2 * Definitions for using the Device functions in Bacula
3 * Tape and File storage access
9 Copyright (C) 2000, 2001, 2002 Kern Sibbald and John Walker
11 This program is free software; you can redistribute it and/or
12 modify it under the terms of the GNU General Public License as
13 published by the Free Software Foundation; either version 2 of
14 the License, or (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU General Public
22 License along with this program; if not, write to the Free
23 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
32 /* #define NEW_LOCK 1 */
34 #define new_lock_device(dev) _new_lock_device(__FILE__, __LINE__, (dev))
35 #define new_lock_device_state(dev,state) _new_lock_device(__FILE__, __LINE__, (dev), (state))
36 #define new_unlock_device(dev) _new_unlock_device(__FILE__, __LINE__, (dev))
38 #define lock_device(d) _lock_device(__FILE__, __LINE__, (d))
39 #define unlock_device(d) _unlock_device(__FILE__, __LINE__, (d))
40 #define block_device(d, s) _block_device(__FILE__, __LINE__, (d), s)
41 #define unblock_device(d) _unblock_device(__FILE__, __LINE__, (d))
42 #define steal_device_lock(d, p, s) _steal_device_lock(__FILE__, __LINE__, (d), (p), s)
43 #define return_device_lock(d, p) _return_device_lock(__FILE__, __LINE__, (d), (p))
45 /* Arguments to open_dev() */
49 /* Generic status bits returned from status_dev() */
50 #define MT_TAPE (1<<0) /* is tape device */
51 #define MT_EOF (1<<1) /* just read EOF */
52 #define MT_BOT (1<<2) /* at beginning of tape */
53 #define MT_EOT (1<<3) /* end of tape reached */
54 #define MT_SM (1<<4) /* DDS setmark */
55 #define MT_EOD (1<<5) /* DDS at end of data */
56 #define MT_WR_PROT (1<<6) /* tape write protected */
57 #define MT_ONLINE (1<<7) /* tape online */
58 #define MT_DR_OPEN (1<<8) /* tape door open */
59 #define MT_IM_REP_EN (1<<9) /* immediate report enabled */
62 /* Bits for device capabilities */
63 #define CAP_EOF 0x0001 /* has MTWEOF */
64 #define CAP_BSR 0x0002 /* has MTBSR */
65 #define CAP_BSF 0x0004 /* has MTBSF */
66 #define CAP_FSR 0x0008 /* has MTFSR */
67 #define CAP_FSF 0x0010 /* has MTFSF */
68 #define CAP_EOM 0x0020 /* has MTEOM */
69 #define CAP_REM 0x0040 /* is removable media */
70 #define CAP_RACCESS 0x0080 /* is random access device */
71 #define CAP_AUTOMOUNT 0x0100 /* Read device at start to see what is there */
72 #define CAP_LABEL 0x0200 /* Label blank tapes */
73 #define CAP_ANONVOLS 0x0400 /* Mount without knowing volume name */
74 #define CAP_ALWAYSOPEN 0x0800 /* always keep device open */
75 #define CAP_AUTOCHANGER 0x1000 /* AutoChanger */
76 #define CAP_OFFLINEUNMOUNT 0x2000 /* Offline before unmount */
80 #define ST_OPENED 0x001 /* set when device opened */
81 #define ST_TAPE 0x002 /* is a tape device */
82 #define ST_LABEL 0x004 /* label found */
83 #define ST_MALLOC 0x008 /* dev packet malloc'ed in init_dev() */
84 #define ST_APPEND 0x010 /* ready for Bacula append */
85 #define ST_READ 0x020 /* ready for Bacula read */
86 #define ST_EOT 0x040 /* at end of tape */
87 #define ST_WEOT 0x080 /* Got EOT on write */
88 #define ST_EOF 0x100 /* Read EOF i.e. zero bytes */
89 #define ST_NEXTVOL 0x200 /* Start writing on next volume */
90 #define ST_SHORT 0x400 /* Short block read */
92 /* dev_blocked states (mutually exclusive) */
93 #define BST_NOT_BLOCKED 0 /* not blocked */
94 #define BST_UNMOUNTED 1 /* User unmounted device */
95 #define BST_WAITING_FOR_SYSOP 2 /* Waiting for operator to mount tape */
96 #define BST_DOING_ACQUIRE 3 /* Opening/validating/moving tape */
97 #define BST_WRITING_LABEL 4 /* Labeling a tape */
98 #define BST_UNMOUNTED_WAITING_FOR_SYSOP 5 /* Closed by user during mount request */
100 /* Volume Catalog Information structure definition */
101 typedef struct s_volume_catalog_info {
102 /* Media info for the current Volume */
103 uint32_t VolCatJobs; /* number of jobs on this Volume */
104 uint32_t VolCatFiles; /* Number of files */
105 uint32_t VolCatBlocks; /* Number of blocks */
106 uint64_t VolCatBytes; /* Number of bytes written */
107 uint32_t VolCatMounts; /* Number of mounts this volume */
108 uint32_t VolCatErrors; /* Number of errors this volume */
109 uint32_t VolCatWrites; /* Number of writes this volume */
110 uint32_t VolCatReads; /* Number of reads this volume */
111 uint32_t VolCatRecycles; /* Number of recycles this volume */
112 int32_t Slot; /* Slot in changer */
113 uint32_t VolCatMaxJobs; /* Maximum Jobs to write to volume */
114 uint32_t VolCatMaxFiles; /* Maximum files to write to volume */
115 uint64_t VolCatMaxBytes; /* Max bytes to write to volume */
116 uint64_t VolCatCapacityBytes; /* capacity estimate */
117 char VolCatStatus[20]; /* Volume status */
118 char VolCatName[MAX_NAME_LENGTH]; /* Desired volume to mount */
122 typedef struct s_steal_lock {
123 pthread_t no_wait_id; /* id of no wait thread */
124 int dev_blocked; /* state */
128 /* Device structure definition */
129 typedef struct s_device {
130 struct s_device *next; /* pointer to next open device */
131 void *attached_jcrs; /* attached JCR list */
133 brwlock_t lock; /* new device locking mechanism */
135 pthread_mutex_t mutex; /* access control */
136 pthread_cond_t wait; /* thread wait variable */
137 pthread_cond_t wait_next_vol; /* wait for tape to be mounted */
138 pthread_t no_wait_id; /* this thread must not wait */
139 int dev_blocked; /* set if we must wait (i.e. change tape) */
140 int num_waiting; /* number of threads waiting */
141 int num_writers; /* number of writing threads */
142 int use_count; /* usage count on this device */
143 int fd; /* file descriptor */
144 int capabilities; /* capabilities mask */
145 int state; /* state mask */
146 int dev_errno; /* Our own errno */
147 int mode; /* read/write modes */
148 char *dev_name; /* device name */
149 char *errmsg; /* nicely edited error message */
150 uint32_t block_num; /* current block number base 0 */
151 uint32_t file; /* current file number base 0 */
152 uint64_t file_addr; /* Current file read/write address */
153 uint32_t EndBlock; /* last block written */
154 uint32_t EndFile; /* last file written */
155 uint32_t min_block_size; /* min block size */
156 uint32_t max_block_size; /* max block size */
157 uint32_t max_volume_jobs; /* max jobs to put on one volume */
158 uint64_t max_volume_files; /* max files to put on one volume */
159 uint64_t max_volume_size; /* max bytes to put on one volume */
160 uint64_t max_file_size; /* max file size to put in one file on volume */
161 uint64_t volume_capacity; /* advisory capacity */
162 uint32_t max_rewind_wait; /* max secs to allow for rewind */
163 uint32_t max_open_wait; /* max secs to allow for open */
164 void *device; /* pointer to Device Resource */
166 VOLUME_CAT_INFO VolCatInfo; /* Volume Catalog Information */
167 VOLUME_LABEL VolHdr; /* Actual volume label */
175 #define DEFAULT_TAPE_DRIVE "/dev/rmt/0cbn"
178 #define DEFAULT_TAPE_DRIVE "/dev/rmt0.1"
181 #define DEFAULT_TAPE_DRIVE "/dev/tps0d4nr"
184 #define DEFAULT_TAPE_DRIVE "/dev/nst0"
187 #define DEFAULT_TAPE_DRIVE "/dev/nrmt0"
190 #define DEFAULT_TAPE_DRIVE "/dev/rmt/0hnb"
193 #define DEFAULT_TAPE_DRIVE "/dev/nrst0"
196 /* Default default */
197 #ifndef DEFAULT_TAPE_DRIVE
198 #define DEFAULT_TAPE_DRIVE "/dev/nst0"
201 /* Get some definition of function to position
202 * to the end of the medium in MTEOM. System
203 * dependent. Arrgggg!