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path: root/drivers/target/iscsi/iscsi_target.c
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Diffstat (limited to 'drivers/target/iscsi/iscsi_target.c')
-rw-r--r--drivers/target/iscsi/iscsi_target.c701
1 files changed, 272 insertions, 429 deletions
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 961202f4e..50f3d3a0d 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -478,16 +478,16 @@ int iscsit_del_np(struct iscsi_np *np)
return 0;
}
-static int iscsit_immediate_queue(struct iscsi_conn *, struct iscsi_cmd *, int);
-static int iscsit_response_queue(struct iscsi_conn *, struct iscsi_cmd *, int);
+static void iscsit_get_rx_pdu(struct iscsi_conn *);
-static int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
+int iscsit_queue_rsp(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
{
iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
return 0;
}
+EXPORT_SYMBOL(iscsit_queue_rsp);
-static void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
+void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
{
bool scsi_cmd = (cmd->iscsi_opcode == ISCSI_OP_SCSI_CMD);
@@ -498,6 +498,169 @@ static void iscsit_aborted_task(struct iscsi_conn *conn, struct iscsi_cmd *cmd)
__iscsit_free_cmd(cmd, scsi_cmd, true);
}
+EXPORT_SYMBOL(iscsit_aborted_task);
+
+static void iscsit_do_crypto_hash_buf(struct ahash_request *, const void *,
+ u32, u32, u8 *, u8 *);
+static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *);
+
+static int
+iscsit_xmit_nondatain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ const void *data_buf, u32 data_buf_len)
+{
+ struct iscsi_hdr *hdr = (struct iscsi_hdr *)cmd->pdu;
+ struct kvec *iov;
+ u32 niov = 0, tx_size = ISCSI_HDR_LEN;
+ int ret;
+
+ iov = &cmd->iov_misc[0];
+ iov[niov].iov_base = cmd->pdu;
+ iov[niov++].iov_len = ISCSI_HDR_LEN;
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
+ ISCSI_HDR_LEN, 0, NULL,
+ (u8 *)header_digest);
+
+ iov[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attaching CRC32C HeaderDigest"
+ " to opcode 0x%x 0x%08x\n",
+ hdr->opcode, *header_digest);
+ }
+
+ if (data_buf_len) {
+ u32 padding = ((-data_buf_len) & 3);
+
+ iov[niov].iov_base = (void *)data_buf;
+ iov[niov++].iov_len = data_buf_len;
+ tx_size += data_buf_len;
+
+ if (padding != 0) {
+ iov[niov].iov_base = &cmd->pad_bytes;
+ iov[niov++].iov_len = padding;
+ tx_size += padding;
+ pr_debug("Attaching %u additional"
+ " padding bytes.\n", padding);
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ iscsit_do_crypto_hash_buf(conn->conn_tx_hash,
+ data_buf, data_buf_len,
+ padding,
+ (u8 *)&cmd->pad_bytes,
+ (u8 *)&cmd->data_crc);
+
+ iov[niov].iov_base = &cmd->data_crc;
+ iov[niov++].iov_len = ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+ pr_debug("Attached DataDigest for %u"
+ " bytes opcode 0x%x, CRC 0x%08x\n",
+ data_buf_len, hdr->opcode, cmd->data_crc);
+ }
+ }
+
+ cmd->iov_misc_count = niov;
+ cmd->tx_size = tx_size;
+
+ ret = iscsit_send_tx_data(cmd, conn, 1);
+ if (ret < 0) {
+ iscsit_tx_thread_wait_for_tcp(conn);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int iscsit_map_iovec(struct iscsi_cmd *, struct kvec *, u32, u32);
+static void iscsit_unmap_iovec(struct iscsi_cmd *);
+static u32 iscsit_do_crypto_hash_sg(struct ahash_request *, struct iscsi_cmd *,
+ u32, u32, u32, u8 *);
+static int
+iscsit_xmit_datain_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ const struct iscsi_datain *datain)
+{
+ struct kvec *iov;
+ u32 iov_count = 0, tx_size = 0;
+ int ret, iov_ret;
+
+ iov = &cmd->iov_data[0];
+ iov[iov_count].iov_base = cmd->pdu;
+ iov[iov_count++].iov_len = ISCSI_HDR_LEN;
+ tx_size += ISCSI_HDR_LEN;
+
+ if (conn->conn_ops->HeaderDigest) {
+ u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
+
+ iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu,
+ ISCSI_HDR_LEN, 0, NULL,
+ (u8 *)header_digest);
+
+ iov[0].iov_len += ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+
+ pr_debug("Attaching CRC32 HeaderDigest for DataIN PDU 0x%08x\n",
+ *header_digest);
+ }
+
+ iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1],
+ datain->offset, datain->length);
+ if (iov_ret < 0)
+ return -1;
+
+ iov_count += iov_ret;
+ tx_size += datain->length;
+
+ cmd->padding = ((-datain->length) & 3);
+ if (cmd->padding) {
+ iov[iov_count].iov_base = cmd->pad_bytes;
+ iov[iov_count++].iov_len = cmd->padding;
+ tx_size += cmd->padding;
+
+ pr_debug("Attaching %u padding bytes\n", cmd->padding);
+ }
+
+ if (conn->conn_ops->DataDigest) {
+ cmd->data_crc = iscsit_do_crypto_hash_sg(conn->conn_tx_hash,
+ cmd, datain->offset,
+ datain->length,
+ cmd->padding,
+ cmd->pad_bytes);
+
+ iov[iov_count].iov_base = &cmd->data_crc;
+ iov[iov_count++].iov_len = ISCSI_CRC_LEN;
+ tx_size += ISCSI_CRC_LEN;
+
+ pr_debug("Attached CRC32C DataDigest %d bytes, crc 0x%08x\n",
+ datain->length + cmd->padding, cmd->data_crc);
+ }
+
+ cmd->iov_data_count = iov_count;
+ cmd->tx_size = tx_size;
+
+ ret = iscsit_fe_sendpage_sg(cmd, conn);
+
+ iscsit_unmap_iovec(cmd);
+
+ if (ret < 0) {
+ iscsit_tx_thread_wait_for_tcp(conn);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int iscsit_xmit_pdu(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ struct iscsi_datain_req *dr, const void *buf,
+ u32 buf_len)
+{
+ if (dr)
+ return iscsit_xmit_datain_pdu(conn, cmd, buf);
+ else
+ return iscsit_xmit_nondatain_pdu(conn, cmd, buf, buf_len);
+}
static enum target_prot_op iscsit_get_sup_prot_ops(struct iscsi_conn *conn)
{
@@ -507,6 +670,7 @@ static enum target_prot_op iscsit_get_sup_prot_ops(struct iscsi_conn *conn)
static struct iscsit_transport iscsi_target_transport = {
.name = "iSCSI/TCP",
.transport_type = ISCSI_TCP,
+ .rdma_shutdown = false,
.owner = NULL,
.iscsit_setup_np = iscsit_setup_np,
.iscsit_accept_np = iscsit_accept_np,
@@ -519,6 +683,8 @@ static struct iscsit_transport iscsi_target_transport = {
.iscsit_queue_data_in = iscsit_queue_rsp,
.iscsit_queue_status = iscsit_queue_rsp,
.iscsit_aborted_task = iscsit_aborted_task,
+ .iscsit_xmit_pdu = iscsit_xmit_pdu,
+ .iscsit_get_rx_pdu = iscsit_get_rx_pdu,
.iscsit_get_sup_prot_ops = iscsit_get_sup_prot_ops,
};
@@ -634,7 +800,7 @@ static void __exit iscsi_target_cleanup_module(void)
kfree(iscsit_global);
}
-static int iscsit_add_reject(
+int iscsit_add_reject(
struct iscsi_conn *conn,
u8 reason,
unsigned char *buf)
@@ -664,6 +830,7 @@ static int iscsit_add_reject(
return -1;
}
+EXPORT_SYMBOL(iscsit_add_reject);
static int iscsit_add_reject_from_cmd(
struct iscsi_cmd *cmd,
@@ -719,6 +886,7 @@ int iscsit_reject_cmd(struct iscsi_cmd *cmd, u8 reason, unsigned char *buf)
{
return iscsit_add_reject_from_cmd(cmd, reason, false, buf);
}
+EXPORT_SYMBOL(iscsit_reject_cmd);
/*
* Map some portion of the allocated scatterlist to an iovec, suitable for
@@ -737,7 +905,14 @@ static int iscsit_map_iovec(
/*
* We know each entry in t_data_sg contains a page.
*/
- sg = &cmd->se_cmd.t_data_sg[data_offset / PAGE_SIZE];
+ u32 ent = data_offset / PAGE_SIZE;
+
+ if (ent >= cmd->se_cmd.t_data_nents) {
+ pr_err("Initial page entry out-of-bounds\n");
+ return -1;
+ }
+
+ sg = &cmd->se_cmd.t_data_sg[ent];
page_off = (data_offset % PAGE_SIZE);
cmd->first_data_sg = sg;
@@ -2335,7 +2510,7 @@ iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
}
EXPORT_SYMBOL(iscsit_handle_logout_cmd);
-static int iscsit_handle_snack(
+int iscsit_handle_snack(
struct iscsi_conn *conn,
unsigned char *buf)
{
@@ -2388,6 +2563,7 @@ static int iscsit_handle_snack(
return 0;
}
+EXPORT_SYMBOL(iscsit_handle_snack);
static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn)
{
@@ -2534,7 +2710,6 @@ static int iscsit_send_conn_drop_async_message(
{
struct iscsi_async *hdr;
- cmd->tx_size = ISCSI_HDR_LEN;
cmd->iscsi_opcode = ISCSI_OP_ASYNC_EVENT;
hdr = (struct iscsi_async *) cmd->pdu;
@@ -2552,25 +2727,11 @@ static int iscsit_send_conn_drop_async_message(
hdr->param2 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Wait);
hdr->param3 = cpu_to_be16(conn->sess->sess_ops->DefaultTime2Retain);
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- cmd->tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32C HeaderDigest to"
- " Async Message 0x%08x\n", *header_digest);
- }
-
- cmd->iov_misc[0].iov_base = cmd->pdu;
- cmd->iov_misc[0].iov_len = cmd->tx_size;
- cmd->iov_misc_count = 1;
-
pr_debug("Sending Connection Dropped Async Message StatSN:"
" 0x%08x, for CID: %hu on CID: %hu\n", cmd->stat_sn,
cmd->logout_cid, conn->cid);
- return 0;
+
+ return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
}
static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn)
@@ -2583,7 +2744,7 @@ static void iscsit_tx_thread_wait_for_tcp(struct iscsi_conn *conn)
}
}
-static void
+void
iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
struct iscsi_datain *datain, struct iscsi_data_rsp *hdr,
bool set_statsn)
@@ -2627,15 +2788,14 @@ iscsit_build_datain_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
cmd->init_task_tag, ntohl(hdr->statsn), ntohl(hdr->datasn),
ntohl(hdr->offset), datain->length, conn->cid);
}
+EXPORT_SYMBOL(iscsit_build_datain_pdu);
static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
{
struct iscsi_data_rsp *hdr = (struct iscsi_data_rsp *)&cmd->pdu[0];
struct iscsi_datain datain;
struct iscsi_datain_req *dr;
- struct kvec *iov;
- u32 iov_count = 0, tx_size = 0;
- int eodr = 0, ret, iov_ret;
+ int eodr = 0, ret;
bool set_statsn = false;
memset(&datain, 0, sizeof(struct iscsi_datain));
@@ -2677,64 +2837,9 @@ static int iscsit_send_datain(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
iscsit_build_datain_pdu(cmd, conn, &datain, hdr, set_statsn);
- iov = &cmd->iov_data[0];
- iov[iov_count].iov_base = cmd->pdu;
- iov[iov_count++].iov_len = ISCSI_HDR_LEN;
- tx_size += ISCSI_HDR_LEN;
-
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- iov[0].iov_len += ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
-
- pr_debug("Attaching CRC32 HeaderDigest"
- " for DataIN PDU 0x%08x\n", *header_digest);
- }
-
- iov_ret = iscsit_map_iovec(cmd, &cmd->iov_data[1],
- datain.offset, datain.length);
- if (iov_ret < 0)
- return -1;
-
- iov_count += iov_ret;
- tx_size += datain.length;
-
- cmd->padding = ((-datain.length) & 3);
- if (cmd->padding) {
- iov[iov_count].iov_base = cmd->pad_bytes;
- iov[iov_count++].iov_len = cmd->padding;
- tx_size += cmd->padding;
-
- pr_debug("Attaching %u padding bytes\n",
- cmd->padding);
- }
- if (conn->conn_ops->DataDigest) {
- cmd->data_crc = iscsit_do_crypto_hash_sg(conn->conn_tx_hash, cmd,
- datain.offset, datain.length, cmd->padding, cmd->pad_bytes);
-
- iov[iov_count].iov_base = &cmd->data_crc;
- iov[iov_count++].iov_len = ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
-
- pr_debug("Attached CRC32C DataDigest %d bytes, crc"
- " 0x%08x\n", datain.length+cmd->padding, cmd->data_crc);
- }
-
- cmd->iov_data_count = iov_count;
- cmd->tx_size = tx_size;
-
- ret = iscsit_fe_sendpage_sg(cmd, conn);
-
- iscsit_unmap_iovec(cmd);
-
- if (ret < 0) {
- iscsit_tx_thread_wait_for_tcp(conn);
+ ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, dr, &datain, 0);
+ if (ret < 0)
return ret;
- }
if (dr->dr_complete) {
eodr = (cmd->se_cmd.se_cmd_flags & SCF_TRANSPORT_TASK_SENSE) ?
@@ -2843,34 +2948,14 @@ EXPORT_SYMBOL(iscsit_build_logout_rsp);
static int
iscsit_send_logout(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
{
- struct kvec *iov;
- int niov = 0, tx_size, rc;
+ int rc;
rc = iscsit_build_logout_rsp(cmd, conn,
(struct iscsi_logout_rsp *)&cmd->pdu[0]);
if (rc < 0)
return rc;
- tx_size = ISCSI_HDR_LEN;
- iov = &cmd->iov_misc[0];
- iov[niov].iov_base = cmd->pdu;
- iov[niov++].iov_len = ISCSI_HDR_LEN;
-
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, &cmd->pdu[0],
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- iov[0].iov_len += ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32C HeaderDigest to"
- " Logout Response 0x%08x\n", *header_digest);
- }
- cmd->iov_misc_count = niov;
- cmd->tx_size = tx_size;
-
- return 0;
+ return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
}
void
@@ -2910,34 +2995,16 @@ static int iscsit_send_unsolicited_nopin(
int want_response)
{
struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0];
- int tx_size = ISCSI_HDR_LEN, ret;
+ int ret;
iscsit_build_nopin_rsp(cmd, conn, hdr, false);
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32C HeaderDigest to"
- " NopIN 0x%08x\n", *header_digest);
- }
-
- cmd->iov_misc[0].iov_base = cmd->pdu;
- cmd->iov_misc[0].iov_len = tx_size;
- cmd->iov_misc_count = 1;
- cmd->tx_size = tx_size;
-
pr_debug("Sending Unsolicited NOPIN TTT: 0x%08x StatSN:"
" 0x%08x CID: %hu\n", hdr->ttt, cmd->stat_sn, conn->cid);
- ret = iscsit_send_tx_data(cmd, conn, 1);
- if (ret < 0) {
- iscsit_tx_thread_wait_for_tcp(conn);
+ ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
+ if (ret < 0)
return ret;
- }
spin_lock_bh(&cmd->istate_lock);
cmd->i_state = want_response ?
@@ -2951,75 +3018,24 @@ static int
iscsit_send_nopin(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
{
struct iscsi_nopin *hdr = (struct iscsi_nopin *)&cmd->pdu[0];
- struct kvec *iov;
- u32 padding = 0;
- int niov = 0, tx_size;
iscsit_build_nopin_rsp(cmd, conn, hdr, true);
- tx_size = ISCSI_HDR_LEN;
- iov = &cmd->iov_misc[0];
- iov[niov].iov_base = cmd->pdu;
- iov[niov++].iov_len = ISCSI_HDR_LEN;
-
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- iov[0].iov_len += ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32C HeaderDigest"
- " to NopIn 0x%08x\n", *header_digest);
- }
-
/*
* NOPOUT Ping Data is attached to struct iscsi_cmd->buf_ptr.
* NOPOUT DataSegmentLength is at struct iscsi_cmd->buf_ptr_size.
*/
- if (cmd->buf_ptr_size) {
- iov[niov].iov_base = cmd->buf_ptr;
- iov[niov++].iov_len = cmd->buf_ptr_size;
- tx_size += cmd->buf_ptr_size;
-
- pr_debug("Echoing back %u bytes of ping"
- " data.\n", cmd->buf_ptr_size);
-
- padding = ((-cmd->buf_ptr_size) & 3);
- if (padding != 0) {
- iov[niov].iov_base = &cmd->pad_bytes;
- iov[niov++].iov_len = padding;
- tx_size += padding;
- pr_debug("Attaching %u additional"
- " padding bytes.\n", padding);
- }
- if (conn->conn_ops->DataDigest) {
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash,
- cmd->buf_ptr, cmd->buf_ptr_size,
- padding, (u8 *)&cmd->pad_bytes,
- (u8 *)&cmd->data_crc);
-
- iov[niov].iov_base = &cmd->data_crc;
- iov[niov++].iov_len = ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attached DataDigest for %u"
- " bytes of ping data, CRC 0x%08x\n",
- cmd->buf_ptr_size, cmd->data_crc);
- }
- }
+ pr_debug("Echoing back %u bytes of ping data.\n", cmd->buf_ptr_size);
- cmd->iov_misc_count = niov;
- cmd->tx_size = tx_size;
-
- return 0;
+ return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL,
+ cmd->buf_ptr,
+ cmd->buf_ptr_size);
}
static int iscsit_send_r2t(
struct iscsi_cmd *cmd,
struct iscsi_conn *conn)
{
- int tx_size = 0;
struct iscsi_r2t *r2t;
struct iscsi_r2t_rsp *hdr;
int ret;
@@ -3035,7 +3051,10 @@ static int iscsit_send_r2t(
int_to_scsilun(cmd->se_cmd.orig_fe_lun,
(struct scsi_lun *)&hdr->lun);
hdr->itt = cmd->init_task_tag;
- r2t->targ_xfer_tag = session_get_next_ttt(conn->sess);
+ if (conn->conn_transport->iscsit_get_r2t_ttt)
+ conn->conn_transport->iscsit_get_r2t_ttt(conn, cmd, r2t);
+ else
+ r2t->targ_xfer_tag = session_get_next_ttt(conn->sess);
hdr->ttt = cpu_to_be32(r2t->targ_xfer_tag);
hdr->statsn = cpu_to_be32(conn->stat_sn);
hdr->exp_cmdsn = cpu_to_be32(conn->sess->exp_cmd_sn);
@@ -3044,38 +3063,18 @@ static int iscsit_send_r2t(
hdr->data_offset = cpu_to_be32(r2t->offset);
hdr->data_length = cpu_to_be32(r2t->xfer_len);
- cmd->iov_misc[0].iov_base = cmd->pdu;
- cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN;
- tx_size += ISCSI_HDR_LEN;
-
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32 HeaderDigest for R2T"
- " PDU 0x%08x\n", *header_digest);
- }
-
pr_debug("Built %sR2T, ITT: 0x%08x, TTT: 0x%08x, StatSN:"
" 0x%08x, R2TSN: 0x%08x, Offset: %u, DDTL: %u, CID: %hu\n",
(!r2t->recovery_r2t) ? "" : "Recovery ", cmd->init_task_tag,
r2t->targ_xfer_tag, ntohl(hdr->statsn), r2t->r2t_sn,
r2t->offset, r2t->xfer_len, conn->cid);
- cmd->iov_misc_count = 1;
- cmd->tx_size = tx_size;
-
spin_lock_bh(&cmd->r2t_lock);
r2t->sent_r2t = 1;
spin_unlock_bh(&cmd->r2t_lock);
- ret = iscsit_send_tx_data(cmd, conn, 1);
+ ret = conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
if (ret < 0) {
- iscsit_tx_thread_wait_for_tcp(conn);
return ret;
}
@@ -3166,6 +3165,7 @@ int iscsit_build_r2ts_for_cmd(
return 0;
}
+EXPORT_SYMBOL(iscsit_build_r2ts_for_cmd);
void iscsit_build_rsp_pdu(struct iscsi_cmd *cmd, struct iscsi_conn *conn,
bool inc_stat_sn, struct iscsi_scsi_rsp *hdr)
@@ -3204,18 +3204,12 @@ EXPORT_SYMBOL(iscsit_build_rsp_pdu);
static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
{
struct iscsi_scsi_rsp *hdr = (struct iscsi_scsi_rsp *)&cmd->pdu[0];
- struct kvec *iov;
- u32 padding = 0, tx_size = 0;
- int iov_count = 0;
bool inc_stat_sn = (cmd->i_state == ISTATE_SEND_STATUS);
+ void *data_buf = NULL;
+ u32 padding = 0, data_buf_len = 0;
iscsit_build_rsp_pdu(cmd, conn, inc_stat_sn, hdr);
- iov = &cmd->iov_misc[0];
- iov[iov_count].iov_base = cmd->pdu;
- iov[iov_count++].iov_len = ISCSI_HDR_LEN;
- tx_size += ISCSI_HDR_LEN;
-
/*
* Attach SENSE DATA payload to iSCSI Response PDU
*/
@@ -3227,56 +3221,23 @@ static int iscsit_send_response(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
padding = -(cmd->se_cmd.scsi_sense_length) & 3;
hton24(hdr->dlength, (u32)cmd->se_cmd.scsi_sense_length);
- iov[iov_count].iov_base = cmd->sense_buffer;
- iov[iov_count++].iov_len =
- (cmd->se_cmd.scsi_sense_length + padding);
- tx_size += cmd->se_cmd.scsi_sense_length;
+ data_buf = cmd->sense_buffer;
+ data_buf_len = cmd->se_cmd.scsi_sense_length + padding;
if (padding) {
memset(cmd->sense_buffer +
cmd->se_cmd.scsi_sense_length, 0, padding);
- tx_size += padding;
pr_debug("Adding %u bytes of padding to"
" SENSE.\n", padding);
}
- if (conn->conn_ops->DataDigest) {
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash,
- cmd->sense_buffer,
- (cmd->se_cmd.scsi_sense_length + padding),
- 0, NULL, (u8 *)&cmd->data_crc);
-
- iov[iov_count].iov_base = &cmd->data_crc;
- iov[iov_count++].iov_len = ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
-
- pr_debug("Attaching CRC32 DataDigest for"
- " SENSE, %u bytes CRC 0x%08x\n",
- (cmd->se_cmd.scsi_sense_length + padding),
- cmd->data_crc);
- }
-
pr_debug("Attaching SENSE DATA: %u bytes to iSCSI"
" Response PDU\n",
cmd->se_cmd.scsi_sense_length);
}
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->pdu,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- iov[0].iov_len += ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32 HeaderDigest for Response"
- " PDU 0x%08x\n", *header_digest);
- }
-
- cmd->iov_misc_count = iov_count;
- cmd->tx_size = tx_size;
-
- return 0;
+ return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, data_buf,
+ data_buf_len);
}
static u8 iscsit_convert_tcm_tmr_rsp(struct se_tmr_req *se_tmr)
@@ -3323,30 +3284,10 @@ static int
iscsit_send_task_mgt_rsp(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
{
struct iscsi_tm_rsp *hdr = (struct iscsi_tm_rsp *)&cmd->pdu[0];
- u32 tx_size = 0;
iscsit_build_task_mgt_rsp(cmd, conn, hdr);
- cmd->iov_misc[0].iov_base = cmd->pdu;
- cmd->iov_misc[0].iov_len = ISCSI_HDR_LEN;
- tx_size += ISCSI_HDR_LEN;
-
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32 HeaderDigest for Task"
- " Mgmt Response PDU 0x%08x\n", *header_digest);
- }
-
- cmd->iov_misc_count = 1;
- cmd->tx_size = tx_size;
-
- return 0;
+ return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL, NULL, 0);
}
static bool iscsit_check_inaddr_any(struct iscsi_np *np)
@@ -3583,53 +3524,16 @@ static int iscsit_send_text_rsp(
struct iscsi_conn *conn)
{
struct iscsi_text_rsp *hdr = (struct iscsi_text_rsp *)cmd->pdu;
- struct kvec *iov;
- u32 tx_size = 0;
- int text_length, iov_count = 0, rc;
-
- rc = iscsit_build_text_rsp(cmd, conn, hdr, ISCSI_TCP);
- if (rc < 0)
- return rc;
-
- text_length = rc;
- iov = &cmd->iov_misc[0];
- iov[iov_count].iov_base = cmd->pdu;
- iov[iov_count++].iov_len = ISCSI_HDR_LEN;
- iov[iov_count].iov_base = cmd->buf_ptr;
- iov[iov_count++].iov_len = text_length;
-
- tx_size += (ISCSI_HDR_LEN + text_length);
-
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- iov[0].iov_len += ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32 HeaderDigest for"
- " Text Response PDU 0x%08x\n", *header_digest);
- }
-
- if (conn->conn_ops->DataDigest) {
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash,
- cmd->buf_ptr, text_length,
- 0, NULL, (u8 *)&cmd->data_crc);
-
- iov[iov_count].iov_base = &cmd->data_crc;
- iov[iov_count++].iov_len = ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
-
- pr_debug("Attaching DataDigest for %u bytes of text"
- " data, CRC 0x%08x\n", text_length,
- cmd->data_crc);
- }
+ int text_length;
- cmd->iov_misc_count = iov_count;
- cmd->tx_size = tx_size;
+ text_length = iscsit_build_text_rsp(cmd, conn, hdr,
+ conn->conn_transport->transport_type);
+ if (text_length < 0)
+ return text_length;
- return 0;
+ return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL,
+ cmd->buf_ptr,
+ text_length);
}
void
@@ -3654,49 +3558,15 @@ static int iscsit_send_reject(
struct iscsi_conn *conn)
{
struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0];
- struct kvec *iov;
- u32 iov_count = 0, tx_size;
iscsit_build_reject(cmd, conn, hdr);
- iov = &cmd->iov_misc[0];
- iov[iov_count].iov_base = cmd->pdu;
- iov[iov_count++].iov_len = ISCSI_HDR_LEN;
- iov[iov_count].iov_base = cmd->buf_ptr;
- iov[iov_count++].iov_len = ISCSI_HDR_LEN;
-
- tx_size = (ISCSI_HDR_LEN + ISCSI_HDR_LEN);
-
- if (conn->conn_ops->HeaderDigest) {
- u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
-
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, hdr,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
-
- iov[0].iov_len += ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32 HeaderDigest for"
- " REJECT PDU 0x%08x\n", *header_digest);
- }
-
- if (conn->conn_ops->DataDigest) {
- iscsit_do_crypto_hash_buf(conn->conn_tx_hash, cmd->buf_ptr,
- ISCSI_HDR_LEN, 0, NULL, (u8 *)&cmd->data_crc);
-
- iov[iov_count].iov_base = &cmd->data_crc;
- iov[iov_count++].iov_len = ISCSI_CRC_LEN;
- tx_size += ISCSI_CRC_LEN;
- pr_debug("Attaching CRC32 DataDigest for REJECT"
- " PDU 0x%08x\n", cmd->data_crc);
- }
-
- cmd->iov_misc_count = iov_count;
- cmd->tx_size = tx_size;
-
pr_debug("Built Reject PDU StatSN: 0x%08x, Reason: 0x%02x,"
" CID: %hu\n", ntohl(hdr->statsn), hdr->reason, conn->cid);
- return 0;
+ return conn->conn_transport->iscsit_xmit_pdu(conn, cmd, NULL,
+ cmd->buf_ptr,
+ ISCSI_HDR_LEN);
}
void iscsit_thread_get_cpumask(struct iscsi_conn *conn)
@@ -3724,33 +3594,7 @@ void iscsit_thread_get_cpumask(struct iscsi_conn *conn)
cpumask_setall(conn->conn_cpumask);
}
-static inline void iscsit_thread_check_cpumask(
- struct iscsi_conn *conn,
- struct task_struct *p,
- int mode)
-{
- /*
- * mode == 1 signals iscsi_target_tx_thread() usage.
- * mode == 0 signals iscsi_target_rx_thread() usage.
- */
- if (mode == 1) {
- if (!conn->conn_tx_reset_cpumask)
- return;
- conn->conn_tx_reset_cpumask = 0;
- } else {
- if (!conn->conn_rx_reset_cpumask)
- return;
- conn->conn_rx_reset_cpumask = 0;
- }
- /*
- * Update the CPU mask for this single kthread so that
- * both TX and RX kthreads are scheduled to run on the
- * same CPU.
- */
- set_cpus_allowed_ptr(p, conn->conn_cpumask);
-}
-
-static int
+int
iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
{
int ret;
@@ -3792,6 +3636,7 @@ iscsit_immediate_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state
err:
return -1;
}
+EXPORT_SYMBOL(iscsit_immediate_queue);
static int
iscsit_handle_immediate_queue(struct iscsi_conn *conn)
@@ -3816,7 +3661,7 @@ iscsit_handle_immediate_queue(struct iscsi_conn *conn)
return 0;
}
-static int
+int
iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
{
int ret;
@@ -3889,13 +3734,6 @@ check_rsp_state:
if (ret < 0)
goto err;
- if (iscsit_send_tx_data(cmd, conn, 1) < 0) {
- iscsit_tx_thread_wait_for_tcp(conn);
- iscsit_unmap_iovec(cmd);
- goto err;
- }
- iscsit_unmap_iovec(cmd);
-
switch (state) {
case ISTATE_SEND_LOGOUTRSP:
if (!iscsit_logout_post_handler(cmd, conn))
@@ -3928,6 +3766,7 @@ check_rsp_state:
err:
return -1;
}
+EXPORT_SYMBOL(iscsit_response_queue);
static int iscsit_handle_response_queue(struct iscsi_conn *conn)
{
@@ -4087,36 +3926,12 @@ static bool iscsi_target_check_conn_state(struct iscsi_conn *conn)
return ret;
}
-int iscsi_target_rx_thread(void *arg)
+static void iscsit_get_rx_pdu(struct iscsi_conn *conn)
{
- int ret, rc;
+ int ret;
u8 buffer[ISCSI_HDR_LEN], opcode;
u32 checksum = 0, digest = 0;
- struct iscsi_conn *conn = arg;
struct kvec iov;
- /*
- * Allow ourselves to be interrupted by SIGINT so that a
- * connection recovery / failure event can be triggered externally.
- */
- allow_signal(SIGINT);
- /*
- * Wait for iscsi_post_login_handler() to complete before allowing
- * incoming iscsi/tcp socket I/O, and/or failing the connection.
- */
- rc = wait_for_completion_interruptible(&conn->rx_login_comp);
- if (rc < 0 || iscsi_target_check_conn_state(conn))
- return 0;
-
- if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) {
- struct completion comp;
-
- init_completion(&comp);
- rc = wait_for_completion_interruptible(&comp);
- if (rc < 0)
- goto transport_err;
-
- goto transport_err;
- }
while (!kthread_should_stop()) {
/*
@@ -4134,7 +3949,7 @@ int iscsi_target_rx_thread(void *arg)
ret = rx_data(conn, &iov, 1, ISCSI_HDR_LEN);
if (ret != ISCSI_HDR_LEN) {
iscsit_rx_thread_wait_for_tcp(conn);
- goto transport_err;
+ return;
}
if (conn->conn_ops->HeaderDigest) {
@@ -4144,7 +3959,7 @@ int iscsi_target_rx_thread(void *arg)
ret = rx_data(conn, &iov, 1, ISCSI_CRC_LEN);
if (ret != ISCSI_CRC_LEN) {
iscsit_rx_thread_wait_for_tcp(conn);
- goto transport_err;
+ return;
}
iscsit_do_crypto_hash_buf(conn->conn_rx_hash,
@@ -4168,7 +3983,7 @@ int iscsi_target_rx_thread(void *arg)
}
if (conn->conn_state == TARG_CONN_STATE_IN_LOGOUT)
- goto transport_err;
+ return;
opcode = buffer[0] & ISCSI_OPCODE_MASK;
@@ -4179,15 +3994,38 @@ int iscsi_target_rx_thread(void *arg)
" while in Discovery Session, rejecting.\n", opcode);
iscsit_add_reject(conn, ISCSI_REASON_PROTOCOL_ERROR,
buffer);
- goto transport_err;
+ return;
}
ret = iscsi_target_rx_opcode(conn, buffer);
if (ret < 0)
- goto transport_err;
+ return;
}
+}
+
+int iscsi_target_rx_thread(void *arg)
+{
+ int rc;
+ struct iscsi_conn *conn = arg;
+
+ /*
+ * Allow ourselves to be interrupted by SIGINT so that a
+ * connection recovery / failure event can be triggered externally.
+ */
+ allow_signal(SIGINT);
+ /*
+ * Wait for iscsi_post_login_handler() to complete before allowing
+ * incoming iscsi/tcp socket I/O, and/or failing the connection.
+ */
+ rc = wait_for_completion_interruptible(&conn->rx_login_comp);
+ if (rc < 0 || iscsi_target_check_conn_state(conn))
+ return 0;
+
+ if (!conn->conn_transport->iscsit_get_rx_pdu)
+ return 0;
+
+ conn->conn_transport->iscsit_get_rx_pdu(conn);
-transport_err:
if (!signal_pending(current))
atomic_set(&conn->transport_failed, 1);
iscsit_take_action_for_connection_exit(conn);
@@ -4240,16 +4078,17 @@ int iscsit_close_connection(
pr_debug("Closing iSCSI connection CID %hu on SID:"
" %u\n", conn->cid, sess->sid);
/*
- * Always up conn_logout_comp for the traditional TCP case just in case
- * the RX Thread in iscsi_target_rx_opcode() is sleeping and the logout
- * response never got sent because the connection failed.
+ * Always up conn_logout_comp for the traditional TCP and HW_OFFLOAD
+ * case just in case the RX Thread in iscsi_target_rx_opcode() is
+ * sleeping and the logout response never got sent because the
+ * connection failed.
*
* However for iser-target, isert_wait4logout() is using conn_logout_comp
* to signal logout response TX interrupt completion. Go ahead and skip
* this for iser since isert_rx_opcode() does not wait on logout failure,
* and to avoid iscsi_conn pointer dereference in iser-target code.
*/
- if (conn->conn_transport->transport_type == ISCSI_TCP)
+ if (!conn->conn_transport->rdma_shutdown)
complete(&conn->conn_logout_comp);
if (!strcmp(current->comm, ISCSI_RX_THREAD_NAME)) {
@@ -4438,7 +4277,7 @@ int iscsit_close_connection(
if (!atomic_read(&sess->session_reinstatement) &&
atomic_read(&sess->session_fall_back_to_erl0)) {
spin_unlock_bh(&sess->conn_lock);
- target_put_session(sess->se_sess);
+ iscsit_close_session(sess);
return 0;
} else if (atomic_read(&sess->session_logout)) {
@@ -4467,6 +4306,10 @@ int iscsit_close_connection(
}
}
+/*
+ * If the iSCSI Session for the iSCSI Initiator Node exists,
+ * forcefully shutdown the iSCSI NEXUS.
+ */
int iscsit_close_session(struct iscsi_session *sess)
{
struct iscsi_portal_group *tpg = sess->tpg;
@@ -4556,7 +4399,7 @@ static void iscsit_logout_post_handler_closesession(
* always sleep waiting for RX/TX thread shutdown to complete
* within iscsit_close_connection().
*/
- if (conn->conn_transport->transport_type == ISCSI_TCP)
+ if (!conn->conn_transport->rdma_shutdown)
sleep = cmpxchg(&conn->tx_thread_active, true, false);
atomic_set(&conn->conn_logout_remove, 0);
@@ -4565,7 +4408,7 @@ static void iscsit_logout_post_handler_closesession(
iscsit_dec_conn_usage_count(conn);
iscsit_stop_session(sess, sleep, sleep);
iscsit_dec_session_usage_count(sess);
- target_put_session(sess->se_sess);
+ iscsit_close_session(sess);
}
static void iscsit_logout_post_handler_samecid(
@@ -4573,7 +4416,7 @@ static void iscsit_logout_post_handler_samecid(
{
int sleep = 1;
- if (conn->conn_transport->transport_type == ISCSI_TCP)
+ if (!conn->conn_transport->rdma_shutdown)
sleep = cmpxchg(&conn->tx_thread_active, true, false);
atomic_set(&conn->conn_logout_remove, 0);
@@ -4736,7 +4579,7 @@ int iscsit_free_session(struct iscsi_session *sess)
} else
spin_unlock_bh(&sess->conn_lock);
- target_put_session(sess->se_sess);
+ iscsit_close_session(sess);
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-28 18:57:53 +0000