minix/tests/fs/common/fstest_puffs.c

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/* $NetBSD: fstest_puffs.c,v 1.11 2013/09/09 19:47:38 pooka Exp $ */
/*
* Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <sys/statvfs.h>
#include <sys/wait.h>
#include <assert.h>
#include <atf-c.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <puffs.h>
#include <puffsdump.h>
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <rump/rump.h>
#include <rump/rump_syscalls.h>
#include "h_fsmacros.h"
#define BUFSIZE (128*1024)
#define DTFS_DUMP "-o","dump"
static bool mayquit = false;
static ssize_t
xread(int fd, void *vp, size_t n)
{
size_t left;
left = n;
do {
ssize_t ssz;
ssz = read(fd, vp, left);
if (ssz == -1) {
return ssz;
}
left -= ssz;
vp = (char *)vp + ssz;
} while (left > 0);
return n;
}
static ssize_t
xwrite(int fd, const void *vp, size_t n)
{
size_t left;
left = n;
do {
ssize_t ssz;
ssz = write(fd, vp, left);
if (ssz == -1) {
return ssz;
}
left -= ssz;
vp = (const char *)vp + ssz;
} while (left > 0);
return n;
}
/*
* Threads which shovel data between comfd and /dev/puffs.
* (cannot use polling since fd's are in different namespaces)
*/
static void *
readshovel(void *arg)
{
struct putter_hdr *phdr;
struct puffs_req *preq;
struct puffstestargs *args = arg;
char buf[BUFSIZE];
ssize_t n;
int comfd, puffsfd;
comfd = args->pta_servfd;
puffsfd = args->pta_rumpfd;
phdr = (void *)buf;
preq = (void *)buf;
rump_pub_lwproc_newlwp(1);
for (;;) {
n = rump_sys_read(puffsfd, buf, sizeof(*phdr));
if (n <= 0) {
fprintf(stderr, "readshovel r1 %zd / %d\n", n, errno);
break;
}
assert(phdr->pth_framelen < BUFSIZE);
n = rump_sys_read(puffsfd, buf+sizeof(*phdr),
phdr->pth_framelen - sizeof(*phdr));
if (n <= 0) {
fprintf(stderr, "readshovel r2 %zd / %d\n", n, errno);
break;
}
/* Analyze request */
if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VFS) {
assert(preq->preq_optype < PUFFS_VFS_MAX);
args->pta_vfs_toserv_ops[preq->preq_optype]++;
} else if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VN) {
assert(preq->preq_optype < PUFFS_VN_MAX);
args->pta_vn_toserv_ops[preq->preq_optype]++;
}
n = phdr->pth_framelen;
if (xwrite(comfd, buf, n) != n) {
fprintf(stderr, "readshovel write %zd / %d\n", n, errno);
break;
}
}
if (n != 0 && mayquit == false)
abort();
return NULL;
}
static void *
writeshovel(void *arg)
{
struct puffstestargs *args = arg;
struct putter_hdr *phdr;
struct puffs_req *preq;
char buf[BUFSIZE];
size_t toread;
ssize_t n;
int comfd, puffsfd;
rump_pub_lwproc_newlwp(1);
comfd = args->pta_servfd;
puffsfd = args->pta_rumpfd;
phdr = (struct putter_hdr *)buf;
preq = (void *)buf;
for (;;) {
uint64_t off;
/*
* Need to write everything to the "kernel" in one chunk,
* so make sure we have it here.
*/
off = 0;
toread = sizeof(struct putter_hdr);
assert(toread < BUFSIZE);
do {
n = xread(comfd, buf+off, toread);
if (n <= 0) {
fprintf(stderr, "writeshovel read %zd / %d\n",
n, errno);
goto out;
}
off += n;
if (off >= sizeof(struct putter_hdr))
toread = phdr->pth_framelen - off;
else
toread = off - sizeof(struct putter_hdr);
} while (toread);
if (__predict_false(
PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VFS
&& preq->preq_optype == PUFFS_VFS_UNMOUNT)) {
if (preq->preq_rv == 0)
mayquit = true;
}
n = rump_sys_write(puffsfd, buf, phdr->pth_framelen);
if ((size_t)n != phdr->pth_framelen) {
fprintf(stderr, "writeshovel wr %zd / %d\n", n, errno);
break;
}
}
out:
if (n != 0)
abort();
return NULL;
}
static void
rumpshovels(struct puffstestargs *args)
{
pthread_t pt;
int rv;
if ((rv = rump_init()) == -1)
err(1, "rump_init");
if (pthread_create(&pt, NULL, readshovel, args) == -1)
err(1, "read shovel");
pthread_detach(pt);
if (pthread_create(&pt, NULL, writeshovel, args) == -1)
err(1, "write shovel");
pthread_detach(pt);
}
static void
childfail(int sign)
{
atf_tc_fail("child died"); /* almost signal-safe */
}
struct puffstestargs *theargs; /* XXX */
/* XXX: we don't support size */
static int
donewfs(const atf_tc_t *tc, void **argp,
const char *image, off_t size, void *fspriv, char **theargv)
{
struct puffstestargs *args;
pid_t childpid;
int *pflags;
char comfd[16];
int sv[2];
int mntflags;
size_t len;
ssize_t n;
*argp = NULL;
args = malloc(sizeof(*args));
if (args == NULL)
return errno;
memset(args, 0, sizeof(*args));
pflags = &args->pta_pflags;
/* Create sucketpair for communication with the real file server */
if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sv) == -1)
return errno;
signal(SIGCHLD, childfail);
switch ((childpid = fork())) {
case 0:
close(sv[1]);
snprintf(comfd, sizeof(sv[0]), "%d", sv[0]);
if (setenv("PUFFS_COMFD", comfd, 1) == -1)
return errno;
if (execvp(theargv[0], theargv) == -1)
return errno;
case -1:
return errno;
default:
close(sv[0]);
break;
}
/* read args */
if ((n = xread(sv[1], &len, sizeof(len))) != sizeof(len))
err(1, "mp 1 %zd", n);
if (len > MAXPATHLEN)
err(1, "mntpath > MAXPATHLEN");
if ((size_t)xread(sv[1], args->pta_dir, len) != len)
err(1, "mp 2");
if (xread(sv[1], &len, sizeof(len)) != sizeof(len))
err(1, "fn 1");
if (len > MAXPATHLEN)
err(1, "devpath > MAXPATHLEN");
if ((size_t)xread(sv[1], args->pta_dev, len) != len)
err(1, "fn 2");
if (xread(sv[1], &mntflags, sizeof(mntflags)) != sizeof(mntflags))
err(1, "mntflags");
if (xread(sv[1], &args->pta_pargslen, sizeof(args->pta_pargslen))
!= sizeof(args->pta_pargslen))
err(1, "puffstest_args len");
args->pta_pargs = malloc(args->pta_pargslen);
if (args->pta_pargs == NULL)
err(1, "malloc");
if (xread(sv[1], args->pta_pargs, args->pta_pargslen)
!= (ssize_t)args->pta_pargslen)
err(1, "puffstest_args");
if (xread(sv[1], pflags, sizeof(*pflags)) != sizeof(*pflags))
err(1, "pflags");
args->pta_childpid = childpid;
args->pta_servfd = sv[1];
strlcpy(args->pta_dev, image, sizeof(args->pta_dev));
*argp = theargs = args;
return 0;
}
int
puffs_fstest_newfs(const atf_tc_t *tc, void **argp,
const char *image, off_t size, void *fspriv)
{
char dtfs_path[MAXPATHLEN];
char *dtfsargv[6];
char **theargv;
/* build dtfs exec path from atf test dir */
sprintf(dtfs_path, "%s/../puffs/h_dtfs/h_dtfs",
atf_tc_get_config_var(tc, "srcdir"));
if (fspriv) {
theargv = fspriv;
theargv[0] = dtfs_path;
} else {
dtfsargv[0] = dtfs_path;
dtfsargv[1] = __UNCONST("-i");
dtfsargv[2] = __UNCONST("-s");
dtfsargv[3] = __UNCONST("dtfs");
dtfsargv[4] = __UNCONST("fictional");
dtfsargv[5] = NULL;
theargv = dtfsargv;
}
return donewfs(tc, argp, image, size, fspriv, theargv);
}
int
p2k_ffs_fstest_newfs(const atf_tc_t *tc, void **argp,
const char *image, off_t size, void *fspriv)
{
char *rumpffs_argv[5];
int rv;
rump_init();
if ((rv = ffs_fstest_newfs(tc, argp, image, size, fspriv)) != 0)
return rv;
if (mkdir("p2kffsfake", 0777) == -1 && errno != EEXIST)
return errno;
setenv("P2K_NODETACH", "1", 1);
rumpffs_argv[0] = __UNCONST("rump_ffs");
rumpffs_argv[1] = __UNCONST(image);
rumpffs_argv[2] = __UNCONST("p2kffsfake"); /* NOTUSED */
rumpffs_argv[3] = NULL;
if ((rv = donewfs(tc, argp, image, size, fspriv, rumpffs_argv)) != 0)
ffs_fstest_delfs(tc, argp);
return rv;
}
int
puffs_fstest_mount(const atf_tc_t *tc, void *arg, const char *path, int flags)
{
struct puffstestargs *pargs = arg;
int fd;
rump_init();
fd = rump_sys_open("/dev/puffs", O_RDWR);
if (fd == -1)
return fd;
if (rump_sys_mkdir(path, 0777) == -1)
return -1;
if (rump_sys_mount(MOUNT_PUFFS, path, flags,
pargs->pta_pargs, pargs->pta_pargslen) == -1) {
/* apply "to kill a child" to avoid atf hang (kludge) */
kill(pargs->pta_childpid, SIGKILL);
return -1;
}
pargs->pta_rumpfd = fd;
rumpshovels(pargs);
return 0;
}
__strong_alias(p2k_ffs_fstest_mount,puffs_fstest_mount);
int
puffs_fstest_delfs(const atf_tc_t *tc, void *arg)
{
/* useless ... */
return 0;
}
int
p2k_ffs_fstest_delfs(const atf_tc_t *tc, void *arg)
{
return ffs_fstest_delfs(tc, arg);
}
int
puffs_fstest_unmount(const atf_tc_t *tc, const char *path, int flags)
{
struct puffstestargs *pargs = theargs;
int status;
int rv;
/* ok, child might exit here */
signal(SIGCHLD, SIG_IGN);
rv = rump_sys_unmount(path, flags);
if (rv)
return rv;
if ((rv = rump_sys_rmdir(path)) != 0)
return rv;
if (waitpid(pargs->pta_childpid, &status, WNOHANG) > 0)
return 0;
kill(pargs->pta_childpid, SIGTERM);
usleep(10);
if (waitpid(pargs->pta_childpid, &status, WNOHANG) > 0)
return 0;
kill(pargs->pta_childpid, SIGKILL);
usleep(500);
wait(&status);
rmdir("p2kffsfake");
return 0;
}
__strong_alias(p2k_ffs_fstest_unmount,puffs_fstest_unmount);