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sunrpc: Add xprt after nfs4_test_session_trunk()

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Multipathing: In case of NFSv3, rpc_clnt_test_and_add_xprt() adds
the xprt to xprt switch (i.e. xps) if rpc_call_null_helper() returns
success. But in case of NFSv4.1, it needs to do EXCHANGEID to verify
the path along with check for session trunking.

Add the xprt in nfs4_test_session_trunk() only when
nfs4_detect_session_trunking() returns success. Also release refcount
hold by rpc_clnt_setup_test_and_add_xprt().

Signed-off-by: Santosh kumar pradhan <[email protected]>
Tested-by: Suresh Jayaraman <[email protected]>
Reported-by: Aditya Agnihotri <[email protected]>
Signed-off-by: Anna Schumaker <[email protected]>
This commit is contained in:
Santosh kumar pradhan 2018-12-19 12:29:57 +05:30 • committed by Anna Schumaker
commit 10e037d1e0
5 changed files with 15 additions and 9 deletions
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3
net/sunrpc/clnt.c
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@ -2661,6 +2661,9 @@ int rpc_clnt_setup_test_and_add_xprt(struct rpc_clnt *clnt,
/* rpc_xprt_switch and rpc_xprt are deferrenced by add_xprt_test() */
xtest->add_xprt_test(clnt, xprt, xtest->data);
xprt_put(xprt);
xprt_switch_put(xps);
/* so that rpc_clnt_add_xprt does not call rpc_xprt_switch_add_xprt */
return 1;
out_err: