From b750101eb236130cf056c675997decbac904cc49 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:35:18 +0200 Subject: Adding upstream version 252.22. Signed-off-by: Daniel Baumann --- src/test/test-copy.c | 524 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 524 insertions(+) create mode 100644 src/test/test-copy.c (limited to 'src/test/test-copy.c') diff --git a/src/test/test-copy.c b/src/test/test-copy.c new file mode 100644 index 0000000..4fb69e3 --- /dev/null +++ b/src/test/test-copy.c @@ -0,0 +1,524 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include +#include + +#include "alloc-util.h" +#include "chase-symlinks.h" +#include "copy.h" +#include "fd-util.h" +#include "fileio.h" +#include "fs-util.h" +#include "hexdecoct.h" +#include "io-util.h" +#include "log.h" +#include "macro.h" +#include "mkdir.h" +#include "path-util.h" +#include "random-util.h" +#include "rm-rf.h" +#include "string-util.h" +#include "strv.h" +#include "tests.h" +#include "tmpfile-util.h" +#include "user-util.h" +#include "util.h" +#include "xattr-util.h" + +TEST(copy_file) { + _cleanup_free_ char *buf = NULL; + char fn[] = "/tmp/test-copy_file.XXXXXX"; + char fn_copy[] = "/tmp/test-copy_file.XXXXXX"; + size_t sz = 0; + int fd; + + fd = mkostemp_safe(fn); + assert_se(fd >= 0); + close(fd); + + fd = mkostemp_safe(fn_copy); + assert_se(fd >= 0); + close(fd); + + assert_se(write_string_file(fn, "foo bar bar bar foo", WRITE_STRING_FILE_CREATE) == 0); + + assert_se(copy_file(fn, fn_copy, 0, 0644, 0, 0, COPY_REFLINK) == 0); + + assert_se(read_full_file(fn_copy, &buf, &sz) == 0); + assert_se(streq(buf, "foo bar bar bar foo\n")); + assert_se(sz == 20); + + unlink(fn); + unlink(fn_copy); +} + +static bool read_file_and_streq(const char* filepath, const char* expected_contents) { + _cleanup_free_ char *buf = NULL; + + assert_se(read_full_file(filepath, &buf, NULL) == 0); + return streq(buf, expected_contents); +} + +TEST(copy_tree_replace_file) { + _cleanup_free_ char *src = NULL, *dst = NULL; + + assert_se(tempfn_random("/tmp/test-copy_file.XXXXXX", NULL, &src) >= 0); + assert_se(tempfn_random("/tmp/test-copy_file.XXXXXX", NULL, &dst) >= 0); + + assert_se(write_string_file(src, "bar bar", WRITE_STRING_FILE_CREATE) == 0); + assert_se(write_string_file(dst, "foo foo foo", WRITE_STRING_FILE_CREATE) == 0); + + /* The file exists- now overwrite original contents, and test the COPY_REPLACE flag. */ + + assert_se(copy_tree(src, dst, UID_INVALID, GID_INVALID, COPY_REFLINK) == -EEXIST); + + assert_se(read_file_and_streq(dst, "foo foo foo\n")); + + assert_se(copy_tree(src, dst, UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_REPLACE) == 0); + + assert_se(read_file_and_streq(dst, "bar bar\n")); +} + +TEST(copy_tree_replace_dirs) { + _cleanup_free_ char *src_path1 = NULL, *src_path2 = NULL, *dst_path1 = NULL, *dst_path2 = NULL; + _cleanup_(rm_rf_physical_and_freep) char *src_directory = NULL, *dst_directory = NULL; + const char *file1 = "foo_file", *file2 = "bar_file"; + + /* Create the random source/destination directories */ + assert_se(mkdtemp_malloc("/tmp/dirXXXXXX", &src_directory) >= 0); + assert_se(mkdtemp_malloc("/tmp/dirXXXXXX", &dst_directory) >= 0); + + /* Construct the source/destination filepaths (should have different dir name, but same file names within) */ + assert_se(src_path1 = path_join(src_directory, file1)); + assert_se(src_path2 = path_join(src_directory, file2)); + assert_se(dst_path1 = path_join(dst_directory, file1)); + assert_se(dst_path2 = path_join(dst_directory, file2)); + + /* Populate some data to differentiate the files. */ + assert_se(write_string_file(src_path1, "src file 1", WRITE_STRING_FILE_CREATE) == 0); + assert_se(write_string_file(src_path2, "src file 2", WRITE_STRING_FILE_CREATE) == 0); + + assert_se(write_string_file(dst_path1, "dest file 1", WRITE_STRING_FILE_CREATE) == 0); + assert_se(write_string_file(dst_path2, "dest file 2", WRITE_STRING_FILE_CREATE) == 0); + + /* Copying without COPY_REPLACE should fail because the destination file already exists. */ + assert_se(copy_tree(src_directory, dst_directory, UID_INVALID, GID_INVALID, COPY_REFLINK) == -EEXIST); + + { + assert_se(read_file_and_streq(src_path1, "src file 1\n")); + assert_se(read_file_and_streq(src_path2, "src file 2\n")); + assert_se(read_file_and_streq(dst_path1, "dest file 1\n")); + assert_se(read_file_and_streq(dst_path2, "dest file 2\n")); + } + + assert_se(copy_tree(src_directory, dst_directory, UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_REPLACE|COPY_MERGE) == 0); + + { + assert_se(read_file_and_streq(src_path1, "src file 1\n")); + assert_se(read_file_and_streq(src_path2, "src file 2\n")); + assert_se(read_file_and_streq(dst_path1, "src file 1\n")); + assert_se(read_file_and_streq(dst_path2, "src file 2\n")); + } +} + +TEST(copy_file_fd) { + char in_fn[] = "/tmp/test-copy-file-fd-XXXXXX"; + char out_fn[] = "/tmp/test-copy-file-fd-XXXXXX"; + _cleanup_close_ int in_fd = -1, out_fd = -1; + const char *text = "boohoo\nfoo\n\tbar\n"; + char buf[64] = {}; + + in_fd = mkostemp_safe(in_fn); + assert_se(in_fd >= 0); + out_fd = mkostemp_safe(out_fn); + assert_se(out_fd >= 0); + + assert_se(write_string_file(in_fn, text, WRITE_STRING_FILE_CREATE) == 0); + assert_se(copy_file_fd("/a/file/which/does/not/exist/i/guess", out_fd, COPY_REFLINK) < 0); + assert_se(copy_file_fd(in_fn, out_fd, COPY_REFLINK) >= 0); + assert_se(lseek(out_fd, SEEK_SET, 0) == 0); + + assert_se(read(out_fd, buf, sizeof buf) == (ssize_t) strlen(text)); + assert_se(streq(buf, text)); + + unlink(in_fn); + unlink(out_fn); +} + +TEST(copy_tree) { + char original_dir[] = "/tmp/test-copy_tree/"; + char copy_dir[] = "/tmp/test-copy_tree-copy/"; + char **files = STRV_MAKE("file", "dir1/file", "dir1/dir2/file", "dir1/dir2/dir3/dir4/dir5/file"); + char **symlinks = STRV_MAKE("link", "file", + "link2", "dir1/file"); + char **hardlinks = STRV_MAKE("hlink", "file", + "hlink2", "dir1/file"); + const char *unixsockp; + struct stat st; + int xattr_worked = -1; /* xattr support is optional in temporary directories, hence use it if we can, + * but don't fail if we can't */ + + (void) rm_rf(copy_dir, REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf(original_dir, REMOVE_ROOT|REMOVE_PHYSICAL); + + STRV_FOREACH(p, files) { + _cleanup_free_ char *f = NULL, *c = NULL; + int k; + + assert_se(f = path_join(original_dir, *p)); + + assert_se(write_string_file(f, "file", WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_MKDIR_0755) == 0); + + assert_se(base64mem(*p, strlen(*p), &c) >= 0); + + k = setxattr(f, "user.testxattr", c, strlen(c), 0); + assert_se(xattr_worked < 0 || ((k >= 0) == !!xattr_worked)); + xattr_worked = k >= 0; + } + + STRV_FOREACH_PAIR(ll, p, symlinks) { + _cleanup_free_ char *f = NULL, *l = NULL; + + assert_se(f = path_join(original_dir, *p)); + assert_se(l = path_join(original_dir, *ll)); + + assert_se(mkdir_parents(l, 0755) >= 0); + assert_se(symlink(f, l) == 0); + } + + STRV_FOREACH_PAIR(ll, p, hardlinks) { + _cleanup_free_ char *f = NULL, *l = NULL; + + assert_se(f = path_join(original_dir, *p)); + assert_se(l = path_join(original_dir, *ll)); + + assert_se(mkdir_parents(l, 0755) >= 0); + assert_se(link(f, l) == 0); + } + + unixsockp = strjoina(original_dir, "unixsock"); + assert_se(mknod(unixsockp, S_IFSOCK|0644, 0) >= 0); + + assert_se(copy_tree(original_dir, copy_dir, UID_INVALID, GID_INVALID, COPY_REFLINK|COPY_MERGE|COPY_HARDLINKS) == 0); + + STRV_FOREACH(p, files) { + _cleanup_free_ char *buf = NULL, *f = NULL, *c = NULL; + size_t sz; + int k; + + assert_se(f = path_join(copy_dir, *p)); + + assert_se(access(f, F_OK) == 0); + assert_se(read_full_file(f, &buf, &sz) == 0); + assert_se(streq(buf, "file\n")); + + k = lgetxattr_malloc(f, "user.testxattr", &c); + assert_se(xattr_worked < 0 || ((k >= 0) == !!xattr_worked)); + + if (k >= 0) { + _cleanup_free_ char *d = NULL; + + assert_se(base64mem(*p, strlen(*p), &d) >= 0); + assert_se(streq(d, c)); + } + } + + STRV_FOREACH_PAIR(ll, p, symlinks) { + _cleanup_free_ char *target = NULL, *f = NULL, *l = NULL; + + assert_se(f = strjoin(original_dir, *p)); + assert_se(l = strjoin(copy_dir, *ll)); + + assert_se(chase_symlinks(l, NULL, 0, &target, NULL) == 1); + assert_se(path_equal(f, target)); + } + + STRV_FOREACH_PAIR(ll, p, hardlinks) { + _cleanup_free_ char *f = NULL, *l = NULL; + struct stat a, b; + + assert_se(f = strjoin(copy_dir, *p)); + assert_se(l = strjoin(copy_dir, *ll)); + + assert_se(lstat(f, &a) >= 0); + assert_se(lstat(l, &b) >= 0); + + assert_se(a.st_ino == b.st_ino); + assert_se(a.st_dev == b.st_dev); + } + + unixsockp = strjoina(copy_dir, "unixsock"); + assert_se(stat(unixsockp, &st) >= 0); + assert_se(S_ISSOCK(st.st_mode)); + + assert_se(copy_tree(original_dir, copy_dir, UID_INVALID, GID_INVALID, COPY_REFLINK) < 0); + assert_se(copy_tree("/tmp/inexistent/foo/bar/fsdoi", copy_dir, UID_INVALID, GID_INVALID, COPY_REFLINK) < 0); + + (void) rm_rf(copy_dir, REMOVE_ROOT|REMOVE_PHYSICAL); + (void) rm_rf(original_dir, REMOVE_ROOT|REMOVE_PHYSICAL); +} + +TEST(copy_bytes) { + _cleanup_close_pair_ int pipefd[2] = {-1, -1}; + _cleanup_close_ int infd = -1; + int r, r2; + char buf[1024], buf2[1024]; + + infd = open("/usr/lib/os-release", O_RDONLY|O_CLOEXEC); + if (infd < 0) + infd = open("/etc/os-release", O_RDONLY|O_CLOEXEC); + assert_se(infd >= 0); + + assert_se(pipe2(pipefd, O_CLOEXEC) == 0); + + r = copy_bytes(infd, pipefd[1], UINT64_MAX, 0); + assert_se(r == 0); + + r = read(pipefd[0], buf, sizeof(buf)); + assert_se(r >= 0); + + assert_se(lseek(infd, 0, SEEK_SET) == 0); + r2 = read(infd, buf2, sizeof(buf2)); + assert_se(r == r2); + + assert_se(strneq(buf, buf2, r)); + + /* test copy_bytes with invalid descriptors */ + r = copy_bytes(pipefd[0], pipefd[0], 1, 0); + assert_se(r == -EBADF); + + r = copy_bytes(pipefd[1], pipefd[1], 1, 0); + assert_se(r == -EBADF); + + r = copy_bytes(pipefd[1], infd, 1, 0); + assert_se(r == -EBADF); +} + +static void test_copy_bytes_regular_file_one(const char *src, bool try_reflink, uint64_t max_bytes) { + char fn2[] = "/tmp/test-copy-file-XXXXXX"; + char fn3[] = "/tmp/test-copy-file-XXXXXX"; + _cleanup_close_ int fd = -1, fd2 = -1, fd3 = -1; + int r; + struct stat buf, buf2, buf3; + + log_info("%s try_reflink=%s max_bytes=%" PRIu64, __func__, yes_no(try_reflink), max_bytes); + + fd = open(src, O_RDONLY | O_CLOEXEC | O_NOCTTY); + assert_se(fd >= 0); + + fd2 = mkostemp_safe(fn2); + assert_se(fd2 >= 0); + + fd3 = mkostemp_safe(fn3); + assert_se(fd3 >= 0); + + r = copy_bytes(fd, fd2, max_bytes, try_reflink ? COPY_REFLINK : 0); + if (max_bytes == UINT64_MAX) + assert_se(r == 0); + else + assert_se(IN_SET(r, 0, 1)); + + assert_se(fstat(fd, &buf) == 0); + assert_se(fstat(fd2, &buf2) == 0); + assert_se((uint64_t) buf2.st_size == MIN((uint64_t) buf.st_size, max_bytes)); + + if (max_bytes < UINT64_MAX) + /* Make sure the file is now higher than max_bytes */ + assert_se(ftruncate(fd2, max_bytes + 1) == 0); + + assert_se(lseek(fd2, 0, SEEK_SET) == 0); + + r = copy_bytes(fd2, fd3, max_bytes, try_reflink ? COPY_REFLINK : 0); + if (max_bytes == UINT64_MAX) + assert_se(r == 0); + else + /* We cannot distinguish between the input being exactly max_bytes + * or longer than max_bytes (without trying to read one more byte, + * or calling stat, or FION_READ, etc, and we don't want to do any + * of that). So we expect "truncation" since we know that file we + * are copying is exactly max_bytes bytes. */ + assert_se(r == 1); + + assert_se(fstat(fd3, &buf3) == 0); + + if (max_bytes == UINT64_MAX) + assert_se(buf3.st_size == buf2.st_size); + else + assert_se((uint64_t) buf3.st_size == max_bytes); + + unlink(fn2); + unlink(fn3); +} + +TEST(copy_bytes_regular_file) { + test_copy_bytes_regular_file_one(saved_argv[0], false, UINT64_MAX); + test_copy_bytes_regular_file_one(saved_argv[0], true, UINT64_MAX); + test_copy_bytes_regular_file_one(saved_argv[0], false, 1000); /* smaller than copy buffer size */ + test_copy_bytes_regular_file_one(saved_argv[0], true, 1000); + test_copy_bytes_regular_file_one(saved_argv[0], false, 32000); /* larger than copy buffer size */ + test_copy_bytes_regular_file_one(saved_argv[0], true, 32000); +} + +TEST(copy_atomic) { + _cleanup_(rm_rf_physical_and_freep) char *p = NULL; + const char *q; + int r; + + assert_se(mkdtemp_malloc(NULL, &p) >= 0); + + q = strjoina(p, "/fstab"); + + r = copy_file_atomic("/etc/fstab", q, 0644, 0, 0, COPY_REFLINK); + if (r == -ENOENT || ERRNO_IS_PRIVILEGE(r)) + return; + + assert_se(copy_file_atomic("/etc/fstab", q, 0644, 0, 0, COPY_REFLINK) == -EEXIST); + + assert_se(copy_file_atomic("/etc/fstab", q, 0644, 0, 0, COPY_REPLACE) >= 0); +} + +TEST(copy_proc) { + _cleanup_(rm_rf_physical_and_freep) char *p = NULL; + _cleanup_free_ char *f = NULL, *a = NULL, *b = NULL; + + /* Check if copying data from /proc/ works correctly, i.e. let's see if https://lwn.net/Articles/846403/ is a problem for us */ + + assert_se(mkdtemp_malloc(NULL, &p) >= 0); + assert_se(f = path_join(p, "version")); + assert_se(copy_file("/proc/version", f, 0, MODE_INVALID, 0, 0, 0) >= 0); + + assert_se(read_one_line_file("/proc/version", &a) >= 0); + assert_se(read_one_line_file(f, &b) >= 0); + assert_se(streq(a, b)); + assert_se(!isempty(a)); +} + +TEST_RET(copy_holes) { + char fn[] = "/var/tmp/test-copy-hole-fd-XXXXXX"; + char fn_copy[] = "/var/tmp/test-copy-hole-fd-XXXXXX"; + struct stat stat; + off_t blksz; + int r, fd, fd_copy; + char *buf; + + fd = mkostemp_safe(fn); + assert_se(fd >= 0); + + fd_copy = mkostemp_safe(fn_copy); + assert_se(fd_copy >= 0); + + r = RET_NERRNO(fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 1)); + if (ERRNO_IS_NOT_SUPPORTED(r)) + return log_tests_skipped("Filesystem doesn't support hole punching"); + assert_se(r >= 0); + + assert_se(fstat(fd, &stat) >= 0); + blksz = stat.st_blksize; + buf = alloca_safe(blksz); + memset(buf, 1, blksz); + + /* We need to make sure to create hole in multiples of the block size, otherwise filesystems (btrfs) + * might silently truncate/extend the holes. */ + + assert_se(lseek(fd, blksz, SEEK_CUR) >= 0); + assert_se(write(fd, buf, blksz) >= 0); + assert_se(lseek(fd, 0, SEEK_END) == 2 * blksz); + /* Only ftruncate() can create holes at the end of a file. */ + assert_se(ftruncate(fd, 3 * blksz) >= 0); + assert_se(lseek(fd, 0, SEEK_SET) >= 0); + + assert_se(copy_bytes(fd, fd_copy, UINT64_MAX, COPY_HOLES) >= 0); + + /* Test that the hole starts at the beginning of the file. */ + assert_se(lseek(fd_copy, 0, SEEK_HOLE) == 0); + /* Test that the hole has the expected size. */ + assert_se(lseek(fd_copy, 0, SEEK_DATA) == blksz); + assert_se(lseek(fd_copy, blksz, SEEK_HOLE) == 2 * blksz); + assert_se(lseek(fd_copy, 2 * blksz, SEEK_DATA) < 0 && errno == ENXIO); + + /* Test that the copied file has the correct size. */ + assert_se(fstat(fd_copy, &stat) >= 0); + assert_se(stat.st_size == 3 * blksz); + + close(fd); + close(fd_copy); + + unlink(fn); + unlink(fn_copy); + + return 0; +} + +TEST_RET(copy_holes_with_gaps) { + _cleanup_(rm_rf_physical_and_freep) char *t = NULL; + _cleanup_close_ int tfd = -EBADF, fd = -EBADF, fd_copy = -EBADF; + struct stat st; + off_t blksz; + char *buf; + int r; + + assert_se(mkdtemp_malloc(NULL, &t) >= 0); + assert_se((tfd = open(t, O_DIRECTORY | O_CLOEXEC)) >= 0); + assert_se((fd = openat(tfd, "src", O_CREAT | O_RDWR, 0600)) >= 0); + assert_se((fd_copy = openat(tfd, "dst", O_CREAT | O_WRONLY, 0600)) >= 0); + + assert_se(fstat(fd, &st) >= 0); + blksz = st.st_blksize; + buf = alloca_safe(blksz); + memset(buf, 1, blksz); + + /* Create a file with: + * - hole of 1 block + * - data of 2 block + * - hole of 2 blocks + * - data of 1 block + * + * Since sparse files are based on blocks and not bytes, we need to make + * sure that the holes are aligned to the block size. + */ + + r = RET_NERRNO(fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, blksz)); + if (ERRNO_IS_NOT_SUPPORTED(r)) + return log_tests_skipped("Filesystem doesn't support hole punching"); + + assert_se(lseek(fd, blksz, SEEK_CUR) >= 0); + assert_se(loop_write(fd, buf, blksz, 0) >= 0); + assert_se(loop_write(fd, buf, blksz, 0) >= 0); + assert_se(lseek(fd, 2 * blksz, SEEK_CUR) >= 0); + assert_se(loop_write(fd, buf, blksz, 0) >= 0); + assert_se(lseek(fd, 0, SEEK_SET) >= 0); + assert_se(fsync(fd) >= 0); + + /* Copy to the start of the second hole */ + assert_se(copy_bytes(fd, fd_copy, 3 * blksz, COPY_HOLES) >= 0); + assert_se(fstat(fd_copy, &st) >= 0); + assert_se(st.st_size == 3 * blksz); + + /* Copy to the middle of the second hole */ + assert_se(lseek(fd, 0, SEEK_SET) >= 0); + assert_se(lseek(fd_copy, 0, SEEK_SET) >= 0); + assert_se(ftruncate(fd_copy, 0) >= 0); + assert_se(copy_bytes(fd, fd_copy, 4 * blksz, COPY_HOLES) >= 0); + assert_se(fstat(fd_copy, &st) >= 0); + assert_se(st.st_size == 4 * blksz); + + /* Copy to the end of the second hole */ + assert_se(lseek(fd, 0, SEEK_SET) >= 0); + assert_se(lseek(fd_copy, 0, SEEK_SET) >= 0); + assert_se(ftruncate(fd_copy, 0) >= 0); + assert_se(copy_bytes(fd, fd_copy, 5 * blksz, COPY_HOLES) >= 0); + assert_se(fstat(fd_copy, &st) >= 0); + assert_se(st.st_size == 5 * blksz); + + /* Copy everything */ + assert_se(lseek(fd, 0, SEEK_SET) >= 0); + assert_se(lseek(fd_copy, 0, SEEK_SET) >= 0); + assert_se(ftruncate(fd_copy, 0) >= 0); + assert_se(copy_bytes(fd, fd_copy, UINT64_MAX, COPY_HOLES) >= 0); + assert_se(fstat(fd_copy, &st) >= 0); + assert_se(st.st_size == 6 * blksz); + + return 0; +} + +DEFINE_TEST_MAIN(LOG_DEBUG); 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