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Testing use of experimental ioctl CDROM_REVALIDATE after media state changes

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This commit is contained in:
Thomas Schmitt
2020-08-22 15:22:11 +02:00
parent e09acf3b8a
commit 8d934ee7b8
5 changed files with 75 additions and 4 deletions
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62
libburn/sg-linux.c
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@ -1,7 +1,7 @@
/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
/* Copyright (c) 2004 - 2006 Derek Foreman, Ben Jansens
Copyright (c) 2006 - 2019 Thomas Schmitt <scdbackup@gmx.net>
Copyright (c) 2006 - 2020 Thomas Schmitt <scdbackup@gmx.net>
Provided under GPL version 2 or later.
*/
@ -820,6 +820,63 @@ static int sg_release_siblings(int sibling_fds[],
}
/* ts C00806 */
/** Urges the operating system to re-assess drive and medium state
*/
static int sg_os_revalidate_disc(struct burn_drive *d)
{
/* <<< only for compiler tests */
/* # def ine BURN_CDROM_REVALIDATE 0x5332 */
/* >>> if ioctl CDROM_REVALIDATE is accepted in the kernel:
#i fdef CDROM_REVALIDATE
#d efine BURN_CDROM_REVALIDATE CDROM_REVALIDATE
#e ndif
*/
#ifdef BURN_CDROM_REVALIDATE
int i, ioctl_ret, reval_n_wait= 3, ret, os_errno;
char *msg = NULL;
BURN_ALLOC_MEM(msg, char, 161);
for(i = 0; i < reval_n_wait; i++) {
os_errno = 0;
ioctl_ret = ioctl(d->fd, BURN_CDROM_REVALIDATE, 0);
if(ioctl_ret == 0)
break;
os_errno = errno;
if(errno != EBUSY)
break;
if(i < reval_n_wait - 1)
usleep(2000000);
}
if(ioctl_ret == 0) {
sprintf(msg,
"ioctl(CDROM_REVALIDATE) succeeded in try #%d", i);
ret = 1;
} else {
sprintf(msg, "ioctl(CDROM_REVALIDATE) failed");
ret = 0;
}
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00000002, LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_HIGH,
msg, os_errno, 0);
ex:
BURN_FREE_MEM(msg);
return ret;
#else
return 0;
#endif /* CDROM_REVALIDATE */
}
/* ts A60926 */
static int sg_close_drive(struct burn_drive *d)
{
@ -829,6 +886,9 @@ static int sg_close_drive(struct burn_drive *d)
return 0;
sg_release_siblings(d->sibling_fds, d->sibling_fnames,
&(d->sibling_count));
if(d->medium_state_changed > 0)
sg_os_revalidate_disc(d);
d->medium_state_changed = -1;
ret = sg_close_drive_fd(d->devname, d->global_index, &(d->fd), 0);
return ret;
}