143 lines
2.9 KiB
C
143 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 preadv(2) for the file
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* opened with O_DIRECT in all filesystem.
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* preadv(2) should succeed to read the expected content of data
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* and after reading 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 "preadv.h"
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#define MNTPOINT "mntpoint"
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#define FNAME MNTPOINT"/file"
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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 char *pop_buf;
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static struct iovec rd_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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char content;
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} tcases[] = {
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{1, &zero_off, &blksz, 0x61},
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{2, &zero_off, &blksz, 0x61},
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{1, &blk_off, &blksz, 0x62},
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};
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static void verify_direct_preadv(unsigned int n)
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{
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int i;
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char *vec;
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struct tcase *tc = &tcases[n];
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vec = rd_iovec[0].iov_base;
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memset(vec, 0x00, blksz);
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SAFE_LSEEK(fd, 0, SEEK_SET);
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TEST(preadv(fd, rd_iovec, tc->count, *tc->offset));
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if (TST_RET < 0) {
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tst_res(TFAIL | TTERRNO, "preadv(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, "preadv(O_DIRECT) read %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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for (i = 0; i < *tc->size; i++) {
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if (vec[i] != tc->content)
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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 %02x",
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i, vec[i], tc->content);
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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, "preadv(O_DIRECT) has changed file offset");
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return;
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}
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tst_res(TPASS, "preadv(O_DIRECT) read %zi bytes successfully "
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"with content '%c' expectedly", *tc->size, tc->content);
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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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pop_buf = SAFE_MEMALIGN(blksz, blksz);
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memset(pop_buf, 0x61, blksz);
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SAFE_WRITE(1, fd, pop_buf, blksz);
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memset(pop_buf, 0x62, blksz);
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SAFE_WRITE(1, fd, pop_buf, blksz);
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rd_iovec[0].iov_base = SAFE_MEMALIGN(blksz, blksz);
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rd_iovec[0].iov_len = blksz;
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}
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static void cleanup(void)
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{
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free(pop_buf);
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free(rd_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_preadv,
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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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