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autofs-5.0.7 - probe each nfs version in turn for singleton mounts
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From: Ian Kent <raven@themaw.net>
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---
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CHANGELOG | 1 +
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include/replicated.h | 2 ++
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modules/mount_nfs.c | 35 ++++++++++++++++++++++++++++++++++-
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modules/replicated.c | 8 ++++----
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4 files changed, 41 insertions(+), 5 deletions(-)
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diff --git a/CHANGELOG b/CHANGELOG
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index 39d7889..48e9806 100644
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--- a/CHANGELOG
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+++ b/CHANGELOG
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@@ -48,6 +48,7 @@
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- fix master map mount options matching.
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- fix master map bogus keywork match.
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- fix fix map entry duplicate offset detection.
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+- probe each nfs version in turn for singleton mounts.
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25/07/2012 autofs-5.0.7
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=======================
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diff --git a/include/replicated.h b/include/replicated.h
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index ff0e7b9..728f131 100644
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--- a/include/replicated.h
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+++ b/include/replicated.h
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@@ -68,6 +68,8 @@ struct host {
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};
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void seed_random(void);
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+struct host *new_host(const char *, struct sockaddr *, size_t,
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+ unsigned int, unsigned int, unsigned int);
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void free_host_list(struct host **);
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int parse_location(unsigned, struct host **, const char *, unsigned int);
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int prune_host_list(unsigned, struct host **, unsigned int, int);
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diff --git a/modules/mount_nfs.c b/modules/mount_nfs.c
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index 5424d74..81ba3ca 100644
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--- a/modules/mount_nfs.c
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+++ b/modules/mount_nfs.c
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@@ -180,9 +180,42 @@ int mount_mount(struct autofs_point *ap, const char *root, const char *name, int
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* We can't probe protocol rdma so leave it to mount.nfs(8)
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* and and suffer the delay if a server isn't available.
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*/
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- if (!rdma)
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+ if (rdma)
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+ goto dont_probe;
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+
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+ /*
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+ * If this is a singleton mount, and NFSv4 only hasn't been asked
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+ * for, and the default NFS protocol is set to v4 in the autofs
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+ * configuration only probe NFSv4 and let mount.nfs(8) do fallback
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+ * to NFSv3 (if it can). If the NFSv4 probe fails then probe as
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+ * normal.
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+ */
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+ if (!hosts->next &&
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+ mount_default_proto == 4 &&
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+ vers & NFS_VERS_MASK != 0 &&
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+ vers & NFS4_VERS_MASK != 0) {
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+ unsigned int v4_probe_ok = 0;
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+ struct host *tmp = new_host(hosts->name,
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+ hosts->addr, hosts->addr_len,
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+ hosts->proximity,
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+ hosts->weight, hosts->options);
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+ if (tmp) {
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+ tmp->rr = hosts->rr;
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+ prune_host_list(ap->logopt, &tmp,
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+ NFS4_VERS_MASK|TCP_SUPPORTED, port);
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+ /* If probe succeeds just try the mount with host in hosts */
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+ if (tmp) {
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+ v4_probe_ok = 1;
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+ free_host_list(&tmp);
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+ }
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+ }
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+ if (!v4_probe_ok)
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+ prune_host_list(ap->logopt, &hosts, vers, port);
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+ } else {
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prune_host_list(ap->logopt, &hosts, vers, port);
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+ }
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+dont_probe:
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if (!hosts) {
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info(ap->logopt, MODPREFIX "no hosts available");
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return 1;
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diff --git a/modules/replicated.c b/modules/replicated.c
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index 6dbdade..0a044b9 100644
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--- a/modules/replicated.c
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+++ b/modules/replicated.c
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@@ -280,10 +280,10 @@ static unsigned int get_proximity(struct sockaddr *host_addr)
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return PROXIMITY_OTHER;
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}
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-static struct host *new_host(const char *name,
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- struct sockaddr *addr, size_t addr_len,
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- unsigned int proximity, unsigned int weight,
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- unsigned int options)
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+struct host *new_host(const char *name,
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+ struct sockaddr *addr, size_t addr_len,
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+ unsigned int proximity, unsigned int weight,
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+ unsigned int options)
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{
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struct host *new;
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struct sockaddr *tmp2;
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