- It's better to show a warning message for the exceptional case
that one of highest objectid (in most case, inode number)
reaches its max value, BTRFS_LAST_FREE_OBJECTID. Show this
message only once to avoid filling dmesg with it.
- EOVERFLOW is more proper return value for this case.
ENOSPC is for "No space left on device" case and objectid isn't
related to any device.
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@xxxxxxxxxxxxxx>
---
This patch can be applied to v4.5-rc6
---
fs/btrfs/inode-map.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index e50316c..a4860fd 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -555,8 +555,10 @@ int btrfs_find_free_objectid(struct btrfs_root *root, u64 *objectid)
int ret;
mutex_lock(&root->objectid_mutex);
- if (unlikely(root->highest_objectid >= BTRFS_LAST_FREE_OBJECTID)) {
- ret = -ENOSPC;
+ if (WARN_ONCE(root->highest_objectid >= BTRFS_LAST_FREE_OBJECTID,
+ "BTRFS: The highest objectid reaches its max value %llu.\n",
+ BTRFS_LAST_FREE_OBJECTID)) {
+ ret = -EOVERFLOW;
goto out;
}
--
2.5.0
--
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