device-mapper-multipath/0014-RH-RHEL5-style-partitions.patch

---
 kpartx/bsd.c    |   35 ---------------
 kpartx/dos.c    |    7 +--
 kpartx/kpartx.c |  123 +++++++-------------------------------------------------
 kpartx/kpartx.h |    1 
 kpartx/sun.c    |   35 ---------------
 5 files changed, 24 insertions(+), 177 deletions(-)

Index: multipath-tools-120123/kpartx/bsd.c
===================================================================
--- multipath-tools-120123.orig/kpartx/bsd.c
+++ multipath-tools-120123/kpartx/bsd.c
@@ -50,10 +50,10 @@ int
 read_bsd_pt(int fd, struct slice all, struct slice *sp, int ns) {
 	struct bsd_disklabel *l;
 	struct bsd_partition *p;
-	unsigned int offset = all.start, end;
+	unsigned int offset = all.start;
 	int max_partitions;
 	char *bp;
-	int n = 0, i, j;
+	int n = 0;
 
 	bp = getblock(fd, offset+1);    /* 1 sector suffices */
 	if (bp == NULL)
@@ -79,36 +79,5 @@ read_bsd_pt(int fd, struct slice all, st
 			break;
 		}
 	}
-	/*
-	 * Convention has it that the bsd disklabel will always have
-	 * the 'c' partition spanning the entire disk.
-	 * So we have to check for contained slices.
-	 */
-	for(i = 0; i < n; i++) {
-		if (sp[i].size == 0)
-			continue;
-
-		end = sp[i].start + sp[i].size;
-		for(j = 0; j < n; j ++) {
-			if ( i == j )
-				continue;
-			if (sp[j].size == 0)
-				continue;
-
-			if (sp[i].start < sp[j].start) {
-				if (end > sp[j].start &&
-				    end < sp[j].start + sp[j].size) {
-					/* Invalid slice */
-					fprintf(stderr,
-						"bsd_disklabel: slice %d overlaps with %d\n", i , j);
-					sp[i].size = 0;
-				}
-			} else {
-				if (end <= sp[j].start + sp[j].size) {
-					sp[i].container = j + 1;
-				}
-			}
-		}
-	}
 	return n;
 }
Index: multipath-tools-120123/kpartx/dos.c
===================================================================
--- multipath-tools-120123.orig/kpartx/dos.c
+++ multipath-tools-120123/kpartx/dos.c
@@ -16,7 +16,7 @@ is_extended(int type) {
 }
 
 static int
-read_extended_partition(int fd, struct partition *ep, int en,
+read_extended_partition(int fd, struct partition *ep,
 			struct slice *sp, int ns)
 {
 	struct partition p;
@@ -53,7 +53,6 @@ read_extended_partition(int fd, struct p
 			if (n < ns) {
 				sp[n].start = here + le32_to_cpu(p.start_sect);
 				sp[n].size = le32_to_cpu(p.nr_sects);
-				sp[n].container = en + 1;
 				n++;
 			} else {
 				fprintf(stderr,
@@ -98,7 +97,9 @@ read_dos_pt(int fd, struct slice all, st
 			break;
 		}
 		if (is_extended(p.sys_type)) {
-			n += read_extended_partition(fd, &p, i, sp+n, ns-n);
+			n += read_extended_partition(fd, &p, sp+n, ns-n);
+			/* hide the extended partition itself */
+			sp[i].size = 2;
 		}
 	}
 	return n;
Index: multipath-tools-120123/kpartx/kpartx.c
===================================================================
--- multipath-tools-120123.orig/kpartx/kpartx.c
+++ multipath-tools-120123/kpartx/kpartx.c
@@ -190,7 +190,7 @@ get_hotplug_device(void)
 
 int
 main(int argc, char **argv){
-	int i, j, m, n, op, off, arg, c, d, ro=0;
+	int i, j, m, n, op, off, arg, ro=0;
 	int fd = -1;
 	struct slice all;
 	struct pt *ptp;
@@ -380,49 +380,30 @@ main(int argc, char **argv){
 		else
 			continue;
 
+		/*
+ 		 * test for overlap, as in the case of an extended partition
+ 		 * zero their size to avoid mapping
+ 		 */
+		for (j = 0; j < n; j++) {
+			for (m = j + 1; m < n; m++) {
+				if (slices[m].start > slices[j].start &&
+				    slices[m].start < slices[j].start +
+				    slices[j].size)
+					slices[j].size = 0;
+			}
+		}
+
 		switch(what) {
 		case LIST:
-			for (j = 0, c = 0, m = 0; j < n; j++) {
+			for (j = 0; j < n; j++) {
 				if (slices[j].size == 0)
 					continue;
-				if (slices[j].container > 0) {
-					c++;
-					continue;
-				}
-
-				slices[j].minor = m++;
 
 				printf("%s%s%d : 0 %" PRIu64 " %s %" PRIu64"\n",
 				       mapname, delim, j+1,
 				       slices[j].size, device,
 				       slices[j].start);
 			}
-			/* Loop to resolve contained slices */
-			d = c;
-			while (c) {
-				for (j = 0; j < n; j++) {
-					uint64_t start;
-					int k = slices[j].container - 1;
-
-					if (slices[j].size == 0)
-						continue;
-					if (slices[j].minor > 0)
-						continue;
-					if (slices[j].container == 0)
-						continue;
-					slices[j].minor = m++;
-
-					start = slices[j].start - slices[k].start;
-					printf("%s%s%d : 0 %" PRIu64 " /dev/dm-%d %" PRIu64 "\n",
-					       mapname, delim, j+1,
-					       slices[j].size,
-					       slices[k].minor, start);
-					c--;
-				}
-				/* Terminate loop if nothing more to resolve */
-				if (d == c)
-					break;
-			}
 
 			break;
 
@@ -461,16 +442,10 @@ main(int argc, char **argv){
 		case ADD:
 		case UPDATE:
 			/* ADD and UPDATE share the same code that adds new partitions. */
-			for (j = 0, c = 0; j < n; j++) {
+			for (j = 0; j < n; j++) {
 				if (slices[j].size == 0)
 					continue;
 
-				/* Skip all contained slices */
-				if (slices[j].container > 0) {
-					c++;
-					continue;
-				}
-
 				if (safe_sprintf(partname, "%s%s%d",
 					     mapname, delim, j+1)) {
 					fprintf(stderr, "partname too small\n");
@@ -511,72 +486,6 @@ main(int argc, char **argv){
 					       slices[j].minor, slices[j].size,
 					       DM_TARGET, params);
 			}
-			/* Loop to resolve contained slices */
-			d = c;
-			while (c) {
-				for (j = 0; j < n; j++) {
-					uint64_t start;
-					int k = slices[j].container - 1;
-
-					if (slices[j].size == 0)
-						continue;
-
-					/* Skip all existing slices */
-					if (slices[j].minor > 0)
-						continue;
-
-					/* Skip all simple slices */
-					if (slices[j].container == 0)
-						continue;
-
-					/* Check container slice */
-					if (slices[k].size == 0)
-						fprintf(stderr, "Invalid slice %d\n",
-							k);
-
-					if (safe_sprintf(partname, "%s%s%d",
-							 mapname, delim, j+1)) {
-						fprintf(stderr, "partname too small\n");
-						exit(1);
-					}
-					strip_slash(partname);
-
-					start = slices[j].start - slices[k].start;
-					if (safe_sprintf(params, "%d:%d %" PRIu64,
-							 slices[k].major,
-							 slices[k].minor,
-							 start)) {
-						fprintf(stderr, "params too small\n");
-						exit(1);
-					}
-
-					op = (dm_map_present(partname) ?
-					      DM_DEVICE_RELOAD : DM_DEVICE_CREATE);
-
-					dm_addmap(op, partname, DM_TARGET, params,
-						  slices[j].size, ro, uuid, j+1,
-						  buf.st_mode & 0777,
-						  buf.st_uid, buf.st_gid,
-						  &cookie);
-
-					if (op == DM_DEVICE_RELOAD)
-						dm_simplecmd(DM_DEVICE_RESUME,
-							     partname, 1,
-							     &cookie);
-
-					dm_devn(partname, &slices[j].major,
-						&slices[j].minor);
-
-					if (verbose)
-						printf("add map %s : 0 %" PRIu64 " %s %s\n",
-						       partname, slices[j].size,
-						       DM_TARGET, params);
-					c--;
-				}
-				/* Terminate loop */
-				if (d == c)
-					break;
-			}
 
 			if (what == ADD) {
 				/* Skip code that removes devmappings for deleted partitions */
Index: multipath-tools-120123/kpartx/kpartx.h
===================================================================
--- multipath-tools-120123.orig/kpartx/kpartx.h
+++ multipath-tools-120123/kpartx/kpartx.h
@@ -24,7 +24,6 @@
 struct slice {
 	uint64_t start;
 	uint64_t size;
-	int container;
 	int major;
 	int minor;
 };
Index: multipath-tools-120123/kpartx/sun.c
===================================================================
--- multipath-tools-120123.orig/kpartx/sun.c
+++ multipath-tools-120123/kpartx/sun.c
@@ -62,8 +62,8 @@ int
 read_sun_pt(int fd, struct slice all, struct slice *sp, int ns) {
 	struct sun_disk_label *l;
 	struct sun_raw_part *s;
-	unsigned int offset = all.start, end;
-	int i, j, n;
+	unsigned int offset = all.start;
+	int i, n;
 	char *bp;
 
 	bp = getblock(fd, offset);
@@ -95,37 +95,6 @@ read_sun_pt(int fd, struct slice all, st
 			break;
 		}
 	}
-	/*
-	 * Convention has it that the SUN disklabel will always have
-	 * the 'c' partition spanning the entire disk.
-	 * So we have to check for contained slices.
-	 */
-	for(i = 0; i < SUN_DISK_MAXPARTITIONS; i++) {
-		if (sp[i].size == 0)
-			continue;
-
-		end = sp[i].start + sp[i].size;
-		for(j = 0; j < SUN_DISK_MAXPARTITIONS; j ++) {
-			if ( i == j )
-				continue;
-			if (sp[j].size == 0)
-				continue;
-
-			if (sp[i].start < sp[j].start) {
-				if (end > sp[j].start &&
-				    end < sp[j].start + sp[j].size) {
-					/* Invalid slice */
-					fprintf(stderr,
-						"sun_disklabel: slice %d overlaps with %d\n", i , j);
-					sp[i].size = 0;
-				}
-			} else {
-				if (end <= sp[j].start + sp[j].size) {
-					sp[i].container = j + 1;
-				}
-			}
-		}
-	}
 	return n;
 }