mtd/include/linux jffs2.h,1.24,1.25

[David Woodhouse]

Update of /home/cvs/mtd/include/linux
In directory phoenix.infradead.org:/tmp/cvs-serv7536/include/linux

Modified Files:
	jffs2.h 
Log Message:
Byte-swapping code at last. Whether it's BE, LE or native is controlled by 
a #define in jffs2.h for now.


Index: jffs2.h
===================================================================
RCS file: /home/cvs/mtd/include/linux/jffs2.h,v
retrieving revision 1.24
retrieving revision 1.25
diff -u -r1.24 -r1.25
--- jffs2.h	20 May 2002 14:56:37 -0000	1.24
+++ jffs2.h	20 Aug 2002 21:37:27 -0000	1.25
@@ -68,30 +68,65 @@
 					   compression type */
 
 
+/* These can go once we've made sure we've caught all uses without
+   byteswapping */
+
+typedef struct {
+	uint32_t v32;
+} __attribute__((packed))  jint32_t;
+
+typedef struct {
+	uint16_t v16;
+} __attribute__((packed)) jint16_t;
+
+#define JFFS2_NATIVE_ENDIAN
+
+#if defined(JFFS2_NATIVE_ENDIAN)
+#define cpu_to_je16(x) ((jint16_t){x})
+#define cpu_to_je32(x) ((jint32_t){x})
+
+#define je16_to_cpu(x) ((x).v16)
+#define je32_to_cpu(x) ((x).v32)
+#elif defined(JFFS2_BIG_ENDIAN)
+#define cpu_to_je16(x) ((jint16_t){cpu_to_be16(x)})
+#define cpu_to_je32(x) ((jint32_t){cpu_to_be32(x)})
+
+#define je16_to_cpu(x) (be16_to_cpu(x.v16))
+#define je32_to_cpu(x) (be32_to_cpu(x.v32))
+#elif defined(JFFS2_LITTLE_ENDIAN)
+#define cpu_to_je16(x) ((jint16_t){cpu_to_le16(x)})
+#define cpu_to_je32(x) ((jint32_t){cpu_to_le32(x)})
+
+#define je16_to_cpu(x) (le16_to_cpu(x.v16))
+#define je32_to_cpu(x) (le32_to_cpu(x.v32))
+#else 
+#error wibble
+#endif
+
 struct jffs2_unknown_node
 {
 	/* All start like this */
-	uint16_t magic;
-	uint16_t nodetype;
-	uint32_t totlen; /* So we can skip over nodes we don't grok */
-	uint32_t hdr_crc;
+	jint16_t magic;
+	jint16_t nodetype;
+	jint32_t totlen; /* So we can skip over nodes we don't grok */
+	jint32_t hdr_crc;
 } __attribute__((packed));
 
 struct jffs2_raw_dirent
 {
-	uint16_t magic;
-	uint16_t nodetype;	/* == JFFS_NODETYPE_DIRENT */
-	uint32_t totlen;
-	uint32_t hdr_crc;
-	uint32_t pino;
-	uint32_t version;
-	uint32_t ino; /* == zero for unlink */
-	uint32_t mctime;
+	jint16_t magic;
+	jint16_t nodetype;	/* == JFFS_NODETYPE_DIRENT */
+	jint32_t totlen;
+	jint32_t hdr_crc;
+	jint32_t pino;
+	jint32_t version;
+	jint32_t ino; /* == zero for unlink */
+	jint32_t mctime;
 	uint8_t nsize;
 	uint8_t type;
 	uint8_t unused[2];
-	uint32_t node_crc;
-	uint32_t name_crc;
+	jint32_t node_crc;
+	jint32_t name_crc;
 	uint8_t name[0];
 } __attribute__((packed));
 
@@ -103,27 +138,27 @@
 */
 struct jffs2_raw_inode
 {
-	uint16_t magic;      /* A constant magic number.  */
-	uint16_t nodetype;   /* == JFFS_NODETYPE_INODE */
-	uint32_t totlen;     /* Total length of this node (inc data, etc.) */
-	uint32_t hdr_crc;
-	uint32_t ino;        /* Inode number.  */
-	uint32_t version;    /* Version number.  */
-	uint32_t mode;       /* The file's type or mode.  */
-	uint16_t uid;        /* The file's owner.  */
-	uint16_t gid;        /* The file's group.  */
-	uint32_t isize;      /* Total resultant size of this inode (used for truncations)  */
-	uint32_t atime;      /* Last access time.  */
-	uint32_t mtime;      /* Last modification time.  */
-	uint32_t ctime;      /* Change time.  */
-	uint32_t offset;     /* Where to begin to write.  */
-	uint32_t csize;      /* (Compressed) data size */
-	uint32_t dsize;	     /* Size of the node's data. (after decompression) */
+	jint16_t magic;      /* A constant magic number.  */
+	jint16_t nodetype;   /* == JFFS_NODETYPE_INODE */
+	jint32_t totlen;     /* Total length of this node (inc data, etc.) */
+	jint32_t hdr_crc;
+	jint32_t ino;        /* Inode number.  */
+	jint32_t version;    /* Version number.  */
+	jint32_t mode;       /* The file's type or mode.  */
+	jint16_t uid;        /* The file's owner.  */
+	jint16_t gid;        /* The file's group.  */
+	jint32_t isize;      /* Total resultant size of this inode (used for truncations)  */
+	jint32_t atime;      /* Last access time.  */
+	jint32_t mtime;      /* Last modification time.  */
+	jint32_t ctime;      /* Change time.  */
+	jint32_t offset;     /* Where to begin to write.  */
+	jint32_t csize;      /* (Compressed) data size */
+	jint32_t dsize;	     /* Size of the node's data. (after decompression) */
 	uint8_t compr;       /* Compression algorithm used */
 	uint8_t usercompr;   /* Compression algorithm requested by the user */
-	uint16_t flags;	     /* See JFFS2_INO_FLAG_* */
-	uint32_t data_crc;   /* CRC for the (compressed) data.  */
-	uint32_t node_crc;   /* CRC for the raw inode (excluding data)  */
+	jint16_t flags;	     /* See JFFS2_INO_FLAG_* */
+	jint32_t data_crc;   /* CRC for the (compressed) data.  */
+	jint32_t node_crc;   /* CRC for the raw inode (excluding data)  */
 //	uint8_t data[dsize];
 } __attribute__((packed));