+ return UnSet;
+}
+
+
+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;
+}
+
+
+/*
+ * 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;
+}
+
+/*
+ * 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);