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Unified size of large or unlimited pseudo drives to 4 TiB - 32 KiB

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This commit is contained in:
Thomas Schmitt 2021-02-28 13:20:09 +01:00
parent 2a977cfc4b
commit 31e8f5cf0e
4 changed files with 26 additions and 17 deletions
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2
cdrskin/cdrskin_timestamp.h
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@ -1 +1 @@
#define Cdrskin_timestamP "2021.02.28.121708"
#define Cdrskin_timestamP "2021.02.28.121943"

28
libburn/drive.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 - 2020 Thomas Schmitt <scdbackup@gmx.net>
Copyright (c) 2006 - 2021 Thomas Schmitt <scdbackup@gmx.net>
Provided under GPL version 2 or later.
*/
@ -375,8 +375,8 @@ static int burn_drive__is_rdwr(char *fname, int *stat_ret,
else if (is_rdwr)
ret = burn_os_stdio_capacity(fname, 0, &read_size);
if (ret <= 0 ||
read_size / (off_t) 2048 >= (off_t) 0x7ffffff0)
read_size = (off_t) 0x7ffffff0 * (off_t) 2048;
read_size >= BURN_DRIVE_MAX_BYTES)
read_size = BURN_DRIVE_MAX_BYTES;
}
if (is_rdwr && fd >= 0) {
@ -451,10 +451,10 @@ int burn_drive_grab_stdio(struct burn_drive *d, int flag)
if (stat_ret != -1 && S_ISREG(stbuf.st_mode) &&
stbuf.st_size > 0) {
d->status = BURN_DISC_APPENDABLE;
if (stbuf.st_size / (off_t) 2048
>= 0x7ffffff0) {
if (stbuf.st_size >= BURN_DRIVE_MAX_BYTES) {
d->status = BURN_DISC_FULL;
d->role_5_nwa = 0x7ffffff0;
d->role_5_nwa = (off_t) BURN_DRIVE_MAX_BYTES /
(off_t) 2048;
} else
d->role_5_nwa = stbuf.st_size / 2048 +
!!(stbuf.st_size % 2048);
@ -1782,8 +1782,7 @@ int burn_drive_grab_dummy(struct burn_drive_info *drive_infos[], char *fname)
{
int ret = -1, role = 0, fd;
int is_rdwr = 0, stat_ret = -1;
/* divided by 512 it needs to fit into a signed long integer */
off_t size = ((off_t) (512 * 1024 * 1024 - 1) * (off_t) 2048);
off_t size = BURN_DRIVE_MAX_BYTES;
off_t read_size = -1;
struct burn_drive *d= NULL, *regd_d;
struct stat stbuf;
@ -1859,10 +1858,11 @@ int burn_drive_grab_dummy(struct burn_drive_info *drive_infos[], char *fname)
(burn_drive_role_4_allowed & 8)) {
d->status = BURN_DISC_APPENDABLE;
d->block_types[BURN_WRITE_SAO] = 0;
if (stbuf.st_size / (off_t) 2048
>= 0x7ffffff0) {
if (stbuf.st_size > BURN_DRIVE_MAX_BYTES) {
d->status = BURN_DISC_FULL;
d->role_5_nwa = 0x7ffffff0;
d->role_5_nwa =
(off_t) BURN_DRIVE_MAX_BYTES /
(off_t) 2048; ;
} else
d->role_5_nwa = stbuf.st_size / 2048 +
!!(stbuf.st_size % 2048);
@ -2727,7 +2727,7 @@ off_t burn_disc_available_space(struct burn_drive *d,
if (ret != 1)
bytes = d->media_capacity_remaining;
if (bytes <= 0)
bytes = (off_t) (512 * 1024 * 1024 - 1) * (off_t) 2048;
bytes = BURN_DRIVE_MAX_BYTES;
if (bytes != d->media_capacity_remaining)
burn_drive_set_media_capacity_remaining(d, bytes);
} else {
@ -3410,8 +3410,8 @@ int burn_drive_find_by_thread_pid(struct burn_drive **d, pid_t pid,
*/
int burn_drive_set_media_capacity_remaining(struct burn_drive *d, off_t value)
{
if (value / (off_t) 2048 > (off_t) 0x7ffffff0)
value = ((off_t) 0x7ffffff0) * (off_t) 2048;
if (value > BURN_DRIVE_MAX_BYTES)
value = BURN_DRIVE_MAX_BYTES;
d->media_capacity_remaining = value;
return 1;
}

9
libburn/drive.h
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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 - 2014 Thomas Schmitt <scdbackup@gmx.net>
Copyright (c) 2006 - 2021 Thomas Schmitt <scdbackup@gmx.net>
Provided under GPL version 2 or later.
*/
@ -170,4 +170,11 @@ int burn_drive_has_feature(struct burn_drive *d, int feature_code,
int burn_drive_grab_stdio(struct burn_drive *d, int flag);
/* ts C10213 */
/* The size of limitless or oversized devices as pseudo drives */
/* Do not change this value because of its meaning to
burn_drive.media_read_capacity in libburn/transport.h
*/
#define BURN_DRIVE_MAX_BYTES ((off_t) (0x7ffffff0) * (off_t) 2048)
#endif /* __DRIVE */

4
libburn/transport.h
View File

@ -373,7 +373,9 @@ struct burn_drive
/* ts A81210 : Upper limit of readable data size,
0x7fffffff = unknown
0x7ffffff0 = 32 bit overflow, or unknown stdio size
0x7ffffff0 = BURN_DRIVE_MAX_BYTES / 2048
possibly truncated to prevent 32 bit
overflow, or unknown stdio size
*/
int media_read_capacity;
/* ts B60305 : Whether READ CAPACITY of CD is credible: