diff options
| -rw-r--r-- | fs/erofs/erofs_fs.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h index 1a4a614895c6..71a4b3c83132 100644 --- a/fs/erofs/erofs_fs.h +++ b/fs/erofs/erofs_fs.h @@ -76,7 +76,8 @@ struct erofs_super_block { __le16 extra_devices; /* # of devices besides the primary device */ __le16 devt_slotoff; /* startoff = devt_slotoff * devt_slotsize */ __u8 dirblkbits; /* directory block size in bit shift */ - __u8 reserved[5]; + __u8 xattr_prefix_count; /* # of long xattr name prefixes */ + __le32 xattr_prefix_start; /* start of long xattr prefixes */ __le64 packed_nid; /* nid of the special packed inode */ __u8 reserved2[24]; }; @@ -211,6 +212,13 @@ struct erofs_xattr_ibody_header { #define EROFS_XATTR_INDEX_LUSTRE 5 #define EROFS_XATTR_INDEX_SECURITY 6 +/* + * bit 7 of e_name_index is set when it refers to a long xattr name prefix, + * while the remained lower bits represent the index of the prefix. + */ +#define EROFS_XATTR_LONG_PREFIX 0x80 +#define EROFS_XATTR_LONG_PREFIX_MASK 0x7f + /* xattr entry (for both inline & shared xattrs) */ struct erofs_xattr_entry { __u8 e_name_len; /* length of name */ @@ -220,6 +228,12 @@ struct erofs_xattr_entry { char e_name[]; /* attribute name */ }; +/* long xattr name prefix */ +struct erofs_xattr_long_prefix { + __u8 base_index; /* short xattr name prefix index */ + char infix[]; /* infix apart from short prefix */ +}; + static inline unsigned int erofs_xattr_ibody_size(__le16 i_xattr_icount) { if (!i_xattr_icount) |