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_cookie = conn->oc_conn_cookie;
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;
79 conn = malloc (sizeof (*conn));
81 fprintf (stderr, "obdio_connect: no memory\n");
84 memset (conn, 0, sizeof (*conn));
86 conn->oc_fd = open ("/dev/obd", O_RDWR);
87 if (conn->oc_fd < 0) {
88 fprintf (stderr, "obdio_connect: Can't open /dev/obd: %s\n",
94 conn->oc_data.ioc_dev = device;
95 rc = obdio_ioctl (conn, OBD_IOC_DEVICE);
97 fprintf (stderr, "obdio_connect: Can't set device %d: %s\n",
98 device, strerror (errno));
102 obdio_iocinit (conn);
103 rc = obdio_ioctl (conn, OBD_IOC_CONNECT);
105 fprintf(stderr, "obdio_connect: Can't connect to device "
106 "%d: %s\n", device, strerror (errno));
110 conn->oc_conn_cookie = conn->oc_data.ioc_cookie;
119 obdio_disconnect (struct obdio_conn *conn, int flags)
122 /* obdclass will automatically close on last ref */
127 obdio_pread (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_READ));
145 obdio_pwrite (struct obdio_conn *conn, uint64_t oid,
146 char *buffer, uint32_t count, uint64_t offset)
148 obdio_iocinit (conn);
150 conn->oc_data.ioc_obdo1.o_id = oid;
151 conn->oc_data.ioc_obdo1.o_mode = S_IFREG;
152 conn->oc_data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE;
154 conn->oc_data.ioc_pbuf2 = buffer;
155 conn->oc_data.ioc_plen2 = count;
156 conn->oc_data.ioc_count = count;
157 conn->oc_data.ioc_offset = offset;
159 return (obdio_ioctl (conn, OBD_IOC_BRW_WRITE));
163 obdio_enqueue (struct obdio_conn *conn, uint64_t oid,
164 int mode, uint64_t offset, uint32_t count,
165 struct lustre_handle *lh)
169 obdio_iocinit (conn);
171 conn->oc_data.ioc_obdo1.o_id = oid;
172 conn->oc_data.ioc_obdo1.o_mode = S_IFREG;
173 conn->oc_data.ioc_obdo1.o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLMODE;
175 conn->oc_data.ioc_conn1 = mode;
176 conn->oc_data.ioc_count = count;
177 conn->oc_data.ioc_offset = offset;
179 rc = obdio_ioctl (conn, ECHO_IOC_ENQUEUE);
182 memcpy (lh, obdo_handle (&conn->oc_data.ioc_obdo1), sizeof (*lh));
188 obdio_cancel (struct obdio_conn *conn, struct lustre_handle *lh)
190 obdio_iocinit (conn);
192 memcpy (obdo_handle (&conn->oc_data.ioc_obdo1), lh, sizeof (*lh));
193 conn->oc_data.ioc_obdo1.o_valid = OBD_MD_FLHANDLE;
195 return (obdio_ioctl (conn, ECHO_IOC_CANCEL));
199 obdio_alloc_aligned_buffer (void **spacep, int size)
201 int pagesize = getpagesize();
202 void *space = malloc (size + pagesize - 1);
208 return ((void *)(((unsigned long)space + pagesize - 1) & ~(pagesize - 1)));
211 struct obdio_barrier *
212 obdio_new_barrier (uint64_t oid, uint64_t id, int npeers)
214 struct obdio_barrier *b;
216 b = (struct obdio_barrier *)malloc (sizeof (*b));
218 fprintf (stderr, "obdio_new_barrier "LPX64": Can't allocate\n", oid);
224 b->ob_npeers = npeers;
231 obdio_setup_barrier (struct obdio_conn *conn, struct obdio_barrier *b)
233 struct lustre_handle lh;
237 struct obdio_barrier *fileb;
239 if (b->ob_ordinal != 0 ||
241 fprintf (stderr, "obdio_setup_barrier: invalid parameter\n");
245 fileb = (struct obdio_barrier *) obdio_alloc_aligned_buffer (&space, getpagesize ());
247 fprintf (stderr, "obdio_setup_barrier "LPX64": Can't allocate page buffer\n",
252 memset (fileb, 0, getpagesize ());
255 rc = obdio_enqueue (conn, b->ob_oid, LCK_PW, 0, getpagesize (), &lh);
257 fprintf (stderr, "obdio_setup_barrier "LPX64": Error on enqueue: %s\n",
258 b->ob_oid, strerror (errno));
262 rc = obdio_pwrite (conn, b->ob_oid, (void *)fileb, getpagesize (), 0);
264 fprintf (stderr, "obdio_setup_barrier "LPX64": Error on write: %s\n",
265 b->ob_oid, strerror (errno));
267 rc2 = obdio_cancel (conn, &lh);
268 if (rc == 0 && rc2 != 0) {
269 fprintf (stderr, "obdio_setup_barrier "LPX64": Error on cancel: %s\n",
270 b->ob_oid, strerror (errno));
279 obdio_barrier (struct obdio_conn *conn, struct obdio_barrier *b)
281 struct lustre_handle lh;
285 struct obdio_barrier *fileb;
288 fileb = (struct obdio_barrier *) obdio_alloc_aligned_buffer (&space, getpagesize ());
290 fprintf (stderr, "obdio_barrier "LPX64": Can't allocate page buffer\n",
295 rc = obdio_enqueue (conn, b->ob_oid, LCK_PW, 0, getpagesize (), &lh);
297 fprintf (stderr, "obdio_barrier "LPX64": Error on PW enqueue: %s\n",
298 b->ob_oid, strerror (errno));
302 memset (fileb, 0xeb, getpagesize ());
303 rc = obdio_pread (conn, b->ob_oid, (void *)fileb, getpagesize (), 0);
305 fprintf (stderr, "obdio_barrier "LPX64": Error on initial read: %s\n",
306 b->ob_oid, strerror (errno));
310 if (fileb->ob_id != b->ob_id ||
311 fileb->ob_oid != b->ob_oid ||
312 fileb->ob_npeers != b->ob_npeers ||
313 fileb->ob_count >= b->ob_npeers ||
314 fileb->ob_ordinal != b->ob_ordinal) {
315 fprintf (stderr, "obdio_barrier "LPX64": corrupt on initial read\n", b->ob_id);
316 fprintf (stderr, " got ["LPX64","LPX64","LPX64","LPX64","LPX64"]\n",
317 fileb->ob_id, fileb->ob_oid, fileb->ob_npeers,
318 fileb->ob_ordinal, fileb->ob_count);
319 fprintf (stderr, " expected ["LPX64","LPX64","LPX64","LPX64","LPX64"]\n",
320 b->ob_id, b->ob_oid, b->ob_npeers,
321 b->ob_ordinal, b->ob_count);
327 if (fileb->ob_count == fileb->ob_npeers) { /* I'm the last joiner */
328 fileb->ob_count = 0; /* join count for next barrier */
329 fileb->ob_ordinal++; /* signal all joined */
332 rc = obdio_pwrite (conn, b->ob_oid, (void *)fileb, getpagesize (), 0);
334 fprintf (stderr, "obdio_barrier "LPX64": Error on initial write: %s\n",
335 b->ob_oid, strerror (errno));
340 b->ob_ordinal++; /* now I wait... */
341 while (fileb->ob_ordinal != b->ob_ordinal) {
343 rc = obdio_cancel (conn, &lh);
345 fprintf (stderr, "obdio_barrier "LPX64": Error on %s cancel: %s\n",
346 b->ob_oid, mode, strerror (errno));
351 rc = obdio_enqueue (conn, b->ob_oid, LCK_PR, 0, getpagesize (), &lh);
353 fprintf (stderr, "obdio_barrier "LPX64": Error on PR enqueue: %s\n",
354 b->ob_oid, strerror (errno));
358 memset (fileb, 0xeb, getpagesize ());
359 rc = obdio_pread (conn, b->ob_oid, (void *)fileb, getpagesize (), 0);
361 fprintf (stderr, "obdio_barrier "LPX64": Error on read: %s\n",
362 b->ob_oid, strerror (errno));
366 if (fileb->ob_id != b->ob_id ||
367 fileb->ob_oid != b->ob_oid ||
368 fileb->ob_npeers != b->ob_npeers ||
369 fileb->ob_count >= b->ob_npeers ||
370 (fileb->ob_ordinal != b->ob_ordinal - 1 &&
371 fileb->ob_ordinal != b->ob_ordinal)) {
372 fprintf (stderr, "obdio_barrier "LPX64": corrupt\n", b->ob_id);
373 fprintf (stderr, " got ["LPX64","LPX64","LPX64","LPX64","LPX64"]\n",
374 fileb->ob_id, fileb->ob_oid, fileb->ob_npeers,
375 fileb->ob_ordinal, fileb->ob_count);
376 fprintf (stderr, " expected ["LPX64","LPX64","LPX64","LPX64","LPX64"]\n",
377 b->ob_id, b->ob_oid, b->ob_npeers,
378 b->ob_ordinal, b->ob_count);
385 rc2 = obdio_cancel (conn, &lh);
386 if (rc == 0 && rc2 != 0) {
387 fprintf (stderr, "obdio_barrier "LPX64": Error on cancel: %s\n",
388 b->ob_oid, strerror (errno));