[RFC-v2 01/12] iscsi: Resolve iscsi_proto.h naming conflicts with drivers/target/iscsi

Nicholas A. Bellinger
2011-03-14T12:03:13Z

From: Nicholas Bellinger <nab@linux-iscsi.org>

This patch renames the following iscsi_proto.h structures to avoid
namespace issues with drivers/target/iscsi/iscsi_target_core.h:

*) struct iscsi_cmd -> struct iscsi_scsi_cmd
*) struct iscsi_cmd_rsp -> struct iscsi_scsi_rsp
*) struct iscsi_login -> struct iscsi_login_req

This patch includes useful ISCSI_FLAG_LOGIN_[CURRENT,NEXT]_STAGE*,
and ISCSI_FLAG_SNACK_TYPE_* definitions used by iscsi_target_mod, and
fixes the incorrect definition of struct iscsi_snack to following
RFC-3720 Section 10.16. SNACK Request.

Also, this patch updates libiscsi, iSER, be2iscsi, and bn2xi to
use the updated structure definitions in a handful of locations.

Signed-off-by: Nicholas A. Bellinger <nab@linux-iscsi.org>
---
drivers/infiniband/ulp/iser/iser_initiator.c | 2 +-
drivers/scsi/be2iscsi/be_main.h | 4 +-
drivers/scsi/bnx2i/bnx2i_hwi.c | 8 +++---
drivers/scsi/bnx2i/bnx2i_iscsi.c | 2 +-
drivers/scsi/libiscsi.c | 6 ++--
include/scsi/iscsi_proto.h | 30 +++++++++++++++++++-------
6 files changed, 33 insertions(+), 19 deletions(-)

diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c
index 95a08a8..dd28367 100644
--- a/drivers/infiniband/ulp/iser/iser_initiator.c
+++ b/drivers/infiniband/ulp/iser/iser_initiator.c
@@ -271,7 +271,7 @@ int iser_send_command(struct iscsi_conn *conn,
unsigned long edtl;
int err;
struct iser_data_buf *data_buf;
- struct iscsi_cmd *hdr = (struct iscsi_cmd *)task->hdr;
+ struct iscsi_scsi_cmd *hdr = (struct iscsi_scsi_cmd *)task->hdr;
struct scsi_cmnd *sc = task->sc;
struct iser_tx_desc *tx_desc = &iser_task->desc;

diff --git a/drivers/scsi/be2iscsi/be_main.h b/drivers/scsi/be2iscsi/be_main.h
index 90eb74f..f05ada1 100644
--- a/drivers/scsi/be2iscsi/be_main.h
+++ b/drivers/scsi/be2iscsi/be_main.h
@@ -398,7 +398,7 @@ struct amap_pdu_data_out {
};

struct be_cmd_bhs {
- struct iscsi_cmd iscsi_hdr;
+ struct iscsi_scsi_cmd iscsi_hdr;
unsigned char pad1[16];
struct pdu_data_out iscsi_data_pdu;
unsigned char pad2[BE_SENSE_INFO_SIZE -
@@ -429,7 +429,7 @@ struct be_nonio_bhs {
};

struct be_status_bhs {
- struct iscsi_cmd iscsi_hdr;
+ struct iscsi_scsi_cmd iscsi_hdr;
unsigned char pad1[16];
/**
* The plus 2 below is to hold the sense info length that gets
diff --git a/drivers/scsi/bnx2i/bnx2i_hwi.c b/drivers/scsi/bnx2i/bnx2i_hwi.c
index 96505e3..f947c80 100644
--- a/drivers/scsi/bnx2i/bnx2i_hwi.c
+++ b/drivers/scsi/bnx2i/bnx2i_hwi.c
@@ -326,11 +326,11 @@ int bnx2i_send_iscsi_login(struct bnx2i_conn *bnx2i_conn,
{
struct bnx2i_cmd *bnx2i_cmd;
struct bnx2i_login_request *login_wqe;
- struct iscsi_login *login_hdr;
+ struct iscsi_login_req *login_hdr;
u32 dword;

bnx2i_cmd = (struct bnx2i_cmd *)task->dd_data;
- login_hdr = (struct iscsi_login *)task->hdr;
+ login_hdr = (struct iscsi_login_req *)task->hdr;
login_wqe = (struct bnx2i_login_request *)
bnx2i_conn->ep->qp.sq_prod_qe;

@@ -1288,7 +1288,7 @@ static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
struct bnx2i_cmd_response *resp_cqe;
struct bnx2i_cmd *bnx2i_cmd;
struct iscsi_task *task;
- struct iscsi_cmd_rsp *hdr;
+ struct iscsi_scsi_rsp *hdr;
u32 datalen = 0;

resp_cqe = (struct bnx2i_cmd_response *)cqe;
@@ -1315,7 +1315,7 @@ static int bnx2i_process_scsi_cmd_resp(struct iscsi_session *session,
}
bnx2i_iscsi_unmap_sg_list(bnx2i_cmd);

- hdr = (struct iscsi_cmd_rsp *)task->hdr;
+ hdr = (struct iscsi_scsi_rsp *)task->hdr;
resp_cqe = (struct bnx2i_cmd_response *)cqe;
hdr->opcode = resp_cqe->op_code;
hdr->max_cmdsn = cpu_to_be32(resp_cqe->max_cmd_sn);
diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c
index f0dce26..8f047ba 100644
--- a/drivers/scsi/bnx2i/bnx2i_iscsi.c
+++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
@@ -1203,7 +1203,7 @@ static int bnx2i_task_xmit(struct iscsi_task *task)
struct bnx2i_conn *bnx2i_conn = conn->dd_data;
struct scsi_cmnd *sc = task->sc;
struct bnx2i_cmd *cmd = task->dd_data;
- struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
+ struct iscsi_scsi_cmd *hdr = (struct iscsi_scsi_cmd *) task->hdr;

/*
* If there is no scsi_cmnd this must be a mgmt task
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index da8b615..61d6420 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -360,7 +360,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
struct iscsi_conn *conn = task->conn;
struct iscsi_session *session = conn->session;
struct scsi_cmnd *sc = task->sc;
- struct iscsi_cmd *hdr;
+ struct iscsi_scsi_cmd *hdr;
unsigned hdrlength, cmd_len;
itt_t itt;
int rc;
@@ -374,7 +374,7 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
if (rc)
return rc;
}
- hdr = (struct iscsi_cmd *) task->hdr;
+ hdr = (struct iscsi_scsi_cmd *) task->hdr;
itt = hdr->itt;
memset(hdr, 0, sizeof(*hdr));

@@ -830,7 +830,7 @@ static void iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
struct iscsi_task *task, char *data,
int datalen)
{
- struct iscsi_cmd_rsp *rhdr = (struct iscsi_cmd_rsp *)hdr;
+ struct iscsi_scsi_rsp *rhdr = (struct iscsi_scsi_rsp *)hdr;
struct iscsi_session *session = conn->session;
struct scsi_cmnd *sc = task->sc;

diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h
index dd0a52c..c3e6d4f 100644
--- a/include/scsi/iscsi_proto.h
+++ b/include/scsi/iscsi_proto.h
@@ -116,7 +116,7 @@ struct iscsi_ahs_hdr {
#define ISCSI_CDB_SIZE 16

/* iSCSI PDU Header */
-struct iscsi_cmd {
+struct iscsi_scsi_cmd {
uint8_t opcode;
uint8_t flags;
__be16 rsvd2;
@@ -161,7 +161,7 @@ struct iscsi_ecdb_ahdr {
};

/* SCSI Response Header */
-struct iscsi_cmd_rsp {
+struct iscsi_scsi_rsp {
uint8_t opcode;
uint8_t flags;
uint8_t response;
@@ -406,7 +406,7 @@ struct iscsi_text_rsp {
};

/* Login Header */
-struct iscsi_login {
+struct iscsi_login_req {
uint8_t opcode;
uint8_t flags;
uint8_t max_version; /* Max. version supported */
@@ -427,7 +427,13 @@ struct iscsi_login {
#define ISCSI_FLAG_LOGIN_TRANSIT 0x80
#define ISCSI_FLAG_LOGIN_CONTINUE 0x40
#define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK 0x0C /* 2 bits */
+#define ISCSI_FLAG_LOGIN_CURRENT_STAGE1 0x04
+#define ISCSI_FLAG_LOGIN_CURRENT_STAGE2 0x08
+#define ISCSI_FLAG_LOGIN_CURRENT_STAGE3 0x0C
#define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK 0x03 /* 2 bits */
+#define ISCSI_FLAG_LOGIN_NEXT_STAGE1 0x01
+#define ISCSI_FLAG_LOGIN_NEXT_STAGE2 0x02
+#define ISCSI_FLAG_LOGIN_NEXT_STAGE3 0x03

#define ISCSI_LOGIN_CURRENT_STAGE(flags) \
((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2)
@@ -550,17 +556,25 @@ struct iscsi_logout_rsp {
struct iscsi_snack {
uint8_t opcode;
uint8_t flags;
- uint8_t rsvd2[14];
+ uint8_t rsvd2[2];
+ uint8_t hlength;
+ uint8_t dlength[3];
+ uint8_t lun[8];
itt_t itt;
+ __be32 ttt;
+ uint8_t rsvd3[4];
+ __be32 exp_statsn;
+ uint8_t rsvd4[8];
__be32 begrun;
__be32 runlength;
- __be32 exp_statsn;
- __be32 rsvd3;
- __be32 exp_datasn;
- uint8_t rsvd6[8];
};

/* SNACK PDU flags */
+#define ISCSI_FLAG_SNACK_TYPE_DATA 0
+#define ISCSI_FLAG_SNACK_TYPE_R2T 0
+#define ISCSI_FLAG_SNACK_TYPE_STATUS 1
+#define ISCSI_FLAG_SNACK_TYPE_DATA_ACK 2
+#define ISCSI_FLAG_SNACK_TYPE_RDATA 3
#define ISCSI_FLAG_SNACK_TYPE_MASK 0x0F /* 4 bits */

/* Reject Message Header */
--
1.7.4.1