CIFS: Add SMB2.1 lease break support
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 89d2824..1572abe 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -911,7 +911,6 @@
{
char *data_offset;
struct create_lease *lc;
- __u8 oplock = 0;
bool found = false;
data_offset = (char *)rsp;
@@ -932,19 +931,9 @@
} while (le32_to_cpu(lc->ccontext.Next) != 0);
if (!found)
- return oplock;
+ return 0;
- if (le32_to_cpu(lc->lcontext.LeaseState) & SMB2_LEASE_WRITE_CACHING) {
- if (le32_to_cpu(lc->lcontext.LeaseState) &
- SMB2_LEASE_HANDLE_CACHING)
- oplock = SMB2_OPLOCK_LEVEL_BATCH;
- else
- oplock = SMB2_OPLOCK_LEVEL_EXCLUSIVE;
- } else if (le32_to_cpu(lc->lcontext.LeaseState) &
- SMB2_LEASE_READ_CACHING)
- oplock = SMB2_OPLOCK_LEVEL_II;
-
- return oplock;
+ return smb2_map_lease_to_oplock(lc->lcontext.LeaseState);
}
int
@@ -2228,3 +2217,34 @@
return smb2_lockv(xid, tcon, persist_fid, volatile_fid, pid, 1, &lock);
}
+
+int
+SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
+ __u8 *lease_key, const __le32 lease_state)
+{
+ int rc;
+ struct smb2_lease_ack *req = NULL;
+
+ cFYI(1, "SMB2_lease_break");
+ rc = small_smb2_init(SMB2_OPLOCK_BREAK, tcon, (void **) &req);
+
+ if (rc)
+ return rc;
+
+ req->hdr.CreditRequest = cpu_to_le16(1);
+ req->StructureSize = cpu_to_le16(36);
+ inc_rfc1001_len(req, 12);
+
+ memcpy(req->LeaseKey, lease_key, 16);
+ req->LeaseState = lease_state;
+
+ rc = SendReceiveNoRsp(xid, tcon->ses, (char *) req, CIFS_OBREAK_OP);
+ /* SMB2 buffer freed by function above */
+
+ if (rc) {
+ cifs_stats_fail_inc(tcon, SMB2_OPLOCK_BREAK_HE);
+ cFYI(1, "Send error in Lease Break = %d", rc);
+ }
+
+ return rc;
+}