[LTP] [PATCH v1] Rewrite process_vm01 test using new LTP API
Andrea Cervesato
andrea.cervesato@suse.com
Thu Oct 6 13:10:36 CEST 2022
Hi,
this patch has been sent already. An accident using "git send-email"
command.
Andrea
On 10/6/22 13:06, Andrea Cervesato wrote:
> Now test is run on process_vm_writev by default and process_vm_readv can
> be selected by passing -r command line option.
>
> Signed-off-by: Andrea Cervesato <andrea.cervesato@suse.com>
> ---
> runtest/syscalls | 2 +-
> testcases/kernel/syscalls/cma/process_vm01.c | 464 ++++++++-----------
> 2 files changed, 188 insertions(+), 278 deletions(-)
>
> diff --git a/runtest/syscalls b/runtest/syscalls
> index 3847e8af2..70f22fbd5 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -1031,7 +1031,7 @@ profil01 profil01
> process_vm_readv01 process_vm01 -r
> process_vm_readv02 process_vm_readv02
> process_vm_readv03 process_vm_readv03
> -process_vm_writev01 process_vm01 -w
> +process_vm_writev01 process_vm01
> process_vm_writev02 process_vm_writev02
>
> prot_hsymlinks prot_hsymlinks
> diff --git a/testcases/kernel/syscalls/cma/process_vm01.c b/testcases/kernel/syscalls/cma/process_vm01.c
> index 16f14d66b..bfd5c5acb 100644
> --- a/testcases/kernel/syscalls/cma/process_vm01.c
> +++ b/testcases/kernel/syscalls/cma/process_vm01.c
> @@ -1,47 +1,18 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> /*
> - * Copyright (C) 2012 Linux Test Project, Inc.
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of version 2 of the GNU General Public
> - * License as published by the Free Software Foundation.
> - *
> - * This program is distributed in the hope that it would be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> - *
> - * Further, this software is distributed without any warranty that it
> - * is free of the rightful claim of any third person regarding
> - * infringement or the like. Any license provided herein, whether
> - * implied or otherwise, applies only to this software file. Patent
> - * licenses, if any, provided herein do not apply to combinations of
> - * this program with other software, or any other product whatsoever.
> - *
> - * You should have received a copy of the GNU General Public License
> - * along with this program; if not, write the Free Software
> - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> - * 02110-1301, USA.
> + * Copyright (c) Linux Test Project, 2012
> + * Copyright (C) 2021 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
> */
>
> -/*
> - * errno tests shared by process_vm_readv, process_vm_writev tests.
> +/*\
> + * [Description]
> + *
> + * Test errno codes in process_vm_readv and process_vm_writev syscalls.
> */
> -#include <sys/types.h>
> -#include <sys/stat.h>
> -#include <sys/syscall.h>
> -#include <sys/uio.h>
> -#include <sys/wait.h>
> -#include <sys/mman.h>
> -#include <errno.h>
> -#include <signal.h>
> -#include <stdio.h>
> -#include <stdlib.h>
> -#include <string.h>
> -#include <unistd.h>
> -#include <limits.h>
> +
> #include <pwd.h>
> -#include "config.h"
> -#include "test.h"
> -#include "safe_macros.h"
> +#include <stdlib.h>
> +#include "tst_test.h"
> #include "lapi/syscalls.h"
>
> struct process_vm_params {
> @@ -56,137 +27,27 @@ struct process_vm_params {
> unsigned long flags;
> };
>
> -static int rflag;
> -static int wflag;
> -
> -static option_t options[] = {
> - {"r", &rflag, NULL},
> - {"w", &wflag, NULL},
> - {NULL, NULL, NULL}
> -};
> -
> -static char TCID_readv[] = "process_vm_readv";
> -static char TCID_writev[] = "process_vm_writev";
> -char *TCID = "cma01";
> -int TST_TOTAL = 1;
> -static void (*cma_test_params) (struct process_vm_params * params) = NULL;
> -
> -static void setup(char *argv[]);
> -static void cleanup(void);
> -static void help(void);
> -
> -static void cma_test_params_read(struct process_vm_params *params);
> -static void cma_test_params_write(struct process_vm_params *params);
> -static void cma_test_errnos(void);
> -
> -int main(int argc, char *argv[])
> -{
> - int lc;
> -
> - tst_parse_opts(argc, argv, options, &help);
> -
> - setup(argv);
> - for (lc = 0; TEST_LOOPING(lc); lc++) {
> - tst_count = 0;
> - cma_test_errnos();
> - }
> - cleanup();
> - tst_exit();
> -}
> -
> -static void setup(char *argv[])
> -{
> - tst_require_root();
> -
> - if (rflag && wflag)
> - tst_brkm(TBROK, NULL, "Parameters -r -w can not be used"
> - " at the same time.");
> - else if (rflag) {
> - TCID = TCID_readv;
> - cma_test_params = cma_test_params_read;
> - } else if (wflag) {
> - TCID = TCID_writev;
> - cma_test_params = cma_test_params_write;
> - } else
> - tst_brkm(TBROK, NULL, "Parameter missing, required -r or -w.");
> - TEST_PAUSE;
> -}
> -
> -static void cleanup(void)
> -{
> -}
> -
> -static void help(void)
> -{
> - printf(" -r Use process_vm_readv\n");
> - printf(" -w Use process_vm_writev\n");
> -}
> -
> -static void cma_test_params_read(struct process_vm_params *params)
> -{
> - TEST(tst_syscall(__NR_process_vm_readv,
> - params->pid,
> - params->lvec, params->liovcnt,
> - params->rvec, params->riovcnt,
> - params->flags));
> -}
> -
> -static void cma_test_params_write(struct process_vm_params *params)
> -{
> - TEST(tst_syscall(__NR_process_vm_writev,
> - params->pid,
> - params->lvec, params->liovcnt,
> - params->rvec, params->riovcnt,
> - params->flags));
> -}
> -
> -static int cma_check_ret(long expected_ret, long act_ret)
> -{
> - if (expected_ret == act_ret) {
> - tst_resm(TPASS, "expected ret success - "
> - "returned value = %ld", act_ret);
> - } else {
> - tst_resm(TFAIL, "unexpected failure - "
> - "returned value = %ld, expected: %ld",
> - act_ret, expected_ret);
> - return 1;
> - }
> - return 0;
> -}
> -
> -static int cma_check_errno(long expected_errno)
> -{
> - if (TEST_ERRNO == expected_errno)
> - tst_resm(TPASS | TTERRNO, "expected failure");
> - else if (TEST_ERRNO == 0) {
> - tst_resm(TFAIL, "call succeeded unexpectedly");
> - return 1;
> - } else {
> - tst_resm(TFAIL | TTERRNO, "unexpected failure - "
> - "expected = %ld : %s, actual",
> - expected_errno, strerror(expected_errno));
> - return 2;
> - }
> - return 0;
> -}
> +static char *str_read;
> +static void (*test_params)(struct process_vm_params *params);
>
> -static struct process_vm_params *cma_alloc_sane_params(void)
> +static struct process_vm_params *alloc_params(void)
> {
> struct process_vm_params *sane_params;
> int len;
>
> len = getpagesize();
> - sane_params = SAFE_MALLOC(NULL, sizeof(struct process_vm_params));
> +
> + sane_params = SAFE_MALLOC(sizeof(struct process_vm_params));
> sane_params->len = len;
> - sane_params->ldummy = SAFE_MALLOC(NULL, len);
> - sane_params->rdummy = SAFE_MALLOC(NULL, len);
> + sane_params->ldummy = SAFE_MALLOC(len);
> + sane_params->rdummy = SAFE_MALLOC(len);
>
> - sane_params->lvec = SAFE_MALLOC(NULL, sizeof(struct iovec));
> + sane_params->lvec = SAFE_MALLOC(sizeof(struct process_vm_params));
> sane_params->lvec->iov_base = sane_params->ldummy;
> sane_params->lvec->iov_len = len;
> sane_params->liovcnt = 1;
>
> - sane_params->rvec = SAFE_MALLOC(NULL, sizeof(struct iovec));
> + sane_params->rvec = SAFE_MALLOC(sizeof(struct process_vm_params));
> sane_params->rvec->iov_base = sane_params->rdummy;
> sane_params->rvec->iov_len = len;
> sane_params->riovcnt = 1;
> @@ -197,7 +58,7 @@ static struct process_vm_params *cma_alloc_sane_params(void)
> return sane_params;
> }
>
> -static void cma_free_params(struct process_vm_params *params)
> +static void free_params(struct process_vm_params *params)
> {
> if (params) {
> free(params->ldummy);
> @@ -208,195 +69,244 @@ static void cma_free_params(struct process_vm_params *params)
> }
> }
>
> -static void cma_test_sane_params(void)
> +static void test_readv(struct process_vm_params *params)
> +{
> + TEST(tst_syscall(__NR_process_vm_readv,
> + params->pid,
> + params->lvec, params->liovcnt,
> + params->rvec, params->riovcnt,
> + params->flags));
> +}
> +
> +static void test_writev(struct process_vm_params *params)
> +{
> + TEST(tst_syscall(__NR_process_vm_writev,
> + params->pid,
> + params->lvec, params->liovcnt,
> + params->rvec, params->riovcnt,
> + params->flags));
> +}
> +
> +static void check_errno(long expected_errno)
> +{
> + if (TST_ERR == expected_errno)
> + tst_res(TPASS | TTERRNO, "expected failure");
> + else if (TST_ERR == 0)
> + tst_res(TFAIL, "call succeeded unexpectedly");
> + else
> + tst_res(TFAIL | TTERRNO, "unexpected failure - "
> + "expected = %ld : %s, actual",
> + expected_errno, strerror(expected_errno));
> +}
> +
> +static void test_sane_params(void)
> {
> struct process_vm_params *sane_params;
>
> - sane_params = cma_alloc_sane_params();
> - tst_resm(TINFO, "test_sane_params");
> - cma_test_params(sane_params);
> - cma_check_ret(sane_params->len, TEST_RETURN);
> - cma_free_params(sane_params);
> + tst_res(TINFO, "Testing sane parameters");
> +
> + sane_params = alloc_params();
> + test_params(sane_params);
> + TST_EXP_EQ_LI(TST_RET, sane_params->len);
> + free_params(sane_params);
> }
>
> -static void cma_test_flags(void)
> +static void test_flags(void)
> {
> struct process_vm_params *params;
> long flags[] = { -INT_MAX, -1, 1, INT_MAX, 0 };
> - int flags_size = sizeof(flags) / sizeof(flags[0]);
> + int flags_size = ARRAY_SIZE(flags) / sizeof(flags[0]);
> int i;
>
> - params = cma_alloc_sane_params();
> + params = alloc_params();
> +
> for (i = 0; i < flags_size; i++) {
> params->flags = flags[i];
> - tst_resm(TINFO, "test_flags, flags=%ld", flags[i]);
> - cma_test_params(params);
> +
> + tst_res(TINFO, "Testing flags=%ld", flags[i]);
> + test_params(params);
> +
> /* atm. only flags == 0 is allowed, everything else
> - * should fail with EINVAL */
> + * should fail with EINVAL
> + */
> if (flags[i] != 0) {
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(EINVAL);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(EINVAL);
> } else {
> - cma_check_ret(params->len, TEST_RETURN);
> + TST_EXP_EQ_LI(TST_RET, params->len);
> }
> }
> - cma_free_params(params);
> +
> + free_params(params);
> }
>
> -static void cma_test_iov_len_overflow(void)
> +static void test_iov_len_overflow(void)
> {
> struct process_vm_params *params;
> - ssize_t maxlen = -1;
> - params = cma_alloc_sane_params();
> -
> - params->lvec->iov_len = maxlen;
> - params->rvec->iov_len = maxlen;
> - tst_resm(TINFO, "test_iov_len_overflow");
> - cma_test_params(params);
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(EINVAL);
> - cma_free_params(params);
> +
> + tst_res(TINFO, "Testing iov_len = -1");
> +
> + params = alloc_params();
> + params->lvec->iov_len = -1;
> + params->rvec->iov_len = -1;
> + test_params(params);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(EINVAL);
> + free_params(params);
> }
>
> -static void cma_test_iov_invalid(void)
> +static void test_iov_invalid(void)
> {
> struct process_vm_params *sane_params;
> struct process_vm_params params_copy;
>
> - sane_params = cma_alloc_sane_params();
> - /* make a shallow copy we can 'damage' */
> + sane_params = alloc_params();
>
> + tst_res(TINFO, "Testing lvec->iov_base = -1");
> params_copy = *sane_params;
> - tst_resm(TINFO, "test_iov_invalid - lvec->iov_base");
> params_copy.lvec->iov_base = (void *)-1;
> - cma_test_params(¶ms_copy);
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(EFAULT);
> + test_params(¶ms_copy);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(EFAULT);
>
> + tst_res(TINFO, "Testing rvec->iov_base = -1");
> params_copy = *sane_params;
> - tst_resm(TINFO, "test_iov_invalid - rvec->iov_base");
> params_copy.rvec->iov_base = (void *)-1;
> - cma_test_params(¶ms_copy);
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(EFAULT);
> + test_params(¶ms_copy);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(EFAULT);
>
> + tst_res(TINFO, "Testing lvec = -1");
> params_copy = *sane_params;
> - tst_resm(TINFO, "test_iov_invalid - lvec");
> params_copy.lvec = (void *)-1;
> - cma_test_params(¶ms_copy);
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(EFAULT);
> + test_params(¶ms_copy);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(EFAULT);
>
> + tst_res(TINFO, "Testing rvec = -1");
> params_copy = *sane_params;
> - tst_resm(TINFO, "test_iov_invalid - rvec");
> params_copy.rvec = (void *)-1;
> - cma_test_params(¶ms_copy);
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(EFAULT);
> + test_params(¶ms_copy);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(EFAULT);
>
> - cma_free_params(sane_params);
> + free_params(sane_params);
> }
>
> -static void cma_test_invalid_pid(void)
> +static void test_invalid_pid(void)
> {
> pid_t invalid_pid = -1;
> struct process_vm_params *params;
> + struct process_vm_params params_copy;
> +
> + params = alloc_params();
> +
> + tst_res(TINFO, "Testing invalid PID");
> + params_copy = *params;
> + params_copy.pid = invalid_pid;
> + test_params(¶ms_copy);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(ESRCH);
>
> - params = cma_alloc_sane_params();
> - tst_resm(TINFO, "test_invalid_pid");
> - params->pid = invalid_pid;
> - cma_test_params(params);
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(ESRCH);
> - cma_free_params(params);
> -
> - invalid_pid = tst_get_unused_pid(cleanup);
> -
> - params = cma_alloc_sane_params();
> - params->pid = invalid_pid;
> - cma_test_params(params);
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(ESRCH);
> - cma_free_params(params);
> + tst_res(TINFO, "Testing unused PID");
> + params_copy = *params;
> + invalid_pid = tst_get_unused_pid();
> + params_copy.pid = invalid_pid;
> + test_params(¶ms_copy);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(ESRCH);
> +
> + free_params(params);
> }
>
> -static void cma_test_invalid_perm(void)
> +static void test_invalid_perm(void)
> {
> char nobody_uid[] = "nobody";
> struct passwd *ltpuser;
> - int status;
> struct process_vm_params *params;
> pid_t child_pid;
> pid_t parent_pid;
> - int ret = 0;
> + int status;
> +
> + tst_res(TINFO, "Testing invalid permissions on given PID");
>
> - tst_resm(TINFO, "test_invalid_perm");
> parent_pid = getpid();
> - child_pid = fork();
> - switch (child_pid) {
> - case -1:
> - tst_brkm(TBROK | TERRNO, cleanup, "fork");
> - break;
> - case 0:
> - ltpuser = getpwnam(nobody_uid);
> - if (ltpuser == NULL)
> - tst_brkm(TBROK | TERRNO, NULL, "getpwnam failed");
> - SAFE_SETUID(NULL, ltpuser->pw_uid);
> -
> - params = cma_alloc_sane_params();
> + child_pid = SAFE_FORK();
> + if (!child_pid) {
> + ltpuser = SAFE_GETPWNAM(nobody_uid);
> + SAFE_SETUID(ltpuser->pw_uid);
> +
> + params = alloc_params();
> params->pid = parent_pid;
> - cma_test_params(params);
> - ret |= cma_check_ret(-1, TEST_RETURN);
> - ret |= cma_check_errno(EPERM);
> - cma_free_params(params);
> - exit(ret);
> - default:
> - SAFE_WAITPID(cleanup, child_pid, &status, 0);
> - if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
> - tst_resm(TFAIL, "child returns %d", status);
> + test_params(params);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(EPERM);
> + free_params(params);
> + return;
> }
> +
> + SAFE_WAITPID(child_pid, &status, 0);
> }
>
> -static void cma_test_invalid_protection(void)
> +static void test_invalid_protection(void)
> {
> struct process_vm_params *sane_params;
> struct process_vm_params params_copy;
> - void *p;
> -
> - sane_params = cma_alloc_sane_params();
> - /* make a shallow copy we can 'damage' */
> + void *data;
> + int len;
>
> - p = mmap(NULL, getpagesize(), PROT_NONE,
> - MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
> - if (p == MAP_FAILED)
> - tst_brkm(TBROK | TERRNO, cleanup, "mmap");
> + len = getpagesize();
> + sane_params = alloc_params();
> + data = SAFE_MMAP(NULL, len, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
>
> + tst_res(TINFO, "Testing data with invalid protection (lvec)");
> params_copy = *sane_params;
> - params_copy.lvec->iov_base = p;
> - tst_resm(TINFO, "test_invalid_protection lvec");
> - cma_test_params(¶ms_copy);
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(EFAULT);
> + params_copy.lvec->iov_base = data;
> + test_params(¶ms_copy);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(EFAULT);
>
> + tst_res(TINFO, "Testing data with invalid protection (rvec)");
> params_copy = *sane_params;
> - params_copy.rvec->iov_base = p;
> - tst_resm(TINFO, "test_invalid_protection rvec");
> - cma_test_params(¶ms_copy);
> - cma_check_ret(-1, TEST_RETURN);
> - cma_check_errno(EFAULT);
> + params_copy.rvec->iov_base = data;
> + test_params(¶ms_copy);
> + TST_EXP_EQ_LI(TST_RET, -1);
> + check_errno(EFAULT);
>
> - SAFE_MUNMAP(cleanup, p, getpagesize());
> + SAFE_MUNMAP(data, len);
> + free_params(sane_params);
> +}
>
> - cma_free_params(sane_params);
> +static void run(void)
> +{
> + test_sane_params();
> + test_flags();
> + test_iov_len_overflow();
> + test_iov_invalid();
> + test_invalid_pid();
> + test_invalid_perm();
> + test_invalid_protection();
> }
>
> -static void cma_test_errnos(void)
> +static void setup(void)
> {
> - cma_test_sane_params();
> - cma_test_flags();
> - cma_test_iov_len_overflow();
> - cma_test_iov_invalid();
> - cma_test_invalid_pid();
> - cma_test_invalid_perm();
> - cma_test_invalid_protection();
> + if (str_read) {
> + tst_res(TINFO, "Selected process_vm_readv");
> + test_params = test_readv;
> + } else {
> + tst_res(TINFO, "Selected process_vm_writev");
> + test_params = test_writev;
> + }
> }
> +
> +static struct tst_test test = {
> + .test_all = run,
> + .setup = setup,
> + .forks_child = 1,
> + .needs_checkpoints = 1,
> + .needs_root = 1,
> + .options = (struct tst_option[]) {
> + {"r", &str_read, "Use process_vm_read instead of process_vm_write"},
> + {},
> + },
> +};
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