diff options
Diffstat (limited to 'tools/testing/selftests/filesystems/statmount/statmount_test.c')
| -rw-r--r-- | tools/testing/selftests/filesystems/statmount/statmount_test.c | 278 |
1 files changed, 235 insertions, 43 deletions
diff --git a/tools/testing/selftests/filesystems/statmount/statmount_test.c b/tools/testing/selftests/filesystems/statmount/statmount_test.c index f048042e53e9..8dc018d47a93 100644 --- a/tools/testing/selftests/filesystems/statmount/statmount_test.c +++ b/tools/testing/selftests/filesystems/statmount/statmount_test.c @@ -13,7 +13,7 @@ #include <linux/stat.h> #include "statmount.h" -#include "../../kselftest.h" +#include "kselftest.h" static const char *const known_fs[] = { "9p", "adfs", "affs", "afs", "aio", "anon_inodefs", "apparmorfs", @@ -33,36 +33,6 @@ static const char *const known_fs[] = { "sysv", "tmpfs", "tracefs", "ubifs", "udf", "ufs", "v7", "vboxsf", "vfat", "virtiofs", "vxfs", "xenfs", "xfs", "zonefs", NULL }; -static struct statmount *statmount_alloc(uint64_t mnt_id, uint64_t mask, unsigned int flags) -{ - size_t bufsize = 1 << 15; - struct statmount *buf = NULL, *tmp = alloca(bufsize); - int tofree = 0; - int ret; - - for (;;) { - ret = statmount(mnt_id, 0, mask, tmp, bufsize, flags); - if (ret != -1) - break; - if (tofree) - free(tmp); - if (errno != EOVERFLOW) - return NULL; - bufsize <<= 1; - tofree = 1; - tmp = malloc(bufsize); - if (!tmp) - return NULL; - } - buf = malloc(tmp->size); - if (buf) - memcpy(buf, tmp, tmp->size); - if (tofree) - free(tmp); - - return buf; -} - static void write_file(const char *path, const char *val) { int fd = open(path, O_WRONLY); @@ -237,7 +207,7 @@ static void test_statmount_zero_mask(void) struct statmount sm; int ret; - ret = statmount(root_id, 0, 0, &sm, sizeof(sm), 0); + ret = statmount(root_id, 0, 0, 0, &sm, sizeof(sm), 0); if (ret == -1) { ksft_test_result_fail("statmount zero mask: %s\n", strerror(errno)); @@ -263,7 +233,7 @@ static void test_statmount_mnt_basic(void) int ret; uint64_t mask = STATMOUNT_MNT_BASIC; - ret = statmount(root_id, 0, mask, &sm, sizeof(sm), 0); + ret = statmount(root_id, 0, 0, mask, &sm, sizeof(sm), 0); if (ret == -1) { ksft_test_result_fail("statmount mnt basic: %s\n", strerror(errno)); @@ -323,7 +293,7 @@ static void test_statmount_sb_basic(void) struct statx sx; struct statfs sf; - ret = statmount(root_id, 0, mask, &sm, sizeof(sm), 0); + ret = statmount(root_id, 0, 0, mask, &sm, sizeof(sm), 0); if (ret == -1) { ksft_test_result_fail("statmount sb basic: %s\n", strerror(errno)); @@ -375,7 +345,7 @@ static void test_statmount_mnt_point(void) { struct statmount *sm; - sm = statmount_alloc(root_id, STATMOUNT_MNT_POINT, 0); + sm = statmount_alloc(root_id, 0, STATMOUNT_MNT_POINT, 0); if (!sm) { ksft_test_result_fail("statmount mount point: %s\n", strerror(errno)); @@ -405,7 +375,7 @@ static void test_statmount_mnt_root(void) assert(last_dir); last_dir++; - sm = statmount_alloc(root_id, STATMOUNT_MNT_ROOT, 0); + sm = statmount_alloc(root_id, 0, STATMOUNT_MNT_ROOT, 0); if (!sm) { ksft_test_result_fail("statmount mount root: %s\n", strerror(errno)); @@ -438,7 +408,7 @@ static void test_statmount_fs_type(void) const char *fs_type; const char *const *s; - sm = statmount_alloc(root_id, STATMOUNT_FS_TYPE, 0); + sm = statmount_alloc(root_id, 0, STATMOUNT_FS_TYPE, 0); if (!sm) { ksft_test_result_fail("statmount fs type: %s\n", strerror(errno)); @@ -467,7 +437,7 @@ static void test_statmount_mnt_opts(void) char *line = NULL; size_t len = 0; - sm = statmount_alloc(root_id, STATMOUNT_MNT_BASIC | STATMOUNT_MNT_OPTS, + sm = statmount_alloc(root_id, 0, STATMOUNT_MNT_BASIC | STATMOUNT_MNT_OPTS, 0); if (!sm) { ksft_test_result_fail("statmount mnt opts: %s\n", @@ -557,7 +527,7 @@ static void test_statmount_string(uint64_t mask, size_t off, const char *name) uint32_t start, i; int ret; - sm = statmount_alloc(root_id, mask, 0); + sm = statmount_alloc(root_id, 0, mask, 0); if (!sm) { ksft_test_result_fail("statmount %s: %s\n", name, strerror(errno)); @@ -586,14 +556,14 @@ static void test_statmount_string(uint64_t mask, size_t off, const char *name) exactsize = sm->size; shortsize = sizeof(*sm) + i; - ret = statmount(root_id, 0, mask, sm, exactsize, 0); + ret = statmount(root_id, 0, 0, mask, sm, exactsize, 0); if (ret == -1) { ksft_test_result_fail("statmount exact size: %s\n", strerror(errno)); goto out; } errno = 0; - ret = statmount(root_id, 0, mask, sm, shortsize, 0); + ret = statmount(root_id, 0, 0, mask, sm, shortsize, 0); if (ret != -1 || errno != EOVERFLOW) { ksft_test_result_fail("should have failed with EOVERFLOW: %s\n", strerror(errno)); @@ -658,6 +628,226 @@ static void test_listmount_tree(void) ksft_test_result_pass("listmount tree\n"); } +static void test_statmount_by_fd(void) +{ + struct statmount *sm = NULL; + char tmpdir[] = "/statmount.fd.XXXXXX"; + const char root[] = "/test"; + char subdir[PATH_MAX], tmproot[PATH_MAX]; + int fd; + + if (!mkdtemp(tmpdir)) { + ksft_perror("mkdtemp"); + return; + } + + if (mount("statmount.test", tmpdir, "tmpfs", 0, NULL)) { + ksft_perror("mount"); + rmdir(tmpdir); + return; + } + + snprintf(subdir, PATH_MAX, "%s%s", tmpdir, root); + snprintf(tmproot, PATH_MAX, "%s/%s", tmpdir, "chroot"); + + if (mkdir(subdir, 0755)) { + ksft_perror("mkdir"); + goto err_tmpdir; + } + + if (mount(subdir, subdir, NULL, MS_BIND, 0)) { + ksft_perror("mount"); + goto err_subdir; + } + + if (mkdir(tmproot, 0755)) { + ksft_perror("mkdir"); + goto err_subdir; + } + + fd = open(subdir, O_PATH); + if (fd < 0) { + ksft_perror("open"); + goto err_tmproot; + } + + if (chroot(tmproot)) { + ksft_perror("chroot"); + goto err_fd; + } + + sm = statmount_alloc_by_fd(fd, STATMOUNT_MNT_ROOT | STATMOUNT_MNT_POINT); + if (!sm) { + ksft_test_result_fail("statmount by fd failed: %s\n", strerror(errno)); + goto err_chroot; + } + + if (sm->size < sizeof(*sm)) { + ksft_test_result_fail("unexpected size: %u < %u\n", + sm->size, (uint32_t) sizeof(*sm)); + goto err_chroot; + } + + if (sm->mask & STATMOUNT_MNT_POINT) { + ksft_test_result_fail("STATMOUNT_MNT_POINT unexpectedly set in statmount\n"); + goto err_chroot; + } + + if (!(sm->mask & STATMOUNT_MNT_ROOT)) { + ksft_test_result_fail("STATMOUNT_MNT_ROOT not set in statmount\n"); + goto err_chroot; + } + + if (strcmp(root, sm->str + sm->mnt_root) != 0) { + ksft_test_result_fail("statmount returned incorrect mnt_root," + "statmount mnt_root: %s != %s\n", + sm->str + sm->mnt_root, root); + goto err_chroot; + } + + if (chroot(".")) { + ksft_perror("chroot"); + goto out; + } + + free(sm); + sm = statmount_alloc_by_fd(fd, STATMOUNT_MNT_ROOT | STATMOUNT_MNT_POINT); + if (!sm) { + ksft_test_result_fail("statmount by fd failed: %s\n", strerror(errno)); + goto err_fd; + } + + if (sm->size < sizeof(*sm)) { + ksft_test_result_fail("unexpected size: %u < %u\n", + sm->size, (uint32_t) sizeof(*sm)); + goto out; + } + + if (!(sm->mask & STATMOUNT_MNT_POINT)) { + ksft_test_result_fail("STATMOUNT_MNT_POINT not set in statmount\n"); + goto out; + } + + if (!(sm->mask & STATMOUNT_MNT_ROOT)) { + ksft_test_result_fail("STATMOUNT_MNT_ROOT not set in statmount\n"); + goto out; + } + + if (strcmp(subdir, sm->str + sm->mnt_point) != 0) { + ksft_test_result_fail("statmount returned incorrect mnt_point," + "statmount mnt_point: %s != %s\n", sm->str + sm->mnt_point, subdir); + goto out; + } + + if (strcmp(root, sm->str + sm->mnt_root) != 0) { + ksft_test_result_fail("statmount returned incorrect mnt_root," + "statmount mnt_root: %s != %s\n", sm->str + sm->mnt_root, root); + goto out; + } + + ksft_test_result_pass("statmount by fd\n"); + goto out; +err_chroot: + chroot("."); +out: + free(sm); +err_fd: + close(fd); +err_tmproot: + rmdir(tmproot); +err_subdir: + umount2(subdir, MNT_DETACH); + rmdir(subdir); +err_tmpdir: + umount2(tmpdir, MNT_DETACH); + rmdir(tmpdir); +} + +static void test_statmount_by_fd_unmounted(void) +{ + const char root[] = "/test.unmounted"; + char tmpdir[] = "/statmount.fd.XXXXXX"; + char subdir[PATH_MAX]; + int fd; + struct statmount *sm = NULL; + + if (!mkdtemp(tmpdir)) { + ksft_perror("mkdtemp"); + return; + } + + if (mount("statmount.test", tmpdir, "tmpfs", 0, NULL)) { + ksft_perror("mount"); + rmdir(tmpdir); + return; + } + + snprintf(subdir, PATH_MAX, "%s%s", tmpdir, root); + + if (mkdir(subdir, 0755)) { + ksft_perror("mkdir"); + goto err_tmpdir; + } + + if (mount(subdir, subdir, 0, MS_BIND, NULL)) { + ksft_perror("mount"); + goto err_subdir; + } + + fd = open(subdir, O_PATH); + if (fd < 0) { + ksft_perror("open"); + goto err_subdir; + } + + if (umount2(tmpdir, MNT_DETACH)) { + ksft_perror("umount2"); + goto err_fd; + } + + sm = statmount_alloc_by_fd(fd, STATMOUNT_MNT_POINT | STATMOUNT_MNT_ROOT); + if (!sm) { + ksft_test_result_fail("statmount by fd unmounted: %s\n", + strerror(errno)); + goto err_sm; + } + + if (sm->size < sizeof(*sm)) { + ksft_test_result_fail("unexpected size: %u < %u\n", + sm->size, (uint32_t) sizeof(*sm)); + goto err_sm; + } + + if (sm->mask & STATMOUNT_MNT_POINT) { + ksft_test_result_fail("STATMOUNT_MNT_POINT unexpectedly set in mask\n"); + goto err_sm; + } + + if (!(sm->mask & STATMOUNT_MNT_ROOT)) { + ksft_test_result_fail("STATMOUNT_MNT_ROOT not set in mask\n"); + goto err_sm; + } + + if (strcmp(sm->str + sm->mnt_root, root) != 0) { + ksft_test_result_fail("statmount returned incorrect mnt_root," + "statmount mnt_root: %s != %s\n", + sm->str + sm->mnt_root, root); + goto err_sm; + } + + ksft_test_result_pass("statmount by fd on unmounted mount\n"); +err_sm: + free(sm); +err_fd: + close(fd); +err_subdir: + umount2(subdir, MNT_DETACH); + rmdir(subdir); +err_tmpdir: + umount2(tmpdir, MNT_DETACH); + rmdir(tmpdir); +} + #define str_off(memb) (offsetof(struct statmount, memb) / sizeof(uint32_t)) int main(void) @@ -669,14 +859,14 @@ int main(void) ksft_print_header(); - ret = statmount(0, 0, 0, NULL, 0, 0); + ret = statmount(0, 0, 0, 0, NULL, 0, 0); assert(ret == -1); if (errno == ENOSYS) ksft_exit_skip("statmount() syscall not supported\n"); setup_namespace(); - ksft_set_plan(15); + ksft_set_plan(17); test_listmount_empty_root(); test_statmount_zero_mask(); test_statmount_mnt_basic(); @@ -693,6 +883,8 @@ int main(void) test_statmount_string(all_mask, str_off(fs_type), "fs type & all"); test_listmount_tree(); + test_statmount_by_fd_unmounted(); + test_statmount_by_fd(); if (ksft_get_fail_cnt() + ksft_get_error_cnt() > 0) |