nfs4: close() should also wake snoozing threads

When server returns error codes like LOCKED, DEALY, etc the client waits
some time before retrying (unless in O_NONBLOCK mode), close() should wake
snoozing threads.

src/add-ons/kernel/file_systems/nfs4/Cookie.cpp

@@ -18,14 +18,17 @@ vint64 OpenFileCookie::fLastOwnerId = 0;
 
 Cookie::Cookie()
 	:
-	fRequests(NULL)
+	fRequests(NULL),
+	fSnoozeCancel(create_sem(1, NULL))
 {
+	acquire_sem(fSnoozeCancel);
 	mutex_init(&fRequestLock, NULL);
 }
 
 
 Cookie::~Cookie()
 {
+	delete_sem(fSnoozeCancel);
 	mutex_destroy(&fRequestLock);
 }
 
@@ -74,6 +77,8 @@ Cookie::UnregisterRequest(RPC::Request* req)
 status_t
 Cookie::CancelAll()
 {
+	release_sem(fSnoozeCancel);
+
 	mutex_lock(&fRequestLock);
 	RequestEntry* ent = fRequests;
 	while (ent != NULL) {

src/add-ons/kernel/file_systems/nfs4/Cookie.h

@@ -38,6 +38,8 @@ struct Cookie {
 			RequestEntry*	fRequests;
 			mutex			fRequestLock;
 
+			sem_id			fSnoozeCancel;
+
 							Cookie();
 	virtual					~Cookie();
 

src/add-ons/kernel/file_systems/nfs4/Inode.cpp

@@ -1533,18 +1533,37 @@ Inode::_HandleErrors(uint32 nfs4Error, RPC::Server* serv,
 		// server needs more time, we need to wait
 		case NFS4ERR_LOCKED:
 		case NFS4ERR_DELAY:
-			if (cookie == NULL || (cookie->fMode & O_NONBLOCK) == 0) {
+			if (cookie == NULL) {
 				snooze_etc(5 * 1000000, B_SYSTEM_TIMEBASE, B_RELATIVE_TIMEOUT);
 				return true;
+			} else if ((cookie->fMode & O_NONBLOCK) == 0) {
+				status_t result = acquire_sem_etc(cookie->fSnoozeCancel, 1,
+					B_RELATIVE_TIMEOUT, 5 * 1000000);
+				if (result == B_TIMED_OUT)
+					return true;
+				else {
+					release_sem(cookie->fSnoozeCancel);
+					return false;
+				}
 			} else
 				return false;
 
 		// server is in grace period, we need to wait
 		case NFS4ERR_GRACE:
-			if (cookie == NULL || (cookie->fMode & O_NONBLOCK) == 0) {
+			if (cookie == NULL) {
 				snooze_etc(fFilesystem->NFSServer()->LeaseTime() / 3,
 					B_SYSTEM_TIMEBASE, B_RELATIVE_TIMEOUT);
 				return true;
+			} else if ((cookie->fMode & O_NONBLOCK) == 0) {
+				status_t result = acquire_sem_etc(cookie->fSnoozeCancel, 1,
+					B_RELATIVE_TIMEOUT,
+					fFilesystem->NFSServer()->LeaseTime() / 3);
+				if (result == B_TIMED_OUT)
+					return true;
+				else {
+					release_sem(cookie->fSnoozeCancel);
+					return false;
+				}
 			} else
 				return false;