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authorDominique Martinet <dominique.martinet@cea.fr>2014-01-10 13:44:09 +0100
committerEric Van Hensbergen <ericvh@gmail.com>2014-01-10 09:20:51 -0600
commitfb89b45cdfdc8bdab93986f1bc1474e313295c31 (patch)
treec19ec0f84315c6dc77ca2447f58e2508b76ce88a /fs/9p/vfs_addr.c
parentf94741fd2832e7abc30fbf6dc13ed627c1fcc01a (diff)
downloadlinux-fb89b45cdfdc8bdab93986f1bc1474e313295c31.tar.bz2
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 <dominique.martinet@cea.fr> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'fs/9p/vfs_addr.c')
-rw-r--r--fs/9p/vfs_addr.c7
1 files changed, 7 insertions, 0 deletions
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