When rpc.gssd is not running, any NFS operation that needs to use a
GSS security flavor of course does not work.
If looking up a server's root file handle results in an
NFS4ERR_WRONGSEC, nfs4_find_root_sec() is called to try a bunch of
security flavors until one works or all reasonable flavors have
been tried. When rpc.gssd isn't running, this loop seems to fail
immediately after rpcauth_create() craps out on the first GSS
flavor.
When the rpcauth_create() call in nfs4_lookup_root_sec() fails
because rpc.gssd is not available, nfs4_lookup_root_sec()
unconditionally returns -EIO. This prevents nfs4_find_root_sec()
from retrying any other flavors; it drops out of its loop and fails
immediately.
Having nfs4_lookup_root_sec() return -EACCES instead allows
nfs4_find_root_sec() to try all flavors in its list.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Cc: Bryan Schumaker <bjschuma@xxxxxxxxxx>
---
fs/nfs/nfs4proc.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index b2671cb..c05e78b 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2443,7 +2443,7 @@ static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandl
auth = rpcauth_create(flavor, server->client);
if (IS_ERR(auth)) {
- ret = -EIO;
+ ret = -EACCES;
goto out;
}
ret = nfs4_lookup_root(server, fhandle, info);
--
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