[ Sasha's backport helper bot ]
Hi,
The upstream commit SHA1 provided is correct: 550f7ca98ee028a606aa75705a7e77b1bd11720f
WARNING: Author mismatch between patch and upstream commit:
Backport author: Ilya Dryomov<idryomov@xxxxxxxxx>
Commit author: Max Kellermann<max.kellermann@xxxxxxxxx>
Status in newer kernel trees:
6.12.y | Present (different SHA1: 99a37ab76a31)
6.6.y | Present (different SHA1: 82dfe5074a06)
6.1.y | Not found
Note: The patch differs from the upstream commit:
---
1: 550f7ca98ee0 ! 1: 9c81f6f042e7 ceph: give up on paths longer than PATH_MAX
@@ Metadata
## Commit message ##
ceph: give up on paths longer than PATH_MAX
+ commit 550f7ca98ee028a606aa75705a7e77b1bd11720f upstream.
+
If the full path to be built by ceph_mdsc_build_path() happens to be
longer than PATH_MAX, then this function will enter an endless (retry)
loop, effectively blocking the whole task. Most of the machine
@@ Commit message
Signed-off-by: Max Kellermann <max.kellermann@xxxxxxxxx>
Reviewed-by: Alex Markuze <amarkuze@xxxxxxxxxx>
Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
+ [idryomov@xxxxxxxxx: backport to 6.1: pr_warn() is still in use]
## fs/ceph/mds_client.c ##
-@@ fs/ceph/mds_client.c: char *ceph_mdsc_build_path(struct ceph_mds_client *mdsc, struct dentry *dentry,
+@@ fs/ceph/mds_client.c: char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *pbase,
if (pos < 0) {
/*
@@ fs/ceph/mds_client.c: char *ceph_mdsc_build_path(struct ceph_mds_client *mdsc, s
+ * cannot ever succeed. Creating paths that long is
+ * possible with Ceph, but Linux cannot use them.
*/
-- pr_warn_client(cl, "did not end path lookup where expected (pos = %d)\n",
-- pos);
+- pr_warn("build_path did not end path lookup where "
+- "expected, pos is %d\n", pos);
- goto retry;
+ return ERR_PTR(-ENAMETOOLONG);
}
---
Results of testing on various branches:
| Branch | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.1.y | Success | Failed |
| stable/linux-5.10.y | Success | Success |
Build Errors:
Build error for stable/linux-6.1.y:
bash: line 1: cd: /home/sasha/build/linus-next: No such file or directory
