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authorPavel Shilovsky <piastry@etersoft.ru>2011-05-26 10:02:00 +0400
committerSteve French <sfrench@us.ibm.com>2011-05-27 07:57:16 +0400
commitd4ffff1fa9695c5b5c0bf337e208d8833b88ff2d (patch)
treeacd4b6cfa7962a1cee7e9c81f11bd9ccb0d3ff24 /fs/cifs/cifs_fs_sb.h
parent25c7f41e9234f60af30e086278f1de7974f8816f (diff)
downloadlinux-d4ffff1fa9695c5b5c0bf337e208d8833b88ff2d.tar.xz
CIFS: Add rwpidforward mount option
Add rwpidforward mount option that switches on a mode when we forward pid of a process who opened a file to any read and write operation. This can prevent applications like WINE from failing on read or write operation on a previously locked file region from the same netfd from another process if we use mandatory brlock style. It is actual for WINE because during a run of WINE program two processes work on the same netfd - share the same file struct between several VFS fds: 1) WINE-server does open and lock; 2) WINE-application does read and write. Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
Diffstat (limited to 'fs/cifs/cifs_fs_sb.h')
-rw-r--r--fs/cifs/cifs_fs_sb.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index c96b44b4e262..ffb1459dc6ec 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -41,6 +41,7 @@
#define CIFS_MOUNT_MF_SYMLINKS 0x10000 /* Minshall+French Symlinks enabled */
#define CIFS_MOUNT_MULTIUSER 0x20000 /* multiuser mount */
#define CIFS_MOUNT_STRICT_IO 0x40000 /* strict cache mode */
+#define CIFS_MOUNT_RWPIDFORWARD 0x80000 /* use pid forwarding for rw */
struct cifs_sb_info {
struct rb_root tlink_tree;