- ei = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]),
- path->slots[0], struct btrfs_file_extent_item);
- btrfs_set_file_extent_generation(ei, trans->transid);
- btrfs_set_file_extent_type(ei,
- BTRFS_FILE_EXTENT_INLINE);
- ptr = btrfs_file_extent_inline_start(ei);
-
- kaddr = kmap_atomic(page, KM_USER0);
- btrfs_memcpy(root, path->nodes[0]->b_data,
- ptr, kaddr + page_offset, size);
- kunmap_atomic(kaddr, KM_USER0);
- btrfs_mark_buffer_dirty(path->nodes[0]);
+ if (ret == 1) {
+ struct btrfs_key found_key;
+
+ if (path->slots[0] == 0)
+ goto insert;
+
+ path->slots[0]--;
+ leaf = path->nodes[0];
+ btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
+
+ if (found_key.objectid != inode->i_ino)
+ goto insert;
+
+ if (found_key.type != BTRFS_EXTENT_DATA_KEY)
+ goto insert;
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+
+ if (btrfs_file_extent_type(leaf, ei) !=
+ BTRFS_FILE_EXTENT_INLINE) {
+ goto insert;
+ }
+ btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
+ ret = 0;
+ }
+ if (ret == 0) {
+ u32 found_size;
+ u64 found_end;
+
+ leaf = path->nodes[0];
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+
+ if (btrfs_file_extent_type(leaf, ei) !=
+ BTRFS_FILE_EXTENT_INLINE) {
+ err = ret;
+ btrfs_print_leaf(root, leaf);
+ printk("found wasn't inline offset %Lu inode %lu\n",
+ offset, inode->i_ino);
+ goto fail;
+ }
+ found_size = btrfs_file_extent_inline_len(leaf,
+ btrfs_item_nr(leaf, path->slots[0]));
+ found_end = key.offset + found_size;
+
+ if (found_end < offset + size) {
+ btrfs_release_path(root, path);
+ ret = btrfs_search_slot(trans, root, &key, path,
+ offset + size - found_end, 1);
+ BUG_ON(ret != 0);
+
+ ret = btrfs_extend_item(trans, root, path,
+ offset + size - found_end);
+ if (ret) {
+ err = ret;
+ goto fail;
+ }
+ leaf = path->nodes[0];
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+ inode->i_blocks += (offset + size - found_end) >> 9;
+ }
+ if (found_end < offset) {
+ ptr = btrfs_file_extent_inline_start(ei) + found_size;
+ memset_extent_buffer(leaf, 0, ptr, offset - found_end);
+ }
+ } else {
+insert:
+ btrfs_release_path(root, path);
+ datasize = offset + size - key.offset;
+ inode->i_blocks += datasize >> 9;
+ datasize = btrfs_file_extent_calc_inline_size(datasize);
+ ret = btrfs_insert_empty_item(trans, root, path, &key,
+ datasize);
+ if (ret) {
+ err = ret;
+ printk("got bad ret %d\n", ret);
+ goto fail;
+ }
+ leaf = path->nodes[0];
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+ btrfs_set_file_extent_generation(leaf, ei, trans->transid);
+ btrfs_set_file_extent_type(leaf, ei, BTRFS_FILE_EXTENT_INLINE);
+ }
+ ptr = btrfs_file_extent_inline_start(ei) + offset - key.offset;
+
+ cur_size = size;
+ i = 0;
+ while (size > 0) {
+ page = pages[i];
+ kaddr = kmap_atomic(page, KM_USER0);
+ cur_size = min_t(size_t, PAGE_CACHE_SIZE - page_offset, size);
+ write_extent_buffer(leaf, kaddr + page_offset, ptr, cur_size);
+ kunmap_atomic(kaddr, KM_USER0);
+ page_offset = 0;
+ ptr += cur_size;
+ size -= cur_size;
+ if (i >= num_pages) {
+ printk("i %d num_pages %d\n", i, num_pages);
+ }
+ i++;
+ }
+ btrfs_mark_buffer_dirty(leaf);