1 /* 2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2011, 2015 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_MAX_DATASET_NAME_LEN]; /* 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 NULL, &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_MAX_DATASET_NAME_LEN]; 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, 1081 ZFS_MAX_DATASET_NAME_LEN); 1082 1083 if (err != 0) { 1084 NDMP_LOG(LOG_DEBUG, "error getting bkup path: %d", err); 1085 return (-1); 1086 } 1087 1088 err = ndmpd_zfs_restore_getpath(ndmpd_zfs_args); 1089 1090 if (err != 0) { 1091 NDMP_LOG(LOG_DEBUG, "error getting restore path: %d", err); 1092 return (-1); 1093 } 1094 1095 (void) memset(nctxp, 0, sizeof (ndmp_context_t)); 1096 nctxp->nc_ddata = (void *) session; 1097 nctxp->nc_params = ndmpd_zfs_params; 1098 1099 err = ndmp_pl->np_pre_restore(ndmp_pl, nctxp, bkpath, 1100 ndmpd_zfs_args->nz_dataset); 1101 1102 if (err != 0) { 1103 NDMP_LOG(LOG_DEBUG, "Pre-restore plug-in: %m"); 1104 return (-1); 1105 } 1106 1107 return (0); 1108 } 1109 1110 int 1111 ndmpd_zfs_post_restore(ndmpd_zfs_args_t *ndmpd_zfs_args) 1112 { 1113 ndmp_context_t *nctxp = &ndmpd_zfs_args->nz_nctx; 1114 int err = 0; 1115 1116 if (ndmp_pl == NULL || ndmp_pl->np_post_restore == NULL) 1117 return (0); 1118 1119 err = ndmp_pl->np_post_restore(ndmp_pl, nctxp, err); 1120 1121 if (err == -1) 1122 NDMP_LOG(LOG_DEBUG, "Post-restore plug-in: %m"); 1123 1124 return (err); 1125 } 1126 1127 boolean_t 1128 ndmpd_zfs_backup_parms_valid(ndmpd_zfs_args_t *ndmpd_zfs_args) 1129 { 1130 ndmpd_zfs_snapfind_t snapdata; 1131 1132 if (ndmpd_zfs_backup_getenv(ndmpd_zfs_args) != 0) 1133 return (B_FALSE); 1134 1135 if (!ndmpd_zfs_backup_pathvalid(ndmpd_zfs_args)) 1136 return (B_FALSE); 1137 1138 if (ndmpd_zfs_is_incremental(ndmpd_zfs_args)) { 1139 (void) ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args, 1140 snapdata.nzs_findprop, ZFS_MAXPROPLEN, B_TRUE); 1141 1142 snapdata.nzs_snapname[0] = '\0'; 1143 snapdata.nzs_snapprop[0] = '\0'; 1144 1145 if (ndmpd_zfs_snapshot_find(ndmpd_zfs_args, &snapdata)) 1146 return (B_FALSE); 1147 1148 if (snapdata.nzs_snapname[0] == '\0') { /* not found */ 1149 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1150 "Snapshot for level %d does not exist\n", 1151 ndmpd_zfs_args->nz_level-1); 1152 return (B_FALSE); 1153 } 1154 1155 (void) strlcpy(ndmpd_zfs_args->nz_fromsnap, 1156 snapdata.nzs_snapname, ZFS_MAX_DATASET_NAME_LEN); 1157 } 1158 1159 return (B_TRUE); 1160 } 1161 1162 /* 1163 * ndmpd_zfs_backup_pathvalid() 1164 * 1165 * Make sure the path is of an existing dataset 1166 */ 1167 1168 static boolean_t 1169 ndmpd_zfs_backup_pathvalid(ndmpd_zfs_args_t *ndmpd_zfs_args) 1170 { 1171 char zpath[ZFS_MAX_DATASET_NAME_LEN]; 1172 char propstr[ZFS_MAXPROPLEN]; 1173 zfs_handle_t *zhp; 1174 zfs_type_t ztype = 0; 1175 int err; 1176 1177 if (ndmpd_zfs_backup_getpath(ndmpd_zfs_args, zpath, 1178 ZFS_MAX_DATASET_NAME_LEN) != 0) 1179 return (B_FALSE); 1180 1181 if (ndmpd_zfs_args->nz_snapname[0] != '\0') { 1182 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, zpath, 1183 ZFS_TYPE_SNAPSHOT); 1184 1185 if (!zhp) { 1186 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, 1187 "zfs_open (snap)"); 1188 ndmpd_zfs_args->nz_snapname[0] = '\0'; 1189 ndmpd_zfs_args->nz_dataset[0] = '\0'; 1190 return (B_FALSE); 1191 } 1192 1193 err = ndmpd_zfs_snapshot_prop_get(zhp, propstr); 1194 1195 zfs_close(zhp); 1196 1197 if (err) { 1198 NDMP_LOG(LOG_DEBUG, 1199 "ndmpd_zfs_snapshot_prop_get failed"); 1200 return (-1); 1201 } 1202 1203 if (propstr && ndmpd_zfs_snapshot_ndmpd_generated(propstr)) { 1204 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1205 "cannot use an ndmpd-generated snapshot\n"); 1206 return (B_FALSE); 1207 } 1208 } 1209 1210 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, 1211 ndmpd_zfs_args->nz_dataset, ZFS_TYPE_DATASET); 1212 1213 if (zhp) { 1214 ztype = zfs_get_type(zhp); 1215 zfs_close(zhp); 1216 } 1217 1218 if ((ztype == ZFS_TYPE_VOLUME) || 1219 (ztype == ZFS_TYPE_FILESYSTEM)) { 1220 ndmpd_zfs_args->nz_type = ztype; 1221 return (B_TRUE); 1222 } 1223 1224 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1225 "Invalid file system or volume.\n"); 1226 1227 return (B_FALSE); 1228 } 1229 1230 /* 1231 * ndmpd_zfs_backup_getpath() 1232 * 1233 * Retrieve the backup path from the environment, which should 1234 * be of the form "/dataset[@snap]". The leading slash is required 1235 * by certain DMA's but can otherwise be ignored. 1236 * 1237 * (Note: "dataset" can consist of more than one component, 1238 * e.g. "pool", "pool/volume", "pool/fs/fs2".) 1239 * 1240 * The dataset name and the snapshot name (if any) will be 1241 * stored in ndmpd_zfs_args. 1242 */ 1243 1244 static int 1245 ndmpd_zfs_backup_getpath(ndmpd_zfs_args_t *ndmpd_zfs_args, char *zpath, 1246 int zlen) 1247 { 1248 char *env_path; 1249 char *at; 1250 1251 env_path = get_backup_path_v3(ndmpd_zfs_params); 1252 if (env_path == NULL) 1253 return (-1); 1254 1255 if (env_path[0] != '/') { 1256 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1257 "Invalid path: %s (leading slash required)\n", env_path); 1258 return (-1); 1259 } 1260 1261 (void) strlcpy(zpath, &env_path[1], zlen); 1262 (void) strlcpy(ndmpd_zfs_args->nz_dataset, &env_path[1], 1263 ZFS_MAX_DATASET_NAME_LEN); 1264 1265 at = strchr(ndmpd_zfs_args->nz_dataset, '@'); 1266 if (at) { 1267 *at = '\0'; 1268 (void) strlcpy(ndmpd_zfs_args->nz_snapname, ++at, 1269 ZFS_MAX_DATASET_NAME_LEN); 1270 } else { 1271 ndmpd_zfs_args->nz_snapname[0] = '\0'; 1272 } 1273 1274 (void) trim_whitespace(ndmpd_zfs_args->nz_dataset); 1275 1276 return (0); 1277 } 1278 1279 static int 1280 ndmpd_zfs_backup_getenv(ndmpd_zfs_args_t *ndmpd_zfs_args) 1281 { 1282 return (ndmpd_zfs_getenv(ndmpd_zfs_args)); 1283 } 1284 1285 boolean_t 1286 ndmpd_zfs_restore_parms_valid(ndmpd_zfs_args_t *ndmpd_zfs_args) 1287 { 1288 if (ndmpd_zfs_restore_getenv(ndmpd_zfs_args) != 0) 1289 return (B_FALSE); 1290 1291 if (!ndmpd_zfs_restore_pathvalid(ndmpd_zfs_args)) 1292 return (B_FALSE); 1293 1294 return (B_TRUE); 1295 } 1296 1297 static boolean_t 1298 ndmpd_zfs_restore_pathvalid(ndmpd_zfs_args_t *ndmpd_zfs_args) 1299 { 1300 zfs_handle_t *zhp; 1301 char *at; 1302 1303 if (ndmpd_zfs_restore_getpath(ndmpd_zfs_args) != 0) 1304 return (B_FALSE); 1305 1306 at = strchr(ndmpd_zfs_args->nz_dataset, '@'); 1307 1308 if (at) { 1309 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_WARNING, 1310 "%s ignored in restore path\n", at); 1311 *at = '\0'; 1312 } 1313 1314 ndmpd_zfs_args->nz_type = ZFS_TYPE_VOLUME | ZFS_TYPE_FILESYSTEM; 1315 1316 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, 1317 ndmpd_zfs_args->nz_dataset, ndmpd_zfs_args->nz_type); 1318 1319 if (zhp) { 1320 zfs_close(zhp); 1321 1322 if (!ndmpd_zfs_is_incremental(ndmpd_zfs_args)) { 1323 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1324 "Restore dataset exists.\n" 1325 "A nonexistent dataset must be specified " 1326 "for 'zfs' non-incremental restore.\n"); 1327 return (B_FALSE); 1328 } 1329 } 1330 1331 NDMP_LOG(LOG_DEBUG, "restore path: %s\n", ndmpd_zfs_args->nz_dataset); 1332 1333 return (B_TRUE); 1334 } 1335 1336 /* 1337 * ndmpd_zfs_restore_getpath() 1338 * 1339 * Be sure to not include the leading slash, which is required for 1340 * compatibility with backup applications (NBU) but which is not part 1341 * of the ZFS syntax. (Note that this done explicitly in all paths 1342 * below except those calling ndmpd_zfs_backup_getpath(), because it is 1343 * already stripped in that function.) 1344 * 1345 * In addition, the DMA might add a trailing slash to the path. 1346 * Strip all such slashes. 1347 */ 1348 1349 static int 1350 ndmpd_zfs_restore_getpath(ndmpd_zfs_args_t *ndmpd_zfs_args) 1351 { 1352 int version = ndmpd_zfs_params->mp_protocol_version; 1353 char zpath[ZFS_MAX_DATASET_NAME_LEN]; 1354 mem_ndmp_name_v3_t *namep_v3; 1355 char *dataset = ndmpd_zfs_args->nz_dataset; 1356 char *nm; 1357 char *p; 1358 int len; 1359 int err; 1360 1361 namep_v3 = (mem_ndmp_name_v3_t *)MOD_GETNAME(ndmpd_zfs_params, 0); 1362 1363 if (namep_v3 == NULL) { 1364 NDMP_LOG(LOG_DEBUG, "Can't get Nlist[0]"); 1365 return (-1); 1366 } 1367 1368 if (namep_v3->nm3_dpath) { 1369 if (namep_v3->nm3_dpath[0] != '/') { 1370 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1371 "Invalid path: %s (leading slash required)\n", 1372 namep_v3->nm3_dpath); 1373 return (-1); 1374 } 1375 1376 (void) strlcpy(dataset, &(namep_v3->nm3_dpath[1]), 1377 ZFS_MAX_DATASET_NAME_LEN); 1378 1379 if (namep_v3->nm3_newnm) { 1380 (void) strlcat(dataset, "/", ZFS_MAX_DATASET_NAME_LEN); 1381 (void) strlcat(dataset, namep_v3->nm3_newnm, 1382 ZFS_MAX_DATASET_NAME_LEN); 1383 1384 } else { 1385 if (version == NDMPV3) { 1386 /* 1387 * The following does not apply for V4. 1388 * 1389 * Find the last component of nm3_opath. 1390 * nm3_opath has no trailing '/'. 1391 */ 1392 p = strrchr(namep_v3->nm3_opath, '/'); 1393 nm = p? p : namep_v3->nm3_opath; 1394 (void) strlcat(dataset, "/", 1395 ZFS_MAX_DATASET_NAME_LEN); 1396 (void) strlcat(dataset, nm, 1397 ZFS_MAX_DATASET_NAME_LEN); 1398 } 1399 } 1400 } else { 1401 err = ndmpd_zfs_backup_getpath(ndmpd_zfs_args, zpath, 1402 ZFS_MAX_DATASET_NAME_LEN); 1403 if (err) 1404 return (err); 1405 } 1406 1407 len = strlen(dataset); 1408 while (dataset[len-1] == '/') { 1409 dataset[len-1] = '\0'; 1410 len--; 1411 } 1412 1413 return (0); 1414 } 1415 1416 static int 1417 ndmpd_zfs_restore_getenv(ndmpd_zfs_args_t *ndmpd_zfs_args) 1418 { 1419 if (ndmpd_zfs_getenv_zfs_backup_size(ndmpd_zfs_args) != 0) 1420 return (-1); 1421 1422 return (ndmpd_zfs_getenv(ndmpd_zfs_args)); 1423 } 1424 1425 static int 1426 ndmpd_zfs_getenv(ndmpd_zfs_args_t *ndmpd_zfs_args) 1427 { 1428 1429 if (ndmpd_zfs_getenv_level(ndmpd_zfs_args) != 0) 1430 return (-1); 1431 1432 if (ndmpd_zfs_getenv_zfs_mode(ndmpd_zfs_args) != 0) 1433 return (-1); 1434 1435 if (ndmpd_zfs_getenv_zfs_force(ndmpd_zfs_args) != 0) 1436 return (-1); 1437 1438 if (ndmpd_zfs_getenv_update(ndmpd_zfs_args) != 0) 1439 return (-1); 1440 1441 if (ndmpd_zfs_getenv_dmp_name(ndmpd_zfs_args) != 0) 1442 return (-1); 1443 1444 return (0); 1445 } 1446 1447 static int 1448 ndmpd_zfs_getenv_zfs_mode(ndmpd_zfs_args_t *ndmpd_zfs_args) 1449 { 1450 char *envp; 1451 1452 envp = MOD_GETENV(ndmpd_zfs_params, "ZFS_MODE"); 1453 1454 if (envp == NULL) { 1455 NDMP_LOG(LOG_DEBUG, "env(ZFS_MODE) not specified, " 1456 "defaulting to recursive"); 1457 ndmpd_zfs_args->nz_zfs_mode = 'r'; 1458 return (0); 1459 } 1460 1461 if ((strcmp(envp, "dataset") == 0) || (strcmp(envp, "d") == 0)) { 1462 ndmpd_zfs_args->nz_zfs_mode = 'd'; 1463 } else if ((strcmp(envp, "recursive") == 0) || 1464 (strcmp(envp, "r") == 0)) { 1465 ndmpd_zfs_args->nz_zfs_mode = 'r'; 1466 } else if ((strcmp(envp, "package") == 0) || (strcmp(envp, "p") == 0)) { 1467 ndmpd_zfs_args->nz_zfs_mode = 'p'; 1468 } else { 1469 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1470 "Invalid ZFS_MODE value \"%s\".\n", envp); 1471 return (-1); 1472 } 1473 1474 NDMP_LOG(LOG_DEBUG, "env(ZFS_MODE): \"%c\"", 1475 ndmpd_zfs_args->nz_zfs_mode); 1476 1477 return (0); 1478 } 1479 1480 /* 1481 * ndmpd_zfs_getenv_zfs_force() 1482 * 1483 * If SMF property zfs-force-override is set to "yes" or "no", this 1484 * value will override any value of NDMP environment variable ZFS_FORCE 1485 * as set by the DMA admin (or override the default of 'n', if ZFS_FORCE 1486 * is not set). By default, zfs-force-override is "off", which means it 1487 * will not override ZFS_FORCE. 1488 */ 1489 1490 static int 1491 ndmpd_zfs_getenv_zfs_force(ndmpd_zfs_args_t *ndmpd_zfs_args) 1492 { 1493 char *envp_force; 1494 char *override; 1495 1496 override = ndmpd_get_prop(NDMP_ZFS_FORCE_OVERRIDE); 1497 1498 if (strcasecmp(override, "yes") == 0) { 1499 ndmpd_zfs_args->nz_zfs_force = B_TRUE; 1500 NDMP_LOG(LOG_NOTICE, 1501 "SMF property zfs-force-override set to 'yes', " 1502 "overriding ZFS_FORCE"); 1503 return (0); 1504 } 1505 1506 if (strcasecmp(override, "no") == 0) { 1507 ndmpd_zfs_args->nz_zfs_force = B_FALSE; 1508 NDMP_LOG(LOG_NOTICE, 1509 "SMF property zfs-force-override set to 'no', " 1510 "overriding ZFS_FORCE"); 1511 return (0); 1512 } 1513 1514 if (strcasecmp(override, "off") != 0) { 1515 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1516 "SMF property zfs-force-override set to invalid value of " 1517 "'%s'; treating it as 'off'.", override); 1518 } 1519 1520 envp_force = MOD_GETENV(ndmpd_zfs_params, "ZFS_FORCE"); 1521 1522 if (envp_force == NULL) { 1523 NDMP_LOG(LOG_DEBUG, 1524 "env(ZFS_FORCE) not specified, defaulting to FALSE"); 1525 ndmpd_zfs_args->nz_zfs_force = B_FALSE; 1526 return (0); 1527 } 1528 1529 /* 1530 * The value can be either 't' ("true" for v3) or 'y' ("yes" for v4). 1531 */ 1532 1533 if (strchr("tTyY", *envp_force)) 1534 ndmpd_zfs_args->nz_zfs_force = B_TRUE; 1535 1536 NDMP_LOG(LOG_DEBUG, "env(ZFS_FORCE): \"%s\"", envp_force); 1537 1538 return (0); 1539 } 1540 1541 static int 1542 ndmpd_zfs_getenv_level(ndmpd_zfs_args_t *ndmpd_zfs_args) 1543 { 1544 char *envp; 1545 1546 envp = MOD_GETENV(ndmpd_zfs_params, "LEVEL"); 1547 1548 if (envp == NULL) { 1549 NDMP_LOG(LOG_DEBUG, "env(LEVEL) not specified, " 1550 "defaulting to 0"); 1551 ndmpd_zfs_args->nz_level = 0; 1552 return (0); 1553 } 1554 1555 if (envp[1] != '\0') { 1556 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1557 "Invalid backup level \"%s\".\n", envp); 1558 return (-1); 1559 } 1560 1561 if (!isdigit(*envp)) { 1562 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1563 "Invalid backup level \"%s\".\n", envp); 1564 return (-1); 1565 } 1566 1567 ndmpd_zfs_args->nz_level = atoi(envp); 1568 1569 NDMP_LOG(LOG_DEBUG, "env(LEVEL): \"%d\"", 1570 ndmpd_zfs_args->nz_level); 1571 1572 return (0); 1573 } 1574 1575 static int 1576 ndmpd_zfs_getenv_update(ndmpd_zfs_args_t *ndmpd_zfs_args) 1577 { 1578 char *envp_update; 1579 1580 envp_update = MOD_GETENV(ndmpd_zfs_params, "UPDATE"); 1581 1582 if (envp_update == NULL) { 1583 NDMP_LOG(LOG_DEBUG, 1584 "env(UPDATE) not specified, defaulting to TRUE"); 1585 ndmpd_zfs_args->nz_update = B_TRUE; 1586 return (0); 1587 } 1588 1589 /* 1590 * The value can be either 't' ("true" for v3) or 'y' ("yes" for v4). 1591 */ 1592 1593 if (strchr("tTyY", *envp_update)) 1594 ndmpd_zfs_args->nz_update = B_TRUE; 1595 1596 NDMP_LOG(LOG_DEBUG, "env(UPDATE): \"%s\"", envp_update); 1597 1598 return (0); 1599 } 1600 1601 static int 1602 ndmpd_zfs_getenv_dmp_name(ndmpd_zfs_args_t *ndmpd_zfs_args) 1603 { 1604 char *envp; 1605 1606 envp = MOD_GETENV(ndmpd_zfs_params, "DMP_NAME"); 1607 1608 if (envp == NULL) { 1609 NDMP_LOG(LOG_DEBUG, 1610 "env(DMP_NAME) not specified, defaulting to 'level'"); 1611 (void) strlcpy(ndmpd_zfs_args->nz_dmp_name, "level", 1612 NDMPD_ZFS_DMP_NAME_MAX); 1613 return (0); 1614 } 1615 1616 if (!ndmpd_zfs_dmp_name_valid(ndmpd_zfs_args, envp)) 1617 return (-1); 1618 1619 (void) strlcpy(ndmpd_zfs_args->nz_dmp_name, envp, 1620 NDMPD_ZFS_DMP_NAME_MAX); 1621 1622 NDMP_LOG(LOG_DEBUG, "env(DMP_NAME): \"%s\"", envp); 1623 1624 return (0); 1625 } 1626 1627 static int 1628 ndmpd_zfs_getenv_zfs_backup_size(ndmpd_zfs_args_t *ndmpd_zfs_args) 1629 { 1630 char *zfs_backup_size; 1631 1632 zfs_backup_size = MOD_GETENV(ndmpd_zfs_params, "ZFS_BACKUP_SIZE"); 1633 1634 if (zfs_backup_size == NULL) { 1635 NDMP_LOG(LOG_ERR, "ZFS_BACKUP_SIZE env is NULL"); 1636 return (-1); 1637 } 1638 1639 NDMP_LOG(LOG_DEBUG, "ZFS_BACKUP_SIZE: %s\n", zfs_backup_size); 1640 1641 (void) sscanf(zfs_backup_size, "%llu", 1642 &ndmpd_zfs_args->nz_zfs_backup_size); 1643 1644 return (0); 1645 } 1646 1647 /* 1648 * ndmpd_zfs_dmp_name_valid() 1649 * 1650 * This function verifies that the dmp_name is valid. 1651 * 1652 * The dmp_name is restricted to alphanumeric characters plus 1653 * the underscore and hyphen, and must be 31 characters or less. 1654 * This is due to its use in the NDMPD_ZFS_PROP_INCR property 1655 * and in the ZFS snapshot name (if an ndmpd-generated snapshot 1656 * is required). 1657 */ 1658 1659 static boolean_t 1660 ndmpd_zfs_dmp_name_valid(ndmpd_zfs_args_t *ndmpd_zfs_args, char *dmp_name) 1661 { 1662 char *c; 1663 1664 if (strlen(dmp_name) >= NDMPD_ZFS_DMP_NAME_MAX) { 1665 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1666 "DMP_NAME %s is longer than %d\n", 1667 dmp_name, NDMPD_ZFS_DMP_NAME_MAX-1); 1668 return (B_FALSE); 1669 } 1670 1671 for (c = dmp_name; *c != '\0'; c++) { 1672 if (!isalpha(*c) && !isdigit(*c) && 1673 (*c != '_') && (*c != '-')) { 1674 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1675 "DMP_NAME %s contains illegal character %c\n", 1676 dmp_name, *c); 1677 return (B_FALSE); 1678 } 1679 } 1680 1681 NDMP_LOG(LOG_DEBUG, "DMP_NAME is valid: %s\n", dmp_name); 1682 return (B_TRUE); 1683 } 1684 1685 /* 1686 * ndmpd_zfs_is_incremental() 1687 * 1688 * This can only be called after ndmpd_zfs_getenv_level() 1689 * has been called. 1690 */ 1691 1692 static boolean_t 1693 ndmpd_zfs_is_incremental(ndmpd_zfs_args_t *ndmpd_zfs_args) 1694 { 1695 return (ndmpd_zfs_args->nz_level != 0); 1696 } 1697 1698 /* 1699 * ndmpd_zfs_snapshot_prepare() 1700 * 1701 * If no snapshot was supplied by the user, create a snapshot 1702 * for use by ndmpd. 1703 */ 1704 1705 static int 1706 ndmpd_zfs_snapshot_prepare(ndmpd_zfs_args_t *ndmpd_zfs_args) 1707 { 1708 ndmpd_session_t *session = (ndmpd_session_t *) 1709 (ndmpd_zfs_params->mp_daemon_cookie); 1710 boolean_t recursive = B_FALSE; 1711 int zfs_err = 0; 1712 1713 if (session->ns_data.dd_abort) { 1714 NDMP_LOG(LOG_DEBUG, "Backing up \"%s\" aborted.", 1715 ndmpd_zfs_args->nz_dataset); 1716 return (-1); 1717 } 1718 1719 if (ndmpd_zfs_args->nz_snapname[0] == '\0') { 1720 ndmpd_zfs_args->nz_ndmpd_snap = B_TRUE; 1721 1722 if (ndmpd_zfs_snapshot_create(ndmpd_zfs_args) != 0) { 1723 ndmpd_zfs_args->nz_snapname[0] = '\0'; 1724 1725 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1726 "Error creating snapshot for %s\n", 1727 ndmpd_zfs_args->nz_dataset); 1728 1729 return (-1); 1730 } 1731 } 1732 1733 if (ndmpd_zfs_snapshot_prop_add(ndmpd_zfs_args)) { 1734 NDMP_LOG(LOG_DEBUG, 1735 "ndmpd_zfs_snapshot_prop_add error\n"); 1736 1737 if (ndmpd_zfs_args->nz_ndmpd_snap) { 1738 1739 if (ndmpd_zfs_args->nz_zfs_mode != 'd') 1740 recursive = B_TRUE; 1741 1742 (void) snapshot_destroy(ndmpd_zfs_args->nz_dataset, 1743 ndmpd_zfs_args->nz_snapname, recursive, B_FALSE, 1744 &zfs_err); 1745 } 1746 1747 return (-1); 1748 } 1749 1750 return (0); 1751 } 1752 1753 /* 1754 * ndmpd_zfs_snapshot_cleanup() 1755 * 1756 * If UPDATE = y, find the old snapshot (if any) corresponding to 1757 * {LEVEL, DMP_NAME, ZFS_MODE}. If it was ndmpd-generated, 1758 * remove the snapshot. Otherwise, update its NDMPD_ZFS_PROP_INCR 1759 * property to remove {L, D, Z}. 1760 * 1761 * If UPDATE = n, if an ndmpd-generated snapshot was used for backup, 1762 * remove the snapshot. Otherwise, update its NDMPD_ZFS_PROP_INCR 1763 * property to remove {L, D, Z}. 1764 */ 1765 1766 static int 1767 ndmpd_zfs_snapshot_cleanup(ndmpd_zfs_args_t *ndmpd_zfs_args, int err) 1768 { 1769 ndmpd_session_t *session = (ndmpd_session_t *) 1770 (ndmpd_zfs_params->mp_daemon_cookie); 1771 ndmpd_zfs_snapfind_t snapdata; 1772 boolean_t ndmpd_generated = B_FALSE; 1773 1774 bzero(&snapdata, sizeof (ndmpd_zfs_snapfind_t)); 1775 1776 (void) ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args, 1777 snapdata.nzs_findprop, ZFS_MAXPROPLEN, B_FALSE); 1778 1779 if (ndmpd_zfs_args->nz_update && !session->ns_data.dd_abort && !err) { 1780 /* 1781 * Find the existing snapshot, if any, to "unuse." 1782 * Indicate that the current snapshot used for backup 1783 * should be skipped in the search. (The search is 1784 * sorted by creation time but this cannot be relied 1785 * upon for user-supplied snapshots.) 1786 */ 1787 1788 (void) snprintf(snapdata.nzs_snapskip, ZFS_MAX_DATASET_NAME_LEN, 1789 "%s", ndmpd_zfs_args->nz_snapname); 1790 1791 if (ndmpd_zfs_snapshot_find(ndmpd_zfs_args, &snapdata)) { 1792 NDMP_LOG(LOG_DEBUG, "ndmpd_zfs_snapshot_find error\n"); 1793 goto _remove_tmp_snap; 1794 } 1795 1796 if (snapdata.nzs_snapname[0] != '\0') { /* snapshot found */ 1797 ndmpd_generated = ndmpd_zfs_snapshot_ndmpd_generated 1798 (snapdata.nzs_snapprop); 1799 1800 if (ndmpd_zfs_snapshot_unuse(ndmpd_zfs_args, 1801 ndmpd_generated, &snapdata) != 0) { 1802 NDMP_LOG(LOG_DEBUG, 1803 "ndmpd_zfs_snapshot_unuse error\n"); 1804 goto _remove_tmp_snap; 1805 } 1806 } 1807 1808 if (session->ns_data.dd_abort) 1809 goto _remove_tmp_snap; 1810 1811 return (0); 1812 } 1813 1814 _remove_tmp_snap: 1815 1816 (void) snprintf(snapdata.nzs_snapname, ZFS_MAX_DATASET_NAME_LEN, "%s", 1817 ndmpd_zfs_args->nz_snapname); 1818 1819 (void) strlcpy(snapdata.nzs_snapprop, ndmpd_zfs_args->nz_snapprop, 1820 ZFS_MAXPROPLEN); 1821 1822 snapdata.nzs_snapskip[0] = '\0'; 1823 1824 if (ndmpd_zfs_snapshot_unuse(ndmpd_zfs_args, 1825 ndmpd_zfs_args->nz_ndmpd_snap, &snapdata) != 0) { 1826 NDMP_LOG(LOG_DEBUG, "ndmpd_zfs_snapshot_unuse error\n"); 1827 return (-1); 1828 } 1829 1830 if (!ndmpd_zfs_args->nz_update) 1831 return (0); 1832 1833 return (-1); 1834 } 1835 1836 static int 1837 ndmpd_zfs_snapshot_create(ndmpd_zfs_args_t *ndmpd_zfs_args) 1838 { 1839 boolean_t recursive = B_FALSE; 1840 1841 if (ndmpd_zfs_snapname_create(ndmpd_zfs_args, 1842 ndmpd_zfs_args->nz_snapname, ZFS_MAX_DATASET_NAME_LEN - 1) < 0) { 1843 NDMP_LOG(LOG_ERR, "Error (%d) creating snapshot name for %s", 1844 errno, ndmpd_zfs_args->nz_dataset); 1845 return (-1); 1846 } 1847 1848 if (ndmpd_zfs_args->nz_zfs_mode != 'd') 1849 recursive = B_TRUE; 1850 1851 if (snapshot_create(ndmpd_zfs_args->nz_dataset, 1852 ndmpd_zfs_args->nz_snapname, recursive, B_FALSE) != 0) { 1853 NDMP_LOG(LOG_ERR, "could not create snapshot %s@%s", 1854 ndmpd_zfs_args->nz_dataset, ndmpd_zfs_args->nz_snapname); 1855 return (-1); 1856 } 1857 1858 NDMP_LOG(LOG_DEBUG, "created snapshot %s@%s", 1859 ndmpd_zfs_args->nz_dataset, ndmpd_zfs_args->nz_snapname); 1860 1861 return (0); 1862 } 1863 1864 /* 1865 * ndmpd_zfs_snapshot_unuse() 1866 * 1867 * Given a pre-existing snapshot of the given {L, D, Z}: 1868 * If snapshot is ndmpd-generated, remove snapshot. 1869 * If not ndmpd-generated, or if the ndmpd-generated snapshot 1870 * cannot be destroyed, remove the {L, D, Z} substring from the 1871 * snapshot's NDMPD_ZFS_PROP_INCR property. 1872 * 1873 * In the event of a failure, it may be that two snapshots will 1874 * have the {L, D, Z} property set on them. This is not desirable, 1875 * so return an error and log the failure. 1876 */ 1877 1878 static int 1879 ndmpd_zfs_snapshot_unuse(ndmpd_zfs_args_t *ndmpd_zfs_args, 1880 boolean_t ndmpd_generated, ndmpd_zfs_snapfind_t *snapdata_p) 1881 { 1882 boolean_t recursive = B_FALSE; 1883 int zfs_err = 0; 1884 int err = 0; 1885 1886 if (ndmpd_generated) { 1887 if (ndmpd_zfs_args->nz_zfs_mode != 'd') 1888 recursive = B_TRUE; 1889 1890 err = snapshot_destroy(ndmpd_zfs_args->nz_dataset, 1891 snapdata_p->nzs_snapname, recursive, B_FALSE, &zfs_err); 1892 1893 if (err) { 1894 NDMP_LOG(LOG_ERR, "snapshot_destroy: %s@%s;" 1895 " err: %d; zfs_err: %d", 1896 ndmpd_zfs_args->nz_dataset, 1897 snapdata_p->nzs_snapname, err, zfs_err); 1898 return (-1); 1899 } 1900 } 1901 1902 if (!ndmpd_generated || zfs_err) { 1903 if (ndmpd_zfs_snapshot_prop_remove(ndmpd_zfs_args, snapdata_p)) 1904 return (-1); 1905 } 1906 1907 return (0); 1908 } 1909 1910 static boolean_t 1911 ndmpd_zfs_snapshot_ndmpd_generated(char *snapprop) 1912 { 1913 char origin; 1914 1915 (void) sscanf(snapprop, "%*u.%*u.%c%*s", &origin); 1916 1917 return (origin == 'n'); 1918 } 1919 1920 /* 1921 * ndmpd_zfs_snapshot_find() 1922 * 1923 * Find a snapshot with a particular value for 1924 * the NDMPD_ZFS_PROP_INCR property. 1925 */ 1926 1927 static int 1928 ndmpd_zfs_snapshot_find(ndmpd_zfs_args_t *ndmpd_zfs_args, 1929 ndmpd_zfs_snapfind_t *snapdata) 1930 { 1931 zfs_handle_t *zhp; 1932 int err; 1933 1934 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, ndmpd_zfs_args->nz_dataset, 1935 ndmpd_zfs_args->nz_type); 1936 1937 if (!zhp) { 1938 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_open"); 1939 return (-1); 1940 } 1941 1942 err = zfs_iter_snapshots_sorted(zhp, ndmpd_zfs_snapshot_prop_find, 1943 snapdata); 1944 1945 zfs_close(zhp); 1946 1947 if (err) { 1948 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_iter_snapshots: %d", 1949 err); 1950 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 1951 "Error iterating snapshots\n"); 1952 return (-1); 1953 } 1954 1955 return (0); 1956 } 1957 1958 /* 1959 * ndmpd_zfs_snapshot_prop_find() 1960 * 1961 * Find a snapshot with a particular value for 1962 * NDMPD_ZFS_PROP_INCR. Fill in data for the first one 1963 * found (sorted by creation time). However, skip the 1964 * the snapshot indicated in nzs_snapskip, if any. 1965 */ 1966 1967 static int 1968 ndmpd_zfs_snapshot_prop_find(zfs_handle_t *zhp, void *arg) 1969 { 1970 ndmpd_zfs_snapfind_t *snapdata_p = (ndmpd_zfs_snapfind_t *)arg; 1971 char propstr[ZFS_MAXPROPLEN]; 1972 char findprop_plus_slash[ZFS_MAXPROPLEN]; 1973 char *justsnap; 1974 int err = 0; 1975 1976 if (snapdata_p->nzs_snapname[0] != '\0') { 1977 NDMP_LOG(LOG_DEBUG, "no need to get prop for snapshot %s", 1978 (char *)zfs_get_name(zhp)); 1979 goto _done; 1980 } 1981 1982 err = ndmpd_zfs_snapshot_prop_get(zhp, propstr); 1983 1984 if (err) { 1985 NDMP_LOG(LOG_DEBUG, "ndmpd_zfs_snapshot_prop_get failed"); 1986 goto _done; 1987 } 1988 1989 if (propstr[0] == '\0') { 1990 NDMP_LOG(LOG_DEBUG, "snapshot %s: propr not set", 1991 (char *)zfs_get_name(zhp)); 1992 goto _done; 1993 } 1994 1995 (void) snprintf(findprop_plus_slash, ZFS_MAXPROPLEN, "/%s", 1996 snapdata_p->nzs_findprop); 1997 1998 if (!strstr((const char *)propstr, 1999 (const char *)findprop_plus_slash)) { 2000 NDMP_LOG(LOG_DEBUG, "snapshot %s: property %s (%s not found)", 2001 (char *)zfs_get_name(zhp), propstr, 2002 snapdata_p->nzs_findprop); 2003 goto _done; 2004 } 2005 2006 if (!ndmpd_zfs_prop_version_check(propstr, 2007 &snapdata_p->nzs_prop_major, &snapdata_p->nzs_prop_minor)) { 2008 NDMP_LOG(LOG_DEBUG, "snapshot %s: property %s (%s found)", 2009 (char *)zfs_get_name(zhp), propstr, 2010 snapdata_p->nzs_findprop); 2011 NDMP_LOG(LOG_DEBUG, "did not pass version check"); 2012 goto _done; 2013 } 2014 2015 justsnap = strchr(zfs_get_name(zhp), '@') + 1; 2016 2017 if (strcmp(justsnap, snapdata_p->nzs_snapskip) != 0) { 2018 (void) strlcpy(snapdata_p->nzs_snapname, justsnap, 2019 ZFS_MAX_DATASET_NAME_LEN); 2020 2021 (void) strlcpy(snapdata_p->nzs_snapprop, propstr, 2022 ZFS_MAXPROPLEN); 2023 2024 NDMP_LOG(LOG_DEBUG, "found match: %s [%s]\n", 2025 snapdata_p->nzs_snapname, snapdata_p->nzs_snapprop); 2026 } 2027 2028 _done: 2029 zfs_close(zhp); 2030 return (err); 2031 } 2032 2033 /* 2034 * ndmpd_zfs_snapshot_prop_get() 2035 * 2036 * Retrieve NDMPD_ZFS_PROP_INCR property from snapshot 2037 */ 2038 2039 static int 2040 ndmpd_zfs_snapshot_prop_get(zfs_handle_t *zhp, char *propstr) 2041 { 2042 nvlist_t *userprop; 2043 nvlist_t *propval; 2044 char *strval; 2045 int err; 2046 2047 propstr[0] = '\0'; 2048 2049 userprop = zfs_get_user_props(zhp); 2050 2051 if (userprop == NULL) 2052 return (0); 2053 2054 err = nvlist_lookup_nvlist(userprop, NDMPD_ZFS_PROP_INCR, &propval); 2055 2056 if (err != 0) { 2057 if (err == ENOENT) 2058 return (0); 2059 2060 NDMP_LOG(LOG_DEBUG, "nvlist_lookup_nvlist error: %d\n", err); 2061 2062 return (-1); 2063 } 2064 2065 err = nvlist_lookup_string(propval, ZPROP_VALUE, &strval); 2066 2067 if (err != 0) { 2068 if (err == ENOENT) 2069 return (0); 2070 2071 NDMP_LOG(LOG_DEBUG, "nvlist_lookup_string error: %d\n", err); 2072 2073 return (-1); 2074 } 2075 2076 (void) strlcpy(propstr, strval, ZFS_MAXPROPLEN); 2077 2078 return (0); 2079 } 2080 2081 /* 2082 * ndmpd_zfs_snapshot_prop_add() 2083 * 2084 * Update snapshot's NDMPD_ZFS_PROP_INCR property with 2085 * the current LEVEL, DMP_NAME, and ZFS_MODE values 2086 * (add property if it doesn't exist) 2087 */ 2088 2089 static int 2090 ndmpd_zfs_snapshot_prop_add(ndmpd_zfs_args_t *ndmpd_zfs_args) 2091 { 2092 char fullname[ZFS_MAX_DATASET_NAME_LEN]; 2093 char propstr[ZFS_MAXPROPLEN]; 2094 zfs_handle_t *zhp; 2095 boolean_t set; 2096 int err; 2097 2098 (void) snprintf(fullname, ZFS_MAX_DATASET_NAME_LEN, "%s@%s", 2099 ndmpd_zfs_args->nz_dataset, 2100 ndmpd_zfs_args->nz_snapname); 2101 2102 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, fullname, ZFS_TYPE_SNAPSHOT); 2103 2104 if (!zhp) { 2105 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_open (snap)"); 2106 return (-1); 2107 } 2108 2109 bzero(propstr, ZFS_MAXPROPLEN); 2110 2111 if (ndmpd_zfs_snapshot_prop_get(zhp, propstr)) { 2112 NDMP_LOG(LOG_DEBUG, "error getting property"); 2113 zfs_close(zhp); 2114 return (-1); 2115 } 2116 2117 if (ndmpd_zfs_snapshot_prop_create(ndmpd_zfs_args, propstr, &set)) { 2118 zfs_close(zhp); 2119 return (-1); 2120 } 2121 2122 if (set) { 2123 err = zfs_prop_set(zhp, NDMPD_ZFS_PROP_INCR, propstr); 2124 if (err) { 2125 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_prop_set: %d", 2126 err); 2127 NDMP_LOG(LOG_ERR, "error setting property %s", 2128 propstr); 2129 zfs_close(zhp); 2130 return (-1); 2131 } 2132 } 2133 2134 zfs_close(zhp); 2135 2136 (void) strlcpy(ndmpd_zfs_args->nz_snapprop, propstr, ZFS_MAXPROPLEN); 2137 2138 return (0); 2139 } 2140 2141 static int 2142 ndmpd_zfs_snapshot_prop_create(ndmpd_zfs_args_t *ndmpd_zfs_args, 2143 char *propstr, boolean_t *set) 2144 { 2145 char subprop[ZFS_MAXPROPLEN]; 2146 char *p = propstr; 2147 int slash_count = 0; 2148 2149 *set = B_TRUE; 2150 2151 (void) ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args, 2152 subprop, ZFS_MAXPROPLEN, B_FALSE); 2153 2154 if (propstr[0] == '\0') { 2155 (void) snprintf(propstr, ZFS_MAXPROPLEN, "%u.%u.%c/%s", 2156 NDMPD_ZFS_PROP_MAJOR_VERSION, 2157 NDMPD_ZFS_PROP_MINOR_VERSION, 2158 (ndmpd_zfs_args->nz_ndmpd_snap) ? 'n' : 'u', 2159 subprop); 2160 return (0); 2161 } 2162 2163 if (strstr((const char *)propstr, (const char *)subprop)) { 2164 NDMP_LOG(LOG_DEBUG, "Did not add entry %s as it already exists", 2165 subprop); 2166 *set = B_FALSE; 2167 return (0); 2168 } 2169 2170 while (*p) { 2171 if (*(p++) == '/') 2172 slash_count++; 2173 } 2174 2175 if (slash_count >= NDMPD_ZFS_SUBPROP_MAX) { 2176 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2177 "snapshot %s: user property %s limit of %d subprops " 2178 "reached; cannot complete operation", 2179 ndmpd_zfs_args->nz_snapname, 2180 NDMPD_ZFS_PROP_INCR, 2181 NDMPD_ZFS_SUBPROP_MAX); 2182 return (-1); 2183 } 2184 2185 assert((strlen(propstr) + strlen(subprop) + 2) < ZFS_MAXPROPLEN); 2186 2187 (void) strlcat(propstr, "/", ZFS_MAXPROPLEN); 2188 (void) strlcat(propstr, subprop, ZFS_MAXPROPLEN); 2189 2190 return (0); 2191 } 2192 2193 static int 2194 ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args_t *ndmpd_zfs_args, 2195 char *subprop, int len, boolean_t prev_level) 2196 { 2197 return (snprintf(subprop, len, "%d.%s.%c", 2198 prev_level ? ndmpd_zfs_args->nz_level-1 : ndmpd_zfs_args->nz_level, 2199 ndmpd_zfs_args->nz_dmp_name, 2200 ndmpd_zfs_args->nz_zfs_mode)); 2201 } 2202 2203 /* 2204 * ndmpd_zfs_snapshot_prop_remove() 2205 * 2206 * Remove specified substring from the snapshot's 2207 * NDMPD_ZFS_PROP_INCR property 2208 */ 2209 2210 static int 2211 ndmpd_zfs_snapshot_prop_remove(ndmpd_zfs_args_t *ndmpd_zfs_args, 2212 ndmpd_zfs_snapfind_t *snapdata_p) 2213 { 2214 char findprop_plus_slash[ZFS_MAXPROPLEN]; 2215 char fullname[ZFS_MAX_DATASET_NAME_LEN]; 2216 char newprop[ZFS_MAXPROPLEN]; 2217 char tmpstr[ZFS_MAXPROPLEN]; 2218 zfs_handle_t *zhp; 2219 char *ptr; 2220 int err; 2221 2222 (void) snprintf(fullname, ZFS_MAX_DATASET_NAME_LEN, "%s@%s", 2223 ndmpd_zfs_args->nz_dataset, 2224 snapdata_p->nzs_snapname); 2225 2226 zhp = zfs_open(ndmpd_zfs_args->nz_zlibh, fullname, ZFS_TYPE_SNAPSHOT); 2227 2228 if (!zhp) { 2229 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_open"); 2230 return (-1); 2231 } 2232 2233 bzero(newprop, ZFS_MAXPROPLEN); 2234 2235 /* 2236 * If the substring to be removed is the only {L, D, Z} 2237 * in the property, remove the entire property 2238 */ 2239 2240 tmpstr[0] = '\0'; 2241 2242 (void) sscanf(snapdata_p->nzs_snapprop, "%*u.%*u.%*c/%1023s", tmpstr); 2243 2244 if (strcmp(tmpstr, snapdata_p->nzs_findprop) == 0) { 2245 2246 err = zfs_prop_set(zhp, NDMPD_ZFS_PROP_INCR, newprop); 2247 2248 zfs_close(zhp); 2249 2250 if (err) { 2251 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_prop_set: %d", 2252 err); 2253 NDMP_LOG(LOG_ERR, "error setting property %s", newprop); 2254 return (-1); 2255 } 2256 2257 return (0); 2258 } 2259 2260 (void) snprintf(findprop_plus_slash, ZFS_MAXPROPLEN, "/%s", 2261 snapdata_p->nzs_findprop); 2262 2263 ptr = strstr((const char *)snapdata_p->nzs_snapprop, 2264 (const char *)findprop_plus_slash); 2265 2266 if (ptr == NULL) { 2267 /* 2268 * This shouldn't happen. Just return success. 2269 */ 2270 zfs_close(zhp); 2271 2272 return (0); 2273 } 2274 2275 /* 2276 * Remove "nzs_findprop" substring from property 2277 * 2278 * Example property: 2279 * 0.0.u/1.bob.p/0.jane.d 2280 * 2281 * Note that there will always be a prefix to the 2282 * strstr() result. Hence the below code works for 2283 * all cases. 2284 */ 2285 2286 ptr--; 2287 (void) strncpy(newprop, snapdata_p->nzs_snapprop, 2288 (char *)ptr - snapdata_p->nzs_snapprop); 2289 ptr += strlen(snapdata_p->nzs_findprop) + 1; 2290 (void) strlcat(newprop, ptr, ZFS_MAXPROPLEN); 2291 2292 err = zfs_prop_set(zhp, NDMPD_ZFS_PROP_INCR, newprop); 2293 2294 zfs_close(zhp); 2295 2296 if (err) { 2297 NDMPD_ZFS_LOG_ZERR(ndmpd_zfs_args, "zfs_prop_set: %d", err); 2298 NDMP_LOG(LOG_ERR, "error modifying property %s", newprop); 2299 return (-1); 2300 } 2301 2302 return (0); 2303 } 2304 2305 static boolean_t 2306 ndmpd_zfs_prop_version_check(char *propstr, uint32_t *major, uint32_t *minor) 2307 { 2308 (void) sscanf(propstr, "%u.%u.%*c%*s", major, minor); 2309 2310 if (*major > NDMPD_ZFS_PROP_MAJOR_VERSION) { 2311 NDMP_LOG(LOG_ERR, "unsupported prop major (%u > %u)", 2312 *major, NDMPD_ZFS_PROP_MAJOR_VERSION); 2313 return (B_FALSE); 2314 } 2315 2316 if (*minor > NDMPD_ZFS_PROP_MINOR_VERSION) { 2317 NDMP_LOG(LOG_ERR, "later prop minor (%u > %u)", 2318 *minor, NDMPD_ZFS_PROP_MINOR_VERSION); 2319 } 2320 2321 NDMP_LOG(LOG_DEBUG, "passed version check: " 2322 "supported prop major (%u <= %u); (snapprop minor: %u [%u])", 2323 *major, NDMPD_ZFS_PROP_MAJOR_VERSION, 2324 *minor, NDMPD_ZFS_PROP_MINOR_VERSION); 2325 2326 return (B_TRUE); 2327 } 2328 2329 static int 2330 ndmpd_zfs_snapname_create(ndmpd_zfs_args_t *ndmpd_zfs_args, 2331 char *snapname, int namelen) 2332 { 2333 char subprop[ZFS_MAXPROPLEN]; 2334 struct timeval tp; 2335 int err = 0; 2336 2337 (void) ndmpd_zfs_prop_create_subprop(ndmpd_zfs_args, 2338 subprop, ZFS_MAXPROPLEN, B_FALSE); 2339 2340 (void) gettimeofday(&tp, NULL); 2341 2342 err = snprintf(snapname, namelen, 2343 "ndmp.%s.%ld.%ld", 2344 subprop, 2345 tp.tv_sec, 2346 tp.tv_usec); 2347 2348 if (err > namelen) { 2349 NDMP_LOG(LOG_ERR, "name of snapshot [%s...] would exceed %d", 2350 snapname, namelen); 2351 return (-1); 2352 } 2353 2354 return (0); 2355 } 2356 2357 static void 2358 ndmpd_zfs_zerr_dma_log(ndmpd_zfs_args_t *ndmpd_zfs_args) 2359 { 2360 switch (libzfs_errno(ndmpd_zfs_args->nz_zlibh)) { 2361 case EZFS_EXISTS: 2362 case EZFS_BUSY: 2363 case EZFS_NOENT: 2364 case EZFS_INVALIDNAME: 2365 case EZFS_MOUNTFAILED: 2366 case EZFS_UMOUNTFAILED: 2367 case EZFS_NAMETOOLONG: 2368 case EZFS_BADRESTORE: 2369 2370 /* use existing error text */ 2371 2372 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2373 "%s: %s: %s\n", 2374 ndmpd_zfs_args->nz_dataset, 2375 libzfs_error_action(ndmpd_zfs_args->nz_zlibh), 2376 libzfs_error_description(ndmpd_zfs_args->nz_zlibh)); 2377 2378 break; 2379 2380 case EZFS_NOMEM: 2381 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2382 "Unable to obtain memory for operation\n"); 2383 break; 2384 2385 case EZFS_PROPSPACE: 2386 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2387 "A bad ZFS quota or reservation was encountered.\n"); 2388 break; 2389 2390 case EZFS_BADSTREAM: 2391 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2392 "The backup stream is invalid.\n"); 2393 break; 2394 2395 case EZFS_ZONED: 2396 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2397 "An error related to the local zone occurred.\n"); 2398 break; 2399 2400 case EZFS_NOSPC: 2401 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2402 "No more space is available\n"); 2403 break; 2404 2405 case EZFS_IO: 2406 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2407 "An I/O error occurred.\n"); 2408 break; 2409 2410 default: 2411 ndmpd_zfs_dma_log(ndmpd_zfs_args, NDMP_LOG_ERROR, 2412 "An internal ndmpd error occurred. " 2413 "Please contact support\n"); 2414 break; 2415 } 2416 } 2417 2418 void 2419 ndmpd_zfs_dma_log(ndmpd_zfs_args_t *ndmpd_zfs_args, ndmp_log_type log_type, 2420 char *format, ...) 2421 { 2422 static char buf[1024]; 2423 va_list ap; 2424 2425 va_start(ap, format); 2426 2427 /*LINTED variable format specifier */ 2428 (void) vsnprintf(buf, sizeof (buf), format, ap); 2429 va_end(ap); 2430 2431 MOD_LOGV3(ndmpd_zfs_params, log_type, buf); 2432 2433 if ((log_type) == NDMP_LOG_ERROR) { 2434 NDMP_LOG(LOG_ERR, buf); 2435 } else { 2436 NDMP_LOG(LOG_NOTICE, buf); 2437 } 2438 } 2439