1 files changed, 166 insertions, 0 deletions

diff --git a/block/partitions/check.c b/block/partitions/check.c
new file mode 100644
index 000000000000..bc908672c976
--- /dev/null
+++ b/block/partitions/check.c
@@ -0,0 +1,166 @@
+/*
+ *  fs/partitions/check.c
+ *
+ *  Code extracted from drivers/block/genhd.c
+ *  Copyright (C) 1991-1998  Linus Torvalds
+ *  Re-organised Feb 1998 Russell King
+ *
+ *  We now have independent partition support from the
+ *  block drivers, which allows all the partition code to
+ *  be grouped in one location, and it to be mostly self
+ *  contained.
+ *
+ *  Added needed MAJORS for new pairs, {hdi,hdj}, {hdk,hdl}
+ */
+
+#include <linux/slab.h>
+#include <linux/ctype.h>
+#include <linux/genhd.h>
+
+#include "check.h"
+
+#include "acorn.h"
+#include "amiga.h"
+#include "atari.h"
+#include "ldm.h"
+#include "mac.h"
+#include "msdos.h"
+#include "osf.h"
+#include "sgi.h"
+#include "sun.h"
+#include "ibm.h"
+#include "ultrix.h"
+#include "efi.h"
+#include "karma.h"
+#include "sysv68.h"
+
+int warn_no_part = 1; /*This is ugly: should make genhd removable media aware*/
+
+static int (*check_part[])(struct parsed_partitions *) = {
+        /*
+         * Probe partition formats with tables at disk address 0
+         * that also have an ADFS boot block at 0xdc0.
+         */
+#ifdef CONFIG_ACORN_PARTITION_ICS
+        adfspart_check_ICS,
+#endif
+#ifdef CONFIG_ACORN_PARTITION_POWERTEC
+        adfspart_check_POWERTEC,
+#endif
+#ifdef CONFIG_ACORN_PARTITION_EESOX
+        adfspart_check_EESOX,
+#endif
+
+        /*
+         * Now move on to formats that only have partition info at
+         * disk address 0xdc0.  Since these may also have stale
+         * PC/BIOS partition tables, they need to come before
+         * the msdos entry.
+         */
+#ifdef CONFIG_ACORN_PARTITION_CUMANA
+        adfspart_check_CUMANA,
+#endif
+#ifdef CONFIG_ACORN_PARTITION_ADFS
+        adfspart_check_ADFS,
+#endif
+
+#ifdef CONFIG_EFI_PARTITION
+        efi_partition,          /* this must come before msdos */
+#endif
+#ifdef CONFIG_SGI_PARTITION
+        sgi_partition,
+#endif
+#ifdef CONFIG_LDM_PARTITION
+        ldm_partition,          /* this must come before msdos */
+#endif
+#ifdef CONFIG_MSDOS_PARTITION
+        msdos_partition,
+#endif
+#ifdef CONFIG_OSF_PARTITION
+        osf_partition,
+#endif
+#ifdef CONFIG_SUN_PARTITION
+        sun_partition,
+#endif
+#ifdef CONFIG_AMIGA_PARTITION
+        amiga_partition,
+#endif
+#ifdef CONFIG_ATARI_PARTITION
+        atari_partition,
+#endif
+#ifdef CONFIG_MAC_PARTITION
+        mac_partition,
+#endif
+#ifdef CONFIG_ULTRIX_PARTITION
+        ultrix_partition,
+#endif
+#ifdef CONFIG_IBM_PARTITION
+        ibm_partition,
+#endif
+#ifdef CONFIG_KARMA_PARTITION
+        karma_partition,
+#endif
+#ifdef CONFIG_SYSV68_PARTITION
+        sysv68_partition,
+#endif
+        NULL
+};
+
+struct parsed_partitions *
+check_partition(struct gendisk *hd, struct block_device *bdev)
+{
+        struct parsed_partitions *state;
+        int i, res, err;
+
+        state = kzalloc(sizeof(struct parsed_partitions), GFP_KERNEL);
+        if (!state)
+                return NULL;
+        state->pp_buf = (char *)__get_free_page(GFP_KERNEL);
+        if (!state->pp_buf) {
+                kfree(state);
+                return NULL;
+        }
+        state->pp_buf[0] = '\0';
+
+        state->bdev = bdev;
+        disk_name(hd, 0, state->name);
+        snprintf(state->pp_buf, PAGE_SIZE, " %s:", state->name);
+        if (isdigit(state->name[strlen(state->name)-1]))
+                sprintf(state->name, "p");
+
+        state->limit = disk_max_parts(hd);
+        i = res = err = 0;
+        while (!res && check_part[i]) {
+                memset(&state->parts, 0, sizeof(state->parts));
+                res = check_part[i++](state);
+                if (res < 0) {
+                        /* We have hit an I/O error which we don't report now.
+                        * But record it, and let the others do their job.
+                        */
+                        err = res;
+                        res = 0;
+                }
+
+        }
+        if (res > 0) {
+                printk(KERN_INFO "%s", state->pp_buf);
+
+                free_page((unsigned long)state->pp_buf);
+                return state;
+        }
+        if (state->access_beyond_eod)
+                err = -ENOSPC;
+        if (err)
+        /* The partition is unrecognized. So report I/O errors if there were any */
+                res = err;
+        if (!res)
+                strlcat(state->pp_buf, " unknown partition table\n", PAGE_SIZE);
+        else if (warn_no_part)
+                strlcat(state->pp_buf, " unable to read partition table\n", PAGE_SIZE);
+
+        printk(KERN_INFO "%s", state->pp_buf);
+
+        free_page((unsigned long)state->pp_buf);
+        kfree(state);
+        return ERR_PTR(res);
+}