ext4: change structure fields to __le/__be types

Change all the types of ext2/4 fields to little endian types and all the
JBD fields to big endian types. Now we can use sparse (make C=1) to check
for statements where we need byteswaps.

Signed-off-by: Michael Walle <michael@walle.cc>

fs/ext4/ext4_journal.h

@@ -49,9 +49,9 @@ struct dirty_blocks {
 
 /* Standard header for all descriptor blocks: */
 struct journal_header_t {
-	__u32 h_magic;
-	__u32 h_blocktype;
-	__u32 h_sequence;
+	__be32 h_magic;
+	__be32 h_blocktype;
+	__be32 h_sequence;
 };
 
 /* The journal superblock.  All fields are in big-endian byte order. */
@@ -60,35 +60,35 @@ struct journal_superblock_t {
 	struct journal_header_t s_header;
 
 	/* Static information describing the journal */
-	__u32 s_blocksize;	/* journal device blocksize */
-	__u32 s_maxlen;		/* total blocks in journal file */
-	__u32 s_first;		/* first block of log information */
+	__be32 s_blocksize;	/* journal device blocksize */
+	__be32 s_maxlen;		/* total blocks in journal file */
+	__be32 s_first;		/* first block of log information */
 
 	/* Dynamic information describing the current state of the log */
-	__u32 s_sequence;	/* first commit ID expected in log */
-	__u32 s_start;		/* blocknr of start of log */
+	__be32 s_sequence;	/* first commit ID expected in log */
+	__be32 s_start;		/* blocknr of start of log */
 
 	/* Error value, as set by journal_abort(). */
-	__s32 s_errno;
+	__be32 s_errno;
 
 	/* Remaining fields are only valid in a version-2 superblock */
-	__u32 s_feature_compat;	/* compatible feature set */
-	__u32 s_feature_incompat;	/* incompatible feature set */
-	__u32 s_feature_ro_compat;	/* readonly-compatible feature set */
+	__be32 s_feature_compat;	/* compatible feature set */
+	__be32 s_feature_incompat;	/* incompatible feature set */
+	__be32 s_feature_ro_compat;	/* readonly-compatible feature set */
 	/* 0x0030 */
 	__u8 s_uuid[16];	/* 128-bit uuid for journal */
 
 	/* 0x0040 */
-	__u32 s_nr_users;	/* Nr of filesystems sharing log */
+	__be32 s_nr_users;	/* Nr of filesystems sharing log */
 
-	__u32 s_dynsuper;	/* Blocknr of dynamic superblock copy */
+	__be32 s_dynsuper;	/* Blocknr of dynamic superblock copy */
 
 	/* 0x0048 */
-	__u32 s_max_transaction;	/* Limit of journal blocks per trans. */
-	__u32 s_max_trans_data;	/* Limit of data blocks per trans. */
+	__be32 s_max_transaction;	/* Limit of journal blocks per trans. */
+	__be32 s_max_trans_data;	/* Limit of data blocks per trans. */
 
 	/* 0x0050 */
-	__u32 s_padding[44];
+	__be32 s_padding[44];
 
 	/* 0x0100 */
 	__u8 s_users[16 * 48];	/* ids of all fs'es sharing the log */
@@ -96,13 +96,13 @@ struct journal_superblock_t {
 } ;
 
 struct ext3_journal_block_tag {
-	uint32_t block;
-	uint32_t flags;
+	__be32 block;
+	__be32 flags;
 };
 
 struct journal_revoke_header_t {
 	struct journal_header_t r_header;
-	int r_count;		/* Count of bytes used in the block */
+	__be32 r_count;		/* Count of bytes used in the block */
 };
 
 struct revoke_blk_list {

include/ext_common.h

@@ -66,92 +66,92 @@
 
 /* The ext2 superblock.  */
 struct ext2_sblock {
-	uint32_t total_inodes;
-	uint32_t total_blocks;
-	uint32_t reserved_blocks;
-	uint32_t free_blocks;
-	uint32_t free_inodes;
-	uint32_t first_data_block;
-	uint32_t log2_block_size;
-	uint32_t log2_fragment_size;
-	uint32_t blocks_per_group;
-	uint32_t fragments_per_group;
-	uint32_t inodes_per_group;
-	uint32_t mtime;
-	uint32_t utime;
-	uint16_t mnt_count;
-	uint16_t max_mnt_count;
-	uint16_t magic;
-	uint16_t fs_state;
-	uint16_t error_handling;
-	uint16_t minor_revision_level;
-	uint32_t lastcheck;
-	uint32_t checkinterval;
-	uint32_t creator_os;
-	uint32_t revision_level;
-	uint16_t uid_reserved;
-	uint16_t gid_reserved;
-	uint32_t first_inode;
-	uint16_t inode_size;
-	uint16_t block_group_number;
-	uint32_t feature_compatibility;
-	uint32_t feature_incompat;
-	uint32_t feature_ro_compat;
-	uint32_t unique_id[4];
+	__le32 total_inodes;
+	__le32 total_blocks;
+	__le32 reserved_blocks;
+	__le32 free_blocks;
+	__le32 free_inodes;
+	__le32 first_data_block;
+	__le32 log2_block_size;
+	__le32 log2_fragment_size;
+	__le32 blocks_per_group;
+	__le32 fragments_per_group;
+	__le32 inodes_per_group;
+	__le32 mtime;
+	__le32 utime;
+	__le16 mnt_count;
+	__le16 max_mnt_count;
+	__le16 magic;
+	__le16 fs_state;
+	__le16 error_handling;
+	__le16 minor_revision_level;
+	__le32 lastcheck;
+	__le32 checkinterval;
+	__le32 creator_os;
+	__le32 revision_level;
+	__le16 uid_reserved;
+	__le16 gid_reserved;
+	__le32 first_inode;
+	__le16 inode_size;
+	__le16 block_group_number;
+	__le32 feature_compatibility;
+	__le32 feature_incompat;
+	__le32 feature_ro_compat;
+	__le32 unique_id[4];
 	char volume_name[16];
 	char last_mounted_on[64];
-	uint32_t compression_info;
+	__le32 compression_info;
 };
 
 struct ext2_block_group {
-	__u32 block_id;	/* Blocks bitmap block */
-	__u32 inode_id;	/* Inodes bitmap block */
-	__u32 inode_table_id;	/* Inodes table block */
-	__u16 free_blocks;	/* Free blocks count */
-	__u16 free_inodes;	/* Free inodes count */
-	__u16 used_dir_cnt;	/* Directories count */
-	__u16 bg_flags;
-	__u32 bg_reserved[2];
-	__u16 bg_itable_unused; /* Unused inodes count */
-	__u16 bg_checksum;	/* crc16(s_uuid+grouo_num+group_desc)*/
+	__le32 block_id;	/* Blocks bitmap block */
+	__le32 inode_id;	/* Inodes bitmap block */
+	__le32 inode_table_id;	/* Inodes table block */
+	__le16 free_blocks;	/* Free blocks count */
+	__le16 free_inodes;	/* Free inodes count */
+	__le16 used_dir_cnt;	/* Directories count */
+	__le16 bg_flags;
+	__le32 bg_reserved[2];
+	__le16 bg_itable_unused; /* Unused inodes count */
+	__le16 bg_checksum;	/* crc16(s_uuid+grouo_num+group_desc)*/
 };
 
 /* The ext2 inode. */
 struct ext2_inode {
-	uint16_t mode;
-	uint16_t uid;
-	uint32_t size;
-	uint32_t atime;
-	uint32_t ctime;
-	uint32_t mtime;
-	uint32_t dtime;
-	uint16_t gid;
-	uint16_t nlinks;
-	uint32_t blockcnt;	/* Blocks of 512 bytes!! */
-	uint32_t flags;
-	uint32_t osd1;
+	__le16 mode;
+	__le16 uid;
+	__le32 size;
+	__le32 atime;
+	__le32 ctime;
+	__le32 mtime;
+	__le32 dtime;
+	__le16 gid;
+	__le16 nlinks;
+	__le32 blockcnt;	/* Blocks of 512 bytes!! */
+	__le32 flags;
+	__le32 osd1;
 	union {
 		struct datablocks {
-			uint32_t dir_blocks[INDIRECT_BLOCKS];
-			uint32_t indir_block;
-			uint32_t double_indir_block;
-			uint32_t triple_indir_block;
+			__le32 dir_blocks[INDIRECT_BLOCKS];
+			__le32 indir_block;
+			__le32 double_indir_block;
+			__le32 triple_indir_block;
 		} blocks;
 		char symlink[60];
 	} b;
-	uint32_t version;
-	uint32_t acl;
-	uint32_t dir_acl;
-	uint32_t fragment_addr;
-	uint32_t osd2[3];
+	__le32 version;
+	__le32 acl;
+	__le32 dir_acl;
+	__le32 fragment_addr;
+	__le32 osd2[3];
 };
 
 /* The header of an ext2 directory entry. */
 struct ext2_dirent {
-	uint32_t inode;
-	uint16_t direntlen;
-	uint8_t namelen;
-	uint8_t filetype;
+	__le32 inode;
+	__le16 direntlen;
+	__u8 namelen;
+	__u8 filetype;
 };
 
 struct ext2fs_node {