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nbd: use dev_err_ratelimited in io path 

While doing stress tests we noticed that we'd get a lot of dmesg spam if
we suddenly disconnected the nbd device out of band.  Rate limit the
messages in the io path in order to deal with this.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Josef Bacik 2016-12-05 16:20:29 -05:00 committed by Jens Axboe
parent 20032ec38d
commit a897b6664e
1 changed files with 12 additions and 11 deletions
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23
drivers/block/nbd.c
View File

@ -219,7 +219,7 @@ static int sock_xmit(struct nbd_device *nbd, int index, int send, void *buf,
unsigned long pflags = current->flags;
if (unlikely(!sock)) {
dev_err(disk_to_dev(nbd->disk),
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Attempted %s on closed socket in sock_xmit\n",
(send ? "send" : "recv"));
return -EINVAL;
@ -302,7 +302,7 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index)
result = sock_xmit(nbd, index, 1, &request, sizeof(request),
(type == NBD_CMD_WRITE) ? MSG_MORE : 0);
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk),
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Send control failed (result %d)\n", result);
return -EIO;
}
@ -501,14 +501,14 @@ static void nbd_handle_cmd(struct nbd_cmd *cmd, int index)
struct nbd_sock *nsock;
if (index >= nbd->num_connections) {
dev_err(disk_to_dev(nbd->disk),
"Attempted send on invalid socket\n");
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Attempted send on invalid socket\n");
goto error_out;
}
if (test_bit(NBD_DISCONNECTED, &nbd->runtime_flags)) {
dev_err(disk_to_dev(nbd->disk),
"Attempted send on closed socket\n");
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Attempted send on closed socket\n");
goto error_out;
}
@ -519,8 +519,8 @@ static void nbd_handle_cmd(struct nbd_cmd *cmd, int index)
if (req->cmd_type == REQ_TYPE_FS &&
rq_data_dir(req) == WRITE &&
(nbd->flags & NBD_FLAG_READ_ONLY)) {
dev_err(disk_to_dev(nbd->disk),
"Write on read-only\n");
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Write on read-only\n");
goto error_out;
}
@ -530,13 +530,14 @@ static void nbd_handle_cmd(struct nbd_cmd *cmd, int index)
mutex_lock(&nsock->tx_lock);
if (unlikely(!nsock->sock)) {
mutex_unlock(&nsock->tx_lock);
dev_err(disk_to_dev(nbd->disk),
"Attempted send on closed socket\n");
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Attempted send on closed socket\n");
goto error_out;
}
if (nbd_send_cmd(nbd, cmd, index) != 0) {
dev_err(disk_to_dev(nbd->disk), "Request send failed\n");
dev_err_ratelimited(disk_to_dev(nbd->disk),
"Request send failed\n");
req->errors++;
nbd_end_request(cmd);
}