diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/include/lustre_nrs_fifo.h')
-rw-r--r-- | drivers/staging/lustre/lustre/include/lustre_nrs_fifo.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/include/lustre_nrs_fifo.h b/drivers/staging/lustre/lustre/include/lustre_nrs_fifo.h new file mode 100644 index 000000000000..3b5418eac6c4 --- /dev/null +++ b/drivers/staging/lustre/lustre/include/lustre_nrs_fifo.h @@ -0,0 +1,70 @@ +/* + * GPL HEADER START + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 only, + * as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License version 2 for more details. + * + * You should have received a copy of the GNU General Public License + * version 2 along with this program; If not, see + * http://www.gnu.org/licenses/gpl-2.0.html + * + * GPL HEADER END + */ +/* + * Copyright (c) 2014, Intel Corporation. + * + * Copyright 2012 Xyratex Technology Limited + */ +/* + * + * Network Request Scheduler (NRS) First-in First-out (FIFO) policy + * + */ + +#ifndef _LUSTRE_NRS_FIFO_H +#define _LUSTRE_NRS_FIFO_H + +/* \name fifo + * + * FIFO policy + * + * This policy is a logical wrapper around previous, non-NRS functionality. + * It dispatches RPCs in the same order as they arrive from the network. This + * policy is currently used as the fallback policy, and the only enabled policy + * on all NRS heads of all PTLRPC service partitions. + * @{ + */ + +/** + * Private data structure for the FIFO policy + */ +struct nrs_fifo_head { + /** + * Resource object for policy instance. + */ + struct ptlrpc_nrs_resource fh_res; + /** + * List of queued requests. + */ + struct list_head fh_list; + /** + * For debugging purposes. + */ + __u64 fh_sequence; +}; + +struct nrs_fifo_req { + struct list_head fr_list; + __u64 fr_sequence; +}; + +/** @} fifo */ +#endif |