/*
- * 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>
+#include <ctype.h>
/*
* Parse a 128 bit uuid in 4 integers
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)
return -1;
if (ioctl(fd, RAID_VERSION, &vers) == 0)
- return (vers.major<<16) | (vers.minor<<8) | vers.patchlevel;
-
+ return (vers.major*10000) + (vers.minor*100) + vers.patchlevel;
+ if (errno == EACCES)
+ return -1;
if (MAJOR(stb.st_rdev) == MD_MAJOR)
- return (36<<8);
+ return (3600);
return -1;
}
int get_linux_version()
{
struct utsname name;
+ char *cp;
int a,b,c;
if (uname(&name) <0)
return -1;
- if (sscanf(name.release, "%d.%d.%d", &a,&b,&c)!= 3)
- return -1;
- return (a<<16)+(b<<8)+c;
+ 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;
}
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;
case 4:
case 5:
return avail_disks >= raid_disks-1;
+ case 6:
+ return avail_disks >= raid_disks-2;
default:
return 0;
}
* 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;
offset *= 512;
+ ioctl(fd, BLKFLSBUF, 0); /* make sure we read current data */
+
if (lseek64(fd, offset, 0)< 0LL)
return 3;
- if (read(fd, &super, sizeof(super)) != sizeof(super))
+ if (read(fd, super, sizeof(*super)) != sizeof(*super))
return 4;
if (super->md_magic != MD_SB_MAGIC)
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)
+{
+ /*
+ * Check for an ext2fs file system.
+ * Superblock is always 1K at 1K offset
+ *
+ * s_magic is le16 at 56 == 0xEF53
+ * report mtime - le32 at 44
+ * blocks - le32 at 4
+ * logblksize - le32 at 24
+ */
+ unsigned char sb[1024];
+ time_t mtime;
+ int size, bsize;
+ if (lseek(fd, 1024,0)!= 1024)
+ return 0;
+ if (read(fd, sb, 1024)!= 1024)
+ return 0;
+ if (sb[56] != 0x53 || sb[57] != 0xef)
+ return 0;
+
+ mtime = sb[44]|(sb[45]|(sb[46]|sb[47]<<8)<<8)<<8;
+ bsize = sb[24]|(sb[25]|(sb[26]|sb[27]<<8)<<8)<<8;
+ size = sb[4]|(sb[5]|(sb[6]|sb[7]<<8)<<8)<<8;
+ fprintf(stderr, Name ": %s appears to contain an ext2fs file system\n",
+ name);
+ fprintf(stderr," size=%dK mtime=%s",
+ size*(1<<bsize), ctime(&mtime));
+ return 1;
+}
+
+int check_reiser(int fd, char *name)
+{
+ /*
+ * superblock is at 64K
+ * size is 1024;
+ * Magic string "ReIsErFs" or "ReIsEr2Fs" at 52
+ *
+ */
+ unsigned char sb[1024];
+ int size;
+ if (lseek(fd, 64*1024, 0) != 64*1024)
+ return 0;
+ if (read(fd, sb, 1024) != 1024)
+ return 0;
+ if (strncmp(sb+52, "ReIsErFs",8)!=0 &&
+ strncmp(sb+52, "ReIsEr2Fs",9)!=0)
+ return 0;
+ fprintf(stderr, Name ": %s appears to contain a reiserfs file system\n",name);
+ size = sb[0]|(sb[1]|(sb[2]|sb[3]<<8)<<8)<<8;
+ fprintf(stderr, " size = %dK\n", size*4);
+
+ return 1;
+}
+
+int check_raid(int fd, char *name)
+{
+ mdp_super_t super;
+ time_t crtime;
+ if (load_super(fd, &super))
+ return 0;
+ /* Looks like a raid array .. */
+ fprintf(stderr, Name ": %s appears to be part of a raid array:\n",
+ name);
+ crtime = super.ctime;
+ fprintf(stderr, " level=%d devices=%d ctime=%s",
+ super.level, super.raid_disks, ctime(&crtime));
+ return 1;
+}
+
+
+int ask(char *mesg)
+{
+ char *add = "";
+ int i;
+ for (i=0; i<5; i++) {
+ char buf[100];
+ fprintf(stderr, "%s%s", mesg, add);
+ fflush(stderr);
+ if (fgets(buf, 100, stdin)==NULL)
+ return 0;
+ if (buf[0]=='y' || buf[0]=='Y')
+ return 1;
+ if (buf[0]=='n' || buf[0]=='N')
+ return 0;
+ add = "(y/n) ";
+ }
+ fprintf(stderr, Name ": assuming 'no'\n");
+ return 0;
+}
+
+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;
+}
+
+/*
+ * 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;
+
+#ifdef UCLIBC
+char *map_dev(int major, int minor)
+{
+#if 0
+ fprintf(stderr, "Warning - fail to map %d,%d to a device name\n",
+ major, minor);
+#endif
+ return NULL;
+}
+#else
+#define __USE_XOPEN_EXTENDED
+#include <ftw.h>
+
+
+#ifndef __dietlibc__
+int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s)
+#else
+int add_dev(const char *name, const struct stat *stb, int flag)
+#endif
+{
+ 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;
+}
+
+int is_standard(char *dev)
+{
+ /* 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
+ */
+ dev = strrchr(dev, '/');
+ if (!dev)
+ return 0;
+ if (strncmp(dev, "/d",2)==0)
+ dev += 2;
+ else if (strncmp(dev, "/md", 3)==0)
+ dev += 3;
+ else
+ return 0;
+ if (!*dev)
+ return 0;
+ while (isdigit(*dev))
+ dev++;
+ if (*dev)
+ return 0;
+ return 1;
+}
+
+
+/*
+ * Find a block device with the right major/minor number.
+ * Avoid /dev/mdNN and /dev/md/dNN is possible
+ */
+char *map_dev(int major, int minor)
+{
+ struct devmap *p;
+ char *std = NULL;
+ if (!devlist_ready) {
+#ifndef __dietlibc__
+ nftw("/dev", add_dev, 10, FTW_PHYS);
+#else
+ ftw("/dev", add_dev, 10);
+#endif
+ devlist_ready=1;
+ }
+
+ for (p=devlist; p; p=p->next)
+ if (p->major == major &&
+ p->minor == minor) {
+ if (is_standard(p->name))
+ std = p->name;
+ else
+ return p->name;
+ }
+ return std;
+}
+
+#endif
+
+unsigned long 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)+5000)/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;
+}
+
+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;
+}
+
+
+
+char *get_md_name(int dev)
+{
+ /* find /dev/md%d or /dev/md/%d or make a device /dev/.tmp.md%d */
+ /* if dev < 0, want /dev/md/d%d or find mdp in /proc/devices ... */
+ static char devname[50];
+ struct stat stb;
+ dev_t rdev;
+ char *dn;
+
+ if (dev < 0) {
+ int mdp = get_mdp_major();
+ if (mdp < 0) return NULL;
+ rdev = MKDEV(mdp, (-1-dev)<<6);
+ sprintf(devname, "/dev/md/d%d", -1-dev);
+ if (stat(devname, &stb) == 0
+ && (S_IFMT&stb.st_mode) == S_IFBLK
+ && (stb.st_rdev == rdev))
+ return devname;
+ } else {
+ 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;
+ }
+ dn = map_dev(MAJOR(rdev), MINOR(rdev));
+ if (dn)
+ return dn;
+ sprintf(devname, "/dev/.tmp.md%d", dev);
+ if (mknod(devname, S_IFBLK | 0600, rdev) == -1)
+ if (errno != EEXIST)
+ 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