/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
+ * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
* 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
+ * Email: <neilb@suse.de>
*/
#include "mdadm.h"
return __cpu_to_le32(csum);
}
+static char abuf[4096+4096];
+static int aread(int fd, void *buf, int len)
+{
+ /* aligned read.
+ * On devices with a 4K sector size, we need to read
+ * the full sector and copy relevant bits into
+ * the buffer
+ */
+ int bsize;
+ char *b;
+ int n;
+ if (ioctl(fd, BLKSSZGET, &bsize) != 0 ||
+ bsize <= len)
+ return read(fd, buf, len);
+ if (bsize > 4096)
+ return -1;
+ b = (char*)(((long)(abuf+4096))&~4095UL);
+
+ n = read(fd, b, bsize);
+ if (n <= 0)
+ return n;
+ lseek(fd, len - n, 1);
+ if (n > len)
+ n = len;
+ memcpy(buf, b, n);
+ return n;
+}
+
+static int awrite(int fd, void *buf, int len)
+{
+ /* aligned write.
+ * On devices with a 4K sector size, we need to write
+ * the full sector. We pre-read if the sector is larger
+ * than the write.
+ * The address must be sector-aligned.
+ */
+ int bsize;
+ char *b;
+ int n;
+ if (ioctl(fd, BLKSSZGET, &bsize) != 0 ||
+ bsize <= len)
+ return write(fd, buf, len);
+ if (bsize > 4096)
+ return -1;
+ b = (char*)(((long)(abuf+4096))&~4095UL);
+
+ n = read(fd, b, bsize);
+ if (n <= 0)
+ return n;
+ lseek(fd, -n, 1);
+ memcpy(b, buf, len);
+ n = write(fd, b, bsize);
+ if (n <= 0)
+ return n;
+ lseek(fd, len - n, 1);
+ return len;
+}
+
#ifndef MDASSEMBLE
static void examine_super1(struct supertype *st, char *homehost)
{
struct mdp_superblock_1 *sb = st->sb;
time_t atime;
int d;
- int faulty;
+ int role;
int i;
char *c;
int l = homehost ? strlen(homehost) : 0;
default: break;
}
printf("\n");
+#if 0
+ /* This turns out to just be confusing */
printf(" Array Slot : %d (", __le32_to_cpu(sb->dev_number));
for (i= __le32_to_cpu(sb->max_dev); i> 0 ; i--)
if (__le16_to_cpu(sb->dev_roles[i-1]) != 0xffff)
else printf("%d", role);
}
printf(")\n");
+#endif
+ printf(" Device Role : ");
+ d = __le32_to_cpu(sb->dev_number);
+ if (d < sb->raid_disks)
+ role = __le16_to_cpu(sb->dev_roles[d]);
+ else
+ role = 0xFFFF;
+ if (role >= 0xFFFE)
+ printf("spare\n");
+ else
+ printf("Active device %d\n", role);
+
printf(" Array State : ");
for (d=0; d<__le32_to_cpu(sb->raid_disks); d++) {
int cnt = 0;
}
}
if (cnt > 1) printf("?");
- else if (cnt == 1 && me) printf("U");
- else if (cnt == 1) printf("u");
- else printf ("_");
+ else if (cnt == 1) printf("A");
+ else printf (".");
}
+#if 0
+ /* This is confusing too */
faulty = 0;
for (i=0; i< __le32_to_cpu(sb->max_dev); i++) {
int role = __le16_to_cpu(sb->dev_roles[i]);
faulty++;
}
if (faulty) printf(" %d failed", faulty);
+#endif
+ printf(" ('A' == active, '.' == missing)");
printf("\n");
}
-static void brief_examine_super1(struct supertype *st)
+static void brief_examine_super1(struct supertype *st, int verbose)
{
struct mdp_superblock_1 *sb = st->sb;
int i;
else
nm = NULL;
- printf("ARRAY%s%s level=%s ",
- nm ? " /dev/md/":"", nm,
- c?c:"-unknown-");
+ printf("ARRAY%s%s", nm ? " /dev/md/":"", nm);
+ if (verbose && c)
+ printf(" level=%s", c);
sb_offset = __le64_to_cpu(sb->super_offset);
if (sb_offset <= 4)
- printf("metadata=1.1 ");
+ printf(" metadata=1.1 ");
else if (sb_offset <= 8)
- printf("metadata=1.2 ");
+ printf(" metadata=1.2 ");
else
- printf("metadata=1.0 ");
- printf("num-devices=%d UUID=", __le32_to_cpu(sb->raid_disks));
+ printf(" metadata=1.0 ");
+ if (verbose)
+ printf("num-devices=%d ", __le32_to_cpu(sb->raid_disks));
+ printf("UUID=");
for (i=0; i<16; i++) {
if ((i&3)==0 && i != 0) printf(":");
printf("%02x", sb->set_uuid[i]);
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();
+ __u32 r[4] = {random(), random(), random(), random()};
+ memcpy(sb->device_uuid, r, 16);
}
sb->dev_roles[i] =
else {
if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
read(rfd, sb->set_uuid, 16) != 16) {
- *(__u32*)(sb->set_uuid) = random();
- *(__u32*)(sb->set_uuid+4) = random();
- *(__u32*)(sb->set_uuid+8) = random();
- *(__u32*)(sb->set_uuid+12) = random();
+ __u32 r[4] = {random(), random(), random(), random()};
+ memcpy(sb->set_uuid, r, 16);
}
if (rfd >= 0) close(rfd);
}
else
*rp = 0xfffe;
+ if (dk->number >= __le32_to_cpu(sb->max_dev) &&
+ __le32_to_cpu(sb->max_dev) < 384)
+ sb->max_dev = __cpu_to_le32(dk->number+1);
+
sb->dev_number = __cpu_to_le32(dk->number);
sb->sb_csum = calc_sb_1_csum(sb);
sbsize = sizeof(*sb) + 2 * __le32_to_cpu(sb->max_dev);
sbsize = (sbsize+511)&(~511UL);
- if (write(fd, sb, sbsize) != sbsize)
+ if (awrite(fd, sb, sbsize) != sbsize)
return 4;
if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) {
(((char*)sb)+1024);
if (__le32_to_cpu(bm->magic) == BITMAP_MAGIC) {
locate_bitmap1(st, fd);
- if (write(fd, bm, ROUND_UP(sizeof(*bm),512)) !=
- ROUND_UP(sizeof(*bm),512))
+ if (awrite(fd, bm, sizeof(*bm)) !=
+ sizeof(*bm))
return 5;
}
}
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();
+ __u32 r[4] = {random(), random(), random(), random()};
+ memcpy(sb->device_uuid, r, 16);
}
- if (rfd >= 0) close(rfd);
+ if (rfd >= 0)
+ close(rfd);
+
sb->events = 0;
refst =*st;
return 1;
}
- if (read(fd, super, 1024) != 1024) {
+ if (aread(fd, super, 1024) != 1024) {
if (devname)
fprintf(stderr, Name ": Cannot read superblock on %s\n",
devname);
* should get that written out.
*/
locate_bitmap1(st, fd);
- if (read(fd, ((char*)super)+1024, 512)
+ if (aread(fd, ((char*)super)+1024, 512)
!= 512)
goto no_bitmap;
int rv = 0;
int towrite, n;
- char abuf[4096+512];
- char *buf = (char*)(((long)(abuf+512))&~511UL);
+ char *buf = (char*)(((long)(abuf+4096))&~4095UL);
locate_bitmap1(st, fd);
#else
.swapuuid = 1,
#endif
- .name = "1.0",
+ .name = "1.x",
};
projects / thirdparty / mdadm.git / blobdiff