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// 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;
}
fdarray__init_revents(fda, POLLHUP);
fda->priv[2].flags = fdarray_flag__nonfilterable;
pr_debug("\nfiltering all but fda->entries[2] (nonfilterable):");
fdarray__fprintf_prefix(fda, "before", stderr);
/*
* Note: fdarray__filter() in tools/lib/api/fd/array.c evaluates the
* fdarray_flag__nonfilterable flag at the very top of its loop via an
* early continue. Therefore, it completely skips all processing for this
* descriptor, guaranteeing its fd, events, and revents fields remain
* entirely untouched by the filter mask evaluation below it.
*/
nr_fds = fdarray__filter(fda, POLLHUP, NULL, NULL);
fdarray__fprintf_prefix(fda, " after", stderr);
if (nr_fds != 0) {
pr_debug("\nfdarray__filter()=%d != 0, should be 0\n",
nr_fds);
goto out_delete;
}
if (fda->entries[2].fd == -1) {
pr_debug("\nfdarray__filter() illegally modified nonfilterable fd!");
goto out_delete;
}
if (fda->entries[2].revents != POLLHUP) {
pr_debug("\nfdarray__filter() illegally modified nonfilterable revents!");
goto out_delete;
}
fda->priv[2].flags = 0; /* reset flags */
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);
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