#include <scsi/scsi_transport_iscsi.h>
#include <scsi/libiscsi.h>
-struct iscsi_session *
-class_to_transport_session(struct iscsi_cls_session *cls_session)
-{
- struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
- return iscsi_hostdata(shost->hostdata);
-}
-EXPORT_SYMBOL_GPL(class_to_transport_session);
-
/* Serial Number Arithmetic, 32 bits, less than, RFC1982 */
#define SNA32_CHECK 2147483648UL
* xmit thread
*/
if (!list_empty(&session->leadconn->xmitqueue) ||
- !list_empty(&session->leadconn->mgmtqueue))
- scsi_queue_work(session->host,
- &session->leadconn->xmitwork);
+ !list_empty(&session->leadconn->mgmtqueue)) {
+ if (!(session->tt->caps & CAP_DATA_PATH_OFFLOAD))
+ scsi_queue_work(session->host,
+ &session->leadconn->xmitwork);
+ }
}
}
EXPORT_SYMBOL_GPL(iscsi_update_cmdsn);
/**
* iscsi_prep_scsi_cmd_pdu - prep iscsi scsi cmd pdu
- * @ctask: iscsi cmd task
+ * @ctask: iscsi task
*
* Prep basic iSCSI PDU fields for a scsi cmd pdu. The LLD should set
* fields like dlength or final based on how much data it sends
WARN_ON(hdrlength >= 256);
hdr->hlength = hdrlength & 0xFF;
- if (conn->session->tt->init_cmd_task(conn->ctask))
- return EIO;
+ if (conn->session->tt->init_task &&
+ conn->session->tt->init_task(ctask))
+ return -EIO;
+
+ ctask->state = ISCSI_TASK_RUNNING;
+ list_move_tail(&ctask->running, &conn->run_list);
conn->scsicmd_pdus_cnt++;
- debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x "
- "len %d bidi_len %d cmdsn %d win %d]\n",
- scsi_bidi_cmnd(sc) ? "bidirectional" :
- sc->sc_data_direction == DMA_TO_DEVICE ? "write" : "read",
- conn->id, sc, sc->cmnd[0], ctask->itt,
- scsi_bufflen(sc), scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0,
- session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
+ debug_scsi("iscsi prep [%s cid %d sc %p cdb 0x%x itt 0x%x len %d "
+ "bidi_len %d cmdsn %d win %d]\n", scsi_bidi_cmnd(sc) ?
+ "bidirectional" : sc->sc_data_direction == DMA_TO_DEVICE ?
+ "write" : "read", conn->id, sc, sc->cmnd[0], ctask->itt,
+ scsi_bufflen(sc),
+ scsi_bidi_cmnd(sc) ? scsi_in(sc)->length : 0,
+ session->cmdsn, session->max_cmdsn - session->exp_cmdsn + 1);
return 0;
}
/**
- * iscsi_complete_command - return command back to scsi-ml
+ * iscsi_complete_command - finish a task
* @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.
+ * This function returns the scsi command to scsi-ml or cleans
+ * up mgmt tasks then returns the task to the pool.
*/
static void iscsi_complete_command(struct iscsi_cmd_task *ctask)
{
struct iscsi_session *session = conn->session;
struct scsi_cmnd *sc = ctask->sc;
+ list_del_init(&ctask->running);
ctask->state = ISCSI_TASK_COMPLETED;
ctask->sc = NULL;
- /* SCSI eh reuses commands to verify us */
- sc->SCp.ptr = NULL;
+
if (conn->ctask == ctask)
conn->ctask = NULL;
- list_del_init(&ctask->running);
+ /*
+ * login ctask is preallocated so do not free
+ */
+ if (conn->login_ctask == ctask)
+ return;
+
__kfifo_put(session->cmdpool.queue, (void*)&ctask, sizeof(void*));
- sc->scsi_done(sc);
+
+ if (conn->ping_ctask == ctask)
+ conn->ping_ctask = NULL;
+
+ if (sc) {
+ ctask->sc = NULL;
+ /* SCSI eh reuses commands to verify us */
+ sc->SCp.ptr = NULL;
+ /*
+ * queue command may call this to free the task, but
+ * not have setup the sc callback
+ */
+ if (sc->scsi_done)
+ sc->scsi_done(sc);
+ }
}
static void __iscsi_get_ctask(struct iscsi_cmd_task *ctask)
iscsi_complete_command(ctask);
}
+void iscsi_put_ctask(struct iscsi_cmd_task *ctask)
+{
+ struct iscsi_session *session = ctask->conn->session;
+
+ spin_lock_bh(&session->lock);
+ __iscsi_put_ctask(ctask);
+ spin_unlock_bh(&session->lock);
+}
+EXPORT_SYMBOL_GPL(iscsi_put_ctask);
+
/*
* session lock must be held
*/
*/
conn->session->queued_cmdsn--;
else
- conn->session->tt->cleanup_cmd_task(conn, ctask);
+ conn->session->tt->cleanup_task(conn, ctask);
sc->result = err;
+
if (!scsi_bidi_cmnd(sc))
scsi_set_resid(sc, scsi_bufflen(sc));
else {
scsi_out(sc)->resid = scsi_out(sc)->length;
scsi_in(sc)->resid = scsi_in(sc)->length;
}
+
if (conn->ctask == ctask)
conn->ctask = NULL;
/* release ref from queuecommand */
__iscsi_put_ctask(ctask);
}
-/**
- * iscsi_free_mgmt_task - return mgmt task back to pool
- * @conn: iscsi connection
- * @mtask: mtask
- *
- * Must be called with session lock.
- */
-void iscsi_free_mgmt_task(struct iscsi_conn *conn,
- struct iscsi_mgmt_task *mtask)
+static int iscsi_prep_mgmt_task(struct iscsi_conn *conn,
+ struct iscsi_cmd_task *ctask)
{
- list_del_init(&mtask->running);
- if (conn->login_mtask == mtask)
- return;
+ struct iscsi_session *session = conn->session;
+ struct iscsi_hdr *hdr = (struct iscsi_hdr *)ctask->hdr;
+ struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr;
+
+ if (conn->session->state == ISCSI_STATE_LOGGING_OUT)
+ return -ENOTCONN;
- if (conn->ping_mtask == mtask)
- conn->ping_mtask = NULL;
- __kfifo_put(conn->session->mgmtpool.queue,
- (void*)&mtask, sizeof(void*));
+ if (hdr->opcode != (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) &&
+ hdr->opcode != (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE))
+ nop->exp_statsn = cpu_to_be32(conn->exp_statsn);
+ /*
+ * pre-format CmdSN for outgoing PDU.
+ */
+ nop->cmdsn = cpu_to_be32(session->cmdsn);
+ if (hdr->itt != RESERVED_ITT) {
+ hdr->itt = build_itt(ctask->itt, session->age);
+ /*
+ * TODO: We always use immediate, so we never hit this.
+ * If we start to send tmfs or nops as non-immediate then
+ * we should start checking the cmdsn numbers for mgmt tasks.
+ */
+ if (conn->c_stage == ISCSI_CONN_STARTED &&
+ !(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
+ session->queued_cmdsn++;
+ session->cmdsn++;
+ }
+ }
+
+ if (session->tt->init_task)
+ session->tt->init_task(ctask);
+
+ if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT)
+ session->state = ISCSI_STATE_LOGGING_OUT;
+
+ list_move_tail(&ctask->running, &conn->mgmt_run_list);
+ debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n",
+ hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt,
+ ctask->data_count);
+ return 0;
}
-EXPORT_SYMBOL_GPL(iscsi_free_mgmt_task);
-static struct iscsi_mgmt_task *
+static struct iscsi_cmd_task *
__iscsi_conn_send_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
char *data, uint32_t data_size)
{
struct iscsi_session *session = conn->session;
- struct iscsi_mgmt_task *mtask;
+ struct iscsi_cmd_task *ctask;
if (session->state == ISCSI_STATE_TERMINATE)
return NULL;
/*
* Login and Text are sent serially, in
* request-followed-by-response sequence.
- * Same mtask can be used. Same ITT must be used.
- * Note that login_mtask is preallocated at conn_create().
+ * Same task can be used. Same ITT must be used.
+ * Note that login_task is preallocated at conn_create().
*/
- mtask = conn->login_mtask;
+ ctask = conn->login_ctask;
else {
BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE);
BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED);
- if (!__kfifo_get(session->mgmtpool.queue,
- (void*)&mtask, sizeof(void*)))
+ if (!__kfifo_get(session->cmdpool.queue,
+ (void*)&ctask, sizeof(void*)))
return NULL;
+
+ if ((hdr->opcode == (ISCSI_OP_NOOP_OUT | ISCSI_OP_IMMEDIATE)) &&
+ hdr->ttt == RESERVED_ITT) {
+ conn->ping_ctask = ctask;
+ conn->last_ping = jiffies;
+ }
}
+ /*
+ * released in complete pdu for task we expect a response for, and
+ * released by the lld when it has transmitted the task for
+ * pdus we do not expect a response for.
+ */
+ atomic_set(&ctask->refcount, 1);
+ ctask->conn = conn;
+ ctask->sc = NULL;
if (data_size) {
- memcpy(mtask->data, data, data_size);
- mtask->data_count = data_size;
+ memcpy(ctask->data, data, data_size);
+ ctask->data_count = data_size;
+ } else
+ ctask->data_count = 0;
+
+ memcpy(ctask->hdr, hdr, sizeof(struct iscsi_hdr));
+ INIT_LIST_HEAD(&ctask->running);
+ list_add_tail(&ctask->running, &conn->mgmtqueue);
+
+ if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) {
+ if (iscsi_prep_mgmt_task(conn, ctask)) {
+ __iscsi_put_ctask(ctask);
+ return NULL;
+ }
+
+ if (session->tt->xmit_task(ctask))
+ ctask = NULL;
+
} else
- mtask->data_count = 0;
+ scsi_queue_work(conn->session->host, &conn->xmitwork);
- memcpy(mtask->hdr, hdr, sizeof(struct iscsi_hdr));
- INIT_LIST_HEAD(&mtask->running);
- list_add_tail(&mtask->running, &conn->mgmtqueue);
- return mtask;
+ return ctask;
}
int iscsi_conn_send_pdu(struct iscsi_cls_conn *cls_conn, struct iscsi_hdr *hdr,
if (!__iscsi_conn_send_pdu(conn, hdr, data, data_size))
err = -EPERM;
spin_unlock_bh(&session->lock);
- scsi_queue_work(session->host, &conn->xmitwork);
return err;
}
EXPORT_SYMBOL_GPL(iscsi_conn_send_pdu);
* @datalen: len of buffer
*
* iscsi_cmd_rsp sets up the scsi_cmnd fields based on the PDU and
- * then completes the command and task.
+ * then completes the command and ctask.
**/
static void iscsi_scsi_cmd_rsp(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
struct iscsi_cmd_task *ctask, char *data,
static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr)
{
struct iscsi_nopout hdr;
- struct iscsi_mgmt_task *mtask;
+ struct iscsi_cmd_task *ctask;
- if (!rhdr && conn->ping_mtask)
+ if (!rhdr && conn->ping_ctask)
return;
memset(&hdr, 0, sizeof(struct iscsi_nopout));
} else
hdr.ttt = RESERVED_ITT;
- mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0);
- if (!mtask) {
+ ctask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)&hdr, NULL, 0);
+ if (!ctask)
iscsi_conn_printk(KERN_ERR, conn, "Could not send nopout\n");
- return;
- }
-
- /* only track our nops */
- if (!rhdr) {
- conn->ping_mtask = mtask;
- conn->last_ping = jiffies;
- }
- scsi_queue_work(conn->session->host, &conn->xmitwork);
}
static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
struct iscsi_session *session = conn->session;
int opcode = hdr->opcode & ISCSI_OPCODE_MASK, rc = 0;
struct iscsi_cmd_task *ctask;
- struct iscsi_mgmt_task *mtask;
uint32_t itt;
conn->last_recv = jiffies;
+ rc = iscsi_verify_itt(conn, hdr->itt);
+ if (rc)
+ return rc;
+
if (hdr->itt != RESERVED_ITT)
itt = get_itt(hdr->itt);
else
itt = ~0U;
- if (itt < session->cmds_max) {
- ctask = session->cmds[itt];
-
- debug_scsi("cmdrsp [op 0x%x cid %d itt 0x%x len %d]\n",
- opcode, conn->id, ctask->itt, datalen);
-
- switch(opcode) {
- case ISCSI_OP_SCSI_CMD_RSP:
- BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
- iscsi_scsi_cmd_rsp(conn, hdr, ctask, data,
- datalen);
- break;
- case ISCSI_OP_SCSI_DATA_IN:
- BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
- if (hdr->flags & ISCSI_FLAG_DATA_STATUS) {
- conn->scsirsp_pdus_cnt++;
- __iscsi_put_ctask(ctask);
- }
- break;
- case ISCSI_OP_R2T:
- /* LLD handles this for now */
- break;
- default:
- rc = ISCSI_ERR_BAD_OPCODE;
- break;
- }
- } else if (itt >= ISCSI_MGMT_ITT_OFFSET &&
- itt < ISCSI_MGMT_ITT_OFFSET + session->mgmtpool_max) {
- mtask = session->mgmt_cmds[itt - ISCSI_MGMT_ITT_OFFSET];
-
- debug_scsi("immrsp [op 0x%x cid %d itt 0x%x len %d]\n",
- opcode, conn->id, mtask->itt, datalen);
-
- iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
- 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:
- case ISCSI_OP_TEXT_RSP:
- /*
- * login related PDU's exp_statsn is handled in
- * userspace
- */
- if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen))
- rc = ISCSI_ERR_CONN_FAILED;
- iscsi_free_mgmt_task(conn, mtask);
- break;
- case ISCSI_OP_SCSI_TMFUNC_RSP:
- if (datalen) {
- rc = ISCSI_ERR_PROTO;
- break;
- }
-
- iscsi_tmf_rsp(conn, hdr);
- iscsi_free_mgmt_task(conn, mtask);
- break;
- case ISCSI_OP_NOOP_IN:
- if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) ||
- datalen) {
- rc = ISCSI_ERR_PROTO;
- break;
- }
- conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
+ debug_scsi("[op 0x%x cid %d itt 0x%x len %d]\n",
+ opcode, conn->id, itt, datalen);
- if (conn->ping_mtask != mtask) {
- /*
- * If this is not in response to one of our
- * nops then it must be from userspace.
- */
- if (iscsi_recv_pdu(conn->cls_conn, hdr, data,
- datalen))
- rc = ISCSI_ERR_CONN_FAILED;
- }
- iscsi_free_mgmt_task(conn, mtask);
- break;
- default:
- rc = ISCSI_ERR_BAD_OPCODE;
- break;
- }
- } else if (itt == ~0U) {
+ if (itt == ~0U) {
iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
switch(opcode) {
rc = ISCSI_ERR_BAD_OPCODE;
break;
}
- } else
- rc = ISCSI_ERR_BAD_ITT;
+ goto out;
+ }
+ ctask = session->cmds[itt];
+ switch(opcode) {
+ case ISCSI_OP_SCSI_CMD_RSP:
+ if (!ctask->sc) {
+ rc = ISCSI_ERR_NO_SCSI_CMD;
+ break;
+ }
+ BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
+ iscsi_scsi_cmd_rsp(conn, hdr, ctask, data, datalen);
+ break;
+ case ISCSI_OP_SCSI_DATA_IN:
+ if (!ctask->sc) {
+ rc = ISCSI_ERR_NO_SCSI_CMD;
+ break;
+ }
+ BUG_ON((void*)ctask != ctask->sc->SCp.ptr);
+ if (hdr->flags & ISCSI_FLAG_DATA_STATUS) {
+ conn->scsirsp_pdus_cnt++;
+ iscsi_update_cmdsn(session,
+ (struct iscsi_nopin*) hdr);
+ __iscsi_put_ctask(ctask);
+ }
+ break;
+ case ISCSI_OP_R2T:
+ /* LLD handles this for now */
+ break;
+ case ISCSI_OP_LOGOUT_RSP:
+ iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
+ if (datalen) {
+ rc = ISCSI_ERR_PROTO;
+ break;
+ }
+ conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
+ goto recv_pdu;
+ case ISCSI_OP_LOGIN_RSP:
+ case ISCSI_OP_TEXT_RSP:
+ iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
+ /*
+ * login related PDU's exp_statsn is handled in
+ * userspace
+ */
+ goto recv_pdu;
+ case ISCSI_OP_SCSI_TMFUNC_RSP:
+ iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
+ if (datalen) {
+ rc = ISCSI_ERR_PROTO;
+ break;
+ }
+
+ iscsi_tmf_rsp(conn, hdr);
+ __iscsi_put_ctask(ctask);
+ break;
+ case ISCSI_OP_NOOP_IN:
+ iscsi_update_cmdsn(session, (struct iscsi_nopin*)hdr);
+ if (hdr->ttt != cpu_to_be32(ISCSI_RESERVED_TAG) || datalen) {
+ rc = ISCSI_ERR_PROTO;
+ break;
+ }
+ conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
+
+ if (conn->ping_ctask != ctask)
+ /*
+ * If this is not in response to one of our
+ * nops then it must be from userspace.
+ */
+ goto recv_pdu;
+ __iscsi_put_ctask(ctask);
+ break;
+ default:
+ rc = ISCSI_ERR_BAD_OPCODE;
+ break;
+ }
+
+out:
+ return rc;
+recv_pdu:
+ if (iscsi_recv_pdu(conn->cls_conn, hdr, data, datalen))
+ rc = ISCSI_ERR_CONN_FAILED;
+ __iscsi_put_ctask(ctask);
return rc;
}
}
EXPORT_SYMBOL_GPL(iscsi_complete_pdu);
-/* verify itt (itt encoding: age+cid+itt) */
-int iscsi_verify_itt(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
- uint32_t *ret_itt)
+int iscsi_verify_itt(struct iscsi_conn *conn, itt_t itt)
{
struct iscsi_session *session = conn->session;
struct iscsi_cmd_task *ctask;
- uint32_t itt;
-
- if (hdr->itt != RESERVED_ITT) {
- if (((__force u32)hdr->itt & ISCSI_AGE_MASK) !=
- (session->age << ISCSI_AGE_SHIFT)) {
- iscsi_conn_printk(KERN_ERR, conn,
- "received itt %x expected session "
- "age (%x)\n", (__force u32)hdr->itt,
- session->age & ISCSI_AGE_MASK);
- return ISCSI_ERR_BAD_ITT;
- }
+ uint32_t i;
- itt = get_itt(hdr->itt);
- } else
- itt = ~0U;
+ if (itt == RESERVED_ITT)
+ return 0;
- if (itt < session->cmds_max) {
- ctask = session->cmds[itt];
-
- if (!ctask->sc) {
- iscsi_conn_printk(KERN_INFO, conn, "dropping ctask "
- "with itt 0x%x\n", ctask->itt);
- /* force drop */
- return ISCSI_ERR_NO_SCSI_CMD;
- }
+ if (((__force u32)itt & ISCSI_AGE_MASK) !=
+ (session->age << ISCSI_AGE_SHIFT)) {
+ iscsi_conn_printk(KERN_ERR, conn,
+ "received itt %x expected session age (%x)\n",
+ (__force u32)itt,
+ session->age & ISCSI_AGE_MASK);
+ return ISCSI_ERR_BAD_ITT;
+ }
- if (ctask->sc->SCp.phase != session->age) {
- iscsi_conn_printk(KERN_ERR, conn,
- "iscsi: ctask's session age %d, "
- "expected %d\n", ctask->sc->SCp.phase,
- session->age);
- return ISCSI_ERR_SESSION_FAILED;
- }
+ i = get_itt(itt);
+ if (i >= session->cmds_max) {
+ iscsi_conn_printk(KERN_ERR, conn,
+ "received invalid itt index %u (max cmds "
+ "%u.\n", i, session->cmds_max);
+ return ISCSI_ERR_BAD_ITT;
}
- *ret_itt = itt;
+ ctask = session->cmds[i];
+ if (ctask->sc && ctask->sc->SCp.phase != session->age) {
+ iscsi_conn_printk(KERN_ERR, conn,
+ "iscsi: ctask's session age %d, "
+ "expected %d\n", ctask->sc->SCp.phase,
+ session->age);
+ return ISCSI_ERR_SESSION_FAILED;
+ }
return 0;
}
EXPORT_SYMBOL_GPL(iscsi_verify_itt);
+struct iscsi_cmd_task *
+iscsi_itt_to_ctask(struct iscsi_conn *conn, itt_t itt)
+{
+ struct iscsi_session *session = conn->session;
+ struct iscsi_cmd_task *ctask;
+ uint32_t i;
+
+ if (iscsi_verify_itt(conn, itt))
+ return NULL;
+
+ if (itt == RESERVED_ITT)
+ return NULL;
+
+ i = get_itt(itt);
+ if (i >= session->cmds_max)
+ return NULL;
+
+ ctask = session->cmds[i];
+ if (!ctask->sc)
+ return NULL;
+
+ if (ctask->sc->SCp.phase != session->age)
+ return NULL;
+
+ return ctask;
+}
+EXPORT_SYMBOL_GPL(iscsi_itt_to_ctask);
+
void iscsi_conn_failure(struct iscsi_conn *conn, enum iscsi_err err)
{
struct iscsi_session *session = conn->session;
}
EXPORT_SYMBOL_GPL(iscsi_conn_failure);
-static void iscsi_prep_mtask(struct iscsi_conn *conn,
- struct iscsi_mgmt_task *mtask)
-{
- struct iscsi_session *session = conn->session;
- struct iscsi_hdr *hdr = mtask->hdr;
- struct iscsi_nopout *nop = (struct iscsi_nopout *)hdr;
-
- if (hdr->opcode != (ISCSI_OP_LOGIN | ISCSI_OP_IMMEDIATE) &&
- hdr->opcode != (ISCSI_OP_TEXT | ISCSI_OP_IMMEDIATE))
- nop->exp_statsn = cpu_to_be32(conn->exp_statsn);
- /*
- * pre-format CmdSN for outgoing PDU.
- */
- nop->cmdsn = cpu_to_be32(session->cmdsn);
- if (hdr->itt != RESERVED_ITT) {
- hdr->itt = build_itt(mtask->itt, session->age);
- /*
- * TODO: We always use immediate, so we never hit this.
- * If we start to send tmfs or nops as non-immediate then
- * we should start checking the cmdsn numbers for mgmt tasks.
- */
- if (conn->c_stage == ISCSI_CONN_STARTED &&
- !(hdr->opcode & ISCSI_OP_IMMEDIATE)) {
- session->queued_cmdsn++;
- session->cmdsn++;
- }
- }
-
- if (session->tt->init_mgmt_task)
- session->tt->init_mgmt_task(conn, mtask);
-
- debug_scsi("mgmtpdu [op 0x%x hdr->itt 0x%x datalen %d]\n",
- hdr->opcode & ISCSI_OPCODE_MASK, hdr->itt,
- mtask->data_count);
-}
-
-static int iscsi_xmit_mtask(struct iscsi_conn *conn)
-{
- struct iscsi_hdr *hdr = conn->mtask->hdr;
- int rc;
-
- if ((hdr->opcode & ISCSI_OPCODE_MASK) == ISCSI_OP_LOGOUT)
- conn->session->state = ISCSI_STATE_LOGGING_OUT;
- spin_unlock_bh(&conn->session->lock);
-
- rc = conn->session->tt->xmit_mgmt_task(conn, conn->mtask);
- spin_lock_bh(&conn->session->lock);
- if (rc)
- return rc;
-
- /* done with this in-progress mtask */
- conn->mtask = NULL;
- return 0;
-}
-
static int iscsi_check_cmdsn_window_closed(struct iscsi_conn *conn)
{
struct iscsi_session *session = conn->session;
__iscsi_get_ctask(ctask);
spin_unlock_bh(&conn->session->lock);
- rc = conn->session->tt->xmit_cmd_task(conn, ctask);
+ rc = conn->session->tt->xmit_task(ctask);
spin_lock_bh(&conn->session->lock);
__iscsi_put_ctask(ctask);
if (!rc)
* @ctask: ctask to requeue
*
* LLDs that need to run a ctask from the session workqueue should call
- * this. The session lock must be held.
+ * this. The session lock must be held. This should only be called
+ * by software drivers.
*/
void iscsi_requeue_ctask(struct iscsi_cmd_task *ctask)
{
if (conn->ctask) {
rc = iscsi_xmit_ctask(conn);
- if (rc)
- goto again;
- }
-
- if (conn->mtask) {
- rc = iscsi_xmit_mtask(conn);
if (rc)
goto again;
}
*/
check_mgmt:
while (!list_empty(&conn->mgmtqueue)) {
- conn->mtask = list_entry(conn->mgmtqueue.next,
- struct iscsi_mgmt_task, running);
- if (conn->session->state == ISCSI_STATE_LOGGING_OUT) {
- iscsi_free_mgmt_task(conn, conn->mtask);
- conn->mtask = NULL;
+ conn->ctask = list_entry(conn->mgmtqueue.next,
+ struct iscsi_cmd_task, running);
+ if (iscsi_prep_mgmt_task(conn, conn->ctask)) {
+ __iscsi_put_ctask(conn->ctask);
+ conn->ctask = NULL;
continue;
}
-
- iscsi_prep_mtask(conn, conn->mtask);
- list_move_tail(conn->mgmtqueue.next, &conn->mgmt_run_list);
- rc = iscsi_xmit_mtask(conn);
+ rc = iscsi_xmit_ctask(conn);
if (rc)
goto again;
}
fail_command(conn, conn->ctask, DID_ABORT << 16);
continue;
}
-
- conn->ctask->state = ISCSI_TASK_RUNNING;
- list_move_tail(conn->xmitqueue.next, &conn->run_list);
rc = iscsi_xmit_ctask(conn);
if (rc)
goto again;
int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
{
+ struct iscsi_cls_session *cls_session;
struct Scsi_Host *host;
int reason = 0;
struct iscsi_session *session;
host = sc->device->host;
spin_unlock(host->host_lock);
- session = iscsi_hostdata(host->hostdata);
+ cls_session = starget_to_session(scsi_target(sc->device));
+ session = cls_session->dd_data;
spin_lock(&session->lock);
- reason = iscsi_session_chkready(session_to_cls(session));
+ reason = iscsi_session_chkready(cls_session);
if (reason) {
sc->result = reason;
goto fault;
reason = FAILURE_OOM;
goto reject;
}
- session->queued_cmdsn++;
-
sc->SCp.phase = session->age;
sc->SCp.ptr = (char *)ctask;
ctask->conn = conn;
ctask->sc = sc;
INIT_LIST_HEAD(&ctask->running);
-
list_add_tail(&ctask->running, &conn->xmitqueue);
- spin_unlock(&session->lock);
- scsi_queue_work(host, &conn->xmitwork);
+ if (session->tt->caps & CAP_DATA_PATH_OFFLOAD) {
+ if (iscsi_prep_scsi_cmd_pdu(ctask)) {
+ sc->result = DID_ABORT << 16;
+ sc->scsi_done = NULL;
+ iscsi_complete_command(ctask);
+ goto fault;
+ }
+ if (session->tt->xmit_task(ctask)) {
+ sc->scsi_done = NULL;
+ iscsi_complete_command(ctask);
+ reason = FAILURE_SESSION_NOT_READY;
+ goto reject;
+ }
+ } else
+ scsi_queue_work(session->host, &conn->xmitwork);
+
+ session->queued_cmdsn++;
+ spin_unlock(&session->lock);
spin_lock(host->host_lock);
return 0;
scsi_out(sc)->resid = scsi_out(sc)->length;
scsi_in(sc)->resid = scsi_in(sc)->length;
}
- sc->scsi_done(sc);
+ done(sc);
spin_lock(host->host_lock);
return 0;
}
void iscsi_session_recovery_timedout(struct iscsi_cls_session *cls_session)
{
- struct iscsi_session *session = class_to_transport_session(cls_session);
+ struct iscsi_session *session = cls_session->dd_data;
spin_lock_bh(&session->lock);
if (session->state != ISCSI_STATE_LOGGED_IN) {
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;
+ struct iscsi_cls_session *cls_session;
+ struct iscsi_session *session;
+ struct iscsi_conn *conn;
+
+ cls_session = starget_to_session(scsi_target(sc->device));
+ session = cls_session->dd_data;
+ conn = session->leadconn;
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
spin_unlock(&session->lock);
}
-static int iscsi_exec_task_mgmt_fn(struct iscsi_conn *conn,
+static int iscsi_exec_ctask_mgmt_fn(struct iscsi_conn *conn,
struct iscsi_tm *hdr, int age,
int timeout)
{
struct iscsi_session *session = conn->session;
- struct iscsi_mgmt_task *mtask;
+ struct iscsi_cmd_task *ctask;
- mtask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr,
+ ctask = __iscsi_conn_send_pdu(conn, (struct iscsi_hdr *)hdr,
NULL, 0);
- if (!mtask) {
+ if (!ctask) {
spin_unlock_bh(&session->lock);
iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
spin_lock_bh(&session->lock);
spin_unlock_bh(&session->lock);
mutex_unlock(&session->eh_mutex);
- scsi_queue_work(session->host, &conn->xmitwork);
/*
* block eh thread until:
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
- /* if the session drops it will clean up the mtask */
+ /* if the session drops it will clean up the ctask */
if (age != session->age ||
session->state != ISCSI_STATE_LOGGED_IN)
return -ENOTCONN;
}
}
-static void iscsi_suspend_tx(struct iscsi_conn *conn)
+void iscsi_suspend_tx(struct iscsi_conn *conn)
{
set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
- scsi_flush_work(conn->session->host);
+ if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD))
+ scsi_flush_work(conn->session->host);
}
+EXPORT_SYMBOL_GPL(iscsi_suspend_tx);
static void iscsi_start_tx(struct iscsi_conn *conn)
{
clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
- scsi_queue_work(conn->session->host, &conn->xmitwork);
+ if (!(conn->session->tt->caps & CAP_DATA_PATH_OFFLOAD))
+ scsi_queue_work(conn->session->host, &conn->xmitwork);
}
static enum scsi_eh_timer_return iscsi_eh_cmd_timed_out(struct scsi_cmnd *scmd)
enum scsi_eh_timer_return rc = EH_NOT_HANDLED;
cls_session = starget_to_session(scsi_target(scmd->device));
- session = class_to_transport_session(cls_session);
+ session = cls_session->dd_data;
debug_scsi("scsi cmd %p timedout\n", scmd);
jiffies))
rc = EH_RESET_TIMER;
/* if in the middle of checking the transport then give us more time */
- if (conn->ping_mtask)
+ if (conn->ping_ctask)
rc = EH_RESET_TIMER;
done:
spin_unlock(&session->lock);
{
struct iscsi_conn *conn = (struct iscsi_conn *)data;
struct iscsi_session *session = conn->session;
- unsigned long timeout, next_timeout = 0, last_recv;
+ unsigned long recv_timeout, next_timeout = 0, last_recv;
spin_lock(&session->lock);
if (session->state != ISCSI_STATE_LOGGED_IN)
goto done;
- timeout = conn->recv_timeout;
- if (!timeout)
+ recv_timeout = conn->recv_timeout;
+ if (!recv_timeout)
goto done;
- timeout *= HZ;
+ recv_timeout *= HZ;
last_recv = conn->last_recv;
- if (time_before_eq(last_recv + timeout + (conn->ping_timeout * HZ),
+ if (conn->ping_ctask &&
+ time_before_eq(conn->last_ping + (conn->ping_timeout * HZ),
jiffies)) {
iscsi_conn_printk(KERN_ERR, conn, "ping timeout of %d secs "
"expired, last rx %lu, last ping %lu, "
return;
}
- if (time_before_eq(last_recv + timeout, jiffies)) {
- if (time_before_eq(conn->last_ping, last_recv)) {
- /* send a ping to try to provoke some traffic */
- debug_scsi("Sending nopout as ping on conn %p\n", conn);
- iscsi_send_nopout(conn, NULL);
- }
- next_timeout = last_recv + timeout + (conn->ping_timeout * HZ);
+ if (time_before_eq(last_recv + recv_timeout, jiffies)) {
+ /* send a ping to try to provoke some traffic */
+ debug_scsi("Sending nopout as ping on conn %p\n", conn);
+ iscsi_send_nopout(conn, NULL);
+ next_timeout = conn->last_ping + (conn->ping_timeout * HZ);
} else
- next_timeout = last_recv + timeout;
+ next_timeout = last_recv + recv_timeout;
debug_scsi("Setting next tmo %lu\n", next_timeout);
mod_timer(&conn->transport_timer, next_timeout);
spin_unlock(&session->lock);
}
-static void iscsi_prep_abort_task_pdu(struct iscsi_cmd_task *ctask,
+static void iscsi_prep_abort_ctask_pdu(struct iscsi_cmd_task *ctask,
struct iscsi_tm *hdr)
{
memset(hdr, 0, sizeof(*hdr));
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_cls_session *cls_session;
+ struct iscsi_session *session;
struct iscsi_conn *conn;
struct iscsi_cmd_task *ctask;
struct iscsi_tm *hdr;
int rc, age;
+ cls_session = starget_to_session(scsi_target(sc->device));
+ session = cls_session->dd_data;
+
mutex_lock(&session->eh_mutex);
spin_lock_bh(&session->lock);
/*
conn->tmf_state = TMF_QUEUED;
hdr = &conn->tmhdr;
- iscsi_prep_abort_task_pdu(ctask, hdr);
+ iscsi_prep_abort_ctask_pdu(ctask, hdr);
- if (iscsi_exec_task_mgmt_fn(conn, hdr, age, session->abort_timeout)) {
+ if (iscsi_exec_ctask_mgmt_fn(conn, hdr, age, session->abort_timeout)) {
rc = FAILED;
goto failed;
}
spin_unlock_bh(&session->lock);
iscsi_suspend_tx(conn);
/*
- * clean up task if aborted. grab the recv lock as a writer
+ * clean up ctask if aborted. grab the recv lock as a writer
*/
write_lock_bh(conn->recv_lock);
spin_lock(&session->lock);
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_cls_session *cls_session;
+ struct iscsi_session *session;
struct iscsi_conn *conn;
struct iscsi_tm *hdr;
int rc = FAILED;
+ cls_session = starget_to_session(scsi_target(sc->device));
+ session = cls_session->dd_data;
+
debug_scsi("LU Reset [sc %p lun %u]\n", sc, sc->device->lun);
mutex_lock(&session->eh_mutex);
hdr = &conn->tmhdr;
iscsi_prep_lun_reset_pdu(sc, hdr);
- if (iscsi_exec_task_mgmt_fn(conn, hdr, session->age,
+ if (iscsi_exec_ctask_mgmt_fn(conn, hdr, session->age,
session->lu_reset_timeout)) {
rc = FAILED;
goto unlock;
}
EXPORT_SYMBOL_GPL(iscsi_pool_free);
-/*
- * iSCSI Session's hostdata organization:
+/**
+ * iscsi_host_add - add host to system
+ * @shost: scsi host
+ * @pdev: parent device
*
- * *------------------* <== hostdata_session(host->hostdata)
- * | ptr to class sess|
- * |------------------| <== iscsi_hostdata(host->hostdata)
- * | iscsi_session |
- * *------------------*
+ * This should be called by partial offload and software iscsi drivers
+ * to add a host to the system.
*/
+int iscsi_host_add(struct Scsi_Host *shost, struct device *pdev)
+{
+ return scsi_add_host(shost, pdev);
+}
+EXPORT_SYMBOL_GPL(iscsi_host_add);
-#define hostdata_privsize(_sz) (sizeof(unsigned long) + _sz + \
- _sz % sizeof(unsigned long))
+/**
+ * iscsi_host_alloc - allocate a host and driver data
+ * @sht: scsi host template
+ * @dd_data_size: driver host data size
+ * @qdepth: default device queue depth
+ *
+ * This should be called by partial offload and software iscsi drivers.
+ * To access the driver specific memory use the iscsi_host_priv() macro.
+ */
+struct Scsi_Host *iscsi_host_alloc(struct scsi_host_template *sht,
+ int dd_data_size, uint16_t qdepth)
+{
+ struct Scsi_Host *shost;
-#define hostdata_session(_hostdata) (iscsi_ptr(*(unsigned long *)_hostdata))
+ shost = scsi_host_alloc(sht, sizeof(struct iscsi_host) + dd_data_size);
+ if (!shost)
+ return NULL;
+ shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out;
+
+ if (qdepth > ISCSI_MAX_CMD_PER_LUN || qdepth < 1) {
+ if (qdepth != 0)
+ printk(KERN_ERR "iscsi: invalid queue depth of %d. "
+ "Queue depth must be between 1 and %d.\n",
+ qdepth, ISCSI_MAX_CMD_PER_LUN);
+ qdepth = ISCSI_DEF_CMD_PER_LUN;
+ }
+ shost->cmd_per_lun = qdepth;
+ return shost;
+}
+EXPORT_SYMBOL_GPL(iscsi_host_alloc);
+
+/**
+ * iscsi_host_remove - remove host and sessions
+ * @shost: scsi host
+ *
+ * This will also remove any sessions attached to the host, but if userspace
+ * is managing the session at the same time this will break. TODO: add
+ * refcounting to the netlink iscsi interface so a rmmod or host hot unplug
+ * does not remove the memory from under us.
+ */
+void iscsi_host_remove(struct Scsi_Host *shost)
+{
+ iscsi_host_for_each_session(shost, iscsi_session_teardown);
+ scsi_remove_host(shost);
+}
+EXPORT_SYMBOL_GPL(iscsi_host_remove);
+
+void iscsi_host_free(struct Scsi_Host *shost)
+{
+ struct iscsi_host *ihost = shost_priv(shost);
+
+ kfree(ihost->netdev);
+ kfree(ihost->hwaddress);
+ kfree(ihost->initiatorname);
+ scsi_host_put(shost);
+}
+EXPORT_SYMBOL_GPL(iscsi_host_free);
/**
* iscsi_session_setup - create iscsi cls session and host and session
- * @scsit: scsi transport template
* @iscsit: iscsi transport template
- * @cmds_max: scsi host can queue
- * @qdepth: scsi host cmds per lun
- * @cmd_task_size: LLD ctask private data size
- * @mgmt_task_size: LLD mtask private data size
+ * @shost: scsi host
+ * @cmds_max: session can queue
+ * @cmd_ctask_size: LLD ctask private data size
* @initial_cmdsn: initial CmdSN
- * @hostno: host no allocated
*
* This can be used by software iscsi_transports that allocate
* a session per scsi host.
- **/
+ */
struct iscsi_cls_session *
-iscsi_session_setup(struct iscsi_transport *iscsit,
- struct scsi_transport_template *scsit,
- uint16_t cmds_max, uint16_t qdepth,
- int cmd_task_size, int mgmt_task_size,
- uint32_t initial_cmdsn, uint32_t *hostno)
+iscsi_session_setup(struct iscsi_transport *iscsit, struct Scsi_Host *shost,
+ uint16_t scsi_cmds_max, int cmd_ctask_size,
+ uint32_t initial_cmdsn)
{
- struct Scsi_Host *shost;
struct iscsi_session *session;
struct iscsi_cls_session *cls_session;
- int cmd_i;
-
- if (qdepth > ISCSI_MAX_CMD_PER_LUN || qdepth < 1) {
- if (qdepth != 0)
- printk(KERN_ERR "iscsi: invalid queue depth of %d. "
- "Queue depth must be between 1 and %d.\n",
- qdepth, ISCSI_MAX_CMD_PER_LUN);
- qdepth = ISCSI_DEF_CMD_PER_LUN;
- }
+ int cmd_i, cmds_max;
- if (!is_power_of_2(cmds_max) || cmds_max >= ISCSI_MGMT_ITT_OFFSET ||
- cmds_max < 2) {
- if (cmds_max != 0)
- printk(KERN_ERR "iscsi: invalid can_queue of %d. "
- "can_queue must be a power of 2 and between "
- "2 and %d - setting to %d.\n", cmds_max,
- ISCSI_MGMT_ITT_OFFSET, ISCSI_DEF_XMIT_CMDS_MAX);
- cmds_max = ISCSI_DEF_XMIT_CMDS_MAX;
- }
-
- shost = scsi_host_alloc(iscsit->host_template,
- hostdata_privsize(sizeof(*session)));
- if (!shost)
+ /*
+ * The iscsi layer needs some ctasks for nop handling and tmfs.
+ */
+ if (scsi_cmds_max < 1)
+ scsi_cmds_max = ISCSI_MGMT_CMDS_MAX;
+ if ((scsi_cmds_max + ISCSI_MGMT_CMDS_MAX) >= ISCSI_MGMT_ITT_OFFSET) {
+ printk(KERN_ERR "iscsi: invalid can_queue of %d. "
+ "can_queue must be less than %d.\n",
+ scsi_cmds_max,
+ ISCSI_MGMT_ITT_OFFSET - ISCSI_MGMT_CMDS_MAX);
+ scsi_cmds_max = ISCSI_DEF_XMIT_CMDS_MAX;
+ }
+ cmds_max = roundup_pow_of_two(scsi_cmds_max + ISCSI_MGMT_CMDS_MAX);
+
+ cls_session = iscsi_alloc_session(shost, iscsit,
+ sizeof(struct iscsi_session));
+ if (!cls_session)
return NULL;
-
- /* the iscsi layer takes one task for reserve */
- shost->can_queue = cmds_max - 1;
- shost->cmd_per_lun = qdepth;
- shost->max_id = 1;
- shost->max_channel = 0;
- shost->max_lun = iscsit->max_lun;
- shost->max_cmd_len = iscsit->max_cmd_len;
- shost->transportt = scsit;
- shost->transportt->create_work_queue = 1;
- shost->transportt->eh_timed_out = iscsi_eh_cmd_timed_out;
- *hostno = shost->host_no;
-
- session = iscsi_hostdata(shost->hostdata);
- memset(session, 0, sizeof(struct iscsi_session));
+ session = cls_session->dd_data;
+ session->cls_session = cls_session;
session->host = shost;
session->state = ISCSI_STATE_FREE;
session->fast_abort = 1;
session->lu_reset_timeout = 15;
session->abort_timeout = 10;
- session->mgmtpool_max = ISCSI_MGMT_CMDS_MAX;
+ session->scsi_cmds_max = scsi_cmds_max;
session->cmds_max = cmds_max;
session->queued_cmdsn = session->cmdsn = initial_cmdsn;
session->exp_cmdsn = initial_cmdsn + 1;
session->max_r2t = 1;
session->tt = iscsit;
mutex_init(&session->eh_mutex);
+ spin_lock_init(&session->lock);
/* initialize SCSI PDU commands pool */
if (iscsi_pool_init(&session->cmdpool, session->cmds_max,
(void***)&session->cmds,
- cmd_task_size + sizeof(struct iscsi_cmd_task)))
+ cmd_ctask_size + sizeof(struct iscsi_cmd_task)))
goto cmdpool_alloc_fail;
/* pre-format cmds pool with ITT */
for (cmd_i = 0; cmd_i < session->cmds_max; cmd_i++) {
struct iscsi_cmd_task *ctask = session->cmds[cmd_i];
- if (cmd_task_size)
+ if (cmd_ctask_size)
ctask->dd_data = &ctask[1];
ctask->itt = cmd_i;
INIT_LIST_HEAD(&ctask->running);
}
- spin_lock_init(&session->lock);
-
- /* initialize immediate command pool */
- if (iscsi_pool_init(&session->mgmtpool, session->mgmtpool_max,
- (void***)&session->mgmt_cmds,
- mgmt_task_size + sizeof(struct iscsi_mgmt_task)))
- goto mgmtpool_alloc_fail;
-
-
- /* pre-format immediate cmds pool with ITT */
- for (cmd_i = 0; cmd_i < session->mgmtpool_max; cmd_i++) {
- struct iscsi_mgmt_task *mtask = session->mgmt_cmds[cmd_i];
-
- if (mgmt_task_size)
- mtask->dd_data = &mtask[1];
- mtask->itt = ISCSI_MGMT_ITT_OFFSET + cmd_i;
- INIT_LIST_HEAD(&mtask->running);
- }
-
- if (scsi_add_host(shost, NULL))
- goto add_host_fail;
-
if (!try_module_get(iscsit->owner))
- goto cls_session_fail;
-
- cls_session = iscsi_create_session(shost, iscsit, 0);
- if (!cls_session)
- goto module_put;
- *(unsigned long*)shost->hostdata = (unsigned long)cls_session;
+ goto module_get_fail;
+ if (iscsi_add_session(cls_session, 0))
+ goto cls_session_fail;
return cls_session;
-module_put:
- module_put(iscsit->owner);
cls_session_fail:
- scsi_remove_host(shost);
-add_host_fail:
- iscsi_pool_free(&session->mgmtpool);
-mgmtpool_alloc_fail:
+ module_put(iscsit->owner);
+module_get_fail:
iscsi_pool_free(&session->cmdpool);
cmdpool_alloc_fail:
- scsi_host_put(shost);
+ iscsi_free_session(cls_session);
return NULL;
}
EXPORT_SYMBOL_GPL(iscsi_session_setup);
/**
* iscsi_session_teardown - destroy session, host, and cls_session
- * shost: scsi host
+ * @cls_session: iscsi session
*
- * This can be used by software iscsi_transports that allocate
- * a session per scsi host.
- **/
+ * The driver must have called iscsi_remove_session before
+ * calling this.
+ */
void iscsi_session_teardown(struct iscsi_cls_session *cls_session)
{
- struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
- struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+ struct iscsi_session *session = cls_session->dd_data;
struct module *owner = cls_session->transport->owner;
- iscsi_remove_session(cls_session);
- scsi_remove_host(shost);
-
- iscsi_pool_free(&session->mgmtpool);
iscsi_pool_free(&session->cmdpool);
kfree(session->password);
kfree(session->username);
kfree(session->username_in);
kfree(session->targetname);
- kfree(session->netdev);
- kfree(session->hwaddress);
- kfree(session->initiatorname);
- iscsi_free_session(cls_session);
- scsi_host_put(shost);
+ iscsi_destroy_session(cls_session);
module_put(owner);
}
EXPORT_SYMBOL_GPL(iscsi_session_teardown);
/**
* iscsi_conn_setup - create iscsi_cls_conn and iscsi_conn
* @cls_session: iscsi_cls_session
+ * @dd_size: private driver data size
* @conn_idx: cid
- **/
+ */
struct iscsi_cls_conn *
-iscsi_conn_setup(struct iscsi_cls_session *cls_session, uint32_t conn_idx)
+iscsi_conn_setup(struct iscsi_cls_session *cls_session, int dd_size,
+ uint32_t conn_idx)
{
- struct iscsi_session *session = class_to_transport_session(cls_session);
+ struct iscsi_session *session = cls_session->dd_data;
struct iscsi_conn *conn;
struct iscsi_cls_conn *cls_conn;
char *data;
- cls_conn = iscsi_create_conn(cls_session, conn_idx);
+ cls_conn = iscsi_create_conn(cls_session, sizeof(*conn) + dd_size,
+ conn_idx);
if (!cls_conn)
return NULL;
conn = cls_conn->dd_data;
- memset(conn, 0, sizeof(*conn));
+ memset(conn, 0, sizeof(*conn) + dd_size);
+ conn->dd_data = cls_conn->dd_data + sizeof(*conn);
conn->session = session;
conn->cls_conn = cls_conn;
conn->c_stage = ISCSI_CONN_INITIAL_STAGE;
INIT_LIST_HEAD(&conn->requeue);
INIT_WORK(&conn->xmitwork, iscsi_xmitworker);
- /* allocate login_mtask used for the login/text sequences */
+ /* allocate login_ctask used for the login/text sequences */
spin_lock_bh(&session->lock);
- if (!__kfifo_get(session->mgmtpool.queue,
- (void*)&conn->login_mtask,
+ if (!__kfifo_get(session->cmdpool.queue,
+ (void*)&conn->login_ctask,
sizeof(void*))) {
spin_unlock_bh(&session->lock);
- goto login_mtask_alloc_fail;
+ goto login_ctask_alloc_fail;
}
spin_unlock_bh(&session->lock);
data = kmalloc(ISCSI_DEF_MAX_RECV_SEG_LEN, GFP_KERNEL);
if (!data)
- goto login_mtask_data_alloc_fail;
- conn->login_mtask->data = conn->data = data;
+ goto login_ctask_data_alloc_fail;
+ conn->login_ctask->data = conn->data = data;
init_timer(&conn->tmf_timer);
init_waitqueue_head(&conn->ehwait);
return cls_conn;
-login_mtask_data_alloc_fail:
- __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
+login_ctask_data_alloc_fail:
+ __kfifo_put(session->cmdpool.queue, (void*)&conn->login_ctask,
sizeof(void*));
-login_mtask_alloc_fail:
+login_ctask_alloc_fail:
iscsi_destroy_conn(cls_conn);
return NULL;
}
spin_lock_bh(&session->lock);
kfree(conn->data);
kfree(conn->persistent_address);
- __kfifo_put(session->mgmtpool.queue, (void*)&conn->login_mtask,
+ __kfifo_put(session->cmdpool.queue, (void*)&conn->login_ctask,
sizeof(void*));
if (session->leadconn == conn)
session->leadconn = NULL;
}
spin_unlock_bh(&session->lock);
- iscsi_unblock_session(session_to_cls(session));
+ iscsi_unblock_session(session->cls_session);
wake_up(&conn->ehwait);
return 0;
}
static void
flush_control_queues(struct iscsi_session *session, struct iscsi_conn *conn)
{
- struct iscsi_mgmt_task *mtask, *tmp;
+ struct iscsi_cmd_task *ctask, *tmp;
/* handle pending */
- list_for_each_entry_safe(mtask, tmp, &conn->mgmtqueue, running) {
- debug_scsi("flushing pending mgmt task itt 0x%x\n", mtask->itt);
- iscsi_free_mgmt_task(conn, mtask);
+ list_for_each_entry_safe(ctask, tmp, &conn->mgmtqueue, running) {
+ debug_scsi("flushing pending mgmt ctask itt 0x%x\n", ctask->itt);
+ /* release ref from prep ctask */
+ __iscsi_put_ctask(ctask);
}
/* 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);
- iscsi_free_mgmt_task(conn, mtask);
+ list_for_each_entry_safe(ctask, tmp, &conn->mgmt_run_list, running) {
+ debug_scsi("flushing running mgmt ctask itt 0x%x\n", ctask->itt);
+ /* release ref from prep ctask */
+ __iscsi_put_ctask(ctask);
}
- conn->mtask = NULL;
+ conn->ctask = NULL;
}
static void iscsi_start_session_recovery(struct iscsi_session *session,
/*
* When this is called for the in_login state, we only want to clean
- * up the login task and connection. We do not need to block and set
+ * up the login ctask and connection. We do not need to block and set
* the recovery state again
*/
if (flag == STOP_CONN_TERM)
if (session->state == ISCSI_STATE_IN_RECOVERY &&
old_stop_stage != STOP_CONN_RECOVER) {
debug_scsi("blocking session\n");
- iscsi_block_session(session_to_cls(session));
+ iscsi_block_session(session->cls_session);
}
}
int iscsi_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn, int is_leading)
{
- struct iscsi_session *session = class_to_transport_session(cls_session);
+ struct iscsi_session *session = cls_session->dd_data;
struct iscsi_conn *conn = cls_conn->dd_data;
spin_lock_bh(&session->lock);
int iscsi_session_get_param(struct iscsi_cls_session *cls_session,
enum iscsi_param param, char *buf)
{
- struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
- struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+ struct iscsi_session *session = cls_session->dd_data;
int len;
switch(param) {
int iscsi_host_get_param(struct Scsi_Host *shost, enum iscsi_host_param param,
char *buf)
{
- struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+ struct iscsi_host *ihost = shost_priv(shost);
int len;
switch (param) {
case ISCSI_HOST_PARAM_NETDEV_NAME:
- if (!session->netdev)
+ if (!ihost->netdev)
len = sprintf(buf, "%s\n", "default");
else
- len = sprintf(buf, "%s\n", session->netdev);
+ len = sprintf(buf, "%s\n", ihost->netdev);
break;
case ISCSI_HOST_PARAM_HWADDRESS:
- if (!session->hwaddress)
+ if (!ihost->hwaddress)
len = sprintf(buf, "%s\n", "default");
else
- len = sprintf(buf, "%s\n", session->hwaddress);
+ len = sprintf(buf, "%s\n", ihost->hwaddress);
break;
case ISCSI_HOST_PARAM_INITIATOR_NAME:
- if (!session->initiatorname)
+ if (!ihost->initiatorname)
len = sprintf(buf, "%s\n", "unknown");
else
- len = sprintf(buf, "%s\n", session->initiatorname);
+ len = sprintf(buf, "%s\n", ihost->initiatorname);
break;
-
+ case ISCSI_HOST_PARAM_IPADDRESS:
+ if (!strlen(ihost->local_address))
+ len = sprintf(buf, "%s\n", "unknown");
+ else
+ len = sprintf(buf, "%s\n",
+ ihost->local_address);
default:
return -ENOSYS;
}
int iscsi_host_set_param(struct Scsi_Host *shost, enum iscsi_host_param param,
char *buf, int buflen)
{
- struct iscsi_session *session = iscsi_hostdata(shost->hostdata);
+ struct iscsi_host *ihost = shost_priv(shost);
switch (param) {
case ISCSI_HOST_PARAM_NETDEV_NAME:
- if (!session->netdev)
- session->netdev = kstrdup(buf, GFP_KERNEL);
+ if (!ihost->netdev)
+ ihost->netdev = kstrdup(buf, GFP_KERNEL);
break;
case ISCSI_HOST_PARAM_HWADDRESS:
- if (!session->hwaddress)
- session->hwaddress = kstrdup(buf, GFP_KERNEL);
+ if (!ihost->hwaddress)
+ ihost->hwaddress = kstrdup(buf, GFP_KERNEL);
break;
case ISCSI_HOST_PARAM_INITIATOR_NAME:
- if (!session->initiatorname)
- session->initiatorname = kstrdup(buf, GFP_KERNEL);
+ if (!ihost->initiatorname)
+ ihost->initiatorname = kstrdup(buf, GFP_KERNEL);
break;
default:
return -ENOSYS;