Changeset 936132f in mainline for uspace/lib/ext4/libext4_filesystem.c

Timestamp:

2012-04-08T12:19:12Z (12 years ago)

Author:

Frantisek Princ <frantisek.princ@…>

Branches:

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

Children:

b73530a

Parents:

847f2cb

Message:

extent file initialization and allocation

File:

• uspace/lib/ext4/libext4_filesystem.c (modified) (2 diffs)

uspace/lib/ext4/libext4_filesystem.c

@@ -342 +342 @@
         }
 
-        if (ext4_superblock_has_feature_incompatible(
-                        fs->superblock, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
-                ext4_inode_set_flag(inode, EXT4_INODE_FLAG_EXTENTS);
-        }
-
         ext4_inode_set_uid(inode, 0);
         ext4_inode_set_gid(inode, 0);
@@ -358 +353 @@
         ext4_inode_set_generation(inode, 0);
 
+        // Reset blocks array
         for (uint32_t i = 0; i < EXT4_INODE_BLOCKS; i++) {
                 inode->blocks[i] = 0;
+        }
+
+        if (ext4_superblock_has_feature_incompatible(
+                        fs->superblock, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
+
+                ext4_inode_set_flag(inode, EXT4_INODE_FLAG_EXTENTS);
+
+                // Initialize extent root header
+                ext4_extent_header_t *header = ext4_inode_get_extent_header(inode);
+                ext4_extent_header_set_depth(header, 0);
+                ext4_extent_header_set_entries_count(header, 0);
+                ext4_extent_header_set_generation(header, 0);
+                ext4_extent_header_set_magic(header, EXT4_EXTENT_MAGIC);
+
+                uint16_t max_entries = (EXT4_INODE_BLOCKS * sizeof (uint32_t) - sizeof(ext4_extent_header_t))
+                                / sizeof(ext4_extent_t);
+
+                ext4_extent_header_set_max_entries_count(header, max_entries);
         }