X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fwin32.c;h=06fd74d6371fc1ffe1ad94c4ddb1f42bed1c7cab;hp=3a914943ef70d4be1e2e8e7a163e2642aca7b447;hb=4d09d61542de5f16137192b6d0a9cac1bbf4f468;hpb=f2db311f527e6037c836cf1b14debb841e09b440 diff --git a/src/win32.c b/src/win32.c index 3a914943..06fd74d6 100644 --- a/src/win32.c +++ b/src/win32.c @@ -23,15 +23,14 @@ * along with wimlib; if not, see http://www.gnu.org/licenses/. */ -#ifndef __WIN32__ -# error "This file contains Windows code" -#endif +#ifdef __WIN32__ #include "config.h" #include #include #include -#include /* shlwapi.h for PathMatchSpecW() */ +#include /* for PathMatchSpecW() */ +#include /* for SetSecurityInfo() */ #ifdef ERROR /* windows.h defines this */ # undef ERROR #endif @@ -41,11 +40,14 @@ #include "lookup_table.h" #include "security.h" #include "endianness.h" +#include "buffer_io.h" +#include #include #define MAX_GET_SD_ACCESS_DENIED_WARNINGS 1 #define MAX_GET_SACL_PRIV_NOTHELD_WARNINGS 1 +#define MAX_CREATE_HARD_LINK_WARNINGS 5 struct win32_capture_state { unsigned long num_get_sd_access_denied; unsigned long num_get_sacl_priv_notheld; @@ -54,6 +56,28 @@ struct win32_capture_state { #define MAX_SET_SD_ACCESS_DENIED_WARNINGS 1 #define MAX_SET_SACL_PRIV_NOTHELD_WARNINGS 1 +#ifdef ENABLE_ERROR_MESSAGES +static void +win32_error(u32 err_code) +{ + wchar_t *buffer; + DWORD nchars; + nchars = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | + FORMAT_MESSAGE_ALLOCATE_BUFFER, + NULL, err_code, 0, + (wchar_t*)&buffer, 0, NULL); + if (nchars == 0) { + ERROR("Error printing error message! " + "Computer will self-destruct in 3 seconds."); + } else { + ERROR("Win32 error: %ls", buffer); + LocalFree(buffer); + } +} +#else /* ENABLE_ERROR_MESSAGES */ +# define win32_error(err_code) +#endif /* !ENABLE_ERROR_MESSAGES */ + /* Pointers to functions that are not available on all targetted versions of * Windows (XP and later). NOTE: The WINAPI annotations seem to be important; I * assume it specifies a certain calling convention. */ @@ -129,32 +153,6 @@ L"If you are not running this program as the administrator, you may\n" " `wimlib-imagex apply' with the --no-acls flag instead.\n" ; -#ifdef ENABLE_ERROR_MESSAGES -void -win32_error(u32 err_code) -{ - wchar_t *buffer; - DWORD nchars; - nchars = FormatMessageW(FORMAT_MESSAGE_FROM_SYSTEM | - FORMAT_MESSAGE_ALLOCATE_BUFFER, - NULL, err_code, 0, - (wchar_t*)&buffer, 0, NULL); - if (nchars == 0) { - ERROR("Error printing error message! " - "Computer will self-destruct in 3 seconds."); - } else { - ERROR("Win32 error: %ls", buffer); - LocalFree(buffer); - } -} - -void -win32_error_last() -{ - win32_error(GetLastError()); -} -#endif - static HANDLE win32_open_existing_file(const wchar_t *path, DWORD dwDesiredAccess) { @@ -175,31 +173,219 @@ win32_open_file_data_only(const wchar_t *path) } int -win32_read_file(const wchar_t *filename, - void *handle, u64 offset, size_t size, void *buf) +read_win32_file_prefix(const struct wim_lookup_table_entry *lte, + u64 size, + consume_data_callback_t cb, + void *ctx_or_buf, + int _ignored_flags) { - HANDLE h = handle; + int ret = 0; + void *out_buf; DWORD err; - DWORD bytesRead; - LARGE_INTEGER liOffset = {.QuadPart = offset}; + u64 bytes_remaining; + + HANDLE hFile = win32_open_file_data_only(lte->file_on_disk); + if (hFile == INVALID_HANDLE_VALUE) { + err = GetLastError(); + ERROR("Failed to open \"%ls\"", lte->file_on_disk); + win32_error(err); + return WIMLIB_ERR_OPEN; + } + + if (cb) + out_buf = alloca(WIM_CHUNK_SIZE); + else + out_buf = ctx_or_buf; - wimlib_assert(size <= 0xffffffff); + bytes_remaining = size; + while (bytes_remaining) { + DWORD bytesToRead, bytesRead; - if (SetFilePointerEx(h, liOffset, NULL, FILE_BEGIN)) - if (ReadFile(h, buf, size, &bytesRead, NULL) && bytesRead == size) - return 0; - err = GetLastError(); - ERROR("Error reading \"%ls\"", filename); - win32_error(err); - return WIMLIB_ERR_READ; + bytesToRead = min(WIM_CHUNK_SIZE, bytes_remaining); + if (!ReadFile(hFile, out_buf, bytesToRead, &bytesRead, NULL) || + bytesRead != bytesToRead) + { + err = GetLastError(); + ERROR("Failed to read data from \"%ls\"", lte->file_on_disk); + win32_error(err); + ret = WIMLIB_ERR_READ; + break; + } + bytes_remaining -= bytesRead; + if (cb) { + ret = (*cb)(out_buf, bytesRead, ctx_or_buf); + if (ret) + break; + } else { + out_buf += bytesRead; + } + } + CloseHandle(hFile); + return ret; } -void -win32_close_file(void *handle) +struct win32_encrypted_read_ctx { + consume_data_callback_t read_prefix_cb; + void *read_prefix_ctx_or_buf; + int wimlib_err_code; + void *buf; + size_t buf_filled; + u64 bytes_remaining; +}; + +static DWORD WINAPI +win32_encrypted_export_cb(unsigned char *_data, void *_ctx, unsigned long len) +{ + const void *data = _data; + struct win32_encrypted_read_ctx *ctx = _ctx; + int ret; + + DEBUG("len = %lu", len); + if (ctx->read_prefix_cb) { + /* The length of the buffer passed to the ReadEncryptedFileRaw() + * export callback is undocumented, so we assume it may be of + * arbitrary size. */ + size_t bytes_to_buffer = min(ctx->bytes_remaining - ctx->buf_filled, + len); + while (bytes_to_buffer) { + size_t bytes_to_copy_to_buf = + min(bytes_to_buffer, WIM_CHUNK_SIZE - ctx->buf_filled); + + memcpy(ctx->buf + ctx->buf_filled, data, + bytes_to_copy_to_buf); + ctx->buf_filled += bytes_to_copy_to_buf; + data += bytes_to_copy_to_buf; + bytes_to_buffer -= bytes_to_copy_to_buf; + + if (ctx->buf_filled == WIM_CHUNK_SIZE || + ctx->buf_filled == ctx->bytes_remaining) + { + ret = (*ctx->read_prefix_cb)(ctx->buf, + ctx->buf_filled, + ctx->read_prefix_ctx_or_buf); + if (ret) { + ctx->wimlib_err_code = ret; + /* Shouldn't matter what error code is returned + * here, as long as it isn't ERROR_SUCCESS. */ + return ERROR_READ_FAULT; + } + ctx->bytes_remaining -= ctx->buf_filled; + ctx->buf_filled = 0; + } + } + } else { + size_t len_to_copy = min(len, ctx->bytes_remaining); + memcpy(ctx->read_prefix_ctx_or_buf, data, len_to_copy); + ctx->bytes_remaining -= len_to_copy; + ctx->read_prefix_ctx_or_buf += len_to_copy; + } + return ERROR_SUCCESS; +} + +int +read_win32_encrypted_file_prefix(const struct wim_lookup_table_entry *lte, + u64 size, + consume_data_callback_t cb, + void *ctx_or_buf, + int _ignored_flags) +{ + struct win32_encrypted_read_ctx export_ctx; + DWORD err; + void *file_ctx; + int ret; + + DEBUG("Reading %"PRIu64" bytes from encryted file \"%ls\"", + size, lte->file_on_disk); + + export_ctx.read_prefix_cb = cb; + export_ctx.read_prefix_ctx_or_buf = ctx_or_buf; + export_ctx.wimlib_err_code = 0; + if (cb) { + export_ctx.buf = MALLOC(WIM_CHUNK_SIZE); + if (!export_ctx.buf) + return WIMLIB_ERR_NOMEM; + } else { + export_ctx.buf = NULL; + } + export_ctx.buf_filled = 0; + export_ctx.bytes_remaining = size; + + err = OpenEncryptedFileRawW(lte->file_on_disk, 0, &file_ctx); + if (err != ERROR_SUCCESS) { + ERROR("Failed to open encrypted file \"%ls\" for raw read", + lte->file_on_disk); + win32_error(err); + ret = WIMLIB_ERR_OPEN; + goto out_free_buf; + } + err = ReadEncryptedFileRaw(win32_encrypted_export_cb, + &export_ctx, file_ctx); + if (err != ERROR_SUCCESS) { + ERROR("Failed to read encrypted file \"%ls\"", + lte->file_on_disk); + win32_error(err); + ret = export_ctx.wimlib_err_code; + if (ret == 0) + ret = WIMLIB_ERR_READ; + } else if (export_ctx.bytes_remaining != 0) { + ERROR("Only could read %"PRIu64" of %"PRIu64" bytes from " + "encryted file \"%ls\"", + size - export_ctx.bytes_remaining, size, + lte->file_on_disk); + ret = WIMLIB_ERR_READ; + } else { + ret = 0; + } + CloseEncryptedFileRaw(file_ctx); +out_free_buf: + FREE(export_ctx.buf); + return ret; +} + +/* Given a path, which may not yet exist, get a set of flags that describe the + * features of the volume the path is on. */ +static int +win32_get_vol_flags(const wchar_t *path, unsigned *vol_flags_ret) { - CloseHandle((HANDLE)handle); + wchar_t *volume; + BOOL bret; + DWORD vol_flags; + + if (path[0] != L'\0' && path[0] != L'\\' && + path[0] != L'/' && path[1] == L':') + { + /* Path starts with a drive letter; use it. */ + volume = alloca(4 * sizeof(wchar_t)); + volume[0] = path[0]; + volume[1] = path[1]; + volume[2] = L'\\'; + volume[3] = L'\0'; + } else { + /* Path does not start with a drive letter; use the volume of + * the current working directory. */ + volume = NULL; + } + bret = GetVolumeInformationW(volume, /* lpRootPathName */ + NULL, /* lpVolumeNameBuffer */ + 0, /* nVolumeNameSize */ + NULL, /* lpVolumeSerialNumber */ + NULL, /* lpMaximumComponentLength */ + &vol_flags, /* lpFileSystemFlags */ + NULL, /* lpFileSystemNameBuffer */ + 0); /* nFileSystemNameSize */ + if (!bret) { + DWORD err = GetLastError(); + WARNING("Failed to get volume information for path \"%ls\"", path); + win32_error(err); + vol_flags = 0xffffffff; + } + + DEBUG("using vol_flags = %x", vol_flags); + *vol_flags_ret = vol_flags; + return 0; } + static u64 FILETIME_to_u64(const FILETIME *ft) { @@ -210,17 +396,31 @@ static int win32_get_short_name(struct wim_dentry *dentry, const wchar_t *path) { WIN32_FIND_DATAW dat; - if (FindFirstFileW(path, &dat) && dat.cAlternateFileName[0] != L'\0') { - size_t short_name_nbytes = wcslen(dat.cAlternateFileName) * - sizeof(wchar_t); - size_t n = short_name_nbytes + sizeof(wchar_t); - dentry->short_name = MALLOC(n); - if (!dentry->short_name) - return WIMLIB_ERR_NOMEM; - memcpy(dentry->short_name, dat.cAlternateFileName, n); - dentry->short_name_nbytes = short_name_nbytes; + HANDLE hFind; + int ret = 0; + + /* If we can't read the short filename for some reason, we just ignore + * the error and assume the file has no short name. I don't think this + * should be an issue, since the short names are essentially obsolete + * anyway. */ + hFind = FindFirstFileW(path, &dat); + if (hFind != INVALID_HANDLE_VALUE) { + if (dat.cAlternateFileName[0] != L'\0') { + DEBUG("\"%ls\": short name \"%ls\"", path, dat.cAlternateFileName); + size_t short_name_nbytes = wcslen(dat.cAlternateFileName) * + sizeof(wchar_t); + size_t n = short_name_nbytes + sizeof(wchar_t); + dentry->short_name = MALLOC(n); + if (dentry->short_name) { + memcpy(dentry->short_name, dat.cAlternateFileName, n); + dentry->short_name_nbytes = short_name_nbytes; + } else { + ret = WIMLIB_ERR_NOMEM; + } + } + FindClose(hFind); } - return 0; + return ret; } static int @@ -306,12 +506,9 @@ static int win32_build_dentry_tree_recursive(struct wim_dentry **root_ret, wchar_t *path, size_t path_num_chars, - struct wim_lookup_table *lookup_table, - struct sd_set *sd_set, - const struct capture_config *config, - int add_image_flags, - wimlib_progress_func_t progress_func, - struct win32_capture_state *state); + struct add_image_params *params, + struct win32_capture_state *state, + unsigned vol_flags); /* Reads the directory entries of directory using a Win32 API and recursively * calls win32_build_dentry_tree() on them. */ @@ -319,18 +516,17 @@ static int win32_recurse_directory(struct wim_dentry *root, wchar_t *dir_path, size_t dir_path_num_chars, - struct wim_lookup_table *lookup_table, - struct sd_set *sd_set, - const struct capture_config *config, - int add_image_flags, - wimlib_progress_func_t progress_func, - struct win32_capture_state *state) + struct add_image_params *params, + struct win32_capture_state *state, + unsigned vol_flags) { WIN32_FIND_DATAW dat; HANDLE hFind; DWORD err; int ret; + DEBUG("Recurse to directory \"%ls\"", dir_path); + /* Begin reading the directory by calling FindFirstFileW. Unlike UNIX * opendir(), FindFirstFileW has file globbing built into it. But this * isn't what we actually want, so just add a dummy glob to get all @@ -371,12 +567,9 @@ win32_recurse_directory(struct wim_dentry *root, ret = win32_build_dentry_tree_recursive(&child, dir_path, path_len, - lookup_table, - sd_set, - config, - add_image_flags, - progress_func, - state); + params, + state, + vol_flags); dir_path[dir_path_num_chars] = L'\0'; if (ret) goto out_find_close; @@ -395,94 +588,292 @@ out_find_close: return ret; } -/* Load a reparse point into a WIM inode. It is just stored in memory. - * - * @hFile: Open handle to a reparse point, with permission to read the reparse - * data. - * - * @inode: WIM inode for the reparse point. - * - * @lookup_table: Stream lookup table for the WIM; an entry will be added to it - * for the reparse point unless an entry already exists for - * the exact same data stream. +int +win32_get_file_and_vol_ids(const wchar_t *path, u64 *ino_ret, u64 *dev_ret) +{ + HANDLE hFile; + DWORD err; + BY_HANDLE_FILE_INFORMATION file_info; + int ret; + + hFile = win32_open_existing_file(path, FILE_READ_ATTRIBUTES); + if (hFile == INVALID_HANDLE_VALUE) { + err = GetLastError(); + WARNING("Failed to open \"%ls\" to get file and volume IDs", + path); + win32_error(err); + return WIMLIB_ERR_OPEN; + } + + if (!GetFileInformationByHandle(hFile, &file_info)) { + err = GetLastError(); + ERROR("Failed to get file information for \"%ls\"", path); + win32_error(err); + ret = WIMLIB_ERR_STAT; + } else { + *ino_ret = ((u64)file_info.nFileIndexHigh << 32) | + (u64)file_info.nFileIndexLow; + *dev_ret = file_info.dwVolumeSerialNumber; + ret = 0; + } + CloseHandle(hFile); + return ret; +} + +/* Reparse point fixup status code */ +enum rp_status { + /* Reparse point corresponded to an absolute symbolic link or junction + * point that pointed outside the directory tree being captured, and + * therefore was excluded. */ + RP_EXCLUDED = 0x0, + + /* Reparse point was not fixed as it was either a relative symbolic + * link, a mount point, or something else we could not understand. */ + RP_NOT_FIXED = 0x1, + + /* Reparse point corresponded to an absolute symbolic link or junction + * point that pointed inside the directory tree being captured, where + * the target was specified by a "full" \??\ prefixed path, and + * therefore was fixed to be relative to the root of the directory tree + * being captured. */ + RP_FIXED_FULLPATH = 0x2, + + /* Same as RP_FIXED_FULLPATH, except the absolute link target did not + * have the \??\ prefix. It may have begun with a drive letter though. + * */ + RP_FIXED_ABSPATH = 0x4, + + /* Either RP_FIXED_FULLPATH or RP_FIXED_ABSPATH. */ + RP_FIXED = RP_FIXED_FULLPATH | RP_FIXED_ABSPATH, +}; + +/* Given the "substitute name" target of a Windows reparse point, try doing a + * fixup where we change it to be absolute relative to the root of the directory + * tree being captured. * - * @path: External path to the reparse point. Used for error messages only. + * Note that this is only executed when WIMLIB_ADD_IMAGE_FLAG_RPFIX has been + * set. * - * Returns 0 on success; nonzero on failure. */ + * @capture_root_ino and @capture_root_dev indicate the inode number and device + * of the root of the directory tree being captured. They are meant to identify + * this directory (as an alternative to its actual path, which could potentially + * be reached via multiple destinations due to other symbolic links). This may + * not work properly on FAT, which doesn't seem to supply proper inode numbers + * or file IDs. However, FAT doesn't support reparse points so this function + * wouldn't even be called anyway. */ +static enum rp_status +win32_maybe_rpfix_target(wchar_t *target, size_t *target_nchars_p, + u64 capture_root_ino, u64 capture_root_dev) +{ + size_t target_nchars= *target_nchars_p; + size_t stripped_chars; + wchar_t *orig_target; + + if (target_nchars == 0) + /* Invalid reparse point (empty target) */ + return RP_NOT_FIXED; + + if (target[0] == L'\\') { + if (target_nchars >= 2 && target[1] == L'\\') { + /* Probably a volume. Can't do anything with it. */ + DEBUG("Not fixing target (probably a volume)"); + return RP_NOT_FIXED; + } else if (target_nchars >= 7 && + target[1] == '?' && + target[2] == '?' && + target[3] == '\\' && + target[4] != '\0' && + target[5] == ':' && + target[6] == '\\') + { + DEBUG("Full style path"); + /* Full \??\x:\ style path (may be junction or symlink) + * */ + stripped_chars = 6; + } else { + DEBUG("Absolute target without drive letter"); + /* Absolute target, without drive letter */ + stripped_chars = 0; + } + } else if (target_nchars >= 3 && + target[0] != L'\0' && + target[1] == L':' && + target[2] == L'\\') + { + DEBUG("Absolute target with drive letter"); + /* Absolute target, with drive letter */ + stripped_chars = 2; + } else { + DEBUG("Relative symlink or other link"); + /* Relative symlink or other unexpected format */ + return RP_NOT_FIXED; + } + target[target_nchars] = L'\0'; + orig_target = target; + target = fixup_symlink(target + stripped_chars, capture_root_ino, capture_root_dev); + if (!target) + return RP_EXCLUDED; + target_nchars = wcslen(target); + wmemmove(orig_target + stripped_chars, target, target_nchars + 1); + *target_nchars_p = target_nchars + stripped_chars; + DEBUG("Fixed reparse point (new target: \"%ls\")", orig_target); + if (stripped_chars == 6) + return RP_FIXED_FULLPATH; + else + return RP_FIXED_ABSPATH; +} + +static enum rp_status +win32_try_capture_rpfix(char *rpbuf, DWORD *rpbuflen_p, + u64 capture_root_ino, u64 capture_root_dev) +{ + const char *p_get; + char *p_put; + u16 substitute_name_offset; + u16 substitute_name_len; + wchar_t *target; + size_t target_nchars; + enum rp_status status; + u32 rptag; + DWORD rpbuflen = *rpbuflen_p; + + if (rpbuflen < 16) /* Invalid reparse point (length too small) */ + return RP_NOT_FIXED; + p_get = get_u32(rpbuf, &rptag); + p_get += 4; + p_get = get_u16(p_get, &substitute_name_offset); + p_get = get_u16(p_get, &substitute_name_len); + p_get += 4; + if (rptag == WIM_IO_REPARSE_TAG_SYMLINK) { + if (rpbuflen < 20) /* Invalid reparse point (length too small) */ + return RP_NOT_FIXED; + p_get += 4; + } + if ((DWORD)substitute_name_offset + + substitute_name_len + (p_get - rpbuf) > rpbuflen) + /* Invalid reparse point (length too small) */ + return RP_NOT_FIXED; + + target = (wchar_t*)&p_get[substitute_name_offset]; + target_nchars = substitute_name_len / 2; + /* Note: target is not necessarily null-terminated */ + + status = win32_maybe_rpfix_target(target, &target_nchars, + capture_root_ino, capture_root_dev); + if (status & RP_FIXED) { + size_t target_nbytes = target_nchars * 2; + size_t print_nbytes = target_nbytes; + wchar_t target_copy[target_nchars]; + wchar_t *print_name = target_copy; + + if (status == RP_FIXED_FULLPATH) { + /* "full path", meaning \??\ prefixed. We should not + * include this prefix in the print name, as it is + * apparently meant for the filesystem driver only. */ + print_nbytes -= 8; + print_name += 4; + } + wmemcpy(target_copy, target, target_nchars); + p_put = rpbuf + 8; + p_put = put_u16(p_put, 0); /* Substitute name offset */ + p_put = put_u16(p_put, target_nbytes); /* Substitute name length */ + p_put = put_u16(p_put, target_nbytes + 2); /* Print name offset */ + p_put = put_u16(p_put, print_nbytes); /* Print name length */ + if (rptag == WIM_IO_REPARSE_TAG_SYMLINK) + p_put = put_u32(p_put, 1); + p_put = put_bytes(p_put, target_nbytes, target_copy); + p_put = put_u16(p_put, 0); + p_put = put_bytes(p_put, print_nbytes, print_name); + p_put = put_u16(p_put, 0); + + /* Wrote the end of the reparse data. Recalculate the length, + * set the length field correctly, and return it. */ + rpbuflen = p_put - rpbuf; + put_u16(rpbuf + 4, rpbuflen - 8); + *rpbuflen_p = rpbuflen; + } + return status; +} + static int -win32_capture_reparse_point(HANDLE hFile, - struct wim_inode *inode, - struct wim_lookup_table *lookup_table, - const wchar_t *path) +win32_get_reparse_data(HANDLE hFile, const wchar_t *path, + struct add_image_params *params, + void *reparse_data, size_t *reparse_data_len_ret) { - /* "Reparse point data, including the tag and optional GUID, - * cannot exceed 16 kilobytes." - MSDN */ - char reparse_point_buf[16 * 1024]; DWORD bytesReturned; + u32 reparse_tag; + enum rp_status status; + DEBUG("Loading reparse data from \"%ls\"", path); if (!DeviceIoControl(hFile, FSCTL_GET_REPARSE_POINT, NULL, /* "Not used with this operation; set to NULL" */ 0, /* "Not used with this operation; set to 0" */ - reparse_point_buf, /* "A pointer to a buffer that + reparse_data, /* "A pointer to a buffer that receives the reparse point data */ - sizeof(reparse_point_buf), /* "The size of the output - buffer, in bytes */ + REPARSE_POINT_MAX_SIZE, /* "The size of the output + buffer, in bytes */ &bytesReturned, NULL)) { DWORD err = GetLastError(); ERROR("Failed to get reparse data of \"%ls\"", path); win32_error(err); - return WIMLIB_ERR_READ; + return -WIMLIB_ERR_READ; } if (bytesReturned < 8) { ERROR("Reparse data on \"%ls\" is invalid", path); - return WIMLIB_ERR_READ; + return -WIMLIB_ERR_READ; + } + + reparse_tag = le32_to_cpu(*(u32*)reparse_data); + if (params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_RPFIX && + (reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK || + reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT)) + { + /* Try doing reparse point fixup */ + status = win32_try_capture_rpfix(reparse_data, + &bytesReturned, + params->capture_root_ino, + params->capture_root_dev); + } else { + status = RP_NOT_FIXED; } - inode->i_reparse_tag = le32_to_cpu(*(u32*)reparse_point_buf); - return inode_add_ads_with_data(inode, L"", - reparse_point_buf + 8, - bytesReturned - 8, lookup_table); + *reparse_data_len_ret = bytesReturned; + return status; +} + +static DWORD WINAPI +win32_tally_encrypted_size_cb(unsigned char *_data, void *_ctx, + unsigned long len) +{ + *(u64*)_ctx += len; + return ERROR_SUCCESS; } -/* Calculate the SHA1 message digest of a Win32 data stream, which may be either - * an unnamed or named data stream. - * - * @path: Path to the file, with the stream noted at the end for named - * streams. UTF-16LE encoding. - * - * @hash: On success, the SHA1 message digest of the stream is written to - * this location. - * - * Returns 0 on success; nonzero on failure. - */ static int -win32_sha1sum(const wchar_t *path, u8 hash[SHA1_HASH_SIZE]) +win32_get_encrypted_file_size(const wchar_t *path, u64 *size_ret) { - HANDLE hFile; - SHA_CTX ctx; - u8 buf[32768]; - DWORD bytesRead; + DWORD err; + void *file_ctx; int ret; - hFile = win32_open_file_data_only(path); - if (hFile == INVALID_HANDLE_VALUE) + *size_ret = 0; + err = OpenEncryptedFileRawW(path, 0, &file_ctx); + if (err != ERROR_SUCCESS) { + ERROR("Failed to open encrypted file \"%ls\" for raw read", path); + win32_error(err); return WIMLIB_ERR_OPEN; - - sha1_init(&ctx); - for (;;) { - if (!ReadFile(hFile, buf, sizeof(buf), &bytesRead, NULL)) { - ret = WIMLIB_ERR_READ; - goto out_close_handle; - } - if (bytesRead == 0) - break; - sha1_update(&ctx, buf, bytesRead); } - ret = 0; - sha1_final(hash, &ctx); -out_close_handle: - CloseHandle(hFile); + err = ReadEncryptedFileRaw(win32_tally_encrypted_size_cb, + size_ret, file_ctx); + if (err != ERROR_SUCCESS) { + ERROR("Failed to read raw encrypted data from \"%ls\"", path); + win32_error(err); + ret = WIMLIB_ERR_READ; + } else { + ret = 0; + } + CloseEncryptedFileRaw(file_ctx); return ret; } @@ -512,7 +903,6 @@ win32_capture_stream(const wchar_t *path, WIN32_FIND_STREAM_DATA *dat) { struct wim_ads_entry *ads_entry; - u8 hash[SHA1_HASH_SIZE]; struct wim_lookup_table_entry *lte; int ret; wchar_t *stream_name, *colon; @@ -520,11 +910,12 @@ win32_capture_stream(const wchar_t *path, bool is_named_stream; wchar_t *spath; size_t spath_nchars; - DWORD err; size_t spath_buf_nbytes; const wchar_t *relpath_prefix; const wchar_t *colonchar; + DEBUG("Capture \"%ls\" stream \"%ls\"", path, dat->cStreamName); + /* The stream name should be returned as :NAME:TYPE */ stream_name = dat->cStreamName; if (*stream_name != L':') @@ -555,6 +946,12 @@ win32_capture_stream(const wchar_t *path, } } + /* If zero length stream, no lookup table entry needed. */ + if ((u64)dat->StreamSize.QuadPart == 0) { + ret = 0; + goto out; + } + /* Create a UTF-16LE string @spath that gives the filename, then a * colon, then the stream name. Or, if it's an unnamed stream, just the * filename. It is MALLOC()'ed so that it can be saved in the @@ -585,39 +982,36 @@ win32_capture_stream(const wchar_t *path, swprintf(spath, L"%ls%ls%ls%ls", relpath_prefix, path, colonchar, stream_name); - ret = win32_sha1sum(spath, hash); - if (ret) { - err = GetLastError(); - ERROR("Failed to read \"%ls\" to calculate SHA1sum", spath); - win32_error(err); + /* Make a new wim_lookup_table_entry */ + lte = new_lookup_table_entry(); + if (!lte) { + ret = WIMLIB_ERR_NOMEM; goto out_free_spath; } - - lte = __lookup_resource(lookup_table, hash); - if (lte) { - /* Use existing wim_lookup_table_entry that has the same SHA1 - * message digest */ - lte->refcnt++; - } else { - /* Make a new wim_lookup_table_entry */ - lte = new_lookup_table_entry(); - if (!lte) { - ret = WIMLIB_ERR_NOMEM; + lte->file_on_disk = spath; + spath = NULL; + if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED && !is_named_stream) { + u64 encrypted_size; + lte->resource_location = RESOURCE_WIN32_ENCRYPTED; + ret = win32_get_encrypted_file_size(path, &encrypted_size); + if (ret) goto out_free_spath; - } - lte->file_on_disk = spath; - lte->win32_file_on_disk_fp = INVALID_HANDLE_VALUE; - spath = NULL; + lte->resource_entry.original_size = encrypted_size; + } else { lte->resource_location = RESOURCE_WIN32; - lte->resource_entry.original_size = (uint64_t)dat->StreamSize.QuadPart; - lte->resource_entry.size = (uint64_t)dat->StreamSize.QuadPart; - copy_hash(lte->hash, hash); - lookup_table_insert(lookup_table, lte); + lte->resource_entry.original_size = (u64)dat->StreamSize.QuadPart; } - if (is_named_stream) + + u32 stream_id; + if (is_named_stream) { + stream_id = ads_entry->stream_id; ads_entry->lte = lte; - else + } else { + stream_id = 0; inode->i_lte = lte; + } + lookup_table_insert_unhashed(lookup_table, lte, inode, stream_id); + ret = 0; out_free_spath: FREE(spath); out: @@ -642,6 +1036,9 @@ out_invalid_stream_name: * @file_size: Size of unnamed data stream. (Used only if alternate * data streams API appears to be unavailable.) * + * @vol_flags: Flags that specify features of the volume being + * captured. + * * Returns 0 on success; nonzero on failure. */ static int @@ -649,20 +1046,23 @@ win32_capture_streams(const wchar_t *path, size_t path_num_chars, struct wim_inode *inode, struct wim_lookup_table *lookup_table, - u64 file_size) + u64 file_size, + unsigned vol_flags) { WIN32_FIND_STREAM_DATA dat; int ret; HANDLE hFind; DWORD err; - if (win32func_FindFirstStreamW == NULL) + DEBUG("Capturing streams from \"%ls\"", path); + + if (win32func_FindFirstStreamW == NULL || + !(vol_flags & FILE_NAMED_STREAMS)) goto unnamed_only; hFind = win32func_FindFirstStreamW(path, FindStreamInfoStandard, &dat, 0); if (hFind == INVALID_HANDLE_VALUE) { err = GetLastError(); - if (err == ERROR_CALL_NOT_IMPLEMENTED) goto unnamed_only; @@ -672,13 +1072,14 @@ win32_capture_streams(const wchar_t *path, (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY)) && err == ERROR_HANDLE_EOF) { + DEBUG("ERROR_HANDLE_EOF (ok)"); return 0; } else { if (err == ERROR_ACCESS_DENIED) { - WARNING("Failed to look up data streams " - "of \"%ls\": Access denied!\n%ls", - path, capture_access_denied_msg); - return 0; + ERROR("Failed to look up data streams " + "of \"%ls\": Access denied!\n%ls", + path, capture_access_denied_msg); + return WIMLIB_ERR_READ; } else { ERROR("Failed to look up data streams " "of \"%ls\"", path); @@ -705,11 +1106,17 @@ out_find_close: FindClose(hFind); return ret; unnamed_only: + /* FindFirstStreamW() API is not available, or the volume does not + * support named streams. Only capture the unnamed data stream. */ + DEBUG("Only capturing unnamed data stream"); if (inode->i_attributes & (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY)) { ret = 0; } else { + /* Just create our own WIN32_FIND_STREAM_DATA for an unnamed + * stream to reduce the code to a call to the + * already-implemented win32_capture_stream() */ wcscpy(dat.cStreamName, L"::$DATA"); dat.StreamSize.QuadPart = file_size; ret = win32_capture_stream(path, @@ -724,43 +1131,44 @@ static int win32_build_dentry_tree_recursive(struct wim_dentry **root_ret, wchar_t *path, size_t path_num_chars, - struct wim_lookup_table *lookup_table, - struct sd_set *sd_set, - const struct capture_config *config, - int add_image_flags, - wimlib_progress_func_t progress_func, - struct win32_capture_state *state) + struct add_image_params *params, + struct win32_capture_state *state, + unsigned vol_flags) { struct wim_dentry *root = NULL; struct wim_inode *inode; DWORD err; u64 file_size; - int ret = 0; + int ret; + void *reparse_data; + size_t reparse_data_len; + u16 not_rpfixed; - if (exclude_path(path, config, true)) { - if (add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) { + if (exclude_path(path, path_num_chars, params->config, true)) { + if (params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_ROOT) { ERROR("Cannot exclude the root directory from capture"); ret = WIMLIB_ERR_INVALID_CAPTURE_CONFIG; goto out; } - if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE) - && progress_func) + if ((params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_EXCLUDE_VERBOSE) + && params->progress_func) { union wimlib_progress_info info; info.scan.cur_path = path; info.scan.excluded = true; - progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info); + params->progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info); } + ret = 0; goto out; } - if ((add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE) - && progress_func) + if ((params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_VERBOSE) + && params->progress_func) { union wimlib_progress_info info; info.scan.cur_path = path; info.scan.excluded = false; - progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info); + params->progress_func(WIMLIB_PROGRESS_MSG_SCAN_DENTRY, &info); } HANDLE hFile = win32_open_existing_file(path, @@ -783,33 +1191,64 @@ win32_build_dentry_tree_recursive(struct wim_dentry **root_ret, goto out_close_handle; } - /* Create a WIM dentry */ - ret = new_dentry_with_timeless_inode(path_basename_with_len(path, path_num_chars), - &root); + if (file_info.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) { + reparse_data = alloca(REPARSE_POINT_MAX_SIZE); + ret = win32_get_reparse_data(hFile, path, params, + reparse_data, &reparse_data_len); + if (ret < 0) { + /* WIMLIB_ERR_* (inverted) */ + ret = -ret; + goto out_close_handle; + } else if (ret & RP_FIXED) { + not_rpfixed = 0; + } else if (ret == RP_EXCLUDED) { + ret = 0; + goto out_close_handle; + } else { + not_rpfixed = 1; + } + } + + /* Create a WIM dentry with an associated inode, which may be shared. + * + * However, we need to explicitly check for directories and files with + * only 1 link and refuse to hard link them. This is because Windows + * has a bug where it can return duplicate File IDs for files and + * directories on the FAT filesystem. */ + ret = inode_table_new_dentry(params->inode_table, + path_basename_with_len(path, path_num_chars), + ((u64)file_info.nFileIndexHigh << 32) | + (u64)file_info.nFileIndexLow, + file_info.dwVolumeSerialNumber, + (file_info.nNumberOfLinks <= 1 || + (file_info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)), + &root); + if (ret) + goto out_close_handle; + + ret = win32_get_short_name(root, path); if (ret) goto out_close_handle; - /* Start preparing the associated WIM inode */ inode = root->d_inode; + if (inode->i_nlink > 1) /* Shared inode; nothing more to do */ + goto out_close_handle; + inode->i_attributes = file_info.dwFileAttributes; inode->i_creation_time = FILETIME_to_u64(&file_info.ftCreationTime); inode->i_last_write_time = FILETIME_to_u64(&file_info.ftLastWriteTime); inode->i_last_access_time = FILETIME_to_u64(&file_info.ftLastAccessTime); - inode->i_ino = ((u64)file_info.nFileIndexHigh << 32) | - (u64)file_info.nFileIndexLow; - inode->i_resolved = 1; - add_image_flags &= ~(WIMLIB_ADD_IMAGE_FLAG_ROOT | WIMLIB_ADD_IMAGE_FLAG_SOURCE); - /* Get DOS name and security descriptor (if any). */ - ret = win32_get_short_name(root, path); - if (ret) - goto out_close_handle; + params->add_image_flags &= ~(WIMLIB_ADD_IMAGE_FLAG_ROOT | WIMLIB_ADD_IMAGE_FLAG_SOURCE); - if (!(add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NO_ACLS)) { - ret = win32_get_security_descriptor(root, sd_set, path, state, - add_image_flags); + if (!(params->add_image_flags & WIMLIB_ADD_IMAGE_FLAG_NO_ACLS) + && (vol_flags & FILE_PERSISTENT_ACLS)) + { + ret = win32_get_security_descriptor(root, params->sd_set, + path, state, + params->add_image_flags); if (ret) goto out_close_handle; } @@ -817,49 +1256,44 @@ win32_build_dentry_tree_recursive(struct wim_dentry **root_ret, file_size = ((u64)file_info.nFileSizeHigh << 32) | (u64)file_info.nFileSizeLow; - if (inode_is_directory(inode)) { - /* Directory (not a reparse point) --- recurse to children */ + CloseHandle(hFile); - /* But first... directories may have alternate data streams that - * need to be captured. */ - ret = win32_capture_streams(path, - path_num_chars, - inode, - lookup_table, - file_size); - if (ret) - goto out_close_handle; + /* Capture the unnamed data stream (only should be present for regular + * files) and any alternate data streams. */ + ret = win32_capture_streams(path, + path_num_chars, + inode, + params->lookup_table, + file_size, + vol_flags); + if (ret) + goto out; + + if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) { + /* Reparse point: set the reparse data (which we read already) + * */ + inode->i_not_rpfixed = not_rpfixed; + inode->i_reparse_tag = le32_to_cpu(*(u32*)reparse_data); + ret = inode_set_unnamed_stream(inode, reparse_data + 8, + reparse_data_len - 8, + params->lookup_table); + } else if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) { + /* Directory (not a reparse point) --- recurse to children */ ret = win32_recurse_directory(root, path, path_num_chars, - lookup_table, - sd_set, - config, - add_image_flags, - progress_func, - state); - } else if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) { - /* Reparse point: save the reparse tag and data */ - ret = win32_capture_reparse_point(hFile, - inode, - lookup_table, - path); - } else { - /* Not a directory, not a reparse point; capture the default - * file contents and any alternate data streams. */ - ret = win32_capture_streams(path, - path_num_chars, - inode, - lookup_table, - file_size); + params, + state, + vol_flags); } + goto out; out_close_handle: CloseHandle(hFile); out: if (ret == 0) *root_ret = root; else - free_dentry_tree(root, lookup_table); + free_dentry_tree(root, params->lookup_table); return ret; } @@ -899,22 +1333,27 @@ win32_do_capture_warnings(const struct win32_capture_state *state, int win32_build_dentry_tree(struct wim_dentry **root_ret, const wchar_t *root_disk_path, - struct wim_lookup_table *lookup_table, - struct sd_set *sd_set, - const struct capture_config *config, - int add_image_flags, - wimlib_progress_func_t progress_func, - void *extra_arg) + struct add_image_params *params) { size_t path_nchars; wchar_t *path; int ret; struct win32_capture_state state; + unsigned vol_flags; + path_nchars = wcslen(root_disk_path); if (path_nchars > 32767) return WIMLIB_ERR_INVALID_PARAM; + ret = win32_get_file_and_vol_ids(root_disk_path, + ¶ms->capture_root_ino, + ¶ms->capture_root_dev); + if (ret) + return ret; + + win32_get_vol_flags(root_disk_path, &vol_flags); + /* There is no check for overflow later when this buffer is being used! * But the max path length on NTFS is 32767 characters, and paths need * to be written specially to even go past 260 characters, so we should @@ -926,21 +1365,17 @@ win32_build_dentry_tree(struct wim_dentry **root_ret, wmemcpy(path, root_disk_path, path_nchars + 1); memset(&state, 0, sizeof(state)); - ret = win32_build_dentry_tree_recursive(root_ret, - path, - path_nchars, - lookup_table, - sd_set, - config, - add_image_flags, - progress_func, - &state); + ret = win32_build_dentry_tree_recursive(root_ret, path, + path_nchars, params, + &state, vol_flags); FREE(path); if (ret == 0) - win32_do_capture_warnings(&state, add_image_flags); + win32_do_capture_warnings(&state, params->add_image_flags); return ret; } +/* Wrapper around the FSCTL_SET_REPARSE_POINT ioctl to set the reparse data on + * an extracted reparse point. */ static int win32_set_reparse_data(HANDLE h, u32 reparse_tag, @@ -966,7 +1401,7 @@ win32_set_reparse_data(HANDLE h, * leave 8 bytes of space for them at the beginning of the buffer, then * set them manually. */ buf = alloca(len + 8); - ret = read_full_wim_resource(lte, buf + 8, 0); + ret = read_full_resource_into_buf(lte, buf + 8, false); if (ret) return ret; *(u32*)(buf + 0) = cpu_to_le32(reparse_tag); @@ -1003,7 +1438,60 @@ win32_set_reparse_data(HANDLE h, DWORD err = GetLastError(); ERROR("Failed to set reparse data on \"%ls\"", path); win32_error(err); - return WIMLIB_ERR_WRITE; + if (err == ERROR_ACCESS_DENIED || err == ERROR_PRIVILEGE_NOT_HELD) + return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES_TO_EXTRACT; + else if (reparse_tag == WIM_IO_REPARSE_TAG_SYMLINK || + reparse_tag == WIM_IO_REPARSE_TAG_MOUNT_POINT) + return WIMLIB_ERR_LINK; + else + return WIMLIB_ERR_WRITE; + } + return 0; +} + +/* Wrapper around the FSCTL_SET_COMPRESSION ioctl to change the + * FILE_ATTRIBUTE_COMPRESSED flag of a file or directory. */ +static int +win32_set_compression_state(HANDLE hFile, USHORT format, const wchar_t *path) +{ + DWORD bytesReturned; + if (!DeviceIoControl(hFile, FSCTL_SET_COMPRESSION, + &format, sizeof(USHORT), + NULL, 0, + &bytesReturned, NULL)) + { + /* Could be a warning only, but we only call this if the volume + * supports compression. So I'm calling this an error. */ + DWORD err = GetLastError(); + ERROR("Failed to set compression flag on \"%ls\"", path); + win32_error(err); + if (err == ERROR_ACCESS_DENIED || err == ERROR_PRIVILEGE_NOT_HELD) + return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES_TO_EXTRACT; + else + return WIMLIB_ERR_WRITE; + } + return 0; +} + +/* Wrapper around FSCTL_SET_SPARSE ioctl to set a file as sparse. */ +static int +win32_set_sparse(HANDLE hFile, const wchar_t *path) +{ + DWORD bytesReturned; + if (!DeviceIoControl(hFile, FSCTL_SET_SPARSE, + NULL, 0, + NULL, 0, + &bytesReturned, NULL)) + { + /* Could be a warning only, but we only call this if the volume + * supports sparse files. So I'm calling this an error. */ + DWORD err = GetLastError(); + WARNING("Failed to set sparse flag on \"%ls\"", path); + win32_error(err); + if (err == ERROR_ACCESS_DENIED || err == ERROR_PRIVILEGE_NOT_HELD) + return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES_TO_EXTRACT; + else + return WIMLIB_ERR_WRITE; } return 0; } @@ -1013,33 +1501,65 @@ win32_set_reparse_data(HANDLE h, */ static int win32_set_security_data(const struct wim_inode *inode, + HANDLE hFile, const wchar_t *path, struct apply_args *args) { PSECURITY_DESCRIPTOR descriptor; unsigned long n; DWORD err; + const struct wim_security_data *sd; + + SECURITY_INFORMATION securityInformation = 0; + + void *owner = NULL; + void *group = NULL; + ACL *dacl = NULL; + ACL *sacl = NULL; + + BOOL owner_defaulted; + BOOL group_defaulted; + BOOL dacl_present; + BOOL dacl_defaulted; + BOOL sacl_present; + BOOL sacl_defaulted; + + sd = wim_const_security_data(args->w); + descriptor = sd->descriptors[inode->i_security_id]; - descriptor = wim_const_security_data(args->w)->descriptors[inode->i_security_id]; + GetSecurityDescriptorOwner(descriptor, &owner, &owner_defaulted); + if (owner) + securityInformation |= OWNER_SECURITY_INFORMATION; + + GetSecurityDescriptorGroup(descriptor, &group, &group_defaulted); + if (group) + securityInformation |= GROUP_SECURITY_INFORMATION; + + GetSecurityDescriptorDacl(descriptor, &dacl_present, + &dacl, &dacl_defaulted); + if (dacl) + securityInformation |= DACL_SECURITY_INFORMATION; + + GetSecurityDescriptorSacl(descriptor, &sacl_present, + &sacl, &sacl_defaulted); + if (sacl) + securityInformation |= SACL_SECURITY_INFORMATION; - SECURITY_INFORMATION securityInformation = DACL_SECURITY_INFORMATION | - SACL_SECURITY_INFORMATION | - OWNER_SECURITY_INFORMATION | - GROUP_SECURITY_INFORMATION; again: - if (SetFileSecurityW(path, securityInformation, descriptor)) + if (securityInformation == 0) + return 0; + if (SetSecurityInfo(hFile, SE_FILE_OBJECT, + securityInformation, owner, group, dacl, sacl)) return 0; - err = GetLastError(); - if (args->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS) goto fail; - switch (err) { case ERROR_PRIVILEGE_NOT_HELD: if (securityInformation & SACL_SECURITY_INFORMATION) { n = args->num_set_sacl_priv_notheld++; securityInformation &= ~SACL_SECURITY_INFORMATION; + sacl = NULL; if (n < MAX_SET_SACL_PRIV_NOTHELD_WARNINGS) { WARNING( "We don't have enough privileges to set the full security\n" @@ -1079,14 +1599,16 @@ again: fail: ERROR("Failed to set security descriptor on \"%ls\"", path); win32_error(err); - return WIMLIB_ERR_WRITE; + if (err == ERROR_ACCESS_DENIED || err == ERROR_PRIVILEGE_NOT_HELD) + return WIMLIB_ERR_INSUFFICIENT_PRIVILEGES_TO_EXTRACT; + else + return WIMLIB_ERR_WRITE; } - return 0; } static int -win32_extract_chunk(const void *buf, size_t len, u64 offset, void *arg) +win32_extract_chunk(const void *buf, size_t len, void *arg) { HANDLE hStream = arg; @@ -1105,12 +1627,191 @@ win32_extract_chunk(const void *buf, size_t len, u64 offset, void *arg) } static int -do_win32_extract_stream(HANDLE hStream, struct wim_lookup_table_entry *lte) +do_win32_extract_stream(HANDLE hStream, const struct wim_lookup_table_entry *lte) { return extract_wim_resource(lte, wim_resource_size(lte), win32_extract_chunk, hStream); } +struct win32_encrypted_extract_ctx { + void *file_ctx; + int wimlib_err_code; + bool done; + pthread_cond_t cond; + pthread_mutex_t mutex; + u8 buf[WIM_CHUNK_SIZE]; + size_t buf_filled; +}; + +static DWORD WINAPI +win32_encrypted_import_cb(unsigned char *data, void *_ctx, + unsigned long *len_p) +{ + struct win32_encrypted_extract_ctx *ctx = _ctx; + unsigned long len = *len_p; + + pthread_mutex_lock(&ctx->mutex); + while (len) { + size_t bytes_to_copy; + + DEBUG("Importing up to %lu more bytes of raw encrypted data", len); + while (ctx->buf_filled == 0) { + if (ctx->done) + goto out; + pthread_cond_wait(&ctx->cond, &ctx->mutex); + } + bytes_to_copy = min(len, ctx->buf_filled); + memcpy(data, ctx->buf, bytes_to_copy); + len -= bytes_to_copy; + data += bytes_to_copy; + ctx->buf_filled -= bytes_to_copy; + memmove(ctx->buf, ctx->buf + bytes_to_copy, ctx->buf_filled); + pthread_cond_signal(&ctx->cond); + } +out: + *len_p -= len; + pthread_mutex_unlock(&ctx->mutex); + return ERROR_SUCCESS; +} + +/* Extract ("Import") an encrypted file in a different thread. */ +static void * +win32_encrypted_import_proc(void *arg) +{ + struct win32_encrypted_extract_ctx *ctx = arg; + DWORD ret; + ret = WriteEncryptedFileRaw(win32_encrypted_import_cb, ctx, + ctx->file_ctx); + pthread_mutex_lock(&ctx->mutex); + if (ret == ERROR_SUCCESS) { + ctx->wimlib_err_code = 0; + } else { + win32_error(ret); + ctx->wimlib_err_code = WIMLIB_ERR_WRITE; + } + ctx->done = true; + pthread_cond_signal(&ctx->cond); + pthread_mutex_unlock(&ctx->mutex); + return NULL; +} + + +static int +win32_extract_raw_encrypted_chunk(const void *buf, size_t len, void *arg) +{ + struct win32_encrypted_extract_ctx *ctx = arg; + size_t bytes_to_copy; + + while (len) { + DEBUG("Extracting up to %zu more bytes of encrypted data", len); + pthread_mutex_lock(&ctx->mutex); + while (ctx->buf_filled == WIM_CHUNK_SIZE) { + if (ctx->done) { + pthread_mutex_unlock(&ctx->mutex); + return ctx->wimlib_err_code; + } + pthread_cond_wait(&ctx->cond, &ctx->mutex); + } + bytes_to_copy = min(len, WIM_CHUNK_SIZE - ctx->buf_filled); + memcpy(&ctx->buf[ctx->buf_filled], buf, bytes_to_copy); + len -= bytes_to_copy; + buf += bytes_to_copy; + ctx->buf_filled += bytes_to_copy; + pthread_cond_signal(&ctx->cond); + pthread_mutex_unlock(&ctx->mutex); + } + return 0; +} + +/* Create an encrypted file and extract the raw encrypted data to it. + * + * @path: Path to encrypted file to create. + * @lte: WIM lookup_table entry for the raw encrypted data. + * + * This is separate from do_win32_extract_stream() because the WIM is supposed + * to contain the *raw* encrypted data, which needs to be extracted ("imported") + * using the special APIs OpenEncryptedFileRawW(), WriteEncryptedFileRaw(), and + * CloseEncryptedFileRaw(). + * + * Returns 0 on success; nonzero on failure. + */ +static int +do_win32_extract_encrypted_stream(const wchar_t *path, + const struct wim_lookup_table_entry *lte) +{ + struct win32_encrypted_extract_ctx ctx; + void *file_ctx; + pthread_t import_thread; + int ret; + int ret2; + + DEBUG("Opening file \"%ls\" to extract raw encrypted data", path); + + ret = OpenEncryptedFileRawW(path, CREATE_FOR_IMPORT, &file_ctx); + if (ret) { + ERROR("Failed to open \"%ls\" to write raw encrypted data", path); + win32_error(ret); + return WIMLIB_ERR_OPEN; + } + + if (!lte) + goto out_close; + + /* Hack alert: WriteEncryptedFileRaw() requires the callback function + * to work with a buffer whose size we cannot control. This doesn't + * play well with our read_resource_prefix() function, which itself uses + * a callback function to extract WIM_CHUNK_SIZE chunks of data. We + * work around this problem by calling WriteEncryptedFileRaw() in a + * different thread and feeding it the data as needed. */ + ctx.file_ctx = file_ctx; + ctx.buf_filled = 0; + ctx.done = false; + ctx.wimlib_err_code = 0; + if (pthread_mutex_init(&ctx.mutex, NULL)) { + ERROR_WITH_ERRNO("Can't create mutex"); + ret = WIMLIB_ERR_NOMEM; + goto out_close; + } + if (pthread_cond_init(&ctx.cond, NULL)) { + ERROR_WITH_ERRNO("Can't create condition variable"); + ret = WIMLIB_ERR_NOMEM; + goto out_pthread_mutex_destroy; + } + ret = pthread_create(&import_thread, NULL, + win32_encrypted_import_proc, &ctx); + if (ret) { + errno = ret; + ERROR_WITH_ERRNO("Failed to create thread"); + ret = WIMLIB_ERR_FORK; + goto out_pthread_cond_destroy; + } + + ret = extract_wim_resource(lte, wim_resource_size(lte), + win32_extract_raw_encrypted_chunk, &ctx); + pthread_mutex_lock(&ctx.mutex); + ctx.done = true; + pthread_cond_signal(&ctx.cond); + pthread_mutex_unlock(&ctx.mutex); + ret2 = pthread_join(import_thread, NULL); + if (ret2) { + errno = ret2; + ERROR_WITH_ERRNO("Failed to join encrypted import thread"); + if (ret == 0) + ret = WIMLIB_ERR_WRITE; + } + if (ret == 0) + ret = ctx.wimlib_err_code; +out_pthread_cond_destroy: + pthread_cond_destroy(&ctx.cond); +out_pthread_mutex_destroy: + pthread_mutex_destroy(&ctx.mutex); +out_close: + CloseEncryptedFileRaw(file_ctx); + if (ret) + ERROR("Failed to extract encrypted file \"%ls\"", path); + return ret; +} + static bool path_is_root_of_drive(const wchar_t *path) { @@ -1128,21 +1829,307 @@ path_is_root_of_drive(const wchar_t *path) return (*path == L'\0'); } +static inline DWORD +win32_mask_attributes(DWORD i_attributes) +{ + return i_attributes & ~(FILE_ATTRIBUTE_SPARSE_FILE | + FILE_ATTRIBUTE_COMPRESSED | + FILE_ATTRIBUTE_REPARSE_POINT | + FILE_ATTRIBUTE_DIRECTORY | + FILE_ATTRIBUTE_ENCRYPTED | + FILE_FLAG_DELETE_ON_CLOSE | + FILE_FLAG_NO_BUFFERING | + FILE_FLAG_OPEN_NO_RECALL | + FILE_FLAG_OVERLAPPED | + FILE_FLAG_RANDOM_ACCESS | + /*FILE_FLAG_SESSION_AWARE |*/ + FILE_FLAG_SEQUENTIAL_SCAN | + FILE_FLAG_WRITE_THROUGH); +} + +static inline DWORD +win32_get_create_flags_and_attributes(DWORD i_attributes) +{ + /* + * Some attributes cannot be set by passing them to CreateFile(). In + * particular: + * + * FILE_ATTRIBUTE_DIRECTORY: + * CreateDirectory() must be called instead of CreateFile(). + * + * FILE_ATTRIBUTE_SPARSE_FILE: + * Needs an ioctl. + * See: win32_set_sparse(). + * + * FILE_ATTRIBUTE_COMPRESSED: + * Not clear from the documentation, but apparently this needs an + * ioctl as well. + * See: win32_set_compressed(). + * + * FILE_ATTRIBUTE_REPARSE_POINT: + * Needs an ioctl, with the reparse data specified. + * See: win32_set_reparse_data(). + * + * In addition, clear any file flags in the attributes that we don't + * want, but also specify FILE_FLAG_OPEN_REPARSE_POINT and + * FILE_FLAG_BACKUP_SEMANTICS as we are a backup application. + */ + return win32_mask_attributes(i_attributes) | + FILE_FLAG_OPEN_REPARSE_POINT | + FILE_FLAG_BACKUP_SEMANTICS; +} + +/* Set compression and/or sparse attributes on a stream, if supported by the + * volume. */ +static int +win32_set_special_stream_attributes(HANDLE hFile, const struct wim_inode *inode, + struct wim_lookup_table_entry *unnamed_stream_lte, + const wchar_t *path, unsigned vol_flags) +{ + int ret; + + if (inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED) { + if (vol_flags & FILE_FILE_COMPRESSION) { + ret = win32_set_compression_state(hFile, + COMPRESSION_FORMAT_DEFAULT, + path); + if (ret) + return ret; + } else { + DEBUG("Cannot set compression attribute on \"%ls\": " + "volume does not support transparent compression", + path); + } + } + + if (inode->i_attributes & FILE_ATTRIBUTE_SPARSE_FILE) { + if (vol_flags & FILE_SUPPORTS_SPARSE_FILES) { + DEBUG("Setting sparse flag on \"%ls\"", path); + ret = win32_set_sparse(hFile, path); + if (ret) + return ret; + } else { + DEBUG("Cannot set sparse attribute on \"%ls\": " + "volume does not support sparse files", + path); + } + } + return 0; +} + +/* Pre-create directories; extract encrypted streams */ +static int +win32_begin_extract_unnamed_stream(const struct wim_inode *inode, + const struct wim_lookup_table_entry *lte, + const wchar_t *path, + DWORD *creationDisposition_ret, + unsigned int vol_flags) +{ + DWORD err; + int ret; + + /* Directories must be created with CreateDirectoryW(). Then the call + * to CreateFileW() will merely open the directory that was already + * created rather than creating a new file. */ + if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) { + if (!CreateDirectoryW(path, NULL)) { + err = GetLastError(); + switch (err) { + case ERROR_ALREADY_EXISTS: + break; + case ERROR_ACCESS_DENIED: + if (path_is_root_of_drive(path)) + break; + /* Fall through */ + default: + ERROR("Failed to create directory \"%ls\"", + path); + win32_error(err); + return WIMLIB_ERR_MKDIR; + } + } + DEBUG("Created directory \"%ls\"", path); + *creationDisposition_ret = OPEN_EXISTING; + } + if (inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED && + vol_flags & FILE_SUPPORTS_ENCRYPTION) + { + if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) { + if (!EncryptFile(path)) { + err = GetLastError(); + ERROR("Failed to encrypt directory \"%ls\"", + path); + win32_error(err); + return WIMLIB_ERR_WRITE; + } + } else { + ret = do_win32_extract_encrypted_stream(path, lte); + if (ret) + return ret; + DEBUG("Extracted encrypted file \"%ls\"", path); + } + *creationDisposition_ret = OPEN_EXISTING; + } + + /* Set file attributes if we created the file. Otherwise, we haven't + * created the file set and we will set the attributes in the call to + * CreateFileW(). + * + * The FAT filesystem does not let you change the attributes of the root + * directory, so treat that as a special case and do not set attributes. + * */ + if (*creationDisposition_ret == OPEN_EXISTING && + !path_is_root_of_drive(path)) + { + if (!SetFileAttributesW(path, + win32_mask_attributes(inode->i_attributes))) + { + err = GetLastError(); + ERROR("Failed to set attributes on \"%ls\"", path); + win32_error(err); + return WIMLIB_ERR_WRITE; + } + } + return 0; +} + +/* Set security descriptor and extract stream data or reparse data (skip the + * unnamed data stream of encrypted files, which was already extracted). */ +static int +win32_finish_extract_stream(HANDLE h, const struct wim_inode *inode, + const struct wim_lookup_table_entry *lte, + const wchar_t *stream_path, + const wchar_t *stream_name_utf16, + struct apply_args *args) +{ + int ret = 0; + if (stream_name_utf16 == NULL) { + /* Unnamed stream. */ + + /* Set security descriptor, unless the extract_flags indicate + * not to or the volume does not supported it. Note that this + * is only done when the unnamed stream is being extracted, as + * security descriptors are per-file and not per-stream. */ + if (inode->i_security_id >= 0 && + !(args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS) + && (args->vol_flags & FILE_PERSISTENT_ACLS)) + { + ret = win32_set_security_data(inode, h, stream_path, args); + if (ret) + return ret; + } + + /* Handle reparse points. The data for them needs to be set + * using a special ioctl. Note that the reparse point may have + * been created using CreateFileW() in the case of + * non-directories or CreateDirectoryW() in the case of + * directories; but the ioctl works either way. Also, it is + * only this step that actually sets the + * FILE_ATTRIBUTE_REPARSE_POINT, as it is not valid to set it + * using SetFileAttributesW() or CreateFileW(). + * + * If the volume does not support reparse points we simply + * ignore the reparse data. (N.B. the code currently doesn't + * actually reach this case because reparse points are skipped + * entirely on such volumes.) */ + if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT) { + if (args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS) { + DEBUG("Setting reparse data on \"%ls\"", + stream_path); + ret = win32_set_reparse_data(h, + inode->i_reparse_tag, + lte, stream_path); + if (ret) + return ret; + } else { + DEBUG("Cannot set reparse data on \"%ls\": volume " + "does not support reparse points", stream_path); + } + } else if (lte != NULL && + !(args->vol_flags & FILE_SUPPORTS_ENCRYPTION && + inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED)) + { + /* Extract the data of the unnamed stream, unless the + * lookup table entry is NULL (indicating an empty + * stream for which no data needs to be extracted), or + * the stream is encrypted and therefore was already + * extracted as a special case. */ + ret = do_win32_extract_stream(h, lte); + } + } else { + /* Extract the data for a named data stream. */ + if (lte != NULL) { + DEBUG("Extracting named data stream \"%ls\" (len = %"PRIu64")", + stream_path, wim_resource_size(lte)); + ret = do_win32_extract_stream(h, lte); + } + } + return ret; +} + +static int +win32_decrypt_file(HANDLE open_handle, const wchar_t *path) +{ + DWORD err; + /* We cannot call DecryptFileW() while there is an open handle to the + * file. So close it first. */ + if (!CloseHandle(open_handle)) { + err = GetLastError(); + ERROR("Failed to close handle for \"%ls\"", path); + win32_error(err); + return WIMLIB_ERR_WRITE; + } + if (!DecryptFileW(path, 0 /* reserved parameter; set to 0 */)) { + err = GetLastError(); + ERROR("Failed to decrypt file \"%ls\"", path); + win32_error(err); + return WIMLIB_ERR_WRITE; + } + return 0; +} + +/* + * Create and extract a stream to a file, or create a directory, using the + * Windows API. + * + * This handles reparse points, directories, alternate data streams, encrypted + * files, compressed files, etc. + * + * @inode: WIM inode containing the stream. + * + * @path: Path to extract the file to. + * + * @stream_name_utf16: + * Name of the stream, or NULL if the stream is unnamed. This will + * be called with a NULL stream_name_utf16 before any non-NULL + * stream_name_utf16's. + * + * @lte: WIM lookup table entry for the stream. May be NULL to indicate + * a stream of length 0. + * + * @args: Additional apply context, including flags indicating supported + * volume features. + * + * Returns 0 on success; nonzero on failure. + */ static int win32_extract_stream(const struct wim_inode *inode, const wchar_t *path, const wchar_t *stream_name_utf16, - struct wim_lookup_table_entry *lte) + struct wim_lookup_table_entry *lte, + struct apply_args *args) { wchar_t *stream_path; HANDLE h; int ret; DWORD err; DWORD creationDisposition = CREATE_ALWAYS; + DWORD requestedAccess; + BY_HANDLE_FILE_INFORMATION file_info; if (stream_name_utf16) { /* Named stream. Create a buffer that contains the UTF-16LE - * string [.\]@path:@stream_name_utf16. This is needed to + * string [./]path:stream_name_utf16. This is needed to * create and open the stream using CreateFileW(). I'm not * aware of any other APIs to do this. Note: the '$DATA' suffix * seems to be unneeded. Additional note: a "./" prefix needs @@ -1174,71 +2161,104 @@ win32_extract_stream(const struct wim_inode *inode, * */ stream_path = (wchar_t*)path; - /* Directories must be created with CreateDirectoryW(). Then - * the call to CreateFileW() will merely open the directory that - * was already created rather than creating a new file. */ - if (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) { - if (!CreateDirectoryW(stream_path, NULL)) { - err = GetLastError(); - switch (err) { - case ERROR_ALREADY_EXISTS: - break; - case ERROR_ACCESS_DENIED: - if (path_is_root_of_drive(path)) - break; - /* Fall through */ - default: - ERROR("Failed to create directory \"%ls\"", - stream_path); - win32_error(err); - ret = WIMLIB_ERR_MKDIR; - goto fail; - } - } - DEBUG("Created directory \"%ls\"", stream_path); - if (!(inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT)) { - ret = 0; - goto out; - } - creationDisposition = OPEN_EXISTING; - } + ret = win32_begin_extract_unnamed_stream(inode, lte, path, + &creationDisposition, + args->vol_flags); + if (ret) + goto fail; } DEBUG("Opening \"%ls\"", stream_path); + requestedAccess = GENERIC_READ | GENERIC_WRITE | + ACCESS_SYSTEM_SECURITY; +try_open_again: + /* Open the stream to be extracted. Depending on what we have set + * creationDisposition to, we may be creating this for the first time, + * or we may be opening on existing stream we already created using + * CreateDirectoryW() or OpenEncryptedFileRawW(). */ h = CreateFileW(stream_path, - GENERIC_WRITE, + requestedAccess, 0, NULL, creationDisposition, - FILE_FLAG_OPEN_REPARSE_POINT | - FILE_FLAG_BACKUP_SEMANTICS | - inode->i_attributes, + win32_get_create_flags_and_attributes(inode->i_attributes), NULL); if (h == INVALID_HANDLE_VALUE) { err = GetLastError(); + if (err == ERROR_PRIVILEGE_NOT_HELD && + (requestedAccess & ACCESS_SYSTEM_SECURITY)) + { + /* Try opening the file again without privilege to + * modify SACL. */ + requestedAccess &= ~ACCESS_SYSTEM_SECURITY; + goto try_open_again; + } ERROR("Failed to create \"%ls\"", stream_path); win32_error(err); ret = WIMLIB_ERR_OPEN; goto fail; } - if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT && - stream_name_utf16 == NULL) + /* Check the attributes of the file we just opened, and remove + * encryption or compression if either was set by default but is not + * supposed to be set based on the WIM inode attributes. */ + if (!GetFileInformationByHandle(h, &file_info)) { + err = GetLastError(); + ERROR("Failed to get attributes of \"%ls\"", stream_path); + win32_error(err); + ret = WIMLIB_ERR_STAT; + goto fail_close_handle; + } + + /* Remove encryption? */ + if (file_info.dwFileAttributes & FILE_ATTRIBUTE_ENCRYPTED && + !(inode->i_attributes & FILE_ATTRIBUTE_ENCRYPTED)) { - DEBUG("Setting reparse data on \"%ls\"", path); - ret = win32_set_reparse_data(h, inode->i_reparse_tag, lte, path); + /* File defaulted to encrypted due to being in an encrypted + * directory, but is not actually supposed to be encrypted. + * + * This is a workaround, because I'm not aware of any way to + * directly (e.g. with CreateFileW()) create an unencrypted file + * in a directory with FILE_ATTRIBUTE_ENCRYPTED set. */ + ret = win32_decrypt_file(h, stream_path); + if (ret) + goto fail; /* win32_decrypt_file() closed the handle. */ + creationDisposition = OPEN_EXISTING; + goto try_open_again; + } + + /* Remove compression? */ + if (file_info.dwFileAttributes & FILE_ATTRIBUTE_COMPRESSED && + !(inode->i_attributes & FILE_ATTRIBUTE_COMPRESSED)) + { + /* Similar to the encrypted case, above, if the file defaulted + * to compressed due to being in an compressed directory, but is + * not actually supposed to be compressed, explicitly set the + * compression format to COMPRESSION_FORMAT_NONE. */ + ret = win32_set_compression_state(h, COMPRESSION_FORMAT_NONE, + stream_path); if (ret) goto fail_close_handle; - } else { - if (lte) { - DEBUG("Extracting \"%ls\" (len = %"PRIu64")", - stream_path, wim_resource_size(lte)); - ret = do_win32_extract_stream(h, lte); - if (ret) - goto fail_close_handle; - } } + /* Set compression and/or sparse attributes if needed */ + ret = win32_set_special_stream_attributes(h, inode, lte, path, + args->vol_flags); + + if (ret) + goto fail_close_handle; + + /* At this point we have at least created the needed stream with the + * appropriate attributes. We have yet to set the appropriate security + * descriptor and actually extract the stream data (other than for + * extracted files, which were already extracted). + * win32_finish_extract_stream() handles these additional steps. */ + ret = win32_finish_extract_stream(h, inode, lte, stream_path, + stream_name_utf16, args); + if (ret) + goto fail_close_handle; + + /* Done extracting the stream. Close the handle and return. */ DEBUG("Closing \"%ls\"", stream_path); if (!CloseHandle(h)) { err = GetLastError(); @@ -1252,7 +2272,7 @@ win32_extract_stream(const struct wim_inode *inode, fail_close_handle: CloseHandle(h); fail: - ERROR("Error extracting %ls", stream_path); + ERROR("Error extracting \"%ls\"", stream_path); out: return ret; } @@ -1260,50 +2280,160 @@ out: /* * Creates a file, directory, or reparse point and extracts all streams to it * (unnamed data stream and/or reparse point stream, plus any alternate data - * streams). This in Win32-specific code. + * streams). Handles sparse, compressed, and/or encrypted files. * * @inode: WIM inode for this file or directory. * @path: UTF-16LE external path to extract the inode to. + * @args: Additional extraction context. * * Returns 0 on success; nonzero on failure. */ static int win32_extract_streams(const struct wim_inode *inode, - const wchar_t *path, u64 *completed_bytes_p) + const wchar_t *path, struct apply_args *args) { struct wim_lookup_table_entry *unnamed_lte; int ret; + /* First extract the unnamed stream. */ + unnamed_lte = inode_unnamed_lte_resolved(inode); - ret = win32_extract_stream(inode, path, NULL, unnamed_lte); + ret = win32_extract_stream(inode, path, NULL, unnamed_lte, args); if (ret) goto out; - if (unnamed_lte) - *completed_bytes_p += wim_resource_size(unnamed_lte); + + /* Extract any named streams, if supported by the volume. */ + + if (!(args->vol_flags & FILE_NAMED_STREAMS)) + goto out; for (u16 i = 0; i < inode->i_num_ads; i++) { const struct wim_ads_entry *ads_entry = &inode->i_ads_entries[i]; - if (ads_entry->stream_name_nbytes != 0) { - /* Skip special UNIX data entries (see documentation for - * WIMLIB_ADD_IMAGE_FLAG_UNIX_DATA) */ - if (ads_entry->stream_name_nbytes == WIMLIB_UNIX_DATA_TAG_UTF16LE_NBYTES - && !memcmp(ads_entry->stream_name, - WIMLIB_UNIX_DATA_TAG_UTF16LE, - WIMLIB_UNIX_DATA_TAG_UTF16LE_NBYTES)) - continue; - ret = win32_extract_stream(inode, - path, - ads_entry->stream_name, - ads_entry->lte); - if (ret) - break; - if (ads_entry->lte) - *completed_bytes_p += wim_resource_size(ads_entry->lte); - } + + /* Skip the unnamed stream if it's in the ADS entries (we + * already extracted it...) */ + if (ads_entry->stream_name_nbytes == 0) + continue; + + /* Skip special UNIX data entries (see documentation for + * WIMLIB_ADD_IMAGE_FLAG_UNIX_DATA) */ + if (ads_entry->stream_name_nbytes == WIMLIB_UNIX_DATA_TAG_UTF16LE_NBYTES + && !memcmp(ads_entry->stream_name, + WIMLIB_UNIX_DATA_TAG_UTF16LE, + WIMLIB_UNIX_DATA_TAG_UTF16LE_NBYTES)) + continue; + + /* Extract the named stream */ + ret = win32_extract_stream(inode, + path, + ads_entry->stream_name, + ads_entry->lte, + args); + if (ret) + break; } out: return ret; } +/* If not done already, load the supported feature flags for the volume onto + * which the image is being extracted, and warn the user about any missing + * features that could be important. */ +static int +win32_check_vol_flags(const wchar_t *output_path, struct apply_args *args) +{ + if (args->have_vol_flags) + return 0; + + win32_get_vol_flags(output_path, &args->vol_flags); + args->have_vol_flags = true; + /* Warn the user about data that may not be extracted. */ + if (!(args->vol_flags & FILE_SUPPORTS_SPARSE_FILES)) + WARNING("Volume does not support sparse files!\n" + " Sparse files will be extracted as non-sparse."); + if (!(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS)) + WARNING("Volume does not support reparse points!\n" + " Reparse point data will not be extracted."); + if (!(args->vol_flags & FILE_NAMED_STREAMS)) { + WARNING("Volume does not support named data streams!\n" + " Named data streams will not be extracted."); + } + if (!(args->vol_flags & FILE_SUPPORTS_ENCRYPTION)) { + WARNING("Volume does not support encryption!\n" + " Encrypted files will be extracted as raw data."); + } + if (!(args->vol_flags & FILE_FILE_COMPRESSION)) { + WARNING("Volume does not support transparent compression!\n" + " Compressed files will be extracted as non-compressed."); + } + if (!(args->vol_flags & FILE_PERSISTENT_ACLS)) { + if (args->extract_flags & WIMLIB_EXTRACT_FLAG_STRICT_ACLS) { + ERROR("Strict ACLs requested, but the volume does not " + "support ACLs!"); + return WIMLIB_ERR_VOLUME_LACKS_FEATURES; + } else { + WARNING("Volume does not support persistent ACLS!\n" + " File permissions will not be extracted."); + } + } + return 0; +} + +/* + * Try extracting a hard link. + * + * @output_path: Path to link to be extracted. + * + * @inode: WIM inode that the link is to; inode->i_extracted_file + * the path to a name of the file that has already been + * extracted (we use this to create the hard link). + * + * @args: Additional apply context, used here to keep track of + * the number of times creating a hard link failed due to + * ERROR_INVALID_FUNCTION. This error should indicate that hard + * links are not supported by the volume, and we would like to + * warn the user a few times, but not too many times. + * + * Returns 0 if the hard link was successfully extracted. Returns + * WIMLIB_ERR_LINK (> 0) if an error occurred, other than hard links possibly + * being unsupported by the volume. Returns a negative value if creating the + * hard link failed due to ERROR_INVALID_FUNCTION. + */ +static int +win32_try_hard_link(const wchar_t *output_path, const struct wim_inode *inode, + struct apply_args *args) +{ + DWORD err; + + /* There is a volume flag for this (FILE_SUPPORTS_HARD_LINKS), + * but it's only available on Windows 7 and later. So no use + * even checking it, really. Instead, CreateHardLinkW() will + * apparently return ERROR_INVALID_FUNCTION if the volume does + * not support hard links. */ + DEBUG("Creating hard link \"%ls => %ls\"", + output_path, inode->i_extracted_file); + if (CreateHardLinkW(output_path, inode->i_extracted_file, NULL)) + return 0; + + err = GetLastError(); + if (err != ERROR_INVALID_FUNCTION) { + ERROR("Can't create hard link \"%ls => %ls\"", + output_path, inode->i_extracted_file); + win32_error(err); + return WIMLIB_ERR_LINK; + } else { + args->num_hard_links_failed++; + if (args->num_hard_links_failed < MAX_CREATE_HARD_LINK_WARNINGS) { + WARNING("Can't create hard link \"%ls => %ls\":\n" + " Volume does not support hard links!\n" + " Falling back to extracting a copy of the file.", + output_path, inode->i_extracted_file); + } else if (args->num_hard_links_failed == MAX_CREATE_HARD_LINK_WARNINGS) { + WARNING("Suppressing further hard linking warnings..."); + } + return -1; + } +} + /* Extract a file, directory, reparse point, or hard link to an * already-extracted file using the Win32 API */ int @@ -1314,34 +2444,47 @@ win32_do_apply_dentry(const wchar_t *output_path, { int ret; struct wim_inode *inode = dentry->d_inode; - DWORD err; + ret = win32_check_vol_flags(output_path, args); + if (ret) + return ret; if (inode->i_nlink > 1 && inode->i_extracted_file != NULL) { /* Linked file, with another name already extracted. Create a * hard link. */ - DEBUG("Creating hard link \"%ls => %ls\"", - output_path, inode->i_extracted_file); - if (!CreateHardLinkW(output_path, inode->i_extracted_file, NULL)) { - err = GetLastError(); - ERROR("Can't create hard link \"%ls => %ls\"", - output_path, inode->i_extracted_file); - win32_error(err); - return WIMLIB_ERR_LINK; - } + ret = win32_try_hard_link(output_path, inode, args); + if (ret >= 0) + return ret; + /* Negative return value from win32_try_hard_link() indicates + * that hard links are probably not supported by the volume. + * Fall back to extracting a copy of the file. */ + } + + /* If this is a reparse point and the volume does not support reparse + * points, just skip it completely. */ + if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT && + !(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS)) + { + WARNING("Skipping extraction of reparse point \"%ls\":\n" + " Not supported by destination filesystem", + output_path); } else { /* Create the file, directory, or reparse point, and extract the * data streams. */ - ret = win32_extract_streams(inode, output_path, - &args->progress.extract.completed_bytes); + ret = win32_extract_streams(inode, output_path, args); if (ret) return ret; - - if (inode->i_security_id >= 0 && - !(args->extract_flags & WIMLIB_EXTRACT_FLAG_NO_ACLS)) - { - ret = win32_set_security_data(inode, output_path, args); - if (ret) - return ret; + } + if (inode->i_extracted_file == NULL) { + const struct wim_lookup_table_entry *lte; + + /* Tally bytes extracted, including all alternate data streams, + * unless we extracted a hard link (or, at least extracted a + * name that was supposed to be a hard link) */ + for (unsigned i = 0; i <= inode->i_num_ads; i++) { + lte = inode_stream_lte_resolved(inode, i); + if (lte) + args->progress.extract.completed_bytes += + wim_resource_size(lte); } if (inode->i_nlink > 1) { /* Save extracted path for a later call to @@ -1349,7 +2492,7 @@ win32_do_apply_dentry(const wchar_t *output_path, * */ inode->i_extracted_file = WSTRDUP(output_path); if (!inode->i_extracted_file) - ret = WIMLIB_ERR_NOMEM; + return WIMLIB_ERR_NOMEM; } } return 0; @@ -1366,6 +2509,19 @@ win32_do_apply_dentry_timestamps(const wchar_t *path, HANDLE h; const struct wim_inode *inode = dentry->d_inode; + if (inode->i_attributes & FILE_ATTRIBUTE_REPARSE_POINT && + !(args->vol_flags & FILE_SUPPORTS_REPARSE_POINTS)) + { + /* Skip reparse points not extracted */ + return 0; + } + + /* Windows doesn't let you change the timestamps of the root directory + * (at least on FAT, which is dumb but expected since FAT doesn't store + * any metadata about the root directory...) */ + if (path_is_root_of_drive(path)) + return 0; + DEBUG("Opening \"%ls\" to set timestamps", path); h = win32_open_existing_file(path, FILE_WRITE_ATTRIBUTES); if (h == INVALID_HANDLE_VALUE) { @@ -1404,16 +2560,21 @@ out: int fsync(int fd) { - HANDLE h = (HANDLE)_get_osfhandle(fd); + DWORD err; + HANDLE h; + + h = (HANDLE)_get_osfhandle(fd); if (h == INVALID_HANDLE_VALUE) { + err = GetLastError(); ERROR("Could not get Windows handle for file descriptor"); - win32_error(GetLastError()); + win32_error(err); errno = EBADF; return -1; } if (!FlushFileBuffers(h)) { + err = GetLastError(); ERROR("Could not flush file buffers to disk"); - win32_error(GetLastError()); + win32_error(err); errno = EIO; return -1; } @@ -1437,33 +2598,30 @@ realpath(const wchar_t *path, wchar_t *resolved_path) { DWORD ret; wimlib_assert(resolved_path == NULL); + DWORD err; ret = GetFullPathNameW(path, 0, NULL, NULL); - if (!ret) + if (!ret) { + err = GetLastError(); goto fail_win32; + } resolved_path = TMALLOC(ret); if (!resolved_path) - goto fail; + goto out; ret = GetFullPathNameW(path, ret, resolved_path, NULL); if (!ret) { + err = GetLastError(); free(resolved_path); + resolved_path = NULL; goto fail_win32; } - return resolved_path; + goto out; fail_win32: - win32_error(GetLastError()); -fail: - return NULL; -} - -char * -nl_langinfo(nl_item item) -{ - wimlib_assert(item == CODESET); - static char buf[64]; - strcpy(buf, "Unknown"); - return buf; + win32_error(err); + errno = -1; +out: + return resolved_path; } /* rename() on Windows fails if the destination file exists. And we need to @@ -1479,7 +2637,7 @@ win32_rename_replacement(const wchar_t *oldpath, const wchar_t *newpath) ERROR("MoveFileEx(): Can't rename \"%ls\" to \"%ls\"", oldpath, newpath); win32_error(err); - errno = 0; + errno = -1; return -1; } } @@ -1520,8 +2678,26 @@ fail_close_handle: fail: if (err == NO_ERROR) err = GetLastError(); - ERROR("Can't truncate %ls to %"PRIu64" bytes", path, size); + ERROR("Can't truncate \"%ls\" to %"PRIu64" bytes", path, size); win32_error(err); errno = -1; return -1; } + + +/* This really could be replaced with _wcserror_s, but this doesn't seem to + * actually be available in MSVCRT.DLL on Windows XP (perhaps it's statically + * linked in by Visual Studio...?). */ +extern int +win32_strerror_r_replacement(int errnum, wchar_t *buf, size_t buflen) +{ + static pthread_mutex_t strerror_lock = PTHREAD_MUTEX_INITIALIZER; + + pthread_mutex_lock(&strerror_lock); + mbstowcs(buf, strerror(errnum), buflen); + buf[buflen - 1] = '\0'; + pthread_mutex_unlock(&strerror_lock); + return 0; +} + +#endif /* __WIN32__ */