zfs-builds-mm/zfs-0.8.4/tests/zfs-tests/cmd/xattrtest/xattrtest.c

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2020-07-19 16:21:53 +02:00
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2016 Lawrence Livermore National Security, LLC.
*/
/*
* An extended attribute (xattr) correctness test. This program creates
* N files and sets M attrs on them of size S. Optionally is will verify
* a pattern stored in the xattr.
*/
#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include <fcntl.h>
#include <time.h>
#include <unistd.h>
#include <sys/xattr.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <linux/limits.h>
extern char *program_invocation_short_name;
#define ERROR(fmt, ...) \
fprintf(stderr, "%s: %s:%d: %s: " fmt "\n", \
program_invocation_short_name, __FILE__, __LINE__, \
__func__, ## __VA_ARGS__);
static const char shortopts[] = "hvycdn:f:x:s:p:t:e:rRko:";
static const struct option longopts[] = {
{ "help", no_argument, 0, 'h' },
{ "verbose", no_argument, 0, 'v' },
{ "verify", no_argument, 0, 'y' },
{ "nth", required_argument, 0, 'n' },
{ "files", required_argument, 0, 'f' },
{ "xattrs", required_argument, 0, 'x' },
{ "size", required_argument, 0, 's' },
{ "path", required_argument, 0, 'p' },
{ "synccaches", no_argument, 0, 'c' },
{ "dropcaches", no_argument, 0, 'd' },
{ "script", required_argument, 0, 't' },
{ "seed", required_argument, 0, 'e' },
{ "random", no_argument, 0, 'r' },
{ "randomvalue", no_argument, 0, 'R' },
{ "keep", no_argument, 0, 'k' },
{ "only", required_argument, 0, 'o' },
{ 0, 0, 0, 0 }
};
enum phases {
PHASE_ALL = 0,
PHASE_CREATE,
PHASE_SETXATTR,
PHASE_GETXATTR,
PHASE_UNLINK,
PHASE_INVAL
};
static int verbose = 0;
static int verify = 0;
static int synccaches = 0;
static int dropcaches = 0;
static int nth = 0;
static int files = 1000;
static int xattrs = 1;
static int size = 6;
static int size_is_random = 0;
static int value_is_random = 0;
static int keep_files = 0;
static int phase = PHASE_ALL;
static char path[PATH_MAX] = "/tmp/xattrtest";
static char script[PATH_MAX] = "/bin/true";
static char xattrbytes[XATTR_SIZE_MAX];
static int
usage(int argc, char **argv)
{
fprintf(stderr,
"usage: %s [-hvycdrRk] [-n <nth>] [-f <files>] [-x <xattrs>]\n"
" [-s <bytes>] [-p <path>] [-t <script> ] [-o <phase>]\n",
argv[0]);
fprintf(stderr,
" --help -h This help\n"
" --verbose -v Increase verbosity\n"
" --verify -y Verify xattr contents\n"
" --nth -n <nth> Print every nth file\n"
" --files -f <files> Set xattrs on N files\n"
" --xattrs -x <xattrs> Set N xattrs on each file\n"
" --size -s <bytes> Set N bytes per xattr\n"
" --path -p <path> Path to files\n"
" --synccaches -c Sync caches between phases\n"
" --dropcaches -d Drop caches between phases\n"
" --script -t <script> Exec script between phases\n"
" --seed -e <seed> Random seed value\n"
" --random -r Randomly sized xattrs [16-size]\n"
" --randomvalue -R Random xattr values\n"
" --keep -k Don't unlink files\n"
" --only -o <num> Only run phase N\n"
" 0=all, 1=create, 2=setxattr,\n"
" 3=getxattr, 4=unlink\n\n");
return (1);
}
static int
parse_args(int argc, char **argv)
{
long seed = time(NULL);
int c;
int rc = 0;
while ((c = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) {
switch (c) {
case 'h':
return (usage(argc, argv));
case 'v':
verbose++;
break;
case 'y':
verify = 1;
break;
case 'n':
nth = strtol(optarg, NULL, 0);
break;
case 'f':
files = strtol(optarg, NULL, 0);
break;
case 'x':
xattrs = strtol(optarg, NULL, 0);
break;
case 's':
size = strtol(optarg, NULL, 0);
if (size > XATTR_SIZE_MAX) {
fprintf(stderr, "Error: the -s value may not "
"be greater than %d\n", XATTR_SIZE_MAX);
rc = 1;
}
break;
case 'p':
strncpy(path, optarg, PATH_MAX);
path[PATH_MAX - 1] = '\0';
break;
case 'c':
synccaches = 1;
break;
case 'd':
dropcaches = 1;
break;
case 't':
strncpy(script, optarg, PATH_MAX);
script[PATH_MAX - 1] = '\0';
break;
case 'e':
seed = strtol(optarg, NULL, 0);
break;
case 'r':
size_is_random = 1;
break;
case 'R':
value_is_random = 1;
break;
case 'k':
keep_files = 1;
break;
case 'o':
phase = strtol(optarg, NULL, 0);
if (phase <= PHASE_ALL || phase >= PHASE_INVAL) {
fprintf(stderr, "Error: the -o value must be "
"greater than %d and less than %d\n",
PHASE_ALL, PHASE_INVAL);
rc = 1;
}
break;
default:
rc = 1;
break;
}
}
if (rc != 0)
return (rc);
srandom(seed);
if (verbose) {
fprintf(stdout, "verbose: %d\n", verbose);
fprintf(stdout, "verify: %d\n", verify);
fprintf(stdout, "nth: %d\n", nth);
fprintf(stdout, "files: %d\n", files);
fprintf(stdout, "xattrs: %d\n", xattrs);
fprintf(stdout, "size: %d\n", size);
fprintf(stdout, "path: %s\n", path);
fprintf(stdout, "synccaches: %d\n", synccaches);
fprintf(stdout, "dropcaches: %d\n", dropcaches);
fprintf(stdout, "script: %s\n", script);
fprintf(stdout, "seed: %ld\n", seed);
fprintf(stdout, "random size: %d\n", size_is_random);
fprintf(stdout, "random value: %d\n", value_is_random);
fprintf(stdout, "keep: %d\n", keep_files);
fprintf(stdout, "only: %d\n", phase);
fprintf(stdout, "%s", "\n");
}
return (rc);
}
static int
drop_caches(void)
{
char file[] = "/proc/sys/vm/drop_caches";
int fd, rc;
fd = open(file, O_WRONLY);
if (fd == -1) {
ERROR("Error %d: open(\"%s\", O_WRONLY)\n", errno, file);
return (errno);
}
rc = write(fd, "3", 1);
if ((rc == -1) || (rc != 1)) {
ERROR("Error %d: write(%d, \"3\", 1)\n", errno, fd);
(void) close(fd);
return (errno);
}
rc = close(fd);
if (rc == -1) {
ERROR("Error %d: close(%d)\n", errno, fd);
return (errno);
}
return (0);
}
static int
run_process(const char *path, char *argv[])
{
pid_t pid;
int rc, devnull_fd;
pid = vfork();
if (pid == 0) {
devnull_fd = open("/dev/null", O_WRONLY);
if (devnull_fd < 0)
_exit(-1);
(void) dup2(devnull_fd, STDOUT_FILENO);
(void) dup2(devnull_fd, STDERR_FILENO);
close(devnull_fd);
(void) execvp(path, argv);
_exit(-1);
} else if (pid > 0) {
int status;
while ((rc = waitpid(pid, &status, 0)) == -1 &&
errno == EINTR) { }
if (rc < 0 || !WIFEXITED(status))
return (-1);
return (WEXITSTATUS(status));
}
return (-1);
}
static int
post_hook(char *phase)
{
char *argv[3] = { script, phase, (char *)0 };
int rc;
if (synccaches)
sync();
if (dropcaches) {
rc = drop_caches();
if (rc)
return (rc);
}
rc = run_process(script, argv);
if (rc)
return (rc);
return (0);
}
#define USEC_PER_SEC 1000000
static void
timeval_normalize(struct timeval *tv, time_t sec, suseconds_t usec)
{
while (usec >= USEC_PER_SEC) {
usec -= USEC_PER_SEC;
sec++;
}
while (usec < 0) {
usec += USEC_PER_SEC;
sec--;
}
tv->tv_sec = sec;
tv->tv_usec = usec;
}
static void
timeval_sub(struct timeval *delta, struct timeval *tv1, struct timeval *tv2)
{
timeval_normalize(delta,
tv1->tv_sec - tv2->tv_sec,
tv1->tv_usec - tv2->tv_usec);
}
static double
timeval_sub_seconds(struct timeval *tv1, struct timeval *tv2)
{
struct timeval delta;
timeval_sub(&delta, tv1, tv2);
return ((double)delta.tv_usec / USEC_PER_SEC + delta.tv_sec);
}
static int
create_files(void)
{
int i, rc;
char *file = NULL;
struct timeval start, stop;
double seconds;
size_t fsize;
fsize = PATH_MAX;
file = malloc(fsize);
if (file == NULL) {
rc = ENOMEM;
ERROR("Error %d: malloc(%d) bytes for file name\n", rc,
PATH_MAX);
goto out;
}
(void) gettimeofday(&start, NULL);
for (i = 1; i <= files; i++) {
if (snprintf(file, fsize, "%s/file-%d", path, i) >= fsize) {
rc = EINVAL;
ERROR("Error %d: path too long\n", rc);
goto out;
}
if (nth && ((i % nth) == 0))
fprintf(stdout, "create: %s\n", file);
rc = unlink(file);
if ((rc == -1) && (errno != ENOENT)) {
ERROR("Error %d: unlink(%s)\n", errno, file);
rc = errno;
goto out;
}
rc = open(file, O_CREAT, 0644);
if (rc == -1) {
ERROR("Error %d: open(%s, O_CREATE, 0644)\n",
errno, file);
rc = errno;
goto out;
}
rc = close(rc);
if (rc == -1) {
ERROR("Error %d: close(%d)\n", errno, rc);
rc = errno;
goto out;
}
}
(void) gettimeofday(&stop, NULL);
seconds = timeval_sub_seconds(&stop, &start);
fprintf(stdout, "create: %f seconds %f creates/second\n",
seconds, files / seconds);
rc = post_hook("post");
out:
if (file)
free(file);
return (rc);
}
static int
get_random_bytes(char *buf, size_t bytes)
{
int rand;
ssize_t bytes_read = 0;
rand = open("/dev/urandom", O_RDONLY);
if (rand < 0)
return (rand);
while (bytes_read < bytes) {
ssize_t rc = read(rand, buf + bytes_read, bytes - bytes_read);
if (rc < 0)
break;
bytes_read += rc;
}
(void) close(rand);
return (bytes_read);
}
static int
setxattrs(void)
{
int i, j, rnd_size = size, shift, rc = 0;
char name[XATTR_NAME_MAX];
char *value = NULL;
char *file = NULL;
struct timeval start, stop;
double seconds;
size_t fsize;
value = malloc(XATTR_SIZE_MAX);
if (value == NULL) {
rc = ENOMEM;
ERROR("Error %d: malloc(%d) bytes for xattr value\n", rc,
XATTR_SIZE_MAX);
goto out;
}
fsize = PATH_MAX;
file = malloc(fsize);
if (file == NULL) {
rc = ENOMEM;
ERROR("Error %d: malloc(%d) bytes for file name\n", rc,
PATH_MAX);
goto out;
}
(void) gettimeofday(&start, NULL);
for (i = 1; i <= files; i++) {
if (snprintf(file, fsize, "%s/file-%d", path, i) >= fsize) {
rc = EINVAL;
ERROR("Error %d: path too long\n", rc);
goto out;
}
if (nth && ((i % nth) == 0))
fprintf(stdout, "setxattr: %s\n", file);
for (j = 1; j <= xattrs; j++) {
if (size_is_random)
rnd_size = (random() % (size - 16)) + 16;
(void) sprintf(name, "user.%d", j);
shift = sprintf(value, "size=%d ", rnd_size);
memcpy(value + shift, xattrbytes,
sizeof (xattrbytes) - shift);
rc = lsetxattr(file, name, value, rnd_size, 0);
if (rc == -1) {
ERROR("Error %d: lsetxattr(%s, %s, ..., %d)\n",
errno, file, name, rnd_size);
goto out;
}
}
}
(void) gettimeofday(&stop, NULL);
seconds = timeval_sub_seconds(&stop, &start);
fprintf(stdout, "setxattr: %f seconds %f setxattrs/second\n",
seconds, (files * xattrs) / seconds);
rc = post_hook("post");
out:
if (file)
free(file);
if (value)
free(value);
return (rc);
}
static int
getxattrs(void)
{
int i, j, rnd_size, shift, rc = 0;
char name[XATTR_NAME_MAX];
char *verify_value = NULL;
char *verify_string;
char *value = NULL;
char *value_string;
char *file = NULL;
struct timeval start, stop;
double seconds;
size_t fsize;
verify_value = malloc(XATTR_SIZE_MAX);
if (verify_value == NULL) {
rc = ENOMEM;
ERROR("Error %d: malloc(%d) bytes for xattr verify\n", rc,
XATTR_SIZE_MAX);
goto out;
}
value = malloc(XATTR_SIZE_MAX);
if (value == NULL) {
rc = ENOMEM;
ERROR("Error %d: malloc(%d) bytes for xattr value\n", rc,
XATTR_SIZE_MAX);
goto out;
}
verify_string = value_is_random ? "<random>" : verify_value;
value_string = value_is_random ? "<random>" : value;
fsize = PATH_MAX;
file = malloc(fsize);
if (file == NULL) {
rc = ENOMEM;
ERROR("Error %d: malloc(%d) bytes for file name\n", rc,
PATH_MAX);
goto out;
}
(void) gettimeofday(&start, NULL);
for (i = 1; i <= files; i++) {
if (snprintf(file, fsize, "%s/file-%d", path, i) >= fsize) {
rc = EINVAL;
ERROR("Error %d: path too long\n", rc);
goto out;
}
if (nth && ((i % nth) == 0))
fprintf(stdout, "getxattr: %s\n", file);
for (j = 1; j <= xattrs; j++) {
(void) sprintf(name, "user.%d", j);
rc = lgetxattr(file, name, value, XATTR_SIZE_MAX);
if (rc == -1) {
ERROR("Error %d: lgetxattr(%s, %s, ..., %d)\n",
errno, file, name, XATTR_SIZE_MAX);
goto out;
}
if (!verify)
continue;
sscanf(value, "size=%d [a-z]", &rnd_size);
shift = sprintf(verify_value, "size=%d ",
rnd_size);
memcpy(verify_value + shift, xattrbytes,
sizeof (xattrbytes) - shift);
if (rnd_size != rc ||
memcmp(verify_value, value, rnd_size)) {
ERROR("Error %d: verify failed\n "
"verify: %s\n value: %s\n", EINVAL,
verify_string, value_string);
rc = 1;
goto out;
}
}
}
(void) gettimeofday(&stop, NULL);
seconds = timeval_sub_seconds(&stop, &start);
fprintf(stdout, "getxattr: %f seconds %f getxattrs/second\n",
seconds, (files * xattrs) / seconds);
rc = post_hook("post");
out:
if (file)
free(file);
if (value)
free(value);
if (verify_value)
free(verify_value);
return (rc);
}
static int
unlink_files(void)
{
int i, rc;
char *file = NULL;
struct timeval start, stop;
double seconds;
size_t fsize;
fsize = PATH_MAX;
file = malloc(fsize);
if (file == NULL) {
rc = ENOMEM;
ERROR("Error %d: malloc(%d) bytes for file name\n",
rc, PATH_MAX);
goto out;
}
(void) gettimeofday(&start, NULL);
for (i = 1; i <= files; i++) {
if (snprintf(file, fsize, "%s/file-%d", path, i) >= fsize) {
rc = EINVAL;
ERROR("Error %d: path too long\n", rc);
goto out;
}
if (nth && ((i % nth) == 0))
fprintf(stdout, "unlink: %s\n", file);
rc = unlink(file);
if ((rc == -1) && (errno != ENOENT)) {
ERROR("Error %d: unlink(%s)\n", errno, file);
free(file);
return (errno);
}
}
(void) gettimeofday(&stop, NULL);
seconds = timeval_sub_seconds(&stop, &start);
fprintf(stdout, "unlink: %f seconds %f unlinks/second\n",
seconds, files / seconds);
rc = post_hook("post");
out:
if (file)
free(file);
return (rc);
}
int
main(int argc, char **argv)
{
int rc;
rc = parse_args(argc, argv);
if (rc)
return (rc);
if (value_is_random) {
size_t rndsz = sizeof (xattrbytes);
rc = get_random_bytes(xattrbytes, rndsz);
if (rc < rndsz) {
ERROR("Error %d: get_random_bytes() wanted %zd "
"got %d\n", errno, rndsz, rc);
return (rc);
}
} else {
memset(xattrbytes, 'x', sizeof (xattrbytes));
}
if (phase == PHASE_ALL || phase == PHASE_CREATE) {
rc = create_files();
if (rc)
return (rc);
}
if (phase == PHASE_ALL || phase == PHASE_SETXATTR) {
rc = setxattrs();
if (rc)
return (rc);
}
if (phase == PHASE_ALL || phase == PHASE_GETXATTR) {
rc = getxattrs();
if (rc)
return (rc);
}
if (!keep_files && (phase == PHASE_ALL || phase == PHASE_UNLINK)) {
rc = unlink_files();
if (rc)
return (rc);
}
return (0);
}