CIFS: Send as many mandatory unlock ranges at once as possible
that reduces a traffic and increases a performance.
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 6a45a17..6600aa2 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -2320,6 +2320,46 @@
return rc;
}
+int cifs_lockv(const int xid, struct cifs_tcon *tcon, const __u16 netfid,
+ const __u8 lock_type, const __u32 num_unlock,
+ const __u32 num_lock, LOCKING_ANDX_RANGE *buf)
+{
+ int rc = 0;
+ LOCK_REQ *pSMB = NULL;
+ struct kvec iov[2];
+ int resp_buf_type;
+ __u16 count;
+
+ cFYI(1, "cifs_lockv num lock %d num unlock %d", num_lock, num_unlock);
+
+ rc = small_smb_init(SMB_COM_LOCKING_ANDX, 8, tcon, (void **) &pSMB);
+ if (rc)
+ return rc;
+
+ pSMB->Timeout = 0;
+ pSMB->NumberOfLocks = cpu_to_le16(num_lock);
+ pSMB->NumberOfUnlocks = cpu_to_le16(num_unlock);
+ pSMB->LockType = lock_type;
+ pSMB->AndXCommand = 0xFF; /* none */
+ pSMB->Fid = netfid; /* netfid stays le */
+
+ count = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
+ inc_rfc1001_len(pSMB, count);
+ pSMB->ByteCount = cpu_to_le16(count);
+
+ iov[0].iov_base = (char *)pSMB;
+ iov[0].iov_len = be32_to_cpu(pSMB->hdr.smb_buf_length) + 4 -
+ (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
+ iov[1].iov_base = (char *)buf;
+ iov[1].iov_len = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
+
+ cifs_stats_inc(&tcon->num_locks);
+ rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP);
+ if (rc)
+ cFYI(1, "Send error in cifs_lockv = %d", rc);
+
+ return rc;
+}
int
CIFSSMBLock(const int xid, struct cifs_tcon *tcon,