*
*/
+/*
+ * Some details of how volume and device reservations work
+ *
+ * class VOLRES:
+ * set_in_use() volume being used on current drive
+ * clear_in_use() no longer being used. Can be re-used or moved.
+ * set_swapping() set volume being moved to another drive
+ * is_swapping() volume is being moved to another drive
+ * clear_swapping() volume normal
+ *
+ * class DEVICE:
+ * set_load() set to load volume
+ * needs_load() volume must be loaded (i.e. set_load done)
+ * clear_load() load done.
+ * set_unload() set to unload volume
+ * needs_unload() volume must be unloaded
+ * clear_unload() volume unloaded
+ *
+ * reservations are temporary until the drive is acquired
+ * inc_reserved() increments num of reservations
+ * dec_reserved() decrements num of reservations
+ * num_reserved() number of reservations
+ *
+ * class DCR:
+ * set_reserved() sets local reserve flag and calls dev->inc_reserved()
+ * clear_reserved() clears local reserve flag and calls dev->dec_reserved()
+ * is_reserved() returns local reserved flag
+ * unreserve_device() much more complete unreservation
+ *
+ */
+
#ifndef __DEV_H
#define __DEV_H 1
B_TAPE_DEV,
B_DVD_DEV,
B_FIFO_DEV,
- B_VTL_DEV
+ B_VTAPE_DEV, /* change to B_TAPE_DEV after init */
+ B_VTL_DEV
};
/* Generic status bits returned from status_dev() */
class DEVRES; /* Device resource defined in stored_conf.h */
-
class DCR; /* forward reference */
class VOLRES; /* forward reference */
-
/*
* Device structure definition. There is one of these for
* each physical device. Everything here is "global" to
int m_blocked; /* set if we must wait (i.e. change tape) */
int m_count; /* Mutex use count -- DEBUG only */
pthread_t m_pid; /* Thread that locked -- DEBUG only */
+ bool m_unload; /* set when Volume must be unloaded */
+ bool m_load; /* set when Volume must be loaded */
+ int m_num_reserved; /* counter of device reservations */
+ int32_t m_slot; /* slot loaded in drive or -1 if none */
+
public:
+ DEVICE * volatile swap_dev; /* Swap vol from this device */
dlist *attached_dcrs; /* attached DCR list */
pthread_mutex_t m_mutex; /* access control */
pthread_mutex_t spool_mutex; /* mutex for updating spool_size */
int dev_prev_blocked; /* previous blocked state */
int num_waiting; /* number of threads waiting */
int num_writers; /* number of writing threads */
- int reserved_device; /* number of device reservations */
int capabilities; /* capabilities mask */
int state; /* state mask */
int dev_errno; /* Our own errno */
bool initiated; /* set when init_dev() called */
int label_type; /* Bacula/ANSI/IBM label types */
uint32_t drive_index; /* Autochanger drive index (base 0) */
- int32_t Slot; /* Slot currently in drive (base 1) */
POOLMEM *dev_name; /* Physical device name */
POOLMEM *prt_name; /* Name used for display purposes */
char *errmsg; /* nicely edited error message */
uint32_t block_num; /* current block number base 0 */
+ uint32_t LastBlock; /* last DEV_BLOCK number written to Volume */
uint32_t file; /* current file number base 0 */
uint64_t file_addr; /* Current file read/write address */
uint64_t file_size; /* Current file size */
int is_autochanger() const { return capabilities & CAP_AUTOCHANGER; }
int requires_mount() const { return capabilities & CAP_REQMOUNT; }
int is_removable() const { return capabilities & CAP_REM; }
- int is_tape() const { return dev_type == B_TAPE_DEV; }
+ int is_tape() const { return (dev_type == B_TAPE_DEV ||
+ dev_type == B_VTAPE_DEV); }
int is_file() const { return dev_type == B_FILE_DEV; }
int is_fifo() const { return dev_type == B_FIFO_DEV; }
int is_dvd() const { return dev_type == B_DVD_DEV; }
int is_vtl() const { return dev_type == B_VTL_DEV; }
+ int is_vtape() const { return dev_type == B_VTAPE_DEV; }
int is_open() const { return m_fd >= 0; }
int is_offline() const { return state & ST_OFFLINE; }
int is_labeled() const { return state & ST_LABEL; }
int is_mounted() const { return state & ST_MOUNTED; }
int is_unmountable() const { return (is_dvd() || (is_file() && is_removable())); }
+ int num_reserved() const { return m_num_reserved; };
int is_part_spooled() const { return state & ST_PART_SPOOLED; }
int have_media() const { return state & ST_MEDIA; }
int is_short_block() const { return state & ST_SHORT; }
- int is_busy() const { return (state & ST_READ) || num_writers || reserved_device; }
+ int is_busy() const { return (state & ST_READ) || num_writers || num_reserved(); }
int at_eof() const { return state & ST_EOF; }
int at_eot() const { return state & ST_EOT; }
int at_weot() const { return state & ST_WEOT; }
(m_blocked == BST_UNMOUNTED ||
m_blocked == BST_WAITING_FOR_SYSOP ||
m_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP); };
+ bool must_unload() const { return m_unload; };
+ bool must_load() const { return m_load; };
const char *strerror() const;
const char *archive_name() const;
const char *name() const;
void set_part_spooled(int val) { if (val) state |= ST_PART_SPOOLED; \
else state &= ~ST_PART_SPOOLED;
};
+ void set_unload() { m_unload = true; };
+ void set_load() { m_load = true; };
+ void inc_reserved() { m_num_reserved++; }
void set_mounted(int val) { if (val) state |= ST_MOUNTED; \
else state &= ~ST_MOUNTED; };
+ void dec_reserved() { m_num_reserved--; ASSERT(m_num_reserved>=0); };
void clear_append() { state &= ~ST_APPEND; };
void clear_read() { state &= ~ST_READ; };
void clear_labeled() { state &= ~ST_LABEL; };
void clear_media() { state &= ~ST_MEDIA; };
void clear_short_block() { state &= ~ST_SHORT; };
void clear_freespace_ok() { state &= ~ST_FREESPACE_OK; };
+ void clear_unload() { m_unload = false; };
+ void clear_load() { m_load = false; };
char *bstrerror(void) { return errmsg; };
char *print_errmsg() { return errmsg; };
+ int32_t get_slot() const { return m_slot; };
void clear_volhdr(); /* in dev.c */
void clrerror(int func); /* in dev.c */
boffset_t lseek(DCR *dcr, boffset_t offset, int whence); /* in dev.c */
bool update_pos(DCR *dcr); /* in dev.c */
+ void set_slot(int32_t slot); /* in dev.c */
+ void clear_slot(); /* in dev.c */
+
+
bool update_freespace(); /* in dvd.c */
uint32_t get_file() const { return file; };
uint32_t get_block_num() const { return block_num; };
int fd() const { return m_fd; };
+ /* low level operations */
+ void init_backend();
+ int (*d_open)(const char *pathname, int flags, ...);
+ int (*d_close)(int fd);
+ int (*d_ioctl)(int fd, unsigned long int request, ...);
+ ssize_t (*d_read)(int fd, void *buffer, size_t count);
+ ssize_t (*d_write)(int fd, const void *buffer, size_t count);
+
/*
* Locking and blocking calls
*/
class DCR {
private:
bool m_dev_locked; /* set if dev already locked */
+ bool m_reserved; /* set if reserved device */
+ bool m_found_in_use; /* set if a volume found in use */
public:
dlink dev_link; /* link to attach to dev */
JCR *jcr; /* pointer to JCR */
DEVICE * volatile dev; /* pointer to device */
- DEVICE * volatile swap_dev; /* Swap vol from this device */
DEVRES *device; /* pointer to device resource */
DEV_BLOCK *block; /* pointer to block */
DEV_RECORD *rec; /* pointer to record */
bool NewVol; /* set if new Volume mounted */
bool WroteVol; /* set if Volume written */
bool NewFile; /* set when EOF written */
- bool reserved_device; /* set if reserve done */
bool reserved_volume; /* set if we reserved a volume */
bool any_volume; /* Any OK for dir_find_next... */
bool attached_to_dev; /* set when attached to dev */
- bool volume_in_use; /* set in dir_find_next_appendable_volume() */
bool keep_dcr; /* do not free dcr in release_dcr */
- bool unload_device; /* set if device must be unloaded */
uint32_t VolFirstIndex; /* First file index this Volume */
uint32_t VolLastIndex; /* Last file index this Volume */
uint32_t FileIndex; /* Current File Index */
VOLUME_CAT_INFO VolCatInfo; /* Catalog info for desired volume */
/* Methods */
+ bool found_in_use() const { return m_found_in_use; };
+ void set_found_in_use() { m_found_in_use = true; };
+ void clear_found_in_use() { m_found_in_use = false; };
+ bool is_reserved() const { return m_reserved; };
bool is_dev_locked() { return m_dev_locked; }
void dlock() { dev->dlock(); m_dev_locked = true; }
void dunlock() { m_dev_locked = false; dev->dunlock(); }
void dblock(int why) { dev->dblock(why); }
+
+ /* Methods in reserve.c */
+ void clear_reserved();
+ void set_reserved();
+ void unreserve_device();
+ bool can_i_use_volume();
+
/* Methods in mount.c */
bool mount_next_write_volume();
+ bool mount_next_read_volume();
void mark_volume_in_error();
void mark_volume_not_inchanger();
int try_autolabel(bool opened);
+ bool find_a_volume();
bool is_suitable_volume_mounted();
bool is_eod_valid();
int check_volume_label(bool &ask, bool &autochanger);
+ void release_volume();
+ void do_swapping(bool is_writing);
+ bool is_tape_position_ok();
};
/*
*/
class VOLRES {
bool m_swapping; /* set when swapping to another drive */
- bool m_reserved; /* set when volume reserved */
+ bool m_in_use; /* set when volume reserved or in use */
+ int32_t m_slot; /* slot of swapping volume */
public:
dlink link;
char *vol_name; /* Volume name */
bool is_swapping() const { return m_swapping; };
void set_swapping() { m_swapping = true; };
void clear_swapping() { m_swapping = false; };
- bool is_reserved() const { return m_reserved; };
- void set_reserved() { m_reserved = true; };
- void clear_reserved() { m_reserved = false; };
+ bool is_in_use() const { return m_in_use; };
+ void set_in_use() { m_in_use = true; };
+ void clear_in_use() { m_in_use = false; };
+ void set_slot(int32_t slot) { m_slot = slot; };
+ void clear_slot() { m_slot = -1; };
+ int32_t get_slot() const { return m_slot; };
};
projects / bacula / bacula / blobdiff