1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
#include "private.h"
#include <unistd.h>
#include "lock-tracking.h"
static ssize_t pwrite_check(int fd, const void *buf, size_t count, off_t offset);
static ssize_t write_check(int fd, const void *buf, size_t count);
static int ftruncate_check(int fd, off_t length);
#define pwrite pwrite_check
#define write write_check
#define fcntl fcntl_with_lockcheck
#define ftruncate ftruncate_check
#include "ntdb-source.h"
#include "tap-interface.h"
#include <stdlib.h>
#include <stdbool.h>
#include <stdarg.h>
#include "external-agent.h"
#include "logging.h"
static struct agent *agent;
static bool opened;
static int errors = 0;
#define TEST_DBNAME "run-56-open-during-transaction.ntdb"
#undef write
#undef pwrite
#undef fcntl
#undef ftruncate
static bool is_same(const char *snapshot, const char *latest, off_t len)
{
unsigned i;
for (i = 0; i < len; i++) {
if (snapshot[i] != latest[i])
return false;
}
return true;
}
static bool compare_file(int fd, const char *snapshot, off_t snapshot_len)
{
char *contents;
bool ret;
/* over-length read serves as length check. */
contents = malloc(snapshot_len+1);
ret = pread(fd, contents, snapshot_len+1, 0) == snapshot_len
&& is_same(snapshot, contents, snapshot_len);
free(contents);
return ret;
}
static void check_file_intact(int fd)
{
enum agent_return ret;
struct stat st;
char *contents;
fstat(fd, &st);
contents = malloc(st.st_size);
if (pread(fd, contents, st.st_size, 0) != st.st_size) {
diag("Read fail");
errors++;
return;
}
/* Ask agent to open file. */
ret = external_agent_operation(agent, OPEN, TEST_DBNAME);
/* It's OK to open it, but it must not have changed! */
if (!compare_file(fd, contents, st.st_size)) {
diag("Agent changed file after opening %s",
agent_return_name(ret));
errors++;
}
if (ret == SUCCESS) {
ret = external_agent_operation(agent, CLOSE, NULL);
if (ret != SUCCESS) {
diag("Agent failed to close ntdb: %s",
agent_return_name(ret));
errors++;
}
} else if (ret != WOULD_HAVE_BLOCKED) {
diag("Agent opening file gave %s",
agent_return_name(ret));
errors++;
}
free(contents);
}
static void after_unlock(int fd)
{
if (opened)
check_file_intact(fd);
}
static ssize_t pwrite_check(int fd,
const void *buf, size_t count, off_t offset)
{
if (opened)
check_file_intact(fd);
return pwrite(fd, buf, count, offset);
}
static ssize_t write_check(int fd, const void *buf, size_t count)
{
if (opened)
check_file_intact(fd);
return write(fd, buf, count);
}
static int ftruncate_check(int fd, off_t length)
{
if (opened)
check_file_intact(fd);
return ftruncate(fd, length);
}
int main(int argc, char *argv[])
{
const int flags[] = { NTDB_DEFAULT, NTDB_NOMMAP,
NTDB_CONVERT, NTDB_NOMMAP|NTDB_CONVERT };
int i;
struct ntdb_context *ntdb;
NTDB_DATA key, data;
plan_tests(sizeof(flags)/sizeof(flags[0]) * 5);
agent = prepare_external_agent();
if (!agent)
err(1, "preparing agent");
unlock_callback = after_unlock;
for (i = 0; i < sizeof(flags)/sizeof(flags[0]); i++) {
diag("Test with %s and %s\n",
(flags[i] & NTDB_CONVERT) ? "CONVERT" : "DEFAULT",
(flags[i] & NTDB_NOMMAP) ? "no mmap" : "mmap");
unlink(TEST_DBNAME);
ntdb = ntdb_open(TEST_DBNAME, flags[i],
O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
ok1(ntdb);
opened = true;
ok1(ntdb_transaction_start(ntdb) == 0);
key = ntdb_mkdata("hi", strlen("hi"));
data = ntdb_mkdata("world", strlen("world"));
ok1(ntdb_store(ntdb, key, data, NTDB_INSERT) == 0);
ok1(ntdb_transaction_commit(ntdb) == 0);
ok(!errors, "We had %u open errors", errors);
opened = false;
ntdb_close(ntdb);
}
return exit_status();
}
|
