partx: add mac partition table support
Signed-off-by: Davidlohr Bueso <dave@xxxxxxx>
---
partx/mac.c | 74 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 74 insertions(+), 0 deletions(-)
create mode 100644 partx/mac.c
diff --git a/partx/mac.c b/partx/mac.c
new file mode 100644
index 0000000..0f635ea
--- /dev/null
+++ b/partx/mac.c
@@ -0,0 +1,74 @@
+/*
+ * Lifted from kpartx's mac.c
+ *
+ * Integrated to partx (utils-linux-ng)
+ * Davidlohr Bueso <dave@xxxxxxx>
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+
+#include "bitops.h"
+#include "partx.h"
+
+#define MAC_PARTITION_MAGIC 0x504d
+#define MAC_DRIVER_MAGIC 0x4552
+
+struct mac_partition {
+ uint16_t signature; /* expected to be MAC_PARTITION_MAGIC */
+ uint16_t res1;
+ uint32_t map_count; /* # blocks in partition map */
+ uint32_t start_block; /* absolute starting block # of partition */
+ uint32_t block_count; /* number of blocks in partition */
+ /* there is more stuff after this that we don't need */
+};
+
+/* Driver descriptor structure, in block 0 */
+struct mac_driver_desc {
+ uint16_t signature; /* expected to be MAC_DRIVER_MAGIC */
+ uint16_t block_size;
+ uint32_t block_count;
+};
+
+int
+read_mac_pt(int fd, struct slice all, struct slice *sp, int ns) {
+ struct mac_driver_desc *md;
+ struct mac_partition *part;
+ unsigned secsize;
+ char *data;
+ int blk, blocks_in_map;
+ int n = 0;
+
+ md = (struct mac_driver_desc *) getblock(fd, 0);
+ if (md == NULL)
+ return -1;
+
+ if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC)
+ return -1;
+
+ secsize = be16_to_cpu(md->block_size);
+ data = getblock(fd, secsize/512);
+ if (!data)
+ return -1;
+ part = (struct mac_partition *) (data + secsize%512);
+
+ if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
+ return -1;
+
+ blocks_in_map = be32_to_cpu(part->map_count);
+ for (blk = 1; blk <= blocks_in_map && blk <= ns; ++blk, ++n) {
+ int pos = blk * secsize;
+ data = getblock(fd, pos/512);
+ if (!data)
+ return -1;
+
+ part = (struct mac_partition *) (data + pos%512);
+ if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
+ break;
+
+ sp[n].start = be32_to_cpu(part->start_block) * (secsize/512);
+ sp[n].size = be32_to_cpu(part->block_count) * (secsize/512);
+ }
+ return n;
+}
--
1.7.0.4
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