fs/erofs/fscache.c

385 static void erofs_fscache_domain_put(struct erofs_domain *domain)
388 	if (refcount_dec_and_test(&domain->ref)) {
389 		list_del(&domain->list);
394 		fscache_relinquish_volume(domain->volume, NULL, false);
396 		kfree(domain->domain_id);
397 		kfree(domain);
431 	struct erofs_domain *domain;
434 	domain = kzalloc(sizeof(struct erofs_domain), GFP_KERNEL);
435 	if (!domain)
438 	domain->domain_id = kstrdup(sbi->domain_id, GFP_KERNEL);
439 	if (!domain->domain_id) {
440 		kfree(domain);
457 	domain->volume = sbi->volume;
458 	refcount_set(&domain->ref, 1);
459 	list_add(&domain->list, &erofs_domain_list);
460 	sbi->domain = domain;
463 	kfree(domain->domain_id);
464 	kfree(domain);
471 	struct erofs_domain *domain;
475 	list_for_each_entry(domain, &erofs_domain_list, list) {
476 		if (!strcmp(domain->domain_id, sbi->domain_id)) {
477 			sbi->domain = domain;
478 			sbi->volume = domain->volume;
479 			refcount_inc(&domain->ref);
557 	struct erofs_domain *domain = EROFS_SB(sb)->domain;
569 	refcount_inc(&domain->ref);
570 	ctx->domain = domain;
579 	struct erofs_domain *domain = EROFS_SB(sb)->domain;
584 		if (ctx->domain != domain || strcmp(ctx->name, name))
589 			erofs_err(sb, "%s already exists in domain %s", name,
590 				  domain->domain_id);
612 	struct erofs_domain *domain = NULL;
616 	if (!ctx->domain)
621 		domain = ctx->domain;
626 	if (domain)
627 		erofs_fscache_domain_put(domain);
645 	 * When shared domain is enabled, using NEED_NOEXIST to guarantee
646 	 * the primary data blob (aka fsid) is unique in the shared domain.
648 	 * For non-shared-domain case, fscache_acquire_volume() invoked by
652 	 * Acquired domain/volume will be relinquished in kill_sb() on error.
670 	if (sbi->domain)
671 		erofs_fscache_domain_put(sbi->domain);
677 	sbi->domain = NULL;