nfs4: Do not sync too often if delegation is held

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

@@ -20,20 +20,16 @@ Delegation::Delegation(const OpenDelegationData& data, Inode* inode,
 	fData(data),
 	fInode(inode)
 {
-	rw_lock_init(&fLock, NULL);
 }
 
 
-Delegation::~Delegation()
-{
-	rw_lock_destroy(&fLock);
-}
-
 status_t
 Delegation::GiveUp(bool truncate)
 {
 	if (!truncate) {
-		// save buffers
+		fInode->SyncAndCommit(true);
+
+		// TODO: claim locks
 	}
 
 	ReturnDelegation();

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

@@ -22,7 +22,6 @@ class Delegation : public NFS4Object,
 public:
 						Delegation(const OpenDelegationData& data, Inode* inode,
 							uint64 clientID);
-						~Delegation();
 
 	// TODO: locks
 
@@ -38,8 +37,6 @@ private:
 	uint64				fClientID;
 	OpenDelegationData	fData;
 	Inode*				fInode;
-
-	rw_lock				fLock;
 };
 
 

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

@@ -648,8 +648,7 @@ Inode::AcquireLock(OpenFileCookie* cookie, const struct flock* lock,
 status_t
 Inode::ReleaseLock(OpenFileCookie* cookie, const struct flock* lock)
 {
-	file_cache_sync(fFileCache);
-	Commit();
+	SyncAndCommit();
 
 	LockInfo* prev = NULL;
 
@@ -699,8 +698,7 @@ Inode::ReleaseLock(OpenFileCookie* cookie, const struct flock* lock)
 status_t
 Inode::ReleaseAllLocks(OpenFileCookie* cookie)
 {
-	file_cache_sync(fFileCache);
-	Commit();
+	SyncAndCommit();
 
 	OpenState* state = cookie->fOpenState;
 	MutexLocker _(state->fLocksLock);
@@ -790,3 +788,14 @@ Inode::RecallDelegation(bool truncate)
 	fDelegation = NULL;
 }
 
+
+status_t
+Inode::SyncAndCommit(bool force)
+{
+	if (!force && fDelegation != NULL)
+		return B_OK;
+
+	file_cache_sync(fFileCache);
+	return Commit();
+}
+

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

@@ -42,6 +42,7 @@ public:
 					status_t	Access(int mode);
 
 					status_t	Commit();
+					status_t	SyncAndCommit(bool force = false);
 
 					status_t	CreateObject(const char* name, const char* path,
 									int mode, FileType type);

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

@@ -146,8 +146,7 @@ Inode::Open(int mode, OpenFileCookie* cookie)
 status_t
 Inode::Close(OpenFileCookie* cookie)
 {
-	file_cache_sync(fFileCache);
-	Commit();
+	SyncAndCommit();
 
 	MutexLocker _(fStateLock);
 	if (cookie->fOpenState != NULL) {

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

@@ -308,11 +308,7 @@ static status_t
 nfs4_fsync(fs_volume* volume, fs_vnode* vnode)
 {
 	Inode* inode = reinterpret_cast<Inode*>(vnode->private_node);
-	status_t result = file_cache_sync(inode->FileCache());
-	if (result != B_OK)
-		return result;
-
-	return inode->Commit();
+	return inode->SyncAndCommit();
 }