nfs4: Add attribute directory related hooks

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

@@ -92,6 +92,8 @@ struct OpenDirCookie : public Cookie {
 			NameCacheEntry*				fCurrent;
 			bool						fEOF;
 
+			bool						fAttrDir;
+
 										~OpenDirCookie();
 };
 

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

@@ -10,6 +10,7 @@
 #include "DirectoryCache.h"
 
 #include <fs_cache.h>
+#include <NodeMonitor.h>
 
 #include "Inode.h"
 
@@ -46,10 +47,11 @@ DirectoryCacheSnapshot::~DirectoryCacheSnapshot()
 }
 
 
-DirectoryCache::DirectoryCache(Inode* inode)
+DirectoryCache::DirectoryCache(Inode* inode, bool attr)
 	:
 	fDirectoryCache(NULL),
 	fInode(inode),
+	fAttrDir(attr),
 	fTrashed(true)
 {
 	mutex_init(&fLock, NULL);
@@ -114,8 +116,12 @@ DirectoryCache::AddEntry(const char* name, ino_t node, bool created)
 		fDirectoryCache->fEntries.Add(entry);
 	}
 
-	return entry_cache_add(fInode->GetFileSystem()->DevId(), fInode->ID(), name,
-		node);
+	if (!fAttrDir) {
+		return entry_cache_add(fInode->GetFileSystem()->DevId(), fInode->ID(),
+			name, node);
+	}
+
+	return B_OK;
 }
 
 void
@@ -153,7 +159,10 @@ DirectoryCache::RemoveEntry(const char* name)
 		}
 	}
 
-	entry_cache_remove(fInode->GetFileSystem()->DevId(), fInode->ID(), name);
+	if (!fAttrDir) {
+		entry_cache_remove(fInode->GetFileSystem()->DevId(), fInode->ID(),
+			name);
+	}
 }
 
 
@@ -231,8 +240,13 @@ DirectoryCache::NotifyChanges(DirectoryCacheSnapshot* oldSnapshot,
 		}
 
 		if (!found) {
-			notify_entry_created(fInode->GetFileSystem()->DevId(),
-				fInode->ID(), newCurrent->fName, newCurrent->fNode);
+			if (fAttrDir) {
+				notify_attribute_changed(fInode->GetFileSystem()->DevId(),
+					fInode->ID(), newCurrent->fName, B_ATTR_CREATED);
+			} else {
+				notify_entry_created(fInode->GetFileSystem()->DevId(),
+					fInode->ID(), newCurrent->fName, newCurrent->fNode);
+			}
 		} else
 			oldSnapshot->fEntries.Remove(prev, oldCurrent);
 
@@ -243,8 +257,13 @@ DirectoryCache::NotifyChanges(DirectoryCacheSnapshot* oldSnapshot,
 	oldCurrent = oldIt.Next();
 
 	while (oldCurrent != NULL) {
-		notify_entry_removed(fInode->GetFileSystem()->DevId(), fInode->ID(),
-			oldCurrent->fName, oldCurrent->fNode);
+		if (fAttrDir) {
+			notify_attribute_changed(fInode->GetFileSystem()->DevId(),
+				fInode->ID(), newCurrent->fName, B_ATTR_REMOVED);
+		} else {
+			notify_entry_removed(fInode->GetFileSystem()->DevId(), fInode->ID(),
+				oldCurrent->fName, oldCurrent->fNode);
+		}
 		oldCurrent = oldIt.Next();
 	}
 }

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

@@ -37,7 +37,7 @@ struct DirectoryCacheSnapshot : public KernelReferenceable {
 
 class DirectoryCache : public DoublyLinkedListLinkImpl<DirectoryCache> {
 public:
-							DirectoryCache(Inode* inode);
+							DirectoryCache(Inode* inode, bool attr = false);
 							~DirectoryCache();
 
 	inline	status_t		Lock();
@@ -76,6 +76,7 @@ private:
 
 			Inode*			fInode;
 
+			bool			fAttrDir;
 			bool			fTrashed;
 			mutex			fLock;
 

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

@@ -44,6 +44,8 @@ struct FileInfo {
 			const char*	fName;
 			const char*	fPath;
 
+			FileHandle	fAttrDir;
+
 	inline				FileInfo();
 	inline				~FileInfo();
 	inline				FileInfo(const FileInfo& fi);

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

@@ -24,6 +24,7 @@ Inode::Inode()
 	:
 	fMetaCache(this),
 	fCache(NULL),
+	fAttrCache(NULL),
 	fDelegation(NULL),
 	fFileCache(NULL),
 	fMaxFileSize(0),
@@ -93,6 +94,7 @@ Inode::CreateInode(FileSystem* fs, const FileInfo &fi, Inode** _inode)
 
 		if (inode->fType == NF4DIR)
 			inode->fCache = new DirectoryCache(inode);
+		inode->fAttrCache = new DirectoryCache(inode, true);
 
 		// FATTR4_CHANGE is mandatory
 		inode->fChange = values[1].fData.fValue64;
@@ -131,6 +133,8 @@ Inode::~Inode()
 		file_cache_delete(fFileCache);
 
 	delete fCache;
+	delete fAttrCache;
+
 	mutex_destroy(&fStateLock);
 	mutex_destroy(&fFileCacheLock);
 	rw_lock_destroy(&fDelegationLock);

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

@@ -82,6 +82,8 @@ public:
 					status_t	ReadDir(void* buffer, uint32 size,
 									uint32* count, OpenDirCookie* cookie);
 
+					status_t	OpenAttrDir(OpenDirCookie* cookie);
+
 					status_t	TestLock(OpenFileCookie* cookie,
 									struct flock* lock);
 					status_t	AcquireLock(OpenFileCookie* cookie,
@@ -124,6 +126,7 @@ private:
 
 					MetadataCache	fMetaCache;
 					DirectoryCache*	fCache;
+					DirectoryCache*	fAttrCache;
 
 					rw_lock		fDelegationLock;
 					Delegation*	fDelegation;

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

@@ -39,11 +39,36 @@ Inode::OpenDir(OpenDirCookie* cookie)
 	cookie->fSnapshot = NULL;
 	cookie->fCurrent = NULL;
 	cookie->fEOF = false;
+	cookie->fAttrDir = false;
 
 	return B_OK;
 }
 
 
+status_t
+Inode::OpenAttrDir(OpenDirCookie* cookie)
+{
+	cookie->fFileSystem = fFileSystem;
+	cookie->fSpecial = 0;
+	cookie->fSnapshot = NULL;
+	cookie->fCurrent = NULL;
+	cookie->fEOF = false;
+	cookie->fAttrDir = true;
+
+	if (fInfo.fAttrDir.fSize == 0) {
+		FileHandle handle;
+
+		status_t result = NFS4Inode::OpenAttrDir(&handle);
+		if (result != B_OK)
+			return result;
+
+		fInfo.fAttrDir = handle;
+	}
+
+	return B_OK;	
+}
+
+
 status_t
 Inode::FillDirEntry(struct dirent* de, ino_t id, const char* name, uint32 pos,
 	uint32 size)
@@ -152,10 +177,13 @@ Inode::GetDirSnapshot(DirectoryCacheSnapshot** _snapshot,
 				continue;
 
 			ino_t id;
-			if (dirents[i].fAttrCount == 2)
-				id = FileIdToInoT(dirents[i].fAttrs[1].fData.fValue64);
-			else
-				id = FileIdToInoT(fFileSystem->AllocFileId());
+			if (!cookie->fAttrDir) {
+				if (dirents[i].fAttrCount == 2)
+					id = FileIdToInoT(dirents[i].fAttrs[1].fData.fValue64);
+				else
+					id = FileIdToInoT(fFileSystem->AllocFileId());
+			} else
+				id = 0;
 	
 			NameCacheEntry* entry = new NameCacheEntry(dirents[i].fName, id);
 			if (entry == NULL || entry->fName == NULL) {
@@ -188,29 +216,30 @@ Inode::ReadDir(void* _buffer, uint32 size, uint32* _count,
 	}
 
 	status_t result;
+	DirectoryCache* cache = cookie->fAttrDir ? fAttrCache : fCache;
 	if (cookie->fSnapshot == NULL) {
 		fFileSystem->Revalidator().Lock();
-		if (fCache->Lock() != B_OK) {
-			fCache->ResetAndLock();
+		if (cache->Lock() != B_OK) {
+			cache->ResetAndLock();
 		} else {
-			fFileSystem->Revalidator().RemoveDirectory(fCache);
+			fFileSystem->Revalidator().RemoveDirectory(cache);
 		}
 
-		cookie->fSnapshot = fCache->GetSnapshot();
+		cookie->fSnapshot = cache->GetSnapshot();
 		if (cookie->fSnapshot == NULL) {
 			uint64 change;
 			result = GetDirSnapshot(&cookie->fSnapshot, cookie, &change);
 			if (result != B_OK) {
-				fCache->Unlock();
+				cache->Unlock();
 				fFileSystem->Revalidator().Unlock();
 				return result;
 			}
-			fCache->ValidateChangeInfo(change);
-			fCache->SetSnapshot(cookie->fSnapshot);
+			cache->ValidateChangeInfo(change);
+			cache->SetSnapshot(cookie->fSnapshot);
 		}
 		cookie->fSnapshot->AcquireReference();
-		fFileSystem->Revalidator().AddDirectory(fCache);
-		fCache->Unlock();
+		fFileSystem->Revalidator().AddDirectory(cache);
+		cache->Unlock();
 		fFileSystem->Revalidator().Unlock();
 	}
 
@@ -219,7 +248,7 @@ Inode::ReadDir(void* _buffer, uint32 size, uint32* _count,
 	uint32 i = 0;
 	bool overflow = false;
 
-	if (cookie->fSpecial == 0 && i < *_count) {
+	if (cookie->fSpecial == 0 && i < *_count && !cookie->fAttrDir) {
 		struct dirent* de = reinterpret_cast<dirent*>(buffer + pos);
 
 		status_t result;
@@ -235,7 +264,7 @@ Inode::ReadDir(void* _buffer, uint32 size, uint32* _count,
 			return result;
 	}
 
-	if (cookie->fSpecial == 1 && i < *_count) {
+	if (cookie->fSpecial == 1 && i < *_count && !cookie->fAttrDir) {
 		struct dirent* de = reinterpret_cast<dirent*>(buffer + pos);
 		
 		status_t result;

src/add-ons/kernel/file_systems/nfs4/NFS4Defs.h

@@ -46,6 +46,7 @@ enum Opcode {
 	OpLookUpUp				= 16,
 	OpNverify				= 17,
 	OpOpen					= 18,
+	OpOpenAttrDir			= 19,
 	OpOpenConfirm			= 20,
 	OpPutFH					= 22,
 	OpPutRootFH				= 24,

src/add-ons/kernel/file_systems/nfs4/NFS4Inode.cpp

@@ -817,7 +817,10 @@ NFS4Inode::ReadDirOnce(DirEntry** dirents, uint32* count, OpenDirCookie* cookie,
 		Request request(serv);
 		RequestBuilder& req = request.Builder();
 
-		req.PutFH(fInfo.fHandle);
+		if (cookie->fAttrDir)
+			req.PutFH(fInfo.fAttrDir);
+		else
+			req.PutFH(fInfo.fHandle);
 
 		Attribute dirAttr[] = { FATTR4_CHANGE };
 		if (*change == 0)
@@ -875,6 +878,37 @@ NFS4Inode::ReadDirOnce(DirEntry** dirents, uint32* count, OpenDirCookie* cookie,
 }
 
 
+status_t
+NFS4Inode::OpenAttrDir(FileHandle* handle)
+{
+	do {
+		RPC::Server* serv = fFileSystem->Server();
+		Request request(serv);
+		RequestBuilder& req = request.Builder();
+
+		req.PutFH(fInfo.fHandle);
+		req.OpenAttrDir(true);
+		req.GetFH();
+
+		status_t result = request.Send();
+		if (result != B_OK)
+			return result;
+
+		ReplyInterpreter& reply = request.Reply();
+
+		if (HandleErrors(reply.NFS4Error(), serv))
+			continue;
+
+		reply.PutFH();
+		result = reply.OpenAttrDir();
+		if (result != B_OK)
+			return result;
+
+		return reply.GetFH(handle);
+	} while (true);
+}
+
+
 status_t
 NFS4Inode::TestLock(OpenFileCookie* cookie, LockType* type, uint64* position,
 	uint64* length, bool& conflict)

src/add-ons/kernel/file_systems/nfs4/NFS4Inode.h

@@ -68,6 +68,8 @@ protected:
 							OpenDirCookie* cookie, bool* eof, uint64* change,
 							uint64* dirCookie, uint64* dirCookieVerf);
 
+			status_t	OpenAttrDir(FileHandle* handle);
+
 			status_t	TestLock(OpenFileCookie* cookie, LockType* type,
 							uint64* position, uint64* length, bool& conflict);
 			status_t	AcquireLock(OpenFileCookie* cookie, LockInfo* lockInfo,

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

@@ -84,6 +84,7 @@ public:
 			status_t	Open(uint32* id, uint32* seq, bool* confirm,
 							OpenDelegationData* delegData,
 							ChangeInfo* changeInfo = NULL);
+	inline	status_t	OpenAttrDir();
 			status_t	OpenConfirm(uint32* stateSeq);
 	inline	status_t	PutFH();
 	inline	status_t	PutRootFH();
@@ -172,6 +173,13 @@ ReplyInterpreter::LookUpUp()
 }
 
 
+inline status_t
+ReplyInterpreter::OpenAttrDir()
+{
+	return _OperationError(OpOpenAttrDir);
+}
+
+
 inline status_t
 ReplyInterpreter::Nverify()
 {

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

@@ -445,6 +445,23 @@ RequestBuilder::OpenConfirm(uint32 seq, const uint32* id, uint32 stateSeq)
 }
 
 
+status_t
+RequestBuilder::OpenAttrDir(bool create)
+{
+	if (fProcedure != ProcCompound)
+		return B_BAD_VALUE;
+	if (fRequest == NULL)
+		return B_NO_MEMORY;
+
+	fRequest->Stream().AddUInt(OpOpenAttrDir);
+	fRequest->Stream().AddBoolean(create);
+
+	fOpCount++;
+
+	return B_OK;
+}
+
+
 status_t
 RequestBuilder::PutFH(const FileHandle& fh)
 {

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

@@ -56,6 +56,7 @@ public:
 										uint32 count = 0, bool excl = false,
 										OpenDelegation delegType
 											= OPEN_DELEGATE_NONE);
+			status_t				OpenAttrDir(bool create);
 			status_t				OpenConfirm(uint32 seq, const uint32* id,
 										uint32 stateSeq);
 			status_t				PutFH(const FileHandle& fh);

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

@@ -610,6 +610,52 @@ nfs4_rewind_dir(fs_volume* volume, fs_vnode* vnode, void* _cookie)
 }
 
 
+static status_t
+nfs4_open_attr_dir(fs_volume* volume, fs_vnode* vnode, void** _cookie)
+{
+	OpenDirCookie* cookie = new(std::nothrow) OpenDirCookie;
+	if (cookie == NULL)
+		return B_NO_MEMORY;
+	*_cookie = cookie;
+
+	Inode* inode = reinterpret_cast<Inode*>(vnode->private_node);
+	status_t result = inode->OpenAttrDir(cookie);
+	if (result != B_OK)
+		delete cookie;
+
+	return result;
+}
+
+
+static status_t
+nfs4_close_attr_dir(fs_volume* volume, fs_vnode* vnode, void* cookie)
+{
+	return nfs4_close_attr_dir(volume, vnode, cookie);
+}
+
+
+static status_t
+nfs4_free_attr_dir_cookie(fs_volume* volume, fs_vnode* vnode, void* cookie)
+{
+	return nfs4_free_dir_cookie(volume, vnode, cookie);
+}
+
+
+static status_t
+nfs4_read_attr_dir(fs_volume* volume, fs_vnode* vnode, void* cookie,
+	struct dirent* buffer, size_t bufferSize, uint32* _num)
+{
+	return nfs4_read_dir(volume, vnode, cookie, buffer, bufferSize, _num);
+}
+
+
+static status_t
+nfs4_rewind_attr_dir(fs_volume* volume, fs_vnode* vnode, void* cookie)
+{
+	return nfs4_rewind_attr_dir(volume, vnode, cookie);
+}
+
+
 static status_t
 nfs4_test_lock(fs_volume* volume, fs_vnode* vnode, void* _cookie,
 	struct flock* lock)
@@ -774,11 +820,11 @@ fs_vnode_ops gNFSv4VnodeOps = {
 	nfs4_rewind_dir,
 
 	/* attribute directory operations */
-	NULL,	// open_attr_dir
-	NULL,	// close_attr_dir
-	NULL,	// free_attr_dir_cookie
-	NULL,	// read_attr_dir
-	NULL,	// rewind_attr_dir
+	nfs4_open_attr_dir,
+	nfs4_close_attr_dir,
+	nfs4_free_attr_dir_cookie,
+	nfs4_read_attr_dir,
+	nfs4_rewind_attr_dir,
 
 	/* attribute operations */
 	NULL,	// create_attr