1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2021 CTERA Networks. All Rights Reserved.
4 *
5 * Started by Amir Goldstein <[email protected]>
6 */
7
8 /*\
9 * [Description]
10 *
11 * Check that dnotify DN_RENAME event is reported only on rename inside same parent.
12 */
13
14 #include <fcntl.h>
15 #include <signal.h>
16 #include <stdio.h>
17 #include <unistd.h>
18 #include "tst_test.h"
19 #include "lapi/fcntl.h"
20
21 #define TEST_DIR "test_dir"
22 #define TEST_DIR2 "test_dir2"
23 #define TEST_FILE "test_file"
24
25 #define TEST_SIG (SIGRTMIN+1)
26
27 static int parent_fd, subdir_fd;
28 static int got_parent_event, got_subdir_event;
29
dnotify_handler(int sig,siginfo_t * si,void * data LTP_ATTRIBUTE_UNUSED)30 static void dnotify_handler(int sig, siginfo_t *si, void *data LTP_ATTRIBUTE_UNUSED)
31 {
32 if (si->si_fd == parent_fd)
33 got_parent_event = 1;
34 else if (si->si_fd == subdir_fd)
35 got_subdir_event = 1;
36 else
37 tst_brk(TBROK, "Got unexpected signal %d with si_fd %d", sig, si->si_fd);
38 }
39
setup_dnotify(int fd)40 static void setup_dnotify(int fd)
41 {
42 struct sigaction act;
43
44 act.sa_sigaction = dnotify_handler;
45 sigemptyset(&act.sa_mask);
46 act.sa_flags = SA_SIGINFO;
47 sigaction(TEST_SIG, &act, NULL);
48
49 TEST(fcntl(fd, F_SETSIG, TEST_SIG));
50 if (TST_RET != 0) {
51 tst_brk(TBROK, "F_SETSIG failed errno = %d : %s",
52 TST_ERR, strerror(TST_ERR));
53 }
54
55 TEST(fcntl(fd, F_NOTIFY, DN_RENAME|DN_MULTISHOT));
56 if (TST_RET != 0) {
57 tst_brk(TBROK, "F_NOTIFY failed errno = %d : %s",
58 TST_ERR, strerror(TST_ERR));
59 }
60 }
61
verify_dnotify(void)62 static void verify_dnotify(void)
63 {
64 parent_fd = SAFE_OPEN(".", O_RDONLY);
65 subdir_fd = SAFE_OPEN(TEST_DIR, O_RDONLY);
66
67 /* Watch renames inside ".", but not in and out of "." */
68 setup_dnotify(parent_fd);
69
70 /* Also watch for renames inside subdir, but not in and out of subdir */
71 setup_dnotify(subdir_fd);
72
73 /* Rename file from "." to subdir should not generate DN_RENAME on either */
74 tst_res(TINFO, "Testing no DN_RENAME on rename from parent to subdir");
75 SAFE_RENAME(TEST_FILE, TEST_DIR "/" TEST_FILE);
76
77 if (got_parent_event)
78 tst_res(TFAIL, "Got unexpected event on parent");
79 else
80 tst_res(TPASS, "No event on parent as expected");
81
82 if (got_subdir_event)
83 tst_res(TFAIL, "Got unexpected event on subdir");
84 else
85 tst_res(TPASS, "No event on subdir as expected");
86
87 /* Rename subdir itself should generate DN_RENAME on ".", but not on itself */
88 tst_res(TINFO, "Testing DN_RENAME on rename of subdir itself");
89 SAFE_RENAME(TEST_DIR, TEST_DIR2);
90
91 if (got_parent_event)
92 tst_res(TPASS, "Got event on parent as expected");
93 else
94 tst_res(TFAIL, "Missing event on parent");
95
96 if (got_subdir_event)
97 tst_res(TFAIL, "Got unexpected event on subdir");
98 else
99 tst_res(TPASS, "No event on subdir as expected");
100
101 SAFE_CLOSE(parent_fd);
102 SAFE_CLOSE(subdir_fd);
103
104 /* Cleanup before rerun */
105 SAFE_RENAME(TEST_DIR2 "/" TEST_FILE, TEST_FILE);
106 SAFE_RENAME(TEST_DIR2, TEST_DIR);
107 got_parent_event = 0;
108 got_subdir_event = 0;
109 }
110
setup(void)111 static void setup(void)
112 {
113 SAFE_MKDIR(TEST_DIR, 00700);
114 SAFE_TOUCH(TEST_FILE, 0666, NULL);
115 }
116
cleanup(void)117 static void cleanup(void)
118 {
119 if (parent_fd > 0)
120 SAFE_CLOSE(parent_fd);
121
122 if (subdir_fd > 0)
123 SAFE_CLOSE(subdir_fd);
124 }
125
126 static struct tst_test test = {
127 .needs_tmpdir = 1,
128 .setup = setup,
129 .cleanup = cleanup,
130 .test_all = verify_dnotify,
131 .needs_kconfigs = (const char *[]) { "CONFIG_DNOTIFY=y", NULL },
132 };
133