2 * Definitions for using the Device functions in Bacula
3 * Tape and File storage access
11 Copyright (C) 2000-2005 Kern Sibbald
13 This program is free software; you can redistribute it and/or
14 modify it under the terms of the GNU General Public License
15 version 2 as amended with additional clauses defined in the
16 file LICENSE in the main source directory.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 the file LICENSE for additional details.
29 #undef DCR /* used by Bacula */
31 /* #define NEW_LOCK 1 */
33 #define new_lock_device(dev) _new_lock_device(__FILE__, __LINE__, (dev))
34 #define new_lock_device_state(dev,state) _new_lock_device(__FILE__, __LINE__, (dev), (state))
35 #define new_unlock_device(dev) _new_unlock_device(__FILE__, __LINE__, (dev))
37 #define lock_device(d) _lock_device(__FILE__, __LINE__, (d))
38 #define unlock_device(d) _unlock_device(__FILE__, __LINE__, (d))
39 #define block_device(d, s) _block_device(__FILE__, __LINE__, (d), s)
40 #define unblock_device(d) _unblock_device(__FILE__, __LINE__, (d))
41 #define steal_device_lock(d, p, s) _steal_device_lock(__FILE__, __LINE__, (d), (p), s)
42 #define give_back_device_lock(d, p) _give_back_device_lock(__FILE__, __LINE__, (d), (p))
44 /* Arguments to open_dev() */
46 CREATE_READ_WRITE = 1,
52 /* Generic status bits returned from status_dev() */
53 #define BMT_TAPE (1<<0) /* is tape device */
54 #define BMT_EOF (1<<1) /* just read EOF */
55 #define BMT_BOT (1<<2) /* at beginning of tape */
56 #define BMT_EOT (1<<3) /* end of tape reached */
57 #define BMT_SM (1<<4) /* DDS setmark */
58 #define BMT_EOD (1<<5) /* DDS at end of data */
59 #define BMT_WR_PROT (1<<6) /* tape write protected */
60 #define BMT_ONLINE (1<<7) /* tape online */
61 #define BMT_DR_OPEN (1<<8) /* tape door open */
62 #define BMT_IM_REP_EN (1<<9) /* immediate report enabled */
65 /* Test capabilities */
66 #define dev_cap(dev, cap) ((dev)->capabilities & (cap))
68 /* Bits for device capabilities */
69 #define CAP_EOF (1<<0) /* has MTWEOF */
70 #define CAP_BSR (1<<1) /* has MTBSR */
71 #define CAP_BSF (1<<2) /* has MTBSF */
72 #define CAP_FSR (1<<3) /* has MTFSR */
73 #define CAP_FSF (1<<4) /* has MTFSF */
74 #define CAP_EOM (1<<5) /* has MTEOM */
75 #define CAP_REM (1<<6) /* is removable media */
76 #define CAP_RACCESS (1<<7) /* is random access device */
77 #define CAP_AUTOMOUNT (1<<8) /* Read device at start to see what is there */
78 #define CAP_LABEL (1<<9) /* Label blank tapes */
79 #define CAP_ANONVOLS (1<<10) /* Mount without knowing volume name */
80 #define CAP_ALWAYSOPEN (1<<11) /* always keep device open */
81 #define CAP_AUTOCHANGER (1<<12) /* AutoChanger */
82 #define CAP_OFFLINEUNMOUNT (1<<13) /* Offline before unmount */
83 #define CAP_STREAM (1<<14) /* Stream device */
84 #define CAP_BSFATEOM (1<<15) /* Backspace file at EOM */
85 #define CAP_FASTFSF (1<<16) /* Fast forward space file */
86 #define CAP_TWOEOF (1<<17) /* Write two eofs for EOM */
87 #define CAP_CLOSEONPOLL (1<<18) /* Close device on polling */
88 #define CAP_POSITIONBLOCKS (1<<19) /* Use block positioning */
89 #define CAP_MTIOCGET (1<<20) /* Basic support for fileno and blkno */
90 #define CAP_REQMOUNT (1<<21) /* Require mount to read files back (typically: DVD) */
91 #define CAP_CHECKLABELS (1<<22) /* Check for ANSI/IBM labels */
94 #define dev_state(dev, st_state) ((dev)->state & (st_state))
96 /* Device state bits */
97 #define ST_OPENED (1<<0) /* set when device opened */
98 #define ST_TAPE (1<<1) /* is a tape device */
99 #define ST_FILE (1<<2) /* is a file device */
100 #define ST_FIFO (1<<3) /* is a fifo device */
101 #define ST_DVD (1<<4) /* is a DVD device */
102 #define ST_PROG (1<<5) /* is a program device */
103 #define ST_LABEL (1<<6) /* label found */
104 #define ST_MALLOC (1<<7) /* dev packet malloc'ed in init_dev() */
105 #define ST_APPEND (1<<8) /* ready for Bacula append */
106 #define ST_READ (1<<9) /* ready for Bacula read */
107 #define ST_EOT (1<<10) /* at end of tape */
108 #define ST_WEOT (1<<11) /* Got EOT on write */
109 #define ST_EOF (1<<12) /* Read EOF i.e. zero bytes */
110 #define ST_NEXTVOL (1<<13) /* Start writing on next volume */
111 #define ST_SHORT (1<<14) /* Short block read */
112 #define ST_MOUNTED (1<<15) /* the device is mounted to the mount point */
113 #define ST_MEDIA (1<<16) /* Media found in mounted device */
114 #define ST_OFFLINE (1<<17) /* set offline by operator */
115 #define ST_PART_SPOOLED (1<<18) /* spooling part */
117 /* dev_blocked states (mutually exclusive) */
119 BST_NOT_BLOCKED = 0, /* not blocked */
120 BST_UNMOUNTED, /* User unmounted device */
121 BST_WAITING_FOR_SYSOP, /* Waiting for operator to mount tape */
122 BST_DOING_ACQUIRE, /* Opening/validating/moving tape */
123 BST_WRITING_LABEL, /* Labeling a tape */
124 BST_UNMOUNTED_WAITING_FOR_SYSOP, /* Closed by user during mount request */
125 BST_MOUNT /* Mount request */
128 /* Volume Catalog Information structure definition */
129 struct VOLUME_CAT_INFO {
130 /* Media info for the current Volume */
131 uint32_t VolCatJobs; /* number of jobs on this Volume */
132 uint32_t VolCatFiles; /* Number of files */
133 uint32_t VolCatBlocks; /* Number of blocks */
134 uint64_t VolCatBytes; /* Number of bytes written */
135 uint32_t VolCatParts; /* Number of parts written */
136 uint32_t VolCatMounts; /* Number of mounts this volume */
137 uint32_t VolCatErrors; /* Number of errors this volume */
138 uint32_t VolCatWrites; /* Number of writes this volume */
139 uint32_t VolCatReads; /* Number of reads this volume */
140 uint64_t VolCatRBytes; /* Number of bytes read */
141 uint32_t VolCatRecycles; /* Number of recycles this volume */
142 uint32_t EndFile; /* Last file number */
143 uint32_t EndBlock; /* Last block number */
144 int32_t LabelType; /* Bacula/ANSI/IBM */
145 int32_t Slot; /* Slot in changer */
146 bool InChanger; /* Set if vol in current magazine */
147 uint32_t VolCatMaxJobs; /* Maximum Jobs to write to volume */
148 uint32_t VolCatMaxFiles; /* Maximum files to write to volume */
149 uint64_t VolCatMaxBytes; /* Max bytes to write to volume */
150 uint64_t VolCatCapacityBytes; /* capacity estimate */
151 uint64_t VolReadTime; /* time spent reading */
152 uint64_t VolWriteTime; /* time spent writing this Volume */
153 char VolCatStatus[20]; /* Volume status */
154 char VolCatName[MAX_NAME_LENGTH]; /* Desired volume to mount */
158 typedef struct s_steal_lock {
159 pthread_t no_wait_id; /* id of no wait thread */
160 int dev_blocked; /* state */
161 int dev_prev_blocked; /* previous blocked state */
164 struct DEVRES; /* Device resource defined in stored_conf.h */
165 int weof_dev(DEVICE *dev, int num);
166 bool rewind_dev(DEVICE *dev);
168 class DCR; /* forward reference */
170 * Device structure definition. There is one of these for
171 * each physical device. Everything here is "global" to
172 * that device and effects all jobs using the device.
176 dlist *attached_dcrs; /* attached DCR list */
177 pthread_mutex_t mutex; /* access control */
178 pthread_mutex_t spool_mutex; /* mutex for updating spool_size */
179 pthread_cond_t wait; /* thread wait variable */
180 pthread_cond_t wait_next_vol; /* wait for tape to be mounted */
181 pthread_t no_wait_id; /* this thread must not wait */
182 int dev_blocked; /* set if we must wait (i.e. change tape) */
183 int dev_prev_blocked; /* previous blocked state */
184 int num_waiting; /* number of threads waiting */
185 int num_writers; /* number of writing threads */
186 int reserved_device; /* number of device reservations */
188 /* New access control in process of being implemented */
189 brwlock_t lock; /* New mutual exclusion lock */
191 int use_count; /* usage count on this device 0 or 1 */
192 int fd; /* file descriptor */
193 int capabilities; /* capabilities mask */
194 int state; /* state mask */
195 int dev_errno; /* Our own errno */
196 int mode; /* read/write modes */
197 int openmode; /* parameter passed to open_dev (useful to reopen the device) */
198 bool autoselect; /* Autoselect in autochanger */
199 bool open_nowait; /* If set, don t wait on open */
200 int label_type; /* Bacula/ANSI/IBM label types */
201 uint32_t drive_index; /* Autochanger drive index (base 0) */
202 int32_t Slot; /* Slot currently in drive (base 1) */
203 POOLMEM *dev_name; /* Physical device name */
204 POOLMEM *prt_name; /* Name used for display purposes */
205 char *errmsg; /* nicely edited error message */
206 uint32_t block_num; /* current block number base 0 */
207 uint32_t file; /* current file number base 0 */
208 uint64_t file_addr; /* Current file read/write address */
209 uint64_t file_size; /* Current file size */
210 uint32_t EndBlock; /* last block written */
211 uint32_t EndFile; /* last file written */
212 uint32_t min_block_size; /* min block size */
213 uint32_t max_block_size; /* max block size */
214 uint64_t max_volume_size; /* max bytes to put on one volume */
215 uint64_t max_file_size; /* max file size to put in one file on volume */
216 uint64_t volume_capacity; /* advisory capacity */
217 uint64_t max_spool_size; /* maximum spool file size */
218 uint64_t spool_size; /* current spool size for this device */
219 uint32_t max_rewind_wait; /* max secs to allow for rewind */
220 uint32_t max_open_wait; /* max secs to allow for open */
221 uint32_t max_open_vols; /* max simultaneous open volumes */
223 uint64_t max_part_size; /* max part size */
224 uint64_t part_size; /* current part size */
225 uint32_t part; /* current part number (starts at 0) */
226 uint64_t part_start; /* current part start address (relative to the whole volume) */
227 uint32_t num_parts; /* number of parts WRITTEN on the DVD */
228 uint64_t free_space; /* current free space on medium (without the current part) */
229 int free_space_errno; /* indicates:
230 * - free_space_errno == 0: ignore free_space.
231 * - free_space_errno < 0: an error occured.
232 * - free_space_errno > 0: free_space is valid. */
234 utime_t vol_poll_interval; /* interval between polling Vol mount */
235 DEVRES *device; /* pointer to Device Resource */
236 btimer_t *tid; /* timer id */
238 VOLUME_CAT_INFO VolCatInfo; /* Volume Catalog Information */
239 VOLUME_LABEL VolHdr; /* Actual volume label */
240 char pool_name[MAX_NAME_LENGTH]; /* pool name */
241 char pool_type[MAX_NAME_LENGTH]; /* pool type */
243 /* Device wait times ***FIXME*** look at durations */
244 char BadVolName[MAX_NAME_LENGTH]; /* Last wrong Volume mounted */
245 bool poll; /* set to poll Volume */
254 int is_autochanger() const { return capabilities & CAP_AUTOCHANGER; }
255 int requires_mount() const { return capabilities & CAP_REQMOUNT; }
256 int is_tape() const { return state & ST_TAPE; }
257 int is_file() const { return state & ST_FILE; }
258 int is_fifo() const { return state & ST_FIFO; }
259 int is_dvd() const { return state & ST_DVD; }
260 int is_open() const { return state & ST_OPENED; }
261 int is_offline() const { return state & ST_OFFLINE; }
262 int is_labeled() const { return state & ST_LABEL; }
263 int is_mounted() const { return state & ST_MOUNTED; }
264 int is_part_spooled() const { return state & ST_PART_SPOOLED; }
265 int have_media() const { return state & ST_MEDIA; }
266 int is_short_block() const { return state & ST_SHORT; }
267 int is_busy() const { return (state & ST_READ) || num_writers || reserved_device; }
268 int at_eof() const { return state & ST_EOF; }
269 int at_eot() const { return state & ST_EOT; }
270 int at_weot() const { return state & ST_WEOT; }
271 int can_append() const { return state & ST_APPEND; }
273 * can_write() is meant for checking at the end of a job to see
274 * if we still have a tape (perhaps not if at end of tape
275 * and the job is canceled).
277 int can_write() const { return is_open() && can_append() &&
278 is_labeled() && !at_weot(); }
279 int can_read() const { return state & ST_READ; }
280 bool can_steal_lock() const { return dev_blocked &&
281 (dev_blocked == BST_UNMOUNTED ||
282 dev_blocked == BST_WAITING_FOR_SYSOP ||
283 dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
284 bool waiting_for_mount() const { return
285 (dev_blocked == BST_UNMOUNTED ||
286 dev_blocked == BST_WAITING_FOR_SYSOP ||
287 dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
288 bool weof() { return !weof_dev(this, 1); };
289 bool fsr(int num); /* in dev.c */
290 bool fsf(int num); /* in dev.c */
291 bool rewind() { return rewind_dev(this); };
292 const char *strerror() const;
293 const char *archive_name() const;
294 const char *name() const;
295 const char *print_name() const; /* Name for display purposes */
296 void set_ateof(); /* in dev.c */
297 void set_ateot(); /* in dev.c */
298 void set_eot() { state |= ST_EOT; };
299 void set_eof() { state |= ST_EOF; };
300 void set_append() { state |= ST_APPEND; };
301 void set_labeled() { state |= ST_LABEL; };
302 void set_read() { state |= ST_READ; };
303 void set_offline() { state |= ST_OFFLINE; };
304 void set_opened() { state |= ST_OPENED; };
305 void set_mounted() { state |= ST_MOUNTED; };
306 void set_media() { state |= ST_MEDIA; };
307 void set_short_block() { state |= ST_SHORT; };
308 void set_part_spooled(int val) { if (val) state |= ST_PART_SPOOLED; \
309 else state &= ~ST_PART_SPOOLED; };
310 void set_mounted(int val) { if (val) state |= ST_MOUNTED; \
311 else state &= ~ST_MOUNTED; };
312 void clear_append() { state &= ~ST_APPEND; };
313 void clear_read() { state &= ~ST_READ; };
314 void clear_labeled() { state &= ~ST_LABEL; };
315 void clear_offline() { state &= ~ST_OFFLINE; };
316 void clear_eot() { state &= ~ST_EOT; };
317 void clear_eof() { state &= ~ST_EOF; };
318 void clear_opened() { state &= ~ST_OPENED; };
319 void clear_mounted() { state &= ~ST_MOUNTED; };
320 void clear_media() { state &= ~ST_MEDIA; };
321 void clear_short_block() { state &= ~ST_SHORT; };
323 void block(int why); /* in dev.c */
324 void unblock(); /* in dev.c */
325 void close(); /* in dev.c */
326 int open(DCR *dcr, int mode); /* in dev.c */
329 void set_blocked(int block) { dev_blocked = block; };
330 int get_blocked() const { return dev_blocked; };
331 const char *print_blocked() const; /* in dev.c */
332 bool is_blocked() const { return dev_blocked != BST_NOT_BLOCKED; };
335 void set_mode(int omode); /* in dev.c */
336 void open_tape_device(int omode); /* in dev.c */
337 void open_file_device(int omode); /* in dev.c */
338 void open_dvd_device(DCR *dcr, int omode); /* in dev.c */
342 /* Note, these return int not bool! */
343 inline const char *DEVICE::strerror() const { return errmsg; }
344 inline const char *DEVICE::archive_name() const { return dev_name; }
345 inline const char *DEVICE::print_name() const { return prt_name; }
348 * Device Context (or Control) Record.
349 * There is one of these records for each Job that is using
350 * the device. Items in this record are "local" to the Job and
351 * do not affect other Jobs. Note, a job can have multiple
352 * DCRs open, each pointing to a different device.
356 dlink dev_link; /* link to attach to dev */
357 JCR *jcr; /* pointer to JCR */
358 DEVICE *dev; /* pointer to device */
359 DEVRES *device; /* pointer to device resource */
360 DEV_BLOCK *block; /* pointer to block */
361 DEV_RECORD *rec; /* pointer to record */
362 int spool_fd; /* fd if spooling */
363 bool spool_data; /* set to spool data */
364 bool spooling; /* set when actually spooling */
365 bool dev_locked; /* set if dev already locked */
366 bool NewVol; /* set if new Volume mounted */
367 bool WroteVol; /* set if Volume written */
368 bool NewFile; /* set when EOF written */
369 bool reserved_device; /* set if reserve done */
370 uint32_t VolFirstIndex; /* First file index this Volume */
371 uint32_t VolLastIndex; /* Last file index this Volume */
372 uint32_t FileIndex; /* Current File Index */
373 uint32_t EndFile; /* End file written */
374 uint32_t StartFile; /* Start write file */
375 uint32_t StartBlock; /* Start write block */
376 uint32_t EndBlock; /* Ending block written */
377 int64_t job_spool_size; /* Current job spool size */
378 int64_t max_job_spool_size; /* Max job spool size */
379 char VolumeName[MAX_NAME_LENGTH]; /* Volume name */
380 char pool_name[MAX_NAME_LENGTH]; /* pool name */
381 char pool_type[MAX_NAME_LENGTH]; /* pool type */
382 char media_type[MAX_NAME_LENGTH]; /* media type */
383 char dev_name[MAX_NAME_LENGTH]; /* dev name */
384 int Copy; /* identical copy number */
385 int Stripe; /* RAIT stripe */
386 VOLUME_CAT_INFO VolCatInfo; /* Catalog info for desired volume */
390 * Volume reservation class -- see reserve.c
401 /* Get some definition of function to position
402 * to the end of the medium in MTEOM. System
403 * dependent. Arrgggg!