// SPDX-License-Identifier: GPL-2.0#include <api/fd/array.h>#include <poll.h>#include "util/debug.h"#include "tests/tests.h" static void fdarray__init_revents(struct fdarray *fda, short revents){	int fd; 	fda->nr = fda->nr_alloc; 	for (fd = 0; fd < fda->nr; ++fd) {		fda->entries[fd].fd	 = fda->nr - fd;		fda->entries[fd].events  = revents;		fda->entries[fd].revents = revents;	}} static int fdarray__fprintf_prefix(struct fdarray *fda, const char *prefix, FILE *fp){	int printed = 0; 	if (verbose <= 0)		return 0; 	printed += fprintf(fp, "\n%s: ", prefix);	return printed + fdarray__fprintf(fda, fp);} static int test__fdarray__filter(struct test_suite *test __maybe_unused, int subtest __maybe_unused){	int nr_fds, err = TEST_FAIL;	struct fdarray *fda = fdarray__new(5, 5); 	if (fda == NULL) {		pr_debug("\nfdarray__new() failed!");		goto out;	} 	fdarray__init_revents(fda, POLLIN);	nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL);	if (nr_fds != fda->nr_alloc) {		pr_debug("\nfdarray__filter()=%d != %d shouldn't have filtered anything",			 nr_fds, fda->nr_alloc);		goto out_delete;	} 	fdarray__init_revents(fda, POLLHUP);	nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL);	if (nr_fds != 0) {		pr_debug("\nfdarray__filter()=%d != %d, should have filtered all fds",			 nr_fds, fda->nr_alloc);		goto out_delete;	} 	fdarray__init_revents(fda, POLLHUP);	fda->entries[2].revents = POLLIN; 	pr_debug("\nfiltering all but fda->entries[2]:");	fdarray__fprintf_prefix(fda, "before", stderr);	nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL);	fdarray__fprintf_prefix(fda, " after", stderr);	if (nr_fds != 1) {		pr_debug("\nfdarray__filter()=%d != 1, should have left just one event", nr_fds);		goto out_delete;	} 	fdarray__init_revents(fda, POLLHUP);	fda->entries[0].revents = POLLIN;	fda->entries[3].revents = POLLIN; 	pr_debug("\nfiltering all but (fda->entries[0], fda->entries[3]):");	fdarray__fprintf_prefix(fda, "before", stderr);	nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL);	fdarray__fprintf_prefix(fda, " after", stderr);	if (nr_fds != 2) {		pr_debug("\nfdarray__filter()=%d != 2, should have left just two events",			 nr_fds);		goto out_delete;	} 	pr_debug("\n"); 	err = 0;out_delete:	fdarray__delete(fda);out:	return err;} static int test__fdarray__add(struct test_suite *test __maybe_unused, int subtest __maybe_unused){	int err = TEST_FAIL;	struct fdarray *fda = fdarray__new(2, 2); 	if (fda == NULL) {		pr_debug("\nfdarray__new() failed!");		goto out;	} #define FDA_CHECK(_idx, _fd, _revents)					   \	if (fda->entries[_idx].fd != _fd) {				   \		pr_debug("\n%d: fda->entries[%d](%d) != %d!",		   \			 __LINE__, _idx, fda->entries[1].fd, _fd);	   \		goto out_delete;					   \	}								   \	if (fda->entries[_idx].events != (_revents)) {			   \		pr_debug("\n%d: fda->entries[%d].revents(%d) != %d!",	   \			 __LINE__, _idx, fda->entries[_idx].fd, _revents); \		goto out_delete;					   \	} #define FDA_ADD(_idx, _fd, _revents, _nr)				   \	if (fdarray__add(fda, _fd, _revents, fdarray_flag__default) < 0) { \		pr_debug("\n%d: fdarray__add(fda, %d, %d) failed!",	   \			 __LINE__,_fd, _revents);			   \		goto out_delete;					   \	}								   \	if (fda->nr != _nr) {						   \		pr_debug("\n%d: fdarray__add(fda, %d, %d)=%d != %d",	   \			 __LINE__,_fd, _revents, fda->nr, _nr);		   \		goto out_delete;					   \	}								   \	FDA_CHECK(_idx, _fd, _revents) 	FDA_ADD(0, 1, POLLIN, 1);	FDA_ADD(1, 2, POLLERR, 2); 	fdarray__fprintf_prefix(fda, "before growing array", stderr); 	FDA_ADD(2, 35, POLLHUP, 3); 	if (fda->entries == NULL) {		pr_debug("\nfdarray__add(fda, 35, POLLHUP) should have allocated fda->pollfd!");		goto out_delete;	} 	fdarray__fprintf_prefix(fda, "after 3rd add", stderr); 	FDA_ADD(3, 88, POLLIN | POLLOUT, 4); 	fdarray__fprintf_prefix(fda, "after 4th add", stderr); 	FDA_CHECK(0, 1, POLLIN);	FDA_CHECK(1, 2, POLLERR);	FDA_CHECK(2, 35, POLLHUP);	FDA_CHECK(3, 88, POLLIN | POLLOUT); #undef FDA_ADD#undef FDA_CHECK 	pr_debug("\n"); 	err = 0;out_delete:	fdarray__delete(fda);out:	return err;} DEFINE_SUITE("Filter fds with revents mask in a fdarray", fdarray__filter);DEFINE_SUITE("Add fd to a fdarray, making it autogrow", fdarray__add);