From 787aded65044e4cabefcf7eb7576c2dd6b151468 Mon Sep 17 00:00:00 2001 From: Namjae Jeon Date: Fri, 22 Aug 2014 14:22:51 +0900 Subject: cifs: Allow directIO read/write during cache=strict Currently cifs have all or nothing approach for directIO operations. cache=strict mode does not allow directIO while cache=none mode performs all the operations as directIO even when user does not specify O_DIRECT flag. This patch enables strict cache mode to honour directIO semantics. Signed-off-by: Namjae Jeon Signed-off-by: Ashish Sangwan Signed-off-by: Steve French --- fs/cifs/dir.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'fs/cifs/dir.c') diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index 3db0c5fd9a11..6cbd9c688cfe 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -497,6 +497,14 @@ cifs_atomic_open(struct inode *inode, struct dentry *direntry, goto out; } + if (file->f_flags & O_DIRECT && + CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) { + if (CIFS_SB(inode->i_sb)->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) + file->f_op = &cifs_file_direct_nobrl_ops; + else + file->f_op = &cifs_file_direct_ops; + } + file_info = cifs_new_fileinfo(&fid, file, tlink, oplock); if (file_info == NULL) { if (server->ops->close) -- cgit v1.2.3