2 Bacula(R) - The Network Backup Solution
4 Copyright (C) 2000-2016 Kern Sibbald
6 The original author of Bacula is Kern Sibbald, with contributions
7 from many 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 This notice must be preserved when any source code is
15 conveyed and/or propagated.
17 Bacula(R) is a registered trademark of Kern Sibbald.
20 * Definitions for using the Device functions in Bacula
21 * Tape and File storage access
28 * Some details of how device reservations work
31 * set_load() set to load volume
32 * needs_load() volume must be loaded (i.e. set_load done)
33 * clear_load() load done.
34 * set_unload() set to unload volume
35 * needs_unload() volume must be unloaded
36 * clear_unload() volume unloaded
38 * reservations are temporary until the drive is acquired
39 * inc_reserved() increments num of reservations
40 * dec_reserved() decrements num of reservations
41 * num_reserved() number of reservations
44 * set_reserved() sets local reserve flag and calls dev->inc_reserved()
45 * clear_reserved() clears local reserve flag and calls dev->dec_reserved()
46 * is_reserved() returns local reserved flag
47 * unreserve_device() much more complete unreservation
54 #undef DCR /* used by Bacula */
56 /* Return values from wait_for_sysop() */
65 /* Arguments to open_dev() */
67 CREATE_READ_WRITE = 1,
75 * If you update this table, be sure to add an
76 * entry in prt_dev_types[] in dev.c
83 B_VTAPE_DEV, /* change to B_TAPE_DEV after init */
85 B_VTL_DEV, /* Virtual tape library device */
89 /* Generic status bits returned from status_dev() */
90 #define BMT_TAPE (1<<0) /* is tape device */
91 #define BMT_EOF (1<<1) /* just read EOF */
92 #define BMT_BOT (1<<2) /* at beginning of tape */
93 #define BMT_EOT (1<<3) /* end of tape reached */
94 #define BMT_SM (1<<4) /* DDS setmark */
95 #define BMT_EOD (1<<5) /* DDS at end of data */
96 #define BMT_WR_PROT (1<<6) /* tape write protected */
97 #define BMT_ONLINE (1<<7) /* tape online */
98 #define BMT_DR_OPEN (1<<8) /* tape door open */
99 #define BMT_IM_REP_EN (1<<9) /* immediate report enabled */
102 /* Bits for device capabilities */
103 #define CAP_EOF (1<<0) /* has MTWEOF */
104 #define CAP_BSR (1<<1) /* has MTBSR */
105 #define CAP_BSF (1<<2) /* has MTBSF */
106 #define CAP_FSR (1<<3) /* has MTFSR */
107 #define CAP_FSF (1<<4) /* has MTFSF */
108 #define CAP_EOM (1<<5) /* has MTEOM */
109 #define CAP_REM (1<<6) /* is removable media */
110 #define CAP_RACCESS (1<<7) /* is random access device */
111 #define CAP_AUTOMOUNT (1<<8) /* Read device at start to see what is there */
112 #define CAP_LABEL (1<<9) /* Label blank tapes */
113 #define CAP_ANONVOLS (1<<10) /* Mount without knowing volume name */
114 #define CAP_ALWAYSOPEN (1<<11) /* always keep device open */
115 #define CAP_AUTOCHANGER (1<<12) /* AutoChanger */
116 #define CAP_OFFLINEUNMOUNT (1<<13) /* Offline before unmount */
117 #define CAP_STREAM (1<<14) /* Stream device */
118 #define CAP_BSFATEOM (1<<15) /* Backspace file at EOM */
119 #define CAP_FASTFSF (1<<16) /* Fast forward space file */
120 #define CAP_TWOEOF (1<<17) /* Write two eofs for EOM */
121 #define CAP_CLOSEONPOLL (1<<18) /* Close device on polling */
122 #define CAP_POSITIONBLOCKS (1<<19) /* Use block positioning */
123 #define CAP_MTIOCGET (1<<20) /* Basic support for fileno and blkno */
124 #define CAP_REQMOUNT (1<<21) /* Require mount and unmount */
125 #define CAP_CHECKLABELS (1<<22) /* Check for ANSI/IBM labels */
126 #define CAP_BLOCKCHECKSUM (1<<23) /* Create/test block checksum */
129 #define dev_state(dev, st_state) ((dev)->state & (st_state))
131 /* Device state bits */
132 #define ST_XXXXXX (1<<0) /* was ST_OPENED */
133 #define ST_XXXXX (1<<1) /* was ST_TAPE */
134 #define ST_XXXX (1<<2) /* was ST_FILE */
135 #define ST_XXX (1<<3) /* was ST_FIFO */
136 #define ST_XX (1<<4) /* was ST_DVD */
137 #define ST_X (1<<5) /* was ST_PROG */
139 #define ST_LABEL (1<<6) /* label found */
140 #define ST_MALLOC (1<<7) /* dev packet malloc'ed in init_dev() */
141 #define ST_APPEND (1<<8) /* ready for Bacula append */
142 #define ST_READ (1<<9) /* ready for Bacula read */
143 #define ST_EOT (1<<10) /* at end of tape */
144 #define ST_WEOT (1<<11) /* Got EOT on write */
145 #define ST_EOF (1<<12) /* Read EOF i.e. zero bytes */
146 #define ST_NEXTVOL (1<<13) /* Start writing on next volume */
147 #define ST_SHORT (1<<14) /* Short block read */
148 #define ST_MOUNTED (1<<15) /* the device is mounted to the mount point */
149 #define ST_MEDIA (1<<16) /* Media found in mounted device */
150 #define ST_OFFLINE (1<<17) /* set offline by operator */
151 #define ST_PART_SPOOLED (1<<18) /* spooling part */
152 #define ST_FREESPACE_OK (1<<19) /* Have valid freespace */
153 #define ST_NOSPACE (1<<20) /* No space on device */
156 /* Volume Catalog Information structure definition */
157 struct VOLUME_CAT_INFO {
158 /* Media info for the current Volume */
159 uint64_t VolCatBytes; /* Total bytes written */
160 uint64_t VolCatAmetaBytes; /* Ameta bytes written */
161 uint64_t VolCatAdataBytes; /* Adata bytes written */
162 uint64_t VolCatPadding; /* Total padding bytes written */
163 uint64_t VolCatAmetaPadding; /* Ameta zeros (padding) written */
164 uint64_t VolCatAdataPadding; /* Adata zeros (padding) written */
165 uint32_t VolCatBlocks; /* Total blocks */
166 uint32_t VolCatAmetaBlocks; /* Ameta blocks */
167 uint32_t VolCatAdataBlocks; /* Adata blocks */
168 uint32_t VolCatWrites; /* Total writes this volume */
169 uint32_t VolCatAmetaWrites; /* Ameta writes this volume */
170 uint32_t VolCatAdataWrites; /* Adata writes this volume */
171 uint32_t VolCatReads; /* Total reads this volume */
172 uint32_t VolCatAmetaReads; /* Ameta reads this volume */
173 uint32_t VolCatAdataReads; /* Adata reads this volume */
174 uint64_t VolCatRBytes; /* Total bytes read */
175 uint64_t VolCatAmetaRBytes; /* Ameta bytes read */
176 uint64_t VolCatAdataRBytes; /* Adata bytes read */
177 uint64_t VolCatHoleBytes; /* Total hole bytes */
179 uint32_t VolCatHoles; /* Number of holes */
180 uint32_t VolCatJobs; /* Number of jobs on this Volume */
181 uint32_t VolCatFiles; /* Number of files */
182 uint32_t VolCatType; /* Volume drive type */
183 uint32_t VolCatMounts; /* Number of mounts this volume */
184 uint32_t VolCatErrors; /* Number of errors this volume */
185 uint32_t VolCatRecycles; /* Number of recycles this volume */
186 uint32_t EndFile; /* Last file number */
187 uint32_t EndBlock; /* Last block number */
188 int32_t LabelType; /* Bacula/ANSI/IBM */
189 int32_t Slot; /* >0=Slot loaded, 0=nothing, -1=unknown */
190 uint32_t VolCatMaxJobs; /* Maximum Jobs to write to volume */
191 uint32_t VolCatMaxFiles; /* Maximum files to write to volume */
192 uint64_t VolCatMaxBytes; /* Max bytes to write to volume */
193 uint64_t VolCatCapacityBytes; /* capacity estimate */
194 btime_t VolReadTime; /* time spent reading */
195 btime_t VolWriteTime; /* time spent writing this Volume */
196 int64_t VolMediaId; /* MediaId */
197 int64_t VolScratchPoolId; /* ScratchPoolId */
198 utime_t VolFirstWritten; /* Time of first write */
199 utime_t VolLastWritten; /* Time of last write */
200 bool InChanger; /* Set if vol in current magazine */
201 bool is_valid; /* set if this data is valid */
202 char VolCatStatus[20]; /* Volume status */
203 char VolCatName[MAX_NAME_LENGTH]; /* Desired volume to mount */
206 class DEVRES; /* Device resource defined in stored_conf.h */
207 class DCR; /* forward reference */
208 class VOLRES; /* forward reference */
211 * Device structure definition. There is one of these for
212 * each physical device. Everything here is "global" to
213 * that device and effects all jobs using the device.
215 class DEVICE: public SMARTALLOC {
217 int m_fd; /* file descriptor */
219 int m_blocked; /* set if we must wait (i.e. change tape) */
220 int m_count; /* Mutex use count -- DEBUG only */
221 int m_num_reserved; /* counter of device reservations */
222 pthread_t m_pid; /* Thread that locked -- DEBUG only */
223 int32_t m_slot; /* slot loaded in drive or -1 if none */
224 bool m_unload; /* set when Volume must be unloaded */
225 bool m_load; /* set when Volume must be loaded */
226 bool m_wait; /* must wait for device to free volume */
227 bool m_append_reserve; /* reserved for append or read in m_num_reserved set */
228 bthread_mutex_t m_mutex; /* access control */
229 bthread_mutex_t acquire_mutex; /* mutex for acquire code */
230 pthread_mutex_t read_acquire_mutex; /* mutex for acquire read code */
231 pthread_mutex_t volcat_mutex; /* VolCatInfo mutex */
232 pthread_mutex_t dcrs_mutex; /* Attached dcr mutex */
233 pthread_mutex_t freespace_mutex; /* mutex to compute the freespace */
237 virtual ~DEVICE() {};
238 DEVICE * volatile swap_dev; /* Swap vol from this device */
239 dlist *attached_dcrs; /* attached DCR list */
240 bthread_mutex_t spool_mutex; /* mutex for updating spool_size */
241 pthread_cond_t wait; /* thread wait variable */
242 pthread_cond_t wait_next_vol; /* wait for tape to be mounted */
243 pthread_t no_wait_id; /* this thread must not wait */
244 int dev_prev_blocked; /* previous blocked state */
245 int num_waiting; /* number of threads waiting */
246 int num_writers; /* number of writing threads */
247 int capabilities; /* capabilities mask */
248 int state; /* state mask */
249 int dev_errno; /* Our own errno */
250 int mode; /* read/write modes */
251 int openmode; /* parameter passed to open_dev (useful to reopen the device) */
252 int dev_type; /* device type */
253 bool enabled; /* Set when enabled */
254 bool autoselect; /* Autoselect in autochanger */
255 bool read_only; /* Device is read only */
256 bool initiated; /* set when init_dev() called */
257 int label_type; /* Bacula/ANSI/IBM label types */
258 uint32_t drive_index; /* Autochanger drive index (base 0) */
259 POOLMEM *dev_name; /* Physical device name */
260 POOLMEM *prt_name; /* Name used for display purposes */
261 char *errmsg; /* nicely edited error message */
262 uint32_t block_num; /* current block number base 0 */
263 uint32_t LastBlock; /* last DEV_BLOCK number written to Volume */
264 uint32_t file; /* current file number base 0 */
265 uint64_t file_addr; /* Current file read/write address */
266 uint64_t file_size; /* Current file size */
267 uint32_t EndBlock; /* last block written */
268 uint32_t EndFile; /* last file written */
269 uint32_t min_block_size; /* min block size */
270 uint32_t max_block_size; /* max block size */
271 uint32_t max_concurrent_jobs; /* maximum simultaneous jobs this drive */
272 uint64_t max_volume_size; /* max bytes to put on one volume */
273 uint64_t max_file_size; /* max file size to put in one file on volume */
274 uint64_t volume_capacity; /* advisory capacity */
275 uint64_t max_spool_size; /* maximum spool file size */
276 uint64_t spool_size; /* current spool size for this device */
277 uint32_t max_rewind_wait; /* max secs to allow for rewind */
278 uint32_t max_open_wait; /* max secs to allow for open */
280 uint64_t max_part_size; /* max part size */
281 uint64_t part_size; /* current part size */
282 uint32_t part; /* current part number (starts at 0) */
283 uint64_t part_start; /* current part start address (relative to the whole volume) */
284 uint32_t num_dvd_parts; /* number of parts WRITTEN on the DVD */
285 /* state ST_FREESPACE_OK is set if free_space is valid */
286 uint64_t free_space; /* current free space on device */
287 uint64_t total_space; /* current used space on device */
288 uint64_t devno; /* device id */
289 uint64_t min_free_space; /* Minimum free disk space */
290 int free_space_errno; /* indicates errno getting freespace */
291 bool truncating; /* if set, we are currently truncating the DVD */
292 bool blank_dvd; /* if set, we have a blank DVD in the drive */
295 utime_t vol_poll_interval; /* interval between polling Vol mount */
296 DEVRES *device; /* pointer to Device Resource */
297 VOLRES *vol; /* Pointer to Volume reservation item */
298 btimer_t *tid; /* timer id */
300 VOLUME_CAT_INFO VolCatInfo; /* Volume Catalog Information */
301 VOLUME_LABEL VolHdr; /* Actual volume label */
302 char pool_name[MAX_NAME_LENGTH]; /* pool name */
303 char pool_type[MAX_NAME_LENGTH]; /* pool type */
305 char UnloadVolName[MAX_NAME_LENGTH]; /* Last wrong Volume mounted */
306 char lock_holder[12]; /* holder of SCSI lock */
307 bool poll; /* set to poll Volume */
308 /* Device wait times ***FIXME*** look at durations */
316 btime_t last_timer; /* used by read/write/seek to get stats (usec) */
317 btime_t last_tick; /* contains last read/write time (usec) */
320 btime_t DevWriteTime;
321 uint64_t DevWriteBytes;
322 uint64_t DevReadBytes;
325 btime_t get_timer_count(); /* return the last timer interval (ms) */
327 int has_cap(int cap) const { return capabilities & cap; }
328 void clear_cap(int cap) { capabilities &= ~cap; }
329 void set_cap(int cap) { capabilities |= cap; }
330 bool do_checksum() const { return (capabilities & CAP_BLOCKCHECKSUM) != 0; }
331 int is_autochanger() const { return capabilities & CAP_AUTOCHANGER; }
332 int requires_mount() const { return capabilities & CAP_REQMOUNT; }
333 int is_removable() const { return capabilities & CAP_REM; }
334 bool is_tape() const { return (dev_type == B_TAPE_DEV ||
335 dev_type == B_VTAPE_DEV); }
336 bool is_ftp() const { return dev_type == B_FTP_DEV; }
337 bool is_file() const { return (dev_type == B_FILE_DEV); }
338 bool is_null() const { return dev_type == B_NULL_DEV; }
339 bool is_fifo() const { return dev_type == B_FIFO_DEV; }
340 bool is_dvd() const { return dev_type == B_DVD_DEV; }
341 bool is_vtl() const { return dev_type == B_VTL_DEV; }
342 bool is_vtape() const { return dev_type == B_VTAPE_DEV; }
343 bool is_open() const { return m_fd >= 0; }
344 int is_offline() const { return state & ST_OFFLINE; }
345 int is_labeled() const { return state & ST_LABEL; }
346 int is_mounted() const { return state & ST_MOUNTED; }
347 int is_unmountable() const { return (is_dvd() || (is_file() && is_removable())); }
348 int num_reserved() const { return m_num_reserved; };
349 int is_part_spooled() const { return state & ST_PART_SPOOLED; }
350 int have_media() const { return state & ST_MEDIA; }
351 int is_short_block() const { return state & ST_SHORT; }
352 int is_busy() const { return (state & ST_READ) || num_writers || num_reserved(); }
353 bool is_reserved_for_read() const { return num_reserved() && !m_append_reserve; }
354 bool is_ateot() const { return (state & ST_EOF) && (state & ST_EOT) && (state & ST_WEOT); }
355 int at_eof() const { return state & ST_EOF; }
356 int at_eot() const { return state & ST_EOT; }
357 int at_weot() const { return state & ST_WEOT; }
358 int can_append() const { return state & ST_APPEND; }
359 int is_freespace_ok() const { return state & ST_FREESPACE_OK; }
360 int is_nospace() const { return (is_freespace_ok() && (state & ST_NOSPACE)); };
362 * can_write() is meant for checking at the end of a job to see
363 * if we still have a tape (perhaps not if at end of tape
364 * and the job is canceled).
366 int can_write() const { return is_open() && can_append() &&
367 is_labeled() && !at_weot(); }
368 bool can_read() const { return (state & ST_READ) != 0; }
369 bool can_steal_lock() const { return m_blocked &&
370 (m_blocked == BST_UNMOUNTED ||
371 m_blocked == BST_WAITING_FOR_SYSOP ||
372 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
373 bool waiting_for_mount() const { return
374 (m_blocked == BST_UNMOUNTED ||
375 m_blocked == BST_WAITING_FOR_SYSOP ||
376 m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
377 bool must_unload() const { return m_unload; };
378 bool must_load() const { return m_load; };
379 const char *strerror() const;
380 const char *archive_name() const;
381 const char *name() const;
382 const char *print_name() const; /* Name for display purposes */
383 const char *print_type() const; /* in dev.c */
384 void set_ateof(); /* in dev.c */
385 void set_ateot(); /* in dev.c */
386 void set_eot() { state |= ST_EOT; };
387 void set_eof() { state |= ST_EOF; };
388 void set_labeled() { state |= ST_LABEL; };
389 void set_offline() { state |= ST_OFFLINE; };
390 void set_mounted() { state |= ST_MOUNTED; };
391 void set_media() { state |= ST_MEDIA; };
392 void set_short_block() { state |= ST_SHORT; };
393 void set_freespace_ok() { state |= ST_FREESPACE_OK; }
394 void set_part_spooled(int val) { if (val) state |= ST_PART_SPOOLED; \
395 else state &= ~ST_PART_SPOOLED;
397 void get_freespace(uint64_t *freeval, uint64_t *totalval); /* in dev.c */
398 void set_freespace(uint64_t freeval, uint64_t totalval, int errnoval, bool valid); /* in dev.c */
399 bool is_volume_to_unload() const { \
400 return m_unload && strcmp(VolHdr.VolumeName, UnloadVolName) == 0; };
401 void set_load() { m_load = true; };
402 void set_wait() { m_wait = true; };
403 void clear_wait() { m_wait = false; };
404 bool must_wait() const { return m_wait; };
405 void inc_reserved() { m_num_reserved++; }
406 void set_mounted(int val) { if (val) state |= ST_MOUNTED; \
407 else state &= ~ST_MOUNTED; };
408 void dec_reserved() { m_num_reserved--; ASSERT(m_num_reserved>=0); };
409 void set_read_reserve() { m_append_reserve = false; };
410 void set_append_reserve() { m_append_reserve = true; };
411 void clear_labeled() { state &= ~ST_LABEL; };
412 void clear_offline() { state &= ~ST_OFFLINE; };
413 void clear_eot() { state &= ~ST_EOT; };
414 void clear_eof() { state &= ~ST_EOF; };
415 void clear_opened() { m_fd = -1; };
416 void clear_mounted() { state &= ~ST_MOUNTED; };
417 void clear_media() { state &= ~ST_MEDIA; };
418 void clear_short_block() { state &= ~ST_SHORT; };
419 void clear_freespace_ok() { state &= ~ST_FREESPACE_OK; };
420 void clear_unload() { m_unload = false; UnloadVolName[0] = 0; };
421 void clear_load() { m_load = false; };
422 char *bstrerror(void) { return errmsg; };
423 char *print_errmsg() { return errmsg; };
424 int32_t get_slot() const { return m_slot; };
425 void setVolCatInfo(bool valid) { VolCatInfo.is_valid = valid; };
426 bool haveVolCatInfo() const { return VolCatInfo.is_valid; };
427 void setVolCatName(const char *name) {
428 bstrncpy(VolCatInfo.VolCatName, name, sizeof(VolCatInfo.VolCatName));
429 setVolCatInfo(false);
431 void setVolCatStatus(const char *status) {
432 bstrncpy(VolCatInfo.VolCatStatus, status, sizeof(VolCatInfo.VolCatStatus));
433 setVolCatInfo(false);
436 void clearVolCatBytes() {
437 VolCatInfo.VolCatBytes = 0;
438 VolCatInfo.VolCatAmetaBytes = 0;
439 VolCatInfo.VolCatAdataBytes = 0;
442 char *getVolCatName() { return VolCatInfo.VolCatName; };
444 void set_nospace(); /* in aligned.c */
445 void set_append(); /* in aligned.c */
446 void set_read(); /* in aligned.c */
447 void clear_nospace(); /* in aligned.c */
448 void clear_append(); /* in aligned.c */
449 void clear_read(); /* in aligned.c */
450 void set_unload(); /* in dev.c */
451 void clear_volhdr(); /* in dev.c */
452 void close_part(DCR *dcr); /* in dev.c */
453 void term(void); /* in dev.c */
454 ssize_t read(void *buf, size_t len); /* in dev.c */
455 ssize_t write(const void *buf, size_t len); /* in dev.c */
456 void edit_mount_codes(POOL_MEM &omsg, const char *imsg); /* in dev.c */
457 bool offline_or_rewind(); /* in dev.c */
458 bool eod(DCR *dcr); /* in dev.c */
459 bool fsr(int num); /* in dev.c */
460 bool bsr(int num); /* in dev.c */
461 bool weof(int num); /* in dev.c */
462 int32_t get_os_tape_file(); /* in dev.c */
463 bool scan_dir_for_volume(DCR *dcr); /* in scan.c */
464 void clrerror(int func); /* in dev.c */
465 void set_slot(int32_t slot); /* in dev.c */
466 void clear_slot(); /* in dev.c */
467 bool update_freespace(); /* in dev.c */
468 bool get_os_device_freespace(); /* in dev.c */
469 void notify_newvol_in_attached_dcrs(const char *VolumeName); /* in dev.c */
470 void notify_newfile_in_attached_dcrs();/* in dev.c */
471 void attach_dcr_to_dev(DCR *dcr); /* in acquire.c */
472 void detach_dcr_from_dev(DCR *dcr); /* in acquire.c */
474 void updateVolCatBytes(uint64_t); /* in dev.c */
475 void updateVolCatBlocks(uint32_t); /* in dev.c */
476 void updateVolCatWrites(uint32_t); /* in dev.c */
477 void updateVolCatReads(uint32_t); /* in dev.c */
478 void updateVolCatReadBytes(uint64_t); /* in dev.c */
479 void updateVolCatPadding(uint64_t); /* in dev.c */
480 void updateVolCatHoleBytes(uint64_t); /* in dev.c */
482 uint32_t get_file(); /* in dev.c */
483 uint32_t get_block_num(); /* in dev.c */
485 int fd() const { return m_fd; };
486 bool mount_file(int mount, int dottimout);
488 /* Virtual functions that can be overridden */
489 virtual int d_ioctl(int fd, ioctl_req_t request, char *mt_com=NULL);
490 virtual int d_open(const char *pathname, int flags);
491 virtual int d_close(int fd);
492 virtual ssize_t d_read(int fd, void *buffer, size_t count);
493 virtual ssize_t d_write(int fd, const void *buffer, size_t count);
494 virtual boffset_t lseek(DCR *dcr, boffset_t offset, int whence);
495 virtual bool update_pos(DCR *dcr);
496 virtual bool rewind(DCR *dcr);
497 virtual bool truncate(DCR *dcr);
498 virtual void open_device(DCR *dcr, int omode);
499 virtual bool close(); /* in dev.c */
500 virtual bool open(DCR *dcr, int mode); /* in dev.c */
501 virtual bool mount(int timeout);
502 virtual bool unmount(int timeout);
505 /* These could probably be made tape_dev only */
506 virtual bool bsf(int count) { return true; }
507 virtual bool fsf(int num) { return true; }
508 virtual bool offline() { return true; }
509 virtual void lock_door() { return; }
510 virtual void unlock_door() { return; }
511 virtual bool reposition(DCR *dcr, uint32_t rfile, uint32_t rblock);
514 * Locking and blocking calls
516 #ifdef DEV_DEBUG_LOCK
517 void dbg_Lock(const char *, int); /* in lock.c */
518 void dbg_Unlock(const char *, int); /* in lock.c */
519 void dbg_rLock(const char *, int, bool locked=false); /* in lock.c */
520 void dbg_rUnlock(const char *, int); /* in lock.c */
522 void Lock(); /* in lock.c */
523 void Unlock(); /* in lock.c */
524 void rLock(bool locked=false); /* in lock.c */
525 void rUnlock(); /* in lock.c */
527 void Lock_dcrs() { P(dcrs_mutex); };
528 void Unlock_dcrs() { V(dcrs_mutex); };
531 void dbg_Lock_acquire(const char *, int); /* in lock.c */
532 void dbg_Unlock_acquire(const char *, int); /* in lock.c */
533 void dbg_Lock_read_acquire(const char *, int); /* in lock.c */
534 void dbg_Unlock_read_acquire(const char *, int); /* in lock.c */
535 void dbg_Lock_VolCatInfo(const char *, int); /* in lock.c */
536 void dbg_Unlock_VolCatInfo(const char *, int); /* in lock.c */
538 void Lock_acquire(); /* in lock.c */
539 void Unlock_acquire(); /* in lock.c */
540 void Lock_read_acquire(); /* in lock.c */
541 void Unlock_read_acquire(); /* in lock.c */
542 void Lock_VolCatInfo(); /* in lock.c */
543 void Unlock_VolCatInfo(); /* in lock.c */
545 int init_mutex(); /* in lock.c */
546 int init_acquire_mutex(); /* in lock.c */
547 int init_read_acquire_mutex(); /* in lock.c */
548 int init_volcat_mutex(); /* in lock.c */
549 int init_dcrs_mutex(); /* in lock.c */
550 int init_freespace_mutex(); /* in lock.c */
551 void set_mutex_priorities(); /* in lock.c */
552 int next_vol_timedwait(const struct timespec *timeout); /* in lock.c */
553 void dblock(int why); /* in lock.c */
554 void dunblock(bool locked=false); /* in lock.c */
555 bool is_device_unmounted(); /* in lock.c */
556 void set_blocked(int block) { m_blocked = block; };
557 int blocked() const { return m_blocked; };
558 bool is_blocked() const { return m_blocked != BST_NOT_BLOCKED; };
559 const char *print_blocked() const; /* in dev.c */
560 void open_tape_device(DCR *dcr, int omode); /* in dev.c */
561 void open_file_device(DCR *dcr, int omode); /* in dev.c */
564 bool mount_tape(int mount, int dotimeout); /* in dev.c */
566 void set_mode(int omode); /* in dev.c */
568 inline const char *DEVICE::strerror() const { return errmsg; }
569 inline const char *DEVICE::archive_name() const { return dev_name; }
570 inline const char *DEVICE::print_name() const { return NPRT(prt_name); }
573 #define CHECK_BLOCK_NUMBERS true
574 #define NO_BLOCK_NUMBER_CHECK false
577 * Device Context (or Control) Record.
578 * There is one of these records for each Job that is using
579 * the device. Items in this record are "local" to the Job and
580 * do not affect other Jobs. Note, a job can have multiple
581 * DCRs open, each pointing to a different device.
582 * Normally, there is only one JCR thread per DCR. However, the
583 * big and important exception to this is when a Job is being
584 * canceled. At that time, there may be two threads using the
585 * same DCR. Consequently, when creating/attaching/detaching
586 * and freeing the DCR we must lock it (m_mutex).
590 bool m_dev_locked; /* set if dev already locked */
591 int m_dev_lock; /* non-zero if rLock already called */
592 bool m_reserved; /* set if reserved device */
593 bool m_found_in_use; /* set if a volume found in use */
594 bool m_writing; /* set when DCR used for writing */
597 dlink dev_link; /* link to attach to dev */
598 JCR *jcr; /* pointer to JCR */
599 DEVICE * volatile dev; /* pointer to device */
600 DEVICE *ameta_dev; /* pointer to ameta_dev */
601 DEVRES *device; /* pointer to device resource */
602 DEV_BLOCK *block; /* pointer to block */
603 DEV_BLOCK *ameta_block; /* meta data block */
604 DEV_RECORD *rec; /* pointer to record */
605 pthread_t tid; /* Thread running this dcr */
606 int spool_fd; /* fd if spooling */
607 bool spool_data; /* set to spool data */
608 bool spooling; /* set when actually spooling */
609 bool despooling; /* set when despooling */
610 bool despool_wait; /* waiting for despooling */
611 bool NewVol; /* set if new Volume mounted */
612 bool WroteVol; /* set if Volume written */
613 bool NewFile; /* set when EOF written */
614 bool reserved_volume; /* set if we reserved a volume */
615 bool any_volume; /* Any OK for dir_find_next... */
616 bool attached_to_dev; /* set when attached to dev */
617 bool keep_dcr; /* do not free dcr in release_dcr */
618 bool no_mount_request; /* do not submit any mount request */
619 uint32_t VolFirstIndex; /* First file index this Volume */
620 uint32_t VolLastIndex; /* Last file index this Volume */
621 uint32_t FileIndex; /* Current File Index */
622 uint32_t EndFile; /* End file written */
623 uint32_t StartFile; /* Start write file */
624 uint32_t StartBlock; /* Start write block */
625 uint32_t EndBlock; /* Ending block written */
626 int64_t VolMediaId; /* MediaId */
627 int64_t job_spool_size; /* Current job spool size */
628 int64_t max_job_spool_size; /* Max job spool size */
629 char VolumeName[MAX_NAME_LENGTH]; /* Volume name */
630 char pool_name[MAX_NAME_LENGTH]; /* pool name */
631 char pool_type[MAX_NAME_LENGTH]; /* pool type */
632 char media_type[MAX_NAME_LENGTH]; /* media type */
633 char dev_name[MAX_NAME_LENGTH]; /* dev name */
634 int Copy; /* identical copy number */
635 int Stripe; /* RAIT stripe */
636 VOLUME_CAT_INFO VolCatInfo; /* Catalog info for desired volume */
639 void set_no_mount_request() { no_mount_request = true; }; /* Just fail in case of mount request */
640 void set_dev(DEVICE *ndev) { dev = ndev; ameta_dev = ndev; };
641 void set_ameta() { dev = ameta_dev; block = ameta_block; };
642 void set_dev_locked() { m_dev_locked = true; };
643 void set_writing() { m_writing = true; };
644 void clear_writing() { m_writing = false; };
645 bool is_reading() const { return !m_writing; };
646 bool is_writing() const { return m_writing; };
647 void clear_dev_locked() { m_dev_locked = false; };
648 void inc_dev_lock() { m_dev_lock++; };
649 void dec_dev_lock() { m_dev_lock--; };
650 bool found_in_use() const { return m_found_in_use; };
651 void set_found_in_use() { m_found_in_use = true; };
652 void clear_found_in_use() { m_found_in_use = false; };
653 bool is_reserved() const { return m_reserved; };
654 bool is_dev_locked() const { return m_dev_locked; }
655 void setVolCatInfo(bool valid) { VolCatInfo.is_valid = valid; };
656 bool haveVolCatInfo() const { return VolCatInfo.is_valid; };
657 void setVolCatName(const char *name) {
658 bstrncpy(VolCatInfo.VolCatName, name, sizeof(VolCatInfo.VolCatName));
659 setVolCatInfo(false);
661 char *getVolCatName() { return VolCatInfo.VolCatName; };
662 bool write_final_block_to_device() { return write_block_to_device(true); };
664 /* Methods in autochanger.c */
665 bool is_virtual_autochanger();
667 /* Methods in lock.c */
668 void dblock(int why) { dev->dblock(why); }
670 /* Methods in record.c */
671 bool write_record(DEV_RECORD *rec);
673 /* Methods in read_record.c */
675 bool record_cb(DCR *dcr, DEV_RECORD *rec),
676 bool mount_cb(DCR *dcr));
677 bool try_repositioning(DEV_RECORD *rec);
678 BSR *position_to_first_file();
680 /* Methods in reserve.c */
681 void clear_reserved();
682 void set_reserved_for_read();
683 void set_reserved_for_append();
684 void unreserve_device(bool locked);
686 /* Methods in vol_mgr.c */
687 bool can_i_use_volume();
688 bool can_i_write_volume();
690 /* Methods in mount.c */
691 bool mount_next_write_volume();
692 bool mount_next_read_volume();
693 void mark_volume_in_error();
694 void mark_volume_not_inchanger();
695 int try_autolabel(bool opened);
696 bool find_a_volume();
697 bool is_suitable_volume_mounted();
699 int check_volume_label(bool &ask, bool &autochanger);
700 void release_volume();
701 void do_swapping(bool is_writing);
703 bool do_load(bool is_writing);
704 bool is_tape_position_ok();
706 /* Methods in block.c */
708 bool write_block_to_device(bool final=false);
709 bool write_block_to_dev();
710 bool read_block_from_device(bool check_block_numbers);
711 bool read_block_from_dev(bool check_block_numbers);
713 /* Methods in label.c */
714 bool rewrite_volume_label(bool recycle);
718 /* Get some definition of function to position
719 * to the end of the medium in MTEOM. System
720 * dependent. Arrgggg!