diff options
| author | Tom Talpey <talpey@netapp.com> | 2008-10-09 15:01:00 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-10-10 15:11:40 -0400 |
| commit | fee08caf943e8ed3446ce42fa085b5e7e5f08d92 (patch) | |
| tree | 21419677bd5210c7a9068b698c23e52cd385f530 /net/sunrpc/xprtrdma | |
| parent | ad0e9e01da4ece70ff524b49c77c5e850d5dd53e (diff) | |
| download | lwn-fee08caf943e8ed3446ce42fa085b5e7e5f08d92.tar.gz lwn-fee08caf943e8ed3446ce42fa085b5e7e5f08d92.zip | |
RPC/RDMA: avoid an oops due to disconnect racing with async upcalls.
RDMA disconnects yield an upcall from the RDMA connection manager,
which can race with rpc transport close, e.g. on ^C of a mount.
Ensure any rdma cm_id and qp are fully destroyed before continuing.
Signed-off-by: Tom Talpey <talpey@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc/xprtrdma')
| -rw-r--r-- | net/sunrpc/xprtrdma/verbs.c | 20 |
1 files changed, 9 insertions, 11 deletions
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index e3fe9054fef6..d94f379f36d7 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -565,6 +565,7 @@ rpcrdma_ia_open(struct rpcrdma_xprt *xprt, struct sockaddr *addr, int memreg) return 0; out2: rdma_destroy_id(ia->ri_id); + ia->ri_id = NULL; out1: return rc; } @@ -585,15 +586,17 @@ rpcrdma_ia_close(struct rpcrdma_ia *ia) dprintk("RPC: %s: ib_dereg_mr returned %i\n", __func__, rc); } - if (ia->ri_id != NULL && !IS_ERR(ia->ri_id) && ia->ri_id->qp) - rdma_destroy_qp(ia->ri_id); + if (ia->ri_id != NULL && !IS_ERR(ia->ri_id)) { + if (ia->ri_id->qp) + rdma_destroy_qp(ia->ri_id); + rdma_destroy_id(ia->ri_id); + ia->ri_id = NULL; + } if (ia->ri_pd != NULL && !IS_ERR(ia->ri_pd)) { rc = ib_dealloc_pd(ia->ri_pd); dprintk("RPC: %s: ib_dealloc_pd returned %i\n", __func__, rc); } - if (ia->ri_id != NULL && !IS_ERR(ia->ri_id)) - rdma_destroy_id(ia->ri_id); } /* @@ -751,21 +754,16 @@ rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) if (rc) dprintk("RPC: %s: rpcrdma_ep_disconnect" " returned %i\n", __func__, rc); + rdma_destroy_qp(ia->ri_id); + ia->ri_id->qp = NULL; } - ep->rep_func = NULL; - /* padding - could be done in rpcrdma_buffer_destroy... */ if (ep->rep_pad_mr) { rpcrdma_deregister_internal(ia, ep->rep_pad_mr, &ep->rep_pad); ep->rep_pad_mr = NULL; } - if (ia->ri_id->qp) { - rdma_destroy_qp(ia->ri_id); - ia->ri_id->qp = NULL; - } - rpcrdma_clean_cq(ep->rep_cq); rc = ib_destroy_cq(ep->rep_cq); if (rc) |