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#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <malloc.h>
#include <unistd.h>
#include <xfs/xfs.h>
/* test thanks to judith@sgi.com */
#define IO_SIZE 1048576
void
print_getbmapx(
const char *pathname,
int fd,
int64_t start,
int64_t limit);
int
main(int argc, char *argv[])
{
int i;
int fd;
char *buf;
struct dioattr dio;
xfs_flock64_t flock;
off_t offset;
char *file;
int loops;
char *dio_env;
if(argc != 3) {
fprintf(stderr, "%s <loops> <file>\n", argv[0]);
exit(1);
}
errno = 0;
loops = strtoull(argv[1], NULL, 0);
if (errno) {
perror("strtoull");
exit(errno);
}
file = argv[2];
while (loops-- > 0) {
sleep(1);
fd = open(file, O_RDWR|O_CREAT|O_DIRECT, 0666);
if (fd < 0) {
perror("open");
exit(1);
}
if (xfsctl(file, fd, XFS_IOC_DIOINFO, &dio) < 0) {
perror("dioinfo");
exit(1);
}
dio_env = getenv("XFS_DIO_MIN");
if (dio_env)
dio.d_mem = dio.d_miniosz = atoi(dio_env);
if ((dio.d_miniosz > IO_SIZE) || (dio.d_maxiosz < IO_SIZE)) {
fprintf(stderr, "Test won't work - iosize out of range"
" (dio.d_miniosz=%d, dio.d_maxiosz=%d)\n",
dio.d_miniosz, dio.d_maxiosz);
exit(1);
}
buf = (char *)memalign(dio.d_mem , IO_SIZE);
if (buf == NULL) {
fprintf(stderr,"Can't get memory\n");
exit(1);
}
memset(buf,'Z',IO_SIZE);
offset = 0;
flock.l_whence = 0;
flock.l_start= 0;
flock.l_len = IO_SIZE*21;
if (xfsctl(file, fd, XFS_IOC_RESVSP64, &flock) < 0) {
perror("xfsctl ");
exit(1);
}
for (i = 0; i < 21; i++) {
if (pwrite(fd, buf, IO_SIZE, offset) != IO_SIZE) {
perror("pwrite");
exit(1);
}
offset += IO_SIZE;
}
print_getbmapx(file, fd, 0, 0);
if (ftruncate(fd, 0)) {
perror("ftruncate");
exit(1);
}
print_getbmapx(file, fd, 0, 0);
close(fd);
}
exit(0);
}
void
print_getbmapx(
const char *pathname,
int fd,
int64_t start,
int64_t limit)
{
struct getbmapx bmapx[50];
int array_size = sizeof(bmapx) / sizeof(bmapx[0]);
int x;
int foundone = 0;
int foundany = 0;
again:
foundone = 0;
memset(bmapx, '\0', sizeof(bmapx));
bmapx[0].bmv_offset = start;
bmapx[0].bmv_length = -1; /* limit - start; */
bmapx[0].bmv_count = array_size;
bmapx[0].bmv_entries = 0; /* no entries filled in yet */
bmapx[0].bmv_iflags = BMV_IF_PREALLOC;
x = array_size;
for (;;) {
if (x > bmapx[0].bmv_entries) {
if (x != array_size) {
break; /* end of file */
}
if (xfsctl(pathname, fd, XFS_IOC_GETBMAPX, bmapx) < 0) {
fprintf(stderr, "XFS_IOC_GETBMAPX failed\n");
exit(1);
}
if (bmapx[0].bmv_entries == 0) {
break;
}
x = 1; /* back at first extent in buffer */
}
if (bmapx[x].bmv_oflags & 1) {
fprintf(stderr, "FOUND ONE %lld %lld %x\n",
(long long) bmapx[x].bmv_offset,
(long long) bmapx[x].bmv_length,
bmapx[x].bmv_oflags);
foundone = 1;
foundany = 1;
}
x++;
}
if (foundone) {
sleep(1);
fprintf(stderr,"Repeat\n");
goto again;
}
if (foundany) {
exit(1);
}
}
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