2 Bacula® - The Network Backup Solution
4 Copyright (C) 2000-2009 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version two of the GNU General Public
10 License as published by the Free Software Foundation and included
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of Kern Sibbald.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
29 * Definitions for using the Device functions in Bacula
30 * Tape and File storage access
39 * Some details of how volume and device reservations work
42 * set_in_use() volume being used on current drive
43 * clear_in_use() no longer being used. Can be re-used or moved.
44 * set_swapping() set volume being moved to another drive
45 * is_swapping() volume is being moved to another drive
46 * clear_swapping() volume normal
49 * set_load() set to load volume
50 * needs_load() volume must be loaded (i.e. set_load done)
51 * clear_load() load done.
52 * set_unload() set to unload volume
53 * needs_unload() volume must be unloaded
54 * clear_unload() volume unloaded
56 * reservations are temporary until the drive is acquired
57 * inc_reserved() increments num of reservations
58 * dec_reserved() decrements num of reservations
59 * num_reserved() number of reservations
62 * set_reserved() sets local reserve flag and calls dev->inc_reserved()
63 * clear_reserved() clears local reserve flag and calls dev->dec_reserved()
64 * is_reserved() returns local reserved flag
65 * unreserve_device() much more complete unreservation
73 #undef DCR /* used by Bacula */
75 /* Return values from wait_for_sysop() */
84 /* Arguments to open_dev() */
86 CREATE_READ_WRITE = 1,
98 B_VTAPE_DEV, /* change to B_TAPE_DEV after init */
102 /* Generic status bits returned from status_dev() */
103 #define BMT_TAPE (1<<0) /* is tape device */
104 #define BMT_EOF (1<<1) /* just read EOF */
105 #define BMT_BOT (1<<2) /* at beginning of tape */
106 #define BMT_EOT (1<<3) /* end of tape reached */
107 #define BMT_SM (1<<4) /* DDS setmark */
108 #define BMT_EOD (1<<5) /* DDS at end of data */
109 #define BMT_WR_PROT (1<<6) /* tape write protected */
110 #define BMT_ONLINE (1<<7) /* tape online */
111 #define BMT_DR_OPEN (1<<8) /* tape door open */
112 #define BMT_IM_REP_EN (1<<9) /* immediate report enabled */
115 /* Bits for device capabilities */
116 #define CAP_EOF (1<<0) /* has MTWEOF */
117 #define CAP_BSR (1<<1) /* has MTBSR */
118 #define CAP_BSF (1<<2) /* has MTBSF */
119 #define CAP_FSR (1<<3) /* has MTFSR */
120 #define CAP_FSF (1<<4) /* has MTFSF */
121 #define CAP_EOM (1<<5) /* has MTEOM */
122 #define CAP_REM (1<<6) /* is removable media */
123 #define CAP_RACCESS (1<<7) /* is random access device */
124 #define CAP_AUTOMOUNT (1<<8) /* Read device at start to see what is there */
125 #define CAP_LABEL (1<<9) /* Label blank tapes */
126 #define CAP_ANONVOLS (1<<10) /* Mount without knowing volume name */
127 #define CAP_ALWAYSOPEN (1<<11) /* always keep device open */
128 #define CAP_AUTOCHANGER (1<<12) /* AutoChanger */
129 #define CAP_OFFLINEUNMOUNT (1<<13) /* Offline before unmount */
130 #define CAP_STREAM (1<<14) /* Stream device */
131 #define CAP_BSFATEOM (1<<15) /* Backspace file at EOM */
132 #define CAP_FASTFSF (1<<16) /* Fast forward space file */
133 #define CAP_TWOEOF (1<<17) /* Write two eofs for EOM */
134 #define CAP_CLOSEONPOLL (1<<18) /* Close device on polling */
135 #define CAP_POSITIONBLOCKS (1<<19) /* Use block positioning */
136 #define CAP_MTIOCGET (1<<20) /* Basic support for fileno and blkno */
137 #define CAP_REQMOUNT (1<<21) /* Require mount to read files back (typically: DVD) */
138 #define CAP_CHECKLABELS (1<<22) /* Check for ANSI/IBM labels */
139 #define CAP_BLOCKCHECKSUM (1<<23) /* Create/test block checksum */
142 #define dev_state(dev, st_state) ((dev)->state & (st_state))
144 /* Device state bits */
145 #define ST_XXXXXX (1<<0) /* was ST_OPENED */
146 #define ST_XXXXX (1<<1) /* was ST_TAPE */
147 #define ST_XXXX (1<<2) /* was ST_FILE */
148 #define ST_XXX (1<<3) /* was ST_FIFO */
149 #define ST_XX (1<<4) /* was ST_DVD */
150 #define ST_X (1<<5) /* was ST_PROG */
152 #define ST_LABEL (1<<6) /* label found */
153 #define ST_MALLOC (1<<7) /* dev packet malloc'ed in init_dev() */
154 #define ST_APPEND (1<<8) /* ready for Bacula append */
155 #define ST_READ (1<<9) /* ready for Bacula read */
156 #define ST_EOT (1<<10) /* at end of tape */
157 #define ST_WEOT (1<<11) /* Got EOT on write */
158 #define ST_EOF (1<<12) /* Read EOF i.e. zero bytes */
159 #define ST_NEXTVOL (1<<13) /* Start writing on next volume */
160 #define ST_SHORT (1<<14) /* Short block read */
161 #define ST_MOUNTED (1<<15) /* the device is mounted to the mount point */
162 #define ST_MEDIA (1<<16) /* Media found in mounted device */
163 #define ST_OFFLINE (1<<17) /* set offline by operator */
164 #define ST_PART_SPOOLED (1<<18) /* spooling part */
165 #define ST_FREESPACE_OK (1<<19) /* Have valid freespace for DVD */
168 /* Volume Catalog Information structure definition */
169 struct VOLUME_CAT_INFO {
170 /* Media info for the current Volume */
171 uint32_t VolCatJobs; /* number of jobs on this Volume */
172 uint32_t VolCatFiles; /* Number of files */
173 uint32_t VolCatBlocks; /* Number of blocks */
174 uint64_t VolCatBytes; /* Number of bytes written */
175 uint32_t VolCatParts; /* Number of parts written */
176 uint32_t VolCatMounts; /* Number of mounts this volume */
177 uint32_t VolCatErrors; /* Number of errors this volume */
178 uint32_t VolCatWrites; /* Number of writes this volume */
179 uint32_t VolCatReads; /* Number of reads this volume */
180 uint64_t VolCatRBytes; /* Number of bytes read */
181 uint32_t VolCatRecycles; /* Number of recycles this volume */
182 uint32_t EndFile; /* Last file number */
183 uint32_t EndBlock; /* Last block number */
184 int32_t LabelType; /* Bacula/ANSI/IBM */
185 int32_t Slot; /* >0=Slot loaded, 0=nothing, -1=unknown */
186 uint32_t VolCatMaxJobs; /* Maximum Jobs to write to volume */
187 uint32_t VolCatMaxFiles; /* Maximum files to write to volume */
188 uint64_t VolCatMaxBytes; /* Max bytes to write to volume */
189 uint64_t VolCatCapacityBytes; /* capacity estimate */
190 btime_t VolReadTime; /* time spent reading */
191 btime_t VolWriteTime; /* time spent writing this Volume */
192 int64_t VolMediaId; /* MediaId */
193 utime_t VolFirstWritten; /* Time of first write */
194 utime_t VolLastWritten; /* Time of last write */
195 bool InChanger; /* Set if vol in current magazine */
196 char VolCatStatus[20]; /* Volume status */
197 char VolCatName[MAX_NAME_LENGTH]; /* Desired volume to mount */
201 class DEVRES; /* Device resource defined in stored_conf.h */
202 class DCR; /* forward reference */
203 class VOLRES; /* forward reference */
206 * Device structure definition. There is one of these for
207 * each physical device. Everything here is "global" to
208 * that device and effects all jobs using the device.
212 int m_fd; /* file descriptor */
213 int m_blocked; /* set if we must wait (i.e. change tape) */
214 int m_count; /* Mutex use count -- DEBUG only */
215 int m_num_reserved; /* counter of device reservations */
216 int32_t m_slot; /* slot loaded in drive or -1 if none */
217 pthread_t m_pid; /* Thread that locked -- DEBUG only */
218 bool m_unload; /* set when Volume must be unloaded */
219 bool m_load; /* set when Volume must be loaded */
222 DEVICE * volatile swap_dev; /* Swap vol from this device */
223 dlist *attached_dcrs; /* attached DCR list */
224 pthread_mutex_t m_mutex; /* access control */
225 pthread_mutex_t spool_mutex; /* mutex for updating spool_size */
226 pthread_mutex_t acquire_mutex; /* mutex for acquire code */
227 pthread_cond_t wait; /* thread wait variable */
228 pthread_cond_t wait_next_vol; /* wait for tape to be mounted */
229 pthread_t no_wait_id; /* this thread must not wait */
230 int dev_prev_blocked; /* previous blocked state */
231 int num_waiting; /* number of threads waiting */
232 int num_writers; /* number of writing threads */
233 int capabilities; /* capabilities mask */
234 int state; /* state mask */
235 int dev_errno; /* Our own errno */
236 int mode; /* read/write modes */
237 int openmode; /* parameter passed to open_dev (useful to reopen the device) */
238 int dev_type; /* device type */
239 bool autoselect; /* Autoselect in autochanger */
240 bool initiated; /* set when init_dev() called */
241 int label_type; /* Bacula/ANSI/IBM label types */
242 uint32_t drive_index; /* Autochanger drive index (base 0) */
243 POOLMEM *dev_name; /* Physical device name */
244 POOLMEM *prt_name; /* Name used for display purposes */
245 char *errmsg; /* nicely edited error message */
246 uint32_t block_num; /* current block number base 0 */
247 uint32_t LastBlock; /* last DEV_BLOCK number written to Volume */
248 uint32_t file; /* current file number base 0 */
249 uint64_t file_addr; /* Current file read/write address */
250 uint64_t file_size; /* Current file size */
251 uint32_t EndBlock; /* last block written */
252 uint32_t EndFile; /* last file written */
253 uint32_t min_block_size; /* min block size */
254 uint32_t max_block_size; /* max block size */
255 uint64_t max_volume_size; /* max bytes to put on one volume */
256 uint64_t max_file_size; /* max file size to put in one file on volume */
257 uint64_t max_concurrent_jobs; /* maximum simultaneous jobs this drive */
258 uint64_t volume_capacity; /* advisory capacity */
259 uint64_t max_spool_size; /* maximum spool file size */
260 uint64_t spool_size; /* current spool size for this device */
261 uint32_t max_rewind_wait; /* max secs to allow for rewind */
262 uint32_t max_open_wait; /* max secs to allow for open */
263 uint32_t max_open_vols; /* max simultaneous open volumes */
265 uint64_t max_part_size; /* max part size */
266 uint64_t part_size; /* current part size */
267 uint32_t part; /* current part number (starts at 0) */
268 uint64_t part_start; /* current part start address (relative to the whole volume) */
269 uint32_t num_dvd_parts; /* number of parts WRITTEN on the DVD */
270 /* state ST_FREESPACE_OK is set if free_space is valid */
271 uint64_t free_space; /* current free space on medium (without the current part) */
272 int free_space_errno; /* indicates errno getting freespace */
273 bool truncating; /* if set, we are currently truncating the DVD */
274 bool blank_dvd; /* if set, we have a blank DVD in the drive */
277 utime_t vol_poll_interval; /* interval between polling Vol mount */
278 DEVRES *device; /* pointer to Device Resource */
279 VOLRES *vol; /* Pointer to Volume reservation item */
280 btimer_t *tid; /* timer id */
282 VOLUME_CAT_INFO VolCatInfo; /* Volume Catalog Information */
283 VOLUME_LABEL VolHdr; /* Actual volume label */
284 char pool_name[MAX_NAME_LENGTH]; /* pool name */
285 char pool_type[MAX_NAME_LENGTH]; /* pool type */
287 char UnloadVolName[MAX_NAME_LENGTH]; /* Last wrong Volume mounted */
288 bool poll; /* set to poll Volume */
289 /* Device wait times ***FIXME*** look at durations */
297 btime_t last_timer; /* used by read/write/seek to get stats (usec) */
298 btime_t last_tick; /* contains last read/write time (usec) */
301 btime_t DevWriteTime;
302 uint64_t DevWriteBytes;
303 uint64_t DevReadBytes;
306 btime_t get_timer_count(); /* return the last timer interval (ms) */
308 int has_cap(int cap) const { return capabilities & cap; }
309 void clear_cap(int cap) { capabilities &= ~cap; }
310 void set_cap(int cap) { capabilities |= cap; }
311 bool do_checksum() const { return (capabilities & CAP_BLOCKCHECKSUM) != 0; }
312 int is_autochanger() const { return capabilities & CAP_AUTOCHANGER; }
313 int requires_mount() const { return capabilities & CAP_REQMOUNT; }
314 int is_removable() const { return capabilities & CAP_REM; }
315 int is_tape() const { return (dev_type == B_TAPE_DEV ||
316 dev_type == B_VTAPE_DEV); }
317 int is_file() const { return dev_type == B_FILE_DEV; }
318 int is_fifo() const { return dev_type == B_FIFO_DEV; }
319 int is_dvd() const { return dev_type == B_DVD_DEV; }
320 int is_vtl() const { return dev_type == B_VTL_DEV; }
321 int is_vtape() const { return dev_type == B_VTAPE_DEV; }
322 int is_open() const { return m_fd >= 0; }
323 int is_offline() const { return state & ST_OFFLINE; }
324 int is_labeled() const { return state & ST_LABEL; }
325 int is_mounted() const { return state & ST_MOUNTED; }
326 int is_unmountable() const { return (is_dvd() || (is_file() && is_removable())); }
327 int num_reserved() const { return m_num_reserved; };
328 int is_part_spooled() const { return state & ST_PART_SPOOLED; }
329 int have_media() const { return state & ST_MEDIA; }
330 int is_short_block() const { return state & ST_SHORT; }
331 int is_busy() const { return (state & ST_READ) || num_writers || num_reserved(); }
332 int at_eof() const { return state & ST_EOF; }
333 int at_eot() const { return state & ST_EOT; }
334 int at_weot() const { return state & ST_WEOT; }
335 int can_append() const { return state & ST_APPEND; }
336 int is_freespace_ok() const { return state & ST_FREESPACE_OK; }
338 * can_write() is meant for checking at the end of a job to see
339 * if we still have a tape (perhaps not if at end of tape
340 * and the job is canceled).
342 int can_write() const { return is_open() && can_append() &&
343 is_labeled() && !at_weot(); }
344 int can_read() const { return state & ST_READ; }
345 bool can_steal_lock() const { return m_blocked &&
346 (m_blocked == BST_UNMOUNTED ||
347 m_blocked == BST_WAITING_FOR_SYSOP ||
348 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
349 bool waiting_for_mount() const { return
350 (m_blocked == BST_UNMOUNTED ||
351 m_blocked == BST_WAITING_FOR_SYSOP ||
352 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
353 bool must_unload() const { return m_unload; };
354 bool must_load() const { return m_load; };
355 const char *strerror() const;
356 const char *archive_name() const;
357 const char *name() const;
358 const char *print_name() const; /* Name for display purposes */
359 void set_ateof(); /* in dev.c */
360 void set_ateot(); /* in dev.c */
361 void set_eot() { state |= ST_EOT; };
362 void set_eof() { state |= ST_EOF; };
363 void set_append() { state |= ST_APPEND; };
364 void set_labeled() { state |= ST_LABEL; };
365 inline void set_read() { state |= ST_READ; };
366 void set_offline() { state |= ST_OFFLINE; };
367 void set_mounted() { state |= ST_MOUNTED; };
368 void set_media() { state |= ST_MEDIA; };
369 void set_short_block() { state |= ST_SHORT; };
370 void set_freespace_ok() { state |= ST_FREESPACE_OK; }
371 void set_part_spooled(int val) { if (val) state |= ST_PART_SPOOLED; \
372 else state &= ~ST_PART_SPOOLED;
374 bool is_volume_to_unload() const { \
375 return m_unload && strcmp(VolHdr.VolumeName, UnloadVolName) == 0; };
376 void set_load() { m_load = true; };
377 void inc_reserved() { m_num_reserved++; }
378 void set_mounted(int val) { if (val) state |= ST_MOUNTED; \
379 else state &= ~ST_MOUNTED; };
380 void dec_reserved() { m_num_reserved--; ASSERT(m_num_reserved>=0); };
381 void clear_append() { state &= ~ST_APPEND; };
382 void clear_read() { state &= ~ST_READ; };
383 void clear_labeled() { state &= ~ST_LABEL; };
384 void clear_offline() { state &= ~ST_OFFLINE; };
385 void clear_eot() { state &= ~ST_EOT; };
386 void clear_eof() { state &= ~ST_EOF; };
387 void clear_opened() { m_fd = -1; };
388 void clear_mounted() { state &= ~ST_MOUNTED; };
389 void clear_media() { state &= ~ST_MEDIA; };
390 void clear_short_block() { state &= ~ST_SHORT; };
391 void clear_freespace_ok() { state &= ~ST_FREESPACE_OK; };
392 void clear_unload() { m_unload = false; UnloadVolName[0] = 0; };
393 void clear_load() { m_load = false; };
394 char *bstrerror(void) { return errmsg; };
395 char *print_errmsg() { return errmsg; };
396 int32_t get_slot() const { return m_slot; };
398 void set_unload(); /* in dev.c */
399 void clear_volhdr(); /* in dev.c */
400 void close(); /* in dev.c */
401 void close_part(DCR *dcr); /* in dev.c */
402 bool truncate(DCR *dcr); /* in dev.c */
403 int open(DCR *dcr, int mode); /* in dev.c */
404 void term(void); /* in dev.c */
405 ssize_t read(void *buf, size_t len); /* in dev.c */
406 ssize_t write(const void *buf, size_t len); /* in dev.c */
407 bool rewind(DCR *dcr); /* in dev.c */
408 bool mount(int timeout); /* in dev.c */
409 bool unmount(int timeout); /* in dev.c */
410 void edit_mount_codes(POOL_MEM &omsg, const char *imsg); /* in dev.c */
411 bool offline_or_rewind(); /* in dev.c */
412 bool offline(); /* in dev.c */
413 bool bsf(int count); /* in dev.c */
414 bool eod(DCR *dcr); /* in dev.c */
415 bool fsr(int num); /* in dev.c */
416 bool fsf(int num); /* in dev.c */
417 bool bsr(int num); /* in dev.c */
418 bool weof(int num); /* in dev.c */
419 void lock_door(); /* in dev.c */
420 void unlock_door(); /* in dev.c */
421 int32_t get_os_tape_file(); /* in dev.c */
422 bool scan_dir_for_volume(DCR *dcr); /* in scan.c */
423 bool reposition(DCR *dcr, uint32_t rfile, uint32_t rblock); /* in dev.c */
424 void clrerror(int func); /* in dev.c */
425 boffset_t lseek(DCR *dcr, boffset_t offset, int whence); /* in dev.c */
426 bool update_pos(DCR *dcr); /* in dev.c */
427 void set_slot(int32_t slot); /* in dev.c */
428 void clear_slot(); /* in dev.c */
431 bool update_freespace(); /* in dvd.c */
433 uint32_t get_file() const { return file; };
434 uint32_t get_block_num() const { return block_num; };
435 int fd() const { return m_fd; };
437 /* low level operations */
439 int (*d_open)(const char *pathname, int flags, ...);
440 int (*d_close)(int fd);
441 int (*d_ioctl)(int fd, ioctl_req_t request, ...);
442 ssize_t (*d_read)(int fd, void *buffer, size_t count);
443 ssize_t (*d_write)(int fd, const void *buffer, size_t count);
446 * Locking and blocking calls
449 void _r_dlock(const char *, int, bool locked=false); /* in lock.c */
450 void _r_dunlock(const char *, int); /* in lock.c */
451 void _dlock(const char *, int); /* in lock.c */
452 void _dunlock(const char *, int); /* in lock.c */
454 void r_dlock(bool locked=false); /* in lock.c */
455 void r_dunlock() { dunlock(); }
456 void dlock() { P(m_mutex); }
457 void dunlock() { V(m_mutex); }
459 void dblock(int why); /* in lock.c */
460 void dunblock(bool locked=false); /* in lock.c */
461 bool is_device_unmounted(); /* in lock.c */
462 void set_blocked(int block) { m_blocked = block; };
463 int blocked() const { return m_blocked; };
464 bool is_blocked() const { return m_blocked != BST_NOT_BLOCKED; };
465 const char *print_blocked() const; /* in dev.c */
468 bool do_mount(int mount, int timeout); /* in dev.c */
469 void set_mode(int omode); /* in dev.c */
470 void open_tape_device(DCR *dcr, int omode); /* in dev.c */
471 void open_file_device(DCR *dcr, int omode); /* in dev.c */
472 void open_dvd_device(DCR *dcr, int omode); /* in dev.c */
475 inline const char *DEVICE::strerror() const { return errmsg; }
476 inline const char *DEVICE::archive_name() const { return dev_name; }
477 inline const char *DEVICE::print_name() const { return prt_name; }
480 * Device Context (or Control) Record.
481 * There is one of these records for each Job that is using
482 * the device. Items in this record are "local" to the Job and
483 * do not affect other Jobs. Note, a job can have multiple
484 * DCRs open, each pointing to a different device.
488 bool m_dev_locked; /* set if dev already locked */
489 bool m_reserved; /* set if reserved device */
490 bool m_found_in_use; /* set if a volume found in use */
493 dlink dev_link; /* link to attach to dev */
494 JCR *jcr; /* pointer to JCR */
495 DEVICE * volatile dev; /* pointer to device */
496 DEVRES *device; /* pointer to device resource */
497 DEV_BLOCK *block; /* pointer to block */
498 DEV_RECORD *rec; /* pointer to record */
499 pthread_t tid; /* Thread running this dcr */
500 int spool_fd; /* fd if spooling */
501 bool spool_data; /* set to spool data */
502 bool spooling; /* set when actually spooling */
503 bool despooling; /* set when despooling */
504 bool despool_wait; /* waiting for despooling */
505 bool NewVol; /* set if new Volume mounted */
506 bool WroteVol; /* set if Volume written */
507 bool NewFile; /* set when EOF written */
508 bool reserved_volume; /* set if we reserved a volume */
509 bool any_volume; /* Any OK for dir_find_next... */
510 bool attached_to_dev; /* set when attached to dev */
511 bool keep_dcr; /* do not free dcr in release_dcr */
512 uint32_t VolFirstIndex; /* First file index this Volume */
513 uint32_t VolLastIndex; /* Last file index this Volume */
514 uint32_t FileIndex; /* Current File Index */
515 uint32_t EndFile; /* End file written */
516 uint32_t StartFile; /* Start write file */
517 uint32_t StartBlock; /* Start write block */
518 uint32_t EndBlock; /* Ending block written */
519 int64_t VolMediaId; /* MediaId */
520 int64_t job_spool_size; /* Current job spool size */
521 int64_t max_job_spool_size; /* Max job spool size */
522 char VolumeName[MAX_NAME_LENGTH]; /* Volume name */
523 char pool_name[MAX_NAME_LENGTH]; /* pool name */
524 char pool_type[MAX_NAME_LENGTH]; /* pool type */
525 char media_type[MAX_NAME_LENGTH]; /* media type */
526 char dev_name[MAX_NAME_LENGTH]; /* dev name */
527 int Copy; /* identical copy number */
528 int Stripe; /* RAIT stripe */
529 VOLUME_CAT_INFO VolCatInfo; /* Catalog info for desired volume */
532 bool found_in_use() const { return m_found_in_use; };
533 void set_found_in_use() { m_found_in_use = true; };
534 void clear_found_in_use() { m_found_in_use = false; };
535 bool is_reserved() const { return m_reserved; };
536 bool is_dev_locked() { return m_dev_locked; }
538 void _dlock(const char *, int); /* in lock.c */
539 void _dunlock(const char *, int); /* in lock.c */
541 void dlock() { dev->dlock(); m_dev_locked = true; }
542 void dunlock() { m_dev_locked = false; dev->dunlock(); }
544 void dblock(int why) { dev->dblock(why); }
547 /* Methods in reserve.c */
548 void clear_reserved();
550 void unreserve_device();
552 /* Methods in vol_mgr.c */
553 bool can_i_use_volume();
554 bool can_i_write_volume();
556 /* Methods in mount.c */
557 bool mount_next_write_volume();
558 bool mount_next_read_volume();
559 void mark_volume_in_error();
560 void mark_volume_not_inchanger();
561 int try_autolabel(bool opened);
562 bool find_a_volume();
563 bool is_suitable_volume_mounted();
565 int check_volume_label(bool &ask, bool &autochanger);
566 void release_volume();
567 void do_swapping(bool is_writing);
569 bool do_load(bool is_writing);
570 bool is_tape_position_ok();
574 * Volume reservation class -- see reserve.c
577 bool m_swapping; /* set when swapping to another drive */
578 bool m_in_use; /* set when volume reserved or in use */
579 int32_t m_slot; /* slot of swapping volume */
580 uint32_t m_JobId; /* JobId for read volumes */
583 char *vol_name; /* Volume name */
584 DEVICE *dev; /* Pointer to device to which we are attached */
586 bool is_swapping() const { return m_swapping; };
587 void set_swapping() { m_swapping = true; };
588 void clear_swapping() { m_swapping = false; };
589 bool is_in_use() const { return m_in_use; };
590 void set_in_use() { m_in_use = true; };
591 void clear_in_use() { m_in_use = false; };
592 void set_slot(int32_t slot) { m_slot = slot; };
593 void clear_slot() { m_slot = -1; };
594 int32_t get_slot() const { return m_slot; };
595 uint32_t get_jobid() const { return m_JobId; };
596 void set_jobid(uint32_t JobId) { m_JobId = JobId; };
600 /* Get some definition of function to position
601 * to the end of the medium in MTEOM. System
602 * dependent. Arrgggg!