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 int m_num_reserved; /* counter of device reservations */
215 int32_t m_slot; /* slot loaded in drive or -1 if none */
216 pthread_t m_pid; /* Thread that locked -- DEBUG only */
217 bool m_unload; /* set when Volume must be unloaded */
218 bool m_load; /* set when Volume must be loaded */
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_mutex_t acquire_mutex; /* mutex for acquire code */
226 pthread_cond_t wait; /* thread wait variable */
227 pthread_cond_t wait_next_vol; /* wait for tape to be mounted */
228 pthread_t no_wait_id; /* this thread must not wait */
229 int dev_prev_blocked; /* previous blocked state */
230 int num_waiting; /* number of threads waiting */
231 int num_writers; /* number of writing threads */
232 int capabilities; /* capabilities mask */
233 int state; /* state mask */
234 int dev_errno; /* Our own errno */
235 int mode; /* read/write modes */
236 int openmode; /* parameter passed to open_dev (useful to reopen the device) */
237 int dev_type; /* device type */
238 bool autoselect; /* Autoselect in autochanger */
239 bool initiated; /* set when init_dev() called */
240 int label_type; /* Bacula/ANSI/IBM label types */
241 uint32_t drive_index; /* Autochanger drive index (base 0) */
242 POOLMEM *dev_name; /* Physical device name */
243 POOLMEM *prt_name; /* Name used for display purposes */
244 char *errmsg; /* nicely edited error message */
245 uint32_t block_num; /* current block number base 0 */
246 uint32_t LastBlock; /* last DEV_BLOCK number written to Volume */
247 uint32_t file; /* current file number base 0 */
248 uint64_t file_addr; /* Current file read/write address */
249 uint64_t file_size; /* Current file size */
250 uint32_t EndBlock; /* last block written */
251 uint32_t EndFile; /* last file written */
252 uint32_t min_block_size; /* min block size */
253 uint32_t max_block_size; /* max block size */
254 uint64_t max_volume_size; /* max bytes to put on one volume */
255 uint64_t max_file_size; /* max file size to put in one file on volume */
256 uint64_t max_concurrent_jobs; /* maximum simultaneous jobs this drive */
257 uint64_t volume_capacity; /* advisory capacity */
258 uint64_t max_spool_size; /* maximum spool file size */
259 uint64_t spool_size; /* current spool size for this device */
260 uint32_t max_rewind_wait; /* max secs to allow for rewind */
261 uint32_t max_open_wait; /* max secs to allow for open */
262 uint32_t max_open_vols; /* max simultaneous open volumes */
264 uint64_t max_part_size; /* max part size */
265 uint64_t part_size; /* current part size */
266 uint32_t part; /* current part number (starts at 0) */
267 uint64_t part_start; /* current part start address (relative to the whole volume) */
268 uint32_t num_dvd_parts; /* number of parts WRITTEN on the DVD */
269 /* state ST_FREESPACE_OK is set if free_space is valid */
270 uint64_t free_space; /* current free space on medium (without the current part) */
271 int free_space_errno; /* indicates errno getting freespace */
272 bool truncating; /* if set, we are currently truncating the DVD */
273 bool blank_dvd; /* if set, we have a blank DVD in the drive */
276 utime_t vol_poll_interval; /* interval between polling Vol mount */
277 DEVRES *device; /* pointer to Device Resource */
278 VOLRES *vol; /* Pointer to Volume reservation item */
279 btimer_t *tid; /* timer id */
281 VOLUME_CAT_INFO VolCatInfo; /* Volume Catalog Information */
282 VOLUME_LABEL VolHdr; /* Actual volume label */
283 char pool_name[MAX_NAME_LENGTH]; /* pool name */
284 char pool_type[MAX_NAME_LENGTH]; /* pool type */
286 char UnloadVolName[MAX_NAME_LENGTH]; /* Last wrong Volume mounted */
287 bool poll; /* set to poll Volume */
288 /* Device wait times ***FIXME*** look at durations */
296 btime_t last_timer; /* used by read/write/seek to get stats (usec) */
297 btime_t last_tick; /* contains last read/write time (usec) */
300 btime_t DevWriteTime;
301 uint64_t DevWriteBytes;
302 uint64_t DevReadBytes;
305 btime_t get_timer_count(); /* return the last timer interval (ms) */
307 int has_cap(int cap) const { return capabilities & cap; }
308 void clear_cap(int cap) { capabilities &= ~cap; }
309 void set_cap(int cap) { capabilities |= cap; }
310 int is_autochanger() const { return capabilities & CAP_AUTOCHANGER; }
311 int requires_mount() const { return capabilities & CAP_REQMOUNT; }
312 int is_removable() const { return capabilities & CAP_REM; }
313 int is_tape() const { return (dev_type == B_TAPE_DEV ||
314 dev_type == B_VTAPE_DEV); }
315 int is_file() const { return dev_type == B_FILE_DEV; }
316 int is_fifo() const { return dev_type == B_FIFO_DEV; }
317 int is_dvd() const { return dev_type == B_DVD_DEV; }
318 int is_vtl() const { return dev_type == B_VTL_DEV; }
319 int is_vtape() const { return dev_type == B_VTAPE_DEV; }
320 int is_open() const { return m_fd >= 0; }
321 int is_offline() const { return state & ST_OFFLINE; }
322 int is_labeled() const { return state & ST_LABEL; }
323 int is_mounted() const { return state & ST_MOUNTED; }
324 int is_unmountable() const { return (is_dvd() || (is_file() && is_removable())); }
325 int num_reserved() const { return m_num_reserved; };
326 int is_part_spooled() const { return state & ST_PART_SPOOLED; }
327 int have_media() const { return state & ST_MEDIA; }
328 int is_short_block() const { return state & ST_SHORT; }
329 int is_busy() const { return (state & ST_READ) || num_writers || num_reserved(); }
330 int at_eof() const { return state & ST_EOF; }
331 int at_eot() const { return state & ST_EOT; }
332 int at_weot() const { return state & ST_WEOT; }
333 int can_append() const { return state & ST_APPEND; }
334 int is_freespace_ok() const { return state & ST_FREESPACE_OK; }
336 * can_write() is meant for checking at the end of a job to see
337 * if we still have a tape (perhaps not if at end of tape
338 * and the job is canceled).
340 int can_write() const { return is_open() && can_append() &&
341 is_labeled() && !at_weot(); }
342 int can_read() const { return state & ST_READ; }
343 bool can_steal_lock() const { return m_blocked &&
344 (m_blocked == BST_UNMOUNTED ||
345 m_blocked == BST_WAITING_FOR_SYSOP ||
346 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
347 bool waiting_for_mount() const { return
348 (m_blocked == BST_UNMOUNTED ||
349 m_blocked == BST_WAITING_FOR_SYSOP ||
350 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
351 bool must_unload() const { return m_unload; };
352 bool must_load() const { return m_load; };
353 const char *strerror() const;
354 const char *archive_name() const;
355 const char *name() const;
356 const char *print_name() const; /* Name for display purposes */
357 void set_ateof(); /* in dev.c */
358 void set_ateot(); /* in dev.c */
359 void set_eot() { state |= ST_EOT; };
360 void set_eof() { state |= ST_EOF; };
361 void set_append() { state |= ST_APPEND; };
362 void set_labeled() { state |= ST_LABEL; };
363 inline void set_read() { state |= ST_READ; };
364 void set_offline() { state |= ST_OFFLINE; };
365 void set_mounted() { state |= ST_MOUNTED; };
366 void set_media() { state |= ST_MEDIA; };
367 void set_short_block() { state |= ST_SHORT; };
368 void set_freespace_ok() { state |= ST_FREESPACE_OK; }
369 void set_part_spooled(int val) { if (val) state |= ST_PART_SPOOLED; \
370 else state &= ~ST_PART_SPOOLED;
372 bool is_volume_to_unload() const { \
373 return m_unload && strcmp(VolHdr.VolumeName, UnloadVolName) == 0; };
374 void set_load() { m_load = true; };
375 void inc_reserved() { m_num_reserved++; }
376 void set_mounted(int val) { if (val) state |= ST_MOUNTED; \
377 else state &= ~ST_MOUNTED; };
378 void dec_reserved() { m_num_reserved--; ASSERT(m_num_reserved>=0); };
379 void clear_append() { state &= ~ST_APPEND; };
380 void clear_read() { state &= ~ST_READ; };
381 void clear_labeled() { state &= ~ST_LABEL; };
382 void clear_offline() { state &= ~ST_OFFLINE; };
383 void clear_eot() { state &= ~ST_EOT; };
384 void clear_eof() { state &= ~ST_EOF; };
385 void clear_opened() { m_fd = -1; };
386 void clear_mounted() { state &= ~ST_MOUNTED; };
387 void clear_media() { state &= ~ST_MEDIA; };
388 void clear_short_block() { state &= ~ST_SHORT; };
389 void clear_freespace_ok() { state &= ~ST_FREESPACE_OK; };
390 void clear_unload() { m_unload = false; UnloadVolName[0] = 0; };
391 void clear_load() { m_load = false; };
392 char *bstrerror(void) { return errmsg; };
393 char *print_errmsg() { return errmsg; };
394 int32_t get_slot() const { return m_slot; };
396 void set_unload(); /* in dev.c */
397 void clear_volhdr(); /* in dev.c */
398 void close(); /* in dev.c */
399 void close_part(DCR *dcr); /* in dev.c */
400 bool truncate(DCR *dcr); /* in dev.c */
401 int open(DCR *dcr, int mode); /* in dev.c */
402 void term(void); /* in dev.c */
403 ssize_t read(void *buf, size_t len); /* in dev.c */
404 ssize_t write(const void *buf, size_t len); /* in dev.c */
405 bool rewind(DCR *dcr); /* in dev.c */
406 bool mount(int timeout); /* in dev.c */
407 bool unmount(int timeout); /* in dev.c */
408 void edit_mount_codes(POOL_MEM &omsg, const char *imsg); /* in dev.c */
409 bool offline_or_rewind(); /* in dev.c */
410 bool offline(); /* in dev.c */
411 bool bsf(int count); /* in dev.c */
412 bool eod(DCR *dcr); /* in dev.c */
413 bool fsr(int num); /* in dev.c */
414 bool fsf(int num); /* in dev.c */
415 bool bsr(int num); /* in dev.c */
416 bool weof(int num); /* in dev.c */
417 void lock_door(); /* in dev.c */
418 void unlock_door(); /* in dev.c */
419 int32_t get_os_tape_file(); /* in dev.c */
420 bool scan_dir_for_volume(DCR *dcr); /* in scan.c */
421 bool reposition(DCR *dcr, uint32_t rfile, uint32_t rblock); /* in dev.c */
422 void clrerror(int func); /* in dev.c */
423 boffset_t lseek(DCR *dcr, boffset_t offset, int whence); /* in dev.c */
424 bool update_pos(DCR *dcr); /* in dev.c */
425 void set_slot(int32_t slot); /* in dev.c */
426 void clear_slot(); /* in dev.c */
429 bool update_freespace(); /* in dvd.c */
431 uint32_t get_file() const { return file; };
432 uint32_t get_block_num() const { return block_num; };
433 int fd() const { return m_fd; };
435 /* low level operations */
437 int (*d_open)(const char *pathname, int flags, ...);
438 int (*d_close)(int fd);
439 int (*d_ioctl)(int fd, ioctl_req_t request, ...);
440 ssize_t (*d_read)(int fd, void *buffer, size_t count);
441 ssize_t (*d_write)(int fd, const void *buffer, size_t count);
444 * Locking and blocking calls
447 void _r_dlock(const char *, int, bool locked=false); /* in lock.c */
448 void _r_dunlock(const char *, int); /* in lock.c */
449 void _dlock(const char *, int); /* in lock.c */
450 void _dunlock(const char *, int); /* in lock.c */
452 void r_dlock(bool locked=false); /* in lock.c */
453 void r_dunlock() { dunlock(); }
454 void dlock() { P(m_mutex); }
455 void dunlock() { V(m_mutex); }
457 void dblock(int why); /* in lock.c */
458 void dunblock(bool locked=false); /* in lock.c */
459 bool is_device_unmounted(); /* in lock.c */
460 void set_blocked(int block) { m_blocked = block; };
461 int blocked() const { return m_blocked; };
462 bool is_blocked() const { return m_blocked != BST_NOT_BLOCKED; };
463 const char *print_blocked() const; /* in dev.c */
466 bool do_mount(int mount, int timeout); /* in dev.c */
467 void set_mode(int omode); /* in dev.c */
468 void open_tape_device(DCR *dcr, int omode); /* in dev.c */
469 void open_file_device(DCR *dcr, int omode); /* in dev.c */
470 void open_dvd_device(DCR *dcr, int omode); /* in dev.c */
473 inline const char *DEVICE::strerror() const { return errmsg; }
474 inline const char *DEVICE::archive_name() const { return dev_name; }
475 inline const char *DEVICE::print_name() const { return prt_name; }
478 * Device Context (or Control) Record.
479 * There is one of these records for each Job that is using
480 * the device. Items in this record are "local" to the Job and
481 * do not affect other Jobs. Note, a job can have multiple
482 * DCRs open, each pointing to a different device.
486 bool m_dev_locked; /* set if dev already locked */
487 bool m_reserved; /* set if reserved device */
488 bool m_found_in_use; /* set if a volume found in use */
491 dlink dev_link; /* link to attach to dev */
492 JCR *jcr; /* pointer to JCR */
493 DEVICE * volatile dev; /* pointer to device */
494 DEVRES *device; /* pointer to device resource */
495 DEV_BLOCK *block; /* pointer to block */
496 DEV_RECORD *rec; /* pointer to record */
497 pthread_t tid; /* Thread running this dcr */
498 int spool_fd; /* fd if spooling */
499 bool spool_data; /* set to spool data */
500 bool spooling; /* set when actually spooling */
501 bool despooling; /* set when despooling */
502 bool despool_wait; /* waiting for despooling */
503 bool NewVol; /* set if new Volume mounted */
504 bool WroteVol; /* set if Volume written */
505 bool NewFile; /* set when EOF written */
506 bool reserved_volume; /* set if we reserved a volume */
507 bool any_volume; /* Any OK for dir_find_next... */
508 bool attached_to_dev; /* set when attached to dev */
509 bool keep_dcr; /* do not free dcr in release_dcr */
510 uint32_t VolFirstIndex; /* First file index this Volume */
511 uint32_t VolLastIndex; /* Last file index this Volume */
512 uint32_t FileIndex; /* Current File Index */
513 uint32_t EndFile; /* End file written */
514 uint32_t StartFile; /* Start write file */
515 uint32_t StartBlock; /* Start write block */
516 uint32_t EndBlock; /* Ending block written */
517 int64_t VolMediaId; /* MediaId */
518 int64_t job_spool_size; /* Current job spool size */
519 int64_t max_job_spool_size; /* Max job spool size */
520 char VolumeName[MAX_NAME_LENGTH]; /* Volume name */
521 char pool_name[MAX_NAME_LENGTH]; /* pool name */
522 char pool_type[MAX_NAME_LENGTH]; /* pool type */
523 char media_type[MAX_NAME_LENGTH]; /* media type */
524 char dev_name[MAX_NAME_LENGTH]; /* dev name */
525 int Copy; /* identical copy number */
526 int Stripe; /* RAIT stripe */
527 VOLUME_CAT_INFO VolCatInfo; /* Catalog info for desired volume */
530 bool found_in_use() const { return m_found_in_use; };
531 void set_found_in_use() { m_found_in_use = true; };
532 void clear_found_in_use() { m_found_in_use = false; };
533 bool is_reserved() const { return m_reserved; };
534 bool is_dev_locked() { return m_dev_locked; }
536 void _dlock(const char *, int); /* in lock.c */
537 void _dunlock(const char *, int); /* in lock.c */
539 void dlock() { dev->dlock(); m_dev_locked = true; }
540 void dunlock() { m_dev_locked = false; dev->dunlock(); }
542 void dblock(int why) { dev->dblock(why); }
545 /* Methods in reserve.c */
546 void clear_reserved();
548 void unreserve_device();
550 /* Methods in vol_mgr.c */
551 bool can_i_use_volume();
552 bool can_i_write_volume();
554 /* Methods in mount.c */
555 bool mount_next_write_volume();
556 bool mount_next_read_volume();
557 void mark_volume_in_error();
558 void mark_volume_not_inchanger();
559 int try_autolabel(bool opened);
560 bool find_a_volume();
561 bool is_suitable_volume_mounted();
563 int check_volume_label(bool &ask, bool &autochanger);
564 void release_volume();
565 void do_swapping(bool is_writing);
567 bool do_load(bool is_writing);
568 bool is_tape_position_ok();
572 * Volume reservation class -- see reserve.c
575 bool m_swapping; /* set when swapping to another drive */
576 bool m_in_use; /* set when volume reserved or in use */
577 int32_t m_slot; /* slot of swapping volume */
578 uint32_t m_JobId; /* JobId for read volumes */
581 char *vol_name; /* Volume name */
582 DEVICE *dev; /* Pointer to device to which we are attached */
584 bool is_swapping() const { return m_swapping; };
585 void set_swapping() { m_swapping = true; };
586 void clear_swapping() { m_swapping = false; };
587 bool is_in_use() const { return m_in_use; };
588 void set_in_use() { m_in_use = true; };
589 void clear_in_use() { m_in_use = false; };
590 void set_slot(int32_t slot) { m_slot = slot; };
591 void clear_slot() { m_slot = -1; };
592 int32_t get_slot() const { return m_slot; };
593 uint32_t get_jobid() const { return m_JobId; };
594 void set_jobid(uint32_t JobId) { m_JobId = JobId; };
598 /* Get some definition of function to position
599 * to the end of the medium in MTEOM. System
600 * dependent. Arrgggg!