From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yang Xu Date: Thu, 11 Jun 2020 18:35:16 +0800 Subject: [LTP] [PATCH v1 4/4] syscalls/ioctl_loop09: Add LOOP_CONFIGURE ioctl test with direct I/O flag In-Reply-To: <1591871716-21250-1-git-send-email-xuyang2018.jy@cn.fujitsu.com> References: <1591871716-21250-1-git-send-email-xuyang2018.jy@cn.fujitsu.com> Message-ID: <1591871716-21250-5-git-send-email-xuyang2018.jy@cn.fujitsu.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it Since kernel commit 3448914e8cc5("loop: Add LOOP_CONFIGURE ioctl"), it can explicitly request direct I/O mode by setting LO_FLAGS_DIRECT_IO in loop_config.info.lo_flags. Signed-off-by: Yang Xu --- runtest/syscalls | 1 + testcases/kernel/syscalls/ioctl/.gitignore | 1 + .../kernel/syscalls/ioctl/ioctl_loop09.c | 151 ++++++++++++++++++ 3 files changed, 153 insertions(+) create mode 100644 testcases/kernel/syscalls/ioctl/ioctl_loop09.c diff --git a/runtest/syscalls b/runtest/syscalls index 7259f2a92..df99a0600 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -537,6 +537,7 @@ ioctl_loop05 ioctl_loop05 ioctl_loop06 ioctl_loop06 ioctl_loop07 ioctl_loop07 ioctl_loop08 ioctl_loop08 +ioctl_loop09 ioctl_loop09 ioctl_ns01 ioctl_ns01 ioctl_ns02 ioctl_ns02 diff --git a/testcases/kernel/syscalls/ioctl/.gitignore b/testcases/kernel/syscalls/ioctl/.gitignore index 97134aa0b..0decf6ea1 100644 --- a/testcases/kernel/syscalls/ioctl/.gitignore +++ b/testcases/kernel/syscalls/ioctl/.gitignore @@ -14,6 +14,7 @@ /ioctl_loop06 /ioctl_loop07 /ioctl_loop08 +/ioctl_loop09 /ioctl_ns01 /ioctl_ns02 /ioctl_ns03 diff --git a/testcases/kernel/syscalls/ioctl/ioctl_loop09.c b/testcases/kernel/syscalls/ioctl/ioctl_loop09.c new file mode 100644 index 000000000..c291afeb6 --- /dev/null +++ b/testcases/kernel/syscalls/ioctl/ioctl_loop09.c @@ -0,0 +1,151 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2020 FUJITSU LIMITED. All rights reserved. + * Author: Yang Xu + * + * This is a basic ioctl test about loopdevice. It sets LO_FLAGS_DIRECT_IO + * in loop_config.info.lo_flags by using LOOP_CONFIGURE instead of using + * LOOP_SET_DIRECT_IO. It is similar with ioctl_loop05.c. + */ + +#include +#include +#include +#include +#include +#include "lapi/loop.h" +#include "tst_test.h" +#include "tst_safe_stdio.h" + +#define DIO_MESSAGE "In dio mode" +#define NON_DIO_MESSAGE "In non dio mode" + +static char dev_path[1024], sys_loop_diopath[1024]; +static int dev_num, dev_fd, file_fd, block_devfd, logical_block_size; +static struct loop_config loopconfig; +static struct tcase { + int multi; /*logical_block_size / 2 as unit */ + int dio_value; + char *message; +} tcases[] = { + {0, 1, "Without setting lo_offset or sizelimit"}, + {2, 1, "With offset equal to logical_block_size"}, + {1, 0, "less than logical_block_size"}, +}; + +static void check_dio_value(int flag) +{ + struct loop_info loopinfoget; + + memset(&loopinfoget, 0, sizeof(loopinfoget)); + + SAFE_IOCTL(dev_fd, LOOP_GET_STATUS, &loopinfoget); + tst_res(TINFO, "%s", flag ? DIO_MESSAGE : NON_DIO_MESSAGE); + + if (loopinfoget.lo_flags & LO_FLAGS_DIRECT_IO) + tst_res(flag ? TPASS : TFAIL, "lo_flags has LO_FLAGS_DIRECT_IO flag"); + else + tst_res(flag ? TFAIL : TPASS, "lo_flags doesn't have LO_FLAGS_DIRECT_IO flag"); + + TST_ASSERT_INT(sys_loop_diopath, flag); +} + +static void find_backing_bdpath(char *buf) +{ + const char *const df_cmd[] = {"df", "-T", ".", NULL}; + char line[PATH_MAX]; + FILE *file; + + SAFE_CMD(df_cmd, "1.txt", NULL); + file = SAFE_FOPEN("1.txt", "r"); + + while (fgets(line, sizeof(line), file) != NULL) { + sscanf(line, "%s", buf); + if (strstr(buf, "/dev/") != NULL) + break; + } + SAFE_FCLOSE(file); +} + +static void verify_ioctl_loop(unsigned int n) +{ + struct tcase *tc = &tcases[n]; + + loopconfig.info.lo_offset = tc->multi * logical_block_size / 2; + + tst_res(TINFO, "%s", tc->message); + /* + * When we call loop_configure ioctl successfully and detach it, + * the subquent loo_configure without non-zero lo_offset or sizelimit + * may trigger the blk_update_request I/O error. To avoid this, sleep + * 1s to ensure last blk_update_request has completed. + */ + sleep(1); + + /* + * loop_cofigure calls loop_update_dio() function, it will ignore the result + * of setting dio. It is different from loop_set_dio. + */ + TST_RETRY_FUNC(ioctl(dev_fd, LOOP_CONFIGURE, &loopconfig), TST_RETVAL_EQ0); + check_dio_value(tc->dio_value); + TST_RETRY_FUNC(ioctl(dev_fd, LOOP_CLR_FD, 0), TST_RETVAL_EQ0); +} + +static void setup(void) +{ + int ret; + char buf[100]; + + if (tst_fs_type(".") == TST_TMPFS_MAGIC) + tst_brk(TCONF, "tmpfd doesn't support O_DIRECT flag"); + + dev_num = tst_find_free_loopdev(dev_path, sizeof(dev_path)); + if (dev_num < 0) + tst_brk(TBROK, "Failed to find free loop device"); + + sprintf(sys_loop_diopath, "/sys/block/loop%d/loop/dio", dev_num); + tst_fill_file("test.img", 0, 1024, 1024); + dev_fd = SAFE_OPEN(dev_path, O_RDWR); + file_fd = SAFE_OPEN("test.img", O_RDWR); + + find_backing_bdpath(buf); + block_devfd = SAFE_OPEN(buf, O_RDWR); + + SAFE_IOCTL(block_devfd, BLKSSZGET, &logical_block_size); + tst_res(TINFO, "backing dev logical_block_size is %d", logical_block_size); + SAFE_CLOSE(block_devfd); + loopconfig.fd = -1; + ret = ioctl(dev_fd, LOOP_CONFIGURE, &loopconfig); + + if (ret && errno != EBADF) + tst_brk(TCONF | TERRNO, "LOOP_CONFIGURE is not supported"); + loopconfig.fd = file_fd; + loopconfig.info.lo_flags = LO_FLAGS_DIRECT_IO; +} + +static void cleanup(void) +{ + if (dev_fd > 0) + SAFE_CLOSE(dev_fd); + if (block_devfd > 0) + SAFE_CLOSE(block_devfd); + if (file_fd > 0) + SAFE_CLOSE(file_fd); +} + +static struct tst_test test = { + .setup = setup, + .cleanup = cleanup, + .tcnt = ARRAY_SIZE(tcases), + .test = verify_ioctl_loop, + .needs_root = 1, + .needs_tmpdir = 1, + .needs_drivers = (const char *const []) { + "loop", + NULL + }, + .needs_cmds = (const char *const []) { + "df", + NULL + } +}; -- 2.23.0