175 lines
4.1 KiB
C
175 lines
4.1 KiB
C
/* $NetBSD: t_basic.c,v 1.4 2017/01/13 21:30:40 christos Exp $ */
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#include <sys/types.h>
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#include <sys/mount.h>
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#include <atf-c.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <rump/rump.h>
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#include <rump/rump_syscalls.h>
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#include <miscfs/nullfs/null.h>
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#include <fs/tmpfs/tmpfs_args.h>
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#include "h_macros.h"
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ATF_TC(basic);
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ATF_TC_HEAD(basic, tc)
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{
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atf_tc_set_md_var(tc, "descr", "basic nullfs functionality");
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}
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#define MSTR "magic bus"
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static void
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xput_tfile(const char *path, const char *mstr)
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{
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int fd;
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fd = rump_sys_open(path, O_CREAT | O_RDWR, 0777);
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if (fd == -1)
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atf_tc_fail_errno("create %s", path);
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if (rump_sys_write(fd, MSTR, sizeof(MSTR)) != sizeof(MSTR))
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atf_tc_fail_errno("write to testfile");
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rump_sys_close(fd);
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}
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static int
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xread_tfile(const char *path, const char *mstr)
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{
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char buf[128];
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int fd;
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fd = rump_sys_open(path, O_RDONLY);
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if (fd == -1)
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return errno;
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if (rump_sys_read(fd, buf, sizeof(buf)) == -1)
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atf_tc_fail_errno("read tfile");
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rump_sys_close(fd);
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if (strcmp(buf, MSTR) == 0)
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return 0;
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return EPROGMISMATCH;
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}
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static void
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mountnull(const char *what, const char *mp, int flags)
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{
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struct null_args nargs;
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memset(&nargs, 0, sizeof(nargs));
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nargs.nulla_target = __UNCONST(what);
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if (rump_sys_mount(MOUNT_NULL, mp, flags, &nargs, sizeof(nargs)) == -1)
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atf_tc_fail_errno("could not mount nullfs");
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}
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ATF_TC_BODY(basic, tc)
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{
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struct tmpfs_args targs;
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struct stat sb;
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int error;
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rump_init();
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if (rump_sys_mkdir("/td1", 0777) == -1)
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atf_tc_fail_errno("mp1");
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if (rump_sys_mkdir("/td2", 0777) == -1)
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atf_tc_fail_errno("mp1");
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/* use tmpfs because rumpfs doesn't support regular files */
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memset(&targs, 0, sizeof(targs));
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targs.ta_version = TMPFS_ARGS_VERSION;
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targs.ta_root_mode = 0777;
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if (rump_sys_mount(MOUNT_TMPFS, "/td1", 0, &targs, sizeof(targs)) == -1)
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atf_tc_fail_errno("could not mount tmpfs td1");
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mountnull("/td1", "/td2", 0);
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/* test unnull -> null */
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xput_tfile("/td1/tensti", "jeppe");
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error = xread_tfile("/td2/tensti", "jeppe");
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if (error != 0)
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atf_tc_fail("null compare failed: %d (%s)",
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error, strerror(error));
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/* test null -> unnull */
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xput_tfile("/td2/kiekko", "keppi");
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error = xread_tfile("/td1/kiekko", "keppi");
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if (error != 0)
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atf_tc_fail("unnull compare failed: %d (%s)",
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error, strerror(error));
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/* test unnull -> null overwrite */
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xput_tfile("/td1/tensti", "se oolannin sota");
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error = xread_tfile("/td2/tensti", "se oolannin sota");
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if (error != 0)
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atf_tc_fail("unnull compare failed: %d (%s)",
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error, strerror(error));
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/* test that /td2 is unaffected in "real life" */
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if (rump_sys_unmount("/td2", 0) == -1)
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atf_tc_fail_errno("cannot unmount nullfs");
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if ((error = rump_sys_stat("/td2/tensti", &sb)) != -1
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|| errno != ENOENT) {
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atf_tc_fail("stat tensti should return ENOENT, got %d", error);
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}
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if ((error = rump_sys_stat("/td2/kiekko", &sb)) != -1
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|| errno != ENOENT) {
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atf_tc_fail("stat kiekko should return ENOENT, got %d", error);
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}
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/* done */
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}
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ATF_TC(twistymount);
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ATF_TC_HEAD(twistymount, tc)
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{
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/* this is expected to fail until the PR is fixed */
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atf_tc_set_md_var(tc, "descr", "\"recursive\" mounts deadlock"
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" (kern/43439)");
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}
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/*
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* Mapping to identifiers in kern/43439:
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* /td = /home/current/pkgsrc
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* /td/dist = /home/current/pkgsrc/distiles
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* /mp = /usr/pkgsrc
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* /mp/dist = /usr/pkgsrc/distfiles -- "created" by first null mount
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*/
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ATF_TC_BODY(twistymount, tc)
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{
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int mkd = 0;
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rump_init();
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if (rump_sys_mkdir("/td", 0777) == -1)
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atf_tc_fail_errno("mkdir %d", mkd++);
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if (rump_sys_mkdir("/td/dist", 0777) == -1)
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atf_tc_fail_errno("mkdir %d", mkd++);
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if (rump_sys_mkdir("/mp", 0777) == -1)
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atf_tc_fail_errno("mkdir %d", mkd++);
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/* MNT_RDONLY doesn't matter, but just for compat with the PR */
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mountnull("/td", "/mp", MNT_RDONLY);
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mountnull("/td/dist", "/mp/dist", 0);
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/* if we didn't get a locking-against-meself panic, we passed */
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, basic);
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ATF_TP_ADD_TC(tp, twistymount);
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return atf_no_error();
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}
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