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| author | Lars Ellenberg | 2010-10-06 11:46:55 +0200 |
|---|---|---|
| committer | Philipp Reisner | 2010-10-14 18:38:45 +0200 |
| commit | 2b2bf2148fd46874ee72a877c951e5c6675d1caa (patch) | |
| tree | 15ec40dd736c5e7cf833deb61b6770d562fa11b5 /drivers | |
| parent | drbd: Fix regression in recv_bm_rle_bits (compressed bitmap) (diff) | |
| download | kernel-qcow2-linux-2b2bf2148fd46874ee72a877c951e5c6675d1caa.tar.gz kernel-qcow2-linux-2b2bf2148fd46874ee72a877c951e5c6675d1caa.tar.xz kernel-qcow2-linux-2b2bf2148fd46874ee72a877c951e5c6675d1caa.zip | |
drbd: drbd_send_ack_dp must not rely on header information
drbd commit 17c854fea474a5eb3cfa12e4fb019e46debbc4ec
drbd: receiving of big packets, for payloads between 64kByte and 4GByte
introduced a new on-the-wire packet header format. We must no longer
assume either format, but use the result of whatever drbd_recv_header
has decoded.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 2 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 11 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_receiver.c | 4 |
3 files changed, 9 insertions, 8 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index 1680939de101..8ab6fed39539 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -1230,7 +1230,7 @@ extern int drbd_send_ack(struct drbd_conf *mdev, enum drbd_packets cmd, extern int drbd_send_ack_rp(struct drbd_conf *mdev, enum drbd_packets cmd, struct p_block_req *rp); extern int drbd_send_ack_dp(struct drbd_conf *mdev, enum drbd_packets cmd, - struct p_data *dp); + struct p_data *dp, int data_size); extern int drbd_send_ack_ex(struct drbd_conf *mdev, enum drbd_packets cmd, sector_t sector, int blksize, u64 block_id); extern int drbd_send_block(struct drbd_conf *mdev, enum drbd_packets cmd, diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index e1f2c2e54f5f..accb37d1215f 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -2193,13 +2193,14 @@ static int _drbd_send_ack(struct drbd_conf *mdev, enum drbd_packets cmd, return ok; } +/* dp->sector and dp->block_id already/still in network byte order, + * data_size is payload size according to dp->head, + * and may need to be corrected for digest size. */ int drbd_send_ack_dp(struct drbd_conf *mdev, enum drbd_packets cmd, - struct p_data *dp) + struct p_data *dp, int data_size) { - const int header_size = sizeof(struct p_data) - - sizeof(struct p_header80); - int data_size = ((struct p_header80 *)dp)->length - header_size; - + data_size -= (mdev->agreed_pro_version >= 87 && mdev->integrity_r_tfm) ? + crypto_hash_digestsize(mdev->integrity_r_tfm) : 0; return _drbd_send_ack(mdev, cmd, dp->sector, cpu_to_be32(data_size), dp->block_id); } diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index b5d3fa6c7a8b..45a2d610ca1d 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -1630,7 +1630,7 @@ static int receive_RSDataReply(struct drbd_conf *mdev, enum drbd_packets cmd, un ok = drbd_drain_block(mdev, data_size); - drbd_send_ack_dp(mdev, P_NEG_ACK, p); + drbd_send_ack_dp(mdev, P_NEG_ACK, p, data_size); } atomic_add(data_size >> 9, &mdev->rs_sect_in); @@ -1787,7 +1787,7 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packets cmd, unsigned mdev->peer_seq++; spin_unlock(&mdev->peer_seq_lock); - drbd_send_ack_dp(mdev, P_NEG_ACK, p); + drbd_send_ack_dp(mdev, P_NEG_ACK, p, data_size); atomic_inc(&mdev->current_epoch->epoch_size); return drbd_drain_block(mdev, data_size); } |