From 15c50ccc3c4377ad02ff6da7792c1d54633d3122 Mon Sep 17 00:00:00 2001 From: Sebastien Buisson Date: Fri, 28 Feb 2014 21:16:42 -0500 Subject: [PATCH] lustre/ptlrpc: fix 'data race condition' issues Fix 'data race condition' defects found by Coverity version 6.5.0: Data race condition (MISSING_LOCK) Accessing variable without holding lock. Elsewhere, this variable is accessed with lock held. Signed-off-by: Sebastien Buisson Reviewed-on: http://review.whamcloud.com/6575 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-2744 Reviewed-by: Andreas Dilger Signed-off-by: Oeg Drokin Signed-off-by: Greg Kroah-Hartman --- drivers/staging/lustre/lustre/ptlrpc/client.c | 6 ++++++ drivers/staging/lustre/lustre/ptlrpc/niobuf.c | 4 ++++ 2 files changed, 10 insertions(+) diff --git a/drivers/staging/lustre/lustre/ptlrpc/client.c b/drivers/staging/lustre/lustre/ptlrpc/client.c index a32b72235a00..87ff5ecf8847 100644 --- a/drivers/staging/lustre/lustre/ptlrpc/client.c +++ b/drivers/staging/lustre/lustre/ptlrpc/client.c @@ -1190,7 +1190,9 @@ static int after_reply(struct ptlrpc_request *req) * will roundup it */ req->rq_replen = req->rq_nob_received; req->rq_nob_received = 0; + spin_lock(&req->rq_lock); req->rq_resend = 1; + spin_unlock(&req->rq_lock); return 0; } @@ -1408,7 +1410,9 @@ static int ptlrpc_send_new_req(struct ptlrpc_request *req) req->rq_status = rc; return 1; } else { + spin_lock(&req->rq_lock); req->rq_wait_ctx = 1; + spin_unlock(&req->rq_lock); return 0; } } @@ -1423,7 +1427,9 @@ static int ptlrpc_send_new_req(struct ptlrpc_request *req) rc = ptl_send_rpc(req, 0); if (rc) { DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc); + spin_lock(&req->rq_lock); req->rq_net_err = 1; + spin_unlock(&req->rq_lock); return rc; } return 0; diff --git a/drivers/staging/lustre/lustre/ptlrpc/niobuf.c b/drivers/staging/lustre/lustre/ptlrpc/niobuf.c index 1e94597eaea5..a47a8d807d5b 100644 --- a/drivers/staging/lustre/lustre/ptlrpc/niobuf.c +++ b/drivers/staging/lustre/lustre/ptlrpc/niobuf.c @@ -511,7 +511,9 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply) CDEBUG(D_HA, "muting rpc for failed imp obd %s\n", request->rq_import->imp_obd->obd_name); /* this prevents us from waiting in ptlrpc_queue_wait */ + spin_lock(&request->rq_lock); request->rq_err = 1; + spin_unlock(&request->rq_lock); request->rq_status = -ENODEV; return -ENODEV; } @@ -553,7 +555,9 @@ int ptl_send_rpc(struct ptlrpc_request *request, int noreply) if (rc) { /* this prevents us from looping in * ptlrpc_queue_wait */ + spin_lock(&request->rq_lock); request->rq_err = 1; + spin_unlock(&request->rq_lock); request->rq_status = rc; GOTO(cleanup_bulk, rc); } -- 2.39.5