nfsd4: name->id mapping should fail with BADOWNER not BADNAME

According to rfc 3530 BADNAME is for strings that represent paths;
BADOWNER is for user/group names that don't map.

And the too-long name should probably be BADOWNER as well; it's
effectively the same as if we couldn't map it.

Cc: stable@kernel.org
Reported-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Reported-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

3 files changed, 4 insertions, 3 deletions

diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index f0695e815f0e..844960fd0395 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -524,13 +524,13 @@ idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen
         int ret;
 
         if (namelen + 1 > sizeof(key.name))
-                return -EINVAL;
+                return -ESRCH; /* nfserr_badowner */
         memcpy(key.name, name, namelen);
         key.name[namelen] = '\0';
         strlcpy(key.authname, rqst_authname(rqstp), sizeof(key.authname));
         ret = idmap_lookup(rqstp, nametoid_lookup, &key, &nametoid_cache, &item);
         if (ret == -ENOENT)
-                ret = -ESRCH; /* nfserr_badname */
+                ret = -ESRCH; /* nfserr_badowner */
         if (ret)
                 return ret;
         *id = item->id;
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 6b641cf2c19a..7ecfa2420307 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -158,6 +158,7 @@ void		nfsd_lockd_shutdown(void);
 #define nfserr_attrnotsupp      cpu_to_be32(NFSERR_ATTRNOTSUPP)
 #define nfserr_bad_xdr          cpu_to_be32(NFSERR_BAD_XDR)
 #define nfserr_openmode         cpu_to_be32(NFSERR_OPENMODE)
+#define nfserr_badowner         cpu_to_be32(NFSERR_BADOWNER)
 #define nfserr_locks_held       cpu_to_be32(NFSERR_LOCKS_HELD)
 #define nfserr_op_illegal       cpu_to_be32(NFSERR_OP_ILLEGAL)
 #define nfserr_grace            cpu_to_be32(NFSERR_GRACE)
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index fd608a27a8d5..8f05dcd0bf85 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -738,7 +738,7 @@ nfserrno (int errno)
                 { nfserr_jukebox, -EAGAIN },
                 { nfserr_jukebox, -EWOULDBLOCK },
                 { nfserr_jukebox, -ENOMEM },
-                { nfserr_badname, -ESRCH },
+                { nfserr_badowner, -ESRCH },
                 { nfserr_io, -ETXTBSY },
                 { nfserr_notsupp, -EOPNOTSUPP },
                 { nfserr_toosmall, -ETOOSMALL },