On Fri, Mar 4, 2016 at 2:37 AM, Satoru Takeuchi
<takeuchi_sat...@jp.fujitsu.com> wrote:
> - 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_sat...@jp.fujitsu.com>
> ---
> 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)) {
Please, use btrfs_warn() to print messages... It avoids hardcoding
prefixes and having to copy the style of the
btrfs_[info|warn|error|...) functions.
Also include the id of the tree (root->root_key.objectid), it's much
more useful than printing root->highes_objectid....
Also add the prefix "Btrfs: " to the subject.
> + ret = -EOVERFLOW;
> goto out;
> }
>
> --
> 2.5.0
> --
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Unreasonable men adapt the world to themselves.
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