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-rw-r--r--drivers/block/drbd/drbd_int.h1
-rw-r--r--drivers/block/drbd/drbd_main.c2
-rw-r--r--drivers/block/drbd/drbd_receiver.c35
3 files changed, 23 insertions, 15 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 84b4575..3c8eecd 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -97,6 +97,7 @@ extern char usermode_helper[];
#define ID_SYNCER (-1ULL)
#define ID_VACANT 0
#define is_syncer_block_id(id) ((id) == ID_SYNCER)
+#define UUID_NEW_BM_OFFSET ((u64)0x0001000000000000ULL)
struct drbd_conf;
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index da98bff..b3b6d31 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2022,7 +2022,7 @@ int drbd_gen_and_send_sync_uuid(struct drbd_conf *mdev)
D_ASSERT(mdev->state.disk == D_UP_TO_DATE);
- get_random_bytes(&uuid, sizeof(u64));
+ uuid = mdev->ldev->md.uuid[UI_BITMAP] + UUID_NEW_BM_OFFSET;
drbd_uuid_set(mdev, UI_BITMAP, uuid);
drbd_md_sync(mdev);
p.uuid = cpu_to_be64(uuid);
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index fd0957f..7991183 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -2293,6 +2293,8 @@ static void drbd_uuid_dump(struct drbd_conf *mdev, char *text, u64 *uuid,
-2 C_SYNC_TARGET set BitMap
-100 after split brain, disconnect
-1000 unrelated data
+-1091 requires proto 91
+-1096 requires proto 96
*/
static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(local)
{
@@ -2322,7 +2324,7 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
if (mdev->p_uuid[UI_BITMAP] == (u64)0 && mdev->ldev->md.uuid[UI_BITMAP] != (u64)0) {
if (mdev->agreed_pro_version < 91)
- return -1001;
+ return -1091;
if ((mdev->ldev->md.uuid[UI_BITMAP] & ~((u64)1)) == (mdev->p_uuid[UI_HISTORY_START] & ~((u64)1)) &&
(mdev->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1)) == (mdev->p_uuid[UI_HISTORY_START + 1] & ~((u64)1))) {
@@ -2343,7 +2345,7 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
if (mdev->ldev->md.uuid[UI_BITMAP] == (u64)0 && mdev->p_uuid[UI_BITMAP] != (u64)0) {
if (mdev->agreed_pro_version < 91)
- return -1001;
+ return -1091;
if ((mdev->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1)) == (mdev->p_uuid[UI_BITMAP] & ~((u64)1)) &&
(mdev->ldev->md.uuid[UI_HISTORY_START + 1] & ~((u64)1)) == (mdev->p_uuid[UI_HISTORY_START] & ~((u64)1))) {
@@ -2388,17 +2390,22 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
*rule_nr = 51;
peer = mdev->p_uuid[UI_HISTORY_START] & ~((u64)1);
if (self == peer) {
- self = mdev->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1);
- peer = mdev->p_uuid[UI_HISTORY_START + 1] & ~((u64)1);
- if (self == peer) {
+ if (mdev->agreed_pro_version < 96 ?
+ (mdev->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1)) ==
+ (mdev->p_uuid[UI_HISTORY_START + 1] & ~((u64)1)) :
+ peer + UUID_NEW_BM_OFFSET == (mdev->p_uuid[UI_BITMAP] & ~((u64)1))) {
/* The last P_SYNC_UUID did not get though. Undo the last start of
resync as sync source modifications of the peer's UUIDs. */
if (mdev->agreed_pro_version < 91)
- return -1001;
+ return -1091;
mdev->p_uuid[UI_BITMAP] = mdev->p_uuid[UI_HISTORY_START];
mdev->p_uuid[UI_HISTORY_START] = mdev->p_uuid[UI_HISTORY_START + 1];
+
+ dev_info(DEV, "Did not got last syncUUID packet, corrected:\n");
+ drbd_uuid_dump(mdev, "peer", mdev->p_uuid, mdev->p_uuid[UI_SIZE], mdev->p_uuid[UI_FLAGS]);
+
return -1;
}
}
@@ -2420,20 +2427,20 @@ static int drbd_uuid_compare(struct drbd_conf *mdev, int *rule_nr) __must_hold(l
*rule_nr = 71;
self = mdev->ldev->md.uuid[UI_HISTORY_START] & ~((u64)1);
if (self == peer) {
- self = mdev->ldev->md.uuid[UI_HISTORY_START + 1] & ~((u64)1);
- peer = mdev->p_uuid[UI_HISTORY_START] & ~((u64)1);
- if (self == peer) {
+ if (mdev->agreed_pro_version < 96 ?
+ (mdev->ldev->md.uuid[UI_HISTORY_START + 1] & ~((u64)1)) ==
+ (mdev->p_uuid[UI_HISTORY_START] & ~((u64)1)) :
+ self + UUID_NEW_BM_OFFSET == (mdev->ldev->md.uuid[UI_BITMAP] & ~((u64)1))) {
/* The last P_SYNC_UUID did not get though. Undo the last start of
resync as sync source modifications of our UUIDs. */
if (mdev->agreed_pro_version < 91)
- return -1001;
+ return -1091;
_drbd_uuid_set(mdev, UI_BITMAP, mdev->ldev->md.uuid[UI_HISTORY_START]);
_drbd_uuid_set(mdev, UI_HISTORY_START, mdev->ldev->md.uuid[UI_HISTORY_START + 1]);
- dev_info(DEV, "Undid last start of resync:\n");
-
+ dev_info(DEV, "Last syncUUID did not get through, corrected:\n");
drbd_uuid_dump(mdev, "self", mdev->ldev->md.uuid,
mdev->state.disk >= D_NEGOTIATING ? drbd_bm_total_weight(mdev) : 0, 0);
@@ -2496,8 +2503,8 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_conf *mdev, enum drbd_rol
dev_alert(DEV, "Unrelated data, aborting!\n");
return C_MASK;
}
- if (hg == -1001) {
- dev_alert(DEV, "To resolve this both sides have to support at least protocol 91\n");
+ if (hg < -1000) {
+ dev_alert(DEV, "To resolve this both sides have to support at least protocol %d\n", -hg - 1000);
return C_MASK;
}