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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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[SCSI] scsi_tcp: rm data rx and tx tfms
We currently allocated seperate tfms for data and header digests. There is no reason for this since we can never calculate a rx header and digest at the same time. Same for sends. So this patch removes the data tfms and has the send and recv sides use the rx_tfm or tx_tfm. I also made the connection creation code preallocate the tfms because I thought I hit a bug where I changed the digests settings during a relogin but could not allocate the tfm and then we just failed. Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Mike Christie
James Bottomley
parent
62f383003c
commit
dd8c0d9586
@ -693,7 +693,7 @@ iscsi_recv_digest_update(struct iscsi_tcp_conn *tcp_conn, char* buf, int len)
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struct scatterlist tmp;
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sg_init_one(&tmp, buf, len);
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crypto_digest_update(tcp_conn->data_rx_tfm, &tmp, 1);
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crypto_digest_update(tcp_conn->rx_tfm, &tmp, 1);
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}
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static int iscsi_scsi_data_in(struct iscsi_conn *conn)
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@ -748,11 +748,11 @@ static int iscsi_scsi_data_in(struct iscsi_conn *conn)
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if (conn->datadgst_en) {
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if (!offset)
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crypto_digest_update(
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tcp_conn->data_rx_tfm,
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tcp_conn->rx_tfm,
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&sg[i], 1);
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else
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partial_sg_digest_update(
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tcp_conn->data_rx_tfm,
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tcp_conn->rx_tfm,
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&sg[i],
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sg[i].offset + offset,
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sg[i].length - offset);
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@ -766,7 +766,7 @@ static int iscsi_scsi_data_in(struct iscsi_conn *conn)
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/*
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* data-in is complete, but buffer not...
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*/
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partial_sg_digest_update(tcp_conn->data_rx_tfm,
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partial_sg_digest_update(tcp_conn->rx_tfm,
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&sg[i],
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sg[i].offset, sg[i].length-rc);
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rc = 0;
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@ -885,10 +885,8 @@ iscsi_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb,
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*/
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rc = iscsi_tcp_hdr_recv(conn);
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if (!rc && tcp_conn->in.datalen) {
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if (conn->datadgst_en) {
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BUG_ON(!tcp_conn->data_rx_tfm);
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crypto_digest_init(tcp_conn->data_rx_tfm);
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}
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if (conn->datadgst_en)
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crypto_digest_init(tcp_conn->rx_tfm);
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tcp_conn->in_progress = IN_PROGRESS_DATA_RECV;
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} else if (rc) {
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iscsi_conn_failure(conn, rc);
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@ -940,10 +938,10 @@ iscsi_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb,
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tcp_conn->in.padding);
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memset(pad, 0, tcp_conn->in.padding);
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sg_init_one(&sg, pad, tcp_conn->in.padding);
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crypto_digest_update(tcp_conn->data_rx_tfm,
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crypto_digest_update(tcp_conn->rx_tfm,
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&sg, 1);
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}
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crypto_digest_final(tcp_conn->data_rx_tfm,
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crypto_digest_final(tcp_conn->rx_tfm,
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(u8 *) & tcp_conn->in.datadgst);
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debug_tcp("rx digest 0x%x\n", tcp_conn->in.datadgst);
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tcp_conn->in_progress = IN_PROGRESS_DDIGEST_RECV;
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@ -1188,7 +1186,7 @@ static inline void
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iscsi_data_digest_init(struct iscsi_tcp_conn *tcp_conn,
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struct iscsi_tcp_cmd_task *tcp_ctask)
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{
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crypto_digest_init(tcp_conn->data_tx_tfm);
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crypto_digest_init(tcp_conn->tx_tfm);
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tcp_ctask->digest_count = 4;
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}
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@ -1444,7 +1442,7 @@ iscsi_send_padding(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
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iscsi_buf_init_iov(&tcp_ctask->sendbuf, (char*)&tcp_ctask->pad,
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tcp_ctask->pad_count);
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if (conn->datadgst_en)
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crypto_digest_update(tcp_conn->data_tx_tfm,
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crypto_digest_update(tcp_conn->tx_tfm,
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&tcp_ctask->sendbuf.sg, 1);
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} else if (!(tcp_ctask->xmstate & XMSTATE_W_RESEND_PAD))
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return 0;
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@ -1477,7 +1475,7 @@ iscsi_send_digest(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
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tcp_conn = conn->dd_data;
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if (!(tcp_ctask->xmstate & XMSTATE_W_RESEND_DATA_DIGEST)) {
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crypto_digest_final(tcp_conn->data_tx_tfm, (u8*)digest);
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crypto_digest_final(tcp_conn->tx_tfm, (u8*)digest);
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iscsi_buf_init_iov(buf, (char*)digest, 4);
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}
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tcp_ctask->xmstate &= ~XMSTATE_W_RESEND_DATA_DIGEST;
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@ -1511,7 +1509,7 @@ iscsi_send_data(struct iscsi_cmd_task *ctask, struct iscsi_buf *sendbuf,
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rc = iscsi_sendpage(conn, sendbuf, count, &buf_sent);
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*sent = *sent + buf_sent;
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if (buf_sent && conn->datadgst_en)
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partial_sg_digest_update(tcp_conn->data_tx_tfm,
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partial_sg_digest_update(tcp_conn->tx_tfm,
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&sendbuf->sg, sendbuf->sg.offset + offset,
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buf_sent);
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if (!iscsi_buf_left(sendbuf) && *sg != tcp_ctask->bad_sg) {
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@ -1547,10 +1545,6 @@ iscsi_send_unsol_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
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if (conn->hdrdgst_en)
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iscsi_hdr_digest(conn, &tcp_ctask->headbuf,
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(u8*)dtask->hdrext);
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if (conn->datadgst_en) {
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iscsi_data_digest_init(ctask->conn->dd_data, tcp_ctask);
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dtask->digest = 0;
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}
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tcp_ctask->xmstate &= ~XMSTATE_UNS_INIT;
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iscsi_set_padding(tcp_ctask, ctask->data_count);
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@ -1563,6 +1557,12 @@ iscsi_send_unsol_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
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return rc;
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}
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if (conn->datadgst_en) {
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dtask = &tcp_ctask->unsol_dtask;
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iscsi_data_digest_init(ctask->conn->dd_data, tcp_ctask);
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dtask->digest = 0;
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}
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debug_scsi("uns dout [itt 0x%x dlen %d sent %d]\n",
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ctask->itt, ctask->unsol_count, tcp_ctask->sent);
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return 0;
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@ -1629,12 +1629,6 @@ static int iscsi_send_sol_pdu(struct iscsi_conn *conn,
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if (conn->hdrdgst_en)
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iscsi_hdr_digest(conn, &r2t->headbuf,
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(u8*)dtask->hdrext);
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if (conn->datadgst_en) {
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iscsi_data_digest_init(conn->dd_data, tcp_ctask);
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dtask->digest = 0;
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}
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rc = iscsi_sendhdr(conn, &r2t->headbuf, r2t->data_count);
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if (rc) {
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tcp_ctask->xmstate &= ~XMSTATE_SOL_DATA;
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@ -1642,6 +1636,11 @@ static int iscsi_send_sol_pdu(struct iscsi_conn *conn,
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return rc;
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}
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if (conn->datadgst_en) {
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iscsi_data_digest_init(conn->dd_data, tcp_ctask);
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dtask->digest = 0;
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}
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iscsi_set_padding(tcp_ctask, r2t->data_count);
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debug_scsi("sol dout [dsn %d itt 0x%x dlen %d sent %d]\n",
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r2t->solicit_datasn - 1, ctask->itt, r2t->data_count,
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@ -1764,8 +1763,20 @@ iscsi_tcp_conn_create(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
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/* initial operational parameters */
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tcp_conn->hdr_size = sizeof(struct iscsi_hdr);
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tcp_conn->tx_tfm = crypto_alloc_tfm("crc32c", 0);
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if (!tcp_conn->tx_tfm)
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goto free_tcp_conn;
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tcp_conn->rx_tfm = crypto_alloc_tfm("crc32c", 0);
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if (!tcp_conn->rx_tfm)
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goto free_tx_tfm;
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return cls_conn;
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free_tx_tfm:
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crypto_free_tfm(tcp_conn->tx_tfm);
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free_tcp_conn:
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kfree(tcp_conn);
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tcp_conn_alloc_fail:
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iscsi_conn_teardown(cls_conn);
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return NULL;
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@ -1807,10 +1818,6 @@ iscsi_tcp_conn_destroy(struct iscsi_cls_conn *cls_conn)
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crypto_free_tfm(tcp_conn->tx_tfm);
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if (tcp_conn->rx_tfm)
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crypto_free_tfm(tcp_conn->rx_tfm);
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if (tcp_conn->data_tx_tfm)
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crypto_free_tfm(tcp_conn->data_tx_tfm);
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if (tcp_conn->data_rx_tfm)
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crypto_free_tfm(tcp_conn->data_rx_tfm);
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}
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kfree(tcp_conn);
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@ -1968,48 +1975,11 @@ iscsi_conn_set_param(struct iscsi_cls_conn *cls_conn, enum iscsi_param param,
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case ISCSI_PARAM_HDRDGST_EN:
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iscsi_set_param(cls_conn, param, buf, buflen);
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tcp_conn->hdr_size = sizeof(struct iscsi_hdr);
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if (conn->hdrdgst_en) {
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if (conn->hdrdgst_en)
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tcp_conn->hdr_size += sizeof(__u32);
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if (!tcp_conn->tx_tfm)
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tcp_conn->tx_tfm = crypto_alloc_tfm("crc32c",
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0);
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if (!tcp_conn->tx_tfm)
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return -ENOMEM;
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if (!tcp_conn->rx_tfm)
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tcp_conn->rx_tfm = crypto_alloc_tfm("crc32c",
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0);
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if (!tcp_conn->rx_tfm) {
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crypto_free_tfm(tcp_conn->tx_tfm);
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return -ENOMEM;
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}
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} else {
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if (tcp_conn->tx_tfm)
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crypto_free_tfm(tcp_conn->tx_tfm);
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if (tcp_conn->rx_tfm)
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crypto_free_tfm(tcp_conn->rx_tfm);
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}
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break;
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case ISCSI_PARAM_DATADGST_EN:
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iscsi_set_param(cls_conn, param, buf, buflen);
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if (conn->datadgst_en) {
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if (!tcp_conn->data_tx_tfm)
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tcp_conn->data_tx_tfm =
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crypto_alloc_tfm("crc32c", 0);
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if (!tcp_conn->data_tx_tfm)
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return -ENOMEM;
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if (!tcp_conn->data_rx_tfm)
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tcp_conn->data_rx_tfm =
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crypto_alloc_tfm("crc32c", 0);
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if (!tcp_conn->data_rx_tfm) {
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crypto_free_tfm(tcp_conn->data_tx_tfm);
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return -ENOMEM;
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}
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} else {
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if (tcp_conn->data_tx_tfm)
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crypto_free_tfm(tcp_conn->data_tx_tfm);
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if (tcp_conn->data_rx_tfm)
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crypto_free_tfm(tcp_conn->data_rx_tfm);
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}
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tcp_conn->sendpage = conn->datadgst_en ?
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sock_no_sendpage : tcp_conn->sock->ops->sendpage;
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break;
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@ -81,10 +81,6 @@ struct iscsi_tcp_conn {
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* stop to terminate */
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/* iSCSI connection-wide sequencing */
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int hdr_size; /* PDU header size */
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struct crypto_tfm *rx_tfm; /* CRC32C (Rx) */
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struct crypto_tfm *data_rx_tfm; /* CRC32C (Rx) for data */
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/* control data */
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struct iscsi_tcp_recv in; /* TCP receive context */
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int in_progress; /* connection state machine */
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@ -94,9 +90,9 @@ struct iscsi_tcp_conn {
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void (*old_state_change)(struct sock *);
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void (*old_write_space)(struct sock *);
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/* xmit */
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/* data and header digests */
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struct crypto_tfm *tx_tfm; /* CRC32C (Tx) */
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struct crypto_tfm *data_tx_tfm; /* CRC32C (Tx) for data */
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struct crypto_tfm *rx_tfm; /* CRC32C (Rx) */
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/* MIB custom statistics */
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uint32_t sendpage_failures_cnt;
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