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[PATCH] iscsi endianness annotations
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Signed-off-by: Al Viro <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
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Al Viro authored and Linus Torvalds committed Feb 9, 2007
1 parent 04d4f7a commit b437735
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Showing 4 changed files with 49 additions and 43 deletions.
4 changes: 2 additions & 2 deletions drivers/infiniband/ulp/iser/iser_initiator.c
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Original file line number Diff line number Diff line change
Expand Up @@ -567,7 +567,7 @@ void iser_rcv_completion(struct iser_desc *rx_desc,
opcode = hdr->opcode & ISCSI_OPCODE_MASK;

if (opcode == ISCSI_OP_SCSI_CMD_RSP) {
itt = hdr->itt & ISCSI_ITT_MASK; /* mask out cid and age bits */
itt = get_itt(hdr->itt); /* mask out cid and age bits */
if (!(itt < session->cmds_max))
iser_err("itt can't be matched to task!!!"
"conn %p opcode %d cmds_max %d itt %d\n",
Expand Down Expand Up @@ -625,7 +625,7 @@ void iser_snd_completion(struct iser_desc *tx_desc)
/* this arithmetic is legal by libiscsi dd_data allocation */
mtask = (void *) ((long)(void *)tx_desc -
sizeof(struct iscsi_mgmt_task));
if (mtask->hdr->itt == cpu_to_be32(ISCSI_RESERVED_TAG)) {
if (mtask->hdr->itt == RESERVED_ITT) {
struct iscsi_session *session = conn->session;

spin_lock(&conn->session->lock);
Expand Down
2 changes: 1 addition & 1 deletion drivers/scsi/iscsi_tcp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1375,7 +1375,7 @@ iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
}

BUG_ON(tcp_mtask->xmstate != XMSTATE_IDLE);
if (mtask->hdr->itt == cpu_to_be32(ISCSI_RESERVED_TAG)) {
if (mtask->hdr->itt == RESERVED_ITT) {
struct iscsi_session *session = conn->session;

spin_lock_bh(&session->lock);
Expand Down
40 changes: 19 additions & 21 deletions drivers/scsi/libiscsi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -113,8 +113,7 @@ static void iscsi_prep_scsi_cmd_pdu(struct iscsi_cmd_task *ctask)
hdr->opcode = ISCSI_OP_SCSI_CMD;
hdr->flags = ISCSI_ATTR_SIMPLE;
int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
hdr->itt = ctask->itt | (conn->id << ISCSI_CID_SHIFT) |
(session->age << ISCSI_AGE_SHIFT);
hdr->itt = build_itt(ctask->itt, conn->id, session->age);
hdr->data_length = cpu_to_be32(sc->request_bufflen);
hdr->cmdsn = cpu_to_be32(session->cmdsn);
session->cmdsn++;
Expand Down Expand Up @@ -270,7 +269,7 @@ static int iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
goto out;
}

senselen = be16_to_cpu(*(uint16_t *)data);
senselen = be16_to_cpu(*(__be16 *)data);
if (datalen < senselen)
goto invalid_datalen;

Expand Down Expand Up @@ -338,7 +337,7 @@ static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,

if (ntoh24(reject->dlength) >= sizeof(struct iscsi_hdr)) {
memcpy(&rejected_pdu, data, sizeof(struct iscsi_hdr));
itt = rejected_pdu.itt & ISCSI_ITT_MASK;
itt = get_itt(rejected_pdu.itt);
printk(KERN_ERR "itt 0x%x had pdu (op 0x%x) rejected "
"due to DataDigest error.\n", itt,
rejected_pdu.opcode);
Expand Down Expand Up @@ -367,10 +366,10 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
struct iscsi_mgmt_task *mtask;
uint32_t itt;

if (hdr->itt != cpu_to_be32(ISCSI_RESERVED_TAG))
itt = hdr->itt & ISCSI_ITT_MASK;
if (hdr->itt != RESERVED_ITT)
itt = get_itt(hdr->itt);
else
itt = hdr->itt;
itt = ~0U;

if (itt < session->cmds_max) {
ctask = session->cmds[itt];
Expand Down Expand Up @@ -440,7 +439,7 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
iscsi_tmf_rsp(conn, hdr);
break;
case ISCSI_OP_NOOP_IN:
if (hdr->ttt != ISCSI_RESERVED_TAG || datalen) {
if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || datalen) {
rc = ISCSI_ERR_PROTO;
break;
}
Expand All @@ -457,7 +456,7 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
rc = ISCSI_ERR_BAD_OPCODE;
break;
}
} else if (itt == ISCSI_RESERVED_TAG) {
} else if (itt == ~0U) {
rc = iscsi_check_assign_cmdsn(session,
(struct iscsi_nopin*)hdr);
if (rc)
Expand All @@ -470,7 +469,7 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
break;
}

if (hdr->ttt == ISCSI_RESERVED_TAG)
if (hdr->ttt == cpu_to_be32(ISCSI_RESERVED_TAG))
break;

if (iscsi_recv_pdu(conn->cls_conn, hdr, NULL, 0))
Expand Down Expand Up @@ -516,24 +515,24 @@ int iscsi_verify_itt(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
struct iscsi_cmd_task *ctask;
uint32_t itt;

if (hdr->itt != cpu_to_be32(ISCSI_RESERVED_TAG)) {
if ((hdr->itt & ISCSI_AGE_MASK) !=
if (hdr->itt != RESERVED_ITT) {
if (((__force u32)hdr->itt & ISCSI_AGE_MASK) !=
(session->age << ISCSI_AGE_SHIFT)) {
printk(KERN_ERR "iscsi: received itt %x expected "
"session age (%x)\n", hdr->itt,
"session age (%x)\n", (__force u32)hdr->itt,
session->age & ISCSI_AGE_MASK);
return ISCSI_ERR_BAD_ITT;
}

if ((hdr->itt & ISCSI_CID_MASK) !=
if (((__force u32)hdr->itt & ISCSI_CID_MASK) !=
(conn->id << ISCSI_CID_SHIFT)) {
printk(KERN_ERR "iscsi: received itt %x, expected "
"CID (%x)\n", hdr->itt, conn->id);
"CID (%x)\n", (__force u32)hdr->itt, conn->id);
return ISCSI_ERR_BAD_ITT;
}
itt = hdr->itt & ISCSI_ITT_MASK;
itt = get_itt(hdr->itt);
} else
itt = hdr->itt;
itt = ~0U;

if (itt < session->cmds_max) {
ctask = session->cmds[itt];
Expand Down Expand Up @@ -896,9 +895,8 @@ iscsi_conn_send_generic(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
/*
* pre-format CmdSN for outgoing PDU.
*/
if (hdr->itt != cpu_to_be32(ISCSI_RESERVED_TAG)) {
hdr->itt = mtask->itt | (conn->id << ISCSI_CID_SHIFT) |
(session->age << ISCSI_AGE_SHIFT);
if (hdr->itt != RESERVED_ITT) {
hdr->itt = build_itt(mtask->itt, conn->id, session->age);
nop->cmdsn = cpu_to_be32(session->cmdsn);
if (conn->c_stage == ISCSI_CONN_STARTED &&
!(hdr->opcode & ISCSI_OP_IMMEDIATE))
Expand Down Expand Up @@ -1064,7 +1062,7 @@ static int iscsi_exec_abort_task(struct scsi_cmnd *sc,

spin_lock_bh(&session->lock);
ctask->mtask = (struct iscsi_mgmt_task *)
session->mgmt_cmds[(hdr->itt & ISCSI_ITT_MASK) -
session->mgmt_cmds[get_itt(hdr->itt) -
ISCSI_MGMT_ITT_OFFSET];

if (conn->tmabort_state == TMABORT_INITIAL) {
Expand Down
46 changes: 27 additions & 19 deletions include/scsi/iscsi_proto.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,14 @@
}
#define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;}

/* initiator tags; opaque for target */
typedef uint32_t __bitwise__ itt_t;
/* below makes sense only for initiator that created this tag */
#define build_itt(itt, id, age) ((__force itt_t)\
((itt) | ((id) << ISCSI_CID_SHIFT) | ((age) << ISCSI_AGE_SHIFT)))
#define get_itt(itt) ((__force uint32_t)(itt_t)(itt) & ISCSI_ITT_MASK)
#define RESERVED_ITT ((__force itt_t)0xffffffff)

/*
* iSCSI Template Message Header
*/
Expand All @@ -50,7 +58,7 @@ struct iscsi_hdr {
uint8_t hlength; /* AHSs total length */
uint8_t dlength[3]; /* Data length */
uint8_t lun[8];
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag, opaque for target */
__be32 ttt; /* Target Task Tag */
__be32 statsn;
__be32 exp_statsn;
Expand Down Expand Up @@ -111,7 +119,7 @@ struct iscsi_cmd {
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag */
__be32 data_length;
__be32 cmdsn;
__be32 exp_statsn;
Expand Down Expand Up @@ -148,7 +156,7 @@ struct iscsi_cmd_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd[8];
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag */
__be32 rsvd1;
__be32 statsn;
__be32 exp_cmdsn;
Expand Down Expand Up @@ -206,7 +214,7 @@ struct iscsi_nopout {
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 cmdsn;
__be32 exp_statsn;
Expand All @@ -221,7 +229,7 @@ struct iscsi_nopin {
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 statsn;
__be32 exp_cmdsn;
Expand All @@ -237,8 +245,8 @@ struct iscsi_tm {
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
__be32 itt; /* Initiator Task Tag */
__be32 rtt; /* Reference Task Tag */
itt_t itt; /* Initiator Task Tag */
itt_t rtt; /* Reference Task Tag */
__be32 cmdsn;
__be32 exp_statsn;
__be32 refcmdsn;
Expand Down Expand Up @@ -267,8 +275,8 @@ struct iscsi_tm_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd2[8];
__be32 itt; /* Initiator Task Tag */
__be32 rtt; /* Reference Task Tag */
itt_t itt; /* Initiator Task Tag */
itt_t rtt; /* Reference Task Tag */
__be32 statsn;
__be32 exp_cmdsn;
__be32 max_cmdsn;
Expand All @@ -293,7 +301,7 @@ struct iscsi_r2t_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag */
__be32 ttt; /* Target Transfer Tag */
__be32 statsn;
__be32 exp_cmdsn;
Expand All @@ -311,7 +319,7 @@ struct iscsi_data {
uint8_t rsvd3;
uint8_t dlength[3];
uint8_t lun[8];
__be32 itt;
itt_t itt;
__be32 ttt;
__be32 rsvd4;
__be32 exp_statsn;
Expand All @@ -331,7 +339,7 @@ struct iscsi_data_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t lun[8];
__be32 itt;
itt_t itt;
__be32 ttt;
__be32 statsn;
__be32 exp_cmdsn;
Expand All @@ -355,7 +363,7 @@ struct iscsi_text {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd4[8];
__be32 itt;
itt_t itt;
__be32 ttt;
__be32 cmdsn;
__be32 exp_statsn;
Expand All @@ -373,7 +381,7 @@ struct iscsi_text_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd4[8];
__be32 itt;
itt_t itt;
__be32 ttt;
__be32 statsn;
__be32 exp_cmdsn;
Expand All @@ -392,7 +400,7 @@ struct iscsi_login {
uint8_t dlength[3];
uint8_t isid[6]; /* Initiator Session ID */
__be16 tsih; /* Target Session Handle */
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag */
__be16 cid;
__be16 rsvd3;
__be32 cmdsn;
Expand Down Expand Up @@ -421,7 +429,7 @@ struct iscsi_login_rsp {
uint8_t dlength[3];
uint8_t isid[6]; /* Initiator Session ID */
__be16 tsih; /* Target Session Handle */
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag */
__be32 rsvd3;
__be32 statsn;
__be32 exp_cmdsn;
Expand Down Expand Up @@ -478,7 +486,7 @@ struct iscsi_logout {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd2[8];
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag */
__be16 cid;
uint8_t rsvd3[2];
__be32 cmdsn;
Expand All @@ -505,7 +513,7 @@ struct iscsi_logout_rsp {
uint8_t hlength;
uint8_t dlength[3];
uint8_t rsvd3[8];
__be32 itt; /* Initiator Task Tag */
itt_t itt; /* Initiator Task Tag */
__be32 rsvd4;
__be32 statsn;
__be32 exp_cmdsn;
Expand All @@ -528,7 +536,7 @@ struct iscsi_snack {
uint8_t opcode;
uint8_t flags;
uint8_t rsvd2[14];
__be32 itt;
itt_t itt;
__be32 begrun;
__be32 runlength;
__be32 exp_statsn;
Expand Down

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