[ptxdist] [PATCH] genimage: Add static UBI volumes support

[Ladislav Michl <ladis@linux-mips.org>]

Bare images (kernel, U-Boot, its environment) need to reside inside
static UBI volumes. Add read-only partition flag and use it for that
purpose. Also make partition's "image" voluntary as ubinize will yell
anyway. Once this behavior gets modified eventually, it will bring us
possibility to create empty volumes ready for runtime update.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>

---
 genimage.c  |    2 ++
 genimage.h  |    1 +
 image-ubi.c |   26 ++++++++++++++++----------
 3 files changed, 19 insertions(+), 10 deletions(-)

diff -ur genimage-8.orig/genimage.c genimage-8/genimage.c
--- genimage-8/genimage.c	2015-09-23 12:11:20.732052910 +0200
+++ genimage-8/genimage.c	2016-01-04 03:55:17.304593713 +0100
@@ -87,6 +87,7 @@
 	CFG_STR("size", NULL, CFGF_NONE),
 	CFG_INT("partition-type", 0, CFGF_NONE),
 	CFG_BOOL("bootable", cfg_false, CFGF_NONE),
+	CFG_BOOL("read-only", cfg_false, CFGF_NONE),
 	CFG_STR("image", NULL, CFGF_NONE),
 	CFG_BOOL("autoresize", 0, CFGF_NONE),
 	CFG_BOOL("in-partition-table", cfg_true, CFGF_NONE),
@@ -294,6 +295,7 @@
 		part->offset = cfg_getint_suffix(partsec, "offset");
 		part->partition_type = cfg_getint(partsec, "partition-type");
 		part->bootable = cfg_getbool(partsec, "bootable");
+		part->read_only = cfg_getbool(partsec, "read-only");
 		part->image = cfg_getstr(partsec, "image");
 		part->autoresize = cfg_getbool(partsec, "autoresize");
 		part->in_partition_table = cfg_getbool(partsec, "in-partition-table");
diff -ur genimage-8.orig/genimage.h genimage-8/genimage.h
--- genimage-8/genimage.h	2015-09-23 12:11:20.752052590 +0200
+++ genimage-8/genimage.h	2016-01-04 03:55:17.304593713 +0100
@@ -32,6 +32,7 @@
 	unsigned char partition_type;
 	cfg_bool_t bootable;
 	cfg_bool_t extended;
+	cfg_bool_t read_only;
 	const char *image;
 	struct list_head list;
 	int autoresize;
diff -ur genimage-8.orig/image-ubi.c genimage-8/image-ubi.c
--- genimage-8/image-ubi.c	2013-04-16 15:28:57.133432239 +0200
+++ genimage-8/image-ubi.c	2016-01-04 03:55:17.308593713 +0100
@@ -47,21 +47,27 @@
 	}
 
 	list_for_each_entry(part, &image->partitions, list) {
-		struct image *child;
-		child = image_get(part->image);
-		if (!child) {
-			image_error(image, "could not find %s\n", part->image);
-			fclose(fini);
-			ret = -EINVAL;
-			goto err_free;
+		struct image *child = NULL;
+		unsigned long long size = part->size;
+		if (part->image)
+			child = image_get(part->image);
+		if (!size) {
+			if (!child) {
+				image_error(image, "could not find %s\n", part->image);
+				fclose(fini);
+				ret = -EINVAL;
+				goto err_free;
+			}
+			size = child->size;
 		}
 
 		fprintf(fini, "[%s]\n", part->name);
 		fprintf(fini, "mode=ubi\n");
-		fprintf(fini, "image=%s\n", imageoutfile(child));
+		if (child)
+			fprintf(fini, "image=%s\n", imageoutfile(child));
 		fprintf(fini, "vol_id=%d\n", i);
-		fprintf(fini, "vol_size=%lld\n", child->size);
-		fprintf(fini, "vol_type=dynamic\n");
+		fprintf(fini, "vol_size=%lld\n", size);
+		fprintf(fini, "vol_type=%s\n", part->read_only ? "static" : "dynamic");
 		fprintf(fini, "vol_name=%s\n", part->name);
 		if (part->autoresize)
 			fprintf(fini, "vol_flags=autoresize\n");

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