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| author | Amir Goldstein <amir73il@gmail.com> | 2026-03-08 12:02:21 +0100 |
|---|---|---|
| committer | Amir Goldstein <amir73il@gmail.com> | 2026-03-24 16:17:26 +0100 |
| commit | 53a7c171e9dd833f0a96b545adcb89bd57387239 (patch) | |
| tree | 94941aa5ce520be32f42f7c1190f678fd3e0d6e3 | |
| parent | f338e77383789c0cae23ca3d48adcc5e9e137e3c (diff) | |
ovl: fix wrong detection of 32bit inode numbers
The implicit FILEID_INO32_GEN encoder was changed to be explicit,
so we need to fix the detection.
When mounting overlayfs with upperdir and lowerdir on different ext4
filesystems, the expected kmsg log is:
overlayfs: "xino" feature enabled using 32 upper inode bits.
But instead, since the regressing commit, the kmsg log was:
overlayfs: "xino" feature enabled using 2 upper inode bits.
Fixes: e21fc2038c1b9 ("exportfs: make ->encode_fh() a mandatory method for NFS export")
Cc: stable@vger.kernel.org # v6.7+
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
| -rw-r--r-- | fs/overlayfs/util.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index 3f1b763a8bb4..2ea769f311c3 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -85,7 +85,10 @@ int ovl_can_decode_fh(struct super_block *sb) if (!exportfs_can_decode_fh(sb->s_export_op)) return 0; - return sb->s_export_op->encode_fh ? -1 : FILEID_INO32_GEN; + if (sb->s_export_op->encode_fh == generic_encode_ino32_fh) + return FILEID_INO32_GEN; + + return -1; } struct dentry *ovl_indexdir(struct super_block *sb) |