}
return false;
}
+
+struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
+ struct qstr *name, struct page **res_page)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
+ struct page *ipage;
+ struct f2fs_dir_entry *de;
+ f2fs_hash_t namehash;
+ unsigned long bit_pos = 0;
+ struct f2fs_inline_dentry *dentry_blk;
+ const void *dentry_bits;
+
+ ipage = get_node_page(sbi, dir->i_ino);
+ if (IS_ERR(ipage))
+ return NULL;
+
+ namehash = f2fs_dentry_hash(name);
+
+ dentry_blk = inline_data_addr(ipage);
+ dentry_bits = &dentry_blk->dentry_bitmap;
+
+ while (bit_pos < NR_INLINE_DENTRY) {
+ if (!test_bit_le(bit_pos, dentry_bits)) {
+ bit_pos++;
+ continue;
+ }
+ de = &dentry_blk->dentry[bit_pos];
+ if (early_match_name(name->len, namehash, de)) {
+ if (!memcmp(dentry_blk->filename[bit_pos],
+ name->name,
+ name->len)) {
+ *res_page = ipage;
+ goto found;
+ }
+ }
+
+ /*
+ * For the most part, it should be a bug when name_len is zero.
+ * We stop here for figuring out where the bugs are occurred.
+ */
+ f2fs_bug_on(F2FS_P_SB(ipage), !de->name_len);
+
+ bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
+ }
+
+ de = NULL;
+found:
+ unlock_page(ipage);
+ return de;
+}
+
+struct f2fs_dir_entry *f2fs_parent_inline_dir(struct inode *dir,
+ struct page **p)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+ struct page *ipage;
+ struct f2fs_dir_entry *de;
+ struct f2fs_inline_dentry *dentry_blk;
+
+ ipage = get_node_page(sbi, dir->i_ino);
+ if (IS_ERR(ipage))
+ return NULL;
+
+ dentry_blk = inline_data_addr(ipage);
+ de = &dentry_blk->dentry[1];
+ *p = ipage;
+ unlock_page(ipage);
+ return de;
+}
+
+int make_empty_inline_dir(struct inode *inode, struct inode *parent,
+ struct page *ipage)
+{
+ struct f2fs_inline_dentry *dentry_blk;
+ struct f2fs_dir_entry *de;
+
+ dentry_blk = inline_data_addr(ipage);
+
+ de = &dentry_blk->dentry[0];
+ de->name_len = cpu_to_le16(1);
+ de->hash_code = 0;
+ de->ino = cpu_to_le32(inode->i_ino);
+ memcpy(dentry_blk->filename[0], ".", 1);
+ set_de_type(de, inode);
+
+ de = &dentry_blk->dentry[1];
+ de->hash_code = 0;
+ de->name_len = cpu_to_le16(2);
+ de->ino = cpu_to_le32(parent->i_ino);
+ memcpy(dentry_blk->filename[1], "..", 2);
+ set_de_type(de, inode);
+
+ test_and_set_bit_le(0, &dentry_blk->dentry_bitmap);
+ test_and_set_bit_le(1, &dentry_blk->dentry_bitmap);
+
+ set_page_dirty(ipage);
+
+ /* update i_size to MAX_INLINE_DATA */
+ if (i_size_read(inode) < MAX_INLINE_DATA) {
+ i_size_write(inode, MAX_INLINE_DATA);
+ set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR);
+ }
+ return 0;
+}
+
+int room_in_inline_dir(struct f2fs_inline_dentry *dentry_blk, int slots)
+{
+ int bit_start = 0;
+ int zero_start, zero_end;
+next:
+ zero_start = find_next_zero_bit_le(&dentry_blk->dentry_bitmap,
+ NR_INLINE_DENTRY,
+ bit_start);
+ if (zero_start >= NR_INLINE_DENTRY)
+ return NR_INLINE_DENTRY;
+
+ zero_end = find_next_bit_le(&dentry_blk->dentry_bitmap,
+ NR_INLINE_DENTRY,
+ zero_start);
+ if (zero_end - zero_start >= slots)
+ return zero_start;
+
+ bit_start = zero_end + 1;
+
+ if (zero_end + 1 >= NR_INLINE_DENTRY)
+ return NR_INLINE_DENTRY;
+ goto next;
+}
+
+int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
+ struct f2fs_inline_dentry *inline_dentry)
+{
+ struct page *page;
+ struct dnode_of_data dn;
+ struct f2fs_dentry_block *dentry_blk;
+ int err;
+
+ page = grab_cache_page(dir->i_mapping, 0);
+ if (!page)
+ return -ENOMEM;
+
+ set_new_dnode(&dn, dir, ipage, NULL, 0);
+ err = f2fs_reserve_block(&dn, 0);
+ if (err)
+ goto out;
+
+ f2fs_wait_on_page_writeback(page, DATA);
+ zero_user_segment(page, 0, PAGE_CACHE_SIZE);
+
+ dentry_blk = kmap(page);
+
+ /* copy data from inline dentry block to new dentry block */
+ memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
+ INLINE_DENTRY_BITMAP_SIZE);
+ memcpy(dentry_blk->dentry, inline_dentry->dentry,
+ sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
+ memcpy(dentry_blk->filename, inline_dentry->filename,
+ NR_INLINE_DENTRY * F2FS_SLOT_LEN);
+
+ kunmap(page);
+ SetPageUptodate(page);
+ set_page_dirty(page);
+
+ /* clear inline dir and flag after data writeback */
+ zero_user_segment(ipage, INLINE_DATA_OFFSET,
+ INLINE_DATA_OFFSET + MAX_INLINE_DATA);
+
+ stat_dec_inline_inode(dir);
+
+ if (i_size_read(dir) < PAGE_CACHE_SIZE) {
+ i_size_write(dir, PAGE_CACHE_SIZE);
+ set_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
+ }
+
+ sync_inode_page(&dn);
+out:
+ f2fs_put_page(page, 1);
+ return err;
+}
+
+int f2fs_add_inline_entry(struct inode *dir, const struct qstr *name,
+ struct inode *inode)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+ struct page *ipage;
+ unsigned int bit_pos;
+ f2fs_hash_t name_hash;
+ struct f2fs_dir_entry *de;
+ size_t namelen = name->len;
+ struct f2fs_inline_dentry *dentry_blk = NULL;
+ int slots = GET_DENTRY_SLOTS(namelen);
+ struct page *page;
+ int err = 0;
+ int i;
+
+ name_hash = f2fs_dentry_hash(name);
+
+ ipage = get_node_page(sbi, dir->i_ino);
+ if (IS_ERR(ipage))
+ return PTR_ERR(ipage);
+
+ dentry_blk = inline_data_addr(ipage);
+ bit_pos = room_in_inline_dir(dentry_blk, slots);
+ if (bit_pos >= NR_INLINE_DENTRY) {
+ err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
+ if (!err)
+ err = -EAGAIN;
+ goto out;
+ }
+
+ f2fs_wait_on_page_writeback(ipage, DATA);
+
+ down_write(&F2FS_I(inode)->i_sem);
+ page = init_inode_metadata(inode, dir, name);
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ goto fail;
+ }
+ de = &dentry_blk->dentry[bit_pos];
+ de->hash_code = name_hash;
+ de->name_len = cpu_to_le16(namelen);
+ memcpy(dentry_blk->filename[bit_pos], name->name, name->len);
+ de->ino = cpu_to_le32(inode->i_ino);
+ set_de_type(de, inode);
+ for (i = 0; i < slots; i++)
+ test_and_set_bit_le(bit_pos + i, &dentry_blk->dentry_bitmap);
+ set_page_dirty(ipage);
+
+ /* we don't need to mark_inode_dirty now */
+ F2FS_I(inode)->i_pino = dir->i_ino;
+ update_inode(inode, page);
+ f2fs_put_page(page, 1);
+
+ update_parent_metadata(dir, inode, 0);
+fail:
+ up_write(&F2FS_I(inode)->i_sem);
+
+ if (is_inode_flag_set(F2FS_I(dir), FI_UPDATE_DIR)) {
+ update_inode(dir, ipage);
+ clear_inode_flag(F2FS_I(dir), FI_UPDATE_DIR);
+ }
+out:
+ f2fs_put_page(ipage, 1);
+ return err;
+}
+
+void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
+ struct inode *dir, struct inode *inode)
+{
+ struct f2fs_inline_dentry *inline_dentry;
+ int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
+ unsigned int bit_pos;
+ int i;
+
+ lock_page(page);
+ f2fs_wait_on_page_writeback(page, DATA);
+
+ inline_dentry = inline_data_addr(page);
+ bit_pos = dentry - inline_dentry->dentry;
+ for (i = 0; i < slots; i++)
+ test_and_clear_bit_le(bit_pos + i,
+ &inline_dentry->dentry_bitmap);
+
+ set_page_dirty(page);
+
+ dir->i_ctime = dir->i_mtime = CURRENT_TIME;
+
+ if (inode)
+ f2fs_drop_nlink(dir, inode, page);
+
+ f2fs_put_page(page, 1);
+}
+
+bool f2fs_empty_inline_dir(struct inode *dir)
+{
+ struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+ struct page *ipage;
+ unsigned int bit_pos = 2;
+ struct f2fs_inline_dentry *dentry_blk;
+
+ ipage = get_node_page(sbi, dir->i_ino);
+ if (IS_ERR(ipage))
+ return false;
+
+ dentry_blk = inline_data_addr(ipage);
+ bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
+ NR_INLINE_DENTRY,
+ bit_pos);
+
+ f2fs_put_page(ipage, 1);
+
+ if (bit_pos < NR_INLINE_DENTRY)
+ return false;
+
+ return true;
+}
+
+int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx)
+{
+ struct inode *inode = file_inode(file);
+ struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+ unsigned int bit_pos = 0;
+ struct f2fs_inline_dentry *inline_dentry = NULL;
+ struct f2fs_dir_entry *de = NULL;
+ struct page *ipage = NULL;
+ unsigned char d_type = DT_UNKNOWN;
+
+ if (ctx->pos == NR_INLINE_DENTRY)
+ return 0;
+
+ ipage = get_node_page(sbi, inode->i_ino);
+ if (IS_ERR(ipage))
+ return PTR_ERR(ipage);
+
+ bit_pos = ((unsigned long)ctx->pos % NR_INLINE_DENTRY);
+
+ inline_dentry = inline_data_addr(ipage);
+ while (bit_pos < NR_INLINE_DENTRY) {
+ bit_pos = find_next_bit_le(&inline_dentry->dentry_bitmap,
+ NR_INLINE_DENTRY,
+ bit_pos);
+ if (bit_pos >= NR_INLINE_DENTRY)
+ break;
+
+ de = &inline_dentry->dentry[bit_pos];
+ if (de->file_type < F2FS_FT_MAX)
+ d_type = f2fs_filetype_table[de->file_type];
+ else
+ d_type = DT_UNKNOWN;
+
+ if (!dir_emit(ctx,
+ inline_dentry->filename[bit_pos],
+ le16_to_cpu(de->name_len),
+ le32_to_cpu(de->ino), d_type))
+ goto out;
+
+ bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
+ ctx->pos = bit_pos;
+ }
+
+ ctx->pos = NR_INLINE_DENTRY;
+out:
+ f2fs_put_page(ipage, 1);
+
+ return 0;
+}
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff