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 */
141 #define dev_state(dev, st_state) ((dev)->state & (st_state))
143 /* Device state bits */
144 #define ST_XXXXXX (1<<0) /* was ST_OPENED */
145 #define ST_XXXXX (1<<1) /* was ST_TAPE */
146 #define ST_XXXX (1<<2) /* was ST_FILE */
147 #define ST_XXX (1<<3) /* was ST_FIFO */
148 #define ST_XX (1<<4) /* was ST_DVD */
149 #define ST_X (1<<5) /* was ST_PROG */
151 #define ST_LABEL (1<<6) /* label found */
152 #define ST_MALLOC (1<<7) /* dev packet malloc'ed in init_dev() */
153 #define ST_APPEND (1<<8) /* ready for Bacula append */
154 #define ST_READ (1<<9) /* ready for Bacula read */
155 #define ST_EOT (1<<10) /* at end of tape */
156 #define ST_WEOT (1<<11) /* Got EOT on write */
157 #define ST_EOF (1<<12) /* Read EOF i.e. zero bytes */
158 #define ST_NEXTVOL (1<<13) /* Start writing on next volume */
159 #define ST_SHORT (1<<14) /* Short block read */
160 #define ST_MOUNTED (1<<15) /* the device is mounted to the mount point */
161 #define ST_MEDIA (1<<16) /* Media found in mounted device */
162 #define ST_OFFLINE (1<<17) /* set offline by operator */
163 #define ST_PART_SPOOLED (1<<18) /* spooling part */
164 #define ST_FREESPACE_OK (1<<19) /* Have valid freespace for DVD */
167 /* Volume Catalog Information structure definition */
168 struct VOLUME_CAT_INFO {
169 /* Media info for the current Volume */
170 uint32_t VolCatJobs; /* number of jobs on this Volume */
171 uint32_t VolCatFiles; /* Number of files */
172 uint32_t VolCatBlocks; /* Number of blocks */
173 uint64_t VolCatBytes; /* Number of bytes written */
174 uint32_t VolCatParts; /* Number of parts written */
175 uint32_t VolCatMounts; /* Number of mounts this volume */
176 uint32_t VolCatErrors; /* Number of errors this volume */
177 uint32_t VolCatWrites; /* Number of writes this volume */
178 uint32_t VolCatReads; /* Number of reads this volume */
179 uint64_t VolCatRBytes; /* Number of bytes read */
180 uint32_t VolCatRecycles; /* Number of recycles this volume */
181 uint32_t EndFile; /* Last file number */
182 uint32_t EndBlock; /* Last block number */
183 int32_t LabelType; /* Bacula/ANSI/IBM */
184 int32_t Slot; /* >0=Slot loaded, 0=nothing, -1=unknown */
185 uint32_t VolCatMaxJobs; /* Maximum Jobs to write to volume */
186 uint32_t VolCatMaxFiles; /* Maximum files to write to volume */
187 uint64_t VolCatMaxBytes; /* Max bytes to write to volume */
188 uint64_t VolCatCapacityBytes; /* capacity estimate */
189 btime_t VolReadTime; /* time spent reading */
190 btime_t VolWriteTime; /* time spent writing this Volume */
191 int64_t VolMediaId; /* MediaId */
192 utime_t VolFirstWritten; /* Time of first write */
193 utime_t VolLastWritten; /* Time of last write */
194 bool InChanger; /* Set if vol in current magazine */
195 char VolCatStatus[20]; /* Volume status */
196 char VolCatName[MAX_NAME_LENGTH]; /* Desired volume to mount */
200 class DEVRES; /* Device resource defined in stored_conf.h */
201 class DCR; /* forward reference */
202 class VOLRES; /* forward reference */
205 * Device structure definition. There is one of these for
206 * each physical device. Everything here is "global" to
207 * that device and effects all jobs using the device.
211 int m_fd; /* file descriptor */
212 int m_blocked; /* set if we must wait (i.e. change tape) */
213 int m_count; /* Mutex use count -- DEBUG only */
214 pthread_t m_pid; /* Thread that locked -- DEBUG only */
215 bool m_unload; /* set when Volume must be unloaded */
216 bool m_load; /* set when Volume must be loaded */
217 int m_num_reserved; /* counter of device reservations */
218 int32_t m_slot; /* slot loaded in drive or -1 if none */
221 DEVICE * volatile swap_dev; /* Swap vol from this device */
222 dlist *attached_dcrs; /* attached DCR list */
223 pthread_mutex_t m_mutex; /* access control */
224 pthread_mutex_t spool_mutex; /* mutex for updating spool_size */
225 pthread_cond_t wait; /* thread wait variable */
226 pthread_cond_t wait_next_vol; /* wait for tape to be mounted */
227 pthread_t no_wait_id; /* this thread must not wait */
228 int dev_prev_blocked; /* previous blocked state */
229 int num_waiting; /* number of threads waiting */
230 int num_writers; /* number of writing threads */
231 int capabilities; /* capabilities mask */
232 int state; /* state mask */
233 int dev_errno; /* Our own errno */
234 int mode; /* read/write modes */
235 int openmode; /* parameter passed to open_dev (useful to reopen the device) */
236 int dev_type; /* device type */
237 bool autoselect; /* Autoselect in autochanger */
238 bool initiated; /* set when init_dev() called */
239 int label_type; /* Bacula/ANSI/IBM label types */
240 uint32_t drive_index; /* Autochanger drive index (base 0) */
241 POOLMEM *dev_name; /* Physical device name */
242 POOLMEM *prt_name; /* Name used for display purposes */
243 char *errmsg; /* nicely edited error message */
244 uint32_t block_num; /* current block number base 0 */
245 uint32_t LastBlock; /* last DEV_BLOCK number written to Volume */
246 uint32_t file; /* current file number base 0 */
247 uint64_t file_addr; /* Current file read/write address */
248 uint64_t file_size; /* Current file size */
249 uint32_t EndBlock; /* last block written */
250 uint32_t EndFile; /* last file written */
251 uint32_t min_block_size; /* min block size */
252 uint32_t max_block_size; /* max block size */
253 uint64_t max_volume_size; /* max bytes to put on one volume */
254 uint64_t max_file_size; /* max file size to put in one file on volume */
255 uint64_t max_concurrent_jobs; /* maximum simultaneous jobs this drive */
256 uint64_t volume_capacity; /* advisory capacity */
257 uint64_t max_spool_size; /* maximum spool file size */
258 uint64_t spool_size; /* current spool size for this device */
259 uint32_t max_rewind_wait; /* max secs to allow for rewind */
260 uint32_t max_open_wait; /* max secs to allow for open */
261 uint32_t max_open_vols; /* max simultaneous open volumes */
263 uint64_t max_part_size; /* max part size */
264 uint64_t part_size; /* current part size */
265 uint32_t part; /* current part number (starts at 0) */
266 uint64_t part_start; /* current part start address (relative to the whole volume) */
267 uint32_t num_dvd_parts; /* number of parts WRITTEN on the DVD */
268 /* state ST_FREESPACE_OK is set if free_space is valid */
269 uint64_t free_space; /* current free space on medium (without the current part) */
270 int free_space_errno; /* indicates errno getting freespace */
271 bool truncating; /* if set, we are currently truncating the DVD */
272 bool blank_dvd; /* if set, we have a blank DVD in the drive */
275 utime_t vol_poll_interval; /* interval between polling Vol mount */
276 DEVRES *device; /* pointer to Device Resource */
277 VOLRES *vol; /* Pointer to Volume reservation item */
278 btimer_t *tid; /* timer id */
280 VOLUME_CAT_INFO VolCatInfo; /* Volume Catalog Information */
281 VOLUME_LABEL VolHdr; /* Actual volume label */
282 char pool_name[MAX_NAME_LENGTH]; /* pool name */
283 char pool_type[MAX_NAME_LENGTH]; /* pool type */
285 char UnloadVolName[MAX_NAME_LENGTH]; /* Last wrong Volume mounted */
286 bool poll; /* set to poll Volume */
287 /* Device wait times ***FIXME*** look at durations */
295 btime_t last_timer; /* used by read/write/seek to get stats (usec) */
296 btime_t last_tick; /* contains last read/write time (usec) */
299 btime_t DevWriteTime;
300 uint64_t DevWriteBytes;
301 uint64_t DevReadBytes;
304 btime_t get_timer_count(); /* return the last timer interval (ms) */
306 int has_cap(int cap) const { return capabilities & cap; }
307 void clear_cap(int cap) { capabilities &= ~cap; }
308 void set_cap(int cap) { capabilities |= cap; }
309 int is_autochanger() const { return capabilities & CAP_AUTOCHANGER; }
310 int requires_mount() const { return capabilities & CAP_REQMOUNT; }
311 int is_removable() const { return capabilities & CAP_REM; }
312 int is_tape() const { return (dev_type == B_TAPE_DEV ||
313 dev_type == B_VTAPE_DEV); }
314 int is_file() const { return dev_type == B_FILE_DEV; }
315 int is_fifo() const { return dev_type == B_FIFO_DEV; }
316 int is_dvd() const { return dev_type == B_DVD_DEV; }
317 int is_vtl() const { return dev_type == B_VTL_DEV; }
318 int is_vtape() const { return dev_type == B_VTAPE_DEV; }
319 int is_open() const { return m_fd >= 0; }
320 int is_offline() const { return state & ST_OFFLINE; }
321 int is_labeled() const { return state & ST_LABEL; }
322 int is_mounted() const { return state & ST_MOUNTED; }
323 int is_unmountable() const { return (is_dvd() || (is_file() && is_removable())); }
324 int num_reserved() const { return m_num_reserved; };
325 int is_part_spooled() const { return state & ST_PART_SPOOLED; }
326 int have_media() const { return state & ST_MEDIA; }
327 int is_short_block() const { return state & ST_SHORT; }
328 int is_busy() const { return (state & ST_READ) || num_writers || num_reserved(); }
329 int at_eof() const { return state & ST_EOF; }
330 int at_eot() const { return state & ST_EOT; }
331 int at_weot() const { return state & ST_WEOT; }
332 int can_append() const { return state & ST_APPEND; }
333 int is_freespace_ok() const { return state & ST_FREESPACE_OK; }
335 * can_write() is meant for checking at the end of a job to see
336 * if we still have a tape (perhaps not if at end of tape
337 * and the job is canceled).
339 int can_write() const { return is_open() && can_append() &&
340 is_labeled() && !at_weot(); }
341 int can_read() const { return state & ST_READ; }
342 bool can_steal_lock() const { return m_blocked &&
343 (m_blocked == BST_UNMOUNTED ||
344 m_blocked == BST_WAITING_FOR_SYSOP ||
345 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
346 bool waiting_for_mount() const { return
347 (m_blocked == BST_UNMOUNTED ||
348 m_blocked == BST_WAITING_FOR_SYSOP ||
349 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
350 bool must_unload() const { return m_unload; };
351 bool must_load() const { return m_load; };
352 const char *strerror() const;
353 const char *archive_name() const;
354 const char *name() const;
355 const char *print_name() const; /* Name for display purposes */
356 void set_ateof(); /* in dev.c */
357 void set_ateot(); /* in dev.c */
358 void set_eot() { state |= ST_EOT; };
359 void set_eof() { state |= ST_EOF; };
360 void set_append() { state |= ST_APPEND; };
361 void set_labeled() { state |= ST_LABEL; };
362 inline void set_read() { state |= ST_READ; };
363 void set_offline() { state |= ST_OFFLINE; };
364 void set_mounted() { state |= ST_MOUNTED; };
365 void set_media() { state |= ST_MEDIA; };
366 void set_short_block() { state |= ST_SHORT; };
367 void set_freespace_ok() { state |= ST_FREESPACE_OK; }
368 void set_part_spooled(int val) { if (val) state |= ST_PART_SPOOLED; \
369 else state &= ~ST_PART_SPOOLED;
371 bool is_volume_to_unload() const { \
372 return m_unload && strcmp(VolHdr.VolumeName, UnloadVolName) == 0; };
373 void set_load() { m_load = true; };
374 void inc_reserved() { m_num_reserved++; }
375 void set_mounted(int val) { if (val) state |= ST_MOUNTED; \
376 else state &= ~ST_MOUNTED; };
377 void dec_reserved() { m_num_reserved--; ASSERT(m_num_reserved>=0); };
378 void clear_append() { state &= ~ST_APPEND; };
379 void clear_read() { state &= ~ST_READ; };
380 void clear_labeled() { state &= ~ST_LABEL; };
381 void clear_offline() { state &= ~ST_OFFLINE; };
382 void clear_eot() { state &= ~ST_EOT; };
383 void clear_eof() { state &= ~ST_EOF; };
384 void clear_opened() { m_fd = -1; };
385 void clear_mounted() { state &= ~ST_MOUNTED; };
386 void clear_media() { state &= ~ST_MEDIA; };
387 void clear_short_block() { state &= ~ST_SHORT; };
388 void clear_freespace_ok() { state &= ~ST_FREESPACE_OK; };
389 void clear_unload() { m_unload = false; UnloadVolName[0] = 0; };
390 void clear_load() { m_load = false; };
391 char *bstrerror(void) { return errmsg; };
392 char *print_errmsg() { return errmsg; };
393 int32_t get_slot() const { return m_slot; };
395 void set_unload(); /* in dev.c */
396 void clear_volhdr(); /* in dev.c */
397 void close(); /* in dev.c */
398 void close_part(DCR *dcr); /* in dev.c */
399 bool truncate(DCR *dcr); /* in dev.c */
400 int open(DCR *dcr, int mode); /* in dev.c */
401 void term(void); /* in dev.c */
402 ssize_t read(void *buf, size_t len); /* in dev.c */
403 ssize_t write(const void *buf, size_t len); /* in dev.c */
404 bool rewind(DCR *dcr); /* in dev.c */
405 bool mount(int timeout); /* in dev.c */
406 bool unmount(int timeout); /* in dev.c */
407 void edit_mount_codes(POOL_MEM &omsg, const char *imsg); /* in dev.c */
408 bool offline_or_rewind(); /* in dev.c */
409 bool offline(); /* in dev.c */
410 bool bsf(int count); /* in dev.c */
411 bool eod(DCR *dcr); /* in dev.c */
412 bool fsr(int num); /* in dev.c */
413 bool fsf(int num); /* in dev.c */
414 bool bsr(int num); /* in dev.c */
415 bool weof(int num); /* in dev.c */
416 void lock_door(); /* in dev.c */
417 void unlock_door(); /* in dev.c */
418 int32_t get_os_tape_file(); /* in dev.c */
419 bool scan_dir_for_volume(DCR *dcr); /* in scan.c */
420 bool reposition(DCR *dcr, uint32_t rfile, uint32_t rblock); /* in dev.c */
421 void clrerror(int func); /* in dev.c */
422 boffset_t lseek(DCR *dcr, boffset_t offset, int whence); /* in dev.c */
423 bool update_pos(DCR *dcr); /* in dev.c */
424 void set_slot(int32_t slot); /* in dev.c */
425 void clear_slot(); /* in dev.c */
428 bool update_freespace(); /* in dvd.c */
430 uint32_t get_file() const { return file; };
431 uint32_t get_block_num() const { return block_num; };
432 int fd() const { return m_fd; };
434 /* low level operations */
436 int (*d_open)(const char *pathname, int flags, ...);
437 int (*d_close)(int fd);
438 int (*d_ioctl)(int fd, ioctl_req_t request, ...);
439 ssize_t (*d_read)(int fd, void *buffer, size_t count);
440 ssize_t (*d_write)(int fd, const void *buffer, size_t count);
443 * Locking and blocking calls
446 void _r_dlock(const char *, int); /* in lock.c */
447 void _r_dunlock(const char *, int); /* in lock.c */
448 void _dlock(const char *, int); /* in lock.c */
449 void _dunlock(const char *, int); /* in lock.c */
451 void r_dlock(); /* in lock.c */
452 void r_dunlock() { dunlock(); }
453 void dlock() { P(m_mutex); }
454 void dunlock() { V(m_mutex); }
456 void dblock(int why); /* in lock.c */
457 void dunblock(bool locked=false); /* in lock.c */
458 void set_blocked(int block) { m_blocked = block; };
459 int blocked() const { return m_blocked; };
460 bool is_blocked() const { return m_blocked != BST_NOT_BLOCKED; };
461 const char *print_blocked() const; /* in dev.c */
464 bool do_mount(int mount, int timeout); /* in dev.c */
465 void set_mode(int omode); /* in dev.c */
466 void open_tape_device(DCR *dcr, int omode); /* in dev.c */
467 void open_file_device(DCR *dcr, int omode); /* in dev.c */
468 void open_dvd_device(DCR *dcr, int omode); /* in dev.c */
471 inline const char *DEVICE::strerror() const { return errmsg; }
472 inline const char *DEVICE::archive_name() const { return dev_name; }
473 inline const char *DEVICE::print_name() const { return prt_name; }
476 * Device Context (or Control) Record.
477 * There is one of these records for each Job that is using
478 * the device. Items in this record are "local" to the Job and
479 * do not affect other Jobs. Note, a job can have multiple
480 * DCRs open, each pointing to a different device.
484 bool m_dev_locked; /* set if dev already locked */
485 bool m_reserved; /* set if reserved device */
486 bool m_found_in_use; /* set if a volume found in use */
489 dlink dev_link; /* link to attach to dev */
490 JCR *jcr; /* pointer to JCR */
491 DEVICE * volatile dev; /* pointer to device */
492 DEVRES *device; /* pointer to device resource */
493 DEV_BLOCK *block; /* pointer to block */
494 DEV_RECORD *rec; /* pointer to record */
495 pthread_t tid; /* Thread running this dcr */
496 int spool_fd; /* fd if spooling */
497 bool spool_data; /* set to spool data */
498 bool spooling; /* set when actually spooling */
499 bool despooling; /* set when despooling */
500 bool despool_wait; /* waiting for despooling */
501 bool NewVol; /* set if new Volume mounted */
502 bool WroteVol; /* set if Volume written */
503 bool NewFile; /* set when EOF written */
504 bool reserved_volume; /* set if we reserved a volume */
505 bool any_volume; /* Any OK for dir_find_next... */
506 bool attached_to_dev; /* set when attached to dev */
507 bool keep_dcr; /* do not free dcr in release_dcr */
508 uint32_t VolFirstIndex; /* First file index this Volume */
509 uint32_t VolLastIndex; /* Last file index this Volume */
510 uint32_t FileIndex; /* Current File Index */
511 uint32_t EndFile; /* End file written */
512 uint32_t StartFile; /* Start write file */
513 uint32_t StartBlock; /* Start write block */
514 uint32_t EndBlock; /* Ending block written */
515 int64_t VolMediaId; /* MediaId */
516 int64_t job_spool_size; /* Current job spool size */
517 int64_t max_job_spool_size; /* Max job spool size */
518 char VolumeName[MAX_NAME_LENGTH]; /* Volume name */
519 char pool_name[MAX_NAME_LENGTH]; /* pool name */
520 char pool_type[MAX_NAME_LENGTH]; /* pool type */
521 char media_type[MAX_NAME_LENGTH]; /* media type */
522 char dev_name[MAX_NAME_LENGTH]; /* dev name */
523 int Copy; /* identical copy number */
524 int Stripe; /* RAIT stripe */
525 VOLUME_CAT_INFO VolCatInfo; /* Catalog info for desired volume */
528 bool found_in_use() const { return m_found_in_use; };
529 void set_found_in_use() { m_found_in_use = true; };
530 void clear_found_in_use() { m_found_in_use = false; };
531 bool is_reserved() const { return m_reserved; };
532 bool is_dev_locked() { return m_dev_locked; }
533 void dlock() { dev->dlock(); m_dev_locked = true; }
534 void dunlock() { m_dev_locked = false; dev->dunlock(); }
535 void dblock(int why) { dev->dblock(why); }
538 /* Methods in reserve.c */
539 void clear_reserved();
541 void unreserve_device();
543 /* Methods in vol_mgr.c */
544 bool can_i_use_volume();
545 bool can_i_write_volume();
547 /* Methods in mount.c */
548 bool mount_next_write_volume();
549 bool mount_next_read_volume();
550 void mark_volume_in_error();
551 void mark_volume_not_inchanger();
552 int try_autolabel(bool opened);
553 bool find_a_volume();
554 bool is_suitable_volume_mounted();
556 int check_volume_label(bool &ask, bool &autochanger);
557 void release_volume();
558 void do_swapping(bool is_writing);
560 bool do_load(bool is_writing);
561 bool is_tape_position_ok();
565 * Volume reservation class -- see reserve.c
568 bool m_swapping; /* set when swapping to another drive */
569 bool m_in_use; /* set when volume reserved or in use */
570 int32_t m_slot; /* slot of swapping volume */
571 uint32_t m_JobId; /* JobId for read volumes */
574 char *vol_name; /* Volume name */
575 DEVICE *dev; /* Pointer to device to which we are attached */
577 bool is_swapping() const { return m_swapping; };
578 void set_swapping() { m_swapping = true; };
579 void clear_swapping() { m_swapping = false; };
580 bool is_in_use() const { return m_in_use; };
581 void set_in_use() { m_in_use = true; };
582 void clear_in_use() { m_in_use = false; };
583 void set_slot(int32_t slot) { m_slot = slot; };
584 void clear_slot() { m_slot = -1; };
585 int32_t get_slot() const { return m_slot; };
586 uint32_t get_jobid() const { return m_JobId; };
587 void set_jobid(uint32_t JobId) { m_JobId = JobId; };
591 /* Get some definition of function to position
592 * to the end of the medium in MTEOM. System
593 * dependent. Arrgggg!