mirror of
https://github.com/linux-apfs/apfstests.git
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src/open_by_handle: program to exercise open_by_handle_at() syscall
This is a clone of src/stale_handle.c test that uses generic open_by_handle_at() syscall instead of the xfs specific ioctl. No test is using this program yet. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
This commit is contained in:
Amir Goldstein
committed by
Eryu Guan
Eryu Guan
parent
bc2568f994
commit
b34b378566
@@ -80,6 +80,7 @@
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/src/multi_open_unlink
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/src/nametest
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/src/nsexec
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/src/open_by_handle
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/src/permname
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/src/preallo_rw_pattern_reader
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/src/preallo_rw_pattern_writer
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Vendored
+15
@@ -37,6 +37,21 @@ AC_DEFUN([AC_PACKAGE_WANT_FALLOCATE],
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[ have_fallocate=false; AC_MSG_RESULT(no) ])
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AC_SUBST(have_fallocate)
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])
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AC_DEFUN([AC_PACKAGE_WANT_OPEN_BY_HANDLE_AT],
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[ AC_MSG_CHECKING([for open_by_handle_at])
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AC_TRY_LINK([
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#define _GNU_SOURCE
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#include <fcntl.h>
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],
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[
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struct file_handle fh;
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open_by_handle_at(0, &fh, 0);
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],
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[ have_open_by_handle_at=true; AC_MSG_RESULT(yes) ],
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[ have_open_by_handle_at=false; AC_MSG_RESULT(no) ])
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AC_SUBST(have_open_by_handle_at)
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])
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m4_include([m4/multilib.m4])
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m4_include([m4/package_acldev.m4])
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m4_include([m4/package_aiodev.m4])
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@@ -75,6 +75,7 @@ in
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AC_PACKAGE_WANT_DMAPI
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AC_PACKAGE_WANT_LINUX_FIEMAP_H
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AC_PACKAGE_WANT_FALLOCATE
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AC_PACKAGE_WANT_OPEN_BY_HANDLE_AT
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AC_PACKAGE_WANT_LINUX_PRCTL_H
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AC_PACKAGE_WANT_LINUX_FS_H
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AC_PACKAGE_WANT_SSL
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@@ -61,6 +61,7 @@ ENABLE_SHARED = @enable_shared@
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HAVE_DB = @have_db@
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HAVE_AIO = @have_aio@
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HAVE_FALLOCATE = @have_fallocate@
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HAVE_OPEN_BY_HANDLE_AT = @have_open_by_handle_at@
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HAVE_SSL = @have_ssl@
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HAVE_DMAPI = @have_dmapi@
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HAVE_ATTR_LIST = @have_attr_list@
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@@ -36,6 +36,10 @@ ifeq ($(HAVE_FIEMAP), true)
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LINUX_TARGETS += fiemap-tester
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endif
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ifeq ($(HAVE_OPEN_BY_HANDLE_AT), true)
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LINUX_TARGETS += open_by_handle
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endif
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ifeq ($(HAVE_FALLOCATE), true)
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LCFLAGS += -DHAVE_FALLOCATE
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endif
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@@ -0,0 +1,143 @@
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/*
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* open_by_handle.c - attempt to create a file handle and open it
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* with open_by_handle_at() syscall
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*
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* Copyright (C) 2017 CTERA Networks. All Rights Reserved.
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* Author: Amir Goldstein <amir73il@gmail.com>
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*
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* from:
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* stale_handle.c
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*
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* Copyright (C) 2010 Red Hat, Inc. All Rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <linux/limits.h>
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#define NUMFILES 1024
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struct handle {
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struct file_handle fh;
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unsigned char fid[MAX_HANDLE_SZ];
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} handle[NUMFILES];
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int main(int argc, char **argv)
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{
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int i;
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int fd;
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int ret;
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int failed = 0;
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char fname[PATH_MAX];
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char *test_dir;
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int mount_fd, mount_id;
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if (argc != 2) {
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fprintf(stderr, "usage: open_by_handle <test_dir>\n");
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return EXIT_FAILURE;
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}
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test_dir = argv[1];
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mount_fd = open(test_dir, O_RDONLY|O_DIRECTORY);
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if (mount_fd < 0) {
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perror("open test_dir");
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return EXIT_FAILURE;
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}
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/*
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* create a large number of files to force allocation of new inode
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* chunks on disk.
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*/
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for (i=0; i < NUMFILES; i++) {
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sprintf(fname, "%s/file%06d", test_dir, i);
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fd = open(fname, O_RDWR | O_CREAT | O_TRUNC, 0644);
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if (fd < 0) {
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printf("Warning (%s,%d), open(%s) failed.\n", __FILE__, __LINE__, fname);
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perror(fname);
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return EXIT_FAILURE;
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}
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close(fd);
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}
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/* sync to get the new inodes to hit the disk */
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sync();
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/* create the handles */
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for (i=0; i < NUMFILES; i++) {
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sprintf(fname, "%s/file%06d", test_dir, i);
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handle[i].fh.handle_bytes = MAX_HANDLE_SZ;
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ret = name_to_handle_at(AT_FDCWD, fname, &handle[i].fh, &mount_id, 0);
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if (ret < 0) {
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perror("name_to_handle");
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return EXIT_FAILURE;
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}
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}
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/* unlink the files */
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for (i=0; i < NUMFILES; i++) {
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sprintf(fname, "%s/file%06d", test_dir, i);
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ret = unlink(fname);
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if (ret < 0) {
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perror("unlink");
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return EXIT_FAILURE;
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}
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}
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/* sync to get log forced for unlink transactions to hit the disk */
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sync();
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/* sync once more FTW */
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sync();
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/*
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* now drop the caches so that unlinked inodes are reclaimed and
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* buftarg page cache is emptied so that the inode cluster has to be
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* fetched from disk again for the open_by_handle() call.
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*/
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ret = system("echo 3 > /proc/sys/vm/drop_caches");
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if (ret < 0) {
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perror("drop_caches");
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return EXIT_FAILURE;
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}
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/*
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* now try to open the files by the stored handles. Expecting ENOENT
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* for all of them.
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*/
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for (i=0; i < NUMFILES; i++) {
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errno = 0;
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fd = open_by_handle_at(mount_fd, &handle[i].fh, O_RDWR);
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if (fd < 0 && (errno == ENOENT || errno == ESTALE)) {
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continue;
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}
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if (fd >= 0) {
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printf("open_by_handle(%d) opened an unlinked file!\n", i);
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close(fd);
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} else
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printf("open_by_handle(%d) returned %d incorrectly on an unlinked file!\n", i, errno);
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failed++;
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}
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if (failed)
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return EXIT_FAILURE;
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return EXIT_SUCCESS;
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}
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