An IB provider can invoke rpcrdma_conn_func() in an IRQ context, thus rpcrdma_conn_func() cannot be allowed to directly invoke generic RPC functions like xprt_wake_pending_tasks().
Signed-off-by: Chuck Lever <[email protected]> Tested-by: Steve Wise <[email protected]> --- net/sunrpc/xprtrdma/rpc_rdma.c | 22 +++++++++++++++------- net/sunrpc/xprtrdma/verbs.c | 3 +++ net/sunrpc/xprtrdma/xprt_rdma.h | 3 +++ 3 files changed, 21 insertions(+), 7 deletions(-) diff --git a/net/sunrpc/xprtrdma/rpc_rdma.c b/net/sunrpc/xprtrdma/rpc_rdma.c index 400aa1b..c296468 100644 --- a/net/sunrpc/xprtrdma/rpc_rdma.c +++ b/net/sunrpc/xprtrdma/rpc_rdma.c @@ -676,15 +676,11 @@ rpcrdma_inline_fixup(struct rpc_rqst *rqst, char *srcp, int copy_len, int pad) rqst->rq_private_buf = rqst->rq_rcv_buf; } -/* - * This function is called when an async event is posted to - * the connection which changes the connection state. All it - * does at this point is mark the connection up/down, the rpc - * timers do the rest. - */ void -rpcrdma_conn_func(struct rpcrdma_ep *ep) +rpcrdma_connect_worker(struct work_struct *work) { + struct rpcrdma_ep *ep = + container_of(work, struct rpcrdma_ep, rep_connect_worker.work); struct rpc_xprt *xprt = ep->rep_xprt; spin_lock_bh(&xprt->transport_lock); @@ -701,6 +697,18 @@ rpcrdma_conn_func(struct rpcrdma_ep *ep) } /* + * This function is called when an async event is posted to + * the connection which changes the connection state. All it + * does at this point is mark the connection up/down, the rpc + * timers do the rest. + */ +void +rpcrdma_conn_func(struct rpcrdma_ep *ep) +{ + schedule_delayed_work(&ep->rep_connect_worker, 0); +} + +/* * This function is called when memory window unbind which we are waiting * for completes. Just use rr_func (zeroed by upcall) to signal completion. */ diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 8f9704e..9cb88f3 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -742,6 +742,7 @@ rpcrdma_ep_create(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia, INIT_CQCOUNT(ep); ep->rep_ia = ia; init_waitqueue_head(&ep->rep_connect_wait); + INIT_DELAYED_WORK(&ep->rep_connect_worker, rpcrdma_connect_worker); /* * Create a single cq for receive dto and mw_bind (only ever @@ -817,6 +818,8 @@ rpcrdma_ep_destroy(struct rpcrdma_ep *ep, struct rpcrdma_ia *ia) dprintk("RPC: %s: entering, connected is %d\n", __func__, ep->rep_connected); + cancel_delayed_work_sync(&ep->rep_connect_worker); + if (ia->ri_id->qp) { rc = rpcrdma_ep_disconnect(ep, ia); if (rc) diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h index 98340a3..c620d13 100644 --- a/net/sunrpc/xprtrdma/xprt_rdma.h +++ b/net/sunrpc/xprtrdma/xprt_rdma.h @@ -43,6 +43,7 @@ #include <linux/wait.h> /* wait_queue_head_t, etc */ #include <linux/spinlock.h> /* spinlock_t, etc */ #include <linux/atomic.h> /* atomic_t, etc */ +#include <linux/workqueue.h> /* struct work_struct */ #include <rdma/rdma_cm.h> /* RDMA connection api */ #include <rdma/ib_verbs.h> /* RDMA verbs api */ @@ -87,6 +88,7 @@ struct rpcrdma_ep { struct rpc_xprt *rep_xprt; /* for rep_func */ struct rdma_conn_param rep_remote_cma; struct sockaddr_storage rep_remote_addr; + struct delayed_work rep_connect_worker; }; #define INIT_CQCOUNT(ep) atomic_set(&(ep)->rep_cqcount, (ep)->rep_cqinit) @@ -336,6 +338,7 @@ int rpcrdma_deregister_external(struct rpcrdma_mr_seg *, /* * RPC/RDMA connection management calls - xprtrdma/rpc_rdma.c */ +void rpcrdma_connect_worker(struct work_struct *); void rpcrdma_conn_func(struct rpcrdma_ep *); void rpcrdma_reply_handler(struct rpcrdma_rep *); -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
