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For Linux 2.4, USB : Carefully avoided to inquire more data than available

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This commit is contained in:
Thomas Schmitt
2007-05-21 18:57:09 +00:00
parent 41f2a40a58
commit 79adcb520b
7 changed files with 472 additions and 94 deletions
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148
libburn/spc.c
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@ -29,7 +29,8 @@ extern struct libdax_msgs *libdax_messenger;
/* spc command set */
static unsigned char SPC_INQUIRY[] = { 0x12, 0, 0, 0, 255, 0 };
/* ts A70519 : allocation length byte 3+4 was 0,255 */
static unsigned char SPC_INQUIRY[] = { 0x12, 0, 0, 0, 36, 0 };
/*static char SPC_TEST[]={0,0,0,0,0,0};*/
static unsigned char SPC_PREVENT[] = { 0x1e, 0, 0, 0, 1, 0 };
@ -40,14 +41,35 @@ static unsigned char SPC_MODE_SELECT[] =
static unsigned char SPC_REQUEST_SENSE[] = { 0x03, 0, 0, 0, 18, 0 };
static unsigned char SPC_TEST_UNIT_READY[] = { 0x00, 0, 0, 0, 0, 0 };
/* ts A70519 : An initializer for the abstract SCSI command structure */
int scsi_init_command(struct command *c, unsigned char *opcode, int oplen)
{
if (oplen > 16)
return 0;
memcpy(c->opcode, opcode, oplen);
c->oplen = oplen;
c->dir = NO_TRANSFER;
c->dxfer_len = -1;
memset(c->sense, 0, sizeof(c->sense));
c->error = 0;
c->retry = 0;
c->page = NULL;
return 1;
}
int spc_test_unit_ready_r(struct burn_drive *d, int *key, int *asc, int *ascq)
{
struct command c;
c.retry = 0;
scsi_init_command(&c, SPC_TEST_UNIT_READY,sizeof(SPC_TEST_UNIT_READY));
/*
c.oplen = sizeof(SPC_TEST_UNIT_READY);
memcpy(c.opcode, SPC_TEST_UNIT_READY, sizeof(SPC_TEST_UNIT_READY));
c.page = NULL;
*/
c.retry = 0;
c.dir = NO_TRANSFER;
d->issue_command(d, &c);
if (c.error) {
@ -68,7 +90,7 @@ int spc_test_unit_ready(struct burn_drive *d)
/* ts A70315 */
/** Wait until the drive state becomes clear in or until max_usec elapsed */
/** Wait until the drive state becomes clear or until max_usec elapsed */
int spc_wait_unit_attention(struct burn_drive *d, int max_sec)
{
int i, ret, key, asc, ascq;
@ -89,9 +111,14 @@ void spc_request_sense(struct burn_drive *d, struct buffer *buf)
{
struct command c;
scsi_init_command(&c, SPC_REQUEST_SENSE, sizeof(SPC_REQUEST_SENSE));
c.retry = 0;
/*
c.oplen = sizeof(SPC_REQUEST_SENSE);
memcpy(c.opcode, SPC_REQUEST_SENSE, sizeof(SPC_REQUEST_SENSE));
*/
c.dxfer_len= c.opcode[4];
c.retry = 0;
c.page = buf;
c.page->sectors = 0;
c.page->bytes = 0;
@ -113,24 +140,29 @@ void spc_inquiry(struct burn_drive *d)
struct burn_scsi_inquiry_data *id;
struct command c;
scsi_init_command(&c, SPC_INQUIRY, sizeof(SPC_INQUIRY));
/*
memcpy(c.opcode, SPC_INQUIRY, sizeof(SPC_INQUIRY));
c.retry = 1;
c.oplen = sizeof(SPC_INQUIRY);
*/
c.dxfer_len= (c.opcode[3] << 8) | c.opcode[4];
c.retry = 1;
c.page = &buf;
c.page->bytes = 0;
c.page->sectors = 0;
c.dir = FROM_DRIVE;
d->issue_command(d, &c);
id = (struct burn_scsi_inquiry_data *)d->idata;
id->vendor[8] = 0;
id->product[16] = 0;
id->revision[4] = 0;
memset(id->vendor, 0, 9);
memset(id->product, 0, 17);
memset(id->revision, 0, 5);
if (c.error) {
id->valid = -1;
return;
}
memcpy(id->vendor, c.page->data + 8, 8);
memcpy(id->product, c.page->data + 16, 16);
memcpy(id->revision, c.page->data + 32, 4);
id->valid = 1;
return;
}
@ -139,10 +171,13 @@ void spc_prevent(struct burn_drive *d)
{
struct command c;
scsi_init_command(&c, SPC_PREVENT, sizeof(SPC_PREVENT));
/*
memcpy(c.opcode, SPC_PREVENT, sizeof(SPC_PREVENT));
c.retry = 1;
c.oplen = sizeof(SPC_PREVENT);
c.page = NULL;
*/
c.retry = 1;
c.dir = NO_TRANSFER;
d->issue_command(d, &c);
}
@ -151,19 +186,27 @@ void spc_allow(struct burn_drive *d)
{
struct command c;
scsi_init_command(&c, SPC_ALLOW, sizeof(SPC_ALLOW));
/*
memcpy(c.opcode, SPC_ALLOW, sizeof(SPC_ALLOW));
c.retry = 1;
c.oplen = sizeof(SPC_ALLOW);
c.page = NULL;
*/
c.retry = 1;
c.dir = NO_TRANSFER;
d->issue_command(d, &c);
}
void spc_sense_caps(struct burn_drive *d)
/*
ts A70518 : Do not call with *alloc_len < 8
*/
/** flag&1= do only inquire alloc_len */
static int spc_sense_caps_al(struct burn_drive *d, int *alloc_len, int flag)
{
struct buffer buf;
struct scsi_mode_data *m;
int size, page_length, num_write_speeds = 0, i, speed, ret;
int old_alloc_len, was_error = 0;
unsigned char *page;
struct command c;
struct burn_speed_descriptor *sd;
@ -171,18 +214,30 @@ void spc_sense_caps(struct burn_drive *d)
/* ts A61225 : 1 = report about post-MMC-1 speed descriptors */
static int speed_debug = 0;
if (*alloc_len < 8)
return 0;
memset(&buf, 0, sizeof(buf));
scsi_init_command(&c, SPC_MODE_SENSE, sizeof(SPC_MODE_SENSE));
/*
memcpy(c.opcode, SPC_MODE_SENSE, sizeof(SPC_MODE_SENSE));
c.retry = 1;
c.oplen = sizeof(SPC_MODE_SENSE);
*/
c.dxfer_len = *alloc_len;
c.opcode[7] = (c.dxfer_len >> 8) & 0xff;
c.opcode[8] = c.dxfer_len & 0xff;
c.retry = 1;
c.opcode[2] = 0x2A;
c.page = &buf;
c.page->bytes = 0;
c.page->sectors = 0;
c.dir = FROM_DRIVE;
d->issue_command(d, &c);
if (c.error)
if (c.error) {
memset(&buf, 0, sizeof(buf));
d->mdata->valid = -1;
was_error = 1;
}
size = c.page->data[0] * 256 + c.page->data[1];
m = d->mdata;
@ -195,6 +250,14 @@ void spc_sense_caps(struct burn_drive *d)
set of speed descriptors. In MMC-5 E.11 it is declared "legacy".
*/
page_length = page[1];
old_alloc_len = *alloc_len;
*alloc_len = page_length + 8;
if (flag & 1)
return !was_error;
if (page_length + 8 > old_alloc_len)
page_length = old_alloc_len - 8;
if (page_length < 22)
return 0;
m->valid = 0;
burn_mdata_free_subs(m);
@ -253,7 +316,7 @@ void spc_sense_caps(struct burn_drive *d)
0x0002013c,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
msg, 0, 0);
return;
return 0;
}
for (i = 0; i < num_write_speeds; i++) {
@ -297,6 +360,24 @@ try_mmc_get_performance:;
fprintf(stderr,
"LIBBURN_DEBUG: ACh min_write_speed = %d , max_write_speed = %d\n",
m->min_write_speed, m->max_write_speed);
return !was_error;
}
void spc_sense_caps(struct burn_drive *d)
{
int alloc_len, start_len = 22, ret;
/* first command execution to learn Allocation Length */
alloc_len = start_len;
ret = spc_sense_caps_al(d, &alloc_len, 1);
/*
fprintf(stderr,"LIBBURN_DEBUG: 5Ah alloc_len = %d , ret = %d\n",
alloc_len, ret);
*/
if (alloc_len >= start_len && ret > 0)
/* second execution with announced length */
spc_sense_caps_al(d, &alloc_len, 0);
}
@ -304,13 +385,19 @@ void spc_sense_error_params(struct burn_drive *d)
{
struct buffer buf;
struct scsi_mode_data *m;
int size;
int size, alloc_len = 12 ;
unsigned char *page;
struct command c;
scsi_init_command(&c, SPC_MODE_SENSE, sizeof(SPC_MODE_SENSE));
/*
memcpy(c.opcode, SPC_MODE_SENSE, sizeof(SPC_MODE_SENSE));
c.retry = 1;
c.oplen = sizeof(SPC_MODE_SENSE);
*/
c.dxfer_len = alloc_len;
c.opcode[7] = (c.dxfer_len >> 8) & 0xff;
c.opcode[8] = c.dxfer_len & 0xff;
c.retry = 1;
c.opcode[2] = 0x01;
c.page = &buf;
c.page->bytes = 0;
@ -332,9 +419,12 @@ void spc_select_error_params(struct burn_drive *d,
struct buffer buf;
struct command c;
scsi_init_command(&c, SPC_MODE_SELECT, sizeof(SPC_MODE_SELECT));
/*
memcpy(c.opcode, SPC_MODE_SELECT, sizeof(SPC_MODE_SELECT));
c.retry = 1;
c.oplen = sizeof(SPC_MODE_SELECT);
*/
c.retry = 1;
c.opcode[8] = 8 + 2 + d->mdata->retry_page_length;
c.page = &buf;
c.page->bytes = 0;
@ -363,7 +453,7 @@ void spc_sense_write_params(struct burn_drive *d)
{
struct buffer buf;
struct scsi_mode_data *m;
int size, dummy;
int size, dummy, alloc_len = 10;
unsigned char *page;
struct command c;
@ -371,9 +461,15 @@ void spc_sense_write_params(struct burn_drive *d)
/* a ssert(d->mdata->cdr_write || d->mdata->cdrw_write ||
d->mdata->dvdr_write || d->mdata->dvdram_write); */
scsi_init_command(&c, SPC_MODE_SENSE, sizeof(SPC_MODE_SENSE));
/*
memcpy(c.opcode, SPC_MODE_SENSE, sizeof(SPC_MODE_SENSE));
c.retry = 1;
c.oplen = sizeof(SPC_MODE_SENSE);
*/
c.dxfer_len = alloc_len;
c.opcode[7] = (c.dxfer_len >> 8) & 0xff;
c.opcode[8] = c.dxfer_len & 0xff;
c.retry = 1;
c.opcode[2] = 0x05;
c.page = &buf;
c.page->bytes = 0;
@ -428,9 +524,12 @@ void spc_select_write_params(struct burn_drive *d,
o->block_type,spc_block_type(o->block_type));
*/
scsi_init_command(&c, SPC_MODE_SELECT, sizeof(SPC_MODE_SELECT));
/*
memcpy(c.opcode, SPC_MODE_SELECT, sizeof(SPC_MODE_SELECT));
c.retry = 1;
c.oplen = sizeof(SPC_MODE_SELECT);
*/
c.retry = 1;
c.opcode[8] = 8 + 2 + d->mdata->write_page_length;
c.page = &buf;
c.page->bytes = 0;
@ -488,9 +587,12 @@ void spc_probe_write_modes(struct burn_drive *d)
try_block_type = useable_block_type;
last_try= 1;
}
scsi_init_command(&c, SPC_MODE_SELECT,sizeof(SPC_MODE_SELECT));
/*
memcpy(c.opcode, SPC_MODE_SELECT, sizeof(SPC_MODE_SELECT));
c.retry = 1;
c.oplen = sizeof(SPC_MODE_SELECT);
*/
c.retry = 1;
c.opcode[8] = 8 + 2 + 0x32;
c.page = &buf;