* Version $Id$
*/
/*
- Copyright (C) 2000, 2001, 2002 Kern Sibbald and John Walker
+ Copyright (C) 2002-2003 Kern Sibbald and John Walker
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
#include "bacula.h" /* pull in global headers */
#include "stored.h" /* pull in Storage Deamon headers */
+static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
/*********************************************************************
* Acquire device for reading. We permit (for the moment)
*/
int acquire_device_for_read(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
{
- int stat;
+ bool vol_ok = false;
+ bool tape_previously_mounted;
+ bool tape_initially_mounted;
+ VOL_LIST *vol;
+ int autochanger = 0;
+ int i;
- lock_device(dev);
- if (dev->state & ST_READ || dev->num_writers > 0) {
- Jmsg(jcr, M_FATAL, 0, _("Device %s is busy.\n"), dev_name(dev));
- unlock_device(dev);
- return 0;
+ if (device_is_unmounted(dev)) {
+ Jmsg(jcr, M_WARNING, 0, _("device %s is BLOCKED due to user unmount.\n"),
+ dev_name(dev));
}
- dev->state &= ~ST_LABEL; /* force reread of label */
+ lock_device(dev);
block_device(dev, BST_DOING_ACQUIRE);
unlock_device(dev);
- stat = ready_dev_for_read(jcr, dev, block);
+
+ if (dev_state(dev, ST_READ) || dev->num_writers > 0) {
+ Jmsg2(jcr, M_FATAL, 0, _("Device %s is busy. Job %d canceled.\n"),
+ dev_name(dev), jcr->JobId);
+ goto get_out;
+ }
+
+ tape_previously_mounted = dev_state(dev, ST_READ) ||
+ dev_state(dev, ST_APPEND) ||
+ dev_state(dev, ST_LABEL);
+ tape_initially_mounted = tape_previously_mounted;
+
+ /* Find next Volume, if any */
+ vol = jcr->VolList;
+ if (!vol) {
+ Jmsg(jcr, M_FATAL, 0, _("No volumes specified. Job %d canceled.\n"), jcr->JobId);
+ goto get_out;
+ }
+ jcr->CurVolume++;
+ for (i=1; i<jcr->CurVolume; i++) {
+ vol = vol->next;
+ }
+ pm_strcpy(&jcr->VolumeName, vol->VolumeName);
+
+ for (i=0; i<5; i++) {
+ if (job_canceled(jcr)) {
+ Mmsg1(&dev->errmsg, _("Job %d canceled.\n"), jcr->JobId);
+ goto get_out; /* error return */
+ }
+ /*
+ * This code ensures that the device is ready for
+ * reading. If it is a file, it opens it.
+ * If it is a tape, it checks the volume name
+ */
+ for ( ; !(dev->state & ST_OPENED); ) {
+ Dmsg1(120, "bstored: open vol=%s\n", jcr->VolumeName);
+ if (open_dev(dev, jcr->VolumeName, READ_ONLY) < 0) {
+ Jmsg(jcr, M_FATAL, 0, _("Open device %s volume %s failed, ERR=%s\n"),
+ dev_name(dev), jcr->VolumeName, strerror_dev(dev));
+ goto get_out;
+ }
+ Dmsg1(129, "open_dev %s OK\n", dev_name(dev));
+ }
+ /****FIXME***** do not reread label if ioctl() says we are
+ * correctly possitioned. Possibly have way user can turn
+ * this optimization (to be implemented) off.
+ */
+ dev->state &= ~ST_LABEL; /* force reread of label */
+ Dmsg0(200, "calling read-vol-label\n");
+ switch (read_dev_volume_label(jcr, dev, block)) {
+ case VOL_OK:
+ vol_ok = true;
+ break; /* got it */
+ case VOL_IO_ERROR:
+ /*
+ * Send error message generated by read_dev_volume_label()
+ * only we really had a tape mounted. This supresses superfluous
+ * error messages when nothing is mounted.
+ */
+ if (tape_previously_mounted) {
+ Jmsg(jcr, M_WARNING, 0, "%s", jcr->errmsg);
+ }
+ goto default_path;
+ case VOL_NAME_ERROR:
+ if (tape_initially_mounted) {
+ tape_initially_mounted = false;
+ goto default_path;
+ }
+ /* Fall through */
+ default:
+ Jmsg(jcr, M_WARNING, 0, "%s", jcr->errmsg);
+default_path:
+ tape_previously_mounted = true;
+ Dmsg0(200, "dir_get_volume_info\n");
+ if (!dir_get_volume_info(jcr, GET_VOL_INFO_FOR_READ)) {
+ Jmsg1(jcr, M_WARNING, 0, "%s", jcr->errmsg);
+ }
+ /* Call autochanger only once unless ask_sysop called */
+ if (!autochanger) {
+ Dmsg2(200, "calling autoload Vol=%s Slot=%d\n",
+ jcr->VolumeName, jcr->VolCatInfo.Slot);
+ if ((autochanger=autoload_device(jcr, dev, 0, NULL))) {
+ continue;
+ }
+ }
+ /* Mount a specific volume and no other */
+ Dmsg0(200, "calling dir_ask_sysop\n");
+ if (!dir_ask_sysop_to_mount_volume(jcr, dev)) {
+ goto get_out; /* error return */
+ }
+ autochanger = 0; /* permit using autochanger again */
+ continue; /* try reading again */
+ } /* end switch */
+ break;
+ } /* end for loop */
+ if (!vol_ok) {
+ Jmsg1(jcr, M_FATAL, 0, _("Too many errors trying to mount device \"%s\".\n"),
+ dev_name(dev));
+ goto get_out;
+ }
+
+ dev->state &= ~ST_APPEND; /* clear any previous append mode */
+ dev->state |= ST_READ; /* set reed mode */
+ attach_jcr_to_device(dev, jcr); /* attach jcr to device */
+ Jmsg(jcr, M_INFO, 0, _("Ready to read from volume \"%s\" on device %s.\n"),
+ jcr->VolumeName, dev_name(dev));
+
+get_out:
P(dev->mutex);
unblock_device(dev);
V(dev->mutex);
- return stat;
+ return vol_ok;
}
/*
* Acquire device for writing. We permit multiple writers.
* If this is the first one, we read the label.
*
- * Returns: 0 if failed for any reason
- * 1 if successful
+ * Returns: NULL if failed for any reason
+ * dev if successful (may change if new dev opened)
+ * This routine must be single threaded because we may create
+ * multiple devices (for files), thus we have our own mutex
+ * on top of the device mutex.
*/
-int acquire_device_for_append(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
+DEVICE *acquire_device_for_append(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
{
int release = 0;
- int do_mount = 0;
+ bool recycle = false;
+ bool do_mount = false;
+ DEVICE *rtn_dev = NULL;
+ if (device_is_unmounted(dev)) {
+ Jmsg(jcr, M_WARNING, 0, _("device %s is BLOCKED due to user unmount.\n"),
+ dev_name(dev));
+ }
lock_device(dev);
+ block_device(dev, BST_DOING_ACQUIRE);
+ unlock_device(dev);
+ P(mutex); /* lock all devices */
Dmsg1(190, "acquire_append device is %s\n", dev_is_tape(dev)?"tape":"disk");
+
-
- if (dev->state & ST_APPEND) {
+ if (dev_state(dev, ST_APPEND)) {
/*
* Device already in append mode
*
* Check if we have the right Volume mounted
- * OK if AnonVols and volume info OK
- * OK if next volume matches current volume
- * otherwise mount desired volume obtained from
+ * OK if current volume info OK
+ * OK if next volume matches current volume
+ * otherwise mount desired volume obtained from
* dir_find_next_appendable_volume
*/
- strcpy(jcr->VolumeName, dev->VolHdr.VolName);
- if (((dev->capabilities & CAP_ANONVOLS) &&
- !dir_get_volume_info(jcr)) ||
- (!dir_find_next_appendable_volume(jcr) ||
- strcmp(dev->VolHdr.VolName, jcr->VolumeName) != 0)) { /* wrong tape mounted */
+ pm_strcpy(&jcr->VolumeName, dev->VolHdr.VolName);
+ if (!dir_get_volume_info(jcr, GET_VOL_INFO_FOR_WRITE) &&
+ !(dir_find_next_appendable_volume(jcr) &&
+ strcmp(dev->VolHdr.VolName, jcr->VolumeName) == 0)) { /* wrong tape mounted */
if (dev->num_writers != 0) {
- Jmsg(jcr, M_FATAL, 0, _("Device %s is busy writing with another Volume.\n"), dev_name(dev));
- unlock_device(dev);
- return 0;
+ DEVICE *d = ((DEVRES *)dev->device)->dev;
+ uint32_t open_vols = 0;
+ for ( ; d; d=d->next) {
+ open_vols++;
+ }
+ if (dev_state(dev, ST_FILE) && dev->max_open_vols > open_vols) {
+ d = init_dev(NULL, (DEVRES *)dev->device); /* init new device */
+ d->prev = dev; /* chain in new device */
+ d->next = dev->next;
+ dev->next = d;
+ /* Release old device */
+ P(dev->mutex);
+ unblock_device(dev);
+ V(dev->mutex);
+ /* Make new device current device and lock it */
+ dev = d;
+ lock_device(dev);
+ block_device(dev, BST_DOING_ACQUIRE);
+ unlock_device(dev);
+ } else {
+ Jmsg(jcr, M_FATAL, 0, _("Device %s is busy writing on another Volume.\n"), dev_name(dev));
+ goto get_out;
+ }
}
/* Wrong tape mounted, release it, then fall through to get correct one */
release = 1;
- do_mount = 1;
- }
+ do_mount = true;
+ } else {
+ /*
+ * At this point, the correct tape is already mounted, so
+ * we do not need to do mount_next_write_volume(), unless
+ * we need to recycle the tape.
+ */
+ recycle = strcmp(jcr->VolCatInfo.VolCatStatus, "Recycle") == 0;
+ if (recycle && dev->num_writers != 0) {
+ Jmsg(jcr, M_FATAL, 0, _("Cannot recycle volume \"%s\""
+ " because it is in use by another job."));
+ goto get_out;
+ }
+ }
} else {
/* Not already in append mode, so mount the device */
- if (dev->state & ST_READ) {
+ if (dev_state(dev, ST_READ)) {
Jmsg(jcr, M_FATAL, 0, _("Device %s is busy reading.\n"), dev_name(dev));
- unlock_device(dev);
- return 0;
+ goto get_out;
}
ASSERT(dev->num_writers == 0);
- do_mount = 1;
+ do_mount = true;
}
- if (do_mount) {
- block_device(dev, BST_DOING_ACQUIRE);
- unlock_device(dev);
+ if (do_mount || recycle) {
if (!mount_next_write_volume(jcr, dev, block, release)) {
- Jmsg(jcr, M_FATAL, 0, _("Could not ready device %s for append.\n"),
- dev_name(dev));
- P(dev->mutex);
- unblock_device(dev);
- unlock_device(dev);
- return 0;
+ if (!job_canceled(jcr)) {
+ /* Reduce "noise" -- don't print if job canceled */
+ Jmsg(jcr, M_FATAL, 0, _("Could not ready device %s for append.\n"),
+ dev_name(dev));
+ }
+ goto get_out;
}
- P(dev->mutex);
- unblock_device(dev);
}
dev->num_writers++;
- if (dev->num_writers > 1) {
- Dmsg2(0, "Hey!!!! There are %d writers on device %s\n", dev->num_writers,
- dev_name(dev));
- }
if (jcr->NumVolumes == 0) {
jcr->NumVolumes = 1;
}
attach_jcr_to_device(dev, jcr); /* attach jcr to device */
- unlock_device(dev);
- return 1; /* got it */
+ rtn_dev = dev; /* return device */
+
+/*
+ * If we jump here, it is an error return because
+ * rtn_dev will still be NULL
+ */
+get_out:
+ P(dev->mutex);
+ unblock_device(dev);
+ V(dev->mutex);
+ V(mutex); /* unlock other threads */
+ return rtn_dev;
}
/*
* the device remains open.
*
*/
-int release_device(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
+int release_device(JCR *jcr, DEVICE *dev)
{
- P(dev->mutex);
+ lock_device(dev);
Dmsg1(100, "release_device device is %s\n", dev_is_tape(dev)?"tape":"disk");
- if (dev->state & ST_READ) {
+ if (dev_state(dev, ST_READ)) {
dev->state &= ~ST_READ; /* clear read bit */
- if (!dev_is_tape(dev) || !(dev->capabilities & CAP_ALWAYSOPEN)) {
- if (dev->capabilities & CAP_OFFLINEUNMOUNT) {
- offline_dev(dev);
- }
+ if (!dev_is_tape(dev) || !dev_cap(dev, CAP_ALWAYSOPEN)) {
+ offline_or_rewind_dev(dev);
close_dev(dev);
}
/******FIXME**** send read volume usage statistics to director */
} else if (dev->num_writers > 0) {
dev->num_writers--;
- Dmsg1(00, "There are %d writers in release_device\n", dev->num_writers);
- if (dev->num_writers == 0) {
- weof_dev(dev, 1);
+ Dmsg1(100, "There are %d writers in release_device\n", dev->num_writers);
+ if (dev_state(dev, ST_LABEL)) {
Dmsg0(100, "dir_create_jobmedia_record. Release\n");
- dir_create_jobmedia_record(jcr);
- dev->VolCatInfo.VolCatFiles++; /* increment number of files */
+ if (!dir_create_jobmedia_record(jcr)) {
+ Jmsg(jcr, M_ERROR, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
+ jcr->VolCatInfo.VolCatName, jcr->Job);
+ }
+ /* If no more writers, write an EOF */
+ if (!dev->num_writers && dev_can_write(dev)) {
+ weof_dev(dev, 1);
+ }
+ dev->VolCatInfo.VolCatFiles = dev->file; /* set number of files */
+ dev->VolCatInfo.VolCatJobs++; /* increment number of jobs */
/* Note! do volume update before close, which zaps VolCatInfo */
- Dmsg0(100, "dir_update_vol_info. Release\n");
- dir_update_volume_info(jcr, &dev->VolCatInfo, 0); /* send Volume info to Director */
+ Dmsg0(100, "dir_update_vol_info. Release0\n");
+ dir_update_volume_info(jcr, dev, 0); /* send Volume info to Director */
+ }
- if (!dev_is_tape(dev) || !(dev->capabilities & CAP_ALWAYSOPEN)) {
- if (dev->capabilities & CAP_OFFLINEUNMOUNT) {
- offline_dev(dev);
- }
- close_dev(dev);
- }
- } else {
- Dmsg0(100, "dir_create_jobmedia_record. Release\n");
- dir_create_jobmedia_record(jcr);
- Dmsg0(100, "dir_update_vol_info. Release\n");
- dir_update_volume_info(jcr, &dev->VolCatInfo, 0); /* send Volume info to Director */
+ if (!dev->num_writers && (!dev_is_tape(dev) || !dev_cap(dev, CAP_ALWAYSOPEN))) {
+ offline_or_rewind_dev(dev);
+ close_dev(dev);
}
} else {
- Jmsg1(jcr, M_ERROR, 0, _("BAD ERROR: release_device %s not in use.\n"), dev_name(dev));
+ Jmsg2(jcr, M_ERROR, 0, _("BAD ERROR: release_device %s, Volume \"%s\" not in use.\n"),
+ dev_name(dev), NPRT(jcr->VolumeName));
}
detach_jcr_from_device(dev, jcr);
- V(dev->mutex);
- return 1;
-}
-
-
-
-/*
- * This routine ensures that the device is ready for
- * reading. If it is a file, it opens it.
- * If it is a tape, it checks the volume name
- *
- * Returns 0 on failure
- * Returns 1 on success
- */
-int ready_dev_for_read(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
-{
- if (!(dev->state & ST_OPENED)) {
- Dmsg1(120, "bstored: open vol=%s\n", jcr->VolumeName);
- if (open_dev(dev, jcr->VolumeName, READ_ONLY) < 0) {
- Jmsg(jcr, M_FATAL, 0, _("Open device %s volume %s failed, ERR=%s\n"),
- dev_name(dev), jcr->VolumeName, strerror_dev(dev));
- return 0;
- }
- Dmsg1(129, "open_dev %s OK\n", dev_name(dev));
- }
-
- for (;;) {
- if (job_cancelled(jcr)) {
- Mmsg0(&dev->errmsg, _("Job cancelled.\n"));
- return 0;
- }
- if (!rewind_dev(dev)) {
- Jmsg2(jcr, M_WARNING, 0, _("Rewind error on device %s. ERR=%s\n"),
- dev_name(dev), strerror_dev(dev));
- }
- switch (read_dev_volume_label(jcr, dev, block)) {
- case VOL_OK:
- break; /* got it */
- default:
- /* Send error message generated by read_dev_volume_label() */
- Jmsg(jcr, M_WARNING, 0, "%s", jcr->errmsg);
- if (!rewind_dev(dev)) {
- Jmsg2(jcr, M_WARNING, 0, _("Rewind error on device %s. ERR=%s\n"),
- dev_name(dev), strerror_dev(dev));
- }
- /* Mount a specific volume and no other */
- if (!dir_ask_sysop_to_mount_volume(jcr, dev)) {
- return 0; /* error return */
- }
- continue; /* try reading again */
- }
- break;
+ if (dev->prev && !dev_state(dev, ST_READ) && !dev->num_writers) {
+ P(mutex);
+ unlock_device(dev);
+ dev->prev->next = dev->next; /* dechain */
+ term_dev(dev);
+ V(mutex);
+ } else {
+ unlock_device(dev);
}
-
- dev->state |= ST_READ;
- return 1;
+ return 1;
}
projects / bacula / bacula / blobdiff