diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ctree.h | 1 | ||||
| -rw-r--r-- | fs/btrfs/disk-io.c | 83 | ||||
| -rw-r--r-- | fs/btrfs/disk-io.h | 2 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 61 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 15 | ||||
| -rw-r--r-- | fs/btrfs/ioctl.c | 22 | ||||
| -rw-r--r-- | fs/btrfs/super.c | 37 |
7 files changed, 163 insertions, 58 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index f575939e025..c4c6c127323 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -541,6 +541,7 @@ struct btrfs_space_info { u64 bytes_used; u64 bytes_pinned; u64 bytes_reserved; + u64 bytes_readonly; int full; int force_alloc; struct list_head list; diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 3b0e974a9e9..c599f0ee997 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1075,10 +1075,12 @@ struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, kfree(root); return ERR_PTR(ret); } - ret = btrfs_find_dead_roots(fs_info->tree_root, - root->root_key.objectid, root); - BUG_ON(ret); - + if (!(fs_info->sb->s_flags & MS_RDONLY)) { + ret = btrfs_find_dead_roots(fs_info->tree_root, + root->root_key.objectid, root); + BUG_ON(ret); + btrfs_orphan_cleanup(root); + } return root; } @@ -1700,7 +1702,8 @@ struct btrfs_root *open_ctree(struct super_block *sb, btrfs_read_block_groups(extent_root); - fs_info->generation = btrfs_super_generation(disk_super) + 1; + fs_info->generation = generation + 1; + fs_info->last_trans_committed = generation; fs_info->data_alloc_profile = (u64)-1; fs_info->metadata_alloc_profile = (u64)-1; fs_info->system_alloc_profile = fs_info->metadata_alloc_profile; @@ -1715,6 +1718,9 @@ struct btrfs_root *open_ctree(struct super_block *sb, if (!fs_info->transaction_kthread) goto fail_cleaner; + if (sb->s_flags & MS_RDONLY) + return tree_root; + if (btrfs_super_log_root(disk_super) != 0) { u32 blocksize; u64 bytenr = btrfs_super_log_root(disk_super); @@ -1735,7 +1741,6 @@ struct btrfs_root *open_ctree(struct super_block *sb, ret = btrfs_recover_log_trees(log_tree_root); BUG_ON(ret); } - fs_info->last_trans_committed = btrfs_super_generation(disk_super); ret = btrfs_cleanup_reloc_trees(tree_root); BUG_ON(ret); @@ -1955,28 +1960,69 @@ static int del_fs_roots(struct btrfs_fs_info *fs_info) return 0; } -int close_ctree(struct btrfs_root *root) +int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info) { + u64 root_objectid = 0; + struct btrfs_root *gang[8]; + int i; int ret; - struct btrfs_trans_handle *trans; - struct btrfs_fs_info *fs_info = root->fs_info; - fs_info->closing = 1; - smp_mb(); + while (1) { + ret = radix_tree_gang_lookup(&fs_info->fs_roots_radix, + (void **)gang, root_objectid, + ARRAY_SIZE(gang)); + if (!ret) + break; + for (i = 0; i < ret; i++) { + root_objectid = gang[i]->root_key.objectid; + ret = btrfs_find_dead_roots(fs_info->tree_root, + root_objectid, gang[i]); + BUG_ON(ret); + btrfs_orphan_cleanup(gang[i]); + } + root_objectid++; + } + return 0; +} - kthread_stop(root->fs_info->transaction_kthread); - kthread_stop(root->fs_info->cleaner_kthread); +int btrfs_commit_super(struct btrfs_root *root) +{ + struct btrfs_trans_handle *trans; + int ret; + mutex_lock(&root->fs_info->cleaner_mutex); btrfs_clean_old_snapshots(root); + mutex_unlock(&root->fs_info->cleaner_mutex); trans = btrfs_start_transaction(root, 1); ret = btrfs_commit_transaction(trans, root); - /* run commit again to drop the original snapshot */ + BUG_ON(ret); + /* run commit again to drop the original snapshot */ trans = btrfs_start_transaction(root, 1); btrfs_commit_transaction(trans, root); ret = btrfs_write_and_wait_transaction(NULL, root); BUG_ON(ret); - write_ctree_super(NULL, root); + ret = write_ctree_super(NULL, root); + return ret; +} + +int close_ctree(struct btrfs_root *root) +{ + struct btrfs_fs_info *fs_info = root->fs_info; + int ret; + + fs_info->closing = 1; + smp_mb(); + + kthread_stop(root->fs_info->transaction_kthread); + kthread_stop(root->fs_info->cleaner_kthread); + + if (!(fs_info->sb->s_flags & MS_RDONLY)) { + ret = btrfs_commit_super(root); + if (ret) { + printk("btrfs: commit super returns %d\n", ret); + } + } if (fs_info->delalloc_bytes) { printk("btrfs: at unmount delalloc count %Lu\n", @@ -2000,12 +2046,10 @@ int close_ctree(struct btrfs_root *root) free_extent_buffer(root->fs_info->dev_root->node); btrfs_free_block_groups(root->fs_info); - fs_info->closing = 2; - del_fs_roots(fs_info); - filemap_write_and_wait(fs_info->btree_inode->i_mapping); + del_fs_roots(fs_info); - truncate_inode_pages(fs_info->btree_inode->i_mapping, 0); + iput(fs_info->btree_inode); btrfs_stop_workers(&fs_info->fixup_workers); btrfs_stop_workers(&fs_info->delalloc_workers); @@ -2014,7 +2058,6 @@ int close_ctree(struct btrfs_root *root) btrfs_stop_workers(&fs_info->endio_write_workers); btrfs_stop_workers(&fs_info->submit_workers); - iput(fs_info->btree_inode); #if 0 while(!list_empty(&fs_info->hashers)) { struct btrfs_hasher *hasher; diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index b8d5948fa27..717e94811e4 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -38,6 +38,7 @@ struct btrfs_root *open_ctree(struct super_block *sb, int close_ctree(struct btrfs_root *root); int write_ctree_super(struct btrfs_trans_handle *trans, struct btrfs_root *root); +int btrfs_commit_super(struct btrfs_root *root); struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize); struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info, @@ -49,6 +50,7 @@ struct btrfs_root *btrfs_read_fs_root_no_radix(struct btrfs_root *tree_root, struct btrfs_key *location); struct btrfs_root *btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info, struct btrfs_key *location); +int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); int btrfs_insert_dev_radix(struct btrfs_root *root, struct block_device *bdev, u64 device_id, diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index e785f0a0632..af2de30dbea 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -1794,7 +1794,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags, *space_info = found; return 0; } - found = kmalloc(sizeof(*found), GFP_NOFS); + found = kzalloc(sizeof(*found), GFP_NOFS); if (!found) return -ENOMEM; @@ -1807,6 +1807,7 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags, found->bytes_used = bytes_used; found->bytes_pinned = 0; found->bytes_reserved = 0; + found->bytes_readonly = 0; found->full = 0; found->force_alloc = 0; *space_info = found; @@ -1829,6 +1830,19 @@ static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags) } } +static void set_block_group_readonly(struct btrfs_block_group_cache *cache) +{ + spin_lock(&cache->space_info->lock); + spin_lock(&cache->lock); + if (!cache->ro) { + cache->space_info->bytes_readonly += cache->key.offset - + btrfs_block_group_used(&cache->item); + cache->ro = 1; + } + spin_unlock(&cache->lock); + spin_unlock(&cache->space_info->lock); +} + static u64 reduce_alloc_profile(struct btrfs_root *root, u64 flags) { u64 num_devices = root->fs_info->fs_devices->num_devices; @@ -1865,7 +1879,9 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans, u64 thresh; u64 start; u64 num_bytes; - int ret = 0, waited = 0; + int ret = 0; + + mutex_lock(&extent_root->fs_info->chunk_mutex); flags = reduce_alloc_profile(extent_root, flags); @@ -1887,46 +1903,28 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans, goto out; } - thresh = div_factor(space_info->total_bytes, 6); + thresh = space_info->total_bytes - space_info->bytes_readonly; + thresh = div_factor(thresh, 6); if (!force && (space_info->bytes_used + space_info->bytes_pinned + space_info->bytes_reserved + alloc_bytes) < thresh) { spin_unlock(&space_info->lock); goto out; } - spin_unlock(&space_info->lock); - ret = mutex_trylock(&extent_root->fs_info->chunk_mutex); - if (!ret && !force) { - goto out; - } else if (!ret) { - mutex_lock(&extent_root->fs_info->chunk_mutex); - waited = 1; - } - - if (waited) { - spin_lock(&space_info->lock); - if (space_info->full) { - spin_unlock(&space_info->lock); - goto out_unlock; - } - spin_unlock(&space_info->lock); - } - ret = btrfs_alloc_chunk(trans, extent_root, &start, &num_bytes, flags); if (ret) { printk("space info full %Lu\n", flags); space_info->full = 1; - goto out_unlock; + goto out; } ret = btrfs_make_block_group(trans, extent_root, 0, flags, BTRFS_FIRST_CHUNK_TREE_OBJECTID, start, num_bytes); BUG_ON(ret); -out_unlock: - mutex_unlock(&extent_root->fs_info->chunk_mutex); out: + mutex_unlock(&extent_root->fs_info->chunk_mutex); return ret; } @@ -1956,12 +1954,18 @@ static int update_block_group(struct btrfs_trans_handle *trans, if (alloc) { old_val += num_bytes; cache->space_info->bytes_used += num_bytes; + if (cache->ro) { + cache->space_info->bytes_readonly -= num_bytes; + WARN_ON(1); + } btrfs_set_block_group_used(&cache->item, old_val); spin_unlock(&cache->lock); spin_unlock(&cache->space_info->lock); } else { old_val -= num_bytes; cache->space_info->bytes_used -= num_bytes; + if (cache->ro) + cache->space_info->bytes_readonly += num_bytes; btrfs_set_block_group_used(&cache->item, old_val); spin_unlock(&cache->lock); spin_unlock(&cache->space_info->lock); @@ -5560,8 +5564,7 @@ int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start) BUG_ON(IS_ERR(reloc_inode)); __alloc_chunk_for_shrink(root, block_group, 1); - block_group->ro = 1; - block_group->space_info->total_bytes -= block_group->key.offset; + set_block_group_readonly(block_group); btrfs_start_delalloc_inodes(info->tree_root); btrfs_wait_ordered_extents(info->tree_root, 0); @@ -5868,6 +5871,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, block_group = btrfs_lookup_block_group(root->fs_info, group_start); BUG_ON(!block_group); + BUG_ON(!block_group->ro); memcpy(&key, &block_group->key, sizeof(key)); @@ -5881,6 +5885,11 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans, list_del(&block_group->list); up_write(&block_group->space_info->groups_sem); + spin_lock(&block_group->space_info->lock); + block_group->space_info->total_bytes -= block_group->key.offset; + block_group->space_info->bytes_readonly -= block_group->key.offset; + spin_unlock(&block_group->space_info->lock); + /* memset(shrink_block_group, 0, sizeof(*shrink_block_group)); kfree(shrink_block_group); diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 2ed2deacde9..3e3620e69bb 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1808,10 +1808,6 @@ void btrfs_orphan_cleanup(struct btrfs_root *root) struct inode *inode; int ret = 0, nr_unlink = 0, nr_truncate = 0; - /* don't do orphan cleanup if the fs is readonly. */ - if (root->fs_info->sb->s_flags & MS_RDONLY) - return; - path = btrfs_alloc_path(); if (!path) return; @@ -3050,7 +3046,7 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry, struct btrfs_root *root = bi->root; struct btrfs_root *sub_root = root; struct btrfs_key location; - int ret, new, do_orphan = 0; + int ret, new; if (dentry->d_name.len > BTRFS_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); @@ -3076,13 +3072,9 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry, if (new && root != sub_root) { igrab(inode); sub_root->inode = inode; - do_orphan = 1; } } - if (unlikely(do_orphan)) - btrfs_orphan_cleanup(sub_root); - return d_splice_alias(inode, dentry); } @@ -3237,7 +3229,7 @@ int btrfs_write_inode(struct inode *inode, int wait) struct btrfs_trans_handle *trans; int ret = 0; - if (root->fs_info->closing > 1) + if (root->fs_info->btree_inode == inode) return 0; if (wait) { @@ -4625,6 +4617,9 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root) struct inode *inode; unsigned long flags; + if (root->fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + spin_lock_irqsave(&root->fs_info->delalloc_lock, flags); while(!list_empty(head)) { binode = list_entry(head->next, struct btrfs_inode, diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 4d7cc7c504d..52863cebd59 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -378,6 +378,9 @@ static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg) int namelen; int mod = 0; + if (root->fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS); if (!vol_args) @@ -478,6 +481,9 @@ static noinline int btrfs_ioctl_snap_create(struct file *file, int namelen; int ret; + if (root->fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS); if (!vol_args) @@ -534,6 +540,11 @@ static int btrfs_ioctl_defrag(struct file *file) { struct inode *inode = fdentry(file)->d_inode; struct btrfs_root *root = BTRFS_I(inode)->root; + int ret; + + ret = mnt_want_write(file->f_path.mnt); + if (ret) + return ret; switch (inode->i_mode & S_IFMT) { case S_IFDIR: @@ -575,6 +586,9 @@ long btrfs_ioctl_rm_dev(struct btrfs_root *root, void __user *arg) struct btrfs_ioctl_vol_args *vol_args; int ret; + if (root->fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + vol_args = kmalloc(sizeof(*vol_args), GFP_NOFS); if (!vol_args) @@ -621,6 +635,10 @@ long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, u64 off, * they don't overlap)? */ + ret = mnt_want_write(file->f_path.mnt); + if (ret) + return ret; + src_file = fget(srcfd); if (!src_file) return -EBADF; @@ -958,6 +976,10 @@ long btrfs_ioctl_trans_start(struct file *file) goto out; } + ret = mnt_want_write(file->f_path.mnt); + if (ret) + goto out; + mutex_lock(&root->fs_info->trans_mutex); root->fs_info->open_ioctl_trans++; mutex_unlock(&root->fs_info->trans_mutex); diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index ab9d5e89ed1..04a3bf81650 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -370,6 +370,9 @@ int btrfs_sync_fs(struct super_block *sb, int wait) int ret; root = btrfs_sb(sb); + if (sb->s_flags & MS_RDONLY) + return 0; + sb->s_dirt = 0; if (!wait) { filemap_flush(root->fs_info->btree_inode->i_mapping); @@ -438,7 +441,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags, up_write(&s->s_umount); deactivate_super(s); error = -EBUSY; - goto error_bdev; + goto error_close_devices; } } else { @@ -487,7 +490,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags, error_s: error = PTR_ERR(s); -error_bdev: +error_close_devices: btrfs_close_devices(fs_devices); error_free_subvol_name: kfree(subvol_name); @@ -495,6 +498,35 @@ error: return error; } +static int btrfs_remount(struct super_block *sb, int *flags, char *data) +{ + struct btrfs_root *root = btrfs_sb(sb); + int ret; + + if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) + return 0; + + if (*flags & MS_RDONLY) { + sb->s_flags |= MS_RDONLY; + + ret = btrfs_commit_super(root); + WARN_ON(ret); + } else { + if (btrfs_super_log_root(&root->fs_info->super_copy) != 0) + return -EINVAL; + + ret = btrfs_cleanup_reloc_trees(root); + WARN_ON(ret); + + ret = btrfs_cleanup_fs_roots(root->fs_info); + WARN_ON(ret); + + sb->s_flags &= ~MS_RDONLY; + } + + return 0; +} + static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) { struct btrfs_root *root = btrfs_sb(dentry->d_sb); @@ -582,6 +614,7 @@ static struct super_operations btrfs_super_ops = { .alloc_inode = btrfs_alloc_inode, .destroy_inode = btrfs_destroy_inode, .statfs = btrfs_statfs, + .remount_fs = btrfs_remount, .write_super_lockfs = btrfs_write_super_lockfs, .unlockfs = btrfs_unlockfs, }; |