return clp;
}
+static void
+shutdown_callback_client(struct nfs4_client *clp)
+{
+ struct rpc_clnt *clnt = clp->cl_callback.cb_client;
+
+ /* shutdown rpc client, ending any outstanding recall rpcs */
+ if (clnt) {
+ clp->cl_callback.cb_client = NULL;
+ rpc_shutdown_client(clnt);
+ }
+}
+
static inline void
free_client(struct nfs4_client *clp)
{
+ shutdown_callback_client(clp);
if (clp->cl_cred.cr_group_info)
put_group_info(clp->cl_cred.cr_group_info);
kfree(clp->cl_name.data);
}
static void
-shutdown_callback_client(struct nfs4_client *clp)
-{
- struct rpc_clnt *clnt = clp->cl_callback.cb_client;
-
- /* shutdown rpc client, ending any outstanding recall rpcs */
- if (clnt) {
- clp->cl_callback.cb_client = NULL;
- rpc_shutdown_client(clnt);
- }
-}
-
-static void
expire_client(struct nfs4_client *clp)
{
struct nfs4_stateowner *sop;
dprintk("NFSD: expire_client cl_count %d\n",
atomic_read(&clp->cl_count));
- shutdown_callback_client(clp);
-
INIT_LIST_HEAD(&reaplist);
spin_lock(&recall_lock);
while (!list_empty(&clp->cl_delegations)) {
clp->cl_clientid.cl_id = current_clientid++;
}
-static void
-gen_confirm(struct nfs4_client *clp) {
- struct timespec tv;
- u32 * p;
+static void gen_confirm(struct nfs4_client *clp)
+{
+ static u32 i;
+ u32 *p;
- tv = CURRENT_TIME;
p = (u32 *)clp->cl_confirm.data;
- *p++ = tv.tv_sec;
- *p++ = tv.tv_nsec;
+ *p++ = get_seconds();
+ *p++ = i++;
}
static int
return;
}
-/*
- * RFC 3010 has a complex implmentation description of processing a
- * SETCLIENTID request consisting of 5 bullets, labeled as
- * CASE0 - CASE4 below.
- *
- * NOTES:
- * callback information will be processed in a future patch
- *
- * an unconfirmed record is added when:
- * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record.
- * CASE 1: confirmed record found with matching name, principal,
- * verifier, and clientid.
- * CASE 2: confirmed record found with matching name, principal,
- * and there is no unconfirmed record with matching
- * name and principal
- *
- * an unconfirmed record is replaced when:
- * CASE 3: confirmed record found with matching name, principal,
- * and an unconfirmed record is found with matching
- * name, principal, and with clientid and
- * confirm that does not match the confirmed record.
- * CASE 4: there is no confirmed record with matching name and
- * principal. there is an unconfirmed record with
- * matching name, principal.
- *
- * an unconfirmed record is deleted when:
- * CASE 1: an unconfirmed record that matches input name, verifier,
- * and confirmed clientid.
- * CASE 4: any unconfirmed records with matching name and principal
- * that exist after an unconfirmed record has been replaced
- * as described above.
- *
- */
__be32
nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_setclientid *setclid)
nfs4_lock_state();
conf = find_confirmed_client_by_str(dname, strhashval);
if (conf) {
- /*
- * CASE 0:
- * clname match, confirmed, different principal
- * or different ip_address
- */
+ /* RFC 3530 14.2.33 CASE 0: */
status = nfserr_clid_inuse;
if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)
|| conf->cl_addr != sin->sin_addr.s_addr) {
goto out;
}
}
+ /*
+ * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION")
+ * has a description of SETCLIENTID request processing consisting
+ * of 5 bullet points, labeled as CASE0 - CASE4 below.
+ */
unconf = find_unconfirmed_client_by_str(dname, strhashval);
status = nfserr_resource;
if (!conf) {
- /*
- * CASE 4:
- * placed first, because it is the normal case.
+ /*
+ * RFC 3530 14.2.33 CASE 4:
+ * placed first, because it is the normal case
*/
if (unconf)
expire_client(unconf);
new = create_client(clname, dname);
if (new == NULL)
goto out;
- copy_verf(new, &clverifier);
- new->cl_addr = sin->sin_addr.s_addr;
- copy_cred(&new->cl_cred,&rqstp->rq_cred);
gen_clid(new);
- gen_confirm(new);
- gen_callback(new, setclid);
- add_to_unconfirmed(new, strhashval);
} else if (same_verf(&conf->cl_verifier, &clverifier)) {
/*
- * CASE 1:
- * cl_name match, confirmed, principal match
- * verifier match: probable callback update
- *
- * remove any unconfirmed nfs4_client with
- * matching cl_name, cl_verifier, and cl_clientid
- *
- * create and insert an unconfirmed nfs4_client with same
- * cl_name, cl_verifier, and cl_clientid as existing
- * nfs4_client, but with the new callback info and a
- * new cl_confirm
+ * RFC 3530 14.2.33 CASE 1:
+ * probable callback update
*/
if (unconf) {
/* Note this is removing unconfirmed {*x***},
new = create_client(clname, dname);
if (new == NULL)
goto out;
- copy_verf(new,&conf->cl_verifier);
- new->cl_addr = sin->sin_addr.s_addr;
- copy_cred(&new->cl_cred,&rqstp->rq_cred);
copy_clid(new, conf);
- gen_confirm(new);
- gen_callback(new, setclid);
- add_to_unconfirmed(new,strhashval);
} else if (!unconf) {
/*
- * CASE 2:
- * clname match, confirmed, principal match
- * verfier does not match
- * no unconfirmed. create a new unconfirmed nfs4_client
- * using input clverifier, clname, and callback info
- * and generate a new cl_clientid and cl_confirm.
+ * RFC 3530 14.2.33 CASE 2:
+ * probable client reboot; state will be removed if
+ * confirmed.
*/
new = create_client(clname, dname);
if (new == NULL)
goto out;
- copy_verf(new,&clverifier);
- new->cl_addr = sin->sin_addr.s_addr;
- copy_cred(&new->cl_cred,&rqstp->rq_cred);
gen_clid(new);
- gen_confirm(new);
- gen_callback(new, setclid);
- add_to_unconfirmed(new, strhashval);
- } else if (!same_verf(&conf->cl_confirm, &unconf->cl_confirm)) {
- /*
- * CASE3:
- * confirmed found (name, principal match)
- * confirmed verifier does not match input clverifier
- *
- * unconfirmed found (name match)
- * confirmed->cl_confirm != unconfirmed->cl_confirm
- *
- * remove unconfirmed.
- *
- * create an unconfirmed nfs4_client
- * with same cl_name as existing confirmed nfs4_client,
- * but with new callback info, new cl_clientid,
- * new cl_verifier and a new cl_confirm
+ } else {
+ /*
+ * RFC 3530 14.2.33 CASE 3:
+ * probable client reboot; state will be removed if
+ * confirmed.
*/
expire_client(unconf);
new = create_client(clname, dname);
if (new == NULL)
goto out;
- copy_verf(new,&clverifier);
- new->cl_addr = sin->sin_addr.s_addr;
- copy_cred(&new->cl_cred,&rqstp->rq_cred);
gen_clid(new);
- gen_confirm(new);
- gen_callback(new, setclid);
- add_to_unconfirmed(new, strhashval);
- } else {
- /* No cases hit !!! */
- status = nfserr_inval;
- goto out;
-
}
+ copy_verf(new, &clverifier);
+ new->cl_addr = sin->sin_addr.s_addr;
+ copy_cred(&new->cl_cred, &rqstp->rq_cred);
+ gen_confirm(new);
+ gen_callback(new, setclid);
+ add_to_unconfirmed(new, strhashval);
setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot;
setclid->se_clientid.cl_id = new->cl_clientid.cl_id;
memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data));
/*
- * RFC 3010 has a complex implmentation description of processing a
- * SETCLIENTID_CONFIRM request consisting of 4 bullets describing
- * processing on a DRC miss, labeled as CASE1 - CASE4 below.
- *
- * NOTE: callback information will be processed here in a future patch
+ * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has
+ * a description of SETCLIENTID_CONFIRM request processing consisting of 4
+ * bullets, labeled as CASE1 - CASE4 below.
*/
__be32
nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
if (unconf && unconf->cl_addr != sin->sin_addr.s_addr)
goto out;
+ /*
+ * section 14.2.34 of RFC 3530 has a description of
+ * SETCLIENTID_CONFIRM request processing consisting
+ * of 4 bullet points, labeled as CASE1 - CASE4 below.
+ */
if ((conf && unconf) &&
(same_verf(&unconf->cl_confirm, &confirm)) &&
- (same_verf(&conf->cl_verifier, &unconf->cl_verifier)) &&
- (same_name(conf->cl_recdir,unconf->cl_recdir)) &&
(!same_verf(&conf->cl_confirm, &unconf->cl_confirm))) {
- /* CASE 1:
- * unconf record that matches input clientid and input confirm.
- * conf record that matches input clientid.
- * conf and unconf records match names, verifiers
- */
+ /*
+ * RFC 3530 14.2.34 CASE 1:
+ * callback update
+ */
if (!same_creds(&conf->cl_cred, &unconf->cl_cred))
status = nfserr_clid_inuse;
else {
status = nfs_ok;
}
- } else if ((conf && !unconf) ||
- ((conf && unconf) &&
- (!same_verf(&conf->cl_verifier, &unconf->cl_verifier) ||
- !same_name(conf->cl_recdir, unconf->cl_recdir)))) {
- /* CASE 2:
- * conf record that matches input clientid.
- * if unconf record matches input clientid, then
- * unconf->cl_name or unconf->cl_verifier don't match the
- * conf record.
+ } else if (conf && !unconf) {
+ /*
+ * RFC 3530 14.2.34 CASE 2:
+ * probable retransmitted request; play it safe and
+ * do nothing.
*/
if (!same_creds(&conf->cl_cred, &rqstp->rq_cred))
status = nfserr_clid_inuse;
status = nfs_ok;
} else if (!conf && unconf
&& same_verf(&unconf->cl_confirm, &confirm)) {
- /* CASE 3:
- * conf record not found.
- * unconf record found.
- * unconf->cl_confirm matches input confirm
+ /*
+ * RFC 3530 14.2.34 CASE 3:
+ * Normal case; new or rebooted client:
*/
if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) {
status = nfserr_clid_inuse;
}
move_to_confirmed(unconf);
conf = unconf;
+ nfsd4_probe_callback(conf);
status = nfs_ok;
}
} else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm)))
&& (!unconf || (unconf && !same_verf(&unconf->cl_confirm,
&confirm)))) {
- /* CASE 4:
- * conf record not found, or if conf, conf->cl_confirm does not
- * match input confirm.
- * unconf record not found, or if unconf, unconf->cl_confirm
- * does not match input confirm.
+ /*
+ * RFC 3530 14.2.34 CASE 4:
+ * Client probably hasn't noticed that we rebooted yet.
*/
status = nfserr_stale_clientid;
} else {
status = nfserr_clid_inuse;
}
out:
- if (!status)
- nfsd4_probe_callback(conf);
nfs4_unlock_state();
return status;
}
* lock) we know the server hasn't removed the lease yet, we know
* it's safe to take a reference: */
atomic_inc(&dp->dl_count);
+ atomic_inc(&dp->dl_client->cl_count);
spin_lock(&recall_lock);
list_add_tail(&dp->dl_recall_lru, &del_recall_lru);
/* only place dl_time is set. protected by lock_kernel*/
dp->dl_time = get_seconds();
- /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */
- fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ;
+ /*
+ * We don't want the locks code to timeout the lease for us;
+ * we'll remove it ourself if the delegation isn't returned
+ * in time.
+ */
+ fl->fl_break_time = 0;
t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall");
if (IS_ERR(t)) {
printk(KERN_INFO "NFSD: Callback thread failed for "
"for client (clientid %08x/%08x)\n",
clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id);
+ put_nfs4_client(dp->dl_client);
nfs4_put_delegation(dp);
}
}
io_during_grace_disallowed(struct inode *inode, int flags)
{
return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE))
- && MANDATORY_LOCK(inode);
+ && mandatory_lock(inode);
}
/*
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff