135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2019 SUSE LLC
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* Author: Christian Amann <camann@suse.com>
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*
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* Tests the ioctl functionality to deduplicate fileranges using
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* btrfs filesystem.
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*
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* 1) Sets the same contents for two files and deduplicates it.
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* Deduplicates 3 bytes and set the status to
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* FILE_DEDUPE_RANGE_SAME.
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* 2) Sets different content for two files and tries to
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* deduplicate it. 0 bytes get deduplicated and status is
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* set to FILE_DEDUPE_RANGE_DIFFERS.
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* 3) Sets same content for two files but sets the length to
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* deduplicate to -1. ioctl(FIDEDUPERANGE) fails with EINVAL.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <errno.h>
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#include "tst_test.h"
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#ifdef HAVE_STRUCT_FILE_DEDUPE_RANGE
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#include <linux/fs.h>
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#define SUCCESS 0
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#define MNTPOINT "mnt_point"
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#define FILE_SRC_PATH MNTPOINT"/file_src"
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#define FILE_DEST_PATH MNTPOINT"/file_dest"
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static int fd_src;
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static int fd_dest;
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static struct file_dedupe_range *fdr;
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static struct tcase {
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uint64_t src_length;
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char *src_fcontents;
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char *dest_fcontents;
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int exp_err;
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uint64_t bytes_deduped;
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int status;
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} tcases[] = {
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{3, "AAA", "AAA", SUCCESS, 3, FILE_DEDUPE_RANGE_SAME},
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{3, "AAA", "AAB", SUCCESS, 0, FILE_DEDUPE_RANGE_DIFFERS},
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{-1, "AAA", "AAA", EINVAL, 0, 0},
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};
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static void verify_ioctl(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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fd_src = SAFE_OPEN(FILE_SRC_PATH, O_RDWR | O_CREAT, 0664);
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fd_dest = SAFE_OPEN(FILE_DEST_PATH, O_RDWR | O_CREAT, 0664);
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SAFE_WRITE(1, fd_src, tc->src_fcontents, strlen(tc->src_fcontents));
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SAFE_WRITE(1, fd_dest, tc->dest_fcontents, strlen(tc->dest_fcontents));
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memset(fdr, 0, sizeof(struct file_dedupe_range) +
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sizeof(struct file_dedupe_range_info));
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fdr->src_length = tc->src_length;
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fdr->dest_count = 1;
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fdr->info[0].dest_fd = fd_dest;
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TEST(ioctl(fd_src, FIDEDUPERANGE, fdr));
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if (tc->exp_err != TST_ERR) {
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tst_res(TFAIL,
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"ioctl(FIDEDUPERANGE) ended with %s, expected %s",
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tst_strerrno(TST_ERR), tst_strerrno(tc->exp_err));
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return;
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}
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if (fdr->info[0].bytes_deduped != tc->bytes_deduped) {
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tst_res(TFAIL,
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"ioctl(FIDEDUPERANGE) deduplicated %lld bytes, expected %ld. Status: %d",
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fdr->info[0].bytes_deduped, tc->bytes_deduped,
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fdr->info[0].status);
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return;
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}
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if (fdr->info[0].status != tc->status) {
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tst_res(TFAIL,
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"ioctl(FIDEDUPERANGE) status set to %d, expected %d",
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fdr->info[0].status, tc->status);
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return;
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}
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tst_res(TPASS, "ioctl(FIDEDUPERANGE) ended with %s as expected",
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tst_strerrno(tc->exp_err));
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SAFE_CLOSE(fd_dest);
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SAFE_CLOSE(fd_src);
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}
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static void cleanup(void)
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{
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if (fd_dest > 0)
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SAFE_CLOSE(fd_dest);
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if (fd_src > 0)
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SAFE_CLOSE(fd_src);
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if (fdr)
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free(fdr);
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}
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static void setup(void)
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{
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fdr = SAFE_MALLOC(sizeof(struct file_dedupe_range) +
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sizeof(struct file_dedupe_range_info));
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}
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static struct tst_test test = {
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.test = verify_ioctl,
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.tcnt = ARRAY_SIZE(tcases),
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.setup = setup,
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.cleanup = cleanup,
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.min_kver = "4.5",
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.needs_root = 1,
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.mount_device = 1,
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.mntpoint = MNTPOINT,
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.dev_fs_type = "btrfs",
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.needs_drivers = (const char *const[]) {
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"btrfs",
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NULL,
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},
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};
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#else
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TST_TEST_TCONF(
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"This system does not provide support for ioctl(FIDEDUPERANGE)");
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#endif
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