rados、rbd读写API测试：
1 //compile:
2 //gcc ceph_test_v2.c -lrbd -lrados -g -Wall
3
4 #include <stdio.h>
5 #include <stdlib.h>
6 #include <string.h>
7 #include <rados/librados.h>
8 #include <rbd/librbd.h>
9
10 static int print_progress_percent(uint64_t offset, uint64_t src_size,void *data)
11 {
12 float percent = ((float)offset*100)/src_size;
13 printf("%3.2f%% done\n", percent);
14 return 0;
15 }
16
17 int main(int argc, char** argv)
18 {
19 rados_t cluster;
20 char cluster_name[] = "ceph";
21 char user_name[] = "client.admin";
22 uint64_t flags = 0;
23 int i=0;
24
25 rados_ioctx_t io;
26 char *poolname = "kvm";
27
28 //Initialize the cluster handle with the "ceph" cluster name
29 //and the "client.admin" user name
30 int rt_num;
31 rt_num = rados_create2(&cluster, cluster_name, user_name, flags);
32 if(rt_num<0){
33 printf("%s: Couldn‘t create the cluster handle! %s\n", argv[0], strerror(-rt_num));
34 return -1;
35 }else{
36 printf("\nCreated a cluster handle success. \n");
37 }
38
39 //Read a ceph configuration file to configure the cluster handle
40 rt_num = rados_conf_read_file(cluster, "/etc/ceph/ceph.conf");
41 if(rt_num<0){
42 printf("%s:can‘t read config file: %s\n", argv[0], strerror(-rt_num));
43 return -1;
44 }else{
45 printf("\nRead the config file. \n");
46 }
47
48 //Read command line arguments
49 /*
50 rt_num = rados_conf_parse_argv(cluster, argc, argv);
51 if(rt_num<0){
52 printf("%s:cannot parse command line arguments:%s\n", argv[0], strerror(-rt_num));
53 return -1;
54 }else{
55 printf("\nRead the command line arguments.\n");
56 }*/
57
58 //Connect to the cluster
59 rt_num = rados_connect(cluster);
60 if(rt_num<0){
61 printf("%s:cannot connect to cluster:%s\n", argv[0], strerror(-rt_num));
62 return -1;
63 }else{
64 printf("\nConnected to the cluster.\n");
65 }
66
67 //create io handle
68 rt_num = rados_ioctx_create(cluster, poolname, &io);
69 if(rt_num<0){
70 printf("%s:cannot open rados pool %s:%s", argv[0], poolname, strerror(-rt_num));
71 rados_shutdown(cluster);
72 return -1;
73 }else{
74 printf("\nCreated I/O context. \n");
75 }
76
77 const char* name = "3400.img";
78 const char* name_01 = "3000.img";
79 /*const char* name_02 = "rbd_test_02.img";
80 uint64_t size = 1073741824;
81 uint64_t features = 1073741824;
82 int order = 22; //warning
83 //int rbd_create2(rados_ioctx_t io, const char *name, uint64_t size, uint64_t features, int *order);
84 rt_num = rbd_create( io, name, size, &order);
85 if( rt_num ==0 ){
86 printf("\nrbd_create success !!\n");
87 }else{
88 printf("\nrbd_create failed !!%s\n", strerror(-rt_num));
89 }*/
90
91
92 rbd_image_t image;
93 //rbd_image_info_t info;
94 //size_t infosize;
95
96 //rt_num = rbd_stat(image, &info, sizeof(info));
97 //if(rt_num < 0){
98 // printf("rbd_stat error !!\n");
99 //}
100 //printf("rbd_stat rt_num:%d, size:%d", rt_num, (int)info.size);
101
102 //int rbd_remove_with_progress(rados_ioctx_t io, const char *name,librbd_progress_fn_t cb, void *cbdata);
103 //librbd_progress_fn_t cb;
104 //void* cbdata = NULL;
105 printf("\nremove img name:%s\n", name_01);
106 rt_num = rbd_remove_with_progress(io, name_01, print_progress_percent, NULL);
107 if(rt_num ==0){
108 printf("\nrbd_remove success !!\n");
109 }
110
111 //int rbd_open(rados_ioctx_t io, const char *name, rbd_image_t *image, const char *snap_name);
112 rt_num = rbd_open( io, name, &image, NULL);
113 if( rt_num ==0 ){
114 printf("\nrbd_open success !!\n");
115 }else{
116 printf("\nrbd_open failed !!%s\n", strerror(-rt_num));
117 }
118
119 size_t num = 156384;
120 char* buf=(char*)malloc(num);
121 char buf1[30]="";
122 uint64_t ofs = 0;
123 ssize_t ok_size = 0;
124 i = 10;
125 //ssize_t rbd_write(rbd_image_t image, uint64_t ofs, size_t len, const char *buf);
126 for(;i>0;i--){
127 ok_size = rbd_write(image, ofs, num , buf);
128 if(ok_size == num){
129 ofs = ok_size + ofs;
130 printf("rbd_write ok!! ofs: %lu\n", ofs);
131 }else{
132 printf("rbd_write fail!!\n");
133 }
134 }
135
136 rbd_image_info_t info_tmp;
137 rt_num = rbd_stat(image, &info_tmp, sizeof(info_tmp));
138 if(rt_num < 0){
139 printf("\nrbd_stat failed %s\n", name);
140 }else{
141 printf("\nrbd_stat size :%d\n", (int)info_tmp.size);
142 }
143
144
145 ofs = 0;
146 rt_num = rbd_get_size(image, &ofs);
147 if(rt_num >= 0){
148 printf("\nrbd_get_size %d\n", (int)ofs);
149 }
150 printf("\nrbd_get_size return_num: %d\n", rt_num);
151 ofs = 0;
152 //ssize_t rbd_read(rbd_image_t image, uint64_t ofs, size_t len, char *buf);
153 for(i=0;i<10;i++){
154 ok_size = rbd_read(image, ofs, 10, buf1);
155 if(ok_size >0){
156 ofs = 10+ofs;
157 printf("\nthe content is:%s", buf1);
158 }else{
159 printf("rbd_read fail!!\n");
160 }
161 }
162
163 //int rbd_aio_write(rbd_image_t image, uint64_t off, size_t len, const char *buf, rbd_completion_t c);
164 //int rbd_aio_read(rbd_image_t image, uint64_t off, size_t len, char *buf, rbd_completion_t c);
165
166 /*
167 rt_num = rbd_open_read_only( io, name_01, image, NULL);
168 if(rt_num == 0){
169 printf("\nrbd_open_read_only success !!\n");
170 }else{
171 printf("\nrbd_open_read_only fail !!\n");
172 }
173 */
174
175
176
177 rt_num = rbd_close(image);
178 if(rt_num == 0){
179 printf("\nrbd_close success !!\n");
180 }else{
181 printf("\nrbd_close failed !!%s\n", strerror(-rt_num));
182 }
183
184 printf("\nClosing the connection\n");
185 rados_ioctx_destroy(io);
186 printf("\nShut down the handle\n");
187 rados_shutdown(cluster);
188 return 0;
189 }
时间： 2025-01-01 12:19:49