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authorJosef Bacik <josef@toxicpanda.com>2019-04-26 16:25:50 +0200
committerDavid Sterba <dsterba@suse.com>2019-05-09 11:18:14 +0200
commitd7400ee1b476f201f8fb4264887d18bdb23ee352 (patch)
treee87f2944f5a9a57a106bb80af6c4667877008257 /fs/btrfs
parent8fca955057b9c58467d1b231e43f19c4cf26ae8c (diff)
downloadlinux-d7400ee1b476f201f8fb4264887d18bdb23ee352.tar.bz2
btrfs: use the existing reserved items for our first prop for inheritance
We're now reserving an extra items worth of space for property inheritance. We only have one property at the moment so this covers us, but if we add more in the future this will allow us to not get bitten by the extra space reservation. If we do add more properties in the future we should re-visit how we calculate the space reservation needs by the callers. Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> [ refreshed on top of prop/xattr cleanups ] Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/props.c30
1 files changed, 22 insertions, 8 deletions
diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c
index ca2716917e37..a9e2e66152ee 100644
--- a/fs/btrfs/props.c
+++ b/fs/btrfs/props.c
@@ -332,6 +332,7 @@ static int inherit_props(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info = root->fs_info;
int ret;
int i;
+ bool need_reserve = false;
if (!test_bit(BTRFS_INODE_HAS_PROPS,
&BTRFS_I(parent)->runtime_flags))
@@ -357,11 +358,20 @@ static int inherit_props(struct btrfs_trans_handle *trans,
if (ret)
continue;
- num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1);
- ret = btrfs_block_rsv_add(root, trans->block_rsv,
- num_bytes, BTRFS_RESERVE_NO_FLUSH);
- if (ret)
- return ret;
+ /*
+ * Currently callers should be reserving 1 item for properties,
+ * since we only have 1 property that we currently support. If
+ * we add more in the future we need to try and reserve more
+ * space for them. But we should also revisit how we do space
+ * reservations if we do add more properties in the future.
+ */
+ if (need_reserve) {
+ num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1);
+ ret = btrfs_block_rsv_add(root, trans->block_rsv,
+ num_bytes, BTRFS_RESERVE_NO_FLUSH);
+ if (ret)
+ return ret;
+ }
ret = btrfs_setxattr(trans, inode, h->xattr_name, value,
strlen(value), 0);
@@ -375,9 +385,13 @@ static int inherit_props(struct btrfs_trans_handle *trans,
&BTRFS_I(inode)->runtime_flags);
}
- btrfs_block_rsv_release(fs_info, trans->block_rsv, num_bytes);
- if (ret)
- return ret;
+ if (need_reserve) {
+ btrfs_block_rsv_release(fs_info, trans->block_rsv,
+ num_bytes);
+ if (ret)
+ return ret;
+ }
+ need_reserve = true;
}
return 0;