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Current Path: /usr/src/tests/sys/fs/fusefs

📁 ..
📄 Makefile(1.88 KB)
📄 access.cc(8.25 KB)
📄 allow_other.cc(7.55 KB)
📄 bmap.cc(4.62 KB)
📄 cache.cc(6.41 KB)
📄 copy_file_range.cc(11.67 KB)
📄 create.cc(12.79 KB)
📄 default_permissions.cc(40.48 KB)
📄 default_permissions_privileged.cc(3.75 KB)
📄 destroy.cc(4.81 KB)
📄 dev_fuse_poll.cc(6.62 KB)
📄 fifo.cc(5.39 KB)
📄 flush.cc(6.41 KB)
📄 forget.cc(4.7 KB)
📄 fsync.cc(7.84 KB)
📄 fsyncdir.cc(5.11 KB)
📄 getattr.cc(9.57 KB)
📄 interrupt.cc(21.73 KB)
📄 io.cc(13.88 KB)
📄 link.cc(7.13 KB)
📄 locks.cc(12.17 KB)
📄 lookup.cc(11.8 KB)
📄 lseek.cc(10.33 KB)
📄 mkdir.cc(6.82 KB)
📄 mknod.cc(6.68 KB)
📄 mockfs.cc(26.08 KB)
📄 mockfs.hh(12.04 KB)
📄 mount.cc(4.96 KB)
📄 nfs.cc(10.01 KB)
📄 notify.cc(14.47 KB)
📄 open.cc(7.18 KB)
📄 opendir.cc(4.64 KB)
📄 read.cc(24.69 KB)
📄 readdir.cc(9.23 KB)
📄 readlink.cc(3.62 KB)
📄 release.cc(6.35 KB)
📄 releasedir.cc(3.44 KB)
📄 rename.cc(8.87 KB)
📄 rmdir.cc(4.68 KB)
📄 setattr.cc(23.89 KB)
📄 statfs.cc(5.12 KB)
📄 symlink.cc(5.29 KB)
📄 unlink.cc(6.91 KB)
📄 utils.cc(17.41 KB)
📄 utils.hh(7.91 KB)
📄 write.cc(38.98 KB)
📄 xattr.cc(22.52 KB)

Editing: forget.cc

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2019 The FreeBSD Foundation
 *
 * This software was developed by BFF Storage Systems, LLC under sponsorship
 * from the FreeBSD Foundation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

extern "C" {
#include <sys/types.h>
#include <sys/sysctl.h>

#include <fcntl.h>
#include <semaphore.h>
#include <unistd.h>
}

#include "mockfs.hh"
#include "utils.hh"

using namespace testing;

const char reclaim_mib[] = "debug.try_reclaim_vnode";

class Forget: public FuseTest {
public:
void SetUp() {
	if (geteuid() != 0)
		GTEST_SKIP() << "Only root may use " << reclaim_mib;

if (-1 == sysctlbyname(reclaim_mib, NULL, 0, NULL, 0) &&
	    errno == ENOENT)
		GTEST_SKIP() << reclaim_mib << " is not available";

FuseTest::SetUp();
}

};

/*
 * When a fusefs vnode is reclaimed, it should send a FUSE_FORGET operation.
 */
TEST_F(Forget, ok)
{
	const char FULLPATH[] = "mountpoint/some_file.txt";
	const char RELPATH[] = "some_file.txt";
	uint64_t ino = 42;
	mode_t mode = S_IFREG | 0755;
	sem_t sem;
	int err;

ASSERT_EQ(0, sem_init(&sem, 0, 0)) << strerror(errno);

EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
	.Times(3)
	.WillRepeatedly(Invoke(
		ReturnImmediate([=](auto in __unused, auto& out) {
		SET_OUT_HEADER_LEN(out, entry);
		out.body.entry.attr.mode = mode;
		out.body.entry.nodeid = ino;
		out.body.entry.attr.nlink = 1;
		out.body.entry.attr_valid = UINT64_MAX;
	})));
	expect_forget(ino, 3, &sem);

/*
	 * access(2) the file to force a lookup.  Access it twice to double its
	 * lookup count.
	 */
	ASSERT_EQ(0, access(FULLPATH, F_OK)) << strerror(errno);
	ASSERT_EQ(0, access(FULLPATH, F_OK)) << strerror(errno);

err = sysctlbyname(reclaim_mib, NULL, 0, FULLPATH, sizeof(FULLPATH));
	ASSERT_EQ(0, err) << strerror(errno);

sem_wait(&sem);
	sem_destroy(&sem);
}

/*
 * When a directory is reclaimed, the names of its entries vanish from the
 * namecache
 */
TEST_F(Forget, invalidate_names)
{
	const char FULLFPATH[] = "mountpoint/some_dir/some_file.txt";
	const char FULLDPATH[] = "mountpoint/some_dir";
	const char DNAME[] = "some_dir";
	const char FNAME[] = "some_file.txt";
	uint64_t dir_ino = 42;
	uint64_t file_ino = 43;
	int err;

EXPECT_LOOKUP(FUSE_ROOT_ID, DNAME)
	.Times(2)
	.WillRepeatedly(Invoke(
		ReturnImmediate([=](auto in __unused, auto& out) {
		SET_OUT_HEADER_LEN(out, entry);
		out.body.entry.attr.mode = S_IFDIR | 0755;
		out.body.entry.nodeid = dir_ino;
		out.body.entry.attr.nlink = 2;
		out.body.entry.attr_valid = UINT64_MAX;
		out.body.entry.entry_valid = UINT64_MAX;
	})));

/* 
	 * Even though we don't reclaim FNAME and its entry is cacheable, we
	 * should get two lookups because the reclaim of DNAME will invalidate
	 * the cached FNAME entry.
	 */
	EXPECT_LOOKUP(dir_ino, FNAME)
	.Times(2)
	.WillRepeatedly(Invoke(
		ReturnImmediate([=](auto in __unused, auto& out) {
		SET_OUT_HEADER_LEN(out, entry);
		out.body.entry.attr.mode = S_IFREG | 0644;
		out.body.entry.nodeid = file_ino;
		out.body.entry.attr.nlink = 1;
		out.body.entry.attr_valid = UINT64_MAX;
		out.body.entry.entry_valid = UINT64_MAX;
	})));
	expect_forget(dir_ino, 1);

/* Access the file to cache its name */
	ASSERT_EQ(0, access(FULLFPATH, F_OK)) << strerror(errno);
	
	/* Reclaim the directory, invalidating its children from namecache */
	err = sysctlbyname(reclaim_mib, NULL, 0, FULLDPATH, sizeof(FULLDPATH));
	ASSERT_EQ(0, err) << strerror(errno);

/* Access the file again, causing another lookup */
	ASSERT_EQ(0, access(FULLFPATH, F_OK)) << strerror(errno);
}

003 File Manager

Editing: forget.cc

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