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autofs-5.1.2 - check NFS server availability on local mount fallback
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From: Ian Kent <raven@themaw.net>
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The availability probe isn't done for anything autofs thinks is a
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local mount because it's the local machine.
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It first tries a bind mount and if that fails it falls back to trying
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a local NFS mount. If the local NFS server is not running mount.nfs(8)
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can suffer a lengthy timeout.
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So check for the bind mount fallback case and check if an NFS server
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is responding before trying the mount.
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Signed-off-by: Ian Kent <raven@themaw.net>
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---
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CHANGELOG | 1 +
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lib/rpc_subs.c | 11 +++++++++++
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modules/mount_nfs.c | 15 ++++++++++++++-
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3 files changed, 26 insertions(+), 1 deletion(-)
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--- autofs-5.0.7.orig/CHANGELOG
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+++ autofs-5.0.7/CHANGELOG
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@@ -215,6 +215,7 @@
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- make lookup_nss_read_master() return nss status.
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- make set_direct_mount_catatonic() more general.
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- set autofs mounts catatonic at exit.
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+- check NFS server availability on local mount fallback.
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25/07/2012 autofs-5.0.7
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=======================
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--- autofs-5.0.7.orig/lib/rpc_subs.c
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+++ autofs-5.0.7/lib/rpc_subs.c
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@@ -1053,6 +1053,7 @@ static int __rpc_ping(const char *host,
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int rpc_ping(const char *host, long seconds, long micros, unsigned int option)
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{
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+ unsigned long vers4 = NFS4_VERSION;
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unsigned long vers3 = NFS3_VERSION;
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unsigned long vers2 = NFS2_VERSION;
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int status;
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@@ -1065,6 +1066,12 @@ int rpc_ping(const char *host, long seco
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if (status > 0)
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return RPC_PING_V3 | RPC_PING_UDP;
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+ /* UDP isn't recommended for NFSv4, don't bother checking it.
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+ status = __rpc_ping(host, vers4, IPPROTO_UDP, seconds, micros, option);
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+ if (status > 0)
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+ return RPC_PING_V4 | RPC_PING_UDP;
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+ */
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+
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status = __rpc_ping(host, vers2, IPPROTO_TCP, seconds, micros, option);
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if (status > 0)
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return RPC_PING_V2 | RPC_PING_TCP;
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@@ -1073,6 +1080,10 @@ int rpc_ping(const char *host, long seco
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if (status > 0)
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return RPC_PING_V3 | RPC_PING_TCP;
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+ status = __rpc_ping(host, vers4, IPPROTO_TCP, seconds, micros, option);
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+ if (status > 0)
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+ return RPC_PING_V4 | RPC_PING_TCP;
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+
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return status;
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}
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--- autofs-5.0.7.orig/modules/mount_nfs.c
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+++ autofs-5.0.7/modules/mount_nfs.c
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@@ -347,6 +347,19 @@ dont_probe:
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strcat(loc, ":");
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strcat(loc, this->path);
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+ /* If this is a fallback from a bind mount failure
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+ * check if the local NFS server is available to try
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+ * and prevent lengthy mount failure waits.
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+ */
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+ if (this->proximity == PROXIMITY_LOCAL) {
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+ char *host = this->name ? this->name : "localhost";
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+ int ret;
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+
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+ ret = rpc_ping(host, 2, 0, RPC_CLOSE_DEFAULT);
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+ if (ret <= 0)
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+ goto next;
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+ }
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+
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if (nfsoptions && *nfsoptions) {
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debug(ap->logopt,
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MODPREFIX "calling mount -t %s " SLOPPY
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@@ -369,7 +382,7 @@ dont_probe:
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free_host_list(&hosts);
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return 0;
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}
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-
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+next:
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free(loc);
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this = this->next;
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}
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