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authorNamjae Jeon <namjae.jeon@samsung.com>2014-08-22 14:22:51 +0900
committerSteve French <smfrench@gmail.com>2014-08-22 00:20:39 -0500
commit787aded65044e4cabefcf7eb7576c2dd6b151468 (patch)
tree43f16f4b5407733662fd975ca8156aef5e545fb4 /fs/cifs
parentd4a029d21556437b09ffb3207cf2871651bec38f (diff)
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 <namjae.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com> Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs')
-rw-r--r--fs/cifs/dir.c8
-rw-r--r--fs/cifs/file.c8
2 files changed, 16 insertions, 0 deletions
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 3db0c5fd9a1..6cbd9c688cf 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)
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index d5fec92e036..7c018a1c52f 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -467,6 +467,14 @@ int cifs_open(struct inode *inode, struct file *file)
cifs_dbg(FYI, "inode = 0x%p file flags are 0x%x for %s\n",
inode, file->f_flags, full_path);
+ if (file->f_flags & O_DIRECT &&
+ cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) {
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
+ file->f_op = &cifs_file_direct_nobrl_ops;
+ else
+ file->f_op = &cifs_file_direct_ops;
+ }
+
if (server->oplocks)
oplock = REQ_OPLOCK;
else