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iscsi: Use struct scsi_lun in iscsi structs instead of u8[8]
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struct scsi_lun is also just a struct with an array of 8 octets (64 bits)
but using it instead in iscsi structs lets us call scsilun_to_int
without a cast, and also lets us copy it using assignment, instead of
memcpy().

Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Andy Grover authored and Nicholas Bellinger committed Jul 25, 2011
1 parent 1235218 commit 55bdabd
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Showing 5 changed files with 23 additions and 24 deletions.
5 changes: 2 additions & 3 deletions drivers/scsi/be2iscsi/be_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3963,11 +3963,10 @@ static int beiscsi_iotask(struct iscsi_task *task, struct scatterlist *sg,
}
memcpy(&io_task->cmd_bhs->iscsi_data_pdu.
dw[offsetof(struct amap_pdu_data_out, lun) / 32],
io_task->cmd_bhs->iscsi_hdr.lun, sizeof(struct scsi_lun));
&io_task->cmd_bhs->iscsi_hdr.lun, sizeof(struct scsi_lun));

AMAP_SET_BITS(struct amap_iscsi_wrb, lun, pwrb,
cpu_to_be16((unsigned short)io_task->cmd_bhs->iscsi_hdr.
lun[0]));
cpu_to_be16(*(unsigned short *)&io_task->cmd_bhs->iscsi_hdr.lun));
AMAP_SET_BITS(struct amap_iscsi_wrb, r2t_exp_dtl, pwrb, xferlen);
AMAP_SET_BITS(struct amap_iscsi_wrb, wrb_idx, pwrb,
io_task->pwrb_handle->wrb_index);
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8 changes: 4 additions & 4 deletions drivers/scsi/bnx2i/bnx2i_hwi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -430,7 +430,7 @@ int bnx2i_send_iscsi_tmf(struct bnx2i_conn *bnx2i_conn,
default:
tmfabort_wqe->ref_itt = RESERVED_ITT;
}
memcpy(scsi_lun, tmfabort_hdr->lun, sizeof(struct scsi_lun));
memcpy(scsi_lun, &tmfabort_hdr->lun, sizeof(struct scsi_lun));
tmfabort_wqe->lun[0] = be32_to_cpu(scsi_lun[0]);
tmfabort_wqe->lun[1] = be32_to_cpu(scsi_lun[1]);

Expand Down Expand Up @@ -547,7 +547,7 @@ int bnx2i_send_iscsi_nopout(struct bnx2i_conn *bnx2i_conn,

nopout_wqe->op_code = nopout_hdr->opcode;
nopout_wqe->op_attr = ISCSI_FLAG_CMD_FINAL;
memcpy(nopout_wqe->lun, nopout_hdr->lun, 8);
memcpy(nopout_wqe->lun, &nopout_hdr->lun, 8);

if (test_bit(BNX2I_NX2_DEV_57710, &ep->hba->cnic_dev_type)) {
u32 tmp = nopout_wqe->lun[0];
Expand Down Expand Up @@ -1711,7 +1711,7 @@ static int bnx2i_process_nopin_mesg(struct iscsi_session *session,
hdr->flags = ISCSI_FLAG_CMD_FINAL;
hdr->itt = task->hdr->itt;
hdr->ttt = cpu_to_be32(nop_in->ttt);
memcpy(hdr->lun, nop_in->lun, 8);
memcpy(&hdr->lun, nop_in->lun, 8);
}
done:
__iscsi_complete_pdu(conn, (struct iscsi_hdr *)hdr, NULL, 0);
Expand Down Expand Up @@ -1754,7 +1754,7 @@ static void bnx2i_process_async_mesg(struct iscsi_session *session,
resp_hdr->opcode = async_cqe->op_code;
resp_hdr->flags = 0x80;

memcpy(resp_hdr->lun, async_cqe->lun, 8);
memcpy(&resp_hdr->lun, async_cqe->lun, 8);
resp_hdr->exp_cmdsn = cpu_to_be32(async_cqe->exp_cmd_sn);
resp_hdr->max_cmdsn = cpu_to_be32(async_cqe->max_cmd_sn);

Expand Down
14 changes: 7 additions & 7 deletions drivers/scsi/libiscsi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -169,7 +169,7 @@ void iscsi_prep_data_out_pdu(struct iscsi_task *task, struct iscsi_r2t_info *r2t
hdr->datasn = cpu_to_be32(r2t->datasn);
r2t->datasn++;
hdr->opcode = ISCSI_OP_SCSI_DATA_OUT;
memcpy(hdr->lun, task->lun, sizeof(hdr->lun));
hdr->lun = task->lun;
hdr->itt = task->hdr_itt;
hdr->exp_statsn = r2t->exp_statsn;
hdr->offset = cpu_to_be32(r2t->data_offset + r2t->sent);
Expand Down Expand Up @@ -296,7 +296,7 @@ static int iscsi_check_tmf_restrictions(struct iscsi_task *task, int opcode)
/*
* Allow PDUs for unrelated LUNs
*/
hdr_lun = scsilun_to_int((struct scsi_lun *)tmf->lun);
hdr_lun = scsilun_to_int(&tmf->lun);
if (hdr_lun != task->sc->device->lun)
return 0;
/* fall through */
Expand Down Expand Up @@ -389,8 +389,8 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
return rc;
hdr->opcode = ISCSI_OP_SCSI_CMD;
hdr->flags = ISCSI_ATTR_SIMPLE;
int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
memcpy(task->lun, hdr->lun, sizeof(task->lun));
int_to_scsilun(sc->device->lun, &hdr->lun);
task->lun = hdr->lun;
hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
cmd_len = sc->cmd_len;
if (cmd_len < ISCSI_CDB_SIZE)
Expand Down Expand Up @@ -968,7 +968,7 @@ static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr)
hdr.flags = ISCSI_FLAG_CMD_FINAL;

if (rhdr) {
memcpy(hdr.lun, rhdr->lun, 8);
hdr.lun = rhdr->lun;
hdr.ttt = rhdr->ttt;
hdr.itt = RESERVED_ITT;
} else
Expand Down Expand Up @@ -2092,7 +2092,7 @@ static void iscsi_prep_abort_task_pdu(struct iscsi_task *task,
hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
hdr->flags = ISCSI_TM_FUNC_ABORT_TASK & ISCSI_FLAG_TM_FUNC_MASK;
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
memcpy(hdr->lun, task->lun, sizeof(hdr->lun));
hdr->lun = task->lun;
hdr->rtt = task->hdr_itt;
hdr->refcmdsn = task->cmdsn;
}
Expand Down Expand Up @@ -2233,7 +2233,7 @@ static void iscsi_prep_lun_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
hdr->flags = ISCSI_TM_FUNC_LOGICAL_UNIT_RESET & ISCSI_FLAG_TM_FUNC_MASK;
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
int_to_scsilun(sc->device->lun, &hdr->lun);
hdr->rtt = RESERVED_ITT;
}

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18 changes: 9 additions & 9 deletions include/scsi/iscsi_proto.h
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,7 @@ struct iscsi_hdr {
uint8_t rsvd2[2];
uint8_t hlength; /* AHSs total length */
uint8_t dlength[3]; /* Data length */
uint8_t lun[8];
struct scsi_lun lun;
itt_t itt; /* Initiator Task Tag, opaque for target */
__be32 ttt; /* Target Task Tag */
__be32 statsn;
Expand Down Expand Up @@ -122,7 +122,7 @@ struct iscsi_scsi_req {
__be16 rsvd2;
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
struct scsi_lun lun;
itt_t itt; /* Initiator Task Tag */
__be32 data_length;
__be32 cmdsn;
Expand Down Expand Up @@ -198,7 +198,7 @@ struct iscsi_async {
uint8_t rsvd2[2];
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
struct scsi_lun lun;
uint8_t rsvd4[8];
__be32 statsn;
__be32 exp_cmdsn;
Expand Down Expand Up @@ -226,7 +226,7 @@ struct iscsi_nopout {
__be16 rsvd2;
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
struct scsi_lun lun;
itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 cmdsn;
Expand All @@ -241,7 +241,7 @@ struct iscsi_nopin {
__be16 rsvd2;
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
struct scsi_lun lun;
itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 statsn;
Expand All @@ -257,7 +257,7 @@ struct iscsi_tm {
uint8_t rsvd1[2];
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
struct scsi_lun lun;
itt_t itt; /* Initiator Task Tag */
itt_t rtt; /* Reference Task Tag */
__be32 cmdsn;
Expand Down Expand Up @@ -315,7 +315,7 @@ struct iscsi_r2t_rsp {
uint8_t rsvd2[2];
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
struct scsi_lun lun;
itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 statsn;
Expand All @@ -333,7 +333,7 @@ struct iscsi_data {
uint8_t rsvd2[2];
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
struct scsi_lun lun;
itt_t itt;
__be32 ttt;
__be32 rsvd4;
Expand All @@ -353,7 +353,7 @@ struct iscsi_data_rsp {
uint8_t cmd_status;
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
struct scsi_lun lun;
itt_t itt;
__be32 ttt;
__be32 statsn;
Expand Down
2 changes: 1 addition & 1 deletion include/scsi/libiscsi.h
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Original file line number Diff line number Diff line change
Expand Up @@ -115,7 +115,7 @@ struct iscsi_task {
/* copied values in case we need to send tmfs */
itt_t hdr_itt;
__be32 cmdsn;
uint8_t lun[8];
struct scsi_lun lun;

int itt; /* this ITT */

Expand Down

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