X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fmdadm.git;a=blobdiff_plain;f=util.c;h=e613a0c8e9fc442d61252184dcab8760de46e046;hp=f6e4dd0eb19fed3a9c2875d7a1531cddae77c85d;hb=da1887895404506708387fa3781bf0df0a2664ff;hpb=36ba7d4849186b4c97bd6d5f905a390ff1de6f83

diff --git a/util.c b/util.c
index f6e4dd0e..e613a0c8 100644
--- a/util.c
+++ b/util.c
@@ -432,7 +432,7 @@ int is_standard(char *dev, int *nump)
 	if (strncmp(d, "/d",2)==0)
 		d += 2, type=1; /* /dev/md/dN{pM} */
 	else if (strncmp(d, "/md_d", 5)==0)
-		d += 5, type=1; /* /dev/md_dNpM */
+		d += 5, type=1; /* /dev/md_dN{pM} */
 	else if (strncmp(d, "/md", 3)==0)
 		d += 3, type=-1; /* /dev/mdN */
 	else if (d-dev > 3 && strncmp(d-2, "md/", 3)==0)
@@ -467,8 +467,10 @@ int devlist_ready = 0;
 int add_dev(const char *name, const struct stat *stb, int flag, struct FTW *s)
 {
 	struct stat st;
+
 	if (S_ISLNK(stb->st_mode)) {
-		stat(name, &st);
+		if (stat(name, &st) != 0)
+			return 0;
 		stb = &st;
 	}
 
@@ -640,6 +642,23 @@ char *human_size_brief(long long bytes)
 			);
 	return buf;
 }
+
+void print_r10_layout(int layout)
+{
+	int near = layout & 255;
+	int far = (layout >> 8) & 255;
+	int offset = (layout&0x10000);
+	char *sep = "";
+
+	if (near != 1) {
+		printf("%s near=%d", sep, near);
+		sep = ",";
+	}
+	if (far != 1)
+		printf("%s %s=%d", sep, offset?"offset":"far", far);
+	if (near*far == 1)
+		printf("NO REDUNDANCY");
+}
 #endif
 
 unsigned long long calc_array_size(int level, int raid_disks, int layout,
@@ -794,6 +813,14 @@ int dev_open(char *dev, int flags)
 	return fd;
 }
 
+int open_dev(int devnum)
+{
+	char buf[20];
+
+	sprintf(buf, "%d:%d", dev2major(devnum), dev2minor(devnum));
+	return dev_open(buf, O_RDWR);
+}
+
 int open_dev_excl(int devnum)
 {
 	char buf[20];
@@ -811,6 +838,32 @@ 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;
+}
+
+void wait_for(char *dev)
+{
+	int i;
+
+	for (i=0 ; i<25 ; i++) {
+		struct stat stb;
+		if (stat(dev, &stb) == 0)
+			return;
+		usleep(200000);
+	}
+}
+
 struct superswitch *superlist[] = { &super0, &super1, &super_ddf, &super_imsm, NULL };
 
 #if !defined(MDASSEMBLE) || defined(MDASSEMBLE) && defined(MDASSEMBLE_AUTO)
@@ -1099,13 +1152,34 @@ 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;
 
 }
 
@@ -1114,7 +1188,7 @@ int fd2devnum(int fd)
 	struct stat stb;
 	if (fstat(fd, &stb) == 0)
 		return stat2devnum(&stb);
-	return -1;
+	return NoMdDev;
 }
 
 int mdmon_running(int devnum)
@@ -1171,7 +1245,7 @@ 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));
@@ -1195,9 +1269,8 @@ int start_mdmon(int devnum)
 		for (i=0; paths[i]; i++)
 			if (paths[i][0])
 				execl(paths[i], "mdmon",
-				      map_dev(dev2major(devnum),
-					      dev2minor(devnum),
-					      1), NULL);
+				      devnum2devname(devnum),
+				      NULL);
 		exit(1);
 	case -1: fprintf(stderr, Name ": cannot run mdmon. "
 			 "Array remains readonly\n");
@@ -1210,9 +1283,9 @@ 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;