X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fverify.c;h=e11561efcf790021799ea9f4193924f38f5f4146;hp=a4fb17c03a02a1d13339e0e3ed49d89bb037a5dd;hb=3d71e838902b0b6f5321484ca965c1cd888fb91e;hpb=8cd28723b294826e2d0c95d7e44bd3be1af80628

diff --git a/src/verify.c b/src/verify.c
index a4fb17c0..e11561ef 100644
--- a/src/verify.c
+++ b/src/verify.c
@@ -1,237 +1,187 @@
 /*
  * verify.c
  *
- * Some functions to verify that stuff in the WIM is valid.  Of course, not
- * *all* the verifications of the input data are in this file.
+ * Verify WIM files.
  */
 
 /*
- * Copyright (C) 2012, 2013 Eric Biggers
+ * Copyright (C) 2012, 2013, 2014 Eric Biggers
  *
- * This file is part of wimlib, a library for working with WIM files.
+ * This file is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option) any
+ * later version.
  *
- * wimlib is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 3 of the License, or (at your option)
- * any later version.
- *
- * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
- * A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * This file is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
  * details.
  *
- * You should have received a copy of the GNU General Public License
- * along with wimlib; if not, see http://www.gnu.org/licenses/.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this file; if not, see http://www.gnu.org/licenses/.
  */
 
 #ifdef HAVE_CONFIG_H
 #  include "config.h"
 #endif
 
+#include "wimlib/blob_table.h"
 #include "wimlib/dentry.h"
 #include "wimlib/error.h"
-#include "wimlib/lookup_table.h"
 #include "wimlib/metadata.h"
+#include "wimlib/progress.h"
 #include "wimlib/security.h"
 
 static int
-verify_inode(struct wim_inode *inode, const WIMStruct *w)
+append_blob_to_list(struct blob_descriptor *blob, void *_list)
 {
-	const struct wim_lookup_table *table = w->lookup_table;
-	const struct wim_security_data *sd = wim_const_security_data(w);
-	struct wim_dentry *first_dentry = inode_first_dentry(inode);
-	struct wim_dentry *dentry;
-
-	/* Check the security ID.  -1 is valid and means "no security
-	 * descriptor".  Anything else has to be a valid index into the WIM
-	 * image's security descriptors table. */
-	if (inode->i_security_id < -1 ||
-	    (inode->i_security_id >= 0 &&
-	     inode->i_security_id >= sd->num_entries))
-	{
-		WARNING("\"%"TS"\" has an invalid security ID (%d)",
-			dentry_full_path(first_dentry), inode->i_security_id);
-		inode->i_security_id = -1;
-	}
-
-	/* Check that lookup table entries for all the inode's stream exist,
-	 * except if the SHA1 message digest is all 0's, which indicates an
-	 * empty stream.
-	 *
-	 * This check is skipped on split WIMs. */
-	if (w->hdr.total_parts == 1 && !inode->i_resolved) {
-		for (unsigned i = 0; i <= inode->i_num_ads; i++) {
-			struct wim_lookup_table_entry *lte;
-			const u8 *hash;
-			hash = inode_stream_hash(inode, i);
-			lte = __lookup_resource(table, hash);
-			if (!lte && !is_zero_hash(hash)) {
-				ERROR("Could not find lookup table entry for stream "
-				      "%u of dentry `%"TS"'",
-				      i, dentry_full_path(first_dentry));
-				return WIMLIB_ERR_INVALID_DENTRY;
-			}
-			if (lte)
-				lte->real_refcnt += inode->i_nlink;
-		}
-	}
-
-	/* Make sure there is only one unnamed data stream. */
-	unsigned num_unnamed_streams = 0;
-	for (unsigned i = 0; i <= inode->i_num_ads; i++) {
-		const u8 *hash;
-		hash = inode_stream_hash(inode, i);
-		if (inode_stream_name_nbytes(inode, i) == 0 && !is_zero_hash(hash))
-			num_unnamed_streams++;
-	}
-	if (num_unnamed_streams > 1) {
-		WARNING("\"%"TS"\" has multiple (%u) un-named streams",
-			dentry_full_path(first_dentry), num_unnamed_streams);
-	}
+	list_add(&blob->extraction_list, (struct list_head *)_list);
+	return 0;
+}
 
-	/* Files cannot have multiple DOS names, even if they have multiple
-	 * names in multiple directories (i.e. hard links).
-	 * Source: NTFS-3g authors. */
-	struct wim_dentry *dentry_with_dos_name = NULL;
-	inode_for_each_dentry(dentry, inode) {
-		if (dentry_has_short_name(dentry)) {
-			if (dentry_with_dos_name) {
-				/* This was previously an error, but if we
-				 * capture a WIM from UDF on Windows, hard links
-				 * are supported but DOS names are automatically
-				 * generated for all names for an inode.  */
-			#if 0
-				ERROR("Hard-linked file has a DOS name at "
-				      "both `%"TS"' and `%"TS"'",
-				      dentry_full_path(dentry_with_dos_name),
-				      dentry_full_path(dentry));
-				return WIMLIB_ERR_INVALID_DENTRY;
-			#else
-				dentry->dos_name_invalid = 1;
-			#endif
-			}
-			dentry_with_dos_name = dentry;
-		}
-	}
+struct verify_blob_list_ctx {
+	wimlib_progress_func_t progfunc;
+	void *progctx;
+	union wimlib_progress_info *progress;
+	u64 next_progress;
+	u64 cur_blob_offset;
+	u64 cur_blob_size;
+};
 
-	/* Directories with multiple links have not been tested. XXX */
-	if (inode->i_nlink > 1 && inode->i_attributes & FILE_ATTRIBUTE_DIRECTORY) {
-		ERROR("Hard-linked directory `%"TS"' is unsupported",
-		      dentry_full_path(first_dentry));
-		return WIMLIB_ERR_INVALID_DENTRY;
-	}
+static int
+verify_begin_blob(struct blob_descriptor *blob, void *_ctx)
+{
+	struct verify_blob_list_ctx *ctx = _ctx;
 
-	inode->i_verified = 1;
+	ctx->cur_blob_offset = 0;
+	ctx->cur_blob_size = blob->size;
 	return 0;
 }
 
-/* Run some miscellaneous verifications on a WIM dentry */
-int
-verify_dentry(struct wim_dentry *dentry, void *wim)
+static int
+verify_consume_chunk(const void *chunk, size_t size, void *_ctx)
 {
-	int ret;
-	WIMStruct *w = wim;
+	struct verify_blob_list_ctx *ctx = _ctx;
+	union wimlib_progress_info *progress = ctx->progress;
+
+	ctx->cur_blob_offset += size;
+	if (ctx->cur_blob_offset == ctx->cur_blob_size)
+		progress->verify_streams.completed_streams++;
 
-	/* Verify the associated inode, but only one time no matter how many
-	 * dentries it has (unless we are doing a full verification of the WIM,
-	 * in which case we need to force the inode to be verified again.) */
-	if (!dentry->d_inode->i_verified) {
-		ret = verify_inode(dentry->d_inode, w);
+	progress->verify_streams.completed_bytes += size;
+
+	if (progress->verify_streams.completed_bytes >= ctx->next_progress) {
+
+		int ret = call_progress(ctx->progfunc,
+					WIMLIB_PROGRESS_MSG_VERIFY_STREAMS,
+					progress, ctx->progctx);
 		if (ret)
 			return ret;
-	}
 
-	/* Make sure root dentry is unnamed, while every other dentry has at
-	 * least a long name.
-	 *
-	 * I am assuming that dentries having only a DOS name is illegal; i.e.,
-	 * Windows will always combine the Win32 name and DOS name for a file
-	 * into a single WIM dentry, even if they are stored separately on NTFS.
-	 * (This seems to be the case...) */
-	if (dentry_is_root(dentry)) {
-		if (dentry_has_long_name(dentry) || dentry_has_short_name(dentry)) {
-			ERROR("The root dentry has a nonempty name!");
-			return WIMLIB_ERR_INVALID_DENTRY;
-		}
-	} else {
-		if (!dentry_has_long_name(dentry)) {
-			ERROR("Dentry `%"TS"' has no long name!",
-			      dentry_full_path(dentry));
-			return WIMLIB_ERR_INVALID_DENTRY;
-		}
+		set_next_progress(progress->verify_streams.completed_bytes,
+				  progress->verify_streams.total_bytes,
+				  &ctx->next_progress);
 	}
-
-#if 0
-	/* Check timestamps */
-	if (inode->i_last_access_time < inode->i_creation_time ||
-	    inode->i_last_write_time < inode->i_creation_time) {
-		WARNING("Dentry `%"TS"' was created after it was last accessed or "
-			"written to", dentry->full_path);
-	}
-#endif
-
 	return 0;
 }
 
 static int
-image_run_full_verifications(WIMStruct *w)
+verify_file_data_present(struct wim_image_metadata *imd,
+			 struct blob_table *blob_table)
 {
-	struct wim_image_metadata *imd;
 	struct wim_inode *inode;
+	int ret;
 
-	imd = wim_get_current_image_metadata(w);
-	image_for_each_inode(inode, imd)
-		inode->i_verified = 0;
-	return for_dentry_in_tree(imd->root_dentry, verify_dentry, w);
-}
-
-static int
-lte_fix_refcnt(struct wim_lookup_table_entry *lte, void *ctr)
-{
-	if (lte->refcnt != lte->real_refcnt) {
-	#ifdef ENABLE_ERROR_MESSAGES
-		WARNING("The following lookup table entry has a reference "
-			"count of %u, but", lte->refcnt);
-		WARNING("We found %u references to it",
-			lte->real_refcnt);
-		print_lookup_table_entry(lte, stderr);
-	#endif
-		lte->refcnt = lte->real_refcnt;
-		++*(unsigned long *)ctr;
+	image_for_each_inode(inode, imd) {
+		ret = inode_resolve_streams(inode, blob_table, false);
+		if (ret)
+			return ret;
 	}
 	return 0;
 }
 
-/* Ideally this would be unnecessary... however, the WIMs for Windows 8 are
- * screwed up because some lookup table entries are referenced more times than
- * their stated reference counts.  So theoretically, if we delete all the
- * references to a stream and then remove it, it might still be referenced
- * somewhere else, making a file be missing from the WIM... So, work around this
- * problem by looking at ALL the images to re-calculate the reference count of
- * EVERY lookup table entry.  This only absolutely has to be done before an image
- * is deleted or before an image is mounted read-write. */
-int
-wim_run_full_verifications(WIMStruct *w)
+/* API function documented in wimlib.h  */
+WIMLIBAPI int
+wimlib_verify_wim(WIMStruct *wim, int verify_flags)
 {
 	int ret;
+	LIST_HEAD(blob_list);
+	union wimlib_progress_info progress;
+	struct verify_blob_list_ctx ctx;
+	struct blob_descriptor *blob;
+	struct read_blob_callbacks cbs = {
+		.begin_blob	= verify_begin_blob,
+		.consume_chunk	= verify_consume_chunk,
+		.ctx		= &ctx,
+	};
+
+	/* Check parameters  */
+
+	if (!wim)
+		return WIMLIB_ERR_INVALID_PARAM;
+
+	if (verify_flags)
+		return WIMLIB_ERR_INVALID_PARAM;
+
+	/* Verify the images  */
+
+	if (wim_has_metadata(wim)) {
+
+		memset(&progress, 0, sizeof(progress));
+		progress.verify_image.wimfile = wim->filename;
+		progress.verify_image.total_images = wim->hdr.image_count;
 
-	for_lookup_table_entry(w->lookup_table, lte_zero_real_refcnt, NULL);
-
-	w->all_images_verified = 1; /* Set *before* image_run_full_verifications,
-				       because of check in read_metadata_resource() */
-	ret = for_image(w, WIMLIB_ALL_IMAGES, image_run_full_verifications);
-	if (ret == 0) {
-		unsigned long num_ltes_with_bogus_refcnt = 0;
-		for_lookup_table_entry(w->lookup_table, lte_fix_refcnt,
-				       &num_ltes_with_bogus_refcnt);
-		if (num_ltes_with_bogus_refcnt != 0) {
-			WARNING("A total of %lu entries in the WIM's stream "
-				"lookup table had to have\n"
-				"          their reference counts fixed.",
-				num_ltes_with_bogus_refcnt);
+		for (int i = 1; i <= wim->hdr.image_count; i++) {
+
+			progress.verify_image.current_image = i;
+
+			ret = call_progress(wim->progfunc, WIMLIB_PROGRESS_MSG_BEGIN_VERIFY_IMAGE,
+					    &progress, wim->progctx);
+			if (ret)
+				return ret;
+
+			ret = select_wim_image(wim, i);
+			if (ret)
+				return ret;
+
+			ret = verify_file_data_present(wim_get_current_image_metadata(wim),
+						       wim->blob_table);
+			if (ret)
+				return ret;
+
+			ret = call_progress(wim->progfunc, WIMLIB_PROGRESS_MSG_END_VERIFY_IMAGE,
+					    &progress, wim->progctx);
+			if (ret)
+				return ret;
 		}
 	} else {
-		w->all_images_verified = 0;
+		WARNING("\"%"TS"\" does not contain image metadata.  Skipping image verification.",
+			wim->filename);
 	}
-	return ret;
+
+	/* Verify the blobs: SHA-1 message digests must match  */
+
+	for_blob_in_table(wim->blob_table, append_blob_to_list, &blob_list);
+
+	memset(&progress, 0, sizeof(progress));
+
+	progress.verify_streams.wimfile = wim->filename;
+	list_for_each_entry(blob, &blob_list, extraction_list) {
+		progress.verify_streams.total_streams++;
+		progress.verify_streams.total_bytes += blob->size;
+	}
+
+	ctx.progfunc = wim->progfunc;
+	ctx.progctx = wim->progctx;
+	ctx.progress = &progress;
+	ctx.next_progress = 0;
+
+	ret = call_progress(ctx.progfunc, WIMLIB_PROGRESS_MSG_VERIFY_STREAMS,
+			    ctx.progress, ctx.progctx);
+	if (ret)
+		return ret;
+
+	return read_blob_list(&blob_list,
+			      offsetof(struct blob_descriptor, extraction_list),
+			      &cbs, VERIFY_BLOB_HASHES);
 }