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TaskMgmt : Add an initial function to create a iscsi tm PDU

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This commit is contained in:
Ronnie Sahlberg
2011-02-15 21:53:47 +11:00
parent 332ea04e8d
commit 3dfdebcba7
4 changed files with 118 additions and 1 deletions
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3
Makefile.in
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@@ -5,7 +5,8 @@ bindir = @bindir@
LIBS=-lpopt @LIBS@
CC=gcc
CFLAGS=-g -O2 -fPIC -Wall -W -I. -I./include "-D_U_=__attribute__((unused))"
LIBISCSI_OBJ = lib/connect.o lib/crc32c.o lib/discovery.o lib/init.o lib/login.o lib/md5.o lib/nop.o lib/pdu.o lib/scsi-command.o lib/scsi-lowlevel.o lib/socket.o lib/sync.o
LIBISCSI_OBJ = lib/connect.o lib/crc32c.o lib/discovery.o lib/init.o lib/login.o lib/md5.o lib/nop.o lib/pdu.o lib/scsi-command.o lib/scsi-lowlevel.o lib/socket.o lib/sync.o lib/task_mgmt.o
INSTALLCMD = @install@ -c
LIBISCSI_SO_NAME=libiscsi.so.1

2
include/iscsi-private.h
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@@ -233,6 +233,8 @@ int iscsi_process_scsi_data_in(struct iscsi_context *iscsi,
int iscsi_process_nop_out_reply(struct iscsi_context *iscsi,
struct iscsi_pdu *pdu,
struct iscsi_in_pdu *in);
int iscsi_process_task_mgmt_reply(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
struct iscsi_in_pdu *in);
int iscsi_process_r2t(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
struct iscsi_in_pdu *in);

23
include/iscsi.h
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@@ -413,6 +413,29 @@ struct iscsi_discovery_address {
int iscsi_nop_out_async(struct iscsi_context *iscsi, iscsi_command_cb cb,
unsigned char *data, int len, void *private_data);
/*
* Asynchronous call for task management
*
* Returns:
* 0 if the call was initiated and the task mgmt function will be invoked.
* the connection will be reported through the callback function.
* <0 if there was an error. The callback function will not be invoked.
*
* Callback parameters :
* status can be either of :
* ISCSI_STATUS_GOOD : Connection was successful. Command_data is NULL.
*
* ISCSI_STATUS_ERROR : Error.
*
* The callback will NOT be invoked if the session is explicitely torn down
* through a call to iscsi_disconnect() or iscsi_destroy_context().
*/
int
iscsi_task_mgmt_async(struct iscsi_context *iscsi,
int lun, uint8_t function,
uint32_t ritt, uint32_t rcmdscn,
iscsi_command_cb cb, void *private_data);

91
lib/task_mgmt.c Normal file
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@@ -0,0 +1,91 @@
/*
Copyright (C) 2011 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include "iscsi.h"
#include "iscsi-private.h"
int
iscsi_task_mgmt_async(struct iscsi_context *iscsi,
int lun, uint8_t function,
uint32_t ritt, uint32_t rcmdsn,
iscsi_command_cb cb, void *private_data)
{
struct iscsi_pdu *pdu;
if (iscsi->is_loggedin == 0) {
iscsi_set_error(iscsi, "trying send nop-out while not logged "
"in");
return -1;
}
pdu = iscsi_allocate_pdu(iscsi, ISCSI_PDU_SCSI_TASK_MANAGEMENT_REQUEST,
ISCSI_PDU_SCSI_TASK_MANAGEMENT_RESPONSE);
if (pdu == NULL) {
iscsi_set_error(iscsi, "Failed to allocate task mgmt pdu");
return -1;
}
/* immediate flag */
iscsi_pdu_set_immediate(pdu);
/* flags */
iscsi_pdu_set_pduflags(pdu, 0x80 | function);
/* lun */
iscsi_pdu_set_lun(pdu, 2);
/* ritt */
iscsi_pdu_set_ritt(pdu, ritt);
/* cmdsn is not increased if Immediate delivery*/
iscsi_pdu_set_cmdsn(pdu, iscsi->cmdsn);
pdu->cmdsn = iscsi->cmdsn;
/* rcmdsn */
iscsi_pdu_set_rcmdsn(pdu, rcmdsn);
pdu->callback = cb;
pdu->private_data = private_data;
if (iscsi_queue_pdu(iscsi, pdu) != 0) {
iscsi_set_error(iscsi, "failed to queue iscsi taskmgmt pdu");
iscsi_free_pdu(iscsi, pdu);
return -1;
}
return 0;
}
int
iscsi_process_task_mgmt_reply(struct iscsi_context *iscsi, struct iscsi_pdu *pdu,
struct iscsi_in_pdu *in)
{
struct iscsi_data data;
data.data = NULL;
data.size = 0;
if (in->data_pos > ISCSI_HEADER_SIZE) {
data.data = in->data;
data.size = in->data_pos;
}
pdu->callback(iscsi, SCSI_STATUS_GOOD, &data, pdu->private_data);
return 0;
}