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Diffstat (limited to 'fs/nfsd/nfssvc.c')
-rw-r--r--fs/nfsd/nfssvc.c151
1 files changed, 95 insertions, 56 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 06b2a26edfe..e2c43464f23 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -180,15 +180,80 @@ int nfsd_nrthreads(void)
return rv;
}
+static int nfsd_init_socks(int port)
+{
+ int error;
+ if (!list_empty(&nfsd_serv->sv_permsocks))
+ return 0;
+
+ error = svc_create_xprt(nfsd_serv, "udp", PF_INET, port,
+ SVC_SOCK_DEFAULTS);
+ if (error < 0)
+ return error;
+
+ error = svc_create_xprt(nfsd_serv, "tcp", PF_INET, port,
+ SVC_SOCK_DEFAULTS);
+ if (error < 0)
+ return error;
+
+ return 0;
+}
+
+static bool nfsd_up = false;
+
+static int nfsd_startup(unsigned short port, int nrservs)
+{
+ int ret;
+
+ if (nfsd_up)
+ return 0;
+ /*
+ * Readahead param cache - will no-op if it already exists.
+ * (Note therefore results will be suboptimal if number of
+ * threads is modified after nfsd start.)
+ */
+ ret = nfsd_racache_init(2*nrservs);
+ if (ret)
+ return ret;
+ ret = nfsd_init_socks(port);
+ if (ret)
+ goto out_racache;
+ ret = lockd_up();
+ if (ret)
+ goto out_racache;
+ ret = nfs4_state_start();
+ if (ret)
+ goto out_lockd;
+ nfsd_up = true;
+ return 0;
+out_lockd:
+ lockd_down();
+out_racache:
+ nfsd_racache_shutdown();
+ return ret;
+}
+
+static void nfsd_shutdown(void)
+{
+ /*
+ * 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)
+ return;
+ nfs4_state_shutdown();
+ lockd_down();
+ nfsd_racache_shutdown();
+ nfsd_up = false;
+}
+
static void nfsd_last_thread(struct svc_serv *serv)
{
/* When last nfsd thread exits we need to do some clean-up */
- struct svc_xprt *xprt;
- list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list)
- lockd_down();
nfsd_serv = NULL;
- nfsd_racache_shutdown();
- nfs4_state_shutdown();
+ nfsd_shutdown();
printk(KERN_WARNING "nfsd: last server has exited, flushing export "
"cache\n");
@@ -263,45 +328,18 @@ int nfsd_create_serv(void)
nfsd_max_blksize >= 8*1024*2)
nfsd_max_blksize /= 2;
}
+ nfsd_reset_versions();
nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
nfsd_last_thread, nfsd, THIS_MODULE);
if (nfsd_serv == NULL)
- err = -ENOMEM;
- else
- set_max_drc();
+ return -ENOMEM;
+ set_max_drc();
do_gettimeofday(&nfssvc_boot); /* record boot time */
return err;
}
-static int nfsd_init_socks(int port)
-{
- int error;
- if (!list_empty(&nfsd_serv->sv_permsocks))
- return 0;
-
- error = svc_create_xprt(nfsd_serv, "udp", PF_INET, port,
- SVC_SOCK_DEFAULTS);
- if (error < 0)
- return error;
-
- error = lockd_up();
- if (error < 0)
- return error;
-
- error = svc_create_xprt(nfsd_serv, "tcp", PF_INET, port,
- SVC_SOCK_DEFAULTS);
- if (error < 0)
- return error;
-
- error = lockd_up();
- if (error < 0)
- return error;
-
- return 0;
-}
-
int nfsd_nrpools(void)
{
if (nfsd_serv == NULL)
@@ -376,10 +414,16 @@ int nfsd_set_nrthreads(int n, int *nthreads)
return err;
}
+/*
+ * Adjust the number of threads and return the new number of threads.
+ * This is also the function that starts the server if necessary, if
+ * this is the first time nrservs is nonzero.
+ */
int
nfsd_svc(unsigned short port, int nrservs)
{
int error;
+ bool nfsd_up_before;
mutex_lock(&nfsd_mutex);
dprintk("nfsd: creating service\n");
@@ -391,34 +435,29 @@ nfsd_svc(unsigned short port, int nrservs)
if (nrservs == 0 && nfsd_serv == NULL)
goto out;
- /* Readahead param cache - will no-op if it already exists */
- error = nfsd_racache_init(2*nrservs);
- if (error<0)
- goto out;
- error = nfs4_state_start();
+ error = nfsd_create_serv();
if (error)
goto out;
- nfsd_reset_versions();
-
- error = nfsd_create_serv();
+ nfsd_up_before = nfsd_up;
+ error = nfsd_startup(port, nrservs);
if (error)
- goto out;
- error = nfsd_init_socks(port);
- if (error)
- goto failure;
-
+ goto out_destroy;
error = svc_set_num_threads(nfsd_serv, NULL, nrservs);
- if (error == 0)
- /* We are holding a reference to nfsd_serv which
- * we don't want to count in the return value,
- * so subtract 1
- */
- error = nfsd_serv->sv_nrthreads - 1;
- failure:
+ if (error)
+ goto out_shutdown;
+ /* We are holding a reference to nfsd_serv which
+ * we don't want to count in the return value,
+ * so subtract 1
+ */
+ error = nfsd_serv->sv_nrthreads - 1;
+out_shutdown:
+ if (error < 0 && !nfsd_up_before)
+ nfsd_shutdown();
+out_destroy:
svc_destroy(nfsd_serv); /* Release server */
- out:
+out:
mutex_unlock(&nfsd_mutex);
return error;
}