Introduce 'repair_fs_first_inode' to repair first inode errors.
Signed-off-by: Su Yue <suy.f...@cn.fujitsu.com>
---
cmds-check.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 69 insertions(+)
diff --git a/cmds-check.c b/cmds-check.c
index 6dafbd7d..85e87884 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -5506,6 +5506,71 @@ out:
}
/*
+ * Normal INODE_ITEM_MISSING and INODE_REF_MISSING are handled in backref
+ * dir. Root dir should be handled specially because root dir is the root
+ * of fs.
+ *
+ * returns 0 means success
+ * returns <0 means failure
+ */
+static int repair_fs_first_inode(struct btrfs_root *root, int *err_ret)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_key key;
+ struct btrfs_path path;
+ int filetype = BTRFS_FT_DIR;
+ int ret = 0;
+
+ ASSERT(err_ret);
+ btrfs_init_path(&path);
+
+ if (*err_ret & INODE_REF_MISSING) {
+ key.objectid = BTRFS_FIRST_FREE_OBJECTID;
+ key.type = BTRFS_INODE_REF_KEY;
+ key.offset = BTRFS_FIRST_FREE_OBJECTID;
+
+ trans = btrfs_start_transaction(root, 1);
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
+
+ btrfs_release_path(&path);
+ ret = btrfs_search_slot(trans, root, &key, &path, 1, 1);
+ if (ret < 0 || !ret)
+ goto out;
+
+ ret = btrfs_insert_inode_ref(trans, root, "..", strlen(".."),
+ BTRFS_FIRST_FREE_OBJECTID,
+ BTRFS_FIRST_FREE_OBJECTID, 0);
+ if (ret > 0)
+ ret = -ret;
+ if (ret) {
+ error("Failed to insert first inode ref");
+ goto out;
+ }
+ printf("Add INODE_REF[%llu %llu] name %s",
+ BTRFS_FIRST_FREE_OBJECTID, BTRFS_FIRST_FREE_OBJECTID,
+ "..");
+ *err_ret &= ~INODE_REF_MISSING;
+ btrfs_commit_transaction(trans, root);
+ }
+
+ if (*err_ret & INODE_ITEM_MISSING) {
+ ret = repair_inode_item_missing(root,
+ BTRFS_FIRST_FREE_OBJECTID,
+ filetype, *err_ret);
+ if (ret)
+ goto out;
+ *err_ret &= ~INODE_ITEM_MISSING;
+ }
+
+out:
+ if (ret)
+ error("Failed to repair first inode");
+ btrfs_release_path(&path);
+ return ret;
+}
+
+/*
* check first root dir's inode_item, inde_ref
*
* returns 0 means no error
@@ -5560,6 +5625,10 @@ static int check_fs_first_inode(struct btrfs_root *root,
unsigned int ext_ref)
out:
btrfs_release_path(&path);
+
+ if (err && repair)
+ repair_fs_first_inode(root, &err);
+
if (err & (INODE_ITEM_MISSING | INODE_ITEM_MISMATCH))
error("root dir INODE_ITEM is %s",
err & INODE_ITEM_MISMATCH ? "mismatch" : "missing");
--
2.11.1
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