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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

63
fs/lockd/host.c
View File

@@ -290,28 +290,57 @@ void nlm_release_host(struct nlm_host *host)
* has rebooted.
* Release all resources held by that peer.
*/
void nlm_host_rebooted(const struct sockaddr_in *sin, const struct nlm_reboot *argp)
void nlm_host_rebooted(const struct sockaddr_in *sin,
const char *hostname, int hostname_len,
u32 new_state)
{
struct nlm_host *host;
int server;
struct nsm_handle *nsm;
struct nlm_host *host, **hp;
int hash;
/* Obtain the host pointer for this NFS server and try to
* reclaim all locks we hold on this server.
*/
server = (argp->proto & 1)? 1 : 0;
host = nlm_lookup_host(server, sin, argp->proto >> 1, argp->vers,
argp->mon, argp->len);
if (host == NULL)
dprintk("lockd: nlm_host_rebooted(%s, %u.%u.%u.%u)\n",
hostname, NIPQUAD(sin->sin_addr));
/* Find the NSM handle for this peer */
if (!(nsm = __nsm_find(sin, hostname, hostname_len, 0)))
return;
if (server == 0) {
/* We are client, he's the server: try to reclaim all locks. */
nlmclnt_recovery(host, argp->state);
} else {
/* He's the client, we're the server: delete all locks held by the client */
nlmsvc_free_host_resources(host);
/* When reclaiming locks on this peer, make sure that
* we set up a new notification */
nsm->sm_monitored = 0;
/* Mark all hosts tied to this NSM state as having rebooted.
* We run the loop repeatedly, because we drop the host table
* lock for this.
* To avoid processing a host several times, we match the nsmstate.
*/
again: mutex_lock(&nlm_host_mutex);
for (hash = 0; hash < NLM_HOST_NRHASH; hash++) {
for (hp = &nlm_hosts[hash]; (host = *hp); hp = &host->h_next) {
if (host->h_nsmhandle == nsm
&& host->h_nsmstate != new_state) {
host->h_nsmstate = new_state;
host->h_state++;
nlm_get_host(host);
mutex_unlock(&nlm_host_mutex);
if (host->h_server) {
/* We're server for this guy, just ditch
* all the locks he held. */
nlmsvc_free_host_resources(host);
} else {
/* He's the server, initiate lock recovery. */
nlmclnt_recovery(host);
}
nlm_release_host(host);
goto again;
}
}
}
nlm_release_host(host);
mutex_unlock(&nlm_host_mutex);
}
/*