[Drbd-dev] [PATCH 04/11] drbd: Introduced a new type union drbd_dev_state
Philipp Reisner
philipp.reisner at linbit.com
Fri Sep 9 13:17:29 CEST 2011
Signed-off-by: Philipp Reisner <philipp.reisner at linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg at linbit.com>
---
drivers/block/drbd/drbd_int.h | 6 +++---
drivers/block/drbd/drbd_main.c | 5 +----
drivers/block/drbd/drbd_nl.c | 4 ++--
drivers/block/drbd/drbd_req.h | 4 ++--
drivers/block/drbd/drbd_state.c | 6 +++---
drivers/block/drbd/drbd_state.h | 34 ++++++++++++++++++++++++++++++++++
6 files changed, 45 insertions(+), 14 deletions(-)
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index e33a770..912ee5e 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -935,7 +935,7 @@ struct drbd_conf {
/* Used after attach while negotiating new disk state. */
union drbd_state new_state_tmp;
- union drbd_state state;
+ union drbd_dev_state state;
wait_queue_head_t misc_wait;
wait_queue_head_t state_wait; /* upon each state change. */
unsigned int send_cnt;
@@ -1689,7 +1689,7 @@ static inline union drbd_state drbd_read_state(struct drbd_conf *mdev)
{
union drbd_state rv;
- rv = mdev->state;
+ rv.i = mdev->state.i;
rv.susp = mdev->tconn->susp;
rv.susp_nod = mdev->tconn->susp_nod;
rv.susp_fen = mdev->tconn->susp_fen;
@@ -2155,7 +2155,7 @@ static inline int drbd_get_max_buffers(struct drbd_conf *mdev)
static inline int drbd_state_is_stable(struct drbd_conf *mdev)
{
- union drbd_state s = mdev->state;
+ union drbd_dev_state s = mdev->state;
/* DO NOT add a default clause, we want the compiler to warn us
* for any newly introduced state we may have forgotten to add here */
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index a773d73..a6459f7 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1823,15 +1823,12 @@ static void drbd_set_defaults(struct drbd_conf *mdev)
{
/* Beware! The actual layout differs
* between big endian and little endian */
- mdev->state = (union drbd_state) {
+ mdev->state = (union drbd_dev_state) {
{ .role = R_SECONDARY,
.peer = R_UNKNOWN,
.conn = C_STANDALONE,
.disk = D_DISKLESS,
.pdsk = D_UNKNOWN,
- .susp = 0,
- .susp_nod = 0,
- .susp_fen = 0
} };
}
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 57f320e..02d4224 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1475,7 +1475,7 @@ int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info)
clear_bit(CRASHED_PRIMARY, &mdev->flags);
if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) &&
- !(mdev->state.role == R_PRIMARY && mdev->state.susp_nod)) {
+ !(mdev->state.role == R_PRIMARY && mdev->tconn->susp_nod)) {
set_bit(CRASHED_PRIMARY, &mdev->flags);
cp_discovered = 1;
}
@@ -2402,7 +2402,7 @@ out:
int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info)
{
- union drbd_state s;
+ union drbd_dev_state s;
enum drbd_ret_code retcode;
retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR);
diff --git a/drivers/block/drbd/drbd_req.h b/drivers/block/drbd/drbd_req.h
index 4e1f129..b9f474a 100644
--- a/drivers/block/drbd/drbd_req.h
+++ b/drivers/block/drbd/drbd_req.h
@@ -294,7 +294,7 @@ static inline int req_mod(struct drbd_request *req,
return rv;
}
-static inline bool drbd_should_do_remote(union drbd_state s)
+static inline bool drbd_should_do_remote(union drbd_dev_state s)
{
return s.pdsk == D_UP_TO_DATE ||
(s.pdsk >= D_INCONSISTENT &&
@@ -304,7 +304,7 @@ static inline bool drbd_should_do_remote(union drbd_state s)
That is equivalent since before 96 IO was frozen in the C_WF_BITMAP*
states. */
}
-static inline bool drbd_should_send_out_of_sync(union drbd_state s)
+static inline bool drbd_should_send_out_of_sync(union drbd_dev_state s)
{
return s.conn == C_AHEAD || s.conn == C_WF_BITMAP_S;
/* pdsk = D_INCONSISTENT as a consequence. Protocol 96 check not necessary
diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index 9354006..64284b8 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -842,7 +842,7 @@ __drbd_set_state(struct drbd_conf *mdev, union drbd_state ns,
(os.disk != D_DISKLESS && ns.disk == D_DISKLESS))
atomic_inc(&mdev->local_cnt);
- mdev->state = ns;
+ mdev->state.i = ns.i;
mdev->tconn->susp = ns.susp;
mdev->tconn->susp_nod = ns.susp_nod;
mdev->tconn->susp_fen = ns.susp_fen;
@@ -1375,7 +1375,7 @@ static int w_after_conn_state_ch(struct drbd_work *w, int unused)
void conn_old_common_state(struct drbd_tconn *tconn, union drbd_state *pcs, enum chg_state_flags *pf)
{
enum chg_state_flags flags = ~0;
- union drbd_state os, cs = {}; /* old_state, common_state */
+ union drbd_dev_state os, cs = {}; /* old_state, common_state */
struct drbd_conf *mdev;
int vnr, first_vol = 1;
@@ -1406,7 +1406,7 @@ void conn_old_common_state(struct drbd_tconn *tconn, union drbd_state *pcs, enum
*pf |= CS_DC_MASK;
*pf &= flags;
- *pcs = cs;
+ (*pcs).i = cs.i;
}
static enum drbd_state_rv
diff --git a/drivers/block/drbd/drbd_state.h b/drivers/block/drbd/drbd_state.h
index fdcfab9..0f8441d 100644
--- a/drivers/block/drbd/drbd_state.h
+++ b/drivers/block/drbd/drbd_state.h
@@ -72,6 +72,40 @@ enum chg_state_flags {
CS_IGN_OUTD_FAIL = 1 << 10,
};
+/* drbd_dev_state and drbd_state are different types. This is to stress the
+ small difference. There is no suspended flag (.susp), and no suspended
+ while fence handler runs flas (susp_fen). */
+union drbd_dev_state {
+ struct {
+#if defined(__LITTLE_ENDIAN_BITFIELD)
+ unsigned role:2 ; /* 3/4 primary/secondary/unknown */
+ unsigned peer:2 ; /* 3/4 primary/secondary/unknown */
+ unsigned conn:5 ; /* 17/32 cstates */
+ unsigned disk:4 ; /* 8/16 from D_DISKLESS to D_UP_TO_DATE */
+ unsigned pdsk:4 ; /* 8/16 from D_DISKLESS to D_UP_TO_DATE */
+ unsigned _unused:1 ;
+ unsigned aftr_isp:1 ; /* isp .. imposed sync pause */
+ unsigned peer_isp:1 ;
+ unsigned user_isp:1 ;
+ unsigned _pad:11; /* 0 unused */
+#elif defined(__BIG_ENDIAN_BITFIELD)
+ unsigned _pad:11;
+ unsigned user_isp:1 ;
+ unsigned peer_isp:1 ;
+ unsigned aftr_isp:1 ; /* isp .. imposed sync pause */
+ unsigned _unused:1 ;
+ unsigned pdsk:4 ; /* 8/16 from D_DISKLESS to D_UP_TO_DATE */
+ unsigned disk:4 ; /* 8/16 from D_DISKLESS to D_UP_TO_DATE */
+ unsigned conn:5 ; /* 17/32 cstates */
+ unsigned peer:2 ; /* 3/4 primary/secondary/unknown */
+ unsigned role:2 ; /* 3/4 primary/secondary/unknown */
+#else
+# error "this endianess is not supported"
+#endif
+ };
+ unsigned int i;
+};
+
extern enum drbd_state_rv drbd_change_state(struct drbd_conf *mdev,
enum chg_state_flags f,
union drbd_state mask,
--
1.7.4.1
More information about the drbd-dev
mailing list