]> wimlib.net Git - wimlib/blobdiff - src/ntfs-capture.c
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[wimlib] / src / ntfs-capture.c
index 8d1fe0e6409023cb4386c7dbbb0558f844eaa231..eadedac725a5efc33872a76855ddb5904852b4b0 100644 (file)
@@ -63,15 +63,19 @@ struct sd_node {
        struct sd_node *right;
 };
 
-/* Frees a security descriptor index tree. */
-static void free_sd_set(struct sd_node *root)
+static void free_sd_tree(struct sd_node *root)
 {
        if (root) {
-               free_sd_set(root->left);
-               free_sd_set(root->right);
+               free_sd_tree(root->left);
+               free_sd_tree(root->right);
                FREE(root);
        }
 }
+/* Frees a security descriptor index set. */
+static void destroy_sd_set(struct sd_set *sd_set)
+{
+       free_sd_tree(sd_set->root);
+}
 
 /* Inserts a a new node into the security descriptor index tree. */
 static void insert_sd_node(struct sd_node *new, struct sd_node *root)
@@ -117,7 +121,7 @@ static int lookup_sd(const u8 hash[SHA1_HASH_SIZE], struct sd_node *root)
  * the security ID for it.  If a new security descriptor cannot be allocated,
  * return -1.
  */
-static int sd_set_add_sd(struct sd_set *sd_set, const u8 *descriptor,
+static int sd_set_add_sd(struct sd_set *sd_set, const char descriptor[],
                         size_t size)
 {
        u8 hash[SHA1_HASH_SIZE];
@@ -128,7 +132,7 @@ static int sd_set_add_sd(struct sd_set *sd_set, const u8 *descriptor,
        u8 *descr_copy;
        struct wim_security_data *sd;
 
-       sha1_buffer(descriptor, size, hash);
+       sha1_buffer((const u8*)descriptor, size, hash);
        security_id = lookup_sd(hash, sd_set->root);
        if (security_id >= 0)
                return security_id;
@@ -162,6 +166,7 @@ static int sd_set_add_sd(struct sd_set *sd_set, const u8 *descriptor,
        sd->descriptors[sd->num_entries] = descr_copy;
        sd->sizes[sd->num_entries] = size;
        sd->num_entries++;
+       DEBUG("There are now %d security descriptors", sd->num_entries);
        sd->total_length += size + sizeof(sd->sizes[0]);
 
        if (sd_set->root)
@@ -238,7 +243,7 @@ static int capture_ntfs_streams(struct dentry *dentry, ntfs_inode *ni,
 
        ntfs_attr_search_ctx *actx;
        u8 attr_hash[SHA1_HASH_SIZE];
-       struct ntfs_location *ntfs_loc;
+       struct ntfs_location *ntfs_loc = NULL;
        struct lookup_table_entry *lte;
        int ret = 0;
 
@@ -247,7 +252,7 @@ static int capture_ntfs_streams(struct dentry *dentry, ntfs_inode *ni,
        /* Get context to search the streams of the NTFS file. */
        actx = ntfs_attr_get_search_ctx(ni, NULL);
        if (!actx) {
-               ERROR_WITH_ERRNO("Cannot get attribute search "
+               ERROR_WITH_ERRNO("Cannot get NTFS attribute search "
                                 "context");
                return WIMLIB_ERR_NTFS_3G;
        }
@@ -271,8 +276,6 @@ static int capture_ntfs_streams(struct dentry *dentry, ntfs_inode *ni,
                if (lte) {
                        lte->refcnt++;
                } else {
-                       struct ntfs_location *ntfs_loc;
-
                        ntfs_loc = CALLOC(1, sizeof(*ntfs_loc));
                        if (!ntfs_loc)
                                goto out_put_actx;
@@ -297,6 +300,9 @@ static int capture_ntfs_streams(struct dentry *dentry, ntfs_inode *ni,
                        lte->resource_location = RESOURCE_IN_NTFS_VOLUME;
                        lte->resource_entry.original_size = actx->attr->data_size;
                        lte->resource_entry.size = actx->attr->data_size;
+                       DEBUG("Add resource for `%s' (size = %zu)",
+                               dentry->file_name_utf8,
+                               lte->resource_entry.original_size);
                        copy_hash(lte->hash, attr_hash);
                        lookup_table_insert(lookup_table, lte);
                }
@@ -310,9 +316,10 @@ static int capture_ntfs_streams(struct dentry *dentry, ntfs_inode *ni,
                        dentry->lte = lte;
                } else {
                        struct ads_entry *new_ads_entry;
-                       stream_name_utf8 = utf16_to_utf8((const u8*)attr_record_name(actx->attr),
+                       size_t stream_name_utf8_len;
+                       stream_name_utf8 = utf16_to_utf8((const char*)attr_record_name(actx->attr),
                                                         actx->attr->name_length,
-                                                        &stream_name_utf16_len);
+                                                        &stream_name_utf8_len);
                        if (!stream_name_utf8)
                                goto out_free_lte;
                        new_ads_entry = dentry_add_ads(dentry, stream_name_utf8);
@@ -353,13 +360,13 @@ struct readdir_ctx {
        ntfs_volume        **ntfs_vol_p;
 };
 
-static int __build_dentry_tree_ntfs(struct dentry **root_p, ntfs_inode *ni,
-                                   char path[], size_t path_len,
-                                   struct lookup_table *lookup_table,
-                                   struct sd_set *sd_set,
-                                   const struct capture_config *config,
-                                   ntfs_volume **ntfs_vol_p);
-
+static int
+build_dentry_tree_ntfs_recursive(struct dentry **root_p, ntfs_inode *ni,
+                                char path[], size_t path_len,
+                                struct lookup_table *lookup_table,
+                                struct sd_set *sd_set,
+                                const struct capture_config *config,
+                                ntfs_volume **ntfs_vol_p);
 
 static int wim_ntfs_capture_filldir(void *dirent, const ntfschar *name,
                                    const int name_len, const int name_type,
@@ -369,13 +376,16 @@ static int wim_ntfs_capture_filldir(void *dirent, const ntfschar *name,
        struct readdir_ctx *ctx;
        size_t utf8_name_len;
        char *utf8_name;
-       struct dentry *child;
+       struct dentry *child = NULL;
        int ret;
        size_t path_len;
 
+       if (name_type == FILE_NAME_DOS)
+               return 0;
+
        ret = -1;
 
-       utf8_name = utf16_to_utf8((const u8*)name, name_len * 2,
+       utf8_name = utf16_to_utf8((const char*)name, name_len * 2,
                                  &utf8_name_len);
        if (!utf8_name)
                goto out;
@@ -402,15 +412,15 @@ static int wim_ntfs_capture_filldir(void *dirent, const ntfschar *name,
                ctx->path[path_len++] = '/';
        memcpy(ctx->path + path_len, utf8_name, utf8_name_len + 1);
        path_len += utf8_name_len;
-       ret = __build_dentry_tree_ntfs(&child, ni, ctx->path, path_len,
-                                      ctx->lookup_table, ctx->sd_set,
-                                      ctx->config, ctx->ntfs_vol_p);
-       DEBUG("Linking dentry `%s' with parent `%s'",
-             child->file_name_utf8, ctx->parent->file_name_utf8);
-
-       link_dentry(child, ctx->parent);
-       DEBUG("Return %d", ret);
-out_close_ni:
+       ret = build_dentry_tree_ntfs_recursive(&child, ni, ctx->path, path_len,
+                                              ctx->lookup_table, ctx->sd_set,
+                                              ctx->config, ctx->ntfs_vol_p);
+
+       if (child) {
+               DEBUG("Linking dentry `%s' with parent `%s'",
+                     child->file_name_utf8, ctx->parent->file_name_utf8);
+               link_dentry(child, ctx->parent);
+       }
        ntfs_inode_close(ni);
 out_free_utf8_name:
        FREE(utf8_name);
@@ -422,20 +432,22 @@ out:
  * At the same time, update the WIM lookup table with lookup table entries for
  * the NTFS streams, and build an array of security descriptors.
  */
-static int __build_dentry_tree_ntfs(struct dentry **root_p, ntfs_inode *ni,
-                                   char path[], size_t path_len,
-                                   struct lookup_table *lookup_table,
-                                   struct sd_set *sd_set,
-                                   const struct capture_config *config,
-                                   ntfs_volume **ntfs_vol_p)
+static int build_dentry_tree_ntfs_recursive(struct dentry **root_p,
+                                           ntfs_inode *ni,
+                                           char path[],
+                                           size_t path_len,
+                                           struct lookup_table *lookup_table,
+                                           struct sd_set *sd_set,
+                                           const struct capture_config *config,
+                                           ntfs_volume **ntfs_vol_p)
 {
        u32 attributes;
        int mrec_flags;
-       u32 sd_size;
+       u32 sd_size = 0;
        int ret = 0;
        struct dentry *root;
 
-       if (exclude_path(path, config)) {
+       if (exclude_path(path, config, false)) {
                DEBUG("Excluding `%s' from capture", path);
                return 0;
        }
@@ -448,13 +460,13 @@ static int __build_dentry_tree_ntfs(struct dentry **root_p, ntfs_inode *ni,
        if (!root)
                return WIMLIB_ERR_NOMEM;
 
+       *root_p = root;
        root->creation_time    = le64_to_cpu(ni->creation_time);
        root->last_write_time  = le64_to_cpu(ni->last_data_change_time);
        root->last_access_time = le64_to_cpu(ni->last_access_time);
-       root->security_id      = le32_to_cpu(ni->security_id);
        root->attributes       = le32_to_cpu(attributes);
-       root->hard_link  = ni->mft_no;
-       root->resolved = true;
+       root->link_group_id    = ni->mft_no;
+       root->resolved         = true;
 
        if (attributes & FILE_ATTR_REPARSE_POINT) {
                DEBUG("Reparse point `%s'", path);
@@ -478,8 +490,10 @@ static int __build_dentry_tree_ntfs(struct dentry **root_p, ntfs_inode *ni,
                        .ntfs_vol_p   = ntfs_vol_p,
                };
                ret = ntfs_readdir(ni, &pos, &ctx, wim_ntfs_capture_filldir);
-               if (ret != 0)
+               if (ret != 0) {
+                       ERROR_WITH_ERRNO("ntfs_readdir()");
                        ret = WIMLIB_ERR_NTFS_3G;
+               }
        } else {
                DEBUG("Normal file `%s'", path);
                /* Normal file */
@@ -490,14 +504,13 @@ static int __build_dentry_tree_ntfs(struct dentry **root_p, ntfs_inode *ni,
        if (ret != 0)
                return ret;
 
-       DEBUG("Getting security information from `%s'", path);
        ret = ntfs_inode_get_security(ni,
                                      OWNER_SECURITY_INFORMATION |
                                      GROUP_SECURITY_INFORMATION |
                                      DACL_SECURITY_INFORMATION  |
                                      SACL_SECURITY_INFORMATION,
                                      NULL, 0, &sd_size);
-       u8 sd[sd_size];
+       char sd[sd_size];
        ret = ntfs_inode_get_security(ni,
                                      OWNER_SECURITY_INFORMATION |
                                      GROUP_SECURITY_INFORMATION |
@@ -512,6 +525,10 @@ static int __build_dentry_tree_ntfs(struct dentry **root_p, ntfs_inode *ni,
                if (ret > 0) {
                        /*print_security_descriptor(sd, sd_size);*/
                        root->security_id = sd_set_add_sd(sd_set, sd, sd_size);
+                       if (root->security_id == -1) {
+                               ERROR("Out of memory");
+                               return WIMLIB_ERR_NOMEM;
+                       }
                        DEBUG("Added security ID = %u for `%s'",
                              root->security_id, path);
                } else { 
@@ -520,7 +537,6 @@ static int __build_dentry_tree_ntfs(struct dentry **root_p, ntfs_inode *ni,
                }
                ret = 0;
        }
-       *root_p = root;
        return ret;
 }
 
@@ -535,9 +551,10 @@ static int build_dentry_tree_ntfs(struct dentry **root_p,
        ntfs_volume *vol;
        ntfs_inode *root_ni;
        int ret = 0;
-       struct sd_set tree;
-       tree.sd = sd;
-       tree.root = NULL;
+       struct sd_set sd_set = {
+               .sd = sd,
+               .root = NULL,
+       };
        ntfs_volume **ntfs_vol_p = extra_arg;
 
        DEBUG("Mounting NTFS volume `%s' read-only", device);
@@ -549,6 +566,9 @@ static int build_dentry_tree_ntfs(struct dentry **root_p,
                return WIMLIB_ERR_NTFS_3G;
        }
 
+       /* We don't want to capture the special NTFS files such as $Bitmap.  Not
+        * to be confused with "hidden" or "system" files which are real files
+        * that we do need to capture.  */
        NVolClearShowSysFiles(vol);
 
        DEBUG("Opening root NTFS dentry");
@@ -559,19 +579,37 @@ static int build_dentry_tree_ntfs(struct dentry **root_p,
                ret = WIMLIB_ERR_NTFS_3G;
                goto out;
        }
-       char path[4096];
+
+       /* Currently we assume that all the UTF-8 paths fit into this length and
+        * there is no check for overflow. */
+       char *path = MALLOC(32768);
+       if (!path) {
+               ERROR("Could not allocate memory for NTFS pathname");
+               goto out_cleanup;
+       }
+
        path[0] = '/';
        path[1] = '\0';
-       ret = __build_dentry_tree_ntfs(root_p, root_ni, path, 1,
-                                      lookup_table, &tree, config,
-                                      ntfs_vol_p);
+       ret = build_dentry_tree_ntfs_recursive(root_p, root_ni, path, 1,
+                                              lookup_table, &sd_set,
+                                              config, ntfs_vol_p);
+out_cleanup:
+       FREE(path);
        ntfs_inode_close(root_ni);
+       destroy_sd_set(&sd_set);
 
 out:
-       if (ntfs_umount(vol, FALSE) != 0) {
-               ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'", device);
-               if (ret == 0)
-                       ret = WIMLIB_ERR_NTFS_3G;
+       if (ret) {
+               if (ntfs_umount(vol, FALSE) != 0) {
+                       ERROR_WITH_ERRNO("Failed to unmount NTFS volume `%s'",
+                                        device);
+                       if (ret == 0)
+                               ret = WIMLIB_ERR_NTFS_3G;
+               }
+       } else {
+               /* We need to leave the NTFS volume mounted so that we can read
+                * the NTFS files again when we are actually writing the WIM */
+               *ntfs_vol_p = vol;
        }
        return ret;
 }
@@ -581,8 +619,6 @@ out:
 WIMLIBAPI int wimlib_add_image_from_ntfs_volume(WIMStruct *w,
                                                const char *device,
                                                const char *name,
-                                               const char *description,
-                                               const char *flags_element,
                                                const char *config_str,
                                                size_t config_len,
                                                int flags)
@@ -591,20 +627,17 @@ WIMLIBAPI int wimlib_add_image_from_ntfs_volume(WIMStruct *w,
                ERROR("Cannot dereference files when capturing directly from NTFS");
                return WIMLIB_ERR_INVALID_PARAM;
        }
-       return do_add_image(w, device, name, description, flags_element,
-                           config_str, config_len, flags, build_dentry_tree_ntfs,
-                           &w->ntfs_vol);
+       return do_add_image(w, device, name, config_str, config_len, flags,
+                           build_dentry_tree_ntfs, &w->ntfs_vol);
 }
 
 #else /* WITH_NTFS_3G */
 WIMLIBAPI int wimlib_add_image_from_ntfs_volume(WIMStruct *w,
                                                const char *device,
                                                const char *name,
-                                               const char *description,
-                                               const char *flags_element,
-                                               int flags,
                                                const char *config_str,
-                                               size_t config_len)
+                                               size_t config_len,
+                                               int flags)
 {
        ERROR("wimlib was compiled without support for NTFS-3g, so");
        ERROR("we cannot capture a WIM image directly from a NTFS volume");