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> 32ac27a0ecSDave Kleikamp #include <linux/vfs.h> 33ac27a0ecSDave Kleikamp #include <linux/random.h> 34ac27a0ecSDave Kleikamp #include <linux/mount.h> 35ac27a0ecSDave Kleikamp #include <linux/namei.h> 36ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 37ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 38ac27a0ecSDave Kleikamp 39ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 40ac27a0ecSDave Kleikamp 41ac27a0ecSDave Kleikamp #include "xattr.h" 42ac27a0ecSDave Kleikamp #include "acl.h" 43ac27a0ecSDave Kleikamp #include "namei.h" 44ac27a0ecSDave Kleikamp 45617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 46ac27a0ecSDave Kleikamp unsigned long journal_devnum); 47617ba13bSMingming Cao static int ext4_create_journal(struct super_block *, struct ext4_super_block *, 48ac27a0ecSDave Kleikamp unsigned int); 49617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 50617ba13bSMingming Cao struct ext4_super_block * es, 51ac27a0ecSDave Kleikamp int sync); 52617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 53617ba13bSMingming Cao struct ext4_super_block * es); 54617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 55617ba13bSMingming Cao struct ext4_super_block * es); 56617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 57617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 58ac27a0ecSDave Kleikamp char nbuf[16]); 59617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data); 60617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf); 61617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb); 62617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb); 63617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb); 64ac27a0ecSDave Kleikamp 65bd81d8eeSLaurent Vivier 668fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 678fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 68bd81d8eeSLaurent Vivier { 69bd81d8eeSLaurent Vivier return le32_to_cpu(bg->bg_block_bitmap) | 708fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 718fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 72bd81d8eeSLaurent Vivier } 73bd81d8eeSLaurent Vivier 748fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 758fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 76bd81d8eeSLaurent Vivier { 77bd81d8eeSLaurent Vivier return le32_to_cpu(bg->bg_inode_bitmap) | 788fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 798fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 80bd81d8eeSLaurent Vivier } 81bd81d8eeSLaurent Vivier 828fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 838fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 84bd81d8eeSLaurent Vivier { 85bd81d8eeSLaurent Vivier return le32_to_cpu(bg->bg_inode_table) | 868fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 878fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 88bd81d8eeSLaurent Vivier } 89bd81d8eeSLaurent Vivier 908fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 918fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 92bd81d8eeSLaurent Vivier { 93bd81d8eeSLaurent Vivier bg->bg_block_bitmap = cpu_to_le32((u32)blk); 948fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 958fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 96bd81d8eeSLaurent Vivier } 97bd81d8eeSLaurent Vivier 988fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 998fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 100bd81d8eeSLaurent Vivier { 101bd81d8eeSLaurent Vivier bg->bg_inode_bitmap = cpu_to_le32((u32)blk); 1028fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1038fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 104bd81d8eeSLaurent Vivier } 105bd81d8eeSLaurent Vivier 1068fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1078fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 108bd81d8eeSLaurent Vivier { 109bd81d8eeSLaurent Vivier bg->bg_inode_table = cpu_to_le32((u32)blk); 1108fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1118fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 112bd81d8eeSLaurent Vivier } 113bd81d8eeSLaurent Vivier 114ac27a0ecSDave Kleikamp /* 115dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 116ac27a0ecSDave Kleikamp * 117ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 118ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 119ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 120ac27a0ecSDave Kleikamp * appropriate. 121ac27a0ecSDave Kleikamp */ 122617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 123ac27a0ecSDave Kleikamp { 124ac27a0ecSDave Kleikamp journal_t *journal; 125ac27a0ecSDave Kleikamp 126ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 127ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 128ac27a0ecSDave Kleikamp 129ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 130ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 131ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 132617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 133ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 134617ba13bSMingming Cao ext4_abort(sb, __FUNCTION__, 135ac27a0ecSDave Kleikamp "Detected aborted journal"); 136ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 137ac27a0ecSDave Kleikamp } 138ac27a0ecSDave Kleikamp 139dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 140ac27a0ecSDave Kleikamp } 141ac27a0ecSDave Kleikamp 142ac27a0ecSDave Kleikamp /* 143ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 144dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 145ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 146ac27a0ecSDave Kleikamp * appropriate. 147ac27a0ecSDave Kleikamp */ 148617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 149ac27a0ecSDave Kleikamp { 150ac27a0ecSDave Kleikamp struct super_block *sb; 151ac27a0ecSDave Kleikamp int err; 152ac27a0ecSDave Kleikamp int rc; 153ac27a0ecSDave Kleikamp 154ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 155ac27a0ecSDave Kleikamp err = handle->h_err; 156dab291afSMingming Cao rc = jbd2_journal_stop(handle); 157ac27a0ecSDave Kleikamp 158ac27a0ecSDave Kleikamp if (!err) 159ac27a0ecSDave Kleikamp err = rc; 160ac27a0ecSDave Kleikamp if (err) 161617ba13bSMingming Cao __ext4_std_error(sb, where, err); 162ac27a0ecSDave Kleikamp return err; 163ac27a0ecSDave Kleikamp } 164ac27a0ecSDave Kleikamp 165617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 166ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 167ac27a0ecSDave Kleikamp { 168ac27a0ecSDave Kleikamp char nbuf[16]; 169617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 170ac27a0ecSDave Kleikamp 171ac27a0ecSDave Kleikamp if (bh) 172ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 173ac27a0ecSDave Kleikamp 174ac27a0ecSDave Kleikamp if (!handle->h_err) 175ac27a0ecSDave Kleikamp handle->h_err = err; 176ac27a0ecSDave Kleikamp 177ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 178ac27a0ecSDave Kleikamp return; 179ac27a0ecSDave Kleikamp 180ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 181ac27a0ecSDave Kleikamp caller, errstr, err_fn); 182ac27a0ecSDave Kleikamp 183dab291afSMingming Cao jbd2_journal_abort_handle(handle); 184ac27a0ecSDave Kleikamp } 185ac27a0ecSDave Kleikamp 186ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 187ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 188ac27a0ecSDave Kleikamp * 189ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 190617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 191ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 192ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 193ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 194ac27a0ecSDave Kleikamp * write out the superblock safely. 195ac27a0ecSDave Kleikamp * 196dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 197ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 198ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 199ac27a0ecSDave Kleikamp */ 200ac27a0ecSDave Kleikamp 201617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 202ac27a0ecSDave Kleikamp { 203617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 204ac27a0ecSDave Kleikamp 205617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 206617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 207ac27a0ecSDave Kleikamp 208ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 209ac27a0ecSDave Kleikamp return; 210ac27a0ecSDave Kleikamp 211ac27a0ecSDave Kleikamp if (!test_opt (sb, ERRORS_CONT)) { 212617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 213ac27a0ecSDave Kleikamp 214617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 215ac27a0ecSDave Kleikamp if (journal) 216dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 217ac27a0ecSDave Kleikamp } 218ac27a0ecSDave Kleikamp if (test_opt (sb, ERRORS_RO)) { 219ac27a0ecSDave Kleikamp printk (KERN_CRIT "Remounting filesystem read-only\n"); 220ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 221ac27a0ecSDave Kleikamp } 222617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 223ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 224617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 225ac27a0ecSDave Kleikamp sb->s_id); 226ac27a0ecSDave Kleikamp } 227ac27a0ecSDave Kleikamp 228617ba13bSMingming Cao void ext4_error (struct super_block * sb, const char * function, 229ac27a0ecSDave Kleikamp const char * fmt, ...) 230ac27a0ecSDave Kleikamp { 231ac27a0ecSDave Kleikamp va_list args; 232ac27a0ecSDave Kleikamp 233ac27a0ecSDave Kleikamp va_start(args, fmt); 234617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 235ac27a0ecSDave Kleikamp vprintk(fmt, args); 236ac27a0ecSDave Kleikamp printk("\n"); 237ac27a0ecSDave Kleikamp va_end(args); 238ac27a0ecSDave Kleikamp 239617ba13bSMingming Cao ext4_handle_error(sb); 240ac27a0ecSDave Kleikamp } 241ac27a0ecSDave Kleikamp 242617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block * sb, int errno, 243ac27a0ecSDave Kleikamp char nbuf[16]) 244ac27a0ecSDave Kleikamp { 245ac27a0ecSDave Kleikamp char *errstr = NULL; 246ac27a0ecSDave Kleikamp 247ac27a0ecSDave Kleikamp switch (errno) { 248ac27a0ecSDave Kleikamp case -EIO: 249ac27a0ecSDave Kleikamp errstr = "IO failure"; 250ac27a0ecSDave Kleikamp break; 251ac27a0ecSDave Kleikamp case -ENOMEM: 252ac27a0ecSDave Kleikamp errstr = "Out of memory"; 253ac27a0ecSDave Kleikamp break; 254ac27a0ecSDave Kleikamp case -EROFS: 255dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 256ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 257ac27a0ecSDave Kleikamp else 258ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 259ac27a0ecSDave Kleikamp break; 260ac27a0ecSDave Kleikamp default: 261ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 262ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 263ac27a0ecSDave Kleikamp * NULL. */ 264ac27a0ecSDave Kleikamp if (nbuf) { 265ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 266ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 267ac27a0ecSDave Kleikamp errstr = nbuf; 268ac27a0ecSDave Kleikamp } 269ac27a0ecSDave Kleikamp break; 270ac27a0ecSDave Kleikamp } 271ac27a0ecSDave Kleikamp 272ac27a0ecSDave Kleikamp return errstr; 273ac27a0ecSDave Kleikamp } 274ac27a0ecSDave Kleikamp 275617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 276ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 277ac27a0ecSDave Kleikamp 278617ba13bSMingming Cao void __ext4_std_error (struct super_block * sb, const char * function, 279ac27a0ecSDave Kleikamp int errno) 280ac27a0ecSDave Kleikamp { 281ac27a0ecSDave Kleikamp char nbuf[16]; 282ac27a0ecSDave Kleikamp const char *errstr; 283ac27a0ecSDave Kleikamp 284ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 285ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 286ac27a0ecSDave Kleikamp * an error. */ 287ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 288ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 289ac27a0ecSDave Kleikamp return; 290ac27a0ecSDave Kleikamp 291617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 292617ba13bSMingming Cao printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 293ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 294ac27a0ecSDave Kleikamp 295617ba13bSMingming Cao ext4_handle_error(sb); 296ac27a0ecSDave Kleikamp } 297ac27a0ecSDave Kleikamp 298ac27a0ecSDave Kleikamp /* 299617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 300ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 301ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 302ac27a0ecSDave Kleikamp * 303ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 304ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 305ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 306ac27a0ecSDave Kleikamp */ 307ac27a0ecSDave Kleikamp 308617ba13bSMingming Cao void ext4_abort (struct super_block * sb, const char * function, 309ac27a0ecSDave Kleikamp const char * fmt, ...) 310ac27a0ecSDave Kleikamp { 311ac27a0ecSDave Kleikamp va_list args; 312ac27a0ecSDave Kleikamp 313617ba13bSMingming Cao printk (KERN_CRIT "ext4_abort called.\n"); 314ac27a0ecSDave Kleikamp 315ac27a0ecSDave Kleikamp va_start(args, fmt); 316617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); 317ac27a0ecSDave Kleikamp vprintk(fmt, args); 318ac27a0ecSDave Kleikamp printk("\n"); 319ac27a0ecSDave Kleikamp va_end(args); 320ac27a0ecSDave Kleikamp 321ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 322617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 323ac27a0ecSDave Kleikamp 324ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 325ac27a0ecSDave Kleikamp return; 326ac27a0ecSDave Kleikamp 327ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 328617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 329ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 330617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 331dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 332ac27a0ecSDave Kleikamp } 333ac27a0ecSDave Kleikamp 334617ba13bSMingming Cao void ext4_warning (struct super_block * sb, const char * function, 335ac27a0ecSDave Kleikamp const char * fmt, ...) 336ac27a0ecSDave Kleikamp { 337ac27a0ecSDave Kleikamp va_list args; 338ac27a0ecSDave Kleikamp 339ac27a0ecSDave Kleikamp va_start(args, fmt); 340617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 341ac27a0ecSDave Kleikamp sb->s_id, function); 342ac27a0ecSDave Kleikamp vprintk(fmt, args); 343ac27a0ecSDave Kleikamp printk("\n"); 344ac27a0ecSDave Kleikamp va_end(args); 345ac27a0ecSDave Kleikamp } 346ac27a0ecSDave Kleikamp 347617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 348ac27a0ecSDave Kleikamp { 349617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 350ac27a0ecSDave Kleikamp 351617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 352ac27a0ecSDave Kleikamp return; 353ac27a0ecSDave Kleikamp 354617ba13bSMingming Cao ext4_warning(sb, __FUNCTION__, 355ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 356ac27a0ecSDave Kleikamp "running e2fsck is recommended", 357617ba13bSMingming Cao EXT4_DYNAMIC_REV); 358ac27a0ecSDave Kleikamp 359617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 360617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 361617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 362ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 363ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 364ac27a0ecSDave Kleikamp 365ac27a0ecSDave Kleikamp /* 366ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 367ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 368ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 369ac27a0ecSDave Kleikamp */ 370ac27a0ecSDave Kleikamp } 371ac27a0ecSDave Kleikamp 372ac27a0ecSDave Kleikamp /* 373ac27a0ecSDave Kleikamp * Open the external journal device 374ac27a0ecSDave Kleikamp */ 375617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 376ac27a0ecSDave Kleikamp { 377ac27a0ecSDave Kleikamp struct block_device *bdev; 378ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 379ac27a0ecSDave Kleikamp 380ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 381ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 382ac27a0ecSDave Kleikamp goto fail; 383ac27a0ecSDave Kleikamp return bdev; 384ac27a0ecSDave Kleikamp 385ac27a0ecSDave Kleikamp fail: 386617ba13bSMingming Cao printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", 387ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 388ac27a0ecSDave Kleikamp return NULL; 389ac27a0ecSDave Kleikamp } 390ac27a0ecSDave Kleikamp 391ac27a0ecSDave Kleikamp /* 392ac27a0ecSDave Kleikamp * Release the journal device 393ac27a0ecSDave Kleikamp */ 394617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 395ac27a0ecSDave Kleikamp { 396ac27a0ecSDave Kleikamp bd_release(bdev); 397ac27a0ecSDave Kleikamp return blkdev_put(bdev); 398ac27a0ecSDave Kleikamp } 399ac27a0ecSDave Kleikamp 400617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 401ac27a0ecSDave Kleikamp { 402ac27a0ecSDave Kleikamp struct block_device *bdev; 403ac27a0ecSDave Kleikamp int ret = -ENODEV; 404ac27a0ecSDave Kleikamp 405ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 406ac27a0ecSDave Kleikamp if (bdev) { 407617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 408ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 409ac27a0ecSDave Kleikamp } 410ac27a0ecSDave Kleikamp return ret; 411ac27a0ecSDave Kleikamp } 412ac27a0ecSDave Kleikamp 413ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 414ac27a0ecSDave Kleikamp { 415617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 416ac27a0ecSDave Kleikamp } 417ac27a0ecSDave Kleikamp 418617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 419ac27a0ecSDave Kleikamp { 420ac27a0ecSDave Kleikamp struct list_head *l; 421ac27a0ecSDave Kleikamp 422ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 423ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 424ac27a0ecSDave Kleikamp 425ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 426ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 427ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 428ac27a0ecSDave Kleikamp printk(KERN_ERR " " 429ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 430ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 431ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 432ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 433ac27a0ecSDave Kleikamp } 434ac27a0ecSDave Kleikamp } 435ac27a0ecSDave Kleikamp 436617ba13bSMingming Cao static void ext4_put_super (struct super_block * sb) 437ac27a0ecSDave Kleikamp { 438617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 439617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 440ac27a0ecSDave Kleikamp int i; 441ac27a0ecSDave Kleikamp 442a86c6181SAlex Tomas ext4_ext_release(sb); 443617ba13bSMingming Cao ext4_xattr_put_super(sb); 444dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 445ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 446617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 447ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 448ac27a0ecSDave Kleikamp BUFFER_TRACE(sbi->s_sbh, "marking dirty"); 449ac27a0ecSDave Kleikamp mark_buffer_dirty(sbi->s_sbh); 450617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 451ac27a0ecSDave Kleikamp } 452ac27a0ecSDave Kleikamp 453ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 454ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 455ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 456ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 457ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 458ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 459ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 460ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 461ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 462ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 463ac27a0ecSDave Kleikamp #endif 464ac27a0ecSDave Kleikamp 465ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 466ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 467ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 468ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 469ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 470ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 471ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 472ac27a0ecSDave Kleikamp 473f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 474ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 475ac27a0ecSDave Kleikamp /* 476ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 477ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 478ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 479ac27a0ecSDave Kleikamp */ 480ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 481f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 482617ba13bSMingming Cao ext4_blkdev_remove(sbi); 483ac27a0ecSDave Kleikamp } 484ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 485ac27a0ecSDave Kleikamp kfree(sbi); 486ac27a0ecSDave Kleikamp return; 487ac27a0ecSDave Kleikamp } 488ac27a0ecSDave Kleikamp 489e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 490ac27a0ecSDave Kleikamp 491ac27a0ecSDave Kleikamp /* 492ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 493ac27a0ecSDave Kleikamp */ 494617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 495ac27a0ecSDave Kleikamp { 496617ba13bSMingming Cao struct ext4_inode_info *ei; 497ac27a0ecSDave Kleikamp 498e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 499ac27a0ecSDave Kleikamp if (!ei) 500ac27a0ecSDave Kleikamp return NULL; 501617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 502617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 503617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 504ac27a0ecSDave Kleikamp #endif 505ac27a0ecSDave Kleikamp ei->i_block_alloc_info = NULL; 506ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 507a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 508ac27a0ecSDave Kleikamp return &ei->vfs_inode; 509ac27a0ecSDave Kleikamp } 510ac27a0ecSDave Kleikamp 511617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 512ac27a0ecSDave Kleikamp { 513*9f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 514*9f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 515*9f7dd93dSVasily Averin EXT4_I(inode)); 516*9f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 517*9f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 518*9f7dd93dSVasily Averin true); 519*9f7dd93dSVasily Averin dump_stack(); 520*9f7dd93dSVasily Averin } 521617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 522ac27a0ecSDave Kleikamp } 523ac27a0ecSDave Kleikamp 524e18b890bSChristoph Lameter static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) 525ac27a0ecSDave Kleikamp { 526617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 527ac27a0ecSDave Kleikamp 528ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 529617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 530ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 531ac27a0ecSDave Kleikamp #endif 532ac27a0ecSDave Kleikamp mutex_init(&ei->truncate_mutex); 533ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 534ac27a0ecSDave Kleikamp } 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp static int init_inodecache(void) 537ac27a0ecSDave Kleikamp { 538617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 539617ba13bSMingming Cao sizeof(struct ext4_inode_info), 540ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 541ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 542ac27a0ecSDave Kleikamp init_once, NULL); 543617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 544ac27a0ecSDave Kleikamp return -ENOMEM; 545ac27a0ecSDave Kleikamp return 0; 546ac27a0ecSDave Kleikamp } 547ac27a0ecSDave Kleikamp 548ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 549ac27a0ecSDave Kleikamp { 550617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 551ac27a0ecSDave Kleikamp } 552ac27a0ecSDave Kleikamp 553617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 554ac27a0ecSDave Kleikamp { 555617ba13bSMingming Cao struct ext4_block_alloc_info *rsv = EXT4_I(inode)->i_block_alloc_info; 556617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 557617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 558617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 559617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 560617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 561ac27a0ecSDave Kleikamp } 562617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 563617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 564617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 565617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 566ac27a0ecSDave Kleikamp } 567ac27a0ecSDave Kleikamp #endif 568617ba13bSMingming Cao ext4_discard_reservation(inode); 569617ba13bSMingming Cao EXT4_I(inode)->i_block_alloc_info = NULL; 570ac27a0ecSDave Kleikamp if (unlikely(rsv)) 571ac27a0ecSDave Kleikamp kfree(rsv); 572ac27a0ecSDave Kleikamp } 573ac27a0ecSDave Kleikamp 574617ba13bSMingming Cao static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb) 575ac27a0ecSDave Kleikamp { 576ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 577617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 578ac27a0ecSDave Kleikamp 579ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 580ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 581ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); 582ac27a0ecSDave Kleikamp 583ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 584ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 585ac27a0ecSDave Kleikamp 586ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 587ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 588ac27a0ecSDave Kleikamp 589617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 590ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 591ac27a0ecSDave Kleikamp 592617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 593ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 594ac27a0ecSDave Kleikamp #endif 595ac27a0ecSDave Kleikamp } 596ac27a0ecSDave Kleikamp 597617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 598ac27a0ecSDave Kleikamp { 599ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 600ac27a0ecSDave Kleikamp 601617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 602ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 603617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 604ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 605617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 606ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 607ac27a0ecSDave Kleikamp 608617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 609ac27a0ecSDave Kleikamp 610ac27a0ecSDave Kleikamp return 0; 611ac27a0ecSDave Kleikamp } 612ac27a0ecSDave Kleikamp 613ac27a0ecSDave Kleikamp 614617ba13bSMingming Cao static struct dentry *ext4_get_dentry(struct super_block *sb, void *vobjp) 615ac27a0ecSDave Kleikamp { 616ac27a0ecSDave Kleikamp __u32 *objp = vobjp; 617ac27a0ecSDave Kleikamp unsigned long ino = objp[0]; 618ac27a0ecSDave Kleikamp __u32 generation = objp[1]; 619ac27a0ecSDave Kleikamp struct inode *inode; 620ac27a0ecSDave Kleikamp struct dentry *result; 621ac27a0ecSDave Kleikamp 622617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 623ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 624617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 625ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 626ac27a0ecSDave Kleikamp 627ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 628ac27a0ecSDave Kleikamp * 629617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 630ac27a0ecSDave Kleikamp * deleted, so we should be safe. 631ac27a0ecSDave Kleikamp * 632ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 633ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 634ac27a0ecSDave Kleikamp */ 635ac27a0ecSDave Kleikamp inode = iget(sb, ino); 636ac27a0ecSDave Kleikamp if (inode == NULL) 637ac27a0ecSDave Kleikamp return ERR_PTR(-ENOMEM); 638ac27a0ecSDave Kleikamp if (is_bad_inode(inode) || 639ac27a0ecSDave Kleikamp (generation && inode->i_generation != generation)) { 640ac27a0ecSDave Kleikamp iput(inode); 641ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 642ac27a0ecSDave Kleikamp } 643ac27a0ecSDave Kleikamp /* now to find a dentry. 644ac27a0ecSDave Kleikamp * If possible, get a well-connected one 645ac27a0ecSDave Kleikamp */ 646ac27a0ecSDave Kleikamp result = d_alloc_anon(inode); 647ac27a0ecSDave Kleikamp if (!result) { 648ac27a0ecSDave Kleikamp iput(inode); 649ac27a0ecSDave Kleikamp return ERR_PTR(-ENOMEM); 650ac27a0ecSDave Kleikamp } 651ac27a0ecSDave Kleikamp return result; 652ac27a0ecSDave Kleikamp } 653ac27a0ecSDave Kleikamp 654ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 655ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") 656ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 657ac27a0ecSDave Kleikamp 658617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type); 659617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode); 660617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 661617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 662617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 663617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 664617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 665617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, char *path); 666617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 667617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 668ac27a0ecSDave Kleikamp size_t len, loff_t off); 669617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 670ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 671ac27a0ecSDave Kleikamp 672617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 673617ba13bSMingming Cao .initialize = ext4_dquot_initialize, 674617ba13bSMingming Cao .drop = ext4_dquot_drop, 675ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 676ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 677ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 678ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 679ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 680617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 681617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 682617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 683617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 684617ba13bSMingming Cao .write_info = ext4_write_info 685ac27a0ecSDave Kleikamp }; 686ac27a0ecSDave Kleikamp 687617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 688617ba13bSMingming Cao .quota_on = ext4_quota_on, 689ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 690ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 691ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 692ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 693ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 694ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 695ac27a0ecSDave Kleikamp }; 696ac27a0ecSDave Kleikamp #endif 697ac27a0ecSDave Kleikamp 698ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 699617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 700617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 701617ba13bSMingming Cao .read_inode = ext4_read_inode, 702617ba13bSMingming Cao .write_inode = ext4_write_inode, 703617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 704617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 705617ba13bSMingming Cao .put_super = ext4_put_super, 706617ba13bSMingming Cao .write_super = ext4_write_super, 707617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 708617ba13bSMingming Cao .write_super_lockfs = ext4_write_super_lockfs, 709617ba13bSMingming Cao .unlockfs = ext4_unlockfs, 710617ba13bSMingming Cao .statfs = ext4_statfs, 711617ba13bSMingming Cao .remount_fs = ext4_remount, 712617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 713617ba13bSMingming Cao .show_options = ext4_show_options, 714ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 715617ba13bSMingming Cao .quota_read = ext4_quota_read, 716617ba13bSMingming Cao .quota_write = ext4_quota_write, 717ac27a0ecSDave Kleikamp #endif 718ac27a0ecSDave Kleikamp }; 719ac27a0ecSDave Kleikamp 720617ba13bSMingming Cao static struct export_operations ext4_export_ops = { 721617ba13bSMingming Cao .get_parent = ext4_get_parent, 722617ba13bSMingming Cao .get_dentry = ext4_get_dentry, 723ac27a0ecSDave Kleikamp }; 724ac27a0ecSDave Kleikamp 725ac27a0ecSDave Kleikamp enum { 726ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 727ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 728ac27a0ecSDave Kleikamp Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, 729ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 730ac27a0ecSDave Kleikamp Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 731ac27a0ecSDave Kleikamp Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, 732ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 733ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 734ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 735ac27a0ecSDave Kleikamp Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 736a86c6181SAlex Tomas Opt_grpquota, Opt_extents, 737ac27a0ecSDave Kleikamp }; 738ac27a0ecSDave Kleikamp 739ac27a0ecSDave Kleikamp static match_table_t tokens = { 740ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 741ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 742ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 743ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 744ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 745ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 746ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 747ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 748ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 749ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 750ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 751ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 752ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 753ac27a0ecSDave Kleikamp {Opt_nocheck, "nocheck"}, 754ac27a0ecSDave Kleikamp {Opt_nocheck, "check=none"}, 755ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 756ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 757ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 758ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 759ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 760ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 761ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 762ac27a0ecSDave Kleikamp {Opt_reservation, "reservation"}, 763ac27a0ecSDave Kleikamp {Opt_noreservation, "noreservation"}, 764ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 765ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 766ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 767ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 768ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 769ac27a0ecSDave Kleikamp {Opt_journal_inum, "journal=%u"}, 770ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 771ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 772ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 773ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 774ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 775ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 776ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 777ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 778ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 779ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 780ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 781ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 782ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 783ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 784ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 785ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 786a86c6181SAlex Tomas {Opt_extents, "extents"}, 787ac27a0ecSDave Kleikamp {Opt_err, NULL}, 788ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 789ac27a0ecSDave Kleikamp }; 790ac27a0ecSDave Kleikamp 791617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 792ac27a0ecSDave Kleikamp { 793617ba13bSMingming Cao ext4_fsblk_t sb_block; 794ac27a0ecSDave Kleikamp char *options = (char *) *data; 795ac27a0ecSDave Kleikamp 796ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 797ac27a0ecSDave Kleikamp return 1; /* Default location */ 798ac27a0ecSDave Kleikamp options += 3; 799617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 800ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 801ac27a0ecSDave Kleikamp if (*options && *options != ',') { 802617ba13bSMingming Cao printk("EXT4-fs: Invalid sb specification: %s\n", 803ac27a0ecSDave Kleikamp (char *) *data); 804ac27a0ecSDave Kleikamp return 1; 805ac27a0ecSDave Kleikamp } 806ac27a0ecSDave Kleikamp if (*options == ',') 807ac27a0ecSDave Kleikamp options++; 808ac27a0ecSDave Kleikamp *data = (void *) options; 809ac27a0ecSDave Kleikamp return sb_block; 810ac27a0ecSDave Kleikamp } 811ac27a0ecSDave Kleikamp 812ac27a0ecSDave Kleikamp static int parse_options (char *options, struct super_block *sb, 813ac27a0ecSDave Kleikamp unsigned int *inum, unsigned long *journal_devnum, 814617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 815ac27a0ecSDave Kleikamp { 816617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 817ac27a0ecSDave Kleikamp char * p; 818ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 819ac27a0ecSDave Kleikamp int data_opt = 0; 820ac27a0ecSDave Kleikamp int option; 821ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 822ac27a0ecSDave Kleikamp int qtype; 823ac27a0ecSDave Kleikamp char *qname; 824ac27a0ecSDave Kleikamp #endif 825ac27a0ecSDave Kleikamp 826ac27a0ecSDave Kleikamp if (!options) 827ac27a0ecSDave Kleikamp return 1; 828ac27a0ecSDave Kleikamp 829ac27a0ecSDave Kleikamp while ((p = strsep (&options, ",")) != NULL) { 830ac27a0ecSDave Kleikamp int token; 831ac27a0ecSDave Kleikamp if (!*p) 832ac27a0ecSDave Kleikamp continue; 833ac27a0ecSDave Kleikamp 834ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 835ac27a0ecSDave Kleikamp switch (token) { 836ac27a0ecSDave Kleikamp case Opt_bsd_df: 837ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, MINIX_DF); 838ac27a0ecSDave Kleikamp break; 839ac27a0ecSDave Kleikamp case Opt_minix_df: 840ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, MINIX_DF); 841ac27a0ecSDave Kleikamp break; 842ac27a0ecSDave Kleikamp case Opt_grpid: 843ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, GRPID); 844ac27a0ecSDave Kleikamp break; 845ac27a0ecSDave Kleikamp case Opt_nogrpid: 846ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, GRPID); 847ac27a0ecSDave Kleikamp break; 848ac27a0ecSDave Kleikamp case Opt_resuid: 849ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 850ac27a0ecSDave Kleikamp return 0; 851ac27a0ecSDave Kleikamp sbi->s_resuid = option; 852ac27a0ecSDave Kleikamp break; 853ac27a0ecSDave Kleikamp case Opt_resgid: 854ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 855ac27a0ecSDave Kleikamp return 0; 856ac27a0ecSDave Kleikamp sbi->s_resgid = option; 857ac27a0ecSDave Kleikamp break; 858ac27a0ecSDave Kleikamp case Opt_sb: 859ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 860ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 861ac27a0ecSDave Kleikamp break; 862ac27a0ecSDave Kleikamp case Opt_err_panic: 863ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 864ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 865ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_PANIC); 866ac27a0ecSDave Kleikamp break; 867ac27a0ecSDave Kleikamp case Opt_err_ro: 868ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_CONT); 869ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 870ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_RO); 871ac27a0ecSDave Kleikamp break; 872ac27a0ecSDave Kleikamp case Opt_err_cont: 873ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_RO); 874ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, ERRORS_PANIC); 875ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, ERRORS_CONT); 876ac27a0ecSDave Kleikamp break; 877ac27a0ecSDave Kleikamp case Opt_nouid32: 878ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NO_UID32); 879ac27a0ecSDave Kleikamp break; 880ac27a0ecSDave Kleikamp case Opt_nocheck: 881ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, CHECK); 882ac27a0ecSDave Kleikamp break; 883ac27a0ecSDave Kleikamp case Opt_debug: 884ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, DEBUG); 885ac27a0ecSDave Kleikamp break; 886ac27a0ecSDave Kleikamp case Opt_oldalloc: 887ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, OLDALLOC); 888ac27a0ecSDave Kleikamp break; 889ac27a0ecSDave Kleikamp case Opt_orlov: 890ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, OLDALLOC); 891ac27a0ecSDave Kleikamp break; 892617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_XATTR 893ac27a0ecSDave Kleikamp case Opt_user_xattr: 894ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, XATTR_USER); 895ac27a0ecSDave Kleikamp break; 896ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 897ac27a0ecSDave Kleikamp clear_opt (sbi->s_mount_opt, XATTR_USER); 898ac27a0ecSDave Kleikamp break; 899ac27a0ecSDave Kleikamp #else 900ac27a0ecSDave Kleikamp case Opt_user_xattr: 901ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 902617ba13bSMingming Cao printk("EXT4 (no)user_xattr options not supported\n"); 903ac27a0ecSDave Kleikamp break; 904ac27a0ecSDave Kleikamp #endif 905617ba13bSMingming Cao #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 906ac27a0ecSDave Kleikamp case Opt_acl: 907ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 908ac27a0ecSDave Kleikamp break; 909ac27a0ecSDave Kleikamp case Opt_noacl: 910ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 911ac27a0ecSDave Kleikamp break; 912ac27a0ecSDave Kleikamp #else 913ac27a0ecSDave Kleikamp case Opt_acl: 914ac27a0ecSDave Kleikamp case Opt_noacl: 915617ba13bSMingming Cao printk("EXT4 (no)acl options not supported\n"); 916ac27a0ecSDave Kleikamp break; 917ac27a0ecSDave Kleikamp #endif 918ac27a0ecSDave Kleikamp case Opt_reservation: 919ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 920ac27a0ecSDave Kleikamp break; 921ac27a0ecSDave Kleikamp case Opt_noreservation: 922ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, RESERVATION); 923ac27a0ecSDave Kleikamp break; 924ac27a0ecSDave Kleikamp case Opt_journal_update: 925ac27a0ecSDave Kleikamp /* @@@ FIXME */ 926ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 927ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 928ac27a0ecSDave Kleikamp user to specify an existing inode to be the 929ac27a0ecSDave Kleikamp journal file. */ 930ac27a0ecSDave Kleikamp if (is_remount) { 931617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 932ac27a0ecSDave Kleikamp "journal on remount\n"); 933ac27a0ecSDave Kleikamp return 0; 934ac27a0ecSDave Kleikamp } 935ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); 936ac27a0ecSDave Kleikamp break; 937ac27a0ecSDave Kleikamp case Opt_journal_inum: 938ac27a0ecSDave Kleikamp if (is_remount) { 939617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 940ac27a0ecSDave Kleikamp "journal on remount\n"); 941ac27a0ecSDave Kleikamp return 0; 942ac27a0ecSDave Kleikamp } 943ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 944ac27a0ecSDave Kleikamp return 0; 945ac27a0ecSDave Kleikamp *inum = option; 946ac27a0ecSDave Kleikamp break; 947ac27a0ecSDave Kleikamp case Opt_journal_dev: 948ac27a0ecSDave Kleikamp if (is_remount) { 949617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 950ac27a0ecSDave Kleikamp "journal on remount\n"); 951ac27a0ecSDave Kleikamp return 0; 952ac27a0ecSDave Kleikamp } 953ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 954ac27a0ecSDave Kleikamp return 0; 955ac27a0ecSDave Kleikamp *journal_devnum = option; 956ac27a0ecSDave Kleikamp break; 957ac27a0ecSDave Kleikamp case Opt_noload: 958ac27a0ecSDave Kleikamp set_opt (sbi->s_mount_opt, NOLOAD); 959ac27a0ecSDave Kleikamp break; 960ac27a0ecSDave Kleikamp case Opt_commit: 961ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 962ac27a0ecSDave Kleikamp return 0; 963ac27a0ecSDave Kleikamp if (option < 0) 964ac27a0ecSDave Kleikamp return 0; 965ac27a0ecSDave Kleikamp if (option == 0) 966ac27a0ecSDave Kleikamp option = JBD_DEFAULT_MAX_COMMIT_AGE; 967ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 968ac27a0ecSDave Kleikamp break; 969ac27a0ecSDave Kleikamp case Opt_data_journal: 970617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 971ac27a0ecSDave Kleikamp goto datacheck; 972ac27a0ecSDave Kleikamp case Opt_data_ordered: 973617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 974ac27a0ecSDave Kleikamp goto datacheck; 975ac27a0ecSDave Kleikamp case Opt_data_writeback: 976617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 977ac27a0ecSDave Kleikamp datacheck: 978ac27a0ecSDave Kleikamp if (is_remount) { 979617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 980ac27a0ecSDave Kleikamp != data_opt) { 981ac27a0ecSDave Kleikamp printk(KERN_ERR 982617ba13bSMingming Cao "EXT4-fs: cannot change data " 983ac27a0ecSDave Kleikamp "mode on remount\n"); 984ac27a0ecSDave Kleikamp return 0; 985ac27a0ecSDave Kleikamp } 986ac27a0ecSDave Kleikamp } else { 987617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 988ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 989ac27a0ecSDave Kleikamp } 990ac27a0ecSDave Kleikamp break; 991ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 992ac27a0ecSDave Kleikamp case Opt_usrjquota: 993ac27a0ecSDave Kleikamp qtype = USRQUOTA; 994ac27a0ecSDave Kleikamp goto set_qf_name; 995ac27a0ecSDave Kleikamp case Opt_grpjquota: 996ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 997ac27a0ecSDave Kleikamp set_qf_name: 998ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 999ac27a0ecSDave Kleikamp printk(KERN_ERR 1000617ba13bSMingming Cao "EXT4-fs: Cannot change journalled " 1001ac27a0ecSDave Kleikamp "quota options when quota turned on.\n"); 1002ac27a0ecSDave Kleikamp return 0; 1003ac27a0ecSDave Kleikamp } 1004ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1005ac27a0ecSDave Kleikamp if (!qname) { 1006ac27a0ecSDave Kleikamp printk(KERN_ERR 1007617ba13bSMingming Cao "EXT4-fs: not enough memory for " 1008ac27a0ecSDave Kleikamp "storing quotafile name.\n"); 1009ac27a0ecSDave Kleikamp return 0; 1010ac27a0ecSDave Kleikamp } 1011ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1012ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1013ac27a0ecSDave Kleikamp printk(KERN_ERR 1014617ba13bSMingming Cao "EXT4-fs: %s quota file already " 1015ac27a0ecSDave Kleikamp "specified.\n", QTYPE2NAME(qtype)); 1016ac27a0ecSDave Kleikamp kfree(qname); 1017ac27a0ecSDave Kleikamp return 0; 1018ac27a0ecSDave Kleikamp } 1019ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1020ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1021ac27a0ecSDave Kleikamp printk(KERN_ERR 1022617ba13bSMingming Cao "EXT4-fs: quotafile must be on " 1023ac27a0ecSDave Kleikamp "filesystem root.\n"); 1024ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1025ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1026ac27a0ecSDave Kleikamp return 0; 1027ac27a0ecSDave Kleikamp } 1028ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1029ac27a0ecSDave Kleikamp break; 1030ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1031ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1032ac27a0ecSDave Kleikamp goto clear_qf_name; 1033ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1034ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1035ac27a0ecSDave Kleikamp clear_qf_name: 1036ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1037617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 1038ac27a0ecSDave Kleikamp "journalled quota options when " 1039ac27a0ecSDave Kleikamp "quota turned on.\n"); 1040ac27a0ecSDave Kleikamp return 0; 1041ac27a0ecSDave Kleikamp } 1042ac27a0ecSDave Kleikamp /* 1043ac27a0ecSDave Kleikamp * The space will be released later when all options 1044ac27a0ecSDave Kleikamp * are confirmed to be correct 1045ac27a0ecSDave Kleikamp */ 1046ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1047ac27a0ecSDave Kleikamp break; 1048ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1049ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = QFMT_VFS_OLD; 1050ac27a0ecSDave Kleikamp break; 1051ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1052ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = QFMT_VFS_V0; 1053ac27a0ecSDave Kleikamp break; 1054ac27a0ecSDave Kleikamp case Opt_quota: 1055ac27a0ecSDave Kleikamp case Opt_usrquota: 1056ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1057ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1058ac27a0ecSDave Kleikamp break; 1059ac27a0ecSDave Kleikamp case Opt_grpquota: 1060ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1061ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1062ac27a0ecSDave Kleikamp break; 1063ac27a0ecSDave Kleikamp case Opt_noquota: 1064ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1065617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1066ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1067ac27a0ecSDave Kleikamp return 0; 1068ac27a0ecSDave Kleikamp } 1069ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1070ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1071ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1072ac27a0ecSDave Kleikamp break; 1073ac27a0ecSDave Kleikamp #else 1074ac27a0ecSDave Kleikamp case Opt_quota: 1075ac27a0ecSDave Kleikamp case Opt_usrquota: 1076ac27a0ecSDave Kleikamp case Opt_grpquota: 1077ac27a0ecSDave Kleikamp case Opt_usrjquota: 1078ac27a0ecSDave Kleikamp case Opt_grpjquota: 1079ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1080ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1081ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1082ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1083ac27a0ecSDave Kleikamp printk(KERN_ERR 1084617ba13bSMingming Cao "EXT4-fs: journalled quota options not " 1085ac27a0ecSDave Kleikamp "supported.\n"); 1086ac27a0ecSDave Kleikamp break; 1087ac27a0ecSDave Kleikamp case Opt_noquota: 1088ac27a0ecSDave Kleikamp break; 1089ac27a0ecSDave Kleikamp #endif 1090ac27a0ecSDave Kleikamp case Opt_abort: 1091ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1092ac27a0ecSDave Kleikamp break; 1093ac27a0ecSDave Kleikamp case Opt_barrier: 1094ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1095ac27a0ecSDave Kleikamp return 0; 1096ac27a0ecSDave Kleikamp if (option) 1097ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1098ac27a0ecSDave Kleikamp else 1099ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1100ac27a0ecSDave Kleikamp break; 1101ac27a0ecSDave Kleikamp case Opt_ignore: 1102ac27a0ecSDave Kleikamp break; 1103ac27a0ecSDave Kleikamp case Opt_resize: 1104ac27a0ecSDave Kleikamp if (!is_remount) { 1105617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1106ac27a0ecSDave Kleikamp "for remount\n"); 1107ac27a0ecSDave Kleikamp return 0; 1108ac27a0ecSDave Kleikamp } 1109ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1110ac27a0ecSDave Kleikamp return 0; 1111ac27a0ecSDave Kleikamp *n_blocks_count = option; 1112ac27a0ecSDave Kleikamp break; 1113ac27a0ecSDave Kleikamp case Opt_nobh: 1114ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1115ac27a0ecSDave Kleikamp break; 1116ac27a0ecSDave Kleikamp case Opt_bh: 1117ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1118ac27a0ecSDave Kleikamp break; 1119a86c6181SAlex Tomas case Opt_extents: 1120a86c6181SAlex Tomas set_opt (sbi->s_mount_opt, EXTENTS); 1121a86c6181SAlex Tomas break; 1122ac27a0ecSDave Kleikamp default: 1123ac27a0ecSDave Kleikamp printk (KERN_ERR 1124617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1125ac27a0ecSDave Kleikamp "or missing value\n", p); 1126ac27a0ecSDave Kleikamp return 0; 1127ac27a0ecSDave Kleikamp } 1128ac27a0ecSDave Kleikamp } 1129ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1130ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1131617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1132ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1133ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1134ac27a0ecSDave Kleikamp 1135617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1136ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1137ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1138ac27a0ecSDave Kleikamp 1139ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1140617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1141ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1142617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1143617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1144ac27a0ecSDave Kleikamp "format mixing.\n"); 1145ac27a0ecSDave Kleikamp return 0; 1146ac27a0ecSDave Kleikamp } 1147ac27a0ecSDave Kleikamp 1148ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1149617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journalled quota format " 1150ac27a0ecSDave Kleikamp "not specified.\n"); 1151ac27a0ecSDave Kleikamp return 0; 1152ac27a0ecSDave Kleikamp } 1153ac27a0ecSDave Kleikamp } else { 1154ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1155617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journalled quota format " 1156ac27a0ecSDave Kleikamp "specified with no journalling " 1157ac27a0ecSDave Kleikamp "enabled.\n"); 1158ac27a0ecSDave Kleikamp return 0; 1159ac27a0ecSDave Kleikamp } 1160ac27a0ecSDave Kleikamp } 1161ac27a0ecSDave Kleikamp #endif 1162ac27a0ecSDave Kleikamp return 1; 1163ac27a0ecSDave Kleikamp } 1164ac27a0ecSDave Kleikamp 1165617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1166ac27a0ecSDave Kleikamp int read_only) 1167ac27a0ecSDave Kleikamp { 1168617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1169ac27a0ecSDave Kleikamp int res = 0; 1170ac27a0ecSDave Kleikamp 1171617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1172617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs warning: revision level too high, " 1173ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1174ac27a0ecSDave Kleikamp res = MS_RDONLY; 1175ac27a0ecSDave Kleikamp } 1176ac27a0ecSDave Kleikamp if (read_only) 1177ac27a0ecSDave Kleikamp return res; 1178617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1179617ba13bSMingming Cao printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1180ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1181617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1182ac27a0ecSDave Kleikamp printk (KERN_WARNING 1183617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1184ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1185ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1186ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1187ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1188ac27a0ecSDave Kleikamp printk (KERN_WARNING 1189617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1190ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1191ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1192ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1193ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1194ac27a0ecSDave Kleikamp printk (KERN_WARNING 1195617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1196ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1197ac27a0ecSDave Kleikamp #if 0 1198ac27a0ecSDave Kleikamp /* @@@ We _will_ want to clear the valid bit if we find 119963f57933SAndrew Morton * inconsistencies, to force a fsck at reboot. But for 120063f57933SAndrew Morton * a plain journaled filesystem we can keep it set as 120163f57933SAndrew Morton * valid forever! :) 120263f57933SAndrew Morton */ 1203617ba13bSMingming Cao es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT4_VALID_FS); 1204ac27a0ecSDave Kleikamp #endif 1205ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1206617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1207ac27a0ecSDave Kleikamp es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1); 1208ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1209617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 1210617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1211ac27a0ecSDave Kleikamp 1212617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1213ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1214617ba13bSMingming Cao printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " 1215ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1216ac27a0ecSDave Kleikamp sb->s_blocksize, 1217ac27a0ecSDave Kleikamp sbi->s_groups_count, 1218617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1219617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1220ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1221ac27a0ecSDave Kleikamp 1222617ba13bSMingming Cao printk(KERN_INFO "EXT4 FS on %s, ", sb->s_id); 1223617ba13bSMingming Cao if (EXT4_SB(sb)->s_journal->j_inode == NULL) { 1224ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 1225ac27a0ecSDave Kleikamp 1226ac27a0ecSDave Kleikamp printk("external journal on %s\n", 1227617ba13bSMingming Cao bdevname(EXT4_SB(sb)->s_journal->j_dev, b)); 1228ac27a0ecSDave Kleikamp } else { 1229ac27a0ecSDave Kleikamp printk("internal journal\n"); 1230ac27a0ecSDave Kleikamp } 1231ac27a0ecSDave Kleikamp return res; 1232ac27a0ecSDave Kleikamp } 1233ac27a0ecSDave Kleikamp 1234ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1235617ba13bSMingming Cao static int ext4_check_descriptors (struct super_block * sb) 1236ac27a0ecSDave Kleikamp { 1237617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1238617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1239617ba13bSMingming Cao ext4_fsblk_t last_block; 1240bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1241bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1242bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1243617ba13bSMingming Cao struct ext4_group_desc * gdp = NULL; 1244ac27a0ecSDave Kleikamp int desc_block = 0; 1245ac27a0ecSDave Kleikamp int i; 1246ac27a0ecSDave Kleikamp 1247617ba13bSMingming Cao ext4_debug ("Checking group descriptors"); 1248ac27a0ecSDave Kleikamp 1249ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_groups_count; i++) 1250ac27a0ecSDave Kleikamp { 1251ac27a0ecSDave Kleikamp if (i == sbi->s_groups_count - 1) 1252bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1253ac27a0ecSDave Kleikamp else 1254ac27a0ecSDave Kleikamp last_block = first_block + 1255617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1256ac27a0ecSDave Kleikamp 1257617ba13bSMingming Cao if ((i % EXT4_DESC_PER_BLOCK(sb)) == 0) 1258617ba13bSMingming Cao gdp = (struct ext4_group_desc *) 1259ac27a0ecSDave Kleikamp sbi->s_group_desc[desc_block++]->b_data; 12608fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 1261bd81d8eeSLaurent Vivier if (block_bitmap < first_block || block_bitmap > last_block) 1262ac27a0ecSDave Kleikamp { 1263617ba13bSMingming Cao ext4_error (sb, "ext4_check_descriptors", 1264ac27a0ecSDave Kleikamp "Block bitmap for group %d" 12652ae02107SMingming Cao " not in group (block %llu)!", 1266bd81d8eeSLaurent Vivier i, block_bitmap); 1267ac27a0ecSDave Kleikamp return 0; 1268ac27a0ecSDave Kleikamp } 12698fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 1270bd81d8eeSLaurent Vivier if (inode_bitmap < first_block || inode_bitmap > last_block) 1271ac27a0ecSDave Kleikamp { 1272617ba13bSMingming Cao ext4_error (sb, "ext4_check_descriptors", 1273ac27a0ecSDave Kleikamp "Inode bitmap for group %d" 12742ae02107SMingming Cao " not in group (block %llu)!", 1275bd81d8eeSLaurent Vivier i, inode_bitmap); 1276ac27a0ecSDave Kleikamp return 0; 1277ac27a0ecSDave Kleikamp } 12788fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1279bd81d8eeSLaurent Vivier if (inode_table < first_block || 1280bd81d8eeSLaurent Vivier inode_table + sbi->s_itb_per_group > last_block) 1281ac27a0ecSDave Kleikamp { 1282617ba13bSMingming Cao ext4_error (sb, "ext4_check_descriptors", 1283ac27a0ecSDave Kleikamp "Inode table for group %d" 12842ae02107SMingming Cao " not in group (block %llu)!", 1285bd81d8eeSLaurent Vivier i, inode_table); 1286ac27a0ecSDave Kleikamp return 0; 1287ac27a0ecSDave Kleikamp } 1288617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 12890d1ee42fSAlexandre Ratchov gdp = (struct ext4_group_desc *) 12900d1ee42fSAlexandre Ratchov ((__u8 *)gdp + EXT4_DESC_SIZE(sb)); 1291ac27a0ecSDave Kleikamp } 1292ac27a0ecSDave Kleikamp 1293bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1294617ba13bSMingming Cao sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb)); 1295ac27a0ecSDave Kleikamp return 1; 1296ac27a0ecSDave Kleikamp } 1297ac27a0ecSDave Kleikamp 1298ac27a0ecSDave Kleikamp 1299617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1300ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1301ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1302ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1303ac27a0ecSDave Kleikamp * 1304ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1305ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1306ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1307ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1308ac27a0ecSDave Kleikamp * 1309ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1310ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1311ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1312617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1313ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1314ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1315ac27a0ecSDave Kleikamp */ 1316617ba13bSMingming Cao static void ext4_orphan_cleanup (struct super_block * sb, 1317617ba13bSMingming Cao struct ext4_super_block * es) 1318ac27a0ecSDave Kleikamp { 1319ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1320ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1321ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1322ac27a0ecSDave Kleikamp int i; 1323ac27a0ecSDave Kleikamp #endif 1324ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1325ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1326ac27a0ecSDave Kleikamp return; 1327ac27a0ecSDave Kleikamp } 1328ac27a0ecSDave Kleikamp 1329a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1330a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1331a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1332a8f48a95SEric Sandeen return; 1333a8f48a95SEric Sandeen } 1334a8f48a95SEric Sandeen 1335617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1336ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1337ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1338ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1339ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1340ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1341ac27a0ecSDave Kleikamp return; 1342ac27a0ecSDave Kleikamp } 1343ac27a0ecSDave Kleikamp 1344ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1345617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1346ac27a0ecSDave Kleikamp sb->s_id); 1347ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1348ac27a0ecSDave Kleikamp } 1349ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1350ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1351ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1352ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1353ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1354617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1355617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1356ac27a0ecSDave Kleikamp if (ret < 0) 1357ac27a0ecSDave Kleikamp printk(KERN_ERR 1358617ba13bSMingming Cao "EXT4-fs: Cannot turn on journalled " 1359ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1360ac27a0ecSDave Kleikamp } 1361ac27a0ecSDave Kleikamp } 1362ac27a0ecSDave Kleikamp #endif 1363ac27a0ecSDave Kleikamp 1364ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1365ac27a0ecSDave Kleikamp struct inode *inode; 1366ac27a0ecSDave Kleikamp 1367ac27a0ecSDave Kleikamp if (!(inode = 1368617ba13bSMingming Cao ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) { 1369ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1370ac27a0ecSDave Kleikamp break; 1371ac27a0ecSDave Kleikamp } 1372ac27a0ecSDave Kleikamp 1373617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1374ac27a0ecSDave Kleikamp DQUOT_INIT(inode); 1375ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1376ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1377ac27a0ecSDave Kleikamp "%s: truncating inode %lu to %Ld bytes\n", 1378ac27a0ecSDave Kleikamp __FUNCTION__, inode->i_ino, inode->i_size); 1379ac27a0ecSDave Kleikamp jbd_debug(2, "truncating inode %lu to %Ld bytes\n", 1380ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1381617ba13bSMingming Cao ext4_truncate(inode); 1382ac27a0ecSDave Kleikamp nr_truncates++; 1383ac27a0ecSDave Kleikamp } else { 1384ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1385ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 1386ac27a0ecSDave Kleikamp __FUNCTION__, inode->i_ino); 1387ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1388ac27a0ecSDave Kleikamp inode->i_ino); 1389ac27a0ecSDave Kleikamp nr_orphans++; 1390ac27a0ecSDave Kleikamp } 1391ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1392ac27a0ecSDave Kleikamp } 1393ac27a0ecSDave Kleikamp 1394ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x)==1) ? "" : "s" 1395ac27a0ecSDave Kleikamp 1396ac27a0ecSDave Kleikamp if (nr_orphans) 1397617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1398ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1399ac27a0ecSDave Kleikamp if (nr_truncates) 1400617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1401ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1402ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1403ac27a0ecSDave Kleikamp /* Turn quotas off */ 1404ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1405ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 1406ac27a0ecSDave Kleikamp vfs_quota_off(sb, i); 1407ac27a0ecSDave Kleikamp } 1408ac27a0ecSDave Kleikamp #endif 1409ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1410ac27a0ecSDave Kleikamp } 1411ac27a0ecSDave Kleikamp 1412ac27a0ecSDave Kleikamp #define log2(n) ffz(~(n)) 1413ac27a0ecSDave Kleikamp 1414ac27a0ecSDave Kleikamp /* 1415ac27a0ecSDave Kleikamp * Maximal file size. There is a direct, and {,double-,triple-}indirect 1416ac27a0ecSDave Kleikamp * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. 1417ac27a0ecSDave Kleikamp * We need to be 1 filesystem block less than the 2^32 sector limit. 1418ac27a0ecSDave Kleikamp */ 1419617ba13bSMingming Cao static loff_t ext4_max_size(int bits) 1420ac27a0ecSDave Kleikamp { 1421617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 1422ac27a0ecSDave Kleikamp /* This constant is calculated to be the largest file size for a 1423ac27a0ecSDave Kleikamp * dense, 4k-blocksize file such that the total number of 1424ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 1425ac27a0ecSDave Kleikamp * does not exceed 2^32. */ 1426ac27a0ecSDave Kleikamp const loff_t upper_limit = 0x1ff7fffd000LL; 1427ac27a0ecSDave Kleikamp 1428ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1429ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1430ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1431ac27a0ecSDave Kleikamp res <<= bits; 1432ac27a0ecSDave Kleikamp if (res > upper_limit) 1433ac27a0ecSDave Kleikamp res = upper_limit; 1434ac27a0ecSDave Kleikamp return res; 1435ac27a0ecSDave Kleikamp } 1436ac27a0ecSDave Kleikamp 1437617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 143870bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1439ac27a0ecSDave Kleikamp { 1440617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1441ac27a0ecSDave Kleikamp unsigned long bg, first_meta_bg; 1442ac27a0ecSDave Kleikamp int has_super = 0; 1443ac27a0ecSDave Kleikamp 1444ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 1445ac27a0ecSDave Kleikamp 1446617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 1447ac27a0ecSDave Kleikamp nr < first_meta_bg) 144870bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 1449ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 1450617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 1451ac27a0ecSDave Kleikamp has_super = 1; 1452617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 1453ac27a0ecSDave Kleikamp } 1454ac27a0ecSDave Kleikamp 1455ac27a0ecSDave Kleikamp 1456617ba13bSMingming Cao static int ext4_fill_super (struct super_block *sb, void *data, int silent) 1457ac27a0ecSDave Kleikamp { 1458ac27a0ecSDave Kleikamp struct buffer_head * bh; 1459617ba13bSMingming Cao struct ext4_super_block *es = NULL; 1460617ba13bSMingming Cao struct ext4_sb_info *sbi; 1461617ba13bSMingming Cao ext4_fsblk_t block; 1462617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 146370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 1464ac27a0ecSDave Kleikamp unsigned long offset = 0; 1465ac27a0ecSDave Kleikamp unsigned int journal_inum = 0; 1466ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 1467ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 1468ac27a0ecSDave Kleikamp struct inode *root; 1469ac27a0ecSDave Kleikamp int blocksize; 1470ac27a0ecSDave Kleikamp int hblock; 1471ac27a0ecSDave Kleikamp int db_count; 1472ac27a0ecSDave Kleikamp int i; 1473ac27a0ecSDave Kleikamp int needs_recovery; 1474ac27a0ecSDave Kleikamp __le32 features; 1475bd81d8eeSLaurent Vivier __u64 blocks_count; 1476ac27a0ecSDave Kleikamp 1477ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 1478ac27a0ecSDave Kleikamp if (!sbi) 1479ac27a0ecSDave Kleikamp return -ENOMEM; 1480ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 1481ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 1482617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 1483617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 1484ac27a0ecSDave Kleikamp 1485ac27a0ecSDave Kleikamp unlock_kernel(); 1486ac27a0ecSDave Kleikamp 1487617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 1488ac27a0ecSDave Kleikamp if (!blocksize) { 1489617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 1490ac27a0ecSDave Kleikamp goto out_fail; 1491ac27a0ecSDave Kleikamp } 1492ac27a0ecSDave Kleikamp 1493ac27a0ecSDave Kleikamp /* 1494617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 1495ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 1496ac27a0ecSDave Kleikamp */ 1497617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 149870bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 149970bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 1500ac27a0ecSDave Kleikamp } else { 150170bbb3e0SAndrew Morton logical_sb_block = sb_block; 1502ac27a0ecSDave Kleikamp } 1503ac27a0ecSDave Kleikamp 150470bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 1505617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: unable to read superblock\n"); 1506ac27a0ecSDave Kleikamp goto out_fail; 1507ac27a0ecSDave Kleikamp } 1508ac27a0ecSDave Kleikamp /* 1509ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 1510617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 1511ac27a0ecSDave Kleikamp */ 1512617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 1513ac27a0ecSDave Kleikamp sbi->s_es = es; 1514ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 1515617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 1516617ba13bSMingming Cao goto cantfind_ext4; 1517ac27a0ecSDave Kleikamp 1518ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 1519ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1520617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 1521ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1522617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 1523ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1524617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 1525ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 15262e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_XATTR 1527617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 1528ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 15292e7842b8SHugh Dickins #endif 15302e7842b8SHugh Dickins #ifdef CONFIG_EXT4DEV_FS_POSIX_ACL 1531617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 1532ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 15332e7842b8SHugh Dickins #endif 1534617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 1535617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 1536617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 1537617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 1538617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 1539617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 1540ac27a0ecSDave Kleikamp 1541617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 1542ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1543617ba13bSMingming Cao else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_RO) 1544ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1545ceea16bfSDmitry Mishin else 1546ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 1547ac27a0ecSDave Kleikamp 1548ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 1549ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 1550ac27a0ecSDave Kleikamp 1551ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1552ac27a0ecSDave Kleikamp 1553ac27a0ecSDave Kleikamp if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, 1554ac27a0ecSDave Kleikamp NULL, 0)) 1555ac27a0ecSDave Kleikamp goto failed_mount; 1556ac27a0ecSDave Kleikamp 1557ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 1558617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 1559ac27a0ecSDave Kleikamp 1560617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 1561617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 1562617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 1563617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 1564ac27a0ecSDave Kleikamp printk(KERN_WARNING 1565617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 1566ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1567ac27a0ecSDave Kleikamp /* 1568ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 1569ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 1570ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 1571ac27a0ecSDave Kleikamp */ 1572617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 1573ac27a0ecSDave Kleikamp if (features) { 1574617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 1575ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 1576ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 1577ac27a0ecSDave Kleikamp goto failed_mount; 1578ac27a0ecSDave Kleikamp } 1579617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 1580ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 1581617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 1582ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 1583ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 1584ac27a0ecSDave Kleikamp goto failed_mount; 1585ac27a0ecSDave Kleikamp } 1586ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 1587ac27a0ecSDave Kleikamp 1588617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 1589617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 1590ac27a0ecSDave Kleikamp printk(KERN_ERR 1591617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 1592ac27a0ecSDave Kleikamp blocksize, sb->s_id); 1593ac27a0ecSDave Kleikamp goto failed_mount; 1594ac27a0ecSDave Kleikamp } 1595ac27a0ecSDave Kleikamp 1596ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(sb->s_bdev); 1597ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 1598ac27a0ecSDave Kleikamp /* 1599ac27a0ecSDave Kleikamp * Make sure the blocksize for the filesystem is larger 1600ac27a0ecSDave Kleikamp * than the hardware sectorsize for the machine. 1601ac27a0ecSDave Kleikamp */ 1602ac27a0ecSDave Kleikamp if (blocksize < hblock) { 1603617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: blocksize %d too small for " 1604ac27a0ecSDave Kleikamp "device blocksize %d.\n", blocksize, hblock); 1605ac27a0ecSDave Kleikamp goto failed_mount; 1606ac27a0ecSDave Kleikamp } 1607ac27a0ecSDave Kleikamp 1608ac27a0ecSDave Kleikamp brelse (bh); 1609ac27a0ecSDave Kleikamp sb_set_blocksize(sb, blocksize); 161070bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 161170bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 161270bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 1613ac27a0ecSDave Kleikamp if (!bh) { 1614ac27a0ecSDave Kleikamp printk(KERN_ERR 1615617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 1616ac27a0ecSDave Kleikamp goto failed_mount; 1617ac27a0ecSDave Kleikamp } 1618617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 1619ac27a0ecSDave Kleikamp sbi->s_es = es; 1620617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 1621ac27a0ecSDave Kleikamp printk (KERN_ERR 1622617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 1623ac27a0ecSDave Kleikamp goto failed_mount; 1624ac27a0ecSDave Kleikamp } 1625ac27a0ecSDave Kleikamp } 1626ac27a0ecSDave Kleikamp 1627617ba13bSMingming Cao sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits); 1628ac27a0ecSDave Kleikamp 1629617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 1630617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 1631617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 1632ac27a0ecSDave Kleikamp } else { 1633ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 1634ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 1635617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 1636ac27a0ecSDave Kleikamp (sbi->s_inode_size & (sbi->s_inode_size - 1)) || 1637ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 1638ac27a0ecSDave Kleikamp printk (KERN_ERR 1639617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 1640ac27a0ecSDave Kleikamp sbi->s_inode_size); 1641ac27a0ecSDave Kleikamp goto failed_mount; 1642ac27a0ecSDave Kleikamp } 1643ac27a0ecSDave Kleikamp } 1644617ba13bSMingming Cao sbi->s_frag_size = EXT4_MIN_FRAG_SIZE << 1645ac27a0ecSDave Kleikamp le32_to_cpu(es->s_log_frag_size); 1646ac27a0ecSDave Kleikamp if (blocksize != sbi->s_frag_size) { 1647ac27a0ecSDave Kleikamp printk(KERN_ERR 1648617ba13bSMingming Cao "EXT4-fs: fragsize %lu != blocksize %u (unsupported)\n", 1649ac27a0ecSDave Kleikamp sbi->s_frag_size, blocksize); 1650ac27a0ecSDave Kleikamp goto failed_mount; 1651ac27a0ecSDave Kleikamp } 16520d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 16530d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 16548fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 16550d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 16560d1ee42fSAlexandre Ratchov sbi->s_desc_size & (sbi->s_desc_size - 1)) { 16570d1ee42fSAlexandre Ratchov printk(KERN_ERR 16588fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 16590d1ee42fSAlexandre Ratchov sbi->s_desc_size); 16600d1ee42fSAlexandre Ratchov goto failed_mount; 16610d1ee42fSAlexandre Ratchov } 16620d1ee42fSAlexandre Ratchov } else 16630d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 1664ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 1665ac27a0ecSDave Kleikamp sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group); 1666ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 1667617ba13bSMingming Cao if (EXT4_INODE_SIZE(sb) == 0) 1668617ba13bSMingming Cao goto cantfind_ext4; 1669617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 1670ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 1671617ba13bSMingming Cao goto cantfind_ext4; 1672ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 1673ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 16740d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 1675ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 1676ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 1677617ba13bSMingming Cao sbi->s_addr_per_block_bits = log2(EXT4_ADDR_PER_BLOCK(sb)); 1678617ba13bSMingming Cao sbi->s_desc_per_block_bits = log2(EXT4_DESC_PER_BLOCK(sb)); 1679ac27a0ecSDave Kleikamp for (i=0; i < 4; i++) 1680ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 1681ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 1682ac27a0ecSDave Kleikamp 1683ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 1684ac27a0ecSDave Kleikamp printk (KERN_ERR 1685617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 1686ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 1687ac27a0ecSDave Kleikamp goto failed_mount; 1688ac27a0ecSDave Kleikamp } 1689ac27a0ecSDave Kleikamp if (sbi->s_frags_per_group > blocksize * 8) { 1690ac27a0ecSDave Kleikamp printk (KERN_ERR 1691617ba13bSMingming Cao "EXT4-fs: #fragments per group too big: %lu\n", 1692ac27a0ecSDave Kleikamp sbi->s_frags_per_group); 1693ac27a0ecSDave Kleikamp goto failed_mount; 1694ac27a0ecSDave Kleikamp } 1695ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 1696ac27a0ecSDave Kleikamp printk (KERN_ERR 1697617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 1698ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 1699ac27a0ecSDave Kleikamp goto failed_mount; 1700ac27a0ecSDave Kleikamp } 1701ac27a0ecSDave Kleikamp 1702bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 1703ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 1704617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 1705ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 1706ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 1707617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 1708ac27a0ecSDave Kleikamp "enabled\n"); 1709ac27a0ecSDave Kleikamp goto failed_mount; 1710ac27a0ecSDave Kleikamp } 1711ac27a0ecSDave Kleikamp 1712617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 1713617ba13bSMingming Cao goto cantfind_ext4; 1714bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 1715bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 1716bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 1717bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 1718bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 1719617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 1720617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 1721ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), 1722ac27a0ecSDave Kleikamp GFP_KERNEL); 1723ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 1724617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: not enough memory\n"); 1725ac27a0ecSDave Kleikamp goto failed_mount; 1726ac27a0ecSDave Kleikamp } 1727ac27a0ecSDave Kleikamp 1728ac27a0ecSDave Kleikamp bgl_lock_init(&sbi->s_blockgroup_lock); 1729ac27a0ecSDave Kleikamp 1730ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 173170bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 1732ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 1733ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 1734617ba13bSMingming Cao printk (KERN_ERR "EXT4-fs: " 1735ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 1736ac27a0ecSDave Kleikamp db_count = i; 1737ac27a0ecSDave Kleikamp goto failed_mount2; 1738ac27a0ecSDave Kleikamp } 1739ac27a0ecSDave Kleikamp } 1740617ba13bSMingming Cao if (!ext4_check_descriptors (sb)) { 1741617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 1742ac27a0ecSDave Kleikamp goto failed_mount2; 1743ac27a0ecSDave Kleikamp } 1744ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 1745ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 1746ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 1747ac27a0ecSDave Kleikamp 1748ac27a0ecSDave Kleikamp percpu_counter_init(&sbi->s_freeblocks_counter, 1749617ba13bSMingming Cao ext4_count_free_blocks(sb)); 1750ac27a0ecSDave Kleikamp percpu_counter_init(&sbi->s_freeinodes_counter, 1751617ba13bSMingming Cao ext4_count_free_inodes(sb)); 1752ac27a0ecSDave Kleikamp percpu_counter_init(&sbi->s_dirs_counter, 1753617ba13bSMingming Cao ext4_count_dirs(sb)); 1754ac27a0ecSDave Kleikamp 1755ac27a0ecSDave Kleikamp /* per fileystem reservation list head & lock */ 1756ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_rsv_window_lock); 1757ac27a0ecSDave Kleikamp sbi->s_rsv_window_root = RB_ROOT; 1758ac27a0ecSDave Kleikamp /* Add a single, static dummy reservation to the start of the 1759ac27a0ecSDave Kleikamp * reservation window list --- it gives us a placeholder for 1760ac27a0ecSDave Kleikamp * append-at-start-of-list which makes the allocation logic 1761ac27a0ecSDave Kleikamp * _much_ simpler. */ 1762617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 1763617ba13bSMingming Cao sbi->s_rsv_window_head.rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; 1764ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_alloc_hit = 0; 1765ac27a0ecSDave Kleikamp sbi->s_rsv_window_head.rsv_goal_size = 0; 1766617ba13bSMingming Cao ext4_rsv_window_add(sb, &sbi->s_rsv_window_head); 1767ac27a0ecSDave Kleikamp 1768ac27a0ecSDave Kleikamp /* 1769ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 1770ac27a0ecSDave Kleikamp */ 1771617ba13bSMingming Cao sb->s_op = &ext4_sops; 1772617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 1773617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 1774ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1775617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 1776617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 1777ac27a0ecSDave Kleikamp #endif 1778ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 1779ac27a0ecSDave Kleikamp 1780ac27a0ecSDave Kleikamp sb->s_root = NULL; 1781ac27a0ecSDave Kleikamp 1782ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 1783617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 1784617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 1785ac27a0ecSDave Kleikamp 1786ac27a0ecSDave Kleikamp /* 1787ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 1788ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 1789ac27a0ecSDave Kleikamp */ 1790ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 1791617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 1792617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 1793ac27a0ecSDave Kleikamp goto failed_mount3; 1794ac27a0ecSDave Kleikamp } else if (journal_inum) { 1795617ba13bSMingming Cao if (ext4_create_journal(sb, es, journal_inum)) 1796ac27a0ecSDave Kleikamp goto failed_mount3; 1797ac27a0ecSDave Kleikamp } else { 1798ac27a0ecSDave Kleikamp if (!silent) 1799ac27a0ecSDave Kleikamp printk (KERN_ERR 1800617ba13bSMingming Cao "ext4: No journal on filesystem on %s\n", 1801ac27a0ecSDave Kleikamp sb->s_id); 1802ac27a0ecSDave Kleikamp goto failed_mount3; 1803ac27a0ecSDave Kleikamp } 1804ac27a0ecSDave Kleikamp 1805ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 1806ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 1807ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 1808ac27a0ecSDave Kleikamp case 0: 1809ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 181063f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 181163f57933SAndrew Morton * cope, else JOURNAL_DATA 181263f57933SAndrew Morton */ 1813dab291afSMingming Cao if (jbd2_journal_check_available_features 1814dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 1815ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 1816ac27a0ecSDave Kleikamp else 1817ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 1818ac27a0ecSDave Kleikamp break; 1819ac27a0ecSDave Kleikamp 1820617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 1821617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 1822dab291afSMingming Cao if (!jbd2_journal_check_available_features 1823dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 1824617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 1825ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 1826ac27a0ecSDave Kleikamp goto failed_mount4; 1827ac27a0ecSDave Kleikamp } 1828ac27a0ecSDave Kleikamp default: 1829ac27a0ecSDave Kleikamp break; 1830ac27a0ecSDave Kleikamp } 1831ac27a0ecSDave Kleikamp 1832ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 1833617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 1834617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 1835ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 1836ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1837ac27a0ecSDave Kleikamp } 1838ac27a0ecSDave Kleikamp } 1839ac27a0ecSDave Kleikamp /* 1840dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 1841ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 1842ac27a0ecSDave Kleikamp */ 1843ac27a0ecSDave Kleikamp 1844617ba13bSMingming Cao root = iget(sb, EXT4_ROOT_INO); 1845ac27a0ecSDave Kleikamp sb->s_root = d_alloc_root(root); 1846ac27a0ecSDave Kleikamp if (!sb->s_root) { 1847617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 1848ac27a0ecSDave Kleikamp iput(root); 1849ac27a0ecSDave Kleikamp goto failed_mount4; 1850ac27a0ecSDave Kleikamp } 1851ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 1852ac27a0ecSDave Kleikamp dput(sb->s_root); 1853ac27a0ecSDave Kleikamp sb->s_root = NULL; 1854617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 1855ac27a0ecSDave Kleikamp goto failed_mount4; 1856ac27a0ecSDave Kleikamp } 1857ac27a0ecSDave Kleikamp 1858617ba13bSMingming Cao ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY); 1859ac27a0ecSDave Kleikamp /* 1860ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 1861ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 1862ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 1863ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 1864ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 1865ac27a0ecSDave Kleikamp * superblock lock. 1866ac27a0ecSDave Kleikamp */ 1867617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 1868617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 1869617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 1870ac27a0ecSDave Kleikamp if (needs_recovery) 1871617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: recovery complete.\n"); 1872617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 1873617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", 1874617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": 1875617ba13bSMingming Cao test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": 1876ac27a0ecSDave Kleikamp "writeback"); 1877ac27a0ecSDave Kleikamp 1878a86c6181SAlex Tomas ext4_ext_init(sb); 1879a86c6181SAlex Tomas 1880ac27a0ecSDave Kleikamp lock_kernel(); 1881ac27a0ecSDave Kleikamp return 0; 1882ac27a0ecSDave Kleikamp 1883617ba13bSMingming Cao cantfind_ext4: 1884ac27a0ecSDave Kleikamp if (!silent) 1885617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 1886ac27a0ecSDave Kleikamp sb->s_id); 1887ac27a0ecSDave Kleikamp goto failed_mount; 1888ac27a0ecSDave Kleikamp 1889ac27a0ecSDave Kleikamp failed_mount4: 1890dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 1891ac27a0ecSDave Kleikamp failed_mount3: 1892ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 1893ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 1894ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 1895ac27a0ecSDave Kleikamp failed_mount2: 1896ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 1897ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 1898ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 1899ac27a0ecSDave Kleikamp failed_mount: 1900ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1901ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 1902ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 1903ac27a0ecSDave Kleikamp #endif 1904617ba13bSMingming Cao ext4_blkdev_remove(sbi); 1905ac27a0ecSDave Kleikamp brelse(bh); 1906ac27a0ecSDave Kleikamp out_fail: 1907ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 1908ac27a0ecSDave Kleikamp kfree(sbi); 1909ac27a0ecSDave Kleikamp lock_kernel(); 1910ac27a0ecSDave Kleikamp return -EINVAL; 1911ac27a0ecSDave Kleikamp } 1912ac27a0ecSDave Kleikamp 1913ac27a0ecSDave Kleikamp /* 1914ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 1915ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 1916ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 1917ac27a0ecSDave Kleikamp */ 1918617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 1919ac27a0ecSDave Kleikamp { 1920617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1921ac27a0ecSDave Kleikamp 1922ac27a0ecSDave Kleikamp if (sbi->s_commit_interval) 1923ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 1924617ba13bSMingming Cao /* We could also set up an ext4-specific default for the commit 1925ac27a0ecSDave Kleikamp * interval here, but for now we'll just fall back to the jbd 1926ac27a0ecSDave Kleikamp * default. */ 1927ac27a0ecSDave Kleikamp 1928ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 1929ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 1930dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 1931ac27a0ecSDave Kleikamp else 1932dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 1933ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 1934ac27a0ecSDave Kleikamp } 1935ac27a0ecSDave Kleikamp 1936617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 1937ac27a0ecSDave Kleikamp unsigned int journal_inum) 1938ac27a0ecSDave Kleikamp { 1939ac27a0ecSDave Kleikamp struct inode *journal_inode; 1940ac27a0ecSDave Kleikamp journal_t *journal; 1941ac27a0ecSDave Kleikamp 1942ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 1943ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 1944ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 1945ac27a0ecSDave Kleikamp 1946ac27a0ecSDave Kleikamp journal_inode = iget(sb, journal_inum); 1947ac27a0ecSDave Kleikamp if (!journal_inode) { 1948617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 1949ac27a0ecSDave Kleikamp return NULL; 1950ac27a0ecSDave Kleikamp } 1951ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 1952ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 1953ac27a0ecSDave Kleikamp iput(journal_inode); 1954617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 1955ac27a0ecSDave Kleikamp return NULL; 1956ac27a0ecSDave Kleikamp } 1957ac27a0ecSDave Kleikamp 1958ac27a0ecSDave Kleikamp jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", 1959ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 1960ac27a0ecSDave Kleikamp if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) { 1961617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 1962ac27a0ecSDave Kleikamp iput(journal_inode); 1963ac27a0ecSDave Kleikamp return NULL; 1964ac27a0ecSDave Kleikamp } 1965ac27a0ecSDave Kleikamp 1966dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 1967ac27a0ecSDave Kleikamp if (!journal) { 1968617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 1969ac27a0ecSDave Kleikamp iput(journal_inode); 1970ac27a0ecSDave Kleikamp return NULL; 1971ac27a0ecSDave Kleikamp } 1972ac27a0ecSDave Kleikamp journal->j_private = sb; 1973617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 1974ac27a0ecSDave Kleikamp return journal; 1975ac27a0ecSDave Kleikamp } 1976ac27a0ecSDave Kleikamp 1977617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 1978ac27a0ecSDave Kleikamp dev_t j_dev) 1979ac27a0ecSDave Kleikamp { 1980ac27a0ecSDave Kleikamp struct buffer_head * bh; 1981ac27a0ecSDave Kleikamp journal_t *journal; 1982617ba13bSMingming Cao ext4_fsblk_t start; 1983617ba13bSMingming Cao ext4_fsblk_t len; 1984ac27a0ecSDave Kleikamp int hblock, blocksize; 1985617ba13bSMingming Cao ext4_fsblk_t sb_block; 1986ac27a0ecSDave Kleikamp unsigned long offset; 1987617ba13bSMingming Cao struct ext4_super_block * es; 1988ac27a0ecSDave Kleikamp struct block_device *bdev; 1989ac27a0ecSDave Kleikamp 1990617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 1991ac27a0ecSDave Kleikamp if (bdev == NULL) 1992ac27a0ecSDave Kleikamp return NULL; 1993ac27a0ecSDave Kleikamp 1994ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 1995ac27a0ecSDave Kleikamp printk(KERN_ERR 1996617ba13bSMingming Cao "EXT4: failed to claim external journal device.\n"); 1997ac27a0ecSDave Kleikamp blkdev_put(bdev); 1998ac27a0ecSDave Kleikamp return NULL; 1999ac27a0ecSDave Kleikamp } 2000ac27a0ecSDave Kleikamp 2001ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2002ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2003ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2004ac27a0ecSDave Kleikamp printk(KERN_ERR 2005617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2006ac27a0ecSDave Kleikamp goto out_bdev; 2007ac27a0ecSDave Kleikamp } 2008ac27a0ecSDave Kleikamp 2009617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2010617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2011ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2012ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2013617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2014ac27a0ecSDave Kleikamp "external journal\n"); 2015ac27a0ecSDave Kleikamp goto out_bdev; 2016ac27a0ecSDave Kleikamp } 2017ac27a0ecSDave Kleikamp 2018617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2019617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2020ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2021617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 2022617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 2023ac27a0ecSDave Kleikamp "bad superblock\n"); 2024ac27a0ecSDave Kleikamp brelse(bh); 2025ac27a0ecSDave Kleikamp goto out_bdev; 2026ac27a0ecSDave Kleikamp } 2027ac27a0ecSDave Kleikamp 2028617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 2029617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 2030ac27a0ecSDave Kleikamp brelse(bh); 2031ac27a0ecSDave Kleikamp goto out_bdev; 2032ac27a0ecSDave Kleikamp } 2033ac27a0ecSDave Kleikamp 2034bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 2035ac27a0ecSDave Kleikamp start = sb_block + 1; 2036ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 2037ac27a0ecSDave Kleikamp 2038dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 2039ac27a0ecSDave Kleikamp start, len, blocksize); 2040ac27a0ecSDave Kleikamp if (!journal) { 2041617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 2042ac27a0ecSDave Kleikamp goto out_bdev; 2043ac27a0ecSDave Kleikamp } 2044ac27a0ecSDave Kleikamp journal->j_private = sb; 2045ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 2046ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 2047ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 2048617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 2049ac27a0ecSDave Kleikamp goto out_journal; 2050ac27a0ecSDave Kleikamp } 2051ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 2052617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 2053ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 2054ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 2055ac27a0ecSDave Kleikamp goto out_journal; 2056ac27a0ecSDave Kleikamp } 2057617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 2058617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2059ac27a0ecSDave Kleikamp return journal; 2060ac27a0ecSDave Kleikamp out_journal: 2061dab291afSMingming Cao jbd2_journal_destroy(journal); 2062ac27a0ecSDave Kleikamp out_bdev: 2063617ba13bSMingming Cao ext4_blkdev_put(bdev); 2064ac27a0ecSDave Kleikamp return NULL; 2065ac27a0ecSDave Kleikamp } 2066ac27a0ecSDave Kleikamp 2067617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 2068617ba13bSMingming Cao struct ext4_super_block *es, 2069ac27a0ecSDave Kleikamp unsigned long journal_devnum) 2070ac27a0ecSDave Kleikamp { 2071ac27a0ecSDave Kleikamp journal_t *journal; 2072ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 2073ac27a0ecSDave Kleikamp dev_t journal_dev; 2074ac27a0ecSDave Kleikamp int err = 0; 2075ac27a0ecSDave Kleikamp int really_read_only; 2076ac27a0ecSDave Kleikamp 2077ac27a0ecSDave Kleikamp if (journal_devnum && 2078ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2079617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 2080ac27a0ecSDave Kleikamp "numbers have changed\n"); 2081ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 2082ac27a0ecSDave Kleikamp } else 2083ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 2084ac27a0ecSDave Kleikamp 2085ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 2086ac27a0ecSDave Kleikamp 2087ac27a0ecSDave Kleikamp /* 2088ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 2089ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 2090ac27a0ecSDave Kleikamp * can get read-write access to the device. 2091ac27a0ecSDave Kleikamp */ 2092ac27a0ecSDave Kleikamp 2093617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2094ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2095617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 2096ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 2097ac27a0ecSDave Kleikamp if (really_read_only) { 2098617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 2099ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 2100ac27a0ecSDave Kleikamp return -EROFS; 2101ac27a0ecSDave Kleikamp } 2102617ba13bSMingming Cao printk (KERN_INFO "EXT4-fs: write access will " 2103ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 2104ac27a0ecSDave Kleikamp } 2105ac27a0ecSDave Kleikamp } 2106ac27a0ecSDave Kleikamp 2107ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 2108617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 2109ac27a0ecSDave Kleikamp "and inode journals!\n"); 2110ac27a0ecSDave Kleikamp return -EINVAL; 2111ac27a0ecSDave Kleikamp } 2112ac27a0ecSDave Kleikamp 2113ac27a0ecSDave Kleikamp if (journal_inum) { 2114617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2115ac27a0ecSDave Kleikamp return -EINVAL; 2116ac27a0ecSDave Kleikamp } else { 2117617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 2118ac27a0ecSDave Kleikamp return -EINVAL; 2119ac27a0ecSDave Kleikamp } 2120ac27a0ecSDave Kleikamp 2121ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 2122dab291afSMingming Cao err = jbd2_journal_update_format(journal); 2123ac27a0ecSDave Kleikamp if (err) { 2124617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 2125dab291afSMingming Cao jbd2_journal_destroy(journal); 2126ac27a0ecSDave Kleikamp return err; 2127ac27a0ecSDave Kleikamp } 2128ac27a0ecSDave Kleikamp } 2129ac27a0ecSDave Kleikamp 2130617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 2131dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 2132ac27a0ecSDave Kleikamp if (!err) 2133dab291afSMingming Cao err = jbd2_journal_load(journal); 2134ac27a0ecSDave Kleikamp 2135ac27a0ecSDave Kleikamp if (err) { 2136617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 2137dab291afSMingming Cao jbd2_journal_destroy(journal); 2138ac27a0ecSDave Kleikamp return err; 2139ac27a0ecSDave Kleikamp } 2140ac27a0ecSDave Kleikamp 2141617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2142617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2143ac27a0ecSDave Kleikamp 2144ac27a0ecSDave Kleikamp if (journal_devnum && 2145ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2146ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 2147ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2148ac27a0ecSDave Kleikamp 2149ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2150617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2151ac27a0ecSDave Kleikamp } 2152ac27a0ecSDave Kleikamp 2153ac27a0ecSDave Kleikamp return 0; 2154ac27a0ecSDave Kleikamp } 2155ac27a0ecSDave Kleikamp 2156617ba13bSMingming Cao static int ext4_create_journal(struct super_block * sb, 2157617ba13bSMingming Cao struct ext4_super_block * es, 2158ac27a0ecSDave Kleikamp unsigned int journal_inum) 2159ac27a0ecSDave Kleikamp { 2160ac27a0ecSDave Kleikamp journal_t *journal; 2161ac27a0ecSDave Kleikamp 2162ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2163617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " 2164ac27a0ecSDave Kleikamp "create journal.\n"); 2165ac27a0ecSDave Kleikamp return -EROFS; 2166ac27a0ecSDave Kleikamp } 2167ac27a0ecSDave Kleikamp 2168617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2169ac27a0ecSDave Kleikamp return -EINVAL; 2170ac27a0ecSDave Kleikamp 2171617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", 2172ac27a0ecSDave Kleikamp journal_inum); 2173ac27a0ecSDave Kleikamp 2174dab291afSMingming Cao if (jbd2_journal_create(journal)) { 2175617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error creating journal.\n"); 2176dab291afSMingming Cao jbd2_journal_destroy(journal); 2177ac27a0ecSDave Kleikamp return -EIO; 2178ac27a0ecSDave Kleikamp } 2179ac27a0ecSDave Kleikamp 2180617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2181ac27a0ecSDave Kleikamp 2182617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 2183617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2184617ba13bSMingming Cao EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); 2185ac27a0ecSDave Kleikamp 2186ac27a0ecSDave Kleikamp es->s_journal_inum = cpu_to_le32(journal_inum); 2187ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2188ac27a0ecSDave Kleikamp 2189ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2190617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2191ac27a0ecSDave Kleikamp 2192ac27a0ecSDave Kleikamp return 0; 2193ac27a0ecSDave Kleikamp } 2194ac27a0ecSDave Kleikamp 2195617ba13bSMingming Cao static void ext4_commit_super (struct super_block * sb, 2196617ba13bSMingming Cao struct ext4_super_block * es, 2197ac27a0ecSDave Kleikamp int sync) 2198ac27a0ecSDave Kleikamp { 2199617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 2200ac27a0ecSDave Kleikamp 2201ac27a0ecSDave Kleikamp if (!sbh) 2202ac27a0ecSDave Kleikamp return; 2203ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 2204bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); 2205617ba13bSMingming Cao es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 2206ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 2207ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 2208ac27a0ecSDave Kleikamp if (sync) 2209ac27a0ecSDave Kleikamp sync_dirty_buffer(sbh); 2210ac27a0ecSDave Kleikamp } 2211ac27a0ecSDave Kleikamp 2212ac27a0ecSDave Kleikamp 2213ac27a0ecSDave Kleikamp /* 2214ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 2215ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 2216ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 2217ac27a0ecSDave Kleikamp */ 2218617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block * sb, 2219617ba13bSMingming Cao struct ext4_super_block * es) 2220ac27a0ecSDave Kleikamp { 2221617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2222ac27a0ecSDave Kleikamp 2223dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2224dab291afSMingming Cao jbd2_journal_flush(journal); 2225617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 2226ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 2227617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2228ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2229617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2230ac27a0ecSDave Kleikamp } 2231dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 2232ac27a0ecSDave Kleikamp } 2233ac27a0ecSDave Kleikamp 2234ac27a0ecSDave Kleikamp /* 2235ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 2236ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 2237ac27a0ecSDave Kleikamp * main filesystem now. 2238ac27a0ecSDave Kleikamp */ 2239617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block * sb, 2240617ba13bSMingming Cao struct ext4_super_block * es) 2241ac27a0ecSDave Kleikamp { 2242ac27a0ecSDave Kleikamp journal_t *journal; 2243ac27a0ecSDave Kleikamp int j_errno; 2244ac27a0ecSDave Kleikamp const char *errstr; 2245ac27a0ecSDave Kleikamp 2246617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2247ac27a0ecSDave Kleikamp 2248ac27a0ecSDave Kleikamp /* 2249ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 2250617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 2251ac27a0ecSDave Kleikamp */ 2252ac27a0ecSDave Kleikamp 2253dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 2254ac27a0ecSDave Kleikamp if (j_errno) { 2255ac27a0ecSDave Kleikamp char nbuf[16]; 2256ac27a0ecSDave Kleikamp 2257617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 2258617ba13bSMingming Cao ext4_warning(sb, __FUNCTION__, "Filesystem error recorded " 2259ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 2260617ba13bSMingming Cao ext4_warning(sb, __FUNCTION__, "Marking fs in need of " 2261ac27a0ecSDave Kleikamp "filesystem check."); 2262ac27a0ecSDave Kleikamp 2263617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2264617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2265617ba13bSMingming Cao ext4_commit_super (sb, es, 1); 2266ac27a0ecSDave Kleikamp 2267dab291afSMingming Cao jbd2_journal_clear_err(journal); 2268ac27a0ecSDave Kleikamp } 2269ac27a0ecSDave Kleikamp } 2270ac27a0ecSDave Kleikamp 2271ac27a0ecSDave Kleikamp /* 2272ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 2273ac27a0ecSDave Kleikamp * and wait on the commit. 2274ac27a0ecSDave Kleikamp */ 2275617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 2276ac27a0ecSDave Kleikamp { 2277ac27a0ecSDave Kleikamp journal_t *journal; 2278ac27a0ecSDave Kleikamp int ret; 2279ac27a0ecSDave Kleikamp 2280ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 2281ac27a0ecSDave Kleikamp return 0; 2282ac27a0ecSDave Kleikamp 2283617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2284ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2285617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 2286ac27a0ecSDave Kleikamp return ret; 2287ac27a0ecSDave Kleikamp } 2288ac27a0ecSDave Kleikamp 2289ac27a0ecSDave Kleikamp /* 2290617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 2291ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 2292ac27a0ecSDave Kleikamp * point. Just start an async writeback to get the buffers on their way 2293ac27a0ecSDave Kleikamp * to the disk. 2294ac27a0ecSDave Kleikamp * 2295ac27a0ecSDave Kleikamp * This implicitly triggers the writebehind on sync(). 2296ac27a0ecSDave Kleikamp */ 2297ac27a0ecSDave Kleikamp 2298617ba13bSMingming Cao static void ext4_write_super (struct super_block * sb) 2299ac27a0ecSDave Kleikamp { 2300ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 2301ac27a0ecSDave Kleikamp BUG(); 2302ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2303ac27a0ecSDave Kleikamp } 2304ac27a0ecSDave Kleikamp 2305617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 2306ac27a0ecSDave Kleikamp { 2307ac27a0ecSDave Kleikamp tid_t target; 2308ac27a0ecSDave Kleikamp 2309ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2310dab291afSMingming Cao if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { 2311ac27a0ecSDave Kleikamp if (wait) 2312dab291afSMingming Cao jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); 2313ac27a0ecSDave Kleikamp } 2314ac27a0ecSDave Kleikamp return 0; 2315ac27a0ecSDave Kleikamp } 2316ac27a0ecSDave Kleikamp 2317ac27a0ecSDave Kleikamp /* 2318ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 2319ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 2320ac27a0ecSDave Kleikamp */ 2321617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb) 2322ac27a0ecSDave Kleikamp { 2323ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2324ac27a0ecSDave Kleikamp 2325ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2326617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2327ac27a0ecSDave Kleikamp 2328ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 2329dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2330dab291afSMingming Cao jbd2_journal_flush(journal); 2331ac27a0ecSDave Kleikamp 2332ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 2333617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2334617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2335ac27a0ecSDave Kleikamp } 2336ac27a0ecSDave Kleikamp } 2337ac27a0ecSDave Kleikamp 2338ac27a0ecSDave Kleikamp /* 2339ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 2340ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 2341ac27a0ecSDave Kleikamp */ 2342617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb) 2343ac27a0ecSDave Kleikamp { 2344ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2345ac27a0ecSDave Kleikamp lock_super(sb); 2346ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 2347617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2348617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2349ac27a0ecSDave Kleikamp unlock_super(sb); 2350dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 2351ac27a0ecSDave Kleikamp } 2352ac27a0ecSDave Kleikamp } 2353ac27a0ecSDave Kleikamp 2354617ba13bSMingming Cao static int ext4_remount (struct super_block * sb, int * flags, char * data) 2355ac27a0ecSDave Kleikamp { 2356617ba13bSMingming Cao struct ext4_super_block * es; 2357617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2358617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 2359ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 2360617ba13bSMingming Cao struct ext4_mount_options old_opts; 2361ac27a0ecSDave Kleikamp int err; 2362ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2363ac27a0ecSDave Kleikamp int i; 2364ac27a0ecSDave Kleikamp #endif 2365ac27a0ecSDave Kleikamp 2366ac27a0ecSDave Kleikamp /* Store the original options */ 2367ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 2368ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 2369ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 2370ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 2371ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 2372ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2373ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 2374ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2375ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 2376ac27a0ecSDave Kleikamp #endif 2377ac27a0ecSDave Kleikamp 2378ac27a0ecSDave Kleikamp /* 2379ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 2380ac27a0ecSDave Kleikamp */ 2381ac27a0ecSDave Kleikamp if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { 2382ac27a0ecSDave Kleikamp err = -EINVAL; 2383ac27a0ecSDave Kleikamp goto restore_opts; 2384ac27a0ecSDave Kleikamp } 2385ac27a0ecSDave Kleikamp 2386617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 2387617ba13bSMingming Cao ext4_abort(sb, __FUNCTION__, "Abort forced by user"); 2388ac27a0ecSDave Kleikamp 2389ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2390617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2391ac27a0ecSDave Kleikamp 2392ac27a0ecSDave Kleikamp es = sbi->s_es; 2393ac27a0ecSDave Kleikamp 2394617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 2395ac27a0ecSDave Kleikamp 2396ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 2397bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 2398617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 2399ac27a0ecSDave Kleikamp err = -EROFS; 2400ac27a0ecSDave Kleikamp goto restore_opts; 2401ac27a0ecSDave Kleikamp } 2402ac27a0ecSDave Kleikamp 2403ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 2404ac27a0ecSDave Kleikamp /* 2405ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 2406ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 2407ac27a0ecSDave Kleikamp */ 2408ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 2409ac27a0ecSDave Kleikamp 2410ac27a0ecSDave Kleikamp /* 2411ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 2412ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 2413ac27a0ecSDave Kleikamp * mark the partition as valid again. 2414ac27a0ecSDave Kleikamp */ 2415617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 2416617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 2417ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 2418ac27a0ecSDave Kleikamp 2419617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 2420ac27a0ecSDave Kleikamp } else { 2421ac27a0ecSDave Kleikamp __le32 ret; 2422617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2423617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 2424617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2425ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 2426ac27a0ecSDave Kleikamp "optional features (%x).\n", 2427ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(ret)); 2428ac27a0ecSDave Kleikamp err = -EROFS; 2429ac27a0ecSDave Kleikamp goto restore_opts; 2430ac27a0ecSDave Kleikamp } 2431ead6596bSEric Sandeen 2432ead6596bSEric Sandeen /* 2433ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 2434ead6596bSEric Sandeen * around from a previously readonly bdev mount, 2435ead6596bSEric Sandeen * require a full umount/remount for now. 2436ead6596bSEric Sandeen */ 2437ead6596bSEric Sandeen if (es->s_last_orphan) { 2438ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 2439ead6596bSEric Sandeen "remount RDWR because of unprocessed " 2440ead6596bSEric Sandeen "orphan inode list. Please " 2441ead6596bSEric Sandeen "umount/remount instead.\n", 2442ead6596bSEric Sandeen sb->s_id); 2443ead6596bSEric Sandeen err = -EINVAL; 2444ead6596bSEric Sandeen goto restore_opts; 2445ead6596bSEric Sandeen } 2446ead6596bSEric Sandeen 2447ac27a0ecSDave Kleikamp /* 2448ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 2449ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 2450ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 2451ac27a0ecSDave Kleikamp * the partition.) 2452ac27a0ecSDave Kleikamp */ 2453617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2454ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2455617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 2456ac27a0ecSDave Kleikamp goto restore_opts; 2457617ba13bSMingming Cao if (!ext4_setup_super (sb, es, 0)) 2458ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2459ac27a0ecSDave Kleikamp } 2460ac27a0ecSDave Kleikamp } 2461ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2462ac27a0ecSDave Kleikamp /* Release old quota file names */ 2463ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2464ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 2465ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 2466ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 2467ac27a0ecSDave Kleikamp #endif 2468ac27a0ecSDave Kleikamp return 0; 2469ac27a0ecSDave Kleikamp restore_opts: 2470ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 2471ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 2472ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 2473ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 2474ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 2475ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2476ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 2477ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2478ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 2479ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 2480ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2481ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 2482ac27a0ecSDave Kleikamp } 2483ac27a0ecSDave Kleikamp #endif 2484ac27a0ecSDave Kleikamp return err; 2485ac27a0ecSDave Kleikamp } 2486ac27a0ecSDave Kleikamp 2487617ba13bSMingming Cao static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) 2488ac27a0ecSDave Kleikamp { 2489ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 2490617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2491617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 2492617ba13bSMingming Cao ext4_fsblk_t overhead; 2493ac27a0ecSDave Kleikamp int i; 2494960cc398SPekka Enberg u64 fsid; 2495ac27a0ecSDave Kleikamp 2496ac27a0ecSDave Kleikamp if (test_opt (sb, MINIX_DF)) 2497ac27a0ecSDave Kleikamp overhead = 0; 2498ac27a0ecSDave Kleikamp else { 2499ac27a0ecSDave Kleikamp unsigned long ngroups; 2500617ba13bSMingming Cao ngroups = EXT4_SB(sb)->s_groups_count; 2501ac27a0ecSDave Kleikamp smp_rmb(); 2502ac27a0ecSDave Kleikamp 2503ac27a0ecSDave Kleikamp /* 2504ac27a0ecSDave Kleikamp * Compute the overhead (FS structures) 2505ac27a0ecSDave Kleikamp */ 2506ac27a0ecSDave Kleikamp 2507ac27a0ecSDave Kleikamp /* 2508ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 2509ac27a0ecSDave Kleikamp * overhead 2510ac27a0ecSDave Kleikamp */ 2511ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 2512ac27a0ecSDave Kleikamp 2513ac27a0ecSDave Kleikamp /* 2514ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 2515ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 2516ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 2517ac27a0ecSDave Kleikamp */ 2518ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 2519617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 2520617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 2521ac27a0ecSDave Kleikamp cond_resched(); 2522ac27a0ecSDave Kleikamp } 2523ac27a0ecSDave Kleikamp 2524ac27a0ecSDave Kleikamp /* 2525ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 2526ac27a0ecSDave Kleikamp * bitmap, and an inode table. 2527ac27a0ecSDave Kleikamp */ 2528617ba13bSMingming Cao overhead += (ngroups * (2 + EXT4_SB(sb)->s_itb_per_group)); 2529ac27a0ecSDave Kleikamp } 2530ac27a0ecSDave Kleikamp 2531617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 2532ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 2533bd81d8eeSLaurent Vivier buf->f_blocks = ext4_blocks_count(es) - overhead; 2534ac27a0ecSDave Kleikamp buf->f_bfree = percpu_counter_sum(&sbi->s_freeblocks_counter); 2535bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 2536bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 2537ac27a0ecSDave Kleikamp buf->f_bavail = 0; 2538ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 2539ac27a0ecSDave Kleikamp buf->f_ffree = percpu_counter_sum(&sbi->s_freeinodes_counter); 2540617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 2541960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 2542960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 2543960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 2544960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 2545ac27a0ecSDave Kleikamp return 0; 2546ac27a0ecSDave Kleikamp } 2547ac27a0ecSDave Kleikamp 2548ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 2549ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 2550ac27a0ecSDave Kleikamp * Process 1 Process 2 2551617ba13bSMingming Cao * ext4_create() quota_sync() 2552dab291afSMingming Cao * jbd2_journal_start() write_dquot() 2553ac27a0ecSDave Kleikamp * DQUOT_INIT() down(dqio_mutex) 2554dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 2555ac27a0ecSDave Kleikamp * 2556ac27a0ecSDave Kleikamp */ 2557ac27a0ecSDave Kleikamp 2558ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2559ac27a0ecSDave Kleikamp 2560ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 2561ac27a0ecSDave Kleikamp { 2562ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 2563ac27a0ecSDave Kleikamp } 2564ac27a0ecSDave Kleikamp 2565617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type) 2566ac27a0ecSDave Kleikamp { 2567ac27a0ecSDave Kleikamp handle_t *handle; 2568ac27a0ecSDave Kleikamp int ret, err; 2569ac27a0ecSDave Kleikamp 2570ac27a0ecSDave Kleikamp /* We may create quota structure so we need to reserve enough blocks */ 2571617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); 2572ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2573ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2574ac27a0ecSDave Kleikamp ret = dquot_initialize(inode, type); 2575617ba13bSMingming Cao err = ext4_journal_stop(handle); 2576ac27a0ecSDave Kleikamp if (!ret) 2577ac27a0ecSDave Kleikamp ret = err; 2578ac27a0ecSDave Kleikamp return ret; 2579ac27a0ecSDave Kleikamp } 2580ac27a0ecSDave Kleikamp 2581617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode) 2582ac27a0ecSDave Kleikamp { 2583ac27a0ecSDave Kleikamp handle_t *handle; 2584ac27a0ecSDave Kleikamp int ret, err; 2585ac27a0ecSDave Kleikamp 2586ac27a0ecSDave Kleikamp /* We may delete quota structure so we need to reserve enough blocks */ 2587617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); 2588ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2589ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2590ac27a0ecSDave Kleikamp ret = dquot_drop(inode); 2591617ba13bSMingming Cao err = ext4_journal_stop(handle); 2592ac27a0ecSDave Kleikamp if (!ret) 2593ac27a0ecSDave Kleikamp ret = err; 2594ac27a0ecSDave Kleikamp return ret; 2595ac27a0ecSDave Kleikamp } 2596ac27a0ecSDave Kleikamp 2597617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 2598ac27a0ecSDave Kleikamp { 2599ac27a0ecSDave Kleikamp int ret, err; 2600ac27a0ecSDave Kleikamp handle_t *handle; 2601ac27a0ecSDave Kleikamp struct inode *inode; 2602ac27a0ecSDave Kleikamp 2603ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 2604617ba13bSMingming Cao handle = ext4_journal_start(inode, 2605617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 2606ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2607ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2608ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 2609617ba13bSMingming Cao err = ext4_journal_stop(handle); 2610ac27a0ecSDave Kleikamp if (!ret) 2611ac27a0ecSDave Kleikamp ret = err; 2612ac27a0ecSDave Kleikamp return ret; 2613ac27a0ecSDave Kleikamp } 2614ac27a0ecSDave Kleikamp 2615617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 2616ac27a0ecSDave Kleikamp { 2617ac27a0ecSDave Kleikamp int ret, err; 2618ac27a0ecSDave Kleikamp handle_t *handle; 2619ac27a0ecSDave Kleikamp 2620617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 2621617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 2622ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2623ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2624ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 2625617ba13bSMingming Cao err = ext4_journal_stop(handle); 2626ac27a0ecSDave Kleikamp if (!ret) 2627ac27a0ecSDave Kleikamp ret = err; 2628ac27a0ecSDave Kleikamp return ret; 2629ac27a0ecSDave Kleikamp } 2630ac27a0ecSDave Kleikamp 2631617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 2632ac27a0ecSDave Kleikamp { 2633ac27a0ecSDave Kleikamp int ret, err; 2634ac27a0ecSDave Kleikamp handle_t *handle; 2635ac27a0ecSDave Kleikamp 2636617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 2637617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 2638ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2639ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2640ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 2641617ba13bSMingming Cao err = ext4_journal_stop(handle); 2642ac27a0ecSDave Kleikamp if (!ret) 2643ac27a0ecSDave Kleikamp ret = err; 2644ac27a0ecSDave Kleikamp return ret; 2645ac27a0ecSDave Kleikamp } 2646ac27a0ecSDave Kleikamp 2647617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 2648ac27a0ecSDave Kleikamp { 2649ac27a0ecSDave Kleikamp /* Are we journalling quotas? */ 2650617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 2651617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 2652ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 2653617ba13bSMingming Cao return ext4_write_dquot(dquot); 2654ac27a0ecSDave Kleikamp } else { 2655ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 2656ac27a0ecSDave Kleikamp } 2657ac27a0ecSDave Kleikamp } 2658ac27a0ecSDave Kleikamp 2659617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 2660ac27a0ecSDave Kleikamp { 2661ac27a0ecSDave Kleikamp int ret, err; 2662ac27a0ecSDave Kleikamp handle_t *handle; 2663ac27a0ecSDave Kleikamp 2664ac27a0ecSDave Kleikamp /* Data block + inode block */ 2665617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 2666ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 2667ac27a0ecSDave Kleikamp return PTR_ERR(handle); 2668ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 2669617ba13bSMingming Cao err = ext4_journal_stop(handle); 2670ac27a0ecSDave Kleikamp if (!ret) 2671ac27a0ecSDave Kleikamp ret = err; 2672ac27a0ecSDave Kleikamp return ret; 2673ac27a0ecSDave Kleikamp } 2674ac27a0ecSDave Kleikamp 2675ac27a0ecSDave Kleikamp /* 2676ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 2677ac27a0ecSDave Kleikamp * the quota file and such... 2678ac27a0ecSDave Kleikamp */ 2679617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 2680ac27a0ecSDave Kleikamp { 2681617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 2682617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 2683ac27a0ecSDave Kleikamp } 2684ac27a0ecSDave Kleikamp 2685ac27a0ecSDave Kleikamp /* 2686ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 2687ac27a0ecSDave Kleikamp */ 2688617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 2689ac27a0ecSDave Kleikamp char *path) 2690ac27a0ecSDave Kleikamp { 2691ac27a0ecSDave Kleikamp int err; 2692ac27a0ecSDave Kleikamp struct nameidata nd; 2693ac27a0ecSDave Kleikamp 2694ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 2695ac27a0ecSDave Kleikamp return -EINVAL; 2696ac27a0ecSDave Kleikamp /* Not journalling quota? */ 2697617ba13bSMingming Cao if (!EXT4_SB(sb)->s_qf_names[USRQUOTA] && 2698617ba13bSMingming Cao !EXT4_SB(sb)->s_qf_names[GRPQUOTA]) 2699ac27a0ecSDave Kleikamp return vfs_quota_on(sb, type, format_id, path); 2700ac27a0ecSDave Kleikamp err = path_lookup(path, LOOKUP_FOLLOW, &nd); 2701ac27a0ecSDave Kleikamp if (err) 2702ac27a0ecSDave Kleikamp return err; 2703ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 2704ac27a0ecSDave Kleikamp if (nd.mnt->mnt_sb != sb) { 2705ac27a0ecSDave Kleikamp path_release(&nd); 2706ac27a0ecSDave Kleikamp return -EXDEV; 2707ac27a0ecSDave Kleikamp } 2708ac27a0ecSDave Kleikamp /* Quotafile not of fs root? */ 2709ac27a0ecSDave Kleikamp if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode) 2710ac27a0ecSDave Kleikamp printk(KERN_WARNING 2711617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 2712ac27a0ecSDave Kleikamp "Journalled quota will not work.\n"); 2713ac27a0ecSDave Kleikamp path_release(&nd); 2714ac27a0ecSDave Kleikamp return vfs_quota_on(sb, type, format_id, path); 2715ac27a0ecSDave Kleikamp } 2716ac27a0ecSDave Kleikamp 2717ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 2718ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 2719ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 2720ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 2721617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 2722ac27a0ecSDave Kleikamp size_t len, loff_t off) 2723ac27a0ecSDave Kleikamp { 2724ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 2725617ba13bSMingming Cao sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 2726ac27a0ecSDave Kleikamp int err = 0; 2727ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 2728ac27a0ecSDave Kleikamp int tocopy; 2729ac27a0ecSDave Kleikamp size_t toread; 2730ac27a0ecSDave Kleikamp struct buffer_head *bh; 2731ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 2732ac27a0ecSDave Kleikamp 2733ac27a0ecSDave Kleikamp if (off > i_size) 2734ac27a0ecSDave Kleikamp return 0; 2735ac27a0ecSDave Kleikamp if (off+len > i_size) 2736ac27a0ecSDave Kleikamp len = i_size-off; 2737ac27a0ecSDave Kleikamp toread = len; 2738ac27a0ecSDave Kleikamp while (toread > 0) { 2739ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 2740ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 2741617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 2742ac27a0ecSDave Kleikamp if (err) 2743ac27a0ecSDave Kleikamp return err; 2744ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 2745ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 2746ac27a0ecSDave Kleikamp else 2747ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 2748ac27a0ecSDave Kleikamp brelse(bh); 2749ac27a0ecSDave Kleikamp offset = 0; 2750ac27a0ecSDave Kleikamp toread -= tocopy; 2751ac27a0ecSDave Kleikamp data += tocopy; 2752ac27a0ecSDave Kleikamp blk++; 2753ac27a0ecSDave Kleikamp } 2754ac27a0ecSDave Kleikamp return len; 2755ac27a0ecSDave Kleikamp } 2756ac27a0ecSDave Kleikamp 2757ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 2758ac27a0ecSDave Kleikamp * enough credits) */ 2759617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 2760ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 2761ac27a0ecSDave Kleikamp { 2762ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 2763617ba13bSMingming Cao sector_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 2764ac27a0ecSDave Kleikamp int err = 0; 2765ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 2766ac27a0ecSDave Kleikamp int tocopy; 2767617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 2768ac27a0ecSDave Kleikamp size_t towrite = len; 2769ac27a0ecSDave Kleikamp struct buffer_head *bh; 2770ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 2771ac27a0ecSDave Kleikamp 2772ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 2773ac27a0ecSDave Kleikamp while (towrite > 0) { 2774ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 2775ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 2776617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 2777ac27a0ecSDave Kleikamp if (!bh) 2778ac27a0ecSDave Kleikamp goto out; 2779ac27a0ecSDave Kleikamp if (journal_quota) { 2780617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 2781ac27a0ecSDave Kleikamp if (err) { 2782ac27a0ecSDave Kleikamp brelse(bh); 2783ac27a0ecSDave Kleikamp goto out; 2784ac27a0ecSDave Kleikamp } 2785ac27a0ecSDave Kleikamp } 2786ac27a0ecSDave Kleikamp lock_buffer(bh); 2787ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 2788ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 2789ac27a0ecSDave Kleikamp unlock_buffer(bh); 2790ac27a0ecSDave Kleikamp if (journal_quota) 2791617ba13bSMingming Cao err = ext4_journal_dirty_metadata(handle, bh); 2792ac27a0ecSDave Kleikamp else { 2793ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 2794617ba13bSMingming Cao err = ext4_journal_dirty_data(handle, bh); 2795ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 2796ac27a0ecSDave Kleikamp } 2797ac27a0ecSDave Kleikamp brelse(bh); 2798ac27a0ecSDave Kleikamp if (err) 2799ac27a0ecSDave Kleikamp goto out; 2800ac27a0ecSDave Kleikamp offset = 0; 2801ac27a0ecSDave Kleikamp towrite -= tocopy; 2802ac27a0ecSDave Kleikamp data += tocopy; 2803ac27a0ecSDave Kleikamp blk++; 2804ac27a0ecSDave Kleikamp } 2805ac27a0ecSDave Kleikamp out: 2806ac27a0ecSDave Kleikamp if (len == towrite) 2807ac27a0ecSDave Kleikamp return err; 2808ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 2809ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 2810617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 2811ac27a0ecSDave Kleikamp } 2812ac27a0ecSDave Kleikamp inode->i_version++; 2813ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 2814617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 2815ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 2816ac27a0ecSDave Kleikamp return len - towrite; 2817ac27a0ecSDave Kleikamp } 2818ac27a0ecSDave Kleikamp 2819ac27a0ecSDave Kleikamp #endif 2820ac27a0ecSDave Kleikamp 2821617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 2822ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 2823ac27a0ecSDave Kleikamp { 2824617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 2825ac27a0ecSDave Kleikamp } 2826ac27a0ecSDave Kleikamp 2827617ba13bSMingming Cao static struct file_system_type ext4dev_fs_type = { 2828ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 2829617ba13bSMingming Cao .name = "ext4dev", 2830617ba13bSMingming Cao .get_sb = ext4_get_sb, 2831ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 2832ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 2833ac27a0ecSDave Kleikamp }; 2834ac27a0ecSDave Kleikamp 2835617ba13bSMingming Cao static int __init init_ext4_fs(void) 2836ac27a0ecSDave Kleikamp { 2837617ba13bSMingming Cao int err = init_ext4_xattr(); 2838ac27a0ecSDave Kleikamp if (err) 2839ac27a0ecSDave Kleikamp return err; 2840ac27a0ecSDave Kleikamp err = init_inodecache(); 2841ac27a0ecSDave Kleikamp if (err) 2842ac27a0ecSDave Kleikamp goto out1; 2843617ba13bSMingming Cao err = register_filesystem(&ext4dev_fs_type); 2844ac27a0ecSDave Kleikamp if (err) 2845ac27a0ecSDave Kleikamp goto out; 2846ac27a0ecSDave Kleikamp return 0; 2847ac27a0ecSDave Kleikamp out: 2848ac27a0ecSDave Kleikamp destroy_inodecache(); 2849ac27a0ecSDave Kleikamp out1: 2850617ba13bSMingming Cao exit_ext4_xattr(); 2851ac27a0ecSDave Kleikamp return err; 2852ac27a0ecSDave Kleikamp } 2853ac27a0ecSDave Kleikamp 2854617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 2855ac27a0ecSDave Kleikamp { 2856617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 2857ac27a0ecSDave Kleikamp destroy_inodecache(); 2858617ba13bSMingming Cao exit_ext4_xattr(); 2859ac27a0ecSDave Kleikamp } 2860ac27a0ecSDave Kleikamp 2861ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 2862617ba13bSMingming Cao MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); 2863ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 2864617ba13bSMingming Cao module_init(init_ext4_fs) 2865617ba13bSMingming Cao module_exit(exit_ext4_fs) 2866