1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_RPC
41 #include <liblustre.h>
44 #include <obd_support.h>
45 #include <obd_class.h>
46 #include <lustre_lib.h>
47 #include <lustre_ha.h>
48 #include <lustre_import.h>
50 #include "ptlrpc_internal.h"
54 void ptlrpc_fill_bulk_md (lnet_md_t *md, struct ptlrpc_bulk_desc *desc)
56 LASSERT (desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
57 LASSERT (!(md->options & (LNET_MD_IOVEC | LNET_MD_KIOV | LNET_MD_PHYS)));
59 md->options |= LNET_MD_KIOV;
60 md->start = &desc->bd_iov[0];
61 md->length = desc->bd_iov_count;
64 void ptlrpc_add_bulk_page(struct ptlrpc_bulk_desc *desc, cfs_page_t *page,
65 int pageoffset, int len)
67 lnet_kiov_t *kiov = &desc->bd_iov[desc->bd_iov_count];
69 kiov->kiov_page = page;
70 kiov->kiov_offset = pageoffset;
76 void ptl_rpc_wipe_bulk_pages(struct ptlrpc_bulk_desc *desc)
80 for (i = 0; i < desc->bd_iov_count ; i++) {
81 lnet_kiov_t *kiov = &desc->bd_iov[i];
82 ClearPageUptodate(kiov->kiov_page);
83 memset(cfs_kmap(kiov->kiov_page)+kiov->kiov_offset, 0xab,
85 cfs_kunmap(kiov->kiov_page);
89 #else /* !__KERNEL__ */
91 void ptlrpc_fill_bulk_md(lnet_md_t *md, struct ptlrpc_bulk_desc *desc)
93 LASSERT (!(md->options & (LNET_MD_IOVEC | LNET_MD_KIOV | LNET_MD_PHYS)));
94 if (desc->bd_iov_count == 1) {
95 md->start = desc->bd_iov[0].iov_base;
96 md->length = desc->bd_iov[0].iov_len;
100 md->options |= LNET_MD_IOVEC;
101 md->start = &desc->bd_iov[0];
102 md->length = desc->bd_iov_count;
105 static int can_merge_iovs(lnet_md_iovec_t *existing, lnet_md_iovec_t *candidate)
107 if (existing->iov_base + existing->iov_len == candidate->iov_base)
110 /* Enable this section to provide earlier evidence of fragmented bulk */
111 CERROR("Can't merge iovs %p for %x, %p for %x\n",
112 existing->iov_base, existing->iov_len,
113 candidate->iov_base, candidate->iov_len);
118 void ptlrpc_add_bulk_page(struct ptlrpc_bulk_desc *desc, cfs_page_t *page,
119 int pageoffset, int len)
121 lnet_md_iovec_t *iov = &desc->bd_iov[desc->bd_iov_count];
123 iov->iov_base = page->addr + pageoffset;
126 if (desc->bd_iov_count > 0 && can_merge_iovs(iov - 1, iov)) {
127 (iov - 1)->iov_len += len;
129 desc->bd_iov_count++;
133 void ptl_rpc_wipe_bulk_pages(struct ptlrpc_bulk_desc *desc)
137 for(i = 0; i < desc->bd_iov_count; i++) {
138 lnet_md_iovec_t *iov = &desc->bd_iov[i];
140 memset(iov->iov_base, 0xab, iov->iov_len);
143 #endif /* !__KERNEL__ */