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Btrfs: Fix nodatacow for the new data=ordered mode

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan Zheng
2008-08-05 13:05:02 -04:00
committed by Chris Mason
parent 00e4e6b33a
commit 7ea394f119
7 changed files with 76 additions and 36 deletions
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fs/btrfs/ordered-data.c
+13 -3
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@@ -152,7 +152,7 @@ static inline struct rb_node *tree_search(struct btrfs_ordered_inode_tree *tree,
* inserted.
*/
int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
u64 start, u64 len)
u64 start, u64 len, int nocow)
{
struct btrfs_ordered_inode_tree *tree;
struct rb_node *node;
@@ -168,6 +168,8 @@ int btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
entry->start = start;
entry->len = len;
entry->inode = inode;
if (nocow)
set_bit(BTRFS_ORDERED_NOCOW, &entry->flags);
/* one ref for the tree */
atomic_set(&entry->refs, 1);
@@ -303,10 +305,11 @@ int btrfs_remove_ordered_extent(struct inode *inode,
return 0;
}
int btrfs_wait_ordered_extents(struct btrfs_root *root)
int btrfs_wait_ordered_extents(struct btrfs_root *root, int nocow_only)
{
struct list_head splice;
struct list_head *cur;
struct list_head *tmp;
struct btrfs_ordered_extent *ordered;
struct inode *inode;
@@ -314,10 +317,16 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root)
spin_lock(&root->fs_info->ordered_extent_lock);
list_splice_init(&root->fs_info->ordered_extents, &splice);
while(!list_empty(&splice)) {
list_for_each_safe(cur, tmp, &splice) {
cur = splice.next;
ordered = list_entry(cur, struct btrfs_ordered_extent,
root_extent_list);
if (nocow_only &&
!test_bit(BTRFS_ORDERED_NOCOW, &ordered->flags)) {
cond_resched_lock(&root->fs_info->ordered_extent_lock);
continue;
}
list_del_init(&ordered->root_extent_list);
atomic_inc(&ordered->refs);
inode = ordered->inode;
@@ -338,6 +347,7 @@ int btrfs_wait_ordered_extents(struct btrfs_root *root)
spin_lock(&root->fs_info->ordered_extent_lock);
}
list_splice_init(&splice, &root->fs_info->ordered_extents);
spin_unlock(&root->fs_info->ordered_extent_lock);
return 0;
}