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Changed experimental ioctl from CDROM_REVALIDATE to CDROM_SIMUL_CHANGE

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This commit is contained in:
Thomas Schmitt 2020-09-20 10:45:15 +02:00
parent 8b9a8cfb4b
commit ab6b1039a4
2 changed files with 43 additions and 31 deletions
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2
cdrskin/cdrskin_timestamp.h
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@ -1 +1 @@
#define Cdrskin_timestamP "2020.08.26.140343"
#define Cdrskin_timestamP "2020.09.20.084444"

72
libburn/sg-linux.c
View File

@ -827,52 +827,64 @@ static int sg_os_revalidate_disc(struct burn_drive *d)
{
/* <<< only for compiler tests */
/* # def ine BURN_CDROM_REVALIDATE 0x5332 */
/* # def ine BURN_CDROM_SIMUL_CHANGE 0x5332 */
/* >>> if ioctl CDROM_REVALIDATE is accepted in the kernel:
#i fdef CDROM_REVALIDATE
#d efine BURN_CDROM_REVALIDATE CDROM_REVALIDATE
#e ndif
*/
#ifdef CDROM_SIMUL_CHANGE
#define BURN_CDROM_SIMUL_CHANGE CDROM_SIMUL_CHANGE
#endif
#ifdef BURN_CDROM_REVALIDATE
#ifdef BURN_CDROM_SIMUL_CHANGE
int i, ioctl_ret, reval_n_wait= 3, ret, os_errno;
int fd, ret;
long old_blocks, new_blocks;
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;
}
ret = ioctl(d->fd, BLKGETSIZE, &old_blocks);
if (ret == -1)
old_blocks = -1;
/* Schedule a simulated medium change event */
ioctl(d->fd, BURN_CDROM_SIMUL_CHANGE, 0);
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00000002, LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_HIGH,
msg, os_errno, 0);
"Emitted ioctl(CDROM_SIMUL_CHANGE)", 0, 0);
/* Try to trigger actual device assessment by a open(2) call */
fd = open(d->devname, O_RDONLY | O_NDELAY);
if (fd == -1) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00000002, LIBDAX_MSGS_SEV_DEBUG,
LIBDAX_MSGS_PRIO_HIGH,
"Failed to open device file after ioctl(CDROM_SIMUL_CHANGE)",
errno, 0);
ret = 0; goto ex;
}
close(fd);
ret = ioctl(d->fd, BLKGETSIZE, &new_blocks);
if (ret == -1) {
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00000002, LIBDAX_MSGS_SEV_DEBUG,
LIBDAX_MSGS_PRIO_HIGH,
"BLKGETSIZE failed after ioctl(CDROM_SIMUL_CHANGE)",
errno, 0);
} else if (old_blocks != new_blocks) {
sprintf(msg,
"BLKGETSIZE indicates size change from %ld to %ld blocks",
old_blocks , new_blocks);
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00000002, LIBDAX_MSGS_SEV_DEBUG,
LIBDAX_MSGS_PRIO_HIGH, msg, 0, 0);
}
ex:
BURN_FREE_MEM(msg);
return ret;
return 1;
#else
return 0;
#endif /* CDROM_REVALIDATE */
#endif /* BURN_CDROM_SIMUL_CHANGE */
}