fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / fs / partitions / msdos.c

diff --git a/fs/partitions/msdos.c b/fs/partitions/msdos.c
index 3ed5cb5..8c7af17 100644 (file)
--- a/fs/partitions/msdos.c
+++ b/fs/partitions/msdos.c
@@ -19,7 +19,6 @@
  *  Re-organised Feb 1998 Russell King
  */
 
-#include <linux/config.h>
 
 #include "check.h"
 #include "msdos.h"
@@ -33,13 +32,11 @@
 #include <asm/unaligned.h>
 
 #define SYS_IND(p)     (get_unaligned(&p->sys_ind))
-#define NR_SECTS(p)    ({ __typeof__(p->nr_sects) __a =        \
-                               get_unaligned(&p->nr_sects);    \
+#define NR_SECTS(p)    ({ __le32 __a = get_unaligned(&p->nr_sects);    \
                                le32_to_cpu(__a); \
                        })
 
-#define START_SECT(p)  ({ __typeof__(p->start_sect) __a =      \
-                               get_unaligned(&p->start_sect);  \
+#define START_SECT(p)  ({ __le32 __a = get_unaligned(&p->start_sect);  \
                                le32_to_cpu(__a); \
                        })
 
@@ -59,6 +56,31 @@ msdos_magic_present(unsigned char *p)
        return (p[0] == MSDOS_LABEL_MAGIC1 && p[1] == MSDOS_LABEL_MAGIC2);
 }
 
+/* Value is EBCDIC 'IBMA' */
+#define AIX_LABEL_MAGIC1       0xC9
+#define AIX_LABEL_MAGIC2       0xC2
+#define AIX_LABEL_MAGIC3       0xD4
+#define AIX_LABEL_MAGIC4       0xC1
+static int aix_magic_present(unsigned char *p, struct block_device *bdev)
+{
+       Sector sect;
+       unsigned char *d;
+       int ret = 0;
+
+       if (p[0] != AIX_LABEL_MAGIC1 &&
+               p[1] != AIX_LABEL_MAGIC2 &&
+               p[2] != AIX_LABEL_MAGIC3 &&
+               p[3] != AIX_LABEL_MAGIC4)
+               return 0;
+       d = read_dev_sector(bdev, 7, &sect);
+       if (d) {
+               if (d[0] == '_' && d[1] == 'L' && d[2] == 'V' && d[3] == 'M')
+                       ret = 1;
+               put_dev_sector(sect);
+       };
+       return ret;
+}
+
 /*
  * Create devices for each logical partition in an extended partition.
  * The logical partitions form a linked list, with each entry being
@@ -202,12 +224,12 @@ parse_solaris_x86(struct parsed_partitions *state, struct block_device *bdev,
 #endif
 }
 
-#if defined(CONFIG_BSD_DISKLABEL) || defined(CONFIG_NEC98_PARTITION)
+#if defined(CONFIG_BSD_DISKLABEL)
 /* 
  * Create devices for BSD partitions listed in a disklabel, under a
  * dos-like partition. See parse_extended() for more information.
  */
-void
+static void
 parse_bsd(struct parsed_partitions *state, struct block_device *bdev,
                u32 offset, u32 size, int origin, char *flavour,
                int max_partitions)
@@ -246,6 +268,9 @@ parse_bsd(struct parsed_partitions *state, struct block_device *bdev,
                put_partition(state, state->next++, bsd_start, bsd_size);
        }
        put_dev_sector(sect);
+       if (le16_to_cpu(l->d_npartitions) > max_partitions)
+               printk(" (ignored %d more)",
+                      le16_to_cpu(l->d_npartitions) - max_partitions);
        printk(" >\n");
 }
 #endif
@@ -371,6 +396,7 @@ static struct {
        {MINIX_PARTITION, parse_minix},
        {UNIXWARE_PARTITION, parse_unixware},
        {SOLARIS_X86_PARTITION, parse_solaris_x86},
+       {NEW_SOLARIS_X86_PARTITION, parse_solaris_x86},
        {0, NULL},
 };
  
@@ -389,8 +415,29 @@ int msdos_partition(struct parsed_partitions *state, struct block_device *bdev)
                put_dev_sector(sect);
                return 0;
        }
+
+       if (aix_magic_present(data, bdev)) {
+               put_dev_sector(sect);
+               printk( " [AIX]");
+               return 0;
+       }
+
+       /*
+        * Now that the 55aa signature is present, this is probably
+        * either the boot sector of a FAT filesystem or a DOS-type
+        * partition table. Reject this in case the boot indicator
+        * is not 0 or 0x80.
+        */
        p = (struct partition *) (data + 0x1be);
+       for (slot = 1; slot <= 4; slot++, p++) {
+               if (p->boot_ind != 0 && p->boot_ind != 0x80) {
+                       put_dev_sector(sect);
+                       return 0;
+               }
+       }
+
 #ifdef CONFIG_EFI_PARTITION
+       p = (struct partition *) (data + 0x1be);
        for (slot = 1 ; slot <= 4 ; slot++, p++) {
                /* If this is an EFI GPT disk, msdos should ignore it. */
                if (SYS_IND(p) == EFI_PMBR_OSTYPE_EFI_GPT) {
@@ -398,8 +445,8 @@ int msdos_partition(struct parsed_partitions *state, struct block_device *bdev)
                        return 0;
                }
        }
-       p = (struct partition *) (data + 0x1be);
 #endif
+       p = (struct partition *) (data + 0x1be);
 
        /*
         * Look for partitions in two passes: