--- /dev/null
+Forward-port the mdadm tool from the Gentoo Busybox-1.1.3.
+Should handle all types of metadata 0.90, 1.0, 1.1, 1.2.
+If /etc/mdadm.conf does not exist in the initrd, it is created first, by
+scanning devices, and then it is used.
+
+Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
+
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/Config.in busybox-1.7.4+gentoo+mdadm/Config.in
+--- busybox-1.7.4+gentoo/Config.in 2007-09-03 04:48:58.000000000 -0700
++++ busybox-1.7.4+gentoo+mdadm/Config.in 2008-03-11 10:31:00.000000000 -0700
+@@ -499,2 +499,3 @@
+ source e2fsprogs/Config.in
++source mdadm/Config.in
+ source modutils/Config.in
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/include/applets.h busybox-1.7.4+gentoo+mdadm/include/applets.h
+--- busybox-1.7.4+gentoo/include/applets.h 2008-03-11 10:25:43.000000000 -0700
++++ busybox-1.7.4+gentoo+mdadm/include/applets.h 2008-03-11 10:32:22.000000000 -0700
+@@ -223,2 +223,3 @@
+ USE_MD5SUM(APPLET_ODDNAME(md5sum, md5_sha1_sum, _BB_DIR_USR_BIN, _BB_SUID_NEVER, md5sum))
++USE_MDADM(APPLET(mdadm, mdadm_main, _BB_DIR_SBIN, _BB_SUID_NEVER))
+ USE_MDEV(APPLET(mdev, _BB_DIR_SBIN, _BB_SUID_NEVER))
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/include/usage.h busybox-1.7.4+gentoo+mdadm/include/usage.h
+--- busybox-1.7.4+gentoo/include/usage.h 2008-03-11 10:19:04.000000000 -0700
++++ busybox-1.7.4+gentoo+mdadm/include/usage.h 2008-03-11 10:31:00.000000000 -0700
+@@ -2048,2 +2048,7 @@
+
++#define mdadm_trivial_usage \
++ ""
++#define mdadm_full_usage \
++ "Assemble or Examine the mdadm arrays."
++
+ #define mdev_trivial_usage \
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/Makefile busybox-1.7.4+gentoo+mdadm/Makefile
+--- busybox-1.7.4+gentoo/Makefile 2007-11-23 20:34:41.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/Makefile 2008-03-11 10:31:49.000000000 -0700
+@@ -442,6 +442,7 @@
+ libpwdgrp/ \
+ loginutils/ \
+ miscutils/ \
++ mdadm/ \
+ modutils/ \
+ networking/ \
+ networking/libiproute/ \
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/bitmap.h busybox-1.7.4+gentoo+mdadm/mdadm/bitmap.h
+--- busybox-1.7.4+gentoo/mdadm/bitmap.h 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/bitmap.h 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,287 @@
++/*
++ * bitmap.h: Copyright (C) Peter T. Breuer (ptb@ot.uc3m.es) 2003
++ *
++ * additions: Copyright (C) 2003-2004, Paul Clements, SteelEye Technology, Inc.
++ */
++#ifndef BITMAP_H
++#define BITMAP_H 1
++
++#define BITMAP_MAJOR_LO 3
++/* version 4 insists the bitmap is in little-endian order
++ * with version 3, it is host-endian which is non-portable
++ */
++#define BITMAP_MAJOR_HI 4
++#define BITMAP_MAJOR_HOSTENDIAN 3
++
++#define BITMAP_MINOR 39
++
++/*
++ * in-memory bitmap:
++ *
++ * Use 16 bit block counters to track pending writes to each "chunk".
++ * The 2 high order bits are special-purpose, the first is a flag indicating
++ * whether a resync is needed. The second is a flag indicating whether a
++ * resync is active.
++ * This means that the counter is actually 14 bits:
++ *
++ * +--------+--------+------------------------------------------------+
++ * | resync | resync | counter |
++ * | needed | active | |
++ * | (0-1) | (0-1) | (0-16383) |
++ * +--------+--------+------------------------------------------------+
++ *
++ * The "resync needed" bit is set when:
++ * a '1' bit is read from storage at startup.
++ * a write request fails on some drives
++ * a resync is aborted on a chunk with 'resync active' set
++ * It is cleared (and resync-active set) when a resync starts across all drives
++ * of the chunk.
++ *
++ *
++ * The "resync active" bit is set when:
++ * a resync is started on all drives, and resync_needed is set.
++ * resync_needed will be cleared (as long as resync_active wasn't already set).
++ * It is cleared when a resync completes.
++ *
++ * The counter counts pending write requests, plus the on-disk bit.
++ * When the counter is '1' and the resync bits are clear, the on-disk
++ * bit can be cleared aswell, thus setting the counter to 0.
++ * When we set a bit, or in the counter (to start a write), if the fields is
++ * 0, we first set the disk bit and set the counter to 1.
++ *
++ * If the counter is 0, the on-disk bit is clear and the stipe is clean
++ * Anything that dirties the stipe pushes the counter to 2 (at least)
++ * and sets the on-disk bit (lazily).
++ * If a periodic sweep find the counter at 2, it is decremented to 1.
++ * If the sweep find the counter at 1, the on-disk bit is cleared and the
++ * counter goes to zero.
++ *
++ * Also, we'll hijack the "map" pointer itself and use it as two 16 bit block
++ * counters as a fallback when "page" memory cannot be allocated:
++ *
++ * Normal case (page memory allocated):
++ *
++ * page pointer (32-bit)
++ *
++ * [ ] ------+
++ * |
++ * +-------> [ ][ ]..[ ] (4096 byte page == 2048 counters)
++ * c1 c2 c2048
++ *
++ * Hijacked case (page memory allocation failed):
++ *
++ * hijacked page pointer (32-bit)
++ *
++ * [ ][ ] (no page memory allocated)
++ * counter #1 (16-bit) counter #2 (16-bit)
++ *
++ */
++
++#ifdef __KERNEL__
++
++#define PAGE_BITS (PAGE_SIZE << 3)
++#define PAGE_BIT_SHIFT (PAGE_SHIFT + 3)
++
++typedef __u16 bitmap_counter_t;
++#define COUNTER_BITS 16
++#define COUNTER_BIT_SHIFT 4
++#define COUNTER_BYTE_RATIO (COUNTER_BITS / 8)
++#define COUNTER_BYTE_SHIFT (COUNTER_BIT_SHIFT - 3)
++
++#define NEEDED_MASK ((bitmap_counter_t) (1 << (COUNTER_BITS - 1)))
++#define RESYNC_MASK ((bitmap_counter_t) (1 << (COUNTER_BITS - 2)))
++#define COUNTER_MAX ((bitmap_counter_t) RESYNC_MASK - 1)
++#define NEEDED(x) (((bitmap_counter_t) x) & NEEDED_MASK)
++#define RESYNC(x) (((bitmap_counter_t) x) & RESYNC_MASK)
++#define COUNTER(x) (((bitmap_counter_t) x) & COUNTER_MAX)
++
++/* how many counters per page? */
++#define PAGE_COUNTER_RATIO (PAGE_BITS / COUNTER_BITS)
++/* same, except a shift value for more efficient bitops */
++#define PAGE_COUNTER_SHIFT (PAGE_BIT_SHIFT - COUNTER_BIT_SHIFT)
++/* same, except a mask value for more efficient bitops */
++#define PAGE_COUNTER_MASK (PAGE_COUNTER_RATIO - 1)
++
++#define BITMAP_BLOCK_SIZE 512
++#define BITMAP_BLOCK_SHIFT 9
++
++/* how many blocks per chunk? (this is variable) */
++#define CHUNK_BLOCK_RATIO(bitmap) ((bitmap)->chunksize >> BITMAP_BLOCK_SHIFT)
++#define CHUNK_BLOCK_SHIFT(bitmap) ((bitmap)->chunkshift - BITMAP_BLOCK_SHIFT)
++#define CHUNK_BLOCK_MASK(bitmap) (CHUNK_BLOCK_RATIO(bitmap) - 1)
++
++/* when hijacked, the counters and bits represent even larger "chunks" */
++/* there will be 1024 chunks represented by each counter in the page pointers */
++#define PAGEPTR_BLOCK_RATIO(bitmap) \
++ (CHUNK_BLOCK_RATIO(bitmap) << PAGE_COUNTER_SHIFT >> 1)
++#define PAGEPTR_BLOCK_SHIFT(bitmap) \
++ (CHUNK_BLOCK_SHIFT(bitmap) + PAGE_COUNTER_SHIFT - 1)
++#define PAGEPTR_BLOCK_MASK(bitmap) (PAGEPTR_BLOCK_RATIO(bitmap) - 1)
++
++/*
++ * on-disk bitmap:
++ *
++ * Use one bit per "chunk" (block set). We do the disk I/O on the bitmap
++ * file a page at a time. There's a superblock at the start of the file.
++ */
++
++/* map chunks (bits) to file pages - offset by the size of the superblock */
++#define CHUNK_BIT_OFFSET(chunk) ((chunk) + (sizeof(bitmap_super_t) << 3))
++
++#endif
++
++/*
++ * bitmap structures:
++ */
++
++#define BITMAP_MAGIC 0x6d746962
++
++/* use these for bitmap->flags and bitmap->sb->state bit-fields */
++enum bitmap_state {
++ BITMAP_ACTIVE = 0x001, /* the bitmap is in use */
++ BITMAP_STALE = 0x002 /* the bitmap file is out of date or had -EIO */
++};
++
++/* the superblock at the front of the bitmap file -- little endian */
++typedef struct bitmap_super_s {
++ __u32 magic; /* 0 BITMAP_MAGIC */
++ __u32 version; /* 4 the bitmap major for now, could change... */
++ __u8 uuid[16]; /* 8 128 bit uuid - must match md device uuid */
++ __u64 events; /* 24 event counter for the bitmap (1)*/
++ __u64 events_cleared;/*32 event counter when last bit cleared (2) */
++ __u64 sync_size; /* 40 the size of the md device's sync range(3) */
++ __u32 state; /* 48 bitmap state information */
++ __u32 chunksize; /* 52 the bitmap chunk size in bytes */
++ __u32 daemon_sleep; /* 56 seconds between disk flushes */
++ __u32 write_behind; /* 60 number of outstanding write-behind writes */
++
++ __u8 pad[256 - 64]; /* set to zero */
++} bitmap_super_t;
++
++/* notes:
++ * (1) This event counter is updated before the eventcounter in the md superblock
++ * When a bitmap is loaded, it is only accepted if this event counter is equal
++ * to, or one greater than, the event counter in the superblock.
++ * (2) This event counter is updated when the other one is *if*and*only*if* the
++ * array is not degraded. As bits are not cleared when the array is degraded,
++ * this represents the last time that any bits were cleared.
++ * If a device is being added that has an event count with this value or
++ * higher, it is accepted as conforming to the bitmap.
++ * (3)This is the number of sectors represented by the bitmap, and is the range that
++ * resync happens across. For raid1 and raid5/6 it is the size of individual
++ * devices. For raid10 it is the size of the array.
++ */
++
++#ifdef __KERNEL__
++
++/* the in-memory bitmap is represented by bitmap_pages */
++struct bitmap_page {
++ /*
++ * map points to the actual memory page
++ */
++ char *map;
++ /*
++ * in emergencies (when map cannot be alloced), hijack the map
++ * pointer and use it as two counters itself
++ */
++ unsigned int hijacked;
++ /*
++ * count of dirty bits on the page
++ */
++ int count;
++};
++
++/* keep track of bitmap file pages that have pending writes on them */
++struct page_list {
++ struct list_head list;
++ struct page *page;
++};
++
++/* the main bitmap structure - one per mddev */
++struct bitmap {
++ struct bitmap_page *bp;
++ unsigned long pages; /* total number of pages in the bitmap */
++ unsigned long missing_pages; /* number of pages not yet allocated */
++
++ mddev_t *mddev; /* the md device that the bitmap is for */
++
++ int counter_bits; /* how many bits per block counter */
++
++ /* bitmap chunksize -- how much data does each bit represent? */
++ unsigned long chunksize;
++ unsigned long chunkshift; /* chunksize = 2^chunkshift (for bitops) */
++ unsigned long chunks; /* total number of data chunks for the array */
++
++ /* We hold a count on the chunk currently being synced, and drop
++ * it when the last block is started. If the resync is aborted
++ * midway, we need to be able to drop that count, so we remember
++ * the counted chunk..
++ */
++ unsigned long syncchunk;
++
++ __u64 events_cleared;
++
++ /* bitmap spinlock */
++ spinlock_t lock;
++
++ struct file *file; /* backing disk file */
++ struct page *sb_page; /* cached copy of the bitmap file superblock */
++ struct page **filemap; /* list of cache pages for the file */
++ unsigned long *filemap_attr; /* attributes associated w/ filemap pages */
++ unsigned long file_pages; /* number of pages in the file */
++
++ unsigned long flags;
++
++ /*
++ * the bitmap daemon - periodically wakes up and sweeps the bitmap
++ * file, cleaning up bits and flushing out pages to disk as necessary
++ */
++ mdk_thread_t *daemon;
++ unsigned long daemon_sleep; /* how many seconds between updates? */
++
++ /*
++ * bitmap write daemon - this daemon performs writes to the bitmap file
++ * this thread is only needed because of a limitation in ext3 (jbd)
++ * that does not allow a task to have two journal transactions ongoing
++ * simultaneously (even if the transactions are for two different
++ * filesystems) -- in the case of bitmap, that would be the filesystem
++ * that the bitmap file resides on and the filesystem that is mounted
++ * on the md device -- see current->journal_info in jbd/transaction.c
++ */
++ mdk_thread_t *write_daemon;
++ mdk_thread_t *writeback_daemon;
++ spinlock_t write_lock;
++ struct semaphore write_ready;
++ struct semaphore write_done;
++ unsigned long writes_pending;
++ wait_queue_head_t write_wait;
++ struct list_head write_pages;
++ struct list_head complete_pages;
++ mempool_t *write_pool;
++};
++
++/* the bitmap API */
++
++/* these are used only by md/bitmap */
++int bitmap_create(mddev_t *mddev);
++void bitmap_destroy(mddev_t *mddev);
++int bitmap_active(struct bitmap *bitmap);
++
++char *file_path(struct file *file, char *buf, int count);
++void bitmap_print_sb(struct bitmap *bitmap);
++int bitmap_update_sb(struct bitmap *bitmap);
++
++int bitmap_setallbits(struct bitmap *bitmap);
++
++/* these are exported */
++void bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sectors);
++void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long sectors,
++ int success);
++int bitmap_start_sync(struct bitmap *bitmap, sector_t offset, int *blocks);
++void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, int *blocks, int aborted);
++void bitmap_close_sync(struct bitmap *bitmap);
++
++int bitmap_unplug(struct bitmap *bitmap);
++#endif
++
++#endif
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/config.c busybox-1.7.4+gentoo+mdadm/mdadm/config.c
+--- busybox-1.7.4+gentoo/mdadm/config.c 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/config.c 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,824 @@
++/*
++ * mdadm - manage Linux "md" devices aka RAID arrays.
++ *
++ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Author: Neil Brown
++ * Email: <neilb@cse.unsw.edu.au>
++ * Paper: Neil Brown
++ * School of Computer Science and Engineering
++ * The University of New South Wales
++ * Sydney, 2052
++ * Australia
++ */
++
++#include "mdadm.h"
++#include "dlink.h"
++#include <sys/dir.h>
++#include <glob.h>
++#include <fnmatch.h>
++#include <ctype.h>
++#include <pwd.h>
++#include <grp.h>
++
++mapping_t r5layout[] = {
++ { "left-asymmetric", 0},
++ { "right-asymmetric", 1},
++ { "left-symmetric", 2},
++ { "right-symmetric", 3},
++
++ { "default", 2},
++ { "la", 0},
++ { "ra", 1},
++ { "ls", 2},
++ { "rs", 3},
++ { NULL, 0}
++};
++
++mapping_t pers[] = {
++ { "linear", -1},
++ { "raid0", 0},
++ { "0", 0},
++ { "stripe", 0},
++ { "raid1", 1},
++ { "1", 1},
++ { "mirror", 1},
++ { "raid4", 4},
++ { "4", 4},
++ { "raid5", 5},
++ { "5", 5},
++ { "multipath", -4},
++ { "mp", -4},
++ { "raid6", 6},
++ { "6", 6},
++ { "raid10", 10},
++ { "10", 10},
++ { "faulty", -5},
++ { NULL, 0}
++};
++/*
++ * Read the config file
++ *
++ * conf_get_uuids gets a list of devicename+uuid pairs
++ * conf_get_devs gets device names after expanding wildcards
++ *
++ * Each keeps the returned list and frees it when asked to make
++ * a new list.
++ *
++ * The format of the config file needs to be fairly extensible.
++ * Now, arrays only have names and uuids and devices merely are.
++ * But later arrays might want names, and devices might want superblock
++ * versions, and who knows what else.
++ * I like free format, abhore backslash line continuation, adore
++ * indentation for structure and am ok about # comments.
++ *
++ * So, each line that isn't blank or a #comment must either start
++ * with a key word, and not be indented, or must start with a
++ * non-key-word and must be indented.
++ *
++ * Keywords are DEVICE and ARRAY
++ * DEV{ICE} introduces some devices that might contain raid components.
++ * e.g.
++ * DEV style=0 /dev/sda* /dev/hd*
++ * DEV style=1 /dev/sd[b-f]*
++ * ARR{AY} describes an array giving md device and attributes like uuid=whatever
++ * e.g.
++ * ARRAY /dev/md0 uuid=whatever name=something
++ * Spaces separate words on each line. Quoting, with "" or '' protects them,
++ * but may not wrap over lines
++ *
++ */
++
++#ifndef CONFFILE
++#define CONFFILE "/etc/mdadm.conf"
++#endif
++#ifndef CONFFILE2
++/* for Debian compatibility .... */
++#define CONFFILE2 "/etc/mdadm/mdadm.conf"
++#endif
++char DefaultConfFile[] = CONFFILE;
++char DefaultAltConfFile[] = CONFFILE2;
++
++enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev, Homehost, LTEnd };
++char *keywords[] = {
++ [Devices] = "devices",
++ [Array] = "array",
++ [Mailaddr] = "mailaddr",
++ [Mailfrom] = "mailfrom",
++ [Program] = "program",
++ [CreateDev]= "create",
++ [Homehost] = "homehost",
++ [LTEnd] = NULL
++};
++
++/*
++ * match_keyword returns an index into the keywords array, or -1 for no match
++ * case is ignored, and at least three characters must be given
++ */
++
++int match_keyword(char *word)
++{
++ int len = strlen(word);
++ int n;
++
++ if (len < 3) return -1;
++ for (n=0; keywords[n]; n++) {
++ if (strncasecmp(word, keywords[n], len)==0)
++ return n;
++ }
++ return -1;
++}
++
++/* conf_word gets one word from the conf file.
++ * if "allow_key", then accept words at the start of a line,
++ * otherwise stop when such a word is found.
++ * We assume that the file pointer is at the end of a word, so the
++ * next character is a space, or a newline. If not, it is the start of a line.
++ */
++
++char *conf_word(FILE *file, int allow_key)
++{
++ int wsize = 100;
++ int len = 0;
++ int c;
++ int quote;
++ int wordfound = 0;
++ char *word = malloc(wsize);
++
++ if (!word) abort();
++
++ while (wordfound==0) {
++ /* at the end of a word.. */
++ c = getc(file);
++ if (c == '#')
++ while (c != EOF && c != '\n')
++ c = getc(file);
++ if (c == EOF) break;
++ if (c == '\n') continue;
++
++ if (c != ' ' && c != '\t' && ! allow_key) {
++ ungetc(c, file);
++ break;
++ }
++ /* looks like it is safe to get a word here, if there is one */
++ quote = 0;
++ /* first, skip any spaces */
++ while (c == ' ' || c == '\t')
++ c = getc(file);
++ if (c != EOF && c != '\n' && c != '#') {
++ /* we really have a character of a word, so start saving it */
++ while (c != EOF && c != '\n' && (quote || (c!=' ' && c != '\t'))) {
++ wordfound = 1;
++ if (quote && c == quote) quote = 0;
++ else if (quote == 0 && (c == '\'' || c == '"'))
++ quote = c;
++ else {
++ if (len == wsize-1) {
++ wsize += 100;
++ word = realloc(word, wsize);
++ if (!word) abort();
++ }
++ word[len++] = c;
++ }
++ c = getc(file);
++ }
++ }
++ if (c != EOF) ungetc(c, file);
++ }
++ word[len] = 0;
++/* printf("word is <%s>\n", word); */
++ if (!wordfound) {
++ free(word);
++ word = NULL;
++ }
++ return word;
++}
++
++/*
++ * conf_line reads one logical line from the conffile.
++ * It skips comments and continues until it finds a line that starts
++ * with a non blank/comment. This character is pushed back for the next call
++ * A doubly linked list of words is returned.
++ * the first word will be a keyword. Other words will have had quotes removed.
++ */
++
++char *conf_line(FILE *file)
++{
++ char *w;
++ char *list;
++
++ w = conf_word(file, 1);
++ if (w == NULL) return NULL;
++
++ list = dl_strdup(w);
++ free(w);
++ dl_init(list);
++
++ while ((w = conf_word(file,0))){
++ char *w2 = dl_strdup(w);
++ free(w);
++ dl_add(list, w2);
++ }
++/* printf("got a line\n");*/
++ return list;
++}
++
++void free_line(char *line)
++{
++ char *w;
++ for (w=dl_next(line); w != line; w=dl_next(line)) {
++ dl_del(w);
++ dl_free(w);
++ }
++ dl_free(line);
++}
++
++
++struct conf_dev {
++ struct conf_dev *next;
++ char *name;
++} *cdevlist = NULL;
++
++mddev_dev_t load_partitions(void)
++{
++ FILE *f = fopen("/proc/partitions", "r");
++ char buf[1024];
++ mddev_dev_t rv = NULL;
++ if (f == NULL) {
++ fprintf(stderr, Name ": cannot open /proc/partitions\n");
++ return NULL;
++ }
++ while (fgets(buf, 1024, f)) {
++ int major, minor;
++ char *name, *mp;
++ mddev_dev_t d;
++
++ buf[1023] = '\0';
++ if (buf[0] != ' ')
++ continue;
++ major = strtoul(buf, &mp, 10);
++ if (mp == buf || *mp != ' ')
++ continue;
++ minor = strtoul(mp, NULL, 10);
++
++ name = map_dev(major, minor, 1);
++ if (!name)
++ continue;
++ d = malloc(sizeof(*d));
++ d->devname = strdup(name);
++ d->next = rv;
++ d->used = 0;
++ rv = d;
++ }
++ fclose(f);
++ return rv;
++}
++
++struct createinfo createinfo = {
++ .autof = 2, /* by default, create devices with standard names */
++ .symlinks = 1,
++#ifdef DEBIAN
++ .gid = 6, /* disk */
++ .mode = 0660,
++#else
++ .mode = 0600,
++#endif
++};
++
++int parse_auto(char *str, char *msg, int config)
++{
++ int autof;
++ if (str == NULL || *str == 0)
++ autof = 2;
++ else if (strcasecmp(str,"no")==0)
++ autof = 1;
++ else if (strcasecmp(str,"yes")==0)
++ autof = 2;
++ else if (strcasecmp(str,"md")==0)
++ autof = config?5:3;
++ else {
++ /* There might be digits, and maybe a hypen, at the end */
++ char *e = str + strlen(str);
++ int num = 4;
++ int len;
++ while (e > str && isdigit(e[-1]))
++ e--;
++ if (*e) {
++ num = atoi(e);
++ if (num <= 0) num = 1;
++ }
++ if (e > str && e[-1] == '-')
++ e--;
++ len = e - str;
++ if ((len == 2 && strncasecmp(str,"md",2)==0)) {
++ autof = config ? 5 : 3;
++ } else if ((len == 3 && strncasecmp(str,"yes",3)==0)) {
++ autof = 2;
++ } else if ((len == 3 && strncasecmp(str,"mdp",3)==0)) {
++ autof = config ? 6 : 4;
++ } else if ((len == 1 && strncasecmp(str,"p",1)==0) ||
++ (len >= 4 && strncasecmp(str,"part",4)==0)) {
++ autof = 6;
++ } else {
++ fprintf(stderr, Name ": %s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
++ " optionally followed by a number.\n",
++ msg, str);
++ exit(2);
++ }
++ autof |= num << 3;
++ }
++ return autof;
++}
++
++static void createline(char *line)
++{
++ char *w;
++ char *ep;
++
++ for (w=dl_next(line); w!=line; w=dl_next(w)) {
++ if (strncasecmp(w, "auto=", 5) == 0)
++ createinfo.autof = parse_auto(w+5, "auto=", 1);
++ else if (strncasecmp(w, "owner=", 6) == 0) {
++ if (w[6] == 0) {
++ fprintf(stderr, Name ": missing owner name\n");
++ continue;
++ }
++ createinfo.uid = strtoul(w+6, &ep, 10);
++ if (*ep != 0) {
++ struct passwd *pw;
++ /* must be a name */
++ pw = getpwnam(w+6);
++ if (pw)
++ createinfo.uid = pw->pw_uid;
++ else
++ fprintf(stderr, Name ": CREATE user %s not found\n", w+6);
++ }
++ } else if (strncasecmp(w, "group=", 6) == 0) {
++ if (w[6] == 0) {
++ fprintf(stderr, Name ": missing group name\n");
++ continue;
++ }
++ createinfo.gid = strtoul(w+6, &ep, 10);
++ if (*ep != 0) {
++ struct group *gr;
++ /* must be a name */
++ gr = getgrnam(w+6);
++ if (gr)
++ createinfo.gid = gr->gr_gid;
++ else
++ fprintf(stderr, Name ": CREATE group %s not found\n", w+6);
++ }
++ } else if (strncasecmp(w, "mode=", 5) == 0) {
++ if (w[5] == 0) {
++ fprintf(stderr, Name ": missing CREATE mode\n");
++ continue;
++ }
++ createinfo.mode = strtoul(w+5, &ep, 8);
++ if (*ep != 0) {
++ createinfo.mode = 0600;
++ fprintf(stderr, Name ": unrecognised CREATE mode %s\n",
++ w+5);
++ }
++ } else if (strncasecmp(w, "metadata=", 9) == 0) {
++ /* style of metadata to use by default */
++ int i;
++ for (i=0; superlist[i] && !createinfo.supertype; i++)
++ createinfo.supertype =
++ superlist[i]->match_metadata_desc(w+9);
++ if (!createinfo.supertype)
++ fprintf(stderr, Name ": metadata format %s unknown, ignoring\n",
++ w+9);
++ } else if (strncasecmp(w, "symlinks=yes", 12) == 0)
++ createinfo.symlinks = 1;
++ else if (strncasecmp(w, "symlinks=no", 11) == 0)
++ createinfo.symlinks = 0;
++ else {
++ fprintf(stderr, Name ": unrecognised word on CREATE line: %s\n",
++ w);
++ }
++ }
++}
++
++void devline(char *line)
++{
++ char *w;
++ struct conf_dev *cd;
++
++ for (w=dl_next(line); w != line; w=dl_next(w)) {
++ if (w[0] == '/' || strcasecmp(w, "partitions") == 0) {
++ cd = malloc(sizeof(*cd));
++ cd->name = strdup(w);
++ cd->next = cdevlist;
++ cdevlist = cd;
++ } else {
++ fprintf(stderr, Name ": unreconised word on DEVICE line: %s\n",
++ w);
++ }
++ }
++}
++
++mddev_ident_t mddevlist = NULL;
++mddev_ident_t *mddevlp = &mddevlist;
++
++void arrayline(char *line)
++{
++ char *w;
++
++ struct mddev_ident_s mis;
++ mddev_ident_t mi;
++
++ mis.uuid_set = 0;
++ mis.super_minor = UnSet;
++ mis.level = UnSet;
++ mis.raid_disks = UnSet;
++ mis.spare_disks = 0;
++ mis.devices = NULL;
++ mis.devname = NULL;
++ mis.spare_group = NULL;
++ mis.autof = 0;
++ mis.next = NULL;
++ mis.st = NULL;
++ mis.bitmap_fd = -1;
++ mis.bitmap_file = NULL;
++ mis.name[0] = 0;
++
++ for (w=dl_next(line); w!=line; w=dl_next(w)) {
++ if (w[0] == '/') {
++ if (mis.devname)
++ fprintf(stderr, Name ": only give one device per ARRAY line: %s and %s\n",
++ mis.devname, w);
++ else mis.devname = w;
++ } else if (strncasecmp(w, "uuid=", 5)==0 ) {
++ if (mis.uuid_set)
++ fprintf(stderr, Name ": only specify uuid once, %s ignored.\n",
++ w);
++ else {
++ if (parse_uuid(w+5, mis.uuid))
++ mis.uuid_set = 1;
++ else
++ fprintf(stderr, Name ": bad uuid: %s\n", w);
++ }
++ } else if (strncasecmp(w, "super-minor=", 12)==0 ) {
++ if (mis.super_minor != UnSet)
++ fprintf(stderr, Name ": only specify super-minor once, %s ignored.\n",
++ w);
++ else {
++ char *endptr;
++ mis.super_minor= strtol(w+12, &endptr, 10);
++ if (w[12]==0 || endptr[0]!=0 || mis.super_minor < 0) {
++ fprintf(stderr, Name ": invalid super-minor number: %s\n",
++ w);
++ mis.super_minor = UnSet;
++ }
++ }
++ } else if (strncasecmp(w, "name=", 5)==0) {
++ if (mis.name[0])
++ fprintf(stderr, Name ": only specify name once, %s ignored.\n",
++ w);
++ else if (strlen(w+5) > 32)
++ fprintf(stderr, Name ": name too long, ignoring %s\n", w);
++ else
++ strcpy(mis.name, w+5);
++
++ } else if (strncasecmp(w, "bitmap=", 7) == 0) {
++ if (mis.bitmap_file)
++ fprintf(stderr, Name ": only specify bitmap file once. %s ignored\n",
++ w);
++ else
++ mis.bitmap_file = strdup(w+7);
++
++ } else if (strncasecmp(w, "devices=", 8 ) == 0 ) {
++ if (mis.devices)
++ fprintf(stderr, Name ": only specify devices once (use a comma separated list). %s ignored\n",
++ w);
++ else
++ mis.devices = strdup(w+8);
++ } else if (strncasecmp(w, "spare-group=", 12) == 0 ) {
++ if (mis.spare_group)
++ fprintf(stderr, Name ": only specify one spare group per array. %s ignored.\n",
++ w);
++ else
++ mis.spare_group = strdup(w+12);
++ } else if (strncasecmp(w, "level=", 6) == 0 ) {
++ /* this is mainly for compatability with --brief output */
++ mis.level = map_name(pers, w+6);
++ } else if (strncasecmp(w, "disks=", 6) == 0 ) {
++ /* again, for compat */
++ mis.raid_disks = atoi(w+6);
++ } else if (strncasecmp(w, "num-devices=", 12) == 0 ) {
++ /* again, for compat */
++ mis.raid_disks = atoi(w+12);
++ } else if (strncasecmp(w, "spares=", 7) == 0 ) {
++ /* for warning if not all spares present */
++ mis.spare_disks = atoi(w+7);
++ } else if (strncasecmp(w, "metadata=", 9) == 0) {
++ /* style of metadata on the devices. */
++ int i;
++
++ for(i=0; superlist[i] && !mis.st; i++)
++ mis.st = superlist[i]->match_metadata_desc(w+9);
++
++ if (!mis.st)
++ fprintf(stderr, Name ": metadata format %s unknown, ignored.\n", w+9);
++ } else if (strncasecmp(w, "auto=", 5) == 0 ) {
++ /* whether to create device special files as needed */
++ mis.autof = parse_auto(w+5, "auto type", 0);
++ } else {
++ fprintf(stderr, Name ": unrecognised word on ARRAY line: %s\n",
++ w);
++ }
++ }
++ if (mis.devname == NULL)
++ fprintf(stderr, Name ": ARRAY line with no device\n");
++ else if (mis.uuid_set == 0 && mis.devices == NULL && mis.super_minor == UnSet && mis.name[0] == 0)
++ fprintf(stderr, Name ": ARRAY line %s has no identity information.\n", mis.devname);
++ else {
++ mi = malloc(sizeof(*mi));
++ *mi = mis;
++ mi->devname = strdup(mis.devname);
++ mi->next = NULL;
++ *mddevlp = mi;
++ mddevlp = &mi->next;
++ }
++}
++
++static char *alert_email = NULL;
++void mailline(char *line)
++{
++ char *w;
++
++ for (w=dl_next(line); w != line ; w=dl_next(w)) {
++ if (alert_email == NULL)
++ alert_email = strdup(w);
++ else
++ fprintf(stderr, Name ": excess address on MAIL line: %s - ignored\n",
++ w);
++ }
++}
++
++static char *alert_mail_from = NULL;
++void mailfromline(char *line)
++{
++ char *w;
++
++ for (w=dl_next(line); w != line ; w=dl_next(w)) {
++ if (alert_mail_from == NULL)
++ alert_mail_from = strdup(w);
++ else {
++ char *t= NULL;
++ asprintf(&t, "%s %s", alert_mail_from, w);
++ free(alert_mail_from);
++ alert_mail_from = t;
++ }
++ }
++}
++
++
++static char *alert_program = NULL;
++void programline(char *line)
++{
++ char *w;
++
++ for (w=dl_next(line); w != line ; w=dl_next(w)) {
++ if (alert_program == NULL)
++ alert_program = strdup(w);
++ else
++ fprintf(stderr, Name ": excess program on PROGRAM line: %s - ignored\n",
++ w);
++ }
++}
++
++static char *home_host = NULL;
++void homehostline(char *line)
++{
++ char *w;
++
++ for (w=dl_next(line); w != line ; w=dl_next(w)) {
++ if (home_host == NULL)
++ home_host = strdup(w);
++ else
++ fprintf(stderr, Name ": excess host name on HOMEHOST line: %s - ignored\n",
++ w);
++ }
++}
++
++
++int loaded = 0;
++
++static char *conffile = NULL;
++void set_conffile(char *file)
++{
++ conffile = file;
++}
++
++void load_conffile(void)
++{
++ FILE *f;
++ char *line;
++
++ if (loaded) return;
++ if (conffile == NULL)
++ conffile = DefaultConfFile;
++
++ if (strcmp(conffile, "none") == 0) {
++ loaded = 1;
++ return;
++ }
++ if (strcmp(conffile, "partitions")==0) {
++ char *list = dl_strdup("DEV");
++ dl_init(list);
++ dl_add(list, dl_strdup("partitions"));
++ devline(list);
++ free_line(list);
++ loaded = 1;
++ return;
++ }
++ f = fopen(conffile, "r");
++ /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
++ * To allow Debian users to compile from clean source and still
++ * have a working mdadm, we read /etc/mdadm/mdadm.conf
++ * if /etc/mdadm.conf doesn't exist
++ */
++ if (f == NULL &&
++ conffile == DefaultConfFile) {
++ f = fopen(DefaultAltConfFile, "r");
++ if (f)
++ conffile = DefaultAltConfFile;
++ }
++ if (f == NULL)
++ return;
++
++ loaded = 1;
++ while ((line=conf_line(f))) {
++ switch(match_keyword(line)) {
++ case Devices:
++ devline(line);
++ break;
++ case Array:
++ arrayline(line);
++ break;
++ case Mailaddr:
++ mailline(line);
++ break;
++ case Mailfrom:
++ mailfromline(line);
++ break;
++ case Program:
++ programline(line);
++ break;
++ case CreateDev:
++ createline(line);
++ break;
++ case Homehost:
++ homehostline(line);
++ break;
++ default:
++ fprintf(stderr, Name ": Unknown keyword %s\n", line);
++ }
++ free_line(line);
++ }
++
++ fclose(f);
++
++/* printf("got file\n"); */
++}
++
++char *conf_get_mailaddr(void)
++{
++ load_conffile();
++ return alert_email;
++}
++
++char *conf_get_mailfrom(void)
++{
++ load_conffile();
++ return alert_mail_from;
++}
++
++char *conf_get_program(void)
++{
++ load_conffile();
++ return alert_program;
++}
++
++char *conf_get_homehost(void)
++{
++ load_conffile();
++ return home_host;
++}
++
++struct createinfo *conf_get_create_info(void)
++{
++ load_conffile();
++ return &createinfo;
++}
++
++mddev_ident_t conf_get_ident(char *dev)
++{
++ mddev_ident_t rv;
++ load_conffile();
++ rv = mddevlist;
++ while (dev && rv && strcmp(dev, rv->devname)!=0)
++ rv = rv->next;
++ return rv;
++}
++
++mddev_dev_t conf_get_devs()
++{
++ glob_t globbuf;
++ struct conf_dev *cd;
++ int flags = 0;
++ static mddev_dev_t dlist = NULL;
++ unsigned int i;
++
++ while (dlist) {
++ mddev_dev_t t = dlist;
++ dlist = dlist->next;
++ free(t->devname);
++ free(t);
++ }
++
++ load_conffile();
++
++ if (cdevlist == NULL)
++ /* default to 'partitions */
++ dlist = load_partitions();
++
++ for (cd=cdevlist; cd; cd=cd->next) {
++ if (strcasecmp(cd->name, "partitions")==0 && dlist == NULL)
++ dlist = load_partitions();
++ else {
++ glob(cd->name, flags, NULL, &globbuf);
++ flags |= GLOB_APPEND;
++ }
++ }
++ if (flags & GLOB_APPEND) {
++ for (i=0; i<globbuf.gl_pathc; i++) {
++ mddev_dev_t t = malloc(sizeof(*t));
++ t->devname = strdup(globbuf.gl_pathv[i]);
++ t->next = dlist;
++ t->used = 0;
++ dlist = t;
++/* printf("one dev is %s\n", t->devname);*/
++ }
++ globfree(&globbuf);
++ }
++
++ return dlist;
++}
++
++int conf_test_dev(char *devname)
++{
++ struct conf_dev *cd;
++ if (cdevlist == NULL)
++ /* allow anything by default */
++ return 1;
++ for (cd = cdevlist ; cd ; cd = cd->next) {
++ if (strcasecmp(cd->name, "partitions") == 0)
++ return 1;
++ if (fnmatch(cd->name, devname, FNM_PATHNAME) == 0)
++ return 1;
++ }
++ return 0;
++}
++
++
++int match_oneof(char *devices, char *devname)
++{
++ /* check if one of the comma separated patterns in devices
++ * matches devname
++ */
++
++
++ while (devices && *devices) {
++ char patn[1024];
++ char *p = devices;
++ devices = strchr(devices, ',');
++ if (!devices)
++ devices = p + strlen(p);
++ if (devices-p < 1024) {
++ strncpy(patn, p, devices-p);
++ patn[devices-p] = 0;
++ if (fnmatch(patn, devname, FNM_PATHNAME)==0)
++ return 1;
++ }
++ if (*devices == ',')
++ devices++;
++ }
++ return 0;
++}
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/Config.in busybox-1.7.4+gentoo+mdadm/mdadm/Config.in
+--- busybox-1.7.4+gentoo/mdadm/Config.in 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/Config.in 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,15 @@
++#
++# For a description of the syntax of this configuration file,
++# see scripts/kbuild/config-language.txt.
++#
++
++menu "Linux mdadm Utilities"
++
++config CONFIG_MDADM
++ bool "mdadm"
++ default n
++ help
++ assemble or examine raid array
++
++endmenu
++
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/dlink.c busybox-1.7.4+gentoo+mdadm/mdadm/dlink.c
+--- busybox-1.7.4+gentoo/mdadm/dlink.c 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/dlink.c 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,79 @@
++
++/* doubly linked lists */
++/* This is free software. No strings attached. No copyright claimed */
++
++#include <unistd.h>
++#include <stdlib.h>
++#include <string.h>
++#ifdef __dietlibc__
++char *strncpy(char *dest, const char *src, size_t n) __THROW;
++#endif
++#include "dlink.h"
++
++
++void *dl_head()
++{
++ void *h;
++ h = dl_alloc(0);
++ dl_next(h) = h;
++ dl_prev(h) = h;
++ return h;
++}
++
++void dl_free(void *v)
++{
++ struct __dl_head *vv = v;
++ free(vv-1);
++}
++
++void dl_init(void *v)
++{
++ dl_next(v) = v;
++ dl_prev(v) = v;
++}
++
++void dl_insert(void *head, void *val)
++{
++ dl_next(val) = dl_next(head);
++ dl_prev(val) = head;
++ dl_next(dl_prev(val)) = val;
++ dl_prev(dl_next(val)) = val;
++}
++
++void dl_add(void *head, void *val)
++{
++ dl_prev(val) = dl_prev(head);
++ dl_next(val) = head;
++ dl_next(dl_prev(val)) = val;
++ dl_prev(dl_next(val)) = val;
++}
++
++void dl_del(void *val)
++{
++ if (dl_prev(val) == 0 || dl_next(val) == 0)
++ return;
++ dl_prev(dl_next(val)) = dl_prev(val);
++ dl_next(dl_prev(val)) = dl_next(val);
++ dl_prev(val) = dl_next(val) = 0;
++}
++
++char *dl_strndup(char *s, int l)
++{
++ char *n;
++ if (s == NULL)
++ return NULL;
++ n = dl_newv(char, l+1);
++ if (n == NULL)
++ return NULL;
++ else
++ {
++ strncpy(n, s, l);
++ n[l] = 0;
++ return n;
++ }
++}
++
++char *dl_strdup(char *s)
++{
++ return dl_strndup(s, (int)strlen(s));
++}
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/dlink.h busybox-1.7.4+gentoo+mdadm/mdadm/dlink.h
+--- busybox-1.7.4+gentoo/mdadm/dlink.h 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/dlink.h 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,25 @@
++
++/* doubley linked lists */
++/* This is free software. No strings attached. No copyright claimed */
++
++struct __dl_head
++{
++ void * dh_prev;
++ void * dh_next;
++};
++
++#define dl_alloc(size) ((void*)(((char*)calloc(1,(size)+sizeof(struct __dl_head)))+sizeof(struct __dl_head)))
++#define dl_new(t) ((t*)dl_alloc(sizeof(t)))
++#define dl_newv(t,n) ((t*)dl_alloc(sizeof(t)*n))
++
++#define dl_next(p) *(&(((struct __dl_head*)(p))[-1].dh_next))
++#define dl_prev(p) *(&(((struct __dl_head*)(p))[-1].dh_prev))
++
++void *dl_head(void);
++char *dl_strdup(char *);
++char *dl_strndup(char *, int);
++void dl_insert(void*, void*);
++void dl_add(void*, void*);
++void dl_del(void*);
++void dl_free(void*);
++void dl_init(void*);
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/Makefile busybox-1.7.4+gentoo+mdadm/mdadm/Makefile
+--- busybox-1.7.4+gentoo/mdadm/Makefile 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/Makefile 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,23 @@
++# Makefile for busybox
++#
++# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
++#
++# Licensed under the GPL v2, see the file LICENSE in this tarball.
++
++ifndef top_srcdir
++top_srcdir=..
++endif
++ifndef top_builddir
++top_builddir=..
++endif
++srcdir=$(top_srcdir)/mdadm
++MDADM_DIR:=./
++include $(top_builddir)/Rules.mak
++include $(top_builddir)/.config
++include Makefile.in
++all: $(libraries-y)
++-include $(top_builddir)/.depend
++
++clean:
++ rm -f *.o *.a $(AR_TARGET)
++
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/Makefile.in busybox-1.7.4+gentoo+mdadm/mdadm/Makefile.in
+--- busybox-1.7.4+gentoo/mdadm/Makefile.in 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/Makefile.in 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,31 @@
++# Makefile for busybox
++#
++# Copyright (C) 1999-2005 by Erik Andersen <andersen@codepoet.org>
++#
++# Licensed under the GPL v2, see the file LICENSE in this tarball.
++
++MDADM_AR:=mdadm.a
++ifndef $(MDADM_DIR)
++MDADM_DIR:=$(top_builddir)/mdadm/
++endif
++srcdir=$(top_srcdir)/mdadm
++
++MDADM-y:= config.o util.o dlink.o sha1.o super0.o super1.o mdexamine.o mdassemble.o
++MDADM-$(CONFIG_MDADM) += mdadm.o
++
++MDADM_SRC-y:=$(patsubst %.o,$(srcdir)/%.c,$(MDADM-y))
++MDADM_SRC-a:=$(wildcard $(srcdir)/*.c)
++APPLET_SRC-y+=$(MDADM_SRC-y)
++APPLET_SRC-a+=$(MDADM_SRC-a)
++
++MDADM-y:=$(sort $(MDADM-y))
++
++ifneq ($(strip $(MDADM-y)),)
++libraries-y+=$(MDADM_DIR)$(MDADM_AR)
++endif
++
++$(MDADM_DIR)$(MDADM_AR): $(patsubst %,$(MDADM_DIR)%, $(MDADM-y))
++ $(do_ar)
++
++$(MDADM_DIR)%.o: $(srcdir)/%.c
++ $(compile.c)
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/md5.h busybox-1.7.4+gentoo+mdadm/mdadm/md5.h
+--- busybox-1.7.4+gentoo/mdadm/md5.h 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/md5.h 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,134 @@
++/* Declaration of functions and data types used for MD5 sum computing
++ library functions.
++ Copyright (C) 1995-1997,1999-2005 Free Software Foundation, Inc.
++
++ NOTE: The canonical source of this file is maintained with the GNU C
++ Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu.
++
++ This program is free software; you can redistribute it and/or modify it
++ under the terms of the GNU General Public License as published by the
++ Free Software Foundation; either version 2, or (at your option) any
++ later version.
++
++ This program is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ GNU General Public License for more details.
++
++ You should have received a copy of the GNU General Public License
++ along with this program; if not, write to the Free Software Foundation,
++ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
++
++#ifndef _MD5_H
++#define _MD5_H 1
++
++#include <stdio.h>
++
++# include <inttypes.h>
++#if HAVE_STDINT_H || _LIBC
++# include <stdint.h>
++#endif
++
++#ifndef __GNUC_PREREQ
++# if defined __GNUC__ && defined __GNUC_MINOR__
++# define __GNUC_PREREQ(maj, min) \
++ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
++# else
++# define __GNUC_PREREQ(maj, min) 0
++# endif
++#endif
++
++#ifndef __THROW
++# if defined __cplusplus && __GNUC_PREREQ (2,8)
++# define __THROW throw ()
++# else
++# define __THROW
++# endif
++#endif
++
++#ifndef __attribute__
++# if ! __GNUC_PREREQ (2,8) || __STRICT_ANSI__
++# define __attribute__(x)
++# endif
++#endif
++
++#ifndef _LIBC
++# define __md5_buffer md5_buffer
++# define __md5_finish_ctx md5_finish_ctx
++# define __md5_init_ctx md5_init_ctx
++# define __md5_process_block md5_process_block
++# define __md5_process_bytes md5_process_bytes
++# define __md5_read_ctx md5_read_ctx
++# define __md5_stream md5_stream
++#endif
++
++typedef uint32_t md5_uint32;
++
++/* Structure to save state of computation between the single steps. */
++struct md5_ctx
++{
++ md5_uint32 A;
++ md5_uint32 B;
++ md5_uint32 C;
++ md5_uint32 D;
++
++ md5_uint32 total[2];
++ md5_uint32 buflen;
++ char buffer[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32))));
++};
++
++/*
++ * The following three functions are build up the low level used in
++ * the functions `md5_stream' and `md5_buffer'.
++ */
++
++/* Initialize structure containing state of computation.
++ (RFC 1321, 3.3: Step 3) */
++extern void __md5_init_ctx (struct md5_ctx *ctx) __THROW;
++
++/* Starting with the result of former calls of this function (or the
++ initialization function update the context for the next LEN bytes
++ starting at BUFFER.
++ It is necessary that LEN is a multiple of 64!!! */
++extern void __md5_process_block (const void *buffer, size_t len,
++ struct md5_ctx *ctx) __THROW;
++
++/* Starting with the result of former calls of this function (or the
++ initialization function update the context for the next LEN bytes
++ starting at BUFFER.
++ It is NOT required that LEN is a multiple of 64. */
++extern void __md5_process_bytes (const void *buffer, size_t len,
++ struct md5_ctx *ctx) __THROW;
++
++/* Process the remaining bytes in the buffer and put result from CTX
++ in first 16 bytes following RESBUF. The result is always in little
++ endian byte order, so that a byte-wise output yields to the wanted
++ ASCII representation of the message digest.
++
++ IMPORTANT: On some systems it is required that RESBUF be correctly
++ aligned for a 32 bits value. */
++extern void *__md5_finish_ctx (struct md5_ctx *ctx, void *resbuf) __THROW;
++
++
++/* Put result from CTX in first 16 bytes following RESBUF. The result is
++ always in little endian byte order, so that a byte-wise output yields
++ to the wanted ASCII representation of the message digest.
++
++ IMPORTANT: On some systems it is required that RESBUF is correctly
++ aligned for a 32 bits value. */
++extern void *__md5_read_ctx (const struct md5_ctx *ctx, void *resbuf) __THROW;
++
++
++/* Compute MD5 message digest for bytes read from STREAM. The
++ resulting message digest number will be written into the 16 bytes
++ beginning at RESBLOCK. */
++extern int __md5_stream (FILE *stream, void *resblock) __THROW;
++
++/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
++ result is always in little endian byte order, so that a byte-wise
++ output yields to the wanted ASCII representation of the message
++ digest. */
++extern void *__md5_buffer (const char *buffer, size_t len,
++ void *resblock) __THROW;
++
++#endif /* md5.h */
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/mdadm.c busybox-1.7.4+gentoo+mdadm/mdadm/mdadm.c
+--- busybox-1.7.4+gentoo/mdadm/mdadm.c 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/mdadm.c 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,18 @@
++/*
++ * mdadm support for busybox.
++ * added by Alan Hourihane <alanh@fairlite.demon.co.uk>
++ */
++#include <string.h>
++
++extern int mdassemble_main(int argc, char **argv);
++extern int mdexamine_main(int argc, char **argv);
++
++int mdadm_main(int argc, char **argv) {
++ if (argc >= 2) {
++ if (!strncmp(argv[1],"--assemble",10))
++ return mdassemble_main(argc, argv);
++ if (!strncmp(argv[1],"--examine",9))
++ return mdexamine_main(argc, argv);
++ }
++ return 0;
++}
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/mdadm.h busybox-1.7.4+gentoo+mdadm/mdadm/mdadm.h
+--- busybox-1.7.4+gentoo/mdadm/mdadm.h 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/mdadm.h 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,540 @@
++/*
++ * mdadm - manage Linux "md" devices aka RAID arrays.
++ *
++ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Author: Neil Brown
++ * Email: <neilb@cse.unsw.edu.au>
++ * Paper: Neil Brown
++ * School of Computer Science and Engineering
++ * The University of New South Wales
++ * Sydney, 2052
++ * Australia
++ */
++
++#include <unistd.h>
++#ifndef __dietlibc__
++extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
++#else
++# if defined(__NO_STAT64) || __WORDSIZE != 32
++# define lseek64 lseek
++# endif
++#endif
++
++#include <sys/types.h>
++#include <sys/stat.h>
++#include <stdlib.h>
++#include <time.h>
++#include <sys/time.h>
++#include <getopt.h>
++#include <fcntl.h>
++#include <stdio.h>
++#include <errno.h>
++#include <string.h>
++#include <syslog.h>
++#ifdef __dietlibc__
++#include <strings.h>
++/* dietlibc has deprecated random and srandom!! */
++#define random rand
++#define srandom srand
++#endif
++
++
++#include <linux/kdev_t.h>
++/*#include <linux/fs.h> */
++#include <sys/mount.h>
++#include <asm/types.h>
++#include <sys/ioctl.h>
++#define MD_MAJOR 9
++#define MdpMinorShift 6
++
++#ifndef BLKGETSIZE64
++#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 *arg) */
++#endif
++
++#define DEFAULT_BITMAP_CHUNK 4096
++#define DEFAULT_BITMAP_DELAY 5
++#define DEFAULT_MAX_WRITE_BEHIND 256
++
++#include "md_u.h"
++#include "md_p.h"
++#include "bitmap.h"
++
++#include <endian.h>
++/* Redhat don't like to #include <asm/byteorder.h>, and
++ * some time include <linux/byteorder/xxx_endian.h> isn't enough,
++ * and there is no standard conversion function so... */
++/* And dietlibc doesn't think byteswap is ok, so.. */
++/* #include <byteswap.h> */
++#define bswap_16(x) (((x) & 0x00ffU) << 8 | \
++ ((x) & 0xff00U) >> 8)
++#define bswap_32(x) (((x) & 0x000000ffU) << 24 | \
++ ((x) & 0xff000000U) >> 24 | \
++ ((x) & 0x0000ff00U) << 8 | \
++ ((x) & 0x00ff0000U) >> 8)
++#define bswap_64(x) (((x) & 0x00000000000000ffULL) << 56 | \
++ ((x) & 0xff00000000000000ULL) >> 56 | \
++ ((x) & 0x000000000000ff00ULL) << 40 | \
++ ((x) & 0x00ff000000000000ULL) >> 40 | \
++ ((x) & 0x0000000000ff0000ULL) << 24 | \
++ ((x) & 0x0000ff0000000000ULL) >> 24 | \
++ ((x) & 0x00000000ff000000ULL) << 8 | \
++ ((x) & 0x000000ff00000000ULL) >> 8)
++
++#if BYTE_ORDER == LITTLE_ENDIAN
++#define __cpu_to_le16(_x) (_x)
++#define __cpu_to_le32(_x) (_x)
++#define __cpu_to_le64(_x) (_x)
++#define __le16_to_cpu(_x) (_x)
++#define __le32_to_cpu(_x) (_x)
++#define __le64_to_cpu(_x) (_x)
++#elif BYTE_ORDER == BIG_ENDIAN
++#define __cpu_to_le16(_x) bswap_16(_x)
++#define __cpu_to_le32(_x) bswap_32(_x)
++#define __cpu_to_le64(_x) bswap_64(_x)
++#define __le16_to_cpu(_x) bswap_16(_x)
++#define __le32_to_cpu(_x) bswap_32(_x)
++#define __le64_to_cpu(_x) bswap_64(_x)
++#else
++# error "unknown endianness."
++#endif
++
++
++
++/* general information that might be extracted from a superblock */
++struct mdinfo {
++ mdu_array_info_t array;
++ mdu_disk_info_t disk;
++ __u64 events;
++ int uuid[4];
++ char name[33];
++ unsigned long long data_offset;
++ unsigned long long component_size;
++ int reshape_active;
++ unsigned long long reshape_progress;
++ int new_level, delta_disks, new_layout, new_chunk;
++};
++
++struct createinfo {
++ int uid;
++ int gid;
++ int autof;
++ int mode;
++ int symlinks;
++ struct supertype *supertype;
++};
++
++#define Name "mdadm"
++
++enum mode {
++ ASSEMBLE=1,
++ BUILD,
++ CREATE,
++ MANAGE,
++ MISC,
++ MONITOR,
++ GROW,
++ INCREMENTAL,
++ AUTODETECT,
++};
++
++extern char short_options[];
++extern char short_bitmap_auto_options[];
++extern struct option long_options[];
++extern char Version[], Usage[], Help[], OptionHelp[],
++ Help_create[], Help_build[], Help_assemble[], Help_grow[],
++ Help_incr[],
++ Help_manage[], Help_misc[], Help_monitor[], Help_config[];
++
++/* for option that don't have short equivilents, we assign arbitrary
++ * small numbers. '1' means an undecorated option, so we start at '2'.
++ */
++enum special_options {
++ AssumeClean = 2,
++ BitmapChunk,
++ WriteBehind,
++ ReAdd,
++ NoDegraded,
++ Sparc22,
++ BackupFile,
++ HomeHost,
++ AutoHomeHost,
++ Symlinks,
++ AutoDetect,
++};
++
++/* structures read from config file */
++/* List of mddevice names and identifiers
++ * Identifiers can be:
++ * uuid=128-hex-uuid
++ * super-minor=decimal-minor-number-from-superblock
++ * devices=comma,separated,list,of,device,names,with,wildcards
++ *
++ * If multiple fields are present, the intersection of all matching
++ * devices is considered
++ */
++#define UnSet (0xfffe)
++typedef struct mddev_ident_s {
++ char *devname;
++
++ int uuid_set;
++ int uuid[4];
++ char name[33];
++
++ unsigned int super_minor;
++
++ char *devices; /* comma separated list of device
++ * names with wild cards
++ */
++ int level;
++ unsigned int raid_disks;
++ unsigned int spare_disks;
++ struct supertype *st;
++ int autof; /* 1 for normal, 2 for partitioned */
++ char *spare_group;
++ char *bitmap_file;
++ int bitmap_fd;
++
++ struct mddev_ident_s *next;
++} *mddev_ident_t;
++
++/* List of device names - wildcards expanded */
++typedef struct mddev_dev_s {
++ char *devname;
++ char disposition; /* 'a' for add, 'r' for remove, 'f' for fail.
++ * Not set for names read from .config
++ */
++ char writemostly;
++ char re_add;
++ char used; /* set when used */
++ struct mddev_dev_s *next;
++} *mddev_dev_t;
++
++typedef struct mapping {
++ char *name;
++ int num;
++} mapping_t;
++
++
++struct mdstat_ent {
++ char *dev;
++ int devnum;
++ int active;
++ char *level;
++ char *pattern; /* U or up, _ for down */
++ int percent; /* -1 if no resync */
++ int resync; /* 1 if resync, 0 if recovery */
++ struct mdstat_ent *next;
++};
++
++extern struct mdstat_ent *mdstat_read(int hold, int start);
++extern void free_mdstat(struct mdstat_ent *ms);
++extern void mdstat_wait(int seconds);
++extern int mddev_busy(int devnum);
++
++struct map_ent {
++ struct map_ent *next;
++ int devnum;
++ int major,minor;
++ int uuid[4];
++ char *path;
++};
++extern int map_update(struct map_ent **mpp, int devnum, int major, int minor,
++ int uuid[4], char *path);
++extern struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4]);
++extern void map_read(struct map_ent **melp);
++extern int map_write(struct map_ent *mel);
++extern void map_delete(struct map_ent **mapp, int devnum);
++extern void map_free(struct map_ent *map);
++extern void map_add(struct map_ent **melp,
++ int devnum, int major, int minor, int uuid[4], char *path);
++
++/* Data structure for holding info read from sysfs */
++struct sysdev {
++ char name[20];
++ int role;
++ int major, minor;
++ unsigned long long offset, size;
++ int state;
++ int errors;
++ struct sysdev *next;
++};
++struct sysarray {
++ char name[20];
++ struct sysdev *devs;
++ int chunk;
++ unsigned long long component_size;
++ int layout;
++ int level;
++ int spares;
++ int cache_size;
++ int mismatch_cnt;
++ int major_version, minor_version;
++};
++/* various details can be requested */
++#define GET_LEVEL 1
++#define GET_LAYOUT 2
++#define GET_COMPONENT 4
++#define GET_CHUNK 8
++#define GET_CACHE 16
++#define GET_MISMATCH 32
++#define GET_VERSION 64
++
++#define GET_DEVS 1024 /* gets role, major, minor */
++#define GET_OFFSET 2048
++#define GET_SIZE 4096
++#define GET_STATE 8192
++#define GET_ERROR 16384
++
++/* If fd >= 0, get the array it is open on,
++ * else use devnum. >=0 -> major9. <0.....
++ */
++extern void sysfs_free(struct sysarray *sra);
++extern struct sysarray *sysfs_read(int fd, int devnum, unsigned long options);
++extern int sysfs_set_str(struct sysarray *sra, struct sysdev *dev,
++ char *name, char *val);
++extern int sysfs_set_num(struct sysarray *sra, struct sysdev *dev,
++ char *name, unsigned long long val);
++extern int sysfs_get_ll(struct sysarray *sra, struct sysdev *dev,
++ char *name, unsigned long long *val);
++
++
++extern int save_stripes(int *source, unsigned long long *offsets,
++ int raid_disks, int chunk_size, int level, int layout,
++ int nwrites, int *dest,
++ unsigned long long start, unsigned long long length);
++extern int restore_stripes(int *dest, unsigned long long *offsets,
++ int raid_disks, int chunk_size, int level, int layout,
++ int source, unsigned long long read_offset,
++ unsigned long long start, unsigned long long length);
++
++#ifndef Sendmail
++#define Sendmail "/usr/lib/sendmail -t"
++#endif
++
++#define SYSLOG_FACILITY LOG_DAEMON
++
++extern char *map_num(mapping_t *map, int num);
++extern int map_name(mapping_t *map, char *name);
++extern mapping_t r5layout[], pers[], modes[], faultylayout[];
++
++extern char *map_dev(int major, int minor, int create);
++
++
++extern struct superswitch {
++ void (*examine_super)(void *sbv, char *homehost);
++ void (*brief_examine_super)(void *sbv);
++ void (*detail_super)(void *sbv, char *homehost);
++ void (*export_super)(void *sbv);
++ void (*brief_detail_super)(void *sbv);
++ void (*uuid_from_super)(int uuid[4], void *sbv);
++ void (*getinfo_super)(struct mdinfo *info, void *sbv);
++ int (*match_home)(void *sbv, char *homehost);
++ int (*update_super)(struct mdinfo *info, void *sbv, char *update,
++ char *devname, int verbose,
++ int uuid_set, char *homehost);
++ int (*init_super)(struct supertype *st, void **sbp, mdu_array_info_t *info, unsigned long long size, char *name, char *homehost, int *uuid);
++ void (*add_to_super)(void *sbv, mdu_disk_info_t *dinfo);
++ int (*store_super)(struct supertype *st, int fd, void *sbv);
++ int (*write_init_super)(struct supertype *st, void *sbv, mdu_disk_info_t *dinfo, char *devname);
++ int (*compare_super)(void **firstp, void *secondv);
++ int (*load_super)(struct supertype *st, int fd, void **sbp, char *devname);
++ struct supertype * (*match_metadata_desc)(char *arg);
++ __u64 (*avail_size)(struct supertype *st, __u64 size);
++ int (*add_internal_bitmap)(struct supertype *st, void *sbv, int *chunkp,
++ int delay, int write_behind,
++ unsigned long long size, int may_change, int major);
++ void (*locate_bitmap)(struct supertype *st, int fd, void *sbv);
++ int (*write_bitmap)(struct supertype *st, int fd, void *sbv);
++ int major;
++ int swapuuid; /* true if uuid is bigending rather than hostendian */
++} super0, super1, *superlist[];
++
++struct supertype {
++ struct superswitch *ss;
++ int minor_version;
++ int max_devs;
++};
++
++extern struct supertype *super_by_version(int vers, int minor);
++extern struct supertype *guess_super(int fd);
++extern int get_dev_size(int fd, char *dname, unsigned long long *sizep);
++extern void get_one_disk(int mdfd, mdu_array_info_t *ainf,
++ mdu_disk_info_t *disk);
++
++#if __GNUC__ < 3
++struct stat64;
++#endif
++
++#define HAVE_NFTW we assume
++#define HAVE_FTW
++
++#ifdef UCLIBC
++# include <features.h>
++# ifndef __UCLIBC_HAS_FTW__
++# undef HAVE_FTW
++# undef HAVE_NFTW
++# endif
++#endif
++
++#ifdef __dietlibc__
++# undef HAVE_NFTW
++#endif
++
++#ifndef HAVE_NFTW
++# define FTW_PHYS 1
++# ifndef HAVE_FTW
++ struct FTW {};
++# endif
++#endif
++
++#ifdef HAVE_FTW
++# include <ftw.h>
++#endif
++
++extern int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s);
++
++
++extern int Manage_ro(char *devname, int fd, int readonly);
++extern int Manage_runstop(char *devname, int fd, int runstop, int quiet);
++extern int Manage_resize(char *devname, int fd, long long size, int raid_disks);
++extern int Manage_reconfig(char *devname, int fd, int layout);
++extern int Manage_subdevs(char *devname, int fd,
++ mddev_dev_t devlist, int verbose);
++extern int autodetect(void);
++extern int Grow_Add_device(char *devname, int fd, char *newdev);
++extern int Grow_addbitmap(char *devname, int fd, char *file, int chunk, int delay, int write_behind, int force);
++extern int Grow_reshape(char *devname, int fd, int quiet, char *backup_file,
++ long long size,
++ int level, int layout, int chunksize, int raid_disks);
++extern int Grow_restart(struct supertype *st, struct mdinfo *info,
++ int *fdlist, int cnt, char *backup_file);
++
++
++extern int Assemble(struct supertype *st, char *mddev, int mdfd,
++ mddev_ident_t ident,
++ mddev_dev_t devlist, char *backup_file,
++ int readonly, int runstop,
++ char *update, char *homehost,
++ int verbose, int force);
++
++extern int Build(char *mddev, int mdfd, int chunk, int level, int layout,
++ int raiddisks,
++ mddev_dev_t devlist, int assume_clean,
++ char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose);
++
++
++extern int Create(struct supertype *st, char *mddev, int mdfd,
++ int chunk, int level, int layout, unsigned long long size, int raiddisks, int sparedisks,
++ char *name, char *homehost, int *uuid,
++ int subdevs, mddev_dev_t devlist,
++ int runstop, int verbose, int force, int assume_clean,
++ char *bitmap_file, int bitmap_chunk, int write_behind, int delay);
++
++extern int Detail(char *dev, int brief, int export, int test, char *homehost);
++extern int Query(char *dev);
++
++extern int md_get_version(int fd);
++extern int get_linux_version(void);
++extern int parse_uuid(char *str, int uuid[4]);
++extern int check_ext2(int fd, char *name);
++extern int check_reiser(int fd, char *name);
++extern int check_raid(int fd, char *name);
++
++extern int get_mdp_major(void);
++extern int dev_open(char *dev, int flags);
++extern int is_standard(char *dev, int *nump);
++
++extern int parse_auto(char *str, char *msg, int config);
++extern mddev_ident_t conf_get_ident(char *dev);
++extern mddev_dev_t conf_get_devs(void);
++extern int conf_test_dev(char *devname);
++extern struct createinfo *conf_get_create_info(void);
++extern void set_conffile(char *file);
++extern char *conf_get_mailaddr(void);
++extern char *conf_get_mailfrom(void);
++extern char *conf_get_program(void);
++extern char *conf_get_homehost(void);
++extern char *conf_line(FILE *file);
++extern char *conf_word(FILE *file, int allow_key);
++extern void free_line(char *line);
++extern int match_oneof(char *devices, char *devname);
++extern void uuid_from_super(int uuid[4], mdp_super_t *super);
++extern int same_uuid(int a[4], int b[4], int swapuuid);
++extern void copy_uuid(void *a, int b[4], int swapuuid);
++/* extern int compare_super(mdp_super_t *first, mdp_super_t *second);*/
++extern unsigned long calc_csum(void *super, int bytes);
++extern int enough(int level, int raid_disks, int layout, int clean,
++ char *avail, int avail_disks);
++extern int ask(char *mesg);
++extern unsigned long long get_component_size(int fd);
++extern void remove_partitions(int fd);
++
++
++extern char *human_size(long long bytes);
++char *human_size_brief(long long bytes);
++
++extern void put_md_name(char *name);
++extern char *get_md_name(int dev);
++
++extern char DefaultConfFile[];
++
++extern int open_mddev(char *dev, int autof);
++extern int open_mddev_devnum(char *devname, int devnum, char *name,
++ char *chosen_name);
++
++
++#define LEVEL_MULTIPATH (-4)
++#define LEVEL_LINEAR (-1)
++#define LEVEL_FAULTY (-5)
++
++
++/* faulty stuff */
++
++#define WriteTransient 0
++#define ReadTransient 1
++#define WritePersistent 2
++#define ReadPersistent 3
++#define WriteAll 4 /* doesn't go to device */
++#define ReadFixable 5
++#define Modes 6
++
++#define ClearErrors 31
++#define ClearFaults 30
++
++#define AllPersist 100 /* internal use only */
++#define NoPersist 101
++
++#define ModeMask 0x1f
++#define ModeShift 5
++
++
++#ifdef __TINYC__
++#undef minor
++#undef major
++#undef makedev
++#define minor(x) ((x)&0xff)
++#define major(x) (((x)>>8)&0xff)
++#define makedev(M,m) (((M)<<8) | (m))
++#endif
++
++/* for raid5 */
++#define ALGORITHM_LEFT_ASYMMETRIC 0
++#define ALGORITHM_RIGHT_ASYMMETRIC 1
++#define ALGORITHM_LEFT_SYMMETRIC 2
++#define ALGORITHM_RIGHT_SYMMETRIC 3
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/mdassemble.c busybox-1.7.4+gentoo+mdadm/mdadm/mdassemble.c
+--- busybox-1.7.4+gentoo/mdadm/mdassemble.c 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/mdassemble.c 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,908 @@
++/*
++ * mdadm - manage Linux "md" devices aka RAID arrays.
++ *
++ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Author: Neil Brown
++ * Email: <neilb@cse.unsw.edu.au>
++ * Paper: Neil Brown
++ * School of Computer Science and Engineering
++ * The University of New South Wales
++ * Sydney, 2052
++ * Australia
++ */
++
++#include "mdadm.h"
++#include <ctype.h>
++
++static int name_matches(char *found, char *required, char *homehost)
++{
++ /* See if the name found matches the required name, possibly
++ * prefixed with 'homehost'
++ */
++ char fnd[33];
++
++ strncpy(fnd, found, 32);
++ fnd[32] = 0;
++ if (strcmp(found, required)==0)
++ return 1;
++ if (homehost) {
++ int l = strlen(homehost);
++ if (l < 32 && fnd[l] == ':' &&
++ strcmp(fnd+l+1, required)==0)
++ return 1;
++ }
++ return 0;
++}
++
++int open_mddev(char *dev, int autof/*unused */)
++{
++ int mdfd = open(dev, O_RDWR, 0);
++ if (mdfd < 0)
++ fprintf(stderr, Name ": error opening %s: %s\n",
++ dev, strerror(errno));
++ else if (md_get_version(mdfd) <= 0) {
++ fprintf(stderr, Name ": %s does not appear to be an md device\n",
++ dev);
++ close(mdfd);
++ mdfd = -1;
++ }
++ return mdfd;
++}
++
++int Assemble(struct supertype *st, char *mddev, int mdfd,
++ mddev_ident_t ident,
++ mddev_dev_t devlist, char *backup_file,
++ int readonly, int runstop,
++ char *update, char *homehost,
++ int verbose, int force)
++{
++ /*
++ * The task of Assemble is to find a collection of
++ * devices that should (according to their superblocks)
++ * form an array, and to give this collection to the MD driver.
++ * In Linux-2.4 and later, this involves submitting a
++ * SET_ARRAY_INFO ioctl with no arg - to prepare
++ * the array - and then submit a number of
++ * ADD_NEW_DISK ioctls to add disks into
++ * the array. Finally RUN_ARRAY might
++ * be submitted to start the array.
++ *
++ * Much of the work of Assemble is in finding and/or
++ * checking the disks to make sure they look right.
++ *
++ * If mddev is not set, then scan must be set and we
++ * read through the config file for dev+uuid mapping
++ * We recurse, setting mddev, for each device that
++ * - isn't running
++ * - has a valid uuid (or any uuid if !uuidset)
++ *
++ * If mddev is set, we try to determine state of md.
++ * check version - must be at least 0.90.0
++ * check kernel version. must be at least 2.4.
++ * If not, we can possibly fall back on START_ARRAY
++ * Try to GET_ARRAY_INFO.
++ * If possible, give up
++ * If not, try to STOP_ARRAY just to make sure
++ *
++ * If !uuidset and scan, look in conf-file for uuid
++ * If not found, give up
++ * If !devlist and scan and uuidset, get list of devs from conf-file
++ *
++ * For each device:
++ * Check superblock - discard if bad
++ * Check uuid (set if we don't have one) - discard if no match
++ * Check superblock similarity if we have a superblock - discard if different
++ * Record events, devicenum
++ * This should give us a list of devices for the array
++ * We should collect the most recent event number
++ *
++ * Count disks with recent enough event count
++ * While force && !enough disks
++ * Choose newest rejected disks, update event count
++ * mark clean and rewrite superblock
++ * If recent kernel:
++ * SET_ARRAY_INFO
++ * foreach device with recent events : ADD_NEW_DISK
++ * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
++ * If old kernel:
++ * Check the device numbers in superblock are right
++ * update superblock if any changes
++ * START_ARRAY
++ *
++ */
++ int clean = 0;
++ int old_linux = 0;
++ int vers = 0; /* Keep gcc quite - it really is initialised */
++ void *first_super = NULL, *super = NULL;
++ struct {
++ char *devname;
++ unsigned int major, minor;
++ unsigned int oldmajor, oldminor;
++ long long events;
++ int uptodate;
++ int state;
++ int raid_disk;
++ int disk_nr;
++ } *devices;
++ int *best = NULL; /* indexed by raid_disk */
++ unsigned int bestcnt = 0;
++ int devcnt = 0;
++ unsigned int okcnt, sparecnt;
++ unsigned int req_cnt;
++ unsigned int i;
++ int most_recent = 0;
++ int chosen_drive;
++ int change = 0;
++ int inargv = 0;
++ int bitmap_done;
++ int start_partial_ok = (runstop >= 0) && (force || devlist==NULL || mdfd < 0);
++ unsigned int num_devs;
++ mddev_dev_t tmpdev;
++ struct mdinfo info;
++ char *avail;
++ int nextspare = 0;
++
++ if (mdfd < 0)
++ return 2;
++
++ if (get_linux_version() < 2004000)
++ old_linux = 1;
++
++ if (mdfd >= 0) {
++ vers = md_get_version(mdfd);
++ if (vers <= 0) {
++ fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev);
++ return 1;
++ }
++ if (vers < 9000) {
++ fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
++ " Upgrade your kernel or try --build\n");
++ return 1;
++ }
++
++ if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) {
++ fprintf(stderr, Name ": device %s already active - cannot assemble it\n",
++ mddev);
++ return 1;
++ }
++ ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
++ }
++ /*
++ * If any subdevs are listed, then any that don't
++ * match ident are discarded. Remainder must all match and
++ * become the array.
++ * If no subdevs, then we scan all devices in the config file, but
++ * there must be something in the identity
++ */
++
++ if (!devlist &&
++ ident->uuid_set == 0 &&
++ ident->super_minor < 0 &&
++ ident->devices == NULL) {
++ fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
++ mddev ? mddev : "further assembly");
++ return 1;
++ }
++ if (devlist == NULL)
++ devlist = conf_get_devs();
++ else if (mdfd >= 0)
++ inargv = 1;
++
++ tmpdev = devlist; num_devs = 0;
++ while (tmpdev) {
++ if (tmpdev->used)
++ tmpdev->used = 2;
++ else
++ num_devs++;
++ tmpdev = tmpdev->next;
++ }
++ devices = malloc(num_devs * sizeof(*devices));
++
++ if (!st && ident->st) st = ident->st;
++
++ if (verbose>0)
++ fprintf(stderr, Name ": looking for devices for %s\n",
++ mddev ? mddev : "further assembly");
++
++ /* first walk the list of devices to find a consistent set
++ * that match the criterea, if that is possible.
++ * We flag the one we like with 'used'.
++ */
++ for (tmpdev = devlist;
++ tmpdev;
++ tmpdev = tmpdev->next) {
++ char *devname = tmpdev->devname;
++ int dfd;
++ struct stat stb;
++ struct supertype *tst = st;
++
++ if (tmpdev->used > 1) continue;
++
++ if (ident->devices &&
++ !match_oneof(ident->devices, devname)) {
++ if ((inargv && verbose>=0) || verbose > 0)
++ fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
++ continue;
++ }
++
++ if (super) {
++ free(super);
++ super = NULL;
++ }
++
++ dfd = dev_open(devname, O_RDONLY|O_EXCL);
++ if (dfd < 0) {
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": cannot open device %s: %s\n",
++ devname, strerror(errno));
++ tmpdev->used = 2;
++ } else if (fstat(dfd, &stb)< 0) {
++ /* Impossible! */
++ fprintf(stderr, Name ": fstat failed for %s: %s\n",
++ devname, strerror(errno));
++ tmpdev->used = 2;
++ } else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
++ fprintf(stderr, Name ": %s is not a block device.\n",
++ devname);
++ tmpdev->used = 2;
++ } else if (!tst && (tst = guess_super(dfd)) == NULL) {
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": no recogniseable superblock on %s\n",
++ devname);
++ tmpdev->used = 2;
++ } else if (tst->ss->load_super(tst,dfd, &super, NULL)) {
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf( stderr, Name ": no RAID superblock on %s\n",
++ devname);
++ } else {
++ tst->ss->getinfo_super(&info, super);
++ }
++ if (dfd >= 0) close(dfd);
++
++ if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) &&
++ (!super || same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) {
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": %s has wrong uuid.\n",
++ devname);
++ continue;
++ }
++ if (ident->name[0] && (!update || strcmp(update, "name")!= 0) &&
++ (!super || name_matches(info.name, ident->name, homehost)==0)) {
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": %s has wrong name.\n",
++ devname);
++ continue;
++ }
++ if (ident->super_minor != UnSet &&
++ (!super || ident->super_minor != info.array.md_minor)) {
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": %s has wrong super-minor.\n",
++ devname);
++ continue;
++ }
++ if (ident->level != UnSet &&
++ (!super|| ident->level != info.array.level)) {
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": %s has wrong raid level.\n",
++ devname);
++ continue;
++ }
++ if (ident->raid_disks != UnSet &&
++ (!super || ident->raid_disks!= info.array.raid_disks)) {
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": %s requires wrong number of drives.\n",
++ devname);
++ continue;
++ }
++ if (mdfd < 0) {
++ if (tst == NULL || super == NULL)
++ continue;
++ if (update == NULL &&
++ tst->ss->match_home(super, homehost)==0) {
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": %s is not built for host %s.\n",
++ devname, homehost);
++ /* Auto-assemble, and this is not a usable host */
++ /* if update != NULL, we are updating the host
++ * name... */
++ continue;
++ }
++ }
++ /* If we are this far, then we are nearly commited to this device.
++ * If the super_block doesn't exist, or doesn't match others,
++ * then we probably cannot continue
++ * However if one of the arrays is for the homehost, and
++ * the other isn't that can disambiguate.
++ */
++
++ if (!super) {
++ fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
++ devname);
++ free(first_super);
++ return 1;
++ }
++
++ if (st == NULL)
++ st = tst;
++ if (st->ss != tst->ss ||
++ st->minor_version != tst->minor_version ||
++ st->ss->compare_super(&first_super, super) != 0) {
++ /* Some mismatch. If exactly one array matches this host,
++ * we can resolve on that one.
++ * Or, if we are auto assembling, we just ignore the second
++ * for now.
++ */
++ if (mdfd < 0)
++ continue;
++ if (homehost) {
++ int first = st->ss->match_home(first_super, homehost);
++ int last = tst->ss->match_home(super, homehost);
++ if (first+last == 1) {
++ /* We can do something */
++ if (first) {/* just ignore this one */
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
++ devname);
++ continue;
++ } else { /* reject all those sofar */
++ mddev_dev_t td;
++ if ((inargv && verbose >= 0) || verbose > 0)
++ fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
++ devname);
++ for (td=devlist; td != tmpdev; td=td->next)
++ if (td->used == 1)
++ td->used = 0;
++ tmpdev->used = 1;
++ continue;
++ }
++ }
++ }
++ fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
++ devname);
++ free(super);
++ free(first_super);
++ return 1;
++ }
++
++ tmpdev->used = 1;
++ }
++
++ /* Ok, no bad inconsistancy, we can try updating etc */
++ bitmap_done = 0;
++ for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) {
++ char *devname = tmpdev->devname;
++ struct stat stb;
++ /* looks like a good enough match to update the super block if needed */
++ {
++ int dfd;
++ dfd = dev_open(devname, O_RDWR|O_EXCL);
++
++ remove_partitions(dfd);
++
++ if (super) {
++ free(super);
++ super = NULL;
++ }
++
++ st->ss->load_super(st, dfd, &super, NULL);
++ st->ss->getinfo_super(&info, super);
++ close(dfd);
++ }
++
++ stat(devname, &stb);
++
++ if (verbose > 0)
++ fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
++ devname, mddev, info.disk.raid_disk);
++ devices[devcnt].devname = devname;
++ devices[devcnt].major = major(stb.st_rdev);
++ devices[devcnt].minor = minor(stb.st_rdev);
++ devices[devcnt].oldmajor = info.disk.major;
++ devices[devcnt].oldminor = info.disk.minor;
++ devices[devcnt].events = info.events;
++ devices[devcnt].raid_disk = info.disk.raid_disk;
++ devices[devcnt].disk_nr = info.disk.number;
++ devices[devcnt].uptodate = 0;
++ devices[devcnt].state = info.disk.state;
++ if (most_recent < devcnt) {
++ if (devices[devcnt].events
++ > devices[most_recent].events)
++ most_recent = devcnt;
++ }
++ if (info.array.level == -4)
++ /* with multipath, the raid_disk from the superblock is meaningless */
++ i = devcnt;
++ else
++ i = devices[devcnt].raid_disk;
++ if (i+1 == 0) {
++ if (nextspare < info.array.raid_disks)
++ nextspare = info.array.raid_disks;
++ i = nextspare++;
++ } else {
++ if (i >= info.array.raid_disks &&
++ i >= nextspare)
++ nextspare = i+1;
++ }
++ if (i < 10000) {
++ if (i >= bestcnt) {
++ unsigned int newbestcnt = i+10;
++ int *newbest = malloc(sizeof(int)*newbestcnt);
++ unsigned int c;
++ for (c=0; c < newbestcnt; c++)
++ if (c < bestcnt)
++ newbest[c] = best[c];
++ else
++ newbest[c] = -1;
++ if (best)free(best);
++ best = newbest;
++ bestcnt = newbestcnt;
++ }
++ if (best[i] >=0 &&
++ devices[best[i]].events == devices[devcnt].events &&
++ devices[best[i]].minor != devices[devcnt].minor &&
++ st->ss->major == 0 &&
++ info.array.level != -4) {
++ /* two different devices with identical superblock.
++ * Could be a mis-detection caused by overlapping
++ * partitions. fail-safe.
++ */
++ fprintf(stderr, Name ": WARNING %s and %s appear"
++ " to have very similar superblocks.\n"
++ " If they are really different, "
++ "please --zero the superblock on one\n"
++ " If they are the same or overlap,"
++ " please remove one from %s.\n",
++ devices[best[i]].devname, devname,
++ inargv ? "the list" :
++ "the\n DEVICE list in mdadm.conf"
++ );
++ return 1;
++ }
++ if (best[i] == -1
++ || devices[best[i]].events < devices[devcnt].events)
++ best[i] = devcnt;
++ }
++ devcnt++;
++ }
++
++ if (super)
++ free(super);
++ super = NULL;
++
++ if (update && strcmp(update, "byteorder")==0)
++ st->minor_version = 90;
++
++ if (devcnt == 0) {
++ fprintf(stderr, Name ": no devices found for %s\n",
++ mddev);
++ free(first_super);
++ return 1;
++ }
++
++ st->ss->getinfo_super(&info, first_super);
++ clean = info.array.state & 1;
++
++ /* now we have some devices that might be suitable.
++ * I wonder how many
++ */
++ avail = malloc(info.array.raid_disks);
++ memset(avail, 0, info.array.raid_disks);
++ okcnt = 0;
++ sparecnt=0;
++ for (i=0; i< bestcnt ;i++) {
++ int j = best[i];
++ int event_margin = 1; /* always allow a difference of '1'
++ * like the kernel does
++ */
++ if (j < 0) continue;
++ /* note: we ignore error flags in multipath arrays
++ * as they don't make sense
++ */
++ if (info.array.level != -4)
++ if (!(devices[j].state & (1<<MD_DISK_SYNC))) {
++ if (!(devices[j].state & (1<<MD_DISK_FAULTY)))
++ sparecnt++;
++ continue;
++ }
++ if (devices[j].events+event_margin >=
++ devices[most_recent].events) {
++ devices[j].uptodate = 1;
++ if (i < info.array.raid_disks) {
++ okcnt++;
++ avail[i]=1;
++ } else
++ sparecnt++;
++ }
++ }
++ while (force && !enough(info.array.level, info.array.raid_disks,
++ info.array.layout, 1,
++ avail, okcnt)) {
++ /* Choose the newest best drive which is
++ * not up-to-date, update the superblock
++ * and add it.
++ */
++ int fd;
++ long long current_events;
++ chosen_drive = -1;
++ for (i=0; i<info.array.raid_disks && i < bestcnt; i++) {
++ int j = best[i];
++ if (j>=0 &&
++ !devices[j].uptodate &&
++ devices[j].events > 0 &&
++ (chosen_drive < 0 ||
++ devices[j].events > devices[chosen_drive].events))
++ chosen_drive = j;
++ }
++ if (chosen_drive < 0)
++ break;
++ current_events = devices[chosen_drive].events;
++ add_another:
++ if (verbose >= 0)
++ fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
++ devices[chosen_drive].devname, devices[chosen_drive].raid_disk,
++ (int)(devices[chosen_drive].events),
++ (int)(devices[most_recent].events));
++ fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
++ if (fd < 0) {
++ fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
++ devices[chosen_drive].devname);
++ devices[chosen_drive].events = 0;
++ continue;
++ }
++ if (st->ss->load_super(st,fd, &super, NULL)) {
++ close(fd);
++ fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
++ devices[chosen_drive].devname);
++ devices[chosen_drive].events = 0;
++ continue;
++ }
++ info.events = devices[most_recent].events;
++ st->ss->update_super(&info, super, "force-one",
++ devices[chosen_drive].devname, verbose,
++ 0, NULL);
++
++ if (st->ss->store_super(st, fd, super)) {
++ close(fd);
++ fprintf(stderr, Name ": Could not re-write superblock on %s\n",
++ devices[chosen_drive].devname);
++ devices[chosen_drive].events = 0;
++ free(super);
++ continue;
++ }
++ close(fd);
++ devices[chosen_drive].events = devices[most_recent].events;
++ devices[chosen_drive].uptodate = 1;
++ avail[chosen_drive] = 1;
++ okcnt++;
++ free(super);
++
++ /* If there are any other drives of the same vintage,
++ * add them in as well. We can't lose and we might gain
++ */
++ for (i=0; i<info.array.raid_disks && i < bestcnt ; i++) {
++ int j = best[i];
++ if (j >= 0 &&
++ !devices[j].uptodate &&
++ devices[j].events > 0 &&
++ devices[j].events == current_events) {
++ chosen_drive = j;
++ goto add_another;
++ }
++ }
++ }
++
++ /* Now we want to look at the superblock which the kernel will base things on
++ * and compare the devices that we think are working with the devices that the
++ * superblock thinks are working.
++ * If there are differences and --force is given, then update this chosen
++ * superblock.
++ */
++ chosen_drive = -1;
++ super = NULL;
++ for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
++ int j = best[i];
++ int fd;
++
++ if (j<0)
++ continue;
++ if (!devices[j].uptodate)
++ continue;
++ chosen_drive = j;
++ if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
++ fprintf(stderr, Name ": Cannot open %s: %s\n",
++ devices[j].devname, strerror(errno));
++ return 1;
++ }
++ if (st->ss->load_super(st,fd, &super, NULL)) {
++ close(fd);
++ fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
++ devices[j].devname);
++ return 1;
++ }
++ close(fd);
++ }
++ if (super == NULL) {
++ fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
++ return 1;
++ }
++ st->ss->getinfo_super(&info, super);
++ for (i=0; i<bestcnt; i++) {
++ int j = best[i];
++ unsigned int desired_state;
++
++ if (i < info.array.raid_disks)
++ desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
++ else
++ desired_state = 0;
++
++ if (j<0)
++ continue;
++ if (!devices[j].uptodate)
++ continue;
++ info.disk.number = devices[j].disk_nr;
++ info.disk.raid_disk = i;
++ info.disk.state = desired_state;
++
++ if (devices[j].uptodate &&
++ st->ss->update_super(&info, super, "assemble", NULL, verbose, 0, NULL)) {
++ if (force) {
++ if (verbose >= 0)
++ fprintf(stderr, Name ": "
++ "clearing FAULTY flag for device %d in %s for %s\n",
++ j, mddev, devices[j].devname);
++ change = 1;
++ } else {
++ if (verbose >= -1)
++ fprintf(stderr, Name ": "
++ "device %d in %s has wrong state in superblock, but %s seems ok\n",
++ i, mddev, devices[j].devname);
++ }
++ }
++#if 0
++ if (!devices[j].uptodate &&
++ !(super.disks[i].state & (1 << MD_DISK_FAULTY))) {
++ fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
++ i, mddev);
++ }
++#endif
++ }
++ if (force && !clean &&
++ !enough(info.array.level, info.array.raid_disks,
++ info.array.layout, clean,
++ avail, okcnt)) {
++ change += st->ss->update_super(&info, super, "force-array",
++ devices[chosen_drive].devname, verbose,
++ 0, NULL);
++ clean = 1;
++ }
++
++ if (change) {
++ int fd;
++ fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
++ if (fd < 0) {
++ fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
++ devices[chosen_drive].devname);
++ return 1;
++ }
++ if (st->ss->store_super(st, fd, super)) {
++ close(fd);
++ fprintf(stderr, Name ": Could not re-write superblock on %s\n",
++ devices[chosen_drive].devname);
++ return 1;
++ }
++ close(fd);
++ }
++
++ /* count number of in-sync devices according to the superblock.
++ * We must have this number to start the array without -s or -R
++ */
++ req_cnt = info.array.working_disks;
++
++ /* Almost ready to actually *do* something */
++ if (!old_linux) {
++ int rv;
++ if ((vers % 100) >= 1) { /* can use different versions */
++ mdu_array_info_t inf;
++ memset(&inf, 0, sizeof(inf));
++ inf.major_version = st->ss->major;
++ inf.minor_version = st->minor_version;
++ rv = ioctl(mdfd, SET_ARRAY_INFO, &inf);
++ } else
++ rv = ioctl(mdfd, SET_ARRAY_INFO, NULL);
++
++ if (rv) {
++ fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
++ mddev, strerror(errno));
++ return 1;
++ }
++ if (ident->bitmap_fd >= 0) {
++ if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
++ fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
++ return 1;
++ }
++ } else if (ident->bitmap_file) {
++ /* From config file */
++ int bmfd = open(ident->bitmap_file, O_RDWR);
++ if (bmfd < 0) {
++ fprintf(stderr, Name ": Could not open bitmap file %s\n",
++ ident->bitmap_file);
++ return 1;
++ }
++ if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
++ fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
++ close(bmfd);
++ return 1;
++ }
++ close(bmfd);
++ }
++
++ /* First, add the raid disks, but add the chosen one last */
++ for (i=0; i<= bestcnt; i++) {
++ int j;
++ if (i < bestcnt) {
++ j = best[i];
++ if (j == chosen_drive)
++ continue;
++ } else
++ j = chosen_drive;
++
++ if (j >= 0 /* && devices[j].uptodate */) {
++ mdu_disk_info_t disk;
++ memset(&disk, 0, sizeof(disk));
++ disk.major = devices[j].major;
++ disk.minor = devices[j].minor;
++ if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) {
++ fprintf(stderr, Name ": failed to add %s to %s: %s\n",
++ devices[j].devname,
++ mddev,
++ strerror(errno));
++ if (i < info.array.raid_disks || i == bestcnt)
++ okcnt--;
++ else
++ sparecnt--;
++ } else if (verbose > 0)
++ fprintf(stderr, Name ": added %s to %s as %d\n",
++ devices[j].devname, mddev, devices[j].raid_disk);
++ } else if (verbose > 0 && i < info.array.raid_disks)
++ fprintf(stderr, Name ": no uptodate device for slot %d of %s\n",
++ i, mddev);
++ }
++
++ if (runstop == 1 ||
++ (runstop <= 0 &&
++ ( enough(info.array.level, info.array.raid_disks,
++ info.array.layout, clean, avail, okcnt) &&
++ (okcnt >= req_cnt || start_partial_ok)
++ ))) {
++ if (ioctl(mdfd, RUN_ARRAY, NULL)==0) {
++ if (verbose >= 0) {
++ fprintf(stderr, Name ": %s has been started with %d drive%s",
++ mddev, okcnt, okcnt==1?"":"s");
++ if (okcnt < info.array.raid_disks)
++ fprintf(stderr, " (out of %d)", info.array.raid_disks);
++ if (sparecnt)
++ fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
++ fprintf(stderr, ".\n");
++ }
++ return 0;
++ }
++ fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
++ mddev, strerror(errno));
++
++ if (!enough(info.array.level, info.array.raid_disks,
++ info.array.layout, 1, avail, okcnt))
++ fprintf(stderr, Name ": Not enough devices to "
++ "start the array.\n");
++ else if (!enough(info.array.level,
++ info.array.raid_disks,
++ info.array.layout, clean,
++ avail, okcnt))
++ fprintf(stderr, Name ": Not enough devices to "
++ "start the array while not clean "
++ "- consider --force.\n");
++
++ return 1;
++ }
++ if (runstop == -1) {
++ fprintf(stderr, Name ": %s assembled from %d drive%s",
++ mddev, okcnt, okcnt==1?"":"s");
++ if (okcnt != info.array.raid_disks)
++ fprintf(stderr, " (out of %d)", info.array.raid_disks);
++ fprintf(stderr, ", but not started.\n");
++ return 0;
++ }
++ if (verbose >= -1) {
++ fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
++ if (sparecnt)
++ fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
++ if (!enough(info.array.level, info.array.raid_disks,
++ info.array.layout, 1, avail, okcnt))
++ fprintf(stderr, " - not enough to start the array.\n");
++ else if (!enough(info.array.level,
++ info.array.raid_disks,
++ info.array.layout, clean,
++ avail, okcnt))
++ fprintf(stderr, " - not enough to start the "
++ "array while not clean - consider "
++ "--force.\n");
++ else {
++ if (req_cnt == info.array.raid_disks)
++ fprintf(stderr, " - need all %d to start it", req_cnt);
++ else
++ fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks);
++ fprintf(stderr, " (use --run to insist).\n");
++ }
++ }
++ return 1;
++ } else {
++ /* The "chosen_drive" is a good choice, and if necessary, the superblock has
++ * been updated to point to the current locations of devices.
++ * so we can just start the array
++ */
++ unsigned long dev;
++ dev = makedev(devices[chosen_drive].major,
++ devices[chosen_drive].minor);
++ if (ioctl(mdfd, START_ARRAY, dev)) {
++ fprintf(stderr, Name ": Cannot start array: %s\n",
++ strerror(errno));
++ }
++
++ }
++ return 0;
++}
++
++int mdfd = -1;
++int runstop = 0;
++int readonly = 0;
++int verbose = 0;
++int force = 0;
++
++int mdassemble_main(int argc, char **argv) {
++ mddev_ident_t array_list = conf_get_ident(NULL);
++ int minor;
++ if (!array_list) {
++ fprintf(stderr, Name ": No arrays found in config file\n");
++ return 1;
++ } else {
++ for (; array_list; array_list = array_list->next) {
++ mdu_array_info_t array;
++ if (!strncmp("/dev/md", array_list->devname, 7)) {
++ errno = 0;
++ minor = strtoul(array_list->devname + 7, NULL, 0);
++ if (!errno) {
++ mknod(array_list->devname, S_IFBLK|0600, makedev(MD_MAJOR, minor));
++ }
++ }
++ mdfd = open_mddev(array_list->devname, array_list->autof);
++ if (mdfd < 0) {
++
++ fprintf(stderr, Name ": failed to open array\n");
++ continue;
++ }
++ if (ioctl(mdfd, GET_ARRAY_INFO, &array) < 0) {
++ Assemble(array_list->st, array_list->devname, mdfd,
++ array_list, NULL, NULL,
++ readonly, runstop, NULL, NULL, verbose, force);
++ }
++ close(mdfd);
++ }
++ }
++ return 0;
++}
++
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/mdexamine.c busybox-1.7.4+gentoo+mdadm/mdadm/mdexamine.c
+--- busybox-1.7.4+gentoo/mdadm/mdexamine.c 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/mdexamine.c 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,157 @@
++/*
++ * mdadm - manage Linux "md" devices aka RAID arrays.
++ *
++ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Author: Neil Brown
++ * Email: <neilb@cse.unsw.edu.au>
++ * Paper: Neil Brown
++ * School of Computer Science and Engineering
++ * The University of New South Wales
++ * Sydney, 2052
++ * Australia
++ */
++
++#include "mdadm.h"
++#include "dlink.h"
++
++#if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN)
++#error no endian defined
++#endif
++#include "md_u.h"
++#include "md_p.h"
++
++static int Examine(mddev_dev_t devlist, int brief, int scan,
++ int SparcAdjust, struct supertype *forcest,
++ char *homehost)
++{
++
++ /* Read the raid superblock from a device and
++ * display important content.
++ *
++ * If cannot be found, print reason: too small, bad magic
++ *
++ * Print:
++ * version, ctime, level, size, raid+spare+
++ * prefered minor
++ * uuid
++ *
++ * utime, state etc
++ *
++ * If (brief) gather devices for same array and just print a mdadm.conf line including devices=
++ * if devlist==NULL, use conf_get_devs()
++ */
++ int fd;
++ void *super = NULL;
++ int rv = 0;
++ int err = 0;
++
++ struct array {
++ void *super;
++ struct supertype *st;
++ struct mdinfo info;
++ void *devs;
++ struct array *next;
++ int spares;
++ } *arrays = NULL;
++
++ for (; devlist ; devlist=devlist->next) {
++ struct supertype *st = forcest;
++
++ fd = dev_open(devlist->devname, O_RDONLY);
++ if (fd < 0) {
++ if (!scan) {
++ fprintf(stderr,Name ": cannot open %s: %s\n",
++ devlist->devname, strerror(errno));
++ rv = 1;
++ }
++ err = 1;
++ }
++ else {
++ if (!st)
++ st = guess_super(fd);
++ if (st)
++ err = st->ss->load_super(st, fd, &super, (brief||scan)?NULL:devlist->devname);
++ else {
++ if (!brief) {
++ fprintf(stderr, Name ": No md superblock detected on %s.\n", devlist->devname);
++ rv = 1;
++ }
++ err = 1;
++ }
++ close(fd);
++ }
++ if (err)
++ continue;
++
++ if (SparcAdjust)
++ st->ss->update_super(NULL, super, "sparc2.2", devlist->devname, 0, 0, NULL);
++ /* Ok, its good enough to try, though the checksum could be wrong */
++ if (brief) {
++ struct array *ap;
++ char *d;
++ for (ap=arrays; ap; ap=ap->next) {
++ if (st->ss == ap->st->ss && st->ss->compare_super(&ap->super, super)==0)
++ break;
++ }
++ if (!ap) {
++ ap = malloc(sizeof(*ap));
++ ap->super = super;
++ ap->devs = dl_head();
++ ap->next = arrays;
++ ap->spares = 0;
++ ap->st = st;
++ arrays = ap;
++ st->ss->getinfo_super(&ap->info, super);
++ } else {
++ st->ss->getinfo_super(&ap->info, super);
++ free(super);
++ }
++ if (!(ap->info.disk.state & MD_DISK_SYNC))
++ ap->spares++;
++ d = dl_strdup(devlist->devname);
++ dl_add(ap->devs, d);
++ }
++ }
++ if (brief) {
++ struct array *ap;
++ for (ap=arrays; ap; ap=ap->next) {
++ char sep='=';
++ char *d;
++ ap->st->ss->brief_examine_super(ap->super);
++ if (ap->spares) printf(" spares=%d", ap->spares);
++ if (brief > 1) {
++ printf(" devices");
++ for (d=dl_next(ap->devs); d!= ap->devs; d=dl_next(d)) {
++ printf("%c%s", sep, d);
++ sep=',';
++ }
++ }
++ free(ap->super);
++ /* FIXME free ap */
++ if (ap->spares || brief > 1)
++ printf("\n");
++ }
++ }
++ return rv;
++}
++
++int mdexamine_main(int argc, char **argv) {
++ return Examine(conf_get_devs(), 1, 0, 0, NULL, NULL);
++}
++
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/md_p.h busybox-1.7.4+gentoo+mdadm/mdadm/md_p.h
+--- busybox-1.7.4+gentoo/mdadm/md_p.h 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/md_p.h 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,194 @@
++/*
++ md_p.h : physical layout of Linux RAID devices
++ Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman
++
++ This program is free software; you can redistribute it and/or modify
++ it under the terms of the GNU General Public License as published by
++ the Free Software Foundation; either version 2, or (at your option)
++ any later version.
++
++ You should have received a copy of the GNU General Public License
++ (for example /usr/src/linux/COPYING); if not, write to the Free
++ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
++*/
++
++#ifndef _MD_P_H
++#define _MD_P_H
++
++/*
++ * RAID superblock.
++ *
++ * The RAID superblock maintains some statistics on each RAID configuration.
++ * Each real device in the RAID set contains it near the end of the device.
++ * Some of the ideas are copied from the ext2fs implementation.
++ *
++ * We currently use 4096 bytes as follows:
++ *
++ * word offset function
++ *
++ * 0 - 31 Constant generic RAID device information.
++ * 32 - 63 Generic state information.
++ * 64 - 127 Personality specific information.
++ * 128 - 511 12 32-words descriptors of the disks in the raid set.
++ * 512 - 911 Reserved.
++ * 912 - 1023 Disk specific descriptor.
++ */
++
++/*
++ * If x is the real device size in bytes, we return an apparent size of:
++ *
++ * y = (x & ~(MD_RESERVED_BYTES - 1)) - MD_RESERVED_BYTES
++ *
++ * and place the 4kB superblock at offset y.
++ */
++#define MD_RESERVED_BYTES (64 * 1024)
++#define MD_RESERVED_SECTORS (MD_RESERVED_BYTES / 512)
++#define MD_RESERVED_BLOCKS (MD_RESERVED_BYTES / BLOCK_SIZE)
++
++#define MD_NEW_SIZE_SECTORS(x) ((x & ~(MD_RESERVED_SECTORS - 1)) - MD_RESERVED_SECTORS)
++#define MD_NEW_SIZE_BLOCKS(x) ((x & ~(MD_RESERVED_BLOCKS - 1)) - MD_RESERVED_BLOCKS)
++
++#define MD_SB_BYTES 4096
++#define MD_SB_WORDS (MD_SB_BYTES / 4)
++#define MD_SB_BLOCKS (MD_SB_BYTES / BLOCK_SIZE)
++#define MD_SB_SECTORS (MD_SB_BYTES / 512)
++
++/*
++ * The following are counted in 32-bit words
++ */
++#define MD_SB_GENERIC_OFFSET 0
++#define MD_SB_PERSONALITY_OFFSET 64
++#define MD_SB_DISKS_OFFSET 128
++#define MD_SB_DESCRIPTOR_OFFSET 992
++
++#define MD_SB_GENERIC_CONSTANT_WORDS 32
++#define MD_SB_GENERIC_STATE_WORDS 32
++#define MD_SB_GENERIC_WORDS (MD_SB_GENERIC_CONSTANT_WORDS + MD_SB_GENERIC_STATE_WORDS)
++#define MD_SB_PERSONALITY_WORDS 64
++#define MD_SB_DESCRIPTOR_WORDS 32
++#define MD_SB_DISKS 27
++#define MD_SB_DISKS_WORDS (MD_SB_DISKS*MD_SB_DESCRIPTOR_WORDS)
++#define MD_SB_RESERVED_WORDS (1024 - MD_SB_GENERIC_WORDS - MD_SB_PERSONALITY_WORDS - MD_SB_DISKS_WORDS - MD_SB_DESCRIPTOR_WORDS)
++#define MD_SB_EQUAL_WORDS (MD_SB_GENERIC_WORDS + MD_SB_PERSONALITY_WORDS + MD_SB_DISKS_WORDS)
++
++/*
++ * Device "operational" state bits
++ */
++#define MD_DISK_FAULTY 0 /* disk is faulty / operational */
++#define MD_DISK_ACTIVE 1 /* disk is running or spare disk */
++#define MD_DISK_SYNC 2 /* disk is in sync with the raid set */
++#define MD_DISK_REMOVED 3 /* disk is in sync with the raid set */
++
++#define MD_DISK_WRITEMOSTLY 9 /* disk is "write-mostly" is RAID1 config.
++ * read requests will only be sent here in
++ * dire need
++ */
++
++typedef struct mdp_device_descriptor_s {
++ __u32 number; /* 0 Device number in the entire set */
++ __u32 major; /* 1 Device major number */
++ __u32 minor; /* 2 Device minor number */
++ __u32 raid_disk; /* 3 The role of the device in the raid set */
++ __u32 state; /* 4 Operational state */
++ __u32 reserved[MD_SB_DESCRIPTOR_WORDS - 5];
++} mdp_disk_t;
++
++#define MD_SB_MAGIC 0xa92b4efc
++
++/*
++ * Superblock state bits
++ */
++#define MD_SB_CLEAN 0
++#define MD_SB_ERRORS 1
++
++#define MD_SB_BITMAP_PRESENT 8 /* bitmap may be present nearby */
++
++typedef struct mdp_superblock_s {
++ /*
++ * Constant generic information
++ */
++ __u32 md_magic; /* 0 MD identifier */
++ __u32 major_version; /* 1 major version to which the set conforms */
++ __u32 minor_version; /* 2 minor version ... */
++ __u32 patch_version; /* 3 patchlevel version ... */
++ __u32 gvalid_words; /* 4 Number of used words in this section */
++ __u32 set_uuid0; /* 5 Raid set identifier */
++ __u32 ctime; /* 6 Creation time */
++ __u32 level; /* 7 Raid personality */
++ __u32 size; /* 8 Apparent size of each individual disk */
++ __u32 nr_disks; /* 9 total disks in the raid set */
++ __u32 raid_disks; /* 10 disks in a fully functional raid set */
++ __u32 md_minor; /* 11 preferred MD minor device number */
++ __u32 not_persistent; /* 12 does it have a persistent superblock */
++ __u32 set_uuid1; /* 13 Raid set identifier #2 */
++ __u32 set_uuid2; /* 14 Raid set identifier #3 */
++ __u32 set_uuid3; /* 15 Raid set identifier #4 */
++ __u32 gstate_creserved[MD_SB_GENERIC_CONSTANT_WORDS - 16];
++
++ /*
++ * Generic state information
++ */
++ __u32 utime; /* 0 Superblock update time */
++ __u32 state; /* 1 State bits (clean, ...) */
++ __u32 active_disks; /* 2 Number of currently active disks */
++ __u32 working_disks; /* 3 Number of working disks */
++ __u32 failed_disks; /* 4 Number of failed disks */
++ __u32 spare_disks; /* 5 Number of spare disks */
++ __u32 sb_csum; /* 6 checksum of the whole superblock */
++#if __BYTE_ORDER == __BIG_ENDIAN
++ __u32 events_hi; /* 7 high-order of superblock update count */
++ __u32 events_lo; /* 8 low-order of superblock update count */
++ __u32 cp_events_hi; /* 9 high-order of checkpoint update count */
++ __u32 cp_events_lo; /* 10 low-order of checkpoint update count */
++#else
++ __u32 events_lo; /* 7 low-order of superblock update count */
++ __u32 events_hi; /* 8 high-order of superblock update count */
++ __u32 cp_events_lo; /* 9 low-order of checkpoint update count */
++ __u32 cp_events_hi; /* 10 high-order of checkpoint update count */
++#endif
++ __u32 recovery_cp; /* 11 recovery checkpoint sector count */
++ /* There are only valid for minor_version > 90 */
++ __u64 reshape_position; /* 12,13 next address in array-space for reshape */
++ __u32 new_level; /* 14 new level we are reshaping to */
++ __u32 delta_disks; /* 15 change in number of raid_disks */
++ __u32 new_layout; /* 16 new layout */
++ __u32 new_chunk; /* 17 new chunk size (bytes) */
++ __u32 gstate_sreserved[MD_SB_GENERIC_STATE_WORDS - 18];
++
++ /*
++ * Personality information
++ */
++ __u32 layout; /* 0 the array's physical layout */
++ __u32 chunk_size; /* 1 chunk size in bytes */
++ __u32 root_pv; /* 2 LV root PV */
++ __u32 root_block; /* 3 LV root block */
++ __u32 pstate_reserved[MD_SB_PERSONALITY_WORDS - 4];
++
++ /*
++ * Disks information
++ */
++ mdp_disk_t disks[MD_SB_DISKS];
++
++ /*
++ * Reserved
++ */
++ __u32 reserved[MD_SB_RESERVED_WORDS];
++
++ /*
++ * Active descriptor
++ */
++ mdp_disk_t this_disk;
++
++} mdp_super_t;
++
++#ifdef __TINYC__
++typedef unsigned long long __u64;
++#endif
++
++static inline __u64 md_event(mdp_super_t *sb) {
++ __u64 ev = sb->events_hi;
++ return (ev<<32)| sb->events_lo;
++}
++
++#endif
++
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/md_u.h busybox-1.7.4+gentoo+mdadm/mdadm/md_u.h
+--- busybox-1.7.4+gentoo/mdadm/md_u.h 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/md_u.h 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,123 @@
++/*
++ md_u.h : user <=> kernel API between Linux raidtools and RAID drivers
++ Copyright (C) 1998 Ingo Molnar
++
++ This program is free software; you can redistribute it and/or modify
++ it under the terms of the GNU General Public License as published by
++ the Free Software Foundation; either version 2, or (at your option)
++ any later version.
++
++ You should have received a copy of the GNU General Public License
++ (for example /usr/src/linux/COPYING); if not, write to the Free
++ Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
++*/
++
++#ifndef _MD_U_H
++#define _MD_U_H
++
++/* ioctls */
++
++/* status */
++#define RAID_VERSION _IOR (MD_MAJOR, 0x10, mdu_version_t)
++#define GET_ARRAY_INFO _IOR (MD_MAJOR, 0x11, mdu_array_info_t)
++#define GET_DISK_INFO _IOR (MD_MAJOR, 0x12, mdu_disk_info_t)
++#define PRINT_RAID_DEBUG _IO (MD_MAJOR, 0x13)
++#define RAID_AUTORUN _IO (MD_MAJOR, 0x14)
++#define GET_BITMAP_FILE _IOR (MD_MAJOR, 0x15, mdu_bitmap_file_t)
++
++/* configuration */
++#define CLEAR_ARRAY _IO (MD_MAJOR, 0x20)
++#define ADD_NEW_DISK _IOW (MD_MAJOR, 0x21, mdu_disk_info_t)
++#define HOT_REMOVE_DISK _IO (MD_MAJOR, 0x22)
++#define SET_ARRAY_INFO _IOW (MD_MAJOR, 0x23, mdu_array_info_t)
++#define SET_DISK_INFO _IO (MD_MAJOR, 0x24)
++#define WRITE_RAID_INFO _IO (MD_MAJOR, 0x25)
++#define UNPROTECT_ARRAY _IO (MD_MAJOR, 0x26)
++#define PROTECT_ARRAY _IO (MD_MAJOR, 0x27)
++#define HOT_ADD_DISK _IO (MD_MAJOR, 0x28)
++#define SET_DISK_FAULTY _IO (MD_MAJOR, 0x29)
++#define SET_BITMAP_FILE _IOW (MD_MAJOR, 0x2b, int)
++
++/* usage */
++#define RUN_ARRAY _IOW (MD_MAJOR, 0x30, mdu_param_t)
++#define START_ARRAY _IO (MD_MAJOR, 0x31)
++#define STOP_ARRAY _IO (MD_MAJOR, 0x32)
++#define STOP_ARRAY_RO _IO (MD_MAJOR, 0x33)
++#define RESTART_ARRAY_RW _IO (MD_MAJOR, 0x34)
++
++typedef struct mdu_version_s {
++ int major;
++ int minor;
++ int patchlevel;
++} mdu_version_t;
++
++typedef struct mdu_array_info_s {
++ /*
++ * Generic constant information
++ */
++ int major_version;
++ int minor_version;
++ int patch_version;
++ int ctime;
++ int level;
++ int size;
++ int nr_disks;
++ int raid_disks;
++ int md_minor;
++ int not_persistent;
++
++ /*
++ * Generic state information
++ */
++ int utime; /* 0 Superblock update time */
++ int state; /* 1 State bits (clean, ...) */
++ int active_disks; /* 2 Number of currently active disks */
++ int working_disks; /* 3 Number of working disks */
++ int failed_disks; /* 4 Number of failed disks */
++ int spare_disks; /* 5 Number of spare disks */
++
++ /*
++ * Personality information
++ */
++ int layout; /* 0 the array's physical layout */
++ int chunk_size; /* 1 chunk size in bytes */
++
++} mdu_array_info_t;
++
++typedef struct mdu_disk_info_s {
++ /*
++ * configuration/status of one particular disk
++ */
++ int number;
++ int major;
++ int minor;
++ int raid_disk;
++ int state;
++
++} mdu_disk_info_t;
++
++typedef struct mdu_start_info_s {
++ /*
++ * configuration/status of one particular disk
++ */
++ int major;
++ int minor;
++ int raid_disk;
++ int state;
++
++} mdu_start_info_t;
++
++typedef struct mdu_bitmap_file_s
++{
++ char pathname[4096];
++} mdu_bitmap_file_t;
++
++typedef struct mdu_param_s
++{
++ int personality; /* 1,2,3,4 */
++ int chunk_size; /* in bytes */
++ int max_fault; /* unused for now */
++} mdu_param_t;
++
++#endif
++
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/sha1.c busybox-1.7.4+gentoo+mdadm/mdadm/sha1.c
+--- busybox-1.7.4+gentoo/mdadm/sha1.c 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/sha1.c 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,423 @@
++/* sha1.c - Functions to compute SHA1 message digest of files or
++ memory blocks according to the NIST specification FIPS-180-1.
++
++ Copyright (C) 2000, 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
++
++ This program is free software; you can redistribute it and/or modify it
++ under the terms of the GNU General Public License as published by the
++ Free Software Foundation; either version 2, or (at your option) any
++ later version.
++
++ This program is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ GNU General Public License for more details.
++
++ You should have received a copy of the GNU General Public License
++ along with this program; if not, write to the Free Software Foundation,
++ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
++
++/* Written by Scott G. Miller
++ Credits:
++ Robert Klep <robert@ilse.nl> -- Expansion function fix
++*/
++
++#ifdef HAVE_CONFIG_H
++# include <config.h>
++#endif
++
++#include "sha1.h"
++
++#include <stddef.h>
++#include <string.h>
++
++#if USE_UNLOCKED_IO
++# include "unlocked-io.h"
++#endif
++
++/* SWAP does an endian swap on architectures that are little-endian,
++ as SHA1 needs some data in a big-endian form. */
++
++#ifdef WORDS_BIGENDIAN
++# define SWAP(n) (n)
++#else
++# define SWAP(n) \
++ (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
++#endif
++
++#define BLOCKSIZE 4096
++#if BLOCKSIZE % 64 != 0
++# error "invalid BLOCKSIZE"
++#endif
++
++/* This array contains the bytes used to pad the buffer to the next
++ 64-byte boundary. (RFC 1321, 3.1: Step 1) */
++static const unsigned char fillbuf[64] = { 0x80, 0 /* , 0, 0, ... */ };
++
++
++/*
++ Takes a pointer to a 160 bit block of data (five 32 bit ints) and
++ intializes it to the start constants of the SHA1 algorithm. This
++ must be called before using hash in the call to sha1_hash.
++*/
++void
++sha1_init_ctx (struct sha1_ctx *ctx)
++{
++ ctx->A = 0x67452301;
++ ctx->B = 0xefcdab89;
++ ctx->C = 0x98badcfe;
++ ctx->D = 0x10325476;
++ ctx->E = 0xc3d2e1f0;
++
++ ctx->total[0] = ctx->total[1] = 0;
++ ctx->buflen = 0;
++}
++
++/* Put result from CTX in first 20 bytes following RESBUF. The result
++ must be in little endian byte order.
++
++ IMPORTANT: On some systems it is required that RESBUF is correctly
++ aligned for a 32 bits value. */
++void *
++sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf)
++{
++ ((md5_uint32 *) resbuf)[0] = SWAP (ctx->A);
++ ((md5_uint32 *) resbuf)[1] = SWAP (ctx->B);
++ ((md5_uint32 *) resbuf)[2] = SWAP (ctx->C);
++ ((md5_uint32 *) resbuf)[3] = SWAP (ctx->D);
++ ((md5_uint32 *) resbuf)[4] = SWAP (ctx->E);
++
++ return resbuf;
++}
++
++/* Process the remaining bytes in the internal buffer and the usual
++ prolog according to the standard and write the result to RESBUF.
++
++ IMPORTANT: On some systems it is required that RESBUF is correctly
++ aligned for a 32 bits value. */
++void *
++sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf)
++{
++ /* Take yet unprocessed bytes into account. */
++ md5_uint32 bytes = ctx->buflen;
++ size_t pad;
++
++ /* Now count remaining bytes. */
++ ctx->total[0] += bytes;
++ if (ctx->total[0] < bytes)
++ ++ctx->total[1];
++
++ pad = bytes >= 56 ? 64 + 56 - bytes : 56 - bytes;
++ memcpy (&ctx->buffer[bytes], fillbuf, pad);
++
++ /* Put the 64-bit file length in *bits* at the end of the buffer. */
++ *(md5_uint32 *) &ctx->buffer[bytes + pad + 4] = SWAP (ctx->total[0] << 3);
++ *(md5_uint32 *) &ctx->buffer[bytes + pad] = SWAP ((ctx->total[1] << 3) |
++ (ctx->total[0] >> 29));
++
++ /* Process last bytes. */
++ sha1_process_block (ctx->buffer, bytes + pad + 8, ctx);
++
++ return sha1_read_ctx (ctx, resbuf);
++}
++
++/* Compute SHA1 message digest for bytes read from STREAM. The
++ resulting message digest number will be written into the 16 bytes
++ beginning at RESBLOCK. */
++int
++sha1_stream (FILE *stream, void *resblock)
++{
++ struct sha1_ctx ctx;
++ char buffer[BLOCKSIZE + 72];
++ size_t sum;
++
++ /* Initialize the computation context. */
++ sha1_init_ctx (&ctx);
++
++ /* Iterate over full file contents. */
++ while (1)
++ {
++ /* We read the file in blocks of BLOCKSIZE bytes. One call of the
++ computation function processes the whole buffer so that with the
++ next round of the loop another block can be read. */
++ size_t n;
++ sum = 0;
++
++ /* Read block. Take care for partial reads. */
++ while (1)
++ {
++ n = fread (buffer + sum, 1, BLOCKSIZE - sum, stream);
++
++ sum += n;
++
++ if (sum == BLOCKSIZE)
++ break;
++
++ if (n == 0)
++ {
++ /* Check for the error flag IFF N == 0, so that we don't
++ exit the loop after a partial read due to e.g., EAGAIN
++ or EWOULDBLOCK. */
++ if (ferror (stream))
++ return 1;
++ goto process_partial_block;
++ }
++
++ /* We've read at least one byte, so ignore errors. But always
++ check for EOF, since feof may be true even though N > 0.
++ Otherwise, we could end up calling fread after EOF. */
++ if (feof (stream))
++ goto process_partial_block;
++ }
++
++ /* Process buffer with BLOCKSIZE bytes. Note that
++ BLOCKSIZE % 64 == 0
++ */
++ sha1_process_block (buffer, BLOCKSIZE, &ctx);
++ }
++
++ process_partial_block:;
++
++ /* Process any remaining bytes. */
++ if (sum > 0)
++ sha1_process_bytes (buffer, sum, &ctx);
++
++ /* Construct result in desired memory. */
++ sha1_finish_ctx (&ctx, resblock);
++ return 0;
++}
++
++/* Compute MD5 message digest for LEN bytes beginning at BUFFER. The
++ result is always in little endian byte order, so that a byte-wise
++ output yields to the wanted ASCII representation of the message
++ digest. */
++void *
++sha1_buffer (const char *buffer, size_t len, void *resblock)
++{
++ struct sha1_ctx ctx;
++
++ /* Initialize the computation context. */
++ sha1_init_ctx (&ctx);
++
++ /* Process whole buffer but last len % 64 bytes. */
++ sha1_process_bytes (buffer, len, &ctx);
++
++ /* Put result in desired memory area. */
++ return sha1_finish_ctx (&ctx, resblock);
++}
++
++void
++sha1_process_bytes (const void *buffer, size_t len, struct sha1_ctx *ctx)
++{
++ /* When we already have some bits in our internal buffer concatenate
++ both inputs first. */
++ if (ctx->buflen != 0)
++ {
++ size_t left_over = ctx->buflen;
++ size_t add = 128 - left_over > len ? len : 128 - left_over;
++
++ memcpy (&ctx->buffer[left_over], buffer, add);
++ ctx->buflen += add;
++
++ if (ctx->buflen > 64)
++ {
++ sha1_process_block (ctx->buffer, ctx->buflen & ~63, ctx);
++
++ ctx->buflen &= 63;
++ /* The regions in the following copy operation cannot overlap. */
++ memcpy (ctx->buffer, &ctx->buffer[(left_over + add) & ~63],
++ ctx->buflen);
++ }
++
++ buffer = (const char *) buffer + add;
++ len -= add;
++ }
++
++ /* Process available complete blocks. */
++ if (len >= 64)
++ {
++#if !_STRING_ARCH_unaligned
++# define alignof(type) offsetof (struct { char c; type x; }, x)
++# define UNALIGNED_P(p) (((size_t) p) % alignof (md5_uint32) != 0)
++ if (UNALIGNED_P (buffer))
++ while (len > 64)
++ {
++ sha1_process_block (memcpy (ctx->buffer, buffer, 64), 64, ctx);
++ buffer = (const char *) buffer + 64;
++ len -= 64;
++ }
++ else
++#endif
++ {
++ sha1_process_block (buffer, len & ~63, ctx);
++ buffer = (const char *) buffer + (len & ~63);
++ len &= 63;
++ }
++ }
++
++ /* Move remaining bytes in internal buffer. */
++ if (len > 0)
++ {
++ size_t left_over = ctx->buflen;
++
++ memcpy (&ctx->buffer[left_over], buffer, len);
++ left_over += len;
++ if (left_over >= 64)
++ {
++ sha1_process_block (ctx->buffer, 64, ctx);
++ left_over -= 64;
++ memcpy (ctx->buffer, &ctx->buffer[64], left_over);
++ }
++ ctx->buflen = left_over;
++ }
++}
++
++/* --- Code below is the primary difference between md5.c and sha1.c --- */
++
++/* SHA1 round constants */
++#define K1 0x5a827999L
++#define K2 0x6ed9eba1L
++#define K3 0x8f1bbcdcL
++#define K4 0xca62c1d6L
++
++/* Round functions. Note that F2 is the same as F4. */
++#define F1(B,C,D) ( D ^ ( B & ( C ^ D ) ) )
++#define F2(B,C,D) (B ^ C ^ D)
++#define F3(B,C,D) ( ( B & C ) | ( D & ( B | C ) ) )
++#define F4(B,C,D) (B ^ C ^ D)
++
++/* Process LEN bytes of BUFFER, accumulating context into CTX.
++ It is assumed that LEN % 64 == 0.
++ Most of this code comes from GnuPG's cipher/sha1.c. */
++
++void
++sha1_process_block (const void *buffer, size_t len, struct sha1_ctx *ctx)
++{
++ const md5_uint32 *words = buffer;
++ size_t nwords = len / sizeof (md5_uint32);
++ const md5_uint32 *endp = words + nwords;
++ md5_uint32 x[16];
++ md5_uint32 a = ctx->A;
++ md5_uint32 b = ctx->B;
++ md5_uint32 c = ctx->C;
++ md5_uint32 d = ctx->D;
++ md5_uint32 e = ctx->E;
++
++ /* First increment the byte count. RFC 1321 specifies the possible
++ length of the file up to 2^64 bits. Here we only compute the
++ number of bytes. Do a double word increment. */
++ ctx->total[0] += len;
++ if (ctx->total[0] < len)
++ ++ctx->total[1];
++
++#define rol(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
++
++#define M(I) ( tm = x[I&0x0f] ^ x[(I-14)&0x0f] \
++ ^ x[(I-8)&0x0f] ^ x[(I-3)&0x0f] \
++ , (x[I&0x0f] = rol(tm, 1)) )
++
++#define R(A,B,C,D,E,F,K,M) do { E += rol( A, 5 ) \
++ + F( B, C, D ) \
++ + K \
++ + M; \
++ B = rol( B, 30 ); \
++ } while(0)
++
++ while (words < endp)
++ {
++ md5_uint32 tm;
++ int t;
++ for (t = 0; t < 16; t++)
++ {
++ x[t] = SWAP (*words);
++ words++;
++ }
++
++ R( a, b, c, d, e, F1, K1, x[ 0] );
++ R( e, a, b, c, d, F1, K1, x[ 1] );
++ R( d, e, a, b, c, F1, K1, x[ 2] );
++ R( c, d, e, a, b, F1, K1, x[ 3] );
++ R( b, c, d, e, a, F1, K1, x[ 4] );
++ R( a, b, c, d, e, F1, K1, x[ 5] );
++ R( e, a, b, c, d, F1, K1, x[ 6] );
++ R( d, e, a, b, c, F1, K1, x[ 7] );
++ R( c, d, e, a, b, F1, K1, x[ 8] );
++ R( b, c, d, e, a, F1, K1, x[ 9] );
++ R( a, b, c, d, e, F1, K1, x[10] );
++ R( e, a, b, c, d, F1, K1, x[11] );
++ R( d, e, a, b, c, F1, K1, x[12] );
++ R( c, d, e, a, b, F1, K1, x[13] );
++ R( b, c, d, e, a, F1, K1, x[14] );
++ R( a, b, c, d, e, F1, K1, x[15] );
++ R( e, a, b, c, d, F1, K1, M(16) );
++ R( d, e, a, b, c, F1, K1, M(17) );
++ R( c, d, e, a, b, F1, K1, M(18) );
++ R( b, c, d, e, a, F1, K1, M(19) );
++ R( a, b, c, d, e, F2, K2, M(20) );
++ R( e, a, b, c, d, F2, K2, M(21) );
++ R( d, e, a, b, c, F2, K2, M(22) );
++ R( c, d, e, a, b, F2, K2, M(23) );
++ R( b, c, d, e, a, F2, K2, M(24) );
++ R( a, b, c, d, e, F2, K2, M(25) );
++ R( e, a, b, c, d, F2, K2, M(26) );
++ R( d, e, a, b, c, F2, K2, M(27) );
++ R( c, d, e, a, b, F2, K2, M(28) );
++ R( b, c, d, e, a, F2, K2, M(29) );
++ R( a, b, c, d, e, F2, K2, M(30) );
++ R( e, a, b, c, d, F2, K2, M(31) );
++ R( d, e, a, b, c, F2, K2, M(32) );
++ R( c, d, e, a, b, F2, K2, M(33) );
++ R( b, c, d, e, a, F2, K2, M(34) );
++ R( a, b, c, d, e, F2, K2, M(35) );
++ R( e, a, b, c, d, F2, K2, M(36) );
++ R( d, e, a, b, c, F2, K2, M(37) );
++ R( c, d, e, a, b, F2, K2, M(38) );
++ R( b, c, d, e, a, F2, K2, M(39) );
++ R( a, b, c, d, e, F3, K3, M(40) );
++ R( e, a, b, c, d, F3, K3, M(41) );
++ R( d, e, a, b, c, F3, K3, M(42) );
++ R( c, d, e, a, b, F3, K3, M(43) );
++ R( b, c, d, e, a, F3, K3, M(44) );
++ R( a, b, c, d, e, F3, K3, M(45) );
++ R( e, a, b, c, d, F3, K3, M(46) );
++ R( d, e, a, b, c, F3, K3, M(47) );
++ R( c, d, e, a, b, F3, K3, M(48) );
++ R( b, c, d, e, a, F3, K3, M(49) );
++ R( a, b, c, d, e, F3, K3, M(50) );
++ R( e, a, b, c, d, F3, K3, M(51) );
++ R( d, e, a, b, c, F3, K3, M(52) );
++ R( c, d, e, a, b, F3, K3, M(53) );
++ R( b, c, d, e, a, F3, K3, M(54) );
++ R( a, b, c, d, e, F3, K3, M(55) );
++ R( e, a, b, c, d, F3, K3, M(56) );
++ R( d, e, a, b, c, F3, K3, M(57) );
++ R( c, d, e, a, b, F3, K3, M(58) );
++ R( b, c, d, e, a, F3, K3, M(59) );
++ R( a, b, c, d, e, F4, K4, M(60) );
++ R( e, a, b, c, d, F4, K4, M(61) );
++ R( d, e, a, b, c, F4, K4, M(62) );
++ R( c, d, e, a, b, F4, K4, M(63) );
++ R( b, c, d, e, a, F4, K4, M(64) );
++ R( a, b, c, d, e, F4, K4, M(65) );
++ R( e, a, b, c, d, F4, K4, M(66) );
++ R( d, e, a, b, c, F4, K4, M(67) );
++ R( c, d, e, a, b, F4, K4, M(68) );
++ R( b, c, d, e, a, F4, K4, M(69) );
++ R( a, b, c, d, e, F4, K4, M(70) );
++ R( e, a, b, c, d, F4, K4, M(71) );
++ R( d, e, a, b, c, F4, K4, M(72) );
++ R( c, d, e, a, b, F4, K4, M(73) );
++ R( b, c, d, e, a, F4, K4, M(74) );
++ R( a, b, c, d, e, F4, K4, M(75) );
++ R( e, a, b, c, d, F4, K4, M(76) );
++ R( d, e, a, b, c, F4, K4, M(77) );
++ R( c, d, e, a, b, F4, K4, M(78) );
++ R( b, c, d, e, a, F4, K4, M(79) );
++
++ a = ctx->A += a;
++ b = ctx->B += b;
++ c = ctx->C += c;
++ d = ctx->D += d;
++ e = ctx->E += e;
++ }
++}
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/sha1.h busybox-1.7.4+gentoo+mdadm/mdadm/sha1.h
+--- busybox-1.7.4+gentoo/mdadm/sha1.h 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/sha1.h 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,87 @@
++/* Declarations of functions and data types used for SHA1 sum
++ library functions.
++ Copyright (C) 2000, 2001, 2003, 2005 Free Software Foundation, Inc.
++
++ This program is free software; you can redistribute it and/or modify it
++ under the terms of the GNU General Public License as published by the
++ Free Software Foundation; either version 2, or (at your option) any
++ later version.
++
++ This program is distributed in the hope that it will be useful,
++ but WITHOUT ANY WARRANTY; without even the implied warranty of
++ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ GNU General Public License for more details.
++
++ You should have received a copy of the GNU General Public License
++ along with this program; if not, write to the Free Software Foundation,
++ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
++
++#ifndef SHA1_H
++# define SHA1_H 1
++
++# include <stdio.h>
++# include "md5.h"
++
++/* Structure to save state of computation between the single steps. */
++struct sha1_ctx
++{
++ md5_uint32 A;
++ md5_uint32 B;
++ md5_uint32 C;
++ md5_uint32 D;
++ md5_uint32 E;
++
++ md5_uint32 total[2];
++ md5_uint32 buflen;
++ char buffer[128] __attribute__ ((__aligned__ (__alignof__ (md5_uint32))));
++};
++
++
++/* Initialize structure containing state of computation. */
++extern void sha1_init_ctx (struct sha1_ctx *ctx);
++
++/* Starting with the result of former calls of this function (or the
++ initialization function update the context for the next LEN bytes
++ starting at BUFFER.
++ It is necessary that LEN is a multiple of 64!!! */
++extern void sha1_process_block (const void *buffer, size_t len,
++ struct sha1_ctx *ctx);
++
++/* Starting with the result of former calls of this function (or the
++ initialization function update the context for the next LEN bytes
++ starting at BUFFER.
++ It is NOT required that LEN is a multiple of 64. */
++extern void sha1_process_bytes (const void *buffer, size_t len,
++ struct sha1_ctx *ctx);
++
++/* Process the remaining bytes in the buffer and put result from CTX
++ in first 20 bytes following RESBUF. The result is always in little
++ endian byte order, so that a byte-wise output yields to the wanted
++ ASCII representation of the message digest.
++
++ IMPORTANT: On some systems it is required that RESBUF be correctly
++ aligned for a 32 bits value. */
++extern void *sha1_finish_ctx (struct sha1_ctx *ctx, void *resbuf);
++
++
++/* Put result from CTX in first 20 bytes following RESBUF. The result is
++ always in little endian byte order, so that a byte-wise output yields
++ to the wanted ASCII representation of the message digest.
++
++ IMPORTANT: On some systems it is required that RESBUF is correctly
++ aligned for a 32 bits value. */
++extern void *sha1_read_ctx (const struct sha1_ctx *ctx, void *resbuf);
++
++
++/* Compute SHA1 message digest for bytes read from STREAM. The
++ resulting message digest number will be written into the 20 bytes
++ beginning at RESBLOCK. */
++extern int sha1_stream (FILE *stream, void *resblock);
++
++/* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The
++ result is always in little endian byte order, so that a byte-wise
++ output yields to the wanted ASCII representation of the message
++ digest. */
++extern void *sha1_buffer (const char *buffer, size_t len, void *resblock);
++
++#endif
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/super0.c busybox-1.7.4+gentoo+mdadm/mdadm/super0.c
+--- busybox-1.7.4+gentoo/mdadm/super0.c 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/super0.c 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,562 @@
++/*
++ * mdadm - manage Linux "md" devices aka RAID arrays.
++ *
++ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Author: Neil Brown
++ * Email: <neilb@cse.unsw.edu.au>
++ * Paper: Neil Brown
++ * School of Computer Science and Engineering
++ * The University of New South Wales
++ * Sydney, 2052
++ * Australia
++ */
++
++#define HAVE_STDINT_H 1
++#include "mdadm.h"
++/*
++ * All handling for the 0.90.0 version superblock is in
++ * this file.
++ * This includes:
++ * - finding, loading, and writing the superblock.
++ * - initialising a new superblock
++ * - printing the superblock for --examine
++ * - printing part of the superblock for --detail
++ * .. other stuff
++ */
++
++
++static unsigned long calc_sb0_csum(mdp_super_t *super)
++{
++ unsigned long csum = super->sb_csum;
++ unsigned long newcsum;
++ super->sb_csum= 0 ;
++ newcsum = calc_csum(super, MD_SB_BYTES);
++ super->sb_csum = csum;
++ return newcsum;
++}
++
++
++void super0_swap_endian(struct mdp_superblock_s *sb)
++{
++ /* as super0 superblocks are host-endian, it is sometimes
++ * useful to be able to swap the endianness
++ * as (almost) everything is u32's we byte-swap every 4byte
++ * number.
++ * We then also have to swap the events_hi and events_lo
++ */
++ char *sbc = (char *)sb;
++ __u32 t32;
++ int i;
++
++ for (i=0; i < MD_SB_BYTES ; i+=4) {
++ char t = sbc[i];
++ sbc[i] = sbc[i+3];
++ sbc[i+3] = t;
++ t=sbc[i+1];
++ sbc[i+1]=sbc[i+2];
++ sbc[i+2]=t;
++ }
++ t32 = sb->events_hi;
++ sb->events_hi = sb->events_lo;
++ sb->events_lo = t32;
++
++ t32 = sb->cp_events_hi;
++ sb->cp_events_hi = sb->cp_events_lo;
++ sb->cp_events_lo = t32;
++
++}
++
++static void brief_examine_super0(void *sbv)
++{
++ mdp_super_t *sb = sbv;
++ char *c=map_num(pers, sb->level);
++ char devname[20];
++
++ sprintf(devname, "/dev/md%d", sb->md_minor);
++
++ printf("ARRAY %s level=%s num-devices=%d UUID=",
++ devname,
++ c?c:"-unknown-", sb->raid_disks);
++ if (sb->minor_version >= 90)
++ printf("%08x:%08x:%08x:%08x", sb->set_uuid0, sb->set_uuid1,
++ sb->set_uuid2, sb->set_uuid3);
++ else
++ printf("%08x", sb->set_uuid0);
++ printf("\n");
++}
++
++static int match_home0(void *sbv, char *homehost)
++{
++ mdp_super_t *sb = sbv;
++ char buf[20];
++ char *hash = sha1_buffer(homehost,
++ strlen(homehost),
++ buf);
++
++ return (memcmp(&sb->set_uuid2, hash, 8)==0);
++}
++
++static void uuid_from_super0(int uuid[4], void * sbv)
++{
++ mdp_super_t *super = sbv;
++ uuid[0] = super->set_uuid0;
++ if (super->minor_version >= 90) {
++ uuid[1] = super->set_uuid1;
++ uuid[2] = super->set_uuid2;
++ uuid[3] = super->set_uuid3;
++ } else {
++ uuid[1] = 0;
++ uuid[2] = 0;
++ uuid[3] = 0;
++ }
++}
++
++static void getinfo_super0(struct mdinfo *info, void *sbv)
++{
++ mdp_super_t *sb = sbv;
++ int working = 0;
++ int i;
++
++ info->array.major_version = sb->major_version;
++ info->array.minor_version = sb->minor_version;
++ info->array.patch_version = sb->patch_version;
++ info->array.raid_disks = sb->raid_disks;
++ info->array.level = sb->level;
++ info->array.layout = sb->layout;
++ info->array.md_minor = sb->md_minor;
++ info->array.ctime = sb->ctime;
++ info->array.utime = sb->utime;
++ info->array.chunk_size = sb->chunk_size;
++ info->array.state = sb->state;
++ info->component_size = sb->size*2;
++
++ info->disk.state = sb->this_disk.state;
++ info->disk.major = sb->this_disk.major;
++ info->disk.minor = sb->this_disk.minor;
++ info->disk.raid_disk = sb->this_disk.raid_disk;
++ info->disk.number = sb->this_disk.number;
++
++ info->events = md_event(sb);
++ info->data_offset = 0;
++
++ uuid_from_super0(info->uuid, sbv);
++
++ if (sb->minor_version > 90 && (sb->reshape_position+1) != 0) {
++ info->reshape_active = 1;
++ info->reshape_progress = sb->reshape_position;
++ info->new_level = sb->new_level;
++ info->delta_disks = sb->delta_disks;
++ info->new_layout = sb->new_layout;
++ info->new_chunk = sb->new_chunk;
++ } else
++ info->reshape_active = 0;
++
++ sprintf(info->name, "%d", sb->md_minor);
++ /* work_disks is calculated rather than read directly */
++ for (i=0; i < MD_SB_DISKS; i++)
++ if ((sb->disks[i].state & (1<<MD_DISK_SYNC)) &&
++ (sb->disks[i].raid_disk < info->array.raid_disks) &&
++ (sb->disks[i].state & (1<<MD_DISK_ACTIVE)) &&
++ !(sb->disks[i].state & (1<<MD_DISK_FAULTY)))
++ working ++;
++ info->array.working_disks = working;
++}
++
++
++static int update_super0(struct mdinfo *info, void *sbv, char *update,
++ char *devname, int verbose,
++ int uuid_set, char *homehost)
++{
++ /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
++ * For others, the return value is ignored.
++ */
++ int rv = 0;
++ mdp_super_t *sb = sbv;
++ if (strcmp(update, "sparc2.2")==0 ) {
++ /* 2.2 sparc put the events in the wrong place
++ * So we copy the tail of the superblock
++ * up 4 bytes before continuing
++ */
++ __u32 *sb32 = (__u32*)sb;
++ memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7,
++ sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1,
++ (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4);
++ if (verbose >= 0)
++ fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n",
++ devname);
++ }
++ if (strcmp(update, "super-minor") ==0) {
++ sb->md_minor = info->array.md_minor;
++ if (verbose > 0)
++ fprintf(stderr, Name ": updating superblock of %s with minor number %d\n",
++ devname, info->array.md_minor);
++ }
++ if (strcmp(update, "summaries") == 0) {
++ int i;
++ /* set nr_disks, active_disks, working_disks,
++ * failed_disks, spare_disks based on disks[]
++ * array in superblock.
++ * Also make sure extra slots aren't 'failed'
++ */
++ sb->nr_disks = sb->active_disks =
++ sb->working_disks = sb->failed_disks =
++ sb->spare_disks = 0;
++ for (i=0; i < MD_SB_DISKS ; i++)
++ if (sb->disks[i].major ||
++ sb->disks[i].minor) {
++ int state = sb->disks[i].state;
++ if (state & (1<<MD_DISK_REMOVED))
++ continue;
++ sb->nr_disks++;
++ if (state & (1<<MD_DISK_ACTIVE))
++ sb->active_disks++;
++ if (state & (1<<MD_DISK_FAULTY))
++ sb->failed_disks++;
++ else
++ sb->working_disks++;
++ if (state == 0)
++ sb->spare_disks++;
++ } else if (i >= sb->raid_disks && sb->disks[i].number == 0)
++ sb->disks[i].state = 0;
++ }
++ if (strcmp(update, "force-one")==0) {
++ /* Not enough devices for a working array, so
++ * bring this one up-to-date.
++ */
++ __u32 ehi = sb->events_hi, elo = sb->events_lo;
++ sb->events_hi = (info->events>>32) & 0xFFFFFFFF;
++ sb->events_lo = (info->events) & 0xFFFFFFFF;
++ if (sb->events_hi != ehi ||
++ sb->events_lo != elo)
++ rv = 1;
++ }
++ if (strcmp(update, "force-array")==0) {
++ /* degraded array and 'force' requested, so
++ * maybe need to mark it 'clean'
++ */
++ if ((sb->level == 5 || sb->level == 4 || sb->level == 6) &&
++ (sb->state & (1 << MD_SB_CLEAN)) == 0) {
++ /* need to force clean */
++ sb->state |= (1 << MD_SB_CLEAN);
++ rv = 1;
++ }
++ }
++ if (strcmp(update, "assemble")==0) {
++ int d = info->disk.number;
++ int wonly = sb->disks[d].state & (1<<MD_DISK_WRITEMOSTLY);
++ if ((sb->disks[d].state & ~(1<<MD_DISK_WRITEMOSTLY))
++ != info->disk.state) {
++ sb->disks[d].state = info->disk.state | wonly;
++ rv = 1;
++ }
++ }
++ if (strcmp(update, "linear-grow-new") == 0) {
++ memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0]));
++ sb->disks[info->disk.number].number = info->disk.number;
++ sb->disks[info->disk.number].major = info->disk.major;
++ sb->disks[info->disk.number].minor = info->disk.minor;
++ sb->disks[info->disk.number].raid_disk = info->disk.raid_disk;
++ sb->disks[info->disk.number].state = info->disk.state;
++ sb->this_disk = sb->disks[info->disk.number];
++ }
++ if (strcmp(update, "linear-grow-update") == 0) {
++ sb->raid_disks = info->array.raid_disks;
++ sb->nr_disks = info->array.nr_disks;
++ sb->active_disks = info->array.active_disks;
++ sb->working_disks = info->array.working_disks;
++ memset(&sb->disks[info->disk.number], 0, sizeof(sb->disks[0]));
++ sb->disks[info->disk.number].number = info->disk.number;
++ sb->disks[info->disk.number].major = info->disk.major;
++ sb->disks[info->disk.number].minor = info->disk.minor;
++ sb->disks[info->disk.number].raid_disk = info->disk.raid_disk;
++ sb->disks[info->disk.number].state = info->disk.state;
++ }
++ if (strcmp(update, "resync") == 0) {
++ /* make sure resync happens */
++ sb->state &= ~(1<<MD_SB_CLEAN);
++ sb->recovery_cp = 0;
++ }
++ if (strcmp(update, "homehost") == 0 &&
++ homehost) {
++ uuid_set = 0;
++ update = "uuid";
++ info->uuid[0] = sb->set_uuid0;
++ info->uuid[1] = sb->set_uuid1;
++ }
++ if (strcmp(update, "uuid") == 0) {
++ if (!uuid_set && homehost) {
++ char buf[20];
++ char *hash = sha1_buffer(homehost,
++ strlen(homehost),
++ buf);
++ memcpy(info->uuid+2, hash, 8);
++ }
++ sb->set_uuid0 = info->uuid[0];
++ sb->set_uuid1 = info->uuid[1];
++ sb->set_uuid2 = info->uuid[2];
++ sb->set_uuid3 = info->uuid[3];
++ if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) {
++ struct bitmap_super_s *bm;
++ bm = (struct bitmap_super_s*)(sb+1);
++ uuid_from_super0((int*)bm->uuid, sbv);
++ }
++ }
++ if (strcmp(update, "_reshape_progress")==0)
++ sb->reshape_position = info->reshape_progress;
++
++ sb->sb_csum = calc_sb0_csum(sb);
++ return rv;
++}
++
++static int store_super0(struct supertype *st, int fd, void *sbv)
++{
++ unsigned long long dsize;
++ unsigned long long offset;
++ mdp_super_t *super = sbv;
++
++ if (!get_dev_size(fd, NULL, &dsize))
++ return 1;
++
++ if (dsize < MD_RESERVED_SECTORS*2*512)
++ return 2;
++
++ offset = MD_NEW_SIZE_SECTORS(dsize>>9);
++
++ offset *= 512;
++
++ if (lseek64(fd, offset, 0)< 0LL)
++ return 3;
++
++ if (write(fd, super, sizeof(*super)) != sizeof(*super))
++ return 4;
++
++ if (super->state & (1<<MD_SB_BITMAP_PRESENT)) {
++ struct bitmap_super_s * bm = (struct bitmap_super_s*)(super+1);
++ if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC)
++ if (write(fd, bm, sizeof(*bm)) != sizeof(*bm))
++ return 5;
++ }
++
++ fsync(fd);
++ return 0;
++}
++
++static int compare_super0(void **firstp, void *secondv)
++{
++ /*
++ * return:
++ * 0 same, or first was empty, and second was copied
++ * 1 second had wrong number
++ * 2 wrong uuid
++ * 3 wrong other info
++ */
++ mdp_super_t *first = *firstp;
++ mdp_super_t *second = secondv;
++
++ int uuid1[4], uuid2[4];
++ if (second->md_magic != MD_SB_MAGIC)
++ return 1;
++ if (!first) {
++ first = malloc(MD_SB_BYTES + sizeof(struct bitmap_super_s));
++ memcpy(first, second, MD_SB_BYTES + sizeof(struct bitmap_super_s));
++ *firstp = first;
++ return 0;
++ }
++
++ uuid_from_super0(uuid1, first);
++ uuid_from_super0(uuid2, second);
++ if (!same_uuid(uuid1, uuid2, 0))
++ return 2;
++ if (first->major_version != second->major_version ||
++ first->minor_version != second->minor_version ||
++ first->patch_version != second->patch_version ||
++ first->gvalid_words != second->gvalid_words ||
++ first->ctime != second->ctime ||
++ first->level != second->level ||
++ first->size != second->size ||
++ first->raid_disks != second->raid_disks )
++ return 3;
++
++ return 0;
++}
++
++
++static int load_super0(struct supertype *st, int fd, void **sbp, char *devname)
++{
++ /* try to read in the superblock
++ * Return:
++ * 0 on success
++ * 1 on cannot get superblock
++ * 2 on superblock meaningless
++ */
++ unsigned long long dsize;
++ unsigned long long offset;
++ mdp_super_t *super;
++ int uuid[4];
++ struct bitmap_super_s *bsb;
++
++ if (!get_dev_size(fd, devname, &dsize))
++ return 1;
++
++ if (dsize < MD_RESERVED_SECTORS*512 * 2) {
++ if (devname)
++ fprintf(stderr, Name
++ ": %s is too small for md: size is %llu sectors.\n",
++ devname, dsize);
++ return 1;
++ }
++
++ offset = MD_NEW_SIZE_SECTORS(dsize>>9);
++
++ offset *= 512;
++
++ ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
++
++ if (lseek64(fd, offset, 0)< 0LL) {
++ if (devname)
++ fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
++ devname, strerror(errno));
++ return 1;
++ }
++
++ super = malloc(MD_SB_BYTES + sizeof(bitmap_super_t));
++
++ if (read(fd, super, sizeof(*super)) != MD_SB_BYTES) {
++ if (devname)
++ fprintf(stderr, Name ": Cannot read superblock on %s\n",
++ devname);
++ free(super);
++ return 1;
++ }
++
++ if (st->ss && st->minor_version == 9)
++ super0_swap_endian(super);
++
++ if (super->md_magic != MD_SB_MAGIC) {
++ if (devname)
++ fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
++ devname, MD_SB_MAGIC, super->md_magic);
++ free(super);
++ return 2;
++ }
++
++ if (super->major_version != 0) {
++ if (devname)
++ fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
++ devname, super->major_version);
++ free(super);
++ return 2;
++ }
++ *sbp = super;
++ if (st->ss == NULL) {
++ st->ss = &super0;
++ st->minor_version = 90;
++ st->max_devs = MD_SB_DISKS;
++ }
++
++ /* Now check on the bitmap superblock */
++ if ((super->state & (1<<MD_SB_BITMAP_PRESENT)) == 0)
++ return 0;
++ /* Read the bitmap superblock and make sure it looks
++ * valid. If it doesn't clear the bit. An --assemble --force
++ * should get that written out.
++ */
++ if (read(fd, super+1, sizeof(struct bitmap_super_s))
++ != sizeof(struct bitmap_super_s))
++ goto no_bitmap;
++
++ uuid_from_super0(uuid, super);
++ bsb = (struct bitmap_super_s *)(super+1);
++ if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
++ memcmp(bsb->uuid, uuid, 16) != 0)
++ goto no_bitmap;
++ return 0;
++
++ no_bitmap:
++ super->state &= ~(1<<MD_SB_BITMAP_PRESENT);
++
++ return 0;
++}
++
++static struct supertype *match_metadata_desc0(char *arg)
++{
++ struct supertype *st = malloc(sizeof(*st));
++ if (!st) return st;
++
++ st->ss = &super0;
++ st->minor_version = 90;
++ st->max_devs = MD_SB_DISKS;
++ if (strcmp(arg, "0") == 0 ||
++ strcmp(arg, "0.90") == 0 ||
++ strcmp(arg, "default") == 0
++ )
++ return st;
++
++ st->minor_version = 9; /* flag for 'byte-swapped' */
++ if (strcmp(arg, "0.swap")==0)
++ return st;
++
++ free(st);
++ return NULL;
++}
++
++void locate_bitmap0(struct supertype *st, int fd, void *sbv)
++{
++ unsigned long long dsize;
++ unsigned long long offset;
++
++ if (!get_dev_size(fd, NULL, &dsize))
++ return;
++
++ if (dsize < MD_RESERVED_SECTORS*512 * 2)
++ return;
++
++ offset = MD_NEW_SIZE_SECTORS(dsize>>9);
++
++ offset *= 512;
++
++ offset += MD_SB_BYTES;
++
++ lseek64(fd, offset, 0);
++}
++
++struct superswitch super0 = {
++ .examine_super = NULL,
++ .brief_examine_super = brief_examine_super0,
++ .detail_super = NULL,
++ .brief_detail_super = NULL,
++ .export_super = NULL,
++ .match_home = match_home0,
++ .uuid_from_super = uuid_from_super0,
++ .getinfo_super = getinfo_super0,
++ .update_super = update_super0,
++ .init_super = NULL,
++ .add_to_super = NULL,
++ .store_super = store_super0,
++ .write_init_super = NULL,
++ .compare_super = compare_super0,
++ .load_super = load_super0,
++ .match_metadata_desc = match_metadata_desc0,
++ .avail_size = NULL,
++ .add_internal_bitmap = NULL,
++ .locate_bitmap = locate_bitmap0,
++ .write_bitmap = NULL,
++ .major = 0,
++ .swapuuid = 0,
++};
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/super1.c busybox-1.7.4+gentoo+mdadm/mdadm/super1.c
+--- busybox-1.7.4+gentoo/mdadm/super1.c 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/super1.c 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,731 @@
++/*
++ * mdadm - manage Linux "md" devices aka RAID arrays.
++ *
++ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Author: Neil Brown
++ * Email: <neilb@cse.unsw.edu.au>
++ * Paper: Neil Brown
++ * School of Computer Science and Engineering
++ * The University of New South Wales
++ * Sydney, 2052
++ * Australia
++ */
++
++#include "mdadm.h"
++/*
++ * The version-1 superblock :
++ * All numeric fields are little-endian.
++ *
++ * total size: 256 bytes plus 2 per device.
++ * 1K allows 384 devices.
++ */
++struct mdp_superblock_1 {
++ /* constant array information - 128 bytes */
++ __u32 magic; /* MD_SB_MAGIC: 0xa92b4efc - little endian */
++ __u32 major_version; /* 1 */
++ __u32 feature_map; /* 0 for now */
++ __u32 pad0; /* always set to 0 when writing */
++
++ __u8 set_uuid[16]; /* user-space generated. */
++ char set_name[32]; /* set and interpreted by user-space */
++
++ __u64 ctime; /* lo 40 bits are seconds, top 24 are microseconds or 0*/
++ __u32 level; /* -4 (multipath), -1 (linear), 0,1,4,5 */
++ __u32 layout; /* only for raid5 currently */
++ __u64 size; /* used size of component devices, in 512byte sectors */
++
++ __u32 chunksize; /* in 512byte sectors */
++ __u32 raid_disks;
++ __u32 bitmap_offset; /* sectors after start of superblock that bitmap starts
++ * NOTE: signed, so bitmap can be before superblock
++ * only meaningful of feature_map[0] is set.
++ */
++
++ /* These are only valid with feature bit '4' */
++ __u32 new_level; /* new level we are reshaping to */
++ __u64 reshape_position; /* next address in array-space for reshape */
++ __u32 delta_disks; /* change in number of raid_disks */
++ __u32 new_layout; /* new layout */
++ __u32 new_chunk; /* new chunk size (bytes) */
++ __u8 pad1[128-124]; /* set to 0 when written */
++
++ /* constant this-device information - 64 bytes */
++ __u64 data_offset; /* sector start of data, often 0 */
++ __u64 data_size; /* sectors in this device that can be used for data */
++ __u64 super_offset; /* sector start of this superblock */
++ __u64 recovery_offset;/* sectors before this offset (from data_offset) have been recovered */
++ __u32 dev_number; /* permanent identifier of this device - not role in raid */
++ __u32 cnt_corrected_read; /* number of read errors that were corrected by re-writing */
++ __u8 device_uuid[16]; /* user-space setable, ignored by kernel */
++ __u8 devflags; /* per-device flags. Only one defined...*/
++#define WriteMostly1 1 /* mask for writemostly flag in above */
++ __u8 pad2[64-57]; /* set to 0 when writing */
++
++ /* array state information - 64 bytes */
++ __u64 utime; /* 40 bits second, 24 btes microseconds */
++ __u64 events; /* incremented when superblock updated */
++ __u64 resync_offset; /* data before this offset (from data_offset) known to be in sync */
++ __u32 sb_csum; /* checksum upto devs[max_dev] */
++ __u32 max_dev; /* size of devs[] array to consider */
++ __u8 pad3[64-32]; /* set to 0 when writing */
++
++ /* device state information. Indexed by dev_number.
++ * 2 bytes per device
++ * Note there are no per-device state flags. State information is rolled
++ * into the 'roles' value. If a device is spare or faulty, then it doesn't
++ * have a meaningful role.
++ */
++ __u16 dev_roles[0]; /* role in array, or 0xffff for a spare, or 0xfffe for faulty */
++};
++
++struct misc_dev_info {
++ __u64 device_size;
++};
++
++/* feature_map bits */
++#define MD_FEATURE_BITMAP_OFFSET 1
++#define MD_FEATURE_RECOVERY_OFFSET 2 /* recovery_offset is present and
++ * must be honoured
++ */
++#define MD_FEATURE_RESHAPE_ACTIVE 4
++
++#define MD_FEATURE_ALL (1|2|4)
++
++#ifndef offsetof
++#define offsetof(t,f) ((size_t)&(((t*)0)->f))
++#endif
++static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
++{
++ unsigned int disk_csum, csum;
++ unsigned long long newcsum;
++ int size = sizeof(*sb) + __le32_to_cpu(sb->max_dev)*2;
++ unsigned int *isuper = (unsigned int*)sb;
++ int i;
++
++/* make sure I can count... */
++ if (offsetof(struct mdp_superblock_1,data_offset) != 128 ||
++ offsetof(struct mdp_superblock_1, utime) != 192 ||
++ sizeof(struct mdp_superblock_1) != 256) {
++ fprintf(stderr, "WARNING - superblock isn't sized correctly\n");
++ }
++
++ disk_csum = sb->sb_csum;
++ sb->sb_csum = 0;
++ newcsum = 0;
++ for (i=0; size>=4; size -= 4 ) {
++ newcsum += __le32_to_cpu(*isuper);
++ isuper++;
++ }
++
++ if (size == 2)
++ newcsum += __le16_to_cpu(*(unsigned short*) isuper);
++
++ csum = (newcsum & 0xffffffff) + (newcsum >> 32);
++ sb->sb_csum = disk_csum;
++ return __cpu_to_le32(csum);
++}
++
++static void brief_examine_super1(void *sbv)
++{
++ struct mdp_superblock_1 *sb = sbv;
++ int i;
++ unsigned long long sb_offset;
++ char *nm;
++ char *c=map_num(pers, __le32_to_cpu(sb->level));
++
++ nm = strchr(sb->set_name, ':');
++ if (nm)
++ nm++;
++ else if (sb->set_name[0])
++ nm = sb->set_name;
++ else
++ nm = "??";
++
++ printf("ARRAY /dev/md%s level=%s ", nm, c?c:"-unknown-");
++ sb_offset = __le64_to_cpu(sb->super_offset);
++ if (sb_offset <= 4)
++ printf("metadata=1.1 ");
++ else if (sb_offset <= 8)
++ printf("metadata=1.2 ");
++ else
++ printf("metadata=1.0 ");
++ printf("num-devices=%d UUID=", __le32_to_cpu(sb->raid_disks));
++ for (i=0; i<16; i++) {
++ if ((i&3)==0 && i != 0) printf(":");
++ printf("%02x", sb->set_uuid[i]);
++ }
++ if (sb->set_name[0])
++ printf(" name=%.32s", sb->set_name);
++ printf("\n");
++}
++
++static int match_home1(void *sbv, char *homehost)
++{
++ struct mdp_superblock_1 *sb = sbv;
++ int l = homehost ? strlen(homehost) : 0;
++
++ return (l > 0 && l < 32 &&
++ sb->set_name[l] == ':' &&
++ strncmp(sb->set_name, homehost, l) == 0);
++}
++
++static void uuid_from_super1(int uuid[4], void * sbv)
++{
++ struct mdp_superblock_1 *super = sbv;
++ char *cuuid = (char*)uuid;
++ int i;
++ for (i=0; i<16; i++)
++ cuuid[i] = super->set_uuid[i];
++}
++
++static void getinfo_super1(struct mdinfo *info, void *sbv)
++{
++ struct mdp_superblock_1 *sb = sbv;
++ int working = 0;
++ int i;
++ int role;
++
++ info->array.major_version = 1;
++ info->array.minor_version = __le32_to_cpu(sb->feature_map);
++ info->array.patch_version = 0;
++ info->array.raid_disks = __le32_to_cpu(sb->raid_disks);
++ info->array.level = __le32_to_cpu(sb->level);
++ info->array.layout = __le32_to_cpu(sb->layout);
++ info->array.md_minor = -1;
++ info->array.ctime = __le64_to_cpu(sb->ctime);
++ info->array.utime = __le64_to_cpu(sb->utime);
++ info->array.chunk_size = __le32_to_cpu(sb->chunksize)*512;
++ info->array.state =
++ (__le64_to_cpu(sb->resync_offset) >= __le64_to_cpu(sb->size))
++ ? 1 : 0;
++
++ info->data_offset = __le64_to_cpu(sb->data_offset);
++ info->component_size = __le64_to_cpu(sb->size);
++
++ info->disk.major = 0;
++ info->disk.minor = 0;
++ info->disk.number = __le32_to_cpu(sb->dev_number);
++ if (__le32_to_cpu(sb->dev_number) >= __le32_to_cpu(sb->max_dev) ||
++ __le32_to_cpu(sb->max_dev) > 512)
++ role = 0xfffe;
++ else
++ role = __le16_to_cpu(sb->dev_roles[__le32_to_cpu(sb->dev_number)]);
++
++ info->disk.raid_disk = -1;
++ switch(role) {
++ case 0xFFFF:
++ info->disk.state = 2; /* spare: ACTIVE, not sync, not faulty */
++ break;
++ case 0xFFFE:
++ info->disk.state = 1; /* faulty */
++ break;
++ default:
++ info->disk.state = 6; /* active and in sync */
++ info->disk.raid_disk = role;
++ }
++ info->events = __le64_to_cpu(sb->events);
++
++ memcpy(info->uuid, sb->set_uuid, 16);
++
++ strncpy(info->name, sb->set_name, 32);
++ info->name[32] = 0;
++
++ if (sb->feature_map & __le32_to_cpu(MD_FEATURE_RESHAPE_ACTIVE)) {
++ info->reshape_active = 1;
++ info->reshape_progress = __le64_to_cpu(sb->reshape_position);
++ info->new_level = __le32_to_cpu(sb->new_level);
++ info->delta_disks = __le32_to_cpu(sb->delta_disks);
++ info->new_layout = __le32_to_cpu(sb->new_layout);
++ info->new_chunk = __le32_to_cpu(sb->new_chunk)<<9;
++ } else
++ info->reshape_active = 0;
++
++ for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
++ role = __le16_to_cpu(sb->dev_roles[i]);
++ if (/*role == 0xFFFF || */role < info->array.raid_disks)
++ working++;
++ }
++
++ info->array.working_disks = working;
++}
++
++static int update_super1(struct mdinfo *info, void *sbv, char *update,
++ char *devname, int verbose,
++ int uuid_set, char *homehost)
++{
++ /* NOTE: for 'assemble' and 'force' we need to return non-zero if any change was made.
++ * For others, the return value is ignored.
++ */
++ int rv = 0;
++ struct mdp_superblock_1 *sb = sbv;
++
++ if (strcmp(update, "force-one")==0) {
++ /* Not enough devices for a working array,
++ * so bring this one up-to-date
++ */
++ if (sb->events != __cpu_to_le64(info->events))
++ rv = 1;
++ sb->events = __cpu_to_le64(info->events);
++ }
++ if (strcmp(update, "force-array")==0) {
++ /* Degraded array and 'force' requests to
++ * maybe need to mark it 'clean'.
++ */
++ switch(__le32_to_cpu(sb->level)) {
++ case 5: case 4: case 6:
++ /* need to force clean */
++ if (sb->resync_offset != ~0ULL)
++ rv = 1;
++ sb->resync_offset = ~0ULL;
++ }
++ }
++ if (strcmp(update, "assemble")==0) {
++ int d = info->disk.number;
++ int want;
++ if (info->disk.state == 6)
++ want = __cpu_to_le32(info->disk.raid_disk);
++ else
++ want = 0xFFFF;
++ if (sb->dev_roles[d] != want) {
++ sb->dev_roles[d] = want;
++ rv = 1;
++ }
++ }
++ if (strcmp(update, "linear-grow-new") == 0) {
++ int i;
++ int rfd;
++ int max = __le32_to_cpu(sb->max_dev);
++
++ for (i=0 ; i < max ; i++)
++ if (__le16_to_cpu(sb->dev_roles[i]) >= 0xfffe)
++ break;
++ sb->dev_number = __cpu_to_le32(i);
++ info->disk.number = i;
++ if (max >= __le32_to_cpu(sb->max_dev))
++ sb->max_dev = __cpu_to_le32(max+1);
++
++ if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
++ read(rfd, sb->device_uuid, 16) != 16) {
++ *(__u32*)(sb->device_uuid) = random();
++ *(__u32*)(sb->device_uuid+4) = random();
++ *(__u32*)(sb->device_uuid+8) = random();
++ *(__u32*)(sb->device_uuid+12) = random();
++ }
++
++ sb->dev_roles[i] =
++ __cpu_to_le16(info->disk.raid_disk);
++ }
++ if (strcmp(update, "linear-grow-update") == 0) {
++ sb->raid_disks = __cpu_to_le32(info->array.raid_disks);
++ sb->dev_roles[info->disk.number] =
++ __cpu_to_le16(info->disk.raid_disk);
++ }
++ if (strcmp(update, "resync") == 0) {
++ /* make sure resync happens */
++ sb->resync_offset = 0ULL;
++ }
++ if (strcmp(update, "uuid") == 0) {
++ copy_uuid(sb->set_uuid, info->uuid, super1.swapuuid);
++
++ if (__le32_to_cpu(sb->feature_map)&MD_FEATURE_BITMAP_OFFSET) {
++ struct bitmap_super_s *bm;
++ bm = (struct bitmap_super_s*)(sbv+1024);
++ memcpy(bm->uuid, sb->set_uuid, 16);
++ }
++ }
++ if (strcmp(update, "homehost") == 0 &&
++ homehost) {
++ char *c;
++ update = "name";
++ c = strchr(sb->set_name, ':');
++ if (c)
++ strncpy(info->name, c+1, 31 - (c-sb->set_name));
++ else
++ strncpy(info->name, sb->set_name, 32);
++ info->name[32] = 0;
++ }
++ if (strcmp(update, "name") == 0) {
++ if (info->name[0] == 0)
++ sprintf(info->name, "%d", info->array.md_minor);
++ memset(sb->set_name, 0, sizeof(sb->set_name));
++ if (homehost &&
++ strchr(info->name, ':') == NULL &&
++ strlen(homehost)+1+strlen(info->name) < 32) {
++ strcpy(sb->set_name, homehost);
++ strcat(sb->set_name, ":");
++ strcat(sb->set_name, info->name);
++ } else
++ strcpy(sb->set_name, info->name);
++ }
++ if (strcmp(update, "devicesize") == 0 &&
++ __le64_to_cpu(sb->super_offset) <
++ __le64_to_cpu(sb->data_offset)) {
++ /* set data_size to device size less data_offset */
++ struct misc_dev_info *misc = (struct misc_dev_info*)
++ (sbv + 1024 + sizeof(struct bitmap_super_s));
++ printf("Size was %llu\n", (unsigned long long)
++ __le64_to_cpu(sb->data_size));
++ sb->data_size = __cpu_to_le64(
++ misc->device_size - __le64_to_cpu(sb->data_offset));
++ printf("Size is %llu\n", (unsigned long long)
++ __le64_to_cpu(sb->data_size));
++ }
++ if (strcmp(update, "_reshape_progress")==0)
++ sb->reshape_position = __cpu_to_le64(info->reshape_progress);
++
++ sb->sb_csum = calc_sb_1_csum(sb);
++ return rv;
++}
++
++static void locate_bitmap1(struct supertype *st, int fd, void *sbv);
++
++static int store_super1(struct supertype *st, int fd, void *sbv)
++{
++ struct mdp_superblock_1 *sb = sbv;
++ unsigned long long sb_offset;
++ int sbsize;
++ unsigned long long dsize;
++
++ if (!get_dev_size(fd, NULL, &dsize))
++ return 1;
++
++ dsize >>= 9;
++
++ if (dsize < 24)
++ return 2;
++
++ /*
++ * Calculate the position of the superblock.
++ * It is always aligned to a 4K boundary and
++ * depending on minor_version, it can be:
++ * 0: At least 8K, but less than 12K, from end of device
++ * 1: At start of device
++ * 2: 4K from start of device.
++ */
++ switch(st->minor_version) {
++ case 0:
++ sb_offset = dsize;
++ sb_offset -= 8*2;
++ sb_offset &= ~(4*2-1);
++ break;
++ case 1:
++ sb_offset = 0;
++ break;
++ case 2:
++ sb_offset = 4*2;
++ break;
++ default:
++ return -EINVAL;
++ }
++
++
++
++ if (sb_offset != __le64_to_cpu(sb->super_offset) &&
++ 0 != __le64_to_cpu(sb->super_offset)
++ ) {
++ fprintf(stderr, Name ": internal error - sb_offset is wrong\n");
++ abort();
++ }
++
++ if (lseek64(fd, sb_offset << 9, 0)< 0LL)
++ return 3;
++
++ sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev);
++
++ if (write(fd, sb, sbsize) != sbsize)
++ return 4;
++
++ if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
++ struct bitmap_super_s *bm = (struct bitmap_super_s*)
++ (((char*)sb)+1024);
++ if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
++ locate_bitmap1(st, fd, sbv);
++ if (write(fd, bm, sizeof(*bm)) != sizeof(*bm))
++ return 5;
++ }
++ }
++ fsync(fd);
++ return 0;
++}
++
++static int load_super1(struct supertype *st, int fd, void **sbp, char *devname);
++
++static int compare_super1(void **firstp, void *secondv)
++{
++ /*
++ * return:
++ * 0 same, or first was empty, and second was copied
++ * 1 second had wrong number
++ * 2 wrong uuid
++ * 3 wrong other info
++ */
++ struct mdp_superblock_1 *first = *firstp;
++ struct mdp_superblock_1 *second = secondv;
++
++ if (second->magic != __cpu_to_le32(MD_SB_MAGIC))
++ return 1;
++ if (second->major_version != __cpu_to_le32(1))
++ return 1;
++
++ if (!first) {
++ first = malloc(1024+sizeof(bitmap_super_t) +
++ sizeof(struct misc_dev_info));
++ memcpy(first, second, 1024+sizeof(bitmap_super_t) +
++ sizeof(struct misc_dev_info));
++ *firstp = first;
++ return 0;
++ }
++ if (memcmp(first->set_uuid, second->set_uuid, 16)!= 0)
++ return 2;
++
++ if (first->ctime != second->ctime ||
++ first->level != second->level ||
++ first->layout != second->layout ||
++ first->size != second->size ||
++ first->chunksize != second->chunksize ||
++ first->raid_disks != second->raid_disks)
++ return 3;
++ return 0;
++}
++
++static int load_super1(struct supertype *st, int fd, void **sbp, char *devname)
++{
++ unsigned long long dsize;
++ unsigned long long sb_offset;
++ struct mdp_superblock_1 *super;
++ int uuid[4];
++ struct bitmap_super_s *bsb;
++ struct misc_dev_info *misc;
++
++
++ if (st->ss == NULL) {
++ int bestvers = -1;
++ __u64 bestctime = 0;
++ /* guess... choose latest ctime */
++ st->ss = &super1;
++ for (st->minor_version = 0; st->minor_version <= 2 ; st->minor_version++) {
++ switch(load_super1(st, fd, sbp, devname)) {
++ case 0: super = *sbp;
++ if (bestvers == -1 ||
++ bestctime < __le64_to_cpu(super->ctime)) {
++ bestvers = st->minor_version;
++ bestctime = __le64_to_cpu(super->ctime);
++ }
++ free(super);
++ *sbp = NULL;
++ break;
++ case 1: st->ss = NULL; return 1; /*bad device */
++ case 2: break; /* bad, try next */
++ }
++ }
++ if (bestvers != -1) {
++ int rv;
++ st->minor_version = bestvers;
++ st->ss = &super1;
++ st->max_devs = 384;
++ rv = load_super1(st, fd, sbp, devname);
++ if (rv) st->ss = NULL;
++ return rv;
++ }
++ st->ss = NULL;
++ return 2;
++ }
++ if (!get_dev_size(fd, devname, &dsize))
++ return 1;
++ dsize >>= 9;
++
++ if (dsize < 24) {
++ if (devname)
++ fprintf(stderr, Name ": %s is too small for md: size is %llu sectors.\n",
++ devname, dsize);
++ return 1;
++ }
++
++ /*
++ * Calculate the position of the superblock.
++ * It is always aligned to a 4K boundary and
++ * depending on minor_version, it can be:
++ * 0: At least 8K, but less than 12K, from end of device
++ * 1: At start of device
++ * 2: 4K from start of device.
++ */
++ switch(st->minor_version) {
++ case 0:
++ sb_offset = dsize;
++ sb_offset -= 8*2;
++ sb_offset &= ~(4*2-1);
++ break;
++ case 1:
++ sb_offset = 0;
++ break;
++ case 2:
++ sb_offset = 4*2;
++ break;
++ default:
++ return -EINVAL;
++ }
++
++ ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
++
++
++ if (lseek64(fd, sb_offset << 9, 0)< 0LL) {
++ if (devname)
++ fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
++ devname, strerror(errno));
++ return 1;
++ }
++
++ super = malloc(1024 + sizeof(bitmap_super_t) +
++ sizeof(struct misc_dev_info));
++
++ if (read(fd, super, 1024) != 1024) {
++ if (devname)
++ fprintf(stderr, Name ": Cannot read superblock on %s\n",
++ devname);
++ free(super);
++ return 1;
++ }
++
++ if (__le32_to_cpu(super->magic) != MD_SB_MAGIC) {
++ if (devname)
++ fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
++ devname, MD_SB_MAGIC, __le32_to_cpu(super->magic));
++ free(super);
++ return 2;
++ }
++
++ if (__le32_to_cpu(super->major_version) != 1) {
++ if (devname)
++ fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
++ devname, __le32_to_cpu(super->major_version));
++ free(super);
++ return 2;
++ }
++ if (__le64_to_cpu(super->super_offset) != sb_offset) {
++ if (devname)
++ fprintf(stderr, Name ": No superblock found on %s (super_offset is wrong)\n",
++ devname);
++ free(super);
++ return 2;
++ }
++ *sbp = super;
++
++ bsb = (struct bitmap_super_s *)(((char*)super)+1024);
++
++ misc = (struct misc_dev_info*) (bsb+1);
++ misc->device_size = dsize;
++
++ /* Now check on the bitmap superblock */
++ if ((__le32_to_cpu(super->feature_map)&MD_FEATURE_BITMAP_OFFSET) == 0)
++ return 0;
++ /* Read the bitmap superblock and make sure it looks
++ * valid. If it doesn't clear the bit. An --assemble --force
++ * should get that written out.
++ */
++ locate_bitmap1(st, fd, super);
++ if (read(fd, ((char*)super)+1024, sizeof(struct bitmap_super_s))
++ != sizeof(struct bitmap_super_s))
++ goto no_bitmap;
++
++ uuid_from_super1(uuid, super);
++ if (__le32_to_cpu(bsb->magic) != BITMAP_MAGIC ||
++ memcmp(bsb->uuid, uuid, 16) != 0)
++ goto no_bitmap;
++ return 0;
++
++ no_bitmap:
++ super->feature_map = __cpu_to_le32(__le32_to_cpu(super->feature_map) & ~1);
++ return 0;
++}
++
++
++static struct supertype *match_metadata_desc1(char *arg)
++{
++ struct supertype *st = malloc(sizeof(*st));
++ if (!st) return st;
++
++ st->ss = &super1;
++ st->max_devs = 384;
++ if (strcmp(arg, "1") == 0 ||
++ strcmp(arg, "1.0") == 0 ||
++ strcmp(arg, "default/large") == 0) {
++ st->minor_version = 0;
++ return st;
++ }
++ if (strcmp(arg, "1.1") == 0) {
++ st->minor_version = 1;
++ return st;
++ }
++ if (strcmp(arg, "1.2") == 0) {
++ st->minor_version = 2;
++ return st;
++ }
++
++ free(st);
++ return NULL;
++}
++
++static void locate_bitmap1(struct supertype *st, int fd, void *sbv)
++{
++ unsigned long long offset;
++ struct mdp_superblock_1 *sb;
++ int mustfree = 0;
++
++ if (!sbv) {
++ if (st->ss->load_super(st, fd, &sbv, NULL))
++ return; /* no error I hope... */
++ mustfree = 1;
++ }
++ sb = sbv;
++
++ offset = __le64_to_cpu(sb->super_offset);
++ offset += (int32_t) __le32_to_cpu(sb->bitmap_offset);
++ if (mustfree)
++ free(sb);
++ lseek64(fd, offset<<9, 0);
++}
++
++struct superswitch super1 = {
++ .examine_super = NULL,
++ .brief_examine_super = brief_examine_super1,
++ .detail_super = NULL,
++ .brief_detail_super = NULL,
++ .export_super = NULL,
++ .match_home = match_home1,
++ .uuid_from_super = uuid_from_super1,
++ .getinfo_super = getinfo_super1,
++ .update_super = update_super1,
++ .init_super = NULL,
++ .add_to_super = NULL,
++ .store_super = store_super1,
++ .write_init_super = NULL,
++ .compare_super = compare_super1,
++ .load_super = load_super1,
++ .match_metadata_desc = match_metadata_desc1,
++ .avail_size = NULL,
++ .add_internal_bitmap = NULL,
++ .locate_bitmap = locate_bitmap1,
++ .write_bitmap = NULL,
++ .major = 1,
++#if __BYTE_ORDER == BIG_ENDIAN
++ .swapuuid = 0,
++#else
++ .swapuuid = 1,
++#endif
++};
+diff -Nuar --exclude '*.orig' busybox-1.7.4+gentoo/mdadm/util.c busybox-1.7.4+gentoo+mdadm/mdadm/util.c
+--- busybox-1.7.4+gentoo/mdadm/util.c 1969-12-31 16:00:00.000000000 -0800
++++ busybox-1.7.4+gentoo+mdadm/mdadm/util.c 2008-03-11 10:31:00.000000000 -0700
+@@ -0,0 +1,652 @@
++/*
++ * mdadm - manage Linux "md" devices aka RAID arrays.
++ *
++ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License as published by
++ * the Free Software Foundation; either version 2 of the License, or
++ * (at your option) any later version.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Author: Neil Brown
++ * Email: <neilb@cse.unsw.edu.au>
++ * Paper: Neil Brown
++ * School of Computer Science and Engineering
++ * The University of New South Wales
++ * Sydney, 2052
++ * Australia
++ */
++
++#include "mdadm.h"
++#include "md_p.h"
++#include <sys/utsname.h>
++#include <ctype.h>
++
++/*
++ * following taken from linux/blkpg.h because they aren't
++ * anywhere else and it isn't safe to #include linux/ * stuff.
++ */
++
++#define BLKPG _IO(0x12,105)
++
++/* The argument structure */
++struct blkpg_ioctl_arg {
++ int op;
++ int flags;
++ int datalen;
++ void *data;
++};
++
++/* The subfunctions (for the op field) */
++#define BLKPG_ADD_PARTITION 1
++#define BLKPG_DEL_PARTITION 2
++
++/* Sizes of name fields. Unused at present. */
++#define BLKPG_DEVNAMELTH 64
++#define BLKPG_VOLNAMELTH 64
++
++/* The data structure for ADD_PARTITION and DEL_PARTITION */
++struct blkpg_partition {
++ long long start; /* starting offset in bytes */
++ long long length; /* length in bytes */
++ int pno; /* partition number */
++ char devname[BLKPG_DEVNAMELTH]; /* partition name, like sda5 or c0d1p2,
++ to be used in kernel messages */
++ char volname[BLKPG_VOLNAMELTH]; /* volume label */
++};
++
++/*
++ * Parse a 128 bit uuid in 4 integers
++ * format is 32 hexx nibbles with options :.<space> separator
++ * If not exactly 32 hex digits are found, return 0
++ * else return 1
++ */
++int parse_uuid(char *str, int uuid[4])
++{
++ int hit = 0; /* number of Hex digIT */
++ int i;
++ char c;
++ for (i=0; i<4; i++) uuid[i]=0;
++
++ while ((c= *str++)) {
++ int n;
++ if (c>='0' && c<='9')
++ n = c-'0';
++ else if (c>='a' && c <= 'f')
++ n = 10 + c - 'a';
++ else if (c>='A' && c <= 'F')
++ n = 10 + c - 'A';
++ else if (strchr(":. -", c))
++ continue;
++ else return 0;
++
++ if (hit<32) {
++ uuid[hit/8] <<= 4;
++ uuid[hit/8] += n;
++ }
++ hit++;
++ }
++ if (hit == 32)
++ return 1;
++ return 0;
++
++}
++
++
++/*
++ * Get the md version number.
++ * We use the RAID_VERSION ioctl if it is supported
++ * If not, but we have a block device with major '9', we assume
++ * 0.36.0
++ *
++ * Return version number as 24 but number - assume version parts
++ * always < 255
++ */
++
++int md_get_version(int fd)
++{
++ struct stat stb;
++ mdu_version_t vers;
++
++ if (fstat(fd, &stb)<0)
++ return -1;
++ if ((S_IFMT&stb.st_mode) != S_IFBLK)
++ return -1;
++
++ if (ioctl(fd, RAID_VERSION, &vers) == 0)
++ return (vers.major*10000) + (vers.minor*100) + vers.patchlevel;
++ if (errno == EACCES)
++ return -1;
++ if (major(stb.st_rdev) == MD_MAJOR)
++ return (3600);
++ return -1;
++}
++
++
++int get_linux_version()
++{
++ struct utsname name;
++ char *cp;
++ int a,b,c;
++ if (uname(&name) <0)
++ return -1;
++
++ cp = name.release;
++ a = strtoul(cp, &cp, 10);
++ if (*cp != '.') return -1;
++ b = strtoul(cp+1, &cp, 10);
++ if (*cp != '.') return -1;
++ c = strtoul(cp+1, NULL, 10);
++
++ return (a*1000000)+(b*1000)+c;
++}
++
++void remove_partitions(int fd)
++{
++ /* remove partitions from this block devices.
++ * This is used for components added to an array
++ */
++#ifdef BLKPG_DEL_PARTITION
++ struct blkpg_ioctl_arg a;
++ struct blkpg_partition p;
++
++ a.op = BLKPG_DEL_PARTITION;
++ a.data = (void*)&p;
++ a.datalen = sizeof(p);
++ a.flags = 0;
++ memset(a.data, 0, a.datalen);
++ for (p.pno=0; p.pno < 16; p.pno++)
++ ioctl(fd, BLKPG, &a);
++#endif
++}
++
++int enough(int level, int raid_disks, int layout, int clean,
++ char *avail, int avail_disks)
++{
++ int copies, first;
++ switch (level) {
++ case 10:
++ /* This is the tricky one - we need to check
++ * which actual disks are present.
++ */
++ copies = (layout&255)* ((layout>>8) & 255);
++ first=0;
++ do {
++ /* there must be one of the 'copies' form 'first' */
++ int n = copies;
++ int cnt=0;
++ while (n--) {
++ if (avail[first])
++ cnt++;
++ first = (first+1) % raid_disks;
++ }
++ if (cnt == 0)
++ return 0;
++
++ } while (first != 0);
++ return 1;
++
++ case -4:
++ return avail_disks>= 1;
++ case -1:
++ case 0:
++ return avail_disks == raid_disks;
++ case 1:
++ return avail_disks >= 1;
++ case 4:
++ case 5:
++ if (clean)
++ return avail_disks >= raid_disks-1;
++ else
++ return avail_disks >= raid_disks;
++ case 6:
++ if (clean)
++ return avail_disks >= raid_disks-2;
++ else
++ return avail_disks >= raid_disks;
++ default:
++ return 0;
++ }
++}
++
++int same_uuid(int a[4], int b[4], int swapuuid)
++{
++ if (swapuuid) {
++ /* parse uuids are hostendian.
++ * uuid's from some superblocks are big-ending
++ * if there is a difference, we need to swap..
++ */
++ unsigned char *ac = (unsigned char *)a;
++ unsigned char *bc = (unsigned char *)b;
++ int i;
++ for (i=0; i<16; i+= 4) {
++ if (ac[i+0] != bc[i+3] ||
++ ac[i+1] != bc[i+2] ||
++ ac[i+2] != bc[i+1] ||
++ ac[i+3] != bc[i+0])
++ return 0;
++ }
++ return 1;
++ } else {
++ if (a[0]==b[0] &&
++ a[1]==b[1] &&
++ a[2]==b[2] &&
++ a[3]==b[3])
++ return 1;
++ return 0;
++ }
++}
++void copy_uuid(void *a, int b[4], int swapuuid)
++{
++ if (swapuuid) {
++ /* parse uuids are hostendian.
++ * uuid's from some superblocks are big-ending
++ * if there is a difference, we need to swap..
++ */
++ unsigned char *ac = (unsigned char *)a;
++ unsigned char *bc = (unsigned char *)b;
++ int i;
++ for (i=0; i<16; i+= 4) {
++ ac[i+0] = bc[i+3];
++ ac[i+1] = bc[i+2];
++ ac[i+2] = bc[i+1];
++ ac[i+3] = bc[i+0];
++ }
++ } else
++ memcpy(a, b, 16);
++}
++
++char *map_num(mapping_t *map, int num)
++{
++ while (map->name) {
++ if (map->num == num)
++ return map->name;
++ map++;
++ }
++ return NULL;
++}
++
++int map_name(mapping_t *map, char *name)
++{
++ while (map->name) {
++ if (strcmp(map->name, name)==0)
++ return map->num;
++ map++;
++ }
++ return UnSet;
++}
++
++
++int is_standard(char *dev, int *nump)
++{
++ /* tests if dev is a "standard" md dev name.
++ * i.e if the last component is "/dNN" or "/mdNN",
++ * where NN is a string of digits
++ */
++ char *d = strrchr(dev, '/');
++ int type=0;
++ int num;
++ if (!d)
++ return 0;
++ if (strncmp(d, "/d",2)==0)
++ d += 2, type=1; /* /dev/md/dN{pM} */
++ else if (strncmp(d, "/md_d", 5)==0)
++ d += 5, type=1; /* /dev/md_dNpM */
++ else if (strncmp(d, "/md", 3)==0)
++ d += 3, type=-1; /* /dev/mdN */
++ else if (d-dev > 3 && strncmp(d-2, "md/", 3)==0)
++ d += 1, type=-1; /* /dev/md/N */
++ else
++ return 0;
++ if (!*d)
++ return 0;
++ num = atoi(d);
++ while (isdigit(*d))
++ d++;
++ if (*d)
++ return 0;
++ if (nump) *nump = num;
++
++ return type;
++}
++
++
++/*
++ * convert a major/minor pair for a block device into a name in /dev, if possible.
++ * On the first call, walk /dev collecting name.
++ * Put them in a simple linked listfor now.
++ */
++struct devmap {
++ int major, minor;
++ char *name;
++ struct devmap *next;
++} *devlist = NULL;
++int devlist_ready = 0;
++
++int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s)
++{
++ struct stat st;
++ if (S_ISLNK(stb->st_mode)) {
++ stat(name, &st);
++ stb = &st;
++ }
++
++ if ((stb->st_mode&S_IFMT)== S_IFBLK) {
++ char *n = strdup(name);
++ struct devmap *dm = malloc(sizeof(*dm));
++ if (strncmp(n, "/dev/./", 7)==0)
++ strcpy(n+4, name+6);
++ if (dm) {
++ dm->major = major(stb->st_rdev);
++ dm->minor = minor(stb->st_rdev);
++ dm->name = n;
++ dm->next = devlist;
++ devlist = dm;
++ }
++ }
++ return 0;
++}
++
++#ifndef HAVE_NFTW
++#ifdef HAVE_FTW
++int add_dev_1(const char *name, const struct stat *stb, int flag)
++{
++ return add_dev(name, stb, flag, NULL);
++}
++int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags)
++{
++ return ftw(path, add_dev_1, nopenfd);
++}
++#else
++int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags)
++{
++ return 0;
++}
++#endif /* HAVE_FTW */
++#endif /* HAVE_NFTW */
++
++/*
++ * Find a block device with the right major/minor number.
++ * If we find multiple names, choose the shortest.
++ * If we find a non-standard name, it is probably there
++ * deliberately so prefer it over a standard name.
++ * This applies only to names for MD devices.
++ */
++char *map_dev(int major, int minor, int create)
++{
++ struct devmap *p;
++ char *std = NULL, *nonstd=NULL;
++ int did_check = 0;
++
++ if (major == 0 && minor == 0)
++ return NULL;
++
++ retry:
++ if (!devlist_ready) {
++ char *dev = "/dev";
++ struct stat stb;
++ while(devlist) {
++ struct devmap *d = devlist;
++ devlist = d->next;
++ free(d->name);
++ free(d);
++ }
++ if (lstat(dev, &stb)==0 &&
++ S_ISLNK(stb.st_mode))
++ dev = "/dev/.";
++ nftw(dev, add_dev, 10, FTW_PHYS);
++ devlist_ready=1;
++ did_check = 1;
++ }
++
++ for (p=devlist; p; p=p->next)
++ if (p->major == major &&
++ p->minor == minor) {
++ if (is_standard(p->name, NULL)) {
++ if (std == NULL ||
++ strlen(p->name) < strlen(std))
++ std = p->name;
++ } else {
++ if (nonstd == NULL ||
++ strlen(p->name) < strlen(nonstd))
++ nonstd = p->name;
++ }
++ }
++ if (!std && !nonstd && !did_check) {
++ devlist_ready = 0;
++ goto retry;
++ }
++ if (create && !std && !nonstd) {
++ static char buf[30];
++ snprintf(buf, sizeof(buf), "%d:%d", major, minor);
++ nonstd = buf;
++ }
++
++ return nonstd ? nonstd : std;
++}
++
++unsigned long calc_csum(void *super, int bytes)
++{
++ unsigned long long newcsum = 0;
++ int i;
++ unsigned int csum;
++ unsigned int *superc = (unsigned int*) super;
++
++ for(i=0; i<bytes/4; i++)
++ newcsum+= superc[i];
++ csum = (newcsum& 0xffffffff) + (newcsum>>32);
++#ifdef __alpha__
++/* The in-kernel checksum calculation is always 16bit on
++ * the alpha, though it is 32 bit on i386...
++ * I wonder what it is elsewhere... (it uses and API in
++ * a way that it shouldn't).
++ */
++ csum = (csum & 0xffff) + (csum >> 16);
++ csum = (csum & 0xffff) + (csum >> 16);
++#endif
++ return csum;
++}
++
++char *human_size(long long bytes)
++{
++ static char buf[30];
++
++ /* We convert bytes to either centi-M{ega,ibi}bytes or
++ * centi-G{igi,ibi}bytes, with appropriate rounding,
++ * and then print 1/100th of those as a decimal.
++ * We allow upto 2048Megabytes before converting to
++ * gigabytes, as that shows more precision and isn't
++ * too large a number.
++ * Terrabytes are not yet handled.
++ */
++
++ if (bytes < 5000*1024)
++ buf[0]=0;
++ else if (bytes < 2*1024LL*1024LL*1024LL) {
++ long cMiB = (bytes / ( (1LL<<20) / 200LL ) +1) /2;
++ long cMB = (bytes / ( 1000000LL / 200LL ) +1) /2;
++ snprintf(buf, sizeof(buf), " (%ld.%02ld MiB %ld.%02ld MB)",
++ cMiB/100 , cMiB % 100,
++ cMB/100, cMB % 100);
++ } else {
++ long cGiB = (bytes / ( (1LL<<30) / 200LL ) +1) /2;
++ long cGB = (bytes / (1000000000LL/200LL ) +1) /2;
++ snprintf(buf, sizeof(buf), " (%ld.%02ld GiB %ld.%02ld GB)",
++ cGiB/100 , cGiB % 100,
++ cGB/100, cGB % 100);
++ }
++ return buf;
++}
++
++char *human_size_brief(long long bytes)
++{
++ static char buf[30];
++
++
++ if (bytes < 5000*1024)
++ snprintf(buf, sizeof(buf), "%ld.%02ldKiB",
++ (long)(bytes>>10), (long)(((bytes&1023)*100+512)/1024)
++ );
++ else if (bytes < 2*1024LL*1024LL*1024LL)
++ snprintf(buf, sizeof(buf), "%ld.%02ldMiB",
++ (long)(bytes>>20),
++ (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100)
++ );
++ else
++ snprintf(buf, sizeof(buf), "%ld.%02ldGiB",
++ (long)(bytes>>30),
++ (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100)
++ );
++ return buf;
++}
++
++int get_mdp_major(void)
++{
++static int mdp_major = -1;
++ FILE *fl;
++ char *w;
++ int have_block = 0;
++ int have_devices = 0;
++ int last_num = -1;
++
++ if (mdp_major != -1)
++ return mdp_major;
++ fl = fopen("/proc/devices", "r");
++ if (!fl)
++ return -1;
++ while ((w = conf_word(fl, 1))) {
++ if (have_block && strcmp(w, "devices:")==0)
++ have_devices = 1;
++ have_block = (strcmp(w, "Block")==0);
++ if (isdigit(w[0]))
++ last_num = atoi(w);
++ if (have_devices && strcmp(w, "mdp")==0)
++ mdp_major = last_num;
++ free(w);
++ }
++ fclose(fl);
++ return mdp_major;
++}
++
++int dev_open(char *dev, int flags)
++{
++ /* like 'open', but if 'dev' matches %d:%d, create a temp
++ * block device and open that
++ */
++ char *e;
++ int fd = -1;
++ char devname[32];
++ int major;
++ int minor;
++
++ if (!dev) return -1;
++
++ major = strtoul(dev, &e, 0);
++ if (e > dev && *e == ':' && e[1] &&
++ (minor = strtoul(e+1, &e, 0)) >= 0 &&
++ *e == 0) {
++ snprintf(devname, sizeof(devname), "/dev/.tmp.md.%d:%d", major, minor);
++ if (mknod(devname, S_IFBLK|0600, makedev(major, minor))==0) {
++ fd = open(devname, flags);
++ unlink(devname);
++ }
++ } else
++ fd = open(dev, flags);
++ return fd;
++}
++
++struct superswitch *superlist[] = { &super0, &super1, NULL };
++
++struct supertype *super_by_version(int vers, int minor)
++{
++ struct supertype *st = malloc(sizeof(*st));
++ if (!st) return st;
++ if (vers == 0) {
++ st->ss = &super0;
++ st->max_devs = MD_SB_DISKS;
++ }
++
++ if (vers == 1) {
++ st->ss = &super1;
++ st->max_devs = 384;
++ }
++ st->minor_version = minor;
++ return st;
++}
++
++struct supertype *guess_super(int fd)
++{
++ /* try each load_super to find the best match,
++ * and return the best superswitch
++ */
++ struct superswitch *ss;
++ struct supertype *st;
++ unsigned long besttime = 0;
++ int bestsuper = -1;
++
++ void *sbp = NULL;
++ int i;
++
++ st = malloc(sizeof(*st));
++ memset(st, 0, sizeof(*st));
++ for (i=0 ; superlist[i]; i++) {
++ int rv;
++ ss = superlist[i];
++ st->ss = NULL;
++ rv = ss->load_super(st, fd, &sbp, NULL);
++ if (rv == 0) {
++ struct mdinfo info;
++ ss->getinfo_super(&info, sbp);
++ if (bestsuper == -1 ||
++ besttime < info.array.ctime) {
++ bestsuper = i;
++ besttime = info.array.ctime;
++ }
++ free(sbp);
++ }
++ }
++ if (bestsuper != -1) {
++ int rv;
++ st->ss = NULL;
++ rv = superlist[bestsuper]->load_super(st, fd, &sbp, NULL);
++ if (rv == 0) {
++ free(sbp);
++ return st;
++ }
++ }
++ free(st);
++ return NULL;
++}
++
++/* Return size of device in bytes */
++int get_dev_size(int fd, char *dname, unsigned long long *sizep)
++{
++ unsigned long long ldsize;
++#ifdef BLKGETSIZE64
++ if (ioctl(fd, BLKGETSIZE64, &ldsize) != 0)
++#endif
++ {
++ unsigned long dsize;
++ if (ioctl(fd, BLKGETSIZE, &dsize) == 0) {
++ ldsize = dsize;
++ ldsize <<= 9;
++ } else {
++ if (dname)
++ fprintf(stderr, Name ": Cannot get size of %s: %s\b",
++ dname, strerror(errno));
++ return 0;
++ }
++ }
++ *sizep = ldsize;
++ return 1;
++}
projects / genkernel.git / commitdiff