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iser-target: Kill the ->isert_cmd back pointer in struct iser_tx_desc
We only use the pointer when processing regular iSER commands, and it then always points to the struct iser_cmd that contains the TX descriptor. Remove it and rely on container_of to save a little space and avoid a pointer that is updated multiple times per processed command. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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d1ca2ed7dc
commit
e3416ab2d1
2 changed files with 8 additions and 9 deletions
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@ -1041,7 +1041,6 @@ isert_create_send_desc(struct isert_conn *isert_conn,
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tx_desc->iser_header.flags = ISCSI_CTRL;
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tx_desc->num_sge = 1;
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tx_desc->isert_cmd = isert_cmd;
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if (tx_desc->tx_sg[0].lkey != device->pd->local_dma_lkey) {
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tx_desc->tx_sg[0].lkey = device->pd->local_dma_lkey;
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@ -1882,7 +1881,7 @@ isert_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc)
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struct isert_conn *isert_conn = wc->qp->qp_context;
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struct isert_device *device = isert_conn->device;
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struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe);
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struct isert_cmd *isert_cmd = desc->isert_cmd;
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struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc);
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struct se_cmd *cmd = &isert_cmd->iscsi_cmd->se_cmd;
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int ret = 0;
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@ -1916,7 +1915,7 @@ isert_rdma_read_done(struct ib_cq *cq, struct ib_wc *wc)
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struct isert_conn *isert_conn = wc->qp->qp_context;
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struct isert_device *device = isert_conn->device;
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struct iser_tx_desc *desc = cqe_to_tx_desc(wc->wr_cqe);
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struct isert_cmd *isert_cmd = desc->isert_cmd;
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struct isert_cmd *isert_cmd = tx_desc_to_cmd(desc);
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struct iscsi_cmd *cmd = isert_cmd->iscsi_cmd;
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struct se_cmd *se_cmd = &cmd->se_cmd;
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int ret = 0;
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@ -2009,7 +2008,7 @@ isert_send_done(struct ib_cq *cq, struct ib_wc *wc)
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struct isert_conn *isert_conn = wc->qp->qp_context;
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struct ib_device *ib_dev = isert_conn->cm_id->device;
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struct iser_tx_desc *tx_desc = cqe_to_tx_desc(wc->wr_cqe);
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struct isert_cmd *isert_cmd = tx_desc->isert_cmd;
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struct isert_cmd *isert_cmd = tx_desc_to_cmd(tx_desc);
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if (unlikely(wc->status != IB_WC_SUCCESS)) {
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isert_print_wc(wc, "send");
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@ -2339,8 +2338,6 @@ isert_map_rdma(struct isert_cmd *isert_cmd, struct iscsi_conn *conn)
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u32 offset, data_len, data_left, rdma_write_max, va_offset = 0;
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int ret = 0, i, ib_sge_cnt;
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isert_cmd->tx_desc.isert_cmd = isert_cmd;
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offset = isert_cmd->iser_ib_op == ISER_IB_RDMA_READ ?
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cmd->write_data_done : 0;
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ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg,
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@ -2702,8 +2699,6 @@ isert_reg_rdma(struct isert_cmd *isert_cmd, struct iscsi_conn *conn)
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int ret = 0;
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unsigned long flags;
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isert_cmd->tx_desc.isert_cmd = isert_cmd;
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offset = isert_cmd->iser_ib_op == ISER_IB_RDMA_READ ?
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cmd->write_data_done : 0;
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ret = isert_map_data_buf(isert_conn, isert_cmd, se_cmd->t_data_sg,
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@ -110,7 +110,6 @@ struct iser_tx_desc {
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struct ib_sge tx_sg[2];
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struct ib_cqe tx_cqe;
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int num_sge;
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struct isert_cmd *isert_cmd;
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struct ib_send_wr send_wr;
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} __packed;
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@ -181,6 +180,11 @@ struct isert_cmd {
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struct scatterlist sg;
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};
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static inline struct isert_cmd *tx_desc_to_cmd(struct iser_tx_desc *desc)
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{
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return container_of(desc, struct isert_cmd, tx_desc);
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}
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struct isert_device;
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struct isert_conn {
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