27a0ecSDave Kleikamp Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, 734ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 735ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 736ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 737ac27a0ecSDave Kleikamp Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 7381e2462f9SMingming Cao Opt_grpquota, Opt_extents, Opt_noextents, 739ac27a0ecSDave Kleikamp }; 740ac27a0ecSDave Kleikamp 741ac27a0ecSDave Kleikamp static match_table_t tokens = { 742ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 743ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 744ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 745ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 746ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 747ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 748ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 749ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 750ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 751ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 752ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 753ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 754ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 755ac27a0ecSDave Kleikamp {Opt_nocheck, "nocheck"}, 756ac27a0ecSDave Kleikamp {Opt_nocheck, "check=none"}, 757ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 758ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 759ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 760ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 761ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 762ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 763ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 764ac27a0ecSDave Kleikamp {Opt_reservation, "reservation"}, 765ac27a0ecSDave Kleikamp {Opt_noreservation, "noreservation"}, 766ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 767ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 768ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 769ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 770ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 771ac27a0ecSDave Kleikamp {Opt_journal_inum, "journal=%u"}, 772ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 773ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 774ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 775ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 776ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 777ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 778ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 779ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 780ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 781ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 782ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 783ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 784ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 785ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 786ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 787ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 788a86c6181SAlex Tomas {Opt_extents, "extents"}, 7891e2462f9SMingming Cao {Opt_noextents, "noextents"}, 790ac27a0ecSDave Kleikamp {Opt_err, NULL}, 791ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 792ac27a0ecSDave Kleikamp }; 793ac27a0ecSDave Kleikamp 794617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 795ac27a0ecSDave Kleikamp { 796617ba13bSMingming Cao ext4_fsblk_t sb_block; 797ac27a0ecSDave Kleikamp char *options = (char *) *data; 798ac27a0ecSDave Kleikamp 799ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 800ac27a0ecSDave Kleikamp return 1; /* Default location */ 801ac27a0ecSDave Kleikamp options += 3; 802617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 803ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 804ac27a0ecSDave Kleikamp if (*options && *options != ',') { 805617ba13bSMingming Cao printk("EXT4-fs: Invalid sb specification: %s\n", 806ac27a0ecSDave Kleikamp (char *) *data); 807ac27a0ecSDave Kleikamp return 1; 808ac27a0ecSDave Kleikamp } 809ac27a0ecSDave Kleikamp if (*options == ',') 810ac27a0ecSDave Kleikamp options++; 811ac27a0ecSDave Kleikamp *data = (void *) options; 812ac27a0ecSDave Kleikamp return sb_block; 813ac27a0ecSDave Kleikamp } 814ac27a0ecSDave Kleikamp 815ac27a0ecSDave Kleikamp static int parse_options (char *options, struct super_block *sb, 816ac27a0ecSDave Kleikamp unsigned int *inum, unsigned long *journal_devnum, 817617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 818ac27a0ecSDave Kleikamp { 819617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 820ac27a0ecSDave Kleikamp char * p; 821ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 822ac27a0ecSDave Kleikamp int data_opt = 0; 823ac27a0ecSDave Kleikamp int option; 824ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 825ac27a0ecSDave Kleikamp int qtype; 826ac27a0ecSDave Kleikamp char *qname; 827ac27a0ecSDave Kleikamp #endif 828ac27a0ecSDave Kleikamp 829ac27a0ecSDave Kleikamp if (!options) 830ac27a0ecSDave Kleikamp return 1; 831ac27a0ecSDave Kleikamp 832ac27a0ecSDave Kleikamp while ((p = strsep (&options, ",")) != NULL) { 833ac27a0ecSDave Kleikamp int token; 834ac27a0ecSDave Kleikamp if (!*p) 835ac27a0ecSDave Kleikamp continue; 836ac27a0ecSDave Kleikamp 837ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 838ac27a0ecSDave Kleikamp switch (token) { 839ac27a0ecSDave Kleikamp case Opt_bsd_df: 840ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, MINIX_DF); 841ac27a0ecSDave Kleikamp break; 842ac27a0ecSDave Kleikamp case Opt_minix_df: 843ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, MINIX_DF); 844ac27a0ecSDave Kleikamp break; 845ac27a0ecSDave Kleikamp case Opt_grpid: 846ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, GRPID); 847ac27a0ecSDave Kleikamp break; 848ac27a0ecSDave Kleikamp case Opt_nogrpid: 849ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, GRPID); 850ac27a0ecSDave Kleikamp break; 851ac27a0ecSDave Kleikamp case Opt_resuid: 852ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 853ac27a0ecSDave Kleikamp return 0; 854ac27a0ecSDave Kleikamp sbi->s_resuid = option; 855ac27a0ecSDave Kleikamp break; 856ac27a0ecSDave Kleikamp case Opt_resgid: 857ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 858ac27a0ecSDave Kleikamp return 0; 859ac27a0ecSDave Kleikamp sbi->s_resgid = option; 860ac27a0ecSDave Kleikamp break; 861ac27a0ecSDave Kleikamp case Opt_sb: 862ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 863ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 864ac27a0ecSDave Kleikamp break; 865ac27a0ecSDave Kleikamp case Opt_err_panic: 866ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 867ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 868ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_PANIC); 869ac27a0ecSDave Kleikamp break; 870ac27a0ecSDave Kleikamp case Opt_err_ro: 871ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 872ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 873ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_RO); 874ac27a0ecSDave Kleikamp break; 875ac27a0ecSDave Kleikamp case Opt_err_cont: 876ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 877ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 878ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_CONT); 879ac27a0ecSDave Kleikamp break; 880ac27a0ecSDave Kleikamp case Opt_nouid32: 881ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NO_UID32); 882ac27a0ecSDave Kleikamp break; 883ac27a0ecSDave Kleikamp case Opt_nocheck: 884ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, CHECK); 885ac27a0ecSDave Kleikamp break; 886ac27a0ecSDave Kleikamp case Opt_debug: 887ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, DEBUG); 888ac27a0ecSDave Kleikamp break; 889ac27a0ecSDave Kleikamp case Opt_oldalloc: 890ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, OLDALLOC); 891ac27a0ecSDave Kleikamp break; 892ac27a0ecSDave Kleikamp case Opt_orlov: 893ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, OLDALLOC); 894ac27a0ecSDave Kleikamp break; 895617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 896ac27a0ecSDave Kleikamp case Opt_user_xattr: 897ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, XATTR_USER); 898ac27a0ecSDave Kleikamp break; 899ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 900ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, XATTR_USER); 901ac27a0ecSDave Kleikamp break; 902ac27a0ecSDave Kleikamp #else 903ac27a0ecSDave Kleikamp case Opt_user_xattr: 904ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 905617ba13bSMingming Cao printk("EXT4 (no)user_xattr options not supported\n"); 906ac27a0ecSDave Kleikamp break; 907ac27a0ecSDave Kleikamp #endif 908617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 909ac27a0ecSDave Kleikamp case Opt_acl: 910ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 911ac27a0ecSDave Kleikamp break; 912ac27a0ecSDave Kleikamp case Opt_noacl: 913ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 914ac27a0ecSDave Kleikamp break; 915ac27a0ecSDave Kleikamp #else 916ac27a0ecSDave Kleikamp case Opt_acl: 917ac27a0ecSDave Kleikamp case Opt_noacl: 918617ba13bSMingming Cao printk("EXT4 (no)acl options not supported\n"); 919ac27a0ecSDave Kleikamp break; 920ac27a0ecSDave Kleikamp #endif 921ac27a0ecSDave Kleikamp case Opt_reservation: 922ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 923ac27a0ecSDave Kleikamp break; 924ac27a0ecSDave Kleikamp case Opt_noreservation: 925ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, RESERVATION); 926ac27a0ecSDave Kleikamp break; 927ac27a0ecSDave Kleikamp case Opt_journal_update: 928ac27a0ecSDave Kleikamp /* @@@ FIXME */ 929ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 930ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 931ac27a0ecSDave Kleikamp user to specify an existing inode to be the 932ac27a0ecSDave Kleikamp journal file. */ 933ac27a0ecSDave Kleikamp if (is_remount) { 934617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 935ac27a0ecSDave Kleikamp "journal on remount\n"); 936ac27a0ecSDave Kleikamp return 0; 937ac27a0ecSDave Kleikamp } 938ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); 939ac27a0ecSDave Kleikamp break; 940ac27a0ecSDave Kleikamp case Opt_journal_inum: 941ac27a0ecSDave Kleikamp if (is_remount) { 942617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 943ac27a0ecSDave Kleikamp "journal on remount\n"); 944ac27a0ecSDave Kleikamp return 0; 945ac27a0ecSDave Kleikamp } 946ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 947ac27a0ecSDave Kleikamp return 0; 948ac27a0ecSDave Kleikamp *inum = option; 949ac27a0ecSDave Kleikamp break; 950ac27a0ecSDave Kleikamp case Opt_journal_dev: 951ac27a0ecSDave Kleikamp if (is_remount) { 952617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 953ac27a0ecSDave Kleikamp "journal on remount\n"); 954ac27a0ecSDave Kleikamp return 0; 955ac27a0ecSDave Kleikamp } 956ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 957ac27a0ecSDave Kleikamp return 0; 958ac27a0ecSDave Kleikamp *journal_devnum = option; 959ac27a0ecSDave Kleikamp break; 960ac27a0ecSDave Kleikamp case Opt_noload: 961ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NOLOAD); 962ac27a0ecSDave Kleikamp break; 963ac27a0ecSDave Kleikamp case Opt_commit: 964ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 965ac27a0ecSDave Kleikamp return 0; 966ac27a0ecSDave Kleikamp if (option < 0) 967ac27a0ecSDave Kleikamp return 0; 968ac27a0ecSDave Kleikamp if (option == 0) 969ac27a0ecSDave Kleikamp option = JBD_DEFAULT_MAX_COMMIT_AGE; 970ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 971ac27a0ecSDave Kleikamp break; 972ac27a0ecSDave Kleikamp case Opt_data_journal: 973617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 974ac27a0ecSDave Kleikamp goto datacheck; 975ac27a0ecSDave Kleikamp case Opt_data_ordered: 976617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 977ac27a0ecSDave Kleikamp goto datacheck; 978ac27a0ecSDave Kleikamp case Opt_data_writeback: 979617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 980ac27a0ecSDave Kleikamp datacheck: 981ac27a0ecSDave Kleikamp if (is_remount) { 982617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 983ac27a0ecSDave Kleikamp != data_opt) { 984ac27a0ecSDave Kleikamp printk(KERN_ERR 985617ba13bSMingming Cao "EXT4-fs: cannot change data " 986ac27a0ecSDave Kleikamp "mode on remount\n"); 987ac27a0ecSDave Kleikamp return 0; 988ac27a0ecSDave Kleikamp } 989ac27a0ecSDave Kleikamp } else { 990617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 991ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 992ac27a0ecSDave Kleikamp } 993ac27a0ecSDave Kleikamp break; 994ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 995ac27a0ecSDave Kleikamp case Opt_usrjquota: 996ac27a0ecSDave Kleikamp qtype = USRQUOTA; 997ac27a0ecSDave Kleikamp goto set_qf_name; 998ac27a0ecSDave Kleikamp case Opt_grpjquota: 999ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1000ac27a0ecSDave Kleikamp set_qf_name: 1001ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1002ac27a0ecSDave Kleikamp printk(KERN_ERR 1003617ba13bSMingming Cao "EXT4-fs: Cannot change journalled " 1004ac27a0ecSDave Kleikamp "quota options when quota turned on.\n"); 1005ac27a0ecSDave Kleikamp return 0; 1006ac27a0ecSDave Kleikamp } 1007ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1008ac27a0ecSDave Kleikamp if (!qname) { 1009ac27a0ecSDave Kleikamp printk(KERN_ERR 1010617ba13bSMingming Cao "EXT4-fs: not enough memory for " 1011ac27a0ecSDave Kleikamp "storing quotafile name.\n"); 1012ac27a0ecSDave Kleikamp return 0; 1013ac27a0ecSDave Kleikamp } 1014ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1015ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1016ac27a0ecSDave Kleikamp printk(KERN_ERR 1017617ba13bSMingming Cao "EXT4-fs: %s quota file already " 1018ac27a0ecSDave Kleikamp "specified.\n", QTYPE2NAME(qtype)); 1019ac27a0ecSDave Kleikamp kfree(qname); 1020ac27a0ecSDave Kleikamp return 0; 1021ac27a0ecSDave Kleikamp } 1022ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1023ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1024ac27a0ecSDave Kleikamp printk(KERN_ERR 1025617ba13bSMingming Cao "EXT4-fs: quotafile must be on " 1026ac27a0ecSDave Kleikamp "filesystem root.\n"); 1027ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1028ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1029ac27a0ecSDave Kleikamp return 0; 1030ac27a0ecSDave Kleikamp } 1031ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1032ac27a0ecSDave Kleikamp break; 1033ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1034ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1035ac27a0ecSDave Kleikamp goto clear_qf_name; 1036ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1037ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1038ac27a0ecSDave Kleikamp clear_qf_name: 1039ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1040617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 1041ac27a0ecSDave Kleikamp "journalled quota options when " 1042ac27a0ecSDave Kleikamp "quota turned on.\n"); 1043ac27a0ecSDave Kleikamp return 0; 1044ac27a0ecSDave Kleikamp } 1045ac27a0ecSDave Kleikamp /* 1046ac27a0ecSDave Kleikamp * The space will be released later when all options 1047ac27a0ecSDave Kleikamp * are confirmed to be correct 1048ac27a0ecSDave Kleikamp */ 1049ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1050ac27a0ecSDave Kleikamp break; 1051ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1052ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = QFMT_VFS_OLD; 1053ac27a0ecSDave Kleikamp break; 1054ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1055ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = QFMT_VFS_V0; 1056ac27a0ecSDave Kleikamp break; 1057ac27a0ecSDave Kleikamp case Opt_quota: 1058ac27a0ecSDave Kleikamp case Opt_usrquota: 1059ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1060ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1061ac27a0ecSDave Kleikamp break; 1062ac27a0ecSDave Kleikamp case Opt_grpquota: 1063ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1064ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1065ac27a0ecSDave Kleikamp break; 1066ac27a0ecSDave Kleikamp case Opt_noquota: 1067ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1068617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1069ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1070ac27a0ecSDave Kleikamp return 0; 1071ac27a0ecSDave Kleikamp } 1072ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1073ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1074ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1075ac27a0ecSDave Kleikamp break; 1076ac27a0ecSDave Kleikamp #else 1077ac27a0ecSDave Kleikamp case Opt_quota: 1078ac27a0ecSDave Kleikamp case Opt_usrquota: 1079ac27a0ecSDave Kleikamp case Opt_grpquota: 1080ac27a0ecSDave Kleikamp case Opt_usrjquota: 1081ac27a0ecSDave Kleikamp case Opt_grpjquota: 1082ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1083ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1084ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1085ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1086ac27a0ecSDave Kleikamp printk(KERN_ERR 1087617ba13bSMingming Cao "EXT4-fs: journalled quota options not " 1088ac27a0ecSDave Kleikamp "supported.\n"); 1089ac27a0ecSDave Kleikamp break; 1090ac27a0ecSDave Kleikamp case Opt_noquota: 1091ac27a0ecSDave Kleikamp break; 1092ac27a0ecSDave Kleikamp #endif 1093ac27a0ecSDave Kleikamp case Opt_abort: 1094ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1095ac27a0ecSDave Kleikamp break; 1096ac27a0ecSDave Kleikamp case Opt_barrier: 1097ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1098ac27a0ecSDave Kleikamp return 0; 1099ac27a0ecSDave Kleikamp if (option) 1100ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1101ac27a0ecSDave Kleikamp else 1102ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1103ac27a0ecSDave Kleikamp break; 1104ac27a0ecSDave Kleikamp case Opt_ignore: 1105ac27a0ecSDave Kleikamp break; 1106ac27a0ecSDave Kleikamp case Opt_resize: 1107ac27a0ecSDave Kleikamp if (!is_remount) { 1108617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1109ac27a0ecSDave Kleikamp "for remount\n"); 1110ac27a0ecSDave Kleikamp return 0; 1111ac27a0ecSDave Kleikamp } 1112ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1113ac27a0ecSDave Kleikamp return 0; 1114ac27a0ecSDave Kleikamp *n_blocks_count = option; 1115ac27a0ecSDave Kleikamp break; 1116ac27a0ecSDave Kleikamp case Opt_nobh: 1117ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1118ac27a0ecSDave Kleikamp break; 1119ac27a0ecSDave Kleikamp case Opt_bh: 1120ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1121ac27a0ecSDave Kleikamp break; 1122a86c6181SAlex Tomas case Opt_extents: 1123a86c6181SAlex Tomas set_opt (sbi->s_mount_opt, EXTENTS); 1124a86c6181SAlex Tomas break; 11251e2462f9SMingming Cao case Opt_noextents: 11261e2462f9SMingming Cao clear_opt (sbi->s_mount_opt, EXTENTS); 11271e2462f9SMingming Cao break; 1128ac27a0ecSDave Kleikamp default: 1129ac27a0ecSDave Kleikamp printk (KERN_ERR 1130617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1131ac27a0ecSDave Kleikamp "or missing value\n", p); 1132ac27a0ecSDave Kleikamp return 0; 1133ac27a0ecSDave Kleikamp } 1134ac27a0ecSDave Kleikamp } 1135ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1136ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1137617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1138ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1139ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1140ac27a0ecSDave Kleikamp 1141617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1142ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1143ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1144ac27a0ecSDave Kleikamp 1145ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1146617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1147ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1148617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1149617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1150ac27a0ecSDave Kleikamp "format mixing.\n"); 1151ac27a0ecSDave Kleikamp return 0; 1152ac27a0ecSDave Kleikamp } 1153ac27a0ecSDave Kleikamp 1154ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1155617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journalled quota format " 1156ac27a0ecSDave Kleikamp "not specified.\n"); 1157ac27a0ecSDave Kleikamp return 0; 1158ac27a0ecSDave Kleikamp } 1159ac27a0ecSDave Kleikamp } else { 1160ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1161617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journalled quota format " 1162ac27a0ecSDave Kleikamp "specified with no journalling " 1163ac27a0ecSDave Kleikamp "enabled.\n"); 1164ac27a0ecSDave Kleikamp return 0; 1165ac27a0ecSDave Kleikamp } 1166ac27a0ecSDave Kleikamp } 1167ac27a0ecSDave Kleikamp #endif 1168ac27a0ecSDave Kleikamp return 1; 1169ac27a0ecSDave Kleikamp } 1170ac27a0ecSDave Kleikamp 1171617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1172ac27a0ecSDave Kleikamp int read_only) 1173ac27a0ecSDave Kleikamp { 1174617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1175ac27a0ecSDave Kleikamp int res = 0; 1176ac27a0ecSDave Kleikamp 1177617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1178617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs warning: revision level too high, " 1179ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1180ac27a0ecSDave Kleikamp res = MS_RDONLY; 1181ac27a0ecSDave Kleikamp } 1182ac27a0ecSDave Kleikamp if (read_only) 1183ac27a0ecSDave Kleikamp return res; 1184617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1185617ba13bSMingming Cao printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1186ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1187617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1188ac27a0ecSDave Kleikamp printk (KERN_WARNING 1189617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1190ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1191ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1192ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1193ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1194ac27a0ecSDave Kleikamp printk (KERN_WARNING 1195617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1196ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1197ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1198ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1199ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1200ac27a0ecSDave Kleikamp printk (KERN_WARNING 1201617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1202ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1203ac27a0ecSDave Kleikamp #if 0 1204ac27a0ecSDave Kleikamp /* @@@ We _will_ want to clear the valid bit if we find 120563f57933SAndrew Morton * inconsistencies, to force a fsck at reboot. But for 120663f57933SAndrew Morton * a plain journaled filesystem we can keep it set as 120763f57933SAndrew Morton * valid forever! :) 120863f57933SAndrew Morton */ 1209617ba13bSMingming Cao es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT4_VALID_FS); 1210ac27a0ecSDave Kleikamp #endif 1211ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1212617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1213ac27a0ecSDave Kleikamp es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1); 1214ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1215617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 1216617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1217ac27a0ecSDave Kleikamp 1218617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1219ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1220617ba13bSMingming Cao printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " 1221ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1222ac27a0ecSDave Kleikamp sb->s_blocksize, 1223ac27a0ecSDave Kleikamp sbi->s_groups_count, 1224617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1225617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1226ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1227ac27a0ecSDave Kleikamp 1228617ba13bSMingming Cao printk(KERN_INFO "EXT4 FS on %s, ", sb->s_id); 1229617ba13bSMingming Cao if (EXT4_SB(sb)->s_journal->j_inode == NULL) { 1230ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 1231ac27a0ecSDave Kleikamp 1232ac27a0ecSDave Kleikamp printk("external journal on %s\n", 1233617ba13bSMingming Cao bdevname(EXT4_SB(sb)->s_journal->j_dev, b)); 1234ac27a0ecSDave Kleikamp } else { 1235ac27a0ecSDave Kleikamp printk("internal journal\n"); 1236ac27a0ecSDave Kleikamp } 1237ac27a0ecSDave Kleikamp return res; 1238ac27a0ecSDave Kleikamp } 1239ac27a0ecSDave Kleikamp 1240ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1241617ba13bSMingming Cao static int ext4_check_descriptors (struct super_block * sb) 1242ac27a0ecSDave Kleikamp { 1243617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1244617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1245617ba13bSMingming Cao ext4_fsblk_t last_block; 1246bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1247bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1248bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1249617ba13bSMingming Cao struct ext4_group_desc * gdp = NULL; 1250ac27a0ecSDave Kleikamp int desc_block = 0; 1251ac27a0ecSDave Kleikamp int i; 1252ac27a0ecSDave Kleikamp 1253617ba13bSMingming Cao ext4_debug ("Checking group descriptors"); 1254ac27a0ecSDave Kleikamp 1255ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_groups_count; i++) 1256ac27a0ecSDave Kleikamp { 1257ac27a0ecSDave Kleikamp if (i == sbi->s_groups_count - 1) 1258bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1259ac27a0ecSDave Kleikamp else 1260ac27a0ecSDave Kleikamp last_block = first_block + 1261617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1262ac27a0ecSDave Kleikamp 1263617ba13bSMingming Cao if ((i % EXT4_DESC_PER_BLOCK(sb)) == 0) 1264617ba13bSMingming Cao gdp = (struct ext4_group_desc *) 1265ac27a0ecSDave Kleikamp sbi->s_group_desc[desc_block++]->b_data; 12668fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 1267bd81d8eeSLaurent Vivier if (block_bitmap < first_block || block_bitmap > last_block) 1268ac27a0ecSDave Kleikamp { 1269617ba13bSMingming Cao ext4_error (sb, "ext4_check_descriptors", 1270ac27a0ecSDave Kleikamp "Block bitmap for group %d" 12712ae02107SMingming Cao " not in group (block %llu)!", 1272bd81d8eeSLaurent Vivier i, block_bitmap); 1273ac27a0ecSDave Kleikamp return 0; 1274ac27a0ecSDave Kleikamp } 12758fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 1276bd81d8eeSLaurent Vivier if (inode_bitmap < first_block || inode_bitmap > last_block) 1277ac27a0ecSDave Kleikamp { 1278617ba13bSMingming Cao ext4_error (sb, "ext4_check_descriptors", 1279ac27a0ecSDave Kleikamp "Inode bitmap for group %d" 12802ae02107SMingming Cao " not in group (block %llu)!", 1281bd81d8eeSLaurent Vivier i, inode_bitmap); 1282ac27a0ecSDave Kleikamp return 0; 1283ac27a0ecSDave Kleikamp } 12848fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1285bd81d8eeSLaurent Vivier if (inode_table < first_block || 1286780dcdb2SEric Sandeen inode_table + sbi->s_itb_per_group - 1 > last_block) 1287ac27a0ecSDave Kleikamp { 1288617ba13bSMingming Cao ext4_error (sb, "ext4_check_descriptors", 1289ac27a0ecSDave Kleikamp "Inode table for group %d" 12902ae02107SMingming Cao " not in group (block %llu)!", 1291bd81d8eeSLaurent Vivier i, inode_table); 1292ac27a0ecSDave Kleikamp return 0; 1293ac27a0ecSDave Kleikamp } 1294617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 12950d1ee42fSAlexandre Ratchov gdp = (struct ext4_group_desc *) 12960d1ee42fSAlexandre Ratchov ((__u8 *)gdp + EXT4_DESC_SIZE(sb)); 1297ac27a0ecSDave Kleikamp } 1298ac27a0ecSDave Kleikamp 1299bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1300617ba13bSMingming Cao sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb)); 1301ac27a0ecSDave Kleikamp return 1; 1302ac27a0ecSDave Kleikamp } 1303ac27a0ecSDave Kleikamp 1304ac27a0ecSDave Kleikamp 1305617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1306ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1307ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1308ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1309ac27a0ecSDave Kleikamp * 1310ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1311ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1312ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1313ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1314ac27a0ecSDave Kleikamp * 1315ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1316ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1317ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1318617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1319ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1320ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1321ac27a0ecSDave Kleikamp */ 1322617ba13bSMingming Cao static void ext4_orphan_cleanup (struct super_block * sb, 1323617ba13bSMingming Cao struct ext4_super_block * es) 1324ac27a0ecSDave Kleikamp { 1325ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1326ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1327ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1328ac27a0ecSDave Kleikamp int i; 1329ac27a0ecSDave Kleikamp #endif 1330ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1331ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1332ac27a0ecSDave Kleikamp return; 1333ac27a0ecSDave Kleikamp } 1334ac27a0ecSDave Kleikamp 1335a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1336a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1337a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1338a8f48a95SEric Sandeen return; 1339a8f48a95SEric Sandeen } 1340a8f48a95SEric Sandeen 1341617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1342ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1343ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1344ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1345ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1346ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1347ac27a0ecSDave Kleikamp return; 1348ac27a0ecSDave Kleikamp } 1349ac27a0ecSDave Kleikamp 1350ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1351617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1352ac27a0ecSDave Kleikamp sb->s_id); 1353ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1354ac27a0ecSDave Kleikamp } 1355ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1356ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1357ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1358ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1359ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1360617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1361617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1362ac27a0ecSDave Kleikamp if (ret < 0) 1363ac27a0ecSDave Kleikamp printk(KERN_ERR 1364617ba13bSMingming Cao "EXT4-fs: Cannot turn on journalled " 1365ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1366ac27a0ecSDave Kleikamp } 1367ac27a0ecSDave Kleikamp } 1368ac27a0ecSDave Kleikamp #endif 1369ac27a0ecSDave Kleikamp 1370ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1371ac27a0ecSDave Kleikamp struct inode *inode; 1372ac27a0ecSDave Kleikamp 1373ac27a0ecSDave Kleikamp if (!(inode = 1374617ba13bSMingming Cao ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) { 1375ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1376ac27a0ecSDave Kleikamp break; 1377ac27a0ecSDave Kleikamp } 1378ac27a0ecSDave Kleikamp 1379617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1380ac27a0ecSDave Kleikamp DQUOT_INIT(inode); 1381ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1382ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1383ac27a0ecSDave Kleikamp "%s: truncating inode %lu to %Ld bytes\n", 1384ac27a0ecSDave Kleikamp __FUNCTION__, inode->i_ino, inode->i_size); 1385ac27a0ecSDave Kleikamp jbd_debug(2, "truncating inode %lu to %Ld bytes\n", 1386ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1387617ba13bSMingming Cao ext4_truncate(inode); 1388ac27a0ecSDave Kleikamp nr_truncates++; 1389ac27a0ecSDave Kleikamp } else { 1390ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1391ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 1392ac27a0ecSDave Kleikamp __FUNCTION__, inode->i_ino); 1393ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1394ac27a0ecSDave Kleikamp inode->i_ino); 1395ac27a0ecSDave Kleikamp nr_orphans++; 1396ac27a0ecSDave Kleikamp } 1397ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1398ac27a0ecSDave Kleikamp } 1399ac27a0ecSDave Kleikamp 1400ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x)==1) ? "" : "s" 1401ac27a0ecSDave Kleikamp 1402ac27a0ecSDave Kleikamp if (nr_orphans) 1403617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1404ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1405ac27a0ecSDave Kleikamp if (nr_truncates) 1406617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1407ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1408ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1409ac27a0ecSDave Kleikamp /* Turn quotas off */ 1410ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1411ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 1412ac27a0ecSDave Kleikamp vfs_quota_off(sb, i); 1413ac27a0ecSDave Kleikamp } 1414ac27a0ecSDave Kleikamp #endif 1415ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1416ac27a0ecSDave Kleikamp } 1417ac27a0ecSDave Kleikamp 1418ac27a0ecSDave Kleikamp /* 1419ac27a0ecSDave Kleikamp * Maximal file size. There is a direct, and {,double-,triple-}indirect 1420ac27a0ecSDave Kleikamp * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. 1421ac27a0ecSDave Kleikamp * We need to be 1 filesystem block less than the 2^32 sector limit. 1422ac27a0ecSDave Kleikamp */ 1423617ba13bSMingming Cao static loff_t ext4_max_size(int bits) 1424ac27a0ecSDave Kleikamp { 1425617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 1426ac27a0ecSDave Kleikamp /* This constant is calculated to be the largest file size for a 1427ac27a0ecSDave Kleikamp * dense, 4k-blocksize file such that the total number of 1428ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 1429ac27a0ecSDave Kleikamp * does not exceed 2^32. */ 1430ac27a0ecSDave Kleikamp const loff_t upper_limit = 0x1ff7fffd000LL; 1431ac27a0ecSDave Kleikamp 1432ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1433ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1434ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1435ac27a0ecSDave Kleikamp res <<= bits; 1436ac27a0ecSDave Kleikamp if (res > upper_limit) 1437ac27a0ecSDave Kleikamp res = upper_limit; 1438ac27a0ecSDave Kleikamp return res; 1439ac27a0ecSDave Kleikamp } 1440ac27a0ecSDave Kleikamp 1441617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 144270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1443ac27a0ecSDave Kleikamp { 1444617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1445ac27a0ecSDave Kleikamp unsigned long bg, first_meta_bg; 1446ac27a0ecSDave Kleikamp int has_super = 0; 1447ac27a0ecSDave Kleikamp 1448ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 1449ac27a0ecSDave Kleikamp 1450617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 1451ac27a0ecSDave Kleikamp nr < first_meta_bg) 145270bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 1453ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 1454617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 1455ac27a0ecSDave Kleikamp has_super = 1; 1456617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 1457ac27a0ecSDave Kleikamp } 1458ac27a0ecSDave Kleikamp 1459ac27a0ecSDave Kleikamp 1460617ba13bSMingming Cao static int ext4_fill_super (struct super_block *sb, void *data, int silent) 1461ac27a0ecSDave Kleikamp { 1462ac27a0ecSDave Kleikamp struct buffer_head * bh; 1463617ba13bSMingming Cao struct ext4_super_block *es = NULL; 1464617ba13bSMingming Cao struct ext4_sb_info *sbi; 1465617ba13bSMingming Cao ext4_fsblk_t block; 1466617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 146770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 1468ac27a0ecSDave Kleikamp unsigned long offset = 0; 1469ac27a0ecSDave Kleikamp unsigned int journal_inum = 0; 1470ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 1471ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 1472ac27a0ecSDave Kleikamp struct inode *root; 1473ac27a0ecSDave Kleikamp int blocksize; 1474ac27a0ecSDave Kleikamp int hblock; 1475ac27a0ecSDave Kleikamp int db_count; 1476ac27a0ecSDave Kleikamp int i; 1477ac27a0ecSDave Kleikamp int needs_recovery; 1478ac27a0ecSDave Kleikamp __le32 features; 1479bd81d8eeSLaurent Vivier __u64 blocks_count; 1480833f4077SPeter Zijlstra int err; 1481ac27a0ecSDave Kleikamp 1482ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 1483ac27a0ecSDave Kleikamp if (!sbi) 1484ac27a0ecSDave Kleikamp return -ENOMEM; 1485ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 1486ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 1487617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 1488617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 1489ac27a0ecSDave Kleikamp 1490ac27a0ecSDave Kleikamp unlock_kernel(); 1491ac27a0ecSDave Kleikamp 1492617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 1493ac27a0ecSDave Kleikamp if (!blocksize) { 1494617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 1495ac27a0ecSDave Kleikamp goto out_fail; 1496ac27a0ecSDave Kleikamp } 1497ac27a0ecSDave Kleikamp 1498ac27a0ecSDave Kleikamp /* 1499617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 1500ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 1501ac27a0ecSDave Kleikamp */ 1502617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 150370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 150470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 1505ac27a0ecSDave Kleikamp } else { 150670bbb3e0SAndrew Morton logical_sb_block = sb_block; 1507ac27a0ecSDave Kleikamp } 1508ac27a0ecSDave Kleikamp 150970bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 1510617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: unable to read superblock\n"); 1511ac27a0ecSDave Kleikamp goto out_fail; 1512ac27a0ecSDave Kleikamp } 1513ac27a0ecSDave Kleikamp /* 1514ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 1515617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 1516ac27a0ecSDave Kleikamp */ 1517617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 1518ac27a0ecSDave Kleikamp sbi->s_es = es; 1519ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 1520617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 1521617ba13bSMingming Cao goto cantfind_ext4; 1522ac27a0ecSDave Kleikamp 1523ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 1524ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1525617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 1526ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1527617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 1528ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1529617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 1530ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 15312e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_XATTR 1532617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 1533ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 15342e7842b8SHugh Dickins #endif 15352e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 1536617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 1537ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 15382e7842b8SHugh Dickins #endif 1539617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 1540617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 1541617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 1542617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 1543617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 1544617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 1545ac27a0ecSDave Kleikamp 1546617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 1547ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1548617ba13bSMingming Cao else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_RO) 1549ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1550ceea16bfSDmitry Mishin else 1551ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 1552ac27a0ecSDave Kleikamp 1553ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 1554ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 1555ac27a0ecSDave Kleikamp 1556ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1557ac27a0ecSDave Kleikamp 15581e2462f9SMingming Cao /* 15591e2462f9SMingming Cao * turn on extents feature by default in ext4 filesystem 15601e2462f9SMingming Cao * User -o noextents to turn it off 15611e2462f9SMingming Cao */ 15621e2462f9SMingming Cao set_opt(sbi->s_mount_opt, EXTENTS); 15631e2462f9SMingming Cao 1564ac27a0ecSDave Kleikamp if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, 1565ac27a0ecSDave Kleikamp NULL, 0)) 1566ac27a0ecSDave Kleikamp goto failed_mount; 1567ac27a0ecSDave Kleikamp 1568ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1569617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1570ac27a0ecSDave Kleikamp 1571617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 1572617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 1573617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 1574617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 1575ac27a0ecSDave Kleikamp printk(KERN_WARNING 1576617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 1577ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1578ac27a0ecSDave Kleikamp /* 1579ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 1580ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 1581ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 1582ac27a0ecSDave Kleikamp */ 1583617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 1584ac27a0ecSDave Kleikamp if (features) { 1585617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 1586ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 1587ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 1588ac27a0ecSDave Kleikamp goto failed_mount; 1589ac27a0ecSDave Kleikamp } 1590617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 1591ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 1592617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 1593ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 1594ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 1595ac27a0ecSDave Kleikamp goto failed_mount; 1596ac27a0ecSDave Kleikamp } 1597ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 1598ac27a0ecSDave Kleikamp 1599617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 1600617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 1601ac27a0ecSDave Kleikamp printk(KERN_ERR 1602617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 1603ac27a0ecSDave Kleikamp blocksize, sb->s_id); 1604ac27a0ecSDave Kleikamp goto failed_mount; 1605ac27a0ecSDave Kleikamp } 1606ac27a0ecSDave Kleikamp 1607ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(sb->s_bdev); 1608ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 1609ac27a0ecSDave Kleikamp /* 1610ac27a0ecSDave Kleikamp * Make sure the blocksize for the filesystem is larger 1611ac27a0ecSDave Kleikamp * than the hardware sectorsize for the machine. 1612ac27a0ecSDave Kleikamp */ 1613ac27a0ecSDave Kleikamp if (blocksize < hblock) { 1614617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: blocksize %d too small for " 1615ac27a0ecSDave Kleikamp "device blocksize %d.\n", blocksize, hblock); 1616ac27a0ecSDave Kleikamp goto failed_mount; 1617ac27a0ecSDave Kleikamp } 1618ac27a0ecSDave Kleikamp 1619ac27a0ecSDave Kleikamp brelse (bh); 1620ac27a0ecSDave Kleikamp sb_set_blocksize(sb, blocksize); 162170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 162270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 162370bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 1624ac27a0ecSDave Kleikamp if (!bh) { 1625ac27a0ecSDave Kleikamp printk(KERN_ERR 1626617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 1627ac27a0ecSDave Kleikamp goto failed_mount; 1628ac27a0ecSDave Kleikamp } 1629617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 1630ac27a0ecSDave Kleikamp sbi->s_es = es; 1631617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 1632ac27a0ecSDave Kleikamp printk (KERN_ERR 1633617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 1634ac27a0ecSDave Kleikamp goto failed_mount; 1635ac27a0ecSDave Kleikamp } 1636ac27a0ecSDave Kleikamp } 1637ac27a0ecSDave Kleikamp 1638617ba13bSMingming Cao sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits); 1639ac27a0ecSDave Kleikamp 1640617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 1641617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 1642617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 1643ac27a0ecSDave Kleikamp } else { 1644ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 1645ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 1646617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 16471330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 1648ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 1649ac27a0ecSDave Kleikamp printk (KERN_ERR 1650617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 1651ac27a0ecSDave Kleikamp sbi->s_inode_size); 1652ac27a0ecSDave Kleikamp goto failed_mount; 1653ac27a0ecSDave Kleikamp } 1654ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 1655ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 1656ac27a0ecSDave Kleikamp } 1657617ba13bSMingming Cao sbi->s_frag_size = EXT4_MIN_FRAG_SIZE << 1658ac27a0ecSDave Kleikamp le32_to_cpu(es->s_log_frag_size); 1659ac27a0ecSDave Kleikamp if (blocksize != sbi->s_frag_size) { 1660ac27a0ecSDave Kleikamp printk(KERN_ERR 1661617ba13bSMingming Cao "EXT4-fs: fragsize %lu != blocksize %u (unsupported)\n", 1662ac27a0ecSDave Kleikamp sbi->s_frag_size, blocksize); 1663ac27a0ecSDave Kleikamp goto failed_mount; 1664ac27a0ecSDave Kleikamp } 16650d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 16660d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 16678fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 16680d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 16690d1ee42fSAlexandre Ratchov sbi->s_desc_size & (sbi->s_desc_size - 1)) { 16700d1ee42fSAlexandre Ratchov printk(KERN_ERR 16718fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 16720d1ee42fSAlexandre Ratchov sbi->s_desc_size); 16730d1ee42fSAlexandre Ratchov goto failed_mount; 16740d1ee42fSAlexandre Ratchov } 16750d1ee42fSAlexandre Ratchov } else 16760d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 1677ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 1678ac27a0ecSDave Kleikamp sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); 1679ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 1680617ba13bSMingming Cao if (EXT4_INODE_SIZE(sb) == 0) 1681617ba13bSMingming Cao goto cantfind_ext4; 1682617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 1683ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 1684617ba13bSMingming Cao goto cantfind_ext4; 1685ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 1686ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 16870d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 1688ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 1689ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 1690*e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 1691*e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 1692ac27a0ecSDave Kleikamp for (i=0; i < 4; i++) 1693ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 1694ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 1695ac27a0ecSDave Kleikamp 1696ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 1697ac27a0ecSDave Kleikamp printk (KERN_ERR 1698617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 1699ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 1700ac27a0ecSDave Kleikamp goto failed_mount; 1701ac27a0ecSDave Kleikamp } 1702ac27a0ecSDave Kleikamp if (sbi->s_frags_per_group > blocksize * 8) { 1703ac27a0ecSDave Kleikamp printk (KERN_ERR 1704617ba13bSMingming Cao "EXT4-fs: #fragments per group too big: %lu\n", 1705ac27a0ecSDave Kleikamp sbi->s_frags_per_group); 1706ac27a0ecSDave Kleikamp goto failed_mount; 1707ac27a0ecSDave Kleikamp } 1708ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 1709ac27a0ecSDave Kleikamp printk (KERN_ERR 1710617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 1711ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 1712ac27a0ecSDave Kleikamp goto failed_mount; 1713ac27a0ecSDave Kleikamp } 1714ac27a0ecSDave Kleikamp 1715bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 1716ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 1717617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 1718ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 1719ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 1720617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 1721ac27a0ecSDave Kleikamp "enabled\n"); 1722ac27a0ecSDave Kleikamp goto failed_mount; 1723ac27a0ecSDave Kleikamp } 1724ac27a0ecSDave Kleikamp 1725617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 1726617ba13bSMingming Cao goto cantfind_ext4; 1727bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 1728bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 1729bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 1730bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 1731bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 1732617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 1733617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 1734ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), 1735ac27a0ecSDave Kleikamp GFP_KERNEL); 1736ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 1737617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: not enough memory\n"); 1738ac27a0ecSDave Kleikamp goto failed_mount; 1739ac27a0ecSDave Kleikamp } 1740ac27a0ecSDave Kleikamp 1741ac27a0ecSDave Kleikamp bgl_lock_init(&sbi->s_blockgroup_lock); 1742ac27a0ecSDave Kleikamp 1743ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 174470bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 1745ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 1746ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 1747617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: " 1748ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 1749ac27a0ecSDave Kleikamp db_count = i; 1750ac27a0ecSDave Kleikamp goto failed_mount2; 1751ac27a0ecSDave Kleikamp } 1752ac27a0ecSDave Kleikamp } 1753617ba13bSMingming Cao if (!ext4_check_descriptors (sb)) { 1754617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 1755ac27a0ecSDave Kleikamp goto failed_mount2; 1756ac27a0ecSDave Kleikamp } 1757ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 1758ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 1759ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 1760ac27a0ecSDave Kleikamp 1761833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 1762617ba13bSMingming Cao ext4_count_free_blocks(sb)); 1763833f4077SPeter Zijlstra if (!err) { 1764833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 1765617ba13bSMingming Cao ext4_count_free_inodes(sb)); 1766833f4077SPeter Zijlstra } 1767833f4077SPeter Zijlstra if (!err) { 1768833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 1769617ba13bSMingming Cao ext4_count_dirs(sb)); 1770833f4077SPeter Zijlstra } 1771833f4077SPeter Zijlstra if (err) { 1772833f4077SPeter Zijlstra printk(KERN_ERR "EXT4-fs: insufficient memory\n"); 1773833f4077SPeter Zijlstra goto failed_mount3; 1774833f4077SPeter Zijlstra } 1775ac27a0ecSDave Kleikamp 1776ac27a0ecSDave Kleikamp /* per fileystem reservation list head & lock */ 1777ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_rsv_window_lock); 1778ac27a0ecSDave Kleikamp sbi->s_rsv_window_root = RB_ROOT; 1779ac27a0ecSDave Kleikamp /* Add a single, static dummy reservation to the start of the 1780ac27a0ecSDave Kleikamp * reservation window list --- it gives us a placeholder for 1781ac27a0ecSDave Kleikamp * append-at-start-of-list which makes the allocation logic 1782ac27a0ecSDave Kleikamp * _much_ simpler. */ 1783617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 1784617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 1785ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_alloc_hit = 0; 1786ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_goal_size = 0; 1787617ba13bSMingming Cao ext4_rsv_window_add(sb, &sbi->s_rsv_window_head); 1788ac27a0ecSDave Kleikamp 1789ac27a0ecSDave Kleikamp /* 1790ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 1791ac27a0ecSDave Kleikamp */ 1792617ba13bSMingming Cao sb->s_op = &ext4_sops; 1793617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 1794617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 1795ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1796617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 1797617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 1798ac27a0ecSDave Kleikamp #endif 1799ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 1800ac27a0ecSDave Kleikamp 1801ac27a0ecSDave Kleikamp sb->s_root = NULL; 1802ac27a0ecSDave Kleikamp 1803ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 1804617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 1805617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 1806ac27a0ecSDave Kleikamp 1807ac27a0ecSDave Kleikamp /* 1808ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 1809ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 1810ac27a0ecSDave Kleikamp */ 1811ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 1812617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 1813617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 1814ac27a0ecSDave Kleikamp goto failed_mount3; 1815ac27a0ecSDave Kleikamp } else if (journal_inum) { 1816617ba13bSMingming Cao if (ext4_create_journal(sb, es, journal_inum)) 1817ac27a0ecSDave Kleikamp goto failed_mount3; 1818ac27a0ecSDave Kleikamp } else { 1819ac27a0ecSDave Kleikamp if (!silent) 1820ac27a0ecSDave Kleikamp printk (KERN_ERR 1821617ba13bSMingming Cao "ext4: No journal on filesystem on %s\n", 1822ac27a0ecSDave Kleikamp sb->s_id); 1823ac27a0ecSDave Kleikamp goto failed_mount3; 1824ac27a0ecSDave Kleikamp } 1825ac27a0ecSDave Kleikamp 1826eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 1827eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 1828eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 1829eb40a09cSJose R. Santos printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); 1830eb40a09cSJose R. Santos goto failed_mount4; 1831eb40a09cSJose R. Santos } 1832eb40a09cSJose R. Santos 1833ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 1834ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 1835ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 1836ac27a0ecSDave Kleikamp case 0: 1837ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 183863f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 183963f57933SAndrew Morton * cope, else JOURNAL_DATA 184063f57933SAndrew Morton */ 1841dab291afSMingming Cao if (jbd2_journal_check_available_features 1842dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 1843ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 1844ac27a0ecSDave Kleikamp else 1845ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 1846ac27a0ecSDave Kleikamp break; 1847ac27a0ecSDave Kleikamp 1848617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 1849617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 1850dab291afSMingming Cao if (!jbd2_journal_check_available_features 1851dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 1852617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 1853ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 1854ac27a0ecSDave Kleikamp goto failed_mount4; 1855ac27a0ecSDave Kleikamp } 1856ac27a0ecSDave Kleikamp default: 1857ac27a0ecSDave Kleikamp break; 1858ac27a0ecSDave Kleikamp } 1859ac27a0ecSDave Kleikamp 1860ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 1861617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 1862617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 1863ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 1864ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1865ac27a0ecSDave Kleikamp } 1866ac27a0ecSDave Kleikamp } 1867ac27a0ecSDave Kleikamp /* 1868dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 1869ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 1870ac27a0ecSDave Kleikamp */ 1871ac27a0ecSDave Kleikamp 1872617ba13bSMingming Cao root = iget(sb, EXT4_ROOT_INO); 1873ac27a0ecSDave Kleikamp sb->s_root = d_alloc_root(root); 1874ac27a0ecSDave Kleikamp if (!sb->s_root) { 1875617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 1876ac27a0ecSDave Kleikamp iput(root); 1877ac27a0ecSDave Kleikamp goto failed_mount4; 1878ac27a0ecSDave Kleikamp } 1879ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 1880ac27a0ecSDave Kleikamp dput(sb->s_root); 1881ac27a0ecSDave Kleikamp sb->s_root = NULL; 1882617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 1883ac27a0ecSDave Kleikamp goto failed_mount4; 1884ac27a0ecSDave Kleikamp } 1885ac27a0ecSDave Kleikamp 1886617ba13bSMingming Cao ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY); 1887ef7f3835SKalpak Shah 1888ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 1889ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 1890ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 1891ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 1892ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1893ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 1894ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 1895ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 1896ef7f3835SKalpak Shah sbi->s_want_extra_isize = 1897ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 1898ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 1899ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 1900ef7f3835SKalpak Shah sbi->s_want_extra_isize = 1901ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 1902ef7f3835SKalpak Shah } 1903ef7f3835SKalpak Shah } 1904ef7f3835SKalpak Shah /* Check if enough inode space is available */ 1905ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 1906ef7f3835SKalpak Shah sbi->s_inode_size) { 1907ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 1908ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 1909ef7f3835SKalpak Shah printk(KERN_INFO "EXT4-fs: required extra inode space not" 1910ef7f3835SKalpak Shah "available.\n"); 1911ef7f3835SKalpak Shah } 1912ef7f3835SKalpak Shah 1913ac27a0ecSDave Kleikamp /* 1914ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 1915ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 1916ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 1917ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 1918ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 1919ac27a0ecSDave Kleikamp * superblock lock. 1920ac27a0ecSDave Kleikamp */ 1921617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 1922617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 1923617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 1924ac27a0ecSDave Kleikamp if (needs_recovery) 1925617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: recovery complete.\n"); 1926617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 1927617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", 1928617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": 1929617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": 1930ac27a0ecSDave Kleikamp "writeback"); 1931ac27a0ecSDave Kleikamp 1932a86c6181SAlex Tomas ext4_ext_init(sb); 1933a86c6181SAlex Tomas 1934ac27a0ecSDave Kleikamp lock_kernel(); 1935ac27a0ecSDave Kleikamp return 0; 1936ac27a0ecSDave Kleikamp 1937617ba13bSMingming Cao cantfind_ext4: 1938ac27a0ecSDave Kleikamp if (!silent) 1939617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 1940ac27a0ecSDave Kleikamp sb->s_id); 1941ac27a0ecSDave Kleikamp goto failed_mount; 1942ac27a0ecSDave Kleikamp 1943ac27a0ecSDave Kleikamp failed_mount4: 1944dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 1945ac27a0ecSDave Kleikamp failed_mount3: 1946ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 1947ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1948ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 1949ac27a0ecSDave Kleikamp failed_mount2: 1950ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 1951ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 1952ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 1953ac27a0ecSDave Kleikamp failed_mount: 1954ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1955ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 1956ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 1957ac27a0ecSDave Kleikamp #endif 1958617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1959ac27a0ecSDave Kleikamp brelse(bh); 1960ac27a0ecSDave Kleikamp out_fail: 1961ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 1962ac27a0ecSDave Kleikamp kfree(sbi); 1963ac27a0ecSDave Kleikamp lock_kernel(); 1964ac27a0ecSDave Kleikamp return -EINVAL; 1965ac27a0ecSDave Kleikamp } 1966ac27a0ecSDave Kleikamp 1967ac27a0ecSDave Kleikamp /* 1968ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 1969ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 1970ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 1971ac27a0ecSDave Kleikamp */ 1972617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 1973ac27a0ecSDave Kleikamp { 1974617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1975ac27a0ecSDave Kleikamp 1976ac27a0ecSDave Kleikamp if (sbi->s_commit_interval) 1977ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 1978617ba13bSMingming Cao /* We could also set up an ext4-specific default for the commit 1979ac27a0ecSDave Kleikamp * interval here, but for now we'll just fall back to the jbd 1980ac27a0ecSDave Kleikamp * default. */ 1981ac27a0ecSDave Kleikamp 1982ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 1983ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 1984dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 1985ac27a0ecSDave Kleikamp else 1986dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 1987ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 1988ac27a0ecSDave Kleikamp } 1989ac27a0ecSDave Kleikamp 1990617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 1991ac27a0ecSDave Kleikamp unsigned int journal_inum) 1992ac27a0ecSDave Kleikamp { 1993ac27a0ecSDave Kleikamp struct inode *journal_inode; 1994ac27a0ecSDave Kleikamp journal_t *journal; 1995ac27a0ecSDave Kleikamp 1996ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 1997ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 1998ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 1999ac27a0ecSDave Kleikamp 2000ac27a0ecSDave Kleikamp journal_inode = iget(sb, journal_inum); 2001ac27a0ecSDave Kleikamp if (!journal_inode) { 2002617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 2003ac27a0ecSDave Kleikamp return NULL; 2004ac27a0ecSDave Kleikamp } 2005ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2006ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2007ac27a0ecSDave Kleikamp iput(journal_inode); 2008617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 2009ac27a0ecSDave Kleikamp return NULL; 2010ac27a0ecSDave Kleikamp } 2011ac27a0ecSDave Kleikamp 2012ac27a0ecSDave Kleikamp jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", 2013ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 2014ac27a0ecSDave Kleikamp if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) { 2015617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 2016ac27a0ecSDave Kleikamp iput(journal_inode); 2017ac27a0ecSDave Kleikamp return NULL; 2018ac27a0ecSDave Kleikamp } 2019ac27a0ecSDave Kleikamp 2020dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2021ac27a0ecSDave Kleikamp if (!journal) { 2022617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 2023ac27a0ecSDave Kleikamp iput(journal_inode); 2024ac27a0ecSDave Kleikamp return NULL; 2025ac27a0ecSDave Kleikamp } 2026ac27a0ecSDave Kleikamp journal->j_private = sb; 2027617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2028ac27a0ecSDave Kleikamp return journal; 2029ac27a0ecSDave Kleikamp } 2030ac27a0ecSDave Kleikamp 2031617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 2032ac27a0ecSDave Kleikamp dev_t j_dev) 2033ac27a0ecSDave Kleikamp { 2034ac27a0ecSDave Kleikamp struct buffer_head * bh; 2035ac27a0ecSDave Kleikamp journal_t *journal; 2036617ba13bSMingming Cao ext4_fsblk_t start; 2037617ba13bSMingming Cao ext4_fsblk_t len; 2038ac27a0ecSDave Kleikamp int hblock, blocksize; 2039617ba13bSMingming Cao ext4_fsblk_t sb_block; 2040ac27a0ecSDave Kleikamp unsigned long offset; 2041617ba13bSMingming Cao struct ext4_super_block * es; 2042ac27a0ecSDave Kleikamp struct block_device *bdev; 2043ac27a0ecSDave Kleikamp 2044617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 2045ac27a0ecSDave Kleikamp if (bdev == NULL) 2046ac27a0ecSDave Kleikamp return NULL; 2047ac27a0ecSDave Kleikamp 2048ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 2049ac27a0ecSDave Kleikamp printk(KERN_ERR 2050617ba13bSMingming Cao "EXT4: failed to claim external journal device.\n"); 2051ac27a0ecSDave Kleikamp blkdev_put(bdev); 2052ac27a0ecSDave Kleikamp return NULL; 2053ac27a0ecSDave Kleikamp } 2054ac27a0ecSDave Kleikamp 2055ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2056ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2057ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2058ac27a0ecSDave Kleikamp printk(KERN_ERR 2059617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2060ac27a0ecSDave Kleikamp goto out_bdev; 2061ac27a0ecSDave Kleikamp } 2062ac27a0ecSDave Kleikamp 2063617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2064617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2065ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2066ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2067617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2068ac27a0ecSDave Kleikamp "external journal\n"); 2069ac27a0ecSDave Kleikamp goto out_bdev; 2070ac27a0ecSDave Kleikamp } 2071ac27a0ecSDave Kleikamp 2072617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2073617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2074ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2075617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 2076617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 2077ac27a0ecSDave Kleikamp "bad superblock\n"); 2078ac27a0ecSDave Kleikamp brelse(bh); 2079ac27a0ecSDave Kleikamp goto out_bdev; 2080ac27a0ecSDave Kleikamp } 2081ac27a0ecSDave Kleikamp 2082617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 2083617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 2084ac27a0ecSDave Kleikamp brelse(bh); 2085ac27a0ecSDave Kleikamp goto out_bdev; 2086ac27a0ecSDave Kleikamp } 2087ac27a0ecSDave Kleikamp 2088bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 2089ac27a0ecSDave Kleikamp start = sb_block + 1; 2090ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 2091ac27a0ecSDave Kleikamp 2092dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 2093ac27a0ecSDave Kleikamp start, len, blocksize); 2094ac27a0ecSDave Kleikamp if (!journal) { 2095617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 2096ac27a0ecSDave Kleikamp goto out_bdev; 2097ac27a0ecSDave Kleikamp } 2098ac27a0ecSDave Kleikamp journal->j_private = sb; 2099ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 2100ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 2101ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 2102617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 2103ac27a0ecSDave Kleikamp goto out_journal; 2104ac27a0ecSDave Kleikamp } 2105ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 2106617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 2107ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 2108ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 2109ac27a0ecSDave Kleikamp goto out_journal; 2110ac27a0ecSDave Kleikamp } 2111617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 2112617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2113ac27a0ecSDave Kleikamp return journal; 2114ac27a0ecSDave Kleikamp out_journal: 2115dab291afSMingming Cao jbd2_journal_destroy(journal); 2116ac27a0ecSDave Kleikamp out_bdev: 2117617ba13bSMingming Cao ext4_blkdev_put(bdev); 2118ac27a0ecSDave Kleikamp return NULL; 2119ac27a0ecSDave Kleikamp } 2120ac27a0ecSDave Kleikamp 2121617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 2122617ba13bSMingming Cao struct ext4_super_block *es, 2123ac27a0ecSDave Kleikamp unsigned long journal_devnum) 2124ac27a0ecSDave Kleikamp { 2125ac27a0ecSDave Kleikamp journal_t *journal; 2126ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 2127ac27a0ecSDave Kleikamp dev_t journal_dev; 2128ac27a0ecSDave Kleikamp int err = 0; 2129ac27a0ecSDave Kleikamp int really_read_only; 2130ac27a0ecSDave Kleikamp 2131ac27a0ecSDave Kleikamp if (journal_devnum && 2132ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2133617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 2134ac27a0ecSDave Kleikamp "numbers have changed\n"); 2135ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 2136ac27a0ecSDave Kleikamp } else 2137ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 2138ac27a0ecSDave Kleikamp 2139ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 2140ac27a0ecSDave Kleikamp 2141ac27a0ecSDave Kleikamp /* 2142ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 2143ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 2144ac27a0ecSDave Kleikamp * can get read-write access to the device. 2145ac27a0ecSDave Kleikamp */ 2146ac27a0ecSDave Kleikamp 2147617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2148ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2149617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 2150ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 2151ac27a0ecSDave Kleikamp if (really_read_only) { 2152617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 2153ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 2154ac27a0ecSDave Kleikamp return -EROFS; 2155ac27a0ecSDave Kleikamp } 2156617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: write access will " 2157ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 2158ac27a0ecSDave Kleikamp } 2159ac27a0ecSDave Kleikamp } 2160ac27a0ecSDave Kleikamp 2161ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 2162617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 2163ac27a0ecSDave Kleikamp "and inode journals!\n"); 2164ac27a0ecSDave Kleikamp return -EINVAL; 2165ac27a0ecSDave Kleikamp } 2166ac27a0ecSDave Kleikamp 2167ac27a0ecSDave Kleikamp if (journal_inum) { 2168617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2169ac27a0ecSDave Kleikamp return -EINVAL; 2170ac27a0ecSDave Kleikamp } else { 2171617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 2172ac27a0ecSDave Kleikamp return -EINVAL; 2173ac27a0ecSDave Kleikamp } 2174ac27a0ecSDave Kleikamp 2175ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 2176dab291afSMingming Cao err = jbd2_journal_update_format(journal); 2177ac27a0ecSDave Kleikamp if (err) { 2178617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 2179dab291afSMingming Cao jbd2_journal_destroy(journal); 2180ac27a0ecSDave Kleikamp return err; 2181ac27a0ecSDave Kleikamp } 2182ac27a0ecSDave Kleikamp } 2183ac27a0ecSDave Kleikamp 2184617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 2185dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 2186ac27a0ecSDave Kleikamp if (!err) 2187dab291afSMingming Cao err = jbd2_journal_load(journal); 2188ac27a0ecSDave Kleikamp 2189ac27a0ecSDave Kleikamp if (err) { 2190617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 2191dab291afSMingming Cao jbd2_journal_destroy(journal); 2192ac27a0ecSDave Kleikamp return err; 2193ac27a0ecSDave Kleikamp } 2194ac27a0ecSDave Kleikamp 2195617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2196617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2197ac27a0ecSDave Kleikamp 2198ac27a0ecSDave Kleikamp if (journal_devnum && 2199ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2200ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 2201ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2202ac27a0ecSDave Kleikamp 2203ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2204617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2205ac27a0ecSDave Kleikamp } 2206ac27a0ecSDave Kleikamp 2207ac27a0ecSDave Kleikamp return 0; 2208ac27a0ecSDave Kleikamp } 2209ac27a0ecSDave Kleikamp 2210617ba13bSMingming Cao static int ext4_create_journal(struct super_block * sb, 2211617ba13bSMingming Cao struct ext4_super_block * es, 2212ac27a0ecSDave Kleikamp unsigned int journal_inum) 2213ac27a0ecSDave Kleikamp { 2214ac27a0ecSDave Kleikamp journal_t *journal; 22156c675bd4SBorislav Petkov int err; 2216ac27a0ecSDave Kleikamp 2217ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2218617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " 2219ac27a0ecSDave Kleikamp "create journal.\n"); 2220ac27a0ecSDave Kleikamp return -EROFS; 2221ac27a0ecSDave Kleikamp } 2222ac27a0ecSDave Kleikamp 22236c675bd4SBorislav Petkov journal = ext4_get_journal(sb, journal_inum); 22246c675bd4SBorislav Petkov if (!journal) 2225ac27a0ecSDave Kleikamp return -EINVAL; 2226ac27a0ecSDave Kleikamp 2227617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", 2228ac27a0ecSDave Kleikamp journal_inum); 2229ac27a0ecSDave Kleikamp 22306c675bd4SBorislav Petkov err = jbd2_journal_create(journal); 22316c675bd4SBorislav Petkov if (err) { 2232617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error creating journal.\n"); 2233dab291afSMingming Cao jbd2_journal_destroy(journal); 2234ac27a0ecSDave Kleikamp return -EIO; 2235ac27a0ecSDave Kleikamp } 2236ac27a0ecSDave Kleikamp 2237617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2238ac27a0ecSDave Kleikamp 2239617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 2240617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2241617ba13bSMingming Cao EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); 2242ac27a0ecSDave Kleikamp 2243ac27a0ecSDave Kleikamp es->s_journal_inum = cpu_to_le32(journal_inum); 2244ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2245ac27a0ecSDave Kleikamp 2246ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2247617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2248ac27a0ecSDave Kleikamp 2249ac27a0ecSDave Kleikamp return 0; 2250ac27a0ecSDave Kleikamp } 2251ac27a0ecSDave Kleikamp 2252617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 2253617ba13bSMingming Cao struct ext4_super_block * es, 2254ac27a0ecSDave Kleikamp int sync) 2255ac27a0ecSDave Kleikamp { 2256617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 2257ac27a0ecSDave Kleikamp 2258ac27a0ecSDave Kleikamp if (!sbh) 2259ac27a0ecSDave Kleikamp return; 2260ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 2261bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); 2262617ba13bSMingming Cao es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 2263ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 2264ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 2265ac27a0ecSDave Kleikamp if (sync) 2266ac27a0ecSDave Kleikamp sync_dirty_buffer(sbh); 2267ac27a0ecSDave Kleikamp } 2268ac27a0ecSDave Kleikamp 2269ac27a0ecSDave Kleikamp 2270ac27a0ecSDave Kleikamp /* 2271ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 2272ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 2273ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 2274ac27a0ecSDave Kleikamp */ 2275617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 2276617ba13bSMingming Cao struct ext4_super_block * es) 2277ac27a0ecSDave Kleikamp { 2278617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2279ac27a0ecSDave Kleikamp 2280dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2281dab291afSMingming Cao jbd2_journal_flush(journal); 228232c37730SJan Kara lock_super(sb); 2283617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 2284ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 2285617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2286ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2287617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2288ac27a0ecSDave Kleikamp } 228932c37730SJan Kara unlock_super(sb); 2290dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 2291ac27a0ecSDave Kleikamp } 2292ac27a0ecSDave Kleikamp 2293ac27a0ecSDave Kleikamp /* 2294ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 2295ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 2296ac27a0ecSDave Kleikamp * main filesystem now. 2297ac27a0ecSDave Kleikamp */ 2298617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 2299617ba13bSMingming Cao struct ext4_super_block * es) 2300ac27a0ecSDave Kleikamp { 2301ac27a0ecSDave Kleikamp journal_t *journal; 2302ac27a0ecSDave Kleikamp int j_errno; 2303ac27a0ecSDave Kleikamp const char *errstr; 2304ac27a0ecSDave Kleikamp 2305617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2306ac27a0ecSDave Kleikamp 2307ac27a0ecSDave Kleikamp /* 2308ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 2309617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 2310ac27a0ecSDave Kleikamp */ 2311ac27a0ecSDave Kleikamp 2312dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 2313ac27a0ecSDave Kleikamp if (j_errno) { 2314ac27a0ecSDave Kleikamp char nbuf[16]; 2315ac27a0ecSDave Kleikamp 2316617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 2317617ba13bSMingming Cao ext4_warning(sb, __FUNCTION__, "Filesystem error recorded " 2318ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 2319617ba13bSMingming Cao ext4_warning(sb, __FUNCTION__, "Marking fs in need of " 2320ac27a0ecSDave Kleikamp "filesystem check."); 2321ac27a0ecSDave Kleikamp 2322617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2323617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2324617ba13bSMingming Cao ext4_commit_super (sb, es, 1); 2325ac27a0ecSDave Kleikamp 2326dab291afSMingming Cao jbd2_journal_clear_err(journal); 2327ac27a0ecSDave Kleikamp } 2328ac27a0ecSDave Kleikamp } 2329ac27a0ecSDave Kleikamp 2330ac27a0ecSDave Kleikamp /* 2331ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 2332ac27a0ecSDave Kleikamp * and wait on the commit. 2333ac27a0ecSDave Kleikamp */ 2334617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 2335ac27a0ecSDave Kleikamp { 2336ac27a0ecSDave Kleikamp journal_t *journal; 2337ac27a0ecSDave Kleikamp int ret; 2338ac27a0ecSDave Kleikamp 2339ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 2340ac27a0ecSDave Kleikamp return 0; 2341ac27a0ecSDave Kleikamp 2342617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2343ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2344617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 2345ac27a0ecSDave Kleikamp return ret; 2346ac27a0ecSDave Kleikamp } 2347ac27a0ecSDave Kleikamp 2348ac27a0ecSDave Kleikamp /* 2349617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 2350ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 2351ac27a0ecSDave Kleikamp * point. Just start an async writeback to get the buffers on their way 2352ac27a0ecSDave Kleikamp * to the disk. 2353ac27a0ecSDave Kleikamp * 2354ac27a0ecSDave Kleikamp * This implicitly triggers the writebehind on sync(). 2355ac27a0ecSDave Kleikamp */ 2356ac27a0ecSDave Kleikamp 2357617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb) 2358ac27a0ecSDave Kleikamp { 2359ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 2360ac27a0ecSDave Kleikamp BUG(); 2361ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2362ac27a0ecSDave Kleikamp } 2363ac27a0ecSDave Kleikamp 2364617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 2365ac27a0ecSDave Kleikamp { 2366ac27a0ecSDave Kleikamp tid_t target; 2367ac27a0ecSDave Kleikamp 2368ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2369dab291afSMingming Cao if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { 2370ac27a0ecSDave Kleikamp if (wait) 2371dab291afSMingming Cao jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); 2372ac27a0ecSDave Kleikamp } 2373ac27a0ecSDave Kleikamp return 0; 2374ac27a0ecSDave Kleikamp } 2375ac27a0ecSDave Kleikamp 2376ac27a0ecSDave Kleikamp /* 2377ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 2378ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 2379ac27a0ecSDave Kleikamp */ 2380617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb) 2381ac27a0ecSDave Kleikamp { 2382ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2383ac27a0ecSDave Kleikamp 2384ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2385617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2386ac27a0ecSDave Kleikamp 2387ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 2388dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2389dab291afSMingming Cao jbd2_journal_flush(journal); 2390ac27a0ecSDave Kleikamp 2391ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 2392617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2393617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2394ac27a0ecSDave Kleikamp } 2395ac27a0ecSDave Kleikamp } 2396ac27a0ecSDave Kleikamp 2397ac27a0ecSDave Kleikamp /* 2398ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 2399ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 2400ac27a0ecSDave Kleikamp */ 2401617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb) 2402ac27a0ecSDave Kleikamp { 2403ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2404ac27a0ecSDave Kleikamp lock_super(sb); 2405ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 2406617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2407617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2408ac27a0ecSDave Kleikamp unlock_super(sb); 2409dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 2410ac27a0ecSDave Kleikamp } 2411ac27a0ecSDave Kleikamp } 2412ac27a0ecSDave Kleikamp 2413617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data) 2414ac27a0ecSDave Kleikamp { 2415617ba13bSMingming Cao struct ext4_super_block * es; 2416617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2417617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 2418ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 2419617ba13bSMingming Cao struct ext4_mount_options old_opts; 2420ac27a0ecSDave Kleikamp int err; 2421ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2422ac27a0ecSDave Kleikamp int i; 2423ac27a0ecSDave Kleikamp #endif 2424ac27a0ecSDave Kleikamp 2425ac27a0ecSDave Kleikamp /* Store the original options */ 2426ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 2427ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 2428ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 2429ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 2430ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 2431ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2432ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 2433ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2434ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 2435ac27a0ecSDave Kleikamp #endif 2436ac27a0ecSDave Kleikamp 2437ac27a0ecSDave Kleikamp /* 2438ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 2439ac27a0ecSDave Kleikamp */ 2440ac27a0ecSDave Kleikamp if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { 2441ac27a0ecSDave Kleikamp err = -EINVAL; 2442ac27a0ecSDave Kleikamp goto restore_opts; 2443ac27a0ecSDave Kleikamp } 2444ac27a0ecSDave Kleikamp 2445617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 2446617ba13bSMingming Cao ext4_abort(sb, __FUNCTION__, "Abort forced by user"); 2447ac27a0ecSDave Kleikamp 2448ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2449617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2450ac27a0ecSDave Kleikamp 2451ac27a0ecSDave Kleikamp es = sbi->s_es; 2452ac27a0ecSDave Kleikamp 2453617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 2454ac27a0ecSDave Kleikamp 2455ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 2456bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 2457617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 2458ac27a0ecSDave Kleikamp err = -EROFS; 2459ac27a0ecSDave Kleikamp goto restore_opts; 2460ac27a0ecSDave Kleikamp } 2461ac27a0ecSDave Kleikamp 2462ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 2463ac27a0ecSDave Kleikamp /* 2464ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 2465ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 2466ac27a0ecSDave Kleikamp */ 2467ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 2468ac27a0ecSDave Kleikamp 2469ac27a0ecSDave Kleikamp /* 2470ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 2471ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 2472ac27a0ecSDave Kleikamp * mark the partition as valid again. 2473ac27a0ecSDave Kleikamp */ 2474617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 2475617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 2476ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 2477ac27a0ecSDave Kleikamp 247832c37730SJan Kara /* 247932c37730SJan Kara * We have to unlock super so that we can wait for 248032c37730SJan Kara * transactions. 248132c37730SJan Kara */ 248232c37730SJan Kara unlock_super(sb); 2483617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 248432c37730SJan Kara lock_super(sb); 2485ac27a0ecSDave Kleikamp } else { 2486ac27a0ecSDave Kleikamp __le32 ret; 2487617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2488617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 2489617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2490ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 2491ac27a0ecSDave Kleikamp "optional features (%x).\n", 2492ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(ret)); 2493ac27a0ecSDave Kleikamp err = -EROFS; 2494ac27a0ecSDave Kleikamp goto restore_opts; 2495ac27a0ecSDave Kleikamp } 2496ead6596bSEric Sandeen 2497ead6596bSEric Sandeen /* 2498ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 2499ead6596bSEric Sandeen * around from a previously readonly bdev mount, 2500ead6596bSEric Sandeen * require a full umount/remount for now. 2501ead6596bSEric Sandeen */ 2502ead6596bSEric Sandeen if (es->s_last_orphan) { 2503ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2504ead6596bSEric Sandeen "remount RDWR because of unprocessed " 2505ead6596bSEric Sandeen "orphan inode list. Please " 2506ead6596bSEric Sandeen "umount/remount instead.\n", 2507ead6596bSEric Sandeen sb->s_id); 2508ead6596bSEric Sandeen err = -EINVAL; 2509ead6596bSEric Sandeen goto restore_opts; 2510ead6596bSEric Sandeen } 2511ead6596bSEric Sandeen 2512ac27a0ecSDave Kleikamp /* 2513ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 2514ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 2515ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 2516ac27a0ecSDave Kleikamp * the partition.) 2517ac27a0ecSDave Kleikamp */ 2518617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2519ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2520617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 2521ac27a0ecSDave Kleikamp goto restore_opts; 2522617ba13bSMingming Cao if (!ext4_setup_super (sb, es, 0)) 2523ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2524ac27a0ecSDave Kleikamp } 2525ac27a0ecSDave Kleikamp } 2526ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2527ac27a0ecSDave Kleikamp /* Release old quota file names */ 2528ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2529ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 2530ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 2531ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 2532ac27a0ecSDave Kleikamp #endif 2533ac27a0ecSDave Kleikamp return 0; 2534ac27a0ecSDave Kleikamp restore_opts: 2535ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 2536ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 2537ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 2538ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 2539ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 2540ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2541ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 2542ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2543ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 2544ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 2545ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2546ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 2547ac27a0ecSDave Kleikamp } 2548ac27a0ecSDave Kleikamp #endif 2549ac27a0ecSDave Kleikamp return err; 2550ac27a0ecSDave Kleikamp } 2551ac27a0ecSDave Kleikamp 2552617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) 2553ac27a0ecSDave Kleikamp { 2554ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 2555617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2556617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 2557960cc398SPekka Enberg u64 fsid; 2558ac27a0ecSDave Kleikamp 25595e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 25605e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 25615e70030dSBadari Pulavarty } else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) { 25625e70030dSBadari Pulavarty unsigned long ngroups = sbi->s_groups_count, i; 25635e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 2564ac27a0ecSDave Kleikamp smp_rmb(); 2565ac27a0ecSDave Kleikamp 2566ac27a0ecSDave Kleikamp /* 25675e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 25685e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 25695e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 2570ac27a0ecSDave Kleikamp */ 2571ac27a0ecSDave Kleikamp 2572ac27a0ecSDave Kleikamp /* 2573ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 2574ac27a0ecSDave Kleikamp * overhead 2575ac27a0ecSDave Kleikamp */ 2576ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 2577ac27a0ecSDave Kleikamp 2578ac27a0ecSDave Kleikamp /* 2579ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 2580ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 2581ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 2582ac27a0ecSDave Kleikamp */ 2583ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 2584617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 2585617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 2586ac27a0ecSDave Kleikamp cond_resched(); 2587ac27a0ecSDave Kleikamp } 2588ac27a0ecSDave Kleikamp 2589ac27a0ecSDave Kleikamp /* 2590ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 2591ac27a0ecSDave Kleikamp * bitmap, and an inode table. 2592ac27a0ecSDave Kleikamp */ 25935e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 25945e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 25955e70030dSBadari Pulavarty smp_wmb(); 25965e70030dSBadari Pulavarty sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count); 2597ac27a0ecSDave Kleikamp } 2598ac27a0ecSDave Kleikamp 2599617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 2600ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 26015e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 260252d9f3b4SPeter Zijlstra buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); 26035e70030dSBadari Pulavarty es->s_free_blocks_count = cpu_to_le32(buf->f_bfree); 2604bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 2605bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 2606ac27a0ecSDave Kleikamp buf->f_bavail = 0; 2607ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 260852d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 26095e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 2610617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 2611960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 2612960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 2613960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 2614960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 2615ac27a0ecSDave Kleikamp return 0; 2616ac27a0ecSDave Kleikamp } 2617ac27a0ecSDave Kleikamp 2618ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 2619ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 2620ac27a0ecSDave Kleikamp * Process 1 Process 2 2621617ba13bSMingming Cao * ext4_create() quota_sync() 2622dab291afSMingming Cao * jbd2_journal_start() write_dquot() 2623ac27a0ecSDave Kleikamp * DQUOT_INIT() down(dqio_mutex) 2624dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 2625ac27a0ecSDave Kleikamp * 2626ac27a0ecSDave Kleikamp */ 2627ac27a0ecSDave Kleikamp 2628ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2629ac27a0ecSDave Kleikamp 2630ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 2631ac27a0ecSDave Kleikamp { 2632ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 2633ac27a0ecSDave Kleikamp } 2634ac27a0ecSDave Kleikamp 2635617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type) 2636ac27a0ecSDave Kleikamp { 2637ac27a0ecSDave Kleikamp handle_t *handle; 2638ac27a0ecSDave Kleikamp int ret, err; 2639ac27a0ecSDave Kleikamp 2640ac27a0ecSDave Kleikamp /* We may create quota structure so we need to reserve enough blocks */ 2641617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); 2642ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2643ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2644ac27a0ecSDave Kleikamp ret = dquot_initialize(inode, type); 2645617ba13bSMingming Cao err = ext4_journal_stop(handle); 2646ac27a0ecSDave Kleikamp if (!ret) 2647ac27a0ecSDave Kleikamp ret = err; 2648ac27a0ecSDave Kleikamp return ret; 2649ac27a0ecSDave Kleikamp } 2650ac27a0ecSDave Kleikamp 2651617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode) 2652ac27a0ecSDave Kleikamp { 2653ac27a0ecSDave Kleikamp handle_t *handle; 2654ac27a0ecSDave Kleikamp int ret, err; 2655ac27a0ecSDave Kleikamp 2656ac27a0ecSDave Kleikamp /* We may delete quota structure so we need to reserve enough blocks */ 2657617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); 2658ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2659ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2660ac27a0ecSDave Kleikamp ret = dquot_drop(inode); 2661617ba13bSMingming Cao err = ext4_journal_stop(handle); 2662ac27a0ecSDave Kleikamp if (!ret) 2663ac27a0ecSDave Kleikamp ret = err; 2664ac27a0ecSDave Kleikamp return ret; 2665ac27a0ecSDave Kleikamp } 2666ac27a0ecSDave Kleikamp 2667617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 2668ac27a0ecSDave Kleikamp { 2669ac27a0ecSDave Kleikamp int ret, err; 2670ac27a0ecSDave Kleikamp handle_t *handle; 2671ac27a0ecSDave Kleikamp struct inode *inode; 2672ac27a0ecSDave Kleikamp 2673ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 2674617ba13bSMingming Cao handle = ext4_journal_start(inode, 2675617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 2676ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2677ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2678ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 2679617ba13bSMingming Cao err = ext4_journal_stop(handle); 2680ac27a0ecSDave Kleikamp if (!ret) 2681ac27a0ecSDave Kleikamp ret = err; 2682ac27a0ecSDave Kleikamp return ret; 2683ac27a0ecSDave Kleikamp } 2684ac27a0ecSDave Kleikamp 2685617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 2686ac27a0ecSDave Kleikamp { 2687ac27a0ecSDave Kleikamp int ret, err; 2688ac27a0ecSDave Kleikamp handle_t *handle; 2689ac27a0ecSDave Kleikamp 2690617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 2691617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 2692ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2693ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2694ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 2695617ba13bSMingming Cao err = ext4_journal_stop(handle); 2696ac27a0ecSDave Kleikamp if (!ret) 2697ac27a0ecSDave Kleikamp ret = err; 2698ac27a0ecSDave Kleikamp return ret; 2699ac27a0ecSDave Kleikamp } 2700ac27a0ecSDave Kleikamp 2701617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 2702ac27a0ecSDave Kleikamp { 2703ac27a0ecSDave Kleikamp int ret, err; 2704ac27a0ecSDave Kleikamp handle_t *handle; 2705ac27a0ecSDave Kleikamp 2706617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 2707617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 27089c3013e9SJan Kara if (IS_ERR(handle)) { 27099c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 27109c3013e9SJan Kara dquot_release(dquot); 2711ac27a0ecSDave Kleikamp return PTR_ERR(handle); 27129c3013e9SJan Kara } 2713ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 2714617ba13bSMingming Cao err = ext4_journal_stop(handle); 2715ac27a0ecSDave Kleikamp if (!ret) 2716ac27a0ecSDave Kleikamp ret = err; 2717ac27a0ecSDave Kleikamp return ret; 2718ac27a0ecSDave Kleikamp } 2719ac27a0ecSDave Kleikamp 2720617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 2721ac27a0ecSDave Kleikamp { 2722ac27a0ecSDave Kleikamp /* Are we journalling quotas? */ 2723617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 2724617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 2725ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 2726617ba13bSMingming Cao return ext4_write_dquot(dquot); 2727ac27a0ecSDave Kleikamp } else { 2728ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 2729ac27a0ecSDave Kleikamp } 2730ac27a0ecSDave Kleikamp } 2731ac27a0ecSDave Kleikamp 2732617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 2733ac27a0ecSDave Kleikamp { 2734ac27a0ecSDave Kleikamp int ret, err; 2735ac27a0ecSDave Kleikamp handle_t *handle; 2736ac27a0ecSDave Kleikamp 2737ac27a0ecSDave Kleikamp /* Data block + inode block */ 2738617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 2739ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2740ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2741ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 2742617ba13bSMingming Cao err = ext4_journal_stop(handle); 2743ac27a0ecSDave Kleikamp if (!ret) 2744ac27a0ecSDave Kleikamp ret = err; 2745ac27a0ecSDave Kleikamp return ret; 2746ac27a0ecSDave Kleikamp } 2747ac27a0ecSDave Kleikamp 2748ac27a0ecSDave Kleikamp /* 2749ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 2750ac27a0ecSDave Kleikamp * the quota file and such... 2751ac27a0ecSDave Kleikamp */ 2752617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 2753ac27a0ecSDave Kleikamp { 2754617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 2755617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 2756ac27a0ecSDave Kleikamp } 2757ac27a0ecSDave Kleikamp 2758ac27a0ecSDave Kleikamp /* 2759ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 2760ac27a0ecSDave Kleikamp */ 2761617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 2762ac27a0ecSDave Kleikamp char *path) 2763ac27a0ecSDave Kleikamp { 2764ac27a0ecSDave Kleikamp int err; 2765ac27a0ecSDave Kleikamp struct nameidata nd; 2766ac27a0ecSDave Kleikamp 2767ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 2768ac27a0ecSDave Kleikamp return -EINVAL; 2769ac27a0ecSDave Kleikamp /* Not journalling quota? */ 2770617ba13bSMingming Cao if (!EXT4_SB(sb)->s_qf_names[USRQUOTA] && 2771617ba13bSMingming Cao !EXT4_SB(sb)->s_qf_names[GRPQUOTA]) 2772ac27a0ecSDave Kleikamp return vfs_quota_on(sb, type, format_id, path); 2773ac27a0ecSDave Kleikamp err = path_lookup(path, LOOKUP_FOLLOW, &nd); 2774ac27a0ecSDave Kleikamp if (err) 2775ac27a0ecSDave Kleikamp return err; 2776ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 2777ac27a0ecSDave Kleikamp if (nd.mnt->mnt_sb != sb) { 2778ac27a0ecSDave Kleikamp path_release(&nd); 2779ac27a0ecSDave Kleikamp return -EXDEV; 2780ac27a0ecSDave Kleikamp } 2781ac27a0ecSDave Kleikamp /* Quotafile not of fs root? */ 2782ac27a0ecSDave Kleikamp if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) 2783ac27a0ecSDave Kleikamp printk(KERN_WARNING 2784617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 2785ac27a0ecSDave Kleikamp "Journalled quota will not work.\n"); 2786ac27a0ecSDave Kleikamp path_release(&nd); 2787ac27a0ecSDave Kleikamp return vfs_quota_on(sb, type, format_id, path); 2788ac27a0ecSDave Kleikamp } 2789ac27a0ecSDave Kleikamp 2790ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 2791ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 2792ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 2793ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 2794617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 2795ac27a0ecSDave Kleikamp size_t len, loff_t off) 2796ac27a0ecSDave Kleikamp { 2797ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 2798617ba13bSMingming Cao sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 2799ac27a0ecSDave Kleikamp int err = 0; 2800ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 2801ac27a0ecSDave Kleikamp int tocopy; 2802ac27a0ecSDave Kleikamp size_t toread; 2803ac27a0ecSDave Kleikamp struct buffer_head *bh; 2804ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 2805ac27a0ecSDave Kleikamp 2806ac27a0ecSDave Kleikamp if (off > i_size) 2807ac27a0ecSDave Kleikamp return 0; 2808ac27a0ecSDave Kleikamp if (off+len > i_size) 2809ac27a0ecSDave Kleikamp len = i_size-off; 2810ac27a0ecSDave Kleikamp toread = len; 2811ac27a0ecSDave Kleikamp while (toread > 0) { 2812ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 2813ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 2814617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 2815ac27a0ecSDave Kleikamp if (err) 2816ac27a0ecSDave Kleikamp return err; 2817ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 2818ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 2819ac27a0ecSDave Kleikamp else 2820ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 2821ac27a0ecSDave Kleikamp brelse(bh); 2822ac27a0ecSDave Kleikamp offset = 0; 2823ac27a0ecSDave Kleikamp toread -= tocopy; 2824ac27a0ecSDave Kleikamp data += tocopy; 2825ac27a0ecSDave Kleikamp blk++; 2826ac27a0ecSDave Kleikamp } 2827ac27a0ecSDave Kleikamp return len; 2828ac27a0ecSDave Kleikamp } 2829ac27a0ecSDave Kleikamp 2830ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 2831ac27a0ecSDave Kleikamp * enough credits) */ 2832617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 2833ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 2834ac27a0ecSDave Kleikamp { 2835ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 2836617ba13bSMingming Cao sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 2837ac27a0ecSDave Kleikamp int err = 0; 2838ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 2839ac27a0ecSDave Kleikamp int tocopy; 2840617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 2841ac27a0ecSDave Kleikamp size_t towrite = len; 2842ac27a0ecSDave Kleikamp struct buffer_head *bh; 2843ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 2844ac27a0ecSDave Kleikamp 28459c3013e9SJan Kara if (!handle) { 28469c3013e9SJan Kara printk(KERN_WARNING "EXT4-fs: Quota write (off=%Lu, len=%Lu)" 28479c3013e9SJan Kara " cancelled because transaction is not started.\n", 28489c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 28499c3013e9SJan Kara return -EIO; 28509c3013e9SJan Kara } 2851ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 2852ac27a0ecSDave Kleikamp while (towrite > 0) { 2853ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 2854ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 2855617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 2856ac27a0ecSDave Kleikamp if (!bh) 2857ac27a0ecSDave Kleikamp goto out; 2858ac27a0ecSDave Kleikamp if (journal_quota) { 2859617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 2860ac27a0ecSDave Kleikamp if (err) { 2861ac27a0ecSDave Kleikamp brelse(bh); 2862ac27a0ecSDave Kleikamp goto out; 2863ac27a0ecSDave Kleikamp } 2864ac27a0ecSDave Kleikamp } 2865ac27a0ecSDave Kleikamp lock_buffer(bh); 2866ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 2867ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 2868ac27a0ecSDave Kleikamp unlock_buffer(bh); 2869ac27a0ecSDave Kleikamp if (journal_quota) 2870617ba13bSMingming Cao err = ext4_journal_dirty_metadata(handle, bh); 2871ac27a0ecSDave Kleikamp else { 2872ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 2873617ba13bSMingming Cao err = ext4_journal_dirty_data(handle, bh); 2874ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 2875ac27a0ecSDave Kleikamp } 2876ac27a0ecSDave Kleikamp brelse(bh); 2877ac27a0ecSDave Kleikamp if (err) 2878ac27a0ecSDave Kleikamp goto out; 2879ac27a0ecSDave Kleikamp offset = 0; 2880ac27a0ecSDave Kleikamp towrite -= tocopy; 2881ac27a0ecSDave Kleikamp data += tocopy; 2882ac27a0ecSDave Kleikamp blk++; 2883ac27a0ecSDave Kleikamp } 2884ac27a0ecSDave Kleikamp out: 2885ac27a0ecSDave Kleikamp if (len == towrite) 2886ac27a0ecSDave Kleikamp return err; 2887ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 2888ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 2889617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 2890ac27a0ecSDave Kleikamp } 2891ac27a0ecSDave Kleikamp inode->i_version++; 2892ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 2893617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 2894ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 2895ac27a0ecSDave Kleikamp return len - towrite; 2896ac27a0ecSDave Kleikamp } 2897ac27a0ecSDave Kleikamp 2898ac27a0ecSDave Kleikamp #endif 2899ac27a0ecSDave Kleikamp 2900617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 2901ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 2902ac27a0ecSDave Kleikamp { 2903617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 2904ac27a0ecSDave Kleikamp } 2905ac27a0ecSDave Kleikamp 2906617ba13bSMingming Cao static struct file_system_type ext4dev_fs_type = { 2907ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 2908617ba13bSMingming Cao .name = "ext4dev", 2909617ba13bSMingming Cao .get_sb = ext4_get_sb, 2910ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 2911ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 2912ac27a0ecSDave Kleikamp }; 2913ac27a0ecSDave Kleikamp 2914617ba13bSMingming Cao static int __init init_ext4_fs(void) 2915ac27a0ecSDave Kleikamp { 2916617ba13bSMingming Cao int err = init_ext4_xattr(); 2917ac27a0ecSDave Kleikamp if (err) 2918ac27a0ecSDave Kleikamp return err; 2919ac27a0ecSDave Kleikamp err = init_inodecache(); 2920ac27a0ecSDave Kleikamp if (err) 2921ac27a0ecSDave Kleikamp goto out1; 2922617ba13bSMingming Cao err = register_filesystem(&ext4dev_fs_type); 2923ac27a0ecSDave Kleikamp if (err) 2924ac27a0ecSDave Kleikamp goto out; 2925ac27a0ecSDave Kleikamp return 0; 2926ac27a0ecSDave Kleikamp out: 2927ac27a0ecSDave Kleikamp destroy_inodecache(); 2928ac27a0ecSDave Kleikamp out1: 2929617ba13bSMingming Cao exit_ext4_xattr(); 2930ac27a0ecSDave Kleikamp return err; 2931ac27a0ecSDave Kleikamp } 2932ac27a0ecSDave Kleikamp 2933617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 2934ac27a0ecSDave Kleikamp { 2935617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 2936ac27a0ecSDave Kleikamp destroy_inodecache(); 2937617ba13bSMingming Cao exit_ext4_xattr(); 2938ac27a0ecSDave Kleikamp } 2939ac27a0ecSDave Kleikamp 2940ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 2941617ba13bSMingming Cao MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); 2942ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 2943617ba13bSMingming Cao module_init(init_ext4_fs) 2944617ba13bSMingming Cao module_exit(exit_ext4_fs) 2945