From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Nieder Subject: [PATCH 19/19] ref_transaction_commit: bail out on failure to remove a ref Date: Wed, 10 Sep 2014 20:12:38 -0700 Message-ID: <20140911031238.GW18279@google.com> References: <20140820231723.GF20185@google.com> <20140911030318.GD18279@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: "git@vger.kernel.org" , Michael Haggerty To: Ronnie Sahlberg X-From: git-owner@vger.kernel.org Thu Sep 11 05:12:50 2014 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1XRuoT-0004EZ-34 for gcvg-git-2@plane.gmane.org; Thu, 11 Sep 2014 05:12:49 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753354AbaIKDMn (ORCPT ); Wed, 10 Sep 2014 23:12:43 -0400 Received: from mail-pa0-f54.google.com ([209.85.220.54]:60644 "EHLO mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753341AbaIKDMm (ORCPT ); Wed, 10 Sep 2014 23:12:42 -0400 Received: by mail-pa0-f54.google.com with SMTP id lj1so9778403pab.41 for ; Wed, 10 Sep 2014 20:12:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:cc:subject:message-id:references:mime-version :content-type:content-disposition:in-reply-to:user-agent; bh=5UrvA1A0qWynWQ+o8qEmEr3hJ3cy0e/eQRSAOCfEID8=; b=Xj/bQI8j7ButSqdOgjakCd4DTA7AFZj/7TJJz+O5KNIUMyCYM6dDJNwIjHsrXlBpz+ XZruLZ7QieCxsgFWlS/daNE0huUX4T2NT7IvfoMn4VlUSqbX0L94TeGi8xsjnjpsdMpU mSeqhOteslq64h5IesEWSkHYrwxcQOgvRDED1i2D3RH+pdWFZ/9lis3L57VjoGuXSxzT JOK+hE+BHU7RIt9V2KIyv+WveEpPLnxJ8b/bFPceIjhMIGyZ700QXZcTaFzdwf5y35tV MxdsIdJST3ouzqAIQu/t1squw2C5AonJJZQD6DLUN3H6DrIPGafIFwNCcCnhqmHUXY0f Zyug== X-Received: by 10.68.209.169 with SMTP id mn9mr42747503pbc.37.1410405161513; Wed, 10 Sep 2014 20:12:41 -0700 (PDT) Received: from google.com (aiede.mtv.corp.google.com [172.27.69.120]) by mx.google.com with ESMTPSA id zr6sm15753267pbc.50.2014.09.10.20.12.40 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Wed, 10 Sep 2014 20:12:40 -0700 (PDT) Content-Disposition: inline In-Reply-To: <20140911030318.GD18279@google.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: When removal of a loose or packed ref fails, bail out instead of trying to finish the transaction. This way, a single error message can be printed (instead of multiple messages being concatenated by mistake) and the operator can try to solve the underlying problem before there is a chance to muck things up even more. In particular, when git fails to remove a ref, git goes on to try to delete the reflog. Exiting early lets us keep the reflog. When git succeeds in deleting a ref A and fails to remove a ref B, it goes on to try to delete both reflogs. It would be better to just remove the reflog for A, but that would be a more invasive change. Failing early means we keep both reflogs, which puts the operator in a good position to understand the problem and recover. A long term goal is to avoid these problems altogether and roll back the transaction on failure. That kind of transactionality will have to wait for a later series (the plan for which is to make all destructive work happen in a single update of the packed-refs file). Signed-off-by: Jonathan Nieder Reviewed-by: Ronnie Sahlberg --- Thanks for reading. refs.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/refs.c b/refs.c index 550223c..3b27758 100644 --- a/refs.c +++ b/refs.c @@ -3714,16 +3714,20 @@ int ref_transaction_commit(struct ref_transaction *transaction, struct ref_update *update = updates[i]; if (update->lock) { - if (delete_ref_loose(update->lock, update->type, err)) + if (delete_ref_loose(update->lock, update->type, err)) { ret = -1; + goto cleanup; + } if (!(update->flags & REF_ISPRUNING)) delnames[delnum++] = update->lock->ref_name; } } - if (repack_without_refs(delnames, delnum, err)) + if (repack_without_refs(delnames, delnum, err)) { ret = -1; + goto cleanup; + } for (i = 0; i < delnum; i++) unlink_or_warn(git_path("logs/%s", delnames[i])); clear_loose_ref_cache(&ref_cache); -- 2.1.0.rc2.206.gedb03e5