X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=lib%2Fflash%2Fflash.c;h=3505cb4f959be52b5cf9068bb6e7b6359f980e83;hb=cf9e0cd6f7caf7b171457f7bf9f56f23ec3e478c;hp=b6188a07a3340d05def3b73300d2c39d201deb0a;hpb=a6bb8cc856f43730ee04f2bae7d974551560a420;p=petitboot

diff --git a/lib/flash/flash.c b/lib/flash/flash.c
index b6188a0..3505cb4 100644
--- a/lib/flash/flash.c
+++ b/lib/flash/flash.c
@@ -31,12 +31,14 @@
 #include <libflash/file.h>
 #include <libflash/ecc.h>
 
+#define SECURE_BOOT_HEADERS_SIZE 4096
+#define ROM_MAGIC_NUMBER 0x17082011
 
 struct flash_info {
 	/* Device information */
 	struct blocklevel_device	*bl;
 	struct ffs_handle		*ffs;
-	uint32_t			size;	/* raw size of partition */
+	uint64_t			size;	/* raw size of partition */
 	const char			*path;
 	bool				ecc;
 	uint32_t			erase_granule;
@@ -82,26 +84,26 @@ static struct flash_info *flash_setup_buffer(void *ctx, const char *partition)
 	rc = arch_flash_init(&info->bl, NULL, true);
 	if (rc) {
 		pb_log("Failed to init mtd device\n");
-		return NULL;
+		goto out;
 	}
 
 	rc = blocklevel_get_info(info->bl, &info->path, &info->size,
 				 &info->erase_granule);
 	if (rc) {
 		pb_log("Failed to retrieve blocklevel info\n");
-		return NULL;
+	        goto out_flash;
 	}
 
 	rc = ffs_init(0, info->size, info->bl, &info->ffs, 1);
 	if (rc) {
-		pb_log("%s: Failed to init ffs\n", __func__);
-		goto out;
+		pb_log_fn("Failed to init ffs\n");
+		goto out_flash;
 	}
 
 	rc = partition_info(info, partition);
 	if (rc) {
 		pb_log("Failed to retrieve partition info\n");
-		goto out;
+		goto out_ffs;
 	}
 
 	/* Check if there is a second flash side. If there is not, or
@@ -124,7 +126,7 @@ static struct flash_info *flash_setup_buffer(void *ctx, const char *partition)
 
 	pb_debug("%s Details\n", partition);
 	pb_debug("\tName\t\t%s\n", info->path);
-	pb_debug("\tFlash Size\t%u\n", info->size);
+	pb_debug("\tFlash Size\t%lu\n", info->size);
 	pb_debug("\tGranule\t\t%u\n", info->erase_granule);
 	pb_debug("\tECC\t\t%s\n", info->ecc ? "Protected" : "Unprotected");
 	pb_debug("\tCurrent Side info:\n");
@@ -139,12 +141,25 @@ static struct flash_info *flash_setup_buffer(void *ctx, const char *partition)
 	}
 
 	return info;
-out:
+out_ffs:
+	ffs_close(info->ffs);
+out_flash:
 	arch_flash_close(info->bl, NULL);
+out:
 	talloc_free(info);
 	return NULL;
 }
 
+/* See stb_is_container() in Skiboot */
+static bool is_signed(char *buffer, uint32_t len)
+{
+	if (!buffer || len <= SECURE_BOOT_HEADERS_SIZE)
+		return false;
+	if (be32_to_cpu(*(uint32_t *)buffer) != ROM_MAGIC_NUMBER)
+		return false;
+	return true;
+}
+
 int flash_parse_version(void *ctx, char ***versions, bool current)
 {
 	char *saveptr, *tok,  **tmp, *buffer;
@@ -168,7 +183,7 @@ int flash_parse_version(void *ctx, char ***versions, bool current)
 	len = cur_info->attr_data_len -  ecc_size(cur_info->attr_data_len);
 	buffer = talloc_array(cur_info, char, len);
 	if (!buffer) {
-		pb_log("%s: Failed to init buffer!\n", __func__);
+		pb_log_fn("Failed to init buffer!\n");
 		goto out;
 	}
 
@@ -179,12 +194,16 @@ int flash_parse_version(void *ctx, char ***versions, bool current)
 		goto out;
 	}
 
+	/* Check if this partition is signed */
+	if (is_signed(buffer, len))
+		buffer += SECURE_BOOT_HEADERS_SIZE;
+
 	/* open-power-platform */
 	tok = strtok_r(buffer, delim, &saveptr);
 	if (tok) {
 		tmp = talloc_realloc(ctx, tmp, char *, n + 1);
 		if (!tmp) {
-			pb_log("%s: Failed to allocate memory\n", __func__);
+			pb_log_fn("Failed to allocate memory\n");
 			goto out;
 		}
 		tmp[n++] = talloc_strdup(ctx, tok);
@@ -195,7 +214,7 @@ int flash_parse_version(void *ctx, char ***versions, bool current)
 		/* Ignore leading tab from subsequent lines */
 		tmp = talloc_realloc(ctx, tmp, char *, n + 1);
 		if (!tmp) {
-			pb_log("%s: Failed to reallocate memory\n", __func__);
+			pb_log_fn("Failed to reallocate memory\n");
 			n = 0;
 			goto out;
 		}