Changeset 4046b2f4 in mainline for uspace/lib/block/libblock.c

Timestamp:

2011-08-30T17:35:04Z (13 years ago)

Author:

Martin Decky <martin@…>

Branches:

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

Children:

7a72ce1a

Parents:

c3d19ac

Message:

TOC reading support
cherrypicked from lp:~jkavalik/cdfs/main

File:

• uspace/lib/block/libblock.c (modified) (3 diffs)

uspace/lib/block/libblock.c

@@ -93 +93 @@
 static int get_block_size(async_sess_t *, size_t *);
 static int get_num_blocks(async_sess_t *, aoff64_t *);
+static int read_toc(async_sess_t *, uint8_t);
 static aoff64_t ba_ltop(devcon_t *, aoff64_t);
 
@@ -891 +892 @@
 }
 
+/** Get TOC from device.
+ *
+ * @param service_id Service ID of the block device.
+ * @param session    Starting session.
+ * @param data       Buffer to read TOC into.
+ *
+ * @return EOK on success.
+ * @return Error code on failure.
+ *
+ */
+int block_get_toc(service_id_t service_id, uint8_t session, void *data)
+{
+        devcon_t *devcon = devcon_search(service_id);
+        assert(devcon);
+        
+        fibril_mutex_lock(&devcon->comm_area_lock);
+        
+        int rc = read_toc(devcon->sess, session);
+        if (rc == EOK)
+                memcpy(buf, devcon->comm_area, devcon->pblock_size);
+        
+        fibril_mutex_unlock(&devcon->comm_area_lock);
+        
+        return rc;
+}
+
 /** Read blocks from block device.
  *
@@ -981 +1008 @@
 }
 
+/** Get TOC from block device. */
+static int read_toc(async_sess_t *sess, uint8_t session)
+{
+        async_exch_t *exch = async_exchange_begin(sess);
+        int rc = async_req_1_0(exch, BD_READ_TOC, session);
+        async_exchange_end(exch);
+
+        return rc;
+}
+
 /** Convert logical block address to physical block address. */
 static aoff64_t ba_ltop(devcon_t *devcon, aoff64_t lba)