33 void incfs_free_bfc(struct backing_file_context *bfc)  in incfs_free_bfc()  argument
35 	if (!bfc)  in incfs_free_bfc()
38 	if (bfc->bc_file)  in incfs_free_bfc()
39 		fput(bfc->bc_file);  in incfs_free_bfc()
41 	mutex_destroy(&bfc->bc_mutex);  in incfs_free_bfc()
42 	kfree(bfc);  in incfs_free_bfc()
58 static int truncate_backing_file(struct backing_file_context *bfc,  in truncate_backing_file()  argument
67 	if (!bfc)  in truncate_backing_file()
70 	LOCK_REQUIRED(bfc->bc_mutex);  in truncate_backing_file()
72 	if (!bfc->bc_file)  in truncate_backing_file()
75 	old_end = incfs_get_end_offset(bfc->bc_file);  in truncate_backing_file()
81 	inode = bfc->bc_file->f_inode;  in truncate_backing_file()
82 	dentry = bfc->bc_file->f_path.dentry;  in truncate_backing_file()
94 static int write_to_bf(struct backing_file_context *bfc, const void *buf,  in write_to_bf()  argument
97 	ssize_t res = incfs_kwrite(bfc, buf, count, pos);  in write_to_bf()
106 static int append_zeros_no_fallocate(struct backing_file_context *bfc,  in append_zeros_no_fallocate()  argument
115 		int err = write_to_bf(bfc, buffer, to_write, file_size + i);  in append_zeros_no_fallocate()
125 static int append_zeros(struct backing_file_context *bfc, size_t len)  in append_zeros()  argument
131 	if (!bfc)  in append_zeros()
137 	LOCK_REQUIRED(bfc->bc_mutex);  in append_zeros()
144 	file_size = incfs_get_end_offset(bfc->bc_file);  in append_zeros()
146 	result = vfs_fallocate(bfc->bc_file, 0, new_last_byte_offset, 1);  in append_zeros()
150 	return append_zeros_no_fallocate(bfc, file_size, len);  in append_zeros()
157 static int append_md_to_backing_file(struct backing_file_context *bfc,  in append_md_to_backing_file()  argument
166 	if (!bfc || !record)  in append_md_to_backing_file()
169 	if (bfc->bc_last_md_record_offset < 0)  in append_md_to_backing_file()
172 	LOCK_REQUIRED(bfc->bc_mutex);  in append_md_to_backing_file()
175 	file_pos = incfs_get_end_offset(bfc->bc_file);  in append_md_to_backing_file()
181 	result = write_to_bf(bfc, record, record_size, file_pos);  in append_md_to_backing_file()
186 	if (bfc->bc_last_md_record_offset) {  in append_md_to_backing_file()
191 		file_pos = bfc->bc_last_md_record_offset +  in append_md_to_backing_file()
201 	result = write_to_bf(bfc, &new_md_offset, sizeof(new_md_offset),  in append_md_to_backing_file()
206 	bfc->bc_last_md_record_offset = record_offset;  in append_md_to_backing_file()
214 int incfs_write_blockmap_to_backing_file(struct backing_file_context *bfc,  in incfs_write_blockmap_to_backing_file()  argument
222 	if (!bfc)  in incfs_write_blockmap_to_backing_file()
230 	LOCK_REQUIRED(bfc->bc_mutex);  in incfs_write_blockmap_to_backing_file()
233 	file_end = incfs_get_end_offset(bfc->bc_file);  in incfs_write_blockmap_to_backing_file()
234 	result = append_zeros(bfc, map_size);  in incfs_write_blockmap_to_backing_file()
240 	result = append_md_to_backing_file(bfc, &blockmap.m_header);  in incfs_write_blockmap_to_backing_file()
243 		truncate_backing_file(bfc, file_end);  in incfs_write_blockmap_to_backing_file()
248 int incfs_write_signature_to_backing_file(struct backing_file_context *bfc,  in incfs_write_signature_to_backing_file()  argument
258 	if (!bfc)  in incfs_write_signature_to_backing_file()
261 	LOCK_REQUIRED(bfc->bc_mutex);  in incfs_write_signature_to_backing_file()
263 	rollback_pos = incfs_get_end_offset(bfc->bc_file);  in incfs_write_signature_to_backing_file()
272 		result = write_to_bf(bfc, sig.data, sig.len, rollback_pos);  in incfs_write_signature_to_backing_file()
277 	tree_area_pos = incfs_get_end_offset(bfc->bc_file);  in incfs_write_signature_to_backing_file()
294 		result = append_zeros(bfc, tree_size + alignment);  in incfs_write_signature_to_backing_file()
303 	result = append_md_to_backing_file(bfc, &sg.sg_header);  in incfs_write_signature_to_backing_file()
307 		truncate_backing_file(bfc, rollback_pos);  in incfs_write_signature_to_backing_file()
318 static int write_new_status_to_backing_file(struct backing_file_context *bfc,  in write_new_status_to_backing_file()  argument
333 	LOCK_REQUIRED(bfc->bc_mutex);  in write_new_status_to_backing_file()
334 	rollback_pos = incfs_get_end_offset(bfc->bc_file);  in write_new_status_to_backing_file()
335 	result = append_md_to_backing_file(bfc, &is.is_header);  in write_new_status_to_backing_file()
337 		truncate_backing_file(bfc, rollback_pos);  in write_new_status_to_backing_file()
342 int incfs_write_status_to_backing_file(struct backing_file_context *bfc,  in incfs_write_status_to_backing_file()  argument
350 	if (!bfc)  in incfs_write_status_to_backing_file()
354 		return write_new_status_to_backing_file(bfc,  in incfs_write_status_to_backing_file()
357 	result = incfs_kread(bfc, &is, sizeof(is), status_offset);  in incfs_write_status_to_backing_file()
363 	result = incfs_kwrite(bfc, &is, sizeof(is), status_offset);  in incfs_write_status_to_backing_file()
371 		struct backing_file_context *bfc, struct mem_range signature,  in incfs_write_verity_signature_to_backing_file()  argument
382 	pos = incfs_get_end_offset(bfc->bc_file);  in incfs_write_verity_signature_to_backing_file()
394 	result = write_to_bf(bfc, signature.data, signature.len, pos);  in incfs_write_verity_signature_to_backing_file()
398 	result = append_md_to_backing_file(bfc, &vs.vs_header);  in incfs_write_verity_signature_to_backing_file()
406 		truncate_backing_file(bfc, pos);  in incfs_write_verity_signature_to_backing_file()
416 int incfs_write_fh_to_backing_file(struct backing_file_context *bfc,  in incfs_write_fh_to_backing_file()  argument
422 	if (!bfc)  in incfs_write_fh_to_backing_file()
434 	LOCK_REQUIRED(bfc->bc_mutex);  in incfs_write_fh_to_backing_file()
436 	file_pos = incfs_get_end_offset(bfc->bc_file);  in incfs_write_fh_to_backing_file()
440 	return write_to_bf(bfc, &fh, sizeof(fh), file_pos);  in incfs_write_fh_to_backing_file()
447 int incfs_write_mapping_fh_to_backing_file(struct backing_file_context *bfc,  in incfs_write_mapping_fh_to_backing_file()  argument
453 	if (!bfc)  in incfs_write_mapping_fh_to_backing_file()
466 	LOCK_REQUIRED(bfc->bc_mutex);  in incfs_write_mapping_fh_to_backing_file()
468 	file_pos = incfs_get_end_offset(bfc->bc_file);  in incfs_write_mapping_fh_to_backing_file()
472 	return write_to_bf(bfc, &fh, sizeof(fh), file_pos);  in incfs_write_mapping_fh_to_backing_file()
476 int incfs_write_data_block_to_backing_file(struct backing_file_context *bfc,  in incfs_write_data_block_to_backing_file()  argument
486 	if (!bfc)  in incfs_write_data_block_to_backing_file()
492 	LOCK_REQUIRED(bfc->bc_mutex);  in incfs_write_data_block_to_backing_file()
494 	data_offset = incfs_get_end_offset(bfc->bc_file);  in incfs_write_data_block_to_backing_file()
501 	result = write_to_bf(bfc, block.data, block.len, data_offset);  in incfs_write_data_block_to_backing_file()
511 	return write_to_bf(bfc, &bm_entry, sizeof(bm_entry),  in incfs_write_data_block_to_backing_file()
515 int incfs_write_hash_block_to_backing_file(struct backing_file_context *bfc,  in incfs_write_hash_block_to_backing_file()  argument
531 	if (!bfc)  in incfs_write_hash_block_to_backing_file()
534 	LOCK_REQUIRED(bfc->bc_mutex);  in incfs_write_hash_block_to_backing_file()
537 	file_end = incfs_get_end_offset(bfc->bc_file);  in incfs_write_hash_block_to_backing_file()
543 	result = write_to_bf(bfc, block.data, block.len, data_offset);  in incfs_write_hash_block_to_backing_file()
551 	return write_to_bf(bfc, &bm_entry, sizeof(bm_entry), bm_entry_off);  in incfs_write_hash_block_to_backing_file()
554 int incfs_read_blockmap_entry(struct backing_file_context *bfc, int block_index,  in incfs_read_blockmap_entry()  argument
558 	int error = incfs_read_blockmap_entries(bfc, bm_entry, block_index, 1,  in incfs_read_blockmap_entry()
573 int incfs_read_blockmap_entries(struct backing_file_context *bfc,  in incfs_read_blockmap_entries()  argument
584 	if (!bfc || !entries)  in incfs_read_blockmap_entries()
590 	result = incfs_kread(bfc, entries, bytes_to_read, bm_entry_off);  in incfs_read_blockmap_entries()
596 int incfs_read_file_header(struct backing_file_context *bfc,  in incfs_read_file_header()  argument
603 	if (!bfc || !first_md_off)  in incfs_read_file_header()
606 	bytes_read = incfs_kread(bfc, &fh, sizeof(fh), 0);  in incfs_read_file_header()
640 int incfs_read_next_metadata_record(struct backing_file_context *bfc,  in incfs_read_next_metadata_record()  argument
650 	if (!bfc || !handler)  in incfs_read_next_metadata_record()
657 	bytes_read = incfs_kread(bfc, &handler->md_buffer, max_md_size,  in incfs_read_next_metadata_record()
725 			bfc->bc_last_md_record_offset =  in incfs_read_next_metadata_record()
734 ssize_t incfs_kread(struct backing_file_context *bfc, void *buf, size_t size,  in incfs_kread()  argument
737 	const struct cred *old_cred = override_creds(bfc->bc_cred);  in incfs_kread()
738 	int ret = kernel_read(bfc->bc_file, buf, size, &pos);  in incfs_kread()
744 ssize_t incfs_kwrite(struct backing_file_context *bfc, const void *buf,  in incfs_kwrite()  argument
747 	const struct cred *old_cred = override_creds(bfc->bc_cred);  in incfs_kwrite()
748 	int ret = kernel_write(bfc->bc_file, buf, size, &pos);  in incfs_kwrite()