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[SCSI] libiscsi, iscsi_tcp: add device support

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This patch adds logical unit reset support. This should work for ib_iser,
but I have not finished testing that driver so it is not hooked in yet.

This patch also temporarily reverts the iscsi_tcp r2t write out patch.
That code is completely rewritten in this patchset.

Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Mike Christie 2007-12-13 12:43:20 -06:00 committed by James Bottomley
parent 8ae732a91d
commit 843c0a8a76
8 changed files with 396 additions and 322 deletions
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6
drivers/infiniband/ulp/iser/iscsi_iser.c
View file

@ -220,12 +220,6 @@ iscsi_iser_ctask_xmit(struct iscsi_conn *conn,
debug_scsi("ctask deq [cid %d itt 0x%x]\n",
conn->id, ctask->itt);
/*
* serialize with TMF AbortTask
*/
if (ctask->mtask)
return error;
/* Send the cmd PDU */
if (!iser_ctask->command_sent) {
error = iser_send_command(conn, ctask);

151
drivers/scsi/iscsi_tcp.c
View file

@ -197,7 +197,7 @@ iscsi_tcp_cleanup_ctask(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
if (unlikely(!sc))
return;
tcp_ctask->xmstate = XMSTATE_VALUE_IDLE;
tcp_ctask->xmstate = XMSTATE_IDLE;
tcp_ctask->r2t = NULL;
}
@ -369,8 +369,7 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
spin_lock(&session->lock);
iscsi_update_cmdsn(session, (struct iscsi_nopin*)rhdr);
if (!ctask->sc || ctask->mtask ||
session->state != ISCSI_STATE_LOGGED_IN) {
if (!ctask->sc || session->state != ISCSI_STATE_LOGGED_IN) {
printk(KERN_INFO "iscsi_tcp: dropping R2T itt %d in "
"recovery...\n", ctask->itt);
spin_unlock(&session->lock);
@ -409,11 +408,10 @@ iscsi_r2t_rsp(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
tcp_ctask->exp_datasn = r2tsn + 1;
__kfifo_put(tcp_ctask->r2tqueue, (void*)&r2t, sizeof(void*));
set_bit(XMSTATE_BIT_SOL_HDR_INIT, &tcp_ctask->xmstate);
list_move_tail(&ctask->running, &conn->xmitqueue);
scsi_queue_work(session->host, &conn->xmitwork);
tcp_ctask->xmstate |= XMSTATE_SOL_HDR_INIT;
conn->r2t_pdus_cnt++;
iscsi_requeue_ctask(ctask);
spin_unlock(&session->lock);
return 0;
@ -1254,7 +1252,7 @@ static void iscsi_set_padding(struct iscsi_tcp_cmd_task *tcp_ctask,
tcp_ctask->pad_count = ISCSI_PAD_LEN - tcp_ctask->pad_count;
debug_scsi("write padding %d bytes\n", tcp_ctask->pad_count);
set_bit(XMSTATE_BIT_W_PAD, &tcp_ctask->xmstate);
tcp_ctask->xmstate |= XMSTATE_W_PAD;
}
/**
@ -1269,7 +1267,7 @@ iscsi_tcp_cmd_init(struct iscsi_cmd_task *ctask)
struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
BUG_ON(__kfifo_len(tcp_ctask->r2tqueue));
tcp_ctask->xmstate = 1 << XMSTATE_BIT_CMD_HDR_INIT;
tcp_ctask->xmstate = XMSTATE_CMD_HDR_INIT;
}
/**
@ -1283,10 +1281,10 @@ iscsi_tcp_cmd_init(struct iscsi_cmd_task *ctask)
* xmit.
*
* Management xmit state machine consists of these states:
* XMSTATE_BIT_IMM_HDR_INIT - calculate digest of PDU Header
* XMSTATE_BIT_IMM_HDR - PDU Header xmit in progress
* XMSTATE_BIT_IMM_DATA - PDU Data xmit in progress
* XMSTATE_VALUE_IDLE - management PDU is done
* XMSTATE_IMM_HDR_INIT - calculate digest of PDU Header
* XMSTATE_IMM_HDR - PDU Header xmit in progress
* XMSTATE_IMM_DATA - PDU Data xmit in progress
* XMSTATE_IDLE - management PDU is done
**/
static int
iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
@ -1297,12 +1295,12 @@ iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
debug_scsi("mtask deq [cid %d state %x itt 0x%x]\n",
conn->id, tcp_mtask->xmstate, mtask->itt);
if (test_bit(XMSTATE_BIT_IMM_HDR_INIT, &tcp_mtask->xmstate)) {
if (tcp_mtask->xmstate & XMSTATE_IMM_HDR_INIT) {
iscsi_buf_init_iov(&tcp_mtask->headbuf, (char*)mtask->hdr,
sizeof(struct iscsi_hdr));
if (mtask->data_count) {
set_bit(XMSTATE_BIT_IMM_DATA, &tcp_mtask->xmstate);
tcp_mtask->xmstate |= XMSTATE_IMM_DATA;
iscsi_buf_init_iov(&tcp_mtask->sendbuf,
(char*)mtask->data,
mtask->data_count);
@ -1315,20 +1313,21 @@ iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
(u8*)tcp_mtask->hdrext);
tcp_mtask->sent = 0;
clear_bit(XMSTATE_BIT_IMM_HDR_INIT, &tcp_mtask->xmstate);
set_bit(XMSTATE_BIT_IMM_HDR, &tcp_mtask->xmstate);
tcp_mtask->xmstate &= ~XMSTATE_IMM_HDR_INIT;
tcp_mtask->xmstate |= XMSTATE_IMM_HDR;
}
if (test_bit(XMSTATE_BIT_IMM_HDR, &tcp_mtask->xmstate)) {
if (tcp_mtask->xmstate & XMSTATE_IMM_HDR) {
rc = iscsi_sendhdr(conn, &tcp_mtask->headbuf,
mtask->data_count);
if (rc)
return rc;
clear_bit(XMSTATE_BIT_IMM_HDR, &tcp_mtask->xmstate);
tcp_mtask->xmstate &= ~XMSTATE_IMM_HDR;
}
if (test_and_clear_bit(XMSTATE_BIT_IMM_DATA, &tcp_mtask->xmstate)) {
if (tcp_mtask->xmstate & XMSTATE_IMM_DATA) {
BUG_ON(!mtask->data_count);
tcp_mtask->xmstate &= ~XMSTATE_IMM_DATA;
/* FIXME: implement.
* Virtual buffer could be spreaded across multiple pages...
*/
@ -1338,13 +1337,13 @@ iscsi_tcp_mtask_xmit(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
rc = iscsi_sendpage(conn, &tcp_mtask->sendbuf,
&mtask->data_count, &tcp_mtask->sent);
if (rc) {
set_bit(XMSTATE_BIT_IMM_DATA, &tcp_mtask->xmstate);
tcp_mtask->xmstate |= XMSTATE_IMM_DATA;
return rc;
}
} while (mtask->data_count);
}
BUG_ON(tcp_mtask->xmstate != XMSTATE_VALUE_IDLE);
BUG_ON(tcp_mtask->xmstate != XMSTATE_IDLE);
if (mtask->hdr->itt == RESERVED_ITT) {
struct iscsi_session *session = conn->session;
@ -1364,7 +1363,7 @@ iscsi_send_cmd_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
int rc = 0;
if (test_bit(XMSTATE_BIT_CMD_HDR_INIT, &tcp_ctask->xmstate)) {
if (tcp_ctask->xmstate & XMSTATE_CMD_HDR_INIT) {
tcp_ctask->sent = 0;
tcp_ctask->sg_count = 0;
tcp_ctask->exp_datasn = 0;
@ -1389,21 +1388,21 @@ iscsi_send_cmd_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
if (conn->hdrdgst_en)
iscsi_hdr_digest(conn, &tcp_ctask->headbuf,
(u8*)tcp_ctask->hdrext);
clear_bit(XMSTATE_BIT_CMD_HDR_INIT, &tcp_ctask->xmstate);
set_bit(XMSTATE_BIT_CMD_HDR_XMIT, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_CMD_HDR_INIT;
tcp_ctask->xmstate |= XMSTATE_CMD_HDR_XMIT;
}
if (test_bit(XMSTATE_BIT_CMD_HDR_XMIT, &tcp_ctask->xmstate)) {
if (tcp_ctask->xmstate & XMSTATE_CMD_HDR_XMIT) {
rc = iscsi_sendhdr(conn, &tcp_ctask->headbuf, ctask->imm_count);
if (rc)
return rc;
clear_bit(XMSTATE_BIT_CMD_HDR_XMIT, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_CMD_HDR_XMIT;
if (sc->sc_data_direction != DMA_TO_DEVICE)
return 0;
if (ctask->imm_count) {
set_bit(XMSTATE_BIT_IMM_DATA, &tcp_ctask->xmstate);
tcp_ctask->xmstate |= XMSTATE_IMM_DATA;
iscsi_set_padding(tcp_ctask, ctask->imm_count);
if (ctask->conn->datadgst_en) {
@ -1413,10 +1412,9 @@ iscsi_send_cmd_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
}
}
if (ctask->unsol_count) {
set_bit(XMSTATE_BIT_UNS_HDR, &tcp_ctask->xmstate);
set_bit(XMSTATE_BIT_UNS_INIT, &tcp_ctask->xmstate);
}
if (ctask->unsol_count)
tcp_ctask->xmstate |=
XMSTATE_UNS_HDR | XMSTATE_UNS_INIT;
}
return rc;
}
@ -1428,25 +1426,25 @@ iscsi_send_padding(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
struct iscsi_tcp_conn *tcp_conn = conn->dd_data;
int sent = 0, rc;
if (test_bit(XMSTATE_BIT_W_PAD, &tcp_ctask->xmstate)) {
if (tcp_ctask->xmstate & XMSTATE_W_PAD) {
iscsi_buf_init_iov(&tcp_ctask->sendbuf, (char*)&tcp_ctask->pad,
tcp_ctask->pad_count);
if (conn->datadgst_en)
crypto_hash_update(&tcp_conn->tx_hash,
&tcp_ctask->sendbuf.sg,
tcp_ctask->sendbuf.sg.length);
} else if (!test_bit(XMSTATE_BIT_W_RESEND_PAD, &tcp_ctask->xmstate))
} else if (!(tcp_ctask->xmstate & XMSTATE_W_RESEND_PAD))
return 0;
clear_bit(XMSTATE_BIT_W_PAD, &tcp_ctask->xmstate);
clear_bit(XMSTATE_BIT_W_RESEND_PAD, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_W_PAD;
tcp_ctask->xmstate &= ~XMSTATE_W_RESEND_PAD;
debug_scsi("sending %d pad bytes for itt 0x%x\n",
tcp_ctask->pad_count, ctask->itt);
rc = iscsi_sendpage(conn, &tcp_ctask->sendbuf, &tcp_ctask->pad_count,
&sent);
if (rc) {
debug_scsi("padding send failed %d\n", rc);
set_bit(XMSTATE_BIT_W_RESEND_PAD, &tcp_ctask->xmstate);
tcp_ctask->xmstate |= XMSTATE_W_RESEND_PAD;
}
return rc;
}
@ -1465,11 +1463,11 @@ iscsi_send_digest(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
tcp_ctask = ctask->dd_data;
tcp_conn = conn->dd_data;
if (!test_bit(XMSTATE_BIT_W_RESEND_DATA_DIGEST, &tcp_ctask->xmstate)) {
if (!(tcp_ctask->xmstate & XMSTATE_W_RESEND_DATA_DIGEST)) {
crypto_hash_final(&tcp_conn->tx_hash, (u8*)digest);
iscsi_buf_init_iov(buf, (char*)digest, 4);
}
clear_bit(XMSTATE_BIT_W_RESEND_DATA_DIGEST, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_W_RESEND_DATA_DIGEST;
rc = iscsi_sendpage(conn, buf, &tcp_ctask->digest_count, &sent);
if (!rc)
@ -1478,7 +1476,7 @@ iscsi_send_digest(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
else {
debug_scsi("sending digest 0x%x failed for itt 0x%x!\n",
*digest, ctask->itt);
set_bit(XMSTATE_BIT_W_RESEND_DATA_DIGEST, &tcp_ctask->xmstate);
tcp_ctask->xmstate |= XMSTATE_W_RESEND_DATA_DIGEST;
}
return rc;
}
@ -1526,8 +1524,8 @@ iscsi_send_unsol_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
struct iscsi_data_task *dtask;
int rc;
set_bit(XMSTATE_BIT_UNS_DATA, &tcp_ctask->xmstate);
if (test_bit(XMSTATE_BIT_UNS_INIT, &tcp_ctask->xmstate)) {
tcp_ctask->xmstate |= XMSTATE_UNS_DATA;
if (tcp_ctask->xmstate & XMSTATE_UNS_INIT) {
dtask = &tcp_ctask->unsol_dtask;
iscsi_prep_unsolicit_data_pdu(ctask, &dtask->hdr);
@ -1537,14 +1535,14 @@ iscsi_send_unsol_hdr(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
iscsi_hdr_digest(conn, &tcp_ctask->headbuf,
(u8*)dtask->hdrext);
clear_bit(XMSTATE_BIT_UNS_INIT, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_UNS_INIT;
iscsi_set_padding(tcp_ctask, ctask->data_count);
}
rc = iscsi_sendhdr(conn, &tcp_ctask->headbuf, ctask->data_count);
if (rc) {
clear_bit(XMSTATE_BIT_UNS_DATA, &tcp_ctask->xmstate);
set_bit(XMSTATE_BIT_UNS_HDR, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_UNS_DATA;
tcp_ctask->xmstate |= XMSTATE_UNS_HDR;
return rc;
}
@ -1565,15 +1563,16 @@ iscsi_send_unsol_pdu(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
struct iscsi_tcp_cmd_task *tcp_ctask = ctask->dd_data;
int rc;
if (test_and_clear_bit(XMSTATE_BIT_UNS_HDR, &tcp_ctask->xmstate)) {
if (tcp_ctask->xmstate & XMSTATE_UNS_HDR) {
BUG_ON(!ctask->unsol_count);
tcp_ctask->xmstate &= ~XMSTATE_UNS_HDR;
send_hdr:
rc = iscsi_send_unsol_hdr(conn, ctask);
if (rc)
return rc;
}
if (test_bit(XMSTATE_BIT_UNS_DATA, &tcp_ctask->xmstate)) {
if (tcp_ctask->xmstate & XMSTATE_UNS_DATA) {
struct iscsi_data_task *dtask = &tcp_ctask->unsol_dtask;
int start = tcp_ctask->sent;
@ -1583,14 +1582,14 @@ iscsi_send_unsol_pdu(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
ctask->unsol_count -= tcp_ctask->sent - start;
if (rc)
return rc;
clear_bit(XMSTATE_BIT_UNS_DATA, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_UNS_DATA;
/*
* Done with the Data-Out. Next, check if we need
* to send another unsolicited Data-Out.
*/
if (ctask->unsol_count) {
debug_scsi("sending more uns\n");
set_bit(XMSTATE_BIT_UNS_INIT, &tcp_ctask->xmstate);
tcp_ctask->xmstate |= XMSTATE_UNS_INIT;
goto send_hdr;
}
}
@ -1606,7 +1605,7 @@ static int iscsi_send_sol_pdu(struct iscsi_conn *conn,
struct iscsi_data_task *dtask;
int left, rc;
if (test_bit(XMSTATE_BIT_SOL_HDR_INIT, &tcp_ctask->xmstate)) {
if (tcp_ctask->xmstate & XMSTATE_SOL_HDR_INIT) {
if (!tcp_ctask->r2t) {
spin_lock_bh(&session->lock);
__kfifo_get(tcp_ctask->r2tqueue, (void*)&tcp_ctask->r2t,
@ -1620,19 +1619,19 @@ static int iscsi_send_sol_pdu(struct iscsi_conn *conn,
if (conn->hdrdgst_en)
iscsi_hdr_digest(conn, &r2t->headbuf,
(u8*)dtask->hdrext);
clear_bit(XMSTATE_BIT_SOL_HDR_INIT, &tcp_ctask->xmstate);
set_bit(XMSTATE_BIT_SOL_HDR, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_SOL_HDR_INIT;
tcp_ctask->xmstate |= XMSTATE_SOL_HDR;
}
if (test_bit(XMSTATE_BIT_SOL_HDR, &tcp_ctask->xmstate)) {
if (tcp_ctask->xmstate & XMSTATE_SOL_HDR) {
r2t = tcp_ctask->r2t;
dtask = &r2t->dtask;
rc = iscsi_sendhdr(conn, &r2t->headbuf, r2t->data_count);
if (rc)
return rc;
clear_bit(XMSTATE_BIT_SOL_HDR, &tcp_ctask->xmstate);
set_bit(XMSTATE_BIT_SOL_DATA, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_SOL_HDR;
tcp_ctask->xmstate |= XMSTATE_SOL_DATA;
if (conn->datadgst_en) {
iscsi_data_digest_init(conn->dd_data, tcp_ctask);
@ -1645,7 +1644,7 @@ static int iscsi_send_sol_pdu(struct iscsi_conn *conn,
r2t->sent);
}
if (test_bit(XMSTATE_BIT_SOL_DATA, &tcp_ctask->xmstate)) {
if (tcp_ctask->xmstate & XMSTATE_SOL_DATA) {
r2t = tcp_ctask->r2t;
dtask = &r2t->dtask;
@ -1654,7 +1653,7 @@ static int iscsi_send_sol_pdu(struct iscsi_conn *conn,
&dtask->digestbuf, &dtask->digest);
if (rc)
return rc;
clear_bit(XMSTATE_BIT_SOL_DATA, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_SOL_DATA;
/*
* Done with this Data-Out. Next, check if we have
@ -1699,32 +1698,32 @@ static int iscsi_send_sol_pdu(struct iscsi_conn *conn,
* xmit stages.
*
*iscsi_send_cmd_hdr()
* XMSTATE_BIT_CMD_HDR_INIT - prepare Header and Data buffers Calculate
* Header Digest
* XMSTATE_BIT_CMD_HDR_XMIT - Transmit header in progress
* XMSTATE_CMD_HDR_INIT - prepare Header and Data buffers Calculate
* Header Digest
* XMSTATE_CMD_HDR_XMIT - Transmit header in progress
*
*iscsi_send_padding
* XMSTATE_BIT_W_PAD - Prepare and send pading
* XMSTATE_BIT_W_RESEND_PAD - retry send pading
* XMSTATE_W_PAD - Prepare and send pading
* XMSTATE_W_RESEND_PAD - retry send pading
*
*iscsi_send_digest
* XMSTATE_BIT_W_RESEND_DATA_DIGEST - Finalize and send Data Digest
* XMSTATE_BIT_W_RESEND_DATA_DIGEST - retry sending digest
* XMSTATE_W_RESEND_DATA_DIGEST - Finalize and send Data Digest
* XMSTATE_W_RESEND_DATA_DIGEST - retry sending digest
*
*iscsi_send_unsol_hdr
* XMSTATE_BIT_UNS_INIT - prepare un-solicit data header and digest
* XMSTATE_BIT_UNS_HDR - send un-solicit header
* XMSTATE_UNS_INIT - prepare un-solicit data header and digest
* XMSTATE_UNS_HDR - send un-solicit header
*
*iscsi_send_unsol_pdu
* XMSTATE_BIT_UNS_DATA - send un-solicit data in progress
* XMSTATE_UNS_DATA - send un-solicit data in progress
*
*iscsi_send_sol_pdu
* XMSTATE_BIT_SOL_HDR_INIT - solicit data header and digest initialize
* XMSTATE_BIT_SOL_HDR - send solicit header
* XMSTATE_BIT_SOL_DATA - send solicit data
* XMSTATE_SOL_HDR_INIT - solicit data header and digest initialize
* XMSTATE_SOL_HDR - send solicit header
* XMSTATE_SOL_DATA - send solicit data
*
*iscsi_tcp_ctask_xmit
* XMSTATE_BIT_IMM_DATA - xmit managment data (??)
* XMSTATE_IMM_DATA - xmit managment data (??)
**/
static int
iscsi_tcp_ctask_xmit(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
@ -1741,13 +1740,13 @@ iscsi_tcp_ctask_xmit(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask)
if (ctask->sc->sc_data_direction != DMA_TO_DEVICE)
return 0;
if (test_bit(XMSTATE_BIT_IMM_DATA, &tcp_ctask->xmstate)) {
if (tcp_ctask->xmstate & XMSTATE_IMM_DATA) {
rc = iscsi_send_data(ctask, &tcp_ctask->sendbuf, &tcp_ctask->sg,
&tcp_ctask->sent, &ctask->imm_count,
&tcp_ctask->immbuf, &tcp_ctask->immdigest);
if (rc)
return rc;
clear_bit(XMSTATE_BIT_IMM_DATA, &tcp_ctask->xmstate);
tcp_ctask->xmstate &= ~XMSTATE_IMM_DATA;
}
rc = iscsi_send_unsol_pdu(conn, ctask);
@ -1980,7 +1979,7 @@ static void
iscsi_tcp_mgmt_init(struct iscsi_conn *conn, struct iscsi_mgmt_task *mtask)
{
struct iscsi_tcp_mgmt_task *tcp_mtask = mtask->dd_data;
tcp_mtask->xmstate = 1 << XMSTATE_BIT_IMM_HDR_INIT;
tcp_mtask->xmstate = XMSTATE_IMM_HDR_INIT;
}
static int
@ -2226,6 +2225,7 @@ static struct scsi_host_template iscsi_sht = {
.max_sectors = 0xFFFF,
.cmd_per_lun = ISCSI_DEF_CMD_PER_LUN,
.eh_abort_handler = iscsi_eh_abort,
.eh_device_reset_handler= iscsi_eh_device_reset,
.eh_host_reset_handler = iscsi_eh_host_reset,
.use_clustering = DISABLE_CLUSTERING,
.slave_configure = iscsi_tcp_slave_configure,
@ -2257,7 +2257,8 @@ static struct iscsi_transport iscsi_tcp_transport = {
ISCSI_PERSISTENT_ADDRESS |
ISCSI_TARGET_NAME | ISCSI_TPGT |
ISCSI_USERNAME | ISCSI_PASSWORD |
ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN,
ISCSI_USERNAME_IN | ISCSI_PASSWORD_IN |
ISCSI_FAST_ABORT,
.host_param_mask = ISCSI_HOST_HWADDRESS | ISCSI_HOST_IPADDRESS |
ISCSI_HOST_INITIATOR_NAME |
ISCSI_HOST_NETDEV_NAME,

34
drivers/scsi/iscsi_tcp.h
View file

@ -32,21 +32,21 @@
#define IN_PROGRESS_PAD_RECV 0x4
/* xmit state machine */
#define XMSTATE_VALUE_IDLE 0
#define XMSTATE_BIT_CMD_HDR_INIT 0
#define XMSTATE_BIT_CMD_HDR_XMIT 1
#define XMSTATE_BIT_IMM_HDR 2
#define XMSTATE_BIT_IMM_DATA 3
#define XMSTATE_BIT_UNS_INIT 4
#define XMSTATE_BIT_UNS_HDR 5
#define XMSTATE_BIT_UNS_DATA 6
#define XMSTATE_BIT_SOL_HDR 7
#define XMSTATE_BIT_SOL_DATA 8
#define XMSTATE_BIT_W_PAD 9
#define XMSTATE_BIT_W_RESEND_PAD 10
#define XMSTATE_BIT_W_RESEND_DATA_DIGEST 11
#define XMSTATE_BIT_IMM_HDR_INIT 12
#define XMSTATE_BIT_SOL_HDR_INIT 13
#define XMSTATE_IDLE 0x0
#define XMSTATE_CMD_HDR_INIT 0x1
#define XMSTATE_CMD_HDR_XMIT 0x2
#define XMSTATE_IMM_HDR 0x4
#define XMSTATE_IMM_DATA 0x8
#define XMSTATE_UNS_INIT 0x10
#define XMSTATE_UNS_HDR 0x20
#define XMSTATE_UNS_DATA 0x40
#define XMSTATE_SOL_HDR 0x80
#define XMSTATE_SOL_DATA 0x100
#define XMSTATE_W_PAD 0x200
#define XMSTATE_W_RESEND_PAD 0x400
#define XMSTATE_W_RESEND_DATA_DIGEST 0x800
#define XMSTATE_IMM_HDR_INIT 0x1000
#define XMSTATE_SOL_HDR_INIT 0x2000
#define ISCSI_PAD_LEN 4
#define ISCSI_SG_TABLESIZE SG_ALL
@ -122,7 +122,7 @@ struct iscsi_data_task {
struct iscsi_tcp_mgmt_task {
struct iscsi_hdr hdr;
char hdrext[sizeof(__u32)]; /* Header-Digest */
unsigned long xmstate; /* mgmt xmit progress */
int xmstate; /* mgmt xmit progress */
struct iscsi_buf headbuf; /* header buffer */
struct iscsi_buf sendbuf; /* in progress buffer */
int sent;
@ -150,7 +150,7 @@ struct iscsi_tcp_cmd_task {
int pad_count; /* padded bytes */
struct iscsi_buf headbuf; /* header buf (xmit) */
struct iscsi_buf sendbuf; /* in progress buffer*/
unsigned long xmstate; /* xmit xtate machine */
int xmstate; /* xmit xtate machine */
int sent;
struct scatterlist *sg; /* per-cmd SG list */
struct scatterlist *bad_sg; /* assert statement */

494
drivers/scsi/libiscsi.c
View file

@ -86,7 +86,7 @@ iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr)
* xmit thread
*/
if (!list_empty(&session->leadconn->xmitqueue) ||
__kfifo_len(session->leadconn->mgmtqueue))
!list_empty(&session->leadconn->mgmtqueue))
scsi_queue_work(session->host,
&session->leadconn->xmitwork);
}
@ -318,15 +318,15 @@ static void iscsi_tmf_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
conn->tmfrsp_pdus_cnt++;
if (conn->tmabort_state != TMABORT_INITIAL)
if (conn->tmf_state != TMF_QUEUED)
return;
if (tmf->response == ISCSI_TMF_RSP_COMPLETE)
conn->tmabort_state = TMABORT_SUCCESS;
conn->tmf_state = TMF_SUCCESS;
else if (tmf->response == ISCSI_TMF_RSP_NO_TASK)
conn->tmabort_state = TMABORT_NOT_FOUND;
conn->tmf_state = TMF_NOT_FOUND;
else
conn->tmabort_state = TMABORT_FAILED;
conn->tmf_state = TMF_FAILED;
wake_up(&conn->ehwait);
}
@ -429,7 +429,7 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
*/
if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen))
rc = ISCSI_ERR_CONN_FAILED;
list_del(&mtask->running);
list_del_init(&mtask->running);
if (conn->login_mtask != mtask)
__kfifo_put(session->mgmtpool.queue,
(void*)&mtask, sizeof(void*));
@ -451,10 +451,9 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen))
rc = ISCSI_ERR_CONN_FAILED;
list_del(&mtask->running);
if (conn->login_mtask != mtask)
__kfifo_put(session->mgmtpool.queue,
(void*)&mtask, sizeof(void*));
list_del_init(&mtask->running);
__kfifo_put(session->mgmtpool.queue,
(void*)&mtask, sizeof(void*));
break;
default:
rc = ISCSI_ERR_BAD_OPCODE;
@ -609,7 +608,8 @@ static void iscsi_prep_mtask(struct iscsi_conn *conn,
session->tt->init_mgmt_task(conn, mtask);
debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n",
hdr->opcode, hdr->itt, mtask->data_count);
hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt,
mtask->data_count);
}
static int iscsi_xmit_mtask(struct iscsi_conn *conn)
@ -658,27 +658,35 @@ static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn)
static int iscsi_xmit_ctask(struct iscsi_conn *conn)
{
struct iscsi_cmd_task *ctask = conn->ctask;
int rc = 0;
/*
* serialize with TMF AbortTask
*/
if (ctask->state == ISCSI_TASK_ABORTING)
goto done;
int rc;
__iscsi_get_ctask(ctask);
spin_unlock_bh(&conn->session->lock);
rc = conn->session->tt->xmit_cmd_task(conn, ctask);
spin_lock_bh(&conn->session->lock);
__iscsi_put_ctask(ctask);
done:
if (!rc)
/* done with this ctask */
conn->ctask = NULL;
return rc;
}
/**
* iscsi_requeue_ctask - requeue ctask to run from session workqueue
* @ctask: ctask to requeue
*
* LLDs that need to run a ctask from the session workqueue should call
* this. The session lock must be held.
*/
void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask)
{
struct iscsi_conn *conn = ctask->conn;
list_move_tail(&ctask->running, &conn->requeue);
scsi_queue_work(conn->session->host, &conn->xmitwork);
}
EXPORT_SYMBOL_GPL(iscsi_requeue_ctask);
/**
* iscsi_data_xmit - xmit any command into the scheduled connection
* @conn: iscsi connection
@ -717,36 +725,27 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
* overflow us with nop-ins
*/
check_mgmt:
while (__kfifo_get(conn->mgmtqueue, (void*)&conn->mtask,
sizeof(void*))) {
while (!list_empty(&conn->mgmtqueue)) {
conn->mtask = list_entry(conn->mgmtqueue.next,
struct iscsi_mgmt_task, running);
iscsi_prep_mtask(conn, conn->mtask);
list_add_tail(&conn->mtask->running, &conn->mgmt_run_list);
list_move_tail(conn->mgmtqueue.next, &conn->mgmt_run_list);
rc = iscsi_xmit_mtask(conn);
if (rc)
goto again;
}
/* process command queue */
/* process pending command queue */
while (!list_empty(&conn->xmitqueue)) {
/*
* iscsi tcp may readd the task to the xmitqueue to send
* write data
*/
if (conn->tmf_state == TMF_QUEUED)
break;
conn->ctask = list_entry(conn->xmitqueue.next,
struct iscsi_cmd_task, running);
switch (conn->ctask->state) {
case ISCSI_TASK_ABORTING:
break;
case ISCSI_TASK_PENDING:
iscsi_prep_scsi_cmd_pdu(conn->ctask);
conn->session->tt->init_cmd_task(conn->ctask);
/* fall through */
default:
conn->ctask->state = ISCSI_TASK_RUNNING;
break;
}
iscsi_prep_scsi_cmd_pdu(conn->ctask);
conn->session->tt->init_cmd_task(conn->ctask);
conn->ctask->state = ISCSI_TASK_RUNNING;
list_move_tail(conn->xmitqueue.next, &conn->run_list);
rc = iscsi_xmit_ctask(conn);
if (rc)
goto again;
@ -755,7 +754,22 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
* we need to check the mgmt queue for nops that need to
* be sent to aviod starvation
*/
if (__kfifo_len(conn->mgmtqueue))
if (!list_empty(&conn->mgmtqueue))
goto check_mgmt;
}
while (!list_empty(&conn->requeue)) {
if (conn->session->fast_abort && conn->tmf_state != TMF_INITIAL)
break;
conn->ctask = list_entry(conn->requeue.next,
struct iscsi_cmd_task, running);
conn->ctask->state = ISCSI_TASK_RUNNING;
list_move_tail(conn->requeue.next, &conn->run_list);
rc = iscsi_xmit_ctask(conn);
if (rc)
goto again;
if (!list_empty(&conn->mgmtqueue))
goto check_mgmt;
}
spin_unlock_bh(&conn->session->lock);
@ -859,7 +873,6 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
atomic_set(&ctask->refcount, 1);
ctask->state = ISCSI_TASK_PENDING;
ctask->mtask = NULL;
ctask->conn = conn;
ctask->sc = sc;
INIT_LIST_HEAD(&ctask->running);
@ -929,9 +942,9 @@ __iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
} else
mtask->data_count = 0;
INIT_LIST_HEAD(&mtask->running);
memcpy(mtask->hdr, hdr, sizeof(struct iscsi_hdr));
__kfifo_put(conn->mgmtqueue, (void*)&mtask, sizeof(void*));
INIT_LIST_HEAD(&mtask->running);
list_add_tail(&mtask->running, &conn->mgmtqueue);
return mtask;
}
@ -954,13 +967,12 @@ EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu);
void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session)
{
struct iscsi_session *session = class_to_transport_session(cls_session);
struct iscsi_conn *conn = session->leadconn;
spin_lock_bh(&session->lock);
if (session->state != ISCSI_STATE_LOGGED_IN) {
session->state = ISCSI_STATE_RECOVERY_FAILED;
if (conn)
wake_up(&conn->ehwait);
if (session->leadconn)
wake_up(&session->leadconn->ehwait);
}
spin_unlock_bh(&session->lock);
}
@ -971,7 +983,6 @@ int iscsi_eh_host_reset(struct scsi_cmnd *sc)
struct Scsi_Host *host = sc->device->host;
struct iscsi_session *session = iscsi_hostdata(host->hostdata);
struct iscsi_conn *conn = session->leadconn;
int fail_session = 0;
spin_lock_bh(&session->lock);
if (session->state == ISCSI_STATE_TERMINATE) {
@ -982,19 +993,13 @@ int iscsi_eh_host_reset(struct scsi_cmnd *sc)
return FAILED;
}
if (sc->SCp.phase == session->age) {
debug_scsi("failing connection CID %d due to SCSI host reset\n",
conn->id);
fail_session = 1;
}
spin_unlock_bh(&session->lock);
/*
* we drop the lock here but the leadconn cannot be destoyed while
* we are in the scsi eh
*/
if (fail_session)
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
debug_scsi("iscsi_eh_host_reset wait for relogin\n");
wait_event_interruptible(conn->ehwait,
@ -1015,62 +1020,43 @@ int iscsi_eh_host_reset(struct scsi_cmnd *sc)
}
EXPORT_SYMBOL_GPL(iscsi_eh_host_reset);
static void iscsi_tmabort_timedout(unsigned long data)
static void iscsi_tmf_timedout(unsigned long data)
{
struct iscsi_cmd_task *ctask = (struct iscsi_cmd_task *)data;
struct iscsi_conn *conn = ctask->conn;
struct iscsi_conn *conn = (struct iscsi_conn *)data;
struct iscsi_session *session = conn->session;
spin_lock(&session->lock);
if (conn->tmabort_state == TMABORT_INITIAL) {
conn->tmabort_state = TMABORT_TIMEDOUT;
debug_scsi("tmabort timedout [sc %p itt 0x%x]\n",
ctask->sc, ctask->itt);
if (conn->tmf_state == TMF_QUEUED) {
conn->tmf_state = TMF_TIMEDOUT;
debug_scsi("tmf timedout\n");
/* unblock eh_abort() */
wake_up(&conn->ehwait);
}
spin_unlock(&session->lock);
}
static int iscsi_exec_abort_task(struct scsi_cmnd *sc,
struct iscsi_cmd_task *ctask)
static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
struct iscsi_tm *hdr, int age)
{
struct iscsi_conn *conn = ctask->conn;
struct iscsi_session *session = conn->session;
struct iscsi_tm *hdr = &conn->tmhdr;
struct iscsi_mgmt_task *mtask;
/*
* ctask timed out but session is OK requests must be serialized.
*/
memset(hdr, 0, sizeof(struct iscsi_tm));
hdr->opcode = ISCSI_OP_SCSI_TMFUNC | ISCSI_OP_IMMEDIATE;
hdr->flags = ISCSI_TM_FUNC_ABORT_TASK;
hdr->flags |= ISCSI_FLAG_CMD_FINAL;
memcpy(hdr->lun, ctask->hdr->lun, sizeof(hdr->lun));
hdr->rtt = ctask->hdr->itt;
hdr->refcmdsn = ctask->hdr->cmdsn;
ctask->mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr,
NULL, 0);
if (!ctask->mtask) {
mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr,
NULL, 0);
if (!mtask) {
spin_unlock_bh(&session->lock);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
spin_lock_bh(&session->lock)
debug_scsi("abort sent failure [itt 0x%x]\n", ctask->itt);
spin_lock_bh(&session->lock);
debug_scsi("tmf exec failure\n");
return -EPERM;
}
ctask->state = ISCSI_TASK_ABORTING;
conn->tmfcmd_pdus_cnt++;
conn->tmf_timer.expires = 30 * HZ + jiffies;
conn->tmf_timer.function = iscsi_tmf_timedout;
conn->tmf_timer.data = (unsigned long)conn;
add_timer(&conn->tmf_timer);
debug_scsi("tmf set timeout\n");
debug_scsi("abort sent [itt 0x%x]\n", ctask->itt);
if (conn->tmabort_state == TMABORT_INITIAL) {
conn->tmfcmd_pdus_cnt++;
conn->tmabort_timer.expires = 20*HZ + jiffies;
conn->tmabort_timer.function = iscsi_tmabort_timedout;
conn->tmabort_timer.data = (unsigned long)ctask;
add_timer(&conn->tmabort_timer);
debug_scsi("abort set timeout [itt 0x%x]\n", ctask->itt);
}
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
scsi_queue_work(session->host, &conn->xmitwork);
@ -1078,61 +1064,30 @@ static int iscsi_exec_abort_task(struct scsi_cmnd *sc,
/*
* block eh thread until:
*
* 1) abort response
* 2) abort timeout
* 1) tmf response
* 2) tmf timeout
* 3) session is terminated or restarted or userspace has
* given up on recovery
*/
wait_event_interruptible(conn->ehwait,
sc->SCp.phase != session->age ||
wait_event_interruptible(conn->ehwait, age != session->age ||
session->state != ISCSI_STATE_LOGGED_IN ||
conn->tmabort_state != TMABORT_INITIAL);
conn->tmf_state != TMF_QUEUED);
if (signal_pending(current))
flush_signals(current);
del_timer_sync(&conn->tmabort_timer);
del_timer_sync(&conn->tmf_timer);
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
return 0;
}
/* if the session drops it will clean up the mtask */
if (age != session->age ||
session->state != ISCSI_STATE_LOGGED_IN)
return -ENOTCONN;
/*
* session lock must be held
*/
static struct iscsi_mgmt_task *
iscsi_remove_mgmt_task(struct kfifo *fifo, uint32_t itt)
{
int i, nr_tasks = __kfifo_len(fifo) / sizeof(void*);
struct iscsi_mgmt_task *task;
debug_scsi("searching %d tasks\n", nr_tasks);
for (i = 0; i < nr_tasks; i++) {
__kfifo_get(fifo, (void*)&task, sizeof(void*));
debug_scsi("check task %u\n", task->itt);
if (task->itt == itt) {
debug_scsi("matched task\n");
return task;
}
__kfifo_put(fifo, (void*)&task, sizeof(void*));
if (!list_empty(&mtask->running)) {
list_del_init(&mtask->running);
__kfifo_put(session->mgmtpool.queue, (void*)&mtask,
sizeof(void*));
}
return NULL;
}
static int iscsi_ctask_mtask_cleanup(struct iscsi_cmd_task *ctask)
{
struct iscsi_conn *conn = ctask->conn;
struct iscsi_session *session = conn->session;
if (!ctask->mtask)
return -EINVAL;
if (!iscsi_remove_mgmt_task(conn->mgmtqueue, ctask->mtask->itt))
list_del(&ctask->mtask->running);
__kfifo_put(session->mgmtpool.queue, (void*)&ctask->mtask,
sizeof(void*));
ctask->mtask = NULL;
return 0;
}
@ -1156,7 +1111,6 @@ static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
conn->session->queued_cmdsn--;
else
conn->session->tt->cleanup_cmd_task(conn, ctask);
iscsi_ctask_mtask_cleanup(ctask);
sc->result = err;
scsi_set_resid(sc, scsi_bufflen(sc));
@ -1166,6 +1120,44 @@ static void fail_command(struct iscsi_conn *conn, struct iscsi_cmd_task *ctask,
__iscsi_put_ctask(ctask);
}
/*
* Fail commands. session lock held and recv side suspended and xmit
* thread flushed
*/
static void fail_all_commands(struct iscsi_conn *conn, unsigned lun)
{
struct iscsi_cmd_task *ctask, *tmp;
if (conn->ctask && (conn->ctask->sc->device->lun == lun || lun == -1))
conn->ctask = NULL;
/* flush pending */
list_for_each_entry_safe(ctask, tmp, &conn->xmitqueue, running) {
if (lun == ctask->sc->device->lun || lun == -1) {
debug_scsi("failing pending sc %p itt 0x%x\n",
ctask->sc, ctask->itt);
fail_command(conn, ctask, DID_BUS_BUSY << 16);
}
}
list_for_each_entry_safe(ctask, tmp, &conn->requeue, running) {
if (lun == ctask->sc->device->lun || lun == -1) {
debug_scsi("failing requeued sc %p itt 0x%x\n",
ctask->sc, ctask->itt);
fail_command(conn, ctask, DID_BUS_BUSY << 16);
}
}
/* fail all other running */
list_for_each_entry_safe(ctask, tmp, &conn->run_list, running) {
if (lun == ctask->sc->device->lun || lun == -1) {
debug_scsi("failing in progress sc %p itt 0x%x\n",
ctask->sc, ctask->itt);
fail_command(conn, ctask, DID_BUS_BUSY << 16);
}
}
}
static void iscsi_suspend_tx(struct iscsi_conn *conn)
{
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
@ -1178,13 +1170,26 @@ static void iscsi_start_tx(struct iscsi_conn *conn)
scsi_queue_work(conn->session->host, &conn->xmitwork);
}
static void iscsi_prep_abort_task_pdu(struct iscsi_cmd_task *ctask,
struct iscsi_tm *hdr)
{
memset(hdr, 0, sizeof(*hdr));
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, ctask->hdr->lun, sizeof(hdr->lun));
hdr->rtt = ctask->hdr->itt;
hdr->refcmdsn = ctask->hdr->cmdsn;
}
int iscsi_eh_abort(struct scsi_cmnd *sc)
{
struct Scsi_Host *host = sc->device->host;
struct iscsi_session *session = iscsi_hostdata(host->hostdata);
struct iscsi_cmd_task *ctask;
struct iscsi_conn *conn;
int rc;
struct iscsi_cmd_task *ctask;
struct iscsi_tm *hdr;
int rc, age;
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
@ -1199,19 +1204,23 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
return SUCCESS;
}
ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
conn = ctask->conn;
conn->eh_abort_cnt++;
debug_scsi("aborting [sc %p itt 0x%x]\n", sc, ctask->itt);
/*
* If we are not logged in or we have started a new session
* then let the host reset code handle this
*/
if (session->state != ISCSI_STATE_LOGGED_IN ||
sc->SCp.phase != session->age)
goto failed;
if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN ||
sc->SCp.phase != session->age) {
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
return FAILED;
}
conn = session->leadconn;
conn->eh_abort_cnt++;
age = session->age;
ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
debug_scsi("aborting [sc %p itt 0x%x]\n", sc, ctask->itt);
/* ctask completed before time out */
if (!ctask->sc) {
@ -1219,27 +1228,26 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
goto success;
}
/* what should we do here ? */
if (conn->ctask == ctask) {
printk(KERN_INFO "iscsi: sc %p itt 0x%x partially sent. "
"Failing abort\n", sc, ctask->itt);
goto failed;
}
if (ctask->state == ISCSI_TASK_PENDING) {
fail_command(conn, ctask, DID_ABORT << 16);
goto success;
}
conn->tmabort_state = TMABORT_INITIAL;
rc = iscsi_exec_abort_task(sc, ctask);
if (rc || sc->SCp.phase != session->age ||
session->state != ISCSI_STATE_LOGGED_IN)
/* only have one tmf outstanding at a time */
if (conn->tmf_state != TMF_INITIAL)
goto failed;
iscsi_ctask_mtask_cleanup(ctask);
conn->tmf_state = TMF_QUEUED;
switch (conn->tmabort_state) {
case TMABORT_SUCCESS:
hdr = &conn->tmhdr;
iscsi_prep_abort_task_pdu(ctask, hdr);
if (iscsi_exec_task_mgmt_fn(conn, hdr, age)) {
rc = FAILED;
goto failed;
}
switch (conn->tmf_state) {
case TMF_SUCCESS:
spin_unlock_bh(&session->lock);
iscsi_suspend_tx(conn);
/*
@ -1248,22 +1256,26 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
write_lock_bh(conn->recv_lock);
spin_lock(&session->lock);
fail_command(conn, ctask, DID_ABORT << 16);
conn->tmf_state = TMF_INITIAL;
spin_unlock(&session->lock);
write_unlock_bh(conn->recv_lock);
iscsi_start_tx(conn);
goto success_unlocked;
case TMABORT_NOT_FOUND:
if (!ctask->sc) {
case TMF_TIMEDOUT:
spin_unlock_bh(&session->lock);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
goto failed_unlocked;
case TMF_NOT_FOUND:
if (!sc->SCp.ptr) {
conn->tmf_state = TMF_INITIAL;
/* ctask completed before tmf abort response */
debug_scsi("sc completed while abort in progress\n");
goto success;
}
/* fall through */
default:
/* timedout or failed */
spin_unlock_bh(&session->lock);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
goto failed_unlocked;
conn->tmf_state = TMF_INITIAL;
goto failed;
}
success:
@ -1276,12 +1288,93 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
failed:
spin_unlock_bh(&session->lock);
failed_unlocked:
debug_scsi("abort failed [sc %lx itt 0x%x]\n", (long)sc, ctask->itt);
debug_scsi("abort failed [sc %p itt 0x%x]\n", sc,
ctask ? ctask->itt : 0);
mutex_unlock(&session->eh_mutex);
return FAILED;
}
EXPORT_SYMBOL_GPL(iscsi_eh_abort);
static void iscsi_prep_lun_reset_pdu(struct scsi_cmnd *sc, struct iscsi_tm *hdr)
{
memset(hdr, 0, sizeof(*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);
hdr->rtt = ISCSI_RESERVED_TAG;
}
int iscsi_eh_device_reset(struct scsi_cmnd *sc)
{
struct Scsi_Host *host = sc->device->host;
struct iscsi_session *session = iscsi_hostdata(host->hostdata);
struct iscsi_conn *conn;
struct iscsi_tm *hdr;
int rc = FAILED;
debug_scsi("LU Reset [sc %p lun %u]\n", sc, sc->device->lun);
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
/*
* Just check if we are not logged in. We cannot check for
* the phase because the reset could come from a ioctl.
*/
if (!session->leadconn || session->state != ISCSI_STATE_LOGGED_IN)
goto unlock;
conn = session->leadconn;
/* only have one tmf outstanding at a time */
if (conn->tmf_state != TMF_INITIAL)
goto unlock;
conn->tmf_state = TMF_QUEUED;
hdr = &conn->tmhdr;
iscsi_prep_lun_reset_pdu(sc, hdr);
if (iscsi_exec_task_mgmt_fn(conn, hdr, session->age)) {
rc = FAILED;
goto unlock;
}
switch (conn->tmf_state) {
case TMF_SUCCESS:
break;
case TMF_TIMEDOUT:
spin_unlock_bh(&session->lock);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
goto done;
default:
conn->tmf_state = TMF_INITIAL;
goto unlock;
}
rc = SUCCESS;
spin_unlock_bh(&session->lock);
iscsi_suspend_tx(conn);
/* need to grab the recv lock then session lock */
write_lock_bh(conn->recv_lock);
spin_lock(&session->lock);
fail_all_commands(conn, sc->device->lun);
conn->tmf_state = TMF_INITIAL;
spin_unlock(&session->lock);
write_unlock_bh(conn->recv_lock);
iscsi_start_tx(conn);
goto done;
unlock:
spin_unlock_bh(&session->lock);
done:
debug_scsi("iscsi_eh_device_reset %s\n",
rc == SUCCESS ? "SUCCESS" : "FAILED");
mutex_unlock(&session->eh_mutex);
return rc;
}
EXPORT_SYMBOL_GPL(iscsi_eh_device_reset);
int
iscsi_pool_init(struct iscsi_queue *q, int max, void ***items, int item_size)
{
@ -1546,17 +1639,12 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
conn->c_stage = ISCSI_CONN_INITIAL_STAGE;
conn->id = conn_idx;
conn->exp_statsn = 0;
conn->tmabort_state = TMABORT_INITIAL;
conn->tmf_state = TMF_INITIAL;
INIT_LIST_HEAD(&conn->run_list);
INIT_LIST_HEAD(&conn->mgmt_run_list);
INIT_LIST_HEAD(&conn->mgmtqueue);
INIT_LIST_HEAD(&conn->xmitqueue);
/* initialize general immediate & non-immediate PDU commands queue */
conn->mgmtqueue = kfifo_alloc(session->mgmtpool_max * sizeof(void*),
GFP_KERNEL, NULL);
if (conn->mgmtqueue == ERR_PTR(-ENOMEM))
goto mgmtqueue_alloc_fail;
INIT_LIST_HEAD(&conn->requeue);
INIT_WORK(&conn->xmitwork, iscsi_xmitworker);
/* allocate login_mtask used for the login/text sequences */
@ -1574,7 +1662,7 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
goto login_mtask_data_alloc_fail;
conn->login_mtask->data = conn->data = data;
init_timer(&conn->tmabort_timer);
init_timer(&conn->tmf_timer);
init_waitqueue_head(&conn->ehwait);
return cls_conn;
@ -1583,8 +1671,6 @@ iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
__kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
sizeof(void*));
login_mtask_alloc_fail:
kfifo_free(conn->mgmtqueue);
mgmtqueue_alloc_fail:
iscsi_destroy_conn(cls_conn);
return NULL;
}
@ -1604,7 +1690,6 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
unsigned long flags;
spin_lock_bh(&session->lock);
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
conn->c_stage = ISCSI_CONN_CLEANUP_WAIT;
if (session->leadconn == conn) {
/*
@ -1637,7 +1722,7 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
}
/* flush queued up work because we free the connection below */
scsi_flush_work(session->host);
iscsi_suspend_tx(conn);
spin_lock_bh(&session->lock);
kfree(conn->data);
@ -1648,8 +1733,6 @@ void iscsi_conn_teardown(struct iscsi_cls_conn *cls_conn)
session->leadconn = NULL;
spin_unlock_bh(&session->lock);
kfifo_free(conn->mgmtqueue);
iscsi_destroy_conn(cls_conn);
}
EXPORT_SYMBOL_GPL(iscsi_conn_teardown);
@ -1684,7 +1767,7 @@ int iscsi_conn_start(struct iscsi_cls_conn *cls_conn)
* commands after successful recovery
*/
conn->stop_stage = 0;
conn->tmabort_state = TMABORT_INITIAL;
conn->tmf_state = TMF_INITIAL;
session->age++;
spin_unlock_bh(&session->lock);
@ -1709,10 +1792,11 @@ flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn)
struct iscsi_mgmt_task *mtask, *tmp;
/* handle pending */
while (__kfifo_get(conn->mgmtqueue, (void*)&mtask, sizeof(void*))) {
list_for_each_entry_safe(mtask, tmp, &conn->mgmtqueue, running) {
debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt);
list_del_init(&mtask->running);
if (mtask == conn->login_mtask)
continue;
debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt);
__kfifo_put(session->mgmtpool.queue, (void*)&mtask,
sizeof(void*));
}
@ -1720,7 +1804,7 @@ flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn)
/* handle running */
list_for_each_entry_safe(mtask, tmp, &conn->mgmt_run_list, running) {
debug_scsi("flushing running mgmt task itt 0x%x\n", mtask->itt);
list_del(&mtask->running);
list_del_init(&mtask->running);
if (mtask == conn->login_mtask)
continue;
@ -1731,28 +1815,6 @@ flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn)
conn->mtask = NULL;
}
/* Fail commands. Mutex and session lock held and recv side suspended */
static void fail_all_commands(struct iscsi_conn *conn)
{
struct iscsi_cmd_task *ctask, *tmp;
/* flush pending */
list_for_each_entry_safe(ctask, tmp, &conn->xmitqueue, running) {
debug_scsi("failing pending sc %p itt 0x%x\n", ctask->sc,
ctask->itt);
fail_command(conn, ctask, DID_BUS_BUSY << 16);
}
/* fail all other running */
list_for_each_entry_safe(ctask, tmp, &conn->run_list, running) {
debug_scsi("failing in progress sc %p itt 0x%x\n",
ctask->sc, ctask->itt);
fail_command(conn, ctask, DID_BUS_BUSY << 16);
}
conn->ctask = NULL;
}
static void iscsi_start_session_recovery(struct iscsi_session *session,
struct iscsi_conn *conn, int flag)
{
@ -1818,7 +1880,7 @@ static void iscsi_start_session_recovery(struct iscsi_session *session,
* flush queues.
*/
spin_lock_bh(&session->lock);
fail_all_commands(conn);
fail_all_commands(conn, -1);
flush_control_queues(session, conn);
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
@ -1869,6 +1931,9 @@ int iscsi_set_param(struct iscsi_cls_conn *cls_conn,
uint32_t value;
switch(param) {
case ISCSI_PARAM_FAST_ABORT:
sscanf(buf, "%d", &session->fast_abort);
break;
case ISCSI_PARAM_MAX_RECV_DLENGTH:
sscanf(buf, "%d", &conn->max_recv_dlength);
break;
@ -1983,6 +2048,9 @@ int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
int len;
switch(param) {
case ISCSI_PARAM_FAST_ABORT:
len = sprintf(buf, "%d\n", session->fast_abort);
break;
case ISCSI_PARAM_INITIAL_R2T_EN:
len = sprintf(buf, "%d\n", session->initial_r2t_en);
break;

4
drivers/scsi/scsi_transport_iscsi.c
View file

@ -30,7 +30,7 @@
#include <scsi/scsi_transport_iscsi.h>
#include <scsi/iscsi_if.h>
#define ISCSI_SESSION_ATTRS 15
#define ISCSI_SESSION_ATTRS 16
#define ISCSI_CONN_ATTRS 11
#define ISCSI_HOST_ATTRS 4
#define ISCSI_TRANSPORT_VERSION "2.0-724"
@ -1218,6 +1218,7 @@ iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 1);
#define iscsi_priv_session_attr_show(field, format) \
static ssize_t \
@ -1439,6 +1440,7 @@ iscsi_register_transport(struct iscsi_transport *tt)
SETUP_SESSION_RD_ATTR(password_in, ISCSI_USERNAME_IN);
SETUP_SESSION_RD_ATTR(username, ISCSI_PASSWORD);
SETUP_SESSION_RD_ATTR(username_in, ISCSI_PASSWORD_IN);
SETUP_SESSION_RD_ATTR(fast_abort, ISCSI_FAST_ABORT);
SETUP_PRIV_SESSION_RD_ATTR(recovery_tmo);
BUG_ON(count > ISCSI_SESSION_ATTRS);

2
include/scsi/iscsi_if.h
View file

@ -236,6 +236,7 @@ enum iscsi_param {
ISCSI_PARAM_PASSWORD,
ISCSI_PARAM_PASSWORD_IN,
ISCSI_PARAM_FAST_ABORT,
/* must always be last */
ISCSI_PARAM_MAX,
};
@ -266,6 +267,7 @@ enum iscsi_param {
#define ISCSI_USERNAME_IN (1 << ISCSI_PARAM_USERNAME_IN)
#define ISCSI_PASSWORD (1 << ISCSI_PARAM_PASSWORD)
#define ISCSI_PASSWORD_IN (1 << ISCSI_PARAM_PASSWORD_IN)
#define ISCSI_FAST_ABORT (1 << ISCSI_PARAM_FAST_ABORT)
/* iSCSI HBA params */
enum iscsi_host_param {

2
include/scsi/iscsi_proto.h
View file

@ -600,6 +600,8 @@ struct iscsi_reject {
#define ISCSI_MIN_MAX_BURST_LEN 512
#define ISCSI_MAX_MAX_BURST_LEN 16777215
#define ISCSI_DEF_TIME2WAIT 2
/************************* RFC 3720 End *****************************/
#endif /* ISCSI_PROTO_H */

25
include/scsi/libiscsi.h
View file

@ -57,11 +57,14 @@ struct iscsi_nopin;
#define ISCSI_MAX_CMD_PER_LUN 128
/* Task Mgmt states */
#define TMABORT_INITIAL 0x0
#define TMABORT_SUCCESS 0x1
#define TMABORT_FAILED 0x2
#define TMABORT_TIMEDOUT 0x3
#define TMABORT_NOT_FOUND 0x4
enum {
TMF_INITIAL,
TMF_QUEUED,
TMF_SUCCESS,
TMF_FAILED,
TMF_TIMEDOUT,
TMF_NOT_FOUND,
};
/* Connection suspend "bit" */
#define ISCSI_SUSPEND_BIT 1
@ -91,7 +94,6 @@ enum {
ISCSI_TASK_COMPLETED,
ISCSI_TASK_PENDING,
ISCSI_TASK_RUNNING,
ISCSI_TASK_ABORTING,
};
struct iscsi_cmd_task {
@ -110,7 +112,6 @@ struct iscsi_cmd_task {
unsigned data_count; /* remaining Data-Out */
struct scsi_cmnd *sc; /* associated SCSI cmd*/
struct iscsi_conn *conn; /* used connection */
struct iscsi_mgmt_task *mtask; /* tmf mtask in progr */
/* state set/tested under session->lock */
int state;
@ -152,10 +153,11 @@ struct iscsi_conn {
struct iscsi_cmd_task *ctask; /* xmit ctask in progress */
/* xmit */
struct kfifo *mgmtqueue; /* mgmt (control) xmit queue */
struct list_head mgmtqueue; /* mgmt (control) xmit queue */
struct list_head mgmt_run_list; /* list of control tasks */
struct list_head xmitqueue; /* data-path cmd queue */
struct list_head run_list; /* list of cmds in progress */
struct list_head requeue; /* tasks needing another run */
struct work_struct xmitwork; /* per-conn. xmit workqueue */
unsigned long suspend_tx; /* suspend Tx */
unsigned long suspend_rx; /* suspend Rx */
@ -163,8 +165,8 @@ struct iscsi_conn {
/* abort */
wait_queue_head_t ehwait; /* used in eh_abort() */
struct iscsi_tm tmhdr;
struct timer_list tmabort_timer;
int tmabort_state; /* see TMABORT_INITIAL, etc.*/
struct timer_list tmf_timer;
int tmf_state; /* see TMF_INITIAL, etc.*/
/* negotiated params */
unsigned max_recv_dlength; /* initiator_max_recv_dsl*/
@ -231,6 +233,7 @@ struct iscsi_session {
int pdu_inorder_en;
int dataseq_inorder_en;
int erl;
int fast_abort;
int tpgt;
char *username;
char *username_in;
@ -268,6 +271,7 @@ struct iscsi_session {
extern int iscsi_change_queue_depth(struct scsi_device *sdev, int depth);
extern int iscsi_eh_abort(struct scsi_cmnd *sc);
extern int iscsi_eh_host_reset(struct scsi_cmnd *sc);
extern int iscsi_eh_device_reset(struct scsi_cmnd *sc);
extern int iscsi_queuecommand(struct scsi_cmnd *sc,
void (*done)(struct scsi_cmnd *));
@ -326,6 +330,7 @@ extern int __iscsi_complete_pdu(struct iscsi_conn *, struct iscsi_hdr *,
char *, int);
extern int iscsi_verify_itt(struct iscsi_conn *, struct iscsi_hdr *,
uint32_t *);
extern void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask);
/*
* generic helpers