Changeset 1a7756a in mainline for uspace/lib/ext4/libext4_extent.h

Timestamp:

2011-10-12T09:37:59Z (14 years ago)

Author:

Frantisek Princ <frantisek.princ@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

1ccc32f

Parents:

8958a26

Message:

support for reading more complex extents (tree with nonzero depth)

File:

• uspace/lib/ext4/libext4_extent.h (modified) (2 diffs)

uspace/lib/ext4/libext4_extent.h

@@ -49 +49 @@
  * It's used at all the levels except the bottom.
  */
-typedef struct ext4_extent_idx {
-        uint32_t block; // Index covers logical blocks from 'block'
+typedef struct ext4_extent_index {
+        uint32_t first_block; // Index covers logical blocks from 'block'
         uint32_t leaf_lo; /* Pointer to the physical block of the next
                                            * level. leaf or next index could be there */
         uint16_t leaf_hi;     /* high 16 bits of physical block */
         uint16_t padding;
-} ext4_extent_idx_t;
+} ext4_extent_index_t;
 
 /*
@@ -71 +71 @@
 #define EXT4_EXTENT_FIRST(header)       \
                 ((ext4_extent_t *) (((void *) (header)) + sizeof(ext4_extent_header_t)))
+#define EXT4_EXTENT_FIRST_INDEX(header) \
+                ((ext4_extent_index_t *) (((void *) (header)) + sizeof(ext4_extent_header_t)))
 
 extern uint32_t ext4_extent_get_first_block(ext4_extent_t *);
 extern uint16_t ext4_extent_get_block_count(ext4_extent_t *);
 extern uint64_t ext4_extent_get_start(ext4_extent_t *);
+
+extern uint32_t ext4_extent_index_get_first_block(ext4_extent_index_t *);
+extern uint64_t ext4_extent_index_get_leaf(ext4_extent_index_t *);
 
 extern uint16_t ext4_extent_header_get_magic(ext4_extent_header_t *);