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iscsi-target: Refactor TX queue logic + export response PDU creation

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This patch refactors TX immediate + response queue handling to use
the new iscsit_transport API callers, and exports the necessary
traditional iscsi PDU response creation functions for iser-target
to utilize.

This includes:

- Add iscsit_build_datain_pdu() for DATAIN PDU init + convert
  iscsit_build_datain_pdu()
- Add iscsit_build_logout_rsp() for LOGOUT_RSP PDU init + convert
  iscsit_send_logout()
- Add iscsit_build_nopin_rsp() for NOPIN_RSP PDU init + convert
  iscsit_send_nopin()
- Add iscsit_build_rsp_pdu() for SCSI_RSP PDU init + convert
  iscsit_send_response()
- Add iscsit_build_task_mgt_rsp for TM_RSP PDU init + convert
  iscsit_send_task_mgt_rsp()
- Refactor immediate queue state switch into iscsit_immediate_queue()
- Convert handle_immediate_queue() to use iscsit_transport caller
- Refactor response queue state switch into iscsit_response_queue()
- Convert handle_response_queue to use iscsit_transport caller
- Export iscsit_logout_post_handler(), iscsit_increment_maxcmdsn()
  and iscsit_tmr_post_handler() for external transport module usage

v5 changes:

- Fix solicited NopIN handling with RDMAExtensions=No (nab)

v3 changes:
- Add iscsit_build_reject for REJECT PDU init + convert
  iscsit_send_reject()

v2 changes:

- Add iscsit_queue_rsp() for iscsit_transport->iscsit_queue_data_in()
  and iscsit_transport->iscsit_queue_status()
- Update lio_queue_data_in() to use ->iscsit_queue_data_in()
- Update lio_queue_status() to use ->iscsit_queue_status()
- Use mutex_trylock() in iscsit_increment_maxcmdsn()

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger
2013-03-20 15:29:15 -07:00
parent 3e1c81a95f
commit 2ec5a8c118
4 changed files with 374 additions and 308 deletions
Download Patch File Download Diff File Expand all files Collapse all files

667
drivers/target/iscsi/iscsi_target.c
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File diff suppressed because it is too large Load Diff

7
drivers/target/iscsi/iscsi_target_configfs.c
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@@ -27,6 +27,7 @@
#include <target/target_core_fabric_configfs.h>
#include <target/target_core_configfs.h>
#include <target/configfs_macros.h>
#include <target/iscsi/iscsi_transport.h>
#include "iscsi_target_core.h"
#include "iscsi_target_parameters.h"
@@ -1536,7 +1537,8 @@ static int lio_queue_data_in(struct se_cmd *se_cmd)
struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
cmd->i_state = ISTATE_SEND_DATAIN;
iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
cmd->conn->conn_transport->iscsit_queue_data_in(cmd->conn, cmd);
return 0;
}
@@ -1568,7 +1570,8 @@ static int lio_queue_status(struct se_cmd *se_cmd)
struct iscsi_cmd *cmd = container_of(se_cmd, struct iscsi_cmd, se_cmd);
cmd->i_state = ISTATE_SEND_STATUS;
iscsit_add_cmd_to_response_queue(cmd, cmd->conn, cmd->i_state);
cmd->conn->conn_transport->iscsit_queue_status(cmd->conn, cmd);
return 0;
}

7
drivers/target/iscsi/iscsi_target_device.c
View File

@@ -60,8 +60,13 @@ void iscsit_increment_maxcmdsn(struct iscsi_cmd *cmd, struct iscsi_session *sess
cmd->maxcmdsn_inc = 1;
mutex_lock(&sess->cmdsn_mutex);
if (!mutex_trylock(&sess->cmdsn_mutex)) {
sess->max_cmd_sn += 1;
pr_debug("Updated MaxCmdSN to 0x%08x\n", sess->max_cmd_sn);
return;
}
sess->max_cmd_sn += 1;
pr_debug("Updated MaxCmdSN to 0x%08x\n", sess->max_cmd_sn);
mutex_unlock(&sess->cmdsn_mutex);
}
EXPORT_SYMBOL(iscsit_increment_maxcmdsn);

1
drivers/target/iscsi/iscsi_target_tmr.c
View File

@@ -472,6 +472,7 @@ int iscsit_tmr_post_handler(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
return 0;
}
EXPORT_SYMBOL(iscsit_tmr_post_handler);
/*
* Nothing to do here, but leave it for good measure. :-)