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
|
/*
* This is an example RADOS object class built using only the Ceph SDK interface.
*/
#include "include/rados/objclass.h"
CLS_VER(1,0)
CLS_NAME(sdk)
cls_handle_t h_class;
cls_method_handle_t h_test_coverage_write;
cls_method_handle_t h_test_coverage_replay;
/**
* test_coverage_write - a "write" method that creates an object
*
* This method modifies the object by making multiple write calls (write,
* setxattr and set_val).
*/
static int test_coverage_write(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
{
// create the object
int ret = cls_cxx_create(hctx, false);
if (ret < 0) {
CLS_LOG(0, "ERROR: %s(): cls_cxx_create returned %d", __func__, ret);
return ret;
}
uint64_t size;
// get the size of the object
ret = cls_cxx_stat(hctx, &size, NULL);
if (ret < 0)
return ret;
std::string c = "test";
bufferlist bl;
bl.append(c);
// write to the object
ret = cls_cxx_write(hctx, 0, bl.length(), &bl);
if (ret < 0)
return ret;
uint64_t new_size;
// get the new size of the object
ret = cls_cxx_stat(hctx, &new_size, NULL);
if (ret < 0)
return ret;
// make some change to the xattr
ret = cls_cxx_setxattr(hctx, "foo", &bl);
if (ret < 0)
return ret;
// make some change to the omap
ret = cls_cxx_map_set_val(hctx, "foo", &bl);
if (ret < 0)
return ret;
return 0;
}
/**
* test_coverage_replay - a "read" method to retrieve previously written data
*
* This method reads the object by making multiple read calls (read, getxattr
* and get_val). It also removes the object after reading.
*/
static int test_coverage_replay(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
{
CLS_LOG(0, "reading already written object");
uint64_t size;
// get the size of the object
int ret = cls_cxx_stat(hctx, &size, NULL);
if (ret < 0)
return ret;
bufferlist bl;
// read the object entry
ret = cls_cxx_read(hctx, 0, size, &bl);
if (ret < 0)
return ret;
// if the size is incorrect
if (bl.length() != size)
return -EIO;
bl.clear();
// read xattr entry
ret = cls_cxx_getxattr(hctx, "foo", &bl);
if (ret < 0)
return ret;
// if the size is incorrect
if (bl.length() != size)
return -EIO;
bl.clear();
// read omap entry
ret = cls_cxx_map_get_val(hctx, "foo", &bl);
if (ret < 0)
return ret;
// if the size is incorrect
if (bl.length() != size)
return -EIO;
// remove the object
ret = cls_cxx_remove(hctx);
if (ret < 0)
return ret;
return 0;
}
CLS_INIT(sdk)
{
CLS_LOG(0, "loading cls_sdk");
cls_register("sdk", &h_class);
cls_register_cxx_method(h_class, "test_coverage_write",
CLS_METHOD_RD|CLS_METHOD_WR,
test_coverage_write, &h_test_coverage_write);
cls_register_cxx_method(h_class, "test_coverage_replay",
CLS_METHOD_RD|CLS_METHOD_WR,
test_coverage_replay, &h_test_coverage_replay);
}
|
