From: Alex Elder Date: Sat, 30 Mar 2013 18:31:02 +0000 (-0500) Subject: libceph: fix broken data length assertions X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1190bf06a6b033384a65b5acdb1193d41cd257a6;p=linux-beck.git libceph: fix broken data length assertions It's OK for the result of a read to come back with fewer bytes than were requested. So don't trigger a BUG() in that case when initializing the data cursor. This resolves the first problem described in: http://tracker.ceph.com/issues/4598 Signed-off-by: Alex Elder Reviewed-by: Sage Weil --- diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index d4e46d8a088c..24f3aba34800 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -833,7 +833,7 @@ static void ceph_msg_data_pages_cursor_init(struct ceph_msg_data *data, BUG_ON(!data->pages); BUG_ON(!data->length); - BUG_ON(length != data->length); + BUG_ON(length > data->length); /* short reads are OK */ cursor->resid = length; page_count = calc_pages_for(data->alignment, (u64)data->length); @@ -905,7 +905,7 @@ static void ceph_msg_data_pagelist_cursor_init(struct ceph_msg_data *data, pagelist = data->pagelist; BUG_ON(!pagelist); - BUG_ON(length != pagelist->length); + BUG_ON(length > pagelist->length); /* short reads are OK */ if (!length) return; /* pagelist can be assigned but empty */