mdadm-1.0.1

[thirdparty/mdadm.git] / util.c

diff --git a/util.c b/util.c
index ea30b3109096a3501ad41aa8e5ef9d8556ab49ea..f2d16be149ff23750cd9204b98b6d69ec777c790 100644 (file)
--- a/util.c
+++ b/util.c
@@ -1,7 +1,7 @@
 /*
- * 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
@@ -27,7 +27,7 @@
  *           Australia
  */
 
-#include       "mdctl.h"
+#include       "mdadm.h"
 #include       "md_p.h"
 #include       <sys/utsname.h>
 
@@ -113,6 +113,8 @@ int get_linux_version()
 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;
@@ -197,8 +199,8 @@ int load_super(int fd, mdp_super_t *super)
         *   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;
@@ -315,7 +317,7 @@ int check_raid(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;
 }
@@ -412,7 +414,7 @@ char *map_dev(int major, int minor)
 int 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;
@@ -424,3 +426,88 @@ int calc_sb_csum(mdp_super_t *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)+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);
+}