xen-vtx-unstable

annotate tools/xenstore/xs.c @ 6008:f5b8d2720d6c

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libxenstore (used to access the daemon) should be licensed under LGPL.
There are several people I am aware of interested in writing non-GPL
tools, and this code is trivial, so they'd just end up writing their
own.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
author kaf24@firebug.cl.cam.ac.uk
date Thu Aug 04 08:57:37 2005 +0000 (2005-08-04)
parents f294acb25858
children a9ee400a5da9
rev   line source
cl349@5357 1 /*
cl349@5357 2 Xen Store Daemon interface providing simple tree-like database.
cl349@5357 3 Copyright (C) 2005 Rusty Russell IBM Corporation
cl349@5357 4
kaf24@6008 5 This library is free software; you can redistribute it and/or
kaf24@6008 6 modify it under the terms of the GNU Lesser General Public
kaf24@6008 7 License as published by the Free Software Foundation; either
kaf24@6008 8 version 2.1 of the License, or (at your option) any later version.
cl349@5357 9
kaf24@6008 10 This library is distributed in the hope that it will be useful,
cl349@5357 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
kaf24@6008 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
kaf24@6008 13 Lesser General Public License for more details.
cl349@5357 14
kaf24@6008 15 You should have received a copy of the GNU Lesser General Public
kaf24@6008 16 License along with this library; if not, write to the Free Software
kaf24@6008 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
cl349@5357 18 */
cl349@5357 19
cl349@5357 20 #include <sys/types.h>
cl349@5357 21 #include <sys/stat.h>
cl349@5357 22 #include <fcntl.h>
cl349@5357 23 #include <sys/socket.h>
cl349@5357 24 #include <sys/un.h>
cl349@5357 25 #include <string.h>
cl349@5357 26 #include <unistd.h>
cl349@5357 27 #include <stdbool.h>
cl349@5357 28 #include <stdlib.h>
cl349@5357 29 #include <assert.h>
cl349@5357 30 #include <stdio.h>
cl349@5357 31 #include <signal.h>
cl349@5357 32 #include <stdint.h>
cl349@5357 33 #include <errno.h>
cl349@5357 34 #include "xs.h"
cl349@5357 35 #include "xenstored.h"
cl349@5357 36 #include "xs_lib.h"
cl349@5357 37 #include "utils.h"
cl349@5357 38
cl349@5357 39 struct xs_handle
cl349@5357 40 {
cl349@5357 41 int fd;
cl349@5357 42 };
cl349@5357 43
cl349@5357 44 /* Get the socket from the store daemon handle.
cl349@5357 45 */
cl349@5357 46 int xs_fileno(struct xs_handle *h)
cl349@5357 47 {
cl349@5357 48 return h->fd;
cl349@5357 49 }
cl349@5357 50
cl349@5357 51 static struct xs_handle *get_socket(const char *connect_to)
cl349@5357 52 {
cl349@5357 53 struct sockaddr_un addr;
cl349@5357 54 int sock, saved_errno;
cl349@5357 55 struct xs_handle *h = NULL;
cl349@5357 56
cl349@5357 57 sock = socket(PF_UNIX, SOCK_STREAM, 0);
cl349@5357 58 if (sock < 0)
cl349@5357 59 return NULL;
cl349@5357 60
cl349@5357 61 addr.sun_family = AF_UNIX;
cl349@5357 62 strcpy(addr.sun_path, connect_to);
cl349@5357 63
cl349@5357 64 if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) == 0) {
cl349@5357 65 h = malloc(sizeof(*h));
cl349@5357 66 if (h) {
cl349@5357 67 h->fd = sock;
cl349@5357 68 return h;
cl349@5357 69 }
cl349@5357 70 }
cl349@5357 71
cl349@5357 72 saved_errno = errno;
cl349@5357 73 close(sock);
cl349@5357 74 free(h);
cl349@5357 75 errno = saved_errno;
cl349@5357 76 return NULL;
cl349@5357 77 }
cl349@5357 78
cl349@5357 79 struct xs_handle *xs_daemon_open(void)
cl349@5357 80 {
cl349@5357 81 return get_socket(xs_daemon_socket());
cl349@5357 82 }
cl349@5357 83
cl349@5357 84 struct xs_handle *xs_daemon_open_readonly(void)
cl349@5357 85 {
cl349@5357 86 return get_socket(xs_daemon_socket_ro());
cl349@5357 87 }
cl349@5357 88
cl349@5357 89 void xs_daemon_close(struct xs_handle *h)
cl349@5357 90 {
cl349@5357 91 if (h->fd >= 0)
cl349@5357 92 close(h->fd);
cl349@5357 93 free(h);
cl349@5357 94 }
cl349@5357 95
cl349@5357 96 static bool read_all(int fd, void *data, unsigned int len)
cl349@5357 97 {
cl349@5357 98 while (len) {
cl349@5357 99 int done;
cl349@5357 100
cl349@5357 101 done = read(fd, data, len);
cl349@5357 102 if (done < 0) {
cl349@5357 103 if (errno == EINTR)
cl349@5357 104 continue;
cl349@5357 105 return false;
cl349@5357 106 }
cl349@5357 107 if (done == 0) {
cl349@5357 108 /* It closed fd on us? EBADF is appropriate. */
cl349@5357 109 errno = EBADF;
cl349@5357 110 return false;
cl349@5357 111 }
cl349@5357 112 data += done;
cl349@5357 113 len -= done;
cl349@5357 114 }
cl349@5357 115
cl349@5357 116 return true;
cl349@5357 117 }
cl349@5357 118
cl349@5357 119 #ifdef XSTEST
cl349@5357 120 #define read_all read_all_choice
kaf24@5423 121 #define xs_write_all write_all_choice
cl349@5357 122 #endif
cl349@5357 123
cl349@5357 124 static int get_error(const char *errorstring)
cl349@5357 125 {
cl349@5357 126 unsigned int i;
cl349@5357 127
cl349@5357 128 for (i = 0; !streq(errorstring, xsd_errors[i].errstring); i++)
cl349@5357 129 if (i == ARRAY_SIZE(xsd_errors) - 1)
cl349@5357 130 return EINVAL;
cl349@5357 131 return xsd_errors[i].errnum;
cl349@5357 132 }
cl349@5357 133
cl349@5522 134 /* Adds extra nul terminator, because we generally (always?) hold strings. */
cl349@5357 135 static void *read_reply(int fd, enum xsd_sockmsg_type *type, unsigned int *len)
cl349@5357 136 {
cl349@5357 137 struct xsd_sockmsg msg;
cl349@5357 138 void *ret;
cl349@5357 139 int saved_errno;
cl349@5357 140
cl349@5357 141 if (!read_all(fd, &msg, sizeof(msg)))
cl349@5357 142 return NULL;
cl349@5357 143
cl349@5522 144 ret = malloc(msg.len + 1);
cl349@5357 145 if (!ret)
cl349@5357 146 return NULL;
cl349@5357 147
cl349@5357 148 if (!read_all(fd, ret, msg.len)) {
cl349@5357 149 saved_errno = errno;
cl349@5357 150 free(ret);
cl349@5357 151 errno = saved_errno;
cl349@5357 152 return NULL;
cl349@5357 153 }
cl349@5357 154
cl349@5357 155 *type = msg.type;
cl349@5357 156 if (len)
cl349@5357 157 *len = msg.len;
cl349@5522 158 ((char *)ret)[msg.len] = '\0';
cl349@5357 159 return ret;
cl349@5357 160 }
cl349@5357 161
cl349@5357 162 /* Send message to xs, get malloc'ed reply. NULL and set errno on error. */
cl349@5357 163 static void *xs_talkv(struct xs_handle *h, enum xsd_sockmsg_type type,
cl349@5478 164 const struct iovec *iovec, unsigned int num_vecs,
cl349@5357 165 unsigned int *len)
cl349@5357 166 {
cl349@5357 167 struct xsd_sockmsg msg;
cl349@5357 168 void *ret = NULL;
cl349@5357 169 int saved_errno;
cl349@5357 170 unsigned int i;
cl349@5357 171 struct sigaction ignorepipe, oldact;
cl349@5357 172
cl349@5357 173 msg.type = type;
cl349@5357 174 msg.len = 0;
cl349@5357 175 for (i = 0; i < num_vecs; i++)
cl349@5357 176 msg.len += iovec[i].iov_len;
cl349@5357 177
cl349@5357 178 ignorepipe.sa_handler = SIG_IGN;
cl349@5357 179 sigemptyset(&ignorepipe.sa_mask);
cl349@5357 180 ignorepipe.sa_flags = 0;
cl349@5357 181 sigaction(SIGPIPE, &ignorepipe, &oldact);
cl349@5357 182
kaf24@5423 183 if (!xs_write_all(h->fd, &msg, sizeof(msg)))
cl349@5357 184 goto fail;
cl349@5357 185
cl349@5357 186 for (i = 0; i < num_vecs; i++)
kaf24@5423 187 if (!xs_write_all(h->fd, iovec[i].iov_base, iovec[i].iov_len))
cl349@5357 188 goto fail;
cl349@5357 189
cl349@5357 190 /* Watches can have fired before reply comes: daemon detects
cl349@5357 191 * and re-transmits, so we can ignore this. */
cl349@5357 192 do {
cl349@5357 193 free(ret);
cl349@5357 194 ret = read_reply(h->fd, &msg.type, len);
cl349@5357 195 if (!ret)
cl349@5357 196 goto fail;
cl349@5357 197 } while (msg.type == XS_WATCH_EVENT);
cl349@5357 198
cl349@5357 199 sigaction(SIGPIPE, &oldact, NULL);
cl349@5357 200 if (msg.type == XS_ERROR) {
cl349@5357 201 saved_errno = get_error(ret);
cl349@5357 202 free(ret);
cl349@5357 203 errno = saved_errno;
cl349@5357 204 return NULL;
cl349@5357 205 }
cl349@5357 206
cl349@5357 207 assert(msg.type == type);
cl349@5357 208 return ret;
cl349@5357 209
cl349@5357 210 fail:
cl349@5357 211 /* We're in a bad state, so close fd. */
cl349@5357 212 saved_errno = errno;
cl349@5357 213 sigaction(SIGPIPE, &oldact, NULL);
cl349@5357 214 close(h->fd);
cl349@5357 215 h->fd = -1;
cl349@5357 216 errno = saved_errno;
cl349@5357 217 return NULL;
cl349@5357 218 }
cl349@5357 219
cl349@5357 220 /* free(), but don't change errno. */
cl349@5357 221 static void free_no_errno(void *p)
cl349@5357 222 {
cl349@5357 223 int saved_errno = errno;
cl349@5357 224 free(p);
cl349@5357 225 errno = saved_errno;
cl349@5357 226 }
cl349@5357 227
cl349@5357 228 /* Simplified version of xs_talkv: single message. */
cl349@5357 229 static void *xs_single(struct xs_handle *h, enum xsd_sockmsg_type type,
cl349@5357 230 const char *string, unsigned int *len)
cl349@5357 231 {
cl349@5357 232 struct iovec iovec;
cl349@5357 233
cl349@5357 234 iovec.iov_base = (void *)string;
cl349@5357 235 iovec.iov_len = strlen(string) + 1;
cl349@5357 236 return xs_talkv(h, type, &iovec, 1, len);
cl349@5357 237 }
cl349@5357 238
cl349@5357 239 static bool xs_bool(char *reply)
cl349@5357 240 {
cl349@5357 241 if (!reply)
cl349@5357 242 return false;
cl349@5357 243 free(reply);
cl349@5357 244 return true;
cl349@5357 245 }
cl349@5357 246
cl349@5357 247 char **xs_directory(struct xs_handle *h, const char *path, unsigned int *num)
cl349@5357 248 {
cl349@5357 249 char *strings, *p, **ret;
cl349@5357 250 unsigned int len;
cl349@5357 251
cl349@5357 252 strings = xs_single(h, XS_DIRECTORY, path, &len);
cl349@5357 253 if (!strings)
cl349@5357 254 return NULL;
cl349@5357 255
cl349@5357 256 /* Count the strings. */
kaf24@5423 257 *num = xs_count_strings(strings, len);
cl349@5357 258
cl349@5357 259 /* Transfer to one big alloc for easy freeing. */
cl349@5357 260 ret = malloc(*num * sizeof(char *) + len);
cl349@5357 261 if (!ret) {
cl349@5357 262 free_no_errno(strings);
cl349@5357 263 return NULL;
cl349@5357 264 }
cl349@5357 265 memcpy(&ret[*num], strings, len);
cl349@5357 266 free_no_errno(strings);
cl349@5357 267
cl349@5357 268 strings = (char *)&ret[*num];
cl349@5357 269 for (p = strings, *num = 0; p < strings + len; p += strlen(p) + 1)
cl349@5357 270 ret[(*num)++] = p;
cl349@5357 271 return ret;
cl349@5357 272 }
cl349@5357 273
cl349@5522 274 /* Get the value of a single file, nul terminated.
cl349@5357 275 * Returns a malloced value: call free() on it after use.
cl349@5522 276 * len indicates length in bytes, not including the nul.
cl349@5357 277 */
cl349@5357 278 void *xs_read(struct xs_handle *h, const char *path, unsigned int *len)
cl349@5357 279 {
cl349@5357 280 return xs_single(h, XS_READ, path, len);
cl349@5357 281 }
cl349@5357 282
cl349@5357 283 /* Write the value of a single file.
cl349@5357 284 * Returns false on failure. createflags can be 0, O_CREAT, or O_CREAT|O_EXCL.
cl349@5357 285 */
cl349@5357 286 bool xs_write(struct xs_handle *h, const char *path,
cl349@5357 287 const void *data, unsigned int len, int createflags)
cl349@5357 288 {
cl349@5357 289 const char *flags;
cl349@5357 290 struct iovec iovec[3];
cl349@5357 291
cl349@5357 292 /* Format: Flags (as string), path, data. */
cl349@5357 293 if (createflags == 0)
cl349@5357 294 flags = XS_WRITE_NONE;
cl349@5357 295 else if (createflags == O_CREAT)
cl349@5357 296 flags = XS_WRITE_CREATE;
cl349@5357 297 else if (createflags == (O_CREAT|O_EXCL))
cl349@5357 298 flags = XS_WRITE_CREATE_EXCL;
cl349@5357 299 else {
cl349@5357 300 errno = EINVAL;
cl349@5357 301 return false;
cl349@5357 302 }
cl349@5357 303
cl349@5357 304 iovec[0].iov_base = (void *)path;
cl349@5357 305 iovec[0].iov_len = strlen(path) + 1;
cl349@5357 306 iovec[1].iov_base = (void *)flags;
cl349@5357 307 iovec[1].iov_len = strlen(flags) + 1;
cl349@5357 308 iovec[2].iov_base = (void *)data;
cl349@5357 309 iovec[2].iov_len = len;
cl349@5357 310
cl349@5357 311 return xs_bool(xs_talkv(h, XS_WRITE, iovec, ARRAY_SIZE(iovec), NULL));
cl349@5357 312 }
cl349@5357 313
cl349@5357 314 /* Create a new directory.
cl349@5357 315 * Returns false on failure.
cl349@5357 316 */
cl349@5357 317 bool xs_mkdir(struct xs_handle *h, const char *path)
cl349@5357 318 {
cl349@5357 319 return xs_bool(xs_single(h, XS_MKDIR, path, NULL));
cl349@5357 320 }
cl349@5357 321
cl349@5357 322 /* Destroy a file or directory (directories must be empty).
cl349@5357 323 * Returns false on failure.
cl349@5357 324 */
cl349@5357 325 bool xs_rm(struct xs_handle *h, const char *path)
cl349@5357 326 {
cl349@5357 327 return xs_bool(xs_single(h, XS_RM, path, NULL));
cl349@5357 328 }
cl349@5357 329
cl349@5357 330 /* Get permissions of node (first element is owner).
cl349@5357 331 * Returns malloced array, or NULL: call free() after use.
cl349@5357 332 */
cl349@5357 333 struct xs_permissions *xs_get_permissions(struct xs_handle *h,
cl349@5478 334 const char *path, unsigned int *num)
cl349@5357 335 {
cl349@5357 336 char *strings;
cl349@5357 337 unsigned int len;
cl349@5357 338 struct xs_permissions *ret;
cl349@5357 339
cl349@5357 340 strings = xs_single(h, XS_GET_PERMS, path, &len);
cl349@5357 341 if (!strings)
cl349@5357 342 return NULL;
cl349@5357 343
cl349@5357 344 /* Count the strings: each one perms then domid. */
kaf24@5423 345 *num = xs_count_strings(strings, len);
cl349@5357 346
cl349@5357 347 /* Transfer to one big alloc for easy freeing. */
cl349@5357 348 ret = malloc(*num * sizeof(struct xs_permissions));
cl349@5357 349 if (!ret) {
cl349@5357 350 free_no_errno(strings);
cl349@5357 351 return NULL;
cl349@5357 352 }
cl349@5357 353
kaf24@5423 354 if (!xs_strings_to_perms(ret, *num, strings)) {
cl349@5357 355 free_no_errno(ret);
cl349@5357 356 ret = NULL;
cl349@5357 357 }
cl349@5357 358
cl349@5357 359 free(strings);
cl349@5357 360 return ret;
cl349@5357 361 }
cl349@5357 362
cl349@5357 363 /* Set permissions of node (must be owner).
cl349@5357 364 * Returns false on failure.
cl349@5357 365 */
cl349@5357 366 bool xs_set_permissions(struct xs_handle *h, const char *path,
cl349@5357 367 struct xs_permissions *perms,
cl349@5357 368 unsigned int num_perms)
cl349@5357 369 {
cl349@5357 370 unsigned int i;
cl349@5357 371 struct iovec iov[1+num_perms];
cl349@5357 372
cl349@5357 373 iov[0].iov_base = (void *)path;
cl349@5357 374 iov[0].iov_len = strlen(path) + 1;
cl349@5357 375
cl349@5357 376 for (i = 0; i < num_perms; i++) {
cl349@5357 377 char buffer[MAX_STRLEN(domid_t)+1];
cl349@5357 378
kaf24@5423 379 if (!xs_perm_to_string(&perms[i], buffer))
cl349@5357 380 goto unwind;
cl349@5357 381
cl349@5357 382 iov[i+1].iov_base = strdup(buffer);
cl349@5357 383 iov[i+1].iov_len = strlen(buffer) + 1;
cl349@5357 384 if (!iov[i+1].iov_base)
cl349@5357 385 goto unwind;
cl349@5357 386 }
cl349@5357 387
cl349@5357 388 if (!xs_bool(xs_talkv(h, XS_SET_PERMS, iov, 1+num_perms, NULL)))
cl349@5357 389 goto unwind;
cl349@5357 390 for (i = 0; i < num_perms; i++)
cl349@5357 391 free(iov[i+1].iov_base);
cl349@5357 392 return true;
cl349@5357 393
cl349@5357 394 unwind:
cl349@5357 395 num_perms = i;
cl349@5357 396 for (i = 0; i < num_perms; i++)
cl349@5357 397 free_no_errno(iov[i+1].iov_base);
cl349@5357 398 return false;
cl349@5357 399 }
cl349@5357 400
cl349@5357 401 /* Watch a node for changes (poll on fd to detect, or call read_watch()).
cl349@5357 402 * When the node (or any child) changes, fd will become readable.
cl349@5478 403 * Token is returned when watch is read, to allow matching.
cl349@5357 404 * Returns false on failure.
cl349@5357 405 */
cl349@5856 406 bool xs_watch(struct xs_handle *h, const char *path, const char *token)
cl349@5357 407 {
cl349@5856 408 struct iovec iov[2];
cl349@5357 409
cl349@5357 410 iov[0].iov_base = (void *)path;
cl349@5357 411 iov[0].iov_len = strlen(path) + 1;
cl349@5478 412 iov[1].iov_base = (void *)token;
cl349@5478 413 iov[1].iov_len = strlen(token) + 1;
cl349@5357 414
cl349@5357 415 return xs_bool(xs_talkv(h, XS_WATCH, iov, ARRAY_SIZE(iov), NULL));
cl349@5357 416 }
cl349@5357 417
cl349@5357 418 /* Find out what node change was on (will block if nothing pending).
cl349@5478 419 * Returns array of two pointers: path and token, or NULL.
cl349@5478 420 * Call free() after use.
cl349@5357 421 */
cl349@5478 422 char **xs_read_watch(struct xs_handle *h)
cl349@5357 423 {
cl349@5357 424 struct xsd_sockmsg msg;
cl349@5478 425 char **ret;
cl349@5357 426
cl349@5357 427 if (!read_all(h->fd, &msg, sizeof(msg)))
cl349@5357 428 return NULL;
cl349@5357 429
cl349@5357 430 assert(msg.type == XS_WATCH_EVENT);
cl349@5478 431 ret = malloc(sizeof(char *)*2 + msg.len);
cl349@5478 432 if (!ret)
cl349@5357 433 return NULL;
cl349@5357 434
cl349@5478 435 ret[0] = (char *)(ret + 2);
cl349@5478 436 if (!read_all(h->fd, ret[0], msg.len)) {
cl349@5478 437 free_no_errno(ret);
cl349@5357 438 return NULL;
cl349@5357 439 }
cl349@5478 440 ret[1] = ret[0] + strlen(ret[0]) + 1;
cl349@5478 441 return ret;
cl349@5357 442 }
cl349@5357 443
cl349@5357 444 /* Acknowledge watch on node. Watches must be acknowledged before
cl349@5357 445 * any other watches can be read.
cl349@5357 446 * Returns false on failure.
cl349@5357 447 */
cl349@5478 448 bool xs_acknowledge_watch(struct xs_handle *h, const char *token)
cl349@5357 449 {
cl349@5478 450 return xs_bool(xs_single(h, XS_WATCH_ACK, token, NULL));
cl349@5357 451 }
cl349@5357 452
cl349@5357 453 /* Remove a watch on a node.
cl349@5357 454 * Returns false on failure (no watch on that node).
cl349@5357 455 */
cl349@5478 456 bool xs_unwatch(struct xs_handle *h, const char *path, const char *token)
cl349@5357 457 {
cl349@5478 458 struct iovec iov[2];
cl349@5478 459
cl349@5478 460 iov[0].iov_base = (char *)path;
cl349@5478 461 iov[0].iov_len = strlen(path) + 1;
cl349@5478 462 iov[1].iov_base = (char *)token;
cl349@5478 463 iov[1].iov_len = strlen(token) + 1;
cl349@5478 464
cl349@5478 465 return xs_bool(xs_talkv(h, XS_UNWATCH, iov, ARRAY_SIZE(iov), NULL));
cl349@5357 466 }
cl349@5357 467
cl349@5357 468 /* Start a transaction: changes by others will not be seen during this
cl349@5357 469 * transaction, and changes will not be visible to others until end.
cl349@5357 470 * Transaction only applies to the given subtree.
cl349@5357 471 * You can only have one transaction at any time.
cl349@5357 472 * Returns false on failure.
cl349@5357 473 */
cl349@5357 474 bool xs_transaction_start(struct xs_handle *h, const char *subtree)
cl349@5357 475 {
cl349@5357 476 return xs_bool(xs_single(h, XS_TRANSACTION_START, subtree, NULL));
cl349@5357 477 }
cl349@5357 478
cl349@5357 479 /* End a transaction.
cl349@5357 480 * If abandon is true, transaction is discarded instead of committed.
cl349@5357 481 * Returns false on failure, which indicates an error: transactions will
cl349@5357 482 * not fail spuriously.
cl349@5357 483 */
cl349@5357 484 bool xs_transaction_end(struct xs_handle *h, bool abort)
cl349@5357 485 {
cl349@5357 486 char abortstr[2];
cl349@5357 487
cl349@5357 488 if (abort)
cl349@5357 489 strcpy(abortstr, "F");
cl349@5357 490 else
cl349@5357 491 strcpy(abortstr, "T");
cl349@5357 492 return xs_bool(xs_single(h, XS_TRANSACTION_END, abortstr, NULL));
cl349@5357 493 }
cl349@5357 494
cl349@5357 495 /* Introduce a new domain.
cl349@5357 496 * This tells the store daemon about a shared memory page and event channel
cl349@5357 497 * associated with a domain: the domain uses these to communicate.
cl349@5357 498 */
cl349@5478 499 bool xs_introduce_domain(struct xs_handle *h, domid_t domid, unsigned long mfn,
cl349@5478 500 unsigned int eventchn, const char *path)
cl349@5357 501 {
cl349@5357 502 char domid_str[MAX_STRLEN(domid)];
cl349@5357 503 char mfn_str[MAX_STRLEN(mfn)];
cl349@5357 504 char eventchn_str[MAX_STRLEN(eventchn)];
cl349@5357 505 struct iovec iov[4];
cl349@5357 506
cl349@5357 507 sprintf(domid_str, "%u", domid);
cl349@5357 508 sprintf(mfn_str, "%lu", mfn);
cl349@5357 509 sprintf(eventchn_str, "%u", eventchn);
cl349@5357 510
cl349@5357 511 iov[0].iov_base = domid_str;
cl349@5357 512 iov[0].iov_len = strlen(domid_str) + 1;
cl349@5357 513 iov[1].iov_base = mfn_str;
cl349@5357 514 iov[1].iov_len = strlen(mfn_str) + 1;
cl349@5357 515 iov[2].iov_base = eventchn_str;
cl349@5357 516 iov[2].iov_len = strlen(eventchn_str) + 1;
cl349@5357 517 iov[3].iov_base = (char *)path;
cl349@5357 518 iov[3].iov_len = strlen(path) + 1;
cl349@5357 519
cl349@5357 520 return xs_bool(xs_talkv(h, XS_INTRODUCE, iov, ARRAY_SIZE(iov), NULL));
cl349@5357 521 }
cl349@5357 522
cl349@5478 523 bool xs_release_domain(struct xs_handle *h, domid_t domid)
cl349@5357 524 {
cl349@5357 525 char domid_str[MAX_STRLEN(domid)];
cl349@5357 526
cl349@5357 527 sprintf(domid_str, "%u", domid);
cl349@5357 528
cl349@5357 529 return xs_bool(xs_single(h, XS_RELEASE, domid_str, NULL));
cl349@5357 530 }
cl349@5357 531
cl349@5357 532 bool xs_shutdown(struct xs_handle *h)
cl349@5357 533 {
cl349@5357 534 bool ret = xs_bool(xs_single(h, XS_SHUTDOWN, "", NULL));
cl349@5357 535 if (ret) {
cl349@5357 536 char c;
cl349@5357 537 /* Wait for it to actually shutdown. */
cl349@5357 538 read(h->fd, &c, 1);
cl349@5357 539 }
cl349@5357 540 return ret;
cl349@5357 541 }
cl349@5357 542
cl349@5357 543 /* Only useful for DEBUG versions */
cl349@5357 544 char *xs_debug_command(struct xs_handle *h, const char *cmd,
cl349@5357 545 void *data, unsigned int len)
cl349@5357 546 {
cl349@5357 547 struct iovec iov[2];
cl349@5357 548
cl349@5357 549 iov[0].iov_base = (void *)cmd;
cl349@5357 550 iov[0].iov_len = strlen(cmd) + 1;
cl349@5357 551 iov[1].iov_base = data;
cl349@5357 552 iov[1].iov_len = len;
cl349@5357 553
cl349@5357 554 return xs_talkv(h, XS_DEBUG, iov, ARRAY_SIZE(iov), NULL);
cl349@5357 555 }