X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fmetadata_resource.c;h=9cebf9ebc0c1be10daa386aa0fbd16c4565d6f9c;hp=4f8be14161845874f757203700c5a4084e1251c4;hb=87836fae536b056cde1e84904a63ace9f8b7f707;hpb=c6e063fcb2b1ffa76df62ab902a38bf5f604d2e2 diff --git a/src/metadata_resource.c b/src/metadata_resource.c index 4f8be141..9cebf9eb 100644 --- a/src/metadata_resource.c +++ b/src/metadata_resource.c @@ -3,7 +3,7 @@ */ /* - * Copyright (C) 2012 Eric Biggers + * Copyright (C) 2012, 2013 Eric Biggers * * This file is part of wimlib, a library for working with WIM files. * @@ -42,22 +42,23 @@ * * @return: Zero on success, nonzero on failure. */ -int read_metadata_resource(WIMStruct *w, struct image_metadata *imd) +int +read_metadata_resource(WIMStruct *w, struct wim_image_metadata *imd) { u8 *buf; u32 dentry_offset; int ret; - struct dentry *dentry; - struct inode_table inode_tab; - const struct lookup_table_entry *metadata_lte; + struct wim_dentry *dentry; + const struct wim_lookup_table_entry *metadata_lte; u64 metadata_len; - struct hlist_head inode_list; metadata_lte = imd->metadata_lte; metadata_len = wim_resource_size(metadata_lte); - DEBUG("Reading metadata resource: length = %"PRIu64", " - "offset = %"PRIu64"", metadata_len, + DEBUG("Reading metadata resource: original_size = %"PRIu64", " + "size = %"PRIu64", offset = %"PRIu64"", + metadata_lte->resource_entry.original_size, + metadata_lte->resource_entry.size, metadata_lte->resource_entry.offset); /* There is no way the metadata resource could possibly be less than (8 @@ -86,8 +87,8 @@ int read_metadata_resource(WIMStruct *w, struct image_metadata *imd) } /* Read the metadata resource into memory. (It may be compressed.) */ - ret = read_full_wim_resource(metadata_lte, buf, 0); - if (ret != 0) + ret = read_full_resource_into_buf(metadata_lte, buf, false); + if (ret) goto out_free_buf; DEBUG("Finished reading metadata resource into memory."); @@ -105,7 +106,7 @@ int read_metadata_resource(WIMStruct *w, struct image_metadata *imd) wimlib_assert(imd->security_data == NULL); ret = read_security_data(buf, metadata_len, &imd->security_data); - if (ret != 0) + if (ret) goto out_free_buf; dentry_offset = (imd->security_data->total_length + 7) & ~7; @@ -119,10 +120,10 @@ int read_metadata_resource(WIMStruct *w, struct image_metadata *imd) DEBUG("Reading root dentry"); /* Allocate memory for the root dentry and read it into memory */ - dentry = MALLOC(sizeof(struct dentry)); + dentry = MALLOC(sizeof(struct wim_dentry)); if (!dentry) { ERROR("Failed to allocate %zu bytes for root dentry", - sizeof(struct dentry)); + sizeof(struct wim_dentry)); ret = WIMLIB_ERR_NOMEM; goto out_free_security_data; } @@ -147,41 +148,26 @@ int read_metadata_resource(WIMStruct *w, struct image_metadata *imd) /* Now read the entire directory entry tree into memory. */ DEBUG("Reading dentry tree"); ret = read_dentry_tree(buf, metadata_len, dentry); - if (ret != 0) - goto out_free_dentry_tree; - - /* Calculate the full paths in the dentry tree. */ - DEBUG("Calculating dentry full paths"); - ret = for_dentry_in_tree(dentry, calculate_dentry_full_path, NULL); - if (ret != 0) + if (ret) goto out_free_dentry_tree; /* Build hash table that maps hard link group IDs to dentry sets */ - DEBUG("Building link group table"); - ret = init_inode_table(&inode_tab, 9001); - if (ret != 0) - goto out_free_dentry_tree; - - for_dentry_in_tree(dentry, inode_table_insert, &inode_tab); - - DEBUG("Fixing inconsistencies in the hard link groups"); - ret = fix_inodes(&inode_tab, &inode_list); - destroy_inode_table(&inode_tab); - if (ret != 0) + ret = dentry_tree_fix_inodes(dentry, &imd->inode_list); + if (ret) goto out_free_dentry_tree; if (!w->all_images_verified) { DEBUG("Running miscellaneous verifications on the dentry tree"); for_lookup_table_entry(w->lookup_table, lte_zero_real_refcnt, NULL); ret = for_dentry_in_tree(dentry, verify_dentry, w); - if (ret != 0) + if (ret) goto out_free_dentry_tree; } DEBUG("Done reading image metadata"); imd->root_dentry = dentry; - imd->inode_list = inode_list; + INIT_LIST_HEAD(&imd->unhashed_streams); goto out_free_buf; out_free_dentry_tree: free_dentry_tree(dentry, NULL); @@ -193,7 +179,8 @@ out_free_buf: return ret; } -static void recalculate_security_data_length(struct wim_security_data *sd) +static void +recalculate_security_data_length(struct wim_security_data *sd) { u32 total_length = sizeof(u64) * sd->num_entries + 2 * sizeof(u32); for (u32 i = 0; i < sd->num_entries; i++) @@ -204,45 +191,47 @@ static void recalculate_security_data_length(struct wim_security_data *sd) /* Like write_wim_resource(), but the resource is specified by a buffer of * uncompressed data rather a lookup table entry; also writes the SHA1 hash of * the buffer to @hash. */ -static int write_wim_resource_from_buffer(const u8 *buf, u64 buf_size, - FILE *out_fp, int out_ctype, - struct resource_entry *out_res_entry, - u8 hash[SHA1_HASH_SIZE]) +static int +write_wim_resource_from_buffer(const void *buf, u64 buf_size, + FILE *out_fp, int out_ctype, + struct resource_entry *out_res_entry, + u8 hash[SHA1_HASH_SIZE]) { /* Set up a temporary lookup table entry to provide to * write_wim_resource(). */ - struct lookup_table_entry lte; + struct wim_lookup_table_entry lte; int ret; - lte.resource_entry.flags = 0; - lte.resource_entry.original_size = buf_size; - lte.resource_entry.size = buf_size; - lte.resource_entry.offset = 0; lte.resource_location = RESOURCE_IN_ATTACHED_BUFFER; - lte.attached_buffer = (u8*)buf; - - zero_out_hash(lte.hash); + lte.attached_buffer = (void*)buf; + lte.resource_entry.original_size = buf_size; + lte.resource_entry.flags = 0; + lte.unhashed = 1; ret = write_wim_resource(<e, out_fp, out_ctype, out_res_entry, 0); - if (ret != 0) - return ret; - copy_hash(hash, lte.hash); - return 0; + if (ret == 0) + copy_hash(hash, lte.hash); + return ret; } /* Write the metadata resource for the current WIM image. */ -int write_metadata_resource(WIMStruct *w) +int +write_metadata_resource(WIMStruct *w) { u8 *buf; u8 *p; int ret; u64 subdir_offset; - struct dentry *root; - struct lookup_table_entry *lte; + struct wim_dentry *root; + struct wim_lookup_table_entry *lte; u64 metadata_original_size; struct wim_security_data *sd; + wimlib_assert(w->out_fp != NULL); + wimlib_assert(w->current_image != WIMLIB_NO_IMAGE); + DEBUG("Writing metadata resource for image %d (offset = %"PRIu64")", w->current_image, ftello(w->out_fp)); + root = wim_root_dentry(w); sd = wim_security_data(w); @@ -283,7 +272,7 @@ int write_metadata_resource(WIMStruct *w) /* Get the lookup table entry for the metadata resource so we can update * it. */ - lte = w->image_metadata[w->current_image - 1].metadata_lte; + lte = wim_get_current_image_metadata(w)->metadata_lte; /* Write the metadata resource to the output WIM using the proper * compression type. The lookup table entry for the metadata resource @@ -293,27 +282,11 @@ int write_metadata_resource(WIMStruct *w) wimlib_get_compression_type(w), <e->output_resource_entry, lte->hash); - if (ret != 0) - goto out; + /* Note that although the SHA1 message digest of the metadata resource + * is very likely to have changed, the corresponding lookup table entry + * is not actually located in the hash table, so it need not be + * re-inserted in the hash table. */ - /* It's very likely the SHA1 message digest of the metadata resource - * changed, so re-insert the lookup table entry into the lookup table. - * - * We do not check for other lookup table entries having the same SHA1 - * message digest. It's possible for 2 absolutely identical images to - * be added, therefore causing 2 identical metadata resources to be in - * the WIM. However, in this case, it's expected for 2 separate lookup - * table entries to be created, even though this doesn't make a whole - * lot of sense since they will share the same SHA1 message digest. - * */ - lookup_table_unlink(w->lookup_table, lte); - lookup_table_insert(w->lookup_table, lte); - lte->out_refcnt = 1; - - /* Make sure that the lookup table entry for this metadata resource is - * marked with the metadata flag. */ - lte->output_resource_entry.flags |= WIM_RESHDR_FLAG_METADATA; -out: /* All the data has been written to the new WIM; no need for the buffer * anymore */ FREE(buf);