Changeset b7e0260 in mainline

Timestamp:

2012-01-22T12:29:41Z (13 years ago)

Author:

Frantisek Princ <frantisek.princ@…>

Branches:

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

Children:

d9bbe45

Parents:

c38e417

Message:

Completed code for adding directory entry without index

File:

• uspace/lib/ext4/libext4_directory.c (modified) (2 diffs)

uspace/lib/ext4/libext4_directory.c

@@ -239 +239 @@
 }
 
+/**
+ * Fill data block with invalid directory entry.
+ */
+static int ext4_directory_init_block(ext4_filesystem_t *fs, uint32_t fblock)
+{
+        int rc;
+
+        block_t *block;
+        rc = block_get(&block, fs->device, fblock, BLOCK_FLAGS_NOREAD);
+        if (rc != EOK) {
+                return rc;
+        }
+
+        ext4_directory_entry_ll_t *entry = block->data;
+        uint32_t block_size = ext4_superblock_get_block_size(fs->superblock);
+
+        ext4_directory_entry_ll_set_entry_length(entry, block_size);
+        ext4_directory_entry_ll_set_inode(entry, 0);
+        ext4_directory_entry_ll_set_name_length(fs->superblock, entry, 0);
+        entry->name[0] = 0;
+
+        block->dirty = true;
+        return block_put(block);
+}
+
 int ext4_directory_add_entry(ext4_filesystem_t *fs, ext4_inode_ref_t * inode_ref,
                 const char *entry_name, uint32_t child_inode)
@@ -306 +331 @@
         }
 
-        // TODO - no free space found - alloc data block
-        // and fill the whole block with new entry
-
-        // TODO
-        return EOK;
+        // Save position and destroy iterator
+        aoff64_t pos = it.current_offset;
+        ext4_directory_iterator_fini(&it);
+
+        // Compute next block index and allocate data block
+        uint32_t block_size = ext4_superblock_get_block_size(fs->superblock);
+        uint32_t block_idx = pos / block_size;
+
+        uint32_t fblock;
+        rc = ext4_filesystem_get_inode_data_block_index(fs, inode_ref->inode, block_idx, &fblock);
+        if (rc != EOK) {
+                return rc;
+        }
+
+        if (fblock == 0) {
+                rc =  ext4_balloc_alloc_block(fs, inode_ref, &fblock);
+                if (rc != EOK) {
+                        return rc;
+                }
+
+                rc = ext4_filesystem_set_inode_data_block_index(fs, inode_ref, block_idx, fblock);
+                if (rc != EOK) {
+                        ext4_balloc_free_block(fs, inode_ref, fblock);
+                        return rc;
+                }
+
+                inode_ref->dirty = true;
+
+                rc = ext4_directory_init_block(fs, fblock);
+                if (rc != EOK) {
+                        return rc;
+                }
+        }
+
+        rc = ext4_directory_iterator_init(&it, fs, inode_ref, pos);
+        if (rc != EOK) {
+                return rc;
+        }
+
+        // Entry length is not affected
+        ext4_directory_entry_ll_set_inode(it.current, child_inode);
+        ext4_directory_entry_ll_set_name_length(fs->superblock, it.current, name_len);
+        memcpy(it.current->name, entry_name, name_len);
+
+        it.current_block->dirty = true;
+
+        return ext4_directory_iterator_fini(&it);
 }