1// SPDX-License-Identifier: GPL-2.0
2#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_ADD
151#undef FDA_CHECK
152
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