diff options
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/backchannel_rqst.c | 35 | ||||
| -rw-r--r-- | net/sunrpc/xprtrdma/backchannel.c | 8 |
2 files changed, 34 insertions, 9 deletions
diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c index caa94cf57123..68b1fcdea8f0 100644 --- a/net/sunrpc/backchannel_rqst.c +++ b/net/sunrpc/backchannel_rqst.c @@ -25,6 +25,22 @@ unsigned int xprt_bc_max_slots(struct rpc_xprt *xprt) } /* + * Helper function to nullify backchannel server pointer in transport. + * We need to synchronize setting the pointer to NULL (done so after + * the backchannel server is shutdown) with the usage of that pointer + * by the backchannel request processing routines + * xprt_complete_bc_request() and rpcrdma_bc_receive_call(). + */ +void xprt_svc_destroy_nullify_bc(struct rpc_xprt *xprt, struct svc_serv **serv) +{ + spin_lock(&xprt->bc_pa_lock); + svc_destroy(serv); + xprt->bc_serv = NULL; + spin_unlock(&xprt->bc_pa_lock); +} +EXPORT_SYMBOL_GPL(xprt_svc_destroy_nullify_bc); + +/* * Helper routines that track the number of preallocation elements * on the transport. */ @@ -354,7 +370,6 @@ found: void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied) { struct rpc_xprt *xprt = req->rq_xprt; - struct svc_serv *bc_serv = xprt->bc_serv; spin_lock(&xprt->bc_pa_lock); list_del(&req->rq_bc_pa_list); @@ -365,7 +380,21 @@ void xprt_complete_bc_request(struct rpc_rqst *req, uint32_t copied) set_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state); dprintk("RPC: add callback request to list\n"); + xprt_enqueue_bc_request(req); +} + +void xprt_enqueue_bc_request(struct rpc_rqst *req) +{ + struct rpc_xprt *xprt = req->rq_xprt; + struct svc_serv *bc_serv; + xprt_get(xprt); - lwq_enqueue(&req->rq_bc_list, &bc_serv->sv_cb_list); - svc_pool_wake_idle_thread(&bc_serv->sv_pools[0]); + spin_lock(&xprt->bc_pa_lock); + bc_serv = xprt->bc_serv; + if (bc_serv) { + lwq_enqueue(&req->rq_bc_list, &bc_serv->sv_cb_list); + svc_pool_wake_idle_thread(&bc_serv->sv_pools[0]); + } + spin_unlock(&xprt->bc_pa_lock); } +EXPORT_SYMBOL_GPL(xprt_enqueue_bc_request); diff --git a/net/sunrpc/xprtrdma/backchannel.c b/net/sunrpc/xprtrdma/backchannel.c index 8c817e755262..2f0f9618dd05 100644 --- a/net/sunrpc/xprtrdma/backchannel.c +++ b/net/sunrpc/xprtrdma/backchannel.c @@ -9,6 +9,7 @@ #include <linux/sunrpc/svc.h> #include <linux/sunrpc/svc_xprt.h> #include <linux/sunrpc/svc_rdma.h> +#include <linux/sunrpc/bc_xprt.h> #include "xprt_rdma.h" #include <trace/events/rpcrdma.h> @@ -220,7 +221,6 @@ void rpcrdma_bc_receive_call(struct rpcrdma_xprt *r_xprt, struct rpcrdma_rep *rep) { struct rpc_xprt *xprt = &r_xprt->rx_xprt; - struct svc_serv *bc_serv; struct rpcrdma_req *req; struct rpc_rqst *rqst; struct xdr_buf *buf; @@ -261,11 +261,7 @@ void rpcrdma_bc_receive_call(struct rpcrdma_xprt *r_xprt, trace_xprtrdma_cb_call(r_xprt, rqst); /* Queue rqst for ULP's callback service */ - bc_serv = xprt->bc_serv; - xprt_get(xprt); - lwq_enqueue(&rqst->rq_bc_list, &bc_serv->sv_cb_list); - - svc_pool_wake_idle_thread(&bc_serv->sv_pools[0]); + xprt_enqueue_bc_request(rqst); r_xprt->rx_stats.bcall_count++; return; |