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SUNRPC: rpc_clnt_add_xprt setup function for NFS layer

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Use a setup function to call into the NFS layer to test an rpc_xprt
for session trunking so as to not leak the rpc_xprt_switch into
the nfs layer.

Search for the address in the rpc_xprt_switch first so as not to
put an unnecessary EXCHANGE_ID on the wire.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Andy Adamson
2016-09-09 09:22:26 -04:00
committed by Anna Schumaker
parent 39e5d2df95
commit fda0ab4117
2 changed files with 76 additions and 0 deletions
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12
include/linux/sunrpc/clnt.h
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@@ -125,6 +125,13 @@ struct rpc_create_args {
struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
};
struct rpc_add_xprt_test {
int (*add_xprt_test)(struct rpc_clnt *,
struct rpc_xprt *,
void *calldata);
void *data;
};
/* Values for "flags" field */
#define RPC_CLNT_CREATE_HARDRTRY (1UL << 0)
#define RPC_CLNT_CREATE_AUTOBIND (1UL << 2)
@@ -198,6 +205,11 @@ int rpc_clnt_add_xprt(struct rpc_clnt *, struct xprt_create *,
void rpc_cap_max_reconnect_timeout(struct rpc_clnt *clnt,
unsigned long timeo);
int rpc_clnt_setup_test_and_add_xprt(struct rpc_clnt *,
struct rpc_xprt_switch *,
struct rpc_xprt *,
void *);
const char *rpc_proc_name(const struct rpc_task *task);
void rpc_clnt_xprt_switch_put(struct rpc_clnt *);