forked from pool/util-linux
62 lines
1.7 KiB
Diff
62 lines
1.7 KiB
Diff
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--- util-linux-2.12q/mount/nfs.5
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+++ util-linux-2.12q/mount/nfs.5
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@@ -199,11 +199,11 @@
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.TP 1.5i
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.I tcp
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Mount the NFS filesystem using the TCP protocol instead of the
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-default UDP protocol. Many NFS servers only support UDP.
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+UDP protocol. This is the default, but in case it fails (many NFS servers only
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+support UDP) it will fallback and try UDP.
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.TP 1.5i
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.I udp
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-Mount the NFS filesystem using the UDP protocol. This
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-is the default.
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+Mount the NFS filesystem using the UDP protocol.
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.TP 1.5i
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.I noacl
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Assume no extended access control mechanisms like POSIX ACLs are used
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@@ -227,8 +227,5 @@
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The posix, and nocto options are parsed by mount
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but currently are silently ignored.
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.P
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-The tcp and namlen options are implemented but are not currently
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-supported by the Linux kernel.
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-.P
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The umount command should notify the server
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when an NFS filesystem is unmounted.
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--- util-linux-2.12q/mount/nfsmount.c
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+++ util-linux-2.12q/mount/nfsmount.c
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@@ -319,7 +319,7 @@
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noacl = 0;
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noac = 0;
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retry = 10000; /* 10000 minutes ~ 1 week */
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- tcp = 0;
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+ tcp = 2;
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mountprog = MOUNTPROG;
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mountvers = 0;
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@@ -439,6 +439,8 @@
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}
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}
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}
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+
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+retry_udp:
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proto = (tcp) ? IPPROTO_TCP : IPPROTO_UDP;
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data.flags = (soft ? NFS_MOUNT_SOFT : 0)
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@@ -742,7 +744,13 @@
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* '0' for port (service unavailable), we then exit,
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* notifying the user, rather than hanging up mount.
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*/
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- if (port == 0 && tcp == 1) {
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+ if (port == 0 && tcp) {
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+ if (tcp == 2) {
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+ fprintf(stderr, "nfs server reported tcp not available, falling back to udp\n");
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+ close(fsock);
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+ tcp = 0;
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+ goto retry_udp;
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+ }
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perror(_("nfs server reported service unavailable"));
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goto fail;
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}
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