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[PATCH] knfsd: lockd: optionally use hostnames for identifying peers

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This patch adds the nsm_use_hostnames sysctl and module param.  If set, lockd
will use the client's name (as given in the NLM arguments) to find the NSM
handle.  This makes recovery work when the NFS peer is multi-homed, and the
reboot notification arrives from a different IP than the original lock calls.

Signed-off-by: Olaf Kirch <okir@suse.de>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Olaf Kirch
2006-10-04 02:16:01 -07:00
committed by Linus Torvalds
parent 350fce8dbf
commit abd1f50094
5 changed files with 27 additions and 4 deletions
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6
fs/lockd/host.c
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@@ -462,7 +462,11 @@ __nsm_find(const struct sockaddr_in *sin,
list_for_each(pos, &nsm_handles) {
nsm = list_entry(pos, struct nsm_handle, sm_link);
if (!nlm_cmp_addr(&nsm->sm_addr, sin))
if (hostname && nsm_use_hostnames) {
if (strlen(nsm->sm_name) != hostname_len
|| memcmp(nsm->sm_name, hostname, hostname_len))
continue;
} else if (!nlm_cmp_addr(&nsm->sm_addr, sin))
continue;
atomic_inc(&nsm->sm_count);
goto out;