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authorDavid Howells <dhowells@redhat.com>2013-09-04 17:10:39 +0000
committerSteve French <smfrench@gmail.com>2013-09-18 10:17:03 -0500
commit54afa99057ee2ffd3df0f5e891298bbbb65ea63c (patch)
treebbe235d0310023e4c4eace892b1de10faee13c3f /fs/cifs/fscache.c
parent62d228b8c676232eca579f91cc0782b060a59097 (diff)
downloadlinux-54afa99057ee2ffd3df0f5e891298bbbb65ea63c.tar.bz2
CIFS: FS-Cache: Uncache unread pages in cifs_readpages() before freeing them
In cifs_readpages(), we may decide we don't want to read a page after all - but the page may already have passed through fscache_read_or_alloc_pages() and thus have marks and reservations set. Thus we have to call fscache_readpages_cancel() or fscache_uncache_page() on the pages we're returning to clear the marks. NFS, AFS and 9P should be unaffected by this as they call read_cache_pages() which does the cleanup for you. Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/fscache.c')
-rw-r--r--fs/cifs/fscache.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c
index 2f4bc5a58054..b3258f35e88a 100644
--- a/fs/cifs/fscache.c
+++ b/fs/cifs/fscache.c
@@ -223,6 +223,13 @@ void __cifs_readpage_to_fscache(struct inode *inode, struct page *page)
fscache_uncache_page(CIFS_I(inode)->fscache, page);
}
+void __cifs_fscache_readpages_cancel(struct inode *inode, struct list_head *pages)
+{
+ cifs_dbg(FYI, "%s: (fsc: %p, i: %p)\n",
+ __func__, CIFS_I(inode)->fscache, inode);
+ fscache_readpages_cancel(CIFS_I(inode)->fscache, pages);
+}
+
void __cifs_fscache_invalidate_page(struct page *page, struct inode *inode)
{
struct cifsInodeInfo *cifsi = CIFS_I(inode);