tests/sys/fs/fusefs/symlink.cc

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2019 The FreeBSD Foundation
   5  *
   6  * This software was developed by BFF Storage Systems, LLC under sponsorship
   7  * from the FreeBSD Foundation.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 extern "C" {
  32 #include <unistd.h>
  33 }
  34
  35 #include "mockfs.hh"
  36 #include "utils.hh"
  37
  38 using namespace testing;
  39
  40 class Symlink: public FuseTest {
  41 public:
  42
  43 void expect_symlink(uint64_t ino, const char *target, const char *relpath)
  44 {
  45         EXPECT_CALL(*m_mock, process(
  46                 ResultOf([=](auto in) {
  47                         const char *name = (const char*)in.body.bytes;
  48                         const char *linkname = name + strlen(name) + 1;
  49                         return (in.header.opcode == FUSE_SYMLINK &&
  50                                 (0 == strcmp(linkname, target)) &&
  51                                 (0 == strcmp(name, relpath)));
  52                 }, Eq(true)),
  53                 _)
  54         ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) {
  55                 SET_OUT_HEADER_LEN(out, entry);
  56                 out.body.entry.attr.mode = S_IFLNK | 0777;
  57                 out.body.entry.nodeid = ino;
  58                 out.body.entry.entry_valid = UINT64_MAX;
  59                 out.body.entry.attr_valid = UINT64_MAX;
  60         })));
  61 }
  62
  63 };
  64
  65 class Symlink_7_8: public FuseTest {
  66 public:
  67 virtual void SetUp() {
  68         m_kernel_minor_version = 8;
  69         FuseTest::SetUp();
  70 }
  71
  72 void expect_symlink(uint64_t ino, const char *target, const char *relpath)
  73 {
  74         EXPECT_CALL(*m_mock, process(
  75                 ResultOf([=](auto in) {
  76                         const char *name = (const char*)in.body.bytes;
  77                         const char *linkname = name + strlen(name) + 1;
  78                         return (in.header.opcode == FUSE_SYMLINK &&
  79                                 (0 == strcmp(linkname, target)) &&
  80                                 (0 == strcmp(name, relpath)));
  81                 }, Eq(true)),
  82                 _)
  83         ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) {
  84                 SET_OUT_HEADER_LEN(out, entry_7_8);
  85                 out.body.entry.attr.mode = S_IFLNK | 0777;
  86                 out.body.entry.nodeid = ino;
  87                 out.body.entry.entry_valid = UINT64_MAX;
  88                 out.body.entry.attr_valid = UINT64_MAX;
  89         })));
  90 }
  91
  92 };
  93
  94 /*
  95  * A successful symlink should clear the parent directory's attribute cache,
  96  * because the fuse daemon should update its mtime and ctime
  97  */
  98 TEST_F(Symlink, clear_attr_cache)
  99 {
 100         const char FULLPATH[] = "mountpoint/src";
 101         const char RELPATH[] = "src";
 102         const char dst[] = "dst";
 103         const uint64_t ino = 42;
 104         struct stat sb;
 105
 106         EXPECT_LOOKUP(1, RELPATH).WillOnce(Invoke(ReturnErrno(ENOENT)));
 107         EXPECT_CALL(*m_mock, process(
 108                 ResultOf([=](auto in) {
 109                         return (in.header.opcode == FUSE_GETATTR &&
 110                                 in.header.nodeid == 1);
 111                 }, Eq(true)),
 112                 _)
 113         ).Times(2)
 114         .WillRepeatedly(Invoke(ReturnImmediate([=](auto i __unused, auto& out) {
 115                 SET_OUT_HEADER_LEN(out, attr);
 116                 out.body.attr.attr.ino = 1;
 117                 out.body.attr.attr.mode = S_IFDIR | 0755;
 118                 out.body.attr.attr_valid = UINT64_MAX;
 119         })));
 120         expect_symlink(ino, dst, RELPATH);
 121
 122         EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno);
 123         EXPECT_EQ(0, symlink(dst, FULLPATH)) << strerror(errno);
 124         EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno);
 125 }
 126
 127 TEST_F(Symlink, enospc)
 128 {
 129         const char FULLPATH[] = "mountpoint/lnk";
 130         const char RELPATH[] = "lnk";
 131         const char dst[] = "dst";
 132
 133         EXPECT_LOOKUP(1, RELPATH).WillOnce(Invoke(ReturnErrno(ENOENT)));
 134
 135         EXPECT_CALL(*m_mock, process(
 136                 ResultOf([=](auto in) {
 137                         const char *name = (const char*)in.body.bytes;
 138                         const char *linkname = name + strlen(name) + 1;
 139                         return (in.header.opcode == FUSE_SYMLINK &&
 140                                 (0 == strcmp(linkname, dst)) &&
 141                                 (0 == strcmp(name, RELPATH)));
 142                 }, Eq(true)),
 143                 _)
 144         ).WillOnce(Invoke(ReturnErrno(ENOSPC)));
 145
 146         EXPECT_EQ(-1, symlink(dst, FULLPATH));
 147         EXPECT_EQ(ENOSPC, errno);
 148 }
 149
 150 TEST_F(Symlink, ok)
 151 {
 152         const char FULLPATH[] = "mountpoint/src";
 153         const char RELPATH[] = "src";
 154         const char dst[] = "dst";
 155         const uint64_t ino = 42;
 156
 157         EXPECT_LOOKUP(1, RELPATH).WillOnce(Invoke(ReturnErrno(ENOENT)));
 158         expect_symlink(ino, dst, RELPATH);
 159
 160         EXPECT_EQ(0, symlink(dst, FULLPATH)) << strerror(errno);
 161 }
 162
 163 TEST_F(Symlink_7_8, ok)
 164 {
 165         const char FULLPATH[] = "mountpoint/src";
 166         const char RELPATH[] = "src";
 167         const char dst[] = "dst";
 168         const uint64_t ino = 42;
 169
 170         EXPECT_LOOKUP(1, RELPATH).WillOnce(Invoke(ReturnErrno(ENOENT)));
 171         expect_symlink(ino, dst, RELPATH);
 172
 173         EXPECT_EQ(0, symlink(dst, FULLPATH)) << strerror(errno);
 174 }