1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2003 Cluster File Systems, Inc.
5 * Author: Eric Barton <eeb@clusterfs.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or
10 * modify it under the terms of version 2 of the GNU General Public
11 * License as published by the Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Lustre; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <sys/ioctl.h>
30 #include <sys/types.h>
33 #include <liblustre.h>
37 obdio_iocinit (struct obdio_conn *conn)
39 memset (&conn->oc_data, 0, sizeof (conn->oc_data));
40 conn->oc_data.ioc_version = OBD_IOCTL_VERSION;
41 conn->oc_data.ioc_dev = conn->oc_device;
42 conn->oc_data.ioc_len = sizeof (conn->oc_data);
46 obdio_ioctl (struct obdio_conn *conn, int cmd)
48 char *buf = conn->oc_buffer;
52 rc = obd_ioctl_pack (&conn->oc_data, &buf, sizeof (conn->oc_buffer));
54 fprintf (stderr, "obdio_ioctl: obd_ioctl_pack: %d (%s)\n",
55 rc, strerror (errno));
59 rc = ioctl (conn->oc_fd, cmd, buf);
63 rc2 = obd_ioctl_unpack (&conn->oc_data, buf, sizeof (conn->oc_buffer));
65 fprintf (stderr, "obdio_ioctl: obd_ioctl_unpack: %d (%s)\n",
66 rc2, strerror (errno));
74 obdio_connect (int device)
76 struct obdio_conn *conn;
78 conn = malloc (sizeof (*conn));
80 fprintf (stderr, "obdio_connect: no memory\n");
83 memset (conn, 0, sizeof (*conn));
85 conn->oc_fd = open ("/dev/obd", O_RDWR);
86 if (conn->oc_fd < 0) {
87 fprintf (stderr, "obdio_connect: Can't open /dev/obd: %s\n",
92 conn->oc_device = device;
101 obdio_disconnect (struct obdio_conn *conn, int flags)
104 /* obdclass will automatically close on last ref */
109 obdio_pread (struct obdio_conn *conn, uint64_t oid,
110 char *buffer, uint32_t count, uint64_t offset)
112 obdio_iocinit (conn);
114 conn->oc_data.ioc_obdo1.o_id = oid;
115 conn->oc_data.ioc_obdo1.o_mode = S_IFREG;
116 conn->oc_data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE;
118 conn->oc_data.ioc_pbuf2 = buffer;
119 conn->oc_data.ioc_plen2 = count;
120 conn->oc_data.ioc_count = count;
121 conn->oc_data.ioc_offset = offset;
123 return (obdio_ioctl (conn, OBD_IOC_BRW_READ));
127 obdio_pwrite (struct obdio_conn *conn, uint64_t oid,
128 char *buffer, uint32_t count, uint64_t offset)
130 obdio_iocinit (conn);
132 conn->oc_data.ioc_obdo1.o_id = oid;
133 conn->oc_data.ioc_obdo1.o_mode = S_IFREG;
134 conn->oc_data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE;
136 conn->oc_data.ioc_pbuf2 = buffer;
137 conn->oc_data.ioc_plen2 = count;
138 conn->oc_data.ioc_count = count;
139 conn->oc_data.ioc_offset = offset;
141 return (obdio_ioctl (conn, OBD_IOC_BRW_WRITE));
145 obdio_enqueue (struct obdio_conn *conn, uint64_t oid,
146 int mode, uint64_t offset, uint32_t count,
147 struct lustre_handle *lh)
151 obdio_iocinit (conn);
153 conn->oc_data.ioc_obdo1.o_id = oid;
154 conn->oc_data.ioc_obdo1.o_mode = S_IFREG;
155 conn->oc_data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE;
157 conn->oc_data.ioc_conn1 = mode;
158 conn->oc_data.ioc_count = count;
159 conn->oc_data.ioc_offset = offset;
161 rc = obdio_ioctl (conn, ECHO_IOC_ENQUEUE);
164 memcpy (lh, obdo_handle (&conn->oc_data.ioc_obdo1), sizeof (*lh));
170 obdio_cancel (struct obdio_conn *conn, struct lustre_handle *lh)
172 obdio_iocinit (conn);
174 memcpy (obdo_handle (&conn->oc_data.ioc_obdo1), lh, sizeof (*lh));
175 conn->oc_data.ioc_obdo1.o_valid = OBD_MD_FLHANDLE;
177 return (obdio_ioctl (conn, ECHO_IOC_CANCEL));
181 obdio_alloc_aligned_buffer (void **spacep, int size)
183 int pagesize = getpagesize();
184 void *space = malloc (size + pagesize - 1);
190 return ((void *)(((unsigned long)space + pagesize - 1) & ~(pagesize - 1)));
193 struct obdio_barrier *
194 obdio_new_barrier (uint64_t oid, uint64_t id, int npeers)
196 struct obdio_barrier *b;
198 b = (struct obdio_barrier *)malloc (sizeof (*b));
200 fprintf (stderr, "obdio_new_barrier "LPX64": Can't allocate\n", oid);
206 b->ob_npeers = npeers;
213 obdio_setup_barrier (struct obdio_conn *conn, struct obdio_barrier *b)
215 struct lustre_handle lh;
219 struct obdio_barrier *fileb;
221 if (b->ob_ordinal != 0 ||
223 fprintf (stderr, "obdio_setup_barrier: invalid parameter\n");
227 fileb = (struct obdio_barrier *) obdio_alloc_aligned_buffer (&space, getpagesize ());
229 fprintf (stderr, "obdio_setup_barrier "LPX64": Can't allocate page buffer\n",
234 memset (fileb, 0, getpagesize ());
237 rc = obdio_enqueue (conn, b->ob_oid, LCK_PW, 0, getpagesize (), &lh);
239 fprintf (stderr, "obdio_setup_barrier "LPX64": Error on enqueue: %s\n",
240 b->ob_oid, strerror (errno));
244 rc = obdio_pwrite (conn, b->ob_oid, (void *)fileb, getpagesize (), 0);
246 fprintf (stderr, "obdio_setup_barrier "LPX64": Error on write: %s\n",
247 b->ob_oid, strerror (errno));
249 rc2 = obdio_cancel (conn, &lh);
250 if (rc == 0 && rc2 != 0) {
251 fprintf (stderr, "obdio_setup_barrier "LPX64": Error on cancel: %s\n",
252 b->ob_oid, strerror (errno));
261 obdio_barrier (struct obdio_conn *conn, struct obdio_barrier *b)
263 struct lustre_handle lh;
267 struct obdio_barrier *fileb;
270 fileb = (struct obdio_barrier *) obdio_alloc_aligned_buffer (&space, getpagesize ());
272 fprintf (stderr, "obdio_barrier "LPX64": Can't allocate page buffer\n",
277 rc = obdio_enqueue (conn, b->ob_oid, LCK_PW, 0, getpagesize (), &lh);
279 fprintf (stderr, "obdio_barrier "LPX64": Error on PW enqueue: %s\n",
280 b->ob_oid, strerror (errno));
284 memset (fileb, 0xeb, getpagesize ());
285 rc = obdio_pread (conn, b->ob_oid, (void *)fileb, getpagesize (), 0);
287 fprintf (stderr, "obdio_barrier "LPX64": Error on initial read: %s\n",
288 b->ob_oid, strerror (errno));
292 if (fileb->ob_id != b->ob_id ||
293 fileb->ob_oid != b->ob_oid ||
294 fileb->ob_npeers != b->ob_npeers ||
295 fileb->ob_count >= b->ob_npeers ||
296 fileb->ob_ordinal != b->ob_ordinal) {
297 fprintf (stderr, "obdio_barrier "LPX64": corrupt on initial read\n", b->ob_id);
298 fprintf (stderr, " got ["LPX64","LPX64","LPX64","LPX64","LPX64"]\n",
299 fileb->ob_id, fileb->ob_oid, fileb->ob_npeers,
300 fileb->ob_ordinal, fileb->ob_count);
301 fprintf (stderr, " expected ["LPX64","LPX64","LPX64","LPX64","LPX64"]\n",
302 b->ob_id, b->ob_oid, b->ob_npeers,
303 b->ob_ordinal, b->ob_count);
309 if (fileb->ob_count == fileb->ob_npeers) { /* I'm the last joiner */
310 fileb->ob_count = 0; /* join count for next barrier */
311 fileb->ob_ordinal++; /* signal all joined */
314 rc = obdio_pwrite (conn, b->ob_oid, (void *)fileb, getpagesize (), 0);
316 fprintf (stderr, "obdio_barrier "LPX64": Error on initial write: %s\n",
317 b->ob_oid, strerror (errno));
322 b->ob_ordinal++; /* now I wait... */
323 while (fileb->ob_ordinal != b->ob_ordinal) {
325 rc = obdio_cancel (conn, &lh);
327 fprintf (stderr, "obdio_barrier "LPX64": Error on %s cancel: %s\n",
328 b->ob_oid, mode, strerror (errno));
333 rc = obdio_enqueue (conn, b->ob_oid, LCK_PR, 0, getpagesize (), &lh);
335 fprintf (stderr, "obdio_barrier "LPX64": Error on PR enqueue: %s\n",
336 b->ob_oid, strerror (errno));
340 memset (fileb, 0xeb, getpagesize ());
341 rc = obdio_pread (conn, b->ob_oid, (void *)fileb, getpagesize (), 0);
343 fprintf (stderr, "obdio_barrier "LPX64": Error on read: %s\n",
344 b->ob_oid, strerror (errno));
348 if (fileb->ob_id != b->ob_id ||
349 fileb->ob_oid != b->ob_oid ||
350 fileb->ob_npeers != b->ob_npeers ||
351 fileb->ob_count >= b->ob_npeers ||
352 (fileb->ob_ordinal != b->ob_ordinal - 1 &&
353 fileb->ob_ordinal != b->ob_ordinal)) {
354 fprintf (stderr, "obdio_barrier "LPX64": corrupt\n", b->ob_id);
355 fprintf (stderr, " got ["LPX64","LPX64","LPX64","LPX64","LPX64"]\n",
356 fileb->ob_id, fileb->ob_oid, fileb->ob_npeers,
357 fileb->ob_ordinal, fileb->ob_count);
358 fprintf (stderr, " expected ["LPX64","LPX64","LPX64","LPX64","LPX64"]\n",
359 b->ob_id, b->ob_oid, b->ob_npeers,
360 b->ob_ordinal, b->ob_count);
367 rc2 = obdio_cancel (conn, &lh);
368 if (rc == 0 && rc2 != 0) {
369 fprintf (stderr, "obdio_barrier "LPX64": Error on cancel: %s\n",
370 b->ob_oid, strerror (errno));