Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / block / partitions / sysv68.c

diff --git a/kernel/block/partitions/sysv68.c b/kernel/block/partitions/sysv68.c
new file mode 100644 (file)
index 0000000..9627ccf
--- /dev/null
+++ b/kernel/block/partitions/sysv68.c
@@ -0,0 +1,95 @@
+/*
+ *  fs/partitions/sysv68.c
+ *
+ *  Copyright (C) 2007 Philippe De Muyter <phdm@macqel.be>
+ */
+
+#include "check.h"
+#include "sysv68.h"
+
+/*
+ *     Volume ID structure: on first 256-bytes sector of disk
+ */
+
+struct volumeid {
+       u8      vid_unused[248];
+       u8      vid_mac[8];     /* ASCII string "MOTOROLA" */
+};
+
+/*
+ *     config block: second 256-bytes sector on disk
+ */
+
+struct dkconfig {
+       u8      ios_unused0[128];
+       __be32  ios_slcblk;     /* Slice table block number */
+       __be16  ios_slccnt;     /* Number of entries in slice table */
+       u8      ios_unused1[122];
+};
+
+/*
+ *     combined volumeid and dkconfig block
+ */
+
+struct dkblk0 {
+       struct volumeid dk_vid;
+       struct dkconfig dk_ios;
+};
+
+/*
+ *     Slice Table Structure
+ */
+
+struct slice {
+       __be32  nblocks;                /* slice size (in blocks) */
+       __be32  blkoff;                 /* block offset of slice */
+};
+
+
+int sysv68_partition(struct parsed_partitions *state)
+{
+       int i, slices;
+       int slot = 1;
+       Sector sect;
+       unsigned char *data;
+       struct dkblk0 *b;
+       struct slice *slice;
+       char tmp[64];
+
+       data = read_part_sector(state, 0, &sect);
+       if (!data)
+               return -1;
+
+       b = (struct dkblk0 *)data;
+       if (memcmp(b->dk_vid.vid_mac, "MOTOROLA", sizeof(b->dk_vid.vid_mac))) {
+               put_dev_sector(sect);
+               return 0;
+       }
+       slices = be16_to_cpu(b->dk_ios.ios_slccnt);
+       i = be32_to_cpu(b->dk_ios.ios_slcblk);
+       put_dev_sector(sect);
+
+       data = read_part_sector(state, i, &sect);
+       if (!data)
+               return -1;
+
+       slices -= 1; /* last slice is the whole disk */
+       snprintf(tmp, sizeof(tmp), "sysV68: %s(s%u)", state->name, slices);
+       strlcat(state->pp_buf, tmp, PAGE_SIZE);
+       slice = (struct slice *)data;
+       for (i = 0; i < slices; i++, slice++) {
+               if (slot == state->limit)
+                       break;
+               if (be32_to_cpu(slice->nblocks)) {
+                       put_partition(state, slot,
+                               be32_to_cpu(slice->blkoff),
+                               be32_to_cpu(slice->nblocks));
+                       snprintf(tmp, sizeof(tmp), "(s%u)", i);
+                       strlcat(state->pp_buf, tmp, PAGE_SIZE);
+               }
+               slot++;
+       }
+       strlcat(state->pp_buf, "\n", PAGE_SIZE);
+       put_dev_sector(sect);
+       return 1;
+}