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authorTrond Myklebust <Trond.Myklebust@netapp.com>2013-08-07 12:30:52 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-08-07 12:37:04 -0400
commit6da1a034362f86e157e251e65394f0b6570e3e3a (patch)
treef8fa747e0efdd4dca2c94c219c62e8265a51d76a /fs
parent9597c13b2f3c54240b1b902a677672faa70ab7c5 (diff)
downloadleg-kernel-6da1a034362f86e157e251e65394f0b6570e3e3a.tar.gz
NFSv4: Refuse mount attempts with proto=udp
RFC3530 disallows the use of udp as a transport protocol for NFSv4. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/super.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 71fdc0dfa0d2..f2071d221c77 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -2084,6 +2084,8 @@ static int nfs_validate_text_mount_data(void *options,
max_namelen = NFS4_MAXNAMLEN;
max_pathlen = NFS4_MAXPATHLEN;
nfs_validate_transport_protocol(args);
+ if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
+ goto out_invalid_transport_udp;
nfs4_validate_mount_flags(args);
#else
goto out_v4_not_compiled;
@@ -2106,6 +2108,10 @@ static int nfs_validate_text_mount_data(void *options,
out_v4_not_compiled:
dfprintk(MOUNT, "NFS: NFSv4 is not compiled into kernel\n");
return -EPROTONOSUPPORT;
+#else
+out_invalid_transport_udp:
+ dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
+ return -EINVAL;
#endif /* !CONFIG_NFS_V4 */
out_no_address:
@@ -2711,6 +2717,8 @@ static int nfs4_validate_mount_data(void *options,
args->acdirmax = data->acdirmax;
args->nfs_server.protocol = data->proto;
nfs_validate_transport_protocol(args);
+ if (args->nfs_server.protocol == XPRT_TRANSPORT_UDP)
+ goto out_invalid_transport_udp;
break;
default:
@@ -2731,6 +2739,10 @@ out_inval_auth:
out_no_address:
dfprintk(MOUNT, "NFS4: mount program didn't pass remote address\n");
return -EINVAL;
+
+out_invalid_transport_udp:
+ dfprintk(MOUNT, "NFSv4: Unsupported transport protocol udp\n");
+ return -EINVAL;
}
/*