| 1 | /* |
| 2 | * Copyright 2000, International Business Machines Corporation and others. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 5 | * This software has been released under the terms of the IBM Public |
| 6 | * License. For details, see the LICENSE file in the top-level source |
| 7 | * directory or online at http://www.openafs.org/dl/license10.html |
| 8 | */ |
| 9 | |
| 10 | #include <afsconfig.h> |
| 11 | #include <afs/param.h> |
| 12 | |
| 13 | #include <roken.h> |
| 14 | |
| 15 | #ifdef HAVE_SYS_WAIT_H |
| 16 | #include <sys/wait.h> |
| 17 | #endif |
| 18 | |
| 19 | #include <limits.h> |
| 20 | #include <ctype.h> |
| 21 | |
| 22 | #include <lwp.h> |
| 23 | #include <afs/com_err.h> |
| 24 | #include <afs/butm.h> |
| 25 | #include <afs/usd.h> |
| 26 | |
| 27 | #include "error_macros.h" |
| 28 | #include "butm_prototypes.h" |
| 29 | |
| 30 | #ifdef O_LARGEFILE |
| 31 | typedef off64_t osi_lloff_t; |
| 32 | #else /* O_LARGEFILE */ |
| 33 | #ifdef AFS_HAVE_LLSEEK |
| 34 | typedef offset_t osi_lloff_t; |
| 35 | #else /* AFS_HAVE_LLSEEK */ |
| 36 | typedef off_t osi_lloff_t; |
| 37 | #endif /* AFS_HAVE_LLSEEK */ |
| 38 | #endif /* O_LARGEFILE */ |
| 39 | |
| 40 | extern int isafile; |
| 41 | |
| 42 | #define FILE_MAGIC 1000000007 /* s/w file mark */ |
| 43 | #define FILE_BEGIN 0 /* byte field in file mark */ |
| 44 | #define FILE_FMEND 1 /* byte field in file mark */ |
| 45 | #define FILE_EOD -1 /* byte field in file mark */ |
| 46 | #define TAPE_MAGIC 1100000009 /* tape label block */ |
| 47 | #define BLOCK_MAGIC 1100000005 /* file data block */ |
| 48 | #ifdef AFS_PTHREAD_ENV |
| 49 | #define POLL() |
| 50 | #define SLEEP(s) sleep(s) |
| 51 | #else |
| 52 | #define POLL() IOMGR_Poll() |
| 53 | #define SLEEP(s) IOMGR_Sleep(s) |
| 54 | #endif |
| 55 | |
| 56 | /* Notes: (PA) |
| 57 | * |
| 58 | * 1) filemarks and block marks have the magic,bytes fields reversed. This |
| 59 | * is undoubtedly a bug. Also note that the two structures have |
| 60 | * inconsistent types, overlaying int and afs_int32. |
| 61 | * 2) When a volume is dumped, if the volume is locked, the dump will produce |
| 62 | * an anomalous tape format of the form: |
| 63 | * s/w file begin mark |
| 64 | * volume header |
| 65 | * s/w file end mark |
| 66 | * The design of the original butm code means that this cannot be |
| 67 | * handled correctly. The code is modified so that ReadFileData |
| 68 | * returns BUTM_ENDVOLUME if it encounters the s/w filemark. |
| 69 | */ |
| 70 | |
| 71 | /* data organization on tape: |
| 72 | * all writes are in blocks of BUTM_BLOCKSIZE (= sizeof(blockMark) + BUTM_BLKSIZE) |
| 73 | * blockMark contains a magic number and counts of real data bytes |
| 74 | * written out in the block. |
| 75 | * |
| 76 | * each file is preceeded by a fileMark, which acts as the file |
| 77 | * delimiter. A file consists of contigous data blocks. TM does |
| 78 | * understand or interrpet the data in data blocks. |
| 79 | * |
| 80 | * The tape begins with a tape label and ends with EOF file markers |
| 81 | * in succession (2 or 4 of them ). |
| 82 | */ |
| 83 | |
| 84 | |
| 85 | struct fileMark { /* in network byte order */ |
| 86 | afs_int32 magic; |
| 87 | afs_uint32 nBytes; |
| 88 | }; |
| 89 | |
| 90 | struct tapeLabel { |
| 91 | afs_int32 magic; |
| 92 | struct butm_tapeLabel label; |
| 93 | }; |
| 94 | |
| 95 | struct progress { |
| 96 | usd_handle_t fid; /* file id of simulated tape */ |
| 97 | afs_int32 mountId; /* current mountId */ |
| 98 | afs_int32 reading; /* read file operation in progress */ |
| 99 | afs_int32 writing; /* write file operation in progress */ |
| 100 | }; |
| 101 | |
| 102 | static struct configuration { |
| 103 | char tapedir[64]; /* directory to create "tapes" */ |
| 104 | afs_int32 mountId; /* for detecting simultaneous mounts */ |
| 105 | afs_uint32 tapeSize; /* size of simulated tapes */ |
| 106 | afs_uint32 fileMarkSize; /* size of file mark, bytes */ |
| 107 | afs_int32 portOffset; /* port + portOffset is used by TC to listen */ |
| 108 | } config; |
| 109 | |
| 110 | static char *whoami = "file_tm"; |
| 111 | char tapeBlock[BUTM_BLOCKSIZE]; /* Tape buffer for reads and writes */ |
| 112 | |
| 113 | #define BLOCK_LABEL 0 /* read/write a tape label */ |
| 114 | #define BLOCK_FMBEGIN 1 /* read/write a begin FileMark */ |
| 115 | #define BLOCK_DATA 2 /* read/write a data block */ |
| 116 | #define BLOCK_FMEND 3 /* read/write an end FileMark */ |
| 117 | #define BLOCK_EOD 4 /* read/write an EOD FileMark */ |
| 118 | #define BLOCK_EOF 5 /* tape block is a HW EOF mark (usually error) */ |
| 119 | #define BLOCK_UNKNOWN 6 /* tape block is unknwon (error) */ |
| 120 | |
| 121 | #define WRITE_OP 1 |
| 122 | #define READ_OP 0 |
| 123 | |
| 124 | #define READS (((struct progress *)(info->tmRock))->reading) |
| 125 | #define WRITES (((struct progress *)(info->tmRock))->writing) |
| 126 | |
| 127 | /* ---------------------------------------------------------------------- |
| 128 | * These routines use the usd library to perform tape operations. |
| 129 | * ForkIoctl, ForkOpen, ForkClose, ForwardSpace, BackwardSpace, WriteEOF, |
| 130 | * PrepareAccess(nt), ShutdownAccess(nt) |
| 131 | * |
| 132 | * Return Values: USD functions return 0 if successful or errno if failed. |
| 133 | */ |
| 134 | /* ------------------ USD Interface Functions Begin ------------------------ */ |
| 135 | |
| 136 | /* |
| 137 | * On Unix, fork a child process to perform an IOCTL call. This avoids |
| 138 | * blocking the entire process during a tape operation |
| 139 | */ |
| 140 | |
| 141 | #ifndef AFS_NT40_ENV |
| 142 | /* Unix version of function */ |
| 143 | |
| 144 | static int |
| 145 | ForkIoctl(usd_handle_t fd, int op, int count) |
| 146 | { |
| 147 | int rc; /* return code from system calls */ |
| 148 | int i; /* loop index */ |
| 149 | int pid; /* process ID of child process */ |
| 150 | int status; /* exit status of child process */ |
| 151 | int ioctl_rc; /* return code from ioctl call */ |
| 152 | int pipefd[2]; /* pipe for child return status */ |
| 153 | int forkflag; /* flag set when ready to fork */ |
| 154 | usd_tapeop_t tapeop; /* tape operation specification */ |
| 155 | int unixfd; |
| 156 | |
| 157 | #ifdef AFS_PTHREAD_ENV |
| 158 | forkflag = 0; /* No need to fork if using pthreads */ |
| 159 | #else |
| 160 | forkflag = 1; |
| 161 | #endif |
| 162 | |
| 163 | /* initialize tape command structure */ |
| 164 | tapeop.tp_op = op; |
| 165 | tapeop.tp_count = count; |
| 166 | |
| 167 | /* create pipe for getting return code from child */ |
| 168 | if (forkflag) { |
| 169 | rc = pipe(pipefd); |
| 170 | if (rc < 0) { |
| 171 | printf("butm: Can't open pipe for IOCTL process. Error %d\n", |
| 172 | errno); |
| 173 | forkflag = 0; |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | if (forkflag) { |
| 178 | pid = fork(); |
| 179 | if (pid < 0) { |
| 180 | close(pipefd[0]); |
| 181 | close(pipefd[1]); |
| 182 | printf("butm: Can't fork IOCTL process. Error %d\n", errno); |
| 183 | forkflag = 0; |
| 184 | |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | if (!forkflag) { /* problem starting child process */ |
| 189 | /* do the ioctl anyway, it will probably work */ |
| 190 | ioctl_rc = USD_IOCTL(fd, USD_IOCTL_TAPEOPERATION, (void *)&tapeop); |
| 191 | } else if (pid == 0) { /* child process */ |
| 192 | /* close all unneccessary file descriptors */ |
| 193 | /* note: as painful as it is, we have to reach under the covers of |
| 194 | * the usd package to implement this functionality. |
| 195 | */ |
| 196 | unixfd = (intptr_t)(fd->handle); |
| 197 | |
| 198 | for (i = 3; i < _POSIX_OPEN_MAX; i++) { |
| 199 | if (i != unixfd && i != pipefd[1]) { |
| 200 | close(i); |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | /* do the ioctl call */ |
| 205 | ioctl_rc = USD_IOCTL(fd, USD_IOCTL_TAPEOPERATION, (void *)&tapeop); |
| 206 | |
| 207 | /* |
| 208 | * Send the return code back to the parent. |
| 209 | * If this fails, there's nothing we can do, but we must test |
| 210 | * it in order to avoid complier warnings on some platforms. |
| 211 | */ |
| 212 | if (write(pipefd[1], &ioctl_rc, sizeof(int)) < 0) { |
| 213 | /* don't care */ |
| 214 | } |
| 215 | |
| 216 | exit(0); |
| 217 | } else { /* parent process */ |
| 218 | |
| 219 | close(pipefd[1]); |
| 220 | POLL(); |
| 221 | /* read the result from the child process */ |
| 222 | rc = read(pipefd[0], &ioctl_rc, sizeof(int)); |
| 223 | if (rc != sizeof(int)) { |
| 224 | /* tape is now in unknown state */ |
| 225 | printf("butm: Can't determine IOCTL child status. Error %d\n", |
| 226 | errno); |
| 227 | ioctl_rc = EFAULT; |
| 228 | } |
| 229 | |
| 230 | close(pipefd[0]); |
| 231 | |
| 232 | /* get the completion status from the child process */ |
| 233 | rc = waitpid(pid, &status, 0); |
| 234 | while (rc < 0 && errno == EINTR) { |
| 235 | rc = waitpid(pid, &status, 0); |
| 236 | } |
| 237 | if (rc < 0) { |
| 238 | printf("butm: Can't determine IOCTL child status. Error %d\n", |
| 239 | errno); |
| 240 | } else if (status != 0) { |
| 241 | printf |
| 242 | ("butm: Unexpected IOCTL process status 0x%04x . Error %d\n", |
| 243 | status, errno); |
| 244 | } |
| 245 | SLEEP(1); |
| 246 | } |
| 247 | |
| 248 | return (ioctl_rc); |
| 249 | } |
| 250 | #else |
| 251 | /* NT version of function */ |
| 252 | |
| 253 | static int |
| 254 | ForkIoctl(usd_handle_t fd, int op, int count) |
| 255 | { |
| 256 | usd_tapeop_t tapeop; |
| 257 | |
| 258 | /* Issue requested tape control */ |
| 259 | tapeop.tp_op = op; |
| 260 | tapeop.tp_count = count; |
| 261 | |
| 262 | return (USD_IOCTL(fd, USD_IOCTL_TAPEOPERATION, (void *)&tapeop)); |
| 263 | } |
| 264 | #endif /* !AFS_NT40_ENV */ |
| 265 | |
| 266 | |
| 267 | /* |
| 268 | * On Unix, fork a child process to attempt to open the drive. We want to make |
| 269 | * certain there is tape in the drive before trying to open the device |
| 270 | * in the main process |
| 271 | */ |
| 272 | |
| 273 | #ifndef AFS_NT40_ENV |
| 274 | /* Unix version of function. */ |
| 275 | |
| 276 | static int |
| 277 | ForkOpen(char *device) |
| 278 | { |
| 279 | int rc; /* return code from system calls */ |
| 280 | int i; /* loop index */ |
| 281 | int pid; /* process ID of child process */ |
| 282 | int status; /* exit status of child process */ |
| 283 | int open_rc; /* return code from open */ |
| 284 | int pipefd[2]; /* pipe for child return status */ |
| 285 | int forkflag; /* flag set when ready to fork */ |
| 286 | usd_handle_t fd; /* handle returned from open */ |
| 287 | |
| 288 | #ifdef AFS_PTHREAD_ENV |
| 289 | forkflag = 0; /* No need to fork if using pthreads */ |
| 290 | #else |
| 291 | forkflag = 1; |
| 292 | #endif |
| 293 | |
| 294 | /* create pipe for getting return code from child */ |
| 295 | if (forkflag) { |
| 296 | rc = pipe(pipefd); |
| 297 | if (rc < 0) { |
| 298 | printf("butm: Cannot create pipe for OPEN process. Error %d\n", |
| 299 | errno); |
| 300 | forkflag = 0; |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | if (forkflag) { |
| 305 | pid = fork(); |
| 306 | if (pid < 0) { |
| 307 | close(pipefd[0]); |
| 308 | close(pipefd[1]); |
| 309 | printf("butm: Cannot create child process for OPEN. Error %d\n", |
| 310 | errno); |
| 311 | forkflag = 0; |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | if (!forkflag) { /* problem starting child process */ |
| 316 | /* |
| 317 | *return success, the caller will discover any problems |
| 318 | * when it opens the device. |
| 319 | */ |
| 320 | open_rc = 0; |
| 321 | } else if (pid == 0) { /* child process */ |
| 322 | /* close all unneccessary file descriptors */ |
| 323 | for (i = 3; i < _POSIX_OPEN_MAX; i++) { |
| 324 | if (i != pipefd[1]) { |
| 325 | close(i); |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | /* try the open */ |
| 330 | open_rc = usd_Open(device, USD_OPEN_RDONLY, 0, &fd); |
| 331 | |
| 332 | if (open_rc == 0) { |
| 333 | USD_CLOSE(fd); |
| 334 | } |
| 335 | |
| 336 | /* |
| 337 | * Send the return code back to the parent. |
| 338 | * If this fails, there's nothing we can do, but we must test |
| 339 | * it in order to avoid complier warnings on some platforms. |
| 340 | */ |
| 341 | if (write(pipefd[1], &open_rc, sizeof(open_rc)) < 0) { |
| 342 | /* don't care */ |
| 343 | } |
| 344 | |
| 345 | exit(0); |
| 346 | } else { /* parent process */ |
| 347 | |
| 348 | close(pipefd[1]); |
| 349 | |
| 350 | POLL(); |
| 351 | /* read the result from the child process */ |
| 352 | rc = read(pipefd[0], &open_rc, sizeof(open_rc)); |
| 353 | if (rc != sizeof(open_rc)) { |
| 354 | /* this is not a problem since we will reopen the device anyway */ |
| 355 | printf("butm: No response from OPEN process. Error %d\n", errno); |
| 356 | open_rc = 0; |
| 357 | } |
| 358 | |
| 359 | close(pipefd[0]); |
| 360 | |
| 361 | /* get the completion status from the child process */ |
| 362 | rc = waitpid(pid, &status, 0); |
| 363 | while (rc < 0 && errno == EINTR) { |
| 364 | rc = waitpid(pid, &status, 0); |
| 365 | } |
| 366 | if (rc < 0) { |
| 367 | printf("butm: Cannot get status of OPEN process. Error %d\n", |
| 368 | errno); |
| 369 | } else if (status != 0) { |
| 370 | printf |
| 371 | ("butm: Unexpected OPEN process exit status 0x%04x. Error %d \n", |
| 372 | status, errno); |
| 373 | } |
| 374 | SLEEP(1); |
| 375 | } |
| 376 | |
| 377 | return (open_rc); |
| 378 | } |
| 379 | #else |
| 380 | /* NT version of function. */ |
| 381 | |
| 382 | static int |
| 383 | ForkOpen(char *device) |
| 384 | { |
| 385 | return (0); |
| 386 | } |
| 387 | #endif /* AFS_NT40_ENV */ |
| 388 | |
| 389 | /* |
| 390 | * On Unix, fork a child process to close the drive. If the drive rewinds |
| 391 | * on close it could cause the process to block. |
| 392 | */ |
| 393 | |
| 394 | #ifndef AFS_NT40_ENV |
| 395 | /* Unix version of function */ |
| 396 | |
| 397 | static int |
| 398 | ForkClose(usd_handle_t fd) |
| 399 | { |
| 400 | int rc; /* return code from system calls */ |
| 401 | int i; /* loop index */ |
| 402 | int pid; /* process ID of child process */ |
| 403 | int status; /* exit status of child process */ |
| 404 | int close_rc, parent_close_rc; /* return codes from close */ |
| 405 | int pipefd[2]; /* pipe for child return status */ |
| 406 | int ctlpipe[2]; /* pipe for message to child */ |
| 407 | int forkflag; /* flag set when ready to fork */ |
| 408 | int unixfd; |
| 409 | |
| 410 | #ifdef AFS_PTHREAD_ENV |
| 411 | forkflag = 0; /* No need to fork if using pthreads */ |
| 412 | #else |
| 413 | forkflag = 1; |
| 414 | #endif |
| 415 | |
| 416 | /* create pipe for getting return code from child */ |
| 417 | if (forkflag) { |
| 418 | rc = pipe(pipefd); |
| 419 | if (rc < 0) { |
| 420 | printf("butm: Cannot create pipe for CLOSE process. Error %d\n", |
| 421 | errno); |
| 422 | forkflag = 0; |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | /* create pipe for notifying child when to close */ |
| 427 | if (forkflag) { |
| 428 | rc = pipe(ctlpipe); |
| 429 | if (rc < 0) { |
| 430 | close(pipefd[0]); |
| 431 | close(pipefd[1]); |
| 432 | printf("butm: Cannot create pipe for CLOSE process. Error %d\n", |
| 433 | errno); |
| 434 | forkflag = 0; |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | if (forkflag) { |
| 439 | pid = fork(); |
| 440 | if (pid < 0) { |
| 441 | close(pipefd[0]); |
| 442 | close(pipefd[1]); |
| 443 | close(ctlpipe[0]); |
| 444 | close(ctlpipe[1]); |
| 445 | printf("butm: Cannot create CLOSE child process. Error %d\n", |
| 446 | errno); |
| 447 | forkflag = 0; |
| 448 | } |
| 449 | } |
| 450 | |
| 451 | if (!forkflag) { /* problem starting child process */ |
| 452 | close_rc = USD_CLOSE(fd); |
| 453 | parent_close_rc = close_rc; |
| 454 | } else if (pid == 0) { /* child process */ |
| 455 | /* close all unneccessary file descriptors */ |
| 456 | /* note: as painful as it is, we have to reach under the covers of |
| 457 | * the usd package to implement this functionality. |
| 458 | */ |
| 459 | unixfd = (intptr_t)(fd->handle); |
| 460 | |
| 461 | for (i = 3; i < _POSIX_OPEN_MAX; i++) { |
| 462 | if (i != unixfd && i != ctlpipe[0] && i != pipefd[1]) { |
| 463 | close(i); |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | /* |
| 468 | * The parent writes the control pipe after it closes the device. |
| 469 | * We don't actually care about the read; we're just using it to |
| 470 | * block until the parent is ready. But we must do something |
| 471 | * with the result, to avoid complier warnings on some platforms. |
| 472 | */ |
| 473 | if (read(ctlpipe[0], &close_rc, sizeof(int)) < 0) { |
| 474 | /* don't care */ |
| 475 | } |
| 476 | close(ctlpipe[0]); |
| 477 | |
| 478 | /* do the close */ |
| 479 | close_rc = USD_CLOSE(fd); |
| 480 | |
| 481 | /* |
| 482 | * Send the return code back to the parent. |
| 483 | * If this fails, there's nothing we can do, but we must test |
| 484 | * it in order to avoid complier warnings on some platforms. |
| 485 | */ |
| 486 | if (write(pipefd[1], &close_rc, sizeof(int)) < 0) { |
| 487 | /* don't care */ |
| 488 | } |
| 489 | |
| 490 | exit(0); |
| 491 | } else { /* parent process */ |
| 492 | |
| 493 | close(pipefd[1]); |
| 494 | close(ctlpipe[0]); |
| 495 | |
| 496 | POLL(); |
| 497 | /* |
| 498 | * close the device, this should have no effect as long as the |
| 499 | * child has not closed |
| 500 | */ |
| 501 | |
| 502 | parent_close_rc = USD_CLOSE(fd); |
| 503 | |
| 504 | /* notify the child to do its close */ |
| 505 | rc = write(ctlpipe[1], &close_rc, sizeof(int)); /* just send garbage */ |
| 506 | if (rc != sizeof(int)) { |
| 507 | printf("butm: Error communicating with CLOSE process. Error %d\n", |
| 508 | errno); |
| 509 | } |
| 510 | close(ctlpipe[1]); |
| 511 | |
| 512 | /* read the result from the child process */ |
| 513 | rc = read(pipefd[0], &close_rc, sizeof(int)); |
| 514 | if (rc != sizeof(int)) { |
| 515 | /* logging is enough, since we wrote a file mark the */ |
| 516 | /* return code from the close doesn't really matter */ |
| 517 | printf("butm: No response from CLOSE process. Error %d\n", |
| 518 | errno); |
| 519 | close_rc = 0; |
| 520 | } |
| 521 | |
| 522 | close(pipefd[0]); |
| 523 | |
| 524 | /* get the completion status from the child process */ |
| 525 | rc = waitpid(pid, &status, 0); |
| 526 | while (rc < 0 && errno == EINTR) { |
| 527 | rc = waitpid(pid, &status, 0); |
| 528 | } |
| 529 | if (rc < 0) { |
| 530 | printf("butm: Cannot get status of CLOSE process. Error %d\n", |
| 531 | errno); |
| 532 | } else if (status != 0) { |
| 533 | printf |
| 534 | ("butm: Unexpected exit status 0x%04x from CLOSE process. Error %d\n", |
| 535 | status, errno); |
| 536 | } |
| 537 | |
| 538 | /* if either process received an error, then return an error */ |
| 539 | if (parent_close_rc < 0) { |
| 540 | close_rc = parent_close_rc; |
| 541 | } |
| 542 | SLEEP(1); |
| 543 | } |
| 544 | |
| 545 | return (close_rc); |
| 546 | } |
| 547 | #else |
| 548 | /* NT version of function */ |
| 549 | |
| 550 | static int |
| 551 | ForkClose(usd_handle_t fd) |
| 552 | { |
| 553 | return (USD_CLOSE(fd)); |
| 554 | } |
| 555 | #endif /* AFS_NT40_ENV */ |
| 556 | |
| 557 | /* Forward space file */ |
| 558 | static int |
| 559 | ForwardSpace(usd_handle_t fid, int count) |
| 560 | { |
| 561 | POLL(); |
| 562 | |
| 563 | if (isafile) { |
| 564 | return (0); |
| 565 | } else { |
| 566 | return (ForkIoctl(fid, USDTAPE_FSF, count)); |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | /* Backward space file */ |
| 571 | static int |
| 572 | BackwardSpace(usd_handle_t fid, int count) |
| 573 | { |
| 574 | POLL(); |
| 575 | |
| 576 | if (isafile) { |
| 577 | return (0); |
| 578 | } else { |
| 579 | return (ForkIoctl(fid, USDTAPE_BSF, count)); |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | /* write end of file mark */ |
| 584 | static int |
| 585 | WriteEOF(usd_handle_t fid, int count) |
| 586 | { |
| 587 | POLL(); |
| 588 | |
| 589 | if (isafile) { |
| 590 | return (0); |
| 591 | } else { |
| 592 | return (ForkIoctl(fid, USDTAPE_WEOF, count)); |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | /* rewind tape */ |
| 597 | static int |
| 598 | Rewind(usd_handle_t fid) |
| 599 | { |
| 600 | if (isafile) { |
| 601 | afs_int64 stopOff; |
| 602 | |
| 603 | return (USD_SEEK(fid, 0, SEEK_SET, &stopOff)); |
| 604 | } else { |
| 605 | return (ForkIoctl(fid, USDTAPE_REW, 0)); |
| 606 | } |
| 607 | } |
| 608 | |
| 609 | /* prepare tape drive for access */ |
| 610 | static int |
| 611 | PrepareAccess(usd_handle_t fid) |
| 612 | { |
| 613 | int code = 0; |
| 614 | #ifdef AFS_NT40_ENV |
| 615 | if (!isafile) { |
| 616 | (void)ForkIoctl(fid, USDTAPE_PREPARE, 0); |
| 617 | } |
| 618 | /* NT won't rewind tape when it is opened */ |
| 619 | code = Rewind(fid); |
| 620 | #endif /* AFS_NT40_ENV */ |
| 621 | return code; |
| 622 | } |
| 623 | |
| 624 | /* decommission tape drive after all accesses complete */ |
| 625 | static int |
| 626 | ShutdownAccess(usd_handle_t fid) |
| 627 | { |
| 628 | #ifdef AFS_NT40_ENV |
| 629 | if (!isafile) { |
| 630 | (void)ForkIoctl(fid, USDTAPE_SHUTDOWN, 0); |
| 631 | } |
| 632 | #endif /* AFS_NT40_ENV */ |
| 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | /* -------------------- USD Interface Functions End ----------------------- */ |
| 637 | |
| 638 | /* ===================================================================== |
| 639 | * Support routines |
| 640 | * ===================================================================== */ |
| 641 | |
| 642 | /* incSize |
| 643 | * add the supplied no. of bytes to the byte count of information placed |
| 644 | * on the tape. |
| 645 | * entry: |
| 646 | * dataSize - bytes used on the tape |
| 647 | */ |
| 648 | |
| 649 | void |
| 650 | incSize(struct butm_tapeInfo *info, afs_uint32 dataSize) |
| 651 | { |
| 652 | info->nBytes += dataSize; |
| 653 | info->kBytes += (info->nBytes / 1024); |
| 654 | info->nBytes %= 1024; |
| 655 | } |
| 656 | |
| 657 | /* incPosition |
| 658 | * IF YOU ADD/CHANGE THE ifdefs, BE SURE |
| 659 | * TO ALSO MAKE THE SAME CHANGES IN bu_utils/fms.c. |
| 660 | * |
| 661 | * add the supplied no. of bytes to the byte count of data placed |
| 662 | * on the tape. Also check for reaching 2GB limit and reset the |
| 663 | * pointer if necessary. This allows us to use >2GB tapes. |
| 664 | * entry: |
| 665 | * fid - file id for the tape. |
| 666 | * dataSize - bytes used on the tape |
| 667 | */ |
| 668 | |
| 669 | void |
| 670 | incPosition(struct butm_tapeInfo *info, usd_handle_t fid, afs_uint32 dataSize) |
| 671 | { |
| 672 | /* Add this to the amount of data written to the tape */ |
| 673 | incSize(info, dataSize); |
| 674 | |
| 675 | info->posCount += dataSize; |
| 676 | |
| 677 | if (info->posCount >= 2147467264) { /* 2GB - 16K */ |
| 678 | info->posCount = 0; |
| 679 | #if (defined(AFS_SUN_ENV) || defined(AFS_LINUX24_ENV)) |
| 680 | if (!isafile) { |
| 681 | afs_int64 off; |
| 682 | |
| 683 | off = 0; |
| 684 | USD_IOCTL(fid, USD_IOCTL_SETSIZE, &off); |
| 685 | } |
| 686 | #endif |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | /* |
| 691 | * This accounts for tape drives with a block size different from variable or 16K |
| 692 | * blocks and only reads that block size. |
| 693 | */ |
| 694 | afs_int32 TapeBlockSize; |
| 695 | afs_int32 |
| 696 | readData(usd_handle_t fid, char *data, afs_uint32 totalSize, afs_int32 *errorP) |
| 697 | { |
| 698 | afs_int32 toread; /* Number of bytes to read */ |
| 699 | afs_uint32 rSize; /* Total bytes read so far */ |
| 700 | afs_uint32 tSize; /* Temporary size */ |
| 701 | afs_int32 rc; /* return code */ |
| 702 | |
| 703 | toread = totalSize; /* First, try to read all the data */ |
| 704 | |
| 705 | rc = USD_READ(fid, &data[0], toread, &rSize); |
| 706 | if (rc != 0) { |
| 707 | *errorP = rc; |
| 708 | return -1; |
| 709 | } |
| 710 | if (rSize == 0) /* reached EOF */ |
| 711 | return rSize; |
| 712 | |
| 713 | if (rSize != TapeBlockSize) { /* Tape block size has changed */ |
| 714 | TapeBlockSize = rSize; |
| 715 | printf("Tape blocks read in %d Byte chunks.\n", TapeBlockSize); |
| 716 | } |
| 717 | |
| 718 | /* Read the rest of the data in */ |
| 719 | while (rSize < totalSize) { |
| 720 | toread = |
| 721 | ((totalSize - rSize) < |
| 722 | TapeBlockSize ? (totalSize - rSize) : TapeBlockSize); |
| 723 | rc = USD_READ(fid, &data[rSize], toread, &tSize); |
| 724 | if (rc) |
| 725 | *errorP = rc; |
| 726 | else |
| 727 | rSize += tSize; |
| 728 | if (tSize != toread) |
| 729 | break; |
| 730 | } |
| 731 | |
| 732 | if (rSize > totalSize) |
| 733 | printf("readData - Read > 16K data block - continuing.\n"); |
| 734 | |
| 735 | return (rSize); |
| 736 | } |
| 737 | |
| 738 | afs_int32 |
| 739 | SeekFile(struct butm_tapeInfo *info, int count) |
| 740 | { |
| 741 | afs_int32 code = 0; |
| 742 | struct progress *p; |
| 743 | afs_int32 error = 0; |
| 744 | |
| 745 | if (count == 0) |
| 746 | ERROR_EXIT(0); |
| 747 | p = (struct progress *)info->tmRock; |
| 748 | |
| 749 | if (isafile) { /* no reason for seeking through a file */ |
| 750 | p->reading = p->writing = 0; |
| 751 | return (0); |
| 752 | } |
| 753 | |
| 754 | POLL(); |
| 755 | |
| 756 | if (count > 0) |
| 757 | error = ForwardSpace(p->fid, count); |
| 758 | else |
| 759 | error = BackwardSpace(p->fid, -count); |
| 760 | |
| 761 | POLL(); |
| 762 | |
| 763 | if (error) { |
| 764 | info->status |= BUTM_STATUS_SEEKERROR; |
| 765 | ERROR_EXIT(BUTM_IOCTL); |
| 766 | } |
| 767 | |
| 768 | info->position += count; |
| 769 | incSize(info, (count * config.fileMarkSize)); |
| 770 | p = (struct progress *)info->tmRock; |
| 771 | p->reading = p->writing = 0; |
| 772 | |
| 773 | error_exit: |
| 774 | if (error) |
| 775 | info->error = error; |
| 776 | return (code); |
| 777 | } |
| 778 | |
| 779 | /* Step to the next filemark if we are not at one already */ |
| 780 | afs_int32 |
| 781 | NextFile(struct butm_tapeInfo *info) |
| 782 | { |
| 783 | afs_int32 code; |
| 784 | |
| 785 | if (!READS && !WRITES) |
| 786 | return 0; |
| 787 | |
| 788 | code = SeekFile(info, 1); |
| 789 | return (code); |
| 790 | } |
| 791 | |
| 792 | static afs_int32 |
| 793 | WriteTapeBlock(struct butm_tapeInfo *info, |
| 794 | char *buffer, /* assumed to be 16384 bytes with data in it */ |
| 795 | afs_int32 length, /* amount data in buffer */ |
| 796 | afs_int32 blockType) |
| 797 | { |
| 798 | afs_int32 code = 0, rc = 0; |
| 799 | afs_uint32 wsize; |
| 800 | struct tapeLabel *label; |
| 801 | struct fileMark *fmark; |
| 802 | struct blockMark *bmark; |
| 803 | struct progress *p; |
| 804 | afs_int32 error = 0; |
| 805 | |
| 806 | p = (struct progress *)info->tmRock; |
| 807 | |
| 808 | if (blockType == BLOCK_DATA) { /* Data Block */ |
| 809 | if (length == 0) |
| 810 | ERROR_EXIT(0); |
| 811 | bmark = (struct blockMark *)buffer; |
| 812 | memset(bmark, 0, sizeof(struct blockMark)); |
| 813 | bmark->magic = htonl(BLOCK_MAGIC); |
| 814 | bmark->count = htonl(length); |
| 815 | } else if (blockType == BLOCK_FMBEGIN) { /* Filemark - begin */ |
| 816 | fmark = (struct fileMark *)buffer; |
| 817 | fmark->magic = htonl(FILE_MAGIC); |
| 818 | fmark->nBytes = htonl(FILE_BEGIN); |
| 819 | } else if (blockType == BLOCK_FMEND) { /* Filemark - end */ |
| 820 | fmark = (struct fileMark *)buffer; |
| 821 | fmark->magic = htonl(FILE_MAGIC); |
| 822 | fmark->nBytes = htonl(FILE_FMEND); |
| 823 | } else if (blockType == BLOCK_LABEL) { /* Label */ |
| 824 | label = (struct tapeLabel *)buffer; |
| 825 | label->magic = htonl(TAPE_MAGIC); |
| 826 | } else if (blockType == BLOCK_EOD) { /* Filemark - EOD mark */ |
| 827 | fmark = (struct fileMark *)buffer; |
| 828 | fmark->magic = htonl(FILE_MAGIC); |
| 829 | fmark->nBytes = htonl(FILE_EOD); |
| 830 | } |
| 831 | |
| 832 | /* Write the tape block */ |
| 833 | /* -------------------- */ |
| 834 | rc = USD_WRITE(p->fid, buffer, BUTM_BLOCKSIZE, &wsize); |
| 835 | if ((rc == 0) && (wsize > 0)) { |
| 836 | incPosition(info, p->fid, wsize); /* record whats written */ |
| 837 | p->writing++; |
| 838 | } |
| 839 | |
| 840 | if (wsize != BUTM_BLOCKSIZE) { |
| 841 | info->status |= BUTM_STATUS_WRITEERROR; |
| 842 | if (rc != 0) { |
| 843 | error = rc; |
| 844 | ERROR_EXIT(BUTM_IO); |
| 845 | } else |
| 846 | ERROR_EXIT(BUTM_EOT); |
| 847 | } |
| 848 | if (isafile) |
| 849 | info->position++; |
| 850 | |
| 851 | /* Write trailing EOF marker for some block types */ |
| 852 | /* ---------------------------------------------- */ |
| 853 | if ((blockType == BLOCK_FMEND) || (blockType == BLOCK_LABEL) |
| 854 | || (blockType == BLOCK_EOD)) { |
| 855 | |
| 856 | POLL(); |
| 857 | error = WriteEOF(p->fid, 1); |
| 858 | POLL(); |
| 859 | if (error) { |
| 860 | info->status |= BUTM_STATUS_WRITEERROR; |
| 861 | ERROR_EXIT(BUTM_IOCTL); |
| 862 | } |
| 863 | |
| 864 | incSize(info, config.fileMarkSize); |
| 865 | if (!isafile) |
| 866 | info->position++; |
| 867 | p->writing = 0; |
| 868 | } |
| 869 | |
| 870 | error_exit: |
| 871 | if (error) |
| 872 | info->error = error; |
| 873 | return (code); |
| 874 | } |
| 875 | |
| 876 | static afs_int32 |
| 877 | ReadTapeBlock(struct butm_tapeInfo *info, |
| 878 | char *buffer, /* assumed to be 16384 bytes */ |
| 879 | afs_int32 *blockType) |
| 880 | { |
| 881 | afs_int32 code = 0; |
| 882 | afs_int32 rsize, fmtype; |
| 883 | struct tapeLabel *label; |
| 884 | struct fileMark *fmark; |
| 885 | struct blockMark *bmark; |
| 886 | struct progress *p; |
| 887 | |
| 888 | *blockType = BLOCK_UNKNOWN; |
| 889 | |
| 890 | p = (struct progress *)info->tmRock; |
| 891 | |
| 892 | memset(buffer, 0, BUTM_BLOCKSIZE); |
| 893 | label = (struct tapeLabel *)buffer; |
| 894 | fmark = (struct fileMark *)buffer; |
| 895 | bmark = (struct blockMark *)buffer; |
| 896 | |
| 897 | rsize = readData(p->fid, buffer, BUTM_BLOCKSIZE, &info->error); |
| 898 | if (rsize > 0) { |
| 899 | incPosition(info, p->fid, rsize); |
| 900 | p->reading++; |
| 901 | } |
| 902 | |
| 903 | if (rsize == 0) { /* Read a HW EOF Marker? OK */ |
| 904 | *blockType = BLOCK_EOF; |
| 905 | incSize(info, config.fileMarkSize); /* Size of filemark */ |
| 906 | if (!isafile) |
| 907 | info->position++; /* bump position */ |
| 908 | p->reading = 0; /* No reads since EOF */ |
| 909 | } |
| 910 | |
| 911 | else if (rsize != BUTM_BLOCKSIZE) { /* Didn't Read a full block */ |
| 912 | info->status |= BUTM_STATUS_READERROR; |
| 913 | ERROR_EXIT((rsize < 0) ? BUTM_IO : BUTM_EOT); |
| 914 | } |
| 915 | |
| 916 | else if (ntohl(bmark->magic) == BLOCK_MAGIC) { /* Data block? */ |
| 917 | *blockType = BLOCK_DATA; |
| 918 | } |
| 919 | |
| 920 | else if (ntohl(fmark->magic) == FILE_MAGIC) { /* Read a filemark? */ |
| 921 | fmtype = ntohl(fmark->nBytes); |
| 922 | |
| 923 | if (fmtype == FILE_BEGIN) { /* filemark begin */ |
| 924 | *blockType = BLOCK_FMBEGIN; |
| 925 | } else if (fmtype == FILE_FMEND) { /* filemark end */ |
| 926 | *blockType = BLOCK_FMEND; |
| 927 | code = SeekFile(info, 1); |
| 928 | } else if (fmtype == FILE_EOD) { /* EOD mark */ |
| 929 | *blockType = BLOCK_EOD; |
| 930 | info->status |= BUTM_STATUS_EOD; |
| 931 | code = SeekFile(info, 1); |
| 932 | } |
| 933 | } |
| 934 | |
| 935 | else if (ntohl(label->magic) == TAPE_MAGIC) { /* Read a tape label? */ |
| 936 | *blockType = BLOCK_LABEL; |
| 937 | code = SeekFile(info, 1); |
| 938 | } |
| 939 | |
| 940 | if (isafile) |
| 941 | info->position++; |
| 942 | |
| 943 | error_exit: |
| 944 | return (code); |
| 945 | } |
| 946 | |
| 947 | /* check |
| 948 | * check version numbers and permissions in the info structure |
| 949 | */ |
| 950 | |
| 951 | static afs_int32 |
| 952 | check(struct butm_tapeInfo *info, |
| 953 | int write) /* write operation requested */ |
| 954 | { |
| 955 | struct progress *p; |
| 956 | |
| 957 | if (!info) |
| 958 | return (BUTM_BADARGUMENT); |
| 959 | |
| 960 | /* Check version number in info structure */ |
| 961 | if (info->structVersion != BUTM_MAJORVERSION) |
| 962 | return BUTM_OLDINTERFACE; |
| 963 | |
| 964 | /* Check if a tape is mounted */ |
| 965 | if (((p = (struct progress *)info->tmRock) == 0) || (p->fid == 0)) |
| 966 | return BUTM_NOMOUNT; |
| 967 | |
| 968 | /* If writing check if there is write access */ |
| 969 | if (write && (info->flags & BUTM_FLAGS_READONLY)) |
| 970 | return BUTM_READONLY; |
| 971 | |
| 972 | return 0; |
| 973 | } |
| 974 | |
| 975 | static afs_int32 |
| 976 | rewindFile(struct butm_tapeInfo *info) |
| 977 | { |
| 978 | struct progress *p; |
| 979 | afs_int32 code = 0; |
| 980 | afs_int32 error; |
| 981 | |
| 982 | p = (struct progress *)info->tmRock; |
| 983 | |
| 984 | POLL(); |
| 985 | |
| 986 | error = Rewind(p->fid); |
| 987 | |
| 988 | POLL(); |
| 989 | |
| 990 | if (error) { |
| 991 | info->status |= BUTM_STATUS_SEEKERROR; |
| 992 | ERROR_EXIT(BUTM_IOCTL); |
| 993 | } |
| 994 | |
| 995 | info->position = (isafile ? 0 : 1); |
| 996 | info->kBytes = info->nBytes = 0; |
| 997 | info->nFiles = info->nRecords = 0; |
| 998 | p->reading = p->writing = 0; |
| 999 | |
| 1000 | error_exit: |
| 1001 | if (error) |
| 1002 | info->error = error; |
| 1003 | return (code); |
| 1004 | } |
| 1005 | |
| 1006 | /* ===================================================================== |
| 1007 | * butm routines |
| 1008 | * ===================================================================== */ |
| 1009 | |
| 1010 | static afs_int32 |
| 1011 | file_Mount(struct butm_tapeInfo *info, char *tape) |
| 1012 | { |
| 1013 | struct progress *p; |
| 1014 | char filename[64]; |
| 1015 | usd_handle_t fid; |
| 1016 | int xflags; |
| 1017 | afs_int32 code = 0, error = 0, rc = 0; |
| 1018 | |
| 1019 | if (!info || !tape) |
| 1020 | ERROR_EXIT(BUTM_BADARGUMENT); |
| 1021 | |
| 1022 | if (info->debug) |
| 1023 | printf("butm: Mount tape drive\n"); |
| 1024 | |
| 1025 | POLL(); |
| 1026 | info->error = 0; |
| 1027 | |
| 1028 | if (info->structVersion != BUTM_MAJORVERSION) |
| 1029 | ERROR_EXIT(BUTM_OLDINTERFACE); |
| 1030 | if (info->tmRock) |
| 1031 | ERROR_EXIT(BUTM_PARALLELMOUNTS); |
| 1032 | if (strlen(tape) >= sizeof(info->name)) |
| 1033 | ERROR_EXIT(BUTM_BADARGUMENT); |
| 1034 | |
| 1035 | strcpy(info->name, tape); |
| 1036 | |
| 1037 | strcpy(filename, config.tapedir); /* the name of the tape device */ |
| 1038 | info->position = (isafile ? 0 : 1); |
| 1039 | info->kBytes = info->nBytes = 0; |
| 1040 | info->nRecords = info->nFiles = 0; |
| 1041 | info->recordSize = 0; |
| 1042 | info->tapeSize = config.tapeSize; |
| 1043 | info->coefBytes = 1; |
| 1044 | info->coefRecords = 0; |
| 1045 | info->coefFiles = sizeof(struct fileMark); |
| 1046 | info->simultaneousTapes = 1; |
| 1047 | info->status = 0; |
| 1048 | info->error = 0; |
| 1049 | info->flags = BUTM_FLAGS_SEQUENTIAL; |
| 1050 | |
| 1051 | xflags = 0; |
| 1052 | if (isafile) { |
| 1053 | xflags |= USD_OPEN_CREATE; |
| 1054 | } else { |
| 1055 | /* |
| 1056 | * try to open in a child process first so nothing will |
| 1057 | * time out should the process block because the device |
| 1058 | * isn't ready. |
| 1059 | */ |
| 1060 | |
| 1061 | if (ForkOpen(filename)) { |
| 1062 | ERROR_EXIT(BUTM_MOUNTFAIL); |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | /* Now go ahead and open the tape drive for real */ |
| 1067 | rc = usd_Open(filename, (USD_OPEN_RDWR | USD_OPEN_WLOCK | xflags), 0777, |
| 1068 | &fid); |
| 1069 | if (rc != 0) { /* try for lesser access */ |
| 1070 | rc = usd_Open(filename, (USD_OPEN_RDONLY | USD_OPEN_RLOCK), 0, &fid); |
| 1071 | |
| 1072 | if (rc) { |
| 1073 | error = rc; |
| 1074 | ERROR_EXIT(BUTM_MOUNTFAIL); |
| 1075 | } |
| 1076 | info->flags |= BUTM_FLAGS_READONLY; |
| 1077 | } |
| 1078 | |
| 1079 | (void)PrepareAccess(fid); /* for NT */ |
| 1080 | |
| 1081 | p = malloc(sizeof(*p)); |
| 1082 | info->tmRock = (char *)p; |
| 1083 | p->fid = fid; |
| 1084 | p->mountId = config.mountId = time(0); |
| 1085 | p->reading = p->writing = 0; |
| 1086 | |
| 1087 | TapeBlockSize = BUTM_BLOCKSIZE; /* Initialize */ |
| 1088 | |
| 1089 | error_exit: |
| 1090 | if (error) |
| 1091 | info->error = error; |
| 1092 | return (code); |
| 1093 | } |
| 1094 | |
| 1095 | static afs_int32 |
| 1096 | file_Dismount(struct butm_tapeInfo *info) |
| 1097 | { |
| 1098 | struct progress *p; |
| 1099 | afs_int32 code = 0, error = 0; |
| 1100 | |
| 1101 | if (info->debug) |
| 1102 | printf("butm: Unmount tape drive\n"); |
| 1103 | |
| 1104 | POLL(); |
| 1105 | info->error = 0; |
| 1106 | |
| 1107 | code = check(info, READ_OP); |
| 1108 | if (code) |
| 1109 | ERROR_EXIT(code); |
| 1110 | |
| 1111 | p = (struct progress *)info->tmRock; |
| 1112 | |
| 1113 | (void)ShutdownAccess(p->fid); /* for NT */ |
| 1114 | |
| 1115 | /* close the device */ |
| 1116 | if ((error = ForkClose(p->fid))) { |
| 1117 | printf("butm: Tape close failed. Error %d\n", errno); |
| 1118 | } |
| 1119 | |
| 1120 | POLL(); |
| 1121 | |
| 1122 | if (error) { |
| 1123 | code = BUTM_DISMOUNTFAIL; |
| 1124 | info->status |= BUTM_STATUS_TAPEERROR; |
| 1125 | } |
| 1126 | |
| 1127 | config.mountId = 0; |
| 1128 | info->tmRock = 0; /* mark it as closed - even if error on close */ |
| 1129 | if (p) |
| 1130 | free(p); |
| 1131 | |
| 1132 | error_exit: |
| 1133 | if (error) |
| 1134 | info->error = error; |
| 1135 | return (code); |
| 1136 | } |
| 1137 | |
| 1138 | /* file_WriteLabel |
| 1139 | * write the header on a tape |
| 1140 | * entry: |
| 1141 | * info - handle on tape unit |
| 1142 | * label - label information. This label is not copied onto the tape. |
| 1143 | * If supplied, various fields are copied from this label to |
| 1144 | * the actual tape label written on the tape. |
| 1145 | */ |
| 1146 | |
| 1147 | static afs_int32 |
| 1148 | file_WriteLabel(struct butm_tapeInfo *info, struct butm_tapeLabel *label, |
| 1149 | afs_int32 rewind) |
| 1150 | { |
| 1151 | afs_int32 code = 0; |
| 1152 | afs_int32 fcode; |
| 1153 | struct tapeLabel *tlabel; |
| 1154 | struct progress *p; |
| 1155 | afs_int64 off; /* offset */ |
| 1156 | |
| 1157 | if (info->debug) |
| 1158 | printf("butm: Write tape label\n"); |
| 1159 | |
| 1160 | POLL(); |
| 1161 | info->error = 0; |
| 1162 | |
| 1163 | code = check(info, WRITE_OP); |
| 1164 | if (code) |
| 1165 | ERROR_EXIT(code); |
| 1166 | if (!label) |
| 1167 | ERROR_EXIT(BUTM_BADARGUMENT); |
| 1168 | if (label->structVersion != CUR_TAPE_VERSION) |
| 1169 | ERROR_EXIT(BUTM_OLDINTERFACE); |
| 1170 | |
| 1171 | if (rewind) { /* Not appending, so rewind */ |
| 1172 | code = rewindFile(info); |
| 1173 | if (code) |
| 1174 | ERROR_EXIT(code); |
| 1175 | |
| 1176 | if (isafile) { |
| 1177 | p = (struct progress *)info->tmRock; |
| 1178 | off = 0; |
| 1179 | code = USD_IOCTL(p->fid, USD_IOCTL_SETSIZE, &off); |
| 1180 | if (code) |
| 1181 | ERROR_EXIT(BUTM_POSITION); |
| 1182 | } |
| 1183 | } else { |
| 1184 | if (READS || WRITES) |
| 1185 | ERROR_EXIT(BUTM_BADOP); |
| 1186 | } |
| 1187 | |
| 1188 | /* Copy the label into the tape block |
| 1189 | * ---------------------------------- */ |
| 1190 | memset(tapeBlock, 0, BUTM_BLOCKSIZE); |
| 1191 | |
| 1192 | if (!label->creationTime) |
| 1193 | label->creationTime = time(0); |
| 1194 | |
| 1195 | tlabel = (struct tapeLabel *)tapeBlock; |
| 1196 | memcpy(&tlabel->label, label, sizeof(struct butm_tapeLabel)); |
| 1197 | tlabel->label.structVersion = htonl(CUR_TAPE_VERSION); |
| 1198 | tlabel->label.creationTime = htonl(tlabel->label.creationTime); |
| 1199 | tlabel->label.expirationDate = htonl(tlabel->label.expirationDate); |
| 1200 | tlabel->label.size = htonl(tlabel->label.size); |
| 1201 | tlabel->label.useCount = htonl(tlabel->label.useCount); |
| 1202 | tlabel->label.dumpid = htonl(tlabel->label.dumpid); |
| 1203 | |
| 1204 | /* |
| 1205 | * write the tape label - For appends, the write may need to skip |
| 1206 | * over 1 or 2 EOF marks that were written when tape was closed after |
| 1207 | * the last dump. Plus, some AIX tape drives require we try forwarding |
| 1208 | * over the last EOF and take an error before we can write the new label. |
| 1209 | * ---------------------------------------------------------------------- */ |
| 1210 | code = WriteTapeBlock(info, tapeBlock, BUTM_BLOCKSIZE, BLOCK_LABEL); |
| 1211 | if (!isafile && !rewind && (code == BUTM_IO)) |
| 1212 | do { /* do if write failed */ |
| 1213 | fcode = SeekFile(info, 1); /* skip over the EOF */ |
| 1214 | if (fcode) |
| 1215 | break; /* leave if error */ |
| 1216 | |
| 1217 | code = |
| 1218 | WriteTapeBlock(info, tapeBlock, BUTM_BLOCKSIZE, BLOCK_LABEL); |
| 1219 | if (code != BUTM_IO) |
| 1220 | break; /* continue if write failed */ |
| 1221 | |
| 1222 | fcode = SeekFile(info, 1); /* skip over the EOF */ |
| 1223 | if (fcode) { /* retry 1 write if couldn't skip */ |
| 1224 | code = |
| 1225 | WriteTapeBlock(info, tapeBlock, BUTM_BLOCKSIZE, |
| 1226 | BLOCK_LABEL); |
| 1227 | break; |
| 1228 | } |
| 1229 | |
| 1230 | code = |
| 1231 | WriteTapeBlock(info, tapeBlock, BUTM_BLOCKSIZE, BLOCK_LABEL); |
| 1232 | if (code != BUTM_IO) |
| 1233 | break; /* continue if write failed */ |
| 1234 | |
| 1235 | fcode = SeekFile(info, 1); /* skip over the EOF */ |
| 1236 | if (fcode) { /* retry 1 write if couldn't skip */ |
| 1237 | code = |
| 1238 | WriteTapeBlock(info, tapeBlock, BUTM_BLOCKSIZE, |
| 1239 | BLOCK_LABEL); |
| 1240 | break; |
| 1241 | } |
| 1242 | break; |
| 1243 | } while (0); |
| 1244 | |
| 1245 | /* clear the write error status a failed WriteTapeBlock may have produced */ |
| 1246 | if (!code) |
| 1247 | info->status &= ~BUTM_STATUS_WRITEERROR; |
| 1248 | |
| 1249 | error_exit: |
| 1250 | return code; |
| 1251 | } |
| 1252 | |
| 1253 | static afs_int32 |
| 1254 | file_ReadLabel(struct butm_tapeInfo *info, struct butm_tapeLabel *label, |
| 1255 | afs_int32 rewind) |
| 1256 | { |
| 1257 | struct tapeLabel *tlabel; |
| 1258 | afs_int32 code = 0; |
| 1259 | afs_int32 blockType; |
| 1260 | |
| 1261 | if (info->debug) |
| 1262 | printf("butm: Read tape label\n"); |
| 1263 | |
| 1264 | POLL(); |
| 1265 | info->error = 0; |
| 1266 | |
| 1267 | code = check(info, READ_OP); |
| 1268 | if (code) |
| 1269 | ERROR_EXIT(code); |
| 1270 | if (READS || WRITES) |
| 1271 | ERROR_EXIT(BUTM_BADOP); |
| 1272 | |
| 1273 | if (rewind) { |
| 1274 | code = rewindFile(info); |
| 1275 | if (code) |
| 1276 | ERROR_EXIT(code); /* status is set so return */ |
| 1277 | } |
| 1278 | |
| 1279 | /* |
| 1280 | * When appended labels were written, either 1 or 2 EOF marks may |
| 1281 | * have had to be skipped. When reading a label, these EOF marks |
| 1282 | * must also be skipped. When an EOF is read, 0 bytes are returned |
| 1283 | * (refer to the write calls in file_WriteLabel routine). |
| 1284 | * ---------------------------------------------------------------- */ |
| 1285 | code = ReadTapeBlock(info, tapeBlock, &blockType); |
| 1286 | if (!isafile && !rewind && (blockType == BLOCK_EOF)) |
| 1287 | do { |
| 1288 | code = ReadTapeBlock(info, tapeBlock, &blockType); |
| 1289 | if (blockType != BLOCK_EOF) |
| 1290 | break; /* didn't read an EOF */ |
| 1291 | |
| 1292 | code = ReadTapeBlock(info, tapeBlock, &blockType); |
| 1293 | } while (0); |
| 1294 | |
| 1295 | if (blockType == BLOCK_UNKNOWN) |
| 1296 | ERROR_EXIT(BUTM_NOLABEL); |
| 1297 | if (code) |
| 1298 | ERROR_EXIT(code); |
| 1299 | if (blockType != BLOCK_LABEL) |
| 1300 | ERROR_EXIT(BUTM_BADBLOCK); |
| 1301 | |
| 1302 | /* Copy label out |
| 1303 | * -------------- */ |
| 1304 | if (label) { |
| 1305 | tlabel = (struct tapeLabel *)tapeBlock; |
| 1306 | memcpy(label, &tlabel->label, sizeof(struct butm_tapeLabel)); |
| 1307 | label->structVersion = ntohl(label->structVersion); |
| 1308 | label->creationTime = ntohl(label->creationTime); |
| 1309 | label->expirationDate = ntohl(label->expirationDate); |
| 1310 | label->size = ntohl(label->size); |
| 1311 | label->dumpid = ntohl(label->dumpid); |
| 1312 | label->useCount = ntohl(label->useCount); |
| 1313 | |
| 1314 | info->tapeSize = label->size; /* use size from label */ |
| 1315 | } |
| 1316 | |
| 1317 | error_exit: |
| 1318 | return (code); |
| 1319 | } |
| 1320 | |
| 1321 | static afs_int32 |
| 1322 | file_WriteFileBegin(struct butm_tapeInfo *info) |
| 1323 | { |
| 1324 | afs_int32 code = 0; |
| 1325 | |
| 1326 | if (info->debug) |
| 1327 | printf("butm: Write filemark begin\n"); |
| 1328 | |
| 1329 | POLL(); |
| 1330 | |
| 1331 | code = check(info, WRITE_OP); |
| 1332 | if (code) |
| 1333 | ERROR_EXIT(code); |
| 1334 | |
| 1335 | code = WriteTapeBlock(info, tapeBlock, BUTM_BLOCKSIZE, BLOCK_FMBEGIN); |
| 1336 | if (code) |
| 1337 | ERROR_EXIT(code); |
| 1338 | |
| 1339 | info->nFiles++; |
| 1340 | |
| 1341 | error_exit: |
| 1342 | return (code); |
| 1343 | } |
| 1344 | |
| 1345 | static afs_int32 |
| 1346 | file_ReadFileBegin(struct butm_tapeInfo *info) |
| 1347 | { |
| 1348 | afs_int32 code = 0; |
| 1349 | afs_int32 blockType; |
| 1350 | |
| 1351 | if (info->debug) |
| 1352 | printf("butm: Read filemark begin\n"); |
| 1353 | |
| 1354 | POLL(); |
| 1355 | info->error = 0; |
| 1356 | |
| 1357 | code = check(info, READ_OP); |
| 1358 | if (code) |
| 1359 | ERROR_EXIT(code); |
| 1360 | if (READS || WRITES) |
| 1361 | ERROR_EXIT(BUTM_BADOP); |
| 1362 | |
| 1363 | code = ReadTapeBlock(info, tapeBlock, &blockType); |
| 1364 | if (code) |
| 1365 | ERROR_EXIT(code); |
| 1366 | |
| 1367 | if (blockType != BLOCK_FMBEGIN) { |
| 1368 | if (blockType == BLOCK_EOD) |
| 1369 | ERROR_EXIT(BUTM_EOD); /* EODump label */ |
| 1370 | if (blockType == BLOCK_LABEL) |
| 1371 | ERROR_EXIT(BUTM_LABEL); /* Tape label */ |
| 1372 | ERROR_EXIT(BUTM_BADBLOCK); /* Other */ |
| 1373 | } |
| 1374 | |
| 1375 | error_exit: |
| 1376 | return (code); |
| 1377 | } |
| 1378 | |
| 1379 | /* Writes data out in block sizes of 16KB. Does destroy the data. |
| 1380 | * Assumes the data buffer has a space reserved at beginning for a blockMark. |
| 1381 | */ |
| 1382 | static afs_int32 |
| 1383 | file_WriteFileData(struct butm_tapeInfo *info, char *data, afs_int32 blocks, afs_int32 len) |
| 1384 | { |
| 1385 | afs_int32 code = 0; |
| 1386 | int length; |
| 1387 | afs_int32 b; |
| 1388 | char *bstart; /* Where block starts for a 16K block */ |
| 1389 | char *dstart; /* Where data starts for a 16K block */ |
| 1390 | |
| 1391 | if (info->debug) |
| 1392 | printf("butm: Write tape data - %u bytes\n", len); |
| 1393 | |
| 1394 | POLL(); |
| 1395 | info->error = 0; |
| 1396 | |
| 1397 | code = check(info, WRITE_OP); |
| 1398 | if (code) |
| 1399 | ERROR_EXIT(code); |
| 1400 | if (!data || (len < 0)) |
| 1401 | ERROR_EXIT(BUTM_BADARGUMENT); |
| 1402 | if (READS || !WRITES) |
| 1403 | ERROR_EXIT(BUTM_BADOP); |
| 1404 | |
| 1405 | b = 0; /* start at block 0 */ |
| 1406 | while (len > 0) { |
| 1407 | dstart = &data[b * BUTM_BLKSIZE]; |
| 1408 | bstart = dstart - sizeof(struct blockMark); |
| 1409 | |
| 1410 | if (len < BUTM_BLKSIZE) { |
| 1411 | memset(&dstart[len], 0, BUTM_BLKSIZE - len); |
| 1412 | length = len; |
| 1413 | } else { |
| 1414 | length = BUTM_BLKSIZE; |
| 1415 | } |
| 1416 | |
| 1417 | code = WriteTapeBlock(info, bstart, length, BLOCK_DATA); |
| 1418 | |
| 1419 | len -= length; |
| 1420 | |
| 1421 | /* If there are more blocks, step to next block */ |
| 1422 | /* Otherwise, copy the data to beginning of last block */ |
| 1423 | |
| 1424 | if (b < (blocks - 1)) |
| 1425 | b++; |
| 1426 | else if (len) |
| 1427 | memcpy(&dstart[0], &dstart[BUTM_BLKSIZE], len); |
| 1428 | } |
| 1429 | |
| 1430 | error_exit: |
| 1431 | return (code); |
| 1432 | } |
| 1433 | |
| 1434 | /* file_ReadFileData |
| 1435 | * Read a data block from tape. |
| 1436 | * entry: |
| 1437 | * info - tape info structure, c.f. fid |
| 1438 | * data - ptr to buffer for data |
| 1439 | * len - size of data buffer |
| 1440 | * exit: |
| 1441 | * nBytes - no. of data bytes read. |
| 1442 | */ |
| 1443 | |
| 1444 | static afs_int32 |
| 1445 | file_ReadFileData(struct butm_tapeInfo *info, char *data, int len, int *nBytes) |
| 1446 | { |
| 1447 | struct blockMark *bmark; |
| 1448 | afs_int32 code = 0; |
| 1449 | afs_int32 blockType; |
| 1450 | |
| 1451 | if (info->debug) |
| 1452 | printf("butm: Read tape data - %u bytes\n", len); |
| 1453 | |
| 1454 | POLL(); |
| 1455 | info->error = 0; |
| 1456 | |
| 1457 | if (!nBytes) |
| 1458 | ERROR_EXIT(BUTM_BADARGUMENT); |
| 1459 | *nBytes = 0; |
| 1460 | |
| 1461 | code = check(info, READ_OP); |
| 1462 | if (code) |
| 1463 | ERROR_EXIT(code); |
| 1464 | if (!data || (len < 0) || (len > BUTM_BLKSIZE)) |
| 1465 | ERROR_EXIT(BUTM_BADARGUMENT); |
| 1466 | if (!READS || WRITES) |
| 1467 | ERROR_EXIT(BUTM_BADOP); |
| 1468 | |
| 1469 | data -= sizeof(struct blockMark); |
| 1470 | code = ReadTapeBlock(info, data, &blockType); |
| 1471 | if (code) |
| 1472 | ERROR_EXIT(code); |
| 1473 | |
| 1474 | if (blockType != BLOCK_DATA) { |
| 1475 | if (blockType == BLOCK_EOF) |
| 1476 | ERROR_EXIT(BUTM_EOF); |
| 1477 | if (blockType == BLOCK_FMEND) |
| 1478 | ERROR_EXIT(BUTM_ENDVOLUME); |
| 1479 | ERROR_EXIT(BUTM_BADBLOCK); |
| 1480 | } |
| 1481 | |
| 1482 | bmark = (struct blockMark *)data; |
| 1483 | *nBytes = ntohl(bmark->count); /* Size of data in buf */ |
| 1484 | |
| 1485 | error_exit: |
| 1486 | return (code); |
| 1487 | } |
| 1488 | |
| 1489 | static afs_int32 |
| 1490 | file_WriteFileEnd(struct butm_tapeInfo *info) |
| 1491 | { |
| 1492 | afs_int32 code = 0; |
| 1493 | |
| 1494 | if (info->debug) |
| 1495 | printf("butm: Write filemark end\n"); |
| 1496 | |
| 1497 | POLL(); |
| 1498 | info->error = 0; |
| 1499 | |
| 1500 | code = check(info, WRITE_OP); |
| 1501 | if (code) |
| 1502 | ERROR_EXIT(code); |
| 1503 | if (READS || !WRITES) |
| 1504 | ERROR_EXIT(BUTM_BADOP); |
| 1505 | |
| 1506 | code = WriteTapeBlock(info, tapeBlock, BUTM_BLOCKSIZE, BLOCK_FMEND); |
| 1507 | |
| 1508 | error_exit: |
| 1509 | return (code); |
| 1510 | } |
| 1511 | |
| 1512 | /* Read a SW filemark, verify that it is a SW filemark, then skip to the next |
| 1513 | * HW filemark. If the read of the SW filemark shows it's an EOF, then |
| 1514 | * ignore that the SW filemark is not there and return 0 (found the SW filemark |
| 1515 | * missing with some 3.1 dumps). |
| 1516 | */ |
| 1517 | static afs_int32 |
| 1518 | file_ReadFileEnd(struct butm_tapeInfo *info) |
| 1519 | { |
| 1520 | afs_int32 code = 0; |
| 1521 | afs_int32 blockType; |
| 1522 | |
| 1523 | if (info->debug) |
| 1524 | printf("butm: Read filemark end\n"); |
| 1525 | |
| 1526 | POLL(); |
| 1527 | info->error = 0; |
| 1528 | |
| 1529 | code = check(info, READ_OP); |
| 1530 | if (code) |
| 1531 | ERROR_EXIT(code); |
| 1532 | if (!READS || WRITES) |
| 1533 | ERROR_EXIT(BUTM_BADOP); |
| 1534 | |
| 1535 | info->status &= ~BUTM_STATUS_EOF; |
| 1536 | |
| 1537 | code = ReadTapeBlock(info, tapeBlock, &blockType); |
| 1538 | if (code) |
| 1539 | ERROR_EXIT(code); |
| 1540 | |
| 1541 | if ((blockType != BLOCK_FMEND) && (blockType != BLOCK_EOF)) |
| 1542 | ERROR_EXIT(BUTM_BADBLOCK); |
| 1543 | |
| 1544 | error_exit: |
| 1545 | return code; |
| 1546 | } |
| 1547 | |
| 1548 | /* |
| 1549 | * Write the end-of-dump marker. |
| 1550 | */ |
| 1551 | static afs_int32 |
| 1552 | file_WriteEODump(struct butm_tapeInfo *info) |
| 1553 | { |
| 1554 | afs_int32 code = 0; |
| 1555 | |
| 1556 | if (info->debug) |
| 1557 | printf("butm: Write filemark EOD\n"); |
| 1558 | |
| 1559 | POLL(); |
| 1560 | info->error = 0; |
| 1561 | |
| 1562 | code = check(info, WRITE_OP); |
| 1563 | if (code) |
| 1564 | ERROR_EXIT(code); |
| 1565 | if (READS || WRITES) |
| 1566 | ERROR_EXIT(BUTM_BADOP); |
| 1567 | |
| 1568 | code = WriteTapeBlock(info, tapeBlock, BUTM_BLOCKSIZE, BLOCK_EOD); |
| 1569 | if (code) |
| 1570 | ERROR_EXIT(code); |
| 1571 | |
| 1572 | info->status |= BUTM_STATUS_EOD; |
| 1573 | |
| 1574 | error_exit: |
| 1575 | return (code); |
| 1576 | } |
| 1577 | |
| 1578 | static afs_int32 |
| 1579 | file_Seek(struct butm_tapeInfo *info, afs_int32 position) |
| 1580 | { |
| 1581 | afs_int32 code = 0; |
| 1582 | afs_int32 w; |
| 1583 | osi_lloff_t posit; |
| 1584 | struct progress *p; |
| 1585 | afs_int64 stopOff; /* for normal file(non-tape) seeks */ |
| 1586 | |
| 1587 | if (info->debug) |
| 1588 | printf("butm: Seek to the tape position %d\n", position); |
| 1589 | |
| 1590 | info->error = 0; |
| 1591 | |
| 1592 | code = check(info, READ_OP); |
| 1593 | if (code) |
| 1594 | ERROR_EXIT(code); |
| 1595 | |
| 1596 | if (isafile) { |
| 1597 | p = (struct progress *)info->tmRock; |
| 1598 | posit = (osi_lloff_t) position *(osi_lloff_t) BUTM_BLOCKSIZE; |
| 1599 | |
| 1600 | w = USD_SEEK(p->fid, posit, SEEK_SET, &stopOff); |
| 1601 | if (w) |
| 1602 | info->error = w; |
| 1603 | if (posit != stopOff) |
| 1604 | ERROR_EXIT(BUTM_POSITION); |
| 1605 | |
| 1606 | p->reading = p->writing = 0; |
| 1607 | info->position = position; |
| 1608 | } else { |
| 1609 | /* Don't position backwards if we are in-between FMs */ |
| 1610 | if ((READS || WRITES) && ((position - info->position) <= 0)) |
| 1611 | ERROR_EXIT(BUTM_BADOP); |
| 1612 | |
| 1613 | code = SeekFile(info, (position - info->position)); |
| 1614 | if (code) |
| 1615 | ERROR_EXIT(code); |
| 1616 | } |
| 1617 | |
| 1618 | error_exit: |
| 1619 | return (code); |
| 1620 | } |
| 1621 | |
| 1622 | /* |
| 1623 | * Seek to the EODump (end-of-dump) after the given position. This is |
| 1624 | * the position after the EOF filemark immediately after the EODump mark. |
| 1625 | * This is for tapes of version 4 or greater. |
| 1626 | */ |
| 1627 | static afs_int32 |
| 1628 | file_SeekEODump(struct butm_tapeInfo *info, afs_int32 position) |
| 1629 | { |
| 1630 | afs_int32 code = 0; |
| 1631 | afs_int32 blockType; |
| 1632 | afs_int32 w; |
| 1633 | struct progress *p; |
| 1634 | afs_int64 stopOff; /* file seek offsets */ |
| 1635 | |
| 1636 | if (info->debug) |
| 1637 | printf("butm: Seek to end-of-dump\n"); |
| 1638 | info->error = 0; |
| 1639 | |
| 1640 | code = check(info, READ_OP); |
| 1641 | if (code) |
| 1642 | ERROR_EXIT(code); |
| 1643 | if (READS || WRITES) |
| 1644 | ERROR_EXIT(BUTM_BADOP); |
| 1645 | |
| 1646 | if (isafile) { |
| 1647 | p = (struct progress *)info->tmRock; |
| 1648 | w = USD_SEEK(p->fid, 0, SEEK_END, &stopOff); |
| 1649 | if (w) { |
| 1650 | info->error = w; |
| 1651 | ERROR_EXIT(BUTM_POSITION); |
| 1652 | } |
| 1653 | |
| 1654 | if (stopOff % BUTM_BLOCKSIZE) |
| 1655 | ERROR_EXIT(BUTM_POSITION); |
| 1656 | info->position = (stopOff / BUTM_BLOCKSIZE); |
| 1657 | } else { |
| 1658 | /* Seek to the desired position */ |
| 1659 | code = SeekFile(info, (position - info->position) + 1); |
| 1660 | if (code) |
| 1661 | ERROR_EXIT(code); |
| 1662 | |
| 1663 | /* |
| 1664 | * Search until the filemark is an EODump filemark. |
| 1665 | * Skip over volumes only. |
| 1666 | */ |
| 1667 | while (1) { |
| 1668 | code = ReadTapeBlock(info, tapeBlock, &blockType); |
| 1669 | if (code) |
| 1670 | ERROR_EXIT(code); |
| 1671 | |
| 1672 | if (blockType == BLOCK_EOD) |
| 1673 | break; |
| 1674 | if (blockType != BLOCK_FMBEGIN) |
| 1675 | ERROR_EXIT(BUTM_BADBLOCK); |
| 1676 | |
| 1677 | code = SeekFile(info, 1); /* Step forward to next volume */ |
| 1678 | if (code) |
| 1679 | ERROR_EXIT(code); |
| 1680 | } |
| 1681 | code = 0; |
| 1682 | } |
| 1683 | |
| 1684 | error_exit: |
| 1685 | return (code); |
| 1686 | } |
| 1687 | |
| 1688 | static afs_int32 |
| 1689 | file_SetSize(struct butm_tapeInfo *info, afs_uint32 size) |
| 1690 | { |
| 1691 | if (info->debug) |
| 1692 | printf("butm: Set size of tape\n"); |
| 1693 | info->error = 0; |
| 1694 | |
| 1695 | if (size <= 0) |
| 1696 | info->tapeSize = config.tapeSize; |
| 1697 | else |
| 1698 | info->tapeSize = size; |
| 1699 | return 0; |
| 1700 | } |
| 1701 | |
| 1702 | static afs_int32 |
| 1703 | file_GetSize(struct butm_tapeInfo *info, afs_uint32 *size) |
| 1704 | { |
| 1705 | if (info->debug) |
| 1706 | printf("butm: Get size of tape\n"); |
| 1707 | info->error = 0; |
| 1708 | |
| 1709 | *size = info->tapeSize; |
| 1710 | return 0; |
| 1711 | } |
| 1712 | |
| 1713 | /* ===================================================================== |
| 1714 | * Startup/configuration routines. |
| 1715 | * ===================================================================== */ |
| 1716 | |
| 1717 | static afs_int32 |
| 1718 | file_Configure(struct tapeConfig *file) |
| 1719 | { |
| 1720 | if (!file) { |
| 1721 | afs_com_err(whoami, BUTM_BADCONFIG, "device not specified"); |
| 1722 | return BUTM_BADCONFIG; |
| 1723 | } |
| 1724 | |
| 1725 | config.tapeSize = file->capacity; |
| 1726 | config.fileMarkSize = file->fileMarkSize; |
| 1727 | config.portOffset = file->portOffset; |
| 1728 | strcpy(config.tapedir, file->device); |
| 1729 | |
| 1730 | /* Tape must be large enough to at least fit a label */ |
| 1731 | if (config.tapeSize <= 0) { |
| 1732 | afs_com_err(whoami, BUTM_BADCONFIG, "Tape size bogus: %d Kbytes", |
| 1733 | config.tapeSize); |
| 1734 | return BUTM_BADCONFIG; |
| 1735 | } |
| 1736 | |
| 1737 | if (strlen(config.tapedir) == 0) { |
| 1738 | afs_com_err(whoami, BUTM_BADCONFIG, "no tape device specified"); |
| 1739 | return BUTM_BADCONFIG; |
| 1740 | } |
| 1741 | |
| 1742 | config.mountId = 0; |
| 1743 | return 0; |
| 1744 | } |
| 1745 | |
| 1746 | /* This procedure instantiates a tape module of type file_tm. */ |
| 1747 | afs_int32 |
| 1748 | butm_file_Instantiate(struct butm_tapeInfo *info, struct tapeConfig *file) |
| 1749 | { |
| 1750 | extern int debugLevel; |
| 1751 | afs_int32 code = 0; |
| 1752 | |
| 1753 | if (debugLevel > 98) |
| 1754 | printf("butm: Instantiate butc\n"); |
| 1755 | |
| 1756 | if (!info) |
| 1757 | ERROR_EXIT(BUTM_BADARGUMENT); |
| 1758 | if (info->structVersion != BUTM_MAJORVERSION) |
| 1759 | ERROR_EXIT(BUTM_OLDINTERFACE); |
| 1760 | |
| 1761 | memset(info, 0, sizeof(struct butm_tapeInfo)); |
| 1762 | info->structVersion = BUTM_MAJORVERSION; |
| 1763 | info->ops.mount = file_Mount; |
| 1764 | info->ops.dismount = file_Dismount; |
| 1765 | info->ops.create = file_WriteLabel; |
| 1766 | info->ops.readLabel = file_ReadLabel; |
| 1767 | info->ops.seek = file_Seek; |
| 1768 | info->ops.seekEODump = file_SeekEODump; |
| 1769 | info->ops.readFileBegin = file_ReadFileBegin; |
| 1770 | info->ops.readFileData = file_ReadFileData; |
| 1771 | info->ops.readFileEnd = file_ReadFileEnd; |
| 1772 | info->ops.writeFileBegin = file_WriteFileBegin; |
| 1773 | info->ops.writeFileData = file_WriteFileData; |
| 1774 | info->ops.writeFileEnd = file_WriteFileEnd; |
| 1775 | info->ops.writeEOT = file_WriteEODump; |
| 1776 | info->ops.setSize = file_SetSize; |
| 1777 | info->ops.getSize = file_GetSize; |
| 1778 | info->debug = ((debugLevel > 98) ? 1 : 0); |
| 1779 | |
| 1780 | code = file_Configure(file); |
| 1781 | |
| 1782 | error_exit: |
| 1783 | return code; |
| 1784 | } |