X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fverify.c;h=063834fbeda83aa879b4c41147aadb9484c01bf8;hp=201132aec51f91cecd980b2a3d4773a88086d271;hb=5d3d469e410dc5f4a28814ad231336fc174cba56;hpb=f8698b9c814a62a117982701b9551f699553b2a4

diff --git a/src/verify.c b/src/verify.c
index 201132ae..063834fb 100644
--- a/src/verify.c
+++ b/src/verify.c
@@ -1,15 +1,12 @@
 /*
  * 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 stream reference counts.
  */
 
 /*
  * Copyright (C) 2012, 2013 Eric Biggers
  *
- * wimlib - Library for working with WIM files
- *
  * This file is part of wimlib, a library for working with WIM files.
  *
  * wimlib is free software; you can redistribute it and/or modify it under the
@@ -26,180 +23,59 @@
  * along with wimlib; if not, see http://www.gnu.org/licenses/.
  */
 
-#include "wimlib_internal.h"
-#include "dentry.h"
-#include "lookup_table.h"
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "wimlib/dentry.h"
+#include "wimlib/error.h"
+#include "wimlib/lookup_table.h"
+#include "wimlib/metadata.h"
+#include "wimlib/security.h"
 
 static int
-verify_inode(struct wim_inode *inode, const WIMStruct *w)
+lte_fix_refcnt(struct wim_lookup_table_entry *lte, void *ctr)
 {
-	const struct wim_lookup_table *table = w->lookup_table;
-	const struct wim_security_data *sd = wim_const_security_data(w);
-	const struct wim_dentry *first_dentry = inode_first_dentry(inode);
-	const struct wim_dentry *dentry;
-	int ret = WIMLIB_ERR_INVALID_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) {
-		ERROR("Dentry `%"TS"' has an invalid security ID (%d)",
-		      first_dentry->full_path, inode->i_security_id);
-		goto out;
-	}
-
-	if (inode->i_security_id >= sd->num_entries) {
-		ERROR("Dentry `%"TS"' has an invalid security ID (%d) "
-		      "(there are only %u entries in the security table)",
-		      first_dentry->full_path, inode->i_security_id,
-		      sd->num_entries);
-		goto out;
-	}
-
-	/* 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) {
-		for (unsigned i = 0; i <= inode->i_num_ads; i++) {
-			struct wim_lookup_table_entry *lte;
-			const u8 *hash;
-			hash = inode_stream_hash_unresolved(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, first_dentry->full_path);
-				goto out;
-			}
-			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_unresolved(inode, i);
-		if (inode_stream_name_nbytes(inode, i) == 0 && !is_zero_hash(hash))
-			num_unnamed_streams++;
-	}
-	if (num_unnamed_streams > 1) {
-		ERROR("Dentry `%"TS"' has multiple (%u) un-named streams",
-		      first_dentry->full_path, num_unnamed_streams);
-		goto out;
-	}
-
-	/* Files cannot have multiple DOS names, even if they have multiple
-	 * names in multiple directories (i.e. hard links).
-	 * Source: NTFS-3g authors. */
-	const 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) {
-				ERROR("Hard-linked file has a DOS name at "
-				      "both `%"TS"' and `%"TS"'",
-				      dentry_with_dos_name->full_path,
-				      dentry->full_path);
-				goto out;
-			}
-			dentry_with_dos_name = dentry;
+	if (lte->refcnt != lte->real_refcnt) {
+		if (wimlib_print_errors) {
+			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);
 		}
+		lte->refcnt = lte->real_refcnt;
+		++*(unsigned long *)ctr;
 	}
-
-	/* 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",
-		      first_dentry->full_path);
-		goto out;
-	}
-
-	inode->i_verified = 1;
-	ret = 0;
-out:
-	return ret;
+	return 0;
 }
 
-/* Run some miscellaneous verifications on a WIM dentry */
-int
-verify_dentry(struct wim_dentry *dentry, void *wim)
+static void
+tally_inode_refcnts(const struct wim_inode *inode,
+		    const struct wim_lookup_table *lookup_table)
 {
-	int ret;
-	WIMStruct *w = wim;
-
-	/* 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);
-		if (ret != 0)
-			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);
-			return WIMLIB_ERR_INVALID_DENTRY;
-		}
-	}
-
-#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);
+	for (unsigned i = 0; i <= inode->i_num_ads; i++) {
+		struct wim_lookup_table_entry *lte;
+		lte = inode_stream_lte(inode, i, lookup_table);
+		if (lte)
+			lte->real_refcnt += inode->i_nlink;
 	}
-#endif
-
-	return 0;
 }
 
-static int
-image_run_full_verifications(WIMStruct *w)
-{
-	struct wim_image_metadata *imd;
-	struct wim_inode *inode;
-	struct hlist_node *cur;
-
-	imd = wim_get_current_image_metadata(w);
-	hlist_for_each_entry(inode, cur, &imd->inode_list, i_hlist)
-		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)
+tally_image_refcnts(WIMStruct *wim)
 {
-	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;
-	}
+	const struct wim_image_metadata *imd;
+	const struct wim_inode *inode;
+
+	imd = wim_get_current_image_metadata(wim);
+	image_for_each_inode(inode, imd)
+		tally_inode_refcnts(inode, wim->lookup_table);
 	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
@@ -209,137 +85,24 @@ lte_fix_refcnt(struct wim_lookup_table_entry *lte, void *ctr)
  * 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)
+wim_recalculate_refcnts(WIMStruct *wim)
 {
+	unsigned long num_ltes_with_bogus_refcnt = 0;
 	int ret;
 
-	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 (int i = 0; i < w->hdr.image_count; i++)
-			w->image_metadata[i].metadata_lte->real_refcnt++;
-		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);
-		}
-	} else {
-		w->all_images_verified = 0;
-	}
-	return ret;
-}
-
-/*
- * verify_swm_set: - Sanity checks to make sure a set of WIMs correctly
- *		     correspond to a spanned set.
- *
- * @w:
- * 	Part 1 of the set.
- *
- * @additional_swms:
- * 	All parts of the set other than part 1.
- *
- * @num_additional_swms:
- * 	Number of WIMStructs in @additional_swms.  Or, the total number of parts
- * 	in the set minus 1.
- *
- * @return:
- * 	0 on success; WIMLIB_ERR_SPLIT_INVALID if the set is not valid.
- */
-int
-verify_swm_set(WIMStruct *w, WIMStruct **additional_swms,
-	       unsigned num_additional_swms)
-{
-	unsigned total_parts = w->hdr.total_parts;
-	int ctype;
-	const u8 *guid;
-
-	if (total_parts != num_additional_swms + 1) {
-		ERROR("`%"TS"' says there are %u parts in the spanned set, "
-		      "but %"TS"%u part%"TS" provided",
-		      w->filename, total_parts,
-		      (num_additional_swms + 1 < total_parts) ? T("only ") : T(""),
-		      num_additional_swms + 1,
-		      (num_additional_swms) ? T("s were") : T(" was"));
-		return WIMLIB_ERR_SPLIT_INVALID;
-	}
-	if (w->hdr.part_number != 1) {
-		ERROR("WIM `%"TS"' is not the first part of the split WIM.",
-		      w->filename);
-		return WIMLIB_ERR_SPLIT_INVALID;
-	}
-	for (unsigned i = 0; i < num_additional_swms; i++) {
-		if (additional_swms[i]->hdr.total_parts != total_parts) {
-			ERROR("WIM `%"TS"' says there are %u parts in the "
-			      "spanned set, but %u parts were provided",
-			      additional_swms[i]->filename,
-			      additional_swms[i]->hdr.total_parts,
-			      total_parts);
-			return WIMLIB_ERR_SPLIT_INVALID;
-		}
-	}
-
-	/* keep track of ctype and guid just to make sure they are the same for
-	 * all the WIMs. */
-	ctype = wimlib_get_compression_type(w);
-	guid = w->hdr.guid;
-
-	{
-		/* parts_to_swms is not allocated at function scope because it
-		 * should only be allocated after num_additional_swms was
-		 * checked to be the same as w->hdr.total_parts.  Otherwise, it
-		 * could be unexpectedly high and cause a stack overflow. */
-		WIMStruct *parts_to_swms[num_additional_swms];
-		ZERO_ARRAY(parts_to_swms);
-		for (unsigned i = 0; i < num_additional_swms; i++) {
-
-			WIMStruct *swm = additional_swms[i];
-
-			if (wimlib_get_compression_type(swm) != ctype) {
-				ERROR("The split WIMs do not all have the same "
-				      "compression type");
-				return WIMLIB_ERR_SPLIT_INVALID;
-			}
-			if (memcmp(guid, swm->hdr.guid, WIM_GID_LEN) != 0) {
-				ERROR("The split WIMs do not all have the same "
-				      "GUID");
-				return WIMLIB_ERR_SPLIT_INVALID;
-			}
-			if (swm->hdr.part_number == 1) {
-				ERROR("WIMs `%"TS"' and `%"TS"' both are marked "
-				      "as the first WIM in the spanned set",
-				      w->filename, swm->filename);
-				return WIMLIB_ERR_SPLIT_INVALID;
-			}
-			if (swm->hdr.part_number == 0 ||
-			    swm->hdr.part_number > total_parts)
-			{
-				ERROR("WIM `%"TS"' says it is part %u in the "
-				      "spanned set, but the part number must "
-				      "be in the range [1, %u]",
-				      swm->filename, swm->hdr.part_number, total_parts);
-				return WIMLIB_ERR_SPLIT_INVALID;
-			}
-			if (parts_to_swms[swm->hdr.part_number - 2])
-			{
-				ERROR("`%"TS"' and `%"TS"' are both marked as "
-				      "part %u of %u in the spanned set",
-				      parts_to_swms[swm->hdr.part_number - 2]->filename,
-				      swm->filename,
-				      swm->hdr.part_number,
-				      total_parts);
-				return WIMLIB_ERR_SPLIT_INVALID;
-			} else {
-				parts_to_swms[swm->hdr.part_number - 2] = swm;
-			}
-		}
-	}
+	for_lookup_table_entry(wim->lookup_table, lte_zero_real_refcnt, NULL);
+	ret = for_image(wim, WIMLIB_ALL_IMAGES, tally_image_refcnts);
+	if (ret)
+		return ret;
+	num_ltes_with_bogus_refcnt = 0;
+	for_lookup_table_entry(wim->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);
+	}
+	wim->refcnts_ok = 1;
 	return 0;
 }