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Minor partition() efficiency improvements (don't do regular partitioning

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i/o on cd drives)
This commit is contained in:
Ben Gras
2005-08-08 12:16:59 +00:00
parent 9df1cb9e48
commit f26239d1f8
5 changed files with 15 additions and 9 deletions
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14
drivers/libdriver/drvlib.c
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@@ -24,10 +24,11 @@ FORWARD _PROTOTYPE( void sort, (struct part_entry *table) );
/*============================================================================*
* partition *
*============================================================================*/
PUBLIC void partition(dp, device, style)
PUBLIC void partition(dp, device, style, atapi)
struct driver *dp; /* device dependent entry points */
int device; /* device to partition */
int style; /* partitioning style: floppy, primary, sub. */
int atapi; /* atapi device */
{
/* This routine is called on first open to initialize the partition tables
* of a device. It makes sure that each partition falls safely within the
@@ -48,9 +49,12 @@ int style; /* partitioning style: floppy, primary, sub. */
limit = base + div64u(dv->dv_size, SECTOR_SIZE);
/* Read the partition table for the device. */
if (!get_part_table(dp, device, 0L, table, &io))
if(!io || !get_iso_fake_part_table(dp, device, 0L, table))
return;
if(atapi) {
if(!get_iso_fake_part_table(dp, device, 0L, table))
return;
} else if(!get_part_table(dp, device, 0L, table, &io)) {
return;
}
/* Compute the device number of the first partition. */
switch (style) {
@@ -86,7 +90,7 @@ int style; /* partitioning style: floppy, primary, sub. */
if (style == P_PRIMARY) {
/* Each Minix primary partition can be subpartitioned. */
if (pe->sysind == MINIX_PART)
partition(dp, device + par, P_SUB);
partition(dp, device + par, P_SUB, atapi);
/* An extended partition has logical partitions. */
if (ext_part(pe->sysind))