1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23dab291afSMingming Cao #include <linux/jbd2.h> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 27ac27a0ecSDave Kleikamp #include <linux/parser.h> 28ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 38ede86cc4STheodore Ts'o #include <linux/marker.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 433dcf5451SChristoph Hellwig #include "ext4.h" 443dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 45ac27a0ecSDave Kleikamp #include "xattr.h" 46ac27a0ecSDave Kleikamp #include "acl.h" 47ac27a0ecSDave Kleikamp #include "namei.h" 48717d50e4SAndreas Dilger #include "group.h" 49ac27a0ecSDave Kleikamp 509f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 519f6200bbSTheodore Ts'o 52617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 53ac27a0ecSDave Kleikamp unsigned long journal_devnum); 54617ba13bSMingming Cao static int ext4_create_journal(struct super_block *, struct ext4_super_block *, 55ac27a0ecSDave Kleikamp unsigned int); 56617ba13bSMingming Cao static void ext4_commit_super(struct super_block *sb, 572b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync); 58617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 59617ba13bSMingming Cao struct ext4_super_block *es); 60617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 61617ba13bSMingming Cao struct ext4_super_block *es); 62617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 63617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 64ac27a0ecSDave Kleikamp char nbuf[16]); 65617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 66617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 67617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb); 68617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 69617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb); 70ac27a0ecSDave Kleikamp 71bd81d8eeSLaurent Vivier 728fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 738fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 74bd81d8eeSLaurent Vivier { 753a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 768fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 778fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 78bd81d8eeSLaurent Vivier } 79bd81d8eeSLaurent Vivier 808fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 818fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 82bd81d8eeSLaurent Vivier { 835272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 848fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 858fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 86bd81d8eeSLaurent Vivier } 87bd81d8eeSLaurent Vivier 888fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 898fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 90bd81d8eeSLaurent Vivier { 915272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 928fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 938fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 94bd81d8eeSLaurent Vivier } 95bd81d8eeSLaurent Vivier 968fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 978fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 98bd81d8eeSLaurent Vivier { 993a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1008fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1018fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 102bd81d8eeSLaurent Vivier } 103bd81d8eeSLaurent Vivier 1048fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1058fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 106bd81d8eeSLaurent Vivier { 1075272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1088fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1098fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 110bd81d8eeSLaurent Vivier } 111bd81d8eeSLaurent Vivier 1128fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1138fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 114bd81d8eeSLaurent Vivier { 1155272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1168fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1178fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 118bd81d8eeSLaurent Vivier } 119bd81d8eeSLaurent Vivier 120ac27a0ecSDave Kleikamp /* 121dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 122ac27a0ecSDave Kleikamp * 123ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 124ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 125ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 126ac27a0ecSDave Kleikamp * appropriate. 127ac27a0ecSDave Kleikamp */ 128617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 129ac27a0ecSDave Kleikamp { 130ac27a0ecSDave Kleikamp journal_t *journal; 131ac27a0ecSDave Kleikamp 132ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 133ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 134ac27a0ecSDave Kleikamp 135ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 136ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 137ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 138617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 139ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 14046e665e9SHarvey Harrison ext4_abort(sb, __func__, 141ac27a0ecSDave Kleikamp "Detected aborted journal"); 142ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 143ac27a0ecSDave Kleikamp } 144ac27a0ecSDave Kleikamp 145dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 146ac27a0ecSDave Kleikamp } 147ac27a0ecSDave Kleikamp 148ac27a0ecSDave Kleikamp /* 149ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 150dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 151ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 152ac27a0ecSDave Kleikamp * appropriate. 153ac27a0ecSDave Kleikamp */ 154617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 155ac27a0ecSDave Kleikamp { 156ac27a0ecSDave Kleikamp struct super_block *sb; 157ac27a0ecSDave Kleikamp int err; 158ac27a0ecSDave Kleikamp int rc; 159ac27a0ecSDave Kleikamp 160ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 161ac27a0ecSDave Kleikamp err = handle->h_err; 162dab291afSMingming Cao rc = jbd2_journal_stop(handle); 163ac27a0ecSDave Kleikamp 164ac27a0ecSDave Kleikamp if (!err) 165ac27a0ecSDave Kleikamp err = rc; 166ac27a0ecSDave Kleikamp if (err) 167617ba13bSMingming Cao __ext4_std_error(sb, where, err); 168ac27a0ecSDave Kleikamp return err; 169ac27a0ecSDave Kleikamp } 170ac27a0ecSDave Kleikamp 171617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 172ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 173ac27a0ecSDave Kleikamp { 174ac27a0ecSDave Kleikamp char nbuf[16]; 175617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 176ac27a0ecSDave Kleikamp 177ac27a0ecSDave Kleikamp if (bh) 178ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 179ac27a0ecSDave Kleikamp 180ac27a0ecSDave Kleikamp if (!handle->h_err) 181ac27a0ecSDave Kleikamp handle->h_err = err; 182ac27a0ecSDave Kleikamp 183ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 184ac27a0ecSDave Kleikamp return; 185ac27a0ecSDave Kleikamp 186ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 187ac27a0ecSDave Kleikamp caller, errstr, err_fn); 188ac27a0ecSDave Kleikamp 189dab291afSMingming Cao jbd2_journal_abort_handle(handle); 190ac27a0ecSDave Kleikamp } 191ac27a0ecSDave Kleikamp 192ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 193ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 194ac27a0ecSDave Kleikamp * 195ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 196617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 197ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 198ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 199ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 200ac27a0ecSDave Kleikamp * write out the superblock safely. 201ac27a0ecSDave Kleikamp * 202dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 203ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 204ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 205ac27a0ecSDave Kleikamp */ 206ac27a0ecSDave Kleikamp 207617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 208ac27a0ecSDave Kleikamp { 209617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 210ac27a0ecSDave Kleikamp 211617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 212617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 213ac27a0ecSDave Kleikamp 214ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 215ac27a0ecSDave Kleikamp return; 216ac27a0ecSDave Kleikamp 217ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 218617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 219ac27a0ecSDave Kleikamp 220617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 221ac27a0ecSDave Kleikamp if (journal) 222dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 223ac27a0ecSDave Kleikamp } 224ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 225ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 226ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 227ac27a0ecSDave Kleikamp } 228617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 229ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 230617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 231ac27a0ecSDave Kleikamp sb->s_id); 232ac27a0ecSDave Kleikamp } 233ac27a0ecSDave Kleikamp 234617ba13bSMingming Cao void ext4_error(struct super_block *sb, const char *function, 235ac27a0ecSDave Kleikamp const char *fmt, ...) 236ac27a0ecSDave Kleikamp { 237ac27a0ecSDave Kleikamp va_list args; 238ac27a0ecSDave Kleikamp 239ac27a0ecSDave Kleikamp va_start(args, fmt); 240617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 241ac27a0ecSDave Kleikamp vprintk(fmt, args); 242ac27a0ecSDave Kleikamp printk("\n"); 243ac27a0ecSDave Kleikamp va_end(args); 244ac27a0ecSDave Kleikamp 245617ba13bSMingming Cao ext4_handle_error(sb); 246ac27a0ecSDave Kleikamp } 247ac27a0ecSDave Kleikamp 248617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 249ac27a0ecSDave Kleikamp char nbuf[16]) 250ac27a0ecSDave Kleikamp { 251ac27a0ecSDave Kleikamp char *errstr = NULL; 252ac27a0ecSDave Kleikamp 253ac27a0ecSDave Kleikamp switch (errno) { 254ac27a0ecSDave Kleikamp case -EIO: 255ac27a0ecSDave Kleikamp errstr = "IO failure"; 256ac27a0ecSDave Kleikamp break; 257ac27a0ecSDave Kleikamp case -ENOMEM: 258ac27a0ecSDave Kleikamp errstr = "Out of memory"; 259ac27a0ecSDave Kleikamp break; 260ac27a0ecSDave Kleikamp case -EROFS: 261dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 262ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 263ac27a0ecSDave Kleikamp else 264ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 265ac27a0ecSDave Kleikamp break; 266ac27a0ecSDave Kleikamp default: 267ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 268ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 269ac27a0ecSDave Kleikamp * NULL. */ 270ac27a0ecSDave Kleikamp if (nbuf) { 271ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 272ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 273ac27a0ecSDave Kleikamp errstr = nbuf; 274ac27a0ecSDave Kleikamp } 275ac27a0ecSDave Kleikamp break; 276ac27a0ecSDave Kleikamp } 277ac27a0ecSDave Kleikamp 278ac27a0ecSDave Kleikamp return errstr; 279ac27a0ecSDave Kleikamp } 280ac27a0ecSDave Kleikamp 281617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 282ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 283ac27a0ecSDave Kleikamp 2842b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 285ac27a0ecSDave Kleikamp { 286ac27a0ecSDave Kleikamp char nbuf[16]; 287ac27a0ecSDave Kleikamp const char *errstr; 288ac27a0ecSDave Kleikamp 289ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 290ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 291ac27a0ecSDave Kleikamp * an error. */ 292ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 293ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 294ac27a0ecSDave Kleikamp return; 295ac27a0ecSDave Kleikamp 296617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 297617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 298ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 299ac27a0ecSDave Kleikamp 300617ba13bSMingming Cao ext4_handle_error(sb); 301ac27a0ecSDave Kleikamp } 302ac27a0ecSDave Kleikamp 303ac27a0ecSDave Kleikamp /* 304617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 305ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 306ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 307ac27a0ecSDave Kleikamp * 308ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 309ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 310ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 311ac27a0ecSDave Kleikamp */ 312ac27a0ecSDave Kleikamp 313617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 314ac27a0ecSDave Kleikamp const char *fmt, ...) 315ac27a0ecSDave Kleikamp { 316ac27a0ecSDave Kleikamp va_list args; 317ac27a0ecSDave Kleikamp 318617ba13bSMingming Cao printk(KERN_CRIT "ext4_abort called.\n"); 319ac27a0ecSDave Kleikamp 320ac27a0ecSDave Kleikamp va_start(args, fmt); 321617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 322ac27a0ecSDave Kleikamp vprintk(fmt, args); 323ac27a0ecSDave Kleikamp printk("\n"); 324ac27a0ecSDave Kleikamp va_end(args); 325ac27a0ecSDave Kleikamp 326ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 327617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 328ac27a0ecSDave Kleikamp 329ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 330ac27a0ecSDave Kleikamp return; 331ac27a0ecSDave Kleikamp 332ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 333617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 334ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 335617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 336dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 337ac27a0ecSDave Kleikamp } 338ac27a0ecSDave Kleikamp 339617ba13bSMingming Cao void ext4_warning(struct super_block *sb, const char *function, 340ac27a0ecSDave Kleikamp const char *fmt, ...) 341ac27a0ecSDave Kleikamp { 342ac27a0ecSDave Kleikamp va_list args; 343ac27a0ecSDave Kleikamp 344ac27a0ecSDave Kleikamp va_start(args, fmt); 345617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 346ac27a0ecSDave Kleikamp sb->s_id, function); 347ac27a0ecSDave Kleikamp vprintk(fmt, args); 348ac27a0ecSDave Kleikamp printk("\n"); 349ac27a0ecSDave Kleikamp va_end(args); 350ac27a0ecSDave Kleikamp } 351ac27a0ecSDave Kleikamp 352617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 353ac27a0ecSDave Kleikamp { 354617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 355ac27a0ecSDave Kleikamp 356617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 357ac27a0ecSDave Kleikamp return; 358ac27a0ecSDave Kleikamp 35946e665e9SHarvey Harrison ext4_warning(sb, __func__, 360ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 361ac27a0ecSDave Kleikamp "running e2fsck is recommended", 362617ba13bSMingming Cao EXT4_DYNAMIC_REV); 363ac27a0ecSDave Kleikamp 364617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 365617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 366617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 367ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 368ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 369ac27a0ecSDave Kleikamp 370ac27a0ecSDave Kleikamp /* 371ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 372ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 373ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 374ac27a0ecSDave Kleikamp */ 375ac27a0ecSDave Kleikamp } 376ac27a0ecSDave Kleikamp 37799e6f829SAneesh Kumar K.V int ext4_update_compat_feature(handle_t *handle, 37899e6f829SAneesh Kumar K.V struct super_block *sb, __u32 compat) 37999e6f829SAneesh Kumar K.V { 38099e6f829SAneesh Kumar K.V int err = 0; 38199e6f829SAneesh Kumar K.V if (!EXT4_HAS_COMPAT_FEATURE(sb, compat)) { 38299e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 38399e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 38499e6f829SAneesh Kumar K.V if (err) 38599e6f829SAneesh Kumar K.V return err; 38699e6f829SAneesh Kumar K.V EXT4_SET_COMPAT_FEATURE(sb, compat); 38799e6f829SAneesh Kumar K.V sb->s_dirt = 1; 38899e6f829SAneesh Kumar K.V handle->h_sync = 1; 38999e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 39099e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 39199e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 39299e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 39399e6f829SAneesh Kumar K.V } 39499e6f829SAneesh Kumar K.V return err; 39599e6f829SAneesh Kumar K.V } 39699e6f829SAneesh Kumar K.V 39799e6f829SAneesh Kumar K.V int ext4_update_rocompat_feature(handle_t *handle, 39899e6f829SAneesh Kumar K.V struct super_block *sb, __u32 rocompat) 39999e6f829SAneesh Kumar K.V { 40099e6f829SAneesh Kumar K.V int err = 0; 40199e6f829SAneesh Kumar K.V if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, rocompat)) { 40299e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 40399e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 40499e6f829SAneesh Kumar K.V if (err) 40599e6f829SAneesh Kumar K.V return err; 40699e6f829SAneesh Kumar K.V EXT4_SET_RO_COMPAT_FEATURE(sb, rocompat); 40799e6f829SAneesh Kumar K.V sb->s_dirt = 1; 40899e6f829SAneesh Kumar K.V handle->h_sync = 1; 40999e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 41099e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 41199e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 41299e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 41399e6f829SAneesh Kumar K.V } 41499e6f829SAneesh Kumar K.V return err; 41599e6f829SAneesh Kumar K.V } 41699e6f829SAneesh Kumar K.V 41799e6f829SAneesh Kumar K.V int ext4_update_incompat_feature(handle_t *handle, 41899e6f829SAneesh Kumar K.V struct super_block *sb, __u32 incompat) 41999e6f829SAneesh Kumar K.V { 42099e6f829SAneesh Kumar K.V int err = 0; 42199e6f829SAneesh Kumar K.V if (!EXT4_HAS_INCOMPAT_FEATURE(sb, incompat)) { 42299e6f829SAneesh Kumar K.V err = ext4_journal_get_write_access(handle, 42399e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 42499e6f829SAneesh Kumar K.V if (err) 42599e6f829SAneesh Kumar K.V return err; 42699e6f829SAneesh Kumar K.V EXT4_SET_INCOMPAT_FEATURE(sb, incompat); 42799e6f829SAneesh Kumar K.V sb->s_dirt = 1; 42899e6f829SAneesh Kumar K.V handle->h_sync = 1; 42999e6f829SAneesh Kumar K.V BUFFER_TRACE(EXT4_SB(sb)->s_sbh, 43099e6f829SAneesh Kumar K.V "call ext4_journal_dirty_met adata"); 43199e6f829SAneesh Kumar K.V err = ext4_journal_dirty_metadata(handle, 43299e6f829SAneesh Kumar K.V EXT4_SB(sb)->s_sbh); 43399e6f829SAneesh Kumar K.V } 43499e6f829SAneesh Kumar K.V return err; 43599e6f829SAneesh Kumar K.V } 43699e6f829SAneesh Kumar K.V 437ac27a0ecSDave Kleikamp /* 438ac27a0ecSDave Kleikamp * Open the external journal device 439ac27a0ecSDave Kleikamp */ 440617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 441ac27a0ecSDave Kleikamp { 442ac27a0ecSDave Kleikamp struct block_device *bdev; 443ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 444ac27a0ecSDave Kleikamp 445ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 446ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 447ac27a0ecSDave Kleikamp goto fail; 448ac27a0ecSDave Kleikamp return bdev; 449ac27a0ecSDave Kleikamp 450ac27a0ecSDave Kleikamp fail: 451617ba13bSMingming Cao printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", 452ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 453ac27a0ecSDave Kleikamp return NULL; 454ac27a0ecSDave Kleikamp } 455ac27a0ecSDave Kleikamp 456ac27a0ecSDave Kleikamp /* 457ac27a0ecSDave Kleikamp * Release the journal device 458ac27a0ecSDave Kleikamp */ 459617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 460ac27a0ecSDave Kleikamp { 461ac27a0ecSDave Kleikamp bd_release(bdev); 462ac27a0ecSDave Kleikamp return blkdev_put(bdev); 463ac27a0ecSDave Kleikamp } 464ac27a0ecSDave Kleikamp 465617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 466ac27a0ecSDave Kleikamp { 467ac27a0ecSDave Kleikamp struct block_device *bdev; 468ac27a0ecSDave Kleikamp int ret = -ENODEV; 469ac27a0ecSDave Kleikamp 470ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 471ac27a0ecSDave Kleikamp if (bdev) { 472617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 473ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 474ac27a0ecSDave Kleikamp } 475ac27a0ecSDave Kleikamp return ret; 476ac27a0ecSDave Kleikamp } 477ac27a0ecSDave Kleikamp 478ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 479ac27a0ecSDave Kleikamp { 480617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 481ac27a0ecSDave Kleikamp } 482ac27a0ecSDave Kleikamp 483617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 484ac27a0ecSDave Kleikamp { 485ac27a0ecSDave Kleikamp struct list_head *l; 486ac27a0ecSDave Kleikamp 487ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 488ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 489ac27a0ecSDave Kleikamp 490ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 491ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 492ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 493ac27a0ecSDave Kleikamp printk(KERN_ERR " " 494ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 495ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 496ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 497ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 498ac27a0ecSDave Kleikamp } 499ac27a0ecSDave Kleikamp } 500ac27a0ecSDave Kleikamp 501617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 502ac27a0ecSDave Kleikamp { 503617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 504617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 505ac27a0ecSDave Kleikamp int i; 506ac27a0ecSDave Kleikamp 507c9de560dSAlex Tomas ext4_mb_release(sb); 508a86c6181SAlex Tomas ext4_ext_release(sb); 509617ba13bSMingming Cao ext4_xattr_put_super(sb); 510dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 51147b4a50bSJan Kara sbi->s_journal = NULL; 512ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 513617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 514ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 515617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 516ac27a0ecSDave Kleikamp } 517240799cdSTheodore Ts'o if (sbi->s_proc) { 518240799cdSTheodore Ts'o remove_proc_entry("inode_readahead_blks", sbi->s_proc); 5199f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 520240799cdSTheodore Ts'o } 521ac27a0ecSDave Kleikamp 522ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 523ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 524ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 525772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 526ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 527ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 528ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 5296bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 530ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 531ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 532ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 533ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 534ac27a0ecSDave Kleikamp #endif 535ac27a0ecSDave Kleikamp 536ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 537ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 538ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 539ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 540ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 541ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 542ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 543ac27a0ecSDave Kleikamp 544f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 545ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 546ac27a0ecSDave Kleikamp /* 547ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 548ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 549ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 550ac27a0ecSDave Kleikamp */ 551ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 552f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 553617ba13bSMingming Cao ext4_blkdev_remove(sbi); 554ac27a0ecSDave Kleikamp } 555ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 556ac27a0ecSDave Kleikamp kfree(sbi); 557ac27a0ecSDave Kleikamp return; 558ac27a0ecSDave Kleikamp } 559ac27a0ecSDave Kleikamp 560e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 561ac27a0ecSDave Kleikamp 562ac27a0ecSDave Kleikamp /* 563ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 564ac27a0ecSDave Kleikamp */ 565617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 566ac27a0ecSDave Kleikamp { 567617ba13bSMingming Cao struct ext4_inode_info *ei; 568ac27a0ecSDave Kleikamp 569e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 570ac27a0ecSDave Kleikamp if (!ei) 571ac27a0ecSDave Kleikamp return NULL; 572*03010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 573617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 574617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 575ac27a0ecSDave Kleikamp #endif 576ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 57791246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 578a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 579c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 580c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 581678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 582d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 583d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 584d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 585d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 586d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 587ac27a0ecSDave Kleikamp return &ei->vfs_inode; 588ac27a0ecSDave Kleikamp } 589ac27a0ecSDave Kleikamp 590617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 591ac27a0ecSDave Kleikamp { 5929f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 5939f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 5949f7dd93dSVasily Averin EXT4_I(inode)); 5959f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 5969f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 5979f7dd93dSVasily Averin true); 5989f7dd93dSVasily Averin dump_stack(); 5999f7dd93dSVasily Averin } 600617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 601ac27a0ecSDave Kleikamp } 602ac27a0ecSDave Kleikamp 60351cc5068SAlexey Dobriyan static void init_once(void *foo) 604ac27a0ecSDave Kleikamp { 605617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 606ac27a0ecSDave Kleikamp 607ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 608*03010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 609ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 610ac27a0ecSDave Kleikamp #endif 6110e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 612ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 613ac27a0ecSDave Kleikamp } 614ac27a0ecSDave Kleikamp 615ac27a0ecSDave Kleikamp static int init_inodecache(void) 616ac27a0ecSDave Kleikamp { 617617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 618617ba13bSMingming Cao sizeof(struct ext4_inode_info), 619ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 620ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 62120c2df83SPaul Mundt init_once); 622617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 623ac27a0ecSDave Kleikamp return -ENOMEM; 624ac27a0ecSDave Kleikamp return 0; 625ac27a0ecSDave Kleikamp } 626ac27a0ecSDave Kleikamp 627ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 628ac27a0ecSDave Kleikamp { 629617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 630ac27a0ecSDave Kleikamp } 631ac27a0ecSDave Kleikamp 632617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 633ac27a0ecSDave Kleikamp { 634*03010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 635617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 636617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 637617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 638617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 639ac27a0ecSDave Kleikamp } 640617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 641617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 642617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 643617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 644ac27a0ecSDave Kleikamp } 645ac27a0ecSDave Kleikamp #endif 646c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 647678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 648678aaf48SJan Kara &EXT4_I(inode)->jinode); 649ac27a0ecSDave Kleikamp } 650ac27a0ecSDave Kleikamp 6512b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 6522b2d6d01STheodore Ts'o struct super_block *sb) 653ac27a0ecSDave Kleikamp { 654ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 655617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 656ac27a0ecSDave Kleikamp 657ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 658ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 659ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); 660ac27a0ecSDave Kleikamp 661ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 662ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 663ac27a0ecSDave Kleikamp 664ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 665ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 666ac27a0ecSDave Kleikamp 667617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 668ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 669ac27a0ecSDave Kleikamp 670617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 671ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 672ac27a0ecSDave Kleikamp #endif 673ac27a0ecSDave Kleikamp } 674ac27a0ecSDave Kleikamp 675d9c9bef1SMiklos Szeredi /* 676d9c9bef1SMiklos Szeredi * Show an option if 677d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 678d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 679d9c9bef1SMiklos Szeredi */ 680617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 681ac27a0ecSDave Kleikamp { 682aa22df2cSAneesh Kumar K.V int def_errors; 683aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 684ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 685d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 686d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 687d9c9bef1SMiklos Szeredi 688d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 689aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 690d9c9bef1SMiklos Szeredi 691d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 692d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 693d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 694d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 695aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 696d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 697d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 698d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 699d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 700d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 701d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 702d9c9bef1SMiklos Szeredi } 703d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 704d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 705d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 706d9c9bef1SMiklos Szeredi } 707bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 708d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 709bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 710d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 711bb4f397aSAneesh Kumar K.V } 712bb4f397aSAneesh Kumar K.V } 713aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 714bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 715aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 716d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 717aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 718d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 719aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 720d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 721d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 722d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 723*03010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 724aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 725aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 726d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 727d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 728d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 729d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 730d9c9bef1SMiklos Szeredi } 731d9c9bef1SMiklos Szeredi #endif 732*03010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 733aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 734d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 735d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 736d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 737d9c9bef1SMiklos Szeredi #endif 738d9c9bef1SMiklos Szeredi if (!test_opt(sb, RESERVATION)) 739d9c9bef1SMiklos Szeredi seq_puts(seq, ",noreservation"); 740d9c9bef1SMiklos Szeredi if (sbi->s_commit_interval) { 741d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 742d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 743d9c9bef1SMiklos Szeredi } 744571640caSEric Sandeen /* 745571640caSEric Sandeen * We're changing the default of barrier mount option, so 746571640caSEric Sandeen * let's always display its mount state so it's clear what its 747571640caSEric Sandeen * status is. 748571640caSEric Sandeen */ 749571640caSEric Sandeen seq_puts(seq, ",barrier="); 750571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 751cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 752cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 753d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 754d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 755d9c9bef1SMiklos Szeredi if (!test_opt(sb, EXTENTS)) 756d9c9bef1SMiklos Szeredi seq_puts(seq, ",noextents"); 75725ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 75825ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 759dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 760dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 761dd919b98SAneesh Kumar K.V 762ac27a0ecSDave Kleikamp 763cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 764cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 765aa22df2cSAneesh Kumar K.V /* 766aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 767aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 768aa22df2cSAneesh Kumar K.V */ 769617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 770ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 771617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 772ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 773617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 774ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 775ac27a0ecSDave Kleikamp 776240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 777240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 778240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 779240799cdSTheodore Ts'o 780617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 781ac27a0ecSDave Kleikamp return 0; 782ac27a0ecSDave Kleikamp } 783ac27a0ecSDave Kleikamp 784ac27a0ecSDave Kleikamp 7851b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 7861b961ac0SChristoph Hellwig u64 ino, u32 generation) 787ac27a0ecSDave Kleikamp { 788ac27a0ecSDave Kleikamp struct inode *inode; 789ac27a0ecSDave Kleikamp 790617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 791ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 792617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 793ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 794ac27a0ecSDave Kleikamp 795ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 796ac27a0ecSDave Kleikamp * 797617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 798ac27a0ecSDave Kleikamp * deleted, so we should be safe. 799ac27a0ecSDave Kleikamp * 800ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 801ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 802ac27a0ecSDave Kleikamp */ 8031d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 8041d1fe1eeSDavid Howells if (IS_ERR(inode)) 8051d1fe1eeSDavid Howells return ERR_CAST(inode); 8061d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 807ac27a0ecSDave Kleikamp iput(inode); 808ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 809ac27a0ecSDave Kleikamp } 8101b961ac0SChristoph Hellwig 8111b961ac0SChristoph Hellwig return inode; 812ac27a0ecSDave Kleikamp } 8131b961ac0SChristoph Hellwig 8141b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 8151b961ac0SChristoph Hellwig int fh_len, int fh_type) 8161b961ac0SChristoph Hellwig { 8171b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 8181b961ac0SChristoph Hellwig ext4_nfs_get_inode); 8191b961ac0SChristoph Hellwig } 8201b961ac0SChristoph Hellwig 8211b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 8221b961ac0SChristoph Hellwig int fh_len, int fh_type) 8231b961ac0SChristoph Hellwig { 8241b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 8251b961ac0SChristoph Hellwig ext4_nfs_get_inode); 826ac27a0ecSDave Kleikamp } 827ac27a0ecSDave Kleikamp 828ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 829ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 830ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 831ac27a0ecSDave Kleikamp 832617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type); 833617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode); 834617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 835617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 836617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 837617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 838617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 8396f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 8406f28e087SJan Kara char *path, int remount); 841617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 842617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 843ac27a0ecSDave Kleikamp size_t len, loff_t off); 844617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 845ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 846ac27a0ecSDave Kleikamp 847617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 848617ba13bSMingming Cao .initialize = ext4_dquot_initialize, 849617ba13bSMingming Cao .drop = ext4_dquot_drop, 850ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 851ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 852ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 853ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 854ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 855617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 856617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 857617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 858617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 859617ba13bSMingming Cao .write_info = ext4_write_info 860ac27a0ecSDave Kleikamp }; 861ac27a0ecSDave Kleikamp 862617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 863617ba13bSMingming Cao .quota_on = ext4_quota_on, 864ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 865ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 866ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 867ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 868ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 869ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 870ac27a0ecSDave Kleikamp }; 871ac27a0ecSDave Kleikamp #endif 872ac27a0ecSDave Kleikamp 873ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 874617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 875617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 876617ba13bSMingming Cao .write_inode = ext4_write_inode, 877617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 878617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 879617ba13bSMingming Cao .put_super = ext4_put_super, 880617ba13bSMingming Cao .write_super = ext4_write_super, 881617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 882617ba13bSMingming Cao .write_super_lockfs = ext4_write_super_lockfs, 883617ba13bSMingming Cao .unlockfs = ext4_unlockfs, 884617ba13bSMingming Cao .statfs = ext4_statfs, 885617ba13bSMingming Cao .remount_fs = ext4_remount, 886617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 887617ba13bSMingming Cao .show_options = ext4_show_options, 888ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 889617ba13bSMingming Cao .quota_read = ext4_quota_read, 890617ba13bSMingming Cao .quota_write = ext4_quota_write, 891ac27a0ecSDave Kleikamp #endif 892ac27a0ecSDave Kleikamp }; 893ac27a0ecSDave Kleikamp 89439655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 8951b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 8961b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 897617ba13bSMingming Cao .get_parent = ext4_get_parent, 898ac27a0ecSDave Kleikamp }; 899ac27a0ecSDave Kleikamp 900ac27a0ecSDave Kleikamp enum { 901ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 902ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 903ac27a0ecSDave Kleikamp Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, 904ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 905ac27a0ecSDave Kleikamp Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 906ac27a0ecSDave Kleikamp Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, 907818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 908ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 909ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 910ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 911ac27a0ecSDave Kleikamp Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 91225ec56b5SJean Noel Cordenner Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, 913dd919b98SAneesh Kumar K.V Opt_mballoc, Opt_nomballoc, Opt_stripe, Opt_delalloc, Opt_nodelalloc, 914240799cdSTheodore Ts'o Opt_inode_readahead_blks 915ac27a0ecSDave Kleikamp }; 916ac27a0ecSDave Kleikamp 917ac27a0ecSDave Kleikamp static match_table_t tokens = { 918ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 919ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 920ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 921ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 922ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 923ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 924ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 925ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 926ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 927ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 928ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 929ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 930ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 931ac27a0ecSDave Kleikamp {Opt_nocheck, "nocheck"}, 932ac27a0ecSDave Kleikamp {Opt_nocheck, "check=none"}, 933ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 934ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 935ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 936ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 937ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 938ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 939ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 940ac27a0ecSDave Kleikamp {Opt_reservation, "reservation"}, 941ac27a0ecSDave Kleikamp {Opt_noreservation, "noreservation"}, 942ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 943ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 944ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 945ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 946ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 947ac27a0ecSDave Kleikamp {Opt_journal_inum, "journal=%u"}, 948ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 949818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 950818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 951ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 952ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 953ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 954ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 955ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 956ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 957ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 958ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 959ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 960ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 961ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 962ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 963ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 964ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 965ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 966a86c6181SAlex Tomas {Opt_extents, "extents"}, 9671e2462f9SMingming Cao {Opt_noextents, "noextents"}, 96825ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 969c9de560dSAlex Tomas {Opt_mballoc, "mballoc"}, 970c9de560dSAlex Tomas {Opt_nomballoc, "nomballoc"}, 971c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 972ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 97364769240SAlex Tomas {Opt_delalloc, "delalloc"}, 974dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 975240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 976f3f12faaSJosef Bacik {Opt_err, NULL}, 977ac27a0ecSDave Kleikamp }; 978ac27a0ecSDave Kleikamp 979617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 980ac27a0ecSDave Kleikamp { 981617ba13bSMingming Cao ext4_fsblk_t sb_block; 982ac27a0ecSDave Kleikamp char *options = (char *) *data; 983ac27a0ecSDave Kleikamp 984ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 985ac27a0ecSDave Kleikamp return 1; /* Default location */ 986ac27a0ecSDave Kleikamp options += 3; 987617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 988ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 989ac27a0ecSDave Kleikamp if (*options && *options != ',') { 9904776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 991ac27a0ecSDave Kleikamp (char *) *data); 992ac27a0ecSDave Kleikamp return 1; 993ac27a0ecSDave Kleikamp } 994ac27a0ecSDave Kleikamp if (*options == ',') 995ac27a0ecSDave Kleikamp options++; 996ac27a0ecSDave Kleikamp *data = (void *) options; 997ac27a0ecSDave Kleikamp return sb_block; 998ac27a0ecSDave Kleikamp } 999ac27a0ecSDave Kleikamp 1000ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1001ac27a0ecSDave Kleikamp unsigned int *inum, unsigned long *journal_devnum, 1002617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1003ac27a0ecSDave Kleikamp { 1004617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1005ac27a0ecSDave Kleikamp char *p; 1006ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1007ac27a0ecSDave Kleikamp int data_opt = 0; 1008ac27a0ecSDave Kleikamp int option; 1009ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1010dfc5d03fSJan Kara int qtype, qfmt; 1011ac27a0ecSDave Kleikamp char *qname; 1012ac27a0ecSDave Kleikamp #endif 1013c07651b5SAneesh Kumar K.V ext4_fsblk_t last_block; 1014ac27a0ecSDave Kleikamp 1015ac27a0ecSDave Kleikamp if (!options) 1016ac27a0ecSDave Kleikamp return 1; 1017ac27a0ecSDave Kleikamp 1018ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1019ac27a0ecSDave Kleikamp int token; 1020ac27a0ecSDave Kleikamp if (!*p) 1021ac27a0ecSDave Kleikamp continue; 1022ac27a0ecSDave Kleikamp 1023ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1024ac27a0ecSDave Kleikamp switch (token) { 1025ac27a0ecSDave Kleikamp case Opt_bsd_df: 1026ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1027ac27a0ecSDave Kleikamp break; 1028ac27a0ecSDave Kleikamp case Opt_minix_df: 1029ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1030ac27a0ecSDave Kleikamp break; 1031ac27a0ecSDave Kleikamp case Opt_grpid: 1032ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1033ac27a0ecSDave Kleikamp break; 1034ac27a0ecSDave Kleikamp case Opt_nogrpid: 1035ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1036ac27a0ecSDave Kleikamp break; 1037ac27a0ecSDave Kleikamp case Opt_resuid: 1038ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1039ac27a0ecSDave Kleikamp return 0; 1040ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1041ac27a0ecSDave Kleikamp break; 1042ac27a0ecSDave Kleikamp case Opt_resgid: 1043ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1044ac27a0ecSDave Kleikamp return 0; 1045ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1046ac27a0ecSDave Kleikamp break; 1047ac27a0ecSDave Kleikamp case Opt_sb: 1048ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1049ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1050ac27a0ecSDave Kleikamp break; 1051ac27a0ecSDave Kleikamp case Opt_err_panic: 1052ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1053ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1054ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1055ac27a0ecSDave Kleikamp break; 1056ac27a0ecSDave Kleikamp case Opt_err_ro: 1057ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1058ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1059ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1060ac27a0ecSDave Kleikamp break; 1061ac27a0ecSDave Kleikamp case Opt_err_cont: 1062ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1063ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1064ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1065ac27a0ecSDave Kleikamp break; 1066ac27a0ecSDave Kleikamp case Opt_nouid32: 1067ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1068ac27a0ecSDave Kleikamp break; 1069ac27a0ecSDave Kleikamp case Opt_nocheck: 1070ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, CHECK); 1071ac27a0ecSDave Kleikamp break; 1072ac27a0ecSDave Kleikamp case Opt_debug: 1073ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1074ac27a0ecSDave Kleikamp break; 1075ac27a0ecSDave Kleikamp case Opt_oldalloc: 1076ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1077ac27a0ecSDave Kleikamp break; 1078ac27a0ecSDave Kleikamp case Opt_orlov: 1079ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1080ac27a0ecSDave Kleikamp break; 1081*03010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1082ac27a0ecSDave Kleikamp case Opt_user_xattr: 1083ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1084ac27a0ecSDave Kleikamp break; 1085ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1086ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1087ac27a0ecSDave Kleikamp break; 1088ac27a0ecSDave Kleikamp #else 1089ac27a0ecSDave Kleikamp case Opt_user_xattr: 1090ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 10914776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)user_xattr options " 10924776004fSTheodore Ts'o "not supported\n"); 1093ac27a0ecSDave Kleikamp break; 1094ac27a0ecSDave Kleikamp #endif 1095*03010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1096ac27a0ecSDave Kleikamp case Opt_acl: 1097ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1098ac27a0ecSDave Kleikamp break; 1099ac27a0ecSDave Kleikamp case Opt_noacl: 1100ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1101ac27a0ecSDave Kleikamp break; 1102ac27a0ecSDave Kleikamp #else 1103ac27a0ecSDave Kleikamp case Opt_acl: 1104ac27a0ecSDave Kleikamp case Opt_noacl: 11054776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)acl options " 11064776004fSTheodore Ts'o "not supported\n"); 1107ac27a0ecSDave Kleikamp break; 1108ac27a0ecSDave Kleikamp #endif 1109ac27a0ecSDave Kleikamp case Opt_reservation: 1110ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1111ac27a0ecSDave Kleikamp break; 1112ac27a0ecSDave Kleikamp case Opt_noreservation: 1113ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, RESERVATION); 1114ac27a0ecSDave Kleikamp break; 1115ac27a0ecSDave Kleikamp case Opt_journal_update: 1116ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1117ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1118ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1119ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1120ac27a0ecSDave Kleikamp journal file. */ 1121ac27a0ecSDave Kleikamp if (is_remount) { 1122617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1123ac27a0ecSDave Kleikamp "journal on remount\n"); 1124ac27a0ecSDave Kleikamp return 0; 1125ac27a0ecSDave Kleikamp } 1126ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1127ac27a0ecSDave Kleikamp break; 1128ac27a0ecSDave Kleikamp case Opt_journal_inum: 1129ac27a0ecSDave Kleikamp if (is_remount) { 1130617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1131ac27a0ecSDave Kleikamp "journal on remount\n"); 1132ac27a0ecSDave Kleikamp return 0; 1133ac27a0ecSDave Kleikamp } 1134ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1135ac27a0ecSDave Kleikamp return 0; 1136ac27a0ecSDave Kleikamp *inum = option; 1137ac27a0ecSDave Kleikamp break; 1138ac27a0ecSDave Kleikamp case Opt_journal_dev: 1139ac27a0ecSDave Kleikamp if (is_remount) { 1140617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1141ac27a0ecSDave Kleikamp "journal on remount\n"); 1142ac27a0ecSDave Kleikamp return 0; 1143ac27a0ecSDave Kleikamp } 1144ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1145ac27a0ecSDave Kleikamp return 0; 1146ac27a0ecSDave Kleikamp *journal_devnum = option; 1147ac27a0ecSDave Kleikamp break; 1148818d276cSGirish Shilamkar case Opt_journal_checksum: 1149818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1150818d276cSGirish Shilamkar break; 1151818d276cSGirish Shilamkar case Opt_journal_async_commit: 1152818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1153818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1154818d276cSGirish Shilamkar break; 1155ac27a0ecSDave Kleikamp case Opt_noload: 1156ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1157ac27a0ecSDave Kleikamp break; 1158ac27a0ecSDave Kleikamp case Opt_commit: 1159ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1160ac27a0ecSDave Kleikamp return 0; 1161ac27a0ecSDave Kleikamp if (option < 0) 1162ac27a0ecSDave Kleikamp return 0; 1163ac27a0ecSDave Kleikamp if (option == 0) 1164cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1165ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1166ac27a0ecSDave Kleikamp break; 1167ac27a0ecSDave Kleikamp case Opt_data_journal: 1168617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1169ac27a0ecSDave Kleikamp goto datacheck; 1170ac27a0ecSDave Kleikamp case Opt_data_ordered: 1171617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1172ac27a0ecSDave Kleikamp goto datacheck; 1173ac27a0ecSDave Kleikamp case Opt_data_writeback: 1174617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1175ac27a0ecSDave Kleikamp datacheck: 1176ac27a0ecSDave Kleikamp if (is_remount) { 1177617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1178ac27a0ecSDave Kleikamp != data_opt) { 1179ac27a0ecSDave Kleikamp printk(KERN_ERR 1180617ba13bSMingming Cao "EXT4-fs: cannot change data " 1181ac27a0ecSDave Kleikamp "mode on remount\n"); 1182ac27a0ecSDave Kleikamp return 0; 1183ac27a0ecSDave Kleikamp } 1184ac27a0ecSDave Kleikamp } else { 1185617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1186ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1187ac27a0ecSDave Kleikamp } 1188ac27a0ecSDave Kleikamp break; 1189ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1190ac27a0ecSDave Kleikamp case Opt_usrjquota: 1191ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1192ac27a0ecSDave Kleikamp goto set_qf_name; 1193ac27a0ecSDave Kleikamp case Opt_grpjquota: 1194ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1195ac27a0ecSDave Kleikamp set_qf_name: 1196dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1197dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1198dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1199ac27a0ecSDave Kleikamp printk(KERN_ERR 12002c8be6b2SJan Kara "EXT4-fs: Cannot change journaled " 1201ac27a0ecSDave Kleikamp "quota options when quota turned on.\n"); 1202ac27a0ecSDave Kleikamp return 0; 1203ac27a0ecSDave Kleikamp } 1204ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1205ac27a0ecSDave Kleikamp if (!qname) { 1206ac27a0ecSDave Kleikamp printk(KERN_ERR 1207617ba13bSMingming Cao "EXT4-fs: not enough memory for " 1208ac27a0ecSDave Kleikamp "storing quotafile name.\n"); 1209ac27a0ecSDave Kleikamp return 0; 1210ac27a0ecSDave Kleikamp } 1211ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1212ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1213ac27a0ecSDave Kleikamp printk(KERN_ERR 1214617ba13bSMingming Cao "EXT4-fs: %s quota file already " 1215ac27a0ecSDave Kleikamp "specified.\n", QTYPE2NAME(qtype)); 1216ac27a0ecSDave Kleikamp kfree(qname); 1217ac27a0ecSDave Kleikamp return 0; 1218ac27a0ecSDave Kleikamp } 1219ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1220ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1221ac27a0ecSDave Kleikamp printk(KERN_ERR 1222617ba13bSMingming Cao "EXT4-fs: quotafile must be on " 1223ac27a0ecSDave Kleikamp "filesystem root.\n"); 1224ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1225ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1226ac27a0ecSDave Kleikamp return 0; 1227ac27a0ecSDave Kleikamp } 1228ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1229ac27a0ecSDave Kleikamp break; 1230ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1231ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1232ac27a0ecSDave Kleikamp goto clear_qf_name; 1233ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1234ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1235ac27a0ecSDave Kleikamp clear_qf_name: 1236dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1237dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1238dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1239617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 12402c8be6b2SJan Kara "journaled quota options when " 1241ac27a0ecSDave Kleikamp "quota turned on.\n"); 1242ac27a0ecSDave Kleikamp return 0; 1243ac27a0ecSDave Kleikamp } 1244ac27a0ecSDave Kleikamp /* 1245ac27a0ecSDave Kleikamp * The space will be released later when all options 1246ac27a0ecSDave Kleikamp * are confirmed to be correct 1247ac27a0ecSDave Kleikamp */ 1248ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1249ac27a0ecSDave Kleikamp break; 1250ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1251dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1252dfc5d03fSJan Kara goto set_qf_format; 1253ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1254dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1255dfc5d03fSJan Kara set_qf_format: 1256dfc5d03fSJan Kara if ((sb_any_quota_enabled(sb) || 1257dfc5d03fSJan Kara sb_any_quota_suspended(sb)) && 1258dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1259dfc5d03fSJan Kara printk(KERN_ERR "EXT4-fs: Cannot change " 1260dfc5d03fSJan Kara "journaled quota options when " 1261dfc5d03fSJan Kara "quota turned on.\n"); 1262dfc5d03fSJan Kara return 0; 1263dfc5d03fSJan Kara } 1264dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1265ac27a0ecSDave Kleikamp break; 1266ac27a0ecSDave Kleikamp case Opt_quota: 1267ac27a0ecSDave Kleikamp case Opt_usrquota: 1268ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1269ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1270ac27a0ecSDave Kleikamp break; 1271ac27a0ecSDave Kleikamp case Opt_grpquota: 1272ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1273ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1274ac27a0ecSDave Kleikamp break; 1275ac27a0ecSDave Kleikamp case Opt_noquota: 1276ac27a0ecSDave Kleikamp if (sb_any_quota_enabled(sb)) { 1277617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1278ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1279ac27a0ecSDave Kleikamp return 0; 1280ac27a0ecSDave Kleikamp } 1281ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1282ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1283ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1284ac27a0ecSDave Kleikamp break; 1285ac27a0ecSDave Kleikamp #else 1286ac27a0ecSDave Kleikamp case Opt_quota: 1287ac27a0ecSDave Kleikamp case Opt_usrquota: 1288ac27a0ecSDave Kleikamp case Opt_grpquota: 1289cd59e7b9SJan Kara printk(KERN_ERR 1290cd59e7b9SJan Kara "EXT4-fs: quota options not supported.\n"); 1291cd59e7b9SJan Kara break; 1292ac27a0ecSDave Kleikamp case Opt_usrjquota: 1293ac27a0ecSDave Kleikamp case Opt_grpjquota: 1294ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1295ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1296ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1297ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1298ac27a0ecSDave Kleikamp printk(KERN_ERR 1299cd59e7b9SJan Kara "EXT4-fs: journaled quota options not " 1300ac27a0ecSDave Kleikamp "supported.\n"); 1301ac27a0ecSDave Kleikamp break; 1302ac27a0ecSDave Kleikamp case Opt_noquota: 1303ac27a0ecSDave Kleikamp break; 1304ac27a0ecSDave Kleikamp #endif 1305ac27a0ecSDave Kleikamp case Opt_abort: 1306ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1307ac27a0ecSDave Kleikamp break; 1308ac27a0ecSDave Kleikamp case Opt_barrier: 1309ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1310ac27a0ecSDave Kleikamp return 0; 1311ac27a0ecSDave Kleikamp if (option) 1312ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1313ac27a0ecSDave Kleikamp else 1314ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1315ac27a0ecSDave Kleikamp break; 1316ac27a0ecSDave Kleikamp case Opt_ignore: 1317ac27a0ecSDave Kleikamp break; 1318ac27a0ecSDave Kleikamp case Opt_resize: 1319ac27a0ecSDave Kleikamp if (!is_remount) { 1320617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1321ac27a0ecSDave Kleikamp "for remount\n"); 1322ac27a0ecSDave Kleikamp return 0; 1323ac27a0ecSDave Kleikamp } 1324ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1325ac27a0ecSDave Kleikamp return 0; 1326ac27a0ecSDave Kleikamp *n_blocks_count = option; 1327ac27a0ecSDave Kleikamp break; 1328ac27a0ecSDave Kleikamp case Opt_nobh: 1329ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1330ac27a0ecSDave Kleikamp break; 1331ac27a0ecSDave Kleikamp case Opt_bh: 1332ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1333ac27a0ecSDave Kleikamp break; 1334a86c6181SAlex Tomas case Opt_extents: 1335e4079a11SEric Sandeen if (!EXT4_HAS_INCOMPAT_FEATURE(sb, 1336e4079a11SEric Sandeen EXT4_FEATURE_INCOMPAT_EXTENTS)) { 1337e4079a11SEric Sandeen ext4_warning(sb, __func__, 1338e4079a11SEric Sandeen "extents feature not enabled " 1339e4079a11SEric Sandeen "on this filesystem, use tune2fs\n"); 1340e4079a11SEric Sandeen return 0; 1341e4079a11SEric Sandeen } 1342a86c6181SAlex Tomas set_opt(sbi->s_mount_opt, EXTENTS); 1343a86c6181SAlex Tomas break; 13441e2462f9SMingming Cao case Opt_noextents: 1345c07651b5SAneesh Kumar K.V /* 1346c07651b5SAneesh Kumar K.V * When e2fsprogs support resizing an already existing 1347c07651b5SAneesh Kumar K.V * ext3 file system to greater than 2**32 we need to 1348c07651b5SAneesh Kumar K.V * add support to block allocator to handle growing 1349c07651b5SAneesh Kumar K.V * already existing block mapped inode so that blocks 1350c07651b5SAneesh Kumar K.V * allocated for them fall within 2**32 1351c07651b5SAneesh Kumar K.V */ 1352c07651b5SAneesh Kumar K.V last_block = ext4_blocks_count(sbi->s_es) - 1; 1353c07651b5SAneesh Kumar K.V if (last_block > 0xffffffffULL) { 1354c07651b5SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: Filesystem too " 1355c07651b5SAneesh Kumar K.V "large to mount with " 1356c07651b5SAneesh Kumar K.V "-o noextents options\n"); 1357c07651b5SAneesh Kumar K.V return 0; 1358c07651b5SAneesh Kumar K.V } 13591e2462f9SMingming Cao clear_opt(sbi->s_mount_opt, EXTENTS); 13601e2462f9SMingming Cao break; 136125ec56b5SJean Noel Cordenner case Opt_i_version: 136225ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 136325ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 136425ec56b5SJean Noel Cordenner break; 1365dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1366dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1367dd919b98SAneesh Kumar K.V break; 1368c9de560dSAlex Tomas case Opt_stripe: 1369c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1370c9de560dSAlex Tomas return 0; 1371c9de560dSAlex Tomas if (option < 0) 1372c9de560dSAlex Tomas return 0; 1373c9de560dSAlex Tomas sbi->s_stripe = option; 1374c9de560dSAlex Tomas break; 137564769240SAlex Tomas case Opt_delalloc: 137664769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 137764769240SAlex Tomas break; 1378240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1379240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1380240799cdSTheodore Ts'o return 0; 1381240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1382240799cdSTheodore Ts'o return 0; 1383240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1384240799cdSTheodore Ts'o break; 1385ac27a0ecSDave Kleikamp default: 1386ac27a0ecSDave Kleikamp printk(KERN_ERR 1387617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1388ac27a0ecSDave Kleikamp "or missing value\n", p); 1389ac27a0ecSDave Kleikamp return 0; 1390ac27a0ecSDave Kleikamp } 1391ac27a0ecSDave Kleikamp } 1392ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1393ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1394617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1395ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1396ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1397ac27a0ecSDave Kleikamp 1398617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1399ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1400ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1401ac27a0ecSDave Kleikamp 1402ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1403617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1404ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1405617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1406617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1407ac27a0ecSDave Kleikamp "format mixing.\n"); 1408ac27a0ecSDave Kleikamp return 0; 1409ac27a0ecSDave Kleikamp } 1410ac27a0ecSDave Kleikamp 1411ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 14122c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 1413ac27a0ecSDave Kleikamp "not specified.\n"); 1414ac27a0ecSDave Kleikamp return 0; 1415ac27a0ecSDave Kleikamp } 1416ac27a0ecSDave Kleikamp } else { 1417ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 14182c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 14192c8be6b2SJan Kara "specified with no journaling " 1420ac27a0ecSDave Kleikamp "enabled.\n"); 1421ac27a0ecSDave Kleikamp return 0; 1422ac27a0ecSDave Kleikamp } 1423ac27a0ecSDave Kleikamp } 1424ac27a0ecSDave Kleikamp #endif 1425ac27a0ecSDave Kleikamp return 1; 1426ac27a0ecSDave Kleikamp } 1427ac27a0ecSDave Kleikamp 1428617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1429ac27a0ecSDave Kleikamp int read_only) 1430ac27a0ecSDave Kleikamp { 1431617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1432ac27a0ecSDave Kleikamp int res = 0; 1433ac27a0ecSDave Kleikamp 1434617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1435617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs warning: revision level too high, " 1436ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1437ac27a0ecSDave Kleikamp res = MS_RDONLY; 1438ac27a0ecSDave Kleikamp } 1439ac27a0ecSDave Kleikamp if (read_only) 1440ac27a0ecSDave Kleikamp return res; 1441617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1442617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1443ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1444617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1445ac27a0ecSDave Kleikamp printk(KERN_WARNING 1446617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1447ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1448ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1449ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1450ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1451ac27a0ecSDave Kleikamp printk(KERN_WARNING 1452617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1453ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1454ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1455ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1456ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1457ac27a0ecSDave Kleikamp printk(KERN_WARNING 1458617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1459ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1460ac27a0ecSDave Kleikamp #if 0 1461ac27a0ecSDave Kleikamp /* @@@ We _will_ want to clear the valid bit if we find 146263f57933SAndrew Morton * inconsistencies, to force a fsck at reboot. But for 146363f57933SAndrew Morton * a plain journaled filesystem we can keep it set as 146463f57933SAndrew Morton * valid forever! :) 146563f57933SAndrew Morton */ 1466216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1467ac27a0ecSDave Kleikamp #endif 1468ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1469617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1470e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1471ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1472617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 1473617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1474ac27a0ecSDave Kleikamp 1475617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1476ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1477617ba13bSMingming Cao printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " 1478ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1479ac27a0ecSDave Kleikamp sb->s_blocksize, 1480ac27a0ecSDave Kleikamp sbi->s_groups_count, 1481617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1482617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1483ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1484ac27a0ecSDave Kleikamp 148505496769STheodore Ts'o printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", 148605496769STheodore Ts'o sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : 148705496769STheodore Ts'o "external", EXT4_SB(sb)->s_journal->j_devname); 1488ac27a0ecSDave Kleikamp return res; 1489ac27a0ecSDave Kleikamp } 1490ac27a0ecSDave Kleikamp 1491772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1492772cb7c8SJose R. Santos { 1493772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1494772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1495772cb7c8SJose R. Santos struct buffer_head *bh; 1496772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1497772cb7c8SJose R. Santos ext4_group_t flex_group; 1498772cb7c8SJose R. Santos int groups_per_flex = 0; 1499772cb7c8SJose R. Santos __u64 block_bitmap = 0; 1500772cb7c8SJose R. Santos int i; 1501772cb7c8SJose R. Santos 1502772cb7c8SJose R. Santos if (!sbi->s_es->s_log_groups_per_flex) { 1503772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1504772cb7c8SJose R. Santos return 1; 1505772cb7c8SJose R. Santos } 1506772cb7c8SJose R. Santos 1507772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1508772cb7c8SJose R. Santos groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1509772cb7c8SJose R. Santos 1510c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1511c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1512c62a11fdSFrederic Bohe ((sbi->s_es->s_reserved_gdt_blocks +1 ) << 1513c62a11fdSFrederic Bohe EXT4_DESC_PER_BLOCK_BITS(sb))) / 1514772cb7c8SJose R. Santos groups_per_flex; 1515ec05e868SLi Zefan sbi->s_flex_groups = kzalloc(flex_group_count * 1516772cb7c8SJose R. Santos sizeof(struct flex_groups), GFP_KERNEL); 1517772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1518ec05e868SLi Zefan printk(KERN_ERR "EXT4-fs: not enough memory for " 1519ec05e868SLi Zefan "%lu flex groups\n", flex_group_count); 1520772cb7c8SJose R. Santos goto failed; 1521772cb7c8SJose R. Santos } 1522772cb7c8SJose R. Santos 1523772cb7c8SJose R. Santos gdp = ext4_get_group_desc(sb, 1, &bh); 1524772cb7c8SJose R. Santos block_bitmap = ext4_block_bitmap(sb, gdp) - 1; 1525772cb7c8SJose R. Santos 1526772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 1527772cb7c8SJose R. Santos gdp = ext4_get_group_desc(sb, i, &bh); 1528772cb7c8SJose R. Santos 1529772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 1530772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_inodes += 1531772cb7c8SJose R. Santos le16_to_cpu(gdp->bg_free_inodes_count); 1532772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_blocks += 1533772cb7c8SJose R. Santos le16_to_cpu(gdp->bg_free_blocks_count); 1534772cb7c8SJose R. Santos } 1535772cb7c8SJose R. Santos 1536772cb7c8SJose R. Santos return 1; 1537772cb7c8SJose R. Santos failed: 1538772cb7c8SJose R. Santos return 0; 1539772cb7c8SJose R. Santos } 1540772cb7c8SJose R. Santos 1541717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1542717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1543717d50e4SAndreas Dilger { 1544717d50e4SAndreas Dilger __u16 crc = 0; 1545717d50e4SAndreas Dilger 1546717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1547717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1548717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1549717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1550717d50e4SAndreas Dilger 1551717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1552717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1553717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1554717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1555717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1556717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1557717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1558717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1559717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1560717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1561717d50e4SAndreas Dilger offset); 1562717d50e4SAndreas Dilger } 1563717d50e4SAndreas Dilger 1564717d50e4SAndreas Dilger return cpu_to_le16(crc); 1565717d50e4SAndreas Dilger } 1566717d50e4SAndreas Dilger 1567717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1568717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1569717d50e4SAndreas Dilger { 1570717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1571717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1572717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1573717d50e4SAndreas Dilger return 0; 1574717d50e4SAndreas Dilger 1575717d50e4SAndreas Dilger return 1; 1576717d50e4SAndreas Dilger } 1577717d50e4SAndreas Dilger 1578ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1579617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1580ac27a0ecSDave Kleikamp { 1581617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1582617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1583617ba13bSMingming Cao ext4_fsblk_t last_block; 1584bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1585bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1586bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1587ce421581SJose R. Santos int flexbg_flag = 0; 1588fd2d4291SAvantika Mathur ext4_group_t i; 1589ac27a0ecSDave Kleikamp 1590ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1591ce421581SJose R. Santos flexbg_flag = 1; 1592ce421581SJose R. Santos 1593617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1594ac27a0ecSDave Kleikamp 1595197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1596197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1597197cd65aSAkinobu Mita 1598ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1599bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1600ac27a0ecSDave Kleikamp else 1601ac27a0ecSDave Kleikamp last_block = first_block + 1602617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1603ac27a0ecSDave Kleikamp 16048fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 16052b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1606c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1607c19204b0SJosef Bacik "Block bitmap for group %lu not in group " 1608c19204b0SJosef Bacik "(block %llu)!", i, block_bitmap); 1609ac27a0ecSDave Kleikamp return 0; 1610ac27a0ecSDave Kleikamp } 16118fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 16122b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1613c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1614c19204b0SJosef Bacik "Inode bitmap for group %lu not in group " 1615c19204b0SJosef Bacik "(block %llu)!", i, inode_bitmap); 1616ac27a0ecSDave Kleikamp return 0; 1617ac27a0ecSDave Kleikamp } 16188fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1619bd81d8eeSLaurent Vivier if (inode_table < first_block || 16202b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1621c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1622c19204b0SJosef Bacik "Inode table for group %lu not in group " 1623c19204b0SJosef Bacik "(block %llu)!", i, inode_table); 1624ac27a0ecSDave Kleikamp return 0; 1625ac27a0ecSDave Kleikamp } 1626b5f10eedSEric Sandeen spin_lock(sb_bgl_lock(sbi, i)); 1627717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1628c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1629fd2d4291SAvantika Mathur "Checksum for group %lu failed (%u!=%u)\n", 1630fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1631fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 16327ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 16337ee1ec4cSLi Zefan spin_unlock(sb_bgl_lock(sbi, i)); 1634717d50e4SAndreas Dilger return 0; 1635717d50e4SAndreas Dilger } 16367ee1ec4cSLi Zefan } 1637b5f10eedSEric Sandeen spin_unlock(sb_bgl_lock(sbi, i)); 1638ce421581SJose R. Santos if (!flexbg_flag) 1639617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1640ac27a0ecSDave Kleikamp } 1641ac27a0ecSDave Kleikamp 1642bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1643617ba13bSMingming Cao sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 1644ac27a0ecSDave Kleikamp return 1; 1645ac27a0ecSDave Kleikamp } 1646ac27a0ecSDave Kleikamp 1647617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1648ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1649ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1650ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1651ac27a0ecSDave Kleikamp * 1652ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1653ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1654ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1655ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1656ac27a0ecSDave Kleikamp * 1657ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1658ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1659ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1660617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1661ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1662ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1663ac27a0ecSDave Kleikamp */ 1664617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1665617ba13bSMingming Cao struct ext4_super_block *es) 1666ac27a0ecSDave Kleikamp { 1667ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1668ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1669ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1670ac27a0ecSDave Kleikamp int i; 1671ac27a0ecSDave Kleikamp #endif 1672ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1673ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1674ac27a0ecSDave Kleikamp return; 1675ac27a0ecSDave Kleikamp } 1676ac27a0ecSDave Kleikamp 1677a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1678a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1679a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1680a8f48a95SEric Sandeen return; 1681a8f48a95SEric Sandeen } 1682a8f48a95SEric Sandeen 1683617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1684ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1685ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1686ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1687ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1688ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1689ac27a0ecSDave Kleikamp return; 1690ac27a0ecSDave Kleikamp } 1691ac27a0ecSDave Kleikamp 1692ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1693617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1694ac27a0ecSDave Kleikamp sb->s_id); 1695ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1696ac27a0ecSDave Kleikamp } 1697ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1698ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1699ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1700ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1701ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1702617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1703617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1704ac27a0ecSDave Kleikamp if (ret < 0) 1705ac27a0ecSDave Kleikamp printk(KERN_ERR 17062c8be6b2SJan Kara "EXT4-fs: Cannot turn on journaled " 1707ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1708ac27a0ecSDave Kleikamp } 1709ac27a0ecSDave Kleikamp } 1710ac27a0ecSDave Kleikamp #endif 1711ac27a0ecSDave Kleikamp 1712ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1713ac27a0ecSDave Kleikamp struct inode *inode; 1714ac27a0ecSDave Kleikamp 171597bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 171697bd42b9SJosef Bacik if (IS_ERR(inode)) { 1717ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1718ac27a0ecSDave Kleikamp break; 1719ac27a0ecSDave Kleikamp } 1720ac27a0ecSDave Kleikamp 1721617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1722ac27a0ecSDave Kleikamp DQUOT_INIT(inode); 1723ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1724ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1725e5f8eab8STheodore Ts'o "%s: truncating inode %lu to %lld bytes\n", 172646e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1727e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1728ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1729617ba13bSMingming Cao ext4_truncate(inode); 1730ac27a0ecSDave Kleikamp nr_truncates++; 1731ac27a0ecSDave Kleikamp } else { 1732ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1733ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 173446e665e9SHarvey Harrison __func__, inode->i_ino); 1735ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1736ac27a0ecSDave Kleikamp inode->i_ino); 1737ac27a0ecSDave Kleikamp nr_orphans++; 1738ac27a0ecSDave Kleikamp } 1739ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1740ac27a0ecSDave Kleikamp } 1741ac27a0ecSDave Kleikamp 1742ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 1743ac27a0ecSDave Kleikamp 1744ac27a0ecSDave Kleikamp if (nr_orphans) 1745617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1746ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1747ac27a0ecSDave Kleikamp if (nr_truncates) 1748617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1749ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1750ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1751ac27a0ecSDave Kleikamp /* Turn quotas off */ 1752ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1753ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 17546f28e087SJan Kara vfs_quota_off(sb, i, 0); 1755ac27a0ecSDave Kleikamp } 1756ac27a0ecSDave Kleikamp #endif 1757ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1758ac27a0ecSDave Kleikamp } 1759cd2291a4SEric Sandeen /* 1760cd2291a4SEric Sandeen * Maximal extent format file size. 1761cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1762cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1763cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1764cd2291a4SEric Sandeen * so that won't be a limiting factor. 1765cd2291a4SEric Sandeen * 1766cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1767cd2291a4SEric Sandeen */ 1768cd2291a4SEric Sandeen static loff_t ext4_max_size(int blkbits) 1769cd2291a4SEric Sandeen { 1770cd2291a4SEric Sandeen loff_t res; 1771cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1772cd2291a4SEric Sandeen 1773cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1774cd2291a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 1775cd2291a4SEric Sandeen /* 1776cd2291a4SEric Sandeen * CONFIG_LSF is not enabled implies the inode 1777cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1778cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1779cd2291a4SEric Sandeen */ 1780cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1781cd2291a4SEric Sandeen 1782cd2291a4SEric Sandeen /* total blocks in file system block size */ 1783cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1784cd2291a4SEric Sandeen upper_limit <<= blkbits; 1785cd2291a4SEric Sandeen } 1786cd2291a4SEric Sandeen 1787cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1788cd2291a4SEric Sandeen res = 1LL << 32; 1789cd2291a4SEric Sandeen res <<= blkbits; 1790cd2291a4SEric Sandeen res -= 1; 1791cd2291a4SEric Sandeen 1792cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1793cd2291a4SEric Sandeen if (res > upper_limit) 1794cd2291a4SEric Sandeen res = upper_limit; 1795cd2291a4SEric Sandeen 1796cd2291a4SEric Sandeen return res; 1797cd2291a4SEric Sandeen } 1798ac27a0ecSDave Kleikamp 1799ac27a0ecSDave Kleikamp /* 1800cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 18010fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 18020fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1803ac27a0ecSDave Kleikamp */ 1804cd2291a4SEric Sandeen static loff_t ext4_max_bitmap_size(int bits) 1805ac27a0ecSDave Kleikamp { 1806617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 18070fc1b451SAneesh Kumar K.V int meta_blocks; 18080fc1b451SAneesh Kumar K.V loff_t upper_limit; 18090fc1b451SAneesh Kumar K.V /* This is calculated to be the largest file size for a 1810cd2291a4SEric Sandeen * dense, bitmapped file such that the total number of 1811ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 18120fc1b451SAneesh Kumar K.V * does not exceed 2^48 -1 18130fc1b451SAneesh Kumar K.V * __u32 i_blocks_lo and _u16 i_blocks_high representing the 18140fc1b451SAneesh Kumar K.V * total number of 512 bytes blocks of the file 18150fc1b451SAneesh Kumar K.V */ 18160fc1b451SAneesh Kumar K.V 18170fc1b451SAneesh Kumar K.V if (sizeof(blkcnt_t) < sizeof(u64)) { 18180fc1b451SAneesh Kumar K.V /* 18190fc1b451SAneesh Kumar K.V * CONFIG_LSF is not enabled implies the inode 18200fc1b451SAneesh Kumar K.V * i_block represent total blocks in 512 bytes 18210fc1b451SAneesh Kumar K.V * 32 == size of vfs inode i_blocks * 8 18220fc1b451SAneesh Kumar K.V */ 18230fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 18240fc1b451SAneesh Kumar K.V 18250fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 18260fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 18270fc1b451SAneesh Kumar K.V 18280fc1b451SAneesh Kumar K.V } else { 18298180a562SAneesh Kumar K.V /* 18308180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 18318180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 18328180a562SAneesh Kumar K.V * represent total number of blocks in 18338180a562SAneesh Kumar K.V * file system block size 18348180a562SAneesh Kumar K.V */ 18350fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 18360fc1b451SAneesh Kumar K.V 18370fc1b451SAneesh Kumar K.V } 18380fc1b451SAneesh Kumar K.V 18390fc1b451SAneesh Kumar K.V /* indirect blocks */ 18400fc1b451SAneesh Kumar K.V meta_blocks = 1; 18410fc1b451SAneesh Kumar K.V /* double indirect blocks */ 18420fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 18430fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 18440fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 18450fc1b451SAneesh Kumar K.V 18460fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 18470fc1b451SAneesh Kumar K.V upper_limit <<= bits; 1848ac27a0ecSDave Kleikamp 1849ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1850ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1851ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1852ac27a0ecSDave Kleikamp res <<= bits; 1853ac27a0ecSDave Kleikamp if (res > upper_limit) 1854ac27a0ecSDave Kleikamp res = upper_limit; 18550fc1b451SAneesh Kumar K.V 18560fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 18570fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 18580fc1b451SAneesh Kumar K.V 1859ac27a0ecSDave Kleikamp return res; 1860ac27a0ecSDave Kleikamp } 1861ac27a0ecSDave Kleikamp 1862617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 186370bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1864ac27a0ecSDave Kleikamp { 1865617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1866fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 1867ac27a0ecSDave Kleikamp int has_super = 0; 1868ac27a0ecSDave Kleikamp 1869ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 1870ac27a0ecSDave Kleikamp 1871617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 1872ac27a0ecSDave Kleikamp nr < first_meta_bg) 187370bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 1874ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 1875617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 1876ac27a0ecSDave Kleikamp has_super = 1; 1877617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 1878ac27a0ecSDave Kleikamp } 1879ac27a0ecSDave Kleikamp 1880c9de560dSAlex Tomas /** 1881c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 1882c9de560dSAlex Tomas * @sbi: In memory super block info 1883c9de560dSAlex Tomas * 1884c9de560dSAlex Tomas * If we have specified it via mount option, then 1885c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 1886c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 1887c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 1888c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 1889c9de560dSAlex Tomas * 1890c9de560dSAlex Tomas */ 1891c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 1892c9de560dSAlex Tomas { 1893c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 1894c9de560dSAlex Tomas unsigned long stripe_width = 1895c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 1896c9de560dSAlex Tomas 1897c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 1898c9de560dSAlex Tomas return sbi->s_stripe; 1899c9de560dSAlex Tomas 1900c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 1901c9de560dSAlex Tomas return stripe_width; 1902c9de560dSAlex Tomas 1903c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 1904c9de560dSAlex Tomas return stride; 1905c9de560dSAlex Tomas 1906c9de560dSAlex Tomas return 0; 1907c9de560dSAlex Tomas } 1908ac27a0ecSDave Kleikamp 1909617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 19107477827fSAneesh Kumar K.V __releases(kernel_lock) 19117477827fSAneesh Kumar K.V __acquires(kernel_lock) 19121d03ec98SAneesh Kumar K.V 1913ac27a0ecSDave Kleikamp { 1914ac27a0ecSDave Kleikamp struct buffer_head *bh; 1915617ba13bSMingming Cao struct ext4_super_block *es = NULL; 1916617ba13bSMingming Cao struct ext4_sb_info *sbi; 1917617ba13bSMingming Cao ext4_fsblk_t block; 1918617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 191970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 1920ac27a0ecSDave Kleikamp unsigned long offset = 0; 1921ac27a0ecSDave Kleikamp unsigned int journal_inum = 0; 1922ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 1923ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 1924ac27a0ecSDave Kleikamp struct inode *root; 19259f6200bbSTheodore Ts'o char *cp; 19261d1fe1eeSDavid Howells int ret = -EINVAL; 1927ac27a0ecSDave Kleikamp int blocksize; 1928ac27a0ecSDave Kleikamp int db_count; 1929ac27a0ecSDave Kleikamp int i; 1930ac27a0ecSDave Kleikamp int needs_recovery; 1931ac27a0ecSDave Kleikamp __le32 features; 1932bd81d8eeSLaurent Vivier __u64 blocks_count; 1933833f4077SPeter Zijlstra int err; 1934ac27a0ecSDave Kleikamp 1935ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 1936ac27a0ecSDave Kleikamp if (!sbi) 1937ac27a0ecSDave Kleikamp return -ENOMEM; 1938ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 1939ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 1940617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 1941617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 1942240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 1943d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 1944ac27a0ecSDave Kleikamp 1945ac27a0ecSDave Kleikamp unlock_kernel(); 1946ac27a0ecSDave Kleikamp 19479f6200bbSTheodore Ts'o /* Cleanup superblock name */ 19489f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 19499f6200bbSTheodore Ts'o *cp = '!'; 19509f6200bbSTheodore Ts'o 1951617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 1952ac27a0ecSDave Kleikamp if (!blocksize) { 1953617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 1954ac27a0ecSDave Kleikamp goto out_fail; 1955ac27a0ecSDave Kleikamp } 1956ac27a0ecSDave Kleikamp 1957ac27a0ecSDave Kleikamp /* 1958617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 1959ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 1960ac27a0ecSDave Kleikamp */ 1961617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 196270bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 196370bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 1964ac27a0ecSDave Kleikamp } else { 196570bbb3e0SAndrew Morton logical_sb_block = sb_block; 1966ac27a0ecSDave Kleikamp } 1967ac27a0ecSDave Kleikamp 196870bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 1969617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); 1970ac27a0ecSDave Kleikamp goto out_fail; 1971ac27a0ecSDave Kleikamp } 1972ac27a0ecSDave Kleikamp /* 1973ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 1974617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 1975ac27a0ecSDave Kleikamp */ 1976617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 1977ac27a0ecSDave Kleikamp sbi->s_es = es; 1978ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 1979617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 1980617ba13bSMingming Cao goto cantfind_ext4; 1981ac27a0ecSDave Kleikamp 1982ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 1983ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 1984617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 1985ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1986617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 1987ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1988617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 1989ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1990*03010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1991617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 1992ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 19932e7842b8SHugh Dickins #endif 1994*03010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1995617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 1996ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 19972e7842b8SHugh Dickins #endif 1998617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 1999617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 2000617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2001617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 2002617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2003617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 2004ac27a0ecSDave Kleikamp 2005617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2006ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2007bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2008ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2009bb4f397aSAneesh Kumar K.V else 2010bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2011ac27a0ecSDave Kleikamp 2012ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2013ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 2014ac27a0ecSDave Kleikamp 2015ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 2016571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2017ac27a0ecSDave Kleikamp 20181e2462f9SMingming Cao /* 20191e2462f9SMingming Cao * turn on extents feature by default in ext4 filesystem 2020e4079a11SEric Sandeen * only if feature flag already set by mkfs or tune2fs. 2021e4079a11SEric Sandeen * Use -o noextents to turn it off 20221e2462f9SMingming Cao */ 2023e4079a11SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 20241e2462f9SMingming Cao set_opt(sbi->s_mount_opt, EXTENTS); 2025e4079a11SEric Sandeen else 2026e4079a11SEric Sandeen ext4_warning(sb, __func__, 2027e4079a11SEric Sandeen "extents feature not enabled on this filesystem, " 2028e4079a11SEric Sandeen "use tune2fs.\n"); 20291e2462f9SMingming Cao 2030dd919b98SAneesh Kumar K.V /* 2031dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2032dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2033dd919b98SAneesh Kumar K.V */ 2034dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2035dd919b98SAneesh Kumar K.V 2036dd919b98SAneesh Kumar K.V 2037ac27a0ecSDave Kleikamp if (!parse_options((char *) data, sb, &journal_inum, &journal_devnum, 2038ac27a0ecSDave Kleikamp NULL, 0)) 2039ac27a0ecSDave Kleikamp goto failed_mount; 2040ac27a0ecSDave Kleikamp 2041ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2042617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2043ac27a0ecSDave Kleikamp 2044617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2045617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2046617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2047617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2048ac27a0ecSDave Kleikamp printk(KERN_WARNING 2049617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 2050ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 2051469108ffSTheodore Tso 2052469108ffSTheodore Tso /* 2053ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2054ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2055ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2056ac27a0ecSDave Kleikamp */ 2057617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 2058ac27a0ecSDave Kleikamp if (features) { 2059617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 2060ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 2061ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 2062ac27a0ecSDave Kleikamp goto failed_mount; 2063ac27a0ecSDave Kleikamp } 2064617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 2065ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 2066617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 2067ac27a0ecSDave Kleikamp "unsupported optional features (%x).\n", 2068ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(features)); 2069ac27a0ecSDave Kleikamp goto failed_mount; 2070ac27a0ecSDave Kleikamp } 20710fc1b451SAneesh Kumar K.V if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 20720fc1b451SAneesh Kumar K.V /* 20730fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 20740fc1b451SAneesh Kumar K.V * mount if kernel is build with CONFIG_LSF 20750fc1b451SAneesh Kumar K.V */ 20760fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 20770fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 20780fc1b451SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " 20790fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 20800fc1b451SAneesh Kumar K.V "without CONFIG_LSF.\n", sb->s_id); 20810fc1b451SAneesh Kumar K.V goto failed_mount; 20820fc1b451SAneesh Kumar K.V } 20830fc1b451SAneesh Kumar K.V } 2084ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2085ac27a0ecSDave Kleikamp 2086617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2087617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2088ac27a0ecSDave Kleikamp printk(KERN_ERR 2089617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 2090ac27a0ecSDave Kleikamp blocksize, sb->s_id); 2091ac27a0ecSDave Kleikamp goto failed_mount; 2092ac27a0ecSDave Kleikamp } 2093ac27a0ecSDave Kleikamp 2094ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2095ce40733cSAneesh Kumar K.V 2096ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2097ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2098ce40733cSAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: bad block size %d.\n", 2099ce40733cSAneesh Kumar K.V blocksize); 2100ac27a0ecSDave Kleikamp goto failed_mount; 2101ac27a0ecSDave Kleikamp } 2102ac27a0ecSDave Kleikamp 2103ac27a0ecSDave Kleikamp brelse(bh); 210470bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 210570bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 210670bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2107ac27a0ecSDave Kleikamp if (!bh) { 2108ac27a0ecSDave Kleikamp printk(KERN_ERR 2109617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 2110ac27a0ecSDave Kleikamp goto failed_mount; 2111ac27a0ecSDave Kleikamp } 2112617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2113ac27a0ecSDave Kleikamp sbi->s_es = es; 2114617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2115ac27a0ecSDave Kleikamp printk(KERN_ERR 2116617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 2117ac27a0ecSDave Kleikamp goto failed_mount; 2118ac27a0ecSDave Kleikamp } 2119ac27a0ecSDave Kleikamp } 2120ac27a0ecSDave Kleikamp 2121e2b46574SEric Sandeen sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits); 2122617ba13bSMingming Cao sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits); 2123ac27a0ecSDave Kleikamp 2124617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2125617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2126617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2127ac27a0ecSDave Kleikamp } else { 2128ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2129ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2130617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 21311330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2132ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2133ac27a0ecSDave Kleikamp printk(KERN_ERR 2134617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 2135ac27a0ecSDave Kleikamp sbi->s_inode_size); 2136ac27a0ecSDave Kleikamp goto failed_mount; 2137ac27a0ecSDave Kleikamp } 2138ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2139ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2140ac27a0ecSDave Kleikamp } 21410d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 21420d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 21438fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 21440d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2145d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 21460d1ee42fSAlexandre Ratchov printk(KERN_ERR 21478fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 21480d1ee42fSAlexandre Ratchov sbi->s_desc_size); 21490d1ee42fSAlexandre Ratchov goto failed_mount; 21500d1ee42fSAlexandre Ratchov } 21510d1ee42fSAlexandre Ratchov } else 21520d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 2153ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2154ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2155b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2156617ba13bSMingming Cao goto cantfind_ext4; 2157617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2158ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2159617ba13bSMingming Cao goto cantfind_ext4; 2160ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2161ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 21620d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2163ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2164ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2165e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2166e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 2167ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2168ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2169ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2170ac27a0ecSDave Kleikamp 2171ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2172ac27a0ecSDave Kleikamp printk(KERN_ERR 2173617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 2174ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2175ac27a0ecSDave Kleikamp goto failed_mount; 2176ac27a0ecSDave Kleikamp } 2177ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2178ac27a0ecSDave Kleikamp printk(KERN_ERR 2179617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 2180ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2181ac27a0ecSDave Kleikamp goto failed_mount; 2182ac27a0ecSDave Kleikamp } 2183ac27a0ecSDave Kleikamp 2184bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2185ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2186617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 2187ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 2188ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 2189617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 2190ac27a0ecSDave Kleikamp "enabled\n"); 2191ac27a0ecSDave Kleikamp goto failed_mount; 2192ac27a0ecSDave Kleikamp } 2193ac27a0ecSDave Kleikamp 2194617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2195617ba13bSMingming Cao goto cantfind_ext4; 2196e7c95593SEric Sandeen 2197e7c95593SEric Sandeen /* ensure blocks_count calculation below doesn't sign-extend */ 2198e7c95593SEric Sandeen if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) < 2199e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block) + 1) { 2200e7c95593SEric Sandeen printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, " 2201e7c95593SEric Sandeen "first data block %u, blocks per group %lu\n", 2202e7c95593SEric Sandeen ext4_blocks_count(es), 2203e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 2204e7c95593SEric Sandeen EXT4_BLOCKS_PER_GROUP(sb)); 2205e7c95593SEric Sandeen goto failed_mount; 2206e7c95593SEric Sandeen } 2207bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2208bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2209bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2210bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 2211bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2212617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2213617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2214ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2215ac27a0ecSDave Kleikamp GFP_KERNEL); 2216ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2217617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: not enough memory\n"); 2218ac27a0ecSDave Kleikamp goto failed_mount; 2219ac27a0ecSDave Kleikamp } 2220ac27a0ecSDave Kleikamp 22219f6200bbSTheodore Ts'o if (ext4_proc_root) 22229f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 22239f6200bbSTheodore Ts'o 2224240799cdSTheodore Ts'o if (sbi->s_proc) 2225240799cdSTheodore Ts'o proc_create_data("inode_readahead_blks", 0644, sbi->s_proc, 2226240799cdSTheodore Ts'o &ext4_ui_proc_fops, 2227240799cdSTheodore Ts'o &sbi->s_inode_readahead_blks); 2228240799cdSTheodore Ts'o 2229ac27a0ecSDave Kleikamp bgl_lock_init(&sbi->s_blockgroup_lock); 2230ac27a0ecSDave Kleikamp 2231ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 223270bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2233ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2234ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2235617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: " 2236ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 2237ac27a0ecSDave Kleikamp db_count = i; 2238ac27a0ecSDave Kleikamp goto failed_mount2; 2239ac27a0ecSDave Kleikamp } 2240ac27a0ecSDave Kleikamp } 2241617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2242617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 2243ac27a0ecSDave Kleikamp goto failed_mount2; 2244ac27a0ecSDave Kleikamp } 2245772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2246772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2247772cb7c8SJose R. Santos printk(KERN_ERR 2248772cb7c8SJose R. Santos "EXT4-fs: unable to initialize " 2249772cb7c8SJose R. Santos "flex_bg meta info!\n"); 2250772cb7c8SJose R. Santos goto failed_mount2; 2251772cb7c8SJose R. Santos } 2252772cb7c8SJose R. Santos 2253ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2254ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2255ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2256ac27a0ecSDave Kleikamp 2257833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2258617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2259833f4077SPeter Zijlstra if (!err) { 2260833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2261617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2262833f4077SPeter Zijlstra } 2263833f4077SPeter Zijlstra if (!err) { 2264833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2265617ba13bSMingming Cao ext4_count_dirs(sb)); 2266833f4077SPeter Zijlstra } 22676bc6e63fSAneesh Kumar K.V if (!err) { 22686bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 22696bc6e63fSAneesh Kumar K.V } 2270833f4077SPeter Zijlstra if (err) { 2271833f4077SPeter Zijlstra printk(KERN_ERR "EXT4-fs: insufficient memory\n"); 2272833f4077SPeter Zijlstra goto failed_mount3; 2273833f4077SPeter Zijlstra } 2274ac27a0ecSDave Kleikamp 2275c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2276c9de560dSAlex Tomas 2277ac27a0ecSDave Kleikamp /* 2278ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2279ac27a0ecSDave Kleikamp */ 2280617ba13bSMingming Cao sb->s_op = &ext4_sops; 2281617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2282617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2283ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2284617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2285617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2286ac27a0ecSDave Kleikamp #endif 2287ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 2288ac27a0ecSDave Kleikamp 2289ac27a0ecSDave Kleikamp sb->s_root = NULL; 2290ac27a0ecSDave Kleikamp 2291ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2292617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2293617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2294ac27a0ecSDave Kleikamp 2295ac27a0ecSDave Kleikamp /* 2296ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2297ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2298ac27a0ecSDave Kleikamp */ 2299ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2300617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2301617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2302ac27a0ecSDave Kleikamp goto failed_mount3; 2303624080edSTheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && 2304624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit) { 2305624080edSTheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): " 2306624080edSTheodore Ts'o "ext4_fill_super: Journal transaction " 2307624080edSTheodore Ts'o "%u is corrupt\n", sb->s_id, 2308624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit); 2309624080edSTheodore Ts'o if (test_opt(sb, ERRORS_RO)) { 2310624080edSTheodore Ts'o printk(KERN_CRIT 2311624080edSTheodore Ts'o "Mounting filesystem read-only\n"); 2312624080edSTheodore Ts'o sb->s_flags |= MS_RDONLY; 2313624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2314624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2315624080edSTheodore Ts'o } 2316624080edSTheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) { 2317624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2318624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2319624080edSTheodore Ts'o ext4_commit_super(sb, es, 1); 2320624080edSTheodore Ts'o printk(KERN_CRIT 2321624080edSTheodore Ts'o "EXT4-fs (device %s): mount failed\n", 2322624080edSTheodore Ts'o sb->s_id); 2323624080edSTheodore Ts'o goto failed_mount4; 2324624080edSTheodore Ts'o } 2325624080edSTheodore Ts'o } 2326ac27a0ecSDave Kleikamp } else if (journal_inum) { 2327617ba13bSMingming Cao if (ext4_create_journal(sb, es, journal_inum)) 2328ac27a0ecSDave Kleikamp goto failed_mount3; 2329ac27a0ecSDave Kleikamp } else { 2330ac27a0ecSDave Kleikamp if (!silent) 2331ac27a0ecSDave Kleikamp printk(KERN_ERR 2332617ba13bSMingming Cao "ext4: No journal on filesystem on %s\n", 2333ac27a0ecSDave Kleikamp sb->s_id); 2334ac27a0ecSDave Kleikamp goto failed_mount3; 2335ac27a0ecSDave Kleikamp } 2336ac27a0ecSDave Kleikamp 2337eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2338eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2339eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2340eb40a09cSJose R. Santos printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); 2341eb40a09cSJose R. Santos goto failed_mount4; 2342eb40a09cSJose R. Santos } 2343eb40a09cSJose R. Santos 2344818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2345818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2346818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2347818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2348818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2349818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2350818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2351818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2352818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2353818d276cSGirish Shilamkar } else { 2354818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2355818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2356818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2357818d276cSGirish Shilamkar } 2358818d276cSGirish Shilamkar 2359ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2360ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2361ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2362ac27a0ecSDave Kleikamp case 0: 2363ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 236463f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 236563f57933SAndrew Morton * cope, else JOURNAL_DATA 236663f57933SAndrew Morton */ 2367dab291afSMingming Cao if (jbd2_journal_check_available_features 2368dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2369ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2370ac27a0ecSDave Kleikamp else 2371ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2372ac27a0ecSDave Kleikamp break; 2373ac27a0ecSDave Kleikamp 2374617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2375617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2376dab291afSMingming Cao if (!jbd2_journal_check_available_features 2377dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2378617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 2379ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 2380ac27a0ecSDave Kleikamp goto failed_mount4; 2381ac27a0ecSDave Kleikamp } 2382ac27a0ecSDave Kleikamp default: 2383ac27a0ecSDave Kleikamp break; 2384ac27a0ecSDave Kleikamp } 2385ac27a0ecSDave Kleikamp 2386ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2387617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2388617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 2389ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 2390ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2391ac27a0ecSDave Kleikamp } 2392ac27a0ecSDave Kleikamp } 2393ac27a0ecSDave Kleikamp /* 2394dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2395ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2396ac27a0ecSDave Kleikamp */ 2397ac27a0ecSDave Kleikamp 23981d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 23991d1fe1eeSDavid Howells if (IS_ERR(root)) { 2400617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 24011d1fe1eeSDavid Howells ret = PTR_ERR(root); 2402ac27a0ecSDave Kleikamp goto failed_mount4; 2403ac27a0ecSDave Kleikamp } 2404ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 24051d1fe1eeSDavid Howells iput(root); 2406617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 2407ac27a0ecSDave Kleikamp goto failed_mount4; 2408ac27a0ecSDave Kleikamp } 24091d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 24101d1fe1eeSDavid Howells if (!sb->s_root) { 24111d1fe1eeSDavid Howells printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); 24121d1fe1eeSDavid Howells iput(root); 24131d1fe1eeSDavid Howells ret = -ENOMEM; 24141d1fe1eeSDavid Howells goto failed_mount4; 24151d1fe1eeSDavid Howells } 2416ac27a0ecSDave Kleikamp 2417617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2418ef7f3835SKalpak Shah 2419ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2420ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2421ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2422ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2423ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2424ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2425ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2426ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2427ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2428ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2429ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2430ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2431ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2432ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2433ef7f3835SKalpak Shah } 2434ef7f3835SKalpak Shah } 2435ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2436ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2437ef7f3835SKalpak Shah sbi->s_inode_size) { 2438ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2439ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2440ef7f3835SKalpak Shah printk(KERN_INFO "EXT4-fs: required extra inode space not" 2441ef7f3835SKalpak Shah "available.\n"); 2442ef7f3835SKalpak Shah } 2443ef7f3835SKalpak Shah 2444ac27a0ecSDave Kleikamp /* 2445ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 2446ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 2447ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 2448ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 2449ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 2450ac27a0ecSDave Kleikamp * superblock lock. 2451ac27a0ecSDave Kleikamp */ 2452617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2453617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2454617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 2455ac27a0ecSDave Kleikamp if (needs_recovery) 2456617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: recovery complete.\n"); 2457617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 2458617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", 2459617ba13bSMingming Cao test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": 2460617ba13bSMingming Cao test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": 2461ac27a0ecSDave Kleikamp "writeback"); 2462ac27a0ecSDave Kleikamp 2463dd919b98SAneesh Kumar K.V if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2464dd919b98SAneesh Kumar K.V printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " 2465dd919b98SAneesh Kumar K.V "requested data journaling mode\n"); 2466dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 2467dd919b98SAneesh Kumar K.V } else if (test_opt(sb, DELALLOC)) 2468dd919b98SAneesh Kumar K.V printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); 2469dd919b98SAneesh Kumar K.V 2470a86c6181SAlex Tomas ext4_ext_init(sb); 2471c2ea3fdeSTheodore Ts'o err = ext4_mb_init(sb, needs_recovery); 2472c2ea3fdeSTheodore Ts'o if (err) { 2473c2ea3fdeSTheodore Ts'o printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", 2474c2ea3fdeSTheodore Ts'o err); 2475c2ea3fdeSTheodore Ts'o goto failed_mount4; 2476c2ea3fdeSTheodore Ts'o } 2477a86c6181SAlex Tomas 2478ac27a0ecSDave Kleikamp lock_kernel(); 2479ac27a0ecSDave Kleikamp return 0; 2480ac27a0ecSDave Kleikamp 2481617ba13bSMingming Cao cantfind_ext4: 2482ac27a0ecSDave Kleikamp if (!silent) 2483617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 2484ac27a0ecSDave Kleikamp sb->s_id); 2485ac27a0ecSDave Kleikamp goto failed_mount; 2486ac27a0ecSDave Kleikamp 2487ac27a0ecSDave Kleikamp failed_mount4: 2488dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 248947b4a50bSJan Kara sbi->s_journal = NULL; 2490ac27a0ecSDave Kleikamp failed_mount3: 2491ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2492ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2493ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 24946bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 2495ac27a0ecSDave Kleikamp failed_mount2: 2496ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2497ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2498ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2499ac27a0ecSDave Kleikamp failed_mount: 2500240799cdSTheodore Ts'o if (sbi->s_proc) { 2501240799cdSTheodore Ts'o remove_proc_entry("inode_readahead_blks", sbi->s_proc); 25029f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 2503240799cdSTheodore Ts'o } 2504ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2505ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2506ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2507ac27a0ecSDave Kleikamp #endif 2508617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2509ac27a0ecSDave Kleikamp brelse(bh); 2510ac27a0ecSDave Kleikamp out_fail: 2511ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2512ac27a0ecSDave Kleikamp kfree(sbi); 2513ac27a0ecSDave Kleikamp lock_kernel(); 25141d1fe1eeSDavid Howells return ret; 2515ac27a0ecSDave Kleikamp } 2516ac27a0ecSDave Kleikamp 2517ac27a0ecSDave Kleikamp /* 2518ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2519ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2520ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2521ac27a0ecSDave Kleikamp */ 2522617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2523ac27a0ecSDave Kleikamp { 2524617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2525ac27a0ecSDave Kleikamp 2526ac27a0ecSDave Kleikamp if (sbi->s_commit_interval) 2527ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 2528617ba13bSMingming Cao /* We could also set up an ext4-specific default for the commit 2529ac27a0ecSDave Kleikamp * interval here, but for now we'll just fall back to the jbd 2530ac27a0ecSDave Kleikamp * default. */ 2531ac27a0ecSDave Kleikamp 2532ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2533ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2534dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2535ac27a0ecSDave Kleikamp else 2536dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 2537ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2538ac27a0ecSDave Kleikamp } 2539ac27a0ecSDave Kleikamp 2540617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2541ac27a0ecSDave Kleikamp unsigned int journal_inum) 2542ac27a0ecSDave Kleikamp { 2543ac27a0ecSDave Kleikamp struct inode *journal_inode; 2544ac27a0ecSDave Kleikamp journal_t *journal; 2545ac27a0ecSDave Kleikamp 2546ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2547ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2548ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2549ac27a0ecSDave Kleikamp 25501d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 25511d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 2552617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 2553ac27a0ecSDave Kleikamp return NULL; 2554ac27a0ecSDave Kleikamp } 2555ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2556ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2557ac27a0ecSDave Kleikamp iput(journal_inode); 2558617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 2559ac27a0ecSDave Kleikamp return NULL; 2560ac27a0ecSDave Kleikamp } 2561ac27a0ecSDave Kleikamp 2562e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 2563ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 25641d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 2565617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 2566ac27a0ecSDave Kleikamp iput(journal_inode); 2567ac27a0ecSDave Kleikamp return NULL; 2568ac27a0ecSDave Kleikamp } 2569ac27a0ecSDave Kleikamp 2570dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2571ac27a0ecSDave Kleikamp if (!journal) { 2572617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 2573ac27a0ecSDave Kleikamp iput(journal_inode); 2574ac27a0ecSDave Kleikamp return NULL; 2575ac27a0ecSDave Kleikamp } 2576ac27a0ecSDave Kleikamp journal->j_private = sb; 2577617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2578ac27a0ecSDave Kleikamp return journal; 2579ac27a0ecSDave Kleikamp } 2580ac27a0ecSDave Kleikamp 2581617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 2582ac27a0ecSDave Kleikamp dev_t j_dev) 2583ac27a0ecSDave Kleikamp { 2584ac27a0ecSDave Kleikamp struct buffer_head *bh; 2585ac27a0ecSDave Kleikamp journal_t *journal; 2586617ba13bSMingming Cao ext4_fsblk_t start; 2587617ba13bSMingming Cao ext4_fsblk_t len; 2588ac27a0ecSDave Kleikamp int hblock, blocksize; 2589617ba13bSMingming Cao ext4_fsblk_t sb_block; 2590ac27a0ecSDave Kleikamp unsigned long offset; 2591617ba13bSMingming Cao struct ext4_super_block *es; 2592ac27a0ecSDave Kleikamp struct block_device *bdev; 2593ac27a0ecSDave Kleikamp 2594617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 2595ac27a0ecSDave Kleikamp if (bdev == NULL) 2596ac27a0ecSDave Kleikamp return NULL; 2597ac27a0ecSDave Kleikamp 2598ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 2599ac27a0ecSDave Kleikamp printk(KERN_ERR 2600617ba13bSMingming Cao "EXT4: failed to claim external journal device.\n"); 2601ac27a0ecSDave Kleikamp blkdev_put(bdev); 2602ac27a0ecSDave Kleikamp return NULL; 2603ac27a0ecSDave Kleikamp } 2604ac27a0ecSDave Kleikamp 2605ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2606ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2607ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2608ac27a0ecSDave Kleikamp printk(KERN_ERR 2609617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2610ac27a0ecSDave Kleikamp goto out_bdev; 2611ac27a0ecSDave Kleikamp } 2612ac27a0ecSDave Kleikamp 2613617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2614617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2615ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2616ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2617617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2618ac27a0ecSDave Kleikamp "external journal\n"); 2619ac27a0ecSDave Kleikamp goto out_bdev; 2620ac27a0ecSDave Kleikamp } 2621ac27a0ecSDave Kleikamp 2622617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2623617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2624ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2625617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 2626617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 2627ac27a0ecSDave Kleikamp "bad superblock\n"); 2628ac27a0ecSDave Kleikamp brelse(bh); 2629ac27a0ecSDave Kleikamp goto out_bdev; 2630ac27a0ecSDave Kleikamp } 2631ac27a0ecSDave Kleikamp 2632617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 2633617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 2634ac27a0ecSDave Kleikamp brelse(bh); 2635ac27a0ecSDave Kleikamp goto out_bdev; 2636ac27a0ecSDave Kleikamp } 2637ac27a0ecSDave Kleikamp 2638bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 2639ac27a0ecSDave Kleikamp start = sb_block + 1; 2640ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 2641ac27a0ecSDave Kleikamp 2642dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 2643ac27a0ecSDave Kleikamp start, len, blocksize); 2644ac27a0ecSDave Kleikamp if (!journal) { 2645617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 2646ac27a0ecSDave Kleikamp goto out_bdev; 2647ac27a0ecSDave Kleikamp } 2648ac27a0ecSDave Kleikamp journal->j_private = sb; 2649ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 2650ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 2651ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 2652617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 2653ac27a0ecSDave Kleikamp goto out_journal; 2654ac27a0ecSDave Kleikamp } 2655ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 2656617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 2657ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 2658ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 2659ac27a0ecSDave Kleikamp goto out_journal; 2660ac27a0ecSDave Kleikamp } 2661617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 2662617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2663ac27a0ecSDave Kleikamp return journal; 2664ac27a0ecSDave Kleikamp out_journal: 2665dab291afSMingming Cao jbd2_journal_destroy(journal); 2666ac27a0ecSDave Kleikamp out_bdev: 2667617ba13bSMingming Cao ext4_blkdev_put(bdev); 2668ac27a0ecSDave Kleikamp return NULL; 2669ac27a0ecSDave Kleikamp } 2670ac27a0ecSDave Kleikamp 2671617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 2672617ba13bSMingming Cao struct ext4_super_block *es, 2673ac27a0ecSDave Kleikamp unsigned long journal_devnum) 2674ac27a0ecSDave Kleikamp { 2675ac27a0ecSDave Kleikamp journal_t *journal; 2676ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 2677ac27a0ecSDave Kleikamp dev_t journal_dev; 2678ac27a0ecSDave Kleikamp int err = 0; 2679ac27a0ecSDave Kleikamp int really_read_only; 2680ac27a0ecSDave Kleikamp 2681ac27a0ecSDave Kleikamp if (journal_devnum && 2682ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2683617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 2684ac27a0ecSDave Kleikamp "numbers have changed\n"); 2685ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 2686ac27a0ecSDave Kleikamp } else 2687ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 2688ac27a0ecSDave Kleikamp 2689ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 2690ac27a0ecSDave Kleikamp 2691ac27a0ecSDave Kleikamp /* 2692ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 2693ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 2694ac27a0ecSDave Kleikamp * can get read-write access to the device. 2695ac27a0ecSDave Kleikamp */ 2696ac27a0ecSDave Kleikamp 2697617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2698ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2699617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 2700ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 2701ac27a0ecSDave Kleikamp if (really_read_only) { 2702617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 2703ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 2704ac27a0ecSDave Kleikamp return -EROFS; 2705ac27a0ecSDave Kleikamp } 2706617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: write access will " 2707ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 2708ac27a0ecSDave Kleikamp } 2709ac27a0ecSDave Kleikamp } 2710ac27a0ecSDave Kleikamp 2711ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 2712617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 2713ac27a0ecSDave Kleikamp "and inode journals!\n"); 2714ac27a0ecSDave Kleikamp return -EINVAL; 2715ac27a0ecSDave Kleikamp } 2716ac27a0ecSDave Kleikamp 2717ac27a0ecSDave Kleikamp if (journal_inum) { 2718617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2719ac27a0ecSDave Kleikamp return -EINVAL; 2720ac27a0ecSDave Kleikamp } else { 2721617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 2722ac27a0ecSDave Kleikamp return -EINVAL; 2723ac27a0ecSDave Kleikamp } 2724ac27a0ecSDave Kleikamp 27254776004fSTheodore Ts'o if (journal->j_flags & JBD2_BARRIER) 27264776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers enabled\n"); 27274776004fSTheodore Ts'o else 27284776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers disabled\n"); 27294776004fSTheodore Ts'o 2730ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 2731dab291afSMingming Cao err = jbd2_journal_update_format(journal); 2732ac27a0ecSDave Kleikamp if (err) { 2733617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 2734dab291afSMingming Cao jbd2_journal_destroy(journal); 2735ac27a0ecSDave Kleikamp return err; 2736ac27a0ecSDave Kleikamp } 2737ac27a0ecSDave Kleikamp } 2738ac27a0ecSDave Kleikamp 2739617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 2740dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 2741ac27a0ecSDave Kleikamp if (!err) 2742dab291afSMingming Cao err = jbd2_journal_load(journal); 2743ac27a0ecSDave Kleikamp 2744ac27a0ecSDave Kleikamp if (err) { 2745617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 2746dab291afSMingming Cao jbd2_journal_destroy(journal); 2747ac27a0ecSDave Kleikamp return err; 2748ac27a0ecSDave Kleikamp } 2749ac27a0ecSDave Kleikamp 2750617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2751617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2752ac27a0ecSDave Kleikamp 2753ac27a0ecSDave Kleikamp if (journal_devnum && 2754ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2755ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 2756ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2757ac27a0ecSDave Kleikamp 2758ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2759617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2760ac27a0ecSDave Kleikamp } 2761ac27a0ecSDave Kleikamp 2762ac27a0ecSDave Kleikamp return 0; 2763ac27a0ecSDave Kleikamp } 2764ac27a0ecSDave Kleikamp 2765617ba13bSMingming Cao static int ext4_create_journal(struct super_block *sb, 2766617ba13bSMingming Cao struct ext4_super_block *es, 2767ac27a0ecSDave Kleikamp unsigned int journal_inum) 2768ac27a0ecSDave Kleikamp { 2769ac27a0ecSDave Kleikamp journal_t *journal; 27706c675bd4SBorislav Petkov int err; 2771ac27a0ecSDave Kleikamp 2772ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2773617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " 2774ac27a0ecSDave Kleikamp "create journal.\n"); 2775ac27a0ecSDave Kleikamp return -EROFS; 2776ac27a0ecSDave Kleikamp } 2777ac27a0ecSDave Kleikamp 27786c675bd4SBorislav Petkov journal = ext4_get_journal(sb, journal_inum); 27796c675bd4SBorislav Petkov if (!journal) 2780ac27a0ecSDave Kleikamp return -EINVAL; 2781ac27a0ecSDave Kleikamp 2782617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", 2783ac27a0ecSDave Kleikamp journal_inum); 2784ac27a0ecSDave Kleikamp 27856c675bd4SBorislav Petkov err = jbd2_journal_create(journal); 27866c675bd4SBorislav Petkov if (err) { 2787617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error creating journal.\n"); 2788dab291afSMingming Cao jbd2_journal_destroy(journal); 2789ac27a0ecSDave Kleikamp return -EIO; 2790ac27a0ecSDave Kleikamp } 2791ac27a0ecSDave Kleikamp 2792617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2793ac27a0ecSDave Kleikamp 2794617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 2795617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2796617ba13bSMingming Cao EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); 2797ac27a0ecSDave Kleikamp 2798ac27a0ecSDave Kleikamp es->s_journal_inum = cpu_to_le32(journal_inum); 2799ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2800ac27a0ecSDave Kleikamp 2801ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2802617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2803ac27a0ecSDave Kleikamp 2804ac27a0ecSDave Kleikamp return 0; 2805ac27a0ecSDave Kleikamp } 2806ac27a0ecSDave Kleikamp 2807617ba13bSMingming Cao static void ext4_commit_super(struct super_block *sb, 28082b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync) 2809ac27a0ecSDave Kleikamp { 2810617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 2811ac27a0ecSDave Kleikamp 2812ac27a0ecSDave Kleikamp if (!sbh) 2813ac27a0ecSDave Kleikamp return; 2814914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 2815914258bfSTheodore Ts'o /* 2816914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 2817914258bfSTheodore Ts'o * superblock failed. This could happen because the 2818914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 2819914258bfSTheodore Ts'o * be a transient write error and maybe the block will 2820914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 2821914258bfSTheodore Ts'o * write and hope for the best. 2822914258bfSTheodore Ts'o */ 2823914258bfSTheodore Ts'o printk(KERN_ERR "ext4: previous I/O error to " 2824914258bfSTheodore Ts'o "superblock detected for %s.\n", sb->s_id); 2825914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 2826914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 2827914258bfSTheodore Ts'o } 2828ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 2829bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); 2830617ba13bSMingming Cao es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 2831ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 2832ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 2833914258bfSTheodore Ts'o if (sync) { 2834ac27a0ecSDave Kleikamp sync_dirty_buffer(sbh); 2835914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 2836914258bfSTheodore Ts'o printk(KERN_ERR "ext4: I/O error while writing " 2837914258bfSTheodore Ts'o "superblock for %s.\n", sb->s_id); 2838914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 2839914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 2840914258bfSTheodore Ts'o } 2841914258bfSTheodore Ts'o } 2842ac27a0ecSDave Kleikamp } 2843ac27a0ecSDave Kleikamp 2844ac27a0ecSDave Kleikamp 2845ac27a0ecSDave Kleikamp /* 2846ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 2847ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 2848ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 2849ac27a0ecSDave Kleikamp */ 2850617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 2851617ba13bSMingming Cao struct ext4_super_block *es) 2852ac27a0ecSDave Kleikamp { 2853617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2854ac27a0ecSDave Kleikamp 2855dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2856dab291afSMingming Cao jbd2_journal_flush(journal); 285732c37730SJan Kara lock_super(sb); 2858617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 2859ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 2860617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2861ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2862617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2863ac27a0ecSDave Kleikamp } 286432c37730SJan Kara unlock_super(sb); 2865dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 2866ac27a0ecSDave Kleikamp } 2867ac27a0ecSDave Kleikamp 2868ac27a0ecSDave Kleikamp /* 2869ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 2870ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 2871ac27a0ecSDave Kleikamp * main filesystem now. 2872ac27a0ecSDave Kleikamp */ 2873617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 2874617ba13bSMingming Cao struct ext4_super_block *es) 2875ac27a0ecSDave Kleikamp { 2876ac27a0ecSDave Kleikamp journal_t *journal; 2877ac27a0ecSDave Kleikamp int j_errno; 2878ac27a0ecSDave Kleikamp const char *errstr; 2879ac27a0ecSDave Kleikamp 2880617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2881ac27a0ecSDave Kleikamp 2882ac27a0ecSDave Kleikamp /* 2883ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 2884617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 2885ac27a0ecSDave Kleikamp */ 2886ac27a0ecSDave Kleikamp 2887dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 2888ac27a0ecSDave Kleikamp if (j_errno) { 2889ac27a0ecSDave Kleikamp char nbuf[16]; 2890ac27a0ecSDave Kleikamp 2891617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 289246e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 2893ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 289446e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 2895ac27a0ecSDave Kleikamp "filesystem check."); 2896ac27a0ecSDave Kleikamp 2897617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2898617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2899617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2900ac27a0ecSDave Kleikamp 2901dab291afSMingming Cao jbd2_journal_clear_err(journal); 2902ac27a0ecSDave Kleikamp } 2903ac27a0ecSDave Kleikamp } 2904ac27a0ecSDave Kleikamp 2905ac27a0ecSDave Kleikamp /* 2906ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 2907ac27a0ecSDave Kleikamp * and wait on the commit. 2908ac27a0ecSDave Kleikamp */ 2909617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 2910ac27a0ecSDave Kleikamp { 2911ac27a0ecSDave Kleikamp journal_t *journal; 2912ac27a0ecSDave Kleikamp int ret; 2913ac27a0ecSDave Kleikamp 2914ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 2915ac27a0ecSDave Kleikamp return 0; 2916ac27a0ecSDave Kleikamp 2917617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2918ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2919617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 2920ac27a0ecSDave Kleikamp return ret; 2921ac27a0ecSDave Kleikamp } 2922ac27a0ecSDave Kleikamp 2923ac27a0ecSDave Kleikamp /* 2924617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 2925ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 2926ac27a0ecSDave Kleikamp * point. Just start an async writeback to get the buffers on their way 2927ac27a0ecSDave Kleikamp * to the disk. 2928ac27a0ecSDave Kleikamp * 2929ac27a0ecSDave Kleikamp * This implicitly triggers the writebehind on sync(). 2930ac27a0ecSDave Kleikamp */ 2931ac27a0ecSDave Kleikamp 2932617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 2933ac27a0ecSDave Kleikamp { 2934ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 2935ac27a0ecSDave Kleikamp BUG(); 2936ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2937ac27a0ecSDave Kleikamp } 2938ac27a0ecSDave Kleikamp 2939617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 2940ac27a0ecSDave Kleikamp { 2941ac27a0ecSDave Kleikamp tid_t target; 2942ac27a0ecSDave Kleikamp 2943ede86cc4STheodore Ts'o trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); 2944ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2945dab291afSMingming Cao if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { 2946ac27a0ecSDave Kleikamp if (wait) 2947dab291afSMingming Cao jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); 2948ac27a0ecSDave Kleikamp } 2949ac27a0ecSDave Kleikamp return 0; 2950ac27a0ecSDave Kleikamp } 2951ac27a0ecSDave Kleikamp 2952ac27a0ecSDave Kleikamp /* 2953ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 2954ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 2955ac27a0ecSDave Kleikamp */ 2956617ba13bSMingming Cao static void ext4_write_super_lockfs(struct super_block *sb) 2957ac27a0ecSDave Kleikamp { 2958ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2959ac27a0ecSDave Kleikamp 2960ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2961617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2962ac27a0ecSDave Kleikamp 2963ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 2964dab291afSMingming Cao jbd2_journal_lock_updates(journal); 2965dab291afSMingming Cao jbd2_journal_flush(journal); 2966ac27a0ecSDave Kleikamp 2967ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 2968617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2969617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2970ac27a0ecSDave Kleikamp } 2971ac27a0ecSDave Kleikamp } 2972ac27a0ecSDave Kleikamp 2973ac27a0ecSDave Kleikamp /* 2974ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 2975ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 2976ac27a0ecSDave Kleikamp */ 2977617ba13bSMingming Cao static void ext4_unlockfs(struct super_block *sb) 2978ac27a0ecSDave Kleikamp { 2979ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 2980ac27a0ecSDave Kleikamp lock_super(sb); 2981ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 2982617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2983617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 2984ac27a0ecSDave Kleikamp unlock_super(sb); 2985dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 2986ac27a0ecSDave Kleikamp } 2987ac27a0ecSDave Kleikamp } 2988ac27a0ecSDave Kleikamp 2989617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 2990ac27a0ecSDave Kleikamp { 2991617ba13bSMingming Cao struct ext4_super_block *es; 2992617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2993617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 2994ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 2995617ba13bSMingming Cao struct ext4_mount_options old_opts; 29968a266467STheodore Ts'o ext4_group_t g; 2997ac27a0ecSDave Kleikamp int err; 2998ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2999ac27a0ecSDave Kleikamp int i; 3000ac27a0ecSDave Kleikamp #endif 3001ac27a0ecSDave Kleikamp 3002ac27a0ecSDave Kleikamp /* Store the original options */ 3003ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3004ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3005ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3006ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3007ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 3008ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3009ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3010ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3011ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3012ac27a0ecSDave Kleikamp #endif 3013ac27a0ecSDave Kleikamp 3014ac27a0ecSDave Kleikamp /* 3015ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3016ac27a0ecSDave Kleikamp */ 3017ac27a0ecSDave Kleikamp if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { 3018ac27a0ecSDave Kleikamp err = -EINVAL; 3019ac27a0ecSDave Kleikamp goto restore_opts; 3020ac27a0ecSDave Kleikamp } 3021ac27a0ecSDave Kleikamp 3022617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 302346e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3024ac27a0ecSDave Kleikamp 3025ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3026617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 3027ac27a0ecSDave Kleikamp 3028ac27a0ecSDave Kleikamp es = sbi->s_es; 3029ac27a0ecSDave Kleikamp 3030617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3031ac27a0ecSDave Kleikamp 3032ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3033bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 3034617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 3035ac27a0ecSDave Kleikamp err = -EROFS; 3036ac27a0ecSDave Kleikamp goto restore_opts; 3037ac27a0ecSDave Kleikamp } 3038ac27a0ecSDave Kleikamp 3039ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3040ac27a0ecSDave Kleikamp /* 3041ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3042ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3043ac27a0ecSDave Kleikamp */ 3044ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3045ac27a0ecSDave Kleikamp 3046ac27a0ecSDave Kleikamp /* 3047ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3048ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3049ac27a0ecSDave Kleikamp * mark the partition as valid again. 3050ac27a0ecSDave Kleikamp */ 3051617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3052617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3053ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3054ac27a0ecSDave Kleikamp 305532c37730SJan Kara /* 305632c37730SJan Kara * We have to unlock super so that we can wait for 305732c37730SJan Kara * transactions. 305832c37730SJan Kara */ 305932c37730SJan Kara unlock_super(sb); 3060617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 306132c37730SJan Kara lock_super(sb); 3062ac27a0ecSDave Kleikamp } else { 3063ac27a0ecSDave Kleikamp __le32 ret; 3064617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3065617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 3066617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3067ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 3068ac27a0ecSDave Kleikamp "optional features (%x).\n", 3069ac27a0ecSDave Kleikamp sb->s_id, le32_to_cpu(ret)); 3070ac27a0ecSDave Kleikamp err = -EROFS; 3071ac27a0ecSDave Kleikamp goto restore_opts; 3072ac27a0ecSDave Kleikamp } 3073ead6596bSEric Sandeen 3074ead6596bSEric Sandeen /* 30758a266467STheodore Ts'o * Make sure the group descriptor checksums 30768a266467STheodore Ts'o * are sane. If they aren't, refuse to 30778a266467STheodore Ts'o * remount r/w. 30788a266467STheodore Ts'o */ 30798a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 30808a266467STheodore Ts'o struct ext4_group_desc *gdp = 30818a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 30828a266467STheodore Ts'o 30838a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 30848a266467STheodore Ts'o printk(KERN_ERR 30858a266467STheodore Ts'o "EXT4-fs: ext4_remount: " 30868a266467STheodore Ts'o "Checksum for group %lu failed (%u!=%u)\n", 30878a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 30888a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 30898a266467STheodore Ts'o err = -EINVAL; 30908a266467STheodore Ts'o goto restore_opts; 30918a266467STheodore Ts'o } 30928a266467STheodore Ts'o } 30938a266467STheodore Ts'o 30948a266467STheodore Ts'o /* 3095ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3096ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3097ead6596bSEric Sandeen * require a full umount/remount for now. 3098ead6596bSEric Sandeen */ 3099ead6596bSEric Sandeen if (es->s_last_orphan) { 3100ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3101ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3102ead6596bSEric Sandeen "orphan inode list. Please " 3103ead6596bSEric Sandeen "umount/remount instead.\n", 3104ead6596bSEric Sandeen sb->s_id); 3105ead6596bSEric Sandeen err = -EINVAL; 3106ead6596bSEric Sandeen goto restore_opts; 3107ead6596bSEric Sandeen } 3108ead6596bSEric Sandeen 3109ac27a0ecSDave Kleikamp /* 3110ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3111ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3112ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3113ac27a0ecSDave Kleikamp * the partition.) 3114ac27a0ecSDave Kleikamp */ 3115617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3116ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3117617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3118ac27a0ecSDave Kleikamp goto restore_opts; 3119617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3120ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3121ac27a0ecSDave Kleikamp } 3122ac27a0ecSDave Kleikamp } 3123ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3124ac27a0ecSDave Kleikamp /* Release old quota file names */ 3125ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3126ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3127ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3128ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3129ac27a0ecSDave Kleikamp #endif 3130ac27a0ecSDave Kleikamp return 0; 3131ac27a0ecSDave Kleikamp restore_opts: 3132ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3133ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3134ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3135ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3136ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 3137ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3138ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3139ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3140ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3141ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3142ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3143ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3144ac27a0ecSDave Kleikamp } 3145ac27a0ecSDave Kleikamp #endif 3146ac27a0ecSDave Kleikamp return err; 3147ac27a0ecSDave Kleikamp } 3148ac27a0ecSDave Kleikamp 3149617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3150ac27a0ecSDave Kleikamp { 3151ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3152617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3153617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3154960cc398SPekka Enberg u64 fsid; 3155ac27a0ecSDave Kleikamp 31565e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 31575e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 31586bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 3159fd2d4291SAvantika Mathur ext4_group_t ngroups = sbi->s_groups_count, i; 31605e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3161ac27a0ecSDave Kleikamp smp_rmb(); 3162ac27a0ecSDave Kleikamp 3163ac27a0ecSDave Kleikamp /* 31645e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 31655e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 31665e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3167ac27a0ecSDave Kleikamp */ 3168ac27a0ecSDave Kleikamp 3169ac27a0ecSDave Kleikamp /* 3170ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3171ac27a0ecSDave Kleikamp * overhead 3172ac27a0ecSDave Kleikamp */ 3173ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3174ac27a0ecSDave Kleikamp 3175ac27a0ecSDave Kleikamp /* 3176ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3177ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3178ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3179ac27a0ecSDave Kleikamp */ 3180ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3181617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3182617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3183ac27a0ecSDave Kleikamp cond_resched(); 3184ac27a0ecSDave Kleikamp } 3185ac27a0ecSDave Kleikamp 3186ac27a0ecSDave Kleikamp /* 3187ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3188ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3189ac27a0ecSDave Kleikamp */ 31905e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 31915e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 31925e70030dSBadari Pulavarty smp_wmb(); 31936bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3194ac27a0ecSDave Kleikamp } 3195ac27a0ecSDave Kleikamp 3196617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3197ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 31985e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 31996bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 32006bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3201308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 3202bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3203bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3204ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3205ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 320652d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 32075e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3208617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3209960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3210960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3211960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3212960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 3213ac27a0ecSDave Kleikamp return 0; 3214ac27a0ecSDave Kleikamp } 3215ac27a0ecSDave Kleikamp 3216ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 3217ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 3218ac27a0ecSDave Kleikamp * Process 1 Process 2 3219617ba13bSMingming Cao * ext4_create() quota_sync() 3220dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3221ac27a0ecSDave Kleikamp * DQUOT_INIT() down(dqio_mutex) 3222dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3223ac27a0ecSDave Kleikamp * 3224ac27a0ecSDave Kleikamp */ 3225ac27a0ecSDave Kleikamp 3226ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3227ac27a0ecSDave Kleikamp 3228ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3229ac27a0ecSDave Kleikamp { 3230ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3231ac27a0ecSDave Kleikamp } 3232ac27a0ecSDave Kleikamp 3233617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type) 3234ac27a0ecSDave Kleikamp { 3235ac27a0ecSDave Kleikamp handle_t *handle; 3236ac27a0ecSDave Kleikamp int ret, err; 3237ac27a0ecSDave Kleikamp 3238ac27a0ecSDave Kleikamp /* We may create quota structure so we need to reserve enough blocks */ 3239617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); 3240ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3241ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3242ac27a0ecSDave Kleikamp ret = dquot_initialize(inode, type); 3243617ba13bSMingming Cao err = ext4_journal_stop(handle); 3244ac27a0ecSDave Kleikamp if (!ret) 3245ac27a0ecSDave Kleikamp ret = err; 3246ac27a0ecSDave Kleikamp return ret; 3247ac27a0ecSDave Kleikamp } 3248ac27a0ecSDave Kleikamp 3249617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode) 3250ac27a0ecSDave Kleikamp { 3251ac27a0ecSDave Kleikamp handle_t *handle; 3252ac27a0ecSDave Kleikamp int ret, err; 3253ac27a0ecSDave Kleikamp 3254ac27a0ecSDave Kleikamp /* We may delete quota structure so we need to reserve enough blocks */ 3255617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); 32562887df13SJan Kara if (IS_ERR(handle)) { 32572887df13SJan Kara /* 32582887df13SJan Kara * We call dquot_drop() anyway to at least release references 32592887df13SJan Kara * to quota structures so that umount does not hang. 32602887df13SJan Kara */ 32612887df13SJan Kara dquot_drop(inode); 3262ac27a0ecSDave Kleikamp return PTR_ERR(handle); 32632887df13SJan Kara } 3264ac27a0ecSDave Kleikamp ret = dquot_drop(inode); 3265617ba13bSMingming Cao err = ext4_journal_stop(handle); 3266ac27a0ecSDave Kleikamp if (!ret) 3267ac27a0ecSDave Kleikamp ret = err; 3268ac27a0ecSDave Kleikamp return ret; 3269ac27a0ecSDave Kleikamp } 3270ac27a0ecSDave Kleikamp 3271617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3272ac27a0ecSDave Kleikamp { 3273ac27a0ecSDave Kleikamp int ret, err; 3274ac27a0ecSDave Kleikamp handle_t *handle; 3275ac27a0ecSDave Kleikamp struct inode *inode; 3276ac27a0ecSDave Kleikamp 3277ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3278617ba13bSMingming Cao handle = ext4_journal_start(inode, 3279617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3280ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3281ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3282ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3283617ba13bSMingming Cao err = ext4_journal_stop(handle); 3284ac27a0ecSDave Kleikamp if (!ret) 3285ac27a0ecSDave Kleikamp ret = err; 3286ac27a0ecSDave Kleikamp return ret; 3287ac27a0ecSDave Kleikamp } 3288ac27a0ecSDave Kleikamp 3289617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3290ac27a0ecSDave Kleikamp { 3291ac27a0ecSDave Kleikamp int ret, err; 3292ac27a0ecSDave Kleikamp handle_t *handle; 3293ac27a0ecSDave Kleikamp 3294617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3295617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3296ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3297ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3298ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3299617ba13bSMingming Cao err = ext4_journal_stop(handle); 3300ac27a0ecSDave Kleikamp if (!ret) 3301ac27a0ecSDave Kleikamp ret = err; 3302ac27a0ecSDave Kleikamp return ret; 3303ac27a0ecSDave Kleikamp } 3304ac27a0ecSDave Kleikamp 3305617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3306ac27a0ecSDave Kleikamp { 3307ac27a0ecSDave Kleikamp int ret, err; 3308ac27a0ecSDave Kleikamp handle_t *handle; 3309ac27a0ecSDave Kleikamp 3310617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3311617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 33129c3013e9SJan Kara if (IS_ERR(handle)) { 33139c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 33149c3013e9SJan Kara dquot_release(dquot); 3315ac27a0ecSDave Kleikamp return PTR_ERR(handle); 33169c3013e9SJan Kara } 3317ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3318617ba13bSMingming Cao err = ext4_journal_stop(handle); 3319ac27a0ecSDave Kleikamp if (!ret) 3320ac27a0ecSDave Kleikamp ret = err; 3321ac27a0ecSDave Kleikamp return ret; 3322ac27a0ecSDave Kleikamp } 3323ac27a0ecSDave Kleikamp 3324617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3325ac27a0ecSDave Kleikamp { 33262c8be6b2SJan Kara /* Are we journaling quotas? */ 3327617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3328617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3329ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3330617ba13bSMingming Cao return ext4_write_dquot(dquot); 3331ac27a0ecSDave Kleikamp } else { 3332ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3333ac27a0ecSDave Kleikamp } 3334ac27a0ecSDave Kleikamp } 3335ac27a0ecSDave Kleikamp 3336617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3337ac27a0ecSDave Kleikamp { 3338ac27a0ecSDave Kleikamp int ret, err; 3339ac27a0ecSDave Kleikamp handle_t *handle; 3340ac27a0ecSDave Kleikamp 3341ac27a0ecSDave Kleikamp /* Data block + inode block */ 3342617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3343ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3344ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3345ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3346617ba13bSMingming Cao err = ext4_journal_stop(handle); 3347ac27a0ecSDave Kleikamp if (!ret) 3348ac27a0ecSDave Kleikamp ret = err; 3349ac27a0ecSDave Kleikamp return ret; 3350ac27a0ecSDave Kleikamp } 3351ac27a0ecSDave Kleikamp 3352ac27a0ecSDave Kleikamp /* 3353ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3354ac27a0ecSDave Kleikamp * the quota file and such... 3355ac27a0ecSDave Kleikamp */ 3356617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3357ac27a0ecSDave Kleikamp { 3358617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3359617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3360ac27a0ecSDave Kleikamp } 3361ac27a0ecSDave Kleikamp 3362ac27a0ecSDave Kleikamp /* 3363ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3364ac27a0ecSDave Kleikamp */ 3365617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 33666f28e087SJan Kara char *path, int remount) 3367ac27a0ecSDave Kleikamp { 3368ac27a0ecSDave Kleikamp int err; 3369ac27a0ecSDave Kleikamp struct nameidata nd; 3370ac27a0ecSDave Kleikamp 3371ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3372ac27a0ecSDave Kleikamp return -EINVAL; 33730623543bSJan Kara /* When remounting, no checks are needed and in fact, path is NULL */ 33740623543bSJan Kara if (remount) 33756f28e087SJan Kara return vfs_quota_on(sb, type, format_id, path, remount); 33760623543bSJan Kara 3377ac27a0ecSDave Kleikamp err = path_lookup(path, LOOKUP_FOLLOW, &nd); 3378ac27a0ecSDave Kleikamp if (err) 3379ac27a0ecSDave Kleikamp return err; 33800623543bSJan Kara 3381ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 33824ac91378SJan Blunck if (nd.path.mnt->mnt_sb != sb) { 33831d957f9bSJan Blunck path_put(&nd.path); 3384ac27a0ecSDave Kleikamp return -EXDEV; 3385ac27a0ecSDave Kleikamp } 33860623543bSJan Kara /* Journaling quota? */ 33870623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 33882b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 33894ac91378SJan Blunck if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode) 3390ac27a0ecSDave Kleikamp printk(KERN_WARNING 3391617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 33920623543bSJan Kara "Journaled quota will not work.\n"); 33930623543bSJan Kara } 33940623543bSJan Kara 33950623543bSJan Kara /* 33960623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 33970623543bSJan Kara * all updates to the file when we bypass pagecache... 33980623543bSJan Kara */ 33990623543bSJan Kara if (ext4_should_journal_data(nd.path.dentry->d_inode)) { 34000623543bSJan Kara /* 34010623543bSJan Kara * We don't need to lock updates but journal_flush() could 34020623543bSJan Kara * otherwise be livelocked... 34030623543bSJan Kara */ 34040623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 34050623543bSJan Kara jbd2_journal_flush(EXT4_SB(sb)->s_journal); 34060623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 34070623543bSJan Kara } 34080623543bSJan Kara 340977e69dacSAl Viro err = vfs_quota_on_path(sb, type, format_id, &nd.path); 34101d957f9bSJan Blunck path_put(&nd.path); 341177e69dacSAl Viro return err; 3412ac27a0ecSDave Kleikamp } 3413ac27a0ecSDave Kleikamp 3414ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3415ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3416ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3417ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3418617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3419ac27a0ecSDave Kleikamp size_t len, loff_t off) 3420ac27a0ecSDave Kleikamp { 3421ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3422725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3423ac27a0ecSDave Kleikamp int err = 0; 3424ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3425ac27a0ecSDave Kleikamp int tocopy; 3426ac27a0ecSDave Kleikamp size_t toread; 3427ac27a0ecSDave Kleikamp struct buffer_head *bh; 3428ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3429ac27a0ecSDave Kleikamp 3430ac27a0ecSDave Kleikamp if (off > i_size) 3431ac27a0ecSDave Kleikamp return 0; 3432ac27a0ecSDave Kleikamp if (off+len > i_size) 3433ac27a0ecSDave Kleikamp len = i_size-off; 3434ac27a0ecSDave Kleikamp toread = len; 3435ac27a0ecSDave Kleikamp while (toread > 0) { 3436ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3437ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3438617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3439ac27a0ecSDave Kleikamp if (err) 3440ac27a0ecSDave Kleikamp return err; 3441ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3442ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3443ac27a0ecSDave Kleikamp else 3444ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3445ac27a0ecSDave Kleikamp brelse(bh); 3446ac27a0ecSDave Kleikamp offset = 0; 3447ac27a0ecSDave Kleikamp toread -= tocopy; 3448ac27a0ecSDave Kleikamp data += tocopy; 3449ac27a0ecSDave Kleikamp blk++; 3450ac27a0ecSDave Kleikamp } 3451ac27a0ecSDave Kleikamp return len; 3452ac27a0ecSDave Kleikamp } 3453ac27a0ecSDave Kleikamp 3454ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3455ac27a0ecSDave Kleikamp * enough credits) */ 3456617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3457ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3458ac27a0ecSDave Kleikamp { 3459ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3460725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3461ac27a0ecSDave Kleikamp int err = 0; 3462ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3463ac27a0ecSDave Kleikamp int tocopy; 3464617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3465ac27a0ecSDave Kleikamp size_t towrite = len; 3466ac27a0ecSDave Kleikamp struct buffer_head *bh; 3467ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3468ac27a0ecSDave Kleikamp 34699c3013e9SJan Kara if (!handle) { 3470e5f8eab8STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" 34719c3013e9SJan Kara " cancelled because transaction is not started.\n", 34729c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 34739c3013e9SJan Kara return -EIO; 34749c3013e9SJan Kara } 3475ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3476ac27a0ecSDave Kleikamp while (towrite > 0) { 3477ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3478ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3479617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3480ac27a0ecSDave Kleikamp if (!bh) 3481ac27a0ecSDave Kleikamp goto out; 3482ac27a0ecSDave Kleikamp if (journal_quota) { 3483617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3484ac27a0ecSDave Kleikamp if (err) { 3485ac27a0ecSDave Kleikamp brelse(bh); 3486ac27a0ecSDave Kleikamp goto out; 3487ac27a0ecSDave Kleikamp } 3488ac27a0ecSDave Kleikamp } 3489ac27a0ecSDave Kleikamp lock_buffer(bh); 3490ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3491ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3492ac27a0ecSDave Kleikamp unlock_buffer(bh); 3493ac27a0ecSDave Kleikamp if (journal_quota) 3494617ba13bSMingming Cao err = ext4_journal_dirty_metadata(handle, bh); 3495ac27a0ecSDave Kleikamp else { 3496ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3497678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3498ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3499ac27a0ecSDave Kleikamp } 3500ac27a0ecSDave Kleikamp brelse(bh); 3501ac27a0ecSDave Kleikamp if (err) 3502ac27a0ecSDave Kleikamp goto out; 3503ac27a0ecSDave Kleikamp offset = 0; 3504ac27a0ecSDave Kleikamp towrite -= tocopy; 3505ac27a0ecSDave Kleikamp data += tocopy; 3506ac27a0ecSDave Kleikamp blk++; 3507ac27a0ecSDave Kleikamp } 3508ac27a0ecSDave Kleikamp out: 35094d04e4fbSJan Kara if (len == towrite) { 35104d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3511ac27a0ecSDave Kleikamp return err; 35124d04e4fbSJan Kara } 3513ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3514ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3515617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3516ac27a0ecSDave Kleikamp } 3517ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3518617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3519ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3520ac27a0ecSDave Kleikamp return len - towrite; 3521ac27a0ecSDave Kleikamp } 3522ac27a0ecSDave Kleikamp 3523ac27a0ecSDave Kleikamp #endif 3524ac27a0ecSDave Kleikamp 3525617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 3526ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 3527ac27a0ecSDave Kleikamp { 3528617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3529ac27a0ecSDave Kleikamp } 3530ac27a0ecSDave Kleikamp 35315e8814f2STheodore Ts'o #ifdef CONFIG_PROC_FS 35325e8814f2STheodore Ts'o static int ext4_ui_proc_show(struct seq_file *m, void *v) 35335e8814f2STheodore Ts'o { 35345e8814f2STheodore Ts'o unsigned int *p = m->private; 35355e8814f2STheodore Ts'o 35365e8814f2STheodore Ts'o seq_printf(m, "%u\n", *p); 35375e8814f2STheodore Ts'o return 0; 35385e8814f2STheodore Ts'o } 35395e8814f2STheodore Ts'o 35405e8814f2STheodore Ts'o static int ext4_ui_proc_open(struct inode *inode, struct file *file) 35415e8814f2STheodore Ts'o { 35425e8814f2STheodore Ts'o return single_open(file, ext4_ui_proc_show, PDE(inode)->data); 35435e8814f2STheodore Ts'o } 35445e8814f2STheodore Ts'o 35455e8814f2STheodore Ts'o static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf, 35465e8814f2STheodore Ts'o size_t cnt, loff_t *ppos) 35475e8814f2STheodore Ts'o { 35485e8814f2STheodore Ts'o unsigned int *p = PDE(file->f_path.dentry->d_inode)->data; 35495e8814f2STheodore Ts'o char str[32]; 35505e8814f2STheodore Ts'o unsigned long value; 35515e8814f2STheodore Ts'o 35525e8814f2STheodore Ts'o if (cnt >= sizeof(str)) 35535e8814f2STheodore Ts'o return -EINVAL; 35545e8814f2STheodore Ts'o if (copy_from_user(str, buf, cnt)) 35555e8814f2STheodore Ts'o return -EFAULT; 35565e8814f2STheodore Ts'o value = simple_strtol(str, NULL, 0); 35575e8814f2STheodore Ts'o if (value < 0) 35585e8814f2STheodore Ts'o return -ERANGE; 35595e8814f2STheodore Ts'o *p = value; 35605e8814f2STheodore Ts'o return cnt; 35615e8814f2STheodore Ts'o } 35625e8814f2STheodore Ts'o 35635e8814f2STheodore Ts'o const struct file_operations ext4_ui_proc_fops = { 35645e8814f2STheodore Ts'o .owner = THIS_MODULE, 35655e8814f2STheodore Ts'o .open = ext4_ui_proc_open, 35665e8814f2STheodore Ts'o .read = seq_read, 35675e8814f2STheodore Ts'o .llseek = seq_lseek, 35685e8814f2STheodore Ts'o .release = single_release, 35695e8814f2STheodore Ts'o .write = ext4_ui_proc_write, 35705e8814f2STheodore Ts'o }; 35715e8814f2STheodore Ts'o #endif 35725e8814f2STheodore Ts'o 3573*03010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 3574ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 3575*03010a33STheodore Ts'o .name = "ext4", 3576617ba13bSMingming Cao .get_sb = ext4_get_sb, 3577ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3578ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3579ac27a0ecSDave Kleikamp }; 3580ac27a0ecSDave Kleikamp 3581*03010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 3582*03010a33STheodore Ts'o static int ext4dev_get_sb(struct file_system_type *fs_type, 3583*03010a33STheodore Ts'o int flags, const char *dev_name, void *data, struct vfsmount *mnt) 3584*03010a33STheodore Ts'o { 3585*03010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Update your userspace programs " 3586*03010a33STheodore Ts'o "to mount using ext4\n"); 3587*03010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " 3588*03010a33STheodore Ts'o "will go away by 2.6.31\n"); 3589*03010a33STheodore Ts'o return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3590*03010a33STheodore Ts'o } 3591*03010a33STheodore Ts'o 3592*03010a33STheodore Ts'o static struct file_system_type ext4dev_fs_type = { 3593*03010a33STheodore Ts'o .owner = THIS_MODULE, 3594*03010a33STheodore Ts'o .name = "ext4dev", 3595*03010a33STheodore Ts'o .get_sb = ext4dev_get_sb, 3596*03010a33STheodore Ts'o .kill_sb = kill_block_super, 3597*03010a33STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 3598*03010a33STheodore Ts'o }; 3599*03010a33STheodore Ts'o MODULE_ALIAS("ext4dev"); 3600*03010a33STheodore Ts'o #endif 3601*03010a33STheodore Ts'o 3602617ba13bSMingming Cao static int __init init_ext4_fs(void) 3603ac27a0ecSDave Kleikamp { 3604c9de560dSAlex Tomas int err; 3605c9de560dSAlex Tomas 36069f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 3607c9de560dSAlex Tomas err = init_ext4_mballoc(); 3608ac27a0ecSDave Kleikamp if (err) 3609ac27a0ecSDave Kleikamp return err; 3610c9de560dSAlex Tomas 3611c9de560dSAlex Tomas err = init_ext4_xattr(); 3612c9de560dSAlex Tomas if (err) 3613c9de560dSAlex Tomas goto out2; 3614ac27a0ecSDave Kleikamp err = init_inodecache(); 3615ac27a0ecSDave Kleikamp if (err) 3616ac27a0ecSDave Kleikamp goto out1; 3617*03010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 3618ac27a0ecSDave Kleikamp if (err) 3619ac27a0ecSDave Kleikamp goto out; 3620*03010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 3621*03010a33STheodore Ts'o err = register_filesystem(&ext4dev_fs_type); 3622*03010a33STheodore Ts'o if (err) { 3623*03010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 3624*03010a33STheodore Ts'o goto out; 3625*03010a33STheodore Ts'o } 3626*03010a33STheodore Ts'o #endif 3627ac27a0ecSDave Kleikamp return 0; 3628ac27a0ecSDave Kleikamp out: 3629ac27a0ecSDave Kleikamp destroy_inodecache(); 3630ac27a0ecSDave Kleikamp out1: 3631617ba13bSMingming Cao exit_ext4_xattr(); 3632c9de560dSAlex Tomas out2: 3633c9de560dSAlex Tomas exit_ext4_mballoc(); 3634ac27a0ecSDave Kleikamp return err; 3635ac27a0ecSDave Kleikamp } 3636ac27a0ecSDave Kleikamp 3637617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 3638ac27a0ecSDave Kleikamp { 3639*03010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 3640*03010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 3641617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 3642*03010a33STheodore Ts'o #endif 3643ac27a0ecSDave Kleikamp destroy_inodecache(); 3644617ba13bSMingming Cao exit_ext4_xattr(); 3645c9de560dSAlex Tomas exit_ext4_mballoc(); 36469f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 3647ac27a0ecSDave Kleikamp } 3648ac27a0ecSDave Kleikamp 3649ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 3650617ba13bSMingming Cao MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); 3651ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 3652617ba13bSMingming Cao module_init(init_ext4_fs) 3653617ba13bSMingming Cao module_exit(exit_ext4_fs) 3654