1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2004 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #define DEBUG_SUBSYSTEM S_RPC
26 #include <liblustre.h>
29 #include <linux/obd_support.h>
30 #include <linux/obd_class.h>
31 #include <linux/lustre_lib.h>
32 #include <linux/lustre_ha.h>
33 #include <linux/lustre_import.h>
35 #include "ptlrpc_internal.h"
39 void pers_bulk_add_page(struct ptlrpc_bulk_desc *desc, struct page *page,
40 int pageoffset, int len)
42 ptl_kiov_t *kiov = &desc->bd_iov[desc->bd_iov_count];
44 kiov->kiov_page = page;
45 kiov->kiov_offset = pageoffset;
51 void pers_bulk_add_page(struct ptlrpc_bulk_desc *desc, struct page *page,
52 int pageoffset, int len)
54 struct iovec *iov = &desc->bd_iov[desc->bd_iov_count];
56 /* Should get a compiler warning if sizeof(physaddr) > sizeof(void *) */
57 iov->iov_base = (void *)(page_to_phys(page) + pageoffset);
64 #else /* !__KERNEL__ */
66 int can_merge_iovs(struct iovec *existing, struct iovec *candidate)
68 if (existing->iov_base + existing->iov_len == candidate->iov_base)
72 void pers_bulk_add_page(struct ptlrpc_bulk_desc *desc, struct page *page,
73 int pageoffset, int len)
75 struct iovec *iov = &desc->bd_iov[desc->bd_iov_count];
77 iov->iov_base = page->addr + pageoffset;
80 if (desc->bd_iov_count > 0 && can_merge_iovs(iov - 1, iov)) {
81 (iov - 1)->iov_len += len;