From: Gao Xiang <xi...@kernel.org>
Just import it as an in-tree component for tests.
Signed-off-by: Gao Xiang <xi...@kernel.org>
---
changes since v1:
- Limit to the linux platform for now.
Makefile.am | 1 +
configure.ac | 15 +-
contrib/Makefile.am | 11 +
contrib/stress.c | 776 ++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 802 insertions(+), 1 deletion(-)
create mode 100644 contrib/Makefile.am
create mode 100644 contrib/stress.c
diff --git a/Makefile.am b/Makefile.am
index fc464e8..f8a967f 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -6,3 +6,4 @@ SUBDIRS = man lib mkfs dump fsck
if ENABLE_FUSE
SUBDIRS += fuse
endif
+SUBDIRS += contrib
diff --git a/configure.ac b/configure.ac
index 0a069c5..c922f73 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,6 +20,18 @@ AC_PROG_INSTALL
LT_INIT
+AC_CANONICAL_TARGET
+
+build_linux=no
+case "${target_os}" in
+ linux*)
+ build_linux=yes
+ ;;
+esac
+
+# OS-specific treatment
+AM_CONDITIONAL([OS_LINUX], [test "$build_linux" = "yes"])
+
# Test presence of pkg-config
AC_MSG_CHECKING([pkg-config m4 macros])
if test m4_ifdef([PKG_CHECK_MODULES], [yes], [no]) = "yes"; then
@@ -647,5 +659,6 @@ AC_CONFIG_FILES([Makefile
mkfs/Makefile
dump/Makefile
fuse/Makefile
- fsck/Makefile])
+ fsck/Makefile
+ contrib/Makefile])
AC_OUTPUT
diff --git a/contrib/Makefile.am b/contrib/Makefile.am
new file mode 100644
index 0000000..4eb7abe
--- /dev/null
+++ b/contrib/Makefile.am
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0+
+# Makefile.am
+
+AUTOMAKE_OPTIONS = foreign
+
+if OS_LINUX
+noinst_PROGRAMS = stress
+
+stress_CFLAGS = -Wall -I$(top_srcdir)/include
+stress_SOURCES = stress.c
+endif
diff --git a/contrib/stress.c b/contrib/stress.c
new file mode 100644
index 0000000..eedd9b9
--- /dev/null
+++ b/contrib/stress.c
@@ -0,0 +1,776 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * stress test for EROFS filesystem
+ *
+ * Copyright (C) 2019-2025 Gao Xiang <xi...@kernel.org>
+ */
+#define _GNU_SOURCE
+#include "erofs/defs.h"
+#include <errno.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#define MAX_CHUNKSIZE (2 * 1024 * 1024)
+#define MAX_SCAN_CHUNKSIZE (256 * 1024)
+
+bool superuser;
+unsigned int nprocs = 1, loops = 1, r_seed;
+unsigned int procid;
+volatile sig_atomic_t should_stop;
+
+enum {
+ DROP_PAGE_CACHE,
+ DROP_SLAB_CACHE,
+ COMPACT_MEMORY,
+};
+
+enum {
+ OP_GETDENTS,
+ OP_READLINK,
+ OP_SEQREAD_ALIGNED,
+ OP_SEQREAD_UNALIGNED,
+ OP_READ,
+ OP_FADVISE,
+ OP_DROP_CACHES,
+};
+
+struct opdesc {
+ char *name;
+ int (*func)(int op, unsigned int sn);
+ int freq;
+ bool requireroot;
+};
+
+extern struct opdesc ops[];
+
+static int drop_caches_f(int op, unsigned int sn)
+{
+ static const char *procfile[] = {
+ [DROP_PAGE_CACHE] = "/proc/sys/vm/drop_caches",
+ [DROP_SLAB_CACHE] = "/proc/sys/vm/drop_caches",
+ [COMPACT_MEMORY] = "/proc/sys/vm/compact_memory",
+ };
+ static const char *val[] = {
+ [DROP_PAGE_CACHE] = "1\n",
+ [DROP_SLAB_CACHE] = "2\n",
+ [COMPACT_MEMORY] = "1\n",
+ };
+ int mode = random() % ARRAY_SIZE(val);
+ FILE *f;
+ clock_t start;
+
+ if (!procfile[mode])
+ return -EINVAL;
+
+ printf("%d[%u]/%u %s: %s=%s", getpid(), procid, sn, __func__,
+ procfile[mode], val[mode]);
+
+ f = fopen(procfile[mode], "w");
+ if (!f)
+ return -errno;
+
+ start = clock();
+ while (clock() < start + CLOCKS_PER_SEC) {
+ fputs(val[mode], f);
+ (void)sched_yield();
+ }
+ fclose(f);
+ return 0;
+}
+
+struct fent {
+ char *subpath;
+ int fd, chkfd;
+};
+
+#define FT_DIR 0
+#define FT_DIRm (1 << FT_DIR)
+#define FT_REG 1
+#define FT_REGm (1 << FT_REG)
+#define FT_SYM 2
+#define FT_SYMm (1 << FT_SYM)
+#define FT_DEV 3
+#define FT_DEVm (1 << FT_DEV)
+#define FT_nft 4
+#define FT_ANYm ((1 << FT_nft) - 1)
+
+#define FLIST_SLOT_INCR 16
+
+struct flist {
+ int nfiles, nslots;
+ struct fent *fents;
+} flists[FT_nft];
+
+static struct fent *add_to_flist(int type, char *subpath)
+{
+ struct fent *fep;
+ struct flist *ftp;
+
+ ftp = &flists[type];
+ if (ftp->nfiles >= ftp->nslots) {
+ ftp->nslots += FLIST_SLOT_INCR;
+ ftp->fents = realloc(ftp->fents,
+ ftp->nslots * sizeof(struct fent));
+ if (!ftp->fents)
+ return NULL;
+ }
+ fep = &ftp->fents[ftp->nfiles++];
+ fep->subpath = strdup(subpath);
+ fep->fd = -1;
+ fep->chkfd = -1;
+ return fep;
+}
+
+static inline bool is_dot_dotdot(const char *name)
+{
+ if (name[0] != '.')
+ return false;
+
+ return name[1] == '\0' || (name[1] == '.' && name[2] == '\0');
+}
+
+static int walkdir(struct fent *ent)
+{
+ const char *dirpath = ent->subpath;
+ int ret = 0;
+ struct dirent *dp;
+ DIR *_dir;
+
+ _dir = opendir(dirpath);
+ if (!_dir) {
+ fprintf(stderr, "failed to opendir at %s: %s\n",
+ dirpath, strerror(errno));
+ return -errno;
+ }
+
+ while (1) {
+ char subpath[PATH_MAX];
+ struct stat st;
+
+ /*
+ * set errno to 0 before calling readdir() in order to
+ * distinguish end of stream and from an error.
+ */
+ errno = 0;
+ dp = readdir(_dir);
+ if (!dp)
+ break;
+
+ if (is_dot_dotdot(dp->d_name))
+ continue;
+
+ sprintf(subpath, "%s/%s", dirpath, dp->d_name);
+
+ if (lstat(subpath, &st))
+ continue;
+
+ switch (st.st_mode & S_IFMT) {
+ case S_IFDIR:
+ ent = add_to_flist(FT_DIR, subpath);
+ if (ent == NULL) {
+ ret = -ENOMEM;
+ goto err_closedir;
+ }
+ ret = walkdir(ent);
+ if (ret)
+ goto err_closedir;
+ break;
+ case S_IFREG:
+ ent = add_to_flist(FT_REG, subpath);
+ if (ent == NULL) {
+ ret = -ENOMEM;
+ goto err_closedir;
+ }
+ break;
+ case S_IFLNK:
+ ent = add_to_flist(FT_SYM, subpath);
+ if (ent == NULL) {
+ ret = -ENOMEM;
+ goto err_closedir;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ if (errno)
+ ret = -errno;
+err_closedir:
+ closedir(_dir);
+ return ret;
+}
+
+static int init_filetable(int testdir_fd)
+{
+ struct fent *fent;
+
+ fent = add_to_flist(FT_DIR, ".");
+ if (!fent)
+ return -ENOMEM;
+ if (fchdir(testdir_fd) < 0) {
+ perror("failed to fchdir");
+ return -errno;
+ }
+ return walkdir(fent);
+}
+
+static struct fent *getfent(int which, int r)
+{
+ int totalsum = 0; /* total number of matching files */
+ int partialsum = 0; /* partial sum of matching files */
+ struct flist *flp;
+ int i, x;
+
+ totalsum = 0;
+ for (i = 0, flp = flists; i < FT_nft; ++i, ++flp)
+ if (which & (1 << i))
+ totalsum += flp->nfiles;
+
+ if (!totalsum)
+ return NULL;
+
+ /*
+ * Now we have possible matches between 0..totalsum-1.
+ * And we use r to help us choose which one we want,
+ * which when bounded by totalsum becomes x.
+ */
+ x = (int)(r % totalsum);
+
+ for (i = 0, flp = flists; i < FT_nft; i++, flp++) {
+ if (which & (1 << i)) {
+ if (x < partialsum + flp->nfiles)
+ return &flp->fents[x - partialsum];
+ partialsum += flp->nfiles;
+ }
+ }
+ fprintf(stderr, "%s failure\n", __func__);
+ return NULL;
+}
+
+static int testdir_fd = -1, chkdir_fd = -1;
+
+static int __getdents_f(unsigned int sn, struct fent *fe)
+{
+ int dfd;
+ DIR *dir;
+
+ dfd = openat(testdir_fd, fe->subpath, O_DIRECTORY);
+ if (dfd < 0) {
+ fprintf(stderr, "%d[%u]/%u getdents_f: failed to open directory
%s",
+ getpid(), procid, sn, fe->subpath);
+ return -errno;
+ }
+
+ dir = fdopendir(dfd);
+ while (readdir64(dir) != NULL)
+ continue;
+ closedir(dir);
+ return 0;
+}
+
+static int getdents_f(int op, unsigned int sn)
+{
+ struct fent *fe;
+
+ fe = getfent(FT_DIRm, random());
+ if (!fe)
+ return 0;
+ printf("%d[%u]/%u %s: %s\n", getpid(), procid, sn, __func__,
+ fe->subpath);
+ return __getdents_f(sn, fe);
+}
+
+static int readlink_f(int op, unsigned int sn)
+{
+ char buf1[PATH_MAX], buf2[PATH_MAX];
+ struct fent *fe;
+ ssize_t sz;
+
+ fe = getfent(FT_SYMm, random());
+ if (!fe)
+ return 0;
+
+ printf("%d[%u]/%u %s: %s\n", getpid(), procid, sn, __func__,
+ fe->subpath);
+ sz = readlinkat(testdir_fd, fe->subpath, buf1, PATH_MAX - 1);
+ if (sz < 0) {
+ fprintf(stderr, "%d[%u]/%u %s: failed to readlinkat %s: %d",
+ getpid(), procid, sn, __func__, fe->subpath, errno);
+ return -errno;
+ }
+
+ if (chkdir_fd >= 0) {
+ if (sz != readlinkat(testdir_fd, fe->subpath, buf2,
+ PATH_MAX - 1)) {
+ fprintf(stderr, "%d[%u]/%u %s: symlink length mismatch
@%s\n",
+ getpid(), procid, sn, __func__, fe->subpath);
+ return -E2BIG;
+ }
+ if (memcmp(buf1, buf2, sz)) {
+ fprintf(stderr, "%d[%u]/%u %s: symlink mismatch @%s\n",
+ getpid(), procid, sn, __func__, fe->subpath);
+ return -EBADMSG;
+ }
+ }
+ return 0;
+}
+
+static int tryopen(unsigned int sn, const char *op, struct fent *fe)
+{
+ if (fe->fd < 0) {
+ fe->fd = openat(testdir_fd, fe->subpath, O_RDONLY);
+ if (fe->fd < 0) {
+ fprintf(stderr, "%d[%u]/%u %s: failed to open %s: %d",
+ getpid(), procid, sn, op, fe->subpath, errno);
+ return -errno;
+ }
+ /* use force_page_cache_readahead for every read request */
+ posix_fadvise(fe->fd, 0, 0, POSIX_FADV_RANDOM);
+ }
+
+ if (chkdir_fd >= 0 && fe->chkfd < 0)
+ fe->chkfd = openat(chkdir_fd, fe->subpath, O_RDONLY);
+ return 0;
+}
+
+static int fadvise_f(int op, unsigned int sn)
+{
+ struct fent *fe;
+ int ret;
+
+ fe = getfent(FT_REGm, random());
+ if (!fe)
+ return 0;
+ ret = tryopen(sn, __func__, fe);
+ if (ret)
+ return ret;
+
+ printf("%d[%u]/%u %s: %s\n", getpid(), procid, sn,
+ __func__, fe->subpath);
+ ret = posix_fadvise(fe->fd, 0, 0, POSIX_FADV_DONTNEED);
+ if (!ret)
+ return 0;
+ fprintf(stderr, "%d(%u)/%u %s: posix_fadvise %s failed %d\n",
+ getpid(), procid, sn, __func__, fe->subpath, errno);
+ return -errno;
+}
+
+static int __read_f(unsigned int sn, struct fent *fe, uint64_t filesize)
+{
+ static char buf[MAX_CHUNKSIZE], chkbuf[MAX_CHUNKSIZE];
+ uint64_t lr, off, len, trimmed;
+ size_t nread, nread2;
+
+ lr = ((uint64_t) random() << 32) + random();
+ off = lr % filesize;
+ len = (random() % MAX_CHUNKSIZE) + 1;
+ trimmed = len;
+
+ if (off + len > filesize) {
+ uint64_t a = filesize - off + 16 * getpagesize();
+
+ if (len > a)
+ len %= a;
+ trimmed = len <= filesize - off ? len : filesize - off;
+ }
+
+ printf("%d[%u]/%u read_f: %llu bytes @ %llu\n", getpid(), procid, sn,
+ len | 0ULL, off | 0ULL);
+ nread = pread64(fe->fd, buf, len, off);
+ if (nread != trimmed) {
+ fprintf(stderr, "%d[%u]/%u read_f: failed to read %llu bytes @
%llu of %s\n",
+ getpid(), procid, sn, len | 0ULL, off | 0ULL,
+ fe->subpath);
+ return -errno;
+ }
+
+ if (fe->chkfd < 0)
+ return 0;
+
+ nread2 = pread64(fe->chkfd, chkbuf, len, off);
+ if (nread2 <= 0) {
+ fprintf(stderr, "%d[%u]/%u read_f: failed to check %llu bytes @
%llu of %s\n",
+ getpid(), procid, sn, len | 0ULL, off | 0ULL,
+ fe->subpath);
+ return -errno;
+ }
+
+ if (nread != nread2) {
+ fprintf(stderr, "%d[%u]/%u read_f: size mismatch %llu bytes @
%llu of %s\n",
+ getpid(), procid, sn, len | 0ULL, off | 0ULL,
+ fe->subpath);
+ return -EFBIG;
+ }
+
+ if (memcmp(buf, chkbuf, nread)) {
+ fprintf(stderr, "%d[%u]/%u read_f: data mismatch %llu bytes @
%llu of %s\n",
+ getpid(), procid, sn, len | 0ULL, off | 0ULL,
+ fe->subpath);
+ return -EBADMSG;
+ }
+ return 0;
+}
+
+static int read_f(int op, unsigned int sn)
+{
+ struct fent *fe;
+ ssize_t fsz;
+ int ret;
+
+ fe = getfent(FT_REGm, random());
+ if (!fe)
+ return 0;
+ ret = tryopen(sn, __func__, fe);
+ if (ret)
+ return ret;
+
+ fsz = lseek64(fe->fd, 0, SEEK_END);
+ if (fsz <= 0) {
+ if (!fsz) {
+ printf("%d[%u]/%u %s: zero size @ %s\n",
+ getpid(), procid, sn, __func__, fe->subpath);
+ return 0;
+ }
+ fprintf(stderr, "%d[%u]/%u %s: lseek64 %s failed %d\n",
+ getpid(), procid, sn, __func__, fe->subpath, errno);
+ return -errno;
+ }
+ return __read_f(sn, fe, fsz);
+}
+
+static int __doscan_f(unsigned int sn, const char *op, struct fent *fe,
+ uint64_t filesize, uint64_t chunksize)
+{
+ static char buf[MAX_SCAN_CHUNKSIZE], chkbuf[MAX_SCAN_CHUNKSIZE];
+ uint64_t pos;
+
+ printf("%d[%u]/%u %s: filesize %llu, chunksize %llu @ %s\n",
+ getpid(), procid, sn, op, (unsigned long long)filesize,
+ (unsigned long long)chunksize, fe->subpath);
+
+ for (pos = 0; pos < filesize; pos += chunksize) {
+ ssize_t nread, nread2;
+
+ nread = pread64(fe->fd, buf, chunksize, pos);
+
+ if (nread <= 0)
+ return -errno;
+
+ if (nread < chunksize && nread != filesize - pos)
+ return -ERANGE;
+
+ if (fe->chkfd < 0)
+ continue;
+
+ nread2 = pread64(fe->chkfd, chkbuf, chunksize, pos);
+ if (nread2 <= 0)
+ return -errno;
+
+ if (nread != nread2)
+ return -EFBIG;
+
+ if (memcmp(buf, chkbuf, nread)) {
+ fprintf(stderr, "%d[%u]/%u %s: %llu bytes mismatch @
%llu of %s\n",
+ getpid(), procid, sn, op, chunksize | 0ULL,
+ pos | 0ULL, fe->subpath);
+ return -EBADMSG;
+ }
+ }
+ return 0;
+}
+
+static int doscan_f(int op, unsigned int sn)
+{
+ struct fent *fe;
+ uint64_t chunksize;
+ ssize_t fsz;
+ int ret;
+
+ fe = getfent(FT_REGm, random());
+ if (!fe)
+ return 0;
+ ret = tryopen(sn, __func__, fe);
+ if (ret)
+ return ret;
+
+ fsz = lseek64(fe->fd, 0, SEEK_END);
+ if (fsz <= 0) {
+ if (!fsz) {
+ printf("%d[%u]/%u %s: zero size @ %s\n",
+ getpid(), procid, sn, __func__, fe->subpath);
+ return 0;
+ }
+ fprintf(stderr, "%d[%u]/%u %s: lseek64 %s failed %d\n",
+ getpid(), procid, sn, __func__, fe->subpath, errno);
+ return -errno;
+ }
+ chunksize = ((uint64_t)random() * random() % MAX_SCAN_CHUNKSIZE) + 1;
+ return __doscan_f(sn, __func__, fe, fsz, chunksize);
+}
+
+static int doscan_aligned_f(int op, unsigned int sn)
+{
+ const int psz = getpagesize();
+ struct fent *fe;
+ uint64_t chunksize, maxchunksize;
+ ssize_t fsz;
+ int ret;
+
+ fe = getfent(FT_REGm, random());
+ if (!fe)
+ return 0;
+ ret = tryopen(sn, __func__, fe);
+ if (ret)
+ return ret;
+ fsz = lseek64(fe->fd, 0, SEEK_END);
+ if (fsz <= psz) {
+ if (fsz >= 0) {
+ printf("%d[%u]/%u %s: size too small %lld @ %s\n",
+ getpid(), procid, sn, __func__, fsz | 0LL,
+ fe->subpath);
+ return 0;
+ }
+ fprintf(stderr, "%d[%u]/%u %s: lseek64 %s failed %d\n",
+ getpid(), procid, sn, __func__, fe->subpath, errno);
+ return -errno;
+ }
+
+ maxchunksize = (fsz - psz > MAX_SCAN_CHUNKSIZE ?
+ MAX_SCAN_CHUNKSIZE : fsz - psz);
+ chunksize = random() * random() % maxchunksize;
+ chunksize = (((chunksize - 1) / psz) + 1) * psz;
+ if (!chunksize)
+ chunksize = psz;
+ return __doscan_f(sn, __func__, fe, fsz, chunksize);
+}
+
+void randomdelay(void)
+{
+ uint64_t lr = ((uint64_t) random() << 32) + random();
+ clock_t start;
+ clock_t length = (lr % CLOCKS_PER_SEC) >> 1;
+
+ start = clock();
+ while (clock() < start + length)
+ (void)sched_yield();
+}
+
+void sg_handler(int signum)
+{
+ switch (signum) {
+ case SIGTERM:
+ should_stop = 1;
+ break;
+ default:
+ break;
+ }
+}
+
+struct opdesc ops[] = {
+ [OP_GETDENTS] = { "getdents", getdents_f, 5, false },
+ [OP_READLINK] = { "readlink", readlink_f, 5, false },
+ [OP_SEQREAD_ALIGNED] = { "readscan_aligned", doscan_aligned_f, 10,
false },
+ [OP_SEQREAD_UNALIGNED] = { "readscan_unaligned", doscan_f, 10, false },
+ [OP_READ] = { "read", read_f, 30, false},
+ [OP_FADVISE] = { "fadvise", fadvise_f, 3, false},
+ [OP_DROP_CACHES] = { "drop_caches", drop_caches_f, 1, true},
+};
+
+static int parse_options(int argc, char *argv[])
+{
+ char *testdir, *chkdir;
+ int opt;
+
+ while ((opt = getopt(argc, argv, "l:p:s:")) != -1) {
+ switch (opt) {
+ case 'l':
+ loops = atoi(optarg);
+ if (loops < 0) {
+ fprintf(stderr, "invalid loops %d\n", loops);
+ return -EINVAL;
+ }
+ break;
+ case 'p':
+ nprocs = atoi(optarg);
+ if (nprocs < 0) {
+ fprintf(stderr, "invalid workers %d\n",
+ nprocs);
+ return -EINVAL;
+ }
+ break;
+ case 's':
+ r_seed = atoi(optarg);
+ if (r_seed < 0) {
+ fprintf(stderr, "invalid random seed %d\n",
+ r_seed);
+ return -EINVAL;
+ }
+ break;
+ default: /* '?' */
+ return -EINVAL;
+ }
+ }
+
+ if (optind >= argc)
+ return -EINVAL;
+
+ testdir = argv[optind++];
+ if (testdir) {
+ testdir_fd = open(testdir, O_PATH);
+ if (testdir_fd < 0) {
+ fprintf(stderr, "cannot open testdir fd @ %s: %s\n",
+ testdir, strerror(errno));
+ return 1;
+ }
+ }
+
+ if (argc > optind) {
+ chkdir = argv[optind++];
+
+ chkdir_fd = open(chkdir, O_PATH);
+ if (chkdir_fd < 0) {
+ fprintf(stderr, "cannot open checkdir fd @ %s: %s\n",
+ chkdir, strerror(errno));
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static void usage(void)
+{
+ fputs("usage: [options] TESTDIR [COMPRDIR]\n\n"
+ "Stress test for EROFS filesystem, where TESTDIR is the directory
to test and\n"
+ "COMPRDIR (optional) serves as a directory for data comparison.\n"
+ " -l# Number of times each worker should loop (0 for
infinite, default: 1)\n"
+ " -p# Number of parallel worker processes (default: 1)\n"
+ " -s# Seed for random generator (default: random)\n",
+ stderr);
+}
+
+unsigned int *freq_table;
+int freq_table_size;
+
+static void doproc(void)
+{
+ unsigned int sn;
+
+ srandom(r_seed + procid);
+ for (sn = 0; !should_stop && (!loops || sn < loops); ++sn) {
+ int op, err;
+
+ op = freq_table[random() % freq_table_size];
+ if (op >= ARRAY_SIZE(ops)) {
+ fprintf(stderr, "%d[%u]/%u %s: internal error\n",
+ getpid(), procid, sn, __func__);
+ abort();
+ }
+
+ if (sn && op != OP_DROP_CACHES)
+ randomdelay();
+ err = ops[op].func(op, sn);
+ if (err) {
+ fprintf(stderr, "%d[%u]/%u test failed (%d): %s\n",
+ getpid(), procid, sn, err, strerror(-err));
+ exit(1);
+ }
+ }
+}
+
+static void make_freq_table(void)
+{
+ int f, i;
+ struct opdesc *p;
+
+ for (p = ops, f = 0; p < ops + ARRAY_SIZE(ops); p++) {
+ if (!superuser && p->requireroot)
+ continue;
+ f += p->freq;
+ }
+ freq_table = malloc(f * sizeof(*freq_table));
+ freq_table_size = f;
+ for (p = ops, i = 0; p < ops + ARRAY_SIZE(ops); p++) {
+ if (!superuser && p->requireroot)
+ continue;
+ for (f = 0; f < p->freq; f++, i++)
+ freq_table[i] = p - ops;
+ }
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int i;
+ int err, stat;
+ struct sigaction action;
+
+ err = parse_options(argc, argv);
+ if (err) {
+ if (err == -EINVAL)
+ usage();
+ return 1;
+ }
+
+ err = init_filetable(testdir_fd);
+ if (err) {
+ fprintf(stderr, "cannot initialize file table: %s\n",
+ strerror(errno));
+ return 1;
+ }
+
+ superuser = (geteuid() == 0);
+ setpgid(0, 0);
+ action.sa_handler = sg_handler;
+ action.sa_flags = 0;
+
+ if (sigaction(SIGTERM, &action, 0)) {
+ perror("sigaction failed");
+ exit(1);
+ }
+
+ if (!r_seed)
+ r_seed = (time(NULL) ? : 1);
+ make_freq_table();
+
+ /* spawn nprocs processes */
+ for (i = 0; i < nprocs; ++i) {
+ if (fork() == 0) {
+ action.sa_handler = SIG_DFL;
+ sigemptyset(&action.sa_mask);
+ if (sigaction(SIGTERM, &action, 0)) {
+ perror("sigaction failed");
+ exit(1);
+ }
+ procid = i;
+ doproc();
+ return 0;
+ }
+ }
+
+ err = 0;
+ while (wait(&stat) > 0 && !should_stop) {
+ if (!WIFEXITED(stat)) {
+ err = 1;
+ break;
+ }
+
+ if (WEXITSTATUS(stat)) {
+ err = WEXITSTATUS(stat);
+ break;
+ }
+ }
+ action.sa_flags = SA_RESTART;
+ sigaction(SIGTERM, &action, 0);
+ kill(-getpid(), SIGTERM);
+ /* wait until all children exit */
+ while (wait(&stat) > 0)
+ continue;
+ return err;
+}
--
2.43.5
