erofs: remove all the byte offset comments
As Christoph suggested [1], "Please remove all the byte offset comments. that is something that can easily be checked with gdb or pahole." [1] https://lore.kernel.org/r/20190829095954.GB20598@infradead.org/ Reported-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Gao Xiang <gaoxiang25@huawei.com> Link: https://lore.kernel.org/r/20190904020912.63925-2-gaoxiang25@huawei.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -17,27 +17,28 @@
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#define EROFS_REQUIREMENT_LZ4_0PADDING 0x00000001
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#define EROFS_ALL_REQUIREMENTS EROFS_REQUIREMENT_LZ4_0PADDING
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/* 128-byte erofs on-disk super block */
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struct erofs_super_block {
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/* 0 */__le32 magic; /* in the little endian */
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/* 4 */__le32 checksum; /* crc32c(super_block) */
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/* 8 */__le32 features; /* (aka. feature_compat) */
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/* 12 */__u8 blkszbits; /* support block_size == PAGE_SIZE only */
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/* 13 */__u8 reserved;
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__le32 magic; /* file system magic number */
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__le32 checksum; /* crc32c(super_block) */
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__le32 features; /* (aka. feature_compat) */
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__u8 blkszbits; /* support block_size == PAGE_SIZE only */
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__u8 reserved;
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/* 14 */__le16 root_nid;
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/* 16 */__le64 inos; /* total valid ino # (== f_files - f_favail) */
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__le16 root_nid; /* nid of root directory */
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__le64 inos; /* total valid ino # (== f_files - f_favail) */
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/* 24 */__le64 build_time; /* inode v1 time derivation */
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/* 32 */__le32 build_time_nsec;
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/* 36 */__le32 blocks; /* used for statfs */
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/* 40 */__le32 meta_blkaddr;
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/* 44 */__le32 xattr_blkaddr;
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/* 48 */__u8 uuid[16]; /* 128-bit uuid for volume */
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/* 64 */__u8 volume_name[16]; /* volume name */
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/* 80 */__le32 requirements; /* (aka. feature_incompat) */
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__le64 build_time; /* inode v1 time derivation */
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__le32 build_time_nsec; /* inode v1 time derivation in nano scale */
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__le32 blocks; /* used for statfs */
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__le32 meta_blkaddr; /* start block address of metadata area */
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__le32 xattr_blkaddr; /* start block address of shared xattr area */
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__u8 uuid[16]; /* 128-bit uuid for volume */
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__u8 volume_name[16]; /* volume name */
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__le32 requirements; /* (aka. feature_incompat) */
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/* 84 */__u8 reserved2[44];
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} __packed; /* 128 bytes */
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__u8 reserved2[44];
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} __packed;
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/*
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* erofs inode data mapping:
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@ -73,16 +74,17 @@ static inline bool erofs_inode_is_data_compressed(unsigned int datamode)
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#define EROFS_I_VERSION_BIT 0
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#define EROFS_I_DATA_MAPPING_BIT 1
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/* 32-byte reduced form of an ondisk inode */
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struct erofs_inode_v1 {
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/* 0 */__le16 i_advise;
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__le16 i_advise; /* inode hints */
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/* 1 header + n-1 * 4 bytes inline xattr to keep continuity */
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/* 2 */__le16 i_xattr_icount;
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/* 4 */__le16 i_mode;
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/* 6 */__le16 i_nlink;
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/* 8 */__le32 i_size;
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/* 12 */__le32 i_reserved;
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/* 16 */union {
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__le16 i_xattr_icount;
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__le16 i_mode;
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__le16 i_nlink;
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__le32 i_size;
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__le32 i_reserved;
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union {
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/* file total compressed blocks for data mapping 1 */
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__le32 compressed_blocks;
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__le32 raw_blkaddr;
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@ -90,10 +92,10 @@ struct erofs_inode_v1 {
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/* for device files, used to indicate old/new device # */
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__le32 rdev;
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} i_u __packed;
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/* 20 */__le32 i_ino; /* only used for 32-bit stat compatibility */
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/* 24 */__le16 i_uid;
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/* 26 */__le16 i_gid;
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/* 28 */__le32 i_reserved2;
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__le32 i_ino; /* only used for 32-bit stat compatibility */
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__le16 i_uid;
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__le16 i_gid;
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__le32 i_reserved2;
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} __packed;
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/* 32 bytes on-disk inode */
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@ -101,15 +103,16 @@ struct erofs_inode_v1 {
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/* 64 bytes on-disk inode */
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#define EROFS_INODE_LAYOUT_V2 1
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/* 64-byte complete form of an ondisk inode */
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struct erofs_inode_v2 {
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/* 0 */__le16 i_advise;
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__le16 i_advise; /* inode hints */
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/* 1 header + n-1 * 4 bytes inline xattr to keep continuity */
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/* 2 */__le16 i_xattr_icount;
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/* 4 */__le16 i_mode;
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/* 6 */__le16 i_reserved;
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/* 8 */__le64 i_size;
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/* 16 */union {
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__le16 i_xattr_icount;
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__le16 i_mode;
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__le16 i_reserved;
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__le64 i_size;
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union {
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/* file total compressed blocks for data mapping 1 */
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__le32 compressed_blocks;
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__le32 raw_blkaddr;
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@ -119,15 +122,15 @@ struct erofs_inode_v2 {
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} i_u __packed;
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/* only used for 32-bit stat compatibility */
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/* 20 */__le32 i_ino;
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__le32 i_ino;
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/* 24 */__le32 i_uid;
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/* 28 */__le32 i_gid;
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/* 32 */__le64 i_ctime;
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/* 40 */__le32 i_ctime_nsec;
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/* 44 */__le32 i_nlink;
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/* 48 */__u8 i_reserved2[16];
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} __packed; /* 64 bytes */
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__le32 i_uid;
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__le32 i_gid;
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__le64 i_ctime;
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__le32 i_ctime_nsec;
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__le32 i_nlink;
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__u8 i_reserved2[16];
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} __packed;
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#define EROFS_MAX_SHARED_XATTRS (128)
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/* h_shared_count between 129 ... 255 are special # */
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@ -264,7 +267,7 @@ struct z_erofs_vle_decompressed_index {
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* [1] - pointing to the tail cluster
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*/
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__le16 delta[2];
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} di_u __packed; /* 8 bytes */
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} di_u __packed;
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} __packed;
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#define Z_EROFS_VLE_LEGACY_INDEX_ALIGN(size) \
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@ -273,10 +276,10 @@ struct z_erofs_vle_decompressed_index {
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/* dirent sorts in alphabet order, thus we can do binary search */
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struct erofs_dirent {
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__le64 nid; /* 0, node number */
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__le16 nameoff; /* 8, start offset of file name */
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__u8 file_type; /* 10, file type */
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__u8 reserved; /* 11, reserved */
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__le64 nid; /* node number */
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__le16 nameoff; /* start offset of file name */
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__u8 file_type; /* file type */
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__u8 reserved; /* reserved */
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} __packed;
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/*
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