EXPORT_SYMBOL_GPL(iscsi_check_assign_cmdsn);
void iscsi_prep_unsolicit_data_pdu(struct iscsi_cmd_task *ctask,
- struct iscsi_data *hdr,
- int transport_data_cnt)
+ struct iscsi_data *hdr)
{
struct iscsi_conn *conn = ctask->conn;
hdr->itt = ctask->hdr->itt;
hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
-
- hdr->offset = cpu_to_be32(ctask->total_length -
- transport_data_cnt -
- ctask->unsol_count);
+ hdr->offset = cpu_to_be32(ctask->unsol_offset);
if (ctask->unsol_count > conn->max_xmit_dlength) {
hton24(hdr->dlength, conn->max_xmit_dlength);
ctask->data_count = conn->max_xmit_dlength;
+ ctask->unsol_offset += ctask->data_count;
hdr->flags = 0;
} else {
hton24(hdr->dlength, ctask->unsol_count);
memcpy(hdr->cdb, sc->cmnd, sc->cmd_len);
memset(&hdr->cdb[sc->cmd_len], 0, MAX_COMMAND_SIZE - sc->cmd_len);
+ ctask->data_count = 0;
if (sc->sc_data_direction == DMA_TO_DEVICE) {
hdr->flags |= ISCSI_FLAG_CMD_WRITE;
/*
*/
ctask->imm_count = 0;
ctask->unsol_count = 0;
+ ctask->unsol_offset = 0;
ctask->unsol_datasn = 0;
if (session->imm_data_en) {
} else
zero_data(ctask->hdr->dlength);
- if (!session->initial_r2t_en)
+ if (!session->initial_r2t_en) {
ctask->unsol_count = min(session->first_burst,
ctask->total_length) - ctask->imm_count;
+ ctask->unsol_offset = ctask->imm_count;
+ }
+
if (!ctask->unsol_count)
/* No unsolicit Data-Out's */
ctask->hdr->flags |= ISCSI_FLAG_CMD_FINAL;
/**
* iscsi_complete_command - return command back to scsi-ml
- * @session: iscsi session
* @ctask: iscsi cmd task
*
* Must be called with session lock.
* This function returns the scsi command to scsi-ml and returns
* the cmd task to the pool of available cmd tasks.
*/
-static void iscsi_complete_command(struct iscsi_session *session,
- struct iscsi_cmd_task *ctask)
+static void iscsi_complete_command(struct iscsi_cmd_task *ctask)
{
+ struct iscsi_session *session = ctask->conn->session;
struct scsi_cmnd *sc = ctask->sc;
ctask->state = ISCSI_TASK_COMPLETED;
ctask->sc = NULL;
+ /* SCSI eh reuses commands to verify us */
+ sc->SCp.ptr = NULL;
list_del_init(&ctask->running);
__kfifo_put(session->cmdpool.queue, (void*)&ctask, sizeof(void*));
sc->scsi_done(sc);
}
+static void __iscsi_get_ctask(struct iscsi_cmd_task *ctask)
+{
+ atomic_inc(&ctask->refcount);
+}
+
+static void iscsi_get_ctask(struct iscsi_cmd_task *ctask)
+{
+ spin_lock_bh(&ctask->conn->session->lock);
+ __iscsi_get_ctask(ctask);
+ spin_unlock_bh(&ctask->conn->session->lock);
+}
+
+static void __iscsi_put_ctask(struct iscsi_cmd_task *ctask)
+{
+ if (atomic_dec_and_test(&ctask->refcount))
+ iscsi_complete_command(ctask);
+}
+
+static void iscsi_put_ctask(struct iscsi_cmd_task *ctask)
+{
+ spin_lock_bh(&ctask->conn->session->lock);
+ __iscsi_put_ctask(ctask);
+ spin_unlock_bh(&ctask->conn->session->lock);
+}
+
/**
* iscsi_cmd_rsp - SCSI Command Response processing
* @conn: iscsi connection
(long)sc, sc->result, ctask->itt);
conn->scsirsp_pdus_cnt++;
- iscsi_complete_command(conn->session, ctask);
+ __iscsi_put_ctask(ctask);
return rc;
}
wake_up(&conn->ehwait);
}
+static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
+ char *data, int datalen)
+{
+ struct iscsi_reject *reject = (struct iscsi_reject *)hdr;
+ struct iscsi_hdr rejected_pdu;
+ uint32_t itt;
+
+ conn->exp_statsn = be32_to_cpu(reject->statsn) + 1;
+
+ if (reject->reason == ISCSI_REASON_DATA_DIGEST_ERROR) {
+ if (ntoh24(reject->dlength) > datalen)
+ return ISCSI_ERR_PROTO;
+
+ if (ntoh24(reject->dlength) >= sizeof(struct iscsi_hdr)) {
+ memcpy(&rejected_pdu, data, sizeof(struct iscsi_hdr));
+ itt = rejected_pdu.itt & ISCSI_ITT_MASK;
+ printk(KERN_ERR "itt 0x%x had pdu (op 0x%x) rejected "
+ "due to DataDigest error.\n", itt,
+ rejected_pdu.opcode);
+ }
+ }
+ return 0;
+}
+
/**
* __iscsi_complete_pdu - complete pdu
* @conn: iscsi conn
BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
if (hdr->flags & ISCSI_FLAG_DATA_STATUS) {
conn->scsirsp_pdus_cnt++;
- iscsi_complete_command(session, ctask);
+ __iscsi_put_ctask(ctask);
}
break;
case ISCSI_OP_R2T:
switch(opcode) {
case ISCSI_OP_LOGOUT_RSP:
+ if (datalen) {
+ rc = ISCSI_ERR_PROTO;
+ break;
+ }
conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
/* fall through */
case ISCSI_OP_LOGIN_RSP:
* login related PDU's exp_statsn is handled in
* userspace
*/
- rc = iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen);
+ 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,
iscsi_tmf_rsp(conn, hdr);
break;
case ISCSI_OP_NOOP_IN:
- if (hdr->ttt != ISCSI_RESERVED_TAG) {
+ if (hdr->ttt != ISCSI_RESERVED_TAG || datalen) {
rc = ISCSI_ERR_PROTO;
break;
}
conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
- rc = iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen);
+ 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,
break;
}
} else if (itt == ISCSI_RESERVED_TAG) {
+ rc = iscsi_check_assign_cmdsn(session,
+ (struct iscsi_nopin*)hdr);
+ if (rc)
+ goto done;
+
switch(opcode) {
case ISCSI_OP_NOOP_IN:
- if (!datalen) {
- rc = iscsi_check_assign_cmdsn(session,
- (struct iscsi_nopin*)hdr);
- if (!rc && hdr->ttt != ISCSI_RESERVED_TAG)
- rc = iscsi_recv_pdu(conn->cls_conn,
- hdr, NULL, 0);
- } else
+ if (datalen) {
rc = ISCSI_ERR_PROTO;
+ break;
+ }
+
+ if (hdr->ttt == ISCSI_RESERVED_TAG)
+ break;
+
+ if (iscsi_recv_pdu(conn->cls_conn, hdr, NULL, 0))
+ rc = ISCSI_ERR_CONN_FAILED;
break;
case ISCSI_OP_REJECT:
- /* we need sth like iscsi_reject_rsp()*/
+ rc = iscsi_handle_reject(conn, hdr, data, datalen);
+ break;
case ISCSI_OP_ASYNC_EVENT:
conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
/* we need sth like iscsi_async_event_rsp() */
BUG_ON(conn->ctask && conn->mtask);
if (conn->ctask) {
+ iscsi_get_ctask(conn->ctask);
rc = tt->xmit_cmd_task(conn, conn->ctask);
+ iscsi_put_ctask(conn->ctask);
if (rc)
goto again;
/* done with this in-progress ctask */
struct iscsi_cmd_task, running);
conn->ctask->state = ISCSI_TASK_RUNNING;
list_move_tail(conn->xmitqueue.next, &conn->run_list);
+ __iscsi_get_ctask(conn->ctask);
spin_unlock_bh(&conn->session->lock);
rc = tt->xmit_cmd_task(conn, conn->ctask);
if (rc)
goto again;
+
spin_lock_bh(&conn->session->lock);
+ __iscsi_put_ctask(conn->ctask);
+ if (rc) {
+ spin_unlock_bh(&conn->session->lock);
+ goto again;
+ }
}
spin_unlock_bh(&conn->session->lock);
/* done with this ctask */
FAILURE_SESSION_FAILED,
FAILURE_SESSION_FREED,
FAILURE_WINDOW_CLOSED,
+ FAILURE_OOM,
FAILURE_SESSION_TERMINATE,
FAILURE_SESSION_IN_RECOVERY,
FAILURE_SESSION_RECOVERY_TIMEOUT,
sc->scsi_done = done;
sc->result = 0;
+ sc->SCp.ptr = NULL;
host = sc->device->host;
session = iscsi_hostdata(host->hostdata);
conn = session->leadconn;
- __kfifo_get(session->cmdpool.queue, (void*)&ctask, sizeof(void*));
+ if (!__kfifo_get(session->cmdpool.queue, (void*)&ctask,
+ sizeof(void*))) {
+ reason = FAILURE_OOM;
+ goto reject;
+ }
sc->SCp.phase = session->age;
sc->SCp.ptr = (char *)ctask;
+ atomic_set(&ctask->refcount, 1);
ctask->state = ISCSI_TASK_PENDING;
ctask->mtask = NULL;
ctask->conn = conn;
list_add_tail(&ctask->running, &conn->xmitqueue);
debug_scsi(
- "ctask enq [%s cid %d sc %lx itt 0x%x len %d cmdsn %d win %d]\n",
+ "ctask enq [%s cid %d sc %p cdb 0x%x itt 0x%x len %d cmdsn %d "
+ "win %d]\n",
sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read",
- conn->id, (long)sc, ctask->itt, sc->request_bufflen,
+ conn->id, sc, sc->cmnd[0], ctask->itt, sc->request_bufflen,
session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
spin_unlock(&session->lock);
sc->result = err;
sc->resid = sc->request_bufflen;
- iscsi_complete_command(conn->session, ctask);
+ /* release ref from queuecommand */
+ __iscsi_put_ctask(ctask);
}
int iscsi_eh_abort(struct scsi_cmnd *sc)
{
- struct iscsi_cmd_task *ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
- struct iscsi_conn *conn = ctask->conn;
- struct iscsi_session *session = conn->session;
+ struct iscsi_cmd_task *ctask;
+ struct iscsi_conn *conn;
+ struct iscsi_session *session;
int rc;
+ /*
+ * if session was ISCSI_STATE_IN_RECOVERY then we may not have
+ * got the command.
+ */
+ if (!sc->SCp.ptr) {
+ debug_scsi("sc never reached iscsi layer or it completed.\n");
+ return SUCCESS;
+ }
+
+ ctask = (struct iscsi_cmd_task *)sc->SCp.ptr;
+ conn = ctask->conn;
+ session = conn->session;
+
conn->eh_abort_cnt++;
debug_scsi("aborting [sc %p itt 0x%x]\n", sc, ctask->itt);
{
struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+ struct module *owner = cls_session->transport->owner;
scsi_remove_host(shost);
iscsi_pool_free(&session->mgmtpool, (void**)session->mgmt_cmds);
iscsi_pool_free(&session->cmdpool, (void**)session->cmds);
+ kfree(session->targetname);
+
iscsi_destroy_session(cls_session);
scsi_host_put(shost);
- module_put(cls_session->transport->owner);
+ module_put(owner);
}
EXPORT_SYMBOL_GPL(iscsi_session_teardown);
data = kmalloc(DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH, GFP_KERNEL);
if (!data)
goto login_mtask_data_alloc_fail;
- conn->login_mtask->data = data;
+ conn->login_mtask->data = conn->data = data;
init_timer(&conn->tmabort_timer);
mutex_init(&conn->xmitmutex);
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
mutex_lock(&conn->xmitmutex);
- if (conn->c_stage == ISCSI_CONN_INITIAL_STAGE) {
- if (session->tt->suspend_conn_recv)
- session->tt->suspend_conn_recv(conn);
-
- session->tt->terminate_conn(conn);
- }
spin_lock_bh(&session->lock);
conn->c_stage = ISCSI_CONN_CLEANUP_WAIT;
}
spin_lock_bh(&session->lock);
- kfree(conn->login_mtask->data);
+ kfree(conn->data);
+ kfree(conn->persistent_address);
__kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
sizeof(void*));
list_del(&conn->item);
struct iscsi_conn *conn = cls_conn->dd_data;
struct iscsi_session *session = conn->session;
- if (session == NULL) {
+ if (!session) {
printk(KERN_ERR "iscsi: can't start unbound connection\n");
return -EPERM;
}
+ if ((session->imm_data_en || !session->initial_r2t_en) &&
+ session->first_burst > session->max_burst) {
+ printk("iscsi: invalid burst lengths: "
+ "first_burst %d max_burst %d\n",
+ session->first_burst, session->max_burst);
+ return -EINVAL;
+ }
+
spin_lock_bh(&session->lock);
conn->c_stage = ISCSI_CONN_STARTED;
session->state = ISCSI_STATE_LOGGED_IN;
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
spin_unlock_bh(&session->lock);
- if (session->tt->suspend_conn_recv)
- session->tt->suspend_conn_recv(conn);
+ write_lock_bh(conn->recv_lock);
+ set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx);
+ write_unlock_bh(conn->recv_lock);
mutex_lock(&conn->xmitmutex);
/*
}
}
- session->tt->terminate_conn(conn);
/*
* flush queues.
*/
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff