1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 <sys/param.h> 33 34 #include <unistd.h> 35 } 36 37 #include "mockfs.hh" 38 #include "utils.hh" 39 40 using namespace testing; 41 42 class Readlink: public FuseTest { 43 public: 44 void expect_lookup(const char *relpath, uint64_t ino) 45 { 46 FuseTest::expect_lookup(relpath, ino, S_IFLNK | 0777, 0, 1); 47 } 48 void expect_readlink(uint64_t ino, ProcessMockerT r) 49 { 50 EXPECT_CALL(*m_mock, process( 51 ResultOf([=](auto in) { 52 return (in.header.opcode == FUSE_READLINK && 53 in.header.nodeid == ino); 54 }, Eq(true)), 55 _) 56 ).WillOnce(Invoke(r)); 57 } 58 59 }; 60 61 class PushSymlinksIn: public Readlink { 62 virtual void SetUp() { 63 m_push_symlinks_in = true; 64 Readlink::SetUp(); 65 } 66 }; 67 68 TEST_F(Readlink, eloop) 69 { 70 const char FULLPATH[] = "mountpoint/src"; 71 const char RELPATH[] = "src"; 72 const uint64_t ino = 42; 73 char buf[80]; 74 75 expect_lookup(RELPATH, ino); 76 expect_readlink(ino, ReturnErrno(ELOOP)); 77 78 EXPECT_EQ(-1, readlink(FULLPATH, buf, sizeof(buf))); 79 EXPECT_EQ(ELOOP, errno); 80 } 81 82 TEST_F(Readlink, ok) 83 { 84 const char FULLPATH[] = "mountpoint/src"; 85 const char RELPATH[] = "src"; 86 const char dst[] = "dst"; 87 const uint64_t ino = 42; 88 char buf[80]; 89 90 expect_lookup(RELPATH, ino); 91 expect_readlink(ino, ReturnImmediate([=](auto in __unused, auto& out) { 92 strlcpy(out.body.str, dst, sizeof(out.body.str)); 93 out.header.len = sizeof(out.header) + strlen(dst) + 1; 94 })); 95 96 EXPECT_EQ(static_cast<ssize_t>(strlen(dst)) + 1, 97 readlink(FULLPATH, buf, sizeof(buf))); 98 EXPECT_STREQ(dst, buf); 99 } 100 101 TEST_F(PushSymlinksIn, readlink) 102 { 103 const char FULLPATH[] = "mountpoint/src"; 104 const char RELPATH[] = "src"; 105 const char dst[] = "/dst"; 106 const uint64_t ino = 42; 107 char buf[MAXPATHLEN], wd[MAXPATHLEN], want[MAXPATHLEN]; 108 int len; 109 110 expect_lookup(RELPATH, ino); 111 expect_readlink(ino, ReturnImmediate([=](auto in __unused, auto& out) { 112 strlcpy(out.body.str, dst, sizeof(out.body.str)); 113 out.header.len = sizeof(out.header) + strlen(dst) + 1; 114 })); 115 116 ASSERT_NE(nullptr, getcwd(wd, sizeof(wd))) << strerror(errno); 117 len = snprintf(want, sizeof(want), "%s/mountpoint%s", wd, dst); 118 ASSERT_LE(0, len) << strerror(errno); 119 120 EXPECT_EQ(static_cast<ssize_t>(len) + 1, 121 readlink(FULLPATH, buf, sizeof(buf))); 122 EXPECT_STREQ(want, buf); 123 } 124