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-rw-r--r--fs/lockd/clntproc.c7
-rw-r--r--fs/lockd/host.c170
-rw-r--r--fs/lockd/mon.c569
-rw-r--r--fs/lockd/svc.c72
-rw-r--r--fs/lockd/svc4proc.c13
-rw-r--r--fs/lockd/svcproc.c13
-rw-r--r--fs/lockd/svcsubs.c1
-rw-r--r--fs/lockd/xdr.c5
-rw-r--r--fs/lockd/xdr4.c5
9 files changed, 497 insertions, 358 deletions
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index 31668b690e0..dd7957064a8 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -16,7 +16,6 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/lockd/lockd.h>
-#include <linux/lockd/sm_inter.h>
#define NLMDBG_FACILITY NLMDBG_CLIENT
#define NLMCLNT_GRACE_WAIT (5*HZ)
@@ -518,11 +517,9 @@ nlmclnt_lock(struct nlm_rqst *req, struct file_lock *fl)
unsigned char fl_type;
int status = -ENOLCK;
- if (nsm_monitor(host) < 0) {
- printk(KERN_NOTICE "lockd: failed to monitor %s\n",
- host->h_name);
+ if (nsm_monitor(host) < 0)
goto out;
- }
+
fl->fl_flags |= FL_ACCESS;
status = do_vfs_lock(fl);
fl->fl_flags = fl_flags;
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index abdebf76b82..99d737bd432 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -15,7 +15,6 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/lockd/lockd.h>
-#include <linux/lockd/sm_inter.h>
#include <linux/mutex.h>
#include <net/ipv6.h>
@@ -32,11 +31,6 @@ static int nrhosts;
static DEFINE_MUTEX(nlm_host_mutex);
static void nlm_gc_hosts(void);
-static struct nsm_handle *nsm_find(const struct sockaddr *sap,
- const size_t salen,
- const char *hostname,
- const size_t hostname_len,
- const int create);
struct nlm_lookup_host_info {
const int server; /* search for server|client */
@@ -105,32 +99,6 @@ static void nlm_clear_port(struct sockaddr *sap)
}
}
-static void nlm_display_address(const struct sockaddr *sap,
- char *buf, const size_t len)
-{
- const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
- const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
-
- switch (sap->sa_family) {
- case AF_UNSPEC:
- snprintf(buf, len, "unspecified");
- break;
- case AF_INET:
- snprintf(buf, len, "%pI4", &sin->sin_addr.s_addr);
- break;
- case AF_INET6:
- if (ipv6_addr_v4mapped(&sin6->sin6_addr))
- snprintf(buf, len, "%pI4",
- &sin6->sin6_addr.s6_addr32[3]);
- else
- snprintf(buf, len, "%pI6", &sin6->sin6_addr);
- break;
- default:
- snprintf(buf, len, "unsupported address family");
- break;
- }
-}
-
/*
* Common host lookup routine for server & client
*/
@@ -190,8 +158,8 @@ static struct nlm_host *nlm_lookup_host(struct nlm_lookup_host_info *ni)
atomic_inc(&nsm->sm_count);
else {
host = NULL;
- nsm = nsm_find(ni->sap, ni->salen,
- ni->hostname, ni->hostname_len, 1);
+ nsm = nsm_get_handle(ni->sap, ni->salen,
+ ni->hostname, ni->hostname_len);
if (!nsm) {
dprintk("lockd: nlm_lookup_host failed; "
"no nsm handle\n");
@@ -206,6 +174,7 @@ static struct nlm_host *nlm_lookup_host(struct nlm_lookup_host_info *ni)
goto out;
}
host->h_name = nsm->sm_name;
+ host->h_addrbuf = nsm->sm_addrbuf;
memcpy(nlm_addr(host), ni->sap, ni->salen);
host->h_addrlen = ni->salen;
nlm_clear_port(nlm_addr(host));
@@ -232,11 +201,6 @@ static struct nlm_host *nlm_lookup_host(struct nlm_lookup_host_info *ni)
nrhosts++;
- nlm_display_address((struct sockaddr *)&host->h_addr,
- host->h_addrbuf, sizeof(host->h_addrbuf));
- nlm_display_address((struct sockaddr *)&host->h_srcaddr,
- host->h_srcaddrbuf, sizeof(host->h_srcaddrbuf));
-
dprintk("lockd: nlm_lookup_host created host %s\n",
host->h_name);
@@ -256,10 +220,8 @@ nlm_destroy_host(struct nlm_host *host)
BUG_ON(!list_empty(&host->h_lockowners));
BUG_ON(atomic_read(&host->h_count));
- /*
- * Release NSM handle and unmonitor host.
- */
nsm_unmonitor(host);
+ nsm_release(host->h_nsmhandle);
clnt = host->h_rpcclnt;
if (clnt != NULL)
@@ -378,8 +340,8 @@ nlm_bind_host(struct nlm_host *host)
{
struct rpc_clnt *clnt;
- dprintk("lockd: nlm_bind_host %s (%s), my addr=%s\n",
- host->h_name, host->h_addrbuf, host->h_srcaddrbuf);
+ dprintk("lockd: nlm_bind_host %s (%s)\n",
+ host->h_name, host->h_addrbuf);
/* Lock host handle */
mutex_lock(&host->h_mutex);
@@ -481,35 +443,23 @@ void nlm_release_host(struct nlm_host *host)
}
}
-/*
- * We were notified that the host indicated by address &sin
- * has rebooted.
- * Release all resources held by that peer.
+/**
+ * nlm_host_rebooted - Release all resources held by rebooted host
+ * @info: pointer to decoded results of NLM_SM_NOTIFY call
+ *
+ * We were notified that the specified host has rebooted. Release
+ * all resources held by that peer.
*/
-void nlm_host_rebooted(const struct sockaddr_in *sin,
- const char *hostname,
- unsigned int hostname_len,
- u32 new_state)
+void nlm_host_rebooted(const struct nlm_reboot *info)
{
struct hlist_head *chain;
struct hlist_node *pos;
struct nsm_handle *nsm;
struct nlm_host *host;
- nsm = nsm_find((struct sockaddr *)sin, sizeof(*sin),
- hostname, hostname_len, 0);
- if (nsm == NULL) {
- dprintk("lockd: never saw rebooted peer '%.*s' before\n",
- hostname_len, hostname);
+ nsm = nsm_reboot_lookup(info);
+ if (unlikely(nsm == NULL))
return;
- }
-
- dprintk("lockd: nlm_host_rebooted(%.*s, %s)\n",
- hostname_len, hostname, nsm->sm_addrbuf);
-
- /* 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
@@ -520,8 +470,8 @@ again: mutex_lock(&nlm_host_mutex);
for (chain = nlm_hosts; chain < nlm_hosts + NLM_HOST_NRHASH; ++chain) {
hlist_for_each_entry(host, pos, chain, h_hash) {
if (host->h_nsmhandle == nsm
- && host->h_nsmstate != new_state) {
- host->h_nsmstate = new_state;
+ && host->h_nsmstate != info->state) {
+ host->h_nsmstate = info->state;
host->h_state++;
nlm_get_host(host);
@@ -629,89 +579,3 @@ nlm_gc_hosts(void)
next_gc = jiffies + NLM_HOST_COLLECT;
}
-
-
-/*
- * Manage NSM handles
- */
-static LIST_HEAD(nsm_handles);
-static DEFINE_SPINLOCK(nsm_lock);
-
-static struct nsm_handle *nsm_find(const struct sockaddr *sap,
- const size_t salen,
- const char *hostname,
- const size_t hostname_len,
- const int create)
-{
- struct nsm_handle *nsm = NULL;
- struct nsm_handle *pos;
-
- if (!sap)
- return NULL;
-
- if (hostname && memchr(hostname, '/', hostname_len) != NULL) {
- if (printk_ratelimit()) {
- printk(KERN_WARNING "Invalid hostname \"%.*s\" "
- "in NFS lock request\n",
- (int)hostname_len, hostname);
- }
- return NULL;
- }
-
-retry:
- spin_lock(&nsm_lock);
- list_for_each_entry(pos, &nsm_handles, sm_link) {
-
- if (hostname && nsm_use_hostnames) {
- if (strlen(pos->sm_name) != hostname_len
- || memcmp(pos->sm_name, hostname, hostname_len))
- continue;
- } else if (!nlm_cmp_addr(nsm_addr(pos), sap))
- continue;
- atomic_inc(&pos->sm_count);
- kfree(nsm);
- nsm = pos;
- goto found;
- }
- if (nsm) {
- list_add(&nsm->sm_link, &nsm_handles);
- goto found;
- }
- spin_unlock(&nsm_lock);
-
- if (!create)
- return NULL;
-
- nsm = kzalloc(sizeof(*nsm) + hostname_len + 1, GFP_KERNEL);
- if (nsm == NULL)
- return NULL;
-
- memcpy(nsm_addr(nsm), sap, salen);
- nsm->sm_addrlen = salen;
- nsm->sm_name = (char *) (nsm + 1);
- memcpy(nsm->sm_name, hostname, hostname_len);
- nsm->sm_name[hostname_len] = '\0';
- nlm_display_address((struct sockaddr *)&nsm->sm_addr,
- nsm->sm_addrbuf, sizeof(nsm->sm_addrbuf));
- atomic_set(&nsm->sm_count, 1);
- goto retry;
-
-found:
- spin_unlock(&nsm_lock);
- return nsm;
-}
-
-/*
- * Release an NSM handle
- */
-void
-nsm_release(struct nsm_handle *nsm)
-{
- if (!nsm)
- return;
- if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) {
- list_del(&nsm->sm_link);
- spin_unlock(&nsm_lock);
- kfree(nsm);
- }
-}
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index ffd3461f75e..5e2c4d5ac82 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -9,35 +9,123 @@
#include <linux/types.h>
#include <linux/utsname.h>
#include <linux/kernel.h>
+#include <linux/ktime.h>
+
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/xprtsock.h>
#include <linux/sunrpc/svc.h>
#include <linux/lockd/lockd.h>
-#include <linux/lockd/sm_inter.h>
-
#define NLMDBG_FACILITY NLMDBG_MONITOR
+#define NSM_PROGRAM 100024
+#define NSM_VERSION 1
+
+enum {
+ NSMPROC_NULL,
+ NSMPROC_STAT,
+ NSMPROC_MON,
+ NSMPROC_UNMON,
+ NSMPROC_UNMON_ALL,
+ NSMPROC_SIMU_CRASH,
+ NSMPROC_NOTIFY,
+};
+
+struct nsm_args {
+ struct nsm_private *priv;
+ u32 prog; /* RPC callback info */
+ u32 vers;
+ u32 proc;
-#define XDR_ADDRBUF_LEN (20)
+ char *mon_name;
+};
-static struct rpc_clnt * nsm_create(void);
+struct nsm_res {
+ u32 status;
+ u32 state;
+};
static struct rpc_program nsm_program;
+static LIST_HEAD(nsm_handles);
+static DEFINE_SPINLOCK(nsm_lock);
/*
* Local NSM state
*/
-int nsm_local_state;
+int __read_mostly nsm_local_state;
+int __read_mostly nsm_use_hostnames;
-/*
- * Common procedure for SM_MON/SM_UNMON calls
- */
-static int
-nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
+static inline struct sockaddr *nsm_addr(const struct nsm_handle *nsm)
+{
+ return (struct sockaddr *)&nsm->sm_addr;
+}
+
+static void nsm_display_ipv4_address(const struct sockaddr *sap, char *buf,
+ const size_t len)
+{
+ const struct sockaddr_in *sin = (struct sockaddr_in *)sap;
+ snprintf(buf, len, "%pI4", &sin->sin_addr.s_addr);
+}
+
+static void nsm_display_ipv6_address(const struct sockaddr *sap, char *buf,
+ const size_t len)
+{
+ const struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sap;
+
+ if (ipv6_addr_v4mapped(&sin6->sin6_addr))
+ snprintf(buf, len, "%pI4", &sin6->sin6_addr.s6_addr32[3]);
+ else if (sin6->sin6_scope_id != 0)
+ snprintf(buf, len, "%pI6%%%u", &sin6->sin6_addr,
+ sin6->sin6_scope_id);
+ else
+ snprintf(buf, len, "%pI6", &sin6->sin6_addr);
+}
+
+static void nsm_display_address(const struct sockaddr *sap,
+ char *buf, const size_t len)
+{
+ switch (sap->sa_family) {
+ case AF_INET:
+ nsm_display_ipv4_address(sap, buf, len);
+ break;
+ case AF_INET6:
+ nsm_display_ipv6_address(sap, buf, len);
+ break;
+ default:
+ snprintf(buf, len, "unsupported address family");
+ break;
+ }
+}
+
+static struct rpc_clnt *nsm_create(void)
+{
+ struct sockaddr_in sin = {
+ .sin_family = AF_INET,
+ .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
+ };
+ struct rpc_create_args args = {
+ .protocol = XPRT_TRANSPORT_UDP,
+ .address = (struct sockaddr *)&sin,
+ .addrsize = sizeof(sin),
+ .servername = "rpc.statd",
+ .program = &nsm_program,
+ .version = NSM_VERSION,
+ .authflavor = RPC_AUTH_NULL,
+ };
+
+ return rpc_create(&args);
+}
+
+static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
{
struct rpc_clnt *clnt;
int status;
- struct nsm_args args;
+ struct nsm_args args = {
+ .priv = &nsm->sm_priv,
+ .prog = NLM_PROGRAM,
+ .vers = 3,
+ .proc = NLMPROC_NSM_NOTIFY,
+ .mon_name = nsm->sm_mon_name,
+ };
struct rpc_message msg = {
.rpc_argp = &args,
.rpc_resp = res,
@@ -46,22 +134,18 @@ nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
clnt = nsm_create();
if (IS_ERR(clnt)) {
status = PTR_ERR(clnt);
+ dprintk("lockd: failed to create NSM upcall transport, "
+ "status=%d\n", status);
goto out;
}
- memset(&args, 0, sizeof(args));
- args.mon_name = nsm->sm_name;
- args.addr = nsm_addr_in(nsm)->sin_addr.s_addr;
- args.prog = NLM_PROGRAM;
- args.vers = 3;
- args.proc = NLMPROC_NSM_NOTIFY;
memset(res, 0, sizeof(*res));
msg.rpc_proc = &clnt->cl_procinfo[proc];
status = rpc_call_sync(clnt, &msg, 0);
if (status < 0)
- printk(KERN_DEBUG "nsm_mon_unmon: rpc failed, status=%d\n",
- status);
+ dprintk("lockd: NSM upcall RPC failed, status=%d\n",
+ status);
else
status = 0;
rpc_shutdown_client(clnt);
@@ -69,82 +153,272 @@ nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
return status;
}
-/*
- * Set up monitoring of a remote host
+/**
+ * nsm_monitor - Notify a peer in case we reboot
+ * @host: pointer to nlm_host of peer to notify
+ *
+ * If this peer is not already monitored, this function sends an
+ * upcall to the local rpc.statd to record the name/address of
+ * the peer to notify in case we reboot.
+ *
+ * Returns zero if the peer is monitored by the local rpc.statd;
+ * otherwise a negative errno value is returned.
*/
-int
-nsm_monitor(struct nlm_host *host)
+int nsm_monitor(const struct nlm_host *host)
{
struct nsm_handle *nsm = host->h_nsmhandle;
struct nsm_res res;
int status;
- dprintk("lockd: nsm_monitor(%s)\n", host->h_name);
- BUG_ON(nsm == NULL);
+ dprintk("lockd: nsm_monitor(%s)\n", nsm->sm_name);
if (nsm->sm_monitored)
return 0;
- status = nsm_mon_unmon(nsm, SM_MON, &res);
+ /*
+ * 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;
- if (status < 0 || res.status != 0)
- printk(KERN_NOTICE "lockd: cannot monitor %s\n", host->h_name);
+ status = nsm_mon_unmon(nsm, NSMPROC_MON, &res);
+ if (res.status != 0)
+ status = -EIO;
+ if (status < 0)
+ printk(KERN_NOTICE "lockd: cannot monitor %s\n", nsm->sm_name);
else
nsm->sm_monitored = 1;
return status;
}
-/*
- * Cease to monitor remote host
+/**
+ * nsm_unmonitor - Unregister peer notification
+ * @host: pointer to nlm_host of peer to stop monitoring
+ *
+ * If this peer is monitored, this function sends an upcall to
+ * tell the local rpc.statd not to send this peer a notification
+ * when we reboot.
*/
-int
-nsm_unmonitor(struct nlm_host *host)
+void nsm_unmonitor(const struct nlm_host *host)
{
struct nsm_handle *nsm = host->h_nsmhandle;
struct nsm_res res;
- int status = 0;
-
- if (nsm == NULL)
- return 0;
- host->h_nsmhandle = NULL;
+ int status;
if (atomic_read(&nsm->sm_count) == 1
&& nsm->sm_monitored && !nsm->sm_sticky) {
- dprintk("lockd: nsm_unmonitor(%s)\n", host->h_name);
+ dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name);
- status = nsm_mon_unmon(nsm, SM_UNMON, &res);
+ status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res);
+ if (res.status != 0)
+ status = -EIO;
if (status < 0)
printk(KERN_NOTICE "lockd: cannot unmonitor %s\n",
- host->h_name);
+ nsm->sm_name);
else
nsm->sm_monitored = 0;
}
- nsm_release(nsm);
- return status;
+}
+
+static struct nsm_handle *nsm_lookup_hostname(const char *hostname,
+ const size_t len)
+{
+ struct nsm_handle *nsm;
+
+ 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)
+{
+ struct nsm_handle *nsm;
+
+ list_for_each_entry(nsm, &nsm_handles, sm_link)
+ if (nlm_cmp_addr(nsm_addr(nsm), sap))
+ return nsm;
+ return NULL;
+}
+
+static struct nsm_handle *nsm_lookup_priv(const struct nsm_private *priv)
+{
+ struct nsm_handle *nsm;
+
+ list_for_each_entry(nsm, &nsm_handles, sm_link)
+ if (memcmp(nsm->sm_priv.data, priv->data,
+ sizeof(priv->data)) == 0)
+ return nsm;
+ return NULL;
}
/*
- * Create NSM client for the local host
+ * Construct a unique cookie to match this nsm_handle to this monitored
+ * host. It is passed to the local rpc.statd via NSMPROC_MON, and
+ * returned via NLMPROC_SM_NOTIFY, in the "priv" field of these
+ * requests.
+ *
+ * The NSM protocol requires that these cookies be unique while the
+ * system is running. We prefer a stronger requirement of making them
+ * unique across reboots. If user space bugs cause a stale cookie to
+ * be sent to the kernel, it could cause the wrong host to lose its
+ * lock state if cookies were not unique across reboots.
+ *
+ * The cookies are exposed only to local user space via loopback. They
+ * do not appear on the physical network. If we want greater security
+ * for some reason, nsm_init_private() could perform a one-way hash to
+ * obscure the contents of the cookie.
*/
-static struct rpc_clnt *
-nsm_create(void)
+static void nsm_init_private(struct nsm_handle *nsm)
{
- struct sockaddr_in sin = {
- .sin_family = AF_INET,
- .sin_addr.s_addr = htonl(INADDR_LOOPBACK),
- .sin_port = 0,
- };
- struct rpc_create_args args = {
- .protocol = XPRT_TRANSPORT_UDP,
- .address = (struct sockaddr *)&sin,
- .addrsize = sizeof(sin),
- .servername = "localhost",
- .program = &nsm_program,
- .version = SM_VERSION,
- .authflavor = RPC_AUTH_NULL,
- };
+ u64 *p = (u64 *)&nsm->sm_priv.data;
+ struct timespec ts;
- return rpc_create(&args);
+ ktime_get_ts(&ts);
+ *p++ = timespec_to_ns(&ts);
+ *p = (unsigned long)nsm;
+}
+
+static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap,
+ const size_t salen,
+ const char *hostname,
+ const size_t hostname_len)
+{
+ struct nsm_handle *new;
+
+ new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL);
+ if (unlikely(new == NULL))
+ return NULL;
+
+ atomic_set(&new->sm_count, 1);
+ new->sm_name = (char *)(new + 1);
+ memcpy(nsm_addr(new), sap, salen);
+ new->sm_addrlen = salen;
+ nsm_init_private(new);
+ nsm_display_address((const struct sockaddr *)&new->sm_addr,
+ new->sm_addrbuf, sizeof(new->sm_addrbuf));
+ memcpy(new->sm_name, hostname, hostname_len);
+ new->sm_name[hostname_len] = '\0';
+
+ return new;
+}
+
+/**
+ * nsm_get_handle - Find or create a cached nsm_handle
+ * @sap: pointer to socket address of handle to find
+ * @salen: length of socket address
+ * @hostname: pointer to C string containing hostname to find
+ * @hostname_len: length of C string
+ *
+ * Behavior is modulated by the global nsm_use_hostnames variable.
+ *
+ * Returns a cached nsm_handle after bumping its ref count, or
+ * returns a fresh nsm_handle if a handle that matches @sap and/or
+ * @hostname cannot be found in the handle cache. Returns NULL if
+ * an error occurs.
+ */
+struct nsm_handle *nsm_get_handle(const struct sockaddr *sap,
+ const size_t salen, const char *hostname,
+ const size_t hostname_len)
+{
+ struct nsm_handle *cached, *new = NULL;
+
+ if (hostname && memchr(hostname, '/', hostname_len) != NULL) {
+ if (printk_ratelimit()) {
+ printk(KERN_WARNING "Invalid hostname \"%.*s\" "
+ "in NFS lock request\n",
+ (int)hostname_len, hostname);
+ }
+ return NULL;
+ }
+
+retry:
+ spin_lock(&nsm_lock);
+
+ if (nsm_use_hostnames && hostname != NULL)
+ cached = nsm_lookup_hostname(hostname, hostname_len);
+ else
+ cached = nsm_lookup_addr(sap);
+
+ if (cached != NULL) {
+ atomic_inc(&cached->sm_count);
+ spin_unlock(&nsm_lock);
+ kfree(new);
+ dprintk("lockd: found nsm_handle for %s (%s), "
+ "cnt %d\n", cached->sm_name,
+ cached->sm_addrbuf,
+ atomic_read(&cached->sm_count));
+ return cached;
+ }
+
+ if (new != NULL) {
+ list_add(&new->sm_link, &nsm_handles);
+ spin_unlock(&nsm_lock);
+ dprintk("lockd: created nsm_handle for %s (%s)\n",
+ new->sm_name, new->sm_addrbuf);
+ return new;
+ }
+
+ spin_unlock(&nsm_lock);
+
+ new = nsm_create_handle(sap, salen, hostname, hostname_len);
+ if (unlikely(new == NULL))
+ return NULL;
+ goto retry;
+}
+
+/**
+ * nsm_reboot_lookup - match NLMPROC_SM_NOTIFY arguments to an nsm_handle
+ * @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 and sm_monitored is cleared.
+ * Otherwise returns NULL if some error occurred.
+ */
+struct nsm_handle *nsm_reboot_lookup(const struct nlm_reboot *info)
+{
+ struct nsm_handle *cached;
+
+ spin_lock(&nsm_lock);
+
+ cached = nsm_lookup_priv(&info->priv);
+ if (unlikely(cached == NULL)) {
+ spin_unlock(&nsm_lock);
+ dprintk("lockd: never saw rebooted peer '%.*s' before\n",
+ info->len, info->mon);
+ return cached;
+ }
+
+ atomic_inc(&cached->sm_count);
+ spin_unlock(&nsm_lock);
+
+ /*
+ * During subsequent lock activity, force a fresh
+ * notification to be set up for this host.
+ */
+ cached->sm_monitored = 0;
+
+ dprintk("lockd: host %s (%s) rebooted, cnt %d\n",
+ cached->sm_name, cached->sm_addrbuf,
+ atomic_read(&cached->sm_count));
+ return cached;
+}
+
+/**
+ * nsm_release - Release an NSM handle
+ * @nsm: pointer to handle to be released
+ *
+ */
+void nsm_release(struct nsm_handle *nsm)
+{
+ if (atomic_dec_and_lock(&nsm->sm_count, &nsm_lock)) {
+ list_del(&nsm->sm_link);
+ spin_unlock(&nsm_lock);
+ dprintk("lockd: destroyed nsm_handle for %s (%s)\n",
+ nsm->sm_name, nsm->sm_addrbuf);
+ kfree(nsm);
+ }
}
/*
@@ -154,127 +428,132 @@ nsm_create(void)
* Status Monitor wire protocol.
*/
-static __be32 *xdr_encode_nsm_string(__be32 *p, char *string)
+static int encode_nsm_string(struct xdr_stream *xdr, const char *string)
{
- size_t len = strlen(string);
-
- if (len > SM_MAXSTRLEN)
- len = SM_MAXSTRLEN;
- return xdr_encode_opaque(p, string, len);
+ const u32 len = strlen(string);
+ __be32 *p;
+
+ if (unlikely(len > SM_MAXSTRLEN))
+ return -EIO;
+ p = xdr_reserve_space(xdr, sizeof(u32) + len);
+ if (unlikely(p == NULL))
+ return -EIO;
+ xdr_encode_opaque(p, string, len);
+ return 0;
}
/*
* "mon_name" specifies the host to be monitored.
- *
- * Linux uses a text version of the IP address of the remote
- * host as the host identifier (the "mon_name" argument).
- *
- * Linux statd always looks up the canonical hostname first for
- * whatever remote hostname it receives, so this works alright.
*/
-static __be32 *xdr_encode_mon_name(__be32 *p, struct nsm_args *argp)
+static int encode_mon_name(struct xdr_stream *xdr, const struct nsm_args *argp)
{
- char buffer[XDR_ADDRBUF_LEN + 1];
- char *name = argp->mon_name;
-
- if (!nsm_use_hostnames) {
- snprintf(buffer, XDR_ADDRBUF_LEN,
- "%pI4", &argp->addr);
- name = buffer;
- }
-
- return xdr_encode_nsm_string(p, name);
+ return encode_nsm_string(xdr, argp->mon_name);
}
/*
* The "my_id" argument specifies the hostname and RPC procedure
* to be called when the status manager receives notification
- * (via the SM_NOTIFY call) that the state of host "mon_name"
+ * (via the NLMPROC_SM_NOTIFY call) that the state of host "mon_name"
* has changed.
*/
-static __be32 *xdr_encode_my_id(__be32 *p, struct nsm_args *argp)
+static int encode_my_id(struct xdr_stream *xdr, const struct nsm_args *argp)
{
- p = xdr_encode_nsm_string(p, utsname()->nodename);
- if (!p)
- return ERR_PTR(-EIO);
-
+ int status;
+ __be32 *p;
+
+ status = encode_nsm_string(xdr, utsname()->nodename);
+ if (unlikely(status != 0))
+ return status;
+ p = xdr_reserve_space(xdr, 3 * sizeof(u32));
+ if (unlikely(p == NULL))
+ return -EIO;
*p++ = htonl(argp->prog);
*p++ = htonl(argp->vers);
*p++ = htonl(argp->proc);
-
- return p;
+ return 0;
}
/*
* The "mon_id" argument specifies the non-private arguments
- * of an SM_MON or SM_UNMON call.
+ * of an NSMPROC_MON or NSMPROC_UNMON call.
*/
-static __be32 *xdr_encode_mon_id(__be32 *p, struct nsm_args *argp)
+static int encode_mon_id(struct xdr_stream *xdr, const struct nsm_args *argp)
{
- p = xdr_encode_mon_name(p, argp);
- if (!p)
- return ERR_PTR(-EIO);
+ int status;
- return xdr_encode_my_id(p, argp);
+ status = encode_mon_name(xdr, argp);
+ if (unlikely(status != 0))
+ return status;
+ return encode_my_id(xdr, argp);
}
/*
* The "priv" argument may contain private information required
- * by the SM_MON call. This information will be supplied in the
- * SM_NOTIFY call.
- *
- * Linux provides the raw IP address of the monitored host,
- * left in network byte order.
+ * by the NSMPROC_MON call. This information will be supplied in the
+ * NLMPROC_SM_NOTIFY call.
*/
-static __be32 *xdr_encode_priv(__be32 *p, struct nsm_args *argp)
+static int encode_priv(struct xdr_stream *xdr, const struct nsm_args *argp)
{
- *p++ = argp->addr;
- *p++ = 0;
- *p++ = 0;
- *p++ = 0;
+ __be32 *p;
- return p;
+ p = xdr_reserve_space(xdr, SM_PRIV_SIZE);
+ if (unlikely(p == NULL))
+ return -EIO;
+ xdr_encode_opaque_fixed(p, argp->priv->data, SM_PRIV_SIZE);
+ return 0;
}
-static int
-xdr_encode_mon(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
+static int xdr_enc_mon(struct rpc_rqst *req, __be32 *p,
+ const struct nsm_args *argp)
{
- p = xdr_encode_mon_id(p, argp);
- if (IS_ERR(p))
- return PTR_ERR(p);
-
- p = xdr_encode_priv(p, argp);
- if (IS_ERR(p))
- return PTR_ERR(p);
-
- rqstp->rq_slen = xdr_adjust_iovec(rqstp->rq_svec, p);
- return 0;
+ struct xdr_stream xdr;
+ int status;
+
+ xdr_init_encode(&xdr, &req->rq_snd_buf, p);
+ status = encode_mon_id(&xdr, argp);
+ if (unlikely(status))
+ return status;
+ return encode_priv(&xdr, argp);
}
-static int
-xdr_encode_unmon(struct rpc_rqst *rqstp, __be32 *p, struct nsm_args *argp)
+static int xdr_enc_unmon(struct rpc_rqst *req, __be32 *p,
+ const struct nsm_args *argp)
{
- p = xdr_encode_mon_id(p, argp);
- if (IS_ERR(p))
- return PTR_ERR(p);
- rqstp->rq_slen = xdr_adjust_iovec(rqstp->rq_svec, p);
- return 0;
+ struct xdr_stream xdr;
+
+ xdr_init_encode(&xdr, &req->rq_snd_buf, p);
+ return encode_mon_id(&xdr, argp);
}
-static int
-xdr_decode_stat_res(struct rpc_rqst *rqstp, __be32 *p, struct nsm_res *resp)
+static int xdr_dec_stat_res(struct rpc_rqst *rqstp, __be32 *p,
+ struct nsm_res *resp)
{
+ struct xdr_stream xdr;
+
+ xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
+ p = xdr_inline_decode(&xdr, 2 * sizeof(u32));
+ if (unlikely(p == NULL))
+ return -EIO;
resp->status = ntohl(*p++);
- resp->state = ntohl(*p++);
- dprintk("nsm: xdr_decode_stat_res status %d state %d\n",
+ resp->state = ntohl(*p);
+
+ dprintk("lockd: xdr_dec_stat_res status %d state %d\n",
resp->status, resp->state);
return 0;
}
-static int
-xdr_decode_stat(struct rpc_rqst *rqstp, __be32 *p, struct nsm_res *resp)
+static int xdr_dec_stat(struct rpc_rqst *rqstp, __be32 *p,
+ struct nsm_res *resp)
{
- resp->state = ntohl(*p++);
+ struct xdr_stream xdr;
+
+ xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);
+ p = xdr_inline_decode(&xdr, sizeof(u32));
+ if (unlikely(p == NULL))
+ return -EIO;
+ resp->state = ntohl(*p);
+
+ dprintk("lockd: xdr_dec_stat state %d\n", resp->state);
return 0;
}
@@ -288,22 +567,22 @@ xdr_decode_stat(struct rpc_rqst *rqstp, __be32 *p, struct nsm_res *resp)
#define SM_unmonres_sz 1
static struct rpc_procinfo nsm_procedures[] = {
-[SM_MON] = {
- .p_proc = SM_MON,
- .p_encode = (kxdrproc_t) xdr_encode_mon,
- .p_decode = (kxdrproc_t) xdr_decode_stat_res,
+[NSMPROC_MON] = {
+ .p_proc = NSMPROC_MON,
+ .p_encode = (kxdrproc_t)xdr_enc_mon,
+ .p_decode = (kxdrproc_t)xdr_dec_stat_res,
.p_arglen = SM_mon_sz,
.p_replen = SM_monres_sz,
- .p_statidx = SM_MON,
+ .p_statidx = NSMPROC_MON,
.p_name = "MONITOR",
},
-[SM_UNMON] = {
- .p_proc = SM_UNMON,
- .p_encode = (kxdrproc_t) xdr_encode_unmon,
- .p_decode = (kxdrproc_t) xdr_decode_stat,
+[NSMPROC_UNMON] = {
+ .p_proc = NSMPROC_UNMON,
+ .p_encode = (kxdrproc_t)xdr_enc_unmon,
+ .p_decode = (kxdrproc_t)xdr_dec_stat,
.p_arglen = SM_mon_id_sz,
.p_replen = SM_unmonres_sz,
- .p_statidx = SM_UNMON,
+ .p_statidx = NSMPROC_UNMON,
.p_name = "UNMONITOR",
},
};
@@ -322,7 +601,7 @@ static struct rpc_stat nsm_stats;
static struct rpc_program nsm_program = {
.name = "statd",
- .number = SM_PROGRAM,
+ .number = NSM_PROGRAM,
.nrvers = ARRAY_SIZE(nsm_version),
.version = nsm_version,
.stats = &nsm_stats
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 252d80163d0..64f1c31b585 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -35,7 +35,6 @@
#include <linux/sunrpc/svcsock.h>
#include <net/ip.h>
#include <linux/lockd/lockd.h>
-#include <linux/lockd/sm_inter.h>
#include <linux/nfs.h>
#define NLMDBG_FACILITY NLMDBG_SVC
@@ -54,13 +53,26 @@ static struct svc_rqst *nlmsvc_rqst;
unsigned long nlmsvc_timeout;
/*
+ * If the kernel has IPv6 support available, always listen for
+ * both AF_INET and AF_INET6 requests.
+ */
+#if (defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)) && \
+ defined(CONFIG_SUNRPC_REGISTER_V4)
+static const sa_family_t nlmsvc_family = AF_INET6;
+#else /* (CONFIG_IPV6 || CONFIG_IPV6_MODULE) && CONFIG_SUNRPC_REGISTER_V4 */
+static const sa_family_t nlmsvc_family = AF_INET;
+#endif /* (CONFIG_IPV6 || CONFIG_IPV6_MODULE) && CONFIG_SUNRPC_REGISTER_V4 */
+
+/*
* These can be set at insmod time (useful for NFS as root filesystem),
* and also changed through the sysctl interface. -- Jamie Lokier, Aug 2003
*/
static unsigned long nlm_grace_period;
static unsigned long nlm_timeout = LOCKD_DFLT_TIMEO;
static int nlm_udpport, nlm_tcpport;
-int nsm_use_hostnames = 0;
+
+/* RLIM_NOFILE defaults to 1024. That seems like a reasonable default here. */
+static unsigned int nlm_max_connections = 1024;
/*
* Constants needed for the sysctl interface.
@@ -143,6 +155,9 @@ lockd(void *vrqstp)
long timeout = MAX_SCHEDULE_TIMEOUT;
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
+ /* update sv_maxconn if it has changed */
+ rqstp->rq_server->sv_maxconn = nlm_max_connections;
+
if (signalled()) {
flush_signals(current);
if (nlmsvc_ops) {
@@ -189,6 +204,19 @@ lockd(void *vrqstp)
return 0;
}
+static int create_lockd_listener(struct svc_serv *serv, char *name,
+ unsigned short port)
+{
+ struct svc_xprt *xprt;
+
+ xprt = svc_find_xprt(serv, name, 0, 0);
+ if (xprt == NULL)
+ return svc_create_xprt(serv, name, port, SVC_SOCK_DEFAULTS);
+
+ svc_xprt_put(xprt);
+ return 0;
+}
+
/*
* Ensure there are active UDP and TCP listeners for lockd.
*
@@ -202,29 +230,23 @@ lockd(void *vrqstp)
static int make_socks(struct svc_serv *serv)
{
static int warned;
- struct svc_xprt *xprt;
- int err = 0;
+ int err;
- xprt = svc_find_xprt(serv, "udp", 0, 0);
- if (!xprt)
- err = svc_create_xprt(serv, "udp", nlm_udpport,
- SVC_SOCK_DEFAULTS);
- else
- svc_xprt_put(xprt);
- if (err >= 0) {
- xprt = svc_find_xprt(serv, "tcp", 0, 0);
- if (!xprt)
- err = svc_create_xprt(serv, "tcp", nlm_tcpport,
- SVC_SOCK_DEFAULTS);
- else
- svc_xprt_put(xprt);
- }
- if (err >= 0) {
- warned = 0;
- err = 0;
- } else if (warned++ == 0)
+ err = create_lockd_listener(serv, "udp", nlm_udpport);
+ if (err < 0)
+ goto out_err;
+
+ err = create_lockd_listener(serv, "tcp", nlm_tcpport);
+ if (err < 0)
+ goto out_err;
+
+ warned = 0;
+ return 0;
+
+out_err:
+ if (warned++ == 0)
printk(KERN_WARNING
- "lockd_up: makesock failed, error=%d\n", err);
+ "lockd_up: makesock failed, error=%d\n", err);
return err;
}
@@ -252,7 +274,7 @@ int lockd_up(void)
"lockd_up: no pid, %d users??\n", nlmsvc_users);
error = -ENOMEM;
- serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, AF_INET, NULL);
+ serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, nlmsvc_family, NULL);
if (!serv) {
printk(KERN_WARNING "lockd_up: create service failed\n");
goto out;
@@ -276,6 +298,7 @@ int lockd_up(void)
}
svc_sock_update_bufs(serv);
+ serv->sv_maxconn = nlm_max_connections;
nlmsvc_task = kthread_run(lockd, nlmsvc_rqst, serv->sv_name);
if (IS_ERR(nlmsvc_task)) {
@@ -485,6 +508,7 @@ module_param_call(nlm_udpport, param_set_port, param_get_int,
module_param_call(nlm_tcpport, param_set_port, param_get_int,
&nlm_tcpport, 0644);
module_param(nsm_use_hostnames, bool, 0644);
+module_param(nlm_max_connections, uint, 0644);
/*
* Initialising and terminating the module.
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index 4dfdcbc6bf6..1725037374c 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -16,8 +16,6 @@
#include <linux/nfsd/nfsd.h>
#include <linux/lockd/lockd.h>
#include <linux/lockd/share.h>
-#include <linux/lockd/sm_inter.h>
-
#define NLMDBG_FACILITY NLMDBG_CLIENT
@@ -419,8 +417,6 @@ static __be32
nlm4svc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
void *resp)
{
- struct sockaddr_in saddr;
-
dprintk("lockd: SM_NOTIFY called\n");
if (!nlm_privileged_requester(rqstp)) {
@@ -430,14 +426,7 @@ nlm4svc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
return rpc_system_err;
}
- /* Obtain the host pointer for this NFS server and try to
- * reclaim all locks we hold on this server.
- */
- memset(&saddr, 0, sizeof(saddr));
- saddr.sin_family = AF_INET;
- saddr.sin_addr.s_addr = argp->addr;
- nlm_host_rebooted(&saddr, argp->mon, argp->len, argp->state);
-
+ nlm_host_rebooted(argp);
return rpc_success;
}
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index 3ca89e2a938..3688e55901f 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -16,8 +16,6 @@
#include <linux/nfsd/nfsd.h>
#include <linux/lockd/lockd.h>
#include <linux/lockd/share.h>
-#include <linux/lockd/sm_inter.h>
-
#define NLMDBG_FACILITY NLMDBG_CLIENT
@@ -451,8 +449,6 @@ static __be32
nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
void *resp)
{
- struct sockaddr_in saddr;
-
dprintk("lockd: SM_NOTIFY called\n");
if (!nlm_privileged_requester(rqstp)) {
@@ -462,14 +458,7 @@ nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
return rpc_system_err;
}
- /* Obtain the host pointer for this NFS server and try to
- * reclaim all locks we hold on this server.
- */
- memset(&saddr, 0, sizeof(saddr));
- saddr.sin_family = AF_INET;
- saddr.sin_addr.s_addr = argp->addr;
- nlm_host_rebooted(&saddr, argp->mon, argp->len, argp->state);
-
+ nlm_host_rebooted(argp);
return rpc_success;
}
diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c
index 34c2766e27c..9e4d6aab611 100644
--- a/fs/lockd/svcsubs.c
+++ b/fs/lockd/svcsubs.c
@@ -17,7 +17,6 @@
#include <linux/nfsd/export.h>
#include <linux/lockd/lockd.h>
#include <linux/lockd/share.h>
-#include <linux/lockd/sm_inter.h>
#include <linux/module.h>
#include <linux/mount.h>
diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 1f226290c67..0336f2beacd 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -16,7 +16,6 @@
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/stats.h>
#include <linux/lockd/lockd.h>
-#include <linux/lockd/sm_inter.h>
#define NLMDBG_FACILITY NLMDBG_XDR
@@ -349,8 +348,8 @@ nlmsvc_decode_reboot(struct svc_rqst *rqstp, __be32 *p, struct nlm_reboot *argp)
if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
return 0;
argp->state = ntohl(*p++);
- /* Preserve the address in network byte order */
- argp->addr = *p++;
+ memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
+ p += XDR_QUADLEN(SM_PRIV_SIZE);
return xdr_argsize_check(rqstp, p);
}
diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c
index 50c493a8ad8..e1d52865319 100644
--- a/fs/lockd/xdr4.c
+++ b/fs/lockd/xdr4.c
@@ -17,7 +17,6 @@
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/stats.h>
#include <linux/lockd/lockd.h>
-#include <linux/lockd/sm_inter.h>
#define NLMDBG_FACILITY NLMDBG_XDR
@@ -356,8 +355,8 @@ nlm4svc_decode_reboot(struct svc_rqst *rqstp, __be32 *p, struct nlm_reboot *argp
if (!(p = xdr_decode_string_inplace(p, &argp->mon, &argp->len, SM_MAXSTRLEN)))
return 0;
argp->state = ntohl(*p++);
- /* Preserve the address in network byte order */
- argp->addr = *p++;
+ memcpy(&argp->priv.data, p, sizeof(argp->priv.data));
+ p += XDR_QUADLEN(SM_PRIV_SIZE);
return xdr_argsize_check(rqstp, p);
}