From fb89b45cdfdc8bdab93986f1bc1474e313295c31 Mon Sep 17 00:00:00 2001 From: Dominique Martinet Date: Fri, 10 Jan 2014 13:44:09 +0100 Subject: 9P: introduction of a new cache=mmap model. - Add cache=mmap option - Make mmap read-write while keeping it as synchronous as possible - Build writeback fid on mmap creation if it is writable Signed-off-by: Dominique Martinet Signed-off-by: Eric Van Hensbergen --- fs/9p/vfs_addr.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'fs/9p/vfs_addr.c') diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c index 9ff073f4090a..c71e88602ff4 100644 --- a/fs/9p/vfs_addr.c +++ b/fs/9p/vfs_addr.c @@ -202,6 +202,8 @@ static int v9fs_vfs_writepage(struct page *page, struct writeback_control *wbc) { int retval; + p9_debug(P9_DEBUG_VFS, "page %p\n", page); + retval = v9fs_vfs_writepage_locked(page); if (retval < 0) { if (retval == -EAGAIN) { @@ -282,6 +284,9 @@ static int v9fs_write_begin(struct file *filp, struct address_space *mapping, pgoff_t index = pos >> PAGE_CACHE_SHIFT; struct inode *inode = mapping->host; + + p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping); + v9inode = V9FS_I(inode); start: page = grab_cache_page_write_begin(mapping, index, flags); @@ -312,6 +317,8 @@ static int v9fs_write_end(struct file *filp, struct address_space *mapping, loff_t last_pos = pos + copied; struct inode *inode = page->mapping->host; + p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping); + if (unlikely(copied < len)) { /* * zero out the rest of the area -- cgit v1.2.3