1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001 Cluster File Systems, Inc. <braam@clusterfs.com>
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.
21 * (Un)packing of OST requests
25 #define DEBUG_SUBSYSTEM S_CLASS
27 #include <linux/lustre_net.h>
29 int lustre_pack_msg(int count, int *lens, char **bufs, int *len,
30 struct lustre_msg **msg)
36 for (i = 0; i < count; i++)
37 size += size_round(lens[i]);
39 *len = size_round(sizeof(*m) + count * sizeof(__u32)) + size;
41 OBD_ALLOC(*msg, *len);
46 m->bufcount = HTON__u32(count);
47 for (i = 0; i < count; i++)
48 m->buflens[i] = HTON__u32(lens[i]);
50 ptr = (char *)m + size_round(sizeof(*m) + count * sizeof(__u32));
51 for (i = 0; i < count; i++) {
55 LOGL(tmp, lens[i], ptr);
61 /* This returns the size of the buffer that is required to hold a lustre_msg
62 * with the given sub-buffer lengths. */
63 int lustre_msg_size(int count, int *lengths)
67 for (i = 0; i < count; i++)
68 size += size_round(lengths[i]);
70 size += size_round(sizeof(struct lustre_msg) + count * sizeof(__u32));
75 int lustre_unpack_msg(struct lustre_msg *m, int len)
79 required_len = size_round(sizeof(*m));
80 if (len < required_len)
83 m->opc = NTOH__u32(m->opc);
84 m->status = NTOH__u32(m->status);
85 m->type = NTOH__u32(m->type);
86 m->bufcount = NTOH__u32(m->bufcount);
87 m->last_rcvd = NTOH__u64(m->last_rcvd);
88 m->last_committed = NTOH__u64(m->last_committed);
90 required_len = size_round(sizeof(*m) + m->bufcount * sizeof(__u32));
91 if (len < required_len)
94 for (i = 0; i < m->bufcount; i++) {
95 m->buflens[i] = NTOH__u32(m->buflens[i]);
96 required_len += size_round(m->buflens[i]);
99 if (len < required_len) {
100 CERROR("len: %d, required_len %d\n", len, required_len);
107 void *lustre_msg_buf(struct lustre_msg *m, int n)
111 if (n < 0 || n >= m->bufcount) {
112 CERROR("referencing bad sub buffer!\n");
117 if (m->buflens[n] == 0)
120 offset = size_round(sizeof(*m) + m->bufcount * sizeof(__u32));
122 for (i = 0; i < n; i++)
123 offset += size_round(m->buflens[i]);
125 return (char *)m + offset;