+/* Removes open file descriptors from a lookup table entry @old_lte where the
+ * file descriptors have opened the corresponding file resource in the context
+ * of the hard link group @link_group; these file descriptors are extracted and
+ * placed in a new lookup table entry, which is returned. */
+static struct lookup_table_entry *
+lte_extract_fds(struct lookup_table_entry *old_lte, u64 link_group)
+{
+ int ret;
+ u16 num_transferred_fds;
+ struct lookup_table_entry *new_lte;
+
+ new_lte = new_lookup_table_entry();
+ if (!new_lte)
+ return NULL;
+
+ num_transferred_fds = 0;
+ for (u16 i = 0; i < old_lte->num_allocated_fds; i++)
+ if (old_lte->fds[i] &&
+ old_lte->fds[i]->dentry->hard_link == link_group)
+ num_transferred_fds++;
+ DEBUG("Transferring %u file descriptors",
+ num_transferred_fds);
+ new_lte->fds = MALLOC(num_transferred_fds * sizeof(new_lte->fds[0]));
+ if (!new_lte->fds) {
+ FREE(new_lte);
+ return NULL;
+ }
+ for (u16 i = 0, j = 0; ; i++) {
+ if (old_lte->fds[i] &&
+ old_lte->fds[i]->dentry->hard_link == link_group) {
+ struct wimlib_fd *fd = old_lte->fds[i];
+ old_lte->fds[i] = NULL;
+ fd->lte = new_lte;
+ fd->idx = j;
+ new_lte->fds[j] = fd;
+ if (++j == num_transferred_fds)
+ break;
+ }
+ }
+ old_lte->num_opened_fds -= num_transferred_fds;
+ new_lte->num_opened_fds = num_transferred_fds;
+ new_lte->num_allocated_fds = num_transferred_fds;
+ return new_lte;
+}
+
+/*
+ * Transfers an alternate data stream entry to a new lookup table entry
+ */
+static void lte_transfer_ads_entry(struct lookup_table_entry *new_lte,
+ struct ads_entry *ads_entry)
+{
+ list_del(&ads_entry->lte_group_list.list);
+ list_add(&ads_entry->lte_group_list.list, &new_lte->lte_group_list);
+ ads_entry->lte = new_lte;
+}
+
+/*
+ * Transfers a dentry to a new lookup table entry
+ */
+static void lte_transfer_dentry(struct lookup_table_entry *new_lte,
+ struct dentry *dentry)
+{
+ list_del(&dentry->lte_group_list.list);
+ list_add(&dentry->lte_group_list.list, &new_lte->lte_group_list);
+ dentry->lte = new_lte;
+}
+
+static void lte_transfer_stream_entries(struct lookup_table_entry *new_lte,
+ struct dentry *dentry,
+ unsigned stream_idx)
+{
+ INIT_LIST_HEAD(&new_lte->lte_group_list);
+ if (stream_idx == 0) {
+ struct list_head *pos;
+ do {
+ struct dentry *d;
+ d = container_of(pos, struct dentry, link_group_list);
+ lte_transfer_dentry(new_lte, d);
+
+ pos = pos->next;
+ } while (pos != &dentry->link_group_list);
+ } else {
+ struct ads_entry *ads_entry;
+ ads_entry = &dentry->ads_entries[stream_idx - 1];
+ lte_transfer_ads_entry(new_lte, ads_entry);
+ }
+}
+
+#if 0
+/*
+ * Transfers streams part of a hard-link group from @old_lte to @new_lte.
+ *
+ * @dentry is one of the dentries in the hard link group
+ * @stream_idx is the index of the stream that we're transferring.
+ */
+static void lte_transfer_stream_entries(struct lookup_table_entry *old_lte,
+ struct lookup_table_entry *new_lte,
+ struct dentry *dentry, unsigned stream_idx)
+{
+ INIT_LIST_HEAD(&new_lte->lte_group_list);
+
+ if (stream_idx == 0) {
+ struct list_head *pos;
+ struct stream_list_head *head;
+ struct dentry *other_dentry;
+ list_for_each(pos, &old_lte->lte_group_list) {
+ head = container_of(pos, struct stream_list_head, head);
+ if (head->type != STREAM_TYPE_NORMAL) {
+ continue;
+ other_dentry = container_of(head, struct dentry,
+ lte_group_list);
+ if (other_dentry->hard_link != dentry->link_group)
+ continue;
+
+ list_del(&other_dentry->lte_group_list.list);
+ list_add(&other_dentry->lte_group_list.list,
+ &new_lte->lte_group_list);
+ other_dentry->lte = new_lte;
+ }
+ } else {
+ /* ADS entries are shared within a hard link group. */
+ lte_load_ads_entry(new_lte, &dentry->ads_entries[stream_idx - 1]);
+ }
+}
+static void lte__stream_entries(struct lookup_table_entry *new_lte,
+ struct dentry *dentry, unsigned stream_idx)
+{
+ INIT_LIST_HEAD(new_lte->lte_group_list);
+ if (stream_idx == 0) {
+ struct list_head *cur;
+ do {
+ struct dentry *d;
+
+ d = container_of(cur, struct dentry, link_group_list);
+ list_del(&d->lte_group_list);
+ list_add(&d->lte_group_list, &new_lte->lte_group_list);
+ d->lte = new_lte;
+ cur = cur->next;
+ } while (cur != &dentry->link_group_list);
+ } else {
+ lte_load_ads_entry(new_lte, &dentry->ads_entries[stream_idx - 1]);
+ }
+}
+#endif
+
+
git://wimlib.net / wimlib / commitdiff