Alexander Ivanov | 518b0d8 | 2022-10-17 09:28:20 +0200 | [diff] [blame] | 1 | /* |
| 2 | * QEMU Guest Agent Linux-specific command implementations |
| 3 | * |
| 4 | * Copyright IBM Corp. 2011 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Michael Roth <mdroth@linux.vnet.ibm.com> |
| 8 | * Michal Privoznik <mprivozn@redhat.com> |
| 9 | * |
| 10 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 11 | * See the COPYING file in the top-level directory. |
| 12 | */ |
| 13 | |
| 14 | #include "qemu/osdep.h" |
| 15 | #include "qapi/error.h" |
Daniel P. Berrangé | 4210027 | 2024-07-12 14:24:39 +0100 | [diff] [blame] | 16 | #include "qga-qapi-commands.h" |
Daniel P. Berrangé | 329cefe | 2024-07-12 14:24:41 +0100 | [diff] [blame] | 17 | #include "qapi/error.h" |
| 18 | #include "qapi/qmp/qerror.h" |
Alexander Ivanov | 518b0d8 | 2022-10-17 09:28:20 +0200 | [diff] [blame] | 19 | #include "commands-common.h" |
| 20 | #include "cutils.h" |
| 21 | #include <mntent.h> |
| 22 | #include <sys/ioctl.h> |
Daniel P. Berrangé | 329cefe | 2024-07-12 14:24:41 +0100 | [diff] [blame] | 23 | #include <mntent.h> |
| 24 | #include <linux/nvme_ioctl.h> |
| 25 | #include "block/nvme.h" |
| 26 | |
| 27 | #ifdef CONFIG_LIBUDEV |
| 28 | #include <libudev.h> |
| 29 | #endif |
| 30 | |
Dehan Meng | 8e326d3 | 2024-06-13 17:28:02 +0800 | [diff] [blame] | 31 | #ifdef HAVE_GETIFADDRS |
| 32 | #include <net/if.h> |
| 33 | #endif |
| 34 | |
Daniel P. Berrangé | 329cefe | 2024-07-12 14:24:41 +0100 | [diff] [blame] | 35 | #include <sys/statvfs.h> |
Alexander Ivanov | 518b0d8 | 2022-10-17 09:28:20 +0200 | [diff] [blame] | 36 | |
| 37 | #if defined(CONFIG_FSFREEZE) || defined(CONFIG_FSTRIM) |
| 38 | static int dev_major_minor(const char *devpath, |
| 39 | unsigned int *devmajor, unsigned int *devminor) |
| 40 | { |
| 41 | struct stat st; |
| 42 | |
| 43 | *devmajor = 0; |
| 44 | *devminor = 0; |
| 45 | |
| 46 | if (stat(devpath, &st) < 0) { |
| 47 | slog("failed to stat device file '%s': %s", devpath, strerror(errno)); |
| 48 | return -1; |
| 49 | } |
| 50 | if (S_ISDIR(st.st_mode)) { |
| 51 | /* It is bind mount */ |
| 52 | return -2; |
| 53 | } |
| 54 | if (S_ISBLK(st.st_mode)) { |
| 55 | *devmajor = major(st.st_rdev); |
| 56 | *devminor = minor(st.st_rdev); |
| 57 | return 0; |
| 58 | } |
| 59 | return -1; |
| 60 | } |
| 61 | |
| 62 | static bool build_fs_mount_list_from_mtab(FsMountList *mounts, Error **errp) |
| 63 | { |
| 64 | struct mntent *ment; |
| 65 | FsMount *mount; |
| 66 | char const *mtab = "/proc/self/mounts"; |
| 67 | FILE *fp; |
| 68 | unsigned int devmajor, devminor; |
| 69 | |
| 70 | fp = setmntent(mtab, "r"); |
| 71 | if (!fp) { |
| 72 | error_setg(errp, "failed to open mtab file: '%s'", mtab); |
| 73 | return false; |
| 74 | } |
| 75 | |
| 76 | while ((ment = getmntent(fp))) { |
| 77 | /* |
| 78 | * An entry which device name doesn't start with a '/' is |
| 79 | * either a dummy file system or a network file system. |
| 80 | * Add special handling for smbfs and cifs as is done by |
| 81 | * coreutils as well. |
| 82 | */ |
| 83 | if ((ment->mnt_fsname[0] != '/') || |
| 84 | (strcmp(ment->mnt_type, "smbfs") == 0) || |
| 85 | (strcmp(ment->mnt_type, "cifs") == 0)) { |
| 86 | continue; |
| 87 | } |
| 88 | if (dev_major_minor(ment->mnt_fsname, &devmajor, &devminor) == -2) { |
| 89 | /* Skip bind mounts */ |
| 90 | continue; |
| 91 | } |
| 92 | |
| 93 | mount = g_new0(FsMount, 1); |
| 94 | mount->dirname = g_strdup(ment->mnt_dir); |
| 95 | mount->devtype = g_strdup(ment->mnt_type); |
| 96 | mount->devmajor = devmajor; |
| 97 | mount->devminor = devminor; |
| 98 | |
| 99 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
| 100 | } |
| 101 | |
| 102 | endmntent(fp); |
| 103 | return true; |
| 104 | } |
| 105 | |
| 106 | static void decode_mntname(char *name, int len) |
| 107 | { |
| 108 | int i, j = 0; |
| 109 | for (i = 0; i <= len; i++) { |
| 110 | if (name[i] != '\\') { |
| 111 | name[j++] = name[i]; |
| 112 | } else if (name[i + 1] == '\\') { |
| 113 | name[j++] = '\\'; |
| 114 | i++; |
| 115 | } else if (name[i + 1] >= '0' && name[i + 1] <= '3' && |
| 116 | name[i + 2] >= '0' && name[i + 2] <= '7' && |
| 117 | name[i + 3] >= '0' && name[i + 3] <= '7') { |
| 118 | name[j++] = (name[i + 1] - '0') * 64 + |
| 119 | (name[i + 2] - '0') * 8 + |
| 120 | (name[i + 3] - '0'); |
| 121 | i += 3; |
| 122 | } else { |
| 123 | name[j++] = name[i]; |
| 124 | } |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * Walk the mount table and build a list of local file systems |
| 130 | */ |
| 131 | bool build_fs_mount_list(FsMountList *mounts, Error **errp) |
| 132 | { |
| 133 | FsMount *mount; |
| 134 | char const *mountinfo = "/proc/self/mountinfo"; |
| 135 | FILE *fp; |
| 136 | char *line = NULL, *dash; |
| 137 | size_t n; |
| 138 | char check; |
| 139 | unsigned int devmajor, devminor; |
| 140 | int ret, dir_s, dir_e, type_s, type_e, dev_s, dev_e; |
| 141 | |
| 142 | fp = fopen(mountinfo, "r"); |
| 143 | if (!fp) { |
| 144 | return build_fs_mount_list_from_mtab(mounts, errp); |
| 145 | } |
| 146 | |
| 147 | while (getline(&line, &n, fp) != -1) { |
| 148 | ret = sscanf(line, "%*u %*u %u:%u %*s %n%*s%n%c", |
| 149 | &devmajor, &devminor, &dir_s, &dir_e, &check); |
| 150 | if (ret < 3) { |
| 151 | continue; |
| 152 | } |
| 153 | dash = strstr(line + dir_e, " - "); |
| 154 | if (!dash) { |
| 155 | continue; |
| 156 | } |
| 157 | ret = sscanf(dash, " - %n%*s%n %n%*s%n%c", |
| 158 | &type_s, &type_e, &dev_s, &dev_e, &check); |
| 159 | if (ret < 1) { |
| 160 | continue; |
| 161 | } |
| 162 | line[dir_e] = 0; |
| 163 | dash[type_e] = 0; |
| 164 | dash[dev_e] = 0; |
| 165 | decode_mntname(line + dir_s, dir_e - dir_s); |
| 166 | decode_mntname(dash + dev_s, dev_e - dev_s); |
| 167 | if (devmajor == 0) { |
| 168 | /* btrfs reports major number = 0 */ |
| 169 | if (strcmp("btrfs", dash + type_s) != 0 || |
| 170 | dev_major_minor(dash + dev_s, &devmajor, &devminor) < 0) { |
| 171 | continue; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | mount = g_new0(FsMount, 1); |
| 176 | mount->dirname = g_strdup(line + dir_s); |
| 177 | mount->devtype = g_strdup(dash + type_s); |
| 178 | mount->devmajor = devmajor; |
| 179 | mount->devminor = devminor; |
| 180 | |
| 181 | QTAILQ_INSERT_TAIL(mounts, mount, next); |
| 182 | } |
| 183 | free(line); |
| 184 | |
| 185 | fclose(fp); |
| 186 | return true; |
| 187 | } |
| 188 | #endif /* CONFIG_FSFREEZE || CONFIG_FSTRIM */ |
| 189 | |
| 190 | #ifdef CONFIG_FSFREEZE |
| 191 | /* |
| 192 | * Walk list of mounted file systems in the guest, and freeze the ones which |
| 193 | * are real local file systems. |
| 194 | */ |
| 195 | int64_t qmp_guest_fsfreeze_do_freeze_list(bool has_mountpoints, |
| 196 | strList *mountpoints, |
| 197 | FsMountList mounts, |
| 198 | Error **errp) |
| 199 | { |
| 200 | struct FsMount *mount; |
| 201 | strList *list; |
| 202 | int fd, ret, i = 0; |
| 203 | |
| 204 | QTAILQ_FOREACH_REVERSE(mount, &mounts, next) { |
| 205 | /* To issue fsfreeze in the reverse order of mounts, check if the |
| 206 | * mount is listed in the list here */ |
| 207 | if (has_mountpoints) { |
| 208 | for (list = mountpoints; list; list = list->next) { |
| 209 | if (strcmp(list->value, mount->dirname) == 0) { |
| 210 | break; |
| 211 | } |
| 212 | } |
| 213 | if (!list) { |
| 214 | continue; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); |
| 219 | if (fd == -1) { |
| 220 | error_setg_errno(errp, errno, "failed to open %s", mount->dirname); |
| 221 | return -1; |
| 222 | } |
| 223 | |
| 224 | /* we try to cull filesystems we know won't work in advance, but other |
| 225 | * filesystems may not implement fsfreeze for less obvious reasons. |
| 226 | * these will report EOPNOTSUPP. we simply ignore these when tallying |
| 227 | * the number of frozen filesystems. |
| 228 | * if a filesystem is mounted more than once (aka bind mount) a |
| 229 | * consecutive attempt to freeze an already frozen filesystem will |
| 230 | * return EBUSY. |
| 231 | * |
| 232 | * any other error means a failure to freeze a filesystem we |
| 233 | * expect to be freezable, so return an error in those cases |
| 234 | * and return system to thawed state. |
| 235 | */ |
| 236 | ret = ioctl(fd, FIFREEZE); |
| 237 | if (ret == -1) { |
| 238 | if (errno != EOPNOTSUPP && errno != EBUSY) { |
| 239 | error_setg_errno(errp, errno, "failed to freeze %s", |
| 240 | mount->dirname); |
| 241 | close(fd); |
| 242 | return -1; |
| 243 | } |
| 244 | } else { |
| 245 | i++; |
| 246 | } |
| 247 | close(fd); |
| 248 | } |
| 249 | return i; |
| 250 | } |
| 251 | |
| 252 | int qmp_guest_fsfreeze_do_thaw(Error **errp) |
| 253 | { |
| 254 | int ret; |
| 255 | FsMountList mounts; |
| 256 | FsMount *mount; |
| 257 | int fd, i = 0, logged; |
| 258 | Error *local_err = NULL; |
| 259 | |
| 260 | QTAILQ_INIT(&mounts); |
| 261 | if (!build_fs_mount_list(&mounts, &local_err)) { |
| 262 | error_propagate(errp, local_err); |
| 263 | return -1; |
| 264 | } |
| 265 | |
| 266 | QTAILQ_FOREACH(mount, &mounts, next) { |
| 267 | logged = false; |
| 268 | fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); |
| 269 | if (fd == -1) { |
| 270 | continue; |
| 271 | } |
| 272 | /* we have no way of knowing whether a filesystem was actually unfrozen |
| 273 | * as a result of a successful call to FITHAW, only that if an error |
| 274 | * was returned the filesystem was *not* unfrozen by that particular |
| 275 | * call. |
| 276 | * |
| 277 | * since multiple preceding FIFREEZEs require multiple calls to FITHAW |
| 278 | * to unfreeze, continuing issuing FITHAW until an error is returned, |
| 279 | * in which case either the filesystem is in an unfreezable state, or, |
| 280 | * more likely, it was thawed previously (and remains so afterward). |
| 281 | * |
| 282 | * also, since the most recent successful call is the one that did |
| 283 | * the actual unfreeze, we can use this to provide an accurate count |
| 284 | * of the number of filesystems unfrozen by guest-fsfreeze-thaw, which |
| 285 | * may * be useful for determining whether a filesystem was unfrozen |
| 286 | * during the freeze/thaw phase by a process other than qemu-ga. |
| 287 | */ |
| 288 | do { |
| 289 | ret = ioctl(fd, FITHAW); |
| 290 | if (ret == 0 && !logged) { |
| 291 | i++; |
| 292 | logged = true; |
| 293 | } |
| 294 | } while (ret == 0); |
| 295 | close(fd); |
| 296 | } |
| 297 | |
| 298 | free_fs_mount_list(&mounts); |
| 299 | |
| 300 | return i; |
| 301 | } |
| 302 | #endif /* CONFIG_FSFREEZE */ |
Daniel P. Berrangé | 4210027 | 2024-07-12 14:24:39 +0100 | [diff] [blame] | 303 | |
Daniel P. Berrangé | 329cefe | 2024-07-12 14:24:41 +0100 | [diff] [blame] | 304 | #if defined(CONFIG_FSFREEZE) |
| 305 | |
| 306 | static char *get_pci_driver(char const *syspath, int pathlen, Error **errp) |
| 307 | { |
| 308 | char *path; |
| 309 | char *dpath; |
| 310 | char *driver = NULL; |
| 311 | char buf[PATH_MAX]; |
| 312 | ssize_t len; |
| 313 | |
| 314 | path = g_strndup(syspath, pathlen); |
| 315 | dpath = g_strdup_printf("%s/driver", path); |
| 316 | len = readlink(dpath, buf, sizeof(buf) - 1); |
| 317 | if (len != -1) { |
| 318 | buf[len] = 0; |
| 319 | driver = g_path_get_basename(buf); |
| 320 | } |
| 321 | g_free(dpath); |
| 322 | g_free(path); |
| 323 | return driver; |
| 324 | } |
| 325 | |
| 326 | static int compare_uint(const void *_a, const void *_b) |
| 327 | { |
| 328 | unsigned int a = *(unsigned int *)_a; |
| 329 | unsigned int b = *(unsigned int *)_b; |
| 330 | |
| 331 | return a < b ? -1 : a > b ? 1 : 0; |
| 332 | } |
| 333 | |
| 334 | /* Walk the specified sysfs and build a sorted list of host or ata numbers */ |
| 335 | static int build_hosts(char const *syspath, char const *host, bool ata, |
| 336 | unsigned int *hosts, int hosts_max, Error **errp) |
| 337 | { |
| 338 | char *path; |
| 339 | DIR *dir; |
| 340 | struct dirent *entry; |
| 341 | int i = 0; |
| 342 | |
| 343 | path = g_strndup(syspath, host - syspath); |
| 344 | dir = opendir(path); |
| 345 | if (!dir) { |
| 346 | error_setg_errno(errp, errno, "opendir(\"%s\")", path); |
| 347 | g_free(path); |
| 348 | return -1; |
| 349 | } |
| 350 | |
| 351 | while (i < hosts_max) { |
| 352 | entry = readdir(dir); |
| 353 | if (!entry) { |
| 354 | break; |
| 355 | } |
| 356 | if (ata && sscanf(entry->d_name, "ata%d", hosts + i) == 1) { |
| 357 | ++i; |
| 358 | } else if (!ata && sscanf(entry->d_name, "host%d", hosts + i) == 1) { |
| 359 | ++i; |
| 360 | } |
| 361 | } |
| 362 | |
| 363 | qsort(hosts, i, sizeof(hosts[0]), compare_uint); |
| 364 | |
| 365 | g_free(path); |
| 366 | closedir(dir); |
| 367 | return i; |
| 368 | } |
| 369 | |
| 370 | /* |
| 371 | * Store disk device info for devices on the PCI bus. |
| 372 | * Returns true if information has been stored, or false for failure. |
| 373 | */ |
| 374 | static bool build_guest_fsinfo_for_pci_dev(char const *syspath, |
| 375 | GuestDiskAddress *disk, |
| 376 | Error **errp) |
| 377 | { |
| 378 | unsigned int pci[4], host, hosts[8], tgt[3]; |
| 379 | int i, nhosts = 0, pcilen; |
| 380 | GuestPCIAddress *pciaddr = disk->pci_controller; |
| 381 | bool has_ata = false, has_host = false, has_tgt = false; |
| 382 | char *p, *q, *driver = NULL; |
| 383 | bool ret = false; |
| 384 | |
| 385 | p = strstr(syspath, "/devices/pci"); |
| 386 | if (!p || sscanf(p + 12, "%*x:%*x/%x:%x:%x.%x%n", |
| 387 | pci, pci + 1, pci + 2, pci + 3, &pcilen) < 4) { |
| 388 | g_debug("only pci device is supported: sysfs path '%s'", syspath); |
| 389 | return false; |
| 390 | } |
| 391 | |
| 392 | p += 12 + pcilen; |
| 393 | while (true) { |
| 394 | driver = get_pci_driver(syspath, p - syspath, errp); |
| 395 | if (driver && (g_str_equal(driver, "ata_piix") || |
| 396 | g_str_equal(driver, "sym53c8xx") || |
| 397 | g_str_equal(driver, "virtio-pci") || |
| 398 | g_str_equal(driver, "ahci") || |
| 399 | g_str_equal(driver, "nvme") || |
| 400 | g_str_equal(driver, "xhci_hcd") || |
| 401 | g_str_equal(driver, "ehci-pci"))) { |
| 402 | break; |
| 403 | } |
| 404 | |
| 405 | g_free(driver); |
| 406 | if (sscanf(p, "/%x:%x:%x.%x%n", |
| 407 | pci, pci + 1, pci + 2, pci + 3, &pcilen) == 4) { |
| 408 | p += pcilen; |
| 409 | continue; |
| 410 | } |
| 411 | |
| 412 | g_debug("unsupported driver or sysfs path '%s'", syspath); |
| 413 | return false; |
| 414 | } |
| 415 | |
| 416 | p = strstr(syspath, "/target"); |
| 417 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", |
| 418 | tgt, tgt + 1, tgt + 2) == 3) { |
| 419 | has_tgt = true; |
| 420 | } |
| 421 | |
| 422 | p = strstr(syspath, "/ata"); |
| 423 | if (p) { |
| 424 | q = p + 4; |
| 425 | has_ata = true; |
| 426 | } else { |
| 427 | p = strstr(syspath, "/host"); |
| 428 | q = p + 5; |
| 429 | } |
| 430 | if (p && sscanf(q, "%u", &host) == 1) { |
| 431 | has_host = true; |
| 432 | nhosts = build_hosts(syspath, p, has_ata, hosts, |
| 433 | ARRAY_SIZE(hosts), errp); |
| 434 | if (nhosts < 0) { |
| 435 | goto cleanup; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | pciaddr->domain = pci[0]; |
| 440 | pciaddr->bus = pci[1]; |
| 441 | pciaddr->slot = pci[2]; |
| 442 | pciaddr->function = pci[3]; |
| 443 | |
| 444 | if (strcmp(driver, "ata_piix") == 0) { |
| 445 | /* a host per ide bus, target*:0:<unit>:0 */ |
| 446 | if (!has_host || !has_tgt) { |
| 447 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); |
| 448 | goto cleanup; |
| 449 | } |
| 450 | for (i = 0; i < nhosts; i++) { |
| 451 | if (host == hosts[i]) { |
| 452 | disk->bus_type = GUEST_DISK_BUS_TYPE_IDE; |
| 453 | disk->bus = i; |
| 454 | disk->unit = tgt[1]; |
| 455 | break; |
| 456 | } |
| 457 | } |
| 458 | if (i >= nhosts) { |
| 459 | g_debug("no host for '%s' (driver '%s')", syspath, driver); |
| 460 | goto cleanup; |
| 461 | } |
| 462 | } else if (strcmp(driver, "sym53c8xx") == 0) { |
| 463 | /* scsi(LSI Logic): target*:0:<unit>:0 */ |
| 464 | if (!has_tgt) { |
| 465 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); |
| 466 | goto cleanup; |
| 467 | } |
| 468 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; |
| 469 | disk->unit = tgt[1]; |
| 470 | } else if (strcmp(driver, "virtio-pci") == 0) { |
| 471 | if (has_tgt) { |
| 472 | /* virtio-scsi: target*:0:0:<unit> */ |
| 473 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; |
| 474 | disk->unit = tgt[2]; |
| 475 | } else { |
| 476 | /* virtio-blk: 1 disk per 1 device */ |
| 477 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; |
| 478 | } |
| 479 | } else if (strcmp(driver, "ahci") == 0) { |
| 480 | /* ahci: 1 host per 1 unit */ |
| 481 | if (!has_host || !has_tgt) { |
| 482 | g_debug("invalid sysfs path '%s' (driver '%s')", syspath, driver); |
| 483 | goto cleanup; |
| 484 | } |
| 485 | for (i = 0; i < nhosts; i++) { |
| 486 | if (host == hosts[i]) { |
| 487 | disk->unit = i; |
| 488 | disk->bus_type = GUEST_DISK_BUS_TYPE_SATA; |
| 489 | break; |
| 490 | } |
| 491 | } |
| 492 | if (i >= nhosts) { |
| 493 | g_debug("no host for '%s' (driver '%s')", syspath, driver); |
| 494 | goto cleanup; |
| 495 | } |
| 496 | } else if (strcmp(driver, "nvme") == 0) { |
| 497 | disk->bus_type = GUEST_DISK_BUS_TYPE_NVME; |
| 498 | } else if (strcmp(driver, "ehci-pci") == 0 || strcmp(driver, "xhci_hcd") == 0) { |
| 499 | disk->bus_type = GUEST_DISK_BUS_TYPE_USB; |
| 500 | } else { |
| 501 | g_debug("unknown driver '%s' (sysfs path '%s')", driver, syspath); |
| 502 | goto cleanup; |
| 503 | } |
| 504 | |
| 505 | ret = true; |
| 506 | |
| 507 | cleanup: |
| 508 | g_free(driver); |
| 509 | return ret; |
| 510 | } |
| 511 | |
| 512 | /* |
| 513 | * Store disk device info for non-PCI virtio devices (for example s390x |
| 514 | * channel I/O devices). Returns true if information has been stored, or |
| 515 | * false for failure. |
| 516 | */ |
| 517 | static bool build_guest_fsinfo_for_nonpci_virtio(char const *syspath, |
| 518 | GuestDiskAddress *disk, |
| 519 | Error **errp) |
| 520 | { |
| 521 | unsigned int tgt[3]; |
| 522 | char *p; |
| 523 | |
| 524 | if (!strstr(syspath, "/virtio") || !strstr(syspath, "/block")) { |
| 525 | g_debug("Unsupported virtio device '%s'", syspath); |
| 526 | return false; |
| 527 | } |
| 528 | |
| 529 | p = strstr(syspath, "/target"); |
| 530 | if (p && sscanf(p + 7, "%*u:%*u:%*u/%*u:%u:%u:%u", |
| 531 | &tgt[0], &tgt[1], &tgt[2]) == 3) { |
| 532 | /* virtio-scsi: target*:0:<target>:<unit> */ |
| 533 | disk->bus_type = GUEST_DISK_BUS_TYPE_SCSI; |
| 534 | disk->bus = tgt[0]; |
| 535 | disk->target = tgt[1]; |
| 536 | disk->unit = tgt[2]; |
| 537 | } else { |
| 538 | /* virtio-blk: 1 disk per 1 device */ |
| 539 | disk->bus_type = GUEST_DISK_BUS_TYPE_VIRTIO; |
| 540 | } |
| 541 | |
| 542 | return true; |
| 543 | } |
| 544 | |
| 545 | /* |
| 546 | * Store disk device info for CCW devices (s390x channel I/O devices). |
| 547 | * Returns true if information has been stored, or false for failure. |
| 548 | */ |
| 549 | static bool build_guest_fsinfo_for_ccw_dev(char const *syspath, |
| 550 | GuestDiskAddress *disk, |
| 551 | Error **errp) |
| 552 | { |
| 553 | unsigned int cssid, ssid, subchno, devno; |
| 554 | char *p; |
| 555 | |
| 556 | p = strstr(syspath, "/devices/css"); |
| 557 | if (!p || sscanf(p + 12, "%*x/%x.%x.%x/%*x.%*x.%x/", |
| 558 | &cssid, &ssid, &subchno, &devno) < 4) { |
| 559 | g_debug("could not parse ccw device sysfs path: %s", syspath); |
| 560 | return false; |
| 561 | } |
| 562 | |
| 563 | disk->ccw_address = g_new0(GuestCCWAddress, 1); |
| 564 | disk->ccw_address->cssid = cssid; |
| 565 | disk->ccw_address->ssid = ssid; |
| 566 | disk->ccw_address->subchno = subchno; |
| 567 | disk->ccw_address->devno = devno; |
| 568 | |
| 569 | if (strstr(p, "/virtio")) { |
| 570 | build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); |
| 571 | } |
| 572 | |
| 573 | return true; |
| 574 | } |
| 575 | |
| 576 | /* Store disk device info specified by @sysfs into @fs */ |
| 577 | static void build_guest_fsinfo_for_real_device(char const *syspath, |
| 578 | GuestFilesystemInfo *fs, |
| 579 | Error **errp) |
| 580 | { |
| 581 | GuestDiskAddress *disk; |
| 582 | GuestPCIAddress *pciaddr; |
| 583 | bool has_hwinf; |
| 584 | #ifdef CONFIG_LIBUDEV |
| 585 | struct udev *udev = NULL; |
| 586 | struct udev_device *udevice = NULL; |
| 587 | #endif |
| 588 | |
| 589 | pciaddr = g_new0(GuestPCIAddress, 1); |
| 590 | pciaddr->domain = -1; /* -1 means field is invalid */ |
| 591 | pciaddr->bus = -1; |
| 592 | pciaddr->slot = -1; |
| 593 | pciaddr->function = -1; |
| 594 | |
| 595 | disk = g_new0(GuestDiskAddress, 1); |
| 596 | disk->pci_controller = pciaddr; |
| 597 | disk->bus_type = GUEST_DISK_BUS_TYPE_UNKNOWN; |
| 598 | |
| 599 | #ifdef CONFIG_LIBUDEV |
| 600 | udev = udev_new(); |
| 601 | udevice = udev_device_new_from_syspath(udev, syspath); |
| 602 | if (udev == NULL || udevice == NULL) { |
| 603 | g_debug("failed to query udev"); |
| 604 | } else { |
| 605 | const char *devnode, *serial; |
| 606 | devnode = udev_device_get_devnode(udevice); |
| 607 | if (devnode != NULL) { |
| 608 | disk->dev = g_strdup(devnode); |
| 609 | } |
| 610 | serial = udev_device_get_property_value(udevice, "ID_SERIAL"); |
| 611 | if (serial != NULL && *serial != 0) { |
| 612 | disk->serial = g_strdup(serial); |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | udev_unref(udev); |
| 617 | udev_device_unref(udevice); |
| 618 | #endif |
| 619 | |
| 620 | if (strstr(syspath, "/devices/pci")) { |
| 621 | has_hwinf = build_guest_fsinfo_for_pci_dev(syspath, disk, errp); |
| 622 | } else if (strstr(syspath, "/devices/css")) { |
| 623 | has_hwinf = build_guest_fsinfo_for_ccw_dev(syspath, disk, errp); |
| 624 | } else if (strstr(syspath, "/virtio")) { |
| 625 | has_hwinf = build_guest_fsinfo_for_nonpci_virtio(syspath, disk, errp); |
| 626 | } else { |
| 627 | g_debug("Unsupported device type for '%s'", syspath); |
| 628 | has_hwinf = false; |
| 629 | } |
| 630 | |
| 631 | if (has_hwinf || disk->dev || disk->serial) { |
| 632 | QAPI_LIST_PREPEND(fs->disk, disk); |
| 633 | } else { |
| 634 | qapi_free_GuestDiskAddress(disk); |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | static void build_guest_fsinfo_for_device(char const *devpath, |
| 639 | GuestFilesystemInfo *fs, |
| 640 | Error **errp); |
| 641 | |
| 642 | /* Store a list of slave devices of virtual volume specified by @syspath into |
| 643 | * @fs */ |
| 644 | static void build_guest_fsinfo_for_virtual_device(char const *syspath, |
| 645 | GuestFilesystemInfo *fs, |
| 646 | Error **errp) |
| 647 | { |
| 648 | Error *err = NULL; |
| 649 | DIR *dir; |
| 650 | char *dirpath; |
| 651 | struct dirent *entry; |
| 652 | |
| 653 | dirpath = g_strdup_printf("%s/slaves", syspath); |
| 654 | dir = opendir(dirpath); |
| 655 | if (!dir) { |
| 656 | if (errno != ENOENT) { |
| 657 | error_setg_errno(errp, errno, "opendir(\"%s\")", dirpath); |
| 658 | } |
| 659 | g_free(dirpath); |
| 660 | return; |
| 661 | } |
| 662 | |
| 663 | for (;;) { |
| 664 | errno = 0; |
| 665 | entry = readdir(dir); |
| 666 | if (entry == NULL) { |
| 667 | if (errno) { |
| 668 | error_setg_errno(errp, errno, "readdir(\"%s\")", dirpath); |
| 669 | } |
| 670 | break; |
| 671 | } |
| 672 | |
| 673 | if (entry->d_type == DT_LNK) { |
| 674 | char *path; |
| 675 | |
| 676 | g_debug(" slave device '%s'", entry->d_name); |
| 677 | path = g_strdup_printf("%s/slaves/%s", syspath, entry->d_name); |
| 678 | build_guest_fsinfo_for_device(path, fs, &err); |
| 679 | g_free(path); |
| 680 | |
| 681 | if (err) { |
| 682 | error_propagate(errp, err); |
| 683 | break; |
| 684 | } |
| 685 | } |
| 686 | } |
| 687 | |
| 688 | g_free(dirpath); |
| 689 | closedir(dir); |
| 690 | } |
| 691 | |
| 692 | static bool is_disk_virtual(const char *devpath, Error **errp) |
| 693 | { |
| 694 | g_autofree char *syspath = realpath(devpath, NULL); |
| 695 | |
| 696 | if (!syspath) { |
| 697 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); |
| 698 | return false; |
| 699 | } |
| 700 | return strstr(syspath, "/devices/virtual/block/") != NULL; |
| 701 | } |
| 702 | |
| 703 | /* Dispatch to functions for virtual/real device */ |
| 704 | static void build_guest_fsinfo_for_device(char const *devpath, |
| 705 | GuestFilesystemInfo *fs, |
| 706 | Error **errp) |
| 707 | { |
| 708 | ERRP_GUARD(); |
| 709 | g_autofree char *syspath = NULL; |
| 710 | bool is_virtual = false; |
| 711 | |
| 712 | syspath = realpath(devpath, NULL); |
| 713 | if (!syspath) { |
| 714 | if (errno != ENOENT) { |
| 715 | error_setg_errno(errp, errno, "realpath(\"%s\")", devpath); |
| 716 | return; |
| 717 | } |
| 718 | |
| 719 | /* ENOENT: This devpath may not exist because of container config */ |
| 720 | if (!fs->name) { |
| 721 | fs->name = g_path_get_basename(devpath); |
| 722 | } |
| 723 | return; |
| 724 | } |
| 725 | |
| 726 | if (!fs->name) { |
| 727 | fs->name = g_path_get_basename(syspath); |
| 728 | } |
| 729 | |
| 730 | g_debug(" parse sysfs path '%s'", syspath); |
| 731 | is_virtual = is_disk_virtual(syspath, errp); |
| 732 | if (*errp != NULL) { |
| 733 | return; |
| 734 | } |
| 735 | if (is_virtual) { |
| 736 | build_guest_fsinfo_for_virtual_device(syspath, fs, errp); |
| 737 | } else { |
| 738 | build_guest_fsinfo_for_real_device(syspath, fs, errp); |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | #ifdef CONFIG_LIBUDEV |
| 743 | |
| 744 | /* |
| 745 | * Wrapper around build_guest_fsinfo_for_device() for getting just |
| 746 | * the disk address. |
| 747 | */ |
| 748 | static GuestDiskAddress *get_disk_address(const char *syspath, Error **errp) |
| 749 | { |
| 750 | g_autoptr(GuestFilesystemInfo) fs = NULL; |
| 751 | |
| 752 | fs = g_new0(GuestFilesystemInfo, 1); |
| 753 | build_guest_fsinfo_for_device(syspath, fs, errp); |
| 754 | if (fs->disk != NULL) { |
| 755 | return g_steal_pointer(&fs->disk->value); |
| 756 | } |
| 757 | return NULL; |
| 758 | } |
| 759 | |
| 760 | static char *get_alias_for_syspath(const char *syspath) |
| 761 | { |
| 762 | struct udev *udev = NULL; |
| 763 | struct udev_device *udevice = NULL; |
| 764 | char *ret = NULL; |
| 765 | |
| 766 | udev = udev_new(); |
| 767 | if (udev == NULL) { |
| 768 | g_debug("failed to query udev"); |
| 769 | goto out; |
| 770 | } |
| 771 | udevice = udev_device_new_from_syspath(udev, syspath); |
| 772 | if (udevice == NULL) { |
| 773 | g_debug("failed to query udev for path: %s", syspath); |
| 774 | goto out; |
| 775 | } else { |
| 776 | const char *alias = udev_device_get_property_value( |
| 777 | udevice, "DM_NAME"); |
| 778 | /* |
| 779 | * NULL means there was an error and empty string means there is no |
| 780 | * alias. In case of no alias we return NULL instead of empty string. |
| 781 | */ |
| 782 | if (alias == NULL) { |
| 783 | g_debug("failed to query udev for device alias for: %s", |
| 784 | syspath); |
| 785 | } else if (*alias != 0) { |
| 786 | ret = g_strdup(alias); |
| 787 | } |
| 788 | } |
| 789 | |
| 790 | out: |
| 791 | udev_unref(udev); |
| 792 | udev_device_unref(udevice); |
| 793 | return ret; |
| 794 | } |
| 795 | |
| 796 | static char *get_device_for_syspath(const char *syspath) |
| 797 | { |
| 798 | struct udev *udev = NULL; |
| 799 | struct udev_device *udevice = NULL; |
| 800 | char *ret = NULL; |
| 801 | |
| 802 | udev = udev_new(); |
| 803 | if (udev == NULL) { |
| 804 | g_debug("failed to query udev"); |
| 805 | goto out; |
| 806 | } |
| 807 | udevice = udev_device_new_from_syspath(udev, syspath); |
| 808 | if (udevice == NULL) { |
| 809 | g_debug("failed to query udev for path: %s", syspath); |
| 810 | goto out; |
| 811 | } else { |
| 812 | ret = g_strdup(udev_device_get_devnode(udevice)); |
| 813 | } |
| 814 | |
| 815 | out: |
| 816 | udev_unref(udev); |
| 817 | udev_device_unref(udevice); |
| 818 | return ret; |
| 819 | } |
| 820 | |
| 821 | static void get_disk_deps(const char *disk_dir, GuestDiskInfo *disk) |
| 822 | { |
| 823 | g_autofree char *deps_dir = NULL; |
| 824 | const gchar *dep; |
| 825 | GDir *dp_deps = NULL; |
| 826 | |
| 827 | /* List dependent disks */ |
| 828 | deps_dir = g_strdup_printf("%s/slaves", disk_dir); |
| 829 | g_debug(" listing entries in: %s", deps_dir); |
| 830 | dp_deps = g_dir_open(deps_dir, 0, NULL); |
| 831 | if (dp_deps == NULL) { |
| 832 | g_debug("failed to list entries in %s", deps_dir); |
| 833 | return; |
| 834 | } |
| 835 | disk->has_dependencies = true; |
| 836 | while ((dep = g_dir_read_name(dp_deps)) != NULL) { |
| 837 | g_autofree char *dep_dir = NULL; |
| 838 | char *dev_name; |
| 839 | |
| 840 | /* Add dependent disks */ |
| 841 | dep_dir = g_strdup_printf("%s/%s", deps_dir, dep); |
| 842 | dev_name = get_device_for_syspath(dep_dir); |
| 843 | if (dev_name != NULL) { |
| 844 | g_debug(" adding dependent device: %s", dev_name); |
| 845 | QAPI_LIST_PREPEND(disk->dependencies, dev_name); |
| 846 | } |
| 847 | } |
| 848 | g_dir_close(dp_deps); |
| 849 | } |
| 850 | |
| 851 | /* |
| 852 | * Detect partitions subdirectory, name is "<disk_name><number>" or |
| 853 | * "<disk_name>p<number>" |
| 854 | * |
| 855 | * @disk_name -- last component of /sys path (e.g. sda) |
| 856 | * @disk_dir -- sys path of the disk (e.g. /sys/block/sda) |
| 857 | * @disk_dev -- device node of the disk (e.g. /dev/sda) |
| 858 | */ |
| 859 | static GuestDiskInfoList *get_disk_partitions( |
| 860 | GuestDiskInfoList *list, |
| 861 | const char *disk_name, const char *disk_dir, |
| 862 | const char *disk_dev) |
| 863 | { |
| 864 | GuestDiskInfoList *ret = list; |
| 865 | struct dirent *de_disk; |
| 866 | DIR *dp_disk = NULL; |
| 867 | size_t len = strlen(disk_name); |
| 868 | |
| 869 | dp_disk = opendir(disk_dir); |
| 870 | while ((de_disk = readdir(dp_disk)) != NULL) { |
| 871 | g_autofree char *partition_dir = NULL; |
| 872 | char *dev_name; |
| 873 | GuestDiskInfo *partition; |
| 874 | |
| 875 | if (!(de_disk->d_type & DT_DIR)) { |
| 876 | continue; |
| 877 | } |
| 878 | |
| 879 | if (!(strncmp(disk_name, de_disk->d_name, len) == 0 && |
| 880 | ((*(de_disk->d_name + len) == 'p' && |
| 881 | isdigit(*(de_disk->d_name + len + 1))) || |
| 882 | isdigit(*(de_disk->d_name + len))))) { |
| 883 | continue; |
| 884 | } |
| 885 | |
| 886 | partition_dir = g_strdup_printf("%s/%s", |
| 887 | disk_dir, de_disk->d_name); |
| 888 | dev_name = get_device_for_syspath(partition_dir); |
| 889 | if (dev_name == NULL) { |
| 890 | g_debug("Failed to get device name for syspath: %s", |
| 891 | disk_dir); |
| 892 | continue; |
| 893 | } |
| 894 | partition = g_new0(GuestDiskInfo, 1); |
| 895 | partition->name = dev_name; |
| 896 | partition->partition = true; |
| 897 | partition->has_dependencies = true; |
| 898 | /* Add parent disk as dependent for easier tracking of hierarchy */ |
| 899 | QAPI_LIST_PREPEND(partition->dependencies, g_strdup(disk_dev)); |
| 900 | |
| 901 | QAPI_LIST_PREPEND(ret, partition); |
| 902 | } |
| 903 | closedir(dp_disk); |
| 904 | |
| 905 | return ret; |
| 906 | } |
| 907 | |
| 908 | static void get_nvme_smart(GuestDiskInfo *disk) |
| 909 | { |
| 910 | int fd; |
| 911 | GuestNVMeSmart *smart; |
| 912 | NvmeSmartLog log = {0}; |
| 913 | struct nvme_admin_cmd cmd = { |
| 914 | .opcode = NVME_ADM_CMD_GET_LOG_PAGE, |
| 915 | .nsid = NVME_NSID_BROADCAST, |
| 916 | .addr = (uintptr_t)&log, |
| 917 | .data_len = sizeof(log), |
| 918 | .cdw10 = NVME_LOG_SMART_INFO | (1 << 15) /* RAE bit */ |
| 919 | | (((sizeof(log) >> 2) - 1) << 16) |
| 920 | }; |
| 921 | |
| 922 | fd = qga_open_cloexec(disk->name, O_RDONLY, 0); |
| 923 | if (fd == -1) { |
| 924 | g_debug("Failed to open device: %s: %s", disk->name, g_strerror(errno)); |
| 925 | return; |
| 926 | } |
| 927 | |
| 928 | if (ioctl(fd, NVME_IOCTL_ADMIN_CMD, &cmd)) { |
| 929 | g_debug("Failed to get smart: %s: %s", disk->name, g_strerror(errno)); |
| 930 | close(fd); |
| 931 | return; |
| 932 | } |
| 933 | |
| 934 | disk->smart = g_new0(GuestDiskSmart, 1); |
| 935 | disk->smart->type = GUEST_DISK_BUS_TYPE_NVME; |
| 936 | |
| 937 | smart = &disk->smart->u.nvme; |
| 938 | smart->critical_warning = log.critical_warning; |
| 939 | smart->temperature = lduw_le_p(&log.temperature); /* unaligned field */ |
| 940 | smart->available_spare = log.available_spare; |
| 941 | smart->available_spare_threshold = log.available_spare_threshold; |
| 942 | smart->percentage_used = log.percentage_used; |
| 943 | smart->data_units_read_lo = le64_to_cpu(log.data_units_read[0]); |
| 944 | smart->data_units_read_hi = le64_to_cpu(log.data_units_read[1]); |
| 945 | smart->data_units_written_lo = le64_to_cpu(log.data_units_written[0]); |
| 946 | smart->data_units_written_hi = le64_to_cpu(log.data_units_written[1]); |
| 947 | smart->host_read_commands_lo = le64_to_cpu(log.host_read_commands[0]); |
| 948 | smart->host_read_commands_hi = le64_to_cpu(log.host_read_commands[1]); |
| 949 | smart->host_write_commands_lo = le64_to_cpu(log.host_write_commands[0]); |
| 950 | smart->host_write_commands_hi = le64_to_cpu(log.host_write_commands[1]); |
| 951 | smart->controller_busy_time_lo = le64_to_cpu(log.controller_busy_time[0]); |
| 952 | smart->controller_busy_time_hi = le64_to_cpu(log.controller_busy_time[1]); |
| 953 | smart->power_cycles_lo = le64_to_cpu(log.power_cycles[0]); |
| 954 | smart->power_cycles_hi = le64_to_cpu(log.power_cycles[1]); |
| 955 | smart->power_on_hours_lo = le64_to_cpu(log.power_on_hours[0]); |
| 956 | smart->power_on_hours_hi = le64_to_cpu(log.power_on_hours[1]); |
| 957 | smart->unsafe_shutdowns_lo = le64_to_cpu(log.unsafe_shutdowns[0]); |
| 958 | smart->unsafe_shutdowns_hi = le64_to_cpu(log.unsafe_shutdowns[1]); |
| 959 | smart->media_errors_lo = le64_to_cpu(log.media_errors[0]); |
| 960 | smart->media_errors_hi = le64_to_cpu(log.media_errors[1]); |
| 961 | smart->number_of_error_log_entries_lo = |
| 962 | le64_to_cpu(log.number_of_error_log_entries[0]); |
| 963 | smart->number_of_error_log_entries_hi = |
| 964 | le64_to_cpu(log.number_of_error_log_entries[1]); |
| 965 | |
| 966 | close(fd); |
| 967 | } |
| 968 | |
| 969 | static void get_disk_smart(GuestDiskInfo *disk) |
| 970 | { |
| 971 | if (disk->address |
| 972 | && (disk->address->bus_type == GUEST_DISK_BUS_TYPE_NVME)) { |
| 973 | get_nvme_smart(disk); |
| 974 | } |
| 975 | } |
| 976 | |
| 977 | GuestDiskInfoList *qmp_guest_get_disks(Error **errp) |
| 978 | { |
| 979 | GuestDiskInfoList *ret = NULL; |
| 980 | GuestDiskInfo *disk; |
| 981 | DIR *dp = NULL; |
| 982 | struct dirent *de = NULL; |
| 983 | |
| 984 | g_debug("listing /sys/block directory"); |
| 985 | dp = opendir("/sys/block"); |
| 986 | if (dp == NULL) { |
| 987 | error_setg_errno(errp, errno, "Can't open directory \"/sys/block\""); |
| 988 | return NULL; |
| 989 | } |
| 990 | while ((de = readdir(dp)) != NULL) { |
| 991 | g_autofree char *disk_dir = NULL, *line = NULL, |
| 992 | *size_path = NULL; |
| 993 | char *dev_name; |
| 994 | Error *local_err = NULL; |
| 995 | if (de->d_type != DT_LNK) { |
| 996 | g_debug(" skipping entry: %s", de->d_name); |
| 997 | continue; |
| 998 | } |
| 999 | |
| 1000 | /* Check size and skip zero-sized disks */ |
| 1001 | g_debug(" checking disk size"); |
| 1002 | size_path = g_strdup_printf("/sys/block/%s/size", de->d_name); |
| 1003 | if (!g_file_get_contents(size_path, &line, NULL, NULL)) { |
| 1004 | g_debug(" failed to read disk size"); |
| 1005 | continue; |
| 1006 | } |
| 1007 | if (g_strcmp0(line, "0\n") == 0) { |
| 1008 | g_debug(" skipping zero-sized disk"); |
| 1009 | continue; |
| 1010 | } |
| 1011 | |
| 1012 | g_debug(" adding %s", de->d_name); |
| 1013 | disk_dir = g_strdup_printf("/sys/block/%s", de->d_name); |
| 1014 | dev_name = get_device_for_syspath(disk_dir); |
| 1015 | if (dev_name == NULL) { |
| 1016 | g_debug("Failed to get device name for syspath: %s", |
| 1017 | disk_dir); |
| 1018 | continue; |
| 1019 | } |
| 1020 | disk = g_new0(GuestDiskInfo, 1); |
| 1021 | disk->name = dev_name; |
| 1022 | disk->partition = false; |
| 1023 | disk->alias = get_alias_for_syspath(disk_dir); |
| 1024 | QAPI_LIST_PREPEND(ret, disk); |
| 1025 | |
| 1026 | /* Get address for non-virtual devices */ |
| 1027 | bool is_virtual = is_disk_virtual(disk_dir, &local_err); |
| 1028 | if (local_err != NULL) { |
| 1029 | g_debug(" failed to check disk path, ignoring error: %s", |
| 1030 | error_get_pretty(local_err)); |
| 1031 | error_free(local_err); |
| 1032 | local_err = NULL; |
| 1033 | /* Don't try to get the address */ |
| 1034 | is_virtual = true; |
| 1035 | } |
| 1036 | if (!is_virtual) { |
| 1037 | disk->address = get_disk_address(disk_dir, &local_err); |
| 1038 | if (local_err != NULL) { |
| 1039 | g_debug(" failed to get device info, ignoring error: %s", |
| 1040 | error_get_pretty(local_err)); |
| 1041 | error_free(local_err); |
| 1042 | local_err = NULL; |
| 1043 | } |
| 1044 | } |
| 1045 | |
| 1046 | get_disk_deps(disk_dir, disk); |
| 1047 | get_disk_smart(disk); |
| 1048 | ret = get_disk_partitions(ret, de->d_name, disk_dir, dev_name); |
| 1049 | } |
| 1050 | |
| 1051 | closedir(dp); |
| 1052 | |
| 1053 | return ret; |
| 1054 | } |
| 1055 | |
Daniel P. Berrangé | 329cefe | 2024-07-12 14:24:41 +0100 | [diff] [blame] | 1056 | #endif |
| 1057 | |
| 1058 | /* Return a list of the disk device(s)' info which @mount lies on */ |
| 1059 | static GuestFilesystemInfo *build_guest_fsinfo(struct FsMount *mount, |
| 1060 | Error **errp) |
| 1061 | { |
| 1062 | GuestFilesystemInfo *fs = g_malloc0(sizeof(*fs)); |
| 1063 | struct statvfs buf; |
| 1064 | unsigned long used, nonroot_total, fr_size; |
| 1065 | char *devpath = g_strdup_printf("/sys/dev/block/%u:%u", |
| 1066 | mount->devmajor, mount->devminor); |
| 1067 | |
| 1068 | fs->mountpoint = g_strdup(mount->dirname); |
| 1069 | fs->type = g_strdup(mount->devtype); |
| 1070 | build_guest_fsinfo_for_device(devpath, fs, errp); |
| 1071 | |
| 1072 | if (statvfs(fs->mountpoint, &buf) == 0) { |
| 1073 | fr_size = buf.f_frsize; |
| 1074 | used = buf.f_blocks - buf.f_bfree; |
| 1075 | nonroot_total = used + buf.f_bavail; |
| 1076 | fs->used_bytes = used * fr_size; |
| 1077 | fs->total_bytes = nonroot_total * fr_size; |
| 1078 | fs->total_bytes_privileged = buf.f_blocks * fr_size; |
| 1079 | |
| 1080 | fs->has_total_bytes = true; |
| 1081 | fs->has_total_bytes_privileged = true; |
| 1082 | fs->has_used_bytes = true; |
| 1083 | } |
| 1084 | |
| 1085 | g_free(devpath); |
| 1086 | |
| 1087 | return fs; |
| 1088 | } |
| 1089 | |
| 1090 | GuestFilesystemInfoList *qmp_guest_get_fsinfo(Error **errp) |
| 1091 | { |
| 1092 | FsMountList mounts; |
| 1093 | struct FsMount *mount; |
| 1094 | GuestFilesystemInfoList *ret = NULL; |
| 1095 | Error *local_err = NULL; |
| 1096 | |
| 1097 | QTAILQ_INIT(&mounts); |
| 1098 | if (!build_fs_mount_list(&mounts, &local_err)) { |
| 1099 | error_propagate(errp, local_err); |
| 1100 | return NULL; |
| 1101 | } |
| 1102 | |
| 1103 | QTAILQ_FOREACH(mount, &mounts, next) { |
| 1104 | g_debug("Building guest fsinfo for '%s'", mount->dirname); |
| 1105 | |
| 1106 | QAPI_LIST_PREPEND(ret, build_guest_fsinfo(mount, &local_err)); |
| 1107 | if (local_err) { |
| 1108 | error_propagate(errp, local_err); |
| 1109 | qapi_free_GuestFilesystemInfoList(ret); |
| 1110 | ret = NULL; |
| 1111 | break; |
| 1112 | } |
| 1113 | } |
| 1114 | |
| 1115 | free_fs_mount_list(&mounts); |
| 1116 | return ret; |
| 1117 | } |
| 1118 | #endif /* CONFIG_FSFREEZE */ |
| 1119 | |
| 1120 | #if defined(CONFIG_FSTRIM) |
| 1121 | /* |
| 1122 | * Walk list of mounted file systems in the guest, and trim them. |
| 1123 | */ |
| 1124 | GuestFilesystemTrimResponse * |
| 1125 | qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp) |
| 1126 | { |
| 1127 | GuestFilesystemTrimResponse *response; |
| 1128 | GuestFilesystemTrimResult *result; |
| 1129 | int ret = 0; |
| 1130 | FsMountList mounts; |
| 1131 | struct FsMount *mount; |
| 1132 | int fd; |
| 1133 | struct fstrim_range r; |
| 1134 | |
| 1135 | slog("guest-fstrim called"); |
| 1136 | |
| 1137 | QTAILQ_INIT(&mounts); |
| 1138 | if (!build_fs_mount_list(&mounts, errp)) { |
| 1139 | return NULL; |
| 1140 | } |
| 1141 | |
| 1142 | response = g_malloc0(sizeof(*response)); |
| 1143 | |
| 1144 | QTAILQ_FOREACH(mount, &mounts, next) { |
| 1145 | result = g_malloc0(sizeof(*result)); |
| 1146 | result->path = g_strdup(mount->dirname); |
| 1147 | |
| 1148 | QAPI_LIST_PREPEND(response->paths, result); |
| 1149 | |
| 1150 | fd = qga_open_cloexec(mount->dirname, O_RDONLY, 0); |
| 1151 | if (fd == -1) { |
| 1152 | result->error = g_strdup_printf("failed to open: %s", |
| 1153 | strerror(errno)); |
| 1154 | continue; |
| 1155 | } |
| 1156 | |
| 1157 | /* We try to cull filesystems we know won't work in advance, but other |
| 1158 | * filesystems may not implement fstrim for less obvious reasons. |
| 1159 | * These will report EOPNOTSUPP; while in some other cases ENOTTY |
| 1160 | * will be reported (e.g. CD-ROMs). |
| 1161 | * Any other error means an unexpected error. |
| 1162 | */ |
| 1163 | r.start = 0; |
| 1164 | r.len = -1; |
| 1165 | r.minlen = has_minimum ? minimum : 0; |
| 1166 | ret = ioctl(fd, FITRIM, &r); |
| 1167 | if (ret == -1) { |
| 1168 | if (errno == ENOTTY || errno == EOPNOTSUPP) { |
| 1169 | result->error = g_strdup("trim not supported"); |
| 1170 | } else { |
| 1171 | result->error = g_strdup_printf("failed to trim: %s", |
| 1172 | strerror(errno)); |
| 1173 | } |
| 1174 | close(fd); |
| 1175 | continue; |
| 1176 | } |
| 1177 | |
| 1178 | result->has_minimum = true; |
| 1179 | result->minimum = r.minlen; |
| 1180 | result->has_trimmed = true; |
| 1181 | result->trimmed = r.len; |
| 1182 | close(fd); |
| 1183 | } |
| 1184 | |
| 1185 | free_fs_mount_list(&mounts); |
| 1186 | return response; |
| 1187 | } |
| 1188 | #endif /* CONFIG_FSTRIM */ |
Daniel P. Berrangé | 0c6f882 | 2024-07-12 14:24:40 +0100 | [diff] [blame] | 1189 | |
| 1190 | #define LINUX_SYS_STATE_FILE "/sys/power/state" |
| 1191 | #define SUSPEND_SUPPORTED 0 |
| 1192 | #define SUSPEND_NOT_SUPPORTED 1 |
| 1193 | |
| 1194 | typedef enum { |
| 1195 | SUSPEND_MODE_DISK = 0, |
| 1196 | SUSPEND_MODE_RAM = 1, |
| 1197 | SUSPEND_MODE_HYBRID = 2, |
| 1198 | } SuspendMode; |
| 1199 | |
| 1200 | /* |
| 1201 | * Executes a command in a child process using g_spawn_sync, |
| 1202 | * returning an int >= 0 representing the exit status of the |
| 1203 | * process. |
| 1204 | * |
| 1205 | * If the program wasn't found in path, returns -1. |
| 1206 | * |
| 1207 | * If a problem happened when creating the child process, |
| 1208 | * returns -1 and errp is set. |
| 1209 | */ |
| 1210 | static int run_process_child(const char *command[], Error **errp) |
| 1211 | { |
| 1212 | int exit_status, spawn_flag; |
| 1213 | GError *g_err = NULL; |
| 1214 | bool success; |
| 1215 | |
| 1216 | spawn_flag = G_SPAWN_SEARCH_PATH | G_SPAWN_STDOUT_TO_DEV_NULL | |
| 1217 | G_SPAWN_STDERR_TO_DEV_NULL; |
| 1218 | |
| 1219 | success = g_spawn_sync(NULL, (char **)command, NULL, spawn_flag, |
| 1220 | NULL, NULL, NULL, NULL, |
| 1221 | &exit_status, &g_err); |
| 1222 | |
| 1223 | if (success) { |
| 1224 | return WEXITSTATUS(exit_status); |
| 1225 | } |
| 1226 | |
| 1227 | if (g_err && (g_err->code != G_SPAWN_ERROR_NOENT)) { |
| 1228 | error_setg(errp, "failed to create child process, error '%s'", |
| 1229 | g_err->message); |
| 1230 | } |
| 1231 | |
| 1232 | g_error_free(g_err); |
| 1233 | return -1; |
| 1234 | } |
| 1235 | |
| 1236 | static bool systemd_supports_mode(SuspendMode mode, Error **errp) |
| 1237 | { |
| 1238 | const char *systemctl_args[3] = {"systemd-hibernate", "systemd-suspend", |
| 1239 | "systemd-hybrid-sleep"}; |
| 1240 | const char *cmd[4] = {"systemctl", "status", systemctl_args[mode], NULL}; |
| 1241 | int status; |
| 1242 | |
| 1243 | status = run_process_child(cmd, errp); |
| 1244 | |
| 1245 | /* |
| 1246 | * systemctl status uses LSB return codes so we can expect |
| 1247 | * status > 0 and be ok. To assert if the guest has support |
| 1248 | * for the selected suspend mode, status should be < 4. 4 is |
| 1249 | * the code for unknown service status, the return value when |
| 1250 | * the service does not exist. A common value is status = 3 |
| 1251 | * (program is not running). |
| 1252 | */ |
| 1253 | if (status > 0 && status < 4) { |
| 1254 | return true; |
| 1255 | } |
| 1256 | |
| 1257 | return false; |
| 1258 | } |
| 1259 | |
| 1260 | static void systemd_suspend(SuspendMode mode, Error **errp) |
| 1261 | { |
| 1262 | Error *local_err = NULL; |
| 1263 | const char *systemctl_args[3] = {"hibernate", "suspend", "hybrid-sleep"}; |
| 1264 | const char *cmd[3] = {"systemctl", systemctl_args[mode], NULL}; |
| 1265 | int status; |
| 1266 | |
| 1267 | status = run_process_child(cmd, &local_err); |
| 1268 | |
| 1269 | if (status == 0) { |
| 1270 | return; |
| 1271 | } |
| 1272 | |
| 1273 | if ((status == -1) && !local_err) { |
| 1274 | error_setg(errp, "the helper program 'systemctl %s' was not found", |
| 1275 | systemctl_args[mode]); |
| 1276 | return; |
| 1277 | } |
| 1278 | |
| 1279 | if (local_err) { |
| 1280 | error_propagate(errp, local_err); |
| 1281 | } else { |
| 1282 | error_setg(errp, "the helper program 'systemctl %s' returned an " |
| 1283 | "unexpected exit status code (%d)", |
| 1284 | systemctl_args[mode], status); |
| 1285 | } |
| 1286 | } |
| 1287 | |
| 1288 | static bool pmutils_supports_mode(SuspendMode mode, Error **errp) |
| 1289 | { |
| 1290 | Error *local_err = NULL; |
| 1291 | const char *pmutils_args[3] = {"--hibernate", "--suspend", |
| 1292 | "--suspend-hybrid"}; |
| 1293 | const char *cmd[3] = {"pm-is-supported", pmutils_args[mode], NULL}; |
| 1294 | int status; |
| 1295 | |
| 1296 | status = run_process_child(cmd, &local_err); |
| 1297 | |
| 1298 | if (status == SUSPEND_SUPPORTED) { |
| 1299 | return true; |
| 1300 | } |
| 1301 | |
| 1302 | if ((status == -1) && !local_err) { |
| 1303 | return false; |
| 1304 | } |
| 1305 | |
| 1306 | if (local_err) { |
| 1307 | error_propagate(errp, local_err); |
| 1308 | } else { |
| 1309 | error_setg(errp, |
| 1310 | "the helper program '%s' returned an unexpected exit" |
| 1311 | " status code (%d)", "pm-is-supported", status); |
| 1312 | } |
| 1313 | |
| 1314 | return false; |
| 1315 | } |
| 1316 | |
| 1317 | static void pmutils_suspend(SuspendMode mode, Error **errp) |
| 1318 | { |
| 1319 | Error *local_err = NULL; |
| 1320 | const char *pmutils_binaries[3] = {"pm-hibernate", "pm-suspend", |
| 1321 | "pm-suspend-hybrid"}; |
| 1322 | const char *cmd[2] = {pmutils_binaries[mode], NULL}; |
| 1323 | int status; |
| 1324 | |
| 1325 | status = run_process_child(cmd, &local_err); |
| 1326 | |
| 1327 | if (status == 0) { |
| 1328 | return; |
| 1329 | } |
| 1330 | |
| 1331 | if ((status == -1) && !local_err) { |
| 1332 | error_setg(errp, "the helper program '%s' was not found", |
| 1333 | pmutils_binaries[mode]); |
| 1334 | return; |
| 1335 | } |
| 1336 | |
| 1337 | if (local_err) { |
| 1338 | error_propagate(errp, local_err); |
| 1339 | } else { |
| 1340 | error_setg(errp, |
| 1341 | "the helper program '%s' returned an unexpected exit" |
| 1342 | " status code (%d)", pmutils_binaries[mode], status); |
| 1343 | } |
| 1344 | } |
| 1345 | |
| 1346 | static bool linux_sys_state_supports_mode(SuspendMode mode, Error **errp) |
| 1347 | { |
| 1348 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; |
| 1349 | const char *sysfile_str = sysfile_strs[mode]; |
| 1350 | char buf[32]; /* hopefully big enough */ |
| 1351 | int fd; |
| 1352 | ssize_t ret; |
| 1353 | |
| 1354 | if (!sysfile_str) { |
| 1355 | error_setg(errp, "unknown guest suspend mode"); |
| 1356 | return false; |
| 1357 | } |
| 1358 | |
| 1359 | fd = open(LINUX_SYS_STATE_FILE, O_RDONLY); |
| 1360 | if (fd < 0) { |
| 1361 | return false; |
| 1362 | } |
| 1363 | |
| 1364 | ret = read(fd, buf, sizeof(buf) - 1); |
| 1365 | close(fd); |
| 1366 | if (ret <= 0) { |
| 1367 | return false; |
| 1368 | } |
| 1369 | buf[ret] = '\0'; |
| 1370 | |
| 1371 | if (strstr(buf, sysfile_str)) { |
| 1372 | return true; |
| 1373 | } |
| 1374 | return false; |
| 1375 | } |
| 1376 | |
| 1377 | static void linux_sys_state_suspend(SuspendMode mode, Error **errp) |
| 1378 | { |
| 1379 | g_autoptr(GError) local_gerr = NULL; |
| 1380 | const char *sysfile_strs[3] = {"disk", "mem", NULL}; |
| 1381 | const char *sysfile_str = sysfile_strs[mode]; |
| 1382 | |
| 1383 | if (!sysfile_str) { |
| 1384 | error_setg(errp, "unknown guest suspend mode"); |
| 1385 | return; |
| 1386 | } |
| 1387 | |
| 1388 | if (!g_file_set_contents(LINUX_SYS_STATE_FILE, sysfile_str, |
| 1389 | -1, &local_gerr)) { |
| 1390 | error_setg(errp, "suspend: cannot write to '%s': %s", |
| 1391 | LINUX_SYS_STATE_FILE, local_gerr->message); |
| 1392 | return; |
| 1393 | } |
| 1394 | } |
| 1395 | |
| 1396 | static void guest_suspend(SuspendMode mode, Error **errp) |
| 1397 | { |
| 1398 | Error *local_err = NULL; |
| 1399 | bool mode_supported = false; |
| 1400 | |
| 1401 | if (systemd_supports_mode(mode, &local_err)) { |
| 1402 | mode_supported = true; |
| 1403 | systemd_suspend(mode, &local_err); |
| 1404 | |
| 1405 | if (!local_err) { |
| 1406 | return; |
| 1407 | } |
| 1408 | } |
| 1409 | |
| 1410 | error_free(local_err); |
| 1411 | local_err = NULL; |
| 1412 | |
| 1413 | if (pmutils_supports_mode(mode, &local_err)) { |
| 1414 | mode_supported = true; |
| 1415 | pmutils_suspend(mode, &local_err); |
| 1416 | |
| 1417 | if (!local_err) { |
| 1418 | return; |
| 1419 | } |
| 1420 | } |
| 1421 | |
| 1422 | error_free(local_err); |
| 1423 | local_err = NULL; |
| 1424 | |
| 1425 | if (linux_sys_state_supports_mode(mode, &local_err)) { |
| 1426 | mode_supported = true; |
| 1427 | linux_sys_state_suspend(mode, &local_err); |
| 1428 | } |
| 1429 | |
| 1430 | if (!mode_supported) { |
| 1431 | error_free(local_err); |
| 1432 | error_setg(errp, |
| 1433 | "the requested suspend mode is not supported by the guest"); |
| 1434 | } else { |
| 1435 | error_propagate(errp, local_err); |
| 1436 | } |
| 1437 | } |
| 1438 | |
| 1439 | void qmp_guest_suspend_disk(Error **errp) |
| 1440 | { |
| 1441 | guest_suspend(SUSPEND_MODE_DISK, errp); |
| 1442 | } |
| 1443 | |
| 1444 | void qmp_guest_suspend_ram(Error **errp) |
| 1445 | { |
| 1446 | guest_suspend(SUSPEND_MODE_RAM, errp); |
| 1447 | } |
| 1448 | |
| 1449 | void qmp_guest_suspend_hybrid(Error **errp) |
| 1450 | { |
| 1451 | guest_suspend(SUSPEND_MODE_HYBRID, errp); |
| 1452 | } |
| 1453 | |
Daniel P. Berrangé | 4210027 | 2024-07-12 14:24:39 +0100 | [diff] [blame] | 1454 | /* Transfer online/offline status between @vcpu and the guest system. |
| 1455 | * |
| 1456 | * On input either @errp or *@errp must be NULL. |
| 1457 | * |
| 1458 | * In system-to-@vcpu direction, the following @vcpu fields are accessed: |
| 1459 | * - R: vcpu->logical_id |
| 1460 | * - W: vcpu->online |
| 1461 | * - W: vcpu->can_offline |
| 1462 | * |
| 1463 | * In @vcpu-to-system direction, the following @vcpu fields are accessed: |
| 1464 | * - R: vcpu->logical_id |
| 1465 | * - R: vcpu->online |
| 1466 | * |
| 1467 | * Written members remain unmodified on error. |
| 1468 | */ |
| 1469 | static void transfer_vcpu(GuestLogicalProcessor *vcpu, bool sys2vcpu, |
| 1470 | char *dirpath, Error **errp) |
| 1471 | { |
| 1472 | int fd; |
| 1473 | int res; |
| 1474 | int dirfd; |
| 1475 | static const char fn[] = "online"; |
| 1476 | |
| 1477 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); |
| 1478 | if (dirfd == -1) { |
| 1479 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); |
| 1480 | return; |
| 1481 | } |
| 1482 | |
| 1483 | fd = openat(dirfd, fn, sys2vcpu ? O_RDONLY : O_RDWR); |
| 1484 | if (fd == -1) { |
| 1485 | if (errno != ENOENT) { |
| 1486 | error_setg_errno(errp, errno, "open(\"%s/%s\")", dirpath, fn); |
| 1487 | } else if (sys2vcpu) { |
| 1488 | vcpu->online = true; |
| 1489 | vcpu->can_offline = false; |
| 1490 | } else if (!vcpu->online) { |
| 1491 | error_setg(errp, "logical processor #%" PRId64 " can't be " |
| 1492 | "offlined", vcpu->logical_id); |
| 1493 | } /* otherwise pretend successful re-onlining */ |
| 1494 | } else { |
| 1495 | unsigned char status; |
| 1496 | |
| 1497 | res = pread(fd, &status, 1, 0); |
| 1498 | if (res == -1) { |
| 1499 | error_setg_errno(errp, errno, "pread(\"%s/%s\")", dirpath, fn); |
| 1500 | } else if (res == 0) { |
| 1501 | error_setg(errp, "pread(\"%s/%s\"): unexpected EOF", dirpath, |
| 1502 | fn); |
| 1503 | } else if (sys2vcpu) { |
| 1504 | vcpu->online = (status != '0'); |
| 1505 | vcpu->can_offline = true; |
| 1506 | } else if (vcpu->online != (status != '0')) { |
| 1507 | status = '0' + vcpu->online; |
| 1508 | if (pwrite(fd, &status, 1, 0) == -1) { |
| 1509 | error_setg_errno(errp, errno, "pwrite(\"%s/%s\")", dirpath, |
| 1510 | fn); |
| 1511 | } |
| 1512 | } /* otherwise pretend successful re-(on|off)-lining */ |
| 1513 | |
| 1514 | res = close(fd); |
| 1515 | g_assert(res == 0); |
| 1516 | } |
| 1517 | |
| 1518 | res = close(dirfd); |
| 1519 | g_assert(res == 0); |
| 1520 | } |
| 1521 | |
| 1522 | GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp) |
| 1523 | { |
| 1524 | GuestLogicalProcessorList *head, **tail; |
| 1525 | const char *cpu_dir = "/sys/devices/system/cpu"; |
| 1526 | const gchar *line; |
| 1527 | g_autoptr(GDir) cpu_gdir = NULL; |
| 1528 | Error *local_err = NULL; |
| 1529 | |
| 1530 | head = NULL; |
| 1531 | tail = &head; |
| 1532 | cpu_gdir = g_dir_open(cpu_dir, 0, NULL); |
| 1533 | |
| 1534 | if (cpu_gdir == NULL) { |
| 1535 | error_setg_errno(errp, errno, "failed to list entries: %s", cpu_dir); |
| 1536 | return NULL; |
| 1537 | } |
| 1538 | |
| 1539 | while (local_err == NULL && (line = g_dir_read_name(cpu_gdir)) != NULL) { |
| 1540 | GuestLogicalProcessor *vcpu; |
| 1541 | int64_t id; |
| 1542 | if (sscanf(line, "cpu%" PRId64, &id)) { |
| 1543 | g_autofree char *path = g_strdup_printf("/sys/devices/system/cpu/" |
| 1544 | "cpu%" PRId64 "/", id); |
| 1545 | vcpu = g_malloc0(sizeof *vcpu); |
| 1546 | vcpu->logical_id = id; |
| 1547 | vcpu->has_can_offline = true; /* lolspeak ftw */ |
| 1548 | transfer_vcpu(vcpu, true, path, &local_err); |
| 1549 | QAPI_LIST_APPEND(tail, vcpu); |
| 1550 | } |
| 1551 | } |
| 1552 | |
| 1553 | if (local_err == NULL) { |
| 1554 | /* there's no guest with zero VCPUs */ |
| 1555 | g_assert(head != NULL); |
| 1556 | return head; |
| 1557 | } |
| 1558 | |
| 1559 | qapi_free_GuestLogicalProcessorList(head); |
| 1560 | error_propagate(errp, local_err); |
| 1561 | return NULL; |
| 1562 | } |
| 1563 | |
| 1564 | int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp) |
| 1565 | { |
| 1566 | int64_t processed; |
| 1567 | Error *local_err = NULL; |
| 1568 | |
| 1569 | processed = 0; |
| 1570 | while (vcpus != NULL) { |
| 1571 | char *path = g_strdup_printf("/sys/devices/system/cpu/cpu%" PRId64 "/", |
| 1572 | vcpus->value->logical_id); |
| 1573 | |
| 1574 | transfer_vcpu(vcpus->value, false, path, &local_err); |
| 1575 | g_free(path); |
| 1576 | if (local_err != NULL) { |
| 1577 | break; |
| 1578 | } |
| 1579 | ++processed; |
| 1580 | vcpus = vcpus->next; |
| 1581 | } |
| 1582 | |
| 1583 | if (local_err != NULL) { |
| 1584 | if (processed == 0) { |
| 1585 | error_propagate(errp, local_err); |
| 1586 | } else { |
| 1587 | error_free(local_err); |
| 1588 | } |
| 1589 | } |
| 1590 | |
| 1591 | return processed; |
| 1592 | } |
Daniel P. Berrangé | 74cbd9b | 2024-07-12 14:24:42 +0100 | [diff] [blame] | 1593 | |
Daniel P. Berrangé | 8b93e56 | 2024-07-12 14:24:43 +0100 | [diff] [blame] | 1594 | |
| 1595 | static void ga_read_sysfs_file(int dirfd, const char *pathname, char *buf, |
| 1596 | int size, Error **errp) |
| 1597 | { |
| 1598 | int fd; |
| 1599 | int res; |
| 1600 | |
| 1601 | errno = 0; |
| 1602 | fd = openat(dirfd, pathname, O_RDONLY); |
| 1603 | if (fd == -1) { |
| 1604 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); |
| 1605 | return; |
| 1606 | } |
| 1607 | |
| 1608 | res = pread(fd, buf, size, 0); |
| 1609 | if (res == -1) { |
| 1610 | error_setg_errno(errp, errno, "pread sysfs file \"%s\"", pathname); |
| 1611 | } else if (res == 0) { |
| 1612 | error_setg(errp, "pread sysfs file \"%s\": unexpected EOF", pathname); |
| 1613 | } |
| 1614 | close(fd); |
| 1615 | } |
| 1616 | |
| 1617 | static void ga_write_sysfs_file(int dirfd, const char *pathname, |
| 1618 | const char *buf, int size, Error **errp) |
| 1619 | { |
| 1620 | int fd; |
| 1621 | |
| 1622 | errno = 0; |
| 1623 | fd = openat(dirfd, pathname, O_WRONLY); |
| 1624 | if (fd == -1) { |
| 1625 | error_setg_errno(errp, errno, "open sysfs file \"%s\"", pathname); |
| 1626 | return; |
| 1627 | } |
| 1628 | |
| 1629 | if (pwrite(fd, buf, size, 0) == -1) { |
| 1630 | error_setg_errno(errp, errno, "pwrite sysfs file \"%s\"", pathname); |
| 1631 | } |
| 1632 | |
| 1633 | close(fd); |
| 1634 | } |
| 1635 | |
| 1636 | /* Transfer online/offline status between @mem_blk and the guest system. |
| 1637 | * |
| 1638 | * On input either @errp or *@errp must be NULL. |
| 1639 | * |
| 1640 | * In system-to-@mem_blk direction, the following @mem_blk fields are accessed: |
| 1641 | * - R: mem_blk->phys_index |
| 1642 | * - W: mem_blk->online |
| 1643 | * - W: mem_blk->can_offline |
| 1644 | * |
| 1645 | * In @mem_blk-to-system direction, the following @mem_blk fields are accessed: |
| 1646 | * - R: mem_blk->phys_index |
| 1647 | * - R: mem_blk->online |
| 1648 | *- R: mem_blk->can_offline |
| 1649 | * Written members remain unmodified on error. |
| 1650 | */ |
| 1651 | static void transfer_memory_block(GuestMemoryBlock *mem_blk, bool sys2memblk, |
| 1652 | GuestMemoryBlockResponse *result, |
| 1653 | Error **errp) |
| 1654 | { |
| 1655 | char *dirpath; |
| 1656 | int dirfd; |
| 1657 | char *status; |
| 1658 | Error *local_err = NULL; |
| 1659 | |
| 1660 | if (!sys2memblk) { |
| 1661 | DIR *dp; |
| 1662 | |
| 1663 | if (!result) { |
| 1664 | error_setg(errp, "Internal error, 'result' should not be NULL"); |
| 1665 | return; |
| 1666 | } |
| 1667 | errno = 0; |
| 1668 | dp = opendir("/sys/devices/system/memory/"); |
| 1669 | /* if there is no 'memory' directory in sysfs, |
| 1670 | * we think this VM does not support online/offline memory block, |
| 1671 | * any other solution? |
| 1672 | */ |
| 1673 | if (!dp) { |
| 1674 | if (errno == ENOENT) { |
| 1675 | result->response = |
| 1676 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; |
| 1677 | } |
| 1678 | goto out1; |
| 1679 | } |
| 1680 | closedir(dp); |
| 1681 | } |
| 1682 | |
| 1683 | dirpath = g_strdup_printf("/sys/devices/system/memory/memory%" PRId64 "/", |
| 1684 | mem_blk->phys_index); |
| 1685 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); |
| 1686 | if (dirfd == -1) { |
| 1687 | if (sys2memblk) { |
| 1688 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); |
| 1689 | } else { |
| 1690 | if (errno == ENOENT) { |
| 1691 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_NOT_FOUND; |
| 1692 | } else { |
| 1693 | result->response = |
| 1694 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; |
| 1695 | } |
| 1696 | } |
| 1697 | g_free(dirpath); |
| 1698 | goto out1; |
| 1699 | } |
| 1700 | g_free(dirpath); |
| 1701 | |
| 1702 | status = g_malloc0(10); |
| 1703 | ga_read_sysfs_file(dirfd, "state", status, 10, &local_err); |
| 1704 | if (local_err) { |
| 1705 | /* treat with sysfs file that not exist in old kernel */ |
| 1706 | if (errno == ENOENT) { |
| 1707 | error_free(local_err); |
| 1708 | if (sys2memblk) { |
| 1709 | mem_blk->online = true; |
| 1710 | mem_blk->can_offline = false; |
| 1711 | } else if (!mem_blk->online) { |
| 1712 | result->response = |
| 1713 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_NOT_SUPPORTED; |
| 1714 | } |
| 1715 | } else { |
| 1716 | if (sys2memblk) { |
| 1717 | error_propagate(errp, local_err); |
| 1718 | } else { |
| 1719 | error_free(local_err); |
| 1720 | result->response = |
| 1721 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; |
| 1722 | } |
| 1723 | } |
| 1724 | goto out2; |
| 1725 | } |
| 1726 | |
| 1727 | if (sys2memblk) { |
| 1728 | char removable = '0'; |
| 1729 | |
| 1730 | mem_blk->online = (strncmp(status, "online", 6) == 0); |
| 1731 | |
| 1732 | ga_read_sysfs_file(dirfd, "removable", &removable, 1, &local_err); |
| 1733 | if (local_err) { |
| 1734 | /* if no 'removable' file, it doesn't support offline mem blk */ |
| 1735 | if (errno == ENOENT) { |
| 1736 | error_free(local_err); |
| 1737 | mem_blk->can_offline = false; |
| 1738 | } else { |
| 1739 | error_propagate(errp, local_err); |
| 1740 | } |
| 1741 | } else { |
| 1742 | mem_blk->can_offline = (removable != '0'); |
| 1743 | } |
| 1744 | } else { |
| 1745 | if (mem_blk->online != (strncmp(status, "online", 6) == 0)) { |
| 1746 | const char *new_state = mem_blk->online ? "online" : "offline"; |
| 1747 | |
| 1748 | ga_write_sysfs_file(dirfd, "state", new_state, strlen(new_state), |
| 1749 | &local_err); |
| 1750 | if (local_err) { |
| 1751 | error_free(local_err); |
| 1752 | result->response = |
| 1753 | GUEST_MEMORY_BLOCK_RESPONSE_TYPE_OPERATION_FAILED; |
| 1754 | goto out2; |
| 1755 | } |
| 1756 | |
| 1757 | result->response = GUEST_MEMORY_BLOCK_RESPONSE_TYPE_SUCCESS; |
| 1758 | result->has_error_code = false; |
| 1759 | } /* otherwise pretend successful re-(on|off)-lining */ |
| 1760 | } |
| 1761 | g_free(status); |
| 1762 | close(dirfd); |
| 1763 | return; |
| 1764 | |
| 1765 | out2: |
| 1766 | g_free(status); |
| 1767 | close(dirfd); |
| 1768 | out1: |
| 1769 | if (!sys2memblk) { |
| 1770 | result->has_error_code = true; |
| 1771 | result->error_code = errno; |
| 1772 | } |
| 1773 | } |
| 1774 | |
| 1775 | GuestMemoryBlockList *qmp_guest_get_memory_blocks(Error **errp) |
| 1776 | { |
| 1777 | GuestMemoryBlockList *head, **tail; |
| 1778 | Error *local_err = NULL; |
| 1779 | struct dirent *de; |
| 1780 | DIR *dp; |
| 1781 | |
| 1782 | head = NULL; |
| 1783 | tail = &head; |
| 1784 | |
| 1785 | dp = opendir("/sys/devices/system/memory/"); |
| 1786 | if (!dp) { |
| 1787 | /* it's ok if this happens to be a system that doesn't expose |
| 1788 | * memory blocks via sysfs, but otherwise we should report |
| 1789 | * an error |
| 1790 | */ |
| 1791 | if (errno != ENOENT) { |
| 1792 | error_setg_errno(errp, errno, "Can't open directory" |
| 1793 | "\"/sys/devices/system/memory/\""); |
| 1794 | } |
| 1795 | return NULL; |
| 1796 | } |
| 1797 | |
| 1798 | /* Note: the phys_index of memory block may be discontinuous, |
| 1799 | * this is because a memblk is the unit of the Sparse Memory design, which |
| 1800 | * allows discontinuous memory ranges (ex. NUMA), so here we should |
| 1801 | * traverse the memory block directory. |
| 1802 | */ |
| 1803 | while ((de = readdir(dp)) != NULL) { |
| 1804 | GuestMemoryBlock *mem_blk; |
| 1805 | |
| 1806 | if ((strncmp(de->d_name, "memory", 6) != 0) || |
| 1807 | !(de->d_type & DT_DIR)) { |
| 1808 | continue; |
| 1809 | } |
| 1810 | |
| 1811 | mem_blk = g_malloc0(sizeof *mem_blk); |
| 1812 | /* The d_name is "memoryXXX", phys_index is block id, same as XXX */ |
| 1813 | mem_blk->phys_index = strtoul(&de->d_name[6], NULL, 10); |
| 1814 | mem_blk->has_can_offline = true; /* lolspeak ftw */ |
| 1815 | transfer_memory_block(mem_blk, true, NULL, &local_err); |
| 1816 | if (local_err) { |
| 1817 | break; |
| 1818 | } |
| 1819 | |
| 1820 | QAPI_LIST_APPEND(tail, mem_blk); |
| 1821 | } |
| 1822 | |
| 1823 | closedir(dp); |
| 1824 | if (local_err == NULL) { |
| 1825 | /* there's no guest with zero memory blocks */ |
| 1826 | if (head == NULL) { |
| 1827 | error_setg(errp, "guest reported zero memory blocks!"); |
| 1828 | } |
| 1829 | return head; |
| 1830 | } |
| 1831 | |
| 1832 | qapi_free_GuestMemoryBlockList(head); |
| 1833 | error_propagate(errp, local_err); |
| 1834 | return NULL; |
| 1835 | } |
| 1836 | |
| 1837 | GuestMemoryBlockResponseList * |
| 1838 | qmp_guest_set_memory_blocks(GuestMemoryBlockList *mem_blks, Error **errp) |
| 1839 | { |
| 1840 | GuestMemoryBlockResponseList *head, **tail; |
| 1841 | Error *local_err = NULL; |
| 1842 | |
| 1843 | head = NULL; |
| 1844 | tail = &head; |
| 1845 | |
| 1846 | while (mem_blks != NULL) { |
| 1847 | GuestMemoryBlockResponse *result; |
| 1848 | GuestMemoryBlock *current_mem_blk = mem_blks->value; |
| 1849 | |
| 1850 | result = g_malloc0(sizeof(*result)); |
| 1851 | result->phys_index = current_mem_blk->phys_index; |
| 1852 | transfer_memory_block(current_mem_blk, false, result, &local_err); |
| 1853 | if (local_err) { /* should never happen */ |
| 1854 | goto err; |
| 1855 | } |
| 1856 | |
| 1857 | QAPI_LIST_APPEND(tail, result); |
| 1858 | mem_blks = mem_blks->next; |
| 1859 | } |
| 1860 | |
| 1861 | return head; |
| 1862 | err: |
| 1863 | qapi_free_GuestMemoryBlockResponseList(head); |
| 1864 | error_propagate(errp, local_err); |
| 1865 | return NULL; |
| 1866 | } |
| 1867 | |
| 1868 | GuestMemoryBlockInfo *qmp_guest_get_memory_block_info(Error **errp) |
| 1869 | { |
| 1870 | Error *local_err = NULL; |
| 1871 | char *dirpath; |
| 1872 | int dirfd; |
| 1873 | char *buf; |
| 1874 | GuestMemoryBlockInfo *info; |
| 1875 | |
| 1876 | dirpath = g_strdup_printf("/sys/devices/system/memory/"); |
| 1877 | dirfd = open(dirpath, O_RDONLY | O_DIRECTORY); |
| 1878 | if (dirfd == -1) { |
| 1879 | error_setg_errno(errp, errno, "open(\"%s\")", dirpath); |
| 1880 | g_free(dirpath); |
| 1881 | return NULL; |
| 1882 | } |
| 1883 | g_free(dirpath); |
| 1884 | |
| 1885 | buf = g_malloc0(20); |
| 1886 | ga_read_sysfs_file(dirfd, "block_size_bytes", buf, 20, &local_err); |
| 1887 | close(dirfd); |
| 1888 | if (local_err) { |
| 1889 | g_free(buf); |
| 1890 | error_propagate(errp, local_err); |
| 1891 | return NULL; |
| 1892 | } |
| 1893 | |
| 1894 | info = g_new0(GuestMemoryBlockInfo, 1); |
| 1895 | info->size = strtol(buf, NULL, 16); /* the unit is bytes */ |
| 1896 | |
| 1897 | g_free(buf); |
| 1898 | |
| 1899 | return info; |
| 1900 | } |
| 1901 | |
Daniel P. Berrangé | 74cbd9b | 2024-07-12 14:24:42 +0100 | [diff] [blame] | 1902 | #define MAX_NAME_LEN 128 |
| 1903 | static GuestDiskStatsInfoList *guest_get_diskstats(Error **errp) |
| 1904 | { |
| 1905 | GuestDiskStatsInfoList *head = NULL, **tail = &head; |
| 1906 | const char *diskstats = "/proc/diskstats"; |
| 1907 | FILE *fp; |
| 1908 | size_t n; |
| 1909 | char *line = NULL; |
| 1910 | |
| 1911 | fp = fopen(diskstats, "r"); |
| 1912 | if (fp == NULL) { |
| 1913 | error_setg_errno(errp, errno, "open(\"%s\")", diskstats); |
| 1914 | return NULL; |
| 1915 | } |
| 1916 | |
| 1917 | while (getline(&line, &n, fp) != -1) { |
| 1918 | g_autofree GuestDiskStatsInfo *diskstatinfo = NULL; |
| 1919 | g_autofree GuestDiskStats *diskstat = NULL; |
| 1920 | char dev_name[MAX_NAME_LEN]; |
| 1921 | unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks; |
| 1922 | unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios; |
| 1923 | unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec; |
| 1924 | unsigned long dc_ios, dc_merges, dc_sec, fl_ios; |
| 1925 | unsigned int major, minor; |
| 1926 | int i; |
| 1927 | |
| 1928 | i = sscanf(line, "%u %u %s %lu %lu %lu" |
| 1929 | "%lu %lu %lu %lu %u %u %u %u" |
| 1930 | "%lu %lu %lu %u %lu %u", |
| 1931 | &major, &minor, dev_name, |
| 1932 | &rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios, |
| 1933 | &rd_ticks_or_wr_sec, &wr_ios, &wr_merges, &wr_sec, |
| 1934 | &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks, |
| 1935 | &dc_ios, &dc_merges, &dc_sec, &dc_ticks, |
| 1936 | &fl_ios, &fl_ticks); |
| 1937 | |
| 1938 | if (i < 7) { |
| 1939 | continue; |
| 1940 | } |
| 1941 | |
| 1942 | diskstatinfo = g_new0(GuestDiskStatsInfo, 1); |
| 1943 | diskstatinfo->name = g_strdup(dev_name); |
| 1944 | diskstatinfo->major = major; |
| 1945 | diskstatinfo->minor = minor; |
| 1946 | |
| 1947 | diskstat = g_new0(GuestDiskStats, 1); |
| 1948 | if (i == 7) { |
| 1949 | diskstat->has_read_ios = true; |
| 1950 | diskstat->read_ios = rd_ios; |
| 1951 | diskstat->has_read_sectors = true; |
| 1952 | diskstat->read_sectors = rd_merges_or_rd_sec; |
| 1953 | diskstat->has_write_ios = true; |
| 1954 | diskstat->write_ios = rd_sec_or_wr_ios; |
| 1955 | diskstat->has_write_sectors = true; |
| 1956 | diskstat->write_sectors = rd_ticks_or_wr_sec; |
| 1957 | } |
| 1958 | if (i >= 14) { |
| 1959 | diskstat->has_read_ios = true; |
| 1960 | diskstat->read_ios = rd_ios; |
| 1961 | diskstat->has_read_sectors = true; |
| 1962 | diskstat->read_sectors = rd_sec_or_wr_ios; |
| 1963 | diskstat->has_read_merges = true; |
| 1964 | diskstat->read_merges = rd_merges_or_rd_sec; |
| 1965 | diskstat->has_read_ticks = true; |
| 1966 | diskstat->read_ticks = rd_ticks_or_wr_sec; |
| 1967 | diskstat->has_write_ios = true; |
| 1968 | diskstat->write_ios = wr_ios; |
| 1969 | diskstat->has_write_sectors = true; |
| 1970 | diskstat->write_sectors = wr_sec; |
| 1971 | diskstat->has_write_merges = true; |
| 1972 | diskstat->write_merges = wr_merges; |
| 1973 | diskstat->has_write_ticks = true; |
| 1974 | diskstat->write_ticks = wr_ticks; |
| 1975 | diskstat->has_ios_pgr = true; |
| 1976 | diskstat->ios_pgr = ios_pgr; |
| 1977 | diskstat->has_total_ticks = true; |
| 1978 | diskstat->total_ticks = tot_ticks; |
| 1979 | diskstat->has_weight_ticks = true; |
| 1980 | diskstat->weight_ticks = rq_ticks; |
| 1981 | } |
| 1982 | if (i >= 18) { |
| 1983 | diskstat->has_discard_ios = true; |
| 1984 | diskstat->discard_ios = dc_ios; |
| 1985 | diskstat->has_discard_merges = true; |
| 1986 | diskstat->discard_merges = dc_merges; |
| 1987 | diskstat->has_discard_sectors = true; |
| 1988 | diskstat->discard_sectors = dc_sec; |
| 1989 | diskstat->has_discard_ticks = true; |
| 1990 | diskstat->discard_ticks = dc_ticks; |
| 1991 | } |
| 1992 | if (i >= 20) { |
| 1993 | diskstat->has_flush_ios = true; |
| 1994 | diskstat->flush_ios = fl_ios; |
| 1995 | diskstat->has_flush_ticks = true; |
| 1996 | diskstat->flush_ticks = fl_ticks; |
| 1997 | } |
| 1998 | |
| 1999 | diskstatinfo->stats = g_steal_pointer(&diskstat); |
| 2000 | QAPI_LIST_APPEND(tail, diskstatinfo); |
| 2001 | diskstatinfo = NULL; |
| 2002 | } |
| 2003 | free(line); |
| 2004 | fclose(fp); |
| 2005 | return head; |
| 2006 | } |
| 2007 | |
| 2008 | GuestDiskStatsInfoList *qmp_guest_get_diskstats(Error **errp) |
| 2009 | { |
| 2010 | return guest_get_diskstats(errp); |
| 2011 | } |
| 2012 | |
| 2013 | GuestCpuStatsList *qmp_guest_get_cpustats(Error **errp) |
| 2014 | { |
| 2015 | GuestCpuStatsList *head = NULL, **tail = &head; |
| 2016 | const char *cpustats = "/proc/stat"; |
| 2017 | int clk_tck = sysconf(_SC_CLK_TCK); |
| 2018 | FILE *fp; |
| 2019 | size_t n; |
| 2020 | char *line = NULL; |
| 2021 | |
| 2022 | fp = fopen(cpustats, "r"); |
| 2023 | if (fp == NULL) { |
| 2024 | error_setg_errno(errp, errno, "open(\"%s\")", cpustats); |
| 2025 | return NULL; |
| 2026 | } |
| 2027 | |
| 2028 | while (getline(&line, &n, fp) != -1) { |
| 2029 | GuestCpuStats *cpustat = NULL; |
| 2030 | GuestLinuxCpuStats *linuxcpustat; |
| 2031 | int i; |
| 2032 | unsigned long user, system, idle, iowait, irq, softirq, steal, guest; |
| 2033 | unsigned long nice, guest_nice; |
| 2034 | char name[64]; |
| 2035 | |
| 2036 | i = sscanf(line, "%s %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu", |
| 2037 | name, &user, &nice, &system, &idle, &iowait, &irq, &softirq, |
| 2038 | &steal, &guest, &guest_nice); |
| 2039 | |
| 2040 | /* drop "cpu 1 2 3 ...", get "cpuX 1 2 3 ..." only */ |
| 2041 | if ((i == EOF) || strncmp(name, "cpu", 3) || (name[3] == '\0')) { |
| 2042 | continue; |
| 2043 | } |
| 2044 | |
| 2045 | if (i < 5) { |
| 2046 | slog("Parsing cpu stat from %s failed, see \"man proc\"", cpustats); |
| 2047 | break; |
| 2048 | } |
| 2049 | |
| 2050 | cpustat = g_new0(GuestCpuStats, 1); |
| 2051 | cpustat->type = GUEST_CPU_STATS_TYPE_LINUX; |
| 2052 | |
| 2053 | linuxcpustat = &cpustat->u.q_linux; |
| 2054 | linuxcpustat->cpu = atoi(&name[3]); |
| 2055 | linuxcpustat->user = user * 1000 / clk_tck; |
| 2056 | linuxcpustat->nice = nice * 1000 / clk_tck; |
| 2057 | linuxcpustat->system = system * 1000 / clk_tck; |
| 2058 | linuxcpustat->idle = idle * 1000 / clk_tck; |
| 2059 | |
| 2060 | if (i > 5) { |
| 2061 | linuxcpustat->has_iowait = true; |
| 2062 | linuxcpustat->iowait = iowait * 1000 / clk_tck; |
| 2063 | } |
| 2064 | |
| 2065 | if (i > 6) { |
| 2066 | linuxcpustat->has_irq = true; |
| 2067 | linuxcpustat->irq = irq * 1000 / clk_tck; |
| 2068 | linuxcpustat->has_softirq = true; |
| 2069 | linuxcpustat->softirq = softirq * 1000 / clk_tck; |
| 2070 | } |
| 2071 | |
| 2072 | if (i > 8) { |
| 2073 | linuxcpustat->has_steal = true; |
| 2074 | linuxcpustat->steal = steal * 1000 / clk_tck; |
| 2075 | } |
| 2076 | |
| 2077 | if (i > 9) { |
| 2078 | linuxcpustat->has_guest = true; |
| 2079 | linuxcpustat->guest = guest * 1000 / clk_tck; |
| 2080 | } |
| 2081 | |
| 2082 | if (i > 10) { |
| 2083 | linuxcpustat->has_guest = true; |
| 2084 | linuxcpustat->guest = guest * 1000 / clk_tck; |
| 2085 | linuxcpustat->has_guestnice = true; |
| 2086 | linuxcpustat->guestnice = guest_nice * 1000 / clk_tck; |
| 2087 | } |
| 2088 | |
| 2089 | QAPI_LIST_APPEND(tail, cpustat); |
| 2090 | } |
| 2091 | |
| 2092 | free(line); |
| 2093 | fclose(fp); |
| 2094 | return head; |
| 2095 | } |
Dehan Meng | 8e326d3 | 2024-06-13 17:28:02 +0800 | [diff] [blame] | 2096 | |
| 2097 | static char *hexToIPAddress(const void *hexValue, int is_ipv6) |
| 2098 | { |
| 2099 | if (is_ipv6) { |
| 2100 | char addr[INET6_ADDRSTRLEN]; |
| 2101 | struct in6_addr in6; |
| 2102 | const char *hexStr = (const char *)hexValue; |
| 2103 | int i; |
| 2104 | |
| 2105 | for (i = 0; i < 16; i++) { |
| 2106 | sscanf(&hexStr[i * 2], "%02hhx", &in6.s6_addr[i]); |
| 2107 | } |
| 2108 | inet_ntop(AF_INET6, &in6, addr, INET6_ADDRSTRLEN); |
| 2109 | |
| 2110 | return g_strdup(addr); |
| 2111 | } else { |
| 2112 | unsigned int hexInt = *(unsigned int *)hexValue; |
| 2113 | unsigned int byte1 = (hexInt >> 24) & 0xFF; |
| 2114 | unsigned int byte2 = (hexInt >> 16) & 0xFF; |
| 2115 | unsigned int byte3 = (hexInt >> 8) & 0xFF; |
| 2116 | unsigned int byte4 = hexInt & 0xFF; |
| 2117 | |
| 2118 | return g_strdup_printf("%u.%u.%u.%u", byte4, byte3, byte2, byte1); |
| 2119 | } |
| 2120 | } |
| 2121 | |
| 2122 | GuestNetworkRouteList *qmp_guest_network_get_route(Error **errp) |
| 2123 | { |
| 2124 | GuestNetworkRouteList *head = NULL, **tail = &head; |
| 2125 | const char *routeFiles[] = {"/proc/net/route", "/proc/net/ipv6_route"}; |
| 2126 | FILE *fp; |
| 2127 | size_t n; |
| 2128 | char *line = NULL; |
| 2129 | int firstLine; |
| 2130 | int is_ipv6; |
| 2131 | int i; |
| 2132 | |
| 2133 | for (i = 0; i < 2; i++) { |
| 2134 | firstLine = 1; |
| 2135 | is_ipv6 = (i == 1); |
| 2136 | fp = fopen(routeFiles[i], "r"); |
| 2137 | if (fp == NULL) { |
| 2138 | error_setg_errno(errp, errno, "open(\"%s\")", routeFiles[i]); |
| 2139 | free(line); |
| 2140 | continue; |
| 2141 | } |
| 2142 | |
| 2143 | while (getline(&line, &n, fp) != -1) { |
| 2144 | if (firstLine && !is_ipv6) { |
| 2145 | firstLine = 0; |
| 2146 | continue; |
| 2147 | } |
| 2148 | GuestNetworkRoute *route = NULL; |
| 2149 | GuestNetworkRoute *networkroute; |
| 2150 | char Iface[IFNAMSIZ]; |
| 2151 | if (is_ipv6) { |
| 2152 | char Destination[33], Source[33], NextHop[33]; |
| 2153 | int DesPrefixlen, SrcPrefixlen, Metric, RefCnt, Use, Flags; |
| 2154 | |
| 2155 | /* Parse the line and extract the values */ |
| 2156 | if (sscanf(line, "%32s %x %32s %x %32s %x %x %x %x %s", |
| 2157 | Destination, &DesPrefixlen, Source, |
| 2158 | &SrcPrefixlen, NextHop, &Metric, &RefCnt, |
| 2159 | &Use, &Flags, Iface) != 10) { |
| 2160 | continue; |
| 2161 | } |
| 2162 | |
| 2163 | route = g_new0(GuestNetworkRoute, 1); |
| 2164 | networkroute = route; |
| 2165 | networkroute->iface = g_strdup(Iface); |
| 2166 | networkroute->destination = hexToIPAddress(Destination, 1); |
| 2167 | networkroute->metric = Metric; |
| 2168 | networkroute->source = hexToIPAddress(Source, 1); |
| 2169 | networkroute->desprefixlen = g_strdup_printf( |
| 2170 | "%d", DesPrefixlen |
| 2171 | ); |
| 2172 | networkroute->srcprefixlen = g_strdup_printf( |
| 2173 | "%d", SrcPrefixlen |
| 2174 | ); |
| 2175 | networkroute->nexthop = hexToIPAddress(NextHop, 1); |
| 2176 | networkroute->has_flags = true; |
| 2177 | networkroute->flags = Flags; |
| 2178 | networkroute->has_refcnt = true; |
| 2179 | networkroute->refcnt = RefCnt; |
| 2180 | networkroute->has_use = true; |
| 2181 | networkroute->use = Use; |
| 2182 | networkroute->version = 6; |
| 2183 | } else { |
| 2184 | unsigned int Destination, Gateway, Mask, Flags; |
| 2185 | int RefCnt, Use, Metric, MTU, Window, IRTT; |
| 2186 | |
| 2187 | /* Parse the line and extract the values */ |
| 2188 | if (sscanf(line, "%s %X %X %x %d %d %d %X %d %d %d", |
| 2189 | Iface, &Destination, &Gateway, &Flags, &RefCnt, |
| 2190 | &Use, &Metric, &Mask, &MTU, &Window, &IRTT) != 11) { |
| 2191 | continue; |
| 2192 | } |
| 2193 | |
| 2194 | route = g_new0(GuestNetworkRoute, 1); |
| 2195 | networkroute = route; |
| 2196 | networkroute->iface = g_strdup(Iface); |
| 2197 | networkroute->destination = hexToIPAddress(&Destination, 0); |
| 2198 | networkroute->gateway = hexToIPAddress(&Gateway, 0); |
| 2199 | networkroute->mask = hexToIPAddress(&Mask, 0); |
| 2200 | networkroute->metric = Metric; |
| 2201 | networkroute->has_flags = true; |
| 2202 | networkroute->flags = Flags; |
| 2203 | networkroute->has_refcnt = true; |
| 2204 | networkroute->refcnt = RefCnt; |
| 2205 | networkroute->has_use = true; |
| 2206 | networkroute->use = Use; |
| 2207 | networkroute->has_mtu = true; |
| 2208 | networkroute->mtu = MTU; |
| 2209 | networkroute->has_window = true; |
| 2210 | networkroute->window = Window; |
| 2211 | networkroute->has_irtt = true; |
| 2212 | networkroute->irtt = IRTT; |
| 2213 | networkroute->version = 4; |
| 2214 | } |
| 2215 | |
| 2216 | QAPI_LIST_APPEND(tail, route); |
| 2217 | } |
| 2218 | |
| 2219 | free(line); |
| 2220 | fclose(fp); |
| 2221 | } |
| 2222 | |
| 2223 | return head; |
| 2224 | } |