From 4da2751451ffa2757f11b8433fdf02c949c5e21e Mon Sep 17 00:00:00 2001 From: Gui Hecheng Date: Thu, 5 Jun 2014 10:02:52 +0800 Subject: [PATCH] btrfs-progs: show meaningful msgs for replace cmd upon raid56 This depends on the kernel patch: [PATCH] btrfs:replace EINVAL with EOPNOTSUPP for dev_replace This catches the EOPNOTSUPP and output msg that says dev_replace raid56 is not currently supported. Note that the msg will only be shown when run dev_replace not in background. Signed-off-by: Gui Hecheng Signed-off-by: David Sterba --- cmds-replace.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/cmds-replace.c b/cmds-replace.c index 186a127f..9fe7ad85 100644 --- a/cmds-replace.c +++ b/cmds-replace.c @@ -308,6 +308,11 @@ static int cmd_start_replace(int argc, char **argv) "ERROR: ioctl(DEV_REPLACE_START) failed on \"%s\": %s, %s\n", path, strerror(errno), replace_dev_result2string(start_args.result)); + + if (errno == EOPNOTSUPP) + fprintf(stderr, + "WARNING: dev_replace does not yet handle RAID5/6\n"); + goto leave_with_error; }