mount.nfs: support netids in v2/v3 version/transport negotiation

When rewriting mount options during v2/v3 negotiation, restore the
correct netids, rather than protocol names, in the rewritten protocol
options.  If TI-RPC is not available, the traditional behavior is
preserved.

This patch assumes the kernel can recognize a netid, instead of a
protocol name, as the value of the proto= options.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>

diff --git a/utils/mount/stropts.c b/utils/mount/stropts.c
index 4007150103867590bee8c858b549d8a4a20ebd29..008fdbc7c9846f41100b3921ea657cad53adb3a0 100644 (file)
--- a/utils/mount/stropts.c
+++ b/utils/mount/stropts.c
@@ -38,6 +38,7 @@
 #include "xcommon.h"
 #include "mount.h"
 #include "nls.h"
+#include "nfsrpc.h"
 #include "mount_constants.h"
 #include "stropts.h"
 #include "error.h"
@@ -371,10 +372,13 @@ static int nfs_extract_server_addresses(struct mount_options *options,
 }
 
 static int nfs_construct_new_options(struct mount_options *options,
+                                    struct sockaddr *nfs_saddr,
                                     struct pmap *nfs_pmap,
+                                    struct sockaddr *mnt_saddr,
                                     struct pmap *mnt_pmap)
 {
        char new_option[64];
+       char *netid;
 
        po_remove_all(options, "nfsprog");
        po_remove_all(options, "mountprog");
@@ -391,20 +395,14 @@ static int nfs_construct_new_options(struct mount_options *options,
        po_remove_all(options, "proto");
        po_remove_all(options, "udp");
        po_remove_all(options, "tcp");
-       switch (nfs_pmap->pm_prot) {
-       case IPPROTO_TCP:
-               snprintf(new_option, sizeof(new_option) - 1,
-                        "proto=tcp");
-               if (po_append(options, new_option) == PO_FAILED)
-                       return 0;
-               break;
-       case IPPROTO_UDP:
-               snprintf(new_option, sizeof(new_option) - 1,
-                        "proto=udp");
-               if (po_append(options, new_option) == PO_FAILED)
-                       return 0;
-               break;
-       }
+       netid = nfs_get_netid(nfs_saddr->sa_family, nfs_pmap->pm_prot);
+       if (netid == NULL)
+               return 0;
+       snprintf(new_option, sizeof(new_option) - 1,
+                        "proto=%s", netid);
+       free(netid);
+       if (po_append(options, new_option) == PO_FAILED)
+               return 0;
 
        po_remove_all(options, "port");
        if (nfs_pmap->pm_port != NFS_PORT) {
@@ -421,20 +419,14 @@ static int nfs_construct_new_options(struct mount_options *options,
                return 0;
 
        po_remove_all(options, "mountproto");
-       switch (mnt_pmap->pm_prot) {
-       case IPPROTO_TCP:
-               snprintf(new_option, sizeof(new_option) - 1,
-                        "mountproto=tcp");
-               if (po_append(options, new_option) == PO_FAILED)
-                       return 0;
-               break;
-       case IPPROTO_UDP:
-               snprintf(new_option, sizeof(new_option) - 1,
-                        "mountproto=udp");
-               if (po_append(options, new_option) == PO_FAILED)
-                       return 0;
-               break;
-       }
+       netid = nfs_get_netid(mnt_saddr->sa_family, mnt_pmap->pm_prot);
+       if (netid == NULL)
+               return 0;
+       snprintf(new_option, sizeof(new_option) - 1,
+                        "mountproto=%s", netid);
+       free(netid);
+       if (po_append(options, new_option) == PO_FAILED)
+               return 0;
 
        po_remove_all(options, "mountport");
        snprintf(new_option, sizeof(new_option) - 1,
@@ -510,7 +502,8 @@ nfs_rewrite_pmap_mount_options(struct mount_options *options)
                return 0;
        }
 
-       if (!nfs_construct_new_options(options, &nfs_pmap, &mnt_pmap)) {
+       if (!nfs_construct_new_options(options, nfs_saddr, &nfs_pmap,
+                                       mnt_saddr, &mnt_pmap)) {
                errno = EINVAL;
                return 0;
        }