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| author | J. Bruce Fields <bfields@redhat.com> | 2016-05-17 12:38:21 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2016-06-15 10:32:25 -0400 |
| commit | 39a9beab5acb83176e8b9a4f0778749a09341f1f (patch) | |
| tree | 0b261e618de1605fd80eb68bd277ff0d95eef476 /net/sunrpc/clnt.c | |
| parent | d50039ea5ee63c589b0434baa5ecf6e5075bb6f9 (diff) | |
| download | linux-39a9beab5acb83176e8b9a4f0778749a09341f1f.tar.gz linux-39a9beab5acb83176e8b9a4f0778749a09341f1f.tar.bz2 linux-39a9beab5acb83176e8b9a4f0778749a09341f1f.zip | |
rpc: share one xps between all backchannels
The spec allows backchannels for multiple clients to share the same tcp
connection. When that happens, we need to use the same xprt for all of
them. Similarly, we need the same xps.
This fixes list corruption introduced by the multipath code.
Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Acked-by: Trond Myklebust <trondmy@primarydata.com>
Diffstat (limited to 'net/sunrpc/clnt.c')
| -rw-r--r-- | net/sunrpc/clnt.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index b33721d41adc..2808d550d273 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -452,10 +452,20 @@ static struct rpc_clnt *rpc_create_xprt(struct rpc_create_args *args, struct rpc_clnt *clnt = NULL; struct rpc_xprt_switch *xps; - xps = xprt_switch_alloc(xprt, GFP_KERNEL); - if (xps == NULL) { - xprt_put(xprt); - return ERR_PTR(-ENOMEM); + if (args->bc_xprt && args->bc_xprt->xpt_bc_xps) { + WARN_ON(args->protocol != XPRT_TRANSPORT_BC_TCP); + xps = args->bc_xprt->xpt_bc_xps; + xprt_switch_get(xps); + } else { + xps = xprt_switch_alloc(xprt, GFP_KERNEL); + if (xps == NULL) { + xprt_put(xprt); + return ERR_PTR(-ENOMEM); + } + if (xprt->bc_xprt) { + xprt_switch_get(xps); + xprt->bc_xprt->xpt_bc_xps = xps; + } } clnt = rpc_new_client(args, xps, xprt, NULL); if (IS_ERR(clnt)) |