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Diffstat (limited to 'fs/lockd/mon.c')
-rw-r--r--fs/lockd/mon.c125
1 files changed, 37 insertions, 88 deletions
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 47a32b6d9b90..19166d4a8d31 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -42,7 +42,7 @@ struct nsm_args {
u32 proc;
char *mon_name;
- char *nodename;
+ const char *nodename;
};
struct nsm_res {
@@ -51,7 +51,6 @@ struct nsm_res {
};
static const struct rpc_program nsm_program;
-static LIST_HEAD(nsm_handles);
static DEFINE_SPINLOCK(nsm_lock);
/*
@@ -87,69 +86,18 @@ static struct rpc_clnt *nsm_create(struct net *net, const char *nodename)
return rpc_create(&args);
}
-static struct rpc_clnt *nsm_client_set(struct lockd_net *ln,
- struct rpc_clnt *clnt)
-{
- spin_lock(&ln->nsm_clnt_lock);
- if (ln->nsm_users == 0) {
- if (clnt == NULL)
- goto out;
- ln->nsm_clnt = clnt;
- }
- clnt = ln->nsm_clnt;
- ln->nsm_users++;
-out:
- spin_unlock(&ln->nsm_clnt_lock);
- return clnt;
-}
-
-static struct rpc_clnt *nsm_client_get(struct net *net, const char *nodename)
-{
- struct rpc_clnt *clnt, *new;
- struct lockd_net *ln = net_generic(net, lockd_net_id);
-
- clnt = nsm_client_set(ln, NULL);
- if (clnt != NULL)
- goto out;
-
- clnt = new = nsm_create(net, nodename);
- if (IS_ERR(clnt))
- goto out;
-
- clnt = nsm_client_set(ln, new);
- if (clnt != new)
- rpc_shutdown_client(new);
-out:
- return clnt;
-}
-
-static void nsm_client_put(struct net *net)
-{
- struct lockd_net *ln = net_generic(net, lockd_net_id);
- struct rpc_clnt *clnt = NULL;
-
- spin_lock(&ln->nsm_clnt_lock);
- ln->nsm_users--;
- if (ln->nsm_users == 0) {
- clnt = ln->nsm_clnt;
- ln->nsm_clnt = NULL;
- }
- spin_unlock(&ln->nsm_clnt_lock);
- if (clnt != NULL)
- rpc_shutdown_client(clnt);
-}
-
static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res,
- struct rpc_clnt *clnt)
+ const struct nlm_host *host)
{
int status;
+ struct rpc_clnt *clnt;
struct nsm_args args = {
.priv = &nsm->sm_priv,
.prog = NLM_PROGRAM,
.vers = 3,
.proc = NLMPROC_NSM_NOTIFY,
.mon_name = nsm->sm_mon_name,
- .nodename = clnt->cl_nodename,
+ .nodename = host->nodename,
};
struct rpc_message msg = {
.rpc_argp = &args,
@@ -158,6 +106,13 @@ static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res,
memset(res, 0, sizeof(*res));
+ clnt = nsm_create(host->net, host->nodename);
+ if (IS_ERR(clnt)) {
+ dprintk("lockd: failed to create NSM upcall transport, "
+ "status=%ld, net=%p\n", PTR_ERR(clnt), host->net);
+ return PTR_ERR(clnt);
+ }
+
msg.rpc_proc = &clnt->cl_procinfo[proc];
status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFTCONN);
if (status == -ECONNREFUSED) {
@@ -171,6 +126,8 @@ static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res,
status);
else
status = 0;
+
+ rpc_shutdown_client(clnt);
return status;
}
@@ -190,32 +147,19 @@ int nsm_monitor(const struct nlm_host *host)
struct nsm_handle *nsm = host->h_nsmhandle;
struct nsm_res res;
int status;
- struct rpc_clnt *clnt;
- const char *nodename = NULL;
dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name);
if (nsm->sm_monitored)
return 0;
- if (host->h_rpcclnt)
- nodename = host->h_rpcclnt->cl_nodename;
-
/*
* Choose whether to record the caller_name or IP address of
* this peer in the local rpc.statd's database.
*/
nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf;
- clnt = nsm_client_get(host->net, nodename);
- if (IS_ERR(clnt)) {
- status = PTR_ERR(clnt);
- dprintk("lockd: failed to create NSM upcall transport, "
- "status=%d, net=%p\n", status, host->net);
- return status;
- }
-
- status = nsm_mon_unmon(nsm, NSMPROC_MON, &res, clnt);
+ status = nsm_mon_unmon(nsm, NSMPROC_MON, &res, host);
if (unlikely(res.status != 0))
status = -EIO;
if (unlikely(status < 0)) {
@@ -247,11 +191,9 @@ void nsm_unmonitor(const struct nlm_host *host)
if (atomic_read(&nsm->sm_count) == 1
&& nsm->sm_monitored && !nsm->sm_sticky) {
- struct lockd_net *ln = net_generic(host->net, lockd_net_id);
-
dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name);
- status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res, ln->nsm_clnt);
+ status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res, host);
if (res.status != 0)
status = -EIO;
if (status < 0)
@@ -259,38 +201,38 @@ void nsm_unmonitor(const struct nlm_host *host)
nsm->sm_name);
else
nsm->sm_monitored = 0;
-
- nsm_client_put(host->net);
}
}
-static struct nsm_handle *nsm_lookup_hostname(const char *hostname,
- const size_t len)
+static struct nsm_handle *nsm_lookup_hostname(const struct list_head *nsm_handles,
+ const char *hostname, const size_t len)
{
struct nsm_handle *nsm;
- list_for_each_entry(nsm, &nsm_handles, sm_link)
+ list_for_each_entry(nsm, nsm_handles, sm_link)
if (strlen(nsm->sm_name) == len &&
memcmp(nsm->sm_name, hostname, len) == 0)
return nsm;
return NULL;
}
-static struct nsm_handle *nsm_lookup_addr(const struct sockaddr *sap)
+static struct nsm_handle *nsm_lookup_addr(const struct list_head *nsm_handles,
+ const struct sockaddr *sap)
{
struct nsm_handle *nsm;
- list_for_each_entry(nsm, &nsm_handles, sm_link)
+ list_for_each_entry(nsm, nsm_handles, sm_link)
if (rpc_cmp_addr(nsm_addr(nsm), sap))
return nsm;
return NULL;
}
-static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv)
+static struct nsm_handle *nsm_lookup_priv(const struct list_head *nsm_handles,
+ const struct nsm_private *priv)
{
struct nsm_handle *nsm;
- list_for_each_entry(nsm, &nsm_handles, sm_link)
+ list_for_each_entry(nsm, nsm_handles, sm_link)
if (memcmp(nsm->sm_priv.data, priv->data,
sizeof(priv->data)) == 0)
return nsm;
@@ -353,6 +295,7 @@ static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap,
/**
* nsm_get_handle - Find or create a cached nsm_handle
+ * @net: network namespace
* @sap: pointer to socket address of handle to find
* @salen: length of socket address
* @hostname: pointer to C string containing hostname to find
@@ -365,11 +308,13 @@ static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap,
* @hostname cannot be found in the handle cache. Returns NULL if
* an error occurs.
*/
-struct nsm_handle *nsm_get_handle(const struct sockaddr *sap,
+struct nsm_handle *nsm_get_handle(const struct net *net,
+ const struct sockaddr *sap,
const size_t salen, const char *hostname,
const size_t hostname_len)
{
struct nsm_handle *cached, *new = NULL;
+ struct lockd_net *ln = net_generic(net, lockd_net_id);
if (hostname && memchr(hostname, '/', hostname_len) != NULL) {
if (printk_ratelimit()) {
@@ -384,9 +329,10 @@ retry:
spin_lock(&nsm_lock);
if (nsm_use_hostnames && hostname != NULL)
- cached = nsm_lookup_hostname(hostname, hostname_len);
+ cached = nsm_lookup_hostname(&ln->nsm_handles,
+ hostname, hostname_len);
else
- cached = nsm_lookup_addr(sap);
+ cached = nsm_lookup_addr(&ln->nsm_handles, sap);
if (cached != NULL) {
atomic_inc(&cached->sm_count);
@@ -400,7 +346,7 @@ retry:
}
if (new != NULL) {
- list_add(&new->sm_link, &nsm_handles);
+ list_add(&new->sm_link, &ln->nsm_handles);
spin_unlock(&nsm_lock);
dprintk("lockd: created nsm_handle for %s (%s)\n",
new->sm_name, new->sm_addrbuf);
@@ -417,19 +363,22 @@ retry:
/**
* nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle
+ * @net: network namespace
* @info: pointer to NLMPROC_SM_NOTIFY arguments
*
* Returns a matching nsm_handle if found in the nsm cache. The returned
* nsm_handle's reference count is bumped. Otherwise returns NULL if some
* error occurred.
*/
-struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info)
+struct nsm_handle *nsm_reboot_lookup(const struct net *net,
+ const struct nlm_reboot *info)
{
struct nsm_handle *cached;
+ struct lockd_net *ln = net_generic(net, lockd_net_id);
spin_lock(&nsm_lock);
- cached = nsm_lookup_priv(&info->priv);
+ cached = nsm_lookup_priv(&ln->nsm_handles, &info->priv);
if (unlikely(cached == NULL)) {
spin_unlock(&nsm_lock);
dprintk("lockd: never saw rebooted peer '%.*s' before\n",
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-11 08:48:06 +0000