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Improved drive capacity estimation for sparse regular files

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This commit is contained in:
Thomas Schmitt
2014-06-10 07:37:40 +00:00
parent 61e2176d03
commit ca532f7623
13 changed files with 78 additions and 26 deletions
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23
libburn/drive.c
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@@ -393,7 +393,7 @@ static int burn_drive__is_rdwr(char *fname, int *stat_ret,
if (S_ISREG(stbuf.st_mode))
read_size = stbuf.st_size;
else if (is_rdwr)
ret = burn_os_stdio_capacity(fname, &read_size);
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;
@@ -450,7 +450,7 @@ int burn_drive_grab_stdio(struct burn_drive *d, int flag)
d->media_read_capacity =
read_size / 2048 - !(read_size % 2048);
if ((stat_ret == -1 || is_rdwr) && d->devname[0]) {
ret = burn_os_stdio_capacity(d->devname, &size);
ret = burn_os_stdio_capacity(d->devname, 0, &size);
if (ret > 0)
burn_drive_set_media_capacity_remaining(d,
size);
@@ -1722,7 +1722,7 @@ int burn_drive_grab_dummy(struct burn_drive_info *drive_infos[], char *fname)
is_rdwr = burn_drive__is_rdwr(fname, &stat_ret, &stbuf,
&read_size, 1 | 2);
if (stat_ret == -1 || is_rdwr) {
ret = burn_os_stdio_capacity(fname, &size);
ret = burn_os_stdio_capacity(fname, 0, &size);
if (ret == -1) {
libdax_msgs_submit(libdax_messenger, -1,
0x00020009,
@@ -2637,7 +2637,8 @@ int burn_disc_get_msc1(struct burn_drive *d, int *start)
off_t burn_disc_available_space(struct burn_drive *d,
struct burn_write_opts *o)
{
int lba, nwa;
int lba, nwa, ret;
off_t bytes;
if (burn_drive_is_released(d))
return 0;
@@ -2646,9 +2647,13 @@ off_t burn_disc_available_space(struct burn_drive *d,
if (d->drive_role == 0)
return 0;
if (d->drive_role != 1) {
if (d->media_capacity_remaining <= 0)
burn_drive_set_media_capacity_remaining(d,
(off_t) (512 * 1024 * 1024 - 1) * (off_t) 2048);
ret = burn_os_stdio_capacity(d->devname, o->start_byte, &bytes);
if (ret != 1)
bytes = d->media_capacity_remaining;
if (bytes <= 0)
bytes = (off_t) (512 * 1024 * 1024 - 1) * (off_t) 2048;
if (bytes != d->media_capacity_remaining)
burn_drive_set_media_capacity_remaining(d, bytes);
} else {
if (o != NULL)
d->send_write_parameters(d, NULL, -1, o);
@@ -2897,7 +2902,7 @@ int burn_disc_get_multi_caps(struct burn_drive *d, enum burn_write_types wt,
/* stdio file drive : random access read-write */
o->start_adr = 1;
size = d->media_capacity_remaining;
burn_os_stdio_capacity(d->devname, &size);
burn_os_stdio_capacity(d->devname, 0, &size);
burn_drive_set_media_capacity_remaining(d, size);
o->start_range_high = d->media_capacity_remaining;
o->start_alignment = 2048; /* imposting a drive, not a file */
@@ -2909,7 +2914,7 @@ int burn_disc_get_multi_caps(struct burn_drive *d, enum burn_write_types wt,
/* stdio file drive : random access write-only */
o->start_adr = 1;
size = d->media_capacity_remaining;
burn_os_stdio_capacity(d->devname, &size);
burn_os_stdio_capacity(d->devname, 0, &size);
burn_drive_set_media_capacity_remaining(d, size);
/* >>> start_range_low = file size rounded to 2048 */;