/*
- * 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
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;
- if (sscanf(name.release, "%d.%d.%d", &a,&b,&c)!= 3)
- 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;
}
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 (load_super(fd, &super))
return 0;
/* Looks like a raid array .. */
- fprintf(stderr, Name ": %s appear to be part of a raid array:\n",
+ fprintf(stderr, Name ": %s appears 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 map->num;
map++;
}
- return -10;
+ return UnSet;
}
/*
} *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);
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;
- if (!devlist_ready) {
- nftw("/dev", add_dev, 10, FTW_PHYS);
- devlist_ready=1;
- }
+ 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)
- return p->name;
- return NULL;
+ 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
-int calc_sb_csum(mdp_super_t *super)
+unsigned long calc_sb_csum(mdp_super_t *super)
{
unsigned int oldcsum = super->sb_csum;
- unsigned long long newcsum = 0; /* FIXME why does this make it work?? */
+ unsigned long long newcsum = 0;
unsigned long csum;
int i;
unsigned int *superc = (int*) super;
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