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brintos / linux-shallow public Read only

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1// SPDX-License-Identifier: GPL-2.02#include <api/fd/array.h>3#include <poll.h>4#include "util/debug.h"5#include "tests/tests.h"6 7static void fdarray__init_revents(struct fdarray *fda, short revents)8{9	int fd;10 11	fda->nr = fda->nr_alloc;12 13	for (fd = 0; fd < fda->nr; ++fd) {14		fda->entries[fd].fd	 = fda->nr - fd;15		fda->entries[fd].events  = revents;16		fda->entries[fd].revents = revents;17	}18}19 20static int fdarray__fprintf_prefix(struct fdarray *fda, const char *prefix, FILE *fp)21{22	int printed = 0;23 24	if (verbose <= 0)25		return 0;26 27	printed += fprintf(fp, "\n%s: ", prefix);28	return printed + fdarray__fprintf(fda, fp);29}30 31static int test__fdarray__filter(struct test_suite *test __maybe_unused, int subtest __maybe_unused)32{33	int nr_fds, err = TEST_FAIL;34	struct fdarray *fda = fdarray__new(5, 5);35 36	if (fda == NULL) {37		pr_debug("\nfdarray__new() failed!");38		goto out;39	}40 41	fdarray__init_revents(fda, POLLIN);42	nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL);43	if (nr_fds != fda->nr_alloc) {44		pr_debug("\nfdarray__filter()=%d != %d shouldn't have filtered anything",45			 nr_fds, fda->nr_alloc);46		goto out_delete;47	}48 49	fdarray__init_revents(fda, POLLHUP);50	nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL);51	if (nr_fds != 0) {52		pr_debug("\nfdarray__filter()=%d != %d, should have filtered all fds",53			 nr_fds, fda->nr_alloc);54		goto out_delete;55	}56 57	fdarray__init_revents(fda, POLLHUP);58	fda->entries[2].revents = POLLIN;59 60	pr_debug("\nfiltering all but fda->entries[2]:");61	fdarray__fprintf_prefix(fda, "before", stderr);62	nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL);63	fdarray__fprintf_prefix(fda, " after", stderr);64	if (nr_fds != 1) {65		pr_debug("\nfdarray__filter()=%d != 1, should have left just one event", nr_fds);66		goto out_delete;67	}68 69	fdarray__init_revents(fda, POLLHUP);70	fda->entries[0].revents = POLLIN;71	fda->entries[3].revents = POLLIN;72 73	pr_debug("\nfiltering all but (fda->entries[0], fda->entries[3]):");74	fdarray__fprintf_prefix(fda, "before", stderr);75	nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL);76	fdarray__fprintf_prefix(fda, " after", stderr);77	if (nr_fds != 2) {78		pr_debug("\nfdarray__filter()=%d != 2, should have left just two events",79			 nr_fds);80		goto out_delete;81	}82 83	pr_debug("\n");84 85	err = 0;86out_delete:87	fdarray__delete(fda);88out:89	return err;90}91 92static int test__fdarray__add(struct test_suite *test __maybe_unused, int subtest __maybe_unused)93{94	int err = TEST_FAIL;95	struct fdarray *fda = fdarray__new(2, 2);96 97	if (fda == NULL) {98		pr_debug("\nfdarray__new() failed!");99		goto out;100	}101 102#define FDA_CHECK(_idx, _fd, _revents)					   \103	if (fda->entries[_idx].fd != _fd) {				   \104		pr_debug("\n%d: fda->entries[%d](%d) != %d!",		   \105			 __LINE__, _idx, fda->entries[1].fd, _fd);	   \106		goto out_delete;					   \107	}								   \108	if (fda->entries[_idx].events != (_revents)) {			   \109		pr_debug("\n%d: fda->entries[%d].revents(%d) != %d!",	   \110			 __LINE__, _idx, fda->entries[_idx].fd, _revents); \111		goto out_delete;					   \112	}113 114#define FDA_ADD(_idx, _fd, _revents, _nr)				   \115	if (fdarray__add(fda, _fd, _revents, fdarray_flag__default) < 0) { \116		pr_debug("\n%d: fdarray__add(fda, %d, %d) failed!",	   \117			 __LINE__,_fd, _revents);			   \118		goto out_delete;					   \119	}								   \120	if (fda->nr != _nr) {						   \121		pr_debug("\n%d: fdarray__add(fda, %d, %d)=%d != %d",	   \122			 __LINE__,_fd, _revents, fda->nr, _nr);		   \123		goto out_delete;					   \124	}								   \125	FDA_CHECK(_idx, _fd, _revents)126 127	FDA_ADD(0, 1, POLLIN, 1);128	FDA_ADD(1, 2, POLLERR, 2);129 130	fdarray__fprintf_prefix(fda, "before growing array", stderr);131 132	FDA_ADD(2, 35, POLLHUP, 3);133 134	if (fda->entries == NULL) {135		pr_debug("\nfdarray__add(fda, 35, POLLHUP) should have allocated fda->pollfd!");136		goto out_delete;137	}138 139	fdarray__fprintf_prefix(fda, "after 3rd add", stderr);140 141	FDA_ADD(3, 88, POLLIN | POLLOUT, 4);142 143	fdarray__fprintf_prefix(fda, "after 4th add", stderr);144 145	FDA_CHECK(0, 1, POLLIN);146	FDA_CHECK(1, 2, POLLERR);147	FDA_CHECK(2, 35, POLLHUP);148	FDA_CHECK(3, 88, POLLIN | POLLOUT);149 150#undef FDA_ADD151#undef FDA_CHECK152 153	pr_debug("\n");154 155	err = 0;156out_delete:157	fdarray__delete(fda);158out:159	return err;160}161 162DEFINE_SUITE("Filter fds with revents mask in a fdarray", fdarray__filter);163DEFINE_SUITE("Add fd to a fdarray, making it autogrow", fdarray__add);164