ext4_xattr: Changes to EA metadata handling macros

[lwext4.git] / include / ext4_xattr.h

diff --git a/include/ext4_xattr.h b/include/ext4_xattr.h
index 65eb7688baa50858bf6dc1677304565092f346c8..097fabf8dcbaeab7f6ed9d9e81136048c3efa1fc 100644 (file)
--- a/include/ext4_xattr.h
+++ b/include/ext4_xattr.h
@@ -43,6 +43,7 @@ extern "C" {
 
 #include "ext4_config.h"
 #include "ext4_types.h"
+#include "ext4_inode.h"
 #include "misc/tree.h"
 #include "misc/queue.h"
 
@@ -74,6 +75,40 @@ struct ext4_xattr_ref {
                ext4_xattr_item) root;
 };
 
+#define EXT4_XATTR_PAD_BITS            2
+#define EXT4_XATTR_PAD         (1<<EXT4_XATTR_PAD_BITS)
+#define EXT4_XATTR_ROUND               (EXT4_XATTR_PAD-1)
+#define EXT4_XATTR_LEN(name_len) \
+       (((name_len) + EXT4_XATTR_ROUND + \
+       sizeof(struct ext4_xattr_entry)) & ~EXT4_XATTR_ROUND)
+#define EXT4_XATTR_NEXT(entry) \
+       ((struct ext4_xattr_entry *)( \
+        (char *)(entry) + EXT4_XATTR_LEN((entry)->e_name_len)))
+#define EXT4_XATTR_SIZE(size) \
+       (((size) + EXT4_XATTR_ROUND) & ~EXT4_XATTR_ROUND)
+#define EXT4_XATTR_NAME(entry) \
+       ((char *)((entry) + 1))
+
+#define EXT4_XATTR_IHDR(sb, raw_inode) \
+       ((struct ext4_xattr_ibody_header *) \
+               ((char *)raw_inode + \
+               EXT4_GOOD_OLD_INODE_SIZE + \
+               ext4_inode_get_extra_isize(sb, raw_inode)))
+#define EXT4_XATTR_IFIRST(hdr) \
+       ((struct ext4_xattr_entry *)((hdr)+1))
+
+#define EXT4_XATTR_BHDR(block) \
+       ((struct ext4_xattr_header *)((block)->data))
+#define EXT4_XATTR_ENTRY(ptr) \
+       ((struct ext4_xattr_entry *)(ptr))
+#define EXT4_XATTR_BFIRST(block) \
+       EXT4_XATTR_ENTRY(EXT4_XATTR_BHDR(block)+1)
+#define EXT4_XATTR_IS_LAST_ENTRY(entry) \
+       (*(uint32_t *)(entry) == 0)
+
+#define EXT4_ZERO_XATTR_VALUE ((void *)-1)
+
+
 #define EXT4_XATTR_ITERATE_CONT 0
 #define EXT4_XATTR_ITERATE_STOP 1
 #define EXT4_XATTR_ITERATE_PAUSE 2