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 /* Arguments to open_dev() */
36 /* Generic status bits returned from status_dev() */
37 #define MT_TAPE (1<<0) /* is tape device */
38 #define MT_EOF (1<<1) /* just read EOF */
39 #define MT_BOT (1<<2) /* at beginning of tape */
40 #define MT_EOT (1<<3) /* end of tape reached */
41 #define MT_SM (1<<4) /* DDS setmark */
42 #define MT_EOD (1<<5) /* DDS at end of data */
43 #define MT_WR_PROT (1<<6) /* tape write protected */
44 #define MT_ONLINE (1<<7) /* tape online */
45 #define MT_DR_OPEN (1<<8) /* tape door open */
46 #define MT_IM_REP_EN (1<<9) /* immediate report enabled */
49 /* Bits for device capabilities */
50 #define CAP_EOF 0x001 /* has MTWEOF */
51 #define CAP_BSR 0x002 /* has MTBSR */
52 #define CAP_BSF 0x004 /* has MTBSF */
53 #define CAP_FSR 0x008 /* has MTFSR */
54 #define CAP_FSF 0x010 /* has MTFSF */
55 #define CAP_EOM 0x020 /* has MTEOM */
56 #define CAP_REM 0x040 /* is removable media */
57 #define CAP_RACCESS 0x080 /* is random access device */
58 #define CAP_AUTOMOUNT 0x100 /* Read device at start to see what is there */
59 #define CAP_LABEL 0x200 /* Label blank tapes */
60 #define CAP_ANONVOLS 0x400 /* Mount without knowing volume name */
61 #define CAP_ALWAYSOPEN 0x800 /* always keep device open */
65 #define ST_OPENED 0x001 /* set when device opened */
66 #define ST_TAPE 0x002 /* is a tape device */
67 #define ST_LABEL 0x004 /* label found */
68 #define ST_MALLOC 0x008 /* dev packet malloc'ed in init_dev() */
69 #define ST_APPEND 0x010 /* ready for Bacula append */
70 #define ST_READ 0x020 /* ready for Bacula read */
71 #define ST_EOT 0x040 /* at end of tape */
72 #define ST_WEOT 0x080 /* Got EOT on write */
73 #define ST_EOF 0x100 /* Read EOF i.e. zero bytes */
74 #define ST_NEXTVOL 0x200 /* Start writing on next volume */
75 #define ST_SHORT 0x400 /* Short block read */
77 /* dev_blocked states (mutually exclusive) */
78 #define BST_NOT_BLOCKED 0 /* not blocked */
79 #define BST_UNMOUNTED 1 /* User unmounted device */
80 #define BST_WAITING_FOR_SYSOP 2 /* Waiting for operator to mount tape */
81 #define BST_DOING_ACQUIRE 3 /* Opening/validating/moving tape */
82 #define BST_WRITING_LABEL 4 /* Labeling a tape */
83 #define BST_UNMOUNTED_WAITING_FOR_SYSOP 5 /* Closed by user during mount request */
85 /* Volume Catalog Information structure definition */
86 typedef struct s_volume_catalog_info {
87 /* Media info for the current Volume */
88 uint32_t VolCatJobs; /* number of jobs on this Volume */
89 uint32_t VolCatFiles; /* Number of files */
90 uint32_t VolCatBlocks; /* Number of blocks */
91 uint64_t VolCatBytes; /* Number of bytes written */
92 uint32_t VolCatMounts; /* Number of mounts this volume */
93 uint32_t VolCatErrors; /* Number of errors this volume */
94 uint32_t VolCatWrites; /* Number of writes this volume */
95 uint32_t VolCatReads; /* Number of reads this volume */
96 uint32_t VolCatRecycles; /* Number of recycles this volume */
97 uint64_t VolCatMaxBytes; /* max bytes to write */
98 uint64_t VolCatCapacityBytes; /* capacity estimate */
99 char VolCatStatus[20]; /* Volume status */
100 char VolCatName[MAX_NAME_LENGTH]; /* Desired volume to mount */
104 /* Device structure definition */
105 typedef struct s_device {
106 struct s_device *next; /* pointer to next open device */
107 pthread_mutex_t mutex; /* access control */
108 pthread_cond_t wait; /* thread wait variable */
109 pthread_cond_t wait_next_vol; /* wait for tape to be mounted */
110 pthread_t no_wait_id; /* this thread must not wait */
111 int dev_blocked; /* set if we must wait (i.e. change tape) */
112 int num_waiting; /* number of threads waiting */
113 int num_writers; /* number of writing threads */
114 int use_count; /* usage count on this device */
115 int fd; /* file descriptor */
116 int capabilities; /* capabilities mask */
117 int state; /* state mask */
118 int dev_errno; /* Our own errno */
119 int mode; /* read/write modes */
120 char *dev_name; /* device name */
121 char *errmsg; /* nicely edited error message */
122 uint32_t block_num; /* current block number base 0 */
123 uint32_t file; /* current file number base 0 */
124 uint32_t file_bytes; /* bytes in this file */
125 uint32_t LastBlockNumWritten; /* last block written */
126 uint32_t min_block_size; /* min block size */
127 uint32_t max_block_size; /* max block size */
128 uint32_t max_volume_jobs; /* max jobs to put on one volume */
129 uint64_t max_volume_files; /* max files to put on one volume */
130 uint64_t max_volume_size; /* max bytes to put on one volume */
131 uint64_t max_file_size; /* max file size to put in one file on volume */
132 uint64_t volume_capacity; /* advisory capacity */
133 uint32_t max_rewind_wait; /* max secs to allow for rewind */
134 void *device; /* pointer to Device Resource */
136 VOLUME_CAT_INFO VolCatInfo; /* Volume Catalog Information */
137 VOLUME_LABEL VolHdr; /* Actual volume label */
145 #define DEFAULT_TAPE_DRIVE "/dev/rmt/0cbn"
148 #define DEFAULT_TAPE_DRIVE "/dev/rmt0.1"
151 #define DEFAULT_TAPE_DRIVE "/dev/tps0d4nr"
154 #define DEFAULT_TAPE_DRIVE "/dev/nst0"
157 #define DEFAULT_TAPE_DRIVE "/dev/nrmt0"
160 #define DEFAULT_TAPE_DRIVE "/dev/rmt/0hnb"
163 #define DEFAULT_TAPE_DRIVE "/dev/nrst0"
166 /* Default default */
167 #ifndef DEFAULT_TAPE_DRIVE
168 #define DEFAULT_TAPE_DRIVE "/dev/nst0"
171 /* Get some definition of function to position
172 * to the end of the medium in MTEOM. System
173 * dependent. Arrgggg!