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-rw-r--r--fs/nfs/filelayout/filelayoutdev.c78
-rw-r--r--fs/nfs/pnfs.h3
-rw-r--r--fs/nfs/pnfs_nfs.c81
3 files changed, 89 insertions, 73 deletions
diff --git a/fs/nfs/filelayout/filelayoutdev.c b/fs/nfs/filelayout/filelayoutdev.c
index c7f6041a287f..27bdd8ce177e 100644
--- a/fs/nfs/filelayout/filelayoutdev.c
+++ b/fs/nfs/filelayout/filelayoutdev.c
@@ -41,51 +41,6 @@
static unsigned int dataserver_timeo = NFS4_DEF_DS_TIMEO;
static unsigned int dataserver_retrans = NFS4_DEF_DS_RETRANS;
-/*
- * Create an rpc connection to the nfs4_pnfs_ds data server
- * Currently only supports IPv4 and IPv6 addresses
- */
-static int
-nfs4_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds)
-{
- struct nfs_client *clp = ERR_PTR(-EIO);
- struct nfs4_pnfs_ds_addr *da;
- int status = 0;
-
- dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr,
- mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor);
-
- list_for_each_entry(da, &ds->ds_addrs, da_node) {
- dprintk("%s: DS %s: trying address %s\n",
- __func__, ds->ds_remotestr, da->da_remotestr);
-
- clp = nfs4_set_ds_client(mds_srv->nfs_client,
- (struct sockaddr *)&da->da_addr,
- da->da_addrlen, IPPROTO_TCP,
- dataserver_timeo, dataserver_retrans);
- if (!IS_ERR(clp))
- break;
- }
-
- if (IS_ERR(clp)) {
- status = PTR_ERR(clp);
- goto out;
- }
-
- status = nfs4_init_ds_session(clp, mds_srv->nfs_client->cl_lease_time);
- if (status)
- goto out_put;
-
- smp_wmb();
- ds->ds_clp = clp;
- dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
-out:
- return status;
-out_put:
- nfs_put_client(clp);
- goto out;
-}
-
void
nfs4_fl_free_deviceid(struct nfs4_file_layout_dsaddr *dsaddr)
{
@@ -302,22 +257,7 @@ nfs4_fl_select_ds_fh(struct pnfs_layout_segment *lseg, u32 j)
return flseg->fh_array[i];
}
-static void nfs4_wait_ds_connect(struct nfs4_pnfs_ds *ds)
-{
- might_sleep();
- wait_on_bit_action(&ds->ds_state, NFS4DS_CONNECTING,
- nfs_wait_bit_killable, TASK_KILLABLE);
-}
-
-static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds)
-{
- smp_mb__before_atomic();
- clear_bit(NFS4DS_CONNECTING, &ds->ds_state);
- smp_mb__after_atomic();
- wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING);
-}
-
-
+/* Upon return, either ds is connected, or ds is NULL */
struct nfs4_pnfs_ds *
nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx)
{
@@ -325,6 +265,7 @@ nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx)
struct nfs4_pnfs_ds *ds = dsaddr->ds_list[ds_idx];
struct nfs4_deviceid_node *devid = FILELAYOUT_DEVID_NODE(lseg);
struct nfs4_pnfs_ds *ret = ds;
+ struct nfs_server *s = NFS_SERVER(lseg->pls_layout->plh_inode);
if (ds == NULL) {
printk(KERN_ERR "NFS: %s: No data server for offset index %d\n",
@@ -336,18 +277,9 @@ nfs4_fl_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx)
if (ds->ds_clp)
goto out_test_devid;
- if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
- struct nfs_server *s = NFS_SERVER(lseg->pls_layout->plh_inode);
- int err;
-
- err = nfs4_ds_connect(s, ds);
- if (err)
- nfs4_mark_deviceid_unavailable(devid);
- nfs4_clear_ds_conn_bit(ds);
- } else {
- /* Either ds is connected, or ds is NULL */
- nfs4_wait_ds_connect(ds);
- }
+ nfs4_pnfs_ds_connect(s, ds, devid, dataserver_timeo,
+ dataserver_retrans);
+
out_test_devid:
if (filelayout_test_devid_unavailable(devid))
ret = NULL;
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 403d7bb67c41..9a8937c31d97 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -312,6 +312,9 @@ void pnfs_generic_write_commit_done(struct rpc_task *task, void *data);
void nfs4_pnfs_ds_put(struct nfs4_pnfs_ds *ds);
struct nfs4_pnfs_ds *nfs4_pnfs_ds_add(struct list_head *dsaddrs,
gfp_t gfp_flags);
+void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
+ struct nfs4_deviceid_node *devid, unsigned int timeo,
+ unsigned int retrans);
struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
struct xdr_stream *xdr,
gfp_t gfp_flags);
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
index 81ec449138a8..5a92e76c6c53 100644
--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -11,6 +11,7 @@
#include <linux/nfs_page.h>
#include <linux/sunrpc/addr.h>
+#include "nfs4session.h"
#include "internal.h"
#include "pnfs.h"
@@ -534,6 +535,86 @@ out:
}
EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_add);
+static void nfs4_wait_ds_connect(struct nfs4_pnfs_ds *ds)
+{
+ might_sleep();
+ wait_on_bit(&ds->ds_state, NFS4DS_CONNECTING,
+ TASK_KILLABLE);
+}
+
+static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds)
+{
+ smp_mb__before_atomic();
+ clear_bit(NFS4DS_CONNECTING, &ds->ds_state);
+ smp_mb__after_atomic();
+ wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING);
+}
+
+static int _nfs4_pnfs_ds_connect(struct nfs_server *mds_srv,
+ struct nfs4_pnfs_ds *ds,
+ unsigned int timeo,
+ unsigned int retrans)
+{
+ struct nfs_client *clp = ERR_PTR(-EIO);
+ struct nfs4_pnfs_ds_addr *da;
+ int status = 0;
+
+ dprintk("--> %s DS %s au_flavor %d\n", __func__, ds->ds_remotestr,
+ mds_srv->nfs_client->cl_rpcclient->cl_auth->au_flavor);
+
+ list_for_each_entry(da, &ds->ds_addrs, da_node) {
+ dprintk("%s: DS %s: trying address %s\n",
+ __func__, ds->ds_remotestr, da->da_remotestr);
+
+ clp = nfs4_set_ds_client(mds_srv->nfs_client,
+ (struct sockaddr *)&da->da_addr,
+ da->da_addrlen, IPPROTO_TCP,
+ timeo, retrans);
+ if (!IS_ERR(clp))
+ break;
+ }
+
+ if (IS_ERR(clp)) {
+ status = PTR_ERR(clp);
+ goto out;
+ }
+
+ status = nfs4_init_ds_session(clp, mds_srv->nfs_client->cl_lease_time);
+ if (status)
+ goto out_put;
+
+ smp_wmb();
+ ds->ds_clp = clp;
+ dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
+out:
+ return status;
+out_put:
+ nfs_put_client(clp);
+ goto out;
+}
+
+/*
+ * Create an rpc connection to the nfs4_pnfs_ds data server.
+ * Currently only supports IPv4 and IPv6 addresses.
+ * If connection fails, make devid unavailable.
+ */
+void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
+ struct nfs4_deviceid_node *devid, unsigned int timeo,
+ unsigned int retrans)
+{
+ if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
+ int err = 0;
+
+ err = _nfs4_pnfs_ds_connect(mds_srv, ds, timeo, retrans);
+ if (err)
+ nfs4_mark_deviceid_unavailable(devid);
+ nfs4_clear_ds_conn_bit(ds);
+ } else {
+ nfs4_wait_ds_connect(ds);
+ }
+}
+EXPORT_SYMBOL_GPL(nfs4_pnfs_ds_connect);
+
/*
* Currently only supports ipv4, ipv6 and one multi-path address.
*/
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