From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
This patch refactors existing traditional iscsi RX side PDU handling
to use iscsit_transport, and exports the necessary logic for external
transport modules.
This includes:
- Refactor iscsit_handle_scsi_cmd() into PDU setup / processing
- Add updated iscsit_handle_scsi_cmd() for tradtional iscsi code
- Add iscsit_set_unsoliticed_dataout() wrapper
- Refactor iscsit_handle_data_out() into PDU check / processing
- Add updated iscsit_handle_data_out() for tradtional iscsi code
- Add iscsit_handle_nop_out() + iscsit_handle_task_mgt_cmd() to
accept pre-allocated struct iscsi_cmd
- Add iscsit_build_r2ts_for_cmd() RDMAExtentions check to
post ISTATE_SEND_R2T to TX immediate queue to start RDMA READ
- Refactor main traditional iscsi iscsi_target_rx_thread() PDU switch
into iscsi_target_rx_opcode() using iscsit_allocate_cmd()
- Turn iscsi_target_rx_thread() process context into NOP for
ib_isert side work-queue.
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
---
drivers/target/iscsi/iscsi_target.c | 463 +++++++++++++++++++-----------
drivers/target/iscsi/iscsi_target.h | 1 +
drivers/target/iscsi/iscsi_target_erl1.c | 8 +-
drivers/target/iscsi/iscsi_target_util.c | 1 +
4 files changed, 295 insertions(+), 178 deletions(-)
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index 9cd7b7b..fbdc75a 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -703,6 +703,7 @@ int iscsit_add_reject_from_cmd(
return (!fail_conn) ? 0 : -1;
}
+EXPORT_SYMBOL(iscsit_add_reject_from_cmd);
/*
* Map some portion of the allocated scatterlist to an iovec, suitable for
@@ -793,12 +794,10 @@ static int iscsit_allocate_iovecs(struct iscsi_cmd *cmd)
return 0;
}
-static int iscsit_handle_scsi_cmd(
- struct iscsi_conn *conn,
- unsigned char *buf)
+int iscsit_setup_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ unsigned char *buf)
{
- int data_direction, payload_length, cmdsn_ret = 0, immed_ret;
- struct iscsi_cmd *cmd = NULL;
+ int data_direction, payload_length;
struct iscsi_scsi_req *hdr;
int iscsi_task_attr;
int sam_task_attr;
@@ -821,8 +820,8 @@ static int iscsit_handle_scsi_cmd(
!(hdr->flags & ISCSI_FLAG_CMD_FINAL)) {
pr_err("ISCSI_FLAG_CMD_WRITE & ISCSI_FLAG_CMD_FINAL"
" not set. Bad iSCSI Initiator.\n");
- return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID,
+ 1, 1, buf, cmd);
}
if (((hdr->flags & ISCSI_FLAG_CMD_READ) ||
@@ -842,8 +841,8 @@ static int iscsit_handle_scsi_cmd(
pr_err("ISCSI_FLAG_CMD_READ or ISCSI_FLAG_CMD_WRITE"
" set when Expected Data Transfer Length is 0 for"
" CDB: 0x%02x. Bad iSCSI Initiator.\n", hdr->cdb[0]);
- return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID,
+ 1, 1, buf, cmd);
}
done:
@@ -852,29 +851,29 @@ done:
pr_err("ISCSI_FLAG_CMD_READ and/or ISCSI_FLAG_CMD_WRITE"
" MUST be set if Expected Data Transfer Length is not 0."
" Bad iSCSI Initiator\n");
- return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID,
+ 1, 1, buf, cmd);
}
if ((hdr->flags & ISCSI_FLAG_CMD_READ) &&
(hdr->flags & ISCSI_FLAG_CMD_WRITE)) {
pr_err("Bidirectional operations not supported!\n");
- return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID,
+ 1, 1, buf, cmd);
}
if (hdr->opcode & ISCSI_OP_IMMEDIATE) {
pr_err("Illegally set Immediate Bit in iSCSI Initiator"
" Scsi Command PDU.\n");
- return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID,
+ 1, 1, buf, cmd);
}
if (payload_length && !conn->sess->sess_ops->ImmediateData) {
pr_err("ImmediateData=No but DataSegmentLength=%u,"
" protocol error.\n", payload_length);
- return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 1, buf, cmd);
}
if ((be32_to_cpu(hdr->data_length )== payload_length) &&
@@ -882,43 +881,38 @@ done:
pr_err("Expected Data Transfer Length and Length of"
" Immediate Data are the same, but ISCSI_FLAG_CMD_FINAL"
" bit is not set protocol error\n");
- return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 1, buf, cmd);
}
if (payload_length > be32_to_cpu(hdr->data_length)) {
pr_err("DataSegmentLength: %u is greater than"
" EDTL: %u, protocol error.\n", payload_length,
hdr->data_length);
- return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 1, buf, cmd);
}
if (payload_length > conn->conn_ops->MaxXmitDataSegmentLength) {
pr_err("DataSegmentLength: %u is greater than"
" MaxXmitDataSegmentLength: %u, protocol error.\n",
payload_length, conn->conn_ops->MaxXmitDataSegmentLength);
- return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 1, buf, cmd);
}
if (payload_length > conn->sess->sess_ops->FirstBurstLength) {
pr_err("DataSegmentLength: %u is greater than"
" FirstBurstLength: %u, protocol error.\n",
payload_length, conn->sess->sess_ops->FirstBurstLength);
- return iscsit_add_reject(ISCSI_REASON_BOOKMARK_INVALID, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_BOOKMARK_INVALID,
+ 1, 1, buf, cmd);
}
data_direction = (hdr->flags & ISCSI_FLAG_CMD_WRITE) ? DMA_TO_DEVICE :
(hdr->flags & ISCSI_FLAG_CMD_READ) ? DMA_FROM_DEVICE :
DMA_NONE;
- cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
- if (!cmd)
- return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1,
- buf, conn);
-
cmd->data_direction = data_direction;
iscsi_task_attr = hdr->flags & ISCSI_FLAG_CMD_ATTR_MASK;
/*
@@ -983,7 +977,8 @@ done:
pr_debug("Got SCSI Command, ITT: 0x%08x, CmdSN: 0x%08x,"
" ExpXferLen: %u, Length: %u, CID: %hu\n", hdr->itt,
- hdr->cmdsn, hdr->data_length, payload_length, conn->cid);
+ hdr->cmdsn, be32_to_cpu(hdr->data_length), payload_length,
+ conn->cid);
cmd->sense_reason = transport_lookup_cmd_lun(&cmd->se_cmd,
scsilun_to_int(&hdr->lun));
@@ -1017,12 +1012,24 @@ attach_cmd:
*/
core_alua_check_nonop_delay(&cmd->se_cmd);
- if (iscsit_allocate_iovecs(cmd) < 0) {
- return iscsit_add_reject_from_cmd(
- ISCSI_REASON_BOOKMARK_NO_RESOURCES,
- 1, 0, buf, cmd);
- }
+ return 0;
+}
+EXPORT_SYMBOL(iscsit_setup_scsi_cmd);
+void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *cmd)
+{
+ iscsit_set_dataout_sequence_values(cmd);
+
+ spin_lock_bh(&cmd->dataout_timeout_lock);
+ iscsit_start_dataout_timer(cmd, cmd->conn);
+ spin_unlock_bh(&cmd->dataout_timeout_lock);
+}
+EXPORT_SYMBOL(iscsit_set_unsoliticed_dataout);
+
+int iscsit_process_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ struct iscsi_scsi_req *hdr)
+{
+ int cmdsn_ret = 0;
/*
* Check the CmdSN against ExpCmdSN/MaxCmdSN here if
* the Immediate Bit is not set, and no Immediate
@@ -1040,7 +1047,7 @@ attach_cmd:
else if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
return iscsit_add_reject_from_cmd(
ISCSI_REASON_PROTOCOL_ERROR,
- 1, 0, buf, cmd);
+ 1, 0, (unsigned char *)hdr, cmd);
}
iscsit_ack_from_expstatsn(conn, be32_to_cpu(hdr->exp_statsn));
@@ -1049,13 +1056,8 @@ attach_cmd:
* If no Immediate Data is attached, it's OK to return now.
*/
if (!cmd->immediate_data) {
- if (!cmd->sense_reason && cmd->unsolicited_data) {
- iscsit_set_dataout_sequence_values(cmd);
-
- spin_lock_bh(&cmd->dataout_timeout_lock);
- iscsit_start_dataout_timer(cmd, cmd->conn);
- spin_unlock_bh(&cmd->dataout_timeout_lock);
- }
+ if (!cmd->sense_reason && cmd->unsolicited_data)
+ iscsit_set_unsoliticed_dataout(cmd);
return 0;
}
@@ -1065,21 +1067,33 @@ attach_cmd:
* thread. They are processed in CmdSN order by
* iscsit_check_received_cmdsn() below.
*/
- if (cmd->sense_reason) {
- immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION;
- goto after_immediate_data;
- }
+ if (cmd->sense_reason)
+ return 1;
/*
* Call directly into transport_generic_new_cmd() to perform
* the backend memory allocation.
*/
cmd->sense_reason = transport_generic_new_cmd(&cmd->se_cmd);
- if (cmd->sense_reason) {
- immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION;
+ if (cmd->sense_reason)
+ return 1;
+
+ return 0;
+}
+EXPORT_SYMBOL(iscsit_process_scsi_cmd);
+
+static int
+iscsit_get_immediate_data(struct iscsi_cmd *cmd, struct iscsi_scsi_req *hdr,
+ bool dump_payload)
+{
+ int cmdsn_ret = 0, immed_ret = IMMEDIATE_DATA_NORMAL_OPERATION;
+ /*
+ * Special case for Unsupported SAM WRITE Opcodes and ImmediateData=Yes.
+ */
+ if (dump_payload == true)
goto after_immediate_data;
- }
- immed_ret = iscsit_handle_immediate_data(cmd, buf, payload_length);
+ immed_ret = iscsit_handle_immediate_data(cmd, hdr,
+ cmd->first_burst_len);
after_immediate_data:
if (immed_ret == IMMEDIATE_DATA_NORMAL_OPERATION) {
/*
@@ -1087,26 +1101,19 @@ after_immediate_data:
* DataCRC, check against ExpCmdSN/MaxCmdSN if
* Immediate Bit is not set.
*/
- cmdsn_ret = iscsit_sequence_cmd(conn, cmd, hdr->cmdsn);
- /*
- * Special case for Unsupported SAM WRITE Opcodes
- * and ImmediateData=Yes.
- */
+ cmdsn_ret = iscsit_sequence_cmd(cmd->conn, cmd, hdr->cmdsn);
+
if (cmd->sense_reason) {
- if (iscsit_dump_data_payload(conn, payload_length, 1) < 0)
+ if (iscsit_dump_data_payload(cmd->conn,
+ cmd->first_burst_len, 1) < 0)
return -1;
- } else if (cmd->unsolicited_data) {
- iscsit_set_dataout_sequence_values(cmd);
-
- spin_lock_bh(&cmd->dataout_timeout_lock);
- iscsit_start_dataout_timer(cmd, cmd->conn);
- spin_unlock_bh(&cmd->dataout_timeout_lock);
- }
+ } else if (cmd->unsolicited_data)
+ iscsit_set_unsoliticed_dataout(cmd);
if (cmdsn_ret == CMDSN_ERROR_CANNOT_RECOVER)
return iscsit_add_reject_from_cmd(
ISCSI_REASON_PROTOCOL_ERROR,
- 1, 0, buf, cmd);
+ 1, 0, (unsigned char *)hdr, cmd);
} else if (immed_ret == IMMEDIATE_DATA_ERL1_CRC_FAILURE) {
/*
@@ -1121,13 +1128,46 @@ after_immediate_data:
* CmdSN and issue a retry to plug the sequence.
*/
cmd->i_state = ISTATE_REMOVE;
- iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state);
+ iscsit_add_cmd_to_immediate_queue(cmd, cmd->conn, cmd->i_state);
} else /* immed_ret == IMMEDIATE_DATA_CANNOT_RECOVER */
return -1;
return 0;
}
+int iscsit_handle_scsi_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ unsigned char *buf)
+{
+ struct iscsi_scsi_req *hdr = (struct iscsi_scsi_req *)buf;
+ int rc, immed_data;
+ bool dump_payload = false;
+
+ rc = iscsit_setup_scsi_cmd(conn, cmd, buf);
+ if (rc < 0)
+ return rc;
+ /*
+ * Allocation iovecs needed for struct socket operations for
+ * traditional iSCSI block I/O.
+ */
+ if (iscsit_allocate_iovecs(cmd) < 0) {
+ return iscsit_add_reject_from_cmd(
+ ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, 0, buf, cmd);
+ }
+ immed_data = cmd->immediate_data;
+
+ rc = iscsit_process_scsi_cmd(conn, cmd, hdr);
+ if (rc < 0)
+ return rc;
+ else if (rc > 0)
+ dump_payload = true;
+
+ if (!immed_data)
+ return 0;
+
+ return iscsit_get_immediate_data(cmd, hdr, cmd->first_burst_len);
+}
+
static u32 iscsit_do_crypto_hash_sg(
struct hash_desc *hash,
struct iscsi_cmd *cmd,
@@ -1190,20 +1230,16 @@ static void iscsit_do_crypto_hash_buf(
crypto_hash_final(hash, data_crc);
}
-static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
+int
+iscsit_check_dataout_hdr(struct iscsi_conn *conn, unsigned char *buf,
+ struct iscsi_cmd **out_cmd)
{
- int iov_ret, ooo_cmdsn = 0, ret;
- u8 data_crc_failed = 0;
- u32 checksum, iov_count = 0, padding = 0, rx_got = 0;
- u32 rx_size = 0, payload_length;
+ struct iscsi_data *hdr = (struct iscsi_data *)buf;
struct iscsi_cmd *cmd = NULL;
struct se_cmd *se_cmd;
- struct iscsi_data *hdr;
- struct kvec *iov;
unsigned long flags;
-
- hdr = (struct iscsi_data *) buf;
- payload_length = ntoh24(hdr->dlength);
+ u32 payload_length = ntoh24(hdr->dlength);
+ int rc;
if (!payload_length) {
pr_err("DataOUT payload is ZERO, protocol error.\n");
@@ -1236,7 +1272,7 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
pr_debug("Got DataOut ITT: 0x%08x, TTT: 0x%08x,"
" DataSN: 0x%08x, Offset: %u, Length: %u, CID: %hu\n",
- hdr->itt, hdr->ttt, hdr->datasn, hdr->offset,
+ hdr->itt, hdr->ttt, hdr->datasn, ntohl(hdr->offset),
payload_length, conn->cid);
if (cmd->cmd_flags & ICF_GOT_LAST_DATAOUT) {
@@ -1328,12 +1364,26 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
* Preform DataSN, DataSequenceInOrder, DataPDUInOrder, and
* within-command recovery checks before receiving the payload.
*/
- ret = iscsit_check_pre_dataout(cmd, buf);
- if (ret == DATAOUT_WITHIN_COMMAND_RECOVERY)
+ rc = iscsit_check_pre_dataout(cmd, buf);
+ if (rc == DATAOUT_WITHIN_COMMAND_RECOVERY)
return 0;
- else if (ret == DATAOUT_CANNOT_RECOVER)
+ else if (rc == DATAOUT_CANNOT_RECOVER)
return -1;
+ *out_cmd = cmd;
+ return 0;
+}
+EXPORT_SYMBOL(iscsit_check_dataout_hdr);
+
+static int
+iscsit_get_dataout(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ struct iscsi_data *hdr)
+{
+ struct kvec *iov;
+ u32 checksum, iov_count = 0, padding = 0, rx_got = 0, rx_size = 0;
+ u32 payload_length = ntoh24(hdr->dlength);
+ int iov_ret, data_crc_failed = 0;
+
rx_size += payload_length;
iov = &cmd->iov_data[0];
@@ -1386,17 +1436,27 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
payload_length);
}
}
+
+ return data_crc_failed;
+}
+
+int
+iscsit_check_dataout_payload(struct iscsi_cmd *cmd, struct iscsi_data *hdr,
+ bool data_crc_failed)
+{
+ struct iscsi_conn *conn = cmd->conn;
+ int rc, ooo_cmdsn;
/*
* Increment post receive data and CRC values or perform
* within-command recovery.
*/
- ret = iscsit_check_post_dataout(cmd, buf, data_crc_failed);
- if ((ret == DATAOUT_NORMAL) || (ret == DATAOUT_WITHIN_COMMAND_RECOVERY))
+ rc = iscsit_check_post_dataout(cmd, (unsigned char *)hdr, data_crc_failed);
+ if ((rc == DATAOUT_NORMAL) || (rc == DATAOUT_WITHIN_COMMAND_RECOVERY))
return 0;
- else if (ret == DATAOUT_SEND_R2T) {
+ else if (rc == DATAOUT_SEND_R2T) {
iscsit_set_dataout_sequence_values(cmd);
iscsit_build_r2ts_for_cmd(cmd, conn, false);
- } else if (ret == DATAOUT_SEND_TO_TRANSPORT) {
+ } else if (rc == DATAOUT_SEND_TO_TRANSPORT) {
/*
* Handle extra special case for out of order
* Unsolicited Data Out.
@@ -1417,15 +1477,37 @@ static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
return 0;
}
+EXPORT_SYMBOL(iscsit_check_dataout_payload);
-static int iscsit_handle_nop_out(
- struct iscsi_conn *conn,
- unsigned char *buf)
+static int iscsit_handle_data_out(struct iscsi_conn *conn, unsigned char *buf)
+{
+ struct iscsi_cmd *cmd;
+ struct iscsi_data *hdr = (struct iscsi_data *)buf;
+ int rc;
+ bool data_crc_failed = false;
+
+ rc = iscsit_check_dataout_hdr(conn, buf, &cmd);
+ if (rc < 0)
+ return rc;
+ else if (!cmd)
+ return 0;
+
+ rc = iscsit_get_dataout(conn, cmd, hdr);
+ if (rc < 0)
+ return rc;
+ else if (rc > 0)
+ data_crc_failed = true;
+
+ return iscsit_check_dataout_payload(cmd, hdr, data_crc_failed);
+}
+
+int iscsit_handle_nop_out(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ unsigned char *buf)
{
unsigned char *ping_data = NULL;
int cmdsn_ret, niov = 0, ret = 0, rx_got, rx_size;
u32 checksum, data_crc, padding = 0, payload_length;
- struct iscsi_cmd *cmd = NULL;
+ struct iscsi_cmd *cmd_p = NULL;
struct kvec *iov = NULL;
struct iscsi_nopout *hdr;
@@ -1448,7 +1530,7 @@ static int iscsit_handle_nop_out(
buf, conn);
}
- pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%09x,"
+ pr_debug("Got NOPOUT Ping %s ITT: 0x%08x, TTT: 0x%08x,"
" CmdSN: 0x%08x, ExpStatSN: 0x%08x, Length: %u\n",
hdr->itt == RESERVED_ITT ? "Response" : "Request",
hdr->itt, hdr->ttt, hdr->cmdsn, hdr->exp_statsn,
@@ -1461,7 +1543,6 @@ static int iscsit_handle_nop_out(
* can contain ping data.
*/
if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) {
- cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
if (!cmd)
return iscsit_add_reject(
ISCSI_REASON_BOOKMARK_NO_RESOURCES,
@@ -1596,14 +1677,14 @@ static int iscsit_handle_nop_out(
/*
* This was a response to a unsolicited NOPIN ping.
*/
- cmd = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt));
- if (!cmd)
+ cmd_p = iscsit_find_cmd_from_ttt(conn, be32_to_cpu(hdr->ttt));
+ if (!cmd_p)
return -1;
iscsit_stop_nopin_response_timer(conn);
- cmd->i_state = ISTATE_REMOVE;
- iscsit_add_cmd_to_immediate_queue(cmd, conn, cmd->i_state);
+ cmd_p->i_state = ISTATE_REMOVE;
+ iscsit_add_cmd_to_immediate_queue(cmd_p, conn, cmd_p->i_state);
iscsit_start_nopin_timer(conn);
} else {
/*
@@ -1627,12 +1708,12 @@ ping_out:
kfree(ping_data);
return ret;
}
+EXPORT_SYMBOL(iscsit_handle_nop_out);
-static int iscsit_handle_task_mgt_cmd(
- struct iscsi_conn *conn,
- unsigned char *buf)
+int
+iscsit_handle_task_mgt_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ unsigned char *buf)
{
- struct iscsi_cmd *cmd;
struct se_tmr_req *se_tmr;
struct iscsi_tmr_req *tmr_req;
struct iscsi_tm *hdr;
@@ -1661,18 +1742,13 @@ static int iscsit_handle_task_mgt_cmd(
pr_err("Task Management Request TASK_REASSIGN not"
" issued as immediate command, bad iSCSI Initiator"
"implementation\n");
- return iscsit_add_reject(ISCSI_REASON_PROTOCOL_ERROR, 1,
- buf, conn);
+ return iscsit_add_reject_from_cmd(ISCSI_REASON_PROTOCOL_ERROR,
+ 1, 1, buf, cmd);
}
if ((function != ISCSI_TM_FUNC_ABORT_TASK) &&
be32_to_cpu(hdr->refcmdsn) != ISCSI_RESERVED_TAG)
hdr->refcmdsn = cpu_to_be32(ISCSI_RESERVED_TAG);
- cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
- if (!cmd)
- return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES,
- 1, buf, conn);
-
cmd->data_direction = DMA_NONE;
cmd->tmr_req = kzalloc(sizeof(struct iscsi_tmr_req), GFP_KERNEL);
@@ -1843,6 +1919,7 @@ attach:
iscsit_add_cmd_to_response_queue(cmd, conn, cmd->i_state);
return 0;
}
+EXPORT_SYMBOL(iscsit_handle_task_mgt_cmd);
/* #warning FIXME: Support Text Command parameters besides SendTargets */
static int iscsit_handle_text_cmd(
@@ -2105,13 +2182,12 @@ int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *cmd, struct iscsi_conn
return 0;
}
-static int iscsit_handle_logout_cmd(
- struct iscsi_conn *conn,
- unsigned char *buf)
+int
+iscsit_handle_logout_cmd(struct iscsi_conn *conn, struct iscsi_cmd *cmd,
+ unsigned char *buf)
{
int cmdsn_ret, logout_remove = 0;
u8 reason_code = 0;
- struct iscsi_cmd *cmd;
struct iscsi_logout *hdr;
struct iscsi_tiqn *tiqn = iscsit_snmp_get_tiqn(conn);
@@ -2135,14 +2211,10 @@ static int iscsit_handle_logout_cmd(
if (conn->conn_state != TARG_CONN_STATE_LOGGED_IN) {
pr_err("Received logout request on connection that"
" is not in logged in state, ignoring request.\n");
+ iscsit_release_cmd(cmd);
return 0;
}
- cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
- if (!cmd)
- return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES, 1,
- buf, conn);
-
cmd->iscsi_opcode = ISCSI_OP_LOGOUT;
cmd->i_state = ISTATE_SEND_LOGOUTRSP;
cmd->immediate_cmd = ((hdr->opcode & ISCSI_OP_IMMEDIATE) ? 1 : 0);
@@ -2192,6 +2264,7 @@ static int iscsit_handle_logout_cmd(
return logout_remove;
}
+EXPORT_SYMBOL(iscsit_handle_logout_cmd);
static int iscsit_handle_snack(
struct iscsi_conn *conn,
@@ -2259,7 +2332,7 @@ static void iscsit_rx_thread_wait_for_tcp(struct iscsi_conn *conn)
static int iscsit_handle_immediate_data(
struct iscsi_cmd *cmd,
- unsigned char *buf,
+ struct iscsi_scsi_req *hdr,
u32 length)
{
int iov_ret, rx_got = 0, rx_size = 0;
@@ -2315,12 +2388,12 @@ static int iscsit_handle_immediate_data(
" in ERL=0.\n");
iscsit_add_reject_from_cmd(
ISCSI_REASON_DATA_DIGEST_ERROR,
- 1, 0, buf, cmd);
+ 1, 0, (unsigned char *)hdr, cmd);
return IMMEDIATE_DATA_CANNOT_RECOVER;
} else {
iscsit_add_reject_from_cmd(
ISCSI_REASON_DATA_DIGEST_ERROR,
- 0, 0, buf, cmd);
+ 0, 0, (unsigned char *)hdr, cmd);
return IMMEDIATE_DATA_ERL1_CRC_FAILURE;
}
} else {
@@ -2962,6 +3035,12 @@ int iscsit_build_r2ts_for_cmd(
int first_r2t = 1;
u32 offset = 0, xfer_len = 0;
+ if (conn->sess->sess_ops->RDMAExtentions) {
+ iscsit_stop_dataout_timer(cmd);
+ iscsit_add_cmd_to_immediate_queue(cmd, conn, ISTATE_SEND_R2T);
+ return 0;
+ }
+
spin_lock_bh(&cmd->r2t_lock);
if (cmd->cmd_flags & ICF_SENT_LAST_R2T) {
spin_unlock_bh(&cmd->r2t_lock);
@@ -3751,6 +3830,83 @@ out:
return 0;
}
+static int iscsi_target_rx_opcode(struct iscsi_conn *conn, unsigned char *buf)
+{
+ struct iscsi_hdr *hdr = (struct iscsi_hdr *)buf;
+ struct iscsi_cmd *cmd;
+ int ret = 0;
+
+ switch (hdr->opcode & ISCSI_OPCODE_MASK) {
+ case ISCSI_OP_SCSI_CMD:
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, buf, conn);
+
+ ret = iscsit_handle_scsi_cmd(conn, cmd, buf);
+ break;
+ case ISCSI_OP_SCSI_DATA_OUT:
+ ret = iscsit_handle_data_out(conn, buf);
+ break;
+ case ISCSI_OP_NOOP_OUT:
+ cmd = NULL;
+ if (hdr->ttt == cpu_to_be32(0xFFFFFFFF)) {
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, buf, conn);
+ }
+ ret = iscsit_handle_nop_out(conn, cmd, buf);
+ break;
+ case ISCSI_OP_SCSI_TMFUNC:
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, buf, conn);
+
+ ret = iscsit_handle_task_mgt_cmd(conn, cmd, buf);
+ break;
+ case ISCSI_OP_TEXT:
+ ret = iscsit_handle_text_cmd(conn, buf);
+ break;
+ case ISCSI_OP_LOGOUT:
+ cmd = iscsit_allocate_cmd(conn, GFP_KERNEL);
+ if (!cmd)
+ return iscsit_add_reject(ISCSI_REASON_BOOKMARK_NO_RESOURCES,
+ 1, buf, conn);
+
+ ret = iscsit_handle_logout_cmd(conn, cmd, buf);
+ if (ret > 0)
+ wait_for_completion_timeout(&conn->conn_logout_comp,
+ SECONDS_FOR_LOGOUT_COMP * HZ);
+ break;
+ case ISCSI_OP_SNACK:
+ ret = iscsit_handle_snack(conn, buf);
+ break;
+ default:
+ pr_err("Got unknown iSCSI OpCode: 0x%02x\n", hdr->opcode);
+ if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
+ pr_err("Cannot recover from unknown"
+ " opcode while ERL=0, closing iSCSI connection.\n");
+ return -1;
+ }
+ if (!conn->conn_ops->OFMarker) {
+ pr_err("Unable to recover from unknown"
+ " opcode while OFMarker=No, closing iSCSI"
+ " connection.\n");
+ return -1;
+ }
+ if (iscsit_recover_from_unknown_opcode(conn) < 0) {
+ pr_err("Unable to recover from unknown"
+ " opcode, closing iSCSI connection.\n");
+ return -1;
+ }
+ break;
+ }
+
+ return ret;
+}
+
int iscsi_target_rx_thread(void *arg)
{
int ret;
@@ -3770,6 +3926,18 @@ restart:
if (!conn)
goto out;
+ if (conn->conn_transport->transport_type == ISCSI_INFINIBAND) {
+ struct completion comp;
+ int rc;
+
+ init_completion(&comp);
+ rc = wait_for_completion_interruptible(&comp);
+ if (rc < 0)
+ goto transport_err;
+
+ goto out;
+ }
+
while (!kthread_should_stop()) {
/*
* Ensure that both TX and RX per connection kthreads
@@ -3841,62 +4009,9 @@ restart:
goto transport_err;
}
- switch (opcode) {
- case ISCSI_OP_SCSI_CMD:
- if (iscsit_handle_scsi_cmd(conn, buffer) < 0)
- goto transport_err;
- break;
- case ISCSI_OP_SCSI_DATA_OUT:
- if (iscsit_handle_data_out(conn, buffer) < 0)
- goto transport_err;
- break;
- case ISCSI_OP_NOOP_OUT:
- if (iscsit_handle_nop_out(conn, buffer) < 0)
- goto transport_err;
- break;
- case ISCSI_OP_SCSI_TMFUNC:
- if (iscsit_handle_task_mgt_cmd(conn, buffer) < 0)
- goto transport_err;
- break;
- case ISCSI_OP_TEXT:
- if (iscsit_handle_text_cmd(conn, buffer) < 0)
- goto transport_err;
- break;
- case ISCSI_OP_LOGOUT:
- ret = iscsit_handle_logout_cmd(conn, buffer);
- if (ret > 0) {
- wait_for_completion_timeout(&conn->conn_logout_comp,
- SECONDS_FOR_LOGOUT_COMP * HZ);
- goto transport_err;
- } else if (ret < 0)
- goto transport_err;
- break;
- case ISCSI_OP_SNACK:
- if (iscsit_handle_snack(conn, buffer) < 0)
- goto transport_err;
- break;
- default:
- pr_err("Got unknown iSCSI OpCode: 0x%02x\n",
- opcode);
- if (!conn->sess->sess_ops->ErrorRecoveryLevel) {
- pr_err("Cannot recover from unknown"
- " opcode while ERL=0, closing iSCSI connection"
- ".\n");
- goto transport_err;
- }
- if (!conn->conn_ops->OFMarker) {
- pr_err("Unable to recover from unknown"
- " opcode while OFMarker=No, closing iSCSI"
- " connection.\n");
- goto transport_err;
- }
- if (iscsit_recover_from_unknown_opcode(conn) < 0) {
- pr_err("Unable to recover from unknown"
- " opcode, closing iSCSI connection.\n");
- goto transport_err;
- }
- break;
- }
+ ret = iscsi_target_rx_opcode(conn, buffer);
+ if (ret < 0)
+ goto transport_err;
}
transport_err:
diff --git a/drivers/target/iscsi/iscsi_target.h b/drivers/target/iscsi/iscsi_target.h
index b1a1e63..97c8c94 100644
--- a/drivers/target/iscsi/iscsi_target.h
+++ b/drivers/target/iscsi/iscsi_target.h
@@ -16,6 +16,7 @@ extern int iscsit_reset_np_thread(struct iscsi_np *, struct iscsi_tpg_np *,
struct iscsi_portal_group *);
extern int iscsit_del_np(struct iscsi_np *);
extern int iscsit_add_reject_from_cmd(u8, int, int, unsigned char *, struct iscsi_cmd *);
+extern void iscsit_set_unsoliticed_dataout(struct iscsi_cmd *);
extern int iscsit_logout_closesession(struct iscsi_cmd *, struct iscsi_conn *);
extern int iscsit_logout_closeconnection(struct iscsi_cmd *, struct iscsi_conn *);
extern int iscsit_logout_removeconnforrecovery(struct iscsi_cmd *, struct iscsi_conn *);
diff --git a/drivers/target/iscsi/iscsi_target_erl1.c b/drivers/target/iscsi/iscsi_target_erl1.c
index 0b52a23..8bf9d6d 100644
--- a/drivers/target/iscsi/iscsi_target_erl1.c
+++ b/drivers/target/iscsi/iscsi_target_erl1.c
@@ -53,6 +53,9 @@ int iscsit_dump_data_payload(
u32 length, padding, offset = 0, size;
struct kvec iov;
+ if (conn->sess->sess_ops->RDMAExtentions)
+ return 0;
+
length = (buf_len > OFFLOAD_BUF_SIZE) ? OFFLOAD_BUF_SIZE : buf_len;
buf = kzalloc(length, GFP_ATOMIC);
@@ -999,10 +1002,7 @@ int iscsit_execute_cmd(struct iscsi_cmd *cmd, int ooo)
if (transport_check_aborted_status(se_cmd, 1) != 0)
return 0;
- iscsit_set_dataout_sequence_values(cmd);
- spin_lock_bh(&cmd->dataout_timeout_lock);
- iscsit_start_dataout_timer(cmd, cmd->conn);
- spin_unlock_bh(&cmd->dataout_timeout_lock);
+ iscsit_set_unsoliticed_dataout(cmd);
}
return transport_handle_cdb_direct(&cmd->se_cmd);
diff --git a/drivers/target/iscsi/iscsi_target_util.c b/drivers/target/iscsi/iscsi_target_util.c
index 4a86034..e547277 100644
--- a/drivers/target/iscsi/iscsi_target_util.c
+++ b/drivers/target/iscsi/iscsi_target_util.c
@@ -316,6 +316,7 @@ int iscsit_sequence_cmd(
return ret;
}
+EXPORT_SYMBOL(iscsit_sequence_cmd);
int iscsit_check_unsolicited_dataout(struct iscsi_cmd *cmd, unsigned char *buf)
{
--
1.7.2.5
--
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