X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fmdadm.git;a=blobdiff_plain;f=util.c;h=1736d70791c8ce5d145f6c01516384f4c19adb30;hp=ab2d7e9f06e3cb1f91a4a9c30529df872ee95670;hb=9008ed1c9623b7c11775ea8a7be17eb1bde5fd09;hpb=2eb91c81d8da5cfdc36c93d8daf405c95e8bac2f

diff --git a/util.c b/util.c
index ab2d7e9f..1736d707 100644
--- a/util.c
+++ b/util.c
@@ -828,6 +828,20 @@ int open_dev_excl(int devnum)
 	return -1;
 }
 
+int same_dev(char *one, char *two)
+{
+	struct stat st1, st2;
+	if (stat(one, &st1) != 0)
+		return 0;
+	if (stat(two, &st2) != 0)
+		return 0;
+	if ((st1.st_mode & S_IFMT) != S_IFBLK)
+		return 0;
+	if ((st2.st_mode & S_IFMT) != S_IFBLK)
+		return 0;
+	return st1.st_rdev == st2.st_rdev;
+}
+
 struct superswitch *superlist[] = { &super0, &super1, &super_ddf, &super_imsm, NULL };
 
 #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO)
@@ -1116,13 +1130,34 @@ int devname2devnum(char *name)
 
 int stat2devnum(struct stat *st)
 {
+	char path[30];
+	char link[200];
+	char *cp;
+	int n;
+
 	if ((S_IFMT & st->st_mode) == S_IFBLK) {
 		if (major(st->st_rdev) == MD_MAJOR)
 			return minor(st->st_rdev);
-		else
-			return -1- (minor(st->st_rdev)>>6);
+		else if (major(st->st_rdev) == get_mdp_major())
+			return -1- (minor(st->st_rdev)>>MdpMinorShift);
+
+		/* must be an extended-minor partition. Look at the
+		 * /sys/dev/block/%d:%d link which must look like
+		 * ../../block/mdXXX/mdXXXpYY
+		 */
+		sprintf(path, "/sys/dev/block/%d:%d", major(st->st_rdev),
+			minor(st->st_rdev));
+		n = readlink(path, link, sizeof(link)-1);
+		if (n <= 0)
+			return NoMdDev;
+		link[n] = 0;
+		cp = strrchr(link, '/');
+		if (cp) *cp = 0;
+		cp = strchr(link, '/');
+		if (cp && strncmp(cp, "/md", 3) == 0)
+			return devname2devnum(cp+1);
 	}
-	return -1;
+	return NoMdDev;
 
 }
 
@@ -1131,7 +1166,7 @@ int fd2devnum(int fd)
 	struct stat stb;
 	if (fstat(fd, &stb) == 0)
 		return stat2devnum(&stb);
-	return -1;
+	return NoMdDev;
 }
 
 int mdmon_running(int devnum)
@@ -1188,7 +1223,7 @@ int start_mdmon(int devnum)
 		NULL
 	};
 
-	if (env_no_mdmon())
+	if (check_env("MDADM_NO_MDMON"))
 		return 0;
 
 	len = readlink("/proc/self/exe", pathbuf, sizeof(pathbuf));
@@ -1227,9 +1262,9 @@ int start_mdmon(int devnum)
 	return 0;
 }
 
-int env_no_mdmon(void)
+int check_env(char *name)
 {
-	char *val = getenv("MDADM_NO_MDMON");
+	char *val = getenv(name);
 
 	if (val && atoi(val) == 1)
 		return 1;
@@ -1278,15 +1313,6 @@ void append_metadata_update(struct supertype *st, void *buf, int len)
 	*st->update_tail = mu;
 	st->update_tail = &mu->next;
 }
-
-struct superswitch *find_metadata_methods(char *vers)
-{
-	if (strcmp(vers, "ddf") == 0)
-		return &super_ddf;
-	if (strcmp(vers, "imsm") == 0)
-		return &super_imsm;
-	return NULL;
-}
 #endif /* MDASSEMBLE */
 
 #ifdef __TINYC__