mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

drbd: moved req_lock and transfer log from mdev to tconn 

sed -i \
       -e 's/mdev->req_lock/mdev->tconn->req_lock/g' \
       -e 's/mdev->unused_spare_tle/mdev->tconn->unused_spare_tle/g' \
       -e 's/mdev->newest_tle/mdev->tconn->newest_tle/g' \
       -e 's/mdev->oldest_tle/mdev->tconn->oldest_tle/g' \
       -e 's/mdev->out_of_sequence_requests/mdev->tconn->out_of_sequence_requests/g' \
       *.[ch]

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
This commit is contained in:
Philipp Reisner 2011-01-19 14:16:30 +01:00
parent 31890f4ab2
commit 87eeee41f8
7 changed files with 170 additions and 170 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/block/drbd/drbd_int.h
View File

@ -976,6 +976,12 @@ struct drbd_tconn { /* is a resource from the config file */
unsigned long last_received; /* in jiffies, either socket */ unsigned long last_received; /* in jiffies, either socket */
unsigned int ko_count; unsigned int ko_count;
spinlock_t req_lock;
struct drbd_tl_epoch *unused_spare_tle; /* for pre-allocation */
struct drbd_tl_epoch *newest_tle;
struct drbd_tl_epoch *oldest_tle;
struct list_head out_of_sequence_requests;
struct drbd_thread receiver; struct drbd_thread receiver;
struct drbd_thread worker; struct drbd_thread worker;
struct drbd_thread asender; struct drbd_thread asender;
@ -1031,12 +1037,6 @@ struct drbd_conf {
atomic_t unacked_cnt; /* Need to send replys for */ atomic_t unacked_cnt; /* Need to send replys for */
atomic_t local_cnt; /* Waiting for local completion */ atomic_t local_cnt; /* Waiting for local completion */
spinlock_t req_lock;
struct drbd_tl_epoch *unused_spare_tle; /* for pre-allocation */
struct drbd_tl_epoch *newest_tle;
struct drbd_tl_epoch *oldest_tle;
struct list_head out_of_sequence_requests;
/* Interval tree of pending local requests */ /* Interval tree of pending local requests */
struct rb_root read_requests; struct rb_root read_requests;
struct rb_root write_requests; struct rb_root write_requests;
@ -1868,9 +1868,9 @@ static inline void drbd_chk_io_error_(struct drbd_conf *mdev,
{ {
if (error) { if (error) {
unsigned long flags; unsigned long flags;
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
__drbd_chk_io_error_(mdev, forcedetach, where); __drbd_chk_io_error_(mdev, forcedetach, where);
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
} }
} }
@ -2366,11 +2366,11 @@ static inline bool inc_ap_bio_cond(struct drbd_conf *mdev, int count)
{ {
bool rv = false; bool rv = false;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
rv = may_inc_ap_bio(mdev); rv = may_inc_ap_bio(mdev);
if (rv) if (rv)
atomic_add(count, &mdev->ap_bio_cnt); atomic_add(count, &mdev->ap_bio_cnt);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
return rv; return rv;
} }

100
drivers/block/drbd/drbd_main.c
View File

@ -185,7 +185,7 @@ int _get_ldev_if_state(struct drbd_conf *mdev, enum drbd_disk_state mins)
* DOC: The transfer log * DOC: The transfer log
* *
* The transfer log is a single linked list of &struct drbd_tl_epoch objects. * The transfer log is a single linked list of &struct drbd_tl_epoch objects.
* mdev->newest_tle points to the head, mdev->oldest_tle points to the tail * mdev->tconn->newest_tle points to the head, mdev->tconn->oldest_tle points to the tail
* of the list. There is always at least one &struct drbd_tl_epoch object. * of the list. There is always at least one &struct drbd_tl_epoch object.
* *
* Each &struct drbd_tl_epoch has a circular double linked list of requests * Each &struct drbd_tl_epoch has a circular double linked list of requests
@ -206,21 +206,21 @@ static int tl_init(struct drbd_conf *mdev)
b->n_writes = 0; b->n_writes = 0;
b->w.cb = NULL; /* if this is != NULL, we need to dec_ap_pending in tl_clear */ b->w.cb = NULL; /* if this is != NULL, we need to dec_ap_pending in tl_clear */
mdev->oldest_tle = b; mdev->tconn->oldest_tle = b;
mdev->newest_tle = b; mdev->tconn->newest_tle = b;
INIT_LIST_HEAD(&mdev->out_of_sequence_requests); INIT_LIST_HEAD(&mdev->tconn->out_of_sequence_requests);
return 1; return 1;
} }
static void tl_cleanup(struct drbd_conf *mdev) static void tl_cleanup(struct drbd_conf *mdev)
{ {
D_ASSERT(mdev->oldest_tle == mdev->newest_tle); D_ASSERT(mdev->tconn->oldest_tle == mdev->tconn->newest_tle);
D_ASSERT(list_empty(&mdev->out_of_sequence_requests)); D_ASSERT(list_empty(&mdev->tconn->out_of_sequence_requests));
kfree(mdev->oldest_tle); kfree(mdev->tconn->oldest_tle);
mdev->oldest_tle = NULL; mdev->tconn->oldest_tle = NULL;
kfree(mdev->unused_spare_tle); kfree(mdev->tconn->unused_spare_tle);
mdev->unused_spare_tle = NULL; mdev->tconn->unused_spare_tle = NULL;
} }
/** /**
@ -240,13 +240,13 @@ void _tl_add_barrier(struct drbd_conf *mdev, struct drbd_tl_epoch *new)
new->next = NULL; new->next = NULL;
new->n_writes = 0; new->n_writes = 0;
newest_before = mdev->newest_tle; newest_before = mdev->tconn->newest_tle;
/* never send a barrier number == 0, because that is special-cased /* never send a barrier number == 0, because that is special-cased
* when using TCQ for our write ordering code */ * when using TCQ for our write ordering code */
new->br_number = (newest_before->br_number+1) ?: 1; new->br_number = (newest_before->br_number+1) ?: 1;
if (mdev->newest_tle != new) { if (mdev->tconn->newest_tle != new) {
mdev->newest_tle->next = new; mdev->tconn->newest_tle->next = new;
mdev->newest_tle = new; mdev->tconn->newest_tle = new;
} }
} }
@ -267,9 +267,9 @@ void tl_release(struct drbd_conf *mdev, unsigned int barrier_nr,
struct list_head *le, *tle; struct list_head *le, *tle;
struct drbd_request *r; struct drbd_request *r;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
b = mdev->oldest_tle; b = mdev->tconn->oldest_tle;
/* first some paranoia code */ /* first some paranoia code */
if (b == NULL) { if (b == NULL) {
@ -312,22 +312,22 @@ void tl_release(struct drbd_conf *mdev, unsigned int barrier_nr,
if (test_and_clear_bit(CREATE_BARRIER, &mdev->flags)) { if (test_and_clear_bit(CREATE_BARRIER, &mdev->flags)) {
_tl_add_barrier(mdev, b); _tl_add_barrier(mdev, b);
if (nob) if (nob)
mdev->oldest_tle = nob; mdev->tconn->oldest_tle = nob;
/* if nob == NULL b was the only barrier, and becomes the new /* if nob == NULL b was the only barrier, and becomes the new
barrier. Therefore mdev->oldest_tle points already to b */ barrier. Therefore mdev->tconn->oldest_tle points already to b */
} else { } else {
D_ASSERT(nob != NULL); D_ASSERT(nob != NULL);
mdev->oldest_tle = nob; mdev->tconn->oldest_tle = nob;
kfree(b); kfree(b);
} }
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
dec_ap_pending(mdev); dec_ap_pending(mdev);
return; return;
bail: bail:
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
drbd_force_state(mdev, NS(conn, C_PROTOCOL_ERROR)); drbd_force_state(mdev, NS(conn, C_PROTOCOL_ERROR));
} }
@ -347,8 +347,8 @@ static void _tl_restart(struct drbd_conf *mdev, enum drbd_req_event what)
struct drbd_request *req; struct drbd_request *req;
int rv, n_writes, n_reads; int rv, n_writes, n_reads;
b = mdev->oldest_tle; b = mdev->tconn->oldest_tle;
pn = &mdev->oldest_tle; pn = &mdev->tconn->oldest_tle;
while (b) { while (b) {
n_writes = 0; n_writes = 0;
n_reads = 0; n_reads = 0;
@ -387,7 +387,7 @@ static void _tl_restart(struct drbd_conf *mdev, enum drbd_req_event what)
if (b->w.cb != NULL) if (b->w.cb != NULL)
dec_ap_pending(mdev); dec_ap_pending(mdev);
if (b == mdev->newest_tle) { if (b == mdev->tconn->newest_tle) {
/* recycle, but reinit! */ /* recycle, but reinit! */
D_ASSERT(tmp == NULL); D_ASSERT(tmp == NULL);
INIT_LIST_HEAD(&b->requests); INIT_LIST_HEAD(&b->requests);
@ -422,15 +422,15 @@ void tl_clear(struct drbd_conf *mdev)
struct list_head *le, *tle; struct list_head *le, *tle;
struct drbd_request *r; struct drbd_request *r;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
_tl_restart(mdev, CONNECTION_LOST_WHILE_PENDING); _tl_restart(mdev, CONNECTION_LOST_WHILE_PENDING);
/* we expect this list to be empty. */ /* we expect this list to be empty. */
D_ASSERT(list_empty(&mdev->out_of_sequence_requests)); D_ASSERT(list_empty(&mdev->tconn->out_of_sequence_requests));
/* but just in case, clean it up anyways! */ /* but just in case, clean it up anyways! */
list_for_each_safe(le, tle, &mdev->out_of_sequence_requests) { list_for_each_safe(le, tle, &mdev->tconn->out_of_sequence_requests) {
r = list_entry(le, struct drbd_request, tl_requests); r = list_entry(le, struct drbd_request, tl_requests);
/* It would be nice to complete outside of spinlock. /* It would be nice to complete outside of spinlock.
* But this is easier for now. */ * But this is easier for now. */
@ -440,14 +440,14 @@ void tl_clear(struct drbd_conf *mdev)
/* ensure bit indicating barrier is required is clear */ /* ensure bit indicating barrier is required is clear */
clear_bit(CREATE_BARRIER, &mdev->flags); clear_bit(CREATE_BARRIER, &mdev->flags);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
} }
void tl_restart(struct drbd_conf *mdev, enum drbd_req_event what) void tl_restart(struct drbd_conf *mdev, enum drbd_req_event what)
{ {
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
_tl_restart(mdev, what); _tl_restart(mdev, what);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
} }
/** /**
@ -476,12 +476,12 @@ drbd_change_state(struct drbd_conf *mdev, enum chg_state_flags f,
union drbd_state os, ns; union drbd_state os, ns;
enum drbd_state_rv rv; enum drbd_state_rv rv;
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
os = mdev->state; os = mdev->state;
ns.i = (os.i & ~mask.i) | val.i; ns.i = (os.i & ~mask.i) | val.i;
rv = _drbd_set_state(mdev, ns, f, NULL); rv = _drbd_set_state(mdev, ns, f, NULL);
ns = mdev->state; ns = mdev->state;
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
return rv; return rv;
} }
@ -522,7 +522,7 @@ _req_st_cond(struct drbd_conf *mdev, union drbd_state mask,
return SS_CW_FAILED_BY_PEER; return SS_CW_FAILED_BY_PEER;
rv = 0; rv = 0;
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
os = mdev->state; os = mdev->state;
ns.i = (os.i & ~mask.i) | val.i; ns.i = (os.i & ~mask.i) | val.i;
ns = sanitize_state(mdev, os, ns, NULL); ns = sanitize_state(mdev, os, ns, NULL);
@ -537,7 +537,7 @@ _req_st_cond(struct drbd_conf *mdev, union drbd_state mask,
rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */ rv = SS_UNKNOWN_ERROR; /* cont waiting, otherwise fail. */
} }
} }
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
return rv; return rv;
} }
@ -566,7 +566,7 @@ drbd_req_state(struct drbd_conf *mdev, union drbd_state mask,
if (f & CS_SERIALIZE) if (f & CS_SERIALIZE)
mutex_lock(&mdev->state_mutex); mutex_lock(&mdev->state_mutex);
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
os = mdev->state; os = mdev->state;
ns.i = (os.i & ~mask.i) | val.i; ns.i = (os.i & ~mask.i) | val.i;
ns = sanitize_state(mdev, os, ns, NULL); ns = sanitize_state(mdev, os, ns, NULL);
@ -575,7 +575,7 @@ drbd_req_state(struct drbd_conf *mdev, union drbd_state mask,
rv = is_valid_state(mdev, ns); rv = is_valid_state(mdev, ns);
if (rv == SS_SUCCESS) if (rv == SS_SUCCESS)
rv = is_valid_state_transition(mdev, ns, os); rv = is_valid_state_transition(mdev, ns, os);
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
if (rv < SS_SUCCESS) { if (rv < SS_SUCCESS) {
if (f & CS_VERBOSE) if (f & CS_VERBOSE)
@ -601,7 +601,7 @@ drbd_req_state(struct drbd_conf *mdev, union drbd_state mask,
print_st_err(mdev, os, ns, rv); print_st_err(mdev, os, ns, rv);
goto abort; goto abort;
} }
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
os = mdev->state; os = mdev->state;
ns.i = (os.i & ~mask.i) | val.i; ns.i = (os.i & ~mask.i) | val.i;
rv = _drbd_set_state(mdev, ns, f, &done); rv = _drbd_set_state(mdev, ns, f, &done);
@ -610,7 +610,7 @@ drbd_req_state(struct drbd_conf *mdev, union drbd_state mask,
rv = _drbd_set_state(mdev, ns, f, &done); rv = _drbd_set_state(mdev, ns, f, &done);
} }
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
if (f & CS_WAIT_COMPLETE && rv == SS_SUCCESS) { if (f & CS_WAIT_COMPLETE && rv == SS_SUCCESS) {
D_ASSERT(current != mdev->tconn->worker.task); D_ASSERT(current != mdev->tconn->worker.task);
@ -1367,9 +1367,9 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
drbd_uuid_new_current(mdev); drbd_uuid_new_current(mdev);
clear_bit(NEW_CUR_UUID, &mdev->flags); clear_bit(NEW_CUR_UUID, &mdev->flags);
} }
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
_drbd_set_state(_NS(mdev, susp_fen, 0), CS_VERBOSE, NULL); _drbd_set_state(_NS(mdev, susp_fen, 0), CS_VERBOSE, NULL);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
} }
/* case2: The connection was established again: */ /* case2: The connection was established again: */
if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) { if (os.conn < C_CONNECTED && ns.conn >= C_CONNECTED) {
@ -1380,11 +1380,11 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os,
} }
if (what != NOTHING) { if (what != NOTHING) {
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
_tl_restart(mdev, what); _tl_restart(mdev, what);
nsm.i &= mdev->state.i; nsm.i &= mdev->state.i;
_drbd_set_state(mdev, nsm, CS_VERBOSE, NULL); _drbd_set_state(mdev, nsm, CS_VERBOSE, NULL);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
} }
/* Became sync source. With protocol >= 96, we still need to send out /* Became sync source. With protocol >= 96, we still need to send out
@ -2898,7 +2898,7 @@ static int drbd_open(struct block_device *bdev, fmode_t mode)
int rv = 0; int rv = 0;
mutex_lock(&drbd_main_mutex); mutex_lock(&drbd_main_mutex);
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
/* to have a stable mdev->state.role /* to have a stable mdev->state.role
* and no race with updating open_cnt */ * and no race with updating open_cnt */
@ -2911,7 +2911,7 @@ static int drbd_open(struct block_device *bdev, fmode_t mode)
if (!rv) if (!rv)
mdev->open_cnt++; mdev->open_cnt++;
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
mutex_unlock(&drbd_main_mutex); mutex_unlock(&drbd_main_mutex);
return rv; return rv;
@ -2990,7 +2990,7 @@ void drbd_init_set_defaults(struct drbd_conf *mdev)
spin_lock_init(&mdev->tconn->meta.work.q_lock); spin_lock_init(&mdev->tconn->meta.work.q_lock);
spin_lock_init(&mdev->al_lock); spin_lock_init(&mdev->al_lock);
spin_lock_init(&mdev->req_lock); spin_lock_init(&mdev->tconn->req_lock);
spin_lock_init(&mdev->peer_seq_lock); spin_lock_init(&mdev->peer_seq_lock);
spin_lock_init(&mdev->epoch_lock); spin_lock_init(&mdev->epoch_lock);
@ -3451,7 +3451,7 @@ struct drbd_conf *drbd_new_device(unsigned int minor)
blk_queue_max_hw_sectors(q, DRBD_MAX_BIO_SIZE_SAFE >> 8); blk_queue_max_hw_sectors(q, DRBD_MAX_BIO_SIZE_SAFE >> 8);
blk_queue_bounce_limit(q, BLK_BOUNCE_ANY); blk_queue_bounce_limit(q, BLK_BOUNCE_ANY);
blk_queue_merge_bvec(q, drbd_merge_bvec); blk_queue_merge_bvec(q, drbd_merge_bvec);
q->queue_lock = &mdev->req_lock; q->queue_lock = &mdev->tconn->req_lock; /* needed since we use */
mdev->md_io_page = alloc_page(GFP_KERNEL); mdev->md_io_page = alloc_page(GFP_KERNEL);
if (!mdev->md_io_page) if (!mdev->md_io_page)
@ -3784,14 +3784,14 @@ int drbd_md_read(struct drbd_conf *mdev, struct drbd_backing_dev *bdev)
mdev->sync_conf.al_extents = be32_to_cpu(buffer->al_nr_extents); mdev->sync_conf.al_extents = be32_to_cpu(buffer->al_nr_extents);
bdev->md.device_uuid = be64_to_cpu(buffer->device_uuid); bdev->md.device_uuid = be64_to_cpu(buffer->device_uuid);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (mdev->state.conn < C_CONNECTED) { if (mdev->state.conn < C_CONNECTED) {
int peer; int peer;
peer = be32_to_cpu(buffer->la_peer_max_bio_size); peer = be32_to_cpu(buffer->la_peer_max_bio_size);
peer = max_t(int, peer, DRBD_MAX_BIO_SIZE_SAFE); peer = max_t(int, peer, DRBD_MAX_BIO_SIZE_SAFE);
mdev->peer_max_bio_size = peer; mdev->peer_max_bio_size = peer;
} }
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (mdev->sync_conf.al_extents < 7) if (mdev->sync_conf.al_extents < 7)
mdev->sync_conf.al_extents = 127; mdev->sync_conf.al_extents = 127;
@ -4046,13 +4046,13 @@ void drbd_queue_bitmap_io(struct drbd_conf *mdev,
mdev->bm_io_work.why = why; mdev->bm_io_work.why = why;
mdev->bm_io_work.flags = flags; mdev->bm_io_work.flags = flags;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
set_bit(BITMAP_IO, &mdev->flags); set_bit(BITMAP_IO, &mdev->flags);
if (atomic_read(&mdev->ap_bio_cnt) == 0) { if (atomic_read(&mdev->ap_bio_cnt) == 0) {
if (!test_and_set_bit(BITMAP_IO_QUEUED, &mdev->flags)) if (!test_and_set_bit(BITMAP_IO_QUEUED, &mdev->flags))
drbd_queue_work(&mdev->tconn->data.work, &mdev->bm_io_work.w); drbd_queue_work(&mdev->tconn->data.work, &mdev->bm_io_work.w);
} }
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
} }
/** /**

34
drivers/block/drbd/drbd_nl.c
View File

@ -287,13 +287,13 @@ static int _try_outdate_peer_async(void *data)
pdsk == D_INCONSISTENT while conn >= C_CONNECTED is valid, pdsk == D_INCONSISTENT while conn >= C_CONNECTED is valid,
therefore we have to have the pre state change check here. therefore we have to have the pre state change check here.
*/ */
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
ns = mdev->state; ns = mdev->state;
if (ns.conn < C_WF_REPORT_PARAMS) { if (ns.conn < C_WF_REPORT_PARAMS) {
ns.pdsk = nps; ns.pdsk = nps;
_drbd_set_state(mdev, ns, CS_VERBOSE, NULL); _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
} }
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
return 0; return 0;
} }
@ -884,7 +884,7 @@ static void drbd_reconfig_start(struct drbd_conf *mdev)
* wakes potential waiters */ * wakes potential waiters */
static void drbd_reconfig_done(struct drbd_conf *mdev) static void drbd_reconfig_done(struct drbd_conf *mdev)
{ {
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (mdev->state.disk == D_DISKLESS && if (mdev->state.disk == D_DISKLESS &&
mdev->state.conn == C_STANDALONE && mdev->state.conn == C_STANDALONE &&
mdev->state.role == R_SECONDARY) { mdev->state.role == R_SECONDARY) {
@ -892,7 +892,7 @@ static void drbd_reconfig_done(struct drbd_conf *mdev)
drbd_thread_stop_nowait(&mdev->tconn->worker); drbd_thread_stop_nowait(&mdev->tconn->worker);
} else } else
clear_bit(CONFIG_PENDING, &mdev->flags); clear_bit(CONFIG_PENDING, &mdev->flags);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
wake_up(&mdev->state_wait); wake_up(&mdev->state_wait);
} }
@ -909,11 +909,11 @@ static void drbd_suspend_al(struct drbd_conf *mdev)
return; return;
} }
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (mdev->state.conn < C_CONNECTED) if (mdev->state.conn < C_CONNECTED)
s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags); s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (s) if (s)
dev_info(DEV, "Suspended AL updates\n"); dev_info(DEV, "Suspended AL updates\n");
@ -1240,7 +1240,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev)) if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev))
drbd_suspend_al(mdev); /* IO is still suspended here... */ drbd_suspend_al(mdev); /* IO is still suspended here... */
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
os = mdev->state; os = mdev->state;
ns.i = os.i; ns.i = os.i;
/* If MDF_CONSISTENT is not set go into inconsistent state, /* If MDF_CONSISTENT is not set go into inconsistent state,
@ -1285,7 +1285,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp
rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
ns = mdev->state; ns = mdev->state;
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (rv < SS_SUCCESS) if (rv < SS_SUCCESS)
goto force_diskless_dec; goto force_diskless_dec;
@ -1521,10 +1521,10 @@ static int drbd_nl_net_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
} }
drbd_flush_workqueue(mdev); drbd_flush_workqueue(mdev);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (mdev->tconn->net_conf != NULL) { if (mdev->tconn->net_conf != NULL) {
retcode = ERR_NET_CONFIGURED; retcode = ERR_NET_CONFIGURED;
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
goto fail; goto fail;
} }
mdev->tconn->net_conf = new_conf; mdev->tconn->net_conf = new_conf;
@ -1548,7 +1548,7 @@ static int drbd_nl_net_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
mdev->int_dig_in=int_dig_in; mdev->int_dig_in=int_dig_in;
mdev->int_dig_vv=int_dig_vv; mdev->int_dig_vv=int_dig_vv;
retcode = _drbd_set_state(_NS(mdev, conn, C_UNCONNECTED), CS_VERBOSE, NULL); retcode = _drbd_set_state(_NS(mdev, conn, C_UNCONNECTED), CS_VERBOSE, NULL);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
reply->ret_code = retcode; reply->ret_code = retcode;
@ -1582,10 +1582,10 @@ static int drbd_nl_disconnect(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
} }
if (dc.force) { if (dc.force) {
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (mdev->state.conn >= C_WF_CONNECTION) if (mdev->state.conn >= C_WF_CONNECTION)
_drbd_set_state(_NS(mdev, conn, C_DISCONNECTING), CS_HARD, NULL); _drbd_set_state(_NS(mdev, conn, C_DISCONNECTING), CS_HARD, NULL);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
goto done; goto done;
} }
@ -1917,10 +1917,10 @@ static int drbd_nl_invalidate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T));
while (retcode == SS_NEED_CONNECTION) { while (retcode == SS_NEED_CONNECTION) {
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (mdev->state.conn < C_CONNECTED) if (mdev->state.conn < C_CONNECTED)
retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL); retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (retcode != SS_NEED_CONNECTION) if (retcode != SS_NEED_CONNECTION)
break; break;
@ -2193,10 +2193,10 @@ static int drbd_nl_new_c_uuid(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl
drbd_send_uuids_skip_initial_sync(mdev); drbd_send_uuids_skip_initial_sync(mdev);
_drbd_uuid_set(mdev, UI_BITMAP, 0); _drbd_uuid_set(mdev, UI_BITMAP, 0);
drbd_print_uuids(mdev, "cleared bitmap UUID"); drbd_print_uuids(mdev, "cleared bitmap UUID");
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
_drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE), _drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE),
CS_VERBOSE, NULL); CS_VERBOSE, NULL);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
} }
} }

96
drivers/block/drbd/drbd_receiver.c
View File

@ -210,9 +210,9 @@ static void drbd_kick_lo_and_reclaim_net(struct drbd_conf *mdev)
LIST_HEAD(reclaimed); LIST_HEAD(reclaimed);
struct drbd_epoch_entry *e, *t; struct drbd_epoch_entry *e, *t;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
reclaim_net_ee(mdev, &reclaimed); reclaim_net_ee(mdev, &reclaimed);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
list_for_each_entry_safe(e, t, &reclaimed, w.list) list_for_each_entry_safe(e, t, &reclaimed, w.list)
drbd_free_net_ee(mdev, e); drbd_free_net_ee(mdev, e);
@ -269,7 +269,7 @@ static struct page *drbd_pp_alloc(struct drbd_conf *mdev, unsigned number, bool
} }
/* Must not be used from irq, as that may deadlock: see drbd_pp_alloc. /* Must not be used from irq, as that may deadlock: see drbd_pp_alloc.
* Is also used from inside an other spin_lock_irq(&mdev->req_lock); * Is also used from inside an other spin_lock_irq(&mdev->tconn->req_lock);
* Either links the page chain back to the global pool, * Either links the page chain back to the global pool,
* or returns all pages to the system. */ * or returns all pages to the system. */
static void drbd_pp_free(struct drbd_conf *mdev, struct page *page, int is_net) static void drbd_pp_free(struct drbd_conf *mdev, struct page *page, int is_net)
@ -371,9 +371,9 @@ int drbd_release_ee(struct drbd_conf *mdev, struct list_head *list)
int count = 0; int count = 0;
int is_net = list == &mdev->net_ee; int is_net = list == &mdev->net_ee;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
list_splice_init(list, &work_list); list_splice_init(list, &work_list);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
list_for_each_entry_safe(e, t, &work_list, w.list) { list_for_each_entry_safe(e, t, &work_list, w.list) {
drbd_free_some_ee(mdev, e, is_net); drbd_free_some_ee(mdev, e, is_net);
@ -399,10 +399,10 @@ static int drbd_process_done_ee(struct drbd_conf *mdev)
struct drbd_epoch_entry *e, *t; struct drbd_epoch_entry *e, *t;
int ok = (mdev->state.conn >= C_WF_REPORT_PARAMS); int ok = (mdev->state.conn >= C_WF_REPORT_PARAMS);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
reclaim_net_ee(mdev, &reclaimed); reclaim_net_ee(mdev, &reclaimed);
list_splice_init(&mdev->done_ee, &work_list); list_splice_init(&mdev->done_ee, &work_list);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
list_for_each_entry_safe(e, t, &reclaimed, w.list) list_for_each_entry_safe(e, t, &reclaimed, w.list)
drbd_free_net_ee(mdev, e); drbd_free_net_ee(mdev, e);
@ -429,18 +429,18 @@ void _drbd_wait_ee_list_empty(struct drbd_conf *mdev, struct list_head *head)
* and calling prepare_to_wait in the fast path */ * and calling prepare_to_wait in the fast path */
while (!list_empty(head)) { while (!list_empty(head)) {
prepare_to_wait(&mdev->ee_wait, &wait, TASK_UNINTERRUPTIBLE); prepare_to_wait(&mdev->ee_wait, &wait, TASK_UNINTERRUPTIBLE);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
io_schedule(); io_schedule();
finish_wait(&mdev->ee_wait, &wait); finish_wait(&mdev->ee_wait, &wait);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
} }
} }
void drbd_wait_ee_list_empty(struct drbd_conf *mdev, struct list_head *head) void drbd_wait_ee_list_empty(struct drbd_conf *mdev, struct list_head *head)
{ {
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
_drbd_wait_ee_list_empty(mdev, head); _drbd_wait_ee_list_empty(mdev, head);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
} }
/* see also kernel_accept; which is only present since 2.6.18. /* see also kernel_accept; which is only present since 2.6.18.
@ -1452,9 +1452,9 @@ static int recv_resync_read(struct drbd_conf *mdev, sector_t sector, int data_si
e->w.cb = e_end_resync_block; e->w.cb = e_end_resync_block;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
list_add(&e->w.list, &mdev->sync_ee); list_add(&e->w.list, &mdev->sync_ee);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
atomic_add(data_size >> 9, &mdev->rs_sect_ev); atomic_add(data_size >> 9, &mdev->rs_sect_ev);
if (drbd_submit_ee(mdev, e, WRITE, DRBD_FAULT_RS_WR) == 0) if (drbd_submit_ee(mdev, e, WRITE, DRBD_FAULT_RS_WR) == 0)
@ -1462,9 +1462,9 @@ static int recv_resync_read(struct drbd_conf *mdev, sector_t sector, int data_si
/* don't care for the reason here */ /* don't care for the reason here */
dev_err(DEV, "submit failed, triggering re-connect\n"); dev_err(DEV, "submit failed, triggering re-connect\n");
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
list_del(&e->w.list); list_del(&e->w.list);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
drbd_free_ee(mdev, e); drbd_free_ee(mdev, e);
fail: fail:
@ -1498,9 +1498,9 @@ static int receive_DataReply(struct drbd_conf *mdev, enum drbd_packets cmd, unsi
sector = be64_to_cpu(p->sector); sector = be64_to_cpu(p->sector);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
req = find_request(mdev, &mdev->read_requests, p->block_id, sector, false, __func__); req = find_request(mdev, &mdev->read_requests, p->block_id, sector, false, __func__);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (unlikely(!req)) if (unlikely(!req))
return false; return false;
@ -1574,11 +1574,11 @@ static int e_end_block(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
/* we delete from the conflict detection hash _after_ we sent out the /* we delete from the conflict detection hash _after_ we sent out the
* P_WRITE_ACK / P_NEG_ACK, to get the sequence number right. */ * P_WRITE_ACK / P_NEG_ACK, to get the sequence number right. */
if (mdev->tconn->net_conf->two_primaries) { if (mdev->tconn->net_conf->two_primaries) {
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
D_ASSERT(!drbd_interval_empty(&e->i)); D_ASSERT(!drbd_interval_empty(&e->i));
drbd_remove_interval(&mdev->epoch_entries, &e->i); drbd_remove_interval(&mdev->epoch_entries, &e->i);
drbd_clear_interval(&e->i); drbd_clear_interval(&e->i);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
} else } else
D_ASSERT(drbd_interval_empty(&e->i)); D_ASSERT(drbd_interval_empty(&e->i));
@ -1595,11 +1595,11 @@ static int e_send_discard_ack(struct drbd_conf *mdev, struct drbd_work *w, int u
D_ASSERT(mdev->tconn->net_conf->wire_protocol == DRBD_PROT_C); D_ASSERT(mdev->tconn->net_conf->wire_protocol == DRBD_PROT_C);
ok = drbd_send_ack(mdev, P_DISCARD_ACK, e); ok = drbd_send_ack(mdev, P_DISCARD_ACK, e);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
D_ASSERT(!drbd_interval_empty(&e->i)); D_ASSERT(!drbd_interval_empty(&e->i));
drbd_remove_interval(&mdev->epoch_entries, &e->i); drbd_remove_interval(&mdev->epoch_entries, &e->i);
drbd_clear_interval(&e->i); drbd_clear_interval(&e->i);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
dec_unacked(mdev); dec_unacked(mdev);
@ -1718,7 +1718,7 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
/* I'm the receiver, I do hold a net_cnt reference. */ /* I'm the receiver, I do hold a net_cnt reference. */
if (!mdev->tconn->net_conf->two_primaries) { if (!mdev->tconn->net_conf->two_primaries) {
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
} else { } else {
/* don't get the req_lock yet, /* don't get the req_lock yet,
* we may sleep in drbd_wait_peer_seq */ * we may sleep in drbd_wait_peer_seq */
@ -1765,7 +1765,7 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
if (drbd_wait_peer_seq(mdev, be32_to_cpu(p->seq_num))) if (drbd_wait_peer_seq(mdev, be32_to_cpu(p->seq_num)))
goto out_interrupted; goto out_interrupted;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
drbd_insert_interval(&mdev->epoch_entries, &e->i); drbd_insert_interval(&mdev->epoch_entries, &e->i);
@ -1805,7 +1805,7 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
e->w.cb = e_send_discard_ack; e->w.cb = e_send_discard_ack;
list_add_tail(&e->w.list, &mdev->done_ee); list_add_tail(&e->w.list, &mdev->done_ee);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
/* we could probably send that P_DISCARD_ACK ourselves, /* we could probably send that P_DISCARD_ACK ourselves,
* but I don't like the receiver using the msock */ * but I don't like the receiver using the msock */
@ -1820,13 +1820,13 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
drbd_remove_interval(&mdev->epoch_entries, &e->i); drbd_remove_interval(&mdev->epoch_entries, &e->i);
drbd_clear_interval(&e->i); drbd_clear_interval(&e->i);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
finish_wait(&mdev->misc_wait, &wait); finish_wait(&mdev->misc_wait, &wait);
goto out_interrupted; goto out_interrupted;
} }
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (first) { if (first) {
first = 0; first = 0;
dev_alert(DEV, "Concurrent write! [W AFTERWARDS] " dev_alert(DEV, "Concurrent write! [W AFTERWARDS] "
@ -1837,13 +1837,13 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
D_ASSERT(have_unacked == 0); D_ASSERT(have_unacked == 0);
} }
schedule(); schedule();
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
} }
finish_wait(&mdev->misc_wait, &wait); finish_wait(&mdev->misc_wait, &wait);
} }
list_add(&e->w.list, &mdev->active_ee); list_add(&e->w.list, &mdev->active_ee);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
switch (mdev->tconn->net_conf->wire_protocol) { switch (mdev->tconn->net_conf->wire_protocol) {
case DRBD_PROT_C: case DRBD_PROT_C:
@ -1874,11 +1874,11 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
/* don't care for the reason here */ /* don't care for the reason here */
dev_err(DEV, "submit failed, triggering re-connect\n"); dev_err(DEV, "submit failed, triggering re-connect\n");
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
list_del(&e->w.list); list_del(&e->w.list);
drbd_remove_interval(&mdev->epoch_entries, &e->i); drbd_remove_interval(&mdev->epoch_entries, &e->i);
drbd_clear_interval(&e->i); drbd_clear_interval(&e->i);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (e->flags & EE_CALL_AL_COMPLETE_IO) if (e->flags & EE_CALL_AL_COMPLETE_IO)
drbd_al_complete_io(mdev, e->i.sector); drbd_al_complete_io(mdev, e->i.sector);
@ -2122,18 +2122,18 @@ submit_for_resync:
submit: submit:
inc_unacked(mdev); inc_unacked(mdev);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
list_add_tail(&e->w.list, &mdev->read_ee); list_add_tail(&e->w.list, &mdev->read_ee);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (drbd_submit_ee(mdev, e, READ, fault_type) == 0) if (drbd_submit_ee(mdev, e, READ, fault_type) == 0)
return true; return true;
/* don't care for the reason here */ /* don't care for the reason here */
dev_err(DEV, "submit failed, triggering re-connect\n"); dev_err(DEV, "submit failed, triggering re-connect\n");
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
list_del(&e->w.list); list_del(&e->w.list);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
/* no drbd_rs_complete_io(), we are dropping the connection anyways */ /* no drbd_rs_complete_io(), we are dropping the connection anyways */
out_free_e: out_free_e:
@ -3183,10 +3183,10 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
dev_info(DEV, "real peer disk state = %s\n", drbd_disk_str(real_peer_disk)); dev_info(DEV, "real peer disk state = %s\n", drbd_disk_str(real_peer_disk));
} }
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
retry: retry:
os = ns = mdev->state; os = ns = mdev->state;
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
/* peer says his disk is uptodate, while we think it is inconsistent, /* peer says his disk is uptodate, while we think it is inconsistent,
* and this happens while we think we have a sync going on. */ * and this happens while we think we have a sync going on. */
@ -3270,7 +3270,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
} }
} }
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (mdev->state.i != os.i) if (mdev->state.i != os.i)
goto retry; goto retry;
clear_bit(CONSIDER_RESYNC, &mdev->flags); clear_bit(CONSIDER_RESYNC, &mdev->flags);
@ -3284,7 +3284,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
test_bit(NEW_CUR_UUID, &mdev->flags)) { test_bit(NEW_CUR_UUID, &mdev->flags)) {
/* Do not allow tl_restart(RESEND) for a rebooted peer. We can only allow this /* Do not allow tl_restart(RESEND) for a rebooted peer. We can only allow this
for temporal network outages! */ for temporal network outages! */
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
dev_err(DEV, "Aborting Connect, can not thaw IO with an only Consistent peer\n"); dev_err(DEV, "Aborting Connect, can not thaw IO with an only Consistent peer\n");
tl_clear(mdev); tl_clear(mdev);
drbd_uuid_new_current(mdev); drbd_uuid_new_current(mdev);
@ -3294,7 +3294,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned
} }
rv = _drbd_set_state(mdev, ns, cs_flags, NULL); rv = _drbd_set_state(mdev, ns, cs_flags, NULL);
ns = mdev->state; ns = mdev->state;
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (rv < SS_SUCCESS) { if (rv < SS_SUCCESS) {
drbd_force_state(mdev, NS(conn, C_DISCONNECTING)); drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
@ -3772,11 +3772,11 @@ static void drbd_disconnect(struct drbd_conf *mdev)
drbd_free_sock(mdev); drbd_free_sock(mdev);
/* wait for current activity to cease. */ /* wait for current activity to cease. */
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
_drbd_wait_ee_list_empty(mdev, &mdev->active_ee); _drbd_wait_ee_list_empty(mdev, &mdev->active_ee);
_drbd_wait_ee_list_empty(mdev, &mdev->sync_ee); _drbd_wait_ee_list_empty(mdev, &mdev->sync_ee);
_drbd_wait_ee_list_empty(mdev, &mdev->read_ee); _drbd_wait_ee_list_empty(mdev, &mdev->read_ee);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
/* We do not have data structures that would allow us to /* We do not have data structures that would allow us to
* get the rs_pending_cnt down to 0 again. * get the rs_pending_cnt down to 0 again.
@ -3828,7 +3828,7 @@ static void drbd_disconnect(struct drbd_conf *mdev)
if (mdev->state.role == R_PRIMARY && fp >= FP_RESOURCE && mdev->state.pdsk >= D_UNKNOWN) if (mdev->state.role == R_PRIMARY && fp >= FP_RESOURCE && mdev->state.pdsk >= D_UNKNOWN)
drbd_try_outdate_peer_async(mdev); drbd_try_outdate_peer_async(mdev);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
os = mdev->state; os = mdev->state;
if (os.conn >= C_UNCONNECTED) { if (os.conn >= C_UNCONNECTED) {
/* Do not restart in case we are C_DISCONNECTING */ /* Do not restart in case we are C_DISCONNECTING */
@ -3836,7 +3836,7 @@ static void drbd_disconnect(struct drbd_conf *mdev)
ns.conn = C_UNCONNECTED; ns.conn = C_UNCONNECTED;
rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL); rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
} }
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (os.conn == C_DISCONNECTING) { if (os.conn == C_DISCONNECTING) {
wait_event(mdev->tconn->net_cnt_wait, atomic_read(&mdev->tconn->net_cnt) == 0); wait_event(mdev->tconn->net_cnt_wait, atomic_read(&mdev->tconn->net_cnt) == 0);
@ -4245,14 +4245,14 @@ validate_req_change_req_state(struct drbd_conf *mdev, u64 id, sector_t sector,
struct drbd_request *req; struct drbd_request *req;
struct bio_and_error m; struct bio_and_error m;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
req = find_request(mdev, root, id, sector, missing_ok, func); req = find_request(mdev, root, id, sector, missing_ok, func);
if (unlikely(!req)) { if (unlikely(!req)) {
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
return false; return false;
} }
__req_mod(req, what, &m); __req_mod(req, what, &m);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (m.bio) if (m.bio)
complete_master_bio(mdev, &m); complete_master_bio(mdev, &m);
@ -4518,9 +4518,9 @@ int drbd_asender(struct drbd_thread *thi)
goto reconnect; goto reconnect;
/* to avoid race with newly queued ACKs */ /* to avoid race with newly queued ACKs */
set_bit(SIGNAL_ASENDER, &mdev->flags); set_bit(SIGNAL_ASENDER, &mdev->flags);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
empty = list_empty(&mdev->done_ee); empty = list_empty(&mdev->done_ee);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
/* new ack may have been queued right here, /* new ack may have been queued right here,
* but then there is also a signal pending, * but then there is also a signal pending,
* and we start over... */ * and we start over... */

48
drivers/block/drbd/drbd_req.c
View File

@ -120,7 +120,7 @@ static void queue_barrier(struct drbd_conf *mdev)
if (test_bit(CREATE_BARRIER, &mdev->flags)) if (test_bit(CREATE_BARRIER, &mdev->flags))
return; return;
b = mdev->newest_tle; b = mdev->tconn->newest_tle;
b->w.cb = w_send_barrier; b->w.cb = w_send_barrier;
/* inc_ap_pending done here, so we won't /* inc_ap_pending done here, so we won't
* get imbalanced on connection loss. * get imbalanced on connection loss.
@ -144,7 +144,7 @@ static void _about_to_complete_local_write(struct drbd_conf *mdev,
*/ */
if (mdev->state.conn >= C_CONNECTED && if (mdev->state.conn >= C_CONNECTED &&
(s & RQ_NET_SENT) != 0 && (s & RQ_NET_SENT) != 0 &&
req->epoch == mdev->newest_tle->br_number) req->epoch == mdev->tconn->newest_tle->br_number)
queue_barrier(mdev); queue_barrier(mdev);
/* we need to do the conflict detection stuff, /* we need to do the conflict detection stuff,
@ -516,10 +516,10 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
* just after it grabs the req_lock */ * just after it grabs the req_lock */
D_ASSERT(test_bit(CREATE_BARRIER, &mdev->flags) == 0); D_ASSERT(test_bit(CREATE_BARRIER, &mdev->flags) == 0);
req->epoch = mdev->newest_tle->br_number; req->epoch = mdev->tconn->newest_tle->br_number;
/* increment size of current epoch */ /* increment size of current epoch */
mdev->newest_tle->n_writes++; mdev->tconn->newest_tle->n_writes++;
/* queue work item to send data */ /* queue work item to send data */
D_ASSERT(req->rq_state & RQ_NET_PENDING); D_ASSERT(req->rq_state & RQ_NET_PENDING);
@ -528,7 +528,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
drbd_queue_work(&mdev->tconn->data.work, &req->w); drbd_queue_work(&mdev->tconn->data.work, &req->w);
/* close the epoch, in case it outgrew the limit */ /* close the epoch, in case it outgrew the limit */
if (mdev->newest_tle->n_writes >= mdev->tconn->net_conf->max_epoch_size) if (mdev->tconn->newest_tle->n_writes >= mdev->tconn->net_conf->max_epoch_size)
queue_barrier(mdev); queue_barrier(mdev);
break; break;
@ -693,7 +693,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
* this is bad, because if the connection is lost now, * this is bad, because if the connection is lost now,
* we won't be able to clean them up... */ * we won't be able to clean them up... */
dev_err(DEV, "FIXME (BARRIER_ACKED but pending)\n"); dev_err(DEV, "FIXME (BARRIER_ACKED but pending)\n");
list_move(&req->tl_requests, &mdev->out_of_sequence_requests); list_move(&req->tl_requests, &mdev->tconn->out_of_sequence_requests);
} }
if ((req->rq_state & RQ_NET_MASK) != 0) { if ((req->rq_state & RQ_NET_MASK) != 0) {
req->rq_state |= RQ_NET_DONE; req->rq_state |= RQ_NET_DONE;
@ -834,7 +834,7 @@ static int drbd_make_request_common(struct drbd_conf *mdev, struct bio *bio, uns
* spinlock, and grabbing the spinlock. * spinlock, and grabbing the spinlock.
* if we lost that race, we retry. */ * if we lost that race, we retry. */
if (rw == WRITE && (remote || send_oos) && if (rw == WRITE && (remote || send_oos) &&
mdev->unused_spare_tle == NULL && mdev->tconn->unused_spare_tle == NULL &&
test_bit(CREATE_BARRIER, &mdev->flags)) { test_bit(CREATE_BARRIER, &mdev->flags)) {
allocate_barrier: allocate_barrier:
b = kmalloc(sizeof(struct drbd_tl_epoch), GFP_NOIO); b = kmalloc(sizeof(struct drbd_tl_epoch), GFP_NOIO);
@ -846,7 +846,7 @@ allocate_barrier:
} }
/* GOOD, everything prepared, grab the spin_lock */ /* GOOD, everything prepared, grab the spin_lock */
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (is_susp(mdev->state)) { if (is_susp(mdev->state)) {
/* If we got suspended, use the retry mechanism of /* If we got suspended, use the retry mechanism of
@ -854,7 +854,7 @@ allocate_barrier:
bio. In the next call to drbd_make_request bio. In the next call to drbd_make_request
we sleep in inc_ap_bio() */ we sleep in inc_ap_bio() */
ret = 1; ret = 1;
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
goto fail_free_complete; goto fail_free_complete;
} }
@ -867,21 +867,21 @@ allocate_barrier:
dev_warn(DEV, "lost connection while grabbing the req_lock!\n"); dev_warn(DEV, "lost connection while grabbing the req_lock!\n");
if (!(local || remote)) { if (!(local || remote)) {
dev_err(DEV, "IO ERROR: neither local nor remote disk\n"); dev_err(DEV, "IO ERROR: neither local nor remote disk\n");
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
goto fail_free_complete; goto fail_free_complete;
} }
} }
if (b && mdev->unused_spare_tle == NULL) { if (b && mdev->tconn->unused_spare_tle == NULL) {
mdev->unused_spare_tle = b; mdev->tconn->unused_spare_tle = b;
b = NULL; b = NULL;
} }
if (rw == WRITE && (remote || send_oos) && if (rw == WRITE && (remote || send_oos) &&
mdev->unused_spare_tle == NULL && mdev->tconn->unused_spare_tle == NULL &&
test_bit(CREATE_BARRIER, &mdev->flags)) { test_bit(CREATE_BARRIER, &mdev->flags)) {
/* someone closed the current epoch /* someone closed the current epoch
* while we were grabbing the spinlock */ * while we were grabbing the spinlock */
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
goto allocate_barrier; goto allocate_barrier;
} }
@ -899,10 +899,10 @@ allocate_barrier:
* barrier packet. To get the write ordering right, we only have to * barrier packet. To get the write ordering right, we only have to
* make sure that, if this is a write request and it triggered a * make sure that, if this is a write request and it triggered a
* barrier packet, this request is queued within the same spinlock. */ * barrier packet, this request is queued within the same spinlock. */
if ((remote || send_oos) && mdev->unused_spare_tle && if ((remote || send_oos) && mdev->tconn->unused_spare_tle &&
test_and_clear_bit(CREATE_BARRIER, &mdev->flags)) { test_and_clear_bit(CREATE_BARRIER, &mdev->flags)) {
_tl_add_barrier(mdev, mdev->unused_spare_tle); _tl_add_barrier(mdev, mdev->tconn->unused_spare_tle);
mdev->unused_spare_tle = NULL; mdev->tconn->unused_spare_tle = NULL;
} else { } else {
D_ASSERT(!(remote && rw == WRITE && D_ASSERT(!(remote && rw == WRITE &&
test_bit(CREATE_BARRIER, &mdev->flags))); test_bit(CREATE_BARRIER, &mdev->flags)));
@ -934,7 +934,7 @@ allocate_barrier:
if (rw == WRITE && _req_conflicts(req)) if (rw == WRITE && _req_conflicts(req))
goto fail_conflicting; goto fail_conflicting;
list_add_tail(&req->tl_requests, &mdev->newest_tle->requests); list_add_tail(&req->tl_requests, &mdev->tconn->newest_tle->requests);
/* NOTE remote first: to get the concurrent write detection right, /* NOTE remote first: to get the concurrent write detection right,
* we must register the request before start of local IO. */ * we must register the request before start of local IO. */
@ -975,7 +975,7 @@ allocate_barrier:
} }
} }
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
kfree(b); /* if someone else has beaten us to it... */ kfree(b); /* if someone else has beaten us to it... */
if (local) { if (local) {
@ -1008,7 +1008,7 @@ fail_conflicting:
* pretend that it was successfully served right now. * pretend that it was successfully served right now.
*/ */
_drbd_end_io_acct(mdev, req); _drbd_end_io_acct(mdev, req);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (remote) if (remote)
dec_ap_pending(mdev); dec_ap_pending(mdev);
/* THINK: do we want to fail it (-EIO), or pretend success? /* THINK: do we want to fail it (-EIO), or pretend success?
@ -1188,10 +1188,10 @@ void request_timer_fn(unsigned long data)
if (!et || mdev->state.conn < C_WF_REPORT_PARAMS) if (!et || mdev->state.conn < C_WF_REPORT_PARAMS)
return; /* Recurring timer stopped */ return; /* Recurring timer stopped */
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
le = &mdev->oldest_tle->requests; le = &mdev->tconn->oldest_tle->requests;
if (list_empty(le)) { if (list_empty(le)) {
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
mod_timer(&mdev->request_timer, jiffies + et); mod_timer(&mdev->request_timer, jiffies + et);
return; return;
} }
@ -1210,5 +1210,5 @@ void request_timer_fn(unsigned long data)
mod_timer(&mdev->request_timer, req->start_time + et); mod_timer(&mdev->request_timer, req->start_time + et);
} }
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
} }

4
drivers/block/drbd/drbd_req.h
View File

@ -305,9 +305,9 @@ static inline int req_mod(struct drbd_request *req,
struct bio_and_error m; struct bio_and_error m;
int rv; int rv;
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
rv = __req_mod(req, what, &m); rv = __req_mod(req, what, &m);
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
if (m.bio) if (m.bio)
complete_master_bio(mdev, &m); complete_master_bio(mdev, &m);

38
drivers/block/drbd/drbd_worker.c
View File

@ -85,14 +85,14 @@ void drbd_endio_read_sec_final(struct drbd_epoch_entry *e) __releases(local)
unsigned long flags = 0; unsigned long flags = 0;
struct drbd_conf *mdev = e->mdev; struct drbd_conf *mdev = e->mdev;
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
mdev->read_cnt += e->i.size >> 9; mdev->read_cnt += e->i.size >> 9;
list_del(&e->w.list); list_del(&e->w.list);
if (list_empty(&mdev->read_ee)) if (list_empty(&mdev->read_ee))
wake_up(&mdev->ee_wait); wake_up(&mdev->ee_wait);
if (test_bit(__EE_WAS_ERROR, &e->flags)) if (test_bit(__EE_WAS_ERROR, &e->flags))
__drbd_chk_io_error(mdev, false); __drbd_chk_io_error(mdev, false);
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
drbd_queue_work(&mdev->tconn->data.work, &e->w); drbd_queue_work(&mdev->tconn->data.work, &e->w);
put_ldev(mdev); put_ldev(mdev);
@ -117,7 +117,7 @@ static void drbd_endio_write_sec_final(struct drbd_epoch_entry *e) __releases(lo
do_al_complete_io = e->flags & EE_CALL_AL_COMPLETE_IO; do_al_complete_io = e->flags & EE_CALL_AL_COMPLETE_IO;
block_id = e->block_id; block_id = e->block_id;
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
mdev->writ_cnt += e->i.size >> 9; mdev->writ_cnt += e->i.size >> 9;
list_del(&e->w.list); /* has been on active_ee or sync_ee */ list_del(&e->w.list); /* has been on active_ee or sync_ee */
list_add_tail(&e->w.list, &mdev->done_ee); list_add_tail(&e->w.list, &mdev->done_ee);
@ -134,7 +134,7 @@ static void drbd_endio_write_sec_final(struct drbd_epoch_entry *e) __releases(lo
if (test_bit(__EE_WAS_ERROR, &e->flags)) if (test_bit(__EE_WAS_ERROR, &e->flags))
__drbd_chk_io_error(mdev, false); __drbd_chk_io_error(mdev, false);
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
if (block_id == ID_SYNCER) if (block_id == ID_SYNCER)
drbd_rs_complete_io(mdev, e_sector); drbd_rs_complete_io(mdev, e_sector);
@ -220,9 +220,9 @@ void drbd_endio_pri(struct bio *bio, int error)
req->private_bio = ERR_PTR(error); req->private_bio = ERR_PTR(error);
/* not req_mod(), we need irqsave here! */ /* not req_mod(), we need irqsave here! */
spin_lock_irqsave(&mdev->req_lock, flags); spin_lock_irqsave(&mdev->tconn->req_lock, flags);
__req_mod(req, what, &m); __req_mod(req, what, &m);
spin_unlock_irqrestore(&mdev->req_lock, flags); spin_unlock_irqrestore(&mdev->tconn->req_lock, flags);
if (m.bio) if (m.bio)
complete_master_bio(mdev, &m); complete_master_bio(mdev, &m);
@ -236,13 +236,13 @@ int w_read_retry_remote(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
* but try to WRITE the P_DATA_REPLY to the failed location, * but try to WRITE the P_DATA_REPLY to the failed location,
* to give the disk the chance to relocate that block */ * to give the disk the chance to relocate that block */
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (cancel || mdev->state.pdsk != D_UP_TO_DATE) { if (cancel || mdev->state.pdsk != D_UP_TO_DATE) {
_req_mod(req, READ_RETRY_REMOTE_CANCELED); _req_mod(req, READ_RETRY_REMOTE_CANCELED);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
return 1; return 1;
} }
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
return w_send_read_req(mdev, w, 0); return w_send_read_req(mdev, w, 0);
} }
@ -359,9 +359,9 @@ static int read_for_csum(struct drbd_conf *mdev, sector_t sector, int size)
goto defer; goto defer;
e->w.cb = w_e_send_csum; e->w.cb = w_e_send_csum;
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
list_add(&e->w.list, &mdev->read_ee); list_add(&e->w.list, &mdev->read_ee);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
atomic_add(size >> 9, &mdev->rs_sect_ev); atomic_add(size >> 9, &mdev->rs_sect_ev);
if (drbd_submit_ee(mdev, e, READ, DRBD_FAULT_RS_RD) == 0) if (drbd_submit_ee(mdev, e, READ, DRBD_FAULT_RS_RD) == 0)
@ -371,9 +371,9 @@ static int read_for_csum(struct drbd_conf *mdev, sector_t sector, int size)
* because bio_add_page failed (probably broken lower level driver), * because bio_add_page failed (probably broken lower level driver),
* retry may or may not help. * retry may or may not help.
* If it does not, you may need to force disconnect. */ * If it does not, you may need to force disconnect. */
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
list_del(&e->w.list); list_del(&e->w.list);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
drbd_free_ee(mdev, e); drbd_free_ee(mdev, e);
defer: defer:
@ -793,7 +793,7 @@ int drbd_resync_finished(struct drbd_conf *mdev)
ping_peer(mdev); ping_peer(mdev);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
os = mdev->state; os = mdev->state;
verify_done = (os.conn == C_VERIFY_S || os.conn == C_VERIFY_T); verify_done = (os.conn == C_VERIFY_S || os.conn == C_VERIFY_T);
@ -882,7 +882,7 @@ int drbd_resync_finished(struct drbd_conf *mdev)
_drbd_set_state(mdev, ns, CS_VERBOSE, NULL); _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
out_unlock: out_unlock:
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
put_ldev(mdev); put_ldev(mdev);
out: out:
mdev->rs_total = 0; mdev->rs_total = 0;
@ -907,9 +907,9 @@ static void move_to_net_ee_or_free(struct drbd_conf *mdev, struct drbd_epoch_ent
int i = (e->i.size + PAGE_SIZE -1) >> PAGE_SHIFT; int i = (e->i.size + PAGE_SIZE -1) >> PAGE_SHIFT;
atomic_add(i, &mdev->pp_in_use_by_net); atomic_add(i, &mdev->pp_in_use_by_net);
atomic_sub(i, &mdev->pp_in_use); atomic_sub(i, &mdev->pp_in_use);
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
list_add_tail(&e->w.list, &mdev->net_ee); list_add_tail(&e->w.list, &mdev->net_ee);
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
wake_up(&drbd_pp_wait); wake_up(&drbd_pp_wait);
} else } else
drbd_free_ee(mdev, e); drbd_free_ee(mdev, e);
@ -1210,10 +1210,10 @@ int w_send_barrier(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
* actually, this race was harmless, since we only try to send the * actually, this race was harmless, since we only try to send the
* barrier packet here, and otherwise do nothing with the object. * barrier packet here, and otherwise do nothing with the object.
* but compare with the head of w_clear_epoch */ * but compare with the head of w_clear_epoch */
spin_lock_irq(&mdev->req_lock); spin_lock_irq(&mdev->tconn->req_lock);
if (w->cb != w_send_barrier || mdev->state.conn < C_CONNECTED) if (w->cb != w_send_barrier || mdev->state.conn < C_CONNECTED)
cancel = 1; cancel = 1;
spin_unlock_irq(&mdev->req_lock); spin_unlock_irq(&mdev->tconn->req_lock);
if (cancel) if (cancel)
return 1; return 1;