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autofs/autofs-5.1.7-refactor-get_nfs_info.patch
Ian Kent f6d5c04b79 autofs is slow to mount when doing lookups returns multiple entries 
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2084108

autofs can take 5 seconds or more to automount file systems in some
cases. This is caused by the server probe logic attempting to connect
to a server when it isn't available.

Attempting to fix this problem introduced a regression where rpcbind
was being consulted in a case where it shouldn't have been.

This MR resolves these problems.

Note that for NFSv4 mounts, if rpcbind is to be avoided then fallback
to NFSv3 must be disabled. This has historically been done by using
the "fstype=nfs4" automount option to requiest a specific nfs version.

Resolves: rhbz#2084108

Signed-off-by: Ian Kent ikent@redhat.com
2022-05-18 09:52:43 +08:00

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autofs-5.1.7 - refactor get_nfs_info()
From: Ian Kent <raven@themaw.net>
Make getting a portmap client and getting a service port from portmap
helper functions and simplify the return handling.
Signed-off-by: Ian Kent <raven@themaw.net>
---
CHANGELOG | 1
modules/replicated.c | 135 ++++++++++++++++++++++++++++-----------------------
2 files changed, 76 insertions(+), 60 deletions(-)
--- autofs-5.1.7.orig/CHANGELOG
+++ autofs-5.1.7/CHANGELOG
@@ -97,6 +97,7 @@
- remove nonstrict parameter from tree_mapent_umount_offsets().
- fix handling of incorrect return from umount_ent().
- make NFS version check flags consistent.
+- refactor get_nfs_info().
25/01/2021 autofs-5.1.7
- make bind mounts propagation slave by default.
--- autofs-5.1.7.orig/modules/replicated.c
+++ autofs-5.1.7/modules/replicated.c
@@ -223,6 +223,49 @@ void free_host_list(struct host **list)
*list = NULL;
}
+static unsigned int get_portmap_client(unsigned logopt,
+ struct conn_info *pm_info, struct host *host,
+ int proto)
+{
+ unsigned int status;
+
+ /* On success client is stored in pm_info->client */
+ status = rpc_portmap_getclient(pm_info,
+ host->name, host->addr, host->addr_len,
+ proto, RPC_CLOSE_DEFAULT);
+ if (status == -EHOSTUNREACH)
+ debug(logopt,
+ "host not reachable getting portmap client");
+ else if (status)
+ debug(logopt, "error 0x%d getting portmap client");
+
+ return status;
+}
+
+static unsigned int get_portmap_port(unsigned logopt,
+ struct conn_info *pm_info, struct pmap *parms,
+ unsigned long vers, unsigned int version,
+ short unsigned int *port)
+{
+ unsigned int status;
+ short unsigned int nfs_port;
+
+ parms->pm_vers = vers;
+ status = rpc_portmap_getport(pm_info, parms, &nfs_port);
+ if (status == -EHOSTUNREACH || status == -ETIMEDOUT) {
+ debug(logopt,
+ "host not reachable or timed out getting service port");
+ } else if (status < 0) {
+ if (!(version & NFS_VERS_MASK))
+ debug(logopt, "error 0x%d getting service port");
+ }
+
+ if (!status)
+ *port = nfs_port;
+
+ return status;
+}
+
static unsigned int get_nfs_info(unsigned logopt, struct host *host,
struct conn_info *pm_info, struct conn_info *rpc_info,
int proto, unsigned int version, int port)
@@ -263,33 +306,20 @@ static unsigned int get_nfs_info(unsigne
goto v3_ver;
if (!port) {
- status = rpc_portmap_getclient(pm_info,
- host->name, host->addr, host->addr_len,
- proto, RPC_CLOSE_DEFAULT);
- if (status == -EHOSTUNREACH) {
- debug(logopt,
- "host not reachable getting portmap client");
- supported = status;
- goto done_ver;
- } else if (status) {
- debug(logopt, "error 0x%d getting portmap client");
+ status = get_portmap_client(logopt, pm_info, host, proto);
+ if (status) {
+ if (status == -EHOSTUNREACH)
+ supported = status;
goto done_ver;
}
- parms.pm_vers = NFS4_VERSION;
- status = rpc_portmap_getport(pm_info, &parms, &rpc_info->port);
- if (status == -EHOSTUNREACH || status == -ETIMEDOUT) {
- debug(logopt,
- "host not reachable or timed out getting service port");
- supported = status;
- goto done_ver;
- } else if (status < 0) {
- if (version & NFS_VERS_MASK)
+ status = get_portmap_port(logopt, pm_info, &parms,
+ NFS4_VERSION, version, &rpc_info->port);
+ if (status) {
+ if (status == -EHOSTUNREACH || status == -ETIMEDOUT)
+ supported = status;
+ if (status < 0 && version & NFS_VERS_MASK)
goto v3_ver; /* MOUNT_NFS_DEFAULT_PROTOCOL=4 */
- else {
- debug(logopt,
- "error 0x%d getting service port");
- goto done_ver;
- }
+ goto done_ver;
}
}
@@ -334,31 +364,22 @@ v3_ver:
goto v2_ver;
if (!port && !pm_info->client) {
- status = rpc_portmap_getclient(pm_info,
- host->name, host->addr, host->addr_len,
- proto, RPC_CLOSE_DEFAULT);
- if (status == -EHOSTUNREACH) {
- debug(logopt,
- "host not reachable getting portmap client");
- supported = status;
- goto done_ver;
- } else if (status) {
- debug(logopt,
- "error 0x%d getting getting portmap client");
+ status = get_portmap_client(logopt, pm_info, host, proto);
+ if (status) {
+ if (status == -EHOSTUNREACH)
+ supported = status;
goto done_ver;
}
}
if (!port) {
- parms.pm_vers = NFS3_VERSION;
- status = rpc_portmap_getport(pm_info, &parms, &rpc_info->port);
- if (status == -EHOSTUNREACH || status == -ETIMEDOUT) {
- debug(logopt,
- "host not reachable or timed out getting service port");
- supported = status;
+ status = get_portmap_port(logopt, pm_info, &parms,
+ NFS3_VERSION, version, &rpc_info->port);
+ if (status) {
+ if (status == -EHOSTUNREACH || status == -ETIMEDOUT)
+ supported = status;
goto done_ver;
- } else if (status < 0)
- goto v2_ver;
+ }
}
if (rpc_info->proto == IPPROTO_UDP)
@@ -399,28 +420,22 @@ v2_ver:
goto done_ver;
if (!port && !pm_info->client) {
- status = rpc_portmap_getclient(pm_info,
- host->name, host->addr, host->addr_len,
- proto, RPC_CLOSE_DEFAULT);
- if (status == -EHOSTUNREACH) {
- debug(logopt,
- "host not reachable getting portmap client");
- supported = status;
- goto done_ver;
- } else if (status)
+ status = get_portmap_client(logopt, pm_info, host, proto);
+ if (status) {
+ if (status == -EHOSTUNREACH)
+ supported = status;
goto done_ver;
+ }
}
if (!port) {
- parms.pm_vers = NFS2_VERSION;
- status = rpc_portmap_getport(pm_info, &parms, &rpc_info->port);
- if (status == -EHOSTUNREACH || status == -ETIMEDOUT) {
- debug(logopt,
- "host not reachable or timed out getting service port");
- supported = status;
- goto done_ver;
- } else if (status < 0)
+ status = get_portmap_port(logopt, pm_info, &parms,
+ NFS2_VERSION, version, &rpc_info->port);
+ if (status) {
+ if (status == -EHOSTUNREACH || status == -ETIMEDOUT)
+ supported = status;
goto done_ver;
+ }
}
if (rpc_info->proto == IPPROTO_UDP)
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