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drbd: preparation commit, using full state in receive_state() 

no functional change, just using full state instead of just the .conn
part of it for comparisons.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Lars Ellenberg 2010-07-22 17:39:26 +02:00 committed by Philipp Reisner
parent 2b2bf2148f
commit 4ac4aadacb
1 changed files with 18 additions and 21 deletions
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39
drivers/block/drbd/drbd_receiver.c
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@ -3242,8 +3242,7 @@ static int receive_req_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsi
static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned int data_size)
{
struct p_state *p = &mdev->data.rbuf.state;
enum drbd_conns nconn, oconn;
union drbd_state ns, peer_state;
union drbd_state os, ns, peer_state;
enum drbd_disk_state real_peer_disk;
enum chg_state_flags cs_flags;
int rv;
@ -3258,38 +3257,38 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
spin_lock_irq(&mdev->req_lock);
retry:
oconn = nconn = mdev->state.conn;
os = ns = mdev->state;
spin_unlock_irq(&mdev->req_lock);
if (nconn == C_WF_REPORT_PARAMS)
nconn = C_CONNECTED;
if (ns.conn == C_WF_REPORT_PARAMS)
ns.conn = C_CONNECTED;
if (mdev->p_uuid && peer_state.disk >= D_NEGOTIATING &&
get_ldev_if_state(mdev, D_NEGOTIATING)) {
int cr; /* consider resync */
/* if we established a new connection */
cr = (oconn < C_CONNECTED);
cr = (os.conn < C_CONNECTED);
/* if we had an established connection
* and one of the nodes newly attaches a disk */
cr |= (oconn == C_CONNECTED &&
cr |= (os.conn == C_CONNECTED &&
(peer_state.disk == D_NEGOTIATING ||
mdev->state.disk == D_NEGOTIATING));
os.disk == D_NEGOTIATING));
/* if we have both been inconsistent, and the peer has been
* forced to be UpToDate with --overwrite-data */
cr |= test_bit(CONSIDER_RESYNC, &mdev->flags);
/* if we had been plain connected, and the admin requested to
* start a sync by "invalidate" or "invalidate-remote" */
cr |= (oconn == C_CONNECTED &&
cr |= (os.conn == C_CONNECTED &&
(peer_state.conn >= C_STARTING_SYNC_S &&
peer_state.conn <= C_WF_BITMAP_T));
if (cr)
nconn = drbd_sync_handshake(mdev, peer_state.role, real_peer_disk);
ns.conn = drbd_sync_handshake(mdev, peer_state.role, real_peer_disk);
put_ldev(mdev);
if (nconn == C_MASK) {
nconn = C_CONNECTED;
if (ns.conn == C_MASK) {
ns.conn = C_CONNECTED;
if (mdev->state.disk == D_NEGOTIATING) {
drbd_force_state(mdev, NS(disk, D_DISKLESS));
} else if (peer_state.disk == D_NEGOTIATING) {
@ -3299,7 +3298,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
} else {
if (test_and_clear_bit(CONN_DRY_RUN, &mdev->flags))
return FALSE;
D_ASSERT(oconn == C_WF_REPORT_PARAMS);
D_ASSERT(os.conn == C_WF_REPORT_PARAMS);
drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
return FALSE;
}
@ -3307,18 +3306,16 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
}
spin_lock_irq(&mdev->req_lock);
if (mdev->state.conn != oconn)
if (mdev->state.i != os.i)
goto retry;
clear_bit(CONSIDER_RESYNC, &mdev->flags);
ns.i = mdev->state.i;
ns.conn = nconn;
ns.peer = peer_state.role;
ns.pdsk = real_peer_disk;
ns.peer_isp = (peer_state.aftr_isp | peer_state.user_isp);
if ((nconn == C_CONNECTED || nconn == C_WF_BITMAP_S) && ns.disk == D_NEGOTIATING)
if ((ns.conn == C_CONNECTED || ns.conn == C_WF_BITMAP_S) && ns.disk == D_NEGOTIATING)
ns.disk = mdev->new_state_tmp.disk;
cs_flags = CS_VERBOSE + (oconn < C_CONNECTED && nconn >= C_CONNECTED ? 0 : CS_HARD);
if (ns.pdsk == D_CONSISTENT && is_susp(ns) && nconn == C_CONNECTED && oconn < C_CONNECTED &&
cs_flags = CS_VERBOSE + (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED ? 0 : CS_HARD);
if (ns.pdsk == D_CONSISTENT && is_susp(ns) && ns.conn == C_CONNECTED && os.conn < C_CONNECTED &&
test_bit(NEW_CUR_UUID, &mdev->flags)) {
/* Do not allow tl_restart(resend) for a rebooted peer. We can only allow this
for temporal network outages! */
@ -3339,8 +3336,8 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
return FALSE;
}
if (oconn > C_WF_REPORT_PARAMS) {
if (nconn > C_CONNECTED && peer_state.conn <= C_CONNECTED &&
if (os.conn > C_WF_REPORT_PARAMS) {
if (ns.conn > C_CONNECTED && peer_state.conn <= C_CONNECTED &&
peer_state.disk != D_NEGOTIATING ) {
/* we want resync, peer has not yet decided to sync... */
/* Nowadays only used when forcing a node into primary role and