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#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <inttypes.h>
#include <linux/types.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <errno.h>
//#include "../client/ioctl.h"
#include <linux/ioctl.h>
#define CEPH_IOCTL_MAGIC 0x97
#define CEPH_IOC_SYNCIO _IO(CEPH_IOCTL_MAGIC, 5)
void write_pattern()
{
printf("writing pattern\n");
uint64_t i;
int r;
int fd = open("foo", O_CREAT|O_WRONLY, 0644);
if (fd < 0) {
r = errno;
printf("write_pattern: error: open() failed with: %d (%s)\n", r, strerror(r));
exit(r);
}
for (i=0; i<1048576 * sizeof(i); i += sizeof(i)) {
r = write(fd, &i, sizeof(i));
if (r == -1) {
r = errno;
printf("write_pattern: error: write() failed with: %d (%s)\n", r, strerror(r));
break;
}
}
close(fd);
}
int verify_pattern(char *buf, size_t len, uint64_t off)
{
size_t i;
for (i = 0; i < len; i += sizeof(uint64_t)) {
uint64_t expected = i + off;
uint64_t actual = *(uint64_t*)(buf + i);
if (expected != actual) {
printf("error: offset %llu had %llu\n", (unsigned long long)expected,
(unsigned long long)actual);
exit(1);
}
}
return 0;
}
void generate_pattern(void *buf, size_t len, uint64_t offset)
{
uint64_t *v = buf;
size_t i;
for (i=0; i<len / sizeof(v); i++)
v[i] = i * sizeof(v) + offset;
verify_pattern(buf, len, offset);
}
int read_file(int buf_align, uint64_t offset, int len, int direct) {
printf("read_file buf_align %d offset %llu len %d\n", buf_align,
(unsigned long long)offset, len);
void *rawbuf;
int r;
int flags;
int err = 0;
if(direct)
flags = O_RDONLY|O_DIRECT;
else
flags = O_RDONLY;
int fd = open("foo", flags);
if (fd < 0) {
err = errno;
printf("read_file: error: open() failed with: %d (%s)\n", err, strerror(err));
exit(err);
}
if (!direct)
ioctl(fd, CEPH_IOC_SYNCIO);
if ((r = posix_memalign(&rawbuf, 4096, len + buf_align)) != 0) {
printf("read_file: error: posix_memalign failed with %d", r);
close(fd);
exit (r);
}
void *buf = (char *)rawbuf + buf_align;
memset(buf, 0, len);
r = pread(fd, buf, len, offset);
if (r == -1) {
err = errno;
printf("read_file: error: pread() failed with: %d (%s)\n", err, strerror(err));
goto out;
}
r = verify_pattern(buf, len, offset);
out:
close(fd);
free(rawbuf);
return r;
}
int read_direct(int buf_align, uint64_t offset, int len)
{
printf("read_direct buf_align %d offset %llu len %d\n", buf_align,
(unsigned long long)offset, len);
return read_file(buf_align, offset, len, 1);
}
int read_sync(int buf_align, uint64_t offset, int len)
{
printf("read_sync buf_align %d offset %llu len %d\n", buf_align,
(unsigned long long)offset, len);
return read_file(buf_align, offset, len, 0);
}
int write_file(int buf_align, uint64_t offset, int len, int direct)
{
printf("write_file buf_align %d offset %llu len %d\n", buf_align,
(unsigned long long)offset, len);
void *rawbuf;
int r;
int err = 0;
int flags;
if (direct)
flags = O_WRONLY|O_DIRECT|O_CREAT;
else
flags = O_WRONLY|O_CREAT;
int fd = open("foo", flags, 0644);
if (fd < 0) {
int err = errno;
printf("write_file: error: open() failed with: %d (%s)\n", err, strerror(err));
exit(err);
}
if ((r = posix_memalign(&rawbuf, 4096, len + buf_align)) != 0) {
printf("write_file: error: posix_memalign failed with %d", r);
err = r;
goto out_close;
}
if (!direct)
ioctl(fd, CEPH_IOC_SYNCIO);
void *buf = (char *)rawbuf + buf_align;
generate_pattern(buf, len, offset);
r = pwrite(fd, buf, len, offset);
close(fd);
fd = open("foo", O_RDONLY);
if (fd < 0) {
err = errno;
printf("write_file: error: open() failed with: %d (%s)\n", err, strerror(err));
free(rawbuf);
goto out_unlink;
}
void *buf2 = malloc(len);
if (!buf2) {
err = -ENOMEM;
printf("write_file: error: malloc failed\n");
goto out_free;
}
memset(buf2, 0, len);
r = pread(fd, buf2, len, offset);
if (r == -1) {
err = errno;
printf("write_file: error: pread() failed with: %d (%s)\n", err, strerror(err));
goto out_free_buf;
}
r = verify_pattern(buf2, len, offset);
out_free_buf:
free(buf2);
out_free:
free(rawbuf);
out_close:
close(fd);
out_unlink:
unlink("foo");
if (err)
exit(err);
return r;
}
int write_direct(int buf_align, uint64_t offset, int len)
{
printf("write_direct buf_align %d offset %llu len %d\n", buf_align,
(unsigned long long)offset, len);
return write_file (buf_align, offset, len, 1);
}
int write_sync(int buf_align, uint64_t offset, int len)
{
printf("write_sync buf_align %d offset %llu len %d\n", buf_align,
(unsigned long long)offset, len);
return write_file (buf_align, offset, len, 0);
}
int main(int argc, char **argv)
{
uint64_t i, j, k;
int read = 1;
int write = 1;
if (argc >= 2 && strcmp(argv[1], "read") == 0)
write = 0;
if (argc >= 2 && strcmp(argv[1], "write") == 0)
read = 0;
if (read) {
write_pattern();
for (i = 0; i < 4096; i += 512)
for (j = 4*1024*1024 - 4096; j < 4*1024*1024 + 4096; j += 512)
for (k = 1024; k <= 16384; k *= 2) {
read_direct(i, j, k);
read_sync(i, j, k);
}
}
unlink("foo");
if (write) {
for (i = 0; i < 4096; i += 512)
for (j = 4*1024*1024 - 4096 + 512; j < 4*1024*1024 + 4096; j += 512)
for (k = 1024; k <= 16384; k *= 2) {
write_direct(i, j, k);
write_sync(i, j, k);
}
}
return 0;
}
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