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 * $FreeBSD$ 31 */ 32 33 extern "C" { 34 #include <sys/param.h> 35 36 #include <unistd.h> 37 } 38 39 #include "mockfs.hh" 40 #include "utils.hh" 41 42 using namespace testing; 43 44 class Readlink: public FuseTest { 45 public: 46 void expect_lookup(const char *relpath, uint64_t ino) 47 { 48 FuseTest::expect_lookup(relpath, ino, S_IFLNK | 0777, 0, 1); 49 } 50 void expect_readlink(uint64_t ino, ProcessMockerT r) 51 { 52 EXPECT_CALL(*m_mock, process( 53 ResultOf([=](auto in) { 54 return (in.header.opcode == FUSE_READLINK && 55 in.header.nodeid == ino); 56 }, Eq(true)), 57 _) 58 ).WillOnce(Invoke(r)); 59 } 60 61 }; 62 63 class PushSymlinksIn: public Readlink { 64 virtual void SetUp() { 65 m_push_symlinks_in = true; 66 Readlink::SetUp(); 67 } 68 }; 69 70 TEST_F(Readlink, eloop) 71 { 72 const char FULLPATH[] = "mountpoint/src"; 73 const char RELPATH[] = "src"; 74 const uint64_t ino = 42; 75 char buf[80]; 76 77 expect_lookup(RELPATH, ino); 78 expect_readlink(ino, ReturnErrno(ELOOP)); 79 80 EXPECT_EQ(-1, readlink(FULLPATH, buf, sizeof(buf))); 81 EXPECT_EQ(ELOOP, errno); 82 } 83 84 TEST_F(Readlink, ok) 85 { 86 const char FULLPATH[] = "mountpoint/src"; 87 const char RELPATH[] = "src"; 88 const char dst[] = "dst"; 89 const uint64_t ino = 42; 90 char buf[80]; 91 92 expect_lookup(RELPATH, ino); 93 expect_readlink(ino, ReturnImmediate([=](auto in __unused, auto& out) { 94 strlcpy(out.body.str, dst, sizeof(out.body.str)); 95 out.header.len = sizeof(out.header) + strlen(dst) + 1; 96 })); 97 98 EXPECT_EQ(static_cast<ssize_t>(strlen(dst)) + 1, 99 readlink(FULLPATH, buf, sizeof(buf))); 100 EXPECT_STREQ(dst, buf); 101 } 102 103 TEST_F(PushSymlinksIn, readlink) 104 { 105 const char FULLPATH[] = "mountpoint/src"; 106 const char RELPATH[] = "src"; 107 const char dst[] = "/dst"; 108 const uint64_t ino = 42; 109 char buf[MAXPATHLEN], wd[MAXPATHLEN], want[MAXPATHLEN]; 110 int len; 111 112 expect_lookup(RELPATH, ino); 113 expect_readlink(ino, ReturnImmediate([=](auto in __unused, auto& out) { 114 strlcpy(out.body.str, dst, sizeof(out.body.str)); 115 out.header.len = sizeof(out.header) + strlen(dst) + 1; 116 })); 117 118 ASSERT_NE(nullptr, getcwd(wd, sizeof(wd))) << strerror(errno); 119 len = snprintf(want, sizeof(want), "%s/mountpoint%s", wd, dst); 120 ASSERT_LE(0, len) << strerror(errno); 121 122 EXPECT_EQ(static_cast<ssize_t>(len) + 1, 123 readlink(FULLPATH, buf, sizeof(buf))); 124 EXPECT_STREQ(want, buf); 125 } 126