Changeset b53e6d9 in mainline for uspace/srv/part/mbr_part/mbr_part.c

Timestamp:

2009-09-04T22:11:24Z (15 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

3052ff4, 502984be, da3e227

Parents:

40240b1 (diff), 309ede1 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge small improvements to mbd_part and bdd.

File:

• uspace/srv/part/mbr_part/mbr_part.c (modified) (3 diffs)

uspace/srv/part/mbr_part/mbr_part.c

@@ -39 +39 @@
  *
  * Limitations:
- *
+ * 
  * Only works with boot records using LBA. CHS-only records are not
- * supported. Maximum number of partitions is fixed.
+ * supported.
+ *
+ * Referemces:
+ *      
+ * The source of MBR structures for this driver have been the following
+ * Wikipedia articles:
+ *      - http://en.wikipedia.org/wiki/Master_Boot_Record
+ *      - http://en.wikipedia.org/wiki/Extended_boot_record
+ *
+ * The fact that the extended partition has type 0x05 is pure observation.
+ * (TODO: can it have any other type number?)
  */
 
@@ -70 +80 @@
 
         /** Boot record signature */
-        BR_SIGNATURE    = 0xAA55,
+        BR_SIGNATURE    = 0xAA55
 };
 
 enum ptype {
+        /** Unused partition entry */
+        PT_UNUSED       = 0x00,
         /** Extended partition */
-        PT_EXTENDED     = 0x05
+        PT_EXTENDED     = 0x05,
 };
 
@@ -365 +377 @@
         part->length     = len;
 
-        part->present = (sa != 0 || len != 0) ? true : false;
+        part->present = (pte->ptype != PT_UNUSED) ? true : false;
+
         part->dev = 0;
         part->next = NULL;