1 /* 2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2011 by Delphix. All rights reserved. 4 */ 5 6 /* 7 * BSD 3 Clause License 8 * 9 * Copyright (c) 2007, The Storage Networking Industry Association. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * - Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 17 * - Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in 19 * the documentation and/or other materials provided with the 20 * distribution. 21 * 22 * - Neither the name of The Storage Networking Industry Association (SNIA) 23 * nor the names of its contributors may be used to endorse or promote 24 * products derived from this software without specific prior written 25 * permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 28 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 31 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 /* Copyright (c) 2007, The Storage Networking Industry Association. */ 40 /* Copyright (c) 1996, 1997 PDC, Network Appliance. All Rights Reserved */ 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/lwp.h> 45 #include <sys/fs/zfs.h> 46 #include <sys/mtio.h> 47 #include <sys/time.h> 48 #include <unistd.h> 49 #include <errno.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <ctype.h> 53 #include <libzfs.h> 54 #include <stdio.h> 55 #include "ndmpd_common.h" 56 #include "ndmpd.h" 57 58 typedef struct { 59 char nzs_findprop[ZFS_MAXPROPLEN]; /* prop substring to find */ 60 char nzs_snapname[ZFS_MAXNAMELEN]; /* snap's name */ 61 char nzs_snapprop[ZFS_MAXPROPLEN]; /* snap's prop value */ 62 char nzs_snapskip[ZFS_MAXPROPLEN]; /* snap to skip */ 63 uint32_t nzs_prop_major; /* property major version */ 64 uint32_t nzs_prop_minor; /* property minor version */ 65 } ndmpd_zfs_snapfind_t; 66 67 mutex_t ndmpd_zfs_fd_lock; 68 69 static int ndmpd_zfs_open_fds(ndmpd_zfs_args_t *); 70 static void ndmpd_zfs_close_fds(ndmpd_zfs_args_t *); 71 72 static void ndmpd_zfs_close_one_fd(ndmpd_zfs_args_t *, int); 73 74 static int ndmpd_zfs_header_write(ndmpd_session_t *); 75 static int ndmpd_zfs_header_read(ndmpd_zfs_args_t *); 76 77 static int ndmpd_zfs_backup_send_read(ndmpd_zfs_args_t *); 78 static int ndmpd_zfs_backup_tape_write(ndmpd_zfs_args_t *); 79 80 static int ndmpd_zfs_restore(ndmpd_zfs_args_t *); 81 static int ndmpd_zfs_restore_tape_read(ndmpd_zfs_args_t *); 82 static int ndmpd_zfs_restore_recv_write(ndmpd_zfs_args_t *); 83 84 static int ndmpd_zfs_reader_writer(ndmpd_zfs_args_t *, int **, int **); 85 86 static int ndmpd_zfs_addenv_backup_size(ndmpd_zfs_args_t *, u_longlong_t); 87 88 static boolean_t ndmpd_zfs_backup_pathvalid(ndmpd_zfs_args_t *); 89 static int ndmpd_zfs_backup_getpath(ndmpd_zfs_args_t *, char *, int); 90 static int ndmpd_zfs_backup_getenv(ndmpd_zfs_args_t *); 91 92 static boolean_t ndmpd_zfs_restore_pathvalid(ndmpd_zfs_args_t *); 93 static int ndmpd_zfs_restore_getpath(ndmpd_zfs_args_t *); 94 static int ndmpd_zfs_restore_getenv(ndmpd_zfs_args_t *); 95 96 static int ndmpd_zfs_getenv(ndmpd_zfs_args_t *); 97 static int ndmpd_zfs_getenv_zfs_mode(ndmpd_zfs_args_t *); 98 static int ndmpd_zfs_getenv_zfs_force(ndmpd_zfs_args_t *); 99 static int ndmpd_zfs_getenv_level(ndmpd_zfs_args_t *); 100 static int ndmpd_zfs_getenv_update(ndmpd_zfs_args_t *); 101 static int ndmpd_zfs_getenv_dmp_name(ndmpd_zfs_args_t *); 102 static int ndmpd_zfs_getenv_zfs_backup_size(ndmpd_zfs_args_t *); 103 104 static boolean_t ndmpd_zfs_dmp_name_valid(ndmpd_zfs_args_t *, char *); 105 static boolean_t ndmpd_zfs_is_incremental(ndmpd_zfs_args_t *); 106 static int ndmpd_zfs_send_fhist(ndmpd_zfs_args_t *); 107 108 static int ndmpd_zfs_snapshot_prepare(ndmpd_zfs_args_t *); 109 static int ndmpd_zfs_snapshot_cleanup(ndmpd_zfs_args_t *, int); 110 static int ndmpd_zfs_snapshot_create(ndmpd_zfs_args_t *); 111 static int ndmpd_zfs_snapshot_unuse(ndmpd_zfs_args_t *, 112 boolean_t, ndmpd_zfs_snapfind_t *); 113 static boolean_t ndmpd_zfs_snapshot_ndmpd_generated(char *); 114 static int ndmpd_zfs_snapshot_find(ndmpd_zfs_args_t *, ndmpd_zfs_snapfind_t *); 115 116 static int ndmpd_zfs_snapshot_prop_find(zfs_handle_t *, void *); 117 static int ndmpd_zfs_snapshot_prop_get(zfs_handle_t *, char *); 118 static int ndmpd_zfs_snapshot_prop_add(ndmpd_zfs_args_t *); 119 static int ndmpd_zfs_snapshot_prop_create(ndmpd_zfs_args_t *, char *, 120 boolean_t *); 121 static int ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args_t *, char *, int, 122 boolean_t); 123 static int ndmpd_zfs_snapshot_prop_remove(ndmpd_zfs_args_t *, 124 ndmpd_zfs_snapfind_t *); 125 static boolean_t ndmpd_zfs_prop_version_check(char *, uint32_t *, uint32_t *); 126 127 static int ndmpd_zfs_snapname_create(ndmpd_zfs_args_t *, char *, int); 128 129 static void ndmpd_zfs_zerr_dma_log(ndmpd_zfs_args_t *); 130 131 static int ndmpd_zfs_backup(ndmpd_zfs_args_t *); 132 133 /* 134 * Syntax for com.sun.ndmp:incr property value: 135 * #.#.n|u/$LEVEL.$DMP_NAME.$ZFS_MODE(/ ...) 136 * 137 * where 138 * #.# is the version number 139 * 'n' means ndmp-generated; 'u' means user-supplied 140 * $LEVEL: backup (incremental) level [0-9] 141 * $DMP_NAME: set name [default: "level"] 142 * $ZFS_MODE: d | r | p [for dataset, recursive, or package] 143 * 144 * Examples: 145 * 146 * 0.0.n/0.bob.p 147 * 0.0.u/1.bob.p/0.jane.d 148 * 149 * Note: NDMPD_ZFS_SUBPROP_MAX is calculated based on ZFS_MAXPROPLEN 150 */ 151 152 #define NDMPD_ZFS_PROP_INCR "com.sun.ndmp:incr" 153 #define NDMPD_ZFS_SUBPROP_MAX 28 154 155 /* 156 * NDMPD_ZFS_LOG_ZERR 157 * 158 * As coded, there should be no races in the retrieval of the ZFS errno 159 * from the ndmpd_zfs_args->nz_zlibh. I.e., for a given ndmpd_zfs backup 160 * or restore, there should only ever be one ZFS library call taking place 161 * at any one moment in time. 162 */ 163 164 #define NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, ...) { \ 165 NDMP_LOG(LOG_ERR, __VA_ARGS__); \ 166 NDMP_LOG(LOG_ERR, "%s--%s", \ 167 libzfs_error_action((ndmpd_zfs_args)->nz_zlibh), \ 168 libzfs_error_description((ndmpd_zfs_args)->nz_zlibh)); \ 169 ndmpd_zfs_zerr_dma_log((ndmpd_zfs_args)); \ 170 } 171 172 int 173 ndmpd_zfs_init(ndmpd_session_t *session) 174 { 175 ndmpd_zfs_args_t *ndmpd_zfs_args = &session->ns_ndmpd_zfs_args; 176 int version = session->ns_protocol_version; 177 178 bzero(ndmpd_zfs_args, sizeof (*ndmpd_zfs_args)); 179 180 if ((version < NDMPV3) || (version > NDMPV4)) { 181 NDMP_LOG(LOG_ERR, "Unknown or unsupported version %d", version); 182 return (-1); 183 } 184 185 if ((ndmpd_zfs_args->nz_zlibh = libzfs_init()) == NULL) { 186 NDMP_LOG(LOG_ERR, "libzfs init error [%d]", errno); 187 return (-1); 188 } 189 190 if (ndmpd_zfs_open_fds(ndmpd_zfs_args) < 0) { 191 NDMP_LOG(LOG_ERR, "open_fds() failure(): %d\n", errno); 192 return (-1); 193 } 194 195 ndmpd_zfs_args->nz_bufsize = ndmp_buffer_get_size(session); 196 ndmpd_zfs_args->nz_window_len = session->ns_mover.md_window_length; 197 198 ndmpd_zfs_args->nz_nlp = ndmp_get_nlp(session); 199 200 assert(ndmpd_zfs_args->nz_nlp != NULL); 201 202 ndmpd_zfs_args->nz_nlp->nlp_bytes_total = 0; 203 204 session->ns_data.dd_module.dm_module_cookie = ndmpd_zfs_args; 205 session->ns_data.dd_data_size = 0; 206 session->ns_data.dd_module.dm_stats.ms_est_bytes_remaining = 0; 207 session->ns_data.dd_module.dm_stats.ms_est_time_remaining = 0; 208 209 session->ns_data.dd_bytes_left_to_read = 0; 210 session->ns_data.dd_position = 0; 211 session->ns_data.dd_discard_length = 0; 212 session->ns_data.dd_read_offset = 0; 213 session->ns_data.dd_read_length = 0; 214 215 ndmpd_zfs_params->mp_get_env_func = ndmpd_api_get_env; 216 ndmpd_zfs_params->mp_add_env_func = ndmpd_api_add_env; 217 ndmpd_zfs_params->mp_set_env_func = ndmpd_api_set_env; 218 ndmpd_zfs_params->mp_dispatch_func = ndmpd_api_dispatch; 219 ndmpd_zfs_params->mp_daemon_cookie = (void *)session; 220 ndmpd_zfs_params->mp_protocol_version = session->ns_protocol_version; 221 ndmpd_zfs_params->mp_stats = &session->ns_data.dd_module.dm_stats; 222 ndmpd_zfs_params->mp_add_file_handler_func = 223 ndmpd_api_add_file_handler; 224 ndmpd_zfs_params->mp_remove_file_handler_func = 225 ndmpd_api_remove_file_handler; 226 ndmpd_zfs_params->mp_seek_func = 0; 227 228 switch (version) { 229 case NDMPV3: 230 ndmpd_zfs_params->mp_write_func = ndmpd_api_write_v3; 231 ndmpd_zfs_params->mp_read_func = ndmpd_api_read_v3; 232 ndmpd_zfs_params->mp_get_name_func = ndmpd_api_get_name_v3; 233 ndmpd_zfs_params->mp_done_func = ndmpd_api_done_v3; 234 ndmpd_zfs_params->mp_log_func_v3 = ndmpd_api_log_v3; 235 ndmpd_zfs_params->mp_file_recovered_func = 236 ndmpd_api_file_recovered_v3; 237 break; 238 case NDMPV4: 239 ndmpd_zfs_params->mp_write_func = ndmpd_api_write_v3; 240 ndmpd_zfs_params->mp_read_func = ndmpd_api_read_v3; 241 ndmpd_zfs_params->mp_get_name_func = ndmpd_api_get_name_v3; 242 ndmpd_zfs_params->mp_done_func = ndmpd_api_done_v3; 243 ndmpd_zfs_params->mp_log_func_v3 = ndmpd_api_log_v4; 244 ndmpd_zfs_params->mp_file_recovered_func = 245 ndmpd_api_file_recovered_v4; 246 break; 247 default: 248 /* error already returned above for this case */ 249 break; 250 } 251 252 return (0); 253 } 254 255 void 256 ndmpd_zfs_fini(ndmpd_zfs_args_t *ndmpd_zfs_args) 257 { 258 libzfs_fini(ndmpd_zfs_args->nz_zlibh); 259 260 ndmpd_zfs_close_fds(ndmpd_zfs_args); 261 } 262 263 static int 264 ndmpd_zfs_open_fds(ndmpd_zfs_args_t *ndmpd_zfs_args) 265 { 266 int err; 267 268 err = pipe(ndmpd_zfs_args->nz_pipe_fd); 269 if (err) 270 NDMP_LOG(LOG_ERR, "pipe(2) failed: %s:\n", strerror(errno)); 271 272 return (err); 273 } 274 275 /* 276 * ndmpd_zfs_close_fds() 277 * 278 * In the abort case, use dup2() to redirect the end of the pipe that is 279 * being written to (to a new pipe). Close the ends of the new pipe to cause 280 * EPIPE to be returned to the writing thread. This will cause the writer 281 * and reader to terminate without having any of the writer's data erroneously 282 * go to any reopened descriptor. 283 */ 284 285 static void 286 ndmpd_zfs_close_fds(ndmpd_zfs_args_t *ndmpd_zfs_args) 287 { 288 ndmpd_session_t *session = (ndmpd_session_t *) 289 (ndmpd_zfs_params->mp_daemon_cookie); 290 int pipe_end; 291 int fds[2]; 292 293 if (session->ns_data.dd_state != NDMP_DATA_STATE_ACTIVE) { 294 ndmpd_zfs_close_one_fd(ndmpd_zfs_args, PIPE_ZFS); 295 ndmpd_zfs_close_one_fd(ndmpd_zfs_args, PIPE_TAPE); 296 return; 297 } 298 299 (void) mutex_lock(&ndmpd_zfs_fd_lock); 300 301 if (ndmpd_zfs_params->mp_operation == NDMP_DATA_OP_BACKUP) { 302 pipe_end = PIPE_ZFS; 303 } else { 304 pipe_end = PIPE_TAPE; 305 } 306 307 if (ndmpd_zfs_args->nz_pipe_fd[pipe_end] != -1) { 308 if (pipe(fds) != 0) { 309 (void) mutex_unlock(&ndmpd_zfs_fd_lock); 310 NDMP_LOG(LOG_ERR, "pipe(2) failed: %s:\n", 311 strerror(errno)); 312 return; 313 } 314 315 (void) dup2(fds[0], ndmpd_zfs_args->nz_pipe_fd[pipe_end]); 316 (void) close(fds[0]); 317 (void) close(fds[1]); 318 319 ndmpd_zfs_args->nz_pipe_fd[pipe_end] = -1; 320 } 321 322 (void) mutex_unlock(&ndmpd_zfs_fd_lock); 323 } 324 325 static void 326 ndmpd_zfs_close_one_fd(ndmpd_zfs_args_t *ndmpd_zfs_args, int pipe_end) 327 { 328 (void) mutex_lock(&ndmpd_zfs_fd_lock); 329 (void) close(ndmpd_zfs_args->nz_pipe_fd[pipe_end]); 330 ndmpd_zfs_args->nz_pipe_fd[pipe_end] = -1; 331 (void) mutex_unlock(&ndmpd_zfs_fd_lock); 332 } 333 334 static int 335 ndmpd_zfs_header_write(ndmpd_session_t *session) 336 { 337 ndmpd_zfs_args_t *ndmpd_zfs_args = &session->ns_ndmpd_zfs_args; 338 int32_t bufsize = ndmpd_zfs_args->nz_bufsize; 339 ndmpd_zfs_header_t *tape_header = &ndmpd_zfs_args->nz_tape_header; 340 char *buf; 341 342 buf = ndmp_malloc(bufsize); 343 if (buf == NULL) { 344 NDMP_LOG(LOG_DEBUG, "buf NULL"); 345 return (-1); 346 } 347 348 (void) strlcpy(tape_header->nzh_magic, NDMPUTF8MAGIC, 349 sizeof (NDMPUTF8MAGIC)); 350 tape_header->nzh_major = LE_32(NDMPD_ZFS_MAJOR_VERSION); 351 tape_header->nzh_minor = LE_32(NDMPD_ZFS_MINOR_VERSION); 352 tape_header->nzh_hdrlen = LE_32(bufsize); 353 354 bzero(buf, bufsize); 355 (void) memcpy(buf, tape_header, sizeof (ndmpd_zfs_header_t)); 356 357 NDMP_LOG(LOG_DEBUG, "header (major, minor, length): %u %u %u", 358 NDMPD_ZFS_MAJOR_VERSION, 359 NDMPD_ZFS_MINOR_VERSION, 360 bufsize); 361 362 if (MOD_WRITE(ndmpd_zfs_params, buf, bufsize) != 0) { 363 free(buf); 364 NDMP_LOG(LOG_ERR, "MOD_WRITE error"); 365 return (-1); 366 } 367 368 free(buf); 369 370 session->ns_data.dd_module.dm_stats.ms_bytes_processed = bufsize; 371 372 return (0); 373 } 374 375 static int 376 ndmpd_zfs_header_read(ndmpd_zfs_args_t *ndmpd_zfs_args) 377 { 378 int32_t bufsize = ndmpd_zfs_args->nz_bufsize; 379 ndmpd_zfs_header_t *tape_header = &ndmpd_zfs_args->nz_tape_header; 380 uint32_t hdrlen; 381 int32_t header_left; 382 int err; 383 char *buf; 384 385 buf = ndmp_malloc(bufsize); 386 if (buf == NULL) { 387 NDMP_LOG(LOG_DEBUG, "buf NULL"); 388 return (-1); 389 } 390 391 bzero(buf, bufsize); 392 393 /* 394 * Read nz_bufsize worth of bytes first (the size of a mover record). 395 */ 396 397 err = MOD_READ(ndmpd_zfs_params, buf, bufsize); 398 399 if (err != 0) { 400 NDMP_LOG(LOG_ERR, "MOD_READ error: %d", err); 401 free(buf); 402 return (-1); 403 } 404 405 (void) memcpy(tape_header, buf, sizeof (ndmpd_zfs_header_t)); 406 407 if (strcmp(tape_header->nzh_magic, NDMPUTF8MAGIC) != 0) { 408 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 409 "bad magic string\n"); 410 goto _err; 411 } 412 413 if (tape_header->nzh_major > LE_32(NDMPD_ZFS_MAJOR_VERSION)) { 414 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 415 "major number larger than supported: (%d %d)\n", 416 LE_32(tape_header->nzh_major), NDMPD_ZFS_MAJOR_VERSION); 417 goto _err; 418 } 419 420 /* 421 * Major version 0 (regardless of minor version): 422 * Header must be a multiple of the mover record size. 423 */ 424 425 hdrlen = LE_32(tape_header->nzh_hdrlen); 426 if (hdrlen > bufsize) { 427 header_left = hdrlen - bufsize; 428 while (header_left > 0) { 429 err = MOD_READ(ndmpd_zfs_params, buf, bufsize); 430 if (err == -1) { 431 ndmpd_zfs_dma_log(ndmpd_zfs_args, 432 NDMP_LOG_ERROR, "bad header\n"); 433 goto _err; 434 } 435 header_left -= bufsize; 436 } 437 } 438 439 NDMP_LOG(LOG_DEBUG, "tape header: %s; %u %u; %u ", 440 tape_header->nzh_magic, 441 LE_32(tape_header->nzh_major), 442 LE_32(tape_header->nzh_minor), 443 LE_32(tape_header->nzh_hdrlen)); 444 445 ndmpd_zfs_args->nz_nlp->nlp_bytes_total = hdrlen; 446 447 free(buf); 448 return (0); 449 450 _err: 451 452 NDMP_LOG(LOG_ERR, "tape header: %s; %u %u; %u ", 453 tape_header->nzh_magic, 454 LE_32(tape_header->nzh_major), 455 LE_32(tape_header->nzh_minor), 456 LE_32(tape_header->nzh_hdrlen)); 457 458 free(buf); 459 return (-1); 460 } 461 462 int 463 ndmpd_zfs_backup_starter(void *arg) 464 { 465 ndmpd_zfs_args_t *ndmpd_zfs_args = arg; 466 ndmpd_session_t *session = (ndmpd_session_t *) 467 (ndmpd_zfs_params->mp_daemon_cookie); 468 int cleanup_err = 0; 469 int err = 0; 470 471 ndmp_session_ref(session); 472 473 if (ndmpd_zfs_snapshot_prepare(ndmpd_zfs_args) != 0) { 474 err = -1; 475 goto _done; 476 } 477 478 err = ndmpd_zfs_backup(ndmpd_zfs_args); 479 480 cleanup_err = ndmpd_zfs_snapshot_cleanup(ndmpd_zfs_args, err); 481 482 NDMP_LOG(LOG_DEBUG, 483 "data bytes_total(including header):%llu", 484 session->ns_data.dd_module.dm_stats.ms_bytes_processed); 485 486 if (err == 0) 487 err = ndmpd_zfs_send_fhist(ndmpd_zfs_args); 488 489 _done: 490 NS_DEC(nbk); 491 MOD_DONE(ndmpd_zfs_params, err ? err : cleanup_err); 492 ndmp_session_unref(session); 493 ndmpd_zfs_fini(ndmpd_zfs_args); 494 495 return (err); 496 } 497 498 static int 499 ndmpd_zfs_send_fhist(ndmpd_zfs_args_t *ndmpd_zfs_args) 500 { 501 ndmpd_session_t *session = (ndmpd_session_t *) 502 (ndmpd_zfs_params->mp_daemon_cookie); 503 struct stat64 st; 504 char *envp; 505 506 envp = MOD_GETENV(ndmpd_zfs_params, "HIST"); 507 if (!envp) 508 return (0); 509 510 if (!(strchr("YT", toupper(*envp)))) { 511 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_WARNING, 512 "HIST is not set. No file history will be " 513 "generated.\n"); 514 return (0); 515 } 516 517 /* Build up a sample root dir stat */ 518 (void) memset(&st, 0, sizeof (struct stat64)); 519 st.st_mode = S_IFDIR | 0777; 520 st.st_mtime = st.st_atime = st.st_ctime = time(NULL); 521 st.st_uid = st.st_gid = 0; 522 st.st_size = 1; 523 st.st_nlink = 1; 524 525 if (ndmpd_api_file_history_dir_v3(session, ".", ROOT_INODE, 526 ROOT_INODE) != 0) 527 return (-1); 528 if (ndmpd_api_file_history_dir_v3(session, "..", ROOT_INODE, 529 ROOT_INODE) != 0) 530 return (-1); 531 if (ndmpd_api_file_history_node_v3(session, ROOT_INODE, &st, 0) != 0) 532 return (-1); 533 534 ndmpd_file_history_cleanup(session, TRUE); 535 return (0); 536 } 537 538 static int 539 ndmpd_zfs_backup(ndmpd_zfs_args_t *ndmpd_zfs_args) 540 { 541 ndmpd_session_t *session = (ndmpd_session_t *) 542 (ndmpd_zfs_params->mp_daemon_cookie); 543 int *read_err = NULL; 544 int *write_err = NULL; 545 int result = 0; 546 int err; 547 548 if (session->ns_eof) 549 return (-1); 550 551 if (!session->ns_data.dd_abort) { 552 if (ndmpd_zfs_header_write(session)) { 553 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 554 "ndmpd_zfs header write error\n"); 555 return (-1); 556 } 557 558 err = ndmpd_zfs_reader_writer(ndmpd_zfs_args, 559 &read_err, &write_err); 560 561 if (err || read_err || write_err || session->ns_eof) 562 result = EPIPE; 563 } 564 565 if (session->ns_data.dd_abort) { 566 ndmpd_audit_backup(session->ns_connection, 567 ndmpd_zfs_args->nz_dataset, 568 session->ns_data.dd_data_addr.addr_type, 569 ndmpd_zfs_args->nz_dataset, EINTR); 570 NDMP_LOG(LOG_DEBUG, "Backing up \"%s\" aborted.", 571 ndmpd_zfs_args->nz_dataset); 572 573 (void) ndmpd_zfs_post_backup(ndmpd_zfs_args); 574 err = -1; 575 } else { 576 ndmpd_audit_backup(session->ns_connection, 577 ndmpd_zfs_args->nz_dataset, 578 session->ns_data.dd_data_addr.addr_type, 579 ndmpd_zfs_args->nz_dataset, result); 580 581 err = ndmpd_zfs_post_backup(ndmpd_zfs_args); 582 if (err || result) 583 err = -1; 584 585 if (err == 0) { 586 NDMP_LOG(LOG_DEBUG, "Backing up \"%s\" finished.", 587 ndmpd_zfs_args->nz_dataset); 588 } else { 589 NDMP_LOG(LOG_DEBUG, "An error occurred while backing up" 590 " \"%s\"", ndmpd_zfs_args->nz_dataset); 591 } 592 } 593 594 return (err); 595 } 596 597 /* 598 * ndmpd_zfs_backup_send_read() 599 * 600 * This routine executes zfs_send() to create the backup data stream. 601 * The value of ZFS_MODE determines the type of zfs_send(): 602 * dataset ('d'): Only the dataset specified (i.e., top level) is backed up 603 * recursive ('r'): The dataset and its child file systems are backed up 604 * package ('p'): Same as 'r', except all intermediate snapshots are also 605 * backed up 606 * 607 * Volumes do not have descednants, so 'd' and 'r' produce equivalent results. 608 */ 609 610 static int 611 ndmpd_zfs_backup_send_read(ndmpd_zfs_args_t *ndmpd_zfs_args) 612 { 613 ndmpd_session_t *session = (ndmpd_session_t *) 614 (ndmpd_zfs_params->mp_daemon_cookie); 615 sendflags_t flags = { 0 }; 616 char *fromsnap = NULL; 617 zfs_handle_t *zhp; 618 int err; 619 620 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, 621 ndmpd_zfs_args->nz_dataset, ndmpd_zfs_args->nz_type); 622 623 if (!zhp) { 624 if (!session->ns_data.dd_abort) 625 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_open"); 626 return (-1); 627 } 628 629 switch (ndmpd_zfs_args->nz_zfs_mode) { 630 case ('d'): 631 flags.props = B_TRUE; 632 break; 633 case ('r'): 634 flags.replicate = B_TRUE; 635 break; 636 case ('p'): 637 flags.doall = B_TRUE; 638 flags.replicate = B_TRUE; 639 break; 640 default: 641 NDMP_LOG(LOG_ERR, "unknown zfs_mode: %c", 642 ndmpd_zfs_args->nz_zfs_mode); 643 zfs_close(zhp); 644 return (-1); 645 } 646 647 if (ndmpd_zfs_is_incremental(ndmpd_zfs_args)) { 648 if (ndmpd_zfs_args->nz_fromsnap[0] == '\0') { 649 NDMP_LOG(LOG_ERR, "no fromsnap"); 650 zfs_close(zhp); 651 return (-1); 652 } 653 fromsnap = ndmpd_zfs_args->nz_fromsnap; 654 } 655 656 err = zfs_send(zhp, fromsnap, ndmpd_zfs_args->nz_snapname, &flags, 657 ndmpd_zfs_args->nz_pipe_fd[PIPE_ZFS], NULL, NULL, NULL); 658 659 if (err && !session->ns_data.dd_abort) 660 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_send: %d", err); 661 662 zfs_close(zhp); 663 664 return (err); 665 } 666 667 /* 668 * ndmpd_zfs_backup_tape_write() 669 * 670 * The data begins on a mover record boundary (because 671 * the header is the size of a mover record--i.e. 672 * ndmpd_zfs_args->nz_bufsize). 673 */ 674 675 static int 676 ndmpd_zfs_backup_tape_write(ndmpd_zfs_args_t *ndmpd_zfs_args) 677 { 678 ndmpd_session_t *session = (ndmpd_session_t *) 679 (ndmpd_zfs_params->mp_daemon_cookie); 680 int bufsize = ndmpd_zfs_args->nz_bufsize; 681 u_longlong_t *bytes_totalp; 682 int count; 683 char *buf; 684 685 buf = ndmp_malloc(bufsize); 686 if (buf == NULL) { 687 NDMP_LOG(LOG_DEBUG, "buf NULL"); 688 return (-1); 689 } 690 691 bytes_totalp = 692 &(session->ns_data.dd_module.dm_stats.ms_bytes_processed); 693 694 for (;;) { 695 bzero(buf, bufsize); 696 697 count = read(ndmpd_zfs_args->nz_pipe_fd[PIPE_TAPE], buf, 698 bufsize); 699 700 if (count == 0) /* EOF */ { 701 NDMP_LOG(LOG_DEBUG, 702 "zfs_send stream size: %llu bytes; " 703 "full backup size (including header): %llu", 704 *bytes_totalp - bufsize, *bytes_totalp); 705 free(buf); 706 707 return (ndmpd_zfs_addenv_backup_size(ndmpd_zfs_args, 708 *bytes_totalp)); 709 } 710 711 if (count == -1) { 712 NDMP_LOG(LOG_DEBUG, "pipe read error (errno %d)", 713 errno); 714 free(buf); 715 return (-1); 716 } 717 NS_ADD(rdisk, count); 718 719 if (MOD_WRITE(ndmpd_zfs_params, buf, count) != 0) { 720 (void) ndmpd_zfs_abort((void *) ndmpd_zfs_args); 721 NDMP_LOG(LOG_ERR, "MOD_WRITE error"); 722 free(buf); 723 return (-1); 724 } 725 726 *bytes_totalp += count; 727 } 728 /* NOTREACHED */ 729 } 730 731 static int 732 ndmpd_zfs_addenv_backup_size(ndmpd_zfs_args_t *ndmpd_zfs_args, 733 u_longlong_t bytes_total) 734 { 735 char zfs_backup_size[32]; 736 int err; 737 738 (void) snprintf(zfs_backup_size, sizeof (zfs_backup_size), "%llu", 739 bytes_total); 740 741 err = MOD_ADDENV(ndmpd_zfs_params, "ZFS_BACKUP_SIZE", zfs_backup_size); 742 743 if (err) { 744 NDMP_LOG(LOG_ERR, "Failed to add ZFS_BACKUP_SIZE env"); 745 return (-1); 746 } 747 748 NDMP_LOG(LOG_DEBUG, "Added ZFS_BACKUP_SIZE env: %s", zfs_backup_size); 749 750 return (0); 751 } 752 753 int 754 ndmpd_zfs_restore_starter(void *arg) 755 { 756 ndmpd_zfs_args_t *ndmpd_zfs_args = arg; 757 ndmpd_session_t *session = (ndmpd_session_t *) 758 (ndmpd_zfs_params->mp_daemon_cookie); 759 int err; 760 761 ndmp_session_ref(session); 762 763 err = ndmpd_zfs_restore(ndmpd_zfs_args); 764 765 MOD_DONE(ndmpd_zfs_params, err); 766 767 NS_DEC(nrs); 768 769 ndmp_session_unref(session); 770 771 ndmpd_zfs_fini(ndmpd_zfs_args); 772 773 return (err); 774 } 775 776 static int 777 ndmpd_zfs_restore(ndmpd_zfs_args_t *ndmpd_zfs_args) 778 { 779 ndmpd_session_t *session = (ndmpd_session_t *) 780 (ndmpd_zfs_params->mp_daemon_cookie); 781 int *read_err = NULL; 782 int *write_err = NULL; 783 int result = 0; 784 int err; 785 786 if (!session->ns_data.dd_abort) { 787 if (ndmpd_zfs_header_read(ndmpd_zfs_args)) { 788 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 789 "ndmpd_zfs header read error\n"); 790 return (-1); 791 } 792 793 err = ndmpd_zfs_reader_writer(ndmpd_zfs_args, 794 &write_err, &read_err); 795 796 if (err || read_err || write_err || session->ns_eof) 797 result = EIO; 798 } 799 800 if (session->ns_data.dd_abort) { 801 NDMP_LOG(LOG_DEBUG, "Restoring to \"%s\" aborted.", 802 ndmpd_zfs_args->nz_dataset); 803 ndmpd_audit_restore(session->ns_connection, 804 ndmpd_zfs_args->nz_dataset, 805 session->ns_data.dd_data_addr.addr_type, 806 ndmpd_zfs_args->nz_dataset, EINTR); 807 (void) ndmpd_zfs_post_restore(ndmpd_zfs_args); 808 err = -1; 809 } else { 810 ndmpd_audit_restore(session->ns_connection, 811 ndmpd_zfs_args->nz_dataset, 812 session->ns_data.dd_data_addr.addr_type, 813 ndmpd_zfs_args->nz_dataset, result); 814 err = ndmpd_zfs_post_restore(ndmpd_zfs_args); 815 if (err || result) 816 err = -1; 817 818 if (err == 0) { 819 NDMP_LOG(LOG_DEBUG, "Restoring to \"%s\" finished", 820 ndmpd_zfs_args->nz_dataset); 821 } else { 822 NDMP_LOG(LOG_DEBUG, "An error occurred while restoring" 823 " to \"%s\"", ndmpd_zfs_args->nz_dataset); 824 } 825 } 826 827 return (err); 828 } 829 830 static int 831 ndmpd_zfs_restore_tape_read(ndmpd_zfs_args_t *ndmpd_zfs_args) 832 { 833 ndmpd_session_t *session = (ndmpd_session_t *) 834 (ndmpd_zfs_params->mp_daemon_cookie); 835 int bufsize = ndmpd_zfs_args->nz_bufsize; 836 u_longlong_t backup_size = ndmpd_zfs_args->nz_zfs_backup_size; 837 u_longlong_t *bytes_totalp; 838 u_longlong_t bytes; 839 char *buf; 840 int count; 841 int err; 842 843 buf = ndmp_malloc(bufsize); 844 if (buf == NULL) { 845 NDMP_LOG(LOG_DEBUG, "buf NULL"); 846 return (-1); 847 } 848 849 bytes_totalp = &ndmpd_zfs_args->nz_nlp->nlp_bytes_total; 850 851 while (*bytes_totalp < backup_size) { 852 853 bytes = backup_size - *bytes_totalp; 854 855 if (bytes >= bufsize) 856 bytes = bufsize; 857 858 err = MOD_READ(ndmpd_zfs_params, buf, bytes); 859 860 if (err != 0) { 861 NDMP_LOG(LOG_ERR, "MOD_READ error: %d; returning -1", 862 err); 863 free(buf); 864 return (-1); 865 } 866 867 count = write(ndmpd_zfs_args->nz_pipe_fd[PIPE_TAPE], buf, 868 bytes); 869 870 if (count != bytes) { 871 NDMP_LOG(LOG_ERR, "count (%d) != bytes (%d)", 872 count, bytes); 873 874 if (count == -1) { 875 NDMP_LOG(LOG_ERR, "pipe write error: errno: %d", 876 errno); 877 878 if (session->ns_data.dd_abort) 879 NDMP_LOG(LOG_DEBUG, "abort set"); 880 } 881 882 free(buf); 883 return (-1); 884 } 885 886 NS_ADD(wdisk, count); 887 888 *bytes_totalp += count; 889 } 890 891 free(buf); 892 return (0); 893 } 894 895 /* 896 * ndmpd_zfs_restore_recv_write() 897 * 898 * This routine executes zfs_receive() to restore the backup. 899 */ 900 901 static int 902 ndmpd_zfs_restore_recv_write(ndmpd_zfs_args_t *ndmpd_zfs_args) 903 { 904 ndmpd_session_t *session = (ndmpd_session_t *) 905 (ndmpd_zfs_params->mp_daemon_cookie); 906 recvflags_t flags; 907 int err; 908 909 bzero(&flags, sizeof (recvflags_t)); 910 911 flags.nomount = B_TRUE; 912 913 NDMP_LOG(LOG_DEBUG, "nz_zfs_force: %d\n", ndmpd_zfs_args->nz_zfs_force); 914 915 if (ndmpd_zfs_args->nz_zfs_force) 916 flags.force = B_TRUE; 917 918 err = zfs_receive(ndmpd_zfs_args->nz_zlibh, ndmpd_zfs_args->nz_dataset, 919 &flags, ndmpd_zfs_args->nz_pipe_fd[PIPE_ZFS], NULL); 920 921 if (err && !session->ns_data.dd_abort) 922 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_receive: %d", err); 923 924 return (err); 925 } 926 927 /* 928 * ndmpd_zfs_reader_writer() 929 * 930 * Two separate threads are used for actual backup or restore. 931 */ 932 933 static int 934 ndmpd_zfs_reader_writer(ndmpd_zfs_args_t *ndmpd_zfs_args, 935 int **sendrecv_errp, int **tape_errp) 936 { 937 funct_t sendrecv_func; 938 funct_t tape_func; 939 int sendrecv_err; 940 int tape_err; 941 942 switch (ndmpd_zfs_params->mp_operation) { 943 case NDMP_DATA_OP_BACKUP: 944 sendrecv_func = (funct_t)ndmpd_zfs_backup_send_read; 945 tape_func = (funct_t)ndmpd_zfs_backup_tape_write; 946 break; 947 case NDMP_DATA_OP_RECOVER: 948 sendrecv_func = (funct_t)ndmpd_zfs_restore_recv_write; 949 tape_func = (funct_t)ndmpd_zfs_restore_tape_read; 950 break; 951 } 952 953 sendrecv_err = pthread_create(&ndmpd_zfs_args->nz_sendrecv_thread, 954 NULL, sendrecv_func, ndmpd_zfs_args); 955 956 if (sendrecv_err == 0) { 957 tape_err = pthread_create(&ndmpd_zfs_args->nz_tape_thread, 958 NULL, tape_func, ndmpd_zfs_args); 959 960 if (tape_err) { 961 /* 962 * The close of the tape side of the pipe will cause 963 * nz_sendrecv_thread to error in the zfs_send/recv() 964 * call and to return. Hence we do not need 965 * to explicitly cancel the sendrecv_thread here 966 * (the pthread_join() below is sufficient). 967 */ 968 969 (void) close(ndmpd_zfs_args->nz_pipe_fd[PIPE_TAPE]); 970 NDMP_LOG(LOG_ERR, "Could not start tape thread; " 971 "aborting z-op"); 972 } 973 974 (void) pthread_join(ndmpd_zfs_args->nz_sendrecv_thread, 975 (void **) sendrecv_errp); 976 } 977 978 if ((tape_err == 0) && 979 (ndmpd_zfs_params->mp_operation == NDMP_DATA_OP_RECOVER)) 980 ndmpd_zfs_close_one_fd(ndmpd_zfs_args, PIPE_TAPE); 981 982 ndmpd_zfs_close_one_fd(ndmpd_zfs_args, PIPE_ZFS); 983 984 if ((sendrecv_err == 0) && (tape_err == 0)) { 985 (void) pthread_join(ndmpd_zfs_args->nz_tape_thread, 986 (void **) tape_errp); 987 } 988 989 if ((tape_err == 0) && 990 (ndmpd_zfs_params->mp_operation == NDMP_DATA_OP_BACKUP)) 991 ndmpd_zfs_close_one_fd(ndmpd_zfs_args, PIPE_TAPE); 992 993 return (sendrecv_err ? sendrecv_err : tape_err); 994 } 995 996 int 997 ndmpd_zfs_abort(void *arg) 998 { 999 ndmpd_zfs_args_t *ndmpd_zfs_args = arg; 1000 char str[8]; 1001 1002 if (ndmpd_zfs_params->mp_operation == NDMP_DATA_OP_BACKUP) 1003 (void) strlcpy(str, "backup", 8); 1004 else 1005 (void) strlcpy(str, "recover", 8); 1006 1007 NDMP_LOG(LOG_ERR, "ndmpd_zfs_abort() called...aborting %s operation", 1008 str); 1009 1010 ndmpd_zfs_close_fds(ndmpd_zfs_args); 1011 1012 return (0); 1013 } 1014 1015 /* 1016 * ndmpd_zfs_pre_backup() 1017 * 1018 * Note: The memset to 0 of nctxp ensures that nctx->nc_cmds == NULL. 1019 * This ensures that ndmp_include_zfs() will fail, which is 1020 * a requirement for "zfs"-type backup. 1021 */ 1022 1023 int 1024 ndmpd_zfs_pre_backup(ndmpd_zfs_args_t *ndmpd_zfs_args) 1025 { 1026 ndmpd_session_t *session = (ndmpd_session_t *) 1027 (ndmpd_zfs_params->mp_daemon_cookie); 1028 ndmp_context_t *nctxp = &ndmpd_zfs_args->nz_nctx; 1029 int err; 1030 1031 if (ndmp_pl == NULL || ndmp_pl->np_pre_backup == NULL) 1032 return (0); 1033 1034 (void) memset(nctxp, 0, sizeof (ndmp_context_t)); 1035 nctxp->nc_plversion = ndmp_pl->np_plversion; 1036 nctxp->nc_plname = ndmpd_get_prop(NDMP_PLUGIN_PATH); 1037 nctxp->nc_ddata = (void *) session; 1038 nctxp->nc_params = ndmpd_zfs_params; 1039 1040 err = ndmp_pl->np_pre_backup(ndmp_pl, nctxp, 1041 ndmpd_zfs_args->nz_dataset); 1042 1043 if (err != 0) { 1044 NDMP_LOG(LOG_DEBUG, "Pre-backup plug-in: %m"); 1045 (void) ndmpd_zfs_post_backup(ndmpd_zfs_args); 1046 } 1047 1048 return (err); 1049 } 1050 1051 int 1052 ndmpd_zfs_post_backup(ndmpd_zfs_args_t *ndmpd_zfs_args) 1053 { 1054 ndmp_context_t *nctxp = &ndmpd_zfs_args->nz_nctx; 1055 int err = 0; 1056 1057 if (ndmp_pl == NULL || ndmp_pl->np_post_backup == NULL) 1058 return (0); 1059 1060 err = ndmp_pl->np_post_backup(ndmp_pl, nctxp, err); 1061 1062 if (err == -1) 1063 NDMP_LOG(LOG_DEBUG, "Post-backup plug-in: %m"); 1064 1065 return (err); 1066 } 1067 1068 int 1069 ndmpd_zfs_pre_restore(ndmpd_zfs_args_t *ndmpd_zfs_args) 1070 { 1071 ndmpd_session_t *session = (ndmpd_session_t *) 1072 (ndmpd_zfs_params->mp_daemon_cookie); 1073 ndmp_context_t *nctxp = &ndmpd_zfs_args->nz_nctx; 1074 char bkpath[ZFS_MAXNAMELEN]; 1075 int err; 1076 1077 if (ndmp_pl == NULL || ndmp_pl->np_pre_restore == NULL) 1078 return (0); 1079 1080 err = ndmpd_zfs_backup_getpath(ndmpd_zfs_args, bkpath, ZFS_MAXNAMELEN); 1081 1082 if (err != 0) { 1083 NDMP_LOG(LOG_DEBUG, "error getting bkup path: %d", err); 1084 return (-1); 1085 } 1086 1087 err = ndmpd_zfs_restore_getpath(ndmpd_zfs_args); 1088 1089 if (err != 0) { 1090 NDMP_LOG(LOG_DEBUG, "error getting restore path: %d", err); 1091 return (-1); 1092 } 1093 1094 (void) memset(nctxp, 0, sizeof (ndmp_context_t)); 1095 nctxp->nc_ddata = (void *) session; 1096 nctxp->nc_params = ndmpd_zfs_params; 1097 1098 err = ndmp_pl->np_pre_restore(ndmp_pl, nctxp, bkpath, 1099 ndmpd_zfs_args->nz_dataset); 1100 1101 if (err != 0) { 1102 NDMP_LOG(LOG_DEBUG, "Pre-restore plug-in: %m"); 1103 return (-1); 1104 } 1105 1106 return (0); 1107 } 1108 1109 int 1110 ndmpd_zfs_post_restore(ndmpd_zfs_args_t *ndmpd_zfs_args) 1111 { 1112 ndmp_context_t *nctxp = &ndmpd_zfs_args->nz_nctx; 1113 int err = 0; 1114 1115 if (ndmp_pl == NULL || ndmp_pl->np_post_restore == NULL) 1116 return (0); 1117 1118 err = ndmp_pl->np_post_restore(ndmp_pl, nctxp, err); 1119 1120 if (err == -1) 1121 NDMP_LOG(LOG_DEBUG, "Post-restore plug-in: %m"); 1122 1123 return (err); 1124 } 1125 1126 boolean_t 1127 ndmpd_zfs_backup_parms_valid(ndmpd_zfs_args_t *ndmpd_zfs_args) 1128 { 1129 ndmpd_zfs_snapfind_t snapdata; 1130 1131 if (ndmpd_zfs_backup_getenv(ndmpd_zfs_args) != 0) 1132 return (B_FALSE); 1133 1134 if (!ndmpd_zfs_backup_pathvalid(ndmpd_zfs_args)) 1135 return (B_FALSE); 1136 1137 if (ndmpd_zfs_is_incremental(ndmpd_zfs_args)) { 1138 (void) ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args, 1139 snapdata.nzs_findprop, ZFS_MAXPROPLEN, B_TRUE); 1140 1141 snapdata.nzs_snapname[0] = '\0'; 1142 snapdata.nzs_snapprop[0] = '\0'; 1143 1144 if (ndmpd_zfs_snapshot_find(ndmpd_zfs_args, &snapdata)) 1145 return (B_FALSE); 1146 1147 if (snapdata.nzs_snapname[0] == '\0') { /* not found */ 1148 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1149 "Snapshot for level %d does not exist\n", 1150 ndmpd_zfs_args->nz_level-1); 1151 return (B_FALSE); 1152 } 1153 1154 (void) strlcpy(ndmpd_zfs_args->nz_fromsnap, 1155 snapdata.nzs_snapname, ZFS_MAXNAMELEN); 1156 } 1157 1158 return (B_TRUE); 1159 } 1160 1161 /* 1162 * ndmpd_zfs_backup_pathvalid() 1163 * 1164 * Make sure the path is of an existing dataset 1165 */ 1166 1167 static boolean_t 1168 ndmpd_zfs_backup_pathvalid(ndmpd_zfs_args_t *ndmpd_zfs_args) 1169 { 1170 char zpath[ZFS_MAXNAMELEN]; 1171 char propstr[ZFS_MAXPROPLEN]; 1172 zfs_handle_t *zhp; 1173 zfs_type_t ztype = 0; 1174 int err; 1175 1176 if (ndmpd_zfs_backup_getpath(ndmpd_zfs_args, zpath, ZFS_MAXNAMELEN) 1177 != 0) 1178 return (B_FALSE); 1179 1180 if (ndmpd_zfs_args->nz_snapname[0] != '\0') { 1181 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, zpath, 1182 ZFS_TYPE_SNAPSHOT); 1183 1184 if (!zhp) { 1185 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, 1186 "zfs_open (snap)"); 1187 ndmpd_zfs_args->nz_snapname[0] = '\0'; 1188 ndmpd_zfs_args->nz_dataset[0] = '\0'; 1189 return (B_FALSE); 1190 } 1191 1192 err = ndmpd_zfs_snapshot_prop_get(zhp, propstr); 1193 1194 zfs_close(zhp); 1195 1196 if (err) { 1197 NDMP_LOG(LOG_DEBUG, 1198 "ndmpd_zfs_snapshot_prop_get failed"); 1199 return (-1); 1200 } 1201 1202 if (propstr && ndmpd_zfs_snapshot_ndmpd_generated(propstr)) { 1203 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1204 "cannot use an ndmpd-generated snapshot\n"); 1205 return (B_FALSE); 1206 } 1207 } 1208 1209 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, 1210 ndmpd_zfs_args->nz_dataset, ZFS_TYPE_DATASET); 1211 1212 if (zhp) { 1213 ztype = zfs_get_type(zhp); 1214 zfs_close(zhp); 1215 } 1216 1217 if ((ztype == ZFS_TYPE_VOLUME) || 1218 (ztype == ZFS_TYPE_FILESYSTEM)) { 1219 ndmpd_zfs_args->nz_type = ztype; 1220 return (B_TRUE); 1221 } 1222 1223 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1224 "Invalid file system or volume.\n"); 1225 1226 return (B_FALSE); 1227 } 1228 1229 /* 1230 * ndmpd_zfs_backup_getpath() 1231 * 1232 * Retrieve the backup path from the environment, which should 1233 * be of the form "/dataset[@snap]". The leading slash is required 1234 * by certain DMA's but can otherwise be ignored. 1235 * 1236 * (Note: "dataset" can consist of more than one component, 1237 * e.g. "pool", "pool/volume", "pool/fs/fs2".) 1238 * 1239 * The dataset name and the snapshot name (if any) will be 1240 * stored in ndmpd_zfs_args. 1241 */ 1242 1243 static int 1244 ndmpd_zfs_backup_getpath(ndmpd_zfs_args_t *ndmpd_zfs_args, char *zpath, 1245 int zlen) 1246 { 1247 char *env_path; 1248 char *at; 1249 1250 env_path = get_backup_path_v3(ndmpd_zfs_params); 1251 if (env_path == NULL) 1252 return (-1); 1253 1254 if (env_path[0] != '/') { 1255 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1256 "Invalid path: %s (leading slash required)\n", env_path); 1257 return (-1); 1258 } 1259 1260 (void) strlcpy(zpath, &env_path[1], zlen); 1261 (void) strlcpy(ndmpd_zfs_args->nz_dataset, &env_path[1], 1262 ZFS_MAXNAMELEN); 1263 1264 at = strchr(ndmpd_zfs_args->nz_dataset, '@'); 1265 if (at) { 1266 *at = '\0'; 1267 (void) strlcpy(ndmpd_zfs_args->nz_snapname, ++at, 1268 ZFS_MAXNAMELEN); 1269 } else { 1270 ndmpd_zfs_args->nz_snapname[0] = '\0'; 1271 } 1272 1273 (void) trim_whitespace(ndmpd_zfs_args->nz_dataset); 1274 1275 return (0); 1276 } 1277 1278 static int 1279 ndmpd_zfs_backup_getenv(ndmpd_zfs_args_t *ndmpd_zfs_args) 1280 { 1281 return (ndmpd_zfs_getenv(ndmpd_zfs_args)); 1282 } 1283 1284 boolean_t 1285 ndmpd_zfs_restore_parms_valid(ndmpd_zfs_args_t *ndmpd_zfs_args) 1286 { 1287 if (ndmpd_zfs_restore_getenv(ndmpd_zfs_args) != 0) 1288 return (B_FALSE); 1289 1290 if (!ndmpd_zfs_restore_pathvalid(ndmpd_zfs_args)) 1291 return (B_FALSE); 1292 1293 return (B_TRUE); 1294 } 1295 1296 static boolean_t 1297 ndmpd_zfs_restore_pathvalid(ndmpd_zfs_args_t *ndmpd_zfs_args) 1298 { 1299 zfs_handle_t *zhp; 1300 char *at; 1301 1302 if (ndmpd_zfs_restore_getpath(ndmpd_zfs_args) != 0) 1303 return (B_FALSE); 1304 1305 at = strchr(ndmpd_zfs_args->nz_dataset, '@'); 1306 1307 if (at) { 1308 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_WARNING, 1309 "%s ignored in restore path\n", at); 1310 *at = '\0'; 1311 } 1312 1313 ndmpd_zfs_args->nz_type = ZFS_TYPE_VOLUME | ZFS_TYPE_FILESYSTEM; 1314 1315 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, 1316 ndmpd_zfs_args->nz_dataset, ndmpd_zfs_args->nz_type); 1317 1318 if (zhp) { 1319 zfs_close(zhp); 1320 1321 if (!ndmpd_zfs_is_incremental(ndmpd_zfs_args)) { 1322 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1323 "Restore dataset exists.\n" 1324 "A nonexistent dataset must be specified " 1325 "for 'zfs' non-incremental restore.\n"); 1326 return (B_FALSE); 1327 } 1328 } 1329 1330 NDMP_LOG(LOG_DEBUG, "restore path: %s\n", ndmpd_zfs_args->nz_dataset); 1331 1332 return (B_TRUE); 1333 } 1334 1335 /* 1336 * ndmpd_zfs_restore_getpath() 1337 * 1338 * Be sure to not include the leading slash, which is required for 1339 * compatibility with backup applications (NBU) but which is not part 1340 * of the ZFS syntax. (Note that this done explicitly in all paths 1341 * below except those calling ndmpd_zfs_backup_getpath(), because it is 1342 * already stripped in that function.) 1343 * 1344 * In addition, the DMA might add a trailing slash to the path. 1345 * Strip all such slashes. 1346 */ 1347 1348 static int 1349 ndmpd_zfs_restore_getpath(ndmpd_zfs_args_t *ndmpd_zfs_args) 1350 { 1351 int version = ndmpd_zfs_params->mp_protocol_version; 1352 char zpath[ZFS_MAXNAMELEN]; 1353 mem_ndmp_name_v3_t *namep_v3; 1354 char *dataset = ndmpd_zfs_args->nz_dataset; 1355 char *nm; 1356 char *p; 1357 int len; 1358 int err; 1359 1360 dataset = ndmpd_zfs_args->nz_dataset; 1361 1362 namep_v3 = (mem_ndmp_name_v3_t *)MOD_GETNAME(ndmpd_zfs_params, 0); 1363 1364 if (namep_v3 == NULL) { 1365 NDMP_LOG(LOG_DEBUG, "Can't get Nlist[0]"); 1366 return (-1); 1367 } 1368 1369 if (namep_v3->nm3_dpath) { 1370 if (namep_v3->nm3_dpath[0] != '/') { 1371 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1372 "Invalid path: %s (leading slash required)\n", 1373 namep_v3->nm3_dpath); 1374 return (-1); 1375 } 1376 1377 (void) strlcpy(dataset, &(namep_v3->nm3_dpath[1]), 1378 ZFS_MAXNAMELEN); 1379 1380 if (namep_v3->nm3_newnm) { 1381 (void) strlcat(dataset, "/", ZFS_MAXNAMELEN); 1382 (void) strlcat(dataset, namep_v3->nm3_newnm, 1383 ZFS_MAXNAMELEN); 1384 1385 } else { 1386 if (version == NDMPV3) { 1387 /* 1388 * The following does not apply for V4. 1389 * 1390 * Find the last component of nm3_opath. 1391 * nm3_opath has no trailing '/'. 1392 */ 1393 p = strrchr(namep_v3->nm3_opath, '/'); 1394 nm = p? p : namep_v3->nm3_opath; 1395 (void) strlcat(dataset, "/", ZFS_MAXNAMELEN); 1396 (void) strlcat(dataset, nm, ZFS_MAXNAMELEN); 1397 } 1398 } 1399 } else { 1400 err = ndmpd_zfs_backup_getpath(ndmpd_zfs_args, zpath, 1401 ZFS_MAXNAMELEN); 1402 if (err) 1403 return (err); 1404 } 1405 1406 len = strlen(dataset); 1407 while (dataset[len-1] == '/') { 1408 dataset[len-1] = '\0'; 1409 len--; 1410 } 1411 1412 return (0); 1413 } 1414 1415 static int 1416 ndmpd_zfs_restore_getenv(ndmpd_zfs_args_t *ndmpd_zfs_args) 1417 { 1418 if (ndmpd_zfs_getenv_zfs_backup_size(ndmpd_zfs_args) != 0) 1419 return (-1); 1420 1421 return (ndmpd_zfs_getenv(ndmpd_zfs_args)); 1422 } 1423 1424 static int 1425 ndmpd_zfs_getenv(ndmpd_zfs_args_t *ndmpd_zfs_args) 1426 { 1427 1428 if (ndmpd_zfs_getenv_level(ndmpd_zfs_args) != 0) 1429 return (-1); 1430 1431 if (ndmpd_zfs_getenv_zfs_mode(ndmpd_zfs_args) != 0) 1432 return (-1); 1433 1434 if (ndmpd_zfs_getenv_zfs_force(ndmpd_zfs_args) != 0) 1435 return (-1); 1436 1437 if (ndmpd_zfs_getenv_update(ndmpd_zfs_args) != 0) 1438 return (-1); 1439 1440 if (ndmpd_zfs_getenv_dmp_name(ndmpd_zfs_args) != 0) 1441 return (-1); 1442 1443 return (0); 1444 } 1445 1446 static int 1447 ndmpd_zfs_getenv_zfs_mode(ndmpd_zfs_args_t *ndmpd_zfs_args) 1448 { 1449 char *envp; 1450 1451 envp = MOD_GETENV(ndmpd_zfs_params, "ZFS_MODE"); 1452 1453 if (envp == NULL) { 1454 NDMP_LOG(LOG_DEBUG, "env(ZFS_MODE) not specified, " 1455 "defaulting to recursive"); 1456 ndmpd_zfs_args->nz_zfs_mode = 'r'; 1457 return (0); 1458 } 1459 1460 if ((strcmp(envp, "dataset") == 0) || (strcmp(envp, "d") == 0)) { 1461 ndmpd_zfs_args->nz_zfs_mode = 'd'; 1462 } else if ((strcmp(envp, "recursive") == 0) || 1463 (strcmp(envp, "r") == 0)) { 1464 ndmpd_zfs_args->nz_zfs_mode = 'r'; 1465 } else if ((strcmp(envp, "package") == 0) || (strcmp(envp, "p") == 0)) { 1466 ndmpd_zfs_args->nz_zfs_mode = 'p'; 1467 } else { 1468 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1469 "Invalid ZFS_MODE value \"%s\".\n", envp); 1470 return (-1); 1471 } 1472 1473 NDMP_LOG(LOG_DEBUG, "env(ZFS_MODE): \"%c\"", 1474 ndmpd_zfs_args->nz_zfs_mode); 1475 1476 return (0); 1477 } 1478 1479 /* 1480 * ndmpd_zfs_getenv_zfs_force() 1481 * 1482 * If SMF property zfs-force-override is set to "yes" or "no", this 1483 * value will override any value of NDMP environment variable ZFS_FORCE 1484 * as set by the DMA admin (or override the default of 'n', if ZFS_FORCE 1485 * is not set). By default, zfs-force-override is "off", which means it 1486 * will not override ZFS_FORCE. 1487 */ 1488 1489 static int 1490 ndmpd_zfs_getenv_zfs_force(ndmpd_zfs_args_t *ndmpd_zfs_args) 1491 { 1492 char *envp_force; 1493 char *override; 1494 1495 override = ndmpd_get_prop(NDMP_ZFS_FORCE_OVERRIDE); 1496 1497 if (strcasecmp(override, "yes") == 0) { 1498 ndmpd_zfs_args->nz_zfs_force = B_TRUE; 1499 NDMP_LOG(LOG_NOTICE, 1500 "SMF property zfs-force-override set to 'yes', " 1501 "overriding ZFS_FORCE"); 1502 return (0); 1503 } 1504 1505 if (strcasecmp(override, "no") == 0) { 1506 ndmpd_zfs_args->nz_zfs_force = B_FALSE; 1507 NDMP_LOG(LOG_NOTICE, 1508 "SMF property zfs-force-override set to 'no', " 1509 "overriding ZFS_FORCE"); 1510 return (0); 1511 } 1512 1513 if (strcasecmp(override, "off") != 0) { 1514 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1515 "SMF property zfs-force-override set to invalid value of " 1516 "'%s'; treating it as 'off'.", override); 1517 } 1518 1519 envp_force = MOD_GETENV(ndmpd_zfs_params, "ZFS_FORCE"); 1520 1521 if (envp_force == NULL) { 1522 NDMP_LOG(LOG_DEBUG, 1523 "env(ZFS_FORCE) not specified, defaulting to FALSE"); 1524 ndmpd_zfs_args->nz_zfs_force = B_FALSE; 1525 return (0); 1526 } 1527 1528 /* 1529 * The value can be either 't' ("true" for v3) or 'y' ("yes" for v4). 1530 */ 1531 1532 if (strchr("tTyY", *envp_force)) 1533 ndmpd_zfs_args->nz_zfs_force = B_TRUE; 1534 1535 NDMP_LOG(LOG_DEBUG, "env(ZFS_FORCE): \"%s\"", envp_force); 1536 1537 return (0); 1538 } 1539 1540 static int 1541 ndmpd_zfs_getenv_level(ndmpd_zfs_args_t *ndmpd_zfs_args) 1542 { 1543 char *envp; 1544 1545 envp = MOD_GETENV(ndmpd_zfs_params, "LEVEL"); 1546 1547 if (envp == NULL) { 1548 NDMP_LOG(LOG_DEBUG, "env(LEVEL) not specified, " 1549 "defaulting to 0"); 1550 ndmpd_zfs_args->nz_level = 0; 1551 return (0); 1552 } 1553 1554 if (envp[1] != '\0') { 1555 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1556 "Invalid backup level \"%s\".\n", envp); 1557 return (-1); 1558 } 1559 1560 if (!isdigit(*envp)) { 1561 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1562 "Invalid backup level \"%s\".\n", envp); 1563 return (-1); 1564 } 1565 1566 ndmpd_zfs_args->nz_level = atoi(envp); 1567 1568 NDMP_LOG(LOG_DEBUG, "env(LEVEL): \"%d\"", 1569 ndmpd_zfs_args->nz_level); 1570 1571 return (0); 1572 } 1573 1574 static int 1575 ndmpd_zfs_getenv_update(ndmpd_zfs_args_t *ndmpd_zfs_args) 1576 { 1577 char *envp_update; 1578 1579 envp_update = MOD_GETENV(ndmpd_zfs_params, "UPDATE"); 1580 1581 if (envp_update == NULL) { 1582 NDMP_LOG(LOG_DEBUG, 1583 "env(UPDATE) not specified, defaulting to TRUE"); 1584 ndmpd_zfs_args->nz_update = B_TRUE; 1585 return (0); 1586 } 1587 1588 /* 1589 * The value can be either 't' ("true" for v3) or 'y' ("yes" for v4). 1590 */ 1591 1592 if (strchr("tTyY", *envp_update)) 1593 ndmpd_zfs_args->nz_update = B_TRUE; 1594 1595 NDMP_LOG(LOG_DEBUG, "env(UPDATE): \"%s\"", envp_update); 1596 1597 return (0); 1598 } 1599 1600 static int 1601 ndmpd_zfs_getenv_dmp_name(ndmpd_zfs_args_t *ndmpd_zfs_args) 1602 { 1603 char *envp; 1604 1605 envp = MOD_GETENV(ndmpd_zfs_params, "DMP_NAME"); 1606 1607 if (envp == NULL) { 1608 NDMP_LOG(LOG_DEBUG, 1609 "env(DMP_NAME) not specified, defaulting to 'level'"); 1610 (void) strlcpy(ndmpd_zfs_args->nz_dmp_name, "level", 1611 NDMPD_ZFS_DMP_NAME_MAX); 1612 return (0); 1613 } 1614 1615 if (!ndmpd_zfs_dmp_name_valid(ndmpd_zfs_args, envp)) 1616 return (-1); 1617 1618 (void) strlcpy(ndmpd_zfs_args->nz_dmp_name, envp, 1619 NDMPD_ZFS_DMP_NAME_MAX); 1620 1621 NDMP_LOG(LOG_DEBUG, "env(DMP_NAME): \"%s\"", envp); 1622 1623 return (0); 1624 } 1625 1626 static int 1627 ndmpd_zfs_getenv_zfs_backup_size(ndmpd_zfs_args_t *ndmpd_zfs_args) 1628 { 1629 char *zfs_backup_size; 1630 1631 zfs_backup_size = MOD_GETENV(ndmpd_zfs_params, "ZFS_BACKUP_SIZE"); 1632 1633 if (zfs_backup_size == NULL) { 1634 NDMP_LOG(LOG_ERR, "ZFS_BACKUP_SIZE env is NULL"); 1635 return (-1); 1636 } 1637 1638 NDMP_LOG(LOG_DEBUG, "ZFS_BACKUP_SIZE: %s\n", zfs_backup_size); 1639 1640 (void) sscanf(zfs_backup_size, "%llu", 1641 &ndmpd_zfs_args->nz_zfs_backup_size); 1642 1643 return (0); 1644 } 1645 1646 /* 1647 * ndmpd_zfs_dmp_name_valid() 1648 * 1649 * This function verifies that the dmp_name is valid. 1650 * 1651 * The dmp_name is restricted to alphanumeric characters plus 1652 * the underscore and hyphen, and must be 31 characters or less. 1653 * This is due to its use in the NDMPD_ZFS_PROP_INCR property 1654 * and in the ZFS snapshot name (if an ndmpd-generated snapshot 1655 * is required). 1656 */ 1657 1658 static boolean_t 1659 ndmpd_zfs_dmp_name_valid(ndmpd_zfs_args_t *ndmpd_zfs_args, char *dmp_name) 1660 { 1661 char *c; 1662 1663 if (strlen(dmp_name) >= NDMPD_ZFS_DMP_NAME_MAX) { 1664 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1665 "DMP_NAME %s is longer than %d\n", 1666 dmp_name, NDMPD_ZFS_DMP_NAME_MAX-1); 1667 return (B_FALSE); 1668 } 1669 1670 for (c = dmp_name; *c != '\0'; c++) { 1671 if (!isalpha(*c) && !isdigit(*c) && 1672 (*c != '_') && (*c != '-')) { 1673 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1674 "DMP_NAME %s contains illegal character %c\n", 1675 dmp_name, *c); 1676 return (B_FALSE); 1677 } 1678 } 1679 1680 NDMP_LOG(LOG_DEBUG, "DMP_NAME is valid: %s\n", dmp_name); 1681 return (B_TRUE); 1682 } 1683 1684 /* 1685 * ndmpd_zfs_is_incremental() 1686 * 1687 * This can only be called after ndmpd_zfs_getenv_level() 1688 * has been called. 1689 */ 1690 1691 static boolean_t 1692 ndmpd_zfs_is_incremental(ndmpd_zfs_args_t *ndmpd_zfs_args) 1693 { 1694 return (ndmpd_zfs_args->nz_level != 0); 1695 } 1696 1697 /* 1698 * ndmpd_zfs_snapshot_prepare() 1699 * 1700 * If no snapshot was supplied by the user, create a snapshot 1701 * for use by ndmpd. 1702 */ 1703 1704 static int 1705 ndmpd_zfs_snapshot_prepare(ndmpd_zfs_args_t *ndmpd_zfs_args) 1706 { 1707 ndmpd_session_t *session = (ndmpd_session_t *) 1708 (ndmpd_zfs_params->mp_daemon_cookie); 1709 boolean_t recursive = B_FALSE; 1710 int zfs_err = 0; 1711 1712 if (session->ns_data.dd_abort) { 1713 NDMP_LOG(LOG_DEBUG, "Backing up \"%s\" aborted.", 1714 ndmpd_zfs_args->nz_dataset); 1715 return (-1); 1716 } 1717 1718 if (ndmpd_zfs_args->nz_snapname[0] == '\0') { 1719 ndmpd_zfs_args->nz_ndmpd_snap = B_TRUE; 1720 1721 if (ndmpd_zfs_snapshot_create(ndmpd_zfs_args) != 0) { 1722 ndmpd_zfs_args->nz_snapname[0] = '\0'; 1723 1724 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1725 "Error creating snapshot for %s\n", 1726 ndmpd_zfs_args->nz_dataset); 1727 1728 return (-1); 1729 } 1730 } 1731 1732 if (ndmpd_zfs_snapshot_prop_add(ndmpd_zfs_args)) { 1733 NDMP_LOG(LOG_DEBUG, 1734 "ndmpd_zfs_snapshot_prop_add error\n"); 1735 1736 if (ndmpd_zfs_args->nz_ndmpd_snap) { 1737 1738 if (ndmpd_zfs_args->nz_zfs_mode != 'd') 1739 recursive = B_TRUE; 1740 1741 (void) snapshot_destroy(ndmpd_zfs_args->nz_dataset, 1742 ndmpd_zfs_args->nz_snapname, recursive, B_FALSE, 1743 &zfs_err); 1744 } 1745 1746 return (-1); 1747 } 1748 1749 return (0); 1750 } 1751 1752 /* 1753 * ndmpd_zfs_snapshot_cleanup() 1754 * 1755 * If UPDATE = y, find the old snapshot (if any) corresponding to 1756 * {LEVEL, DMP_NAME, ZFS_MODE}. If it was ndmpd-generated, 1757 * remove the snapshot. Otherwise, update its NDMPD_ZFS_PROP_INCR 1758 * property to remove {L, D, Z}. 1759 * 1760 * If UPDATE = n, if an ndmpd-generated snapshot was used for backup, 1761 * remove the snapshot. Otherwise, update its NDMPD_ZFS_PROP_INCR 1762 * property to remove {L, D, Z}. 1763 */ 1764 1765 static int 1766 ndmpd_zfs_snapshot_cleanup(ndmpd_zfs_args_t *ndmpd_zfs_args, int err) 1767 { 1768 ndmpd_session_t *session = (ndmpd_session_t *) 1769 (ndmpd_zfs_params->mp_daemon_cookie); 1770 ndmpd_zfs_snapfind_t snapdata; 1771 boolean_t ndmpd_generated = B_FALSE; 1772 1773 bzero(&snapdata, sizeof (ndmpd_zfs_snapfind_t)); 1774 1775 (void) ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args, 1776 snapdata.nzs_findprop, ZFS_MAXPROPLEN, B_FALSE); 1777 1778 if (ndmpd_zfs_args->nz_update && !session->ns_data.dd_abort && !err) { 1779 /* 1780 * Find the existing snapshot, if any, to "unuse." 1781 * Indicate that the current snapshot used for backup 1782 * should be skipped in the search. (The search is 1783 * sorted by creation time but this cannot be relied 1784 * upon for user-supplied snapshots.) 1785 */ 1786 1787 (void) snprintf(snapdata.nzs_snapskip, ZFS_MAXNAMELEN, "%s", 1788 ndmpd_zfs_args->nz_snapname); 1789 1790 if (ndmpd_zfs_snapshot_find(ndmpd_zfs_args, &snapdata)) { 1791 NDMP_LOG(LOG_DEBUG, "ndmpd_zfs_snapshot_find error\n"); 1792 goto _remove_tmp_snap; 1793 } 1794 1795 if (snapdata.nzs_snapname[0] != '\0') { /* snapshot found */ 1796 ndmpd_generated = ndmpd_zfs_snapshot_ndmpd_generated 1797 (snapdata.nzs_snapprop); 1798 1799 if (ndmpd_zfs_snapshot_unuse(ndmpd_zfs_args, 1800 ndmpd_generated, &snapdata) != 0) { 1801 NDMP_LOG(LOG_DEBUG, 1802 "ndmpd_zfs_snapshot_unuse error\n"); 1803 goto _remove_tmp_snap; 1804 } 1805 } 1806 1807 if (session->ns_data.dd_abort) 1808 goto _remove_tmp_snap; 1809 1810 return (0); 1811 } 1812 1813 _remove_tmp_snap: 1814 1815 (void) snprintf(snapdata.nzs_snapname, ZFS_MAXNAMELEN, "%s", 1816 ndmpd_zfs_args->nz_snapname); 1817 1818 (void) strlcpy(snapdata.nzs_snapprop, ndmpd_zfs_args->nz_snapprop, 1819 ZFS_MAXPROPLEN); 1820 1821 snapdata.nzs_snapskip[0] = '\0'; 1822 1823 if (ndmpd_zfs_snapshot_unuse(ndmpd_zfs_args, 1824 ndmpd_zfs_args->nz_ndmpd_snap, &snapdata) != 0) { 1825 NDMP_LOG(LOG_DEBUG, "ndmpd_zfs_snapshot_unuse error\n"); 1826 return (-1); 1827 } 1828 1829 if (!ndmpd_zfs_args->nz_update) 1830 return (0); 1831 1832 return (-1); 1833 } 1834 1835 static int 1836 ndmpd_zfs_snapshot_create(ndmpd_zfs_args_t *ndmpd_zfs_args) 1837 { 1838 boolean_t recursive = B_FALSE; 1839 1840 if (ndmpd_zfs_snapname_create(ndmpd_zfs_args, 1841 ndmpd_zfs_args->nz_snapname, ZFS_MAXNAMELEN -1) < 0) { 1842 NDMP_LOG(LOG_ERR, "Error (%d) creating snapshot name for %s", 1843 errno, ndmpd_zfs_args->nz_dataset); 1844 return (-1); 1845 } 1846 1847 if (ndmpd_zfs_args->nz_zfs_mode != 'd') 1848 recursive = B_TRUE; 1849 1850 if (snapshot_create(ndmpd_zfs_args->nz_dataset, 1851 ndmpd_zfs_args->nz_snapname, recursive, B_FALSE) != 0) { 1852 NDMP_LOG(LOG_ERR, "could not create snapshot %s@%s", 1853 ndmpd_zfs_args->nz_dataset, ndmpd_zfs_args->nz_snapname); 1854 return (-1); 1855 } 1856 1857 NDMP_LOG(LOG_DEBUG, "created snapshot %s@%s", 1858 ndmpd_zfs_args->nz_dataset, ndmpd_zfs_args->nz_snapname); 1859 1860 return (0); 1861 } 1862 1863 /* 1864 * ndmpd_zfs_snapshot_unuse() 1865 * 1866 * Given a pre-existing snapshot of the given {L, D, Z}: 1867 * If snapshot is ndmpd-generated, remove snapshot. 1868 * If not ndmpd-generated, or if the ndmpd-generated snapshot 1869 * cannot be destroyed, remove the {L, D, Z} substring from the 1870 * snapshot's NDMPD_ZFS_PROP_INCR property. 1871 * 1872 * In the event of a failure, it may be that two snapshots will 1873 * have the {L, D, Z} property set on them. This is not desirable, 1874 * so return an error and log the failure. 1875 */ 1876 1877 static int 1878 ndmpd_zfs_snapshot_unuse(ndmpd_zfs_args_t *ndmpd_zfs_args, 1879 boolean_t ndmpd_generated, ndmpd_zfs_snapfind_t *snapdata_p) 1880 { 1881 boolean_t recursive = B_FALSE; 1882 int zfs_err = 0; 1883 int err = 0; 1884 1885 if (ndmpd_generated) { 1886 if (ndmpd_zfs_args->nz_zfs_mode != 'd') 1887 recursive = B_TRUE; 1888 1889 err = snapshot_destroy(ndmpd_zfs_args->nz_dataset, 1890 snapdata_p->nzs_snapname, recursive, B_FALSE, &zfs_err); 1891 1892 if (err) { 1893 NDMP_LOG(LOG_ERR, "snapshot_destroy: %s@%s;" 1894 " err: %d; zfs_err: %d", 1895 ndmpd_zfs_args->nz_dataset, 1896 snapdata_p->nzs_snapname, err, zfs_err); 1897 return (-1); 1898 } 1899 } 1900 1901 if (!ndmpd_generated || zfs_err) { 1902 if (ndmpd_zfs_snapshot_prop_remove(ndmpd_zfs_args, snapdata_p)) 1903 return (-1); 1904 } 1905 1906 return (0); 1907 } 1908 1909 static boolean_t 1910 ndmpd_zfs_snapshot_ndmpd_generated(char *snapprop) 1911 { 1912 char origin; 1913 1914 (void) sscanf(snapprop, "%*u.%*u.%c%*s", &origin); 1915 1916 return (origin == 'n'); 1917 } 1918 1919 /* 1920 * ndmpd_zfs_snapshot_find() 1921 * 1922 * Find a snapshot with a particular value for 1923 * the NDMPD_ZFS_PROP_INCR property. 1924 */ 1925 1926 static int 1927 ndmpd_zfs_snapshot_find(ndmpd_zfs_args_t *ndmpd_zfs_args, 1928 ndmpd_zfs_snapfind_t *snapdata) 1929 { 1930 zfs_handle_t *zhp; 1931 int err; 1932 1933 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, ndmpd_zfs_args->nz_dataset, 1934 ndmpd_zfs_args->nz_type); 1935 1936 if (!zhp) { 1937 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_open"); 1938 return (-1); 1939 } 1940 1941 err = zfs_iter_snapshots_sorted(zhp, ndmpd_zfs_snapshot_prop_find, 1942 snapdata); 1943 1944 zfs_close(zhp); 1945 1946 if (err) { 1947 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_iter_snapshots: %d", 1948 err); 1949 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1950 "Error iterating snapshots\n"); 1951 return (-1); 1952 } 1953 1954 return (0); 1955 } 1956 1957 /* 1958 * ndmpd_zfs_snapshot_prop_find() 1959 * 1960 * Find a snapshot with a particular value for 1961 * NDMPD_ZFS_PROP_INCR. Fill in data for the first one 1962 * found (sorted by creation time). However, skip the 1963 * the snapshot indicated in nzs_snapskip, if any. 1964 */ 1965 1966 static int 1967 ndmpd_zfs_snapshot_prop_find(zfs_handle_t *zhp, void *arg) 1968 { 1969 ndmpd_zfs_snapfind_t *snapdata_p = (ndmpd_zfs_snapfind_t *)arg; 1970 char propstr[ZFS_MAXPROPLEN]; 1971 char findprop_plus_slash[ZFS_MAXPROPLEN]; 1972 char *justsnap; 1973 int err = 0; 1974 1975 if (snapdata_p->nzs_snapname[0] != '\0') { 1976 NDMP_LOG(LOG_DEBUG, "no need to get prop for snapshot %s", 1977 (char *)zfs_get_name(zhp)); 1978 goto _done; 1979 } 1980 1981 err = ndmpd_zfs_snapshot_prop_get(zhp, propstr); 1982 1983 if (err) { 1984 NDMP_LOG(LOG_DEBUG, "ndmpd_zfs_snapshot_prop_get failed"); 1985 goto _done; 1986 } 1987 1988 if (propstr[0] == '\0') { 1989 NDMP_LOG(LOG_DEBUG, "snapshot %s: propr not set", 1990 (char *)zfs_get_name(zhp)); 1991 goto _done; 1992 } 1993 1994 (void) snprintf(findprop_plus_slash, ZFS_MAXPROPLEN, "/%s", 1995 snapdata_p->nzs_findprop); 1996 1997 if (!strstr((const char *)propstr, 1998 (const char *)findprop_plus_slash)) { 1999 NDMP_LOG(LOG_DEBUG, "snapshot %s: property %s (%s not found)", 2000 (char *)zfs_get_name(zhp), propstr, 2001 snapdata_p->nzs_findprop); 2002 goto _done; 2003 } 2004 2005 if (!ndmpd_zfs_prop_version_check(propstr, 2006 &snapdata_p->nzs_prop_major, &snapdata_p->nzs_prop_minor)) { 2007 NDMP_LOG(LOG_DEBUG, "snapshot %s: property %s (%s found)", 2008 (char *)zfs_get_name(zhp), propstr, 2009 snapdata_p->nzs_findprop); 2010 NDMP_LOG(LOG_DEBUG, "did not pass version check"); 2011 goto _done; 2012 } 2013 2014 justsnap = strchr(zfs_get_name(zhp), '@') + 1; 2015 2016 if (strcmp(justsnap, snapdata_p->nzs_snapskip) != 0) { 2017 (void) strlcpy(snapdata_p->nzs_snapname, justsnap, 2018 ZFS_MAXNAMELEN); 2019 2020 (void) strlcpy(snapdata_p->nzs_snapprop, propstr, 2021 ZFS_MAXPROPLEN); 2022 2023 NDMP_LOG(LOG_DEBUG, "found match: %s [%s]\n", 2024 snapdata_p->nzs_snapname, snapdata_p->nzs_snapprop); 2025 } 2026 2027 _done: 2028 zfs_close(zhp); 2029 return (err); 2030 } 2031 2032 /* 2033 * ndmpd_zfs_snapshot_prop_get() 2034 * 2035 * Retrieve NDMPD_ZFS_PROP_INCR property from snapshot 2036 */ 2037 2038 static int 2039 ndmpd_zfs_snapshot_prop_get(zfs_handle_t *zhp, char *propstr) 2040 { 2041 nvlist_t *userprop; 2042 nvlist_t *propval; 2043 char *strval; 2044 int err; 2045 2046 propstr[0] = '\0'; 2047 2048 userprop = zfs_get_user_props(zhp); 2049 2050 if (userprop == NULL) 2051 return (0); 2052 2053 err = nvlist_lookup_nvlist(userprop, NDMPD_ZFS_PROP_INCR, &propval); 2054 2055 if (err != 0) { 2056 if (err == ENOENT) 2057 return (0); 2058 2059 NDMP_LOG(LOG_DEBUG, "nvlist_lookup_nvlist error: %d\n", err); 2060 2061 return (-1); 2062 } 2063 2064 err = nvlist_lookup_string(propval, ZPROP_VALUE, &strval); 2065 2066 if (err != 0) { 2067 if (err == ENOENT) 2068 return (0); 2069 2070 NDMP_LOG(LOG_DEBUG, "nvlist_lookup_string error: %d\n", err); 2071 2072 return (-1); 2073 } 2074 2075 (void) strlcpy(propstr, strval, ZFS_MAXPROPLEN); 2076 2077 return (0); 2078 } 2079 2080 /* 2081 * ndmpd_zfs_snapshot_prop_add() 2082 * 2083 * Update snapshot's NDMPD_ZFS_PROP_INCR property with 2084 * the current LEVEL, DMP_NAME, and ZFS_MODE values 2085 * (add property if it doesn't exist) 2086 */ 2087 2088 static int 2089 ndmpd_zfs_snapshot_prop_add(ndmpd_zfs_args_t *ndmpd_zfs_args) 2090 { 2091 char fullname[ZFS_MAXNAMELEN]; 2092 char propstr[ZFS_MAXPROPLEN]; 2093 zfs_handle_t *zhp; 2094 boolean_t set; 2095 int err; 2096 2097 (void) snprintf(fullname, ZFS_MAXNAMELEN, "%s@%s", 2098 ndmpd_zfs_args->nz_dataset, 2099 ndmpd_zfs_args->nz_snapname); 2100 2101 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, fullname, ZFS_TYPE_SNAPSHOT); 2102 2103 if (!zhp) { 2104 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_open (snap)"); 2105 return (-1); 2106 } 2107 2108 bzero(propstr, ZFS_MAXPROPLEN); 2109 2110 if (ndmpd_zfs_snapshot_prop_get(zhp, propstr)) { 2111 NDMP_LOG(LOG_DEBUG, "error getting property"); 2112 zfs_close(zhp); 2113 return (-1); 2114 } 2115 2116 if (ndmpd_zfs_snapshot_prop_create(ndmpd_zfs_args, propstr, &set)) { 2117 zfs_close(zhp); 2118 return (-1); 2119 } 2120 2121 if (set) { 2122 err = zfs_prop_set(zhp, NDMPD_ZFS_PROP_INCR, propstr); 2123 if (err) { 2124 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_prop_set: %d", 2125 err); 2126 NDMP_LOG(LOG_ERR, "error setting property %s", 2127 propstr); 2128 zfs_close(zhp); 2129 return (-1); 2130 } 2131 } 2132 2133 zfs_close(zhp); 2134 2135 (void) strlcpy(ndmpd_zfs_args->nz_snapprop, propstr, ZFS_MAXPROPLEN); 2136 2137 return (0); 2138 } 2139 2140 static int 2141 ndmpd_zfs_snapshot_prop_create(ndmpd_zfs_args_t *ndmpd_zfs_args, 2142 char *propstr, boolean_t *set) 2143 { 2144 char subprop[ZFS_MAXPROPLEN]; 2145 char *p = propstr; 2146 int slash_count = 0; 2147 2148 *set = B_TRUE; 2149 2150 (void) ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args, 2151 subprop, ZFS_MAXPROPLEN, B_FALSE); 2152 2153 if (propstr[0] == '\0') { 2154 (void) snprintf(propstr, ZFS_MAXPROPLEN, "%u.%u.%c/%s", 2155 NDMPD_ZFS_PROP_MAJOR_VERSION, 2156 NDMPD_ZFS_PROP_MINOR_VERSION, 2157 (ndmpd_zfs_args->nz_ndmpd_snap) ? 'n' : 'u', 2158 subprop); 2159 return (0); 2160 } 2161 2162 if (strstr((const char *)propstr, (const char *)subprop)) { 2163 NDMP_LOG(LOG_DEBUG, "Did not add entry %s as it already exists", 2164 subprop); 2165 *set = B_FALSE; 2166 return (0); 2167 } 2168 2169 while (*p) { 2170 if (*(p++) == '/') 2171 slash_count++; 2172 } 2173 2174 if (slash_count >= NDMPD_ZFS_SUBPROP_MAX) { 2175 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2176 "snapshot %s: user property %s limit of %d subprops " 2177 "reached; cannot complete operation", 2178 ndmpd_zfs_args->nz_snapname, 2179 NDMPD_ZFS_PROP_INCR, 2180 NDMPD_ZFS_SUBPROP_MAX); 2181 return (-1); 2182 } 2183 2184 assert((strlen(propstr) + strlen(subprop) + 2) < ZFS_MAXPROPLEN); 2185 2186 (void) strlcat(propstr, "/", ZFS_MAXPROPLEN); 2187 (void) strlcat(propstr, subprop, ZFS_MAXPROPLEN); 2188 2189 return (0); 2190 } 2191 2192 static int 2193 ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args_t *ndmpd_zfs_args, 2194 char *subprop, int len, boolean_t prev_level) 2195 { 2196 return (snprintf(subprop, len, "%d.%s.%c", 2197 prev_level ? ndmpd_zfs_args->nz_level-1 : ndmpd_zfs_args->nz_level, 2198 ndmpd_zfs_args->nz_dmp_name, 2199 ndmpd_zfs_args->nz_zfs_mode)); 2200 } 2201 2202 /* 2203 * ndmpd_zfs_snapshot_prop_remove() 2204 * 2205 * Remove specified substring from the snapshot's 2206 * NDMPD_ZFS_PROP_INCR property 2207 */ 2208 2209 static int 2210 ndmpd_zfs_snapshot_prop_remove(ndmpd_zfs_args_t *ndmpd_zfs_args, 2211 ndmpd_zfs_snapfind_t *snapdata_p) 2212 { 2213 char findprop_plus_slash[ZFS_MAXPROPLEN]; 2214 char fullname[ZFS_MAXNAMELEN]; 2215 char newprop[ZFS_MAXPROPLEN]; 2216 char tmpstr[ZFS_MAXPROPLEN]; 2217 zfs_handle_t *zhp; 2218 char *ptr; 2219 int err; 2220 2221 (void) snprintf(fullname, ZFS_MAXNAMELEN, "%s@%s", 2222 ndmpd_zfs_args->nz_dataset, 2223 snapdata_p->nzs_snapname); 2224 2225 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, fullname, ZFS_TYPE_SNAPSHOT); 2226 2227 if (!zhp) { 2228 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_open"); 2229 return (-1); 2230 } 2231 2232 bzero(newprop, ZFS_MAXPROPLEN); 2233 2234 /* 2235 * If the substring to be removed is the only {L, D, Z} 2236 * in the property, remove the entire property 2237 */ 2238 2239 tmpstr[0] = '\0'; 2240 2241 (void) sscanf(snapdata_p->nzs_snapprop, "%*u.%*u.%*c/%1023s", tmpstr); 2242 2243 if (strcmp(tmpstr, snapdata_p->nzs_findprop) == 0) { 2244 2245 err = zfs_prop_set(zhp, NDMPD_ZFS_PROP_INCR, newprop); 2246 2247 zfs_close(zhp); 2248 2249 if (err) { 2250 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_prop_set: %d", 2251 err); 2252 NDMP_LOG(LOG_ERR, "error setting property %s", newprop); 2253 return (-1); 2254 } 2255 2256 return (0); 2257 } 2258 2259 (void) snprintf(findprop_plus_slash, ZFS_MAXPROPLEN, "/%s", 2260 snapdata_p->nzs_findprop); 2261 2262 ptr = strstr((const char *)snapdata_p->nzs_snapprop, 2263 (const char *)findprop_plus_slash); 2264 2265 if (ptr == NULL) { 2266 /* 2267 * This shouldn't happen. Just return success. 2268 */ 2269 zfs_close(zhp); 2270 2271 return (0); 2272 } 2273 2274 /* 2275 * Remove "nzs_findprop" substring from property 2276 * 2277 * Example property: 2278 * 0.0.u/1.bob.p/0.jane.d 2279 * 2280 * Note that there will always be a prefix to the 2281 * strstr() result. Hence the below code works for 2282 * all cases. 2283 */ 2284 2285 ptr--; 2286 (void) strncpy(newprop, snapdata_p->nzs_snapprop, 2287 (char *)ptr - snapdata_p->nzs_snapprop); 2288 ptr += strlen(snapdata_p->nzs_findprop) + 1; 2289 (void) strlcat(newprop, ptr, ZFS_MAXPROPLEN); 2290 2291 err = zfs_prop_set(zhp, NDMPD_ZFS_PROP_INCR, newprop); 2292 2293 zfs_close(zhp); 2294 2295 if (err) { 2296 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_prop_set: %d", err); 2297 NDMP_LOG(LOG_ERR, "error modifying property %s", newprop); 2298 return (-1); 2299 } 2300 2301 return (0); 2302 } 2303 2304 static boolean_t 2305 ndmpd_zfs_prop_version_check(char *propstr, uint32_t *major, uint32_t *minor) 2306 { 2307 (void) sscanf(propstr, "%u.%u.%*c%*s", major, minor); 2308 2309 if (*major > NDMPD_ZFS_PROP_MAJOR_VERSION) { 2310 NDMP_LOG(LOG_ERR, "unsupported prop major (%u > %u)", 2311 *major, NDMPD_ZFS_PROP_MAJOR_VERSION); 2312 return (B_FALSE); 2313 } 2314 2315 if (*minor > NDMPD_ZFS_PROP_MINOR_VERSION) { 2316 NDMP_LOG(LOG_ERR, "later prop minor (%u > %u)", 2317 *minor, NDMPD_ZFS_PROP_MINOR_VERSION); 2318 } 2319 2320 NDMP_LOG(LOG_DEBUG, "passed version check: " 2321 "supported prop major (%u <= %u); (snapprop minor: %u [%u])", 2322 *major, NDMPD_ZFS_PROP_MAJOR_VERSION, 2323 *minor, NDMPD_ZFS_PROP_MINOR_VERSION); 2324 2325 return (B_TRUE); 2326 } 2327 2328 static int 2329 ndmpd_zfs_snapname_create(ndmpd_zfs_args_t *ndmpd_zfs_args, 2330 char *snapname, int namelen) 2331 { 2332 char subprop[ZFS_MAXPROPLEN]; 2333 struct timeval tp; 2334 int err = 0; 2335 2336 (void) ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args, 2337 subprop, ZFS_MAXPROPLEN, B_FALSE); 2338 2339 (void) gettimeofday(&tp, NULL); 2340 2341 err = snprintf(snapname, namelen, 2342 "ndmp.%s.%ld.%ld", 2343 subprop, 2344 tp.tv_sec, 2345 tp.tv_usec); 2346 2347 if (err > namelen) { 2348 NDMP_LOG(LOG_ERR, "name of snapshot [%s...] would exceed %d", 2349 snapname, namelen); 2350 return (-1); 2351 } 2352 2353 return (0); 2354 } 2355 2356 static void 2357 ndmpd_zfs_zerr_dma_log(ndmpd_zfs_args_t *ndmpd_zfs_args) 2358 { 2359 switch (libzfs_errno(ndmpd_zfs_args->nz_zlibh)) { 2360 case EZFS_EXISTS: 2361 case EZFS_BUSY: 2362 case EZFS_NOENT: 2363 case EZFS_INVALIDNAME: 2364 case EZFS_MOUNTFAILED: 2365 case EZFS_UMOUNTFAILED: 2366 case EZFS_NAMETOOLONG: 2367 case EZFS_BADRESTORE: 2368 2369 /* use existing error text */ 2370 2371 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2372 "%s: %s: %s\n", 2373 ndmpd_zfs_args->nz_dataset, 2374 libzfs_error_action(ndmpd_zfs_args->nz_zlibh), 2375 libzfs_error_description(ndmpd_zfs_args->nz_zlibh)); 2376 2377 break; 2378 2379 case EZFS_NOMEM: 2380 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2381 "Unable to obtain memory for operation\n"); 2382 break; 2383 2384 case EZFS_PROPSPACE: 2385 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2386 "A bad ZFS quota or reservation was encountered.\n"); 2387 break; 2388 2389 case EZFS_BADSTREAM: 2390 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2391 "The backup stream is invalid.\n"); 2392 break; 2393 2394 case EZFS_ZONED: 2395 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2396 "An error related to the local zone occurred.\n"); 2397 break; 2398 2399 case EZFS_NOSPC: 2400 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2401 "No more space is available\n"); 2402 break; 2403 2404 case EZFS_IO: 2405 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2406 "An I/O error occurred.\n"); 2407 break; 2408 2409 default: 2410 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2411 "An internal ndmpd error occurred. " 2412 "Please contact support\n"); 2413 break; 2414 } 2415 } 2416 2417 void 2418 ndmpd_zfs_dma_log(ndmpd_zfs_args_t *ndmpd_zfs_args, ndmp_log_type log_type, 2419 char *format, ...) 2420 { 2421 static char buf[1024]; 2422 va_list ap; 2423 2424 va_start(ap, format); 2425 2426 /*LINTED variable format specifier */ 2427 (void) vsnprintf(buf, sizeof (buf), format, ap); 2428 va_end(ap); 2429 2430 MOD_LOGV3(ndmpd_zfs_params, log_type, buf); 2431 2432 if ((log_type) == NDMP_LOG_ERROR) { 2433 NDMP_LOG(LOG_ERR, buf); 2434 } else { 2435 NDMP_LOG(LOG_NOTICE, buf); 2436 } 2437 } 2438