From: Thomas Weißschuh <thomas@t-8ch.de>
Date: Wed, 26 Oct 2022 14:04:27 +0000 (+0200)
Subject: libblkid: add blkid_probe_set_fsendianness()
X-Git-Tag: v2.39-rc1~453^2~6
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=8ace285b329314d678427b8487e05b317ae64109;p=thirdparty%2Futil-linux.git

libblkid: add blkid_probe_set_fsendianness()
---

diff --git a/libblkid/src/superblocks/superblocks.c b/libblkid/src/superblocks/superblocks.c
index 9f192edbc3..1c304bc2f6 100644
--- a/libblkid/src/superblocks/superblocks.c
+++ b/libblkid/src/superblocks/superblocks.c
@@ -626,6 +626,29 @@ int blkid_probe_set_fsblocksize(blkid_probe pr, uint32_t block_size)
 			block_size);
 }
 
+int blkid_probe_set_fsendianness(blkid_probe pr, enum BLKID_ENDIANNESS endianness)
+{
+	struct blkid_chain *chn = blkid_probe_get_chain(pr);
+
+	if (!(chn->flags & BLKID_SUBLKS_FSINFO))
+		return 0;
+
+	const char *value;
+
+	switch (endianness) {
+		case BLKID_ENDIANNESS_LITTLE:
+			value = "LITTLE";
+			break;
+		case BLKID_ENDIANNESS_BIG:
+			value = "BIG";
+			break;
+		default:
+			return -EINVAL;
+	}
+
+	return blkid_probe_sprintf_value(pr, "ENDIANNESS", "%s", value);
+}
+
 int blkid_probe_set_id_label(blkid_probe pr, const char *name,
 			     const unsigned char *data, size_t len)
 {
diff --git a/libblkid/src/superblocks/superblocks.h b/libblkid/src/superblocks/superblocks.h
index 8a1b85ddac..0d1c461a77 100644
--- a/libblkid/src/superblocks/superblocks.h
+++ b/libblkid/src/superblocks/superblocks.h
@@ -9,6 +9,18 @@
 
 #include "blkidP.h"
 
+enum BLKID_ENDIANNESS {
+	BLKID_ENDIANNESS_LITTLE,
+	BLKID_ENDIANNESS_BIG,
+};
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#define BLKID_ENDIANNESS_NATIVE BLKID_ENDIANNESS_LITTLE
+#define BLKID_ENDIANNESS_OTHER BLKID_ENDIANNESS_BIG
+#else
+#define BLKID_ENDIANNESS_NATIVE BLKID_ENDIANNESS_BIG
+#define BLKID_ENDIANNESS_OTHER BLKID_ENDIANNESS_LITTLE
+#endif
+
 extern const struct blkid_idinfo cramfs_idinfo;
 extern const struct blkid_idinfo swap_idinfo;
 extern const struct blkid_idinfo swsuspend_idinfo;
@@ -114,6 +126,7 @@ int blkid_probe_set_block_size(blkid_probe pr, unsigned block_size);
 int blkid_probe_set_fssize(blkid_probe pr, uint64_t size);
 int blkid_probe_set_fslastblock(blkid_probe pr, uint64_t lastblock);
 int blkid_probe_set_fsblocksize(blkid_probe pr, uint32_t block_size);
+int blkid_probe_set_fsendianness(blkid_probe pr, enum BLKID_ENDIANNESS endianness);
 
 extern int blkid_probe_is_bitlocker(blkid_probe pr);
 extern int blkid_probe_is_ntfs(blkid_probe pr);