142 lines
2.9 KiB
C
142 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2018 FUJITSU LIMITED. All rights reserved.
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* Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
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*/
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/*
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* Description:
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* Check the basic functionality of the pwritev(2) for the file
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* opened with O_DIRECT in all filesystem.
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* pwritev(2) should succeed to write the expected content of data
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* and after writing the file, the file offset is not changed.
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*/
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#define _GNU_SOURCE
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#include <stdlib.h>
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#include <string.h>
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#include <sys/uio.h>
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#include <sys/ioctl.h>
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#include <sys/mount.h>
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#include "tst_test.h"
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#include "pwritev.h"
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#include "tst_safe_prw.h"
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#define MNTPOINT "mntpoint"
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#define FNAME MNTPOINT"/file"
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static char *initbuf, *preadbuf;
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static int fd;
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static off_t blk_off, zero_off;
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static ssize_t blksz;
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static struct iovec wr_iovec[] = {
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{NULL, 0},
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{NULL, 0},
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};
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static struct tcase {
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int count;
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off_t *offset;
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ssize_t *size;
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} tcases[] = {
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{1, &zero_off, &blksz},
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{2, &zero_off, &blksz},
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{1, &blk_off, &blksz},
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};
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static void verify_direct_pwritev(unsigned int n)
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{
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int i;
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struct tcase *tc = &tcases[n];
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SAFE_PWRITE(1, fd, initbuf, blksz * 2, 0);
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TEST(pwritev(fd, wr_iovec, tc->count, *tc->offset));
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if (TST_RET < 0) {
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tst_res(TFAIL | TTERRNO, "pwritev(O_DIRECT) fails");
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return;
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}
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if (TST_RET != *tc->size) {
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tst_res(TFAIL, "pwritev(O_DIRECT) wrote %li bytes, expected %zi",
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TST_RET, *tc->size);
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return;
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}
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if (SAFE_LSEEK(fd, 0, SEEK_CUR) != 0) {
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tst_res(TFAIL, "pwritev(O_DIRECT) had changed file offset");
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return;
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}
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memset(preadbuf, 0x00, blksz);
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SAFE_PREAD(1, fd, preadbuf, *tc->size, *tc->offset);
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for (i = 0; i < *tc->size; i++) {
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if (preadbuf[i] != 0x61)
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break;
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}
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if (i != *tc->size) {
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tst_res(TFAIL, "Buffer wrong at %i have %02x expected 0x61",
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i, preadbuf[i]);
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return;
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}
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tst_res(TPASS, "pwritev(O_DIRECT) wrote %zi bytes successfully "
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"with content 'a' expectedly ", *tc->size);
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}
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static void setup(void)
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{
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int dev_fd, ret;
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dev_fd = SAFE_OPEN(tst_device->dev, O_RDWR);
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SAFE_IOCTL(dev_fd, BLKSSZGET, &ret);
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SAFE_CLOSE(dev_fd);
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if (ret <= 0)
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tst_brk(TBROK, "BLKSSZGET returned invalid block size %i", ret);
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tst_res(TINFO, "Using block size %i", ret);
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blksz = ret;
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blk_off = ret;
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fd = SAFE_OPEN(FNAME, O_RDWR | O_CREAT | O_DIRECT, 0644);
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initbuf = SAFE_MEMALIGN(blksz, blksz * 2);
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memset(initbuf, 0x00, blksz * 2);
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preadbuf = SAFE_MEMALIGN(blksz, blksz);
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wr_iovec[0].iov_base = SAFE_MEMALIGN(blksz, blksz);
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wr_iovec[0].iov_len = blksz;
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memset(wr_iovec[0].iov_base, 0x61, blksz);
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}
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static void cleanup(void)
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{
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free(initbuf);
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free(preadbuf);
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free(wr_iovec[0].iov_base);
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if (fd > 0)
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SAFE_CLOSE(fd);
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.setup = setup,
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.cleanup = cleanup,
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.test = verify_direct_pwritev,
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.min_kver = "2.6.30",
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.mntpoint = MNTPOINT,
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.mount_device = 1,
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.all_filesystems = 1,
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.skip_filesystems = (const char *[]){
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"tmpfs",
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NULL
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}
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};
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