1 /* $NetBSD: t_basic.c,v 1.4 2017/01/13 21:30:40 christos Exp $ */
2
3 #include <sys/types.h>
4 #include <sys/mount.h>
5
6 #include <atf-c.h>
7 #include <err.h>
8 #include <errno.h>
9 #include <fcntl.h>
10 #include <stdio.h>
11 #include <unistd.h>
12 #include <string.h>
13 #include <stdlib.h>
14
15 #include <rump/rump.h>
16 #include <rump/rump_syscalls.h>
17
18 #include <miscfs/nullfs/null.h>
19 #include <fs/tmpfs/tmpfs_args.h>
20
21 #include "h_macros.h"
22
23 ATF_TC(basic);
ATF_TC_HEAD(basic,tc)24 ATF_TC_HEAD(basic, tc)
25 {
26 atf_tc_set_md_var(tc, "descr", "basic nullfs functionality");
27 }
28
29 #define MSTR "magic bus"
30
31 static void
xput_tfile(const char * path,const char * mstr)32 xput_tfile(const char *path, const char *mstr)
33 {
34 int fd;
35
36 fd = rump_sys_open(path, O_CREAT | O_RDWR, 0777);
37 if (fd == -1)
38 atf_tc_fail_errno("create %s", path);
39 if (rump_sys_write(fd, MSTR, sizeof(MSTR)) != sizeof(MSTR))
40 atf_tc_fail_errno("write to testfile");
41 rump_sys_close(fd);
42 }
43
44 static int
xread_tfile(const char * path,const char * mstr)45 xread_tfile(const char *path, const char *mstr)
46 {
47 char buf[128];
48 int fd;
49
50 fd = rump_sys_open(path, O_RDONLY);
51 if (fd == -1)
52 return errno;
53 if (rump_sys_read(fd, buf, sizeof(buf)) == -1)
54 atf_tc_fail_errno("read tfile");
55 rump_sys_close(fd);
56 if (strcmp(buf, MSTR) == 0)
57 return 0;
58 return EPROGMISMATCH;
59 }
60
61 static void
mountnull(const char * what,const char * mp,int flags)62 mountnull(const char *what, const char *mp, int flags)
63 {
64 struct null_args nargs;
65
66 memset(&nargs, 0, sizeof(nargs));
67 nargs.nulla_target = __UNCONST(what);
68 if (rump_sys_mount(MOUNT_NULL, mp, flags, &nargs, sizeof(nargs)) == -1)
69 atf_tc_fail_errno("could not mount nullfs");
70
71 }
72
ATF_TC_BODY(basic,tc)73 ATF_TC_BODY(basic, tc)
74 {
75 struct tmpfs_args targs;
76 struct stat sb;
77 int error;
78
79 rump_init();
80 if (rump_sys_mkdir("/td1", 0777) == -1)
81 atf_tc_fail_errno("mp1");
82 if (rump_sys_mkdir("/td2", 0777) == -1)
83 atf_tc_fail_errno("mp1");
84
85 /* use tmpfs because rumpfs doesn't support regular files */
86 memset(&targs, 0, sizeof(targs));
87 targs.ta_version = TMPFS_ARGS_VERSION;
88 targs.ta_root_mode = 0777;
89 if (rump_sys_mount(MOUNT_TMPFS, "/td1", 0, &targs, sizeof(targs)) == -1)
90 atf_tc_fail_errno("could not mount tmpfs td1");
91
92 mountnull("/td1", "/td2", 0);
93
94 /* test unnull -> null */
95 xput_tfile("/td1/tensti", "jeppe");
96 error = xread_tfile("/td2/tensti", "jeppe");
97 if (error != 0)
98 atf_tc_fail("null compare failed: %d (%s)",
99 error, strerror(error));
100
101 /* test null -> unnull */
102 xput_tfile("/td2/kiekko", "keppi");
103 error = xread_tfile("/td1/kiekko", "keppi");
104 if (error != 0)
105 atf_tc_fail("unnull compare failed: %d (%s)",
106 error, strerror(error));
107
108 /* test unnull -> null overwrite */
109 xput_tfile("/td1/tensti", "se oolannin sota");
110 error = xread_tfile("/td2/tensti", "se oolannin sota");
111 if (error != 0)
112 atf_tc_fail("unnull compare failed: %d (%s)",
113 error, strerror(error));
114
115 /* test that /td2 is unaffected in "real life" */
116 if (rump_sys_unmount("/td2", 0) == -1)
117 atf_tc_fail_errno("cannot unmount nullfs");
118 if ((error = rump_sys_stat("/td2/tensti", &sb)) != -1
119 || errno != ENOENT) {
120 atf_tc_fail("stat tensti should return ENOENT, got %d", error);
121 }
122 if ((error = rump_sys_stat("/td2/kiekko", &sb)) != -1
123 || errno != ENOENT) {
124 atf_tc_fail("stat kiekko should return ENOENT, got %d", error);
125 }
126
127 /* done */
128 }
129
130 ATF_TC(twistymount);
ATF_TC_HEAD(twistymount,tc)131 ATF_TC_HEAD(twistymount, tc)
132 {
133
134 /* this is expected to fail until the PR is fixed */
135 atf_tc_set_md_var(tc, "descr", "\"recursive\" mounts deadlock"
136 " (kern/43439)");
137 }
138
139 /*
140 * Mapping to identifiers in kern/43439:
141 * /td = /home/current/pkgsrc
142 * /td/dist = /home/current/pkgsrc/distiles
143 * /mp = /usr/pkgsrc
144 * /mp/dist = /usr/pkgsrc/distfiles -- "created" by first null mount
145 */
146
ATF_TC_BODY(twistymount,tc)147 ATF_TC_BODY(twistymount, tc)
148 {
149 int mkd = 0;
150
151 rump_init();
152
153 if (rump_sys_mkdir("/td", 0777) == -1)
154 atf_tc_fail_errno("mkdir %d", mkd++);
155 if (rump_sys_mkdir("/td/dist", 0777) == -1)
156 atf_tc_fail_errno("mkdir %d", mkd++);
157 if (rump_sys_mkdir("/mp", 0777) == -1)
158 atf_tc_fail_errno("mkdir %d", mkd++);
159
160 /* MNT_RDONLY doesn't matter, but just for compat with the PR */
161 mountnull("/td", "/mp", MNT_RDONLY);
162 mountnull("/td/dist", "/mp/dist", 0);
163
164 /* if we didn't get a locking-against-meself panic, we passed */
165 }
166
ATF_TP_ADD_TCS(tp)167 ATF_TP_ADD_TCS(tp)
168 {
169
170 ATF_TP_ADD_TC(tp, basic);
171 ATF_TP_ADD_TC(tp, twistymount);
172
173 return atf_no_error();
174 }
175