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Subject[PATCH 13/14] drbd: Pass struct packet_info down to the receive functions
Date
From: Andreas Gruenbacher <agruen@linbit.com>

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
---
drivers/block/drbd/drbd_receiver.c | 150 ++++++++++++++++--------------------
1 files changed, 65 insertions(+), 85 deletions(-)
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 227cddc..856ac23 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -50,8 +50,8 @@

struct packet_info {
enum drbd_packet cmd;
- int size;
- int vnr;
+ unsigned int size;
+ unsigned int vnr;
};

enum finish_epoch {
@@ -1543,8 +1543,7 @@ find_request(struct drbd_conf *mdev, struct rb_root *root, u64 id,
return NULL;
}

-static int receive_DataReply(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_DataReply(struct drbd_conf *mdev, struct packet_info *pi)
{
struct drbd_request *req;
sector_t sector;
@@ -1562,7 +1561,7 @@ static int receive_DataReply(struct drbd_conf *mdev, enum drbd_packet cmd,
/* hlist_del(&req->collision) is done in _req_may_be_done, to avoid
* special casing it there for the various failure cases.
* still no race with drbd_fail_pending_reads */
- err = recv_dless_read(mdev, req, sector, data_size);
+ err = recv_dless_read(mdev, req, sector, pi->size);
if (!err)
req_mod(req, DATA_RECEIVED);
/* else: nothing. handled from drbd_disconnect...
@@ -1572,8 +1571,7 @@ static int receive_DataReply(struct drbd_conf *mdev, enum drbd_packet cmd,
return err;
}

-static int receive_RSDataReply(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_RSDataReply(struct drbd_conf *mdev, struct packet_info *pi)
{
sector_t sector;
int err;
@@ -1586,17 +1584,17 @@ static int receive_RSDataReply(struct drbd_conf *mdev, enum drbd_packet cmd,
/* data is submitted to disk within recv_resync_read.
* corresponding put_ldev done below on error,
* or in drbd_peer_request_endio. */
- err = recv_resync_read(mdev, sector, data_size);
+ err = recv_resync_read(mdev, sector, pi->size);
} else {
if (__ratelimit(&drbd_ratelimit_state))
dev_err(DEV, "Can not write resync data to local disk.\n");

- err = drbd_drain_block(mdev, data_size);
+ err = drbd_drain_block(mdev, pi->size);

- drbd_send_ack_dp(mdev, P_NEG_ACK, p, data_size);
+ drbd_send_ack_dp(mdev, P_NEG_ACK, p, pi->size);
}

- atomic_add(data_size >> 9, &mdev->rs_sect_in);
+ atomic_add(pi->size >> 9, &mdev->rs_sect_in);

return err;
}
@@ -1961,8 +1959,7 @@ static int handle_write_conflicts(struct drbd_conf *mdev,
}

/* mirrored write */
-static int receive_Data(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_Data(struct drbd_conf *mdev, struct packet_info *pi)
{
sector_t sector;
struct drbd_peer_request *peer_req;
@@ -1976,9 +1973,9 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packet cmd,
int err2;

err = wait_for_and_update_peer_seq(mdev, peer_seq);
- drbd_send_ack_dp(mdev, P_NEG_ACK, p, data_size);
+ drbd_send_ack_dp(mdev, P_NEG_ACK, p, pi->size);
atomic_inc(&mdev->current_epoch->epoch_size);
- err2 = drbd_drain_block(mdev, data_size);
+ err2 = drbd_drain_block(mdev, pi->size);
if (!err)
err = err2;
return err;
@@ -1991,7 +1988,7 @@ static int receive_Data(struct drbd_conf *mdev, enum drbd_packet cmd,
*/

sector = be64_to_cpu(p->sector);
- peer_req = read_in_block(mdev, p->block_id, sector, data_size);
+ peer_req = read_in_block(mdev, p->block_id, sector, pi->size);
if (!peer_req) {
put_ldev(mdev);
return -EIO;
@@ -2141,8 +2138,7 @@ int drbd_rs_should_slow_down(struct drbd_conf *mdev, sector_t sector)
}


-static int receive_DataRequest(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int digest_size)
+static int receive_DataRequest(struct drbd_conf *mdev, struct packet_info *pi)
{
sector_t sector;
const sector_t capacity = drbd_get_capacity(mdev->this_bdev);
@@ -2168,7 +2164,7 @@ static int receive_DataRequest(struct drbd_conf *mdev, enum drbd_packet cmd,

if (!get_ldev_if_state(mdev, D_UP_TO_DATE)) {
verb = 1;
- switch (cmd) {
+ switch (pi->cmd) {
case P_DATA_REQUEST:
drbd_send_ack_rp(mdev, P_NEG_DREPLY, p);
break;
@@ -2190,7 +2186,7 @@ static int receive_DataRequest(struct drbd_conf *mdev, enum drbd_packet cmd,
"no local data.\n");

/* drain possibly payload */
- return drbd_drain_block(mdev, digest_size);
+ return drbd_drain_block(mdev, pi->size);
}

/* GFP_NOIO, because we must not cause arbitrary write-out: in a DRBD
@@ -2202,7 +2198,7 @@ static int receive_DataRequest(struct drbd_conf *mdev, enum drbd_packet cmd,
return -ENOMEM;
}

- switch (cmd) {
+ switch (pi->cmd) {
case P_DATA_REQUEST:
peer_req->w.cb = w_e_end_data_req;
fault_type = DRBD_FAULT_DT_RD;
@@ -2219,25 +2215,25 @@ static int receive_DataRequest(struct drbd_conf *mdev, enum drbd_packet cmd,
case P_OV_REPLY:
case P_CSUM_RS_REQUEST:
fault_type = DRBD_FAULT_RS_RD;
- di = kmalloc(sizeof(*di) + digest_size, GFP_NOIO);
+ di = kmalloc(sizeof(*di) + pi->size, GFP_NOIO);
if (!di)
goto out_free_e;

- di->digest_size = digest_size;
+ di->digest_size = pi->size;
di->digest = (((char *)di)+sizeof(struct digest_info));

peer_req->digest = di;
peer_req->flags |= EE_HAS_DIGEST;

- if (drbd_recv(mdev->tconn, di->digest, digest_size) != digest_size)
+ if (drbd_recv_all(mdev->tconn, di->digest, pi->size))
goto out_free_e;

- if (cmd == P_CSUM_RS_REQUEST) {
+ if (pi->cmd == P_CSUM_RS_REQUEST) {
D_ASSERT(mdev->tconn->agreed_pro_version >= 89);
peer_req->w.cb = w_e_end_csum_rs_req;
/* used in the sector offset progress display */
mdev->bm_resync_fo = BM_SECT_TO_BIT(sector);
- } else if (cmd == P_OV_REPLY) {
+ } else if (pi->cmd == P_OV_REPLY) {
/* track progress, we may need to throttle */
atomic_add(size >> 9, &mdev->rs_sect_in);
peer_req->w.cb = w_e_end_ov_reply;
@@ -2863,8 +2859,7 @@ static int cmp_after_sb(enum drbd_after_sb_p peer, enum drbd_after_sb_p self)
return 1;
}

-static int receive_protocol(struct drbd_tconn *tconn, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_protocol(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct p_protocol *p = tconn->data.rbuf;
int p_proto, p_after_sb_0p, p_after_sb_1p, p_after_sb_2p;
@@ -2918,7 +2913,7 @@ static int receive_protocol(struct drbd_tconn *tconn, enum drbd_packet cmd,
unsigned char *my_alg = tconn->net_conf->integrity_alg;
int err;

- err = drbd_recv_all(tconn, p_integrity_alg, data_size);
+ err = drbd_recv_all(tconn, p_integrity_alg, pi->size);
if (err)
return err;

@@ -2965,8 +2960,7 @@ struct crypto_hash *drbd_crypto_alloc_digest_safe(const struct drbd_conf *mdev,
return tfm;
}

-static int receive_SyncParam(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int packet_size)
+static int receive_SyncParam(struct drbd_conf *mdev, struct packet_info *pi)
{
struct p_rs_param_95 *p = mdev->tconn->data.rbuf;
unsigned int header_size, data_size, exp_max_sz;
@@ -2983,22 +2977,22 @@ static int receive_SyncParam(struct drbd_conf *mdev, enum drbd_packet cmd,
: apv <= 94 ? sizeof(struct p_rs_param_89)
: /* apv >= 95 */ sizeof(struct p_rs_param_95);

- if (packet_size > exp_max_sz) {
+ if (pi->size > exp_max_sz) {
dev_err(DEV, "SyncParam packet too long: received %u, expected <= %u bytes\n",
- packet_size, exp_max_sz);
+ pi->size, exp_max_sz);
return -EIO;
}

if (apv <= 88) {
header_size = sizeof(struct p_rs_param) - sizeof(struct p_header);
- data_size = packet_size - header_size;
+ data_size = pi->size - header_size;
} else if (apv <= 94) {
header_size = sizeof(struct p_rs_param_89) - sizeof(struct p_header);
- data_size = packet_size - header_size;
+ data_size = pi->size - header_size;
D_ASSERT(data_size == 0);
} else {
header_size = sizeof(struct p_rs_param_95) - sizeof(struct p_header);
- data_size = packet_size - header_size;
+ data_size = pi->size - header_size;
D_ASSERT(data_size == 0);
}

@@ -3132,8 +3126,7 @@ static void warn_if_differ_considerably(struct drbd_conf *mdev,
(unsigned long long)a, (unsigned long long)b);
}

-static int receive_sizes(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_sizes(struct drbd_conf *mdev, struct packet_info *pi)
{
struct p_sizes *p = mdev->tconn->data.rbuf;
enum determine_dev_size dd = unchanged;
@@ -3230,8 +3223,7 @@ static int receive_sizes(struct drbd_conf *mdev, enum drbd_packet cmd,
return 0;
}

-static int receive_uuids(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_uuids(struct drbd_conf *mdev, struct packet_info *pi)
{
struct p_uuids *p = mdev->tconn->data.rbuf;
u64 *p_uuid;
@@ -3326,8 +3318,7 @@ static union drbd_state convert_state(union drbd_state ps)
return ms;
}

-static int receive_req_state(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_req_state(struct drbd_conf *mdev, struct packet_info *pi)
{
struct p_req_state *p = mdev->tconn->data.rbuf;
union drbd_state mask, val;
@@ -3353,8 +3344,7 @@ static int receive_req_state(struct drbd_conf *mdev, enum drbd_packet cmd,
return 0;
}

-static int receive_req_conn_state(struct drbd_tconn *tconn, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_req_conn_state(struct drbd_tconn *tconn, struct packet_info *pi)
{
struct p_req_state *p = tconn->data.rbuf;
union drbd_state mask, val;
@@ -3378,8 +3368,7 @@ static int receive_req_conn_state(struct drbd_tconn *tconn, enum drbd_packet cmd
return 0;
}

-static int receive_state(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_state(struct drbd_conf *mdev, struct packet_info *pi)
{
struct p_state *p = mdev->tconn->data.rbuf;
union drbd_state os, ns, peer_state;
@@ -3531,8 +3520,7 @@ static int receive_state(struct drbd_conf *mdev, enum drbd_packet cmd,
return 0;
}

-static int receive_sync_uuid(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_sync_uuid(struct drbd_conf *mdev, struct packet_info *pi)
{
struct p_rs_uuid *p = mdev->tconn->data.rbuf;

@@ -3741,13 +3729,11 @@ void INFO_bm_xfer_stats(struct drbd_conf *mdev,
in order to be agnostic to the 32 vs 64 bits issue.

returns 0 on failure, 1 if we successfully received it. */
-static int receive_bitmap(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_bitmap(struct drbd_conf *mdev, struct packet_info *pi)
{
struct bm_xfer_ctx c;
int err;
struct p_header *h = mdev->tconn->data.rbuf;
- struct packet_info pi;

drbd_bm_lock(mdev, "receive bitmap", BM_LOCKED_SET_ALLOWED);
/* you are supposed to send additional out-of-sync information
@@ -3759,48 +3745,46 @@ static int receive_bitmap(struct drbd_conf *mdev, enum drbd_packet cmd,
};

for(;;) {
- if (cmd == P_BITMAP) {
- err = receive_bitmap_plain(mdev, data_size, h, &c);
- } else if (cmd == P_COMPRESSED_BITMAP) {
+ if (pi->cmd == P_BITMAP) {
+ err = receive_bitmap_plain(mdev, pi->size, h, &c);
+ } else if (pi->cmd == P_COMPRESSED_BITMAP) {
/* MAYBE: sanity check that we speak proto >= 90,
* and the feature is enabled! */
struct p_compressed_bm *p;

- if (data_size > BM_PACKET_PAYLOAD_BYTES) {
+ if (pi->size > BM_PACKET_PAYLOAD_BYTES) {
dev_err(DEV, "ReportCBitmap packet too large\n");
err = -EIO;
goto out;
}

p = mdev->tconn->data.rbuf;
- err = drbd_recv_all(mdev->tconn, p->head.payload, data_size);
+ err = drbd_recv_all(mdev->tconn, p->head.payload, pi->size);
if (err)
goto out;
- if (data_size <= (sizeof(*p) - sizeof(p->head))) {
- dev_err(DEV, "ReportCBitmap packet too small (l:%u)\n", data_size);
+ if (pi->size <= (sizeof(*p) - sizeof(p->head))) {
+ dev_err(DEV, "ReportCBitmap packet too small (l:%u)\n", pi->size);
err = -EIO;
goto out;
}
- err = decode_bitmap_c(mdev, p, &c, data_size);
+ err = decode_bitmap_c(mdev, p, &c, pi->size);
} else {
- dev_warn(DEV, "receive_bitmap: cmd neither ReportBitMap nor ReportCBitMap (is 0x%x)", cmd);
+ dev_warn(DEV, "receive_bitmap: cmd neither ReportBitMap nor ReportCBitMap (is 0x%x)", pi->cmd);
err = -EIO;
goto out;
}

- c.packets[cmd == P_BITMAP]++;
- c.bytes[cmd == P_BITMAP] += sizeof(struct p_header) + data_size;
+ c.packets[pi->cmd == P_BITMAP]++;
+ c.bytes[pi->cmd == P_BITMAP] += sizeof(struct p_header) + pi->size;

if (err <= 0) {
if (err < 0)
goto out;
break;
}
- err = drbd_recv_header(mdev->tconn, &pi);
+ err = drbd_recv_header(mdev->tconn, pi);
if (err)
goto out;
- cmd = pi.cmd;
- data_size = pi.size;
}

INFO_bm_xfer_stats(mdev, "receive", &c);
@@ -3846,25 +3830,23 @@ static int _tconn_receive_skip(struct drbd_tconn *tconn, unsigned int data_size)
return size ? -EIO : 0;
}

-static int receive_skip(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_skip(struct drbd_conf *mdev, struct packet_info *pi)
{
dev_warn(DEV, "skipping unknown optional packet type %d, l: %d!\n",
- cmd, data_size);
+ pi->cmd, pi->size);

- return _tconn_receive_skip(mdev->tconn, data_size);
+ return _tconn_receive_skip(mdev->tconn, pi->size);
}

-static int tconn_receive_skip(struct drbd_tconn *tconn, enum drbd_packet cmd, unsigned int data_size)
+static int tconn_receive_skip(struct drbd_tconn *tconn, struct packet_info *pi)
{
conn_warn(tconn, "skipping packet for non existing volume type %d, l: %d!\n",
- cmd, data_size);
+ pi->cmd, pi->size);

- return _tconn_receive_skip(tconn, data_size);
+ return _tconn_receive_skip(tconn, pi->size);
}

-static int receive_UnplugRemote(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_UnplugRemote(struct drbd_conf *mdev, struct packet_info *pi)
{
/* Make sure we've acked all the TCP data associated
* with the data requests being unplugged */
@@ -3873,8 +3855,7 @@ static int receive_UnplugRemote(struct drbd_conf *mdev, enum drbd_packet cmd,
return 0;
}

-static int receive_out_of_sync(struct drbd_conf *mdev, enum drbd_packet cmd,
- unsigned int data_size)
+static int receive_out_of_sync(struct drbd_conf *mdev, struct packet_info *pi)
{
struct p_block_desc *p = mdev->tconn->data.rbuf;

@@ -3898,10 +3879,8 @@ struct data_cmd {
size_t pkt_size;
enum mdev_or_conn fa_type; /* first argument's type */
union {
- int (*mdev_fn)(struct drbd_conf *, enum drbd_packet cmd,
- unsigned int to_receive);
- int (*conn_fn)(struct drbd_tconn *, enum drbd_packet cmd,
- unsigned int to_receive);
+ int (*mdev_fn)(struct drbd_conf *, struct packet_info *);
+ int (*conn_fn)(struct drbd_tconn *, struct packet_info *);
};
};

@@ -3961,15 +3940,16 @@ static void drbdd(struct drbd_tconn *tconn)
err = drbd_recv_all_warn(tconn, &header->payload, shs);
if (err)
goto err_out;
+ pi.size -= shs;
}

- if (cmd->fa_type == CONN) {
- err = cmd->conn_fn(tconn, pi.cmd, pi.size - shs);
- } else {
+ if (cmd->fa_type == CONN)
+ err = cmd->conn_fn(tconn, &pi);
+ else {
struct drbd_conf *mdev = vnr_to_mdev(tconn, pi.vnr);
err = mdev ?
- cmd->mdev_fn(mdev, pi.cmd, pi.size - shs) :
- tconn_receive_skip(tconn, pi.cmd, pi.size - shs);
+ cmd->mdev_fn(mdev, &pi) :
+ tconn_receive_skip(tconn, &pi);
}

if (unlikely(err)) {
--
1.7.4.1


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