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/*
* btrfs-extent-same.c
*
* Copyright (C) 2013 SUSE. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* Authors: Mark Fasheh <mfasheh@suse.de>
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include <errno.h>
#include <string.h>
#include <sys/ioctl.h>
#include "ioctl.h"
unsigned int blocksize;
static void usage(const char *prog)
{
printf("Usage: %s len file1 loff1 file2 loff2\n", prog);
}
int main(int argc, char **argv)
{
int ret, src_fd, i, numfiles;
char *srcf, *destf;
struct file_dedupe_range *same;
struct file_dedupe_range_info *info;
unsigned long long bytes = 0ULL;
if (argc < 6 || (argc % 2)) {
usage(argv[0]);
return 1;
}
numfiles = (argc / 2) - 2;
printf("Deduping %d total files\n", numfiles + 1);
same = calloc(1,
sizeof(struct file_dedupe_range) +
sizeof(struct file_dedupe_range_info) * numfiles);
if (!same)
return -ENOMEM;
srcf = argv[2];
same->src_length = atoll(argv[1]);
same->src_offset = atoll(argv[3]);
same->dest_count = numfiles;
ret = open(srcf, O_RDONLY);
if (ret < 0) {
ret = errno;
fprintf(stderr, "Could not open file %s: (%d) %s\n", srcf, ret,
strerror(ret));
return -ret;
}
src_fd = ret;
printf("(%llu, %llu): %s\n", (unsigned long long)same->src_offset,
(unsigned long long)same->src_length, srcf);
for (i = 0; i < same->dest_count; i++) {
destf = argv[4 + (i * 2)];
ret = open(destf, O_WRONLY);
if (ret < 0) {
ret = errno;
fprintf(stderr, "Could not open file %s: (%d) %s\n",
destf, ret, strerror(ret));
return -ret;
}
same->info[i].dest_fd = ret;
same->info[i].dest_offset = atoll(argv[5 + (i * 2)]);
printf("(%llu, %llu): %s\n",
(unsigned long long)same->info[i].dest_offset,
(unsigned long long)same->src_length, destf);
}
ret = ioctl(src_fd, FIDEDUPERANGE, same);
if (ret < 0) {
ret = errno;
fprintf(stderr, "fideduprange returned error: (%d) %s\n", ret,
strerror(ret));
return -ret;
}
printf("%u files asked to be deduped\n", same->dest_count);
for (i = 0; i < same->dest_count; i++) {
info = &same->info[i];
printf("i: %d, status: %d, bytes_deduped: %llu\n", i,
info->status, (unsigned long long)info->bytes_deduped);
bytes += info->bytes_deduped;
}
printf("%llu total bytes deduped in this operation\n", bytes);
return ret;
}
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