CIFS: Handle SMB2 lock flags

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>

2 files changed, 17 insertions, 0 deletions

diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index b1dedf8cb372..e4a59d1f06b1 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -537,7 +537,15 @@ smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon,
         return rc;
 }
 
+static bool
+smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2)
+{
+        return ob1->fid.persistent_fid == ob2->fid.persistent_fid &&
+               ob1->fid.volatile_fid == ob2->fid.volatile_fid;
+}
+
 struct smb_version_operations smb21_operations = {
+        .compare_fids = smb2_compare_fids,
         .setup_request = smb2_setup_request,
         .setup_async_request = smb2_setup_async_request,
         .check_receive = smb2_check_receive,
@@ -598,6 +606,10 @@ struct smb_version_operations smb21_operations = {
 
 struct smb_version_values smb21_values = {
         .version_string = SMB21_VERSION_STRING,
+        .large_lock_type = 0,
+        .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE_LOCK,
+        .shared_lock_type = SMB2_LOCKFLAG_SHARED_LOCK,
+        .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK,
         .header_size = sizeof(struct smb2_hdr),
         .max_header_size = MAX_SMB2_HDR_SIZE,
         .read_rsp_size = sizeof(struct smb2_read_rsp) - 1,
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 3c8e99ea88ad..d2d132e94155 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -526,6 +526,11 @@ struct smb2_write_rsp {
         __u8   Buffer[1];
 } __packed;
 
+#define SMB2_LOCKFLAG_SHARED_LOCK       0x0001
+#define SMB2_LOCKFLAG_EXCLUSIVE_LOCK    0x0002
+#define SMB2_LOCKFLAG_UNLOCK            0x0004
+#define SMB2_LOCKFLAG_FAIL_IMMEDIATELY  0x0010
+
 struct smb2_echo_req {
         struct smb2_hdr hdr;
         __le16 StructureSize;   /* Must be 4 */