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nfs41: create NFSv3 DS connection if specified

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Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Tom Haynes <Thomas.Haynes@primarydata.com>
This commit is contained in:
Peng Tao 2014-05-30 18:15:59 +08:00 committed by Tom Haynes
parent 30626f9c32
commit 5f01d95394
3 changed files with 93 additions and 5 deletions
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3
fs/nfs/nfs4super.c
View File

@ -346,6 +346,9 @@ static int __init init_nfs_v4(void)
static void __exit exit_nfs_v4(void)
{
/* Not called in the _init(), conditionally loaded */
nfs4_pnfs_v3_ds_connect_unload();
unregister_nfs_version(&nfs_v4);
nfs4_unregister_sysctl();
nfs_idmap_quit();

7
fs/nfs/pnfs.h
View File

@ -323,9 +323,10 @@ 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_v3_ds_connect_unload(void);
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, u32 versoin, u32 minor_version,
unsigned int retrans, u32 version, u32 minor_version,
rpc_authflavor_t au_flavor);
struct nfs4_pnfs_ds_addr *nfs4_decode_mp_ds_addr(struct net *net,
struct xdr_stream *xdr,
@ -615,6 +616,10 @@ static inline struct nfs4_threshold *pnfs_mdsthreshold_alloc(void)
return NULL;
}
static inline void nfs4_pnfs_v3_ds_connect_unload(void)
{
}
#endif /* CONFIG_NFS_V4_1 */
#endif /* FS_NFS_PNFS_H */

88
fs/nfs/pnfs_nfs.c
View File

@ -10,6 +10,7 @@
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/sunrpc/addr.h>
#include <linux/module.h>
#include "nfs4session.h"
#include "internal.h"
@ -550,7 +551,75 @@ static void nfs4_clear_ds_conn_bit(struct nfs4_pnfs_ds *ds)
wake_up_bit(&ds->ds_state, NFS4DS_CONNECTING);
}
static int _nfs4_pnfs_ds_connect(struct nfs_server *mds_srv,
static struct nfs_client *(*get_v3_ds_connect)(
struct nfs_client *mds_clp,
const struct sockaddr *ds_addr,
int ds_addrlen,
int ds_proto,
unsigned int ds_timeo,
unsigned int ds_retrans,
rpc_authflavor_t au_flavor);
static bool load_v3_ds_connect(void)
{
if (!get_v3_ds_connect) {
get_v3_ds_connect = symbol_request(nfs3_set_ds_client);
WARN_ON_ONCE(!get_v3_ds_connect);
}
return(get_v3_ds_connect != NULL);
}
void __exit nfs4_pnfs_v3_ds_connect_unload(void)
{
if (get_v3_ds_connect) {
symbol_put(nfs3_set_ds_client);
get_v3_ds_connect = NULL;
}
}
EXPORT_SYMBOL_GPL(nfs4_pnfs_v3_ds_connect_unload);
static int _nfs4_pnfs_v3_ds_connect(struct nfs_server *mds_srv,
struct nfs4_pnfs_ds *ds,
unsigned int timeo,
unsigned int retrans,
rpc_authflavor_t au_flavor)
{
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, au_flavor);
if (!load_v3_ds_connect())
goto out;
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 = get_v3_ds_connect(mds_srv->nfs_client,
(struct sockaddr *)&da->da_addr,
da->da_addrlen, IPPROTO_TCP,
timeo, retrans, au_flavor);
if (!IS_ERR(clp))
break;
}
if (IS_ERR(clp)) {
status = PTR_ERR(clp);
goto out;
}
smp_wmb();
ds->ds_clp = clp;
dprintk("%s [new] addr: %s\n", __func__, ds->ds_remotestr);
out:
return status;
}
static int _nfs4_pnfs_v4_ds_connect(struct nfs_server *mds_srv,
struct nfs4_pnfs_ds *ds,
unsigned int timeo,
unsigned int retrans,
@ -562,7 +631,7 @@ static int _nfs4_pnfs_ds_connect(struct nfs_server *mds_srv,
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);
au_flavor);
list_for_each_entry(da, &ds->ds_addrs, da_node) {
dprintk("%s: DS %s: trying address %s\n",
@ -609,8 +678,19 @@ void nfs4_pnfs_ds_connect(struct nfs_server *mds_srv, struct nfs4_pnfs_ds *ds,
if (test_and_set_bit(NFS4DS_CONNECTING, &ds->ds_state) == 0) {
int err = 0;
err = _nfs4_pnfs_ds_connect(mds_srv, ds, timeo, retrans,
minor_version, au_flavor);
if (version == 3) {
err = _nfs4_pnfs_v3_ds_connect(mds_srv, ds, timeo,
retrans, au_flavor);
} else if (version == 4) {
err = _nfs4_pnfs_v4_ds_connect(mds_srv, ds, timeo,
retrans, minor_version,
au_flavor);
} else {
dprintk("%s: unsupported DS version %d\n", __func__,
version);
err = -EPROTONOSUPPORT;
}
if (err)
nfs4_mark_deviceid_unavailable(devid);
nfs4_clear_ds_conn_bit(ds);