/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
- * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
+ * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
*
*
* This program is free software; you can redistribute it and/or modify
return (a*1000000)+(b*1000)+c;
}
-int enough(int level, int raid_disks, int avail_disks)
+int enough(int level, int raid_disks, int layout,
+ char *avail, int avail_disks)
{
+ int copies, first;
switch (level) {
- case 10: return 1; /* a lie, but it is hard to tell */
+ case 10:
+ /* This is the tricky one - we need to check
+ * which actual disks are present.
+ */
+ copies = (layout&255)* (layout>>8);
+ 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;
*
*/
unsigned char sb[1024];
- int size;
+ unsigned long size;
if (lseek(fd, 64*1024, 0) != 64*1024)
return 0;
if (read(fd, sb, 1024) != 1024)
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);
+ fprintf(stderr, " size = %luK\n", size*4);
return 1;
}
void *super;
struct mdinfo info;
time_t crtime;
+ char *level;
struct supertype *st = guess_super(fd);
if (!st) return 0;
st->ss->getinfo_super(&info, super);
free(super);
crtime = info.array.ctime;
- fprintf(stderr, " level=%d devices=%d ctime=%s",
- info.array.level, info.array.raid_disks, ctime(&crtime));
+ level = map_num(pers, info.array.level);
+ if (!level) level = "-unknown-";
+ fprintf(stderr, " level=%s devices=%d ctime=%s",
+ level, info.array.raid_disks, ctime(&crtime));
return 1;
}
#ifdef UCLIBC
int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s)
{
+ return 0;
}
-char *map_dev(int major, int minor)
+char *map_dev(int major, int minor, int create)
{
#if 0
fprintf(stderr, "Warning - fail to map %d,%d to a device name\n",
}
int nftw(const char *path, int (*han)(const char *name, const struct stat *stb, int flag, struct FTW *s), int nopenfd, int flags)
{
- ftw(path, add_dev_1, nopenfd);
+ return ftw(path, add_dev_1, nopenfd);
}
#endif
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;
+ struct stat st;
+ if (S_ISLNK(stb->st_mode)) {
+ stat(name, &st);
+ stb = &st;
}
- }
- return 0;
+
+ 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;
}
/*
* deliberately so prefer it over a standard name.
* This applies only to names for MD devices.
*/
-char *map_dev(int major, int minor)
+char *map_dev(int major, int minor, int create)
{
struct devmap *p;
char *std = NULL, *nonstd=NULL;
+ int did_check = 0;
+ retry:
if (!devlist_ready) {
- nftw("/dev", add_dev, 10, FTW_PHYS);
+ char *dev = "/dev";
+ struct stat stb;
+ 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)
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;
}
&& (stb.st_rdev == rdev))
return devname;
}
- dn = map_dev(major(rdev), minor(rdev));
+ dn = map_dev(major(rdev), minor(rdev), 0);
if (dn)
return dn;
snprintf(devname, sizeof(devname), "/dev/.tmp.md%d", dev);
unlink(name);
}
-
+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 = strtoul(dev, &e, 0);
+ int minor;
+ 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 };
return NULL;
}
+
#ifdef __TINYC__
/* tinyc doesn't optimize this check in ioctl.h out ... */
unsigned int __invalid_size_argument_for_IOC = 0;
projects / thirdparty / mdadm.git / blobdiff