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Message-Id: <1315485937-18989-4-git-send-email-philipp.reisner@linbit.com>
Date: Thu, 8 Sep 2011 14:45:24 +0200
From: Philipp Reisner <philipp.reisner@...bit.com>
To: linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>
Cc: drbd-dev@...ts.linbit.com
Subject: [PATCH 03/16] drbd: Print common state changes of all volumes as connection state changes
Signed-off-by: Philipp Reisner <philipp.reisner@...bit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@...bit.com>
---
drivers/block/drbd/drbd_state.c | 159 ++++++++++++++-------------------------
drivers/block/drbd/drbd_state.h | 19 +++--
2 files changed, 70 insertions(+), 108 deletions(-)
diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index 3c3c141..ea2bf74 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -332,29 +332,29 @@ void print_st_err(struct drbd_conf *mdev, union drbd_state os,
print_st(mdev, "wanted", ns);
}
-static void print_state_change(struct drbd_conf *mdev, union drbd_state os, union drbd_state ns,
+static long print_state_change(char *pb, union drbd_state os, union drbd_state ns,
enum chg_state_flags flags)
{
- char *pbp, pb[300];
+ char *pbp;
pbp = pb;
*pbp = 0;
- if (ns.role != os.role)
+ if (ns.role != os.role && flags & CS_DC_ROLE)
pbp += sprintf(pbp, "role( %s -> %s ) ",
drbd_role_str(os.role),
drbd_role_str(ns.role));
- if (ns.peer != os.peer)
+ if (ns.peer != os.peer && flags & CS_DC_PEER)
pbp += sprintf(pbp, "peer( %s -> %s ) ",
drbd_role_str(os.peer),
drbd_role_str(ns.peer));
- if (ns.conn != os.conn && !(flags & CS_NO_CSTATE_CHG))
+ if (ns.conn != os.conn && flags & CS_DC_CONN)
pbp += sprintf(pbp, "conn( %s -> %s ) ",
drbd_conn_str(os.conn),
drbd_conn_str(ns.conn));
- if (ns.disk != os.disk)
+ if (ns.disk != os.disk && flags & CS_DC_DISK)
pbp += sprintf(pbp, "disk( %s -> %s ) ",
drbd_disk_str(os.disk),
drbd_disk_str(ns.disk));
- if (ns.pdsk != os.pdsk)
+ if (ns.pdsk != os.pdsk && flags & CS_DC_PDSK)
pbp += sprintf(pbp, "pdsk( %s -> %s ) ",
drbd_disk_str(os.pdsk),
drbd_disk_str(ns.pdsk));
@@ -374,10 +374,29 @@ static void print_state_change(struct drbd_conf *mdev, union drbd_state os, unio
pbp += sprintf(pbp, "user_isp( %d -> %d ) ",
os.user_isp,
ns.user_isp);
- if (pbp != pb)
+
+ return pbp - pb;
+}
+
+static void drbd_pr_state_change(struct drbd_conf *mdev, union drbd_state os, union drbd_state ns,
+ enum chg_state_flags flags)
+{
+ char pb[300];
+
+ if (print_state_change(pb, os, ns, flags ^ CS_DC_MASK))
dev_info(DEV, "%s\n", pb);
}
+static void conn_pr_state_change(struct drbd_tconn *tconn, union drbd_state os, union drbd_state ns,
+ enum chg_state_flags flags)
+{
+ char pb[300];
+
+ if (print_state_change(pb, os, ns, flags))
+ conn_info(tconn, "%s\n", pb);
+}
+
+
/**
* is_valid_state() - Returns an SS_ error code if ns is not valid
* @mdev: DRBD device.
@@ -809,7 +828,7 @@ __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns,
if (warn_sync_abort)
dev_warn(DEV, "%s aborted.\n", warn_sync_abort);
- print_state_change(mdev, os, ns, flags);
+ drbd_pr_state_change(mdev, os, ns, flags);
/* if we are going -> D_FAILED or D_DISKLESS, grab one extra reference
* on the ldev here, to be sure the transition -> D_DISKLESS resp.
@@ -1346,98 +1365,41 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused)
return 0;
}
-static void print_conn_state_change(struct drbd_tconn *tconn, enum drbd_conns oc, enum drbd_conns nc)
-{
- char *pbp, pb[300];
- pbp = pb;
- *pbp = 0;
- if (nc != oc)
- pbp += sprintf(pbp, "conn( %s -> %s ) ",
- drbd_conn_str(oc),
- drbd_conn_str(nc));
-
- conn_info(tconn, "%s\n", pb);
-}
-
-enum sp_state {
- OC_UNINITIALIZED,
- OC_CONSISTENT,
- OC_INCONSISTENT,
-} oc_state;
-
-static void common_state_part(enum sp_state *sps, int *sp, int nsp)
-{
- switch (*sps) {
- case OC_UNINITIALIZED:
- *sp = nsp;
- *sps = OC_CONSISTENT;
- break;
- case OC_CONSISTENT:
- if (*sp != nsp)
- *sps = OC_INCONSISTENT;
- break;
- case OC_INCONSISTENT:
- break;
- }
-}
-
-void conn_old_common_state(struct drbd_tconn *tconn, union drbd_state *pcs, union drbd_state *pmask)
+void conn_old_common_state(struct drbd_tconn *tconn, union drbd_state *pcs, enum chg_state_flags *pf)
{
- union drbd_state css = {}; /* common state state */
+ enum chg_state_flags flags = ~0;
union drbd_state os, cs = {}; /* old_state, common_state */
- union drbd_state mask = {};
- enum sp_state sps; /* state part state */
- int sp; /* state part */
struct drbd_conf *mdev;
- int vnr;
+ int vnr, first_vol = 1;
idr_for_each_entry(&tconn->volumes, mdev, vnr) {
os = mdev->state;
- sps = css.role;
- sp = cs.role;
- common_state_part(&sps, &sp, os.role);
- css.role = sps;
- cs.role = sp;
-
- sps = css.peer;
- sp = cs.peer;
- common_state_part(&sps, &sp, os.peer);
- css.peer = sps;
- cs.peer = sp;
-
- sps = css.conn;
- sp = cs.conn;
- common_state_part(&sps, &sp, os.conn);
- css.conn = sps;
- cs.conn = sp;
-
- sps = css.disk;
- sp = cs.disk;
- common_state_part(&sps, &sp, os.disk);
- css.disk = sps;
- cs.disk = sp;
-
- sps = css.pdsk;
- sp = cs.pdsk;
- common_state_part(&sps, &sp, os.pdsk);
- css.pdsk = sps;
- cs.pdsk = sp;
- }
+ if (first_vol) {
+ cs = os;
+ first_vol = 0;
+ continue;
+ }
+
+ if (cs.role != os.role)
+ flags &= ~CS_DC_ROLE;
+
+ if (cs.peer != os.peer)
+ flags &= ~CS_DC_PEER;
+
+ if (cs.conn != os.conn)
+ flags &= ~CS_DC_CONN;
- if (css.role == OC_CONSISTENT)
- mask.role = R_MASK;
- if (css.peer == OC_CONSISTENT)
- mask.peer = R_MASK;
- if (css.conn == OC_CONSISTENT)
- mask.conn = C_MASK;
- if (css.disk == OC_CONSISTENT)
- mask.disk = D_MASK;
- if (css.pdsk == OC_CONSISTENT)
- mask.pdsk = D_MASK;
+ if (cs.disk != os.disk)
+ flags &= ~CS_DC_DISK;
+ if (cs.pdsk != os.pdsk)
+ flags &= ~CS_DC_PDSK;
+ }
+
+ *pf |= CS_DC_MASK;
+ *pf &= flags;
*pcs = cs;
- *pmask = mask;
}
static enum drbd_state_rv
@@ -1523,7 +1485,7 @@ _conn_rq_cond(struct drbd_tconn *tconn, union drbd_state mask, union drbd_state
rv = oc != C_WF_REPORT_PARAMS ? SS_CW_NO_NEED : SS_UNKNOWN_ERROR;
if (rv == SS_UNKNOWN_ERROR)
- rv = conn_is_valid_transition(tconn, mask, val, CS_NO_CSTATE_CHG);
+ rv = conn_is_valid_transition(tconn, mask, val, 0);
if (rv == SS_SUCCESS)
rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */
@@ -1565,7 +1527,7 @@ _conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_
enum drbd_state_rv rv = SS_SUCCESS;
struct after_conn_state_chg_work *acscw;
enum drbd_conns oc = tconn->cstate;
- union drbd_state ms, os_val, os_mask;
+ union drbd_state ms, os;
rv = is_valid_conn_transition(oc, val.conn);
if (rv < SS_SUCCESS)
@@ -1581,19 +1543,14 @@ _conn_request_state(struct drbd_tconn *tconn, union drbd_state mask, union drbd_
goto abort;
}
- conn_old_common_state(tconn, &os_val, &os_mask);
- if (os_mask.conn == C_MASK) {
- oc = os_val.conn;
- print_conn_state_change(tconn, oc, val.conn);
- flags |= CS_NO_CSTATE_CHG;
- }
-
+ conn_old_common_state(tconn, &os, &flags);
ms = conn_set_state(tconn, mask, val, flags);
ms.conn = val.conn;
+ conn_pr_state_change(tconn, os, ms, flags);
acscw = kmalloc(sizeof(*acscw), GFP_ATOMIC);
if (acscw) {
- acscw->oc = oc;
+ acscw->oc = os.conn;
acscw->nms = ms;
acscw->flags = flags;
acscw->w.cb = w_after_conn_state_ch;
diff --git a/drivers/block/drbd/drbd_state.h b/drivers/block/drbd/drbd_state.h
index 394a199..11fd0f8 100644
--- a/drivers/block/drbd/drbd_state.h
+++ b/drivers/block/drbd/drbd_state.h
@@ -57,13 +57,18 @@ struct drbd_tconn;
__ns.T2 = (S2); __ns.T3 = (S3); __ns; })
enum chg_state_flags {
- CS_HARD = 1,
- CS_VERBOSE = 2,
- CS_WAIT_COMPLETE = 4,
- CS_SERIALIZE = 8,
- CS_ORDERED = CS_WAIT_COMPLETE + CS_SERIALIZE,
- CS_NO_CSTATE_CHG = 16, /* Do not display changes in cstate. Internal to drbd_state.c */
- CS_LOCAL_ONLY = 32, /* Do not consider a device pair wide state change */
+ CS_HARD = 1 << 0,
+ CS_VERBOSE = 1 << 1,
+ CS_WAIT_COMPLETE = 1 << 2,
+ CS_SERIALIZE = 1 << 3,
+ CS_ORDERED = CS_WAIT_COMPLETE + CS_SERIALIZE,
+ CS_LOCAL_ONLY = 1 << 4, /* Do not consider a device pair wide state change */
+ CS_DC_ROLE = 1 << 5, /* DC = display as connection state change */
+ CS_DC_PEER = 1 << 6,
+ CS_DC_CONN = 1 << 7,
+ CS_DC_DISK = 1 << 8,
+ CS_DC_PDSK = 1 << 9,
+ CS_DC_MASK = CS_DC_ROLE + CS_DC_PEER + CS_DC_CONN + CS_DC_DISK + CS_DC_PDSK,
};
extern enum drbd_state_rv drbd_change_state(struct drbd_conf *mdev,
--
1.7.4.1
--
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