+ /* Ensure that we do not send more than 50 overlapping requests
+ to the same server. We may make this configurable later or
+ use ses->maxReq */
+ if(long_op == -1) {
+ /* oplock breaks must not be held up */
+ atomic_inc(&ses->server->inFlight);
+ } else {
+ spin_lock(&GlobalMid_Lock);
+ while(1) {
+ if(atomic_read(&ses->server->inFlight) >= CIFS_MAX_REQ){
+ spin_unlock(&GlobalMid_Lock);
+ wait_event(ses->server->request_q,
+ atomic_read(&ses->server->inFlight)
+ < CIFS_MAX_REQ);
+ spin_lock(&GlobalMid_Lock);
+ } else {
+ if(ses->server->tcpStatus == CifsExiting) {
+ spin_unlock(&GlobalMid_Lock);
+ return -ENOENT;
+ }
+
+ /* can not count locking commands against total since
+ they are allowed to block on server */
+
+ if(long_op < 3) {
+ /* update # of requests on the wire to server */
+ atomic_inc(&ses->server->inFlight);
+ }
+ spin_unlock(&GlobalMid_Lock);
+ break;
+ }
+ }
+ }
+ /* make sure that we sign in the same order that we send on this socket
+ and avoid races inside tcp sendmsg code that could cause corruption
+ of smb data */
+
+ down(&ses->server->tcpSem);
+