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