summaryrefslogtreecommitdiffstats
path: root/block/partitions/mac.c
diff options
context:
space:
mode:
authorAl Viro <viro@zeniv.linux.org.uk>2011-09-16 00:25:05 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-01-03 22:54:06 -0500
commit9be96f3fd10187f185d84cf878cf032465bcced3 (patch)
tree432a430ed9e0cbe0c18916cd3c3992f09b3feb37 /block/partitions/mac.c
parent4752bc309b7604d507c973c7b7678ac2ce10a058 (diff)
downloadlinux-0-day-9be96f3fd10187f185d84cf878cf032465bcced3.tar.gz
move fs/partitions to block/
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'block/partitions/mac.c')
-rw-r--r--block/partitions/mac.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/block/partitions/mac.c b/block/partitions/mac.c
new file mode 100644
index 0000000..11f688b
--- /dev/null
+++ b/block/partitions/mac.c
@@ -0,0 +1,134 @@
+/*
+ * fs/partitions/mac.c
+ *
+ * Code extracted from drivers/block/genhd.c
+ * Copyright (C) 1991-1998 Linus Torvalds
+ * Re-organised Feb 1998 Russell King
+ */
+
+#include <linux/ctype.h>
+#include "check.h"
+#include "mac.h"
+
+#ifdef CONFIG_PPC_PMAC
+#include <asm/machdep.h>
+extern void note_bootable_part(dev_t dev, int part, int goodness);
+#endif
+
+/*
+ * Code to understand MacOS partition tables.
+ */
+
+static inline void mac_fix_string(char *stg, int len)
+{
+ int i;
+
+ for (i = len - 1; i >= 0 && stg[i] == ' '; i--)
+ stg[i] = 0;
+}
+
+int mac_partition(struct parsed_partitions *state)
+{
+ Sector sect;
+ unsigned char *data;
+ int slot, blocks_in_map;
+ unsigned secsize;
+#ifdef CONFIG_PPC_PMAC
+ int found_root = 0;
+ int found_root_goodness = 0;
+#endif
+ struct mac_partition *part;
+ struct mac_driver_desc *md;
+
+ /* Get 0th block and look at the first partition map entry. */
+ md = read_part_sector(state, 0, &sect);
+ if (!md)
+ return -1;
+ if (be16_to_cpu(md->signature) != MAC_DRIVER_MAGIC) {
+ put_dev_sector(sect);
+ return 0;
+ }
+ secsize = be16_to_cpu(md->block_size);
+ put_dev_sector(sect);
+ data = read_part_sector(state, secsize/512, &sect);
+ if (!data)
+ return -1;
+ part = (struct mac_partition *) (data + secsize%512);
+ if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) {
+ put_dev_sector(sect);
+ return 0; /* not a MacOS disk */
+ }
+ blocks_in_map = be32_to_cpu(part->map_count);
+ if (blocks_in_map < 0 || blocks_in_map >= DISK_MAX_PARTS) {
+ put_dev_sector(sect);
+ return 0;
+ }
+ strlcat(state->pp_buf, " [mac]", PAGE_SIZE);
+ for (slot = 1; slot <= blocks_in_map; ++slot) {
+ int pos = slot * secsize;
+ put_dev_sector(sect);
+ data = read_part_sector(state, pos/512, &sect);
+ if (!data)
+ return -1;
+ part = (struct mac_partition *) (data + pos%512);
+ if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
+ break;
+ put_partition(state, slot,
+ be32_to_cpu(part->start_block) * (secsize/512),
+ be32_to_cpu(part->block_count) * (secsize/512));
+
+ if (!strnicmp(part->type, "Linux_RAID", 10))
+ state->parts[slot].flags = ADDPART_FLAG_RAID;
+#ifdef CONFIG_PPC_PMAC
+ /*
+ * If this is the first bootable partition, tell the
+ * setup code, in case it wants to make this the root.
+ */
+ if (machine_is(powermac)) {
+ int goodness = 0;
+
+ mac_fix_string(part->processor, 16);
+ mac_fix_string(part->name, 32);
+ mac_fix_string(part->type, 32);
+
+ if ((be32_to_cpu(part->status) & MAC_STATUS_BOOTABLE)
+ && strcasecmp(part->processor, "powerpc") == 0)
+ goodness++;
+
+ if (strcasecmp(part->type, "Apple_UNIX_SVR2") == 0
+ || (strnicmp(part->type, "Linux", 5) == 0
+ && strcasecmp(part->type, "Linux_swap") != 0)) {
+ int i, l;
+
+ goodness++;
+ l = strlen(part->name);
+ if (strcmp(part->name, "/") == 0)
+ goodness++;
+ for (i = 0; i <= l - 4; ++i) {
+ if (strnicmp(part->name + i, "root",
+ 4) == 0) {
+ goodness += 2;
+ break;
+ }
+ }
+ if (strnicmp(part->name, "swap", 4) == 0)
+ goodness--;
+ }
+
+ if (goodness > found_root_goodness) {
+ found_root = slot;
+ found_root_goodness = goodness;
+ }
+ }
+#endif /* CONFIG_PPC_PMAC */
+ }
+#ifdef CONFIG_PPC_PMAC
+ if (found_root_goodness)
+ note_bootable_part(state->bdev->bd_dev, found_root,
+ found_root_goodness);
+#endif
+
+ put_dev_sector(sect);
+ strlcat(state->pp_buf, "\n", PAGE_SIZE);
+ return 1;
+}