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selftests/landlock: Add supports_filesystem() helper
Replace supports_overlayfs() with supports_filesystem() to be able to check several filesystems. This will be useful in a following commit. Only check for overlay filesystem once in the setup step, and then rely on self->skip_test. Cc: Guenter Roeck <groeck@chromium.org> Cc: Jeff Xu <jeffxu@google.com> Link: https://lore.kernel.org/r/20230612191430.339153-4-mic@digikod.net Signed-off-by: Mickaël Salaün <mic@digikod.net>
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592efeb4a0
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1 changed files with 23 additions and 13 deletions
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@ -107,8 +107,10 @@ static bool fgrep(FILE *const inf, const char *const str)
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return false;
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}
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static bool supports_overlayfs(void)
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static bool supports_filesystem(const char *const filesystem)
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{
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char str[32];
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int len;
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bool res;
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FILE *const inf = fopen("/proc/filesystems", "r");
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@ -119,7 +121,12 @@ static bool supports_overlayfs(void)
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if (!inf)
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return true;
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res = fgrep(inf, "nodev\toverlay\n");
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len = snprintf(str, sizeof(str), "nodev\t%s\n", filesystem);
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if (len >= sizeof(str))
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/* Ignores too-long filesystem names. */
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return true;
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res = fgrep(inf, str);
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fclose(inf);
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return res;
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}
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@ -4044,14 +4051,17 @@ static const char (*merge_sub_files[])[] = {
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* └── work
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*/
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/* clang-format off */
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FIXTURE(layout2_overlay) {};
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/* clang-format on */
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FIXTURE(layout2_overlay)
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{
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bool skip_test;
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};
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FIXTURE_SETUP(layout2_overlay)
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{
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if (!supports_overlayfs())
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SKIP(return, "overlayfs is not supported");
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if (!supports_filesystem("overlay")) {
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self->skip_test = true;
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SKIP(return, "overlayfs is not supported (setup)");
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}
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prepare_layout(_metadata);
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@ -4089,8 +4099,8 @@ FIXTURE_SETUP(layout2_overlay)
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FIXTURE_TEARDOWN(layout2_overlay)
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{
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if (!supports_overlayfs())
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SKIP(return, "overlayfs is not supported");
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if (self->skip_test)
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SKIP(return, "overlayfs is not supported (teardown)");
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EXPECT_EQ(0, remove_path(lower_do1_fl3));
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EXPECT_EQ(0, remove_path(lower_dl1_fl2));
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@ -4123,8 +4133,8 @@ FIXTURE_TEARDOWN(layout2_overlay)
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TEST_F_FORK(layout2_overlay, no_restriction)
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{
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if (!supports_overlayfs())
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SKIP(return, "overlayfs is not supported");
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if (self->skip_test)
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SKIP(return, "overlayfs is not supported (test)");
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ASSERT_EQ(0, test_open(lower_fl1, O_RDONLY));
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ASSERT_EQ(0, test_open(lower_dl1, O_RDONLY));
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@ -4289,8 +4299,8 @@ TEST_F_FORK(layout2_overlay, same_content_different_file)
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size_t i;
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const char *path_entry;
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if (!supports_overlayfs())
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SKIP(return, "overlayfs is not supported");
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if (self->skip_test)
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SKIP(return, "overlayfs is not supported (test)");
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/* Sets rules on base directories (i.e. outside overlay scope). */
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ruleset_fd = create_ruleset(_metadata, ACCESS_RW, layer1_base);
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