| /* |
| * Copyright (c) 2018 FUJITSU LIMITED. All rights reserved. |
| * Author: Xiao Yang <yangx.jy@cn.fujitsu.com> |
| * |
| * This program is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation, either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| /* |
| * Description: |
| * Check the basic functionality of the preadv(2) for the file |
| * opened with O_DIRECT in all filesystem. |
| * preadv(2) should succeed to read the expected content of data |
| * and after reading the file, the file offset is not changed. |
| */ |
| |
| #define _GNU_SOURCE |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/uio.h> |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include "tst_test.h" |
| #include "preadv.h" |
| |
| #define MNTPOINT "mntpoint" |
| #define FNAME MNTPOINT"/file" |
| |
| static int fd; |
| static off_t blk_off, zero_off; |
| static ssize_t blksz; |
| static char *pop_buf; |
| |
| static struct iovec rd_iovec[] = { |
| {NULL, 0}, |
| {NULL, 0}, |
| }; |
| |
| static struct tcase { |
| int count; |
| off_t *offset; |
| ssize_t *size; |
| char content; |
| } tcases[] = { |
| {1, &zero_off, &blksz, 0x61}, |
| {2, &zero_off, &blksz, 0x61}, |
| {1, &blk_off, &blksz, 0x62}, |
| }; |
| |
| static void verify_direct_preadv(unsigned int n) |
| { |
| int i; |
| char *vec; |
| struct tcase *tc = &tcases[n]; |
| |
| vec = rd_iovec[0].iov_base; |
| memset(vec, 0x00, blksz); |
| |
| SAFE_LSEEK(fd, 0, SEEK_SET); |
| |
| TEST(preadv(fd, rd_iovec, tc->count, *tc->offset)); |
| if (TST_RET < 0) { |
| tst_res(TFAIL | TTERRNO, "preadv(O_DIRECT) fails"); |
| return; |
| } |
| |
| if (TST_RET != *tc->size) { |
| tst_res(TFAIL, "preadv(O_DIRECT) read %li bytes, expected %zi", |
| TST_RET, *tc->size); |
| return; |
| } |
| |
| for (i = 0; i < *tc->size; i++) { |
| if (vec[i] != tc->content) |
| break; |
| } |
| |
| if (i < *tc->size) { |
| tst_res(TFAIL, "Buffer wrong at %i have %02x expected %02x", |
| i, vec[i], tc->content); |
| return; |
| } |
| |
| if (SAFE_LSEEK(fd, 0, SEEK_CUR) != 0) { |
| tst_res(TFAIL, "preadv(O_DIRECT) has changed file offset"); |
| return; |
| } |
| |
| tst_res(TPASS, "preadv(O_DIRECT) read %zi bytes successfully " |
| "with content '%c' expectedly", *tc->size, tc->content); |
| } |
| |
| static void setup(void) |
| { |
| int dev_fd, ret; |
| |
| dev_fd = SAFE_OPEN(tst_device->dev, O_RDWR); |
| SAFE_IOCTL(dev_fd, BLKSSZGET, &ret); |
| SAFE_CLOSE(dev_fd); |
| |
| if (ret <= 0) |
| tst_brk(TBROK, "BLKSSZGET returned invalid block size %i", ret); |
| |
| tst_res(TINFO, "Using block size %i", ret); |
| |
| blksz = ret; |
| blk_off = ret; |
| |
| fd = SAFE_OPEN(FNAME, O_RDWR | O_CREAT | O_DIRECT, 0644); |
| |
| pop_buf = SAFE_MEMALIGN(blksz, blksz); |
| memset(pop_buf, 0x61, blksz); |
| SAFE_WRITE(1, fd, pop_buf, blksz); |
| |
| memset(pop_buf, 0x62, blksz); |
| SAFE_WRITE(1, fd, pop_buf, blksz); |
| |
| rd_iovec[0].iov_base = SAFE_MEMALIGN(blksz, blksz); |
| rd_iovec[0].iov_len = blksz; |
| } |
| |
| static void cleanup(void) |
| { |
| free(pop_buf); |
| free(rd_iovec[0].iov_base); |
| |
| if (fd > 0) |
| SAFE_CLOSE(fd); |
| } |
| |
| static struct tst_test test = { |
| .tcnt = ARRAY_SIZE(tcases), |
| .setup = setup, |
| .cleanup = cleanup, |
| .test = verify_direct_preadv, |
| .min_kver = "2.6.30", |
| .mntpoint = MNTPOINT, |
| .mount_device = 1, |
| .all_filesystems = 1, |
| }; |