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Diffstat (limited to 'fs/nfsd/nfssvc.c')
-rw-r--r--fs/nfsd/nfssvc.c233
1 files changed, 137 insertions, 96 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index ee709fc8f58..cee62ab9d4a 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -11,7 +11,6 @@
#include <linux/module.h>
#include <linux/fs_struct.h>
#include <linux/swap.h>
-#include <linux/nsproxy.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/svcsock.h>
@@ -22,19 +21,19 @@
#include "nfsd.h"
#include "cache.h"
#include "vfs.h"
+#include "netns.h"
#define NFSDDBG_FACILITY NFSDDBG_SVC
extern struct svc_program nfsd_program;
static int nfsd(void *vrqstp);
-struct timeval nfssvc_boot;
/*
- * nfsd_mutex protects nfsd_serv -- both the pointer itself and the members
+ * nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members
* of the svc_serv struct. In particular, ->sv_nrthreads but also to some
* extent ->sv_temp_socks and ->sv_permsocks. It also protects nfsdstats.th_cnt
*
- * If (out side the lock) nfsd_serv is non-NULL, then it must point to a
+ * If (out side the lock) nn->nfsd_serv is non-NULL, then it must point to a
* properly initialised 'struct svc_serv' with ->sv_nrthreads > 0. That number
* of nfsd threads must exist and each must listed in ->sp_all_threads in each
* entry of ->sv_pools[].
@@ -52,7 +51,6 @@ struct timeval nfssvc_boot;
* nfsd_versions
*/
DEFINE_MUTEX(nfsd_mutex);
-struct svc_serv *nfsd_serv;
/*
* nfsd_drc_lock protects nfsd_drc_max_pages and nfsd_drc_pages_used.
@@ -173,28 +171,32 @@ int nfsd_minorversion(u32 minorversion, enum vers_op change)
*/
#define NFSD_MAXSERVS 8192
-int nfsd_nrthreads(void)
+int nfsd_nrthreads(struct net *net)
{
int rv = 0;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
mutex_lock(&nfsd_mutex);
- if (nfsd_serv)
- rv = nfsd_serv->sv_nrthreads;
+ if (nn->nfsd_serv)
+ rv = nn->nfsd_serv->sv_nrthreads;
mutex_unlock(&nfsd_mutex);
return rv;
}
-static int nfsd_init_socks(int port)
+static int nfsd_init_socks(struct net *net)
{
int error;
- if (!list_empty(&nfsd_serv->sv_permsocks))
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ if (!list_empty(&nn->nfsd_serv->sv_permsocks))
return 0;
- error = svc_create_xprt(nfsd_serv, "udp", &init_net, PF_INET, port,
+ error = svc_create_xprt(nn->nfsd_serv, "udp", net, PF_INET, NFS_PORT,
SVC_SOCK_DEFAULTS);
if (error < 0)
return error;
- error = svc_create_xprt(nfsd_serv, "tcp", &init_net, PF_INET, port,
+ error = svc_create_xprt(nn->nfsd_serv, "tcp", net, PF_INET, NFS_PORT,
SVC_SOCK_DEFAULTS);
if (error < 0)
return error;
@@ -202,14 +204,15 @@ static int nfsd_init_socks(int port)
return 0;
}
-static bool nfsd_up = false;
+static int nfsd_users = 0;
-static int nfsd_startup(unsigned short port, int nrservs)
+static int nfsd_startup_generic(int nrservs)
{
int ret;
- if (nfsd_up)
+ if (nfsd_users++)
return 0;
+
/*
* Readahead param cache - will no-op if it already exists.
* (Note therefore results will be suboptimal if number of
@@ -218,45 +221,79 @@ static int nfsd_startup(unsigned short port, int nrservs)
ret = nfsd_racache_init(2*nrservs);
if (ret)
return ret;
- ret = nfsd_init_socks(port);
+ ret = nfs4_state_start();
if (ret)
goto out_racache;
- ret = lockd_up(&init_net);
+ return 0;
+
+out_racache:
+ nfsd_racache_shutdown();
+ return ret;
+}
+
+static void nfsd_shutdown_generic(void)
+{
+ if (--nfsd_users)
+ return;
+
+ nfs4_state_shutdown();
+ nfsd_racache_shutdown();
+}
+
+static int nfsd_startup_net(int nrservs, struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ int ret;
+
+ if (nn->nfsd_net_up)
+ return 0;
+
+ ret = nfsd_startup_generic(nrservs);
if (ret)
- goto out_racache;
- ret = nfs4_state_start();
+ return ret;
+ ret = nfsd_init_socks(net);
+ if (ret)
+ goto out_socks;
+ ret = lockd_up(net);
+ if (ret)
+ goto out_socks;
+ ret = nfs4_state_start_net(net);
if (ret)
goto out_lockd;
- nfsd_up = true;
+
+ nn->nfsd_net_up = true;
return 0;
+
out_lockd:
- lockd_down(&init_net);
-out_racache:
- nfsd_racache_shutdown();
+ lockd_down(net);
+out_socks:
+ nfsd_shutdown_generic();
return ret;
}
-static void nfsd_shutdown(void)
+static void nfsd_shutdown_net(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ nfs4_state_shutdown_net(net);
+ lockd_down(net);
+ nn->nfsd_net_up = false;
+ nfsd_shutdown_generic();
+}
+
+static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
/*
* write_ports can create the server without actually starting
* any threads--if we get shut down before any threads are
* started, then nfsd_last_thread will be run before any of this
* other initialization has been done.
*/
- if (!nfsd_up)
+ if (!nn->nfsd_net_up)
return;
- nfs4_state_shutdown();
- lockd_down(&init_net);
- nfsd_racache_shutdown();
- nfsd_up = false;
-}
-
-static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
-{
- /* When last nfsd thread exits we need to do some clean-up */
- nfsd_serv = NULL;
- nfsd_shutdown();
+ nfsd_shutdown_net(net);
svc_rpcb_cleanup(serv, net);
@@ -329,68 +366,84 @@ static int nfsd_get_default_max_blksize(void)
return ret;
}
-int nfsd_create_serv(void)
+int nfsd_create_serv(struct net *net)
{
int error;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
WARN_ON(!mutex_is_locked(&nfsd_mutex));
- if (nfsd_serv) {
- svc_get(nfsd_serv);
+ if (nn->nfsd_serv) {
+ svc_get(nn->nfsd_serv);
return 0;
}
if (nfsd_max_blksize == 0)
nfsd_max_blksize = nfsd_get_default_max_blksize();
nfsd_reset_versions();
- nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
+ nn->nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
nfsd_last_thread, nfsd, THIS_MODULE);
- if (nfsd_serv == NULL)
+ if (nn->nfsd_serv == NULL)
return -ENOMEM;
- error = svc_bind(nfsd_serv, current->nsproxy->net_ns);
+ error = svc_bind(nn->nfsd_serv, net);
if (error < 0) {
- svc_destroy(nfsd_serv);
+ svc_destroy(nn->nfsd_serv);
return error;
}
set_max_drc();
- do_gettimeofday(&nfssvc_boot); /* record boot time */
+ do_gettimeofday(&nn->nfssvc_boot); /* record boot time */
return 0;
}
-int nfsd_nrpools(void)
+int nfsd_nrpools(struct net *net)
{
- if (nfsd_serv == NULL)
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ if (nn->nfsd_serv == NULL)
return 0;
else
- return nfsd_serv->sv_nrpools;
+ return nn->nfsd_serv->sv_nrpools;
}
-int nfsd_get_nrthreads(int n, int *nthreads)
+int nfsd_get_nrthreads(int n, int *nthreads, struct net *net)
{
int i = 0;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
- if (nfsd_serv != NULL) {
- for (i = 0; i < nfsd_serv->sv_nrpools && i < n; i++)
- nthreads[i] = nfsd_serv->sv_pools[i].sp_nrthreads;
+ if (nn->nfsd_serv != NULL) {
+ for (i = 0; i < nn->nfsd_serv->sv_nrpools && i < n; i++)
+ nthreads[i] = nn->nfsd_serv->sv_pools[i].sp_nrthreads;
}
return 0;
}
-int nfsd_set_nrthreads(int n, int *nthreads)
+void nfsd_destroy(struct net *net)
+{
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+ int destroy = (nn->nfsd_serv->sv_nrthreads == 1);
+
+ if (destroy)
+ svc_shutdown_net(nn->nfsd_serv, net);
+ svc_destroy(nn->nfsd_serv);
+ if (destroy)
+ nn->nfsd_serv = NULL;
+}
+
+int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
{
int i = 0;
int tot = 0;
int err = 0;
- struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
WARN_ON(!mutex_is_locked(&nfsd_mutex));
- if (nfsd_serv == NULL || n <= 0)
+ if (nn->nfsd_serv == NULL || n <= 0)
return 0;
- if (n > nfsd_serv->sv_nrpools)
- n = nfsd_serv->sv_nrpools;
+ if (n > nn->nfsd_serv->sv_nrpools)
+ n = nn->nfsd_serv->sv_nrpools;
/* enforce a global maximum number of threads */
tot = 0;
@@ -420,18 +473,14 @@ int nfsd_set_nrthreads(int n, int *nthreads)
nthreads[0] = 1;
/* apply the new numbers */
- svc_get(nfsd_serv);
+ svc_get(nn->nfsd_serv);
for (i = 0; i < n; i++) {
- err = svc_set_num_threads(nfsd_serv, &nfsd_serv->sv_pools[i],
+ err = svc_set_num_threads(nn->nfsd_serv, &nn->nfsd_serv->sv_pools[i],
nthreads[i]);
if (err)
break;
}
-
- if (nfsd_serv->sv_nrthreads == 1)
- svc_shutdown_net(nfsd_serv, net);
- svc_destroy(nfsd_serv);
-
+ nfsd_destroy(net);
return err;
}
@@ -441,11 +490,11 @@ int nfsd_set_nrthreads(int n, int *nthreads)
* this is the first time nrservs is nonzero.
*/
int
-nfsd_svc(unsigned short port, int nrservs)
+nfsd_svc(int nrservs, struct net *net)
{
int error;
bool nfsd_up_before;
- struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
mutex_lock(&nfsd_mutex);
dprintk("nfsd: creating service\n");
@@ -454,33 +503,31 @@ nfsd_svc(unsigned short port, int nrservs)
if (nrservs > NFSD_MAXSERVS)
nrservs = NFSD_MAXSERVS;
error = 0;
- if (nrservs == 0 && nfsd_serv == NULL)
+ if (nrservs == 0 && nn->nfsd_serv == NULL)
goto out;
- error = nfsd_create_serv();
+ error = nfsd_create_serv(net);
if (error)
goto out;
- nfsd_up_before = nfsd_up;
+ nfsd_up_before = nn->nfsd_net_up;
- error = nfsd_startup(port, nrservs);
+ error = nfsd_startup_net(nrservs, net);
if (error)
goto out_destroy;
- error = svc_set_num_threads(nfsd_serv, NULL, nrservs);
+ error = svc_set_num_threads(nn->nfsd_serv, NULL, nrservs);
if (error)
goto out_shutdown;
- /* We are holding a reference to nfsd_serv which
+ /* We are holding a reference to nn->nfsd_serv which
* we don't want to count in the return value,
* so subtract 1
*/
- error = nfsd_serv->sv_nrthreads - 1;
+ error = nn->nfsd_serv->sv_nrthreads - 1;
out_shutdown:
if (error < 0 && !nfsd_up_before)
- nfsd_shutdown();
+ nfsd_shutdown_net(net);
out_destroy:
- if (nfsd_serv->sv_nrthreads == 1)
- svc_shutdown_net(nfsd_serv, net);
- svc_destroy(nfsd_serv); /* Release server */
+ nfsd_destroy(net); /* Release server */
out:
mutex_unlock(&nfsd_mutex);
return error;
@@ -494,7 +541,9 @@ static int
nfsd(void *vrqstp)
{
struct svc_rqst *rqstp = (struct svc_rqst *) vrqstp;
- int err, preverr = 0;
+ struct svc_xprt *perm_sock = list_entry(rqstp->rq_server->sv_permsocks.next, typeof(struct svc_xprt), xpt_list);
+ struct net *net = perm_sock->xpt_net;
+ int err;
/* Lock module and set up kernel thread */
mutex_lock(&nfsd_mutex);
@@ -541,16 +590,6 @@ nfsd(void *vrqstp)
;
if (err == -EINTR)
break;
- else if (err < 0) {
- if (err != preverr) {
- printk(KERN_WARNING "%s: unexpected error "
- "from svc_recv (%d)\n", __func__, -err);
- preverr = err;
- }
- schedule_timeout_uninterruptible(HZ);
- continue;
- }
-
validate_process_creds();
svc_process(rqstp);
validate_process_creds();
@@ -563,12 +602,13 @@ nfsd(void *vrqstp)
nfsdstats.th_cnt --;
out:
- if (rqstp->rq_server->sv_nrthreads == 1)
- svc_shutdown_net(rqstp->rq_server, &init_net);
+ rqstp->rq_server = NULL;
/* Release the thread */
svc_exit_thread(rqstp);
+ nfsd_destroy(net);
+
/* Release module */
mutex_unlock(&nfsd_mutex);
module_put_and_exit(0);
@@ -656,21 +696,24 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
}
/* Store reply in cache. */
- nfsd_cache_update(rqstp, proc->pc_cachetype, statp + 1);
+ nfsd_cache_update(rqstp, rqstp->rq_cachetype, statp + 1);
return 1;
}
int nfsd_pool_stats_open(struct inode *inode, struct file *file)
{
int ret;
+ struct net *net = &init_net;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
mutex_lock(&nfsd_mutex);
- if (nfsd_serv == NULL) {
+ if (nn->nfsd_serv == NULL) {
mutex_unlock(&nfsd_mutex);
return -ENODEV;
}
/* bump up the psudo refcount while traversing */
- svc_get(nfsd_serv);
- ret = svc_pool_stats_open(nfsd_serv, file);
+ svc_get(nn->nfsd_serv);
+ ret = svc_pool_stats_open(nn->nfsd_serv, file);
mutex_unlock(&nfsd_mutex);
return ret;
}
@@ -682,9 +725,7 @@ int nfsd_pool_stats_release(struct inode *inode, struct file *file)
mutex_lock(&nfsd_mutex);
/* this function really, really should have been called svc_put() */
- if (nfsd_serv->sv_nrthreads == 1)
- svc_shutdown_net(nfsd_serv, net);
- svc_destroy(nfsd_serv);
+ nfsd_destroy(net);
mutex_unlock(&nfsd_mutex);
return ret;
}