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#include <glusterfs/api/glfs.h>
#include <glusterfs/api/glfs-handles.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define NO_INIT 1
#define GF_ENFORCE_MANDATORY_LOCK "trusted.glusterfs.enforce-mandatory-lock"
FILE *fp;
char *buf = "0123456789";
#define LOG_ERR(func, err) \
do { \
if (!fp) { \
fprintf(stderr, "%\n%d %s : returned error (%s)\n", __LINE__, \
func, strerror(err)); \
fflush(stderr); \
} else { \
fprintf(fp, "\n%d %s : returned error (%s)\n", __LINE__, func, \
strerror(err)); \
fflush(fp); \
} \
} while (0)
glfs_t *
setup_new_client(char *hostname, char *volname, char *log_file, int flag)
{
int ret = 0;
glfs_t *fs = NULL;
fs = glfs_new(volname);
if (!fs) {
fprintf(fp, "\nglfs_new: returned NULL (%s)\n", strerror(errno));
goto error;
}
ret = glfs_set_volfile_server(fs, "tcp", hostname, 24007);
if (ret < 0) {
fprintf(fp, "\nglfs_set_volfile_server failed ret:%d (%s)\n", ret,
strerror(errno));
goto error;
}
ret = glfs_set_logging(fs, log_file, 7);
if (ret < 0) {
fprintf(fp, "\nglfs_set_logging failed with ret: %d (%s)\n", ret,
strerror(errno));
goto error;
}
if (flag == NO_INIT)
goto out;
ret = glfs_init(fs);
if (ret < 0) {
fprintf(fp, "\nglfs_init failed with ret: %d (%s)\n", ret,
strerror(errno));
goto error;
}
out:
return fs;
error:
return NULL;
}
/* test plan
*
* - take mandatory lock from client 1
* - preempt mandatory lock from client 2
* - write from client 1 which should fail
*/
int
test(glfs_t *fs1, glfs_t *fs2, char *fname)
{
struct flock lock;
int ret = 0;
glfs_fd_t *fd1, *fd2 = NULL;
fd1 = glfs_creat(fs1, fname, O_RDWR, 0777);
if (ret) {
LOG_ERR("glfs_creat", errno);
ret = -1;
goto out;
}
fd2 = glfs_open(fs2, fname, O_RDWR | O_NONBLOCK);
if (ret) {
LOG_ERR("glfs_open", errno);
ret = -1;
goto out;
}
/* initialize lock */
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = 0;
lock.l_len = 100;
ret = glfs_fsetxattr(fd1, GF_ENFORCE_MANDATORY_LOCK, "set", 8, 0);
if (ret < 0) {
LOG_ERR("glfs_fsetxattr", errno);
ret = -1;
goto out;
}
/* take a write mandatory lock */
ret = glfs_file_lock(fd1, F_SETLKW, &lock, GLFS_LK_MANDATORY);
if (ret) {
LOG_ERR("glfs_file_lock", errno);
goto out;
}
ret = glfs_write(fd1, buf, 10, 0);
if (ret != 10) {
LOG_ERR("glfs_write", errno);
ret = -1;
goto out;
}
/* write should fail */
ret = glfs_write(fd2, buf, 10, 0);
if (ret != -1) {
LOG_ERR("glfs_write", errno);
ret = -1;
goto out;
}
/* preempt mandatory lock from client 1*/
ret = glfs_file_lock(fd2, F_SETLKW, &lock, GLFS_LK_MANDATORY);
if (ret) {
LOG_ERR("glfs_file_lock", errno);
goto out;
}
/* write should succeed from client 2 */
ret = glfs_write(fd2, buf, 10, 0);
if (ret == -1) {
LOG_ERR("glfs_write", errno);
goto out;
}
/* write should fail from client 1 */
ret = glfs_write(fd1, buf, 10, 0);
if (ret == 10) {
LOG_ERR("glfs_write", errno);
ret = -1;
goto out;
}
ret = 0;
out:
if (fd1) {
glfs_close(fd1);
}
if (fd2) {
glfs_close(fd2);
}
return ret;
}
int
main(int argc, char *argv[])
{
int ret = 0;
glfs_t *fs1 = NULL;
glfs_t *fs2 = NULL;
char *volname = NULL;
char log_file[100];
char *hostname = NULL;
char *fname = "/file";
glfs_fd_t *fd1 = NULL;
glfs_fd_t *fd2 = NULL;
if (argc != 4) {
fprintf(
stderr,
"Expect following args %s <hostname> <Vol> <log file location>\n",
argv[0]);
return -1;
}
hostname = argv[1];
volname = argv[2];
sprintf(log_file, "%s/%s", argv[3], "fence-basic.log");
fp = fopen(log_file, "w");
if (!fp) {
fprintf(stderr, "\nfailed to open %s\n", log_file);
fflush(stderr);
return -1;
}
sprintf(log_file, "%s/%s", argv[3], "glfs-client-1.log");
fs1 = setup_new_client(hostname, volname, log_file, 0);
if (!fs1) {
LOG_ERR("setup_new_client", errno);
return -1;
}
sprintf(log_file, "%s/%s", argv[3], "glfs-client-2.log");
fs2 = setup_new_client(hostname, volname, log_file, 0);
if (!fs2) {
LOG_ERR("setup_new_client", errno);
ret = -1;
goto error;
}
ret = test(fs1, fs2, fname);
error:
if (fs1) {
glfs_fini(fs1);
}
if (fs2) {
glfs_fini(fs2);
}
fclose(fp);
return ret;
}
|
