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Subject[PATCH 15/21] drbd: introduce peer state union
Date
Add peer structure and propagate in conn_khelper() instead
of hardcoded values.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
---
drivers/block/drbd/drbd_nl.c | 13 +++++++------
include/linux/drbd.h | 8 ++++++++
2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index ef136a9..7a5f148 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -387,7 +387,8 @@ int drbd_khelper(struct drbd_device *device, char *cmd)
return ret;
}

-static int conn_khelper(struct drbd_connection *connection, char *cmd)
+static enum drbd_peer_state conn_khelper(struct drbd_connection *connection,
+ char *cmd)
{
char *envp[] = { "HOME=/",
"TERM=linux",
@@ -485,17 +486,17 @@ bool conn_try_outdate_peer(struct drbd_connection *connection)
r = conn_khelper(connection, "fence-peer");

switch ((r>>8) & 0xff) {
- case 3: /* peer is inconsistent */
+ case P_INCONSISTENT: /* peer is inconsistent */
ex_to_string = "peer is inconsistent or worse";
mask.pdsk = D_MASK;
val.pdsk = D_INCONSISTENT;
break;
- case 4: /* peer got outdated, or was already outdated */
+ case P_OUTDATED: /* peer got outdated, or was already outdated */
ex_to_string = "peer was fenced";
mask.pdsk = D_MASK;
val.pdsk = D_OUTDATED;
break;
- case 5: /* peer was down */
+ case P_DOWN: /* peer was down */
if (conn_highest_disk(connection) == D_UP_TO_DATE) {
/* we will(have) create(d) a new UUID anyways... */
ex_to_string = "peer is unreachable, assumed to be dead";
@@ -505,7 +506,7 @@ bool conn_try_outdate_peer(struct drbd_connection *connection)
ex_to_string = "peer unreachable, doing nothing since disk != UpToDate";
}
break;
- case 6: /* Peer is primary, voluntarily outdate myself.
+ case P_PRIMARY: /* Peer is primary, voluntarily outdate myself.
* This is useful when an unconnected R_SECONDARY is asked to
* become R_PRIMARY, but finds the other peer being active. */
ex_to_string = "peer is active";
@@ -513,7 +514,7 @@ bool conn_try_outdate_peer(struct drbd_connection *connection)
mask.disk = D_MASK;
val.disk = D_OUTDATED;
break;
- case 7:
+ case P_FENCING:
if (fp != FP_STONITH)
drbd_err(connection, "fence-peer() = 7 && fencing != Stonith !!!\n");
ex_to_string = "peer was stonithed";
diff --git a/include/linux/drbd.h b/include/linux/drbd.h
index d6b3c99..1f20a62 100644
--- a/include/linux/drbd.h
+++ b/include/linux/drbd.h
@@ -370,6 +370,14 @@ enum drbd_notification_type {
NOTIFY_FLAGS = NOTIFY_CONTINUES,
};

+enum drbd_peer_state {
+ P_INCONSISTENT = 3,
+ P_OUTDATED = 4,
+ P_DOWN = 5,
+ P_PRIMARY = 6,
+ P_FENCING = 7
+};
+
#define UUID_JUST_CREATED ((__u64)4)

enum write_ordering_e {
--
2.1.4


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