X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fext4%2Fsuper.c;h=f016707597a728c37e6ea0a5150f6b16ac2ae577;hb=c9059598ea8981d02356eead3188bf7fa4d717b8;hp=de9d3d0eb20381054acd67af1341fa66e5764fcd;hpb=64769240bd07f446f83660bb143bb609d8ab4910;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/ext4/super.c b/fs/ext4/super.c index de9d3d0..f016707 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -34,6 +35,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -42,28 +46,32 @@ #include "ext4_jbd2.h" #include "xattr.h" #include "acl.h" -#include "namei.h" -#include "group.h" + +static int default_mb_history_length = 1000; + +module_param_named(default_mb_history_length, default_mb_history_length, + int, 0644); +MODULE_PARM_DESC(default_mb_history_length, + "Default number of entries saved for mb_history"); + +struct proc_dir_entry *ext4_proc_root; +static struct kset *ext4_kset; static int ext4_load_journal(struct super_block *, struct ext4_super_block *, unsigned long journal_devnum); -static int ext4_create_journal(struct super_block *, struct ext4_super_block *, - unsigned int); -static void ext4_commit_super (struct super_block * sb, - struct ext4_super_block * es, - int sync); -static void ext4_mark_recovery_complete(struct super_block * sb, - struct ext4_super_block * es); -static void ext4_clear_journal_err(struct super_block * sb, - struct ext4_super_block * es); +static int ext4_commit_super(struct super_block *sb, int sync); +static void ext4_mark_recovery_complete(struct super_block *sb, + struct ext4_super_block *es); +static void ext4_clear_journal_err(struct super_block *sb, + struct ext4_super_block *es); static int ext4_sync_fs(struct super_block *sb, int wait); -static const char *ext4_decode_error(struct super_block * sb, int errno, +static const char *ext4_decode_error(struct super_block *sb, int errno, char nbuf[16]); -static int ext4_remount (struct super_block * sb, int * flags, char * data); -static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf); -static void ext4_unlockfs(struct super_block *sb); -static void ext4_write_super (struct super_block * sb); -static void ext4_write_super_lockfs(struct super_block *sb); +static int ext4_remount(struct super_block *sb, int *flags, char *data); +static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); +static int ext4_unfreeze(struct super_block *sb); +static void ext4_write_super(struct super_block *sb); +static int ext4_freeze(struct super_block *sb); ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, @@ -71,7 +79,7 @@ ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, { return le32_to_cpu(bg->bg_block_bitmap_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); + (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); } ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, @@ -79,7 +87,7 @@ ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, { return le32_to_cpu(bg->bg_inode_bitmap_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); + (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); } ext4_fsblk_t ext4_inode_table(struct super_block *sb, @@ -87,7 +95,39 @@ ext4_fsblk_t ext4_inode_table(struct super_block *sb, { return le32_to_cpu(bg->bg_inode_table_lo) | (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? - (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); + (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); +} + +__u32 ext4_free_blks_count(struct super_block *sb, + struct ext4_group_desc *bg) +{ + return le16_to_cpu(bg->bg_free_blocks_count_lo) | + (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? + (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); +} + +__u32 ext4_free_inodes_count(struct super_block *sb, + struct ext4_group_desc *bg) +{ + return le16_to_cpu(bg->bg_free_inodes_count_lo) | + (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? + (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); +} + +__u32 ext4_used_dirs_count(struct super_block *sb, + struct ext4_group_desc *bg) +{ + return le16_to_cpu(bg->bg_used_dirs_count_lo) | + (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? + (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); +} + +__u32 ext4_itable_unused_count(struct super_block *sb, + struct ext4_group_desc *bg) +{ + return le16_to_cpu(bg->bg_itable_unused_lo) | + (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? + (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); } void ext4_block_bitmap_set(struct super_block *sb, @@ -114,6 +154,38 @@ void ext4_inode_table_set(struct super_block *sb, bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); } +void ext4_free_blks_set(struct super_block *sb, + struct ext4_group_desc *bg, __u32 count) +{ + bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); + if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) + bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); +} + +void ext4_free_inodes_set(struct super_block *sb, + struct ext4_group_desc *bg, __u32 count) +{ + bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); + if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) + bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); +} + +void ext4_used_dirs_set(struct super_block *sb, + struct ext4_group_desc *bg, __u32 count) +{ + bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); + if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) + bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); +} + +void ext4_itable_unused_set(struct super_block *sb, + struct ext4_group_desc *bg, __u32 count) +{ + bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); + if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) + bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); +} + /* * Wrappers for jbd2_journal_start/end. * @@ -133,13 +205,18 @@ handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) * backs (eg. EIO in the commit thread), then we still need to * take the FS itself readonly cleanly. */ journal = EXT4_SB(sb)->s_journal; - if (is_journal_aborted(journal)) { - ext4_abort(sb, __func__, - "Detected aborted journal"); - return ERR_PTR(-EROFS); + if (journal) { + if (is_journal_aborted(journal)) { + ext4_abort(sb, __func__, "Detected aborted journal"); + return ERR_PTR(-EROFS); + } + return jbd2_journal_start(journal, nblocks); } - - return jbd2_journal_start(journal, nblocks); + /* + * We're not journaling, return the appropriate indication. + */ + current->journal_info = EXT4_NOJOURNAL_HANDLE; + return current->journal_info; } /* @@ -154,6 +231,14 @@ int __ext4_journal_stop(const char *where, handle_t *handle) int err; int rc; + if (!ext4_handle_valid(handle)) { + /* + * Do this here since we don't call jbd2_journal_stop() in + * no-journal mode. + */ + current->journal_info = NULL; + return 0; + } sb = handle->h_transaction->t_journal->j_private; err = handle->h_err; rc = jbd2_journal_stop(handle); @@ -171,6 +256,8 @@ void ext4_journal_abort_handle(const char *caller, const char *err_fn, char nbuf[16]; const char *errstr = ext4_decode_error(NULL, err, nbuf); + BUG_ON(!ext4_handle_valid(handle)); + if (bh) BUFFER_TRACE(bh, "abort"); @@ -211,30 +298,30 @@ static void ext4_handle_error(struct super_block *sb) if (sb->s_flags & MS_RDONLY) return; - if (!test_opt (sb, ERRORS_CONT)) { + if (!test_opt(sb, ERRORS_CONT)) { journal_t *journal = EXT4_SB(sb)->s_journal; EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; if (journal) jbd2_journal_abort(journal, -EIO); } - if (test_opt (sb, ERRORS_RO)) { - printk (KERN_CRIT "Remounting filesystem read-only\n"); + if (test_opt(sb, ERRORS_RO)) { + ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); sb->s_flags |= MS_RDONLY; } - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); if (test_opt(sb, ERRORS_PANIC)) panic("EXT4-fs (device %s): panic forced after error\n", sb->s_id); } -void ext4_error (struct super_block * sb, const char * function, - const char * fmt, ...) +void ext4_error(struct super_block *sb, const char *function, + const char *fmt, ...) { va_list args; va_start(args, fmt); - printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); + printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); vprintk(fmt, args); printk("\n"); va_end(args); @@ -242,7 +329,7 @@ void ext4_error (struct super_block * sb, const char * function, ext4_handle_error(sb); } -static const char *ext4_decode_error(struct super_block * sb, int errno, +static const char *ext4_decode_error(struct super_block *sb, int errno, char nbuf[16]) { char *errstr = NULL; @@ -278,8 +365,7 @@ static const char *ext4_decode_error(struct super_block * sb, int errno, /* __ext4_std_error decodes expected errors from journaling functions * automatically and invokes the appropriate error response. */ -void __ext4_std_error (struct super_block * sb, const char * function, - int errno) +void __ext4_std_error(struct super_block *sb, const char *function, int errno) { char nbuf[16]; const char *errstr; @@ -292,8 +378,8 @@ void __ext4_std_error (struct super_block * sb, const char * function, return; errstr = ext4_decode_error(sb, errno, nbuf); - printk (KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", - sb->s_id, function, errstr); + printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", + sb->s_id, function, errstr); ext4_handle_error(sb); } @@ -308,15 +394,13 @@ void __ext4_std_error (struct super_block * sb, const char * function, * case we take the easy way out and panic immediately. */ -void ext4_abort (struct super_block * sb, const char * function, - const char * fmt, ...) +void ext4_abort(struct super_block *sb, const char *function, + const char *fmt, ...) { va_list args; - printk (KERN_CRIT "ext4_abort called.\n"); - va_start(args, fmt); - printk(KERN_CRIT "EXT4-fs error (device %s): %s: ",sb->s_id, function); + printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); vprintk(fmt, args); printk("\n"); va_end(args); @@ -327,15 +411,28 @@ void ext4_abort (struct super_block * sb, const char * function, if (sb->s_flags & MS_RDONLY) return; - printk(KERN_CRIT "Remounting filesystem read-only\n"); + ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; sb->s_flags |= MS_RDONLY; EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; - jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); + if (EXT4_SB(sb)->s_journal) + jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); } -void ext4_warning (struct super_block * sb, const char * function, - const char * fmt, ...) +void ext4_msg (struct super_block * sb, const char *prefix, + const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + printk("%sEXT4-fs (%s): ", prefix, sb->s_id); + vprintk(fmt, args); + printk("\n"); + va_end(args); +} + +void ext4_warning(struct super_block *sb, const char *function, + const char *fmt, ...) { va_list args; @@ -347,6 +444,43 @@ void ext4_warning (struct super_block * sb, const char * function, va_end(args); } +void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, + const char *function, const char *fmt, ...) +__releases(bitlock) +__acquires(bitlock) +{ + va_list args; + struct ext4_super_block *es = EXT4_SB(sb)->s_es; + + va_start(args, fmt); + printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); + vprintk(fmt, args); + printk("\n"); + va_end(args); + + if (test_opt(sb, ERRORS_CONT)) { + EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; + es->s_state |= cpu_to_le16(EXT4_ERROR_FS); + ext4_commit_super(sb, 0); + return; + } + ext4_unlock_group(sb, grp); + ext4_handle_error(sb); + /* + * We only get here in the ERRORS_RO case; relocking the group + * may be dangerous, but nothing bad will happen since the + * filesystem will have already been marked read/only and the + * journal has been aborted. We return 1 as a hint to callers + * who might what to use the return value from + * ext4_grp_locked_error() to distinguish beween the + * ERRORS_CONT and ERRORS_RO case, and perhaps return more + * aggressively from the ext4 function in question, with a + * more appropriate error code. + */ + ext4_lock_group(sb, grp); + return; +} + void ext4_update_dynamic_rev(struct super_block *sb) { struct ext4_super_block *es = EXT4_SB(sb)->s_es; @@ -372,70 +506,10 @@ void ext4_update_dynamic_rev(struct super_block *sb) */ } -int ext4_update_compat_feature(handle_t *handle, - struct super_block *sb, __u32 compat) -{ - int err = 0; - if (!EXT4_HAS_COMPAT_FEATURE(sb, compat)) { - err = ext4_journal_get_write_access(handle, - EXT4_SB(sb)->s_sbh); - if (err) - return err; - EXT4_SET_COMPAT_FEATURE(sb, compat); - sb->s_dirt = 1; - handle->h_sync = 1; - BUFFER_TRACE(EXT4_SB(sb)->s_sbh, - "call ext4_journal_dirty_met adata"); - err = ext4_journal_dirty_metadata(handle, - EXT4_SB(sb)->s_sbh); - } - return err; -} - -int ext4_update_rocompat_feature(handle_t *handle, - struct super_block *sb, __u32 rocompat) -{ - int err = 0; - if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, rocompat)) { - err = ext4_journal_get_write_access(handle, - EXT4_SB(sb)->s_sbh); - if (err) - return err; - EXT4_SET_RO_COMPAT_FEATURE(sb, rocompat); - sb->s_dirt = 1; - handle->h_sync = 1; - BUFFER_TRACE(EXT4_SB(sb)->s_sbh, - "call ext4_journal_dirty_met adata"); - err = ext4_journal_dirty_metadata(handle, - EXT4_SB(sb)->s_sbh); - } - return err; -} - -int ext4_update_incompat_feature(handle_t *handle, - struct super_block *sb, __u32 incompat) -{ - int err = 0; - if (!EXT4_HAS_INCOMPAT_FEATURE(sb, incompat)) { - err = ext4_journal_get_write_access(handle, - EXT4_SB(sb)->s_sbh); - if (err) - return err; - EXT4_SET_INCOMPAT_FEATURE(sb, incompat); - sb->s_dirt = 1; - handle->h_sync = 1; - BUFFER_TRACE(EXT4_SB(sb)->s_sbh, - "call ext4_journal_dirty_met adata"); - err = ext4_journal_dirty_metadata(handle, - EXT4_SB(sb)->s_sbh); - } - return err; -} - /* * Open the external journal device */ -static struct block_device *ext4_blkdev_get(dev_t dev) +static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) { struct block_device *bdev; char b[BDEVNAME_SIZE]; @@ -446,7 +520,7 @@ static struct block_device *ext4_blkdev_get(dev_t dev) return bdev; fail: - printk(KERN_ERR "EXT4: failed to open journal device %s: %ld\n", + ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", __bdevname(dev, b), PTR_ERR(bdev)); return NULL; } @@ -457,7 +531,7 @@ fail: static int ext4_blkdev_put(struct block_device *bdev) { bd_release(bdev); - return blkdev_put(bdev); + return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); } static int ext4_blkdev_remove(struct ext4_sb_info *sbi) @@ -482,8 +556,8 @@ static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) { struct list_head *l; - printk(KERN_ERR "sb orphan head is %d\n", - le32_to_cpu(sbi->s_es->s_last_orphan)); + ext4_msg(sb, KERN_ERR, "sb orphan head is %d", + le32_to_cpu(sbi->s_es->s_last_orphan)); printk(KERN_ERR "sb_info orphan list:\n"); list_for_each(l, &sbi->s_orphan) { @@ -496,32 +570,44 @@ static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) } } -static void ext4_put_super (struct super_block * sb) +static void ext4_put_super(struct super_block *sb) { struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_super_block *es = sbi->s_es; - int i; + int i, err; + ext4_release_system_zone(sb); ext4_mb_release(sb); ext4_ext_release(sb); ext4_xattr_put_super(sb); - jbd2_journal_destroy(sbi->s_journal); - sbi->s_journal = NULL; + if (sbi->s_journal) { + err = jbd2_journal_destroy(sbi->s_journal); + sbi->s_journal = NULL; + if (err < 0) + ext4_abort(sb, __func__, + "Couldn't clean up the journal"); + } if (!(sb->s_flags & MS_RDONLY)) { EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); es->s_state = cpu_to_le16(sbi->s_mount_state); - BUFFER_TRACE(sbi->s_sbh, "marking dirty"); - mark_buffer_dirty(sbi->s_sbh); - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); + } + if (sbi->s_proc) { + remove_proc_entry(sb->s_id, ext4_proc_root); } + kobject_del(&sbi->s_kobj); for (i = 0; i < sbi->s_gdb_count; i++) brelse(sbi->s_group_desc[i]); kfree(sbi->s_group_desc); - kfree(sbi->s_flex_groups); + if (is_vmalloc_addr(sbi->s_flex_groups)) + vfree(sbi->s_flex_groups); + else + kfree(sbi->s_flex_groups); percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); + percpu_counter_destroy(&sbi->s_dirtyblocks_counter); brelse(sbi->s_sbh); #ifdef CONFIG_QUOTA for (i = 0; i < MAXQUOTAS; i++) @@ -548,8 +634,18 @@ static void ext4_put_super (struct super_block * sb) ext4_blkdev_remove(sbi); } sb->s_fs_info = NULL; + /* + * Now that we are completely done shutting down the + * superblock, we need to actually destroy the kobject. + */ + unlock_kernel(); + unlock_super(sb); + kobject_put(&sbi->s_kobj); + wait_for_completion(&sbi->s_kobj_unregister); + lock_super(sb); + lock_kernel(); + kfree(sbi->s_blockgroup_lock); kfree(sbi); - return; } static struct kmem_cache *ext4_inode_cachep; @@ -564,24 +660,37 @@ static struct inode *ext4_alloc_inode(struct super_block *sb) ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); if (!ei) return NULL; -#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL + +#ifdef CONFIG_EXT4_FS_POSIX_ACL ei->i_acl = EXT4_ACL_NOT_CACHED; ei->i_default_acl = EXT4_ACL_NOT_CACHED; #endif - ei->i_block_alloc_info = NULL; ei->vfs_inode.i_version = 1; + ei->vfs_inode.i_data.writeback_index = 0; memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); INIT_LIST_HEAD(&ei->i_prealloc_list); spin_lock_init(&ei->i_prealloc_lock); + /* + * Note: We can be called before EXT4_SB(sb)->s_journal is set, + * therefore it can be null here. Don't check it, just initialize + * jinode. + */ jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); + ei->i_reserved_data_blocks = 0; + ei->i_reserved_meta_blocks = 0; + ei->i_allocated_meta_blocks = 0; + ei->i_delalloc_reserved_flag = 0; + spin_lock_init(&(ei->i_block_reservation_lock)); + return &ei->vfs_inode; } static void ext4_destroy_inode(struct inode *inode) { if (!list_empty(&(EXT4_I(inode)->i_orphan))) { - printk("EXT4 Inode %p: orphan list check failed!\n", - EXT4_I(inode)); + ext4_msg(inode->i_sb, KERN_ERR, + "Inode %lu (%p): orphan list check failed!", + inode->i_ino, EXT4_I(inode)); print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, EXT4_I(inode), sizeof(struct ext4_inode_info), true); @@ -590,12 +699,12 @@ static void ext4_destroy_inode(struct inode *inode) kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); } -static void init_once(struct kmem_cache *cachep, void *foo) +static void init_once(void *foo) { struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; INIT_LIST_HEAD(&ei->i_orphan); -#ifdef CONFIG_EXT4DEV_FS_XATTR +#ifdef CONFIG_EXT4_FS_XATTR init_rwsem(&ei->xattr_sem); #endif init_rwsem(&ei->i_data_sem); @@ -621,8 +730,7 @@ static void destroy_inodecache(void) static void ext4_clear_inode(struct inode *inode) { - struct ext4_block_alloc_info *rsv = EXT4_I(inode)->i_block_alloc_info; -#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL +#ifdef CONFIG_EXT4_FS_POSIX_ACL if (EXT4_I(inode)->i_acl && EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { posix_acl_release(EXT4_I(inode)->i_acl); @@ -634,22 +742,21 @@ static void ext4_clear_inode(struct inode *inode) EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; } #endif - ext4_discard_reservation(inode); - EXT4_I(inode)->i_block_alloc_info = NULL; - if (unlikely(rsv)) - kfree(rsv); - jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, + ext4_discard_preallocations(inode); + if (EXT4_JOURNAL(inode)) + jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, &EXT4_I(inode)->jinode); } -static inline void ext4_show_quota_options(struct seq_file *seq, struct super_block *sb) +static inline void ext4_show_quota_options(struct seq_file *seq, + struct super_block *sb) { #if defined(CONFIG_QUOTA) struct ext4_sb_info *sbi = EXT4_SB(sb); if (sbi->s_jquota_fmt) seq_printf(seq, ",jqfmt=%s", - (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold": "vfsv0"); + (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); if (sbi->s_qf_names[USRQUOTA]) seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); @@ -713,7 +820,7 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) seq_puts(seq, ",debug"); if (test_opt(sb, OLDALLOC)) seq_puts(seq, ",oldalloc"); -#ifdef CONFIG_EXT4DEV_FS_XATTR +#ifdef CONFIG_EXT4_FS_XATTR if (test_opt(sb, XATTR_USER) && !(def_mount_opts & EXT4_DEFM_XATTR_USER)) seq_puts(seq, ",user_xattr"); @@ -722,18 +829,25 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) seq_puts(seq, ",nouser_xattr"); } #endif -#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL +#ifdef CONFIG_EXT4_FS_POSIX_ACL if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) seq_puts(seq, ",acl"); if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) seq_puts(seq, ",noacl"); #endif - if (!test_opt(sb, RESERVATION)) - seq_puts(seq, ",noreservation"); - if (sbi->s_commit_interval) { + if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { seq_printf(seq, ",commit=%u", (unsigned) (sbi->s_commit_interval / HZ)); } + if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { + seq_printf(seq, ",min_batch_time=%u", + (unsigned) sbi->s_min_batch_time); + } + if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { + seq_printf(seq, ",max_batch_time=%u", + (unsigned) sbi->s_min_batch_time); + } + /* * We're changing the default of barrier mount option, so * let's always display its mount state so it's clear what its @@ -745,12 +859,11 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) seq_puts(seq, ",journal_async_commit"); if (test_opt(sb, NOBH)) seq_puts(seq, ",nobh"); - if (!test_opt(sb, EXTENTS)) - seq_puts(seq, ",noextents"); - if (!test_opt(sb, MBALLOC)) - seq_puts(seq, ",nomballoc"); if (test_opt(sb, I_VERSION)) seq_puts(seq, ",i_version"); + if (!test_opt(sb, DELALLOC)) + seq_puts(seq, ",nodelalloc"); + if (sbi->s_stripe) seq_printf(seq, ",stripe=%lu", sbi->s_stripe); @@ -765,13 +878,23 @@ static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) seq_puts(seq, ",data=writeback"); + if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) + seq_printf(seq, ",inode_readahead_blks=%u", + sbi->s_inode_readahead_blks); + + if (test_opt(sb, DATA_ERR_ABORT)) + seq_puts(seq, ",data_err=abort"); + + if (test_opt(sb, NO_AUTO_DA_ALLOC)) + seq_puts(seq, ",noauto_da_alloc"); + ext4_show_quota_options(seq, sb); + return 0; } - static struct inode *ext4_nfs_get_inode(struct super_block *sb, - u64 ino, u32 generation) + u64 ino, u32 generation) { struct inode *inode; @@ -800,25 +923,43 @@ static struct inode *ext4_nfs_get_inode(struct super_block *sb, } static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type) + int fh_len, int fh_type) { return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ext4_nfs_get_inode); } static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, - int fh_len, int fh_type) + int fh_len, int fh_type) { return generic_fh_to_parent(sb, fid, fh_len, fh_type, ext4_nfs_get_inode); } +/* + * Try to release metadata pages (indirect blocks, directories) which are + * mapped via the block device. Since these pages could have journal heads + * which would prevent try_to_free_buffers() from freeing them, we must use + * jbd2 layer's try_to_free_buffers() function to release them. + */ +static int bdev_try_to_free_page(struct super_block *sb, struct page *page, + gfp_t wait) +{ + journal_t *journal = EXT4_SB(sb)->s_journal; + + WARN_ON(PageChecked(page)); + if (!page_has_buffers(page)) + return 0; + if (journal) + return jbd2_journal_try_to_free_buffers(journal, page, + wait & ~__GFP_WAIT); + return try_to_free_buffers(page); +} + #ifdef CONFIG_QUOTA -#define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group") -#define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) +#define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") +#define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) -static int ext4_dquot_initialize(struct inode *inode, int type); -static int ext4_dquot_drop(struct inode *inode); static int ext4_write_dquot(struct dquot *dquot); static int ext4_acquire_dquot(struct dquot *dquot); static int ext4_release_dquot(struct dquot *dquot); @@ -833,9 +974,13 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off); static struct dquot_operations ext4_quota_operations = { - .initialize = ext4_dquot_initialize, - .drop = ext4_dquot_drop, + .initialize = dquot_initialize, + .drop = dquot_drop, .alloc_space = dquot_alloc_space, + .reserve_space = dquot_reserve_space, + .claim_space = dquot_claim_space, + .release_rsv = dquot_release_reserved_space, + .get_reserved_space = ext4_get_reserved_space, .alloc_inode = dquot_alloc_inode, .free_space = dquot_free_space, .free_inode = dquot_free_inode, @@ -844,7 +989,9 @@ static struct dquot_operations ext4_quota_operations = { .acquire_dquot = ext4_acquire_dquot, .release_dquot = ext4_release_dquot, .mark_dirty = ext4_mark_dquot_dirty, - .write_info = ext4_write_info + .write_info = ext4_write_info, + .alloc_dquot = dquot_alloc, + .destroy_dquot = dquot_destroy, }; static struct quotactl_ops ext4_qctl_operations = { @@ -865,10 +1012,28 @@ static const struct super_operations ext4_sops = { .dirty_inode = ext4_dirty_inode, .delete_inode = ext4_delete_inode, .put_super = ext4_put_super, - .write_super = ext4_write_super, .sync_fs = ext4_sync_fs, - .write_super_lockfs = ext4_write_super_lockfs, - .unlockfs = ext4_unlockfs, + .freeze_fs = ext4_freeze, + .unfreeze_fs = ext4_unfreeze, + .statfs = ext4_statfs, + .remount_fs = ext4_remount, + .clear_inode = ext4_clear_inode, + .show_options = ext4_show_options, +#ifdef CONFIG_QUOTA + .quota_read = ext4_quota_read, + .quota_write = ext4_quota_write, +#endif + .bdev_try_to_free_page = bdev_try_to_free_page, +}; + +static const struct super_operations ext4_nojournal_sops = { + .alloc_inode = ext4_alloc_inode, + .destroy_inode = ext4_destroy_inode, + .write_inode = ext4_write_inode, + .dirty_inode = ext4_dirty_inode, + .delete_inode = ext4_delete_inode, + .write_super = ext4_write_super, + .put_super = ext4_put_super, .statfs = ext4_statfs, .remount_fs = ext4_remount, .clear_inode = ext4_clear_inode, @@ -877,6 +1042,7 @@ static const struct super_operations ext4_sops = { .quota_read = ext4_quota_read, .quota_write = ext4_quota_write, #endif + .bdev_try_to_free_page = bdev_try_to_free_page, }; static const struct export_operations ext4_export_ops = { @@ -888,20 +1054,24 @@ static const struct export_operations ext4_export_ops = { enum { Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, - Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, + Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, - Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, - Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev, + Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, Opt_nobh, Opt_bh, + Opt_commit, Opt_min_batch_time, Opt_max_batch_time, + Opt_journal_update, Opt_journal_dev, Opt_journal_checksum, Opt_journal_async_commit, Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, + Opt_data_err_abort, Opt_data_err_ignore, Opt_mb_history_length, Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, - Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, - Opt_grpquota, Opt_extents, Opt_noextents, Opt_i_version, - Opt_mballoc, Opt_nomballoc, Opt_stripe, Opt_delalloc, + Opt_ignore, Opt_barrier, Opt_nobarrier, Opt_err, Opt_resize, + Opt_usrquota, Opt_grpquota, Opt_i_version, + Opt_stripe, Opt_delalloc, Opt_nodelalloc, + Opt_block_validity, Opt_noblock_validity, + Opt_inode_readahead_blks, Opt_journal_ioprio }; -static match_table_t tokens = { +static const match_table_t tokens = { {Opt_bsd_df, "bsddf"}, {Opt_minix_df, "minixdf"}, {Opt_grpid, "grpid"}, @@ -915,8 +1085,6 @@ static match_table_t tokens = { {Opt_err_panic, "errors=panic"}, {Opt_err_ro, "errors=remount-ro"}, {Opt_nouid32, "nouid32"}, - {Opt_nocheck, "nocheck"}, - {Opt_nocheck, "check=none"}, {Opt_debug, "debug"}, {Opt_oldalloc, "oldalloc"}, {Opt_orlov, "orlov"}, @@ -924,14 +1092,13 @@ static match_table_t tokens = { {Opt_nouser_xattr, "nouser_xattr"}, {Opt_acl, "acl"}, {Opt_noacl, "noacl"}, - {Opt_reservation, "reservation"}, - {Opt_noreservation, "noreservation"}, {Opt_noload, "noload"}, {Opt_nobh, "nobh"}, {Opt_bh, "bh"}, {Opt_commit, "commit=%u"}, + {Opt_min_batch_time, "min_batch_time=%u"}, + {Opt_max_batch_time, "max_batch_time=%u"}, {Opt_journal_update, "journal=update"}, - {Opt_journal_inum, "journal=%u"}, {Opt_journal_dev, "journal_dev=%u"}, {Opt_journal_checksum, "journal_checksum"}, {Opt_journal_async_commit, "journal_async_commit"}, @@ -939,6 +1106,9 @@ static match_table_t tokens = { {Opt_data_journal, "data=journal"}, {Opt_data_ordered, "data=ordered"}, {Opt_data_writeback, "data=writeback"}, + {Opt_data_err_abort, "data_err=abort"}, + {Opt_data_err_ignore, "data_err=ignore"}, + {Opt_mb_history_length, "mb_history_length=%u"}, {Opt_offusrjquota, "usrjquota="}, {Opt_usrjquota, "usrjquota=%s"}, {Opt_offgrpjquota, "grpjquota="}, @@ -950,14 +1120,20 @@ static match_table_t tokens = { {Opt_quota, "quota"}, {Opt_usrquota, "usrquota"}, {Opt_barrier, "barrier=%u"}, - {Opt_extents, "extents"}, - {Opt_noextents, "noextents"}, + {Opt_barrier, "barrier"}, + {Opt_nobarrier, "nobarrier"}, {Opt_i_version, "i_version"}, - {Opt_mballoc, "mballoc"}, - {Opt_nomballoc, "nomballoc"}, {Opt_stripe, "stripe=%u"}, {Opt_resize, "resize"}, {Opt_delalloc, "delalloc"}, + {Opt_nodelalloc, "nodelalloc"}, + {Opt_block_validity, "block_validity"}, + {Opt_noblock_validity, "noblock_validity"}, + {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, + {Opt_journal_ioprio, "journal_ioprio=%u"}, + {Opt_auto_da_alloc, "auto_da_alloc=%u"}, + {Opt_auto_da_alloc, "auto_da_alloc"}, + {Opt_noauto_da_alloc, "noauto_da_alloc"}, {Opt_err, NULL}, }; @@ -968,26 +1144,31 @@ static ext4_fsblk_t get_sb_block(void **data) if (!options || strncmp(options, "sb=", 3) != 0) return 1; /* Default location */ + options += 3; - /*todo: use simple_strtoll with >32bit ext4 */ + /* TODO: use simple_strtoll with >32bit ext4 */ sb_block = simple_strtoul(options, &options, 0); if (*options && *options != ',') { - printk("EXT4-fs: Invalid sb specification: %s\n", + printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", (char *) *data); return 1; } if (*options == ',') options++; *data = (void *) options; + return sb_block; } -static int parse_options (char *options, struct super_block *sb, - unsigned int *inum, unsigned long *journal_devnum, - ext4_fsblk_t *n_blocks_count, int is_remount) +#define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) + +static int parse_options(char *options, struct super_block *sb, + unsigned long *journal_devnum, + unsigned int *journal_ioprio, + ext4_fsblk_t *n_blocks_count, int is_remount) { struct ext4_sb_info *sbi = EXT4_SB(sb); - char * p; + char *p; substring_t args[MAX_OPT_ARGS]; int data_opt = 0; int option; @@ -999,7 +1180,7 @@ static int parse_options (char *options, struct super_block *sb, if (!options) return 1; - while ((p = strsep (&options, ",")) != NULL) { + while ((p = strsep(&options, ",")) != NULL) { int token; if (!*p) continue; @@ -1007,16 +1188,16 @@ static int parse_options (char *options, struct super_block *sb, token = match_token(p, tokens, args); switch (token) { case Opt_bsd_df: - clear_opt (sbi->s_mount_opt, MINIX_DF); + clear_opt(sbi->s_mount_opt, MINIX_DF); break; case Opt_minix_df: - set_opt (sbi->s_mount_opt, MINIX_DF); + set_opt(sbi->s_mount_opt, MINIX_DF); break; case Opt_grpid: - set_opt (sbi->s_mount_opt, GRPID); + set_opt(sbi->s_mount_opt, GRPID); break; case Opt_nogrpid: - clear_opt (sbi->s_mount_opt, GRPID); + clear_opt(sbi->s_mount_opt, GRPID); break; case Opt_resuid: if (match_int(&args[0], &option)) @@ -1033,49 +1214,46 @@ static int parse_options (char *options, struct super_block *sb, /* *sb_block = match_int(&args[0]); */ break; case Opt_err_panic: - clear_opt (sbi->s_mount_opt, ERRORS_CONT); - clear_opt (sbi->s_mount_opt, ERRORS_RO); - set_opt (sbi->s_mount_opt, ERRORS_PANIC); + clear_opt(sbi->s_mount_opt, ERRORS_CONT); + clear_opt(sbi->s_mount_opt, ERRORS_RO); + set_opt(sbi->s_mount_opt, ERRORS_PANIC); break; case Opt_err_ro: - clear_opt (sbi->s_mount_opt, ERRORS_CONT); - clear_opt (sbi->s_mount_opt, ERRORS_PANIC); - set_opt (sbi->s_mount_opt, ERRORS_RO); + clear_opt(sbi->s_mount_opt, ERRORS_CONT); + clear_opt(sbi->s_mount_opt, ERRORS_PANIC); + set_opt(sbi->s_mount_opt, ERRORS_RO); break; case Opt_err_cont: - clear_opt (sbi->s_mount_opt, ERRORS_RO); - clear_opt (sbi->s_mount_opt, ERRORS_PANIC); - set_opt (sbi->s_mount_opt, ERRORS_CONT); + clear_opt(sbi->s_mount_opt, ERRORS_RO); + clear_opt(sbi->s_mount_opt, ERRORS_PANIC); + set_opt(sbi->s_mount_opt, ERRORS_CONT); break; case Opt_nouid32: - set_opt (sbi->s_mount_opt, NO_UID32); - break; - case Opt_nocheck: - clear_opt (sbi->s_mount_opt, CHECK); + set_opt(sbi->s_mount_opt, NO_UID32); break; case Opt_debug: - set_opt (sbi->s_mount_opt, DEBUG); + set_opt(sbi->s_mount_opt, DEBUG); break; case Opt_oldalloc: - set_opt (sbi->s_mount_opt, OLDALLOC); + set_opt(sbi->s_mount_opt, OLDALLOC); break; case Opt_orlov: - clear_opt (sbi->s_mount_opt, OLDALLOC); + clear_opt(sbi->s_mount_opt, OLDALLOC); break; -#ifdef CONFIG_EXT4DEV_FS_XATTR +#ifdef CONFIG_EXT4_FS_XATTR case Opt_user_xattr: - set_opt (sbi->s_mount_opt, XATTR_USER); + set_opt(sbi->s_mount_opt, XATTR_USER); break; case Opt_nouser_xattr: - clear_opt (sbi->s_mount_opt, XATTR_USER); + clear_opt(sbi->s_mount_opt, XATTR_USER); break; #else case Opt_user_xattr: case Opt_nouser_xattr: - printk("EXT4 (no)user_xattr options not supported\n"); + ext4_msg(sb, KERN_ERR, "(no)user_xattr options not supported"); break; #endif -#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL +#ifdef CONFIG_EXT4_FS_POSIX_ACL case Opt_acl: set_opt(sbi->s_mount_opt, POSIX_ACL); break; @@ -1085,15 +1263,9 @@ static int parse_options (char *options, struct super_block *sb, #else case Opt_acl: case Opt_noacl: - printk("EXT4 (no)acl options not supported\n"); + ext4_msg(sb, KERN_ERR, "(no)acl options not supported"); break; #endif - case Opt_reservation: - set_opt(sbi->s_mount_opt, RESERVATION); - break; - case Opt_noreservation: - clear_opt(sbi->s_mount_opt, RESERVATION); - break; case Opt_journal_update: /* @@@ FIXME */ /* Eventually we will want to be able to create @@ -1101,26 +1273,16 @@ static int parse_options (char *options, struct super_block *sb, user to specify an existing inode to be the journal file. */ if (is_remount) { - printk(KERN_ERR "EXT4-fs: cannot specify " - "journal on remount\n"); - return 0; - } - set_opt (sbi->s_mount_opt, UPDATE_JOURNAL); - break; - case Opt_journal_inum: - if (is_remount) { - printk(KERN_ERR "EXT4-fs: cannot specify " - "journal on remount\n"); + ext4_msg(sb, KERN_ERR, + "Cannot specify journal on remount"); return 0; } - if (match_int(&args[0], &option)) - return 0; - *inum = option; + set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); break; case Opt_journal_dev: if (is_remount) { - printk(KERN_ERR "EXT4-fs: cannot specify " - "journal on remount\n"); + ext4_msg(sb, KERN_ERR, + "Cannot specify journal on remount"); return 0; } if (match_int(&args[0], &option)) @@ -1135,7 +1297,7 @@ static int parse_options (char *options, struct super_block *sb, set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); break; case Opt_noload: - set_opt (sbi->s_mount_opt, NOLOAD); + set_opt(sbi->s_mount_opt, NOLOAD); break; case Opt_commit: if (match_int(&args[0], &option)) @@ -1146,6 +1308,22 @@ static int parse_options (char *options, struct super_block *sb, option = JBD2_DEFAULT_MAX_COMMIT_AGE; sbi->s_commit_interval = HZ * option; break; + case Opt_max_batch_time: + if (match_int(&args[0], &option)) + return 0; + if (option < 0) + return 0; + if (option == 0) + option = EXT4_DEF_MAX_BATCH_TIME; + sbi->s_max_batch_time = option; + break; + case Opt_min_batch_time: + if (match_int(&args[0], &option)) + return 0; + if (option < 0) + return 0; + sbi->s_min_batch_time = option; + break; case Opt_data_journal: data_opt = EXT4_MOUNT_JOURNAL_DATA; goto datacheck; @@ -1158,9 +1336,8 @@ static int parse_options (char *options, struct super_block *sb, if (is_remount) { if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) != data_opt) { - printk(KERN_ERR - "EXT4-fs: cannot change data " - "mode on remount\n"); + ext4_msg(sb, KERN_ERR, + "Cannot change data mode on remount"); return 0; } } else { @@ -1168,6 +1345,19 @@ static int parse_options (char *options, struct super_block *sb, sbi->s_mount_opt |= data_opt; } break; + case Opt_data_err_abort: + set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); + break; + case Opt_data_err_ignore: + clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); + break; + case Opt_mb_history_length: + if (match_int(&args[0], &option)) + return 0; + if (option < 0) + return 0; + sbi->s_mb_history_max = option; + break; #ifdef CONFIG_QUOTA case Opt_usrjquota: qtype = USRQUOTA; @@ -1175,34 +1365,33 @@ static int parse_options (char *options, struct super_block *sb, case Opt_grpjquota: qtype = GRPQUOTA; set_qf_name: - if ((sb_any_quota_enabled(sb) || - sb_any_quota_suspended(sb)) && + if (sb_any_quota_loaded(sb) && !sbi->s_qf_names[qtype]) { - printk(KERN_ERR - "EXT4-fs: Cannot change journaled " - "quota options when quota turned on.\n"); + ext4_msg(sb, KERN_ERR, + "Cannot change journaled " + "quota options when quota turned on"); return 0; } qname = match_strdup(&args[0]); if (!qname) { - printk(KERN_ERR - "EXT4-fs: not enough memory for " - "storing quotafile name.\n"); + ext4_msg(sb, KERN_ERR, + "Not enough memory for " + "storing quotafile name"); return 0; } if (sbi->s_qf_names[qtype] && strcmp(sbi->s_qf_names[qtype], qname)) { - printk(KERN_ERR - "EXT4-fs: %s quota file already " - "specified.\n", QTYPE2NAME(qtype)); + ext4_msg(sb, KERN_ERR, + "%s quota file already " + "specified", QTYPE2NAME(qtype)); kfree(qname); return 0; } sbi->s_qf_names[qtype] = qname; if (strchr(sbi->s_qf_names[qtype], '/')) { - printk(KERN_ERR - "EXT4-fs: quotafile must be on " - "filesystem root.\n"); + ext4_msg(sb, KERN_ERR, + "quotafile must be on " + "filesystem root"); kfree(sbi->s_qf_names[qtype]); sbi->s_qf_names[qtype] = NULL; return 0; @@ -1215,12 +1404,11 @@ set_qf_name: case Opt_offgrpjquota: qtype = GRPQUOTA; clear_qf_name: - if ((sb_any_quota_enabled(sb) || - sb_any_quota_suspended(sb)) && + if (sb_any_quota_loaded(sb) && sbi->s_qf_names[qtype]) { - printk(KERN_ERR "EXT4-fs: Cannot change " + ext4_msg(sb, KERN_ERR, "Cannot change " "journaled quota options when " - "quota turned on.\n"); + "quota turned on"); return 0; } /* @@ -1235,12 +1423,11 @@ clear_qf_name: case Opt_jqfmt_vfsv0: qfmt = QFMT_VFS_V0; set_qf_format: - if ((sb_any_quota_enabled(sb) || - sb_any_quota_suspended(sb)) && + if (sb_any_quota_loaded(sb) && sbi->s_jquota_fmt != qfmt) { - printk(KERN_ERR "EXT4-fs: Cannot change " + ext4_msg(sb, KERN_ERR, "Cannot change " "journaled quota options when " - "quota turned on.\n"); + "quota turned on"); return 0; } sbi->s_jquota_fmt = qfmt; @@ -1255,9 +1442,9 @@ set_qf_format: set_opt(sbi->s_mount_opt, GRPQUOTA); break; case Opt_noquota: - if (sb_any_quota_enabled(sb)) { - printk(KERN_ERR "EXT4-fs: Cannot change quota " - "options when quota turned on.\n"); + if (sb_any_quota_loaded(sb)) { + ext4_msg(sb, KERN_ERR, "Cannot change quota " + "options when quota turned on"); return 0; } clear_opt(sbi->s_mount_opt, QUOTA); @@ -1268,8 +1455,8 @@ set_qf_format: case Opt_quota: case Opt_usrquota: case Opt_grpquota: - printk(KERN_ERR - "EXT4-fs: quota options not supported.\n"); + ext4_msg(sb, KERN_ERR, + "quota options not supported"); break; case Opt_usrjquota: case Opt_grpjquota: @@ -1277,9 +1464,8 @@ set_qf_format: case Opt_offgrpjquota: case Opt_jqfmt_vfsold: case Opt_jqfmt_vfsv0: - printk(KERN_ERR - "EXT4-fs: journaled quota options not " - "supported.\n"); + ext4_msg(sb, KERN_ERR, + "journaled quota options not supported"); break; case Opt_noquota: break; @@ -1287,9 +1473,14 @@ set_qf_format: case Opt_abort: set_opt(sbi->s_mount_opt, ABORT); break; + case Opt_nobarrier: + clear_opt(sbi->s_mount_opt, BARRIER); + break; case Opt_barrier: - if (match_int(&args[0], &option)) - return 0; + if (match_int(&args[0], &option)) { + set_opt(sbi->s_mount_opt, BARRIER); + break; + } if (option) set_opt(sbi->s_mount_opt, BARRIER); else @@ -1299,8 +1490,9 @@ set_qf_format: break; case Opt_resize: if (!is_remount) { - printk("EXT4-fs: resize option only available " - "for remount\n"); + ext4_msg(sb, KERN_ERR, + "resize option only available " + "for remount"); return 0; } if (match_int(&args[0], &option) != 0) @@ -1313,21 +1505,12 @@ set_qf_format: case Opt_bh: clear_opt(sbi->s_mount_opt, NOBH); break; - case Opt_extents: - set_opt (sbi->s_mount_opt, EXTENTS); - break; - case Opt_noextents: - clear_opt (sbi->s_mount_opt, EXTENTS); - break; case Opt_i_version: set_opt(sbi->s_mount_opt, I_VERSION); sb->s_flags |= MS_I_VERSION; break; - case Opt_mballoc: - set_opt(sbi->s_mount_opt, MBALLOC); - break; - case Opt_nomballoc: - clear_opt(sbi->s_mount_opt, MBALLOC); + case Opt_nodelalloc: + clear_opt(sbi->s_mount_opt, DELALLOC); break; case Opt_stripe: if (match_int(&args[0], &option)) @@ -1339,10 +1522,50 @@ set_qf_format: case Opt_delalloc: set_opt(sbi->s_mount_opt, DELALLOC); break; + case Opt_block_validity: + set_opt(sbi->s_mount_opt, BLOCK_VALIDITY); + break; + case Opt_noblock_validity: + clear_opt(sbi->s_mount_opt, BLOCK_VALIDITY); + break; + case Opt_inode_readahead_blks: + if (match_int(&args[0], &option)) + return 0; + if (option < 0 || option > (1 << 30)) + return 0; + if (!is_power_of_2(option)) { + ext4_msg(sb, KERN_ERR, + "EXT4-fs: inode_readahead_blks" + " must be a power of 2"); + return 0; + } + sbi->s_inode_readahead_blks = option; + break; + case Opt_journal_ioprio: + if (match_int(&args[0], &option)) + return 0; + if (option < 0 || option > 7) + break; + *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, + option); + break; + case Opt_noauto_da_alloc: + set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); + break; + case Opt_auto_da_alloc: + if (match_int(&args[0], &option)) { + clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); + break; + } + if (option) + clear_opt(sbi->s_mount_opt, NO_AUTO_DA_ALLOC); + else + set_opt(sbi->s_mount_opt,NO_AUTO_DA_ALLOC); + break; default: - printk (KERN_ERR - "EXT4-fs: Unrecognized mount option \"%s\" " - "or missing value\n", p); + ext4_msg(sb, KERN_ERR, + "Unrecognized mount option \"%s\" " + "or missing value", p); return 0; } } @@ -1360,21 +1583,21 @@ set_qf_format: (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || (sbi->s_qf_names[GRPQUOTA] && (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { - printk(KERN_ERR "EXT4-fs: old and new quota " - "format mixing.\n"); + ext4_msg(sb, KERN_ERR, "old and new quota " + "format mixing"); return 0; } if (!sbi->s_jquota_fmt) { - printk(KERN_ERR "EXT4-fs: journaled quota format " - "not specified.\n"); + ext4_msg(sb, KERN_ERR, "journaled quota format " + "not specified"); return 0; } } else { if (sbi->s_jquota_fmt) { - printk(KERN_ERR "EXT4-fs: journaled quota format " + ext4_msg(sb, KERN_ERR, "journaled quota format " "specified with no journaling " - "enabled.\n"); + "enabled"); return 0; } } @@ -1389,49 +1612,44 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, int res = 0; if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { - printk (KERN_ERR "EXT4-fs warning: revision level too high, " - "forcing read-only mode\n"); + ext4_msg(sb, KERN_ERR, "revision level too high, " + "forcing read-only mode"); res = MS_RDONLY; } if (read_only) return res; if (!(sbi->s_mount_state & EXT4_VALID_FS)) - printk (KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " - "running e2fsck is recommended\n"); + ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " + "running e2fsck is recommended"); else if ((sbi->s_mount_state & EXT4_ERROR_FS)) - printk (KERN_WARNING - "EXT4-fs warning: mounting fs with errors, " - "running e2fsck is recommended\n"); + ext4_msg(sb, KERN_WARNING, + "warning: mounting fs with errors, " + "running e2fsck is recommended"); else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && le16_to_cpu(es->s_mnt_count) >= (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) - printk (KERN_WARNING - "EXT4-fs warning: maximal mount count reached, " - "running e2fsck is recommended\n"); + ext4_msg(sb, KERN_WARNING, + "warning: maximal mount count reached, " + "running e2fsck is recommended"); else if (le32_to_cpu(es->s_checkinterval) && (le32_to_cpu(es->s_lastcheck) + le32_to_cpu(es->s_checkinterval) <= get_seconds())) - printk (KERN_WARNING - "EXT4-fs warning: checktime reached, " - "running e2fsck is recommended\n"); -#if 0 - /* @@@ We _will_ want to clear the valid bit if we find - * inconsistencies, to force a fsck at reboot. But for - * a plain journaled filesystem we can keep it set as - * valid forever! :) - */ - es->s_state &= cpu_to_le16(~EXT4_VALID_FS); -#endif + ext4_msg(sb, KERN_WARNING, + "warning: checktime reached, " + "running e2fsck is recommended"); + if (!sbi->s_journal) + es->s_state &= cpu_to_le16(~EXT4_VALID_FS); if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); le16_add_cpu(&es->s_mnt_count, 1); es->s_mtime = cpu_to_le32(get_seconds()); ext4_update_dynamic_rev(sb); - EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); + if (sbi->s_journal) + EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); if (test_opt(sb, DEBUG)) - printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%lu, " + printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " "bpg=%lu, ipg=%lu, mo=%04lx]\n", sb->s_blocksize, sbi->s_groups_count, @@ -1439,14 +1657,12 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, EXT4_INODES_PER_GROUP(sb), sbi->s_mount_opt); - printk(KERN_INFO "EXT4 FS on %s, ", sb->s_id); - if (EXT4_SB(sb)->s_journal->j_inode == NULL) { - char b[BDEVNAME_SIZE]; - - printk("external journal on %s\n", - bdevname(EXT4_SB(sb)->s_journal->j_dev, b)); + if (EXT4_SB(sb)->s_journal) { + ext4_msg(sb, KERN_INFO, "%s journal on %s", + EXT4_SB(sb)->s_journal->j_inode ? "internal" : + "external", EXT4_SB(sb)->s_journal->j_devname); } else { - printk("internal journal\n"); + ext4_msg(sb, KERN_INFO, "no journal"); } return res; } @@ -1455,11 +1671,10 @@ static int ext4_fill_flex_info(struct super_block *sb) { struct ext4_sb_info *sbi = EXT4_SB(sb); struct ext4_group_desc *gdp = NULL; - struct buffer_head *bh; ext4_group_t flex_group_count; ext4_group_t flex_group; int groups_per_flex = 0; - __u64 block_bitmap = 0; + size_t size; int i; if (!sbi->s_es->s_log_groups_per_flex) { @@ -1470,28 +1685,33 @@ static int ext4_fill_flex_info(struct super_block *sb) sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; groups_per_flex = 1 << sbi->s_log_groups_per_flex; - flex_group_count = (sbi->s_groups_count + groups_per_flex - 1) / - groups_per_flex; - sbi->s_flex_groups = kmalloc(flex_group_count * - sizeof(struct flex_groups), GFP_KERNEL); + /* We allocate both existing and potentially added groups */ + flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + + ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << + EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; + size = flex_group_count * sizeof(struct flex_groups); + sbi->s_flex_groups = kzalloc(size, GFP_KERNEL); + if (sbi->s_flex_groups == NULL) { + sbi->s_flex_groups = vmalloc(size); + if (sbi->s_flex_groups) + memset(sbi->s_flex_groups, 0, size); + } if (sbi->s_flex_groups == NULL) { - printk(KERN_ERR "EXT4-fs: not enough memory\n"); + ext4_msg(sb, KERN_ERR, "not enough memory for " + "%u flex groups", flex_group_count); goto failed; } - memset(sbi->s_flex_groups, 0, flex_group_count * - sizeof(struct flex_groups)); - - gdp = ext4_get_group_desc(sb, 1, &bh); - block_bitmap = ext4_block_bitmap(sb, gdp) - 1; for (i = 0; i < sbi->s_groups_count; i++) { - gdp = ext4_get_group_desc(sb, i, &bh); + gdp = ext4_get_group_desc(sb, i, NULL); flex_group = ext4_flex_group(sbi, i); - sbi->s_flex_groups[flex_group].free_inodes += - le16_to_cpu(gdp->bg_free_inodes_count); - sbi->s_flex_groups[flex_group].free_blocks += - le16_to_cpu(gdp->bg_free_blocks_count); + atomic_set(&sbi->s_flex_groups[flex_group].free_inodes, + ext4_free_inodes_count(sb, gdp)); + atomic_set(&sbi->s_flex_groups[flex_group].free_blocks, + ext4_free_blks_count(sb, gdp)); + atomic_set(&sbi->s_flex_groups[flex_group].used_dirs, + ext4_used_dirs_count(sb, gdp)); } return 1; @@ -1551,7 +1771,7 @@ static int ext4_check_descriptors(struct super_block *sb) if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) flexbg_flag = 1; - ext4_debug ("Checking group descriptors"); + ext4_debug("Checking group descriptors"); for (i = 0; i < sbi->s_groups_count; i++) { struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); @@ -1563,43 +1783,45 @@ static int ext4_check_descriptors(struct super_block *sb) (EXT4_BLOCKS_PER_GROUP(sb) - 1); block_bitmap = ext4_block_bitmap(sb, gdp); - if (block_bitmap < first_block || block_bitmap > last_block) - { - printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " - "Block bitmap for group %lu not in group " + if (block_bitmap < first_block || block_bitmap > last_block) { + ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " + "Block bitmap for group %u not in group " "(block %llu)!", i, block_bitmap); return 0; } inode_bitmap = ext4_inode_bitmap(sb, gdp); - if (inode_bitmap < first_block || inode_bitmap > last_block) - { - printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " - "Inode bitmap for group %lu not in group " + if (inode_bitmap < first_block || inode_bitmap > last_block) { + ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " + "Inode bitmap for group %u not in group " "(block %llu)!", i, inode_bitmap); return 0; } inode_table = ext4_inode_table(sb, gdp); if (inode_table < first_block || - inode_table + sbi->s_itb_per_group - 1 > last_block) - { - printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " - "Inode table for group %lu not in group " + inode_table + sbi->s_itb_per_group - 1 > last_block) { + ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " + "Inode table for group %u not in group " "(block %llu)!", i, inode_table); return 0; } + ext4_lock_group(sb, i); if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { - printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " - "Checksum for group %lu failed (%u!=%u)\n", - i, le16_to_cpu(ext4_group_desc_csum(sbi, i, - gdp)), le16_to_cpu(gdp->bg_checksum)); - return 0; + ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " + "Checksum for group %u failed (%u!=%u)", + i, le16_to_cpu(ext4_group_desc_csum(sbi, i, + gdp)), le16_to_cpu(gdp->bg_checksum)); + if (!(sb->s_flags & MS_RDONLY)) { + ext4_unlock_group(sb, i); + return 0; + } } + ext4_unlock_group(sb, i); if (!flexbg_flag) first_block += EXT4_BLOCKS_PER_GROUP(sb); } ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); - sbi->s_es->s_free_inodes_count=cpu_to_le32(ext4_count_free_inodes(sb)); + sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); return 1; } @@ -1620,8 +1842,8 @@ static int ext4_check_descriptors(struct super_block *sb) * e2fsck was run on this filesystem, and it must have already done the orphan * inode cleanup for us, so we can safely abort without any further action. */ -static void ext4_orphan_cleanup (struct super_block * sb, - struct ext4_super_block * es) +static void ext4_orphan_cleanup(struct super_block *sb, + struct ext4_super_block *es) { unsigned int s_flags = sb->s_flags; int nr_orphans = 0, nr_truncates = 0; @@ -1634,8 +1856,8 @@ static void ext4_orphan_cleanup (struct super_block * sb, } if (bdev_read_only(sb->s_bdev)) { - printk(KERN_ERR "EXT4-fs: write access " - "unavailable, skipping orphan cleanup.\n"); + ext4_msg(sb, KERN_ERR, "write access " + "unavailable, skipping orphan cleanup"); return; } @@ -1649,8 +1871,7 @@ static void ext4_orphan_cleanup (struct super_block * sb, } if (s_flags & MS_RDONLY) { - printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", - sb->s_id); + ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); sb->s_flags &= ~MS_RDONLY; } #ifdef CONFIG_QUOTA @@ -1661,9 +1882,9 @@ static void ext4_orphan_cleanup (struct super_block * sb, if (EXT4_SB(sb)->s_qf_names[i]) { int ret = ext4_quota_on_mount(sb, i); if (ret < 0) - printk(KERN_ERR - "EXT4-fs: Cannot turn on journaled " - "quota: error %d\n", ret); + ext4_msg(sb, KERN_ERR, + "Cannot turn on journaled " + "quota: error %d", ret); } } #endif @@ -1678,18 +1899,18 @@ static void ext4_orphan_cleanup (struct super_block * sb, } list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); - DQUOT_INIT(inode); + vfs_dq_init(inode); if (inode->i_nlink) { - printk(KERN_DEBUG - "%s: truncating inode %lu to %Ld bytes\n", + ext4_msg(sb, KERN_DEBUG, + "%s: truncating inode %lu to %lld bytes", __func__, inode->i_ino, inode->i_size); - jbd_debug(2, "truncating inode %lu to %Ld bytes\n", + jbd_debug(2, "truncating inode %lu to %lld bytes\n", inode->i_ino, inode->i_size); ext4_truncate(inode); nr_truncates++; } else { - printk(KERN_DEBUG - "%s: deleting unreferenced inode %lu\n", + ext4_msg(sb, KERN_DEBUG, + "%s: deleting unreferenced inode %lu", __func__, inode->i_ino); jbd_debug(2, "deleting unreferenced inode %lu\n", inode->i_ino); @@ -1698,14 +1919,14 @@ static void ext4_orphan_cleanup (struct super_block * sb, iput(inode); /* The delete magic happens here! */ } -#define PLURAL(x) (x), ((x)==1) ? "" : "s" +#define PLURAL(x) (x), ((x) == 1) ? "" : "s" if (nr_orphans) - printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", - sb->s_id, PLURAL(nr_orphans)); + ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", + PLURAL(nr_orphans)); if (nr_truncates) - printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", - sb->s_id, PLURAL(nr_truncates)); + ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", + PLURAL(nr_truncates)); #ifdef CONFIG_QUOTA /* Turn quotas off */ for (i = 0; i < MAXQUOTAS; i++) { @@ -1715,6 +1936,7 @@ static void ext4_orphan_cleanup (struct super_block * sb, #endif sb->s_flags = s_flags; /* Restore MS_RDONLY status */ } + /* * Maximal extent format file size. * Resulting logical blkno at s_maxbytes must fit in our on-disk @@ -1724,15 +1946,15 @@ static void ext4_orphan_cleanup (struct super_block * sb, * * Note, this does *not* consider any metadata overhead for vfs i_blocks. */ -static loff_t ext4_max_size(int blkbits) +static loff_t ext4_max_size(int blkbits, int has_huge_files) { loff_t res; loff_t upper_limit = MAX_LFS_FILESIZE; /* small i_blocks in vfs inode? */ - if (sizeof(blkcnt_t) < sizeof(u64)) { + if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { /* - * CONFIG_LSF is not enabled implies the inode + * CONFIG_LBD is not enabled implies the inode * i_block represent total blocks in 512 bytes * 32 == size of vfs inode i_blocks * 8 */ @@ -1760,24 +1982,24 @@ static loff_t ext4_max_size(int blkbits) * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. * We need to be 1 filesystem block less than the 2^48 sector limit. */ -static loff_t ext4_max_bitmap_size(int bits) +static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) { loff_t res = EXT4_NDIR_BLOCKS; int meta_blocks; loff_t upper_limit; - /* This is calculated to be the largest file size for a - * dense, bitmapped file such that the total number of - * sectors in the file, including data and all indirect blocks, - * does not exceed 2^48 -1 - * __u32 i_blocks_lo and _u16 i_blocks_high representing the - * total number of 512 bytes blocks of the file + /* This is calculated to be the largest file size for a dense, block + * mapped file such that the file's total number of 512-byte sectors, + * including data and all indirect blocks, does not exceed (2^48 - 1). + * + * __u32 i_blocks_lo and _u16 i_blocks_high represent the total + * number of 512-byte sectors of the file. */ - if (sizeof(blkcnt_t) < sizeof(u64)) { + if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { /* - * CONFIG_LSF is not enabled implies the inode - * i_block represent total blocks in 512 bytes - * 32 == size of vfs inode i_blocks * 8 + * !has_huge_files or CONFIG_LBD not enabled implies that + * the inode i_block field represents total file blocks in + * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 */ upper_limit = (1LL << 32) - 1; @@ -1819,7 +2041,7 @@ static loff_t ext4_max_bitmap_size(int bits) } static ext4_fsblk_t descriptor_loc(struct super_block *sb, - ext4_fsblk_t logical_sb_block, int nr) + ext4_fsblk_t logical_sb_block, int nr) { struct ext4_sb_info *sbi = EXT4_SB(sb); ext4_group_t bg, first_meta_bg; @@ -1833,6 +2055,7 @@ static ext4_fsblk_t descriptor_loc(struct super_block *sb, bg = sbi->s_desc_per_block * nr; if (ext4_bg_has_super(sb, bg)) has_super = 1; + return (has_super + ext4_group_first_block_no(sb, bg)); } @@ -1865,45 +2088,234 @@ static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) return 0; } -static int ext4_fill_super (struct super_block *sb, void *data, int silent) +/* sysfs supprt */ + +struct ext4_attr { + struct attribute attr; + ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); + ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, + const char *, size_t); + int offset; +}; + +static int parse_strtoul(const char *buf, + unsigned long max, unsigned long *value) +{ + char *endp; + + while (*buf && isspace(*buf)) + buf++; + *value = simple_strtoul(buf, &endp, 0); + while (*endp && isspace(*endp)) + endp++; + if (*endp || *value > max) + return -EINVAL; + + return 0; +} + +static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, + struct ext4_sb_info *sbi, + char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%llu\n", + (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter)); +} + +static ssize_t session_write_kbytes_show(struct ext4_attr *a, + struct ext4_sb_info *sbi, char *buf) +{ + struct super_block *sb = sbi->s_buddy_cache->i_sb; + + return snprintf(buf, PAGE_SIZE, "%lu\n", + (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - + sbi->s_sectors_written_start) >> 1); +} + +static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, + struct ext4_sb_info *sbi, char *buf) +{ + struct super_block *sb = sbi->s_buddy_cache->i_sb; + + return snprintf(buf, PAGE_SIZE, "%llu\n", + sbi->s_kbytes_written + + ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - + EXT4_SB(sb)->s_sectors_written_start) >> 1)); +} + +static ssize_t inode_readahead_blks_store(struct ext4_attr *a, + struct ext4_sb_info *sbi, + const char *buf, size_t count) +{ + unsigned long t; + + if (parse_strtoul(buf, 0x40000000, &t)) + return -EINVAL; + + if (!is_power_of_2(t)) + return -EINVAL; + + sbi->s_inode_readahead_blks = t; + return count; +} + +static ssize_t sbi_ui_show(struct ext4_attr *a, + struct ext4_sb_info *sbi, char *buf) +{ + unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); + + return snprintf(buf, PAGE_SIZE, "%u\n", *ui); +} + +static ssize_t sbi_ui_store(struct ext4_attr *a, + struct ext4_sb_info *sbi, + const char *buf, size_t count) +{ + unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset); + unsigned long t; + + if (parse_strtoul(buf, 0xffffffff, &t)) + return -EINVAL; + *ui = t; + return count; +} + +#define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ +static struct ext4_attr ext4_attr_##_name = { \ + .attr = {.name = __stringify(_name), .mode = _mode }, \ + .show = _show, \ + .store = _store, \ + .offset = offsetof(struct ext4_sb_info, _elname), \ +} +#define EXT4_ATTR(name, mode, show, store) \ +static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) + +#define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) +#define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) +#define EXT4_RW_ATTR_SBI_UI(name, elname) \ + EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) +#define ATTR_LIST(name) &ext4_attr_##name.attr + +EXT4_RO_ATTR(delayed_allocation_blocks); +EXT4_RO_ATTR(session_write_kbytes); +EXT4_RO_ATTR(lifetime_write_kbytes); +EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, + inode_readahead_blks_store, s_inode_readahead_blks); +EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); +EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); +EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); +EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); +EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); +EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); + +static struct attribute *ext4_attrs[] = { + ATTR_LIST(delayed_allocation_blocks), + ATTR_LIST(session_write_kbytes), + ATTR_LIST(lifetime_write_kbytes), + ATTR_LIST(inode_readahead_blks), + ATTR_LIST(mb_stats), + ATTR_LIST(mb_max_to_scan), + ATTR_LIST(mb_min_to_scan), + ATTR_LIST(mb_order2_req), + ATTR_LIST(mb_stream_req), + ATTR_LIST(mb_group_prealloc), + NULL, +}; + +static ssize_t ext4_attr_show(struct kobject *kobj, + struct attribute *attr, char *buf) +{ + struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, + s_kobj); + struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); + + return a->show ? a->show(a, sbi, buf) : 0; +} + +static ssize_t ext4_attr_store(struct kobject *kobj, + struct attribute *attr, + const char *buf, size_t len) +{ + struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, + s_kobj); + struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); + + return a->store ? a->store(a, sbi, buf, len) : 0; +} + +static void ext4_sb_release(struct kobject *kobj) +{ + struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, + s_kobj); + complete(&sbi->s_kobj_unregister); +} + + +static struct sysfs_ops ext4_attr_ops = { + .show = ext4_attr_show, + .store = ext4_attr_store, +}; + +static struct kobj_type ext4_ktype = { + .default_attrs = ext4_attrs, + .sysfs_ops = &ext4_attr_ops, + .release = ext4_sb_release, +}; + +static int ext4_fill_super(struct super_block *sb, void *data, int silent) __releases(kernel_lock) __acquires(kernel_lock) - { - struct buffer_head * bh; + struct buffer_head *bh; struct ext4_super_block *es = NULL; struct ext4_sb_info *sbi; ext4_fsblk_t block; ext4_fsblk_t sb_block = get_sb_block(&data); ext4_fsblk_t logical_sb_block; unsigned long offset = 0; - unsigned int journal_inum = 0; unsigned long journal_devnum = 0; unsigned long def_mount_opts; struct inode *root; + char *cp; + const char *descr; int ret = -EINVAL; int blocksize; - int db_count; - int i; - int needs_recovery; - __le32 features; + unsigned int db_count; + unsigned int i; + int needs_recovery, has_huge_files; + int features; __u64 blocks_count; int err; + unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) return -ENOMEM; + + sbi->s_blockgroup_lock = + kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); + if (!sbi->s_blockgroup_lock) { + kfree(sbi); + return -ENOMEM; + } sb->s_fs_info = sbi; sbi->s_mount_opt = 0; sbi->s_resuid = EXT4_DEF_RESUID; sbi->s_resgid = EXT4_DEF_RESGID; + sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; sbi->s_sb_block = sb_block; + sbi->s_sectors_written_start = part_stat_read(sb->s_bdev->bd_part, + sectors[1]); unlock_kernel(); + /* Cleanup superblock name */ + for (cp = sb->s_id; (cp = strchr(cp, '/'));) + *cp = '!'; + blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); if (!blocksize) { - printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); + ext4_msg(sb, KERN_ERR, "unable to set blocksize"); goto out_fail; } @@ -1919,7 +2331,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) } if (!(bh = sb_bread(sb, logical_sb_block))) { - printk (KERN_ERR "EXT4-fs: unable to read superblock\n"); + ext4_msg(sb, KERN_ERR, "unable to read superblock"); goto out_fail; } /* @@ -1931,6 +2343,7 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) sb->s_magic = le16_to_cpu(es->s_magic); if (sb->s_magic != EXT4_SUPER_MAGIC) goto cantfind_ext4; + sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); /* Set defaults before we parse the mount options */ def_mount_opts = le32_to_cpu(es->s_default_mount_opts); @@ -1940,11 +2353,11 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) set_opt(sbi->s_mount_opt, GRPID); if (def_mount_opts & EXT4_DEFM_UID16) set_opt(sbi->s_mount_opt, NO_UID32); -#ifdef CONFIG_EXT4DEV_FS_XATTR +#ifdef CONFIG_EXT4_FS_XATTR if (def_mount_opts & EXT4_DEFM_XATTR_USER) set_opt(sbi->s_mount_opt, XATTR_USER); #endif -#ifdef CONFIG_EXT4DEV_FS_POSIX_ACL +#ifdef CONFIG_EXT4_FS_POSIX_ACL if (def_mount_opts & EXT4_DEFM_ACL) set_opt(sbi->s_mount_opt, POSIX_ACL); #endif @@ -1964,23 +2377,21 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) sbi->s_resuid = le16_to_cpu(es->s_def_resuid); sbi->s_resgid = le16_to_cpu(es->s_def_resgid); + sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; + sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; + sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; + sbi->s_mb_history_max = default_mb_history_length; - set_opt(sbi->s_mount_opt, RESERVATION); set_opt(sbi->s_mount_opt, BARRIER); /* - * turn on extents feature by default in ext4 filesystem - * User -o noextents to turn it off - */ - set_opt(sbi->s_mount_opt, EXTENTS); - /* - * turn on mballoc feature by default in ext4 filesystem - * User -o nomballoc to turn it off + * enable delayed allocation by default + * Use -o nodelalloc to turn it off */ - set_opt(sbi->s_mount_opt, MBALLOC); + set_opt(sbi->s_mount_opt, DELALLOC); - if (!parse_options ((char *) data, sb, &journal_inum, &journal_devnum, - NULL, 0)) + if (!parse_options((char *) data, sb, &journal_devnum, + &journal_ioprio, NULL, 0)) goto failed_mount; sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | @@ -1990,19 +2401,9 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) - printk(KERN_WARNING - "EXT4-fs warning: feature flags set on rev 0 fs, " - "running e2fsck is recommended\n"); - - /* - * Since ext4 is still considered development code, we require - * that the TEST_FILESYS flag in s->flags be set. - */ - if (!(le32_to_cpu(es->s_flags) & EXT2_FLAGS_TEST_FILESYS)) { - printk(KERN_WARNING "EXT4-fs: %s: not marked " - "OK to use with test code.\n", sb->s_id); - goto failed_mount; - } + ext4_msg(sb, KERN_WARNING, + "feature flags set on rev 0 fs, " + "running e2fsck is recommended"); /* * Check feature flags regardless of the revision level, since we @@ -2011,28 +2412,34 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) */ features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); if (features) { - printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " - "unsupported optional features (%x).\n", - sb->s_id, le32_to_cpu(features)); + ext4_msg(sb, KERN_ERR, + "Couldn't mount because of " + "unsupported optional features (%x)", + (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & + ~EXT4_FEATURE_INCOMPAT_SUPP)); goto failed_mount; } features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); if (!(sb->s_flags & MS_RDONLY) && features) { - printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " - "unsupported optional features (%x).\n", - sb->s_id, le32_to_cpu(features)); + ext4_msg(sb, KERN_ERR, + "Couldn't mount RDWR because of " + "unsupported optional features (%x)", + (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & + ~EXT4_FEATURE_RO_COMPAT_SUPP)); goto failed_mount; } - if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { + has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, + EXT4_FEATURE_RO_COMPAT_HUGE_FILE); + if (has_huge_files) { /* * Large file size enabled file system can only be - * mount if kernel is build with CONFIG_LSF + * mount if kernel is build with CONFIG_LBD */ if (sizeof(root->i_blocks) < sizeof(u64) && !(sb->s_flags & MS_RDONLY)) { - printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " + ext4_msg(sb, KERN_ERR, "Filesystem with huge " "files cannot be mounted read-write " - "without CONFIG_LSF.\n", sb->s_id); + "without CONFIG_LBD"); goto failed_mount; } } @@ -2040,41 +2447,40 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) if (blocksize < EXT4_MIN_BLOCK_SIZE || blocksize > EXT4_MAX_BLOCK_SIZE) { - printk(KERN_ERR - "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", - blocksize, sb->s_id); + ext4_msg(sb, KERN_ERR, + "Unsupported filesystem blocksize %d", blocksize); goto failed_mount; } if (sb->s_blocksize != blocksize) { - /* Validate the filesystem blocksize */ if (!sb_set_blocksize(sb, blocksize)) { - printk(KERN_ERR "EXT4-fs: bad block size %d.\n", + ext4_msg(sb, KERN_ERR, "bad block size %d", blocksize); goto failed_mount; } - brelse (bh); + brelse(bh); logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; offset = do_div(logical_sb_block, blocksize); bh = sb_bread(sb, logical_sb_block); if (!bh) { - printk(KERN_ERR - "EXT4-fs: Can't read superblock on 2nd try.\n"); + ext4_msg(sb, KERN_ERR, + "Can't read superblock on 2nd try"); goto failed_mount; } es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); sbi->s_es = es; if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { - printk (KERN_ERR - "EXT4-fs: Magic mismatch, very weird !\n"); + ext4_msg(sb, KERN_ERR, + "Magic mismatch, very weird!"); goto failed_mount; } } - sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits); - sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits); + sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, + has_huge_files); + sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; @@ -2085,30 +2491,33 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || (!is_power_of_2(sbi->s_inode_size)) || (sbi->s_inode_size > blocksize)) { - printk (KERN_ERR - "EXT4-fs: unsupported inode size: %d\n", - sbi->s_inode_size); + ext4_msg(sb, KERN_ERR, + "unsupported inode size: %d", + sbi->s_inode_size); goto failed_mount; } if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); } + sbi->s_desc_size = le16_to_cpu(es->s_desc_size); if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || sbi->s_desc_size > EXT4_MAX_DESC_SIZE || !is_power_of_2(sbi->s_desc_size)) { - printk(KERN_ERR - "EXT4-fs: unsupported descriptor size %lu\n", + ext4_msg(sb, KERN_ERR, + "unsupported descriptor size %lu", sbi->s_desc_size); goto failed_mount; } } else sbi->s_desc_size = EXT4_MIN_DESC_SIZE; + sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) goto cantfind_ext4; + sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); if (sbi->s_inodes_per_block == 0) goto cantfind_ext4; @@ -2119,81 +2528,117 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) sbi->s_mount_state = le16_to_cpu(es->s_state); sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); - for (i=0; i < 4; i++) + + for (i = 0; i < 4; i++) sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); sbi->s_def_hash_version = es->s_def_hash_version; + i = le32_to_cpu(es->s_flags); + if (i & EXT2_FLAGS_UNSIGNED_HASH) + sbi->s_hash_unsigned = 3; + else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { +#ifdef __CHAR_UNSIGNED__ + es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); + sbi->s_hash_unsigned = 3; +#else + es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); +#endif + sb->s_dirt = 1; + } if (sbi->s_blocks_per_group > blocksize * 8) { - printk (KERN_ERR - "EXT4-fs: #blocks per group too big: %lu\n", - sbi->s_blocks_per_group); + ext4_msg(sb, KERN_ERR, + "#blocks per group too big: %lu", + sbi->s_blocks_per_group); goto failed_mount; } if (sbi->s_inodes_per_group > blocksize * 8) { - printk (KERN_ERR - "EXT4-fs: #inodes per group too big: %lu\n", - sbi->s_inodes_per_group); + ext4_msg(sb, KERN_ERR, + "#inodes per group too big: %lu", + sbi->s_inodes_per_group); goto failed_mount; } if (ext4_blocks_count(es) > (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { - printk(KERN_ERR "EXT4-fs: filesystem on %s:" - " too large to mount safely\n", sb->s_id); + ext4_msg(sb, KERN_ERR, "filesystem" + " too large to mount safely"); if (sizeof(sector_t) < 8) - printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " - "enabled\n"); + ext4_msg(sb, KERN_WARNING, "CONFIG_LBD not enabled"); goto failed_mount; } if (EXT4_BLOCKS_PER_GROUP(sb) == 0) goto cantfind_ext4; - /* ensure blocks_count calculation below doesn't sign-extend */ - if (ext4_blocks_count(es) + EXT4_BLOCKS_PER_GROUP(sb) < - le32_to_cpu(es->s_first_data_block) + 1) { - printk(KERN_WARNING "EXT4-fs: bad geometry: block count %llu, " - "first data block %u, blocks per group %lu\n", - ext4_blocks_count(es), - le32_to_cpu(es->s_first_data_block), - EXT4_BLOCKS_PER_GROUP(sb)); + /* check blocks count against device size */ + blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; + if (blocks_count && ext4_blocks_count(es) > blocks_count) { + ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " + "exceeds size of device (%llu blocks)", + ext4_blocks_count(es), blocks_count); + goto failed_mount; + } + + /* + * It makes no sense for the first data block to be beyond the end + * of the filesystem. + */ + if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { + ext4_msg(sb, KERN_WARNING, "bad geometry: first data" + "block %u is beyond end of filesystem (%llu)", + le32_to_cpu(es->s_first_data_block), + ext4_blocks_count(es)); goto failed_mount; } blocks_count = (ext4_blocks_count(es) - le32_to_cpu(es->s_first_data_block) + EXT4_BLOCKS_PER_GROUP(sb) - 1); do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); + if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { + ext4_msg(sb, KERN_WARNING, "groups count too large: %u " + "(block count %llu, first data block %u, " + "blocks per group %lu)", sbi->s_groups_count, + ext4_blocks_count(es), + le32_to_cpu(es->s_first_data_block), + EXT4_BLOCKS_PER_GROUP(sb)); + goto failed_mount; + } sbi->s_groups_count = blocks_count; db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / EXT4_DESC_PER_BLOCK(sb); - sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *), + sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), GFP_KERNEL); if (sbi->s_group_desc == NULL) { - printk (KERN_ERR "EXT4-fs: not enough memory\n"); + ext4_msg(sb, KERN_ERR, "not enough memory"); goto failed_mount; } - bgl_lock_init(&sbi->s_blockgroup_lock); +#ifdef CONFIG_PROC_FS + if (ext4_proc_root) + sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); +#endif + + bgl_lock_init(sbi->s_blockgroup_lock); for (i = 0; i < db_count; i++) { block = descriptor_loc(sb, logical_sb_block, i); sbi->s_group_desc[i] = sb_bread(sb, block); if (!sbi->s_group_desc[i]) { - printk (KERN_ERR "EXT4-fs: " - "can't read group descriptor %d\n", i); + ext4_msg(sb, KERN_ERR, + "can't read group descriptor %d", i); db_count = i; goto failed_mount2; } } - if (!ext4_check_descriptors (sb)) { - printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); + if (!ext4_check_descriptors(sb)) { + ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); goto failed_mount2; } if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) if (!ext4_fill_flex_info(sb)) { - printk(KERN_ERR - "EXT4-fs: unable to initialize " - "flex_bg meta info!\n"); + ext4_msg(sb, KERN_ERR, + "unable to initialize " + "flex_bg meta info!"); goto failed_mount2; } @@ -2211,30 +2656,24 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) err = percpu_counter_init(&sbi->s_dirs_counter, ext4_count_dirs(sb)); } + if (!err) { + err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); + } if (err) { - printk(KERN_ERR "EXT4-fs: insufficient memory\n"); + ext4_msg(sb, KERN_ERR, "insufficient memory"); goto failed_mount3; } - /* per fileystem reservation list head & lock */ - spin_lock_init(&sbi->s_rsv_window_lock); - sbi->s_rsv_window_root = RB_ROOT; - /* Add a single, static dummy reservation to the start of the - * reservation window list --- it gives us a placeholder for - * append-at-start-of-list which makes the allocation logic - * _much_ simpler. */ - sbi->s_rsv_window_head.rsv_start = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; - sbi->s_rsv_window_head.rsv_end = EXT4_RESERVE_WINDOW_NOT_ALLOCATED; - sbi->s_rsv_window_head.rsv_alloc_hit = 0; - sbi->s_rsv_window_head.rsv_goal_size = 0; - ext4_rsv_window_add(sb, &sbi->s_rsv_window_head); - sbi->s_stripe = ext4_get_stripe_size(sbi); /* * set up enough so that it can read an inode */ - sb->s_op = &ext4_sops; + if (!test_opt(sb, NOLOAD) && + EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) + sb->s_op = &ext4_sops; + else + sb->s_op = &ext4_nojournal_sops; sb->s_export_op = &ext4_export_ops; sb->s_xattr = ext4_xattr_handlers; #ifdef CONFIG_QUOTA @@ -2242,6 +2681,8 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) sb->dq_op = &ext4_quota_operations; #endif INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ + mutex_init(&sbi->s_orphan_lock); + mutex_init(&sbi->s_resize_lock); sb->s_root = NULL; @@ -2259,13 +2700,13 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) goto failed_mount3; if (!(sb->s_flags & MS_RDONLY) && EXT4_SB(sb)->s_journal->j_failed_commit) { - printk(KERN_CRIT "EXT4-fs error (device %s): " + ext4_msg(sb, KERN_CRIT, "error: " "ext4_fill_super: Journal transaction " - "%u is corrupt\n", sb->s_id, + "%u is corrupt", EXT4_SB(sb)->s_journal->j_failed_commit); - if (test_opt (sb, ERRORS_RO)) { - printk (KERN_CRIT - "Mounting filesystem read-only\n"); + if (test_opt(sb, ERRORS_RO)) { + ext4_msg(sb, KERN_CRIT, + "Mounting filesystem read-only"); sb->s_flags |= MS_RDONLY; EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; es->s_state |= cpu_to_le16(EXT4_ERROR_FS); @@ -2273,28 +2714,27 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) if (test_opt(sb, ERRORS_PANIC)) { EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; es->s_state |= cpu_to_le16(EXT4_ERROR_FS); - ext4_commit_super(sb, es, 1); - printk(KERN_CRIT - "EXT4-fs (device %s): mount failed\n", - sb->s_id); + ext4_commit_super(sb, 1); goto failed_mount4; } } - } else if (journal_inum) { - if (ext4_create_journal(sb, es, journal_inum)) - goto failed_mount3; + } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && + EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { + ext4_msg(sb, KERN_ERR, "required journal recovery " + "suppressed and not mounted read-only"); + goto failed_mount4; } else { - if (!silent) - printk (KERN_ERR - "ext4: No journal on filesystem on %s\n", - sb->s_id); - goto failed_mount3; + clear_opt(sbi->s_mount_opt, DATA_FLAGS); + set_opt(sbi->s_mount_opt, WRITEBACK_DATA); + sbi->s_journal = NULL; + needs_recovery = 0; + goto no_journal; } if (ext4_blocks_count(es) > 0xffffffffULL && !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_64BIT)) { - printk(KERN_ERR "ext4: Failed to set 64-bit journal feature\n"); + ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); goto failed_mount4; } @@ -2332,18 +2772,21 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) case EXT4_MOUNT_WRITEBACK_DATA: if (!jbd2_journal_check_available_features (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { - printk(KERN_ERR "EXT4-fs: Journal does not support " - "requested data journaling mode\n"); + ext4_msg(sb, KERN_ERR, "Journal does not support " + "requested data journaling mode"); goto failed_mount4; } default: break; } + set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); + +no_journal: if (test_opt(sb, NOBH)) { if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { - printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " - "its supported only with writeback mode\n"); + ext4_msg(sb, KERN_WARNING, "Ignoring nobh option - " + "its supported only with writeback mode"); clear_opt(sbi->s_mount_opt, NOBH); } } @@ -2354,24 +2797,24 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) root = ext4_iget(sb, EXT4_ROOT_INO); if (IS_ERR(root)) { - printk(KERN_ERR "EXT4-fs: get root inode failed\n"); + ext4_msg(sb, KERN_ERR, "get root inode failed"); ret = PTR_ERR(root); goto failed_mount4; } if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { iput(root); - printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); + ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); goto failed_mount4; } sb->s_root = d_alloc_root(root); if (!sb->s_root) { - printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); + ext4_msg(sb, KERN_ERR, "get root dentry failed"); iput(root); ret = -ENOMEM; goto failed_mount4; } - ext4_setup_super (sb, es, sb->s_flags & MS_RDONLY); + ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); /* determine the minimum size of new large inodes, if present */ if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { @@ -2394,53 +2837,95 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) sbi->s_inode_size) { sbi->s_want_extra_isize = sizeof(struct ext4_inode) - EXT4_GOOD_OLD_INODE_SIZE; - printk(KERN_INFO "EXT4-fs: required extra inode space not" - "available.\n"); + ext4_msg(sb, KERN_INFO, "required extra inode space not" + "available"); } - /* - * akpm: core read_super() calls in here with the superblock locked. - * That deadlocks, because orphan cleanup needs to lock the superblock - * in numerous places. Here we just pop the lock - it's relatively - * harmless, because we are now ready to accept write_super() requests, - * and aviro says that's the only reason for hanging onto the - * superblock lock. - */ + if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { + ext4_msg(sb, KERN_WARNING, "Ignoring delalloc option - " + "requested data journaling mode"); + clear_opt(sbi->s_mount_opt, DELALLOC); + } else if (test_opt(sb, DELALLOC)) + ext4_msg(sb, KERN_INFO, "delayed allocation enabled"); + + err = ext4_setup_system_zone(sb); + if (err) { + ext4_msg(sb, KERN_ERR, "failed to initialize system " + "zone (%d)\n", err); + goto failed_mount4; + } + + ext4_ext_init(sb); + err = ext4_mb_init(sb, needs_recovery); + if (err) { + ext4_msg(sb, KERN_ERR, "failed to initalize mballoc (%d)", + err); + goto failed_mount4; + } + + sbi->s_kobj.kset = ext4_kset; + init_completion(&sbi->s_kobj_unregister); + err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, + "%s", sb->s_id); + if (err) { + ext4_mb_release(sb); + ext4_ext_release(sb); + goto failed_mount4; + }; + EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; ext4_orphan_cleanup(sb, es); EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; - if (needs_recovery) - printk (KERN_INFO "EXT4-fs: recovery complete.\n"); - ext4_mark_recovery_complete(sb, es); - printk (KERN_INFO "EXT4-fs: mounted filesystem with %s data mode.\n", - test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ? "journal": - test_opt(sb,DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA ? "ordered": - "writeback"); + if (needs_recovery) { + ext4_msg(sb, KERN_INFO, "recovery complete"); + ext4_mark_recovery_complete(sb, es); + } + if (EXT4_SB(sb)->s_journal) { + if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) + descr = " journalled data mode"; + else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) + descr = " ordered data mode"; + else + descr = " writeback data mode"; + } else + descr = "out journal"; - ext4_ext_init(sb); - ext4_mb_init(sb, needs_recovery); + ext4_msg(sb, KERN_INFO, "mounted filesystem with%s", descr); lock_kernel(); return 0; cantfind_ext4: if (!silent) - printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", - sb->s_id); + ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); goto failed_mount; failed_mount4: - jbd2_journal_destroy(sbi->s_journal); - sbi->s_journal = NULL; + ext4_msg(sb, KERN_ERR, "mount failed"); + ext4_release_system_zone(sb); + if (sbi->s_journal) { + jbd2_journal_destroy(sbi->s_journal); + sbi->s_journal = NULL; + } failed_mount3: + if (sbi->s_flex_groups) { + if (is_vmalloc_addr(sbi->s_flex_groups)) + vfree(sbi->s_flex_groups); + else + kfree(sbi->s_flex_groups); + } percpu_counter_destroy(&sbi->s_freeblocks_counter); percpu_counter_destroy(&sbi->s_freeinodes_counter); percpu_counter_destroy(&sbi->s_dirs_counter); + percpu_counter_destroy(&sbi->s_dirtyblocks_counter); failed_mount2: for (i = 0; i < db_count; i++) brelse(sbi->s_group_desc[i]); kfree(sbi->s_group_desc); failed_mount: + if (sbi->s_proc) { + remove_proc_entry(sb->s_id, ext4_proc_root); + } #ifdef CONFIG_QUOTA for (i = 0; i < MAXQUOTAS; i++) kfree(sbi->s_qf_names[i]); @@ -2449,6 +2934,7 @@ failed_mount: brelse(bh); out_fail: sb->s_fs_info = NULL; + kfree(sbi->s_blockgroup_lock); kfree(sbi); lock_kernel(); return ret; @@ -2463,17 +2949,19 @@ static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) { struct ext4_sb_info *sbi = EXT4_SB(sb); - if (sbi->s_commit_interval) - journal->j_commit_interval = sbi->s_commit_interval; - /* We could also set up an ext4-specific default for the commit - * interval here, but for now we'll just fall back to the jbd - * default. */ + journal->j_commit_interval = sbi->s_commit_interval; + journal->j_min_batch_time = sbi->s_min_batch_time; + journal->j_max_batch_time = sbi->s_max_batch_time; spin_lock(&journal->j_state_lock); if (test_opt(sb, BARRIER)) journal->j_flags |= JBD2_BARRIER; else journal->j_flags &= ~JBD2_BARRIER; + if (test_opt(sb, DATA_ERR_ABORT)) + journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; + else + journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; spin_unlock(&journal->j_state_lock); } @@ -2483,33 +2971,35 @@ static journal_t *ext4_get_journal(struct super_block *sb, struct inode *journal_inode; journal_t *journal; + BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); + /* First, test for the existence of a valid inode on disk. Bad * things happen if we iget() an unused inode, as the subsequent * iput() will try to delete it. */ journal_inode = ext4_iget(sb, journal_inum); if (IS_ERR(journal_inode)) { - printk(KERN_ERR "EXT4-fs: no journal found.\n"); + ext4_msg(sb, KERN_ERR, "no journal found"); return NULL; } if (!journal_inode->i_nlink) { make_bad_inode(journal_inode); iput(journal_inode); - printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); + ext4_msg(sb, KERN_ERR, "journal inode is deleted"); return NULL; } - jbd_debug(2, "Journal inode found at %p: %Ld bytes\n", + jbd_debug(2, "Journal inode found at %p: %lld bytes\n", journal_inode, journal_inode->i_size); if (!S_ISREG(journal_inode->i_mode)) { - printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); + ext4_msg(sb, KERN_ERR, "invalid journal inode"); iput(journal_inode); return NULL; } journal = jbd2_journal_init_inode(journal_inode); if (!journal) { - printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); + ext4_msg(sb, KERN_ERR, "Could not load journal inode"); iput(journal_inode); return NULL; } @@ -2521,32 +3011,34 @@ static journal_t *ext4_get_journal(struct super_block *sb, static journal_t *ext4_get_dev_journal(struct super_block *sb, dev_t j_dev) { - struct buffer_head * bh; + struct buffer_head *bh; journal_t *journal; ext4_fsblk_t start; ext4_fsblk_t len; int hblock, blocksize; ext4_fsblk_t sb_block; unsigned long offset; - struct ext4_super_block * es; + struct ext4_super_block *es; struct block_device *bdev; - bdev = ext4_blkdev_get(j_dev); + BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); + + bdev = ext4_blkdev_get(j_dev, sb); if (bdev == NULL) return NULL; if (bd_claim(bdev, sb)) { - printk(KERN_ERR - "EXT4: failed to claim external journal device.\n"); - blkdev_put(bdev); + ext4_msg(sb, KERN_ERR, + "failed to claim external journal device"); + blkdev_put(bdev, FMODE_READ|FMODE_WRITE); return NULL; } blocksize = sb->s_blocksize; - hblock = bdev_hardsect_size(bdev); + hblock = bdev_logical_block_size(bdev); if (blocksize < hblock) { - printk(KERN_ERR - "EXT4-fs: blocksize too small for journal device.\n"); + ext4_msg(sb, KERN_ERR, + "blocksize too small for journal device"); goto out_bdev; } @@ -2554,8 +3046,8 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb, offset = EXT4_MIN_BLOCK_SIZE % blocksize; set_blocksize(bdev, blocksize); if (!(bh = __bread(bdev, sb_block, blocksize))) { - printk(KERN_ERR "EXT4-fs: couldn't read superblock of " - "external journal\n"); + ext4_msg(sb, KERN_ERR, "couldn't read superblock of " + "external journal"); goto out_bdev; } @@ -2563,14 +3055,14 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb, if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || !(le32_to_cpu(es->s_feature_incompat) & EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { - printk(KERN_ERR "EXT4-fs: external journal has " - "bad superblock\n"); + ext4_msg(sb, KERN_ERR, "external journal has " + "bad superblock"); brelse(bh); goto out_bdev; } if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { - printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); + ext4_msg(sb, KERN_ERR, "journal UUID does not match"); brelse(bh); goto out_bdev; } @@ -2582,25 +3074,26 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb, journal = jbd2_journal_init_dev(bdev, sb->s_bdev, start, len, blocksize); if (!journal) { - printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); + ext4_msg(sb, KERN_ERR, "failed to create device journal"); goto out_bdev; } journal->j_private = sb; ll_rw_block(READ, 1, &journal->j_sb_buffer); wait_on_buffer(journal->j_sb_buffer); if (!buffer_uptodate(journal->j_sb_buffer)) { - printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); + ext4_msg(sb, KERN_ERR, "I/O error on journal device"); goto out_journal; } if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { - printk(KERN_ERR "EXT4-fs: External journal has more than one " - "user (unsupported) - %d\n", + ext4_msg(sb, KERN_ERR, "External journal has more than one " + "user (unsupported) - %d", be32_to_cpu(journal->j_superblock->s_nr_users)); goto out_journal; } EXT4_SB(sb)->journal_bdev = bdev; ext4_init_journal_params(sb, journal); return journal; + out_journal: jbd2_journal_destroy(journal); out_bdev: @@ -2618,10 +3111,12 @@ static int ext4_load_journal(struct super_block *sb, int err = 0; int really_read_only; + BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); + if (journal_devnum && journal_devnum != le32_to_cpu(es->s_journal_dev)) { - printk(KERN_INFO "EXT4-fs: external journal device major/minor " - "numbers have changed\n"); + ext4_msg(sb, KERN_INFO, "external journal device major/minor " + "numbers have changed"); journal_dev = new_decode_dev(journal_devnum); } else journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); @@ -2633,24 +3128,23 @@ static int ext4_load_journal(struct super_block *sb, * crash? For recovery, we need to check in advance whether we * can get read-write access to the device. */ - if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { if (sb->s_flags & MS_RDONLY) { - printk(KERN_INFO "EXT4-fs: INFO: recovery " - "required on readonly filesystem.\n"); + ext4_msg(sb, KERN_INFO, "INFO: recovery " + "required on readonly filesystem"); if (really_read_only) { - printk(KERN_ERR "EXT4-fs: write access " - "unavailable, cannot proceed.\n"); + ext4_msg(sb, KERN_ERR, "write access " + "unavailable, cannot proceed"); return -EROFS; } - printk (KERN_INFO "EXT4-fs: write access will " - "be enabled during recovery.\n"); + ext4_msg(sb, KERN_INFO, "write access will " + "be enabled during recovery"); } } if (journal_inum && journal_dev) { - printk(KERN_ERR "EXT4-fs: filesystem has both journal " - "and inode journals!\n"); + ext4_msg(sb, KERN_ERR, "filesystem has both journal " + "and inode journals!"); return -EINVAL; } @@ -2662,10 +3156,15 @@ static int ext4_load_journal(struct super_block *sb, return -EINVAL; } + if (journal->j_flags & JBD2_BARRIER) + ext4_msg(sb, KERN_INFO, "barriers enabled"); + else + ext4_msg(sb, KERN_INFO, "barriers disabled"); + if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { err = jbd2_journal_update_format(journal); if (err) { - printk(KERN_ERR "EXT4-fs: error updating journal.\n"); + ext4_msg(sb, KERN_ERR, "error updating journal"); jbd2_journal_destroy(journal); return err; } @@ -2677,7 +3176,7 @@ static int ext4_load_journal(struct super_block *sb, err = jbd2_journal_load(journal); if (err) { - printk(KERN_ERR "EXT4-fs: error loading journal.\n"); + ext4_msg(sb, KERN_ERR, "error loading journal"); jbd2_journal_destroy(journal); return err; } @@ -2688,95 +3187,89 @@ static int ext4_load_journal(struct super_block *sb, if (journal_devnum && journal_devnum != le32_to_cpu(es->s_journal_dev)) { es->s_journal_dev = cpu_to_le32(journal_devnum); - sb->s_dirt = 1; /* Make sure we flush the recovery flag to disk. */ - ext4_commit_super(sb, es, 1); - } - - return 0; -} - -static int ext4_create_journal(struct super_block * sb, - struct ext4_super_block * es, - unsigned int journal_inum) -{ - journal_t *journal; - int err; - - if (sb->s_flags & MS_RDONLY) { - printk(KERN_ERR "EXT4-fs: readonly filesystem when trying to " - "create journal.\n"); - return -EROFS; - } - - journal = ext4_get_journal(sb, journal_inum); - if (!journal) - return -EINVAL; - - printk(KERN_INFO "EXT4-fs: creating new journal on inode %u\n", - journal_inum); - - err = jbd2_journal_create(journal); - if (err) { - printk(KERN_ERR "EXT4-fs: error creating journal.\n"); - jbd2_journal_destroy(journal); - return -EIO; + ext4_commit_super(sb, 1); } - EXT4_SB(sb)->s_journal = journal; - - ext4_update_dynamic_rev(sb); - EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); - EXT4_SET_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL); - - es->s_journal_inum = cpu_to_le32(journal_inum); - sb->s_dirt = 1; - - /* Make sure we flush the recovery flag to disk. */ - ext4_commit_super(sb, es, 1); - return 0; } -static void ext4_commit_super (struct super_block * sb, - struct ext4_super_block * es, - int sync) +static int ext4_commit_super(struct super_block *sb, int sync) { + struct ext4_super_block *es = EXT4_SB(sb)->s_es; struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; + int error = 0; if (!sbh) - return; + return error; + if (buffer_write_io_error(sbh)) { + /* + * Oh, dear. A previous attempt to write the + * superblock failed. This could happen because the + * USB device was yanked out. Or it could happen to + * be a transient write error and maybe the block will + * be remapped. Nothing we can do but to retry the + * write and hope for the best. + */ + ext4_msg(sb, KERN_ERR, "previous I/O error to " + "superblock detected"); + clear_buffer_write_io_error(sbh); + set_buffer_uptodate(sbh); + } es->s_wtime = cpu_to_le32(get_seconds()); - ext4_free_blocks_count_set(es, ext4_count_free_blocks(sb)); - es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); + es->s_kbytes_written = + cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + + ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - + EXT4_SB(sb)->s_sectors_written_start) >> 1)); + ext4_free_blocks_count_set(es, percpu_counter_sum_positive( + &EXT4_SB(sb)->s_freeblocks_counter)); + es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( + &EXT4_SB(sb)->s_freeinodes_counter)); + sb->s_dirt = 0; BUFFER_TRACE(sbh, "marking dirty"); mark_buffer_dirty(sbh); - if (sync) - sync_dirty_buffer(sbh); + if (sync) { + error = sync_dirty_buffer(sbh); + if (error) + return error; + + error = buffer_write_io_error(sbh); + if (error) { + ext4_msg(sb, KERN_ERR, "I/O error while writing " + "superblock"); + clear_buffer_write_io_error(sbh); + set_buffer_uptodate(sbh); + } + } + return error; } - /* * Have we just finished recovery? If so, and if we are mounting (or * remounting) the filesystem readonly, then we will end up with a * consistent fs on disk. Record that fact. */ -static void ext4_mark_recovery_complete(struct super_block * sb, - struct ext4_super_block * es) +static void ext4_mark_recovery_complete(struct super_block *sb, + struct ext4_super_block *es) { journal_t *journal = EXT4_SB(sb)->s_journal; + if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { + BUG_ON(journal != NULL); + return; + } jbd2_journal_lock_updates(journal); - jbd2_journal_flush(journal); - lock_super(sb); + if (jbd2_journal_flush(journal) < 0) + goto out; + if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && sb->s_flags & MS_RDONLY) { EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); - sb->s_dirt = 0; - ext4_commit_super(sb, es, 1); + ext4_commit_super(sb, 1); } - unlock_super(sb); + +out: jbd2_journal_unlock_updates(journal); } @@ -2785,13 +3278,15 @@ static void ext4_mark_recovery_complete(struct super_block * sb, * has recorded an error from a previous lifetime, move that error to the * main filesystem now. */ -static void ext4_clear_journal_err(struct super_block * sb, - struct ext4_super_block * es) +static void ext4_clear_journal_err(struct super_block *sb, + struct ext4_super_block *es) { journal_t *journal; int j_errno; const char *errstr; + BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); + journal = EXT4_SB(sb)->s_journal; /* @@ -2811,7 +3306,7 @@ static void ext4_clear_journal_err(struct super_block * sb, EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; es->s_state |= cpu_to_le16(EXT4_ERROR_FS); - ext4_commit_super (sb, es, 1); + ext4_commit_super(sb, 1); jbd2_journal_clear_err(journal); } @@ -2824,89 +3319,99 @@ static void ext4_clear_journal_err(struct super_block * sb, int ext4_force_commit(struct super_block *sb) { journal_t *journal; - int ret; + int ret = 0; if (sb->s_flags & MS_RDONLY) return 0; journal = EXT4_SB(sb)->s_journal; - sb->s_dirt = 0; - ret = ext4_journal_force_commit(journal); + if (journal) + ret = ext4_journal_force_commit(journal); + return ret; } -/* - * Ext4 always journals updates to the superblock itself, so we don't - * have to propagate any other updates to the superblock on disk at this - * point. Just start an async writeback to get the buffers on their way - * to the disk. - * - * This implicitly triggers the writebehind on sync(). - */ - -static void ext4_write_super (struct super_block * sb) +static void ext4_write_super(struct super_block *sb) { - if (mutex_trylock(&sb->s_lock) != 0) - BUG(); - sb->s_dirt = 0; + ext4_commit_super(sb, 1); } static int ext4_sync_fs(struct super_block *sb, int wait) { + int ret = 0; tid_t target; - sb->s_dirt = 0; + trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); if (jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, &target)) { if (wait) jbd2_log_wait_commit(EXT4_SB(sb)->s_journal, target); } - return 0; + return ret; } /* * LVM calls this function before a (read-only) snapshot is created. This * gives us a chance to flush the journal completely and mark the fs clean. */ -static void ext4_write_super_lockfs(struct super_block *sb) +static int ext4_freeze(struct super_block *sb) { - sb->s_dirt = 0; + int error = 0; + journal_t *journal; - if (!(sb->s_flags & MS_RDONLY)) { - journal_t *journal = EXT4_SB(sb)->s_journal; + if (sb->s_flags & MS_RDONLY) + return 0; - /* Now we set up the journal barrier. */ - jbd2_journal_lock_updates(journal); - jbd2_journal_flush(journal); + journal = EXT4_SB(sb)->s_journal; - /* Journal blocked and flushed, clear needs_recovery flag. */ - EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); - ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); + /* Now we set up the journal barrier. */ + jbd2_journal_lock_updates(journal); + + /* + * Don't clear the needs_recovery flag if we failed to flush + * the journal. + */ + error = jbd2_journal_flush(journal); + if (error < 0) { + out: + jbd2_journal_unlock_updates(journal); + return error; } + + /* Journal blocked and flushed, clear needs_recovery flag. */ + EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); + error = ext4_commit_super(sb, 1); + if (error) + goto out; + return 0; } /* * Called by LVM after the snapshot is done. We need to reset the RECOVER * flag here, even though the filesystem is not technically dirty yet. */ -static void ext4_unlockfs(struct super_block *sb) +static int ext4_unfreeze(struct super_block *sb) { - if (!(sb->s_flags & MS_RDONLY)) { - lock_super(sb); - /* Reser the needs_recovery flag before the fs is unlocked. */ - EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); - ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); - unlock_super(sb); - jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); - } + if (sb->s_flags & MS_RDONLY) + return 0; + + lock_super(sb); + /* Reset the needs_recovery flag before the fs is unlocked. */ + EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); + ext4_commit_super(sb, 1); + unlock_super(sb); + jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); + return 0; } -static int ext4_remount (struct super_block * sb, int * flags, char * data) +static int ext4_remount(struct super_block *sb, int *flags, char *data) { - struct ext4_super_block * es; + struct ext4_super_block *es; struct ext4_sb_info *sbi = EXT4_SB(sb); ext4_fsblk_t n_blocks_count = 0; unsigned long old_sb_flags; struct ext4_mount_options old_opts; + ext4_group_t g; + unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; int err; #ifdef CONFIG_QUOTA int i; @@ -2918,16 +3423,21 @@ static int ext4_remount (struct super_block * sb, int * flags, char * data) old_opts.s_resuid = sbi->s_resuid; old_opts.s_resgid = sbi->s_resgid; old_opts.s_commit_interval = sbi->s_commit_interval; + old_opts.s_min_batch_time = sbi->s_min_batch_time; + old_opts.s_max_batch_time = sbi->s_max_batch_time; #ifdef CONFIG_QUOTA old_opts.s_jquota_fmt = sbi->s_jquota_fmt; for (i = 0; i < MAXQUOTAS; i++) old_opts.s_qf_names[i] = sbi->s_qf_names[i]; #endif + if (sbi->s_journal && sbi->s_journal->j_task->io_context) + journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; /* * Allow the "check" option to be passed as a remount option. */ - if (!parse_options(data, sb, NULL, NULL, &n_blocks_count, 1)) { + if (!parse_options(data, sb, NULL, &journal_ioprio, + &n_blocks_count, 1)) { err = -EINVAL; goto restore_opts; } @@ -2940,7 +3450,10 @@ static int ext4_remount (struct super_block * sb, int * flags, char * data) es = sbi->s_es; - ext4_init_journal_params(sb, sbi->s_journal); + if (sbi->s_journal) { + ext4_init_journal_params(sb, sbi->s_journal); + set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); + } if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || n_blocks_count > ext4_blocks_count(es)) { @@ -2965,36 +3478,49 @@ static int ext4_remount (struct super_block * sb, int * flags, char * data) (sbi->s_mount_state & EXT4_VALID_FS)) es->s_state = cpu_to_le16(sbi->s_mount_state); - /* - * We have to unlock super so that we can wait for - * transactions. - */ - unlock_super(sb); - ext4_mark_recovery_complete(sb, es); - lock_super(sb); + if (sbi->s_journal) + ext4_mark_recovery_complete(sb, es); } else { - __le32 ret; + int ret; if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP))) { - printk(KERN_WARNING "EXT4-fs: %s: couldn't " + ext4_msg(sb, KERN_WARNING, "couldn't " "remount RDWR because of unsupported " - "optional features (%x).\n", - sb->s_id, le32_to_cpu(ret)); + "optional features (%x)", + (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & + ~EXT4_FEATURE_RO_COMPAT_SUPP)); err = -EROFS; goto restore_opts; } /* + * Make sure the group descriptor checksums + * are sane. If they aren't, refuse to remount r/w. + */ + for (g = 0; g < sbi->s_groups_count; g++) { + struct ext4_group_desc *gdp = + ext4_get_group_desc(sb, g, NULL); + + if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { + ext4_msg(sb, KERN_ERR, + "ext4_remount: Checksum for group %u failed (%u!=%u)", + g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), + le16_to_cpu(gdp->bg_checksum)); + err = -EINVAL; + goto restore_opts; + } + } + + /* * If we have an unprocessed orphan list hanging * around from a previously readonly bdev mount, * require a full umount/remount for now. */ if (es->s_last_orphan) { - printk(KERN_WARNING "EXT4-fs: %s: couldn't " + ext4_msg(sb, KERN_WARNING, "Couldn't " "remount RDWR because of unprocessed " "orphan inode list. Please " - "umount/remount instead.\n", - sb->s_id); + "umount/remount instead"); err = -EINVAL; goto restore_opts; } @@ -3005,14 +3531,19 @@ static int ext4_remount (struct super_block * sb, int * flags, char * data) * been changed by e2fsck since we originally mounted * the partition.) */ - ext4_clear_journal_err(sb, es); + if (sbi->s_journal) + ext4_clear_journal_err(sb, es); sbi->s_mount_state = le16_to_cpu(es->s_state); if ((err = ext4_group_extend(sb, es, n_blocks_count))) goto restore_opts; - if (!ext4_setup_super (sb, es, 0)) + if (!ext4_setup_super(sb, es, 0)) sb->s_flags &= ~MS_RDONLY; } } + ext4_setup_system_zone(sb); + if (sbi->s_journal == NULL) + ext4_commit_super(sb, 1); + #ifdef CONFIG_QUOTA /* Release old quota file names */ for (i = 0; i < MAXQUOTAS; i++) @@ -3021,12 +3552,15 @@ static int ext4_remount (struct super_block * sb, int * flags, char * data) kfree(old_opts.s_qf_names[i]); #endif return 0; + restore_opts: sb->s_flags = old_sb_flags; sbi->s_mount_opt = old_opts.s_mount_opt; sbi->s_resuid = old_opts.s_resuid; sbi->s_resgid = old_opts.s_resgid; sbi->s_commit_interval = old_opts.s_commit_interval; + sbi->s_min_batch_time = old_opts.s_min_batch_time; + sbi->s_max_batch_time = old_opts.s_max_batch_time; #ifdef CONFIG_QUOTA sbi->s_jquota_fmt = old_opts.s_jquota_fmt; for (i = 0; i < MAXQUOTAS; i++) { @@ -3039,7 +3573,7 @@ restore_opts: return err; } -static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) +static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) { struct super_block *sb = dentry->d_sb; struct ext4_sb_info *sbi = EXT4_SB(sb); @@ -3049,9 +3583,8 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) if (test_opt(sb, MINIX_DF)) { sbi->s_overhead_last = 0; } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { - ext4_group_t ngroups = sbi->s_groups_count, i; + ext4_group_t i, ngroups = ext4_get_groups_count(sb); ext4_fsblk_t overhead = 0; - smp_rmb(); /* * Compute the overhead (FS structures). This is constant @@ -3089,7 +3622,8 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) buf->f_type = EXT4_SUPER_MAGIC; buf->f_bsize = sb->s_blocksize; buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; - buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter); + buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - + percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); ext4_free_blocks_count_set(es, buf->f_bfree); buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); if (buf->f_bfree < ext4_r_blocks_count(es)) @@ -3102,15 +3636,16 @@ static int ext4_statfs (struct dentry * dentry, struct kstatfs * buf) le64_to_cpup((void *)es->s_uuid + sizeof(u64)); buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; + return 0; } -/* Helper function for writing quotas on sync - we need to start transaction before quota file - * is locked for write. Otherwise the are possible deadlocks: +/* Helper function for writing quotas on sync - we need to start transaction + * before quota file is locked for write. Otherwise the are possible deadlocks: * Process 1 Process 2 * ext4_create() quota_sync() - * jbd2_journal_start() write_dquot() - * DQUOT_INIT() down(dqio_mutex) + * jbd2_journal_start() write_dquot() + * vfs_dq_init() down(dqio_mutex) * down(dqio_mutex) jbd2_journal_start() * */ @@ -3122,44 +3657,6 @@ static inline struct inode *dquot_to_inode(struct dquot *dquot) return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; } -static int ext4_dquot_initialize(struct inode *inode, int type) -{ - handle_t *handle; - int ret, err; - - /* We may create quota structure so we need to reserve enough blocks */ - handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); - if (IS_ERR(handle)) - return PTR_ERR(handle); - ret = dquot_initialize(inode, type); - err = ext4_journal_stop(handle); - if (!ret) - ret = err; - return ret; -} - -static int ext4_dquot_drop(struct inode *inode) -{ - handle_t *handle; - int ret, err; - - /* We may delete quota structure so we need to reserve enough blocks */ - handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); - if (IS_ERR(handle)) { - /* - * We call dquot_drop() anyway to at least release references - * to quota structures so that umount does not hang. - */ - dquot_drop(inode); - return PTR_ERR(handle); - } - ret = dquot_drop(inode); - err = ext4_journal_stop(handle); - if (!ret) - ret = err; - return ret; -} - static int ext4_write_dquot(struct dquot *dquot) { int ret, err; @@ -3168,7 +3665,7 @@ static int ext4_write_dquot(struct dquot *dquot) inode = dquot_to_inode(dquot); handle = ext4_journal_start(inode, - EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); + EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); if (IS_ERR(handle)) return PTR_ERR(handle); ret = dquot_commit(dquot); @@ -3184,7 +3681,7 @@ static int ext4_acquire_dquot(struct dquot *dquot) handle_t *handle; handle = ext4_journal_start(dquot_to_inode(dquot), - EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); + EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); if (IS_ERR(handle)) return PTR_ERR(handle); ret = dquot_acquire(dquot); @@ -3200,7 +3697,7 @@ static int ext4_release_dquot(struct dquot *dquot) handle_t *handle; handle = ext4_journal_start(dquot_to_inode(dquot), - EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); + EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); if (IS_ERR(handle)) { /* Release dquot anyway to avoid endless cycle in dqput() */ dquot_release(dquot); @@ -3248,58 +3745,64 @@ static int ext4_write_info(struct super_block *sb, int type) static int ext4_quota_on_mount(struct super_block *sb, int type) { return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], - EXT4_SB(sb)->s_jquota_fmt, type); + EXT4_SB(sb)->s_jquota_fmt, type); } /* * Standard function to be called on quota_on */ static int ext4_quota_on(struct super_block *sb, int type, int format_id, - char *path, int remount) + char *name, int remount) { int err; - struct nameidata nd; + struct path path; if (!test_opt(sb, QUOTA)) return -EINVAL; - /* When remounting, no checks are needed and in fact, path is NULL */ + /* When remounting, no checks are needed and in fact, name is NULL */ if (remount) - return vfs_quota_on(sb, type, format_id, path, remount); + return vfs_quota_on(sb, type, format_id, name, remount); - err = path_lookup(path, LOOKUP_FOLLOW, &nd); + err = kern_path(name, LOOKUP_FOLLOW, &path); if (err) return err; /* Quotafile not on the same filesystem? */ - if (nd.path.mnt->mnt_sb != sb) { - path_put(&nd.path); + if (path.mnt->mnt_sb != sb) { + path_put(&path); return -EXDEV; } /* Journaling quota? */ if (EXT4_SB(sb)->s_qf_names[type]) { - /* Quotafile not of fs root? */ - if (nd.path.dentry->d_parent->d_inode != sb->s_root->d_inode) - printk(KERN_WARNING - "EXT4-fs: Quota file not on filesystem root. " - "Journaled quota will not work.\n"); - } + /* Quotafile not in fs root? */ + if (path.dentry->d_parent != sb->s_root) + ext4_msg(sb, KERN_WARNING, + "Quota file not on filesystem root. " + "Journaled quota will not work"); + } /* * When we journal data on quota file, we have to flush journal to see * all updates to the file when we bypass pagecache... */ - if (ext4_should_journal_data(nd.path.dentry->d_inode)) { + if (EXT4_SB(sb)->s_journal && + ext4_should_journal_data(path.dentry->d_inode)) { /* * We don't need to lock updates but journal_flush() could * otherwise be livelocked... */ jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); - jbd2_journal_flush(EXT4_SB(sb)->s_journal); + err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); + if (err) { + path_put(&path); + return err; + } } - path_put(&nd.path); - return vfs_quota_on(sb, type, format_id, path, remount); + err = vfs_quota_on_path(sb, type, format_id, &path); + path_put(&path); + return err; } /* Read data from quotafile - avoid pagecache and such because we cannot afford @@ -3357,9 +3860,9 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type, struct buffer_head *bh; handle_t *handle = journal_current_handle(); - if (!handle) { - printk(KERN_WARNING "EXT4-fs: Quota write (off=%Lu, len=%Lu)" - " cancelled because transaction is not started.\n", + if (EXT4_SB(sb)->s_journal && !handle) { + ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" + " cancelled because transaction is not started", (unsigned long long)off, (unsigned long long)len); return -EIO; } @@ -3382,7 +3885,7 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type, flush_dcache_page(bh->b_page); unlock_buffer(bh); if (journal_quota) - err = ext4_journal_dirty_metadata(handle, bh); + err = ext4_handle_dirty_metadata(handle, NULL, bh); else { /* Always do at least ordered writes for quotas */ err = ext4_jbd2_file_inode(handle, inode); @@ -3413,27 +3916,55 @@ out: #endif -static int ext4_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, struct vfsmount *mnt) +static int ext4_get_sb(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data, struct vfsmount *mnt) { - return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); + return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); +} + +static struct file_system_type ext4_fs_type = { + .owner = THIS_MODULE, + .name = "ext4", + .get_sb = ext4_get_sb, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; + +#ifdef CONFIG_EXT4DEV_COMPAT +static int ext4dev_get_sb(struct file_system_type *fs_type, int flags, + const char *dev_name, void *data,struct vfsmount *mnt) +{ + printk(KERN_WARNING "EXT4-fs (%s): Update your userspace programs " + "to mount using ext4\n", dev_name); + printk(KERN_WARNING "EXT4-fs (%s): ext4dev backwards compatibility " + "will go away by 2.6.31\n", dev_name); + return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super,mnt); } static struct file_system_type ext4dev_fs_type = { .owner = THIS_MODULE, .name = "ext4dev", - .get_sb = ext4_get_sb, + .get_sb = ext4dev_get_sb, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; +MODULE_ALIAS("ext4dev"); +#endif static int __init init_ext4_fs(void) { int err; - err = init_ext4_mballoc(); + err = init_ext4_system_zone(); if (err) return err; + ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); + if (!ext4_kset) + goto out4; + ext4_proc_root = proc_mkdir("fs/ext4", NULL); + err = init_ext4_mballoc(); + if (err) + goto out3; err = init_ext4_xattr(); if (err) @@ -3441,9 +3972,16 @@ static int __init init_ext4_fs(void) err = init_inodecache(); if (err) goto out1; - err = register_filesystem(&ext4dev_fs_type); + err = register_filesystem(&ext4_fs_type); if (err) goto out; +#ifdef CONFIG_EXT4DEV_COMPAT + err = register_filesystem(&ext4dev_fs_type); + if (err) { + unregister_filesystem(&ext4_fs_type); + goto out; + } +#endif return 0; out: destroy_inodecache(); @@ -3451,19 +3989,30 @@ out1: exit_ext4_xattr(); out2: exit_ext4_mballoc(); +out3: + remove_proc_entry("fs/ext4", NULL); + kset_unregister(ext4_kset); +out4: + exit_ext4_system_zone(); return err; } static void __exit exit_ext4_fs(void) { + unregister_filesystem(&ext4_fs_type); +#ifdef CONFIG_EXT4DEV_COMPAT unregister_filesystem(&ext4dev_fs_type); +#endif destroy_inodecache(); exit_ext4_xattr(); exit_ext4_mballoc(); + remove_proc_entry("fs/ext4", NULL); + kset_unregister(ext4_kset); + exit_ext4_system_zone(); } MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); -MODULE_DESCRIPTION("Fourth Extended Filesystem with extents"); +MODULE_DESCRIPTION("Fourth Extended Filesystem"); MODULE_LICENSE("GPL"); module_init(init_ext4_fs) module_exit(exit_ext4_fs)