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[PATCH] knfsd: lockd: Make nlm_host_rebooted use the nsm_handle

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This patch makes the SM_NOTIFY handling understand and use the nsm_handle.

To make it a bit clear what is happening:

    nlmclent_prepare_reclaim and nlmclnt_finish_reclaim
    get open-coded into 'reclaimer'

The result is tidied up.

Then some of that functionality is moved out into nlm_host_rebooted (which
calls nlmclnt_recovery which starts a thread which runs reclaimer).

Also host_rebooted now finds an nsm_handle rather than a host, then then
iterates over all hosts and deals with each host that shares that nsm_handle.

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 02:15:55 -07:00
committed by Linus Torvalds
parent f0737a39a6
commit 5c8dd29ca7
5 changed files with 69 additions and 57 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
fs/lockd/clntlock.c
View File

@ -143,44 +143,13 @@ u32 nlmclnt_grant(const struct sockaddr_in *addr, const struct nlm_lock *lock)
* server crash.
*/
/*
* Someone has sent us an SM_NOTIFY. Ensure we bind to the new port number,
* that we mark locks for reclaiming, and that we bump the pseudo NSM state.
*/
static void nlmclnt_prepare_reclaim(struct nlm_host *host)
{
down_write(&host->h_rwsem);
if (host->h_nsmhandle)
host->h_nsmhandle->sm_monitored = 0;
host->h_state++;
host->h_nextrebind = 0;
nlm_rebind_host(host);
/*
* Mark the locks for reclaiming.
*/
list_splice_init(&host->h_granted, &host->h_reclaim);
dprintk("NLM: reclaiming locks for host %s\n", host->h_name);
}
static void nlmclnt_finish_reclaim(struct nlm_host *host)
{
host->h_reclaiming = 0;
up_write(&host->h_rwsem);
dprintk("NLM: done reclaiming locks for host %s", host->h_name);
}
/*
* Reclaim all locks on server host. We do this by spawning a separate
* reclaimer thread.
*/
void
nlmclnt_recovery(struct nlm_host *host, u32 newstate)
nlmclnt_recovery(struct nlm_host *host)
{
if (host->h_nsmstate == newstate)
return;
host->h_nsmstate = newstate;
if (!host->h_reclaiming++) {
nlm_get_host(host);
__module_get(THIS_MODULE);
@ -200,18 +169,30 @@ reclaimer(void *ptr)
daemonize("%s-reclaim", host->h_name);
allow_signal(SIGKILL);
down_write(&host->h_rwsem);
/* This one ensures that our parent doesn't terminate while the
* reclaim is in progress */
lock_kernel();
lockd_up(0); /* note: this cannot fail as lockd is already running */
nlmclnt_prepare_reclaim(host);
/* First, reclaim all locks that have been marked. */
dprintk("lockd: reclaiming locks for host %s", host->h_name);
restart:
nsmstate = host->h_nsmstate;
/* Force a portmap getport - the peer's lockd will
* most likely end up on a different port.
*/
host->h_nextrebind = 0;
nlm_rebind_host(host);
/* First, reclaim all locks that have been granted. */
list_splice_init(&host->h_granted, &host->h_reclaim);
list_for_each_entry_safe(fl, next, &host->h_reclaim, fl_u.nfs_fl.list) {
list_del_init(&fl->fl_u.nfs_fl.list);
/* Why are we leaking memory here? --okir */
if (signalled())
continue;
if (nlmclnt_reclaim(host, fl) != 0)
@ -219,11 +200,13 @@ restart:
list_add_tail(&fl->fl_u.nfs_fl.list, &host->h_granted);
if (host->h_nsmstate != nsmstate) {
/* Argh! The server rebooted again! */
list_splice_init(&host->h_granted, &host->h_reclaim);
goto restart;
}
}
nlmclnt_finish_reclaim(host);
host->h_reclaiming = 0;
up_write(&host->h_rwsem);
dprintk("NLM: done reclaiming locks for host %s", host->h_name);
/* Now, wake up all processes that sleep on a blocked lock */
list_for_each_entry(block, &nlm_blocked, b_list) {