cmd: avb: rework prints

Simplify and add more context for prints where it's needed.

Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20240209192045.3961832-5-igor.opaniuk@foundries.io
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>

1 files changed, 75 insertions, 48 deletions

diff --git a/cmd/avb.c b/cmd/avb.c
index ce8b638..62a3ee1 100644
--- a/cmd/avb.c
+++ b/cmd/avb.c
@@ -11,6 +11,7 @@
 #include <mmc.h>
 
 #define AVB_BOOTARGS	"avb_bootargs"
+
 static struct AvbOps *avb_ops;
 
 int do_avb_init(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
@@ -28,8 +29,10 @@ int do_avb_init(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 	avb_ops = avb_ops_alloc(mmc_dev);
 	if (avb_ops)
 		return CMD_RET_SUCCESS;
+	else
+		printf("Can't allocate AvbOps");
 
-	printf("Failed to initialize avb2\n");
+	printf("Failed to initialize AVB\n");
 
 	return CMD_RET_FAILURE;
 }
@@ -41,10 +44,11 @@ int do_avb_read_part(struct cmd_tbl *cmdtp, int flag, int argc,
 	s64 offset;
 	size_t bytes, bytes_read = 0;
 	void *buffer;
+	int ret;
 
 	if (!avb_ops) {
-		printf("AVB 2.0 is not initialized, please run 'avb init'\n");
-		return CMD_RET_USAGE;
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
+		return CMD_RET_FAILURE;
 	}
 
 	if (argc != 5)
@@ -55,14 +59,15 @@ int do_avb_read_part(struct cmd_tbl *cmdtp, int flag, int argc,
 	bytes = hextoul(argv[3], NULL);
 	buffer = (void *)hextoul(argv[4], NULL);
 
-	if (avb_ops->read_from_partition(avb_ops, part, offset, bytes,
-					 buffer, &bytes_read) ==
-					 AVB_IO_RESULT_OK) {
+	ret = avb_ops->read_from_partition(avb_ops, part, offset,
+					   bytes, buffer, &bytes_read);
+	if (ret == AVB_IO_RESULT_OK) {
 		printf("Read %zu bytes\n", bytes_read);
 		return CMD_RET_SUCCESS;
 	}
 
-	printf("Failed to read from partition\n");
+	printf("Failed to read from partition '%s', err = %d\n",
+	       part, ret);
 
 	return CMD_RET_FAILURE;
 }
@@ -74,10 +79,11 @@ int do_avb_read_part_hex(struct cmd_tbl *cmdtp, int flag, int argc,
 	s64 offset;
 	size_t bytes, bytes_read = 0;
 	char *buffer;
+	int ret;
 
 	if (!avb_ops) {
-		printf("AVB 2.0 is not initialized, please run 'avb init'\n");
-		return CMD_RET_USAGE;
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
+		return CMD_RET_FAILURE;
 	}
 
 	if (argc != 4)
@@ -94,8 +100,9 @@ int do_avb_read_part_hex(struct cmd_tbl *cmdtp, int flag, int argc,
 	}
 	memset(buffer, 0, bytes);
 
-	if (avb_ops->read_from_partition(avb_ops, part, offset, bytes, buffer,
-					 &bytes_read) == AVB_IO_RESULT_OK) {
+	ret = avb_ops->read_from_partition(avb_ops, part, offset,
+					   bytes, buffer, &bytes_read);
+	if (ret == AVB_IO_RESULT_OK) {
 		printf("Requested %zu, read %zu bytes\n", bytes, bytes_read);
 		printf("Data: ");
 		for (int i = 0; i < bytes_read; i++)
@@ -107,7 +114,8 @@ int do_avb_read_part_hex(struct cmd_tbl *cmdtp, int flag, int argc,
 		return CMD_RET_SUCCESS;
 	}
 
-	printf("Failed to read from partition\n");
+	printf("Failed to read from partition '%s', err = %d\n",
+	       part, ret);
 
 	free(buffer);
 	return CMD_RET_FAILURE;
@@ -120,9 +128,10 @@ int do_avb_write_part(struct cmd_tbl *cmdtp, int flag, int argc,
 	s64 offset;
 	size_t bytes;
 	void *buffer;
+	int ret;
 
 	if (!avb_ops) {
-		printf("AVB 2.0 is not initialized, run 'avb init' first\n");
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
 		return CMD_RET_FAILURE;
 	}
 
@@ -134,13 +143,15 @@ int do_avb_write_part(struct cmd_tbl *cmdtp, int flag, int argc,
 	bytes = hextoul(argv[3], NULL);
 	buffer = (void *)hextoul(argv[4], NULL);
 
-	if (avb_ops->write_to_partition(avb_ops, part, offset, bytes, buffer) ==
-	    AVB_IO_RESULT_OK) {
+	ret = avb_ops->write_to_partition(avb_ops, part, offset,
+					  bytes, buffer);
+	if (ret == AVB_IO_RESULT_OK) {
 		printf("Wrote %zu bytes\n", bytes);
 		return CMD_RET_SUCCESS;
 	}
 
-	printf("Failed to write in partition\n");
+	printf("Failed to write in partition '%s', err = %d\n",
+	       part, ret);
 
 	return CMD_RET_FAILURE;
 }
@@ -150,9 +161,10 @@ int do_avb_read_rb(struct cmd_tbl *cmdtp, int flag, int argc,
 {
 	size_t index;
 	u64 rb_idx;
+	int ret;
 
 	if (!avb_ops) {
-		printf("AVB 2.0 is not initialized, run 'avb init' first\n");
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
 		return CMD_RET_FAILURE;
 	}
 
@@ -161,13 +173,14 @@ int do_avb_read_rb(struct cmd_tbl *cmdtp, int flag, int argc,
 
 	index = (size_t)hextoul(argv[1], NULL);
 
-	if (avb_ops->read_rollback_index(avb_ops, index, &rb_idx) ==
-	    AVB_IO_RESULT_OK) {
+	ret = avb_ops->read_rollback_index(avb_ops, index, &rb_idx);
+	if (ret == AVB_IO_RESULT_OK) {
 		printf("Rollback index: %llx\n", rb_idx);
 		return CMD_RET_SUCCESS;
 	}
 
-	printf("Failed to read rollback index\n");
+	printf("Failed to read rollback index id = %zu, err = %d\n",
+	       index, ret);
 
 	return CMD_RET_FAILURE;
 }
@@ -177,9 +190,10 @@ int do_avb_write_rb(struct cmd_tbl *cmdtp, int flag, int argc,
 {
 	size_t index;
 	u64 rb_idx;
+	int ret;
 
 	if (!avb_ops) {
-		printf("AVB 2.0 is not initialized, run 'avb init' first\n");
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
 		return CMD_RET_FAILURE;
 	}
 
@@ -189,11 +203,12 @@ int do_avb_write_rb(struct cmd_tbl *cmdtp, int flag, int argc,
 	index = (size_t)hextoul(argv[1], NULL);
 	rb_idx = hextoul(argv[2], NULL);
 
-	if (avb_ops->write_rollback_index(avb_ops, index, rb_idx) ==
-	    AVB_IO_RESULT_OK)
+	ret = avb_ops->write_rollback_index(avb_ops, index, rb_idx);
+	if (ret == AVB_IO_RESULT_OK)
 		return CMD_RET_SUCCESS;
 
-	printf("Failed to write rollback index\n");
+	printf("Failed to write rollback index id = %zu, err = %d\n",
+	       index, ret);
 
 	return CMD_RET_FAILURE;
 }
@@ -203,9 +218,10 @@ int do_avb_get_uuid(struct cmd_tbl *cmdtp, int flag,
 {
 	const char *part;
 	char buffer[UUID_STR_LEN + 1];
+	int ret;
 
 	if (!avb_ops) {
-		printf("AVB 2.0 is not initialized, run 'avb init' first\n");
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
 		return CMD_RET_FAILURE;
 	}
 
@@ -214,14 +230,16 @@ int do_avb_get_uuid(struct cmd_tbl *cmdtp, int flag,
 
 	part = argv[1];
 
-	if (avb_ops->get_unique_guid_for_partition(avb_ops, part, buffer,
-						   UUID_STR_LEN + 1) ==
-						   AVB_IO_RESULT_OK) {
+	ret = avb_ops->get_unique_guid_for_partition(avb_ops, part,
+						     buffer,
+						     UUID_STR_LEN + 1);
+	if (ret == AVB_IO_RESULT_OK) {
 		printf("'%s' UUID: %s\n", part, buffer);
 		return CMD_RET_SUCCESS;
 	}
 
-	printf("Failed to read UUID\n");
+	printf("Failed to read partition '%s' UUID, err = %d\n",
+	       part, ret);
 
 	return CMD_RET_FAILURE;
 }
@@ -235,12 +253,13 @@ int do_avb_verify_part(struct cmd_tbl *cmdtp, int flag,
 	char *cmdline;
 	char *extra_args;
 	char *slot_suffix = "";
+	int ret;
 
 	bool unlocked = false;
 	int res = CMD_RET_FAILURE;
 
 	if (!avb_ops) {
-		printf("AVB 2.0 is not initialized, run 'avb init' first\n");
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
 		return CMD_RET_FAILURE;
 	}
 
@@ -253,9 +272,10 @@ int do_avb_verify_part(struct cmd_tbl *cmdtp, int flag,
 	printf("## Android Verified Boot 2.0 version %s\n",
 	       avb_version_string());
 
-	if (avb_ops->read_is_device_unlocked(avb_ops, &unlocked) !=
-	    AVB_IO_RESULT_OK) {
-		printf("Can't determine device lock state.\n");
+	ret = avb_ops->read_is_device_unlocked(avb_ops, &unlocked);
+	if (ret != AVB_IO_RESULT_OK) {
+		printf("Can't determine device lock state, err = %d\n",
+		       ret);
 		return CMD_RET_FAILURE;
 	}
 
@@ -302,10 +322,10 @@ int do_avb_verify_part(struct cmd_tbl *cmdtp, int flag,
 		printf("Corrupted dm-verity metadata detected\n");
 		break;
 	case AVB_SLOT_VERIFY_RESULT_ERROR_UNSUPPORTED_VERSION:
-		printf("Unsupported version avbtool was used\n");
+		printf("Unsupported version of avbtool was used\n");
 		break;
 	case AVB_SLOT_VERIFY_RESULT_ERROR_ROLLBACK_INDEX:
-		printf("Checking rollback index failed\n");
+		printf("Rollback index check failed\n");
 		break;
 	case AVB_SLOT_VERIFY_RESULT_ERROR_PUBLIC_KEY_REJECTED:
 		printf("Public key was rejected\n");
@@ -324,9 +344,10 @@ int do_avb_is_unlocked(struct cmd_tbl *cmdtp, int flag,
 		       int argc, char *const argv[])
 {
 	bool unlock;
+	int ret;
 
 	if (!avb_ops) {
-		printf("AVB not initialized, run 'avb init' first\n");
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
 		return CMD_RET_FAILURE;
 	}
 
@@ -335,13 +356,14 @@ int do_avb_is_unlocked(struct cmd_tbl *cmdtp, int flag,
 		return CMD_RET_USAGE;
 	}
 
-	if (avb_ops->read_is_device_unlocked(avb_ops, &unlock) ==
-	    AVB_IO_RESULT_OK) {
+	ret = avb_ops->read_is_device_unlocked(avb_ops, &unlock);
+	if (ret == AVB_IO_RESULT_OK) {
 		printf("Unlocked = %d\n", unlock);
 		return CMD_RET_SUCCESS;
 	}
 
-	printf("Can't determine device lock state.\n");
+	printf("Can't determine device lock state, err = %d\n",
+	       ret);
 
 	return CMD_RET_FAILURE;
 }
@@ -354,9 +376,10 @@ int do_avb_read_pvalue(struct cmd_tbl *cmdtp, int flag, int argc,
 	size_t bytes_read;
 	void *buffer;
 	char *endp;
+	int ret;
 
 	if (!avb_ops) {
-		printf("AVB 2.0 is not initialized, run 'avb init' first\n");
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
 		return CMD_RET_FAILURE;
 	}
 
@@ -372,15 +395,16 @@ int do_avb_read_pvalue(struct cmd_tbl *cmdtp, int flag, int argc,
 	if (!buffer)
 		return CMD_RET_FAILURE;
 
-	if (avb_ops->read_persistent_value(avb_ops, name, bytes, buffer,
-					   &bytes_read) == AVB_IO_RESULT_OK) {
+	ret = avb_ops->read_persistent_value(avb_ops, name, bytes,
+					     buffer, &bytes_read);
+	if (ret == AVB_IO_RESULT_OK) {
 		printf("Read %zu bytes, value = %s\n", bytes_read,
 		       (char *)buffer);
 		free(buffer);
 		return CMD_RET_SUCCESS;
 	}
 
-	printf("Failed to read persistent value\n");
+	printf("Failed to read persistent value, err = %d\n", ret);
 
 	free(buffer);
 
@@ -392,9 +416,10 @@ int do_avb_write_pvalue(struct cmd_tbl *cmdtp, int flag, int argc,
 {
 	const char *name;
 	const char *value;
+	int ret;
 
 	if (!avb_ops) {
-		printf("AVB 2.0 is not initialized, run 'avb init' first\n");
+		printf("AVB is not initialized, please run 'avb init <id>'\n");
 		return CMD_RET_FAILURE;
 	}
 
@@ -404,14 +429,16 @@ int do_avb_write_pvalue(struct cmd_tbl *cmdtp, int flag, int argc,
 	name = argv[1];
 	value = argv[2];
 
-	if (avb_ops->write_persistent_value(avb_ops, name, strlen(value) + 1,
-					    (const uint8_t *)value) ==
-	    AVB_IO_RESULT_OK) {
+	ret = avb_ops->write_persistent_value(avb_ops, name,
+					      strlen(value) + 1,
+					      (const uint8_t *)value);
+	if (ret == AVB_IO_RESULT_OK) {
 		printf("Wrote %zu bytes\n", strlen(value) + 1);
 		return CMD_RET_SUCCESS;
 	}
 
-	printf("Failed to write persistent value\n");
+	printf("Failed to write persistent value `%s` = `%s`, err = %d\n",
+	       name, value, ret);
 
 	return CMD_RET_FAILURE;
 }