tests/sys/fs/fusefs/link.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 Link: public FuseTest {
  41 public:
  42 void expect_link(uint64_t ino, const char *relpath, mode_t mode, uint32_t nlink)
  43 {
  44         EXPECT_CALL(*m_mock, process(
  45                 ResultOf([=](auto in) {
  46                         const char *name = (const char*)in->body.bytes
  47                                 + sizeof(struct fuse_link_in);
  48                         return (in->header.opcode == FUSE_LINK &&
  49                                 in->body.link.oldnodeid == ino &&
  50                                 (0 == strcmp(name, relpath)));
  51                 }, Eq(true)),
  52                 _)
  53         ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto out) {
  54                 SET_OUT_HEADER_LEN(out, entry);
  55                 out->body.entry.nodeid = ino;
  56                 out->body.entry.attr.mode = mode;
  57                 out->body.entry.attr.nlink = nlink;
  58                 out->body.entry.attr_valid = UINT64_MAX;
  59                 out->body.entry.entry_valid = UINT64_MAX;
  60         })));
  61 }
  62
  63 void expect_lookup(const char *relpath, uint64_t ino)
  64 {
  65         FuseTest::expect_lookup(relpath, ino, S_IFREG | 0644, 0, 1);
  66 }
  67 };
  68
  69 /*
  70  * A successful link should clear the parent directory's attribute cache,
  71  * because the fuse daemon should update its mtime and ctime
  72  */
  73 TEST_F(Link, clear_attr_cache)
  74 {
  75         const char FULLPATH[] = "mountpoint/src";
  76         const char RELPATH[] = "src";
  77         const char FULLDST[] = "mountpoint/dst";
  78         const char RELDST[] = "dst";
  79         const uint64_t ino = 42;
  80         mode_t mode = S_IFREG | 0644;
  81         struct stat sb;
  82
  83         EXPECT_LOOKUP(1, RELPATH).WillOnce(Invoke(ReturnErrno(ENOENT)));
  84         EXPECT_CALL(*m_mock, process(
  85                 ResultOf([=](auto in) {
  86                         return (in->header.opcode == FUSE_GETATTR &&
  87                                 in->header.nodeid == 1);
  88                 }, Eq(true)),
  89                 _)
  90         ).Times(2)
  91         .WillRepeatedly(Invoke(ReturnImmediate([=](auto i __unused, auto out) {
  92                 SET_OUT_HEADER_LEN(out, attr);
  93                 out->body.attr.attr.ino = 1;
  94                 out->body.attr.attr.mode = S_IFDIR | 0755;
  95                 out->body.attr.attr_valid = UINT64_MAX;
  96         })));
  97
  98         EXPECT_LOOKUP(1, RELDST)
  99         .WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto out) {
 100                 SET_OUT_HEADER_LEN(out, entry);
 101                 out->body.entry.attr.mode = mode;
 102                 out->body.entry.nodeid = ino;
 103                 out->body.entry.attr.nlink = 1;
 104                 out->body.entry.attr_valid = UINT64_MAX;
 105                 out->body.entry.entry_valid = UINT64_MAX;
 106         })));
 107         expect_link(ino, RELPATH, mode, 2);
 108
 109         EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno);
 110         EXPECT_EQ(0, link(FULLDST, FULLPATH)) << strerror(errno);
 111         EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno);
 112 }
 113
 114 TEST_F(Link, emlink)
 115 {
 116         const char FULLPATH[] = "mountpoint/lnk";
 117         const char RELPATH[] = "lnk";
 118         const char FULLDST[] = "mountpoint/dst";
 119         const char RELDST[] = "dst";
 120         uint64_t dst_ino = 42;
 121
 122         EXPECT_LOOKUP(1, RELPATH).WillOnce(Invoke(ReturnErrno(ENOENT)));
 123         expect_lookup(RELDST, dst_ino);
 124
 125         EXPECT_CALL(*m_mock, process(
 126                 ResultOf([=](auto in) {
 127                         const char *name = (const char*)in->body.bytes
 128                                 + sizeof(struct fuse_link_in);
 129                         return (in->header.opcode == FUSE_LINK &&
 130                                 in->body.link.oldnodeid == dst_ino &&
 131                                 (0 == strcmp(name, RELPATH)));
 132                 }, Eq(true)),
 133                 _)
 134         ).WillOnce(Invoke(ReturnErrno(EMLINK)));
 135
 136         EXPECT_EQ(-1, link(FULLDST, FULLPATH));
 137         EXPECT_EQ(EMLINK, errno);
 138 }
 139
 140 TEST_F(Link, ok)
 141 {
 142         const char FULLPATH[] = "mountpoint/src";
 143         const char RELPATH[] = "src";
 144         const char FULLDST[] = "mountpoint/dst";
 145         const char RELDST[] = "dst";
 146         const uint64_t ino = 42;
 147         mode_t mode = S_IFREG | 0644;
 148         struct stat sb;
 149
 150         EXPECT_LOOKUP(1, RELPATH).WillOnce(Invoke(ReturnErrno(ENOENT)));
 151         EXPECT_LOOKUP(1, RELDST)
 152         .WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto out) {
 153                 SET_OUT_HEADER_LEN(out, entry);
 154                 out->body.entry.attr.mode = mode;
 155                 out->body.entry.nodeid = ino;
 156                 out->body.entry.attr.nlink = 1;
 157                 out->body.entry.attr_valid = UINT64_MAX;
 158                 out->body.entry.entry_valid = UINT64_MAX;
 159         })));
 160         expect_link(ino, RELPATH, mode, 2);
 161
 162         ASSERT_EQ(0, link(FULLDST, FULLPATH)) << strerror(errno);
 163         // Check that the original file's nlink count has increased.
 164         ASSERT_EQ(0, stat(FULLDST, &sb)) << strerror(errno);
 165         EXPECT_EQ(2ul, sb.st_nlink);
 166 }