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authorMike Christie <michaelc@cs.wisc.edu>2011-07-25 13:48:50 -0500
committerJames Bottomley <JBottomley@Parallels.com>2011-08-27 08:36:21 -0600
commit90eeb01a038e5fec0efdea4df008f3c18f67b82c (patch)
tree9977dd9000374e1162f56934efcf0e5b8c7c7155 /include/scsi
parent6ac73e8cb02e65abeb2f8d43f0fe48e485444b44 (diff)
downloadop-kernel-dev-90eeb01a038e5fec0efdea4df008f3c18f67b82c.zip
op-kernel-dev-90eeb01a038e5fec0efdea4df008f3c18f67b82c.tar.gz
[SCSI] iscsi class: add bsg support to iscsi class
This patch adds bsg support to the iscsi class. There is only 1 request, the host vendor one, supported. It is expected that this would be used for things like flash updates. This patch is made over this one http://marc.info/?l=linux-scsi&m=131149780020992&w=2 Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'include/scsi')
-rw-r--r--include/scsi/scsi_bsg_iscsi.h110
-rw-r--r--include/scsi/scsi_transport_iscsi.h7
2 files changed, 116 insertions, 1 deletions
diff --git a/include/scsi/scsi_bsg_iscsi.h b/include/scsi/scsi_bsg_iscsi.h
new file mode 100644
index 0000000..fd5689d
--- /dev/null
+++ b/include/scsi/scsi_bsg_iscsi.h
@@ -0,0 +1,110 @@
+/*
+ * iSCSI Transport BSG Interface
+ *
+ * Copyright (C) 2009 James Smart, Emulex Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef SCSI_BSG_ISCSI_H
+#define SCSI_BSG_ISCSI_H
+
+/*
+ * This file intended to be included by both kernel and user space
+ */
+
+#include <scsi/scsi.h>
+
+/*
+ * iSCSI Transport SGIO v4 BSG Message Support
+ */
+
+/* Default BSG request timeout (in seconds) */
+#define ISCSI_DEFAULT_BSG_TIMEOUT (10 * HZ)
+
+
+/*
+ * Request Message Codes supported by the iSCSI Transport
+ */
+
+/* define the class masks for the message codes */
+#define ISCSI_BSG_CLS_MASK 0xF0000000 /* find object class */
+#define ISCSI_BSG_HST_MASK 0x80000000 /* iscsi host class */
+
+/* iscsi host Message Codes */
+#define ISCSI_BSG_HST_VENDOR (ISCSI_BSG_HST_MASK | 0x000000FF)
+
+
+/*
+ * iSCSI Host Messages
+ */
+
+/* ISCSI_BSG_HST_VENDOR : */
+
+/* Request:
+ * Note: When specifying vendor_id, be sure to read the Vendor Type and ID
+ * formatting requirements specified in scsi_netlink.h
+ */
+struct iscsi_bsg_host_vendor {
+ /*
+ * Identifies the vendor that the message is formatted for. This
+ * should be the recipient of the message.
+ */
+ uint64_t vendor_id;
+
+ /* start of vendor command area */
+ uint32_t vendor_cmd[0];
+};
+
+/* Response:
+ */
+struct iscsi_bsg_host_vendor_reply {
+ /* start of vendor response area */
+ uint32_t vendor_rsp[0];
+};
+
+
+/* request (CDB) structure of the sg_io_v4 */
+struct iscsi_bsg_request {
+ uint32_t msgcode;
+ union {
+ struct iscsi_bsg_host_vendor h_vendor;
+ } rqst_data;
+} __attribute__((packed));
+
+
+/* response (request sense data) structure of the sg_io_v4 */
+struct iscsi_bsg_reply {
+ /*
+ * The completion result. Result exists in two forms:
+ * if negative, it is an -Exxx system errno value. There will
+ * be no further reply information supplied.
+ * else, it's the 4-byte scsi error result, with driver, host,
+ * msg and status fields. The per-msgcode reply structure
+ * will contain valid data.
+ */
+ uint32_t result;
+
+ /* If there was reply_payload, how much was recevied ? */
+ uint32_t reply_payload_rcv_len;
+
+ union {
+ struct iscsi_bsg_host_vendor_reply vendor_reply;
+ } reply_data;
+};
+
+
+#endif /* SCSI_BSG_ISCSI_H */
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 77e6dd6..4a3edee 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -38,6 +38,7 @@ struct iscsi_conn;
struct iscsi_task;
struct sockaddr;
struct iscsi_iface;
+struct bsg_job;
/**
* struct iscsi_transport - iSCSI Transport template
@@ -141,9 +142,9 @@ struct iscsi_transport {
enum iscsi_param_type param_type,
int param, char *buf);
mode_t (*attr_is_visible)(int param_type, int param);
+ int (*bsg_request)(struct bsg_job *job);
};
-
/*
* transport registration upcalls
*/
@@ -227,8 +228,12 @@ struct iscsi_cls_session {
struct iscsi_cls_host {
atomic_t nr_scans;
struct mutex mutex;
+ struct request_queue *bsg_q;
};
+#define iscsi_job_to_shost(_job) \
+ dev_to_shost(_job->dev)
+
extern void iscsi_host_for_each_session(struct Scsi_Host *shost,
void (*fn)(struct iscsi_cls_session *));
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