1 /* 2 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 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 #ifndef _TLM_H_ 40 #define _TLM_H_ 41 42 #include <sys/types.h> 43 #include <synch.h> 44 #include <limits.h> 45 #include <cstack.h> 46 #include <sys/acl.h> 47 #include <stdio.h> 48 #include <errno.h> 49 #include <fcntl.h> 50 #include <strings.h> 51 #include <sys/stat.h> 52 #include <time.h> 53 #include <sys/queue.h> 54 #include <sys/fs/zfs.h> 55 #include <libzfs.h> 56 57 #define IS_SET(f, m) (((f) & (m)) != 0) 58 59 #define TLM_MAX_BACKUP_JOB_NAME 32 /* max size of a job's name */ 60 #define TLM_TAPE_BUFFERS 10 /* number of rotating tape buffers */ 61 #define TLM_LINE_SIZE 128 /* size of text messages */ 62 63 64 #define TLM_BACKUP_RUN 0x00000001 65 #define TLM_RESTORE_RUN 0x00000002 66 #define TLM_STOP 0x00000009 /* graceful stop */ 67 #define TLM_ABORT 0x99999999 /* abandon the run */ 68 69 #define TLM_EXTRA_SPACE 64 70 #define TLM_MAX_PATH_NAME (PATH_MAX + TLM_EXTRA_SPACE) 71 72 #define ENTRYTYPELEN 14 73 #define PERMS 4 74 #define ID_STR_MAX 20 75 #define APPENDED_ID_MAX (ID_STR_MAX + 1) 76 #define ACL_ENTRY_SIZE (ENTRYTYPELEN + ID_STR_MAX + PERMS + APPENDED_ID_MAX) 77 #define TLM_MAX_ACL_TXT MAX_ACL_ENTRIES * ACL_ENTRY_SIZE 78 79 80 /* operation flags */ 81 #define TLM_OP_CHOOSE_ARCHIVE 0x00000001 /* look for archive bit */ 82 83 /* 84 * Synchronization flags used when launching the TLM threads. 85 */ 86 #define TLM_TAPE_READER 0x00000001 87 #define TLM_TAPE_WRITER 0x00000002 88 #define TLM_SOCK_READER 0x00000004 89 #define TLM_SOCK_WRITER 0x00000008 90 #define TLM_BUF_READER 0x00000010 91 #define TLM_BUF_WRITER 0x00000020 92 #define TLM_TAR_READER 0x00000040 93 #define TLM_TAR_WRITER 0x00000080 94 95 #define SCSI_SERIAL_PAGE 0x80 96 #define SCSI_DEVICE_IDENT_PAGE 0x83 97 #define SCMD_READ_ELEMENT_STATUS 0xB8 98 99 #define OCTAL7CHAR 07777777 100 #define SYSATTR_RDONLY "SUNWattr_ro" 101 #define SYSATTR_RW "SUNWattr_rw" 102 103 typedef int (*func_t)(); 104 105 typedef struct scsi_serial { 106 int sr_flags; 107 char sr_num[16]; 108 } scsi_serial_t; 109 110 typedef struct fs_fhandle { 111 int fh_fid; 112 char *fh_fpath; 113 } fs_fhandle_t; 114 115 typedef struct scsi_link { 116 struct scsi_link *sl_next; 117 struct scsi_link *sl_prev; 118 struct scsi_adapter *sl_sa; 119 unsigned int sl_sid; 120 unsigned int sl_lun; 121 unsigned int sl_requested_max_active; 122 unsigned int sl_granted_max_active; 123 unsigned int sl_n_active; 124 unsigned int sl_type; /* SCSI device type */ 125 } scsi_link_t; 126 127 typedef struct scsi_adapter { 128 struct scsi_adapter *sa_next; 129 char sa_name[16]; 130 struct scsi_link sa_link_head; 131 } scsi_adapter_t; 132 133 typedef struct sasd_drive { 134 char sd_name[256]; 135 char sd_vendor[8 + 1]; 136 char sd_id[16 + 1]; 137 char sd_rev[4 + 1]; 138 char sd_serial[16 + 1]; 139 char sd_wwn[32 + 1]; 140 } sasd_drive_t; 141 142 typedef struct scsi_sasd_drive { 143 sasd_drive_t ss_sd; 144 scsi_link_t ss_slink; 145 } scsi_sasd_drive_t; 146 147 148 #define DEFAULT_SLINK_MAX_XFER (64*1024) 149 150 typedef struct tlm_info { 151 int ti_init_done; /* initialization done ? */ 152 int ti_library_count; /* number of libraries */ 153 struct tlm_library *ti_library; /* first in chain */ 154 struct tlm_chain_link *ti_job_stats; /* chain of job statistics */ 155 } tlm_info_t; 156 157 typedef struct tlm_chain_link { 158 struct tlm_chain_link *tc_next; /* next blob of statistics */ 159 struct tlm_chain_link *tc_prev; /* previous blob in the chain */ 160 int tc_ref_count; /* number of routines */ 161 void *tc_data; /* the data blob */ 162 } tlm_chain_link_t; 163 164 typedef struct tlm_robot { 165 struct tlm_robot *tr_next; 166 struct tlm_library *tr_library; 167 int tr_number; 168 } tlm_robot_t; 169 170 typedef struct tlm_drive { 171 struct tlm_drive *td_next; 172 struct tlm_library *td_library; 173 char td_job_name[TLM_MAX_BACKUP_JOB_NAME]; 174 int td_number; /* number of this tape drive */ 175 int td_element; /* the library's number for the drive */ 176 struct scsi_link *td_slink; /* because the drive may be connected */ 177 /* to a different SCSI card than the */ 178 /* library */ 179 short td_scsi_id; 180 short td_lun; 181 short td_volume_number; /* for current job */ 182 /* an index into the tape set */ 183 int td_fd; /* I/O file descriptor */ 184 int td_errno; /* system error number */ 185 long td_exists : 1; 186 187 } tlm_drive_t; 188 189 typedef struct tlm_slot { 190 struct tlm_slot *ts_next; 191 struct tlm_library *ts_library; 192 int ts_number; /* number of this slot */ 193 int ts_element; 194 short ts_use_count; /* number of times used since loaded */ 195 long ts_status_full : 1; 196 } tlm_slot_t; 197 198 typedef struct tlm_library { 199 struct tlm_library *tl_next; 200 int tl_number; /* number of this tape library */ 201 long tl_capability_robot : 1, 202 tl_capability_door : 1, 203 tl_capability_lock : 1, 204 tl_capability_slots : 1, 205 tl_capability_export : 1, 206 tl_capability_drives : 1, 207 tl_capability_barcodes : 1, 208 tl_ghost_drives : 1; 209 /* 210 * "ghost_drives" is used to make sure that 211 * all drives claimed by the library really 212 * exist ... libraries have been known to lie. 213 */ 214 struct scsi_link *tl_slink; 215 216 int tl_robot_count; 217 tlm_robot_t *tl_robot; 218 int tl_drive_count; 219 tlm_drive_t *tl_drive; 220 int tl_slot_count; 221 tlm_slot_t *tl_slot; 222 } tlm_library_t; 223 224 typedef struct { 225 #ifdef _BIG_ENDIAN 226 uint8_t di_peripheral_qual : 3, 227 di_peripheral_dev_type : 5; 228 uint8_t di_page_code; 229 uint16_t di_page_length; 230 #else 231 uint8_t di_peripheral_dev_type : 5, 232 di_peripheral_qual : 3; 233 uint8_t di_page_code; 234 uint16_t di_page_length; 235 #endif 236 } device_ident_header_t; 237 238 typedef struct { 239 #ifdef _BIG_ENDIAN 240 uint8_t ni_proto_ident : 4, 241 ni_code_set : 4; 242 243 uint8_t ni_PIV : 1, 244 : 1, 245 ni_asso : 2, 246 ni_ident_type : 4; 247 248 uint8_t ni_reserved; 249 uint8_t ni_ident_length; 250 #else 251 uint8_t ni_code_set : 4, 252 ni_proto_ident : 4; 253 254 uint8_t ni_ident_type : 4, 255 ni_asso : 2, 256 : 1, 257 ni_PIV : 1; 258 uint8_t ni_reserved; 259 uint8_t ni_ident_length; 260 #endif 261 } name_ident_t; 262 263 #define TLM_NO_ERRORS 0x00000000 264 #define TLM_ERROR_BUSY 0x00000001 265 #define TLM_ERROR_INTERNAL 0x00000002 266 #define TLM_ERROR_NO_ROBOTS 0x00000003 267 #define TLM_TIMEOUT 0x00000004 268 #define TLM_ERROR_RANGE 0x00000005 269 #define TLM_EMPTY 0x00000006 270 #define TLM_DRIVE_NOT_ASSIGNED 0x00000007 271 #define TLM_NO_TAPE_NAME 0x00000008 272 #define TLM_NO_BACKUP_DIR 0x00000009 273 #define TLM_NO_BACKUP_HARDWARE 0x0000000a 274 #define TLM_NO_SOURCE_FILE 0x0000000b 275 #define TLM_NO_FREE_TAPES 0x0000000c 276 #define TLM_EOT 0x0000000d 277 #define TLM_SERIAL_NOT_FOUND 0x0000000e 278 #define TLM_SMALL_READ 0x0000000f 279 #define TLM_NO_RESTORE_FILE 0x00000010 280 #define TLM_EOF 0x00000011 281 #define TLM_NO_DIRECTORY 0x00000012 282 #define TLM_NO_MEMORY 0x00000013 283 #define TLM_WRITE_ERROR 0x00000014 284 #define TLM_NO_SCRATCH_SPACE 0x00000015 285 #define TLM_INVALID 0x00000016 286 #define TLM_MOVE 0x00000017 287 #define TLM_SKIP 0x00000018 288 #define TLM_OPEN_ERR 0x00000019 289 290 291 #define TLM_MAX_TAPE_DRIVES 16 292 #define TLM_NAME_SIZE 100 293 #define TLM_MAX_TAR_IMAGE 017777777770 294 295 #define TLM_VOLNAME_MAX_LENGTH 255 296 #define NAME_MAX 255 297 298 #define TLM_MAGIC "ustar " 299 #define TLM_SNAPSHOT_PREFIX ".zfs" 300 #define TLM_SNAPSHOT_DIR ".zfs/snapshot" 301 302 #define RECORDSIZE 512 303 #define NAMSIZ 100 304 305 typedef struct tlm_tar_hdr { 306 char th_name[TLM_NAME_SIZE]; 307 char th_mode[8]; 308 char th_uid[8]; 309 char th_gid[8]; 310 char th_size[12]; 311 char th_mtime[12]; 312 char th_chksum[8]; 313 char th_linkflag; 314 char th_linkname[TLM_NAME_SIZE]; 315 char th_magic[8]; 316 char th_uname[32]; 317 char th_gname[32]; 318 union { 319 struct { 320 char th_devmajor[8]; 321 char th_devminor[8]; 322 } th_dev; 323 char th_hlink_ino[12]; 324 } th_shared; 325 } tlm_tar_hdr_t; 326 327 328 329 /* 330 * The linkflag defines the type of file 331 */ 332 #define LF_OLDNORMAL '\0' /* Normal disk file, Unix compat */ 333 #define LF_NORMAL '0' /* Normal disk file */ 334 #define LF_LINK '1' /* Link to previously dumped file */ 335 #define LF_SYMLINK '2' /* Symbolic link */ 336 #define LF_CHR '3' /* Character special file */ 337 #define LF_BLK '4' /* Block special file */ 338 #define LF_DIR '5' /* Directory */ 339 #define LF_FIFO '6' /* FIFO special file */ 340 #define LF_CONTIG '7' /* Contiguous file */ 341 /* Further link types may be defined later. */ 342 343 #define LF_DUMPDIR 'D' 344 /* 345 * This is a dir entry that contains 346 * the names of files that were in 347 * the dir at the time the dump 348 * was made 349 */ 350 #define LF_HUMONGUS 'H' 351 /* 352 * Identifies the NEXT file on the tape 353 * as a HUGE file 354 */ 355 #define LF_LONGLINK 'K' 356 /* 357 * Identifies the NEXT file on the tape 358 * as having a long linkname 359 */ 360 #define LF_LONGNAME 'L' 361 /* 362 * Identifies the NEXT file on the tape 363 * as having a long name. 364 */ 365 #define LF_MULTIVOL 'M' 366 /* 367 * This is the continuation 368 * of a file that began on another 369 * volume 370 */ 371 372 #define LF_VOLHDR 'V' /* This file is a tape/volume header */ 373 /* Ignore it on extraction */ 374 375 #define LF_ACL 'A' /* Access Control List */ 376 377 #define LF_XATTR 'E' /* Extended attribute */ 378 379 #define KILOBYTE 1024 380 381 382 /* 383 * ACL support structure 384 */ 385 typedef struct sec_attr { 386 char attr_type; 387 char attr_len[7]; 388 char attr_info[TLM_MAX_ACL_TXT]; 389 } sec_attr_t; 390 391 typedef struct tlm_acls { 392 int acl_checkpointed : 1, /* are checkpoints active ? */ 393 acl_clear_archive : 1, /* clear archive bit ? */ 394 acl_overwrite : 1, /* always overwrite ? */ 395 acl_update : 1, /* only update ? */ 396 acl_non_trivial : 1; /* real ACLs? */ 397 /* 398 * The following fields are here to allow 399 * the backup reader to open a file one time 400 * and keep the information for ACL, ATTRs, 401 * and reading the file. 402 */ 403 sec_attr_t acl_info; 404 405 char acl_root_dir[TLM_VOLNAME_MAX_LENGTH]; /* name of root filesystem */ 406 fs_fhandle_t acl_dir_fh; /* parent dir's info */ 407 fs_fhandle_t acl_fil_fh; /* file's info */ 408 struct stat64 acl_attr; /* file system attributes */ 409 char uname[32]; 410 char gname[32]; 411 } tlm_acls_t; 412 413 414 /* 415 * Tape manager's data archiving ops vector 416 * 417 * This vector represents the granular operations for 418 * performing backup/restore. Each backend should provide 419 * such a vector interface in order to be invoked by NDMP 420 * server. 421 * The reserved callbacks are kept for different backup 422 * types which are volume-based rather than file-based 423 * e.g. zfs send. 424 */ 425 typedef struct tm_ops { 426 char *tm_name; 427 int (*tm_putfile)(); 428 int (*tm_putdir)(); 429 int (*tm_putvol)(); /* Reserved */ 430 void * (*tm_getfile)(void *); 431 int (*tm_getdir)(); 432 int (*tm_getvol)(); /* Reserved */ 433 } tm_ops_t; 434 435 /* The checksum field is filled with this while the checksum is computed. */ 436 #define CHKBLANKS " " /* 8 blanks, no null */ 437 438 #define LONGNAME_PREFIX "././_LoNg_NaMe_" 439 extern void ndmp_log(ulong_t, char *, char *, ...); 440 extern char ndmp_log_info[256]; 441 #define NDMP_LOG(p, ...) { \ 442 (void) snprintf(ndmp_log_info, \ 443 sizeof (ndmp_log_info), \ 444 "[%d][%s:%d]", \ 445 (int)pthread_self(), __func__, __LINE__); \ 446 ndmp_log(p, ndmp_log_info, __VA_ARGS__); \ 447 } 448 extern void *ndmp_malloc(size_t size); 449 450 /* 451 * ZFS metadata plug-in module structures 452 */ 453 #define ZFS_MAX_PROPS 100 454 #define ZFS_META_MAGIC "ZFSMETA" 455 #define ZFS_META_MAGIC_EXT "ZFSMETA2" 456 457 /* Add new major/minor for header changes */ 458 typedef enum { 459 META_HDR_MAJOR_0, /* Original format */ 460 META_HDR_MAJOR_1, /* Extended format */ 461 } ndmp_metadata_header_major_t; 462 463 #define META_HDR_MAJOR_VERSION META_HDR_MAJOR_1 464 465 typedef enum { 466 META_HDR_MINOR_0, 467 } ndmp_metadata_header_minor_t; 468 469 #define META_HDR_MINOR_VERSION META_HDR_MINOR_0 470 471 /* To support older backups */ 472 typedef struct ndmp_metadata_property { 473 char mp_name[NAME_MAX]; 474 char mp_value[NAME_MAX]; 475 char mp_source[NAME_MAX]; 476 } ndmp_metadata_property_t; 477 478 typedef struct ndmp_metadata_property_ext { 479 char mp_name[ZFS_MAX_DATASET_NAME_LEN]; 480 char mp_value[ZFS_MAXPROPLEN]; 481 char mp_source[ZFS_MAXPROPLEN]; 482 } ndmp_metadata_property_ext_t; 483 484 typedef struct ndmp_metadata_top_header { 485 char th_plname[100]; 486 uint_t th_plversion; 487 char th_magic[10]; 488 void *th_reserved_1; 489 int th_count; 490 } ndmp_metadata_top_header_t; 491 492 /* Original metadata format */ 493 typedef struct ndmp_metadata_header { 494 ndmp_metadata_top_header_t nh_hdr; 495 char nh_dataset[NAME_MAX]; 496 ndmp_metadata_property_t nh_property[1]; 497 } ndmp_metadata_header_t; 498 499 /* Extended metadata format */ 500 typedef struct ndmp_metadata_header_ext { 501 ndmp_metadata_top_header_t nh_hdr; 502 char nh_dataset[ZFS_MAX_DATASET_NAME_LEN]; 503 int32_t nh_total_bytes; 504 int32_t nh_major; 505 int32_t nh_minor; 506 ndmp_metadata_property_ext_t nh_property[1]; 507 } ndmp_metadata_header_ext_t; 508 509 #define nh_plname nh_hdr.th_plname 510 #define nh_plversion nh_hdr.th_plversion 511 #define nh_magic nh_hdr.th_magic 512 #define nh_count nh_hdr.th_count 513 514 typedef struct ndmp_metadata_handle { 515 void *ml_handle; 516 int32_t ml_quota_prop; 517 union { 518 ndmp_metadata_header_t *u_hdr; 519 ndmp_metadata_header_ext_t *u_xhdr; 520 } ml_hdr_u; 521 } ndmp_metadata_handle_t; 522 523 #define ml_hdr ml_hdr_u.u_hdr 524 #define ml_xhdr ml_hdr_u.u_xhdr 525 526 /* 527 * Node in struct hardlink_q 528 * 529 * inode: the inode of the hardlink 530 * path: the name of the hardlink, used during restore 531 * offset: tape offset of the data records for the hardlink, used during backup 532 * is_tmp: indicate whether the file was created temporarily for restoring 533 * other links during a non-DAR partial restore 534 */ 535 struct hardlink_node { 536 unsigned long inode; 537 char *path; 538 unsigned long long offset; 539 int is_tmp; 540 SLIST_ENTRY(hardlink_node) next_hardlink; 541 }; 542 543 /* 544 * Hardlinks that have been backed up or restored. 545 * 546 * During backup, each node represents a file whose 547 * (1) inode has multiple links 548 * (2) data has been backed up 549 * 550 * When we run into a file with multiple links during backup, 551 * we first check the list to see whether a file with the same inode 552 * has been backed up. If yes, we backup an empty record, while 553 * making the file history of this file contain the data offset 554 * of the offset of the file that has been backed up. If no, 555 * we backup this file, and add an entry to the list. 556 * 557 * During restore, each node represents an LF_LINK type record whose 558 * data has been restored (v.s. a hard link has been created). 559 * 560 * During restore, when we run into a record of LF_LINK type, we 561 * first check the queue to see whether a file with the same inode 562 * has been restored. If yes, we create a hardlink to it. 563 * If no, we restore the data, and add an entry to the list. 564 */ 565 struct hardlink_q { 566 struct hardlink_node *slh_first; 567 }; 568 569 /* Utility functions from handling hardlink */ 570 extern struct hardlink_q *hardlink_q_init(); 571 extern void hardlink_q_cleanup(struct hardlink_q *qhead); 572 extern int hardlink_q_get(struct hardlink_q *qhead, unsigned long inode, 573 unsigned long long *offset, char **path); 574 extern int hardlink_q_add(struct hardlink_q *qhead, unsigned long inode, 575 unsigned long long offset, char *path, int is_tmp); 576 577 #endif /* !_TLM_H_ */ 578