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authorYan Zheng <zheng.yan@oracle.com>2008-10-30 14:20:02 -0400
committerChris Mason <chris.mason@oracle.com>2008-10-30 14:20:02 -0400
commit80ff385665b7fca29fefe358a60ab0d09f9b8e87 (patch)
tree8a801d3f268d289b62f8dac87df8b757fb3b19d4 /fs/btrfs/ioctl.c
parent6643558db29006825dbb10012b3f8890aca4bcd5 (diff)
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Btrfs: update nodatacow code v2
This patch simplifies the nodatacow checker. If all references were created after the latest snapshot, then we can avoid COW safely. This patch also updates run_delalloc_nocow to do more fine-grained checking. Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Diffstat (limited to 'fs/btrfs/ioctl.c')
-rw-r--r--fs/btrfs/ioctl.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index fd3c8b5676c..7f915d47839 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -112,6 +112,7 @@ static noinline int create_subvol(struct btrfs_root *root,
btrfs_set_root_level(&root_item, 0);
btrfs_set_root_refs(&root_item, 1);
btrfs_set_root_used(&root_item, 0);
+ btrfs_set_root_last_snapshot(&root_item, 0);
memset(&root_item.drop_progress, 0, sizeof(root_item.drop_progress));
root_item.drop_level = 0;