/*
- * mdctl - manage Linux "md" devices aka RAID arrays.
+ * mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
*
*
* This program is free software; you can redistribute it and/or modify
* Australia
*/
-#include "mdctl.h"
+#include "mdadm.h"
#include "md_p.h"
#include <sys/utsname.h>
continue;
else return 0;
- uuid[hit/4] <<= 4;
- uuid[hit/4] += n;
+ if (hit<32) {
+ uuid[hit/8] <<= 4;
+ uuid[hit/8] += n;
+ }
hit++;
}
if (hit == 32)
int enough(int level, int raid_disks, int avail_disks)
{
switch (level) {
+ case -4:
+ return avail_disks>= 1;
case -1:
case 0:
return avail_disks == raid_disks;
* 5 - no magic
* 6 - wrong major version
*/
- long size;
- long long offset;
+ unsigned long size;
+ unsigned long long offset;
if (ioctl(fd, BLKGETSIZE, &size))
return 1;
return 0;
}
+int store_super(int fd, mdp_super_t *super)
+{
+ long size;
+ long long offset;
+
+ if (ioctl(fd, BLKGETSIZE, &size))
+ return 1;
+
+ if (size < MD_RESERVED_SECTORS*2)
+ return 2;
+
+ offset = MD_NEW_SIZE_SECTORS(size);
+
+ offset *= 512;
+
+ if (lseek64(fd, offset, 0)< 0LL)
+ return 3;
+
+ if (write(fd, super, sizeof(*super)) != sizeof(*super))
+ return 4;
+
+ return 0;
+}
+
+
int check_ext2(int fd, char *name)
{
fprintf(stderr, Name ": %s appear to be part of a raid array:\n",
name);
crtime = super.ctime;
- fprintf(stderr, " level=%d disks=%d ctime=%s",
+ fprintf(stderr, " level=%d devices=%d ctime=%s",
super.level, super.raid_disks, ctime(&crtime));
return 1;
}
}
return -10;
}
+
+/*
+ * 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;
+
+#define __USE_XOPEN_EXTENDED
+#include <ftw.h>
+
+
+int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s)
+{
+ if ((stb->st_mode&S_IFMT)== S_IFBLK) {
+ char *n = strdup(name);
+ struct devmap *dm = malloc(sizeof(*dm));
+ if (dm) {
+ dm->major = MAJOR(stb->st_rdev);
+ dm->minor = MINOR(stb->st_rdev);
+ dm->name = n;
+ dm->next = devlist;
+ devlist = dm;
+ }
+ }
+ return 0;
+}
+
+char *map_dev(int major, int minor)
+{
+ struct devmap *p;
+ if (!devlist_ready) {
+ nftw("/dev", add_dev, 10, FTW_PHYS);
+ devlist_ready=1;
+ }
+
+ for (p=devlist; p; p=p->next)
+ if (p->major == major &&
+ p->minor == minor)
+ return p->name;
+ return NULL;
+}
+
+
+int calc_sb_csum(mdp_super_t *super)
+{
+ unsigned int oldcsum = super->sb_csum;
+ unsigned long long newcsum = 0;
+ unsigned long csum;
+ int i;
+ unsigned int *superc = (int*) super;
+ super->sb_csum = 0;
+
+ for(i=0; i<MD_SB_BYTES/4; i++)
+ newcsum+= superc[i];
+ csum = (newcsum& 0xffffffff) + (newcsum>>32);
+ super->sb_csum = oldcsum;
+ return csum;
+}
+
+char *human_size(long long bytes)
+{
+ static char buf[30];
+
+
+ if (bytes < 5000*1024)
+ buf[0]=0;
+ else if (bytes < 2*1024LL*1024LL*1024LL)
+ sprintf(buf, " (%ld.%02ld MiB %ld.%02ld MB)",
+ (long)(bytes>>20),
+ (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100),
+ (long)(bytes/1000/1000),
+ (long)(((bytes%1000000)+5000)/10000)
+ );
+ else
+ sprintf(buf, " (%ld.%02ld GiB %ld.%02ld GB)",
+ (long)(bytes>>30),
+ (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100),
+ (long)(bytes/1000LL/1000LL/1000LL),
+ (long)((((bytes/1000)%1000000)+50000)/10000)
+ );
+ return buf;
+}
+
+char *human_size_brief(long long bytes)
+{
+ static char buf[30];
+
+
+ if (bytes < 5000*1024)
+ sprintf(buf, "%ld.%02ldKiB",
+ (long)(bytes>>10), (long)(((bytes&1023)*100+512)/1024)
+ );
+ else if (bytes < 2*1024LL*1024LL*1024LL)
+ sprintf(buf, "%ld.%02ldMiB",
+ (long)(bytes>>20),
+ (long)((bytes&0xfffff)+0x100000/200)/(0x100000/100)
+ );
+ else
+ sprintf(buf, "%ld.%02ldGiB",
+ (long)(bytes>>30),
+ (long)(((bytes>>10)&0xfffff)+0x100000/200)/(0x100000/100)
+ );
+ return buf;
+}
+
+
+#define MD_MAJOR 9
+char *get_md_name(int dev)
+{
+ /* find /dev/md%d or /dev/md/%d or make a device /dev/.tmp.md%d */
+ static char devname[50];
+ struct stat stb;
+ dev_t rdev = MKDEV(MD_MAJOR, dev);
+
+ sprintf(devname, "/dev/md%d", dev);
+ if (stat(devname, &stb) == 0
+ && (S_IFMT&stb.st_mode) == S_IFBLK
+ && (stb.st_rdev == rdev))
+ return devname;
+
+ sprintf(devname, "/dev/md/%d", dev);
+ if (stat(devname, &stb) == 0
+ && (S_IFMT&stb.st_mode) == S_IFBLK
+ && (stb.st_rdev == rdev))
+ return devname;
+
+ sprintf(devname, "/dev/.tmp.md%d", dev);
+ if (mknod(devname, S_IFBLK | 0600, rdev) == -1)
+ return NULL;
+
+ if (stat(devname, &stb) == 0
+ && (S_IFMT&stb.st_mode) == S_IFBLK
+ && (stb.st_rdev == rdev))
+ return devname;
+ unlink(devname);
+ return NULL;
+}
+
+void put_md_name(char *name)
+{
+ if (strncmp(name, "/dev/.tmp.md", 12)==0)
+ unlink(name);
+}
projects / thirdparty / mdadm.git / blobdiff