[PATCH] Add the latest xattr support on mtd-utils

[KaiGai Kohei <kaigai@kaigai.gr.jp>]

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Hi,

This patch enables to pack xattr informations for _recent_ xattr
implementation.

When I posted a patch which enables to operate xattr on NAND
flash by using delete marker at Jun, the format of xref node
was a bit changed.
As 'xseqno' was added into struct jffs2_raw_xref, I ought to
post a patch to modify it. But I left for posting.

Please apply it, Thanks.
-- 
KaiGai Kohei <kaigai@kaigai.gr.jp>

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diff --git a/include/linux/jffs2.h b/include/linux/jffs2.h
index 2cac60e..8fc99e5 100644
--- a/include/linux/jffs2.h
+++ b/include/linux/jffs2.h
@@ -186,6 +186,7 @@ struct jffs2_raw_xref
 	jint32_t hdr_crc;
 	jint32_t ino;		/* inode number */
 	jint32_t xid;		/* XATTR identifier number */
+	jint32_t xseqno;	/* xref sequencial number */
 	jint32_t node_crc;
 } __attribute__((packed));
 
diff --git a/mkfs.jffs2.c b/mkfs.jffs2.c
index fa4a5f3..c460a7b 100644
--- a/mkfs.jffs2.c
+++ b/mkfs.jffs2.c
@@ -1038,6 +1038,7 @@ typedef struct xattr_entry {
 #define XATTR_BUFFER_SIZE		(64 * 1024)	/* 64KB */
 static uint32_t enable_xattr = 0;
 static uint32_t highest_xid = 0;
+static uint32_t highest_xseqno = 0;
 
 static struct {
 	int xprefix;
@@ -1244,6 +1245,7 @@ static void write_xattr_entry(struct fil
 		ref.hdr_crc = cpu_to_je32(crc32(0, &ref, sizeof(struct jffs2_unknown_node) - 4));
 		ref.ino = cpu_to_je32(e->sb.st_ino);
 		ref.xid = cpu_to_je32(xe->xid);
+		ref.xseqno = cpu_to_je32(highest_xseqno += 2);
 		ref.node_crc = cpu_to_je32(crc32(0, &ref, sizeof(ref) - 4));
 
 		pad_block_if_less_than(sizeof(ref));