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drbd: Replaced some casts by an union. Improved comments

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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 2010-07-21 10:20:17 +02:00
parent d207450cf2
commit 85719573dd
3 changed files with 12 additions and 8 deletions
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13
drivers/block/drbd/drbd_int.h
View file

@ -759,7 +759,7 @@ struct digest_info {
struct drbd_epoch_entry {
struct drbd_work w;
struct hlist_node colision;
struct drbd_epoch *epoch;
struct drbd_epoch *epoch; /* for writes */
struct drbd_conf *mdev;
struct page *pages;
atomic_t pending_bios;
@ -767,7 +767,10 @@ struct drbd_epoch_entry {
/* see comments on ee flag bits below */
unsigned long flags;
sector_t sector;
u64 block_id;
union {
u64 block_id;
struct digest_info *digest;
};
};
/* ee flag bits.
@ -1032,10 +1035,10 @@ struct drbd_conf {
spinlock_t epoch_lock;
unsigned int epochs;
enum write_ordering_e write_ordering;
struct list_head active_ee; /* IO in progress */
struct list_head sync_ee; /* IO in progress */
struct list_head active_ee; /* IO in progress (P_DATA gets written to disk) */
struct list_head sync_ee; /* IO in progress (P_RS_DATA_REPLY gets written to disk) */
struct list_head done_ee; /* send ack */
struct list_head read_ee; /* IO in progress */
struct list_head read_ee; /* IO in progress (any read) */
struct list_head net_ee; /* zero-copy network send in progress */
struct hlist_head *ee_hash; /* is proteced by req_lock! */
unsigned int ee_hash_s;

3
drivers/block/drbd/drbd_receiver.c
View file

@ -2097,7 +2097,7 @@ static int receive_DataRequest(struct drbd_conf *mdev, struct p_header *h)
if (drbd_recv(mdev, di->digest, digest_size) != digest_size)
goto out_free_e;
e->block_id = (u64)(unsigned long)di;
e->digest = di;
if (h->command == P_CSUM_RS_REQUEST) {
D_ASSERT(mdev->agreed_pro_version >= 89);
e->w.cb = w_e_end_csum_rs_req;
@ -3769,6 +3769,7 @@ static void drbd_disconnect(struct drbd_conf *mdev)
drbd_thread_stop(&mdev->asender);
drbd_free_sock(mdev);
/* wait for current activity to cease. */
spin_lock_irq(&mdev->req_lock);
_drbd_wait_ee_list_empty(mdev, &mdev->active_ee);
_drbd_wait_ee_list_empty(mdev, &mdev->sync_ee);

4
drivers/block/drbd/drbd_worker.c
View file

@ -1018,7 +1018,7 @@ int w_e_end_csum_rs_req(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
drbd_rs_complete_io(mdev, e->sector);
di = (struct digest_info *)(unsigned long)e->block_id;
di = e->digest;
if (likely((e->flags & EE_WAS_ERROR) == 0)) {
/* quick hack to try to avoid a race against reconfiguration.
@ -1126,7 +1126,7 @@ int w_e_end_ov_reply(struct drbd_conf *mdev, struct drbd_work *w, int cancel)
* the resync lru has been cleaned up already */
drbd_rs_complete_io(mdev, e->sector);
di = (struct digest_info *)(unsigned long)e->block_id;
di = e->digest;
if (likely((e->flags & EE_WAS_ERROR) == 0)) {
digest_size = crypto_hash_digestsize(mdev->verify_tfm);