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Btrfs: introduce per-subvolume delalloc inode list

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When we create a snapshot, we need flush all delalloc inodes in the
fs, just flushing the inodes in the source tree is OK. So we introduce
per-subvolume delalloc inode list.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
This commit is contained in:
Miao Xie
2013-05-15 07:48:22 +00:00
committed by Josef Bacik
parent b0feb9d96e
commit eb73c1b7ce
7 changed files with 183 additions and 67 deletions
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49
fs/btrfs/disk-io.c
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@@ -1191,6 +1191,7 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
root->objectid = objectid;
root->last_trans = 0;
root->highest_objectid = 0;
root->nr_delalloc_inodes = 0;
root->name = NULL;
root->inode_tree = RB_ROOT;
INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC);
@@ -1199,10 +1200,13 @@ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
INIT_LIST_HEAD(&root->dirty_list);
INIT_LIST_HEAD(&root->root_list);
INIT_LIST_HEAD(&root->delalloc_inodes);
INIT_LIST_HEAD(&root->delalloc_root);
INIT_LIST_HEAD(&root->logged_list[0]);
INIT_LIST_HEAD(&root->logged_list[1]);
spin_lock_init(&root->orphan_lock);
spin_lock_init(&root->inode_lock);
spin_lock_init(&root->delalloc_lock);
spin_lock_init(&root->accounting_lock);
spin_lock_init(&root->log_extents_lock[0]);
spin_lock_init(&root->log_extents_lock[1]);
@@ -2140,9 +2144,9 @@ int open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->trans_list);
INIT_LIST_HEAD(&fs_info->dead_roots);
INIT_LIST_HEAD(&fs_info->delayed_iputs);
INIT_LIST_HEAD(&fs_info->delalloc_inodes);
INIT_LIST_HEAD(&fs_info->delalloc_roots);
INIT_LIST_HEAD(&fs_info->caching_block_groups);
spin_lock_init(&fs_info->delalloc_lock);
spin_lock_init(&fs_info->delalloc_root_lock);
spin_lock_init(&fs_info->trans_lock);
spin_lock_init(&fs_info->fs_roots_radix_lock);
spin_lock_init(&fs_info->delayed_iput_lock);
@@ -3803,24 +3807,49 @@ static void btrfs_destroy_delalloc_inodes(struct btrfs_root *root)
INIT_LIST_HEAD(&splice);
spin_lock(&root->fs_info->delalloc_lock);
list_splice_init(&root->fs_info->delalloc_inodes, &splice);
spin_lock(&root->delalloc_lock);
list_splice_init(&root->delalloc_inodes, &splice);
while (!list_empty(&splice)) {
btrfs_inode = list_entry(splice.next, struct btrfs_inode,
delalloc_inodes);
btrfs_inode = list_first_entry(&splice, struct btrfs_inode,
delalloc_inodes);
list_del_init(&btrfs_inode->delalloc_inodes);
clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
&btrfs_inode->runtime_flags);
spin_unlock(&root->fs_info->delalloc_lock);
spin_unlock(&root->delalloc_lock);
btrfs_invalidate_inodes(btrfs_inode->root);
spin_lock(&root->fs_info->delalloc_lock);
spin_lock(&root->delalloc_lock);
}
spin_unlock(&root->fs_info->delalloc_lock);
spin_unlock(&root->delalloc_lock);
}
static void btrfs_destroy_all_delalloc_inodes(struct btrfs_fs_info *fs_info)
{
struct btrfs_root *root;
struct list_head splice;
INIT_LIST_HEAD(&splice);
spin_lock(&fs_info->delalloc_root_lock);
list_splice_init(&fs_info->delalloc_roots, &splice);
while (!list_empty(&splice)) {
root = list_first_entry(&splice, struct btrfs_root,
delalloc_root);
list_del_init(&root->delalloc_root);
root = btrfs_grab_fs_root(root);
BUG_ON(!root);
spin_unlock(&fs_info->delalloc_root_lock);
btrfs_destroy_delalloc_inodes(root);
btrfs_put_fs_root(root);
spin_lock(&fs_info->delalloc_root_lock);
}
spin_unlock(&fs_info->delalloc_root_lock);
}
static int btrfs_destroy_marked_extents(struct btrfs_root *root,
@@ -3974,7 +4003,7 @@ static int btrfs_cleanup_transaction(struct btrfs_root *root)
btrfs_destroy_delayed_inodes(root);
btrfs_assert_delayed_root_empty(root);
btrfs_destroy_delalloc_inodes(root);
btrfs_destroy_all_delalloc_inodes(root->fs_info);
spin_lock(&root->fs_info->trans_lock);
root->fs_info->running_transaction = NULL;