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drbd: Pass struct packet_info down to the receive functions

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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:
Andreas Gruenbacher 2011-03-25 00:57:38 +01:00 committed by Philipp Reisner
parent 49ba9b1bb3
commit e28572167c
1 changed files with 65 additions and 85 deletions
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150
drivers/block/drbd/drbd_receiver.c
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@ -50,8 +50,8 @@
struct packet_info {
enum drbd_packet cmd;
int size;
int vnr;
unsigned int size;
unsigned int vnr;
};
enum finish_epoch {
@ -1540,8 +1540,7 @@ 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;
@ -1559,7 +1558,7 @@ 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...
@ -1569,8 +1568,7 @@ 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;
@ -1583,17 +1581,17 @@ 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;
}
@ -1958,8 +1956,7 @@ 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;
@ -1973,9 +1970,9 @@ 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;
@ -1988,7 +1985,7 @@ 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;
@ -2138,8 +2135,7 @@ 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);
@ -2165,7 +2161,7 @@ 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;
@ -2187,7 +2183,7 @@ 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
@ -2199,7 +2195,7 @@ 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;
@ -2216,25 +2212,25 @@ 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;
@ -2860,8 +2856,7 @@ 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;
@ -2915,7 +2910,7 @@ 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;
@ -2962,8 +2957,7 @@ 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;
@ -2980,22 +2974,22 @@ 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);
}
@ -3134,8 +3128,7 @@ 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;
@ -3232,8 +3225,7 @@ 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;
@ -3328,8 +3320,7 @@ 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;
@ -3355,8 +3346,7 @@ 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;
@ -3380,8 +3370,7 @@ 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;
@ -3533,8 +3522,7 @@ 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;
@ -3743,13 +3731,11 @@ 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
@ -3761,48 +3747,46 @@ 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);
@ -3848,25 +3832,23 @@ 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 */
@ -3875,8 +3857,7 @@ 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;
@ -3900,10 +3881,8 @@ 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 *);
};
};
@ -3963,15 +3942,16 @@ 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)) {