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NFSv4.1 test and add 4.1 trunking transport 

For each location returned in FS_LOCATION query, establish a
transport to the server, send EXCHANGE_ID and test for trunking,
if successful, add the transport to the exiting client.

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Olga Kornievskaia 2021-12-09 14:53:35 -05:00 committed by Anna Schumaker
parent b8a09619a5
commit 4ca9f31a2b
1 changed files with 55 additions and 1 deletions
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56
fs/nfs/nfs4proc.c
View File

@ -3935,6 +3935,56 @@ int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
return err;
}
static void test_fs_location_for_trunking(struct nfs4_fs_location *location,
struct nfs_client *clp,
struct nfs_server *server)
{
int i;
for (i = 0; i < location->nservers; i++) {
struct nfs4_string *srv_loc = &location->servers[i];
struct sockaddr addr;
size_t addrlen;
struct xprt_create xprt_args = {
.ident = 0,
.net = clp->cl_net,
};
struct nfs4_add_xprt_data xprtdata = {
.clp = clp,
};
struct rpc_add_xprt_test rpcdata = {
.add_xprt_test = clp->cl_mvops->session_trunk,
.data = &xprtdata,
};
char *servername = NULL;
if (!srv_loc->len)
continue;
addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len,
&addr, sizeof(addr),
clp->cl_net, server->port);
if (!addrlen)
return;
xprt_args.dstaddr = &addr;
xprt_args.addrlen = addrlen;
servername = kmalloc(srv_loc->len + 1, GFP_KERNEL);
if (!servername)
return;
memcpy(servername, srv_loc->data, srv_loc->len);
servername[srv_loc->len] = '\0';
xprt_args.servername = servername;
xprtdata.cred = nfs4_get_clid_cred(clp);
rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args,
rpc_clnt_setup_test_and_add_xprt,
&rpcdata);
if (xprtdata.cred)
put_cred(xprtdata.cred);
kfree(servername);
}
}
static int _nfs4_discover_trunking(struct nfs_server *server,
struct nfs_fh *fhandle)
{
@ -3944,7 +3994,7 @@ static int _nfs4_discover_trunking(struct nfs_server *server,
struct nfs_client *clp = server->nfs_client;
const struct nfs4_state_maintenance_ops *ops =
clp->cl_mvops->state_renewal_ops;
int status = -ENOMEM;
int status = -ENOMEM, i;
cred = ops->get_state_renewal_cred(clp);
if (cred == NULL) {
@ -3962,6 +4012,10 @@ static int _nfs4_discover_trunking(struct nfs_server *server,
cred);
if (status)
goto out;
for (i = 0; i < locations->nlocations; i++)
test_fs_location_for_trunking(&locations->locations[i], clp,
server);
out:
if (page)
__free_page(page);