2 Bacula® - The Network Backup Solution
4 Copyright (C) 2000-2014 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from many
7 others, a complete list can be found in the file AUTHORS.
9 You may use this file and others of this release according to the
10 license defined in the LICENSE file, which includes the Affero General
11 Public License, v3.0 ("AGPLv3") and some additional permissions and
12 terms pursuant to its AGPLv3 Section 7.
14 Bacula® is a registered trademark of Kern Sibbald.
17 * Definitions for using the Device functions in Bacula
18 * Tape and File storage access
25 * Some details of how device reservations work
28 * set_load() set to load volume
29 * needs_load() volume must be loaded (i.e. set_load done)
30 * clear_load() load done.
31 * set_unload() set to unload volume
32 * needs_unload() volume must be unloaded
33 * clear_unload() volume unloaded
35 * reservations are temporary until the drive is acquired
36 * inc_reserved() increments num of reservations
37 * dec_reserved() decrements num of reservations
38 * num_reserved() number of reservations
41 * set_reserved() sets local reserve flag and calls dev->inc_reserved()
42 * clear_reserved() clears local reserve flag and calls dev->dec_reserved()
43 * is_reserved() returns local reserved flag
44 * unreserve_device() much more complete unreservation
51 #undef DCR /* used by Bacula */
53 /* Return values from wait_for_sysop() */
62 /* Arguments to open_dev() */
64 CREATE_READ_WRITE = 1,
72 * If you update this table, be sure to add an
73 * entry in prt_dev_types[] in dev.c
80 B_VTAPE_DEV, /* change to B_TAPE_DEV after init */
83 B_VIRTUAL_DEV /* Virtual device */
86 /* Generic status bits returned from status_dev() */
87 #define BMT_TAPE (1<<0) /* is tape device */
88 #define BMT_EOF (1<<1) /* just read EOF */
89 #define BMT_BOT (1<<2) /* at beginning of tape */
90 #define BMT_EOT (1<<3) /* end of tape reached */
91 #define BMT_SM (1<<4) /* DDS setmark */
92 #define BMT_EOD (1<<5) /* DDS at end of data */
93 #define BMT_WR_PROT (1<<6) /* tape write protected */
94 #define BMT_ONLINE (1<<7) /* tape online */
95 #define BMT_DR_OPEN (1<<8) /* tape door open */
96 #define BMT_IM_REP_EN (1<<9) /* immediate report enabled */
99 /* Bits for device capabilities */
100 #define CAP_EOF (1<<0) /* has MTWEOF */
101 #define CAP_BSR (1<<1) /* has MTBSR */
102 #define CAP_BSF (1<<2) /* has MTBSF */
103 #define CAP_FSR (1<<3) /* has MTFSR */
104 #define CAP_FSF (1<<4) /* has MTFSF */
105 #define CAP_EOM (1<<5) /* has MTEOM */
106 #define CAP_REM (1<<6) /* is removable media */
107 #define CAP_RACCESS (1<<7) /* is random access device */
108 #define CAP_AUTOMOUNT (1<<8) /* Read device at start to see what is there */
109 #define CAP_LABEL (1<<9) /* Label blank tapes */
110 #define CAP_ANONVOLS (1<<10) /* Mount without knowing volume name */
111 #define CAP_ALWAYSOPEN (1<<11) /* always keep device open */
112 #define CAP_AUTOCHANGER (1<<12) /* AutoChanger */
113 #define CAP_OFFLINEUNMOUNT (1<<13) /* Offline before unmount */
114 #define CAP_STREAM (1<<14) /* Stream device */
115 #define CAP_BSFATEOM (1<<15) /* Backspace file at EOM */
116 #define CAP_FASTFSF (1<<16) /* Fast forward space file */
117 #define CAP_TWOEOF (1<<17) /* Write two eofs for EOM */
118 #define CAP_CLOSEONPOLL (1<<18) /* Close device on polling */
119 #define CAP_POSITIONBLOCKS (1<<19) /* Use block positioning */
120 #define CAP_MTIOCGET (1<<20) /* Basic support for fileno and blkno */
121 #define CAP_REQMOUNT (1<<21) /* Require mount/unmount */
122 #define CAP_CHECKLABELS (1<<22) /* Check for ANSI/IBM labels */
123 #define CAP_BLOCKCHECKSUM (1<<23) /* Create/test block checksum */
126 #define dev_state(dev, st_state) ((dev)->state & (st_state))
128 /* Device state bits */
129 #define ST_XXXXXX (1<<0) /* was ST_OPENED */
130 #define ST_XXXXX (1<<1) /* was ST_TAPE */
131 #define ST_XXXX (1<<2) /* was ST_FILE */
132 #define ST_XXX (1<<3) /* was ST_FIFO */
133 #define ST_XX (1<<4) /* was ST_DVD */
134 #define ST_X (1<<5) /* was ST_PROG */
136 #define ST_LABEL (1<<6) /* label found */
137 #define ST_MALLOC (1<<7) /* dev packet malloc'ed in init_dev() */
138 #define ST_APPEND (1<<8) /* ready for Bacula append */
139 #define ST_READ (1<<9) /* ready for Bacula read */
140 #define ST_EOT (1<<10) /* at end of tape */
141 #define ST_WEOT (1<<11) /* Got EOT on write */
142 #define ST_EOF (1<<12) /* Read EOF i.e. zero bytes */
143 #define ST_NEXTVOL (1<<13) /* Start writing on next volume */
144 #define ST_SHORT (1<<14) /* Short block read */
145 #define ST_MOUNTED (1<<15) /* the device is mounted to the mount point */
146 #define ST_MEDIA (1<<16) /* Media found in mounted device */
147 #define ST_OFFLINE (1<<17) /* set offline by operator */
148 #define ST_PART_SPOOLED (1<<18) /* spooling part */
149 #define ST_FREESPACE_OK (1<<19) /* Have valid freespace */
150 #define ST_NOSPACE (1<<20) /* No space on device */
153 /* Volume Catalog Information structure definition */
154 struct VOLUME_CAT_INFO {
155 /* Media info for the current Volume */
156 uint64_t VolCatBytes; /* Total bytes written */
157 uint64_t VolCatAmetaBytes; /* Ameta bytes written */
158 uint64_t VolCatPadding; /* Total padding bytes written */
159 uint32_t VolCatBlocks; /* Total blocks */
160 uint32_t VolCatAmetaBlocks; /* Ameta blocks */
161 uint32_t VolCatWrites; /* Total writes this volume */
162 uint32_t VolCatAmetaWrites; /* Ameta writes this volume */
163 uint32_t VolCatReads; /* Total reads this volume */
164 uint32_t VolCatAmetaReads; /* Ameta reads this volume */
165 uint64_t VolCatRBytes; /* Total bytes read */
166 uint64_t VolCatAmetaRBytes; /* Ameta bytes read */
168 uint32_t VolCatJobs; /* Number of jobs on this Volume */
169 uint32_t VolCatFiles; /* Number of files */
170 uint32_t VolCatParts; /* Number of parts written */
171 uint32_t VolCatMounts; /* Number of mounts this volume */
172 uint32_t VolCatErrors; /* Number of errors this volume */
173 uint32_t VolCatRecycles; /* Number of recycles this volume */
174 uint32_t EndFile; /* Last file number */
175 uint32_t EndBlock; /* Last block number */
176 int32_t LabelType; /* Bacula/ANSI/IBM */
177 int32_t Slot; /* >0=Slot loaded, 0=nothing, -1=unknown */
178 uint32_t VolCatMaxJobs; /* Maximum Jobs to write to volume */
179 uint32_t VolCatMaxFiles; /* Maximum files to write to volume */
180 uint64_t VolCatMaxBytes; /* Max bytes to write to volume */
181 uint64_t VolCatCapacityBytes; /* capacity estimate */
182 btime_t VolReadTime; /* time spent reading */
183 btime_t VolWriteTime; /* time spent writing this Volume */
184 int64_t VolMediaId; /* MediaId */
185 int64_t VolScratchPoolId; /* ScratchPoolId */
186 utime_t VolFirstWritten; /* Time of first write */
187 utime_t VolLastWritten; /* Time of last write */
188 bool InChanger; /* Set if vol in current magazine */
189 bool is_valid; /* set if this data is valid */
190 char VolCatStatus[20]; /* Volume status */
191 char VolCatName[MAX_NAME_LENGTH]; /* Desired volume to mount */
194 class DEVRES; /* Device resource defined in stored_conf.h */
195 class DCR; /* forward reference */
196 class VOLRES; /* forward reference */
199 * Device structure definition. There is one of these for
200 * each physical device. Everything here is "global" to
201 * that device and effects all jobs using the device.
203 class DEVICE: public SMARTALLOC {
205 int m_fd; /* file descriptor */
207 int m_blocked; /* set if we must wait (i.e. change tape) */
208 int m_count; /* Mutex use count -- DEBUG only */
209 int m_num_reserved; /* counter of device reservations */
210 bool m_append_reserve; /* reserved for append or read in m_num_reserved set */
211 int32_t m_slot; /* slot loaded in drive or -1 if none */
212 pthread_t m_pid; /* Thread that locked -- DEBUG only */
213 bool m_unload; /* set when Volume must be unloaded */
214 bool m_load; /* set when Volume must be loaded */
215 bool m_wait; /* must wait for device to free volume */
216 bthread_mutex_t m_mutex; /* access control */
217 bthread_mutex_t acquire_mutex; /* mutex for acquire code */
218 pthread_mutex_t read_acquire_mutex; /* mutex for acquire read code */
219 pthread_mutex_t volcat_mutex; /* VolCatInfo mutex */
220 pthread_mutex_t dcrs_mutex; /* Attached dcr mutex */
224 virtual ~DEVICE() {};
225 DEVICE * volatile swap_dev; /* Swap vol from this device */
226 dlist *attached_dcrs; /* attached DCR list */
227 bthread_mutex_t spool_mutex; /* mutex for updating spool_size */
228 pthread_cond_t wait; /* thread wait variable */
229 pthread_cond_t wait_next_vol; /* wait for tape to be mounted */
230 pthread_t no_wait_id; /* this thread must not wait */
231 int dev_prev_blocked; /* previous blocked state */
232 int num_waiting; /* number of threads waiting */
233 int num_writers; /* number of writing threads */
234 int capabilities; /* capabilities mask */
235 int state; /* state mask */
236 int dev_errno; /* Our own errno */
237 int mode; /* read/write modes */
238 int openmode; /* parameter passed to open_dev (useful to reopen the device) */
239 int dev_type; /* device type */
240 bool autoselect; /* Autoselect in autochanger */
241 bool read_only; /* Device is read only */
242 bool initiated; /* set when init_dev() called */
243 bool m_shstore; /* Shares storage can be used */
244 bool m_shstore_lock; /* set if shared lock set */
245 bool m_shstore_user_lock; /* set if user set shared lock */
246 bool m_shstore_register; /* set if register key set */
247 bool m_shstore_blocked; /* Set if I am blocked */
248 int label_type; /* Bacula/ANSI/IBM label types */
249 uint32_t drive_index; /* Autochanger drive index (base 0) */
250 POOLMEM *dev_name; /* Physical device name */
251 POOLMEM *prt_name; /* Name used for display purposes */
252 char *errmsg; /* nicely edited error message */
253 uint32_t block_num; /* current block number base 0 */
254 uint32_t LastBlock; /* last DEV_BLOCK number written to Volume */
255 uint32_t file; /* current file number base 0 */
256 uint64_t file_addr; /* Current file read/write address */
257 uint64_t file_size; /* Current file size */
258 uint32_t EndBlock; /* last block written */
259 uint32_t EndFile; /* last file written */
260 uint32_t min_block_size; /* min block size */
261 uint32_t max_block_size; /* max block size */
262 uint32_t max_concurrent_jobs; /* maximum simultaneous jobs this drive */
263 uint64_t max_volume_size; /* max bytes to put on one volume */
264 uint64_t max_file_size; /* max file size to put in one file on volume */
265 uint64_t volume_capacity; /* advisory capacity */
266 uint64_t max_spool_size; /* maximum spool file size */
267 uint64_t spool_size; /* current spool size for this device */
268 uint32_t max_rewind_wait; /* max secs to allow for rewind */
269 uint32_t max_open_wait; /* max secs to allow for open */
271 uint64_t max_part_size; /* max part size */
272 uint64_t part_size; /* current part size */
273 uint32_t part; /* current part number (starts at 0) */
274 uint64_t part_start; /* current part start address (relative to the whole volume) */
275 uint32_t num_dvd_parts; /* number of parts WRITTEN on the DVD */
276 /* state ST_FREESPACE_OK is set if free_space is valid */
277 uint64_t free_space; /* current free space on device */
278 uint64_t min_free_space; /* Minimum free disk space */
279 int free_space_errno; /* indicates errno getting freespace */
280 bool truncating; /* if set, we are currently truncating the DVD */
281 bool blank_dvd; /* if set, we have a blank DVD in the drive */
284 utime_t vol_poll_interval; /* interval between polling Vol mount */
285 DEVRES *device; /* pointer to Device Resource */
286 VOLRES *vol; /* Pointer to Volume reservation item */
287 btimer_t *tid; /* timer id */
289 VOLUME_CAT_INFO VolCatInfo; /* Volume Catalog Information */
290 VOLUME_LABEL VolHdr; /* Actual volume label */
291 char pool_name[MAX_NAME_LENGTH]; /* pool name */
292 char pool_type[MAX_NAME_LENGTH]; /* pool type */
294 char UnloadVolName[MAX_NAME_LENGTH]; /* Last wrong Volume mounted */
295 char lock_holder[12]; /* holder of SCSI lock */
296 bool poll; /* set to poll Volume */
297 /* Device wait times ***FIXME*** look at durations */
305 btime_t last_timer; /* used by read/write/seek to get stats (usec) */
306 btime_t last_tick; /* contains last read/write time (usec) */
309 btime_t DevWriteTime;
310 uint64_t DevWriteBytes;
311 uint64_t DevReadBytes;
314 btime_t get_timer_count(); /* return the last timer interval (ms) */
316 int has_cap(int cap) const { return capabilities & cap; }
317 void clear_cap(int cap) { capabilities &= ~cap; }
318 void set_cap(int cap) { capabilities |= cap; }
319 bool do_checksum() const { return (capabilities & CAP_BLOCKCHECKSUM) != 0; }
320 int is_autochanger() const { return capabilities & CAP_AUTOCHANGER; }
321 int requires_mount() const { return capabilities & CAP_REQMOUNT; }
322 int is_removable() const { return capabilities & CAP_REM; }
323 int is_tape() const { return (dev_type == B_TAPE_DEV ||
324 dev_type == B_VTAPE_DEV); }
325 int is_ftp() const { return dev_type == B_FTP_DEV; }
326 int is_file() const { return (dev_type == B_FILE_DEV); }
327 int is_fifo() const { return dev_type == B_FIFO_DEV; }
328 int is_dvd() const { return dev_type == B_DVD_DEV; }
329 int is_vtl() const { return dev_type == B_VTL_DEV; }
330 int is_vtape() const { return dev_type == B_VTAPE_DEV; }
331 int is_open() const { return m_fd >= 0; }
332 int is_offline() const { return state & ST_OFFLINE; }
333 int is_labeled() const { return state & ST_LABEL; }
334 int is_mounted() const { return state & ST_MOUNTED; }
335 int is_unmountable() const { return (is_dvd() || (is_file() && is_removable())); }
336 int num_reserved() const { return m_num_reserved; };
337 int is_part_spooled() const { return state & ST_PART_SPOOLED; }
338 int have_media() const { return state & ST_MEDIA; }
339 int is_short_block() const { return state & ST_SHORT; }
340 int is_busy() const { return (state & ST_READ) || num_writers || num_reserved(); }
341 bool is_reserved_for_read() const { return num_reserved() && !m_append_reserve; }
342 bool is_ateot() const { return (state & ST_EOF) && (state & ST_EOT) && (state & ST_WEOT); }
343 int at_eof() const { return state & ST_EOF; }
344 int at_eot() const { return state & ST_EOT; }
345 int at_weot() const { return state & ST_WEOT; }
346 int can_append() const { return state & ST_APPEND; }
347 int is_freespace_ok() const { return state & ST_FREESPACE_OK; }
348 int is_nospace() const { return (is_freespace_ok() && (state & ST_NOSPACE)); };
350 * can_write() is meant for checking at the end of a job to see
351 * if we still have a tape (perhaps not if at end of tape
352 * and the job is canceled).
354 int can_write() const { return is_open() && can_append() &&
355 is_labeled() && !at_weot(); }
356 bool can_read() const { return (state & ST_READ) != 0; }
357 bool can_steal_lock() const { return m_blocked &&
358 (m_blocked == BST_UNMOUNTED ||
359 m_blocked == BST_WAITING_FOR_SYSOP ||
360 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
361 bool waiting_for_mount() const { return
362 (m_blocked == BST_UNMOUNTED ||
363 m_blocked == BST_WAITING_FOR_SYSOP ||
364 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
365 bool must_unload() const { return m_unload; };
366 bool must_load() const { return m_load; };
367 const char *strerror() const;
368 const char *archive_name() const;
369 const char *name() const;
370 const char *print_name() const; /* Name for display purposes */
371 const char *print_type() const; /* in dev.c */
372 void set_ateof(); /* in dev.c */
373 void set_ateot(); /* in dev.c */
374 void set_eot() { state |= ST_EOT; };
375 void set_eof() { state |= ST_EOF; };
376 void set_labeled() { state |= ST_LABEL; };
377 void set_offline() { state |= ST_OFFLINE; };
378 void set_mounted() { state |= ST_MOUNTED; };
379 void set_media() { state |= ST_MEDIA; };
380 void set_short_block() { state |= ST_SHORT; };
381 void set_freespace_ok() { state |= ST_FREESPACE_OK; }
382 void set_part_spooled(int val) { if (val) state |= ST_PART_SPOOLED; \
383 else state &= ~ST_PART_SPOOLED;
385 bool is_volume_to_unload() const { \
386 return m_unload && strcmp(VolHdr.VolumeName, UnloadVolName) == 0; };
387 void set_load() { m_load = true; };
388 void set_wait() { m_wait = true; };
389 void clear_wait() { m_wait = false; };
390 bool must_wait() const { return m_wait; };
391 void inc_reserved() { m_num_reserved++; }
392 void set_mounted(int val) { if (val) state |= ST_MOUNTED; \
393 else state &= ~ST_MOUNTED; };
394 void dec_reserved() { m_num_reserved--; ASSERT(m_num_reserved>=0); };
395 void set_read_reserve() { m_append_reserve = false; };
396 void set_append_reserve() { m_append_reserve = true; };
397 void clear_labeled() { state &= ~ST_LABEL; };
398 void clear_offline() { state &= ~ST_OFFLINE; };
399 void clear_eot() { state &= ~ST_EOT; };
400 void clear_eof() { state &= ~ST_EOF; };
401 void clear_opened() { m_fd = -1; };
402 void clear_mounted() { state &= ~ST_MOUNTED; };
403 void clear_media() { state &= ~ST_MEDIA; };
404 void clear_short_block() { state &= ~ST_SHORT; };
405 void clear_freespace_ok() { state &= ~ST_FREESPACE_OK; };
406 void clear_unload() { m_unload = false; UnloadVolName[0] = 0; };
407 void clear_load() { m_load = false; };
408 char *bstrerror(void) { return errmsg; };
409 char *print_errmsg() { return errmsg; };
410 int32_t get_slot() const { return m_slot; };
411 void setVolCatInfo(bool valid) { VolCatInfo.is_valid = valid; };
412 bool haveVolCatInfo() const { return VolCatInfo.is_valid; };
413 void setVolCatName(const char *name) {
414 bstrncpy(VolCatInfo.VolCatName, name, sizeof(VolCatInfo.VolCatName));
415 setVolCatInfo(false);
417 void setVolCatStatus(const char *status) {
418 bstrncpy(VolCatInfo.VolCatStatus, status, sizeof(VolCatInfo.VolCatStatus));
419 setVolCatInfo(false);
422 void clearVolCatBytes() {
423 VolCatInfo.VolCatBytes = 0;
424 VolCatInfo.VolCatAmetaBytes = 0;
427 char *getVolCatName() { return VolCatInfo.VolCatName; };
429 void set_nospace(); /* in aligned.c */
430 void set_append(); /* in aligned.c */
431 void set_read(); /* in aligned.c */
432 void clear_nospace(); /* in aligned.c */
433 void clear_append(); /* in aligned.c */
434 void clear_read(); /* in aligned.c */
435 void set_unload(); /* in dev.c */
436 void clear_volhdr(); /* in dev.c */
437 void close_part(DCR *dcr); /* in dev.c */
438 void term(void); /* in dev.c */
439 ssize_t read(void *buf, size_t len); /* in dev.c */
440 ssize_t write(const void *buf, size_t len); /* in dev.c */
441 bool mount(int timeout); /* in dev.c */
442 bool unmount(int timeout); /* in dev.c */
443 void edit_mount_codes(POOL_MEM &omsg, const char *imsg); /* in dev.c */
444 bool offline_or_rewind(); /* in dev.c */
445 bool eod(DCR *dcr); /* in dev.c */
446 bool fsr(int num); /* in dev.c */
447 bool bsr(int num); /* in dev.c */
448 bool weof(int num); /* in dev.c */
449 int32_t get_os_tape_file(); /* in dev.c */
450 bool scan_dir_for_volume(DCR *dcr); /* in scan.c */
451 void clrerror(int func); /* in dev.c */
452 void set_slot(int32_t slot); /* in dev.c */
453 void clear_slot(); /* in dev.c */
454 void notify_newvol_in_attached_dcrs(const char *VolumeName); /* in dev.c */
455 void notify_newfile_in_attached_dcrs();/* in dev.c */
456 void attach_dcr_to_dev(DCR *dcr); /* in acquire.c */
457 void detach_dcr_from_dev(DCR *dcr); /* in acquire.c */
459 void updateVolCatBytes(uint64_t); /* in dev.c */
460 void updateVolCatBlocks(uint32_t); /* in dev.c */
461 void updateVolCatWrites(uint32_t); /* in dev.c */
462 void updateVolCatReads(uint32_t); /* in dev.c */
463 void updateVolCatReadBytes(uint64_t); /* in dev.c */
465 uint32_t get_file(); /* in dev.c */
466 uint32_t get_block_num(); /* in dev.c */
468 int fd() const { return m_fd; };
470 /* Virtual functions that can be overridden */
471 virtual int d_ioctl(int fd, ioctl_req_t request, char *mt_com=NULL);
472 virtual int d_open(const char *pathname, int flags);
473 virtual int d_close(int fd);
474 virtual ssize_t d_read(int fd, void *buffer, size_t count);
475 virtual ssize_t d_write(int fd, const void *buffer, size_t count);
476 virtual boffset_t lseek(DCR *dcr, boffset_t offset, int whence);
477 virtual bool update_pos(DCR *dcr);
478 virtual bool rewind(DCR *dcr);
479 virtual bool truncate(DCR *dcr);
480 virtual void open_device(DCR *dcr, int omode);
481 virtual void close(); /* in dev.c */
482 virtual bool open(DCR *dcr, int mode); /* in dev.c */
484 /* These could probably be made tape_dev only */
485 virtual bool bsf(int count) { return true; }
486 virtual bool fsf(int num) { return true; }
487 virtual bool offline() { return true; }
488 virtual void lock_door() { return; }
489 virtual void unlock_door() { return; }
490 virtual bool reposition(DCR *dcr, uint32_t rfile, uint32_t rblock);
494 * Locking and blocking calls
496 #ifdef DEV_DEBUG_LOCK
497 void dbg_Lock(const char *, int); /* in lock.c */
498 void dbg_Unlock(const char *, int); /* in lock.c */
499 void dbg_rLock(const char *, int, bool locked=false); /* in lock.c */
500 void dbg_rUnlock(const char *, int); /* in lock.c */
502 void Lock(); /* in lock.c */
503 void Unlock(); /* in lock.c */
504 void rLock(bool locked=false); /* in lock.c */
505 void rUnlock(); /* in lock.c */
507 void Lock_dcrs() { P(dcrs_mutex); };
508 void Unlock_dcrs() { V(dcrs_mutex); };
511 void dbg_Lock_acquire(const char *, int); /* in lock.c */
512 void dbg_Unlock_acquire(const char *, int); /* in lock.c */
513 void dbg_Lock_read_acquire(const char *, int); /* in lock.c */
514 void dbg_Unlock_read_acquire(const char *, int); /* in lock.c */
515 void dbg_Lock_VolCatInfo(const char *, int); /* in lock.c */
516 void dbg_Unlock_VolCatInfo(const char *, int); /* in lock.c */
518 void Lock_acquire(); /* in lock.c */
519 void Unlock_acquire(); /* in lock.c */
520 void Lock_read_acquire(); /* in lock.c */
521 void Unlock_read_acquire(); /* in lock.c */
522 void Lock_VolCatInfo(); /* in lock.c */
523 void Unlock_VolCatInfo(); /* in lock.c */
525 int init_mutex(); /* in lock.c */
526 int init_acquire_mutex(); /* in lock.c */
527 int init_read_acquire_mutex(); /* in lock.c */
528 int init_volcat_mutex(); /* in lock.c */
529 int init_dcrs_mutex(); /* in lock.c */
530 void set_mutex_priorities(); /* in lock.c */
531 int next_vol_timedwait(const struct timespec *timeout); /* in lock.c */
532 void dblock(int why); /* in lock.c */
533 void dunblock(bool locked=false); /* in lock.c */
534 bool is_device_unmounted(); /* in lock.c */
535 void set_blocked(int block) { m_blocked = block; };
536 int blocked() const { return m_blocked; };
537 bool is_blocked() const { return m_blocked != BST_NOT_BLOCKED; };
538 const char *print_blocked() const; /* in dev.c */
539 void open_tape_device(DCR *dcr, int omode); /* in dev.c */
540 void open_file_device(DCR *dcr, int omode); /* in dev.c */
543 bool do_tape_mount(int mount, int dotimeout); /* in dev.c */
544 bool do_file_mount(int mount, int dotimeout); /* in dev.c */
545 void set_mode(int omode); /* in dev.c */
547 inline const char *DEVICE::strerror() const { return errmsg; }
548 inline const char *DEVICE::archive_name() const { return dev_name; }
549 inline const char *DEVICE::print_name() const { return prt_name; }
552 #define CHECK_BLOCK_NUMBERS true
553 #define NO_BLOCK_NUMBER_CHECK false
556 * Device Context (or Control) Record.
557 * There is one of these records for each Job that is using
558 * the device. Items in this record are "local" to the Job and
559 * do not affect other Jobs. Note, a job can have multiple
560 * DCRs open, each pointing to a different device.
561 * Normally, there is only one JCR thread per DCR. However, the
562 * big and important exception to this is when a Job is being
563 * canceled. At that time, there may be two threads using the
564 * same DCR. Consequently, when creating/attaching/detaching
565 * and freeing the DCR we must lock it (m_mutex).
569 bool m_dev_locked; /* set if dev already locked */
570 int m_dev_lock; /* non-zero if rLock already called */
571 bool m_reserved; /* set if reserved device */
572 bool m_found_in_use; /* set if a volume found in use */
573 bool m_writing; /* set when DCR used for writing */
576 dlink dev_link; /* link to attach to dev */
577 JCR *jcr; /* pointer to JCR */
578 DEVICE * volatile dev; /* pointer to device */
579 DEVICE *ameta_dev; /* pointer to ameta_dev */
580 DEVRES *device; /* pointer to device resource */
581 DEV_BLOCK *block; /* pointer to block */
582 DEV_RECORD *rec; /* pointer to record */
583 pthread_t tid; /* Thread running this dcr */
584 int spool_fd; /* fd if spooling */
585 bool spool_data; /* set to spool data */
586 bool spooling; /* set when actually spooling */
587 bool despooling; /* set when despooling */
588 bool despool_wait; /* waiting for despooling */
589 bool NewVol; /* set if new Volume mounted */
590 bool WroteVol; /* set if Volume written */
591 bool NewFile; /* set when EOF written */
592 bool reserved_volume; /* set if we reserved a volume */
593 bool any_volume; /* Any OK for dir_find_next... */
594 bool attached_to_dev; /* set when attached to dev */
595 bool keep_dcr; /* do not free dcr in release_dcr */
596 uint32_t VolFirstIndex; /* First file index this Volume */
597 uint32_t VolLastIndex; /* Last file index this Volume */
598 uint32_t FileIndex; /* Current File Index */
599 uint32_t EndFile; /* End file written */
600 uint32_t StartFile; /* Start write file */
601 uint32_t StartBlock; /* Start write block */
602 uint32_t EndBlock; /* Ending block written */
603 int64_t VolMediaId; /* MediaId */
604 int64_t job_spool_size; /* Current job spool size */
605 int64_t max_job_spool_size; /* Max job spool size */
606 char VolumeName[MAX_NAME_LENGTH]; /* Volume name */
607 char pool_name[MAX_NAME_LENGTH]; /* pool name */
608 char pool_type[MAX_NAME_LENGTH]; /* pool type */
609 char media_type[MAX_NAME_LENGTH]; /* media type */
610 char dev_name[MAX_NAME_LENGTH]; /* dev name */
611 int Copy; /* identical copy number */
612 int Stripe; /* RAIT stripe */
613 VOLUME_CAT_INFO VolCatInfo; /* Catalog info for desired volume */
616 void set_dev(DEVICE *ndev) { dev = ndev; ameta_dev = ndev; };
617 void set_dev_locked() { m_dev_locked = true; };
618 void set_writing() { m_writing = true; };
619 void clear_writing() { m_writing = false; };
620 bool is_reading() const { return !m_writing; };
621 bool is_writing() const { return m_writing; };
622 void clear_dev_locked() { m_dev_locked = false; };
623 void inc_dev_lock() { m_dev_lock++; };
624 void dec_dev_lock() { m_dev_lock--; };
625 bool found_in_use() const { return m_found_in_use; };
626 void set_found_in_use() { m_found_in_use = true; };
627 void clear_found_in_use() { m_found_in_use = false; };
628 bool is_reserved() const { return m_reserved; };
629 bool is_dev_locked() const { return m_dev_locked; }
630 void setVolCatInfo(bool valid) { VolCatInfo.is_valid = valid; };
631 bool haveVolCatInfo() const { return VolCatInfo.is_valid; };
632 void setVolCatName(const char *name) {
633 bstrncpy(VolCatInfo.VolCatName, name, sizeof(VolCatInfo.VolCatName));
634 setVolCatInfo(false);
636 char *getVolCatName() { return VolCatInfo.VolCatName; };
638 /* Methods in autochanger.c */
639 bool is_virtual_autochanger();
641 /* Methods in lock.c */
642 void dblock(int why) { dev->dblock(why); }
644 /* Methods in record.c */
645 bool write_record(DEV_RECORD *rec);
647 /* Methods in read_record.c */
649 bool record_cb(DCR *dcr, DEV_RECORD *rec),
650 bool mount_cb(DCR *dcr));
651 bool try_repositioning(DEV_RECORD *rec);
652 BSR *position_to_first_file();
654 /* Methods in reserve.c */
655 void clear_reserved();
656 void set_reserved_for_read();
657 void set_reserved_for_append();
658 void unreserve_device(bool locked);
660 /* Methods in vol_mgr.c */
661 bool can_i_use_volume();
662 bool can_i_write_volume();
664 /* Methods in mount.c */
665 bool mount_next_write_volume();
666 bool mount_next_read_volume();
667 void mark_volume_in_error();
668 void mark_volume_not_inchanger();
669 int try_autolabel(bool opened);
670 bool find_a_volume();
671 bool is_suitable_volume_mounted();
673 int check_volume_label(bool &ask, bool &autochanger);
674 void release_volume();
675 void do_swapping(bool is_writing);
677 bool do_load(bool is_writing);
678 bool is_tape_position_ok();
680 /* Methods in block.c */
682 bool write_block_to_device();
683 bool write_block_to_dev();
684 bool read_block_from_device(bool check_block_numbers);
685 bool read_block_from_dev(bool check_block_numbers);
687 /* Methods in label.c */
688 bool rewrite_volume_label(bool recycle);
692 /* Get some definition of function to position
693 * to the end of the medium in MTEOM. System
694 * dependent. Arrgggg!