From: Jan Schmidt Date: Thu, 21 Mar 2013 14:30:23 +0000 (+0000) Subject: Btrfs: fix EIO from btrfs send in is_extent_unchanged for punched holes X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=adaa4b8e4d47eeb114513c2f7a172929154b94bd;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git Btrfs: fix EIO from btrfs send in is_extent_unchanged for punched holes When you take a snapshot, punch a hole where there has been data, then take another snapshot and try to send an incremental stream, btrfs send would give you EIO. That is because is_extent_unchanged had no support for holes being punched. With this patch, instead of returning EIO we just return 0 (== the extent is not unchanged) and we're good. Signed-off-by: Jan Schmidt Cc: Alexander Block Signed-off-by: Josef Bacik --- diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index 68da757615ae..ed897dc11356 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -3945,12 +3945,10 @@ static int is_extent_unchanged(struct send_ctx *sctx, found_key.type != key.type) { key.offset += right_len; break; - } else { - if (found_key.offset != key.offset + right_len) { - /* Should really not happen */ - ret = -EIO; - goto out; - } + } + if (found_key.offset != key.offset + right_len) { + ret = 0; + goto out; } key = found_key; }