implement fdatasync

Change-Id: I2aefc1acebce93a2c53a6d3be5eef3b9e69480ec
Reviewed-on: https://review.haiku-os.org/c/haiku/+/8507
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: nephele nephele <[email protected]>
Reviewed-by: Jérôme Duval <[email protected]>

headers/build/private/kernel/syscalls.h

@@ -62,7 +62,7 @@ extern int			_kern_open_dir_entry_ref(dev_t device, ino_t inode,
 extern int			_kern_open_dir(int fd, const char *path);
 extern int			_kern_open_parent_dir(int fd, char *name,
 						size_t nameLength);
-extern status_t		_kern_fsync(int fd);
+extern status_t		_kern_fsync(int fd, bool dataOnly);
 extern off_t		_kern_seek(int fd, off_t pos, int seekType);
 extern status_t		_kern_create_dir_entry_ref(dev_t device, ino_t inode,
 						const char *name, int perms);

headers/os/drivers/fs_interface.h

@@ -150,7 +150,7 @@ struct fs_vnode_ops {
 				uint8 event, selectsync* sync);
 	status_t (*deselect)(fs_volume* volume, fs_vnode* vnode, void* cookie,
 				uint8 event, selectsync* sync);
-	status_t (*fsync)(fs_volume* volume, fs_vnode* vnode);
+	status_t (*fsync)(fs_volume* volume, fs_vnode* vnode, bool dataOnly);
 
 	status_t (*read_symlink)(fs_volume* volume, fs_vnode* link, char* buffer,
 				size_t* _bufferSize);

headers/posix/unistd.h

@@ -72,7 +72,7 @@
 #define _POSIX_SPAWN						(200809L)
 #define _POSIX_SPIN_LOCKS					(-1)
 #define _POSIX_SPORADIC_SERVER				(-1)
-#define _POSIX_SYNCHRONIZED_IO				(-1) /* missing fdatasync() */
+#define _POSIX_SYNCHRONIZED_IO				(200809L)
 #define _POSIX_THREAD_ATTR_STACKADDR		(200809L)
 #define _POSIX_THREAD_ATTR_STACKSIZE		(200809L)
 #define _POSIX_THREAD_CPUTIME				(200809L)
@@ -401,6 +401,7 @@ extern off_t	lseek(int fd, off_t offset, int whence);
 
 extern void		sync(void);
 extern int		fsync(int fd);
+extern int		fdatasync(int fd);
 
 extern int		chown(const char *path, uid_t owner, gid_t group);
 extern int		fchown(int fd, uid_t owner, gid_t group);

headers/private/fs_shell/fssh_fs_interface.h

@@ -165,7 +165,7 @@ struct fssh_fs_vnode_ops {
 				fssh_fs_cookie cookie, uint8_t event, fssh_selectsync *sync);
 	fssh_status_t (*deselect)(fssh_fs_volume *volume, fssh_fs_vnode *vnode,
 				fssh_fs_cookie cookie, uint8_t event, fssh_selectsync *sync);
-	fssh_status_t (*fsync)(fssh_fs_volume *volume, fssh_fs_vnode *vnode);
+	fssh_status_t (*fsync)(fssh_fs_volume *volume, fssh_fs_vnode *vnode, bool dataOnly);
 
 	fssh_status_t (*read_symlink)(fssh_fs_volume *volume, fssh_fs_vnode *link,
 				char *buffer, fssh_size_t *_bufferSize);

headers/private/kernel/vfs.h

@@ -185,7 +185,7 @@ int			_user_open_dir_entry_ref(dev_t device, ino_t inode,
 int			_user_open_dir(int fd, const char *path);
 int			_user_open_parent_dir(int fd, char *name, size_t nameLength);
 status_t	_user_fcntl(int fd, int op, size_t argument);
-status_t	_user_fsync(int fd);
+status_t	_user_fsync(int fd, bool dataOnly);
 status_t	_user_flock(int fd, int op);
 status_t	_user_read_stat(int fd, const char *path, bool traverseLink,
 				struct stat *stat, size_t statSize);

headers/private/system/syscalls.h

@@ -278,7 +278,7 @@ extern int			_kern_open_dir(int fd, const char *path);
 extern int			_kern_open_parent_dir(int fd, char *name,
 						size_t nameLength);
 extern status_t		_kern_fcntl(int fd, int op, size_t argument);
-extern status_t		_kern_fsync(int fd);
+extern status_t		_kern_fsync(int fd, bool dataOnly);
 extern status_t		_kern_flock(int fd, int op);
 extern off_t		_kern_seek(int fd, off_t pos, int seekType);
 extern status_t		_kern_create_dir_entry_ref(dev_t device, ino_t inode,