1 files changed, 108 insertions, 0 deletions

diff --git a/ubifs-utils/fsck.ubifs/handle_disconnected.c b/ubifs-utils/fsck.ubifs/handle_disconnected.c
index b9a380f..be62522 100644
--- a/ubifs-utils/fsck.ubifs/handle_disconnected.c
+++ b/ubifs-utils/fsck.ubifs/handle_disconnected.c
@@ -19,6 +19,7 @@
 #include "fsck.ubifs.h"
 
 #define LOST_FOUND_DIR_NAME "lost+found"
+#define MAX_REPEAT_NAME_RETRY_TIMES 10000000
 
 /**
  * check_and_create_lost_found - Check and create the lost+found directory.
@@ -87,3 +88,110 @@ free_root:
 	kfree(root_ui);
 	return err;
 }
+
+static int handle_disonnected_file(struct ubifs_info *c,
+				   struct scanned_file *file)
+{
+	int err = 0;
+
+	if (FSCK(c)->lost_and_found) {
+		unsigned int index = 0;
+		char file_name[UBIFS_MAX_NLEN + 1];
+		struct fscrypt_name nm;
+		struct ubifs_inode *ui = NULL, *lost_found_ui = NULL;
+
+		lost_found_ui = ubifs_lookup_by_inum(c, FSCK(c)->lost_and_found);
+		if (IS_ERR(lost_found_ui)) {
+			err = PTR_ERR(lost_found_ui);
+			ubifs_assert(c, err != -ENOENT);
+			return err;
+		}
+		ui = ubifs_lookup_by_inum(c, file->inum);
+		if (IS_ERR(ui)) {
+			err = PTR_ERR(ui);
+			ubifs_assert(c, err != -ENOENT);
+			goto free_lost_found_ui;
+		}
+
+		while (index < MAX_REPEAT_NAME_RETRY_TIMES) {
+			struct ubifs_inode *target_ui;
+
+			err = snprintf(file_name, sizeof(file_name),
+				       "INO_%lu_%u", file->inum, index);
+			if (err < 0)
+				goto free_ui;
+			fname_name(&nm) = file_name;
+			fname_len(&nm) = strlen(file_name);
+			target_ui = ubifs_lookup(c, lost_found_ui, &nm);
+			if (IS_ERR(target_ui)) {
+				err = PTR_ERR(target_ui);
+				if (err == -ENOENT)
+					break;
+				goto free_ui;
+			}
+			kfree(target_ui);
+			index++;
+		}
+
+		if (err != -ENOENT) {
+			err = 0;
+			kfree(ui);
+			kfree(lost_found_ui);
+			log_out(c, "Too many duplicated names(%u) in lost+found for inum %lu",
+				index, file->inum);
+			goto delete_file;
+		}
+
+		/* Try to recover disconnected file into lost+found. */
+		err = ubifs_link_recovery(c, lost_found_ui, ui, &nm);
+		if (err && err == -ENOSPC) {
+			err = 0;
+			log_out(c, "No free space to recover disconnected file");
+			goto delete_file;
+		}
+		dbg_fsck("recover disconnected file %lu, in %s",
+			 file->inum, c->dev_name);
+
+free_ui:
+		kfree(ui);
+free_lost_found_ui:
+		kfree(lost_found_ui);
+		return err;
+	}
+
+	log_out(c, "No valid lost+found");
+
+delete_file:
+	if (fix_problem(c, DISCONNECTED_FILE_CANNOT_BE_RECOVERED, file))
+		err = delete_file(c, file);
+	return err;
+}
+
+/**
+ * handle_disonnected_files - Handle disconnected files.
+ * @c: UBIFS file-system description object
+ *
+ * This function tries to recover disonnected files into lost+found directory.
+ * If there is no free space left to recover the disconnected files, fsck may
+ * delete the files to make filesystem be consistent. Returns zero in case of
+ * success, a negative error code in case of failure.
+ */
+int handle_disonnected_files(struct ubifs_info *c)
+{
+	int err, ret = 0;
+	struct scanned_file *file;
+
+	while (!list_empty(&FSCK(c)->disconnected_files)) {
+		file = list_entry(FSCK(c)->disconnected_files.next,
+				  struct scanned_file, list);
+
+		list_del(&file->list);
+		err = handle_disonnected_file(c, file);
+		if (err)
+			ret = ret ? ret : err;
+		destroy_file_content(c, file);
+		kfree(file);
+	}
+
+	return ret;
+}