diff options
| -rw-r--r-- | sbin/umount/umount.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/sbin/umount/umount.c b/sbin/umount/umount.c index 521bbc8..ccd15f5 100644 --- a/sbin/umount/umount.c +++ b/sbin/umount/umount.c @@ -49,6 +49,7 @@ static const char rcsid[] = #include <netdb.h> #include <rpc/rpc.h> #include <rpcsvc/mount.h> +#include <nfs/nfssvc.h> #include <ctype.h> #include <err.h> @@ -317,6 +318,9 @@ umountfs(struct statfs *sfs) CLIENT *clp; char *nfsdirname, *orignfsdirname; char *hostp, *delimp; + char buf[1024]; + struct nfscl_dumpmntopts dumpmntopts; + const char *proto_ptr = NULL; ai = NULL; do_rpc = 0; @@ -355,8 +359,24 @@ umountfs(struct statfs *sfs) * mount from mntfromname that is still mounted. */ if (getmntentry(sfs->f_mntfromname, NULL, NULL, - CHECKUNIQUE) != NULL) + CHECKUNIQUE) != NULL) { do_rpc = 1; + proto_ptr = "udp"; + /* + * Try and find out whether this NFS mount is NFSv4 and + * what protocol is being used. If this fails, the + * default is NFSv2,3 and use UDP for the Unmount RPC. + */ + dumpmntopts.ndmnt_fname = sfs->f_mntonname; + dumpmntopts.ndmnt_buf = buf; + dumpmntopts.ndmnt_blen = sizeof(buf); + if (nfssvc(NFSSVC_DUMPMNTOPTS, &dumpmntopts) >= 0) { + if (strstr(buf, "nfsv4,") != NULL) + do_rpc = 0; + else if (strstr(buf, ",tcp,") != NULL) + proto_ptr = "tcp"; + } + } } if (!namematch(ai)) { @@ -394,7 +414,7 @@ umountfs(struct statfs *sfs) * has been unmounted. */ if (ai != NULL && !(fflag & MNT_FORCE) && do_rpc) { - clp = clnt_create(hostp, MOUNTPROG, MOUNTVERS3, "udp"); + clp = clnt_create(hostp, MOUNTPROG, MOUNTVERS3, proto_ptr); if (clp == NULL) { warnx("%s: %s", hostp, clnt_spcreateerror("MOUNTPROG")); |
