From: David Howells dhowells@redhat.com
stable inclusion from stable-v6.6.4 commit 18350d280999cbde37fcac4f55117fbb40972715 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8N1WC
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 2a4ca1b4b77850544408595e2433f5d7811a9daa ]
When kafs tries to look up a cell in the DNS or the local config, it will translate a lookup failure into EDESTADDRREQ whereas OpenAFS translates it into ENOENT. Applications such as West expect the latter behaviour and fail if they see the former.
This can be seen by trying to mount an unknown cell:
# mount -t afs %example.com:cell.root /mnt mount: /mnt: mount(2) system call failed: Destination address required.
Fixes: 4d673da14533 ("afs: Support the AFS dynamic root") Reported-by: Markus Suvanto markus.suvanto@gmail.com Link: https://bugzilla.kernel.org/show_bug.cgi?id=216637 Signed-off-by: David Howells dhowells@redhat.com Reviewed-by: Jeffrey Altman jaltman@auristor.com cc: Marc Dionne marc.dionne@auristor.com cc: linux-afs@lists.infradead.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- fs/afs/dynroot.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c index 95bcbd7654d1..8081d68004d0 100644 --- a/fs/afs/dynroot.c +++ b/fs/afs/dynroot.c @@ -132,8 +132,8 @@ static int afs_probe_cell_name(struct dentry *dentry)
ret = dns_query(net->net, "afsdb", name, len, "srv=1", NULL, NULL, false); - if (ret == -ENODATA) - ret = -EDESTADDRREQ; + if (ret == -ENODATA || ret == -ENOKEY) + ret = -ENOENT; return ret; }