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_lookup(const char *relpath, uint64_t ino) 43 { 44 FuseTest::expect_lookup(relpath, ino, S_IFREG | 0644, 0, 1); 45 } 46 }; 47 48 TEST_F(Link, emlink) 49 { 50 const char FULLPATH[] = "mountpoint/lnk"; 51 const char RELPATH[] = "lnk"; 52 const char FULLDST[] = "mountpoint/dst"; 53 const char RELDST[] = "dst"; 54 uint64_t dst_ino = 42; 55 56 EXPECT_LOOKUP(1, RELPATH).WillOnce(Invoke(ReturnErrno(ENOENT))); 57 expect_lookup(RELDST, dst_ino); 58 59 EXPECT_CALL(*m_mock, process( 60 ResultOf([=](auto in) { 61 const char *name = (const char*)in->body.bytes 62 + sizeof(struct fuse_link_in); 63 return (in->header.opcode == FUSE_LINK && 64 in->body.link.oldnodeid == dst_ino && 65 (0 == strcmp(name, RELPATH))); 66 }, Eq(true)), 67 _) 68 ).WillOnce(Invoke(ReturnErrno(EMLINK))); 69 70 EXPECT_EQ(-1, link(FULLDST, FULLPATH)); 71 EXPECT_EQ(EMLINK, errno); 72 } 73 74 TEST_F(Link, ok) 75 { 76 const char FULLPATH[] = "mountpoint/src"; 77 const char RELPATH[] = "src"; 78 const char FULLDST[] = "mountpoint/dst"; 79 const char RELDST[] = "dst"; 80 const uint64_t ino = 42; 81 mode_t mode = S_IFREG | 0644; 82 struct stat sb; 83 84 EXPECT_LOOKUP(1, RELPATH).WillOnce(Invoke(ReturnErrno(ENOENT))); 85 EXPECT_LOOKUP(1, RELDST) 86 .WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto out) { 87 SET_OUT_HEADER_LEN(out, entry); 88 out->body.entry.attr.mode = mode; 89 out->body.entry.nodeid = ino; 90 out->body.entry.attr.nlink = 1; 91 out->body.entry.attr_valid = UINT64_MAX; 92 out->body.entry.entry_valid = UINT64_MAX; 93 }))); 94 95 EXPECT_CALL(*m_mock, process( 96 ResultOf([=](auto in) { 97 const char *name = (const char*)in->body.bytes 98 + sizeof(struct fuse_link_in); 99 return (in->header.opcode == FUSE_LINK && 100 in->body.link.oldnodeid == ino && 101 (0 == strcmp(name, RELPATH))); 102 }, Eq(true)), 103 _) 104 ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto out) { 105 SET_OUT_HEADER_LEN(out, entry); 106 out->body.entry.attr.mode = mode; 107 out->body.entry.nodeid = ino; 108 out->body.entry.attr.nlink = 2; 109 out->body.entry.attr_valid = UINT64_MAX; 110 out->body.entry.entry_valid = UINT64_MAX; 111 }))); 112 113 ASSERT_EQ(0, link(FULLDST, FULLPATH)) << strerror(errno); 114 // Check that the original file's nlink count has increased. 115 ASSERT_EQ(0, stat(FULLDST, &sb)) << strerror(errno); 116 EXPECT_EQ(2ul, sb.st_nlink); 117 } 118