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| author | Vivek Goyal <vgoyal@redhat.com> | 2016-07-01 10:02:44 -0400 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2016-07-03 09:39:31 +0200 |
| commit | e7c0b5991dd1be7b6f6dc2b54a15a0f47b64b007 (patch) | |
| tree | e980523614efa528bce39c26a1ceacc90cd3e0b9 | |
| parent | 03bea60409328de54e4ff7ec41672e12a9cb0908 (diff) | |
| download | linux-e7c0b5991dd1be7b6f6dc2b54a15a0f47b64b007.tar.gz linux-e7c0b5991dd1be7b6f6dc2b54a15a0f47b64b007.tar.bz2 linux-e7c0b5991dd1be7b6f6dc2b54a15a0f47b64b007.zip | |
ovl: warn instead of error if d_type is not supported
overlay needs underlying fs to support d_type. Recently I put in a
patch in to detect this condition and started failing mount if
underlying fs did not support d_type.
But this breaks existing configurations over kernel upgrade. Those who
are running docker (partially broken configuration) with xfs not
supporting d_type, are surprised that after kernel upgrade docker does
not run anymore.
https://github.com/docker/docker/issues/22937#issuecomment-229881315
So instead of erroring out, detect broken configuration and warn
about it. This should allow existing docker setups to continue
working after kernel upgrade.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 45aebeaf4f67 ("ovl: Ensure upper filesystem supports d_type")
Cc: <stable@vger.kernel.org> 4.6
| -rw-r--r-- | fs/overlayfs/super.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index ce02f46029da..9a7693d5f8ff 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -1082,11 +1082,13 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) if (err < 0) goto out_put_workdir; - if (!err) { - pr_err("overlayfs: upper fs needs to support d_type.\n"); - err = -EINVAL; - goto out_put_workdir; - } + /* + * We allowed this configuration and don't want to + * break users over kernel upgrade. So warn instead + * of erroring out. + */ + if (!err) + pr_warn("overlayfs: upper fs needs to support d_type.\n"); } } |