#include "wimlib/error.h"
#include "wimlib/paths.h"
#include "wimlib/reparse.h"
+#include "wimlib/win32_vss.h"
#include "wimlib/wof.h"
struct winnt_scan_ctx {
/* True if WOF is definitely not attached to the volume being scanned;
* false if it may be */
bool wof_not_attached;
+
+ /* A reference to the VSS snapshot being used, or NULL if none */
+ struct vss_snapshot *snapshot;
};
static inline const wchar_t *
return full_path + 4;
}
+/* Description of where data is located on a Windows filesystem */
+struct windows_file {
+
+ /* Is the data the raw encrypted data of an EFS-encrypted file? */
+ u64 is_encrypted : 1;
+
+ /* The file's LCN (logical cluster number) for sorting, or 0 if unknown.
+ */
+ u64 sort_key : 63;
+
+ /* A reference to the VSS snapshot containing the file, or NULL if none.
+ */
+ struct vss_snapshot *snapshot;
+
+ /* The path to the file. If 'is_encrypted=0' this is an NT namespace
+ * path; if 'is_encrypted=1' this is a Win32 namespace path. */
+ wchar_t path[];
+};
+
+/* Allocate a 'struct windows_file' to describe the location of a data stream.
+ */
+static struct windows_file *
+alloc_windows_file(bool is_encrypted, struct vss_snapshot *snapshot,
+ const wchar_t *path, size_t path_nchars,
+ const wchar_t *stream_name, size_t stream_name_nchars)
+{
+ struct windows_file *file;
+ wchar_t *p;
+
+ file = MALLOC(sizeof(struct windows_file) +
+ (path_nchars + (stream_name_nchars ? 1 : 0) +
+ stream_name_nchars + 1) * sizeof(wchar_t));
+ if (!file)
+ return NULL;
+
+ file->is_encrypted = is_encrypted;
+ file->sort_key = 0;
+ file->snapshot = vss_get_snapshot(snapshot);
+ p = wmempcpy(file->path, path, path_nchars);
+ if (stream_name_nchars) {
+ /* Named data stream */
+ *p++ = L':';
+ p = wmempcpy(p, stream_name, stream_name_nchars);
+ }
+ *p = L'\0';
+ return file;
+}
+
+/* Add a stream, located on a Windows filesystem, to the specified WIM inode.
+ */
+static int
+add_stream(struct wim_inode *inode, bool is_encrypted,
+ struct vss_snapshot *snapshot, u64 size,
+ const wchar_t *path, size_t path_nchars,
+ int stream_type, const utf16lechar *stream_name, size_t stream_name_nchars,
+ struct list_head *unhashed_blobs)
+{
+ struct blob_descriptor *blob = NULL;
+ struct wim_inode_stream *strm;
+
+ /* If the stream is nonempty, create a blob descriptor for it. */
+ if (size) {
+ blob = new_blob_descriptor();
+ if (!blob)
+ goto err_nomem;
+
+ blob->windows_file = alloc_windows_file(is_encrypted, snapshot,
+ path, path_nchars,
+ stream_name,
+ stream_name_nchars);
+ if (!blob->windows_file)
+ goto err_nomem;
+
+ blob->blob_location = BLOB_IN_WINDOWS_FILE;
+ blob->file_inode = inode;
+ blob->size = size;
+ }
+
+ strm = inode_add_stream(inode, stream_type, stream_name, blob);
+ if (!strm)
+ goto err_nomem;
+
+ prepare_unhashed_blob(blob, inode, strm->stream_id, unhashed_blobs);
+ return 0;
+
+err_nomem:
+ free_blob_descriptor(blob);
+ return WIMLIB_ERR_NOMEM;
+}
+
+struct windows_file *
+clone_windows_file(const struct windows_file *file)
+{
+ struct windows_file *new;
+
+ new = memdup(file, sizeof(struct windows_file) +
+ (wcslen(file->path) + 1) * sizeof(wchar_t));
+ if (new)
+ vss_get_snapshot(new->snapshot);
+ return new;
+}
+
+void
+free_windows_file(struct windows_file *file)
+{
+ vss_put_snapshot(file->snapshot);
+ FREE(file);
+}
+
+int
+cmp_windows_files(const struct windows_file *file1,
+ const struct windows_file *file2)
+{
+ /* Compare by starting LCN (logical cluster number) */
+ int v = cmp_u64(file1->sort_key, file2->sort_key);
+ if (v)
+ return v;
+
+ /* Compare files by path: just a heuristic that will place files
+ * in the same directory next to each other. */
+ return wcscmp(file1->path, file2->path);
+}
+
+const wchar_t *
+get_windows_file_path(const struct windows_file *file)
+{
+ return file->path;
+}
+
/*
* If cur_dir is not NULL, open an existing file relative to the already-open
* directory cur_dir.
return status;
}
-/* Read the first @size bytes from the file, or named data stream of a file,
- * described by @blob. */
-int
-read_winnt_stream_prefix(const struct blob_descriptor *blob, u64 size,
+static int
+read_winnt_stream_prefix(const wchar_t *path, u64 size,
const struct read_blob_callbacks *cbs)
{
- const wchar_t *path;
HANDLE h;
NTSTATUS status;
u8 buf[BUFFER_SIZE];
u64 bytes_remaining;
int ret;
- /* This is an NT namespace path. */
- path = blob->file_on_disk;
-
status = winnt_openat(NULL, path, wcslen(path),
FILE_READ_DATA | SYNCHRONIZE, &h);
if (!NT_SUCCESS(status)) {
return ERROR_SUCCESS;
}
-int
-read_win32_encrypted_file_prefix(const struct blob_descriptor *blob,
- u64 size,
+static int
+read_win32_encrypted_file_prefix(const wchar_t *path, bool is_dir, u64 size,
const struct read_blob_callbacks *cbs)
{
struct win32_encrypted_read_ctx export_ctx;
int ret;
DWORD flags = 0;
- if (blob->file_inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY)
+ if (is_dir)
flags |= CREATE_FOR_DIR;
export_ctx.cbs = cbs;
export_ctx.wimlib_err_code = 0;
export_ctx.bytes_remaining = size;
- err = OpenEncryptedFileRaw(blob->file_on_disk, flags, &file_ctx);
+ err = OpenEncryptedFileRaw(path, flags, &file_ctx);
if (err != ERROR_SUCCESS) {
win32_error(err,
L"Failed to open encrypted file \"%ls\" for raw read",
- printable_path(blob->file_on_disk));
+ printable_path(path));
return WIMLIB_ERR_OPEN;
}
err = ReadEncryptedFileRaw(win32_encrypted_export_cb,
if (ret == 0) {
win32_error(err,
L"Failed to read encrypted file \"%ls\"",
- printable_path(blob->file_on_disk));
+ printable_path(path));
ret = WIMLIB_ERR_READ;
}
} else if (export_ctx.bytes_remaining != 0) {
ERROR("Only could read %"PRIu64" of %"PRIu64" bytes from "
"encrypted file \"%ls\"",
size - export_ctx.bytes_remaining, size,
- printable_path(blob->file_on_disk));
+ printable_path(path));
ret = WIMLIB_ERR_READ;
} else {
ret = 0;
return ret;
}
+/* Read the first @size bytes from the file, or named data stream of a file,
+ * described by @blob. */
+int
+read_windows_file_prefix(const struct blob_descriptor *blob, u64 size,
+ const struct read_blob_callbacks *cbs)
+{
+ const struct windows_file *file = blob->windows_file;
+
+ if (unlikely(file->is_encrypted)) {
+ bool is_dir = (blob->file_inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY);
+ return read_win32_encrypted_file_prefix(file->path, is_dir, size, cbs);
+ }
+
+ return read_winnt_stream_prefix(file->path, size, cbs);
+}
+
/*
* Load the short name of a file into a WIM dentry.
*/
}
static int
-winnt_scan_efsrpc_raw_data(struct wim_inode *inode, const wchar_t *nt_path,
- struct list_head *unhashed_blobs)
+winnt_scan_efsrpc_raw_data(struct wim_inode *inode,
+ wchar_t *path, size_t path_nchars,
+ struct list_head *unhashed_blobs,
+ struct vss_snapshot *snapshot)
{
- struct blob_descriptor *blob;
- struct wim_inode_stream *strm;
+ const bool is_dir = (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY);
+ u64 size;
int ret;
- blob = new_blob_descriptor();
- if (!blob)
- goto err_nomem;
-
- blob->file_on_disk = WCSDUP(nt_path);
- if (!blob->file_on_disk)
- goto err_nomem;
- blob->blob_location = BLOB_WIN32_ENCRYPTED;
-
/* OpenEncryptedFileRaw() expects a Win32 name. */
- wimlib_assert(!wmemcmp(blob->file_on_disk, L"\\??\\", 4));
- blob->file_on_disk[1] = L'\\';
+ wimlib_assert(!wmemcmp(path, L"\\??\\", 4));
+ path[1] = L'\\';
- blob->file_inode = inode;
-
- ret = win32_get_encrypted_file_size(blob->file_on_disk,
- (inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY),
- &blob->size);
+ ret = win32_get_encrypted_file_size(path, is_dir, &size);
if (ret)
- goto err;
+ goto out;
/* Empty EFSRPC data does not make sense */
- wimlib_assert(blob->size != 0);
-
- strm = inode_add_stream(inode, STREAM_TYPE_EFSRPC_RAW_DATA,
- NO_STREAM_NAME, blob);
- if (!strm)
- goto err_nomem;
-
- prepare_unhashed_blob(blob, inode, strm->stream_id, unhashed_blobs);
- return 0;
+ wimlib_assert(size != 0);
-err_nomem:
- ret = WIMLIB_ERR_NOMEM;
-err:
- free_blob_descriptor(blob);
+ ret = add_stream(inode, true, snapshot, size,
+ path, path_nchars,
+ STREAM_TYPE_EFSRPC_RAW_DATA, NO_STREAM_NAME, 0,
+ unhashed_blobs);
+out:
+ path[1] = L'?';
return ret;
}
return true;
}
-/* Build the path to the data stream. For unnamed streams, this is simply the
- * path to the file. For named streams, this is the path to the file, followed
- * by a colon, followed by the stream name. */
-static wchar_t *
-build_data_stream_path(const wchar_t *path, size_t path_nchars,
- const wchar_t *stream_name, size_t stream_name_nchars)
-{
- size_t stream_path_nchars;
- wchar_t *stream_path;
- wchar_t *p;
-
- stream_path_nchars = path_nchars;
- if (stream_name_nchars)
- stream_path_nchars += 1 + stream_name_nchars;
-
- stream_path = MALLOC((stream_path_nchars + 1) * sizeof(wchar_t));
- if (stream_path) {
- p = wmempcpy(stream_path, path, path_nchars);
- if (stream_name_nchars) {
- *p++ = L':';
- p = wmempcpy(p, stream_name, stream_name_nchars);
- }
- *p++ = L'\0';
- }
- return stream_path;
-}
-
static int
winnt_scan_data_stream(const wchar_t *path, size_t path_nchars,
wchar_t *raw_stream_name, size_t raw_stream_name_nchars,
u64 stream_size,
- struct wim_inode *inode, struct list_head *unhashed_blobs)
+ struct wim_inode *inode, struct list_head *unhashed_blobs,
+ struct vss_snapshot *snapshot)
{
wchar_t *stream_name;
size_t stream_name_nchars;
- struct blob_descriptor *blob;
- struct wim_inode_stream *strm;
/* Given the raw stream name (which is something like
* :streamname:$DATA), extract just the stream name part (streamname).
stream_name[stream_name_nchars] = L'\0';
- /* If the stream is non-empty, set up a blob descriptor for it. */
- if (stream_size != 0) {
- blob = new_blob_descriptor();
- if (!blob)
- goto err_nomem;
- blob->file_on_disk = build_data_stream_path(path,
- path_nchars,
- stream_name,
- stream_name_nchars);
- if (!blob->file_on_disk)
- goto err_nomem;
- blob->blob_location = BLOB_IN_WINNT_FILE_ON_DISK;
- blob->size = stream_size;
- blob->file_inode = inode;
- } else {
- blob = NULL;
- }
-
- strm = inode_add_stream(inode, STREAM_TYPE_DATA, stream_name, blob);
- if (!strm)
- goto err_nomem;
-
- prepare_unhashed_blob(blob, inode, strm->stream_id, unhashed_blobs);
- return 0;
-
-err_nomem:
- free_blob_descriptor(blob);
- return WIMLIB_ERR_NOMEM;
+ return add_stream(inode, false, snapshot, stream_size,
+ path, path_nchars,
+ STREAM_TYPE_DATA, stream_name, stream_name_nchars,
+ unhashed_blobs);
}
/*
static noinline_for_stack int
winnt_scan_data_streams(HANDLE h, const wchar_t *path, size_t path_nchars,
struct wim_inode *inode, struct list_head *unhashed_blobs,
- u64 file_size, u32 vol_flags)
+ u64 file_size, u32 vol_flags,
+ struct vss_snapshot *snapshot)
{
int ret;
u8 _buf[4096] _aligned_attribute(8);
info->StreamName,
info->StreamNameLength / 2,
info->StreamSize.QuadPart,
- inode, unhashed_blobs);
+ inode, unhashed_blobs,
+ snapshot);
if (ret)
goto out_free_buf;
{
wchar_t stream_name[] = L"::$DATA";
ret = winnt_scan_data_stream(path, path_nchars, stream_name, 7,
- file_size, inode, unhashed_blobs);
+ file_size, inode, unhashed_blobs,
+ snapshot);
}
out_free_buf:
/* Free buffer if allocated on heap. */
for (unsigned i = 0; i < inode->i_num_streams; i++) {
struct wim_inode_stream *strm = &inode->i_streams[i];
struct blob_descriptor *blob = stream_blob_resolved(strm);
- if (blob && (blob->blob_location == BLOB_IN_WINNT_FILE_ON_DISK ||
- blob->blob_location == BLOB_WIN32_ENCRYPTED))
- blob->sort_key = sort_key;
+ if (blob && blob->blob_location == BLOB_IN_WINDOWS_FILE)
+ blob->windows_file->sort_key = sort_key;
}
}
* needed. */
(*func_NtClose)(h);
h = NULL;
- ret = winnt_scan_efsrpc_raw_data(inode, full_path,
- params->unhashed_blobs);
+ ret = winnt_scan_efsrpc_raw_data(inode,
+ full_path,
+ full_path_nchars,
+ params->unhashed_blobs,
+ ctx->snapshot);
if (ret)
goto out;
} else {
inode,
params->unhashed_blobs,
file_info.end_of_file,
- ctx->vol_flags);
+ ctx->vol_flags,
+ ctx->snapshot);
if (ret)
goto out;
}
const wchar_t *root_disk_path,
struct capture_params *params)
{
- wchar_t *path;
- int ret;
+ wchar_t *path = NULL;
+ struct winnt_scan_ctx ctx = {};
UNICODE_STRING ntpath;
- struct winnt_scan_ctx ctx;
size_t ntpath_nchars;
+ int ret;
/* WARNING: There is no check for overflow later when this buffer is
* being used! But it's as long as the maximum path length understood
if (!path)
return WIMLIB_ERR_NOMEM;
- ret = win32_path_to_nt_path(root_disk_path, &ntpath);
+ if (params->add_flags & WIMLIB_ADD_FLAG_SNAPSHOT)
+ ret = vss_create_snapshot(root_disk_path, &ntpath, &ctx.snapshot);
+ else
+ ret = win32_path_to_nt_path(root_disk_path, &ntpath);
+
if (ret)
- goto out_free_path;
+ goto out;
if (ntpath.Length < 4 * sizeof(wchar_t) ||
ntpath.Length > WINDOWS_NT_MAX_PATH * sizeof(wchar_t) ||
}
HeapFree(GetProcessHeap(), 0, ntpath.Buffer);
if (ret)
- goto out_free_path;
-
- memset(&ctx, 0, sizeof(ctx));
+ goto out;
ret = winnt_build_dentry_tree_recursive(root_ret, NULL,
path, ntpath_nchars,
L"", 0, params, &ctx);
-out_free_path:
+out:
+ vss_put_snapshot(ctx.snapshot);
FREE(path);
if (ret == 0)
winnt_do_scan_warnings(root_disk_path, &ctx);
git://wimlib.net / wimlib / blobdiff