Commit eb12010e authored Aug 01, 2012 by Lars Ellenberg Committed by Philipp Reisner Nov 09, 2012

drbd: disambiguation, s/ERR_DISCARD/ERR_DISCARD_IMPOSSIBLE/



If for some reason (typically "split-brained" cluster manager)
drbd replica data has diverged, we can chose a victim,
and reconnect using "--discard-my-data", causing the victim
to become sync-target, fetching all changed blocks from the peer.

If we are Primary, we are potentially in use, and we refuse to
"roll back" changes to the data below the page cache and other users.

Rename the error symbol for this to ERR_DISCARD_IMPOSSIBLE.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

parent 427c0434

drivers/block/drbd/drbd_nl.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1829,7 +1829,7 @@ _check_net_options(struct drbd_tconn tconn, struct net_conf old_conf, struct n
		return ERR_STONITH_AND_PROT_A;
		}
		if (mdev->state.role == R_PRIMARY && new_conf->discard_my_data)
		return ERR_DISCARD;
		return ERR_DISCARD_IMPOSSIBLE;
		}

		if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A)

include/linux/drbd.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -136,7 +136,7 @@ enum drbd_ret_code {
		ERR_AUTH_ALG = 120,
		ERR_AUTH_ALG_ND = 121,
		ERR_NOMEM = 122,
		ERR_DISCARD = 123,
		ERR_DISCARD_IMPOSSIBLE = 123,
		ERR_DISK_CONFIGURED = 124,
		ERR_NET_CONFIGURED = 125,
		ERR_MANDATORY_TAG = 126,