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authorNeil Brown <neilb@suse.de>2001-07-26 07:00:09 +0000
committerNeil Brown <neilb@suse.de>2001-07-26 07:00:09 +0000
commit82b27616de634964db1a71bd5d9813db71e391a1 (patch)
tree310a2ed60dbb0903c73ba261914da269e9ec9072 /util.c
parent682c705194a869b882cd710d5f996142912db390 (diff)
downloadmdadm-82b27616de634964db1a71bd5d9813db71e391a1.tar.gz
mdadm-82b27616de634964db1a71bd5d9813db71e391a1.tar.xz
mdadm-82b27616de634964db1a71bd5d9813db71e391a1.zip
mdctl-v0.4mdctl-v0.4
Diffstat (limited to 'util.c')
-rw-r--r--util.c95
1 files changed, 93 insertions, 2 deletions
diff --git a/util.c b/util.c
index bb370dd..ea30b31 100644
--- a/util.c
+++ b/util.c
@@ -56,8 +56,10 @@ int parse_uuid(char *str, int uuid[4])
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)
@@ -222,6 +224,31 @@ int load_super(int fd, mdp_super_t *super)
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)
{
@@ -333,3 +360,67 @@ int map_name(mapping_t *map, char *name)
}
return -10;
}
+
+/*
+ * 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;
+
+#define __USE_XOPEN_EXTENDED
+#include <ftw.h>
+
+
+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;
+ }
+ }
+ return 0;
+}
+
+char *map_dev(int major, int minor)
+{
+ struct devmap *p;
+ if (!devlist_ready) {
+ nftw("/dev", add_dev, 10, FTW_PHYS);
+ devlist_ready=1;
+ }
+
+ for (p=devlist; p; p=p->next)
+ if (p->major == major &&
+ p->minor == minor)
+ return p->name;
+ return NULL;
+}
+
+
+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 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;
+}