diff options
Diffstat (limited to 'drivers/block/nbd.c')
| -rw-r--r-- | drivers/block/nbd.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 41a90150b501..b852050d8a96 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -181,6 +181,17 @@ static void nbd_requeue_cmd(struct nbd_cmd *cmd) { struct request *req = blk_mq_rq_from_pdu(cmd); + lockdep_assert_held(&cmd->lock); + + /* + * Clear INFLIGHT flag so that this cmd won't be completed in + * normal completion path + * + * INFLIGHT flag will be set when the cmd is queued to nbd next + * time. + */ + __clear_bit(NBD_CMD_INFLIGHT, &cmd->flags); + if (!test_and_set_bit(NBD_CMD_REQUEUED, &cmd->flags)) blk_mq_requeue_request(req, true); } @@ -339,7 +350,7 @@ static int __nbd_set_size(struct nbd_device *nbd, loff_t bytesize, lim = queue_limits_start_update(nbd->disk->queue); if (nbd->config->flags & NBD_FLAG_SEND_TRIM) - lim.max_hw_discard_sectors = UINT_MAX; + lim.max_hw_discard_sectors = UINT_MAX >> SECTOR_SHIFT; else lim.max_hw_discard_sectors = 0; if (!(nbd->config->flags & NBD_FLAG_SEND_FLUSH)) { @@ -350,6 +361,11 @@ static int __nbd_set_size(struct nbd_device *nbd, loff_t bytesize, lim.features |= BLK_FEAT_WRITE_CACHE; lim.features &= ~BLK_FEAT_FUA; } + if (nbd->config->flags & NBD_FLAG_ROTATIONAL) + lim.features |= BLK_FEAT_ROTATIONAL; + if (nbd->config->flags & NBD_FLAG_SEND_WRITE_ZEROES) + lim.max_write_zeroes_sectors = UINT_MAX >> SECTOR_SHIFT; + lim.logical_block_size = blksize; lim.physical_block_size = blksize; error = queue_limits_commit_update(nbd->disk->queue, &lim); @@ -418,6 +434,8 @@ static u32 req_to_nbd_cmd_type(struct request *req) return NBD_CMD_WRITE; case REQ_OP_READ: return NBD_CMD_READ; + case REQ_OP_WRITE_ZEROES: + return NBD_CMD_WRITE_ZEROES; default: return U32_MAX; } @@ -488,8 +506,8 @@ static enum blk_eh_timer_return nbd_xmit_timeout(struct request *req) nbd_mark_nsock_dead(nbd, nsock, 1); mutex_unlock(&nsock->tx_lock); } - mutex_unlock(&cmd->lock); nbd_requeue_cmd(cmd); + mutex_unlock(&cmd->lock); nbd_config_put(nbd); return BLK_EH_DONE; } @@ -634,6 +652,8 @@ static blk_status_t nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, if (req->cmd_flags & REQ_FUA) nbd_cmd_flags |= NBD_CMD_FLAG_FUA; + if ((req->cmd_flags & REQ_NOUNMAP) && (type == NBD_CMD_WRITE_ZEROES)) + nbd_cmd_flags |= NBD_CMD_FLAG_NO_HOLE; /* We did a partial send previously, and we at least sent the whole * request struct, so just go and send the rest of the pages in the @@ -1703,6 +1723,10 @@ static int nbd_dbg_flags_show(struct seq_file *s, void *unused) seq_puts(s, "NBD_FLAG_SEND_FUA\n"); if (flags & NBD_FLAG_SEND_TRIM) seq_puts(s, "NBD_FLAG_SEND_TRIM\n"); + if (flags & NBD_FLAG_SEND_WRITE_ZEROES) + seq_puts(s, "NBD_FLAG_SEND_WRITE_ZEROES\n"); + if (flags & NBD_FLAG_ROTATIONAL) + seq_puts(s, "NBD_FLAG_ROTATIONAL\n"); return 0; } |