From 148f948ba877f4d3cdef036b1ff6d9f68986706a Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Mon, 17 Aug 2009 19:52:36 +0200 Subject: vfs: Introduce new helpers for syncing after writing to O_SYNC file or IS_SYNC inode Introduce new function for generic inode syncing (vfs_fsync_range) and use it from fsync() path. Introduce also new helper for syncing after a sync write (generic_write_sync) using the generic function. Use these new helpers for syncing from generic VFS functions. This makes O_SYNC writes to block devices acquire i_mutex for syncing. If we really care about this, we can make block_fsync() drop the i_mutex and reacquire it before it returns. CC: Evgeniy Polyakov CC: ocfs2-devel@oss.oracle.com CC: Joel Becker CC: Felix Blyakher CC: xfs@oss.sgi.com CC: Anton Altaparmakov CC: linux-ntfs-dev@lists.sourceforge.net CC: OGAWA Hirofumi CC: linux-ext4@vger.kernel.org CC: tytso@mit.edu Acked-by: Christoph Hellwig Signed-off-by: Jan Kara --- include/linux/fs.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux/fs.h') diff --git a/include/linux/fs.h b/include/linux/fs.h index 6c1be3a..e2c7f51 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2098,7 +2098,10 @@ extern int __filemap_fdatawrite_range(struct address_space *mapping, extern int filemap_fdatawrite_range(struct address_space *mapping, loff_t start, loff_t end); +extern int vfs_fsync_range(struct file *file, struct dentry *dentry, + loff_t start, loff_t end, int datasync); extern int vfs_fsync(struct file *file, struct dentry *dentry, int datasync); +extern int generic_write_sync(struct file *file, loff_t pos, loff_t count); extern void sync_supers(void); extern void emergency_sync(void); extern void emergency_remount(void); -- cgit v1.1