Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Privileged helper to handle persistent reservation commands for QEMU |
| 3 | * |
| 4 | * Copyright (C) 2017 Red Hat, Inc. <pbonzini@redhat.com> |
| 5 | * |
| 6 | * Author: Paolo Bonzini <pbonzini@redhat.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; under version 2 of the License. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include <getopt.h> |
| 23 | #include <sys/ioctl.h> |
| 24 | #include <linux/dm-ioctl.h> |
| 25 | #include <scsi/sg.h> |
| 26 | |
Paolo Bonzini | a358bca | 2019-11-29 11:42:53 +0100 | [diff] [blame] | 27 | #ifdef CONFIG_LIBCAP_NG |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 28 | #include <cap-ng.h> |
| 29 | #endif |
| 30 | #include <pwd.h> |
| 31 | #include <grp.h> |
| 32 | |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 33 | #ifdef CONFIG_MPATH |
| 34 | #include <libudev.h> |
| 35 | #include <mpath_cmd.h> |
| 36 | #include <mpath_persist.h> |
| 37 | #endif |
| 38 | |
Markus Armbruster | a8d2532 | 2019-05-23 16:35:08 +0200 | [diff] [blame] | 39 | #include "qemu-common.h" |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 40 | #include "qapi/error.h" |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 41 | #include "qemu/cutils.h" |
| 42 | #include "qemu/main-loop.h" |
Markus Armbruster | 0b8fa32 | 2019-05-23 16:35:07 +0200 | [diff] [blame] | 43 | #include "qemu/module.h" |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 44 | #include "qemu/error-report.h" |
| 45 | #include "qemu/config-file.h" |
| 46 | #include "qemu/bswap.h" |
| 47 | #include "qemu/log.h" |
| 48 | #include "qemu/systemd.h" |
| 49 | #include "qapi/util.h" |
| 50 | #include "qapi/qmp/qstring.h" |
| 51 | #include "io/channel-socket.h" |
| 52 | #include "trace/control.h" |
| 53 | #include "qemu-version.h" |
| 54 | |
| 55 | #include "block/aio.h" |
| 56 | #include "block/thread-pool.h" |
| 57 | |
| 58 | #include "scsi/constants.h" |
| 59 | #include "scsi/utils.h" |
| 60 | #include "pr-helper.h" |
| 61 | |
| 62 | #define PR_OUT_FIXED_PARAM_SIZE 24 |
| 63 | |
| 64 | static char *socket_path; |
| 65 | static char *pidfile; |
| 66 | static enum { RUNNING, TERMINATE, TERMINATING } state; |
| 67 | static QIOChannelSocket *server_ioc; |
| 68 | static int server_watch; |
| 69 | static int num_active_sockets = 1; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 70 | static int noisy; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 71 | static int verbose; |
| 72 | |
Paolo Bonzini | a358bca | 2019-11-29 11:42:53 +0100 | [diff] [blame] | 73 | #ifdef CONFIG_LIBCAP_NG |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 74 | static int uid = -1; |
| 75 | static int gid = -1; |
| 76 | #endif |
| 77 | |
Paolo Bonzini | 50fa332 | 2018-06-26 13:55:04 +0200 | [diff] [blame] | 78 | static void compute_default_paths(void) |
| 79 | { |
Michal Privoznik | 2729d79 | 2018-07-03 11:51:14 +0200 | [diff] [blame] | 80 | socket_path = qemu_get_local_state_pathname("run/qemu-pr-helper.sock"); |
| 81 | pidfile = qemu_get_local_state_pathname("run/qemu-pr-helper.pid"); |
Paolo Bonzini | 50fa332 | 2018-06-26 13:55:04 +0200 | [diff] [blame] | 82 | } |
| 83 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 84 | static void usage(const char *name) |
| 85 | { |
| 86 | (printf) ( |
| 87 | "Usage: %s [OPTIONS] FILE\n" |
| 88 | "Persistent Reservation helper program for QEMU\n" |
| 89 | "\n" |
| 90 | " -h, --help display this help and exit\n" |
| 91 | " -V, --version output version information and exit\n" |
| 92 | "\n" |
| 93 | " -d, --daemon run in the background\n" |
| 94 | " -f, --pidfile=PATH PID file when running as a daemon\n" |
| 95 | " (default '%s')\n" |
| 96 | " -k, --socket=PATH path to the unix socket\n" |
| 97 | " (default '%s')\n" |
| 98 | " -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" |
| 99 | " specify tracing options\n" |
Paolo Bonzini | a358bca | 2019-11-29 11:42:53 +0100 | [diff] [blame] | 100 | #ifdef CONFIG_LIBCAP_NG |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 101 | " -u, --user=USER user to drop privileges to\n" |
| 102 | " -g, --group=GROUP group to drop privileges to\n" |
| 103 | #endif |
| 104 | "\n" |
| 105 | QEMU_HELP_BOTTOM "\n" |
| 106 | , name, pidfile, socket_path); |
| 107 | } |
| 108 | |
| 109 | static void version(const char *name) |
| 110 | { |
| 111 | printf( |
Thomas Huth | 7e563bf | 2018-02-15 12:06:47 +0100 | [diff] [blame] | 112 | "%s " QEMU_FULL_VERSION "\n" |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 113 | "Written by Paolo Bonzini.\n" |
| 114 | "\n" |
| 115 | QEMU_COPYRIGHT "\n" |
| 116 | "This is free software; see the source for copying conditions. There is NO\n" |
| 117 | "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n" |
| 118 | , name); |
| 119 | } |
| 120 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 121 | /* SG_IO support */ |
| 122 | |
| 123 | typedef struct PRHelperSGIOData { |
| 124 | int fd; |
| 125 | const uint8_t *cdb; |
| 126 | uint8_t *sense; |
| 127 | uint8_t *buf; |
| 128 | int sz; /* input/output */ |
| 129 | int dir; |
| 130 | } PRHelperSGIOData; |
| 131 | |
| 132 | static int do_sgio_worker(void *opaque) |
| 133 | { |
| 134 | PRHelperSGIOData *data = opaque; |
| 135 | struct sg_io_hdr io_hdr; |
| 136 | int ret; |
| 137 | int status; |
| 138 | SCSISense sense_code; |
| 139 | |
| 140 | memset(data->sense, 0, PR_HELPER_SENSE_SIZE); |
| 141 | memset(&io_hdr, 0, sizeof(io_hdr)); |
| 142 | io_hdr.interface_id = 'S'; |
| 143 | io_hdr.cmd_len = PR_HELPER_CDB_SIZE; |
| 144 | io_hdr.cmdp = (uint8_t *)data->cdb; |
| 145 | io_hdr.sbp = data->sense; |
| 146 | io_hdr.mx_sb_len = PR_HELPER_SENSE_SIZE; |
| 147 | io_hdr.timeout = 1; |
| 148 | io_hdr.dxfer_direction = data->dir; |
| 149 | io_hdr.dxferp = (char *)data->buf; |
| 150 | io_hdr.dxfer_len = data->sz; |
| 151 | ret = ioctl(data->fd, SG_IO, &io_hdr); |
Hannes Reinecke | a108557 | 2020-11-16 19:40:40 +0100 | [diff] [blame] | 152 | |
| 153 | if (ret < 0) { |
| 154 | status = scsi_sense_from_errno(errno, &sense_code); |
| 155 | if (status == CHECK_CONDITION) { |
| 156 | scsi_build_sense(data->sense, sense_code); |
| 157 | } |
| 158 | } else if (io_hdr.host_status != SCSI_HOST_OK) { |
| 159 | status = scsi_sense_from_host_status(io_hdr.host_status, &sense_code); |
| 160 | if (status == CHECK_CONDITION) { |
| 161 | scsi_build_sense(data->sense, sense_code); |
| 162 | } |
| 163 | } else if (io_hdr.driver_status & SG_ERR_DRIVER_TIMEOUT) { |
| 164 | status = BUSY; |
| 165 | } else { |
| 166 | status = io_hdr.status; |
| 167 | } |
| 168 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 169 | if (status == GOOD) { |
| 170 | data->sz -= io_hdr.resid; |
| 171 | } else { |
| 172 | data->sz = 0; |
| 173 | } |
| 174 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 175 | return status; |
| 176 | } |
| 177 | |
| 178 | static int do_sgio(int fd, const uint8_t *cdb, uint8_t *sense, |
| 179 | uint8_t *buf, int *sz, int dir) |
| 180 | { |
| 181 | ThreadPool *pool = aio_get_thread_pool(qemu_get_aio_context()); |
| 182 | int r; |
| 183 | |
| 184 | PRHelperSGIOData data = { |
| 185 | .fd = fd, |
| 186 | .cdb = cdb, |
| 187 | .sense = sense, |
| 188 | .buf = buf, |
| 189 | .sz = *sz, |
| 190 | .dir = dir, |
| 191 | }; |
| 192 | |
| 193 | r = thread_pool_submit_co(pool, do_sgio_worker, &data); |
| 194 | *sz = data.sz; |
| 195 | return r; |
| 196 | } |
| 197 | |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 198 | /* Device mapper interface */ |
| 199 | |
| 200 | #ifdef CONFIG_MPATH |
| 201 | #define CONTROL_PATH "/dev/mapper/control" |
| 202 | |
| 203 | typedef struct DMData { |
| 204 | struct dm_ioctl dm; |
| 205 | uint8_t data[1024]; |
| 206 | } DMData; |
| 207 | |
| 208 | static int control_fd; |
| 209 | |
| 210 | static void *dm_ioctl(int ioc, struct dm_ioctl *dm) |
| 211 | { |
| 212 | static DMData d; |
| 213 | memcpy(&d.dm, dm, sizeof(d.dm)); |
| 214 | QEMU_BUILD_BUG_ON(sizeof(d.data) < sizeof(struct dm_target_spec)); |
| 215 | |
| 216 | d.dm.version[0] = DM_VERSION_MAJOR; |
| 217 | d.dm.version[1] = 0; |
| 218 | d.dm.version[2] = 0; |
| 219 | d.dm.data_size = 1024; |
| 220 | d.dm.data_start = offsetof(DMData, data); |
| 221 | if (ioctl(control_fd, ioc, &d) < 0) { |
| 222 | return NULL; |
| 223 | } |
| 224 | memcpy(dm, &d.dm, sizeof(d.dm)); |
| 225 | return &d.data; |
| 226 | } |
| 227 | |
| 228 | static void *dm_dev_ioctl(int fd, int ioc, struct dm_ioctl *dm) |
| 229 | { |
| 230 | struct stat st; |
| 231 | int r; |
| 232 | |
| 233 | r = fstat(fd, &st); |
| 234 | if (r < 0) { |
| 235 | perror("fstat"); |
| 236 | exit(1); |
| 237 | } |
| 238 | |
| 239 | dm->dev = st.st_rdev; |
| 240 | return dm_ioctl(ioc, dm); |
| 241 | } |
| 242 | |
| 243 | static void dm_init(void) |
| 244 | { |
| 245 | control_fd = open(CONTROL_PATH, O_RDWR); |
| 246 | if (control_fd < 0) { |
| 247 | perror("Cannot open " CONTROL_PATH); |
| 248 | exit(1); |
| 249 | } |
John Snow | 039d4e3 | 2018-11-27 13:49:29 -0500 | [diff] [blame] | 250 | struct dm_ioctl dm = { }; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 251 | if (!dm_ioctl(DM_VERSION, &dm)) { |
| 252 | perror("ioctl"); |
| 253 | exit(1); |
| 254 | } |
| 255 | if (dm.version[0] != DM_VERSION_MAJOR) { |
| 256 | fprintf(stderr, "Unsupported device mapper interface"); |
| 257 | exit(1); |
| 258 | } |
| 259 | } |
| 260 | |
| 261 | /* Variables required by libmultipath and libmpathpersist. */ |
| 262 | QEMU_BUILD_BUG_ON(PR_HELPER_DATA_SIZE > MPATH_MAX_PARAM_LEN); |
Paolo Bonzini | b3f1c8c | 2017-10-17 20:11:58 +0200 | [diff] [blame] | 263 | static struct config *multipath_conf; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 264 | unsigned mpath_mx_alloc_len = PR_HELPER_DATA_SIZE; |
| 265 | int logsink; |
Paolo Bonzini | b3f1c8c | 2017-10-17 20:11:58 +0200 | [diff] [blame] | 266 | struct udev *udev; |
| 267 | |
| 268 | extern struct config *get_multipath_config(void); |
| 269 | struct config *get_multipath_config(void) |
| 270 | { |
| 271 | return multipath_conf; |
| 272 | } |
| 273 | |
| 274 | extern void put_multipath_config(struct config *conf); |
| 275 | void put_multipath_config(struct config *conf) |
| 276 | { |
| 277 | } |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 278 | |
| 279 | static void multipath_pr_init(void) |
| 280 | { |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 281 | udev = udev_new(); |
Murilo Opsfelder Araujo | 1b0578f | 2018-08-10 11:11:16 -0300 | [diff] [blame] | 282 | #ifdef CONFIG_MPATH_NEW_API |
Paolo Bonzini | b3f1c8c | 2017-10-17 20:11:58 +0200 | [diff] [blame] | 283 | multipath_conf = mpath_lib_init(); |
Murilo Opsfelder Araujo | 1b0578f | 2018-08-10 11:11:16 -0300 | [diff] [blame] | 284 | #else |
| 285 | mpath_lib_init(udev); |
| 286 | #endif |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 287 | } |
| 288 | |
| 289 | static int is_mpath(int fd) |
| 290 | { |
| 291 | struct dm_ioctl dm = { .flags = DM_NOFLUSH_FLAG }; |
| 292 | struct dm_target_spec *tgt; |
| 293 | |
| 294 | tgt = dm_dev_ioctl(fd, DM_TABLE_STATUS, &dm); |
| 295 | if (!tgt) { |
| 296 | if (errno == ENXIO) { |
| 297 | return 0; |
| 298 | } |
| 299 | perror("ioctl"); |
| 300 | exit(EXIT_FAILURE); |
| 301 | } |
| 302 | return !strncmp(tgt->target_type, "multipath", DM_MAX_TYPE_NAME); |
| 303 | } |
| 304 | |
Paolo Bonzini | a4a9b6e | 2017-12-01 18:40:06 +0100 | [diff] [blame] | 305 | static SCSISense mpath_generic_sense(int r) |
| 306 | { |
| 307 | switch (r) { |
| 308 | case MPATH_PR_SENSE_NOT_READY: |
| 309 | return SENSE_CODE(NOT_READY); |
| 310 | case MPATH_PR_SENSE_MEDIUM_ERROR: |
| 311 | return SENSE_CODE(READ_ERROR); |
| 312 | case MPATH_PR_SENSE_HARDWARE_ERROR: |
| 313 | return SENSE_CODE(TARGET_FAILURE); |
| 314 | case MPATH_PR_SENSE_ABORTED_COMMAND: |
| 315 | return SENSE_CODE(IO_ERROR); |
| 316 | default: |
| 317 | abort(); |
| 318 | } |
| 319 | } |
| 320 | |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 321 | static int mpath_reconstruct_sense(int fd, int r, uint8_t *sense) |
| 322 | { |
| 323 | switch (r) { |
| 324 | case MPATH_PR_SUCCESS: |
| 325 | return GOOD; |
| 326 | case MPATH_PR_SENSE_NOT_READY: |
| 327 | case MPATH_PR_SENSE_MEDIUM_ERROR: |
| 328 | case MPATH_PR_SENSE_HARDWARE_ERROR: |
| 329 | case MPATH_PR_SENSE_ABORTED_COMMAND: |
| 330 | { |
| 331 | /* libmpathpersist ate the exact sense. Try to find it by |
| 332 | * issuing TEST UNIT READY. |
| 333 | */ |
| 334 | uint8_t cdb[6] = { TEST_UNIT_READY }; |
| 335 | int sz = 0; |
Maxim Levitsky | b2aca78 | 2019-09-24 02:38:48 +0300 | [diff] [blame] | 336 | int ret = do_sgio(fd, cdb, sense, NULL, &sz, SG_DXFER_NONE); |
Paolo Bonzini | a4a9b6e | 2017-12-01 18:40:06 +0100 | [diff] [blame] | 337 | |
Maxim Levitsky | b2aca78 | 2019-09-24 02:38:48 +0300 | [diff] [blame] | 338 | if (ret != GOOD) { |
| 339 | return ret; |
Paolo Bonzini | a4a9b6e | 2017-12-01 18:40:06 +0100 | [diff] [blame] | 340 | } |
| 341 | scsi_build_sense(sense, mpath_generic_sense(r)); |
| 342 | return CHECK_CONDITION; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | case MPATH_PR_SENSE_UNIT_ATTENTION: |
| 346 | /* Congratulations libmpathpersist, you ruined the Unit Attention... |
| 347 | * Return a heavyweight one. |
| 348 | */ |
| 349 | scsi_build_sense(sense, SENSE_CODE(SCSI_BUS_RESET)); |
| 350 | return CHECK_CONDITION; |
| 351 | case MPATH_PR_SENSE_INVALID_OP: |
| 352 | /* Only one valid sense. */ |
| 353 | scsi_build_sense(sense, SENSE_CODE(INVALID_OPCODE)); |
| 354 | return CHECK_CONDITION; |
| 355 | case MPATH_PR_ILLEGAL_REQ: |
| 356 | /* Guess. */ |
| 357 | scsi_build_sense(sense, SENSE_CODE(INVALID_PARAM)); |
| 358 | return CHECK_CONDITION; |
| 359 | case MPATH_PR_NO_SENSE: |
| 360 | scsi_build_sense(sense, SENSE_CODE(NO_SENSE)); |
| 361 | return CHECK_CONDITION; |
| 362 | |
| 363 | case MPATH_PR_RESERV_CONFLICT: |
| 364 | return RESERVATION_CONFLICT; |
| 365 | |
| 366 | case MPATH_PR_OTHER: |
| 367 | default: |
| 368 | scsi_build_sense(sense, SENSE_CODE(LUN_COMM_FAILURE)); |
| 369 | return CHECK_CONDITION; |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | static int multipath_pr_in(int fd, const uint8_t *cdb, uint8_t *sense, |
| 374 | uint8_t *data, int sz) |
| 375 | { |
| 376 | int rq_servact = cdb[1]; |
| 377 | struct prin_resp resp; |
| 378 | size_t written; |
| 379 | int r; |
| 380 | |
| 381 | switch (rq_servact) { |
| 382 | case MPATH_PRIN_RKEY_SA: |
| 383 | case MPATH_PRIN_RRES_SA: |
| 384 | case MPATH_PRIN_RCAP_SA: |
| 385 | break; |
| 386 | case MPATH_PRIN_RFSTAT_SA: |
| 387 | /* Nobody implements it anyway, so bail out. */ |
| 388 | default: |
| 389 | /* Cannot parse any other output. */ |
| 390 | scsi_build_sense(sense, SENSE_CODE(INVALID_FIELD)); |
| 391 | return CHECK_CONDITION; |
| 392 | } |
| 393 | |
| 394 | r = mpath_persistent_reserve_in(fd, rq_servact, &resp, noisy, verbose); |
| 395 | if (r == MPATH_PR_SUCCESS) { |
| 396 | switch (rq_servact) { |
| 397 | case MPATH_PRIN_RKEY_SA: |
| 398 | case MPATH_PRIN_RRES_SA: { |
| 399 | struct prin_readdescr *out = &resp.prin_descriptor.prin_readkeys; |
| 400 | assert(sz >= 8); |
| 401 | written = MIN(out->additional_length + 8, sz); |
| 402 | stl_be_p(&data[0], out->prgeneration); |
| 403 | stl_be_p(&data[4], out->additional_length); |
| 404 | memcpy(&data[8], out->key_list, written - 8); |
| 405 | break; |
| 406 | } |
| 407 | case MPATH_PRIN_RCAP_SA: { |
| 408 | struct prin_capdescr *out = &resp.prin_descriptor.prin_readcap; |
| 409 | assert(sz >= 6); |
| 410 | written = 6; |
| 411 | stw_be_p(&data[0], out->length); |
| 412 | data[2] = out->flags[0]; |
| 413 | data[3] = out->flags[1]; |
| 414 | stw_be_p(&data[4], out->pr_type_mask); |
| 415 | break; |
| 416 | } |
| 417 | default: |
| 418 | scsi_build_sense(sense, SENSE_CODE(INVALID_OPCODE)); |
| 419 | return CHECK_CONDITION; |
| 420 | } |
| 421 | assert(written <= sz); |
| 422 | memset(data + written, 0, sz - written); |
| 423 | } |
| 424 | |
| 425 | return mpath_reconstruct_sense(fd, r, sense); |
| 426 | } |
| 427 | |
| 428 | static int multipath_pr_out(int fd, const uint8_t *cdb, uint8_t *sense, |
| 429 | const uint8_t *param, int sz) |
| 430 | { |
| 431 | int rq_servact = cdb[1]; |
| 432 | int rq_scope = cdb[2] >> 4; |
| 433 | int rq_type = cdb[2] & 0xf; |
Christophe de Dinechin | 4ce1e15 | 2020-02-28 16:00:59 +0100 | [diff] [blame] | 434 | g_autofree struct prout_param_descriptor *paramp = NULL; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 435 | char transportids[PR_HELPER_DATA_SIZE]; |
| 436 | int r; |
| 437 | |
Christophe de Dinechin | 4ce1e15 | 2020-02-28 16:00:59 +0100 | [diff] [blame] | 438 | paramp = g_malloc0(sizeof(struct prout_param_descriptor) |
| 439 | + sizeof(struct transportid *) * MPATH_MX_TIDS); |
| 440 | |
Paolo Bonzini | ee8c13b | 2018-07-02 14:21:58 +0200 | [diff] [blame] | 441 | if (sz < PR_OUT_FIXED_PARAM_SIZE) { |
| 442 | /* Illegal request, Parameter list length error. This isn't fatal; |
| 443 | * we have read the data, send an error without closing the socket. |
| 444 | */ |
| 445 | scsi_build_sense(sense, SENSE_CODE(INVALID_PARAM_LEN)); |
| 446 | return CHECK_CONDITION; |
| 447 | } |
| 448 | |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 449 | switch (rq_servact) { |
| 450 | case MPATH_PROUT_REG_SA: |
| 451 | case MPATH_PROUT_RES_SA: |
| 452 | case MPATH_PROUT_REL_SA: |
| 453 | case MPATH_PROUT_CLEAR_SA: |
| 454 | case MPATH_PROUT_PREE_SA: |
| 455 | case MPATH_PROUT_PREE_AB_SA: |
| 456 | case MPATH_PROUT_REG_IGN_SA: |
| 457 | break; |
| 458 | case MPATH_PROUT_REG_MOV_SA: |
| 459 | /* Not supported by struct prout_param_descriptor. */ |
| 460 | default: |
| 461 | /* Cannot parse any other input. */ |
| 462 | scsi_build_sense(sense, SENSE_CODE(INVALID_FIELD)); |
| 463 | return CHECK_CONDITION; |
| 464 | } |
| 465 | |
| 466 | /* Convert input data, especially transport IDs, to the structs |
| 467 | * used by libmpathpersist (which, of course, will immediately |
| 468 | * do the opposite). |
| 469 | */ |
Christophe de Dinechin | 4ce1e15 | 2020-02-28 16:00:59 +0100 | [diff] [blame] | 470 | memcpy(¶mp->key, ¶m[0], 8); |
| 471 | memcpy(¶mp->sa_key, ¶m[8], 8); |
| 472 | paramp->sa_flags = param[20]; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 473 | if (sz > PR_OUT_FIXED_PARAM_SIZE) { |
| 474 | size_t transportid_len; |
| 475 | int i, j; |
| 476 | if (sz < PR_OUT_FIXED_PARAM_SIZE + 4) { |
| 477 | scsi_build_sense(sense, SENSE_CODE(INVALID_PARAM_LEN)); |
| 478 | return CHECK_CONDITION; |
| 479 | } |
| 480 | transportid_len = ldl_be_p(¶m[24]) + PR_OUT_FIXED_PARAM_SIZE + 4; |
| 481 | if (transportid_len > sz) { |
| 482 | scsi_build_sense(sense, SENSE_CODE(INVALID_PARAM)); |
| 483 | return CHECK_CONDITION; |
| 484 | } |
| 485 | for (i = PR_OUT_FIXED_PARAM_SIZE + 4, j = 0; i < transportid_len; ) { |
| 486 | struct transportid *id = (struct transportid *) &transportids[j]; |
| 487 | int len; |
| 488 | |
| 489 | id->format_code = param[i] & 0xc0; |
| 490 | id->protocol_id = param[i] & 0x0f; |
| 491 | switch (param[i] & 0xcf) { |
| 492 | case 0: |
| 493 | /* FC transport. */ |
| 494 | if (i + 24 > transportid_len) { |
| 495 | goto illegal_req; |
| 496 | } |
| 497 | memcpy(id->n_port_name, ¶m[i + 8], 8); |
| 498 | j += offsetof(struct transportid, n_port_name[8]); |
| 499 | i += 24; |
| 500 | break; |
Paolo Bonzini | a4a9b6e | 2017-12-01 18:40:06 +0100 | [diff] [blame] | 501 | case 5: |
| 502 | case 0x45: |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 503 | /* iSCSI transport. */ |
| 504 | len = lduw_be_p(¶m[i + 2]); |
| 505 | if (len > 252 || (len & 3) || i + len + 4 > transportid_len) { |
| 506 | /* For format code 00, the standard says the maximum is 223 |
| 507 | * plus the NUL terminator. For format code 01 there is no |
| 508 | * maximum length, but libmpathpersist ignores the first |
| 509 | * byte of id->iscsi_name so our maximum is 252. |
| 510 | */ |
| 511 | goto illegal_req; |
| 512 | } |
| 513 | if (memchr(¶m[i + 4], 0, len) == NULL) { |
| 514 | goto illegal_req; |
| 515 | } |
| 516 | memcpy(id->iscsi_name, ¶m[i + 2], len + 2); |
| 517 | j += offsetof(struct transportid, iscsi_name[len + 2]); |
| 518 | i += len + 4; |
| 519 | break; |
| 520 | case 6: |
| 521 | /* SAS transport. */ |
| 522 | if (i + 24 > transportid_len) { |
| 523 | goto illegal_req; |
| 524 | } |
| 525 | memcpy(id->sas_address, ¶m[i + 4], 8); |
| 526 | j += offsetof(struct transportid, sas_address[8]); |
| 527 | i += 24; |
| 528 | break; |
| 529 | default: |
| 530 | illegal_req: |
| 531 | scsi_build_sense(sense, SENSE_CODE(INVALID_PARAM)); |
| 532 | return CHECK_CONDITION; |
| 533 | } |
| 534 | |
Christophe de Dinechin | 4ce1e15 | 2020-02-28 16:00:59 +0100 | [diff] [blame] | 535 | assert(paramp->num_transportid < MPATH_MX_TIDS); |
| 536 | paramp->trnptid_list[paramp->num_transportid++] = id; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 537 | } |
| 538 | } |
| 539 | |
| 540 | r = mpath_persistent_reserve_out(fd, rq_servact, rq_scope, rq_type, |
Christophe de Dinechin | 4ce1e15 | 2020-02-28 16:00:59 +0100 | [diff] [blame] | 541 | paramp, noisy, verbose); |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 542 | return mpath_reconstruct_sense(fd, r, sense); |
| 543 | } |
| 544 | #endif |
| 545 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 546 | static int do_pr_in(int fd, const uint8_t *cdb, uint8_t *sense, |
| 547 | uint8_t *data, int *resp_sz) |
| 548 | { |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 549 | #ifdef CONFIG_MPATH |
| 550 | if (is_mpath(fd)) { |
| 551 | /* multipath_pr_in fills the whole input buffer. */ |
Paolo Bonzini | 86933b4 | 2018-06-20 19:36:15 +0200 | [diff] [blame] | 552 | int r = multipath_pr_in(fd, cdb, sense, data, *resp_sz); |
| 553 | if (r != GOOD) { |
| 554 | *resp_sz = 0; |
| 555 | } |
| 556 | return r; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 557 | } |
| 558 | #endif |
| 559 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 560 | return do_sgio(fd, cdb, sense, data, resp_sz, |
| 561 | SG_DXFER_FROM_DEV); |
| 562 | } |
| 563 | |
| 564 | static int do_pr_out(int fd, const uint8_t *cdb, uint8_t *sense, |
| 565 | const uint8_t *param, int sz) |
| 566 | { |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 567 | int resp_sz; |
Paolo Bonzini | ee8c13b | 2018-07-02 14:21:58 +0200 | [diff] [blame] | 568 | |
| 569 | if ((fcntl(fd, F_GETFL) & O_ACCMODE) == O_RDONLY) { |
| 570 | scsi_build_sense(sense, SENSE_CODE(INVALID_OPCODE)); |
| 571 | return CHECK_CONDITION; |
| 572 | } |
| 573 | |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 574 | #ifdef CONFIG_MPATH |
| 575 | if (is_mpath(fd)) { |
| 576 | return multipath_pr_out(fd, cdb, sense, param, sz); |
| 577 | } |
| 578 | #endif |
| 579 | |
| 580 | resp_sz = sz; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 581 | return do_sgio(fd, cdb, sense, (uint8_t *)param, &resp_sz, |
| 582 | SG_DXFER_TO_DEV); |
| 583 | } |
| 584 | |
| 585 | /* Client */ |
| 586 | |
| 587 | typedef struct PRHelperClient { |
| 588 | QIOChannelSocket *ioc; |
| 589 | Coroutine *co; |
| 590 | int fd; |
| 591 | uint8_t data[PR_HELPER_DATA_SIZE]; |
| 592 | } PRHelperClient; |
| 593 | |
| 594 | typedef struct PRHelperRequest { |
| 595 | int fd; |
| 596 | size_t sz; |
| 597 | uint8_t cdb[PR_HELPER_CDB_SIZE]; |
| 598 | } PRHelperRequest; |
| 599 | |
| 600 | static int coroutine_fn prh_read(PRHelperClient *client, void *buf, int sz, |
| 601 | Error **errp) |
| 602 | { |
| 603 | int ret = 0; |
| 604 | |
| 605 | while (sz > 0) { |
| 606 | int *fds = NULL; |
| 607 | size_t nfds = 0; |
| 608 | int i; |
| 609 | struct iovec iov; |
| 610 | ssize_t n_read; |
| 611 | |
| 612 | iov.iov_base = buf; |
| 613 | iov.iov_len = sz; |
| 614 | n_read = qio_channel_readv_full(QIO_CHANNEL(client->ioc), &iov, 1, |
| 615 | &fds, &nfds, errp); |
| 616 | |
| 617 | if (n_read == QIO_CHANNEL_ERR_BLOCK) { |
| 618 | qio_channel_yield(QIO_CHANNEL(client->ioc), G_IO_IN); |
| 619 | continue; |
| 620 | } |
| 621 | if (n_read <= 0) { |
| 622 | ret = n_read ? n_read : -1; |
| 623 | goto err; |
| 624 | } |
| 625 | |
| 626 | /* Stash one file descriptor per request. */ |
| 627 | if (nfds) { |
| 628 | bool too_many = false; |
| 629 | for (i = 0; i < nfds; i++) { |
| 630 | if (client->fd == -1) { |
| 631 | client->fd = fds[i]; |
| 632 | } else { |
| 633 | close(fds[i]); |
| 634 | too_many = true; |
| 635 | } |
| 636 | } |
| 637 | g_free(fds); |
| 638 | if (too_many) { |
| 639 | ret = -1; |
| 640 | goto err; |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | buf += n_read; |
| 645 | sz -= n_read; |
| 646 | } |
| 647 | |
| 648 | return 0; |
| 649 | |
| 650 | err: |
| 651 | if (client->fd != -1) { |
| 652 | close(client->fd); |
| 653 | client->fd = -1; |
| 654 | } |
| 655 | return ret; |
| 656 | } |
| 657 | |
| 658 | static int coroutine_fn prh_read_request(PRHelperClient *client, |
| 659 | PRHelperRequest *req, |
| 660 | PRHelperResponse *resp, Error **errp) |
| 661 | { |
| 662 | uint32_t sz; |
| 663 | |
| 664 | if (prh_read(client, req->cdb, sizeof(req->cdb), NULL) < 0) { |
| 665 | return -1; |
| 666 | } |
| 667 | |
| 668 | if (client->fd == -1) { |
| 669 | error_setg(errp, "No file descriptor in request."); |
| 670 | return -1; |
| 671 | } |
| 672 | |
| 673 | if (req->cdb[0] != PERSISTENT_RESERVE_OUT && |
| 674 | req->cdb[0] != PERSISTENT_RESERVE_IN) { |
| 675 | error_setg(errp, "Invalid CDB, closing socket."); |
| 676 | goto out_close; |
| 677 | } |
| 678 | |
| 679 | sz = scsi_cdb_xfer(req->cdb); |
| 680 | if (sz > sizeof(client->data)) { |
| 681 | goto out_close; |
| 682 | } |
| 683 | |
| 684 | if (req->cdb[0] == PERSISTENT_RESERVE_OUT) { |
| 685 | if (qio_channel_read_all(QIO_CHANNEL(client->ioc), |
| 686 | (char *)client->data, sz, |
| 687 | errp) < 0) { |
| 688 | goto out_close; |
| 689 | } |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 690 | } |
| 691 | |
| 692 | req->fd = client->fd; |
| 693 | req->sz = sz; |
| 694 | client->fd = -1; |
| 695 | return sz; |
| 696 | |
| 697 | out_close: |
| 698 | close(client->fd); |
| 699 | client->fd = -1; |
| 700 | return -1; |
| 701 | } |
| 702 | |
| 703 | static int coroutine_fn prh_write_response(PRHelperClient *client, |
| 704 | PRHelperRequest *req, |
| 705 | PRHelperResponse *resp, Error **errp) |
| 706 | { |
| 707 | ssize_t r; |
| 708 | size_t sz; |
| 709 | |
| 710 | if (req->cdb[0] == PERSISTENT_RESERVE_IN && resp->result == GOOD) { |
| 711 | assert(resp->sz <= req->sz && resp->sz <= sizeof(client->data)); |
| 712 | } else { |
| 713 | assert(resp->sz == 0); |
| 714 | } |
| 715 | |
| 716 | sz = resp->sz; |
| 717 | |
| 718 | resp->result = cpu_to_be32(resp->result); |
| 719 | resp->sz = cpu_to_be32(resp->sz); |
| 720 | r = qio_channel_write_all(QIO_CHANNEL(client->ioc), |
| 721 | (char *) resp, sizeof(*resp), errp); |
| 722 | if (r < 0) { |
| 723 | return r; |
| 724 | } |
| 725 | |
| 726 | r = qio_channel_write_all(QIO_CHANNEL(client->ioc), |
| 727 | (char *) client->data, |
| 728 | sz, errp); |
| 729 | return r < 0 ? r : 0; |
| 730 | } |
| 731 | |
| 732 | static void coroutine_fn prh_co_entry(void *opaque) |
| 733 | { |
| 734 | PRHelperClient *client = opaque; |
| 735 | Error *local_err = NULL; |
| 736 | uint32_t flags; |
| 737 | int r; |
| 738 | |
| 739 | qio_channel_set_blocking(QIO_CHANNEL(client->ioc), |
| 740 | false, NULL); |
| 741 | qio_channel_attach_aio_context(QIO_CHANNEL(client->ioc), |
| 742 | qemu_get_aio_context()); |
| 743 | |
| 744 | /* A very simple negotiation for future extensibility. No features |
| 745 | * are defined so write 0. |
| 746 | */ |
| 747 | flags = cpu_to_be32(0); |
| 748 | r = qio_channel_write_all(QIO_CHANNEL(client->ioc), |
| 749 | (char *) &flags, sizeof(flags), NULL); |
| 750 | if (r < 0) { |
| 751 | goto out; |
| 752 | } |
| 753 | |
| 754 | r = qio_channel_read_all(QIO_CHANNEL(client->ioc), |
| 755 | (char *) &flags, sizeof(flags), NULL); |
| 756 | if (be32_to_cpu(flags) != 0 || r < 0) { |
| 757 | goto out; |
| 758 | } |
| 759 | |
Stefan Hajnoczi | d73415a | 2020-09-23 11:56:46 +0100 | [diff] [blame] | 760 | while (qatomic_read(&state) == RUNNING) { |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 761 | PRHelperRequest req; |
| 762 | PRHelperResponse resp; |
| 763 | int sz; |
| 764 | |
| 765 | sz = prh_read_request(client, &req, &resp, &local_err); |
| 766 | if (sz < 0) { |
| 767 | break; |
| 768 | } |
| 769 | |
Paolo Bonzini | ee8c13b | 2018-07-02 14:21:58 +0200 | [diff] [blame] | 770 | num_active_sockets++; |
| 771 | if (req.cdb[0] == PERSISTENT_RESERVE_OUT) { |
| 772 | r = do_pr_out(req.fd, req.cdb, resp.sense, |
| 773 | client->data, sz); |
| 774 | resp.sz = 0; |
| 775 | } else { |
| 776 | resp.sz = sizeof(client->data); |
| 777 | r = do_pr_in(req.fd, req.cdb, resp.sense, |
| 778 | client->data, &resp.sz); |
| 779 | resp.sz = MIN(resp.sz, sz); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 780 | } |
Paolo Bonzini | ee8c13b | 2018-07-02 14:21:58 +0200 | [diff] [blame] | 781 | num_active_sockets--; |
| 782 | close(req.fd); |
| 783 | if (r == -1) { |
| 784 | break; |
| 785 | } |
| 786 | resp.result = r; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 787 | |
| 788 | if (prh_write_response(client, &req, &resp, &local_err) < 0) { |
| 789 | break; |
| 790 | } |
| 791 | } |
| 792 | |
| 793 | if (local_err) { |
| 794 | if (verbose == 0) { |
| 795 | error_free(local_err); |
| 796 | } else { |
| 797 | error_report_err(local_err); |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | out: |
| 802 | qio_channel_detach_aio_context(QIO_CHANNEL(client->ioc)); |
| 803 | object_unref(OBJECT(client->ioc)); |
| 804 | g_free(client); |
| 805 | } |
| 806 | |
| 807 | static gboolean accept_client(QIOChannel *ioc, GIOCondition cond, gpointer opaque) |
| 808 | { |
| 809 | QIOChannelSocket *cioc; |
| 810 | PRHelperClient *prh; |
| 811 | |
| 812 | cioc = qio_channel_socket_accept(QIO_CHANNEL_SOCKET(ioc), |
| 813 | NULL); |
| 814 | if (!cioc) { |
| 815 | return TRUE; |
| 816 | } |
| 817 | |
| 818 | prh = g_new(PRHelperClient, 1); |
| 819 | prh->ioc = cioc; |
| 820 | prh->fd = -1; |
| 821 | prh->co = qemu_coroutine_create(prh_co_entry, prh); |
| 822 | qemu_coroutine_enter(prh->co); |
| 823 | |
| 824 | return TRUE; |
| 825 | } |
| 826 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 827 | static void termsig_handler(int signum) |
| 828 | { |
Stefan Hajnoczi | d73415a | 2020-09-23 11:56:46 +0100 | [diff] [blame] | 829 | qatomic_cmpxchg(&state, RUNNING, TERMINATE); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 830 | qemu_notify_event(); |
| 831 | } |
| 832 | |
| 833 | static void close_server_socket(void) |
| 834 | { |
| 835 | assert(server_ioc); |
| 836 | |
| 837 | g_source_remove(server_watch); |
| 838 | server_watch = -1; |
| 839 | object_unref(OBJECT(server_ioc)); |
| 840 | num_active_sockets--; |
| 841 | } |
| 842 | |
Paolo Bonzini | a358bca | 2019-11-29 11:42:53 +0100 | [diff] [blame] | 843 | #ifdef CONFIG_LIBCAP_NG |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 844 | static int drop_privileges(void) |
| 845 | { |
| 846 | /* clear all capabilities */ |
| 847 | capng_clear(CAPNG_SELECT_BOTH); |
| 848 | |
| 849 | if (capng_update(CAPNG_ADD, CAPNG_EFFECTIVE | CAPNG_PERMITTED, |
| 850 | CAP_SYS_RAWIO) < 0) { |
| 851 | return -1; |
| 852 | } |
| 853 | |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 854 | #ifdef CONFIG_MPATH |
| 855 | /* For /dev/mapper/control ioctls */ |
| 856 | if (capng_update(CAPNG_ADD, CAPNG_EFFECTIVE | CAPNG_PERMITTED, |
| 857 | CAP_SYS_ADMIN) < 0) { |
| 858 | return -1; |
| 859 | } |
| 860 | #endif |
| 861 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 862 | /* Change user/group id, retaining the capabilities. Because file descriptors |
| 863 | * are passed via SCM_RIGHTS, we don't need supplementary groups (and in |
| 864 | * fact the helper can run as "nobody"). |
| 865 | */ |
| 866 | if (capng_change_id(uid != -1 ? uid : getuid(), |
| 867 | gid != -1 ? gid : getgid(), |
| 868 | CAPNG_DROP_SUPP_GRP | CAPNG_CLEAR_BOUNDING)) { |
| 869 | return -1; |
| 870 | } |
| 871 | |
| 872 | return 0; |
| 873 | } |
| 874 | #endif |
| 875 | |
| 876 | int main(int argc, char **argv) |
| 877 | { |
Michal Privoznik | f8e1a98 | 2018-03-24 06:14:49 +0100 | [diff] [blame] | 878 | const char *sopt = "hVk:f:dT:u:g:vq"; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 879 | struct option lopt[] = { |
| 880 | { "help", no_argument, NULL, 'h' }, |
| 881 | { "version", no_argument, NULL, 'V' }, |
| 882 | { "socket", required_argument, NULL, 'k' }, |
Michal Privoznik | f8e1a98 | 2018-03-24 06:14:49 +0100 | [diff] [blame] | 883 | { "pidfile", required_argument, NULL, 'f' }, |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 884 | { "daemon", no_argument, NULL, 'd' }, |
| 885 | { "trace", required_argument, NULL, 'T' }, |
| 886 | { "user", required_argument, NULL, 'u' }, |
| 887 | { "group", required_argument, NULL, 'g' }, |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 888 | { "verbose", no_argument, NULL, 'v' }, |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 889 | { "quiet", no_argument, NULL, 'q' }, |
| 890 | { NULL, 0, NULL, 0 } |
| 891 | }; |
| 892 | int opt_ind = 0; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 893 | int loglevel = 1; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 894 | int quiet = 0; |
| 895 | int ch; |
| 896 | Error *local_err = NULL; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 897 | bool daemonize = false; |
Michal Privoznik | bd6b1c8 | 2018-04-03 15:12:15 +0200 | [diff] [blame] | 898 | bool pidfile_specified = false; |
Michal Privoznik | 2729d79 | 2018-07-03 11:51:14 +0200 | [diff] [blame] | 899 | bool socket_path_specified = false; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 900 | unsigned socket_activation; |
| 901 | |
| 902 | struct sigaction sa_sigterm; |
| 903 | memset(&sa_sigterm, 0, sizeof(sa_sigterm)); |
| 904 | sa_sigterm.sa_handler = termsig_handler; |
| 905 | sigaction(SIGTERM, &sa_sigterm, NULL); |
| 906 | sigaction(SIGINT, &sa_sigterm, NULL); |
| 907 | sigaction(SIGHUP, &sa_sigterm, NULL); |
| 908 | |
| 909 | signal(SIGPIPE, SIG_IGN); |
| 910 | |
Christophe Fergeau | f5852ef | 2019-01-31 17:46:14 +0100 | [diff] [blame] | 911 | error_init(argv[0]); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 912 | module_call_init(MODULE_INIT_TRACE); |
| 913 | module_call_init(MODULE_INIT_QOM); |
| 914 | qemu_add_opts(&qemu_trace_opts); |
| 915 | qemu_init_exec_dir(argv[0]); |
| 916 | |
Michal Privoznik | 2729d79 | 2018-07-03 11:51:14 +0200 | [diff] [blame] | 917 | compute_default_paths(); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 918 | |
| 919 | while ((ch = getopt_long(argc, argv, sopt, lopt, &opt_ind)) != -1) { |
| 920 | switch (ch) { |
| 921 | case 'k': |
Michal Privoznik | 2729d79 | 2018-07-03 11:51:14 +0200 | [diff] [blame] | 922 | g_free(socket_path); |
| 923 | socket_path = g_strdup(optarg); |
| 924 | socket_path_specified = true; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 925 | if (socket_path[0] != '/') { |
| 926 | error_report("socket path must be absolute"); |
| 927 | exit(EXIT_FAILURE); |
| 928 | } |
| 929 | break; |
| 930 | case 'f': |
Michal Privoznik | f8e1a98 | 2018-03-24 06:14:49 +0100 | [diff] [blame] | 931 | g_free(pidfile); |
| 932 | pidfile = g_strdup(optarg); |
Michal Privoznik | bd6b1c8 | 2018-04-03 15:12:15 +0200 | [diff] [blame] | 933 | pidfile_specified = true; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 934 | break; |
Paolo Bonzini | a358bca | 2019-11-29 11:42:53 +0100 | [diff] [blame] | 935 | #ifdef CONFIG_LIBCAP_NG |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 936 | case 'u': { |
| 937 | unsigned long res; |
| 938 | struct passwd *userinfo = getpwnam(optarg); |
| 939 | if (userinfo) { |
| 940 | uid = userinfo->pw_uid; |
| 941 | } else if (qemu_strtoul(optarg, NULL, 10, &res) == 0 && |
| 942 | (uid_t)res == res) { |
| 943 | uid = res; |
| 944 | } else { |
| 945 | error_report("invalid user '%s'", optarg); |
| 946 | exit(EXIT_FAILURE); |
| 947 | } |
| 948 | break; |
| 949 | } |
| 950 | case 'g': { |
| 951 | unsigned long res; |
| 952 | struct group *groupinfo = getgrnam(optarg); |
| 953 | if (groupinfo) { |
| 954 | gid = groupinfo->gr_gid; |
| 955 | } else if (qemu_strtoul(optarg, NULL, 10, &res) == 0 && |
| 956 | (gid_t)res == res) { |
| 957 | gid = res; |
| 958 | } else { |
| 959 | error_report("invalid group '%s'", optarg); |
| 960 | exit(EXIT_FAILURE); |
| 961 | } |
| 962 | break; |
| 963 | } |
| 964 | #else |
| 965 | case 'u': |
| 966 | case 'g': |
| 967 | error_report("-%c not supported by this %s", ch, argv[0]); |
| 968 | exit(1); |
| 969 | #endif |
| 970 | case 'd': |
| 971 | daemonize = true; |
| 972 | break; |
| 973 | case 'q': |
| 974 | quiet = 1; |
| 975 | break; |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 976 | case 'v': |
| 977 | ++loglevel; |
| 978 | break; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 979 | case 'T': |
Paolo Bonzini | 92eecff | 2020-11-02 06:58:41 -0500 | [diff] [blame] | 980 | trace_opt_parse(optarg); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 981 | break; |
| 982 | case 'V': |
| 983 | version(argv[0]); |
| 984 | exit(EXIT_SUCCESS); |
| 985 | break; |
| 986 | case 'h': |
| 987 | usage(argv[0]); |
| 988 | exit(EXIT_SUCCESS); |
| 989 | break; |
| 990 | case '?': |
| 991 | error_report("Try `%s --help' for more information.", argv[0]); |
| 992 | exit(EXIT_FAILURE); |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | /* set verbosity */ |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 997 | noisy = !quiet && (loglevel >= 3); |
| 998 | verbose = quiet ? 0 : MIN(loglevel, 3); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 999 | |
| 1000 | if (!trace_init_backends()) { |
| 1001 | exit(EXIT_FAILURE); |
| 1002 | } |
Paolo Bonzini | 92eecff | 2020-11-02 06:58:41 -0500 | [diff] [blame] | 1003 | trace_init_file(); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1004 | qemu_set_log(LOG_TRACE); |
| 1005 | |
Paolo Bonzini | fe8fc5a | 2017-08-22 06:50:55 +0200 | [diff] [blame] | 1006 | #ifdef CONFIG_MPATH |
| 1007 | dm_init(); |
| 1008 | multipath_pr_init(); |
| 1009 | #endif |
| 1010 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1011 | socket_activation = check_socket_activation(); |
| 1012 | if (socket_activation == 0) { |
| 1013 | SocketAddress saddr; |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1014 | saddr = (SocketAddress){ |
| 1015 | .type = SOCKET_ADDRESS_TYPE_UNIX, |
Michal Privoznik | 2729d79 | 2018-07-03 11:51:14 +0200 | [diff] [blame] | 1016 | .u.q_unix.path = socket_path, |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1017 | }; |
| 1018 | server_ioc = qio_channel_socket_new(); |
Juan Quintela | 4e2d8bf | 2019-08-19 15:29:58 +0200 | [diff] [blame] | 1019 | if (qio_channel_socket_listen_sync(server_ioc, &saddr, |
| 1020 | 1, &local_err) < 0) { |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1021 | object_unref(OBJECT(server_ioc)); |
| 1022 | error_report_err(local_err); |
| 1023 | return 1; |
| 1024 | } |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1025 | } else { |
| 1026 | /* Using socket activation - check user didn't use -p etc. */ |
Michal Privoznik | 2729d79 | 2018-07-03 11:51:14 +0200 | [diff] [blame] | 1027 | if (socket_path_specified) { |
| 1028 | error_report("Unix socket can't be set when using socket activation"); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1029 | exit(EXIT_FAILURE); |
| 1030 | } |
| 1031 | |
| 1032 | /* Can only listen on a single socket. */ |
| 1033 | if (socket_activation > 1) { |
| 1034 | error_report("%s does not support socket activation with LISTEN_FDS > 1", |
| 1035 | argv[0]); |
| 1036 | exit(EXIT_FAILURE); |
| 1037 | } |
| 1038 | server_ioc = qio_channel_socket_new_fd(FIRST_SOCKET_ACTIVATION_FD, |
| 1039 | &local_err); |
| 1040 | if (server_ioc == NULL) { |
Markus Armbruster | 5217f18 | 2020-05-05 12:19:03 +0200 | [diff] [blame] | 1041 | error_reportf_err(local_err, |
| 1042 | "Failed to use socket activation: "); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1043 | exit(EXIT_FAILURE); |
| 1044 | } |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1045 | } |
| 1046 | |
Markus Armbruster | f9734d5 | 2021-07-20 14:53:53 +0200 | [diff] [blame] | 1047 | qemu_init_main_loop(&error_fatal); |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1048 | |
| 1049 | server_watch = qio_channel_add_watch(QIO_CHANNEL(server_ioc), |
| 1050 | G_IO_IN, |
| 1051 | accept_client, |
| 1052 | NULL, NULL); |
| 1053 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1054 | if (daemonize) { |
| 1055 | if (daemon(0, 0) < 0) { |
| 1056 | error_report("Failed to daemonize: %s", strerror(errno)); |
| 1057 | exit(EXIT_FAILURE); |
| 1058 | } |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1059 | } |
| 1060 | |
Markus Armbruster | f9734d5 | 2021-07-20 14:53:53 +0200 | [diff] [blame] | 1061 | if (daemonize || pidfile_specified) { |
| 1062 | qemu_write_pidfile(pidfile, &error_fatal); |
Marc-André Lureau | 9e6bdef | 2018-08-31 16:53:12 +0200 | [diff] [blame] | 1063 | } |
Michal Privoznik | bd6b1c8 | 2018-04-03 15:12:15 +0200 | [diff] [blame] | 1064 | |
Paolo Bonzini | a358bca | 2019-11-29 11:42:53 +0100 | [diff] [blame] | 1065 | #ifdef CONFIG_LIBCAP_NG |
Michal Privoznik | 8dc0bf2 | 2018-04-03 15:12:14 +0200 | [diff] [blame] | 1066 | if (drop_privileges() < 0) { |
| 1067 | error_report("Failed to drop privileges: %s", strerror(errno)); |
| 1068 | exit(EXIT_FAILURE); |
| 1069 | } |
| 1070 | #endif |
| 1071 | |
Paolo Bonzini | b855f8d | 2017-08-22 06:50:18 +0200 | [diff] [blame] | 1072 | state = RUNNING; |
| 1073 | do { |
| 1074 | main_loop_wait(false); |
| 1075 | if (state == TERMINATE) { |
| 1076 | state = TERMINATING; |
| 1077 | close_server_socket(); |
| 1078 | } |
| 1079 | } while (num_active_sockets > 0); |
| 1080 | |
| 1081 | exit(EXIT_SUCCESS); |
| 1082 | } |