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authorMarcus Brinkmann <marcus@gnu.org>2001-01-09 03:20:39 +0000
committerMarcus Brinkmann <marcus@gnu.org>2001-01-09 03:20:39 +0000
commitfc67fa5f1239e49d5c86cc1bed3b53f1ef4a6f74 (patch)
treee06e022c9010078c645e4149ec796eff58115709 /linux/dev
parentcadc821bbcdfb11bf7e1148727ad77485ad16372 (diff)
2001-01-09 Marcus Brinkmann <marcus@gnu.org>
* include/device/device_types.h: New get_status call DEV_GET_RECORDS to get the number of records of a device (rather than the number of bytes). Accordingly define DEV_GET_RECORDS_DEVICE_RECORDS, DEV_GET_RECORDS_RECORD_SIZE and DEV_GET_RECORDS_COUNT. * linux/dev/glue/block.c (device_get_status): Handle DEV_GET_RECORDS.
Diffstat (limited to 'linux/dev')
-rw-r--r--linux/dev/glue/block.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/linux/dev/glue/block.c b/linux/dev/glue/block.c
index c450ea4..f6506ee 100644
--- a/linux/dev/glue/block.c
+++ b/linux/dev/glue/block.c
@@ -1632,6 +1632,42 @@ device_get_status (void *d, dev_flavor_t flavor, dev_status_t status,
*status_count = DEV_GET_SIZE_COUNT;
break;
+ case DEV_GET_RECORDS:
+ if (disk_major (MAJOR (bd->dev)))
+ {
+ assert (bd->ds->gd);
+
+ if (bd->part >= 0)
+ {
+ struct disklabel *lp;
+
+ assert (bd->ds->labels);
+ lp = bd->ds->labels[MINOR (bd->dev)];
+ assert (lp);
+ (status[DEV_GET_RECORDS_DEVICE_RECORDS]
+ = lp->d_partitions[bd->part].p_size);
+ }
+ else
+ (status[DEV_GET_RECORDS_DEVICE_RECORDS]
+ = bd->ds->gd->part[MINOR (bd->dev)].nr_sects);
+
+ status[DEV_GET_RECORDS_RECORD_SIZE] = 512;
+ }
+ else
+ {
+ assert (blk_size[MAJOR (bd->dev)]);
+ (status[DEV_GET_RECORDS_DEVICE_RECORDS]
+ = blk_size[MAJOR (bd->dev)][MINOR (bd->dev)]);
+ status[DEV_GET_RECORDS_RECORD_SIZE] = BLOCK_SIZE;
+ }
+ /* Always return DEV_GET_RECORDS_COUNT. This is what all native
+ Mach drivers do, and makes it possible to detect the absence
+ of the call by setting it to a different value on input. MiG
+ makes sure that we will never return more integers than the
+ user asked for. */
+ *status_count = DEV_GET_RECORDS_COUNT;
+ break;
+
case V_GETPARMS:
if (*status_count < (sizeof (struct disk_parms) / sizeof (int)))
return D_INVALID_OPERATION;