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path: root/drivers/scsi/libfc/fc_rport.c
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Diffstat (limited to 'drivers/scsi/libfc/fc_rport.c')
-rw-r--r--drivers/scsi/libfc/fc_rport.c1077
1 files changed, 712 insertions, 365 deletions
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 97923bb0776..589ff9aedd3 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -34,7 +34,7 @@
* The rport should never hold the rport mutex and then attempt to acquire
* either the lport or disc mutexes. The rport's mutex is considered lesser
* than both the lport's mutex and the disc mutex. Refer to fc_lport.c for
- * more comments on the heirarchy.
+ * more comments on the hierarchy.
*
* The locking strategy is similar to the lport's strategy. The lock protects
* the rport's states and is held and released by the entry points to the rport
@@ -47,9 +47,11 @@
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
+#include <linux/slab.h>
#include <linux/rcupdate.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
+#include <linux/export.h>
#include <asm/unaligned.h>
#include <scsi/libfc.h>
@@ -57,8 +59,9 @@
#include "fc_libfc.h"
-struct workqueue_struct *rport_event_queue;
+static struct workqueue_struct *rport_event_queue;
+static void fc_rport_enter_flogi(struct fc_rport_priv *);
static void fc_rport_enter_plogi(struct fc_rport_priv *);
static void fc_rport_enter_prli(struct fc_rport_priv *);
static void fc_rport_enter_rtv(struct fc_rport_priv *);
@@ -66,14 +69,10 @@ static void fc_rport_enter_ready(struct fc_rport_priv *);
static void fc_rport_enter_logo(struct fc_rport_priv *);
static void fc_rport_enter_adisc(struct fc_rport_priv *);
-static void fc_rport_recv_plogi_req(struct fc_lport *,
- struct fc_seq *, struct fc_frame *);
-static void fc_rport_recv_prli_req(struct fc_rport_priv *,
- struct fc_seq *, struct fc_frame *);
-static void fc_rport_recv_prlo_req(struct fc_rport_priv *,
- struct fc_seq *, struct fc_frame *);
-static void fc_rport_recv_logo_req(struct fc_lport *,
- struct fc_seq *, struct fc_frame *);
+static void fc_rport_recv_plogi_req(struct fc_lport *, struct fc_frame *);
+static void fc_rport_recv_prli_req(struct fc_rport_priv *, struct fc_frame *);
+static void fc_rport_recv_prlo_req(struct fc_rport_priv *, struct fc_frame *);
+static void fc_rport_recv_logo_req(struct fc_lport *, struct fc_frame *);
static void fc_rport_timeout(struct work_struct *);
static void fc_rport_error(struct fc_rport_priv *, struct fc_frame *);
static void fc_rport_error_retry(struct fc_rport_priv *, struct fc_frame *);
@@ -81,27 +80,29 @@ static void fc_rport_work(struct work_struct *);
static const char *fc_rport_state_names[] = {
[RPORT_ST_INIT] = "Init",
+ [RPORT_ST_FLOGI] = "FLOGI",
+ [RPORT_ST_PLOGI_WAIT] = "PLOGI_WAIT",
[RPORT_ST_PLOGI] = "PLOGI",
[RPORT_ST_PRLI] = "PRLI",
[RPORT_ST_RTV] = "RTV",
[RPORT_ST_READY] = "Ready",
- [RPORT_ST_LOGO] = "LOGO",
[RPORT_ST_ADISC] = "ADISC",
[RPORT_ST_DELETE] = "Delete",
- [RPORT_ST_RESTART] = "Restart",
};
/**
* fc_rport_lookup() - Lookup a remote port by port_id
* @lport: The local port to lookup the remote port on
* @port_id: The remote port ID to look up
+ *
+ * The caller must hold either disc_mutex or rcu_read_lock().
*/
static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport,
u32 port_id)
{
struct fc_rport_priv *rdata;
- list_for_each_entry(rdata, &lport->disc.rports, peers)
+ list_for_each_entry_rcu(rdata, &lport->disc.rports, peers)
if (rdata->ids.port_id == port_id)
return rdata;
return NULL;
@@ -125,7 +126,7 @@ static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport,
if (rdata)
return rdata;
- rdata = kzalloc(sizeof(*rdata), GFP_KERNEL);
+ rdata = kzalloc(sizeof(*rdata) + lport->rport_priv_size, GFP_KERNEL);
if (!rdata)
return NULL;
@@ -145,8 +146,10 @@ static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport,
rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout);
INIT_WORK(&rdata->event_work, fc_rport_work);
- if (port_id != FC_FID_DIR_SERV)
- list_add(&rdata->peers, &lport->disc.rports);
+ if (port_id != FC_FID_DIR_SERV) {
+ rdata->lld_event_callback = lport->tt.rport_event_callback;
+ list_add_rcu(&rdata->peers, &lport->disc.rports);
+ }
return rdata;
}
@@ -159,7 +162,7 @@ static void fc_rport_destroy(struct kref *kref)
struct fc_rport_priv *rdata;
rdata = container_of(kref, struct fc_rport_priv, kref);
- kfree(rdata);
+ kfree_rcu(rdata, rcu);
}
/**
@@ -184,16 +187,16 @@ static const char *fc_rport_state(struct fc_rport_priv *rdata)
void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
{
if (timeout)
- rport->dev_loss_tmo = timeout + 5;
+ rport->dev_loss_tmo = timeout;
else
- rport->dev_loss_tmo = 30;
+ rport->dev_loss_tmo = 1;
}
EXPORT_SYMBOL(fc_set_rport_loss_tmo);
/**
* fc_plogi_get_maxframe() - Get the maximum payload from the common service
* parameters in a FLOGI frame
- * @flp: The FLOGI payload
+ * @flp: The FLOGI or PLOGI payload
* @maxval: The maximum frame size upper limit; this may be less than what
* is in the service parameters
*/
@@ -245,7 +248,8 @@ static void fc_rport_work(struct work_struct *work)
struct fc_rport_operations *rport_ops;
struct fc_rport_identifiers ids;
struct fc_rport *rport;
- int restart = 0;
+ struct fc4_prov *prov;
+ u8 type;
mutex_lock(&rdata->rp_mutex);
event = rdata->event;
@@ -258,6 +262,7 @@ static void fc_rport_work(struct work_struct *work)
case RPORT_EV_READY:
ids = rdata->ids;
rdata->event = RPORT_EV_NONE;
+ rdata->major_retries = 0;
kref_get(&rdata->kref);
mutex_unlock(&rdata->rp_mutex);
@@ -288,37 +293,36 @@ static void fc_rport_work(struct work_struct *work)
FC_RPORT_DBG(rdata, "callback ev %d\n", event);
rport_ops->event_callback(lport, rdata, event);
}
+ if (rdata->lld_event_callback) {
+ FC_RPORT_DBG(rdata, "lld callback ev %d\n", event);
+ rdata->lld_event_callback(lport, rdata, event);
+ }
kref_put(&rdata->kref, lport->tt.rport_destroy);
break;
case RPORT_EV_FAILED:
case RPORT_EV_LOGO:
case RPORT_EV_STOP:
+ if (rdata->prli_count) {
+ mutex_lock(&fc_prov_mutex);
+ for (type = 1; type < FC_FC4_PROV_SIZE; type++) {
+ prov = fc_passive_prov[type];
+ if (prov && prov->prlo)
+ prov->prlo(rdata);
+ }
+ mutex_unlock(&fc_prov_mutex);
+ }
port_id = rdata->ids.port_id;
mutex_unlock(&rdata->rp_mutex);
- if (port_id != FC_FID_DIR_SERV) {
- /*
- * We must drop rp_mutex before taking disc_mutex.
- * Re-evaluate state to allow for restart.
- * A transition to RESTART state must only happen
- * while disc_mutex is held and rdata is on the list.
- */
- mutex_lock(&lport->disc.disc_mutex);
- mutex_lock(&rdata->rp_mutex);
- if (rdata->rp_state == RPORT_ST_RESTART)
- restart = 1;
- else
- list_del(&rdata->peers);
- rdata->event = RPORT_EV_NONE;
- mutex_unlock(&rdata->rp_mutex);
- mutex_unlock(&lport->disc.disc_mutex);
- }
-
if (rport_ops && rport_ops->event_callback) {
FC_RPORT_DBG(rdata, "callback ev %d\n", event);
rport_ops->event_callback(lport, rdata, event);
}
+ if (rdata->lld_event_callback) {
+ FC_RPORT_DBG(rdata, "lld callback ev %d\n", event);
+ rdata->lld_event_callback(lport, rdata, event);
+ }
cancel_delayed_work_sync(&rdata->retry_work);
/*
@@ -335,13 +339,38 @@ static void fc_rport_work(struct work_struct *work)
mutex_unlock(&rdata->rp_mutex);
fc_remote_port_delete(rport);
}
- if (restart) {
- mutex_lock(&rdata->rp_mutex);
- FC_RPORT_DBG(rdata, "work restart\n");
- fc_rport_enter_plogi(rdata);
+
+ mutex_lock(&lport->disc.disc_mutex);
+ mutex_lock(&rdata->rp_mutex);
+ if (rdata->rp_state == RPORT_ST_DELETE) {
+ if (port_id == FC_FID_DIR_SERV) {
+ rdata->event = RPORT_EV_NONE;
+ mutex_unlock(&rdata->rp_mutex);
+ kref_put(&rdata->kref, lport->tt.rport_destroy);
+ } else if ((rdata->flags & FC_RP_STARTED) &&
+ rdata->major_retries <
+ lport->max_rport_retry_count) {
+ rdata->major_retries++;
+ rdata->event = RPORT_EV_NONE;
+ FC_RPORT_DBG(rdata, "work restart\n");
+ fc_rport_enter_flogi(rdata);
+ mutex_unlock(&rdata->rp_mutex);
+ } else {
+ FC_RPORT_DBG(rdata, "work delete\n");
+ list_del_rcu(&rdata->peers);
+ mutex_unlock(&rdata->rp_mutex);
+ kref_put(&rdata->kref, lport->tt.rport_destroy);
+ }
+ } else {
+ /*
+ * Re-open for events. Reissue READY event if ready.
+ */
+ rdata->event = RPORT_EV_NONE;
+ if (rdata->rp_state == RPORT_ST_READY)
+ fc_rport_enter_ready(rdata);
mutex_unlock(&rdata->rp_mutex);
- } else
- kref_put(&rdata->kref, lport->tt.rport_destroy);
+ }
+ mutex_unlock(&lport->disc.disc_mutex);
break;
default:
@@ -362,24 +391,22 @@ static void fc_rport_work(struct work_struct *work)
* If it appears we are already logged in, ADISC is used to verify
* the setup.
*/
-int fc_rport_login(struct fc_rport_priv *rdata)
+static int fc_rport_login(struct fc_rport_priv *rdata)
{
mutex_lock(&rdata->rp_mutex);
+ rdata->flags |= FC_RP_STARTED;
switch (rdata->rp_state) {
case RPORT_ST_READY:
FC_RPORT_DBG(rdata, "ADISC port\n");
fc_rport_enter_adisc(rdata);
break;
- case RPORT_ST_RESTART:
- break;
case RPORT_ST_DELETE:
FC_RPORT_DBG(rdata, "Restart deleted port\n");
- fc_rport_state_enter(rdata, RPORT_ST_RESTART);
break;
default:
FC_RPORT_DBG(rdata, "Login to port\n");
- fc_rport_enter_plogi(rdata);
+ fc_rport_enter_flogi(rdata);
break;
}
mutex_unlock(&rdata->rp_mutex);
@@ -424,21 +451,18 @@ static void fc_rport_enter_delete(struct fc_rport_priv *rdata,
* function will hold the rport lock, call an _enter_*
* function and then unlock the rport.
*/
-int fc_rport_logoff(struct fc_rport_priv *rdata)
+static int fc_rport_logoff(struct fc_rport_priv *rdata)
{
mutex_lock(&rdata->rp_mutex);
FC_RPORT_DBG(rdata, "Remove port\n");
+ rdata->flags &= ~FC_RP_STARTED;
if (rdata->rp_state == RPORT_ST_DELETE) {
FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n");
goto out;
}
-
- if (rdata->rp_state == RPORT_ST_RESTART)
- FC_RPORT_DBG(rdata, "Port in Restart state, deleting\n");
- else
- fc_rport_enter_logo(rdata);
+ fc_rport_enter_logo(rdata);
/*
* Change the state to Delete so that we discard
@@ -484,6 +508,9 @@ static void fc_rport_timeout(struct work_struct *work)
mutex_lock(&rdata->rp_mutex);
switch (rdata->rp_state) {
+ case RPORT_ST_FLOGI:
+ fc_rport_enter_flogi(rdata);
+ break;
case RPORT_ST_PLOGI:
fc_rport_enter_plogi(rdata);
break;
@@ -493,16 +520,13 @@ static void fc_rport_timeout(struct work_struct *work)
case RPORT_ST_RTV:
fc_rport_enter_rtv(rdata);
break;
- case RPORT_ST_LOGO:
- fc_rport_enter_logo(rdata);
- break;
case RPORT_ST_ADISC:
fc_rport_enter_adisc(rdata);
break;
+ case RPORT_ST_PLOGI_WAIT:
case RPORT_ST_READY:
case RPORT_ST_INIT:
case RPORT_ST_DELETE:
- case RPORT_ST_RESTART:
break;
}
@@ -524,8 +548,9 @@ static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp)
fc_rport_state(rdata), rdata->retries);
switch (rdata->rp_state) {
+ case RPORT_ST_FLOGI:
case RPORT_ST_PLOGI:
- case RPORT_ST_LOGO:
+ rdata->flags &= ~FC_RP_STARTED;
fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
break;
case RPORT_ST_RTV:
@@ -535,8 +560,8 @@ static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp)
case RPORT_ST_ADISC:
fc_rport_enter_logo(rdata);
break;
+ case RPORT_ST_PLOGI_WAIT:
case RPORT_ST_DELETE:
- case RPORT_ST_RESTART:
case RPORT_ST_READY:
case RPORT_ST_INIT:
break;
@@ -557,11 +582,11 @@ static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp)
static void fc_rport_error_retry(struct fc_rport_priv *rdata,
struct fc_frame *fp)
{
- unsigned long delay = FC_DEF_E_D_TOV;
+ unsigned long delay = msecs_to_jiffies(FC_DEF_E_D_TOV);
/* make sure this isn't an FC_EX_CLOSED error, never retry those */
if (PTR_ERR(fp) == -FC_EX_CLOSED)
- return fc_rport_error(rdata, fp);
+ goto out;
if (rdata->retries < rdata->local_port->max_rport_retry_count) {
FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n",
@@ -574,11 +599,270 @@ static void fc_rport_error_retry(struct fc_rport_priv *rdata,
return;
}
- return fc_rport_error(rdata, fp);
+out:
+ fc_rport_error(rdata, fp);
+}
+
+/**
+ * fc_rport_login_complete() - Handle parameters and completion of p-mp login.
+ * @rdata: The remote port which we logged into or which logged into us.
+ * @fp: The FLOGI or PLOGI request or response frame
+ *
+ * Returns non-zero error if a problem is detected with the frame.
+ * Does not free the frame.
+ *
+ * This is only used in point-to-multipoint mode for FIP currently.
+ */
+static int fc_rport_login_complete(struct fc_rport_priv *rdata,
+ struct fc_frame *fp)
+{
+ struct fc_lport *lport = rdata->local_port;
+ struct fc_els_flogi *flogi;
+ unsigned int e_d_tov;
+ u16 csp_flags;
+
+ flogi = fc_frame_payload_get(fp, sizeof(*flogi));
+ if (!flogi)
+ return -EINVAL;
+
+ csp_flags = ntohs(flogi->fl_csp.sp_features);
+
+ if (fc_frame_payload_op(fp) == ELS_FLOGI) {
+ if (csp_flags & FC_SP_FT_FPORT) {
+ FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n");
+ return -EINVAL;
+ }
+ } else {
+
+ /*
+ * E_D_TOV is not valid on an incoming FLOGI request.
+ */
+ e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov);
+ if (csp_flags & FC_SP_FT_EDTR)
+ e_d_tov /= 1000000;
+ if (e_d_tov > rdata->e_d_tov)
+ rdata->e_d_tov = e_d_tov;
+ }
+ rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs);
+ return 0;
+}
+
+/**
+ * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode
+ * @sp: The sequence that the FLOGI was on
+ * @fp: The FLOGI response frame
+ * @rp_arg: The remote port that received the FLOGI response
+ */
+static void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
+ void *rp_arg)
+{
+ struct fc_rport_priv *rdata = rp_arg;
+ struct fc_lport *lport = rdata->local_port;
+ struct fc_els_flogi *flogi;
+ unsigned int r_a_tov;
+
+ FC_RPORT_DBG(rdata, "Received a FLOGI %s\n", fc_els_resp_type(fp));
+
+ if (fp == ERR_PTR(-FC_EX_CLOSED))
+ goto put;
+
+ mutex_lock(&rdata->rp_mutex);
+
+ if (rdata->rp_state != RPORT_ST_FLOGI) {
+ FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state "
+ "%s\n", fc_rport_state(rdata));
+ if (IS_ERR(fp))
+ goto err;
+ goto out;
+ }
+
+ if (IS_ERR(fp)) {
+ fc_rport_error(rdata, fp);
+ goto err;
+ }
+
+ if (fc_frame_payload_op(fp) != ELS_LS_ACC)
+ goto bad;
+ if (fc_rport_login_complete(rdata, fp))
+ goto bad;
+
+ flogi = fc_frame_payload_get(fp, sizeof(*flogi));
+ if (!flogi)
+ goto bad;
+ r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov);
+ if (r_a_tov > rdata->r_a_tov)
+ rdata->r_a_tov = r_a_tov;
+
+ if (rdata->ids.port_name < lport->wwpn)
+ fc_rport_enter_plogi(rdata);
+ else
+ fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
+out:
+ fc_frame_free(fp);
+err:
+ mutex_unlock(&rdata->rp_mutex);
+put:
+ kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
+ return;
+bad:
+ FC_RPORT_DBG(rdata, "Bad FLOGI response\n");
+ fc_rport_error_retry(rdata, fp);
+ goto out;
+}
+
+/**
+ * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp
+ * @rdata: The remote port to send a FLOGI to
+ *
+ * Locking Note: The rport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_rport_enter_flogi(struct fc_rport_priv *rdata)
+{
+ struct fc_lport *lport = rdata->local_port;
+ struct fc_frame *fp;
+
+ if (!lport->point_to_multipoint)
+ return fc_rport_enter_plogi(rdata);
+
+ FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n",
+ fc_rport_state(rdata));
+
+ fc_rport_state_enter(rdata, RPORT_ST_FLOGI);
+
+ fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
+ if (!fp)
+ return fc_rport_error_retry(rdata, fp);
+
+ if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI,
+ fc_rport_flogi_resp, rdata,
+ 2 * lport->r_a_tov))
+ fc_rport_error_retry(rdata, NULL);
+ else
+ kref_get(&rdata->kref);
+}
+
+/**
+ * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode
+ * @lport: The local port that received the PLOGI request
+ * @rx_fp: The PLOGI request frame
+ */
+static void fc_rport_recv_flogi_req(struct fc_lport *lport,
+ struct fc_frame *rx_fp)
+{
+ struct fc_disc *disc;
+ struct fc_els_flogi *flp;
+ struct fc_rport_priv *rdata;
+ struct fc_frame *fp = rx_fp;
+ struct fc_seq_els_data rjt_data;
+ u32 sid;
+
+ sid = fc_frame_sid(fp);
+
+ FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n");
+
+ disc = &lport->disc;
+ mutex_lock(&disc->disc_mutex);
+
+ if (!lport->point_to_multipoint) {
+ rjt_data.reason = ELS_RJT_UNSUP;
+ rjt_data.explan = ELS_EXPL_NONE;
+ goto reject;
+ }
+
+ flp = fc_frame_payload_get(fp, sizeof(*flp));
+ if (!flp) {
+ rjt_data.reason = ELS_RJT_LOGIC;
+ rjt_data.explan = ELS_EXPL_INV_LEN;
+ goto reject;
+ }
+
+ rdata = lport->tt.rport_lookup(lport, sid);
+ if (!rdata) {
+ rjt_data.reason = ELS_RJT_FIP;
+ rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR;
+ goto reject;
+ }
+ mutex_lock(&rdata->rp_mutex);
+
+ FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n",
+ fc_rport_state(rdata));
+
+ switch (rdata->rp_state) {
+ case RPORT_ST_INIT:
+ /*
+ * If received the FLOGI request on RPORT which is INIT state
+ * (means not transition to FLOGI either fc_rport timeout
+ * function didn;t trigger or this end hasn;t received
+ * beacon yet from other end. In that case only, allow RPORT
+ * state machine to continue, otherwise fall through which
+ * causes the code to send reject response.
+ * NOTE; Not checking for FIP->state such as VNMP_UP or
+ * VNMP_CLAIM because if FIP state is not one of those,
+ * RPORT wouldn;t have created and 'rport_lookup' would have
+ * failed anyway in that case.
+ */
+ if (lport->point_to_multipoint)
+ break;
+ case RPORT_ST_DELETE:
+ mutex_unlock(&rdata->rp_mutex);
+ rjt_data.reason = ELS_RJT_FIP;
+ rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR;
+ goto reject;
+ case RPORT_ST_FLOGI:
+ case RPORT_ST_PLOGI_WAIT:
+ case RPORT_ST_PLOGI:
+ break;
+ case RPORT_ST_PRLI:
+ case RPORT_ST_RTV:
+ case RPORT_ST_READY:
+ case RPORT_ST_ADISC:
+ /*
+ * Set the remote port to be deleted and to then restart.
+ * This queues work to be sure exchanges are reset.
+ */
+ fc_rport_enter_delete(rdata, RPORT_EV_LOGO);
+ mutex_unlock(&rdata->rp_mutex);
+ rjt_data.reason = ELS_RJT_BUSY;
+ rjt_data.explan = ELS_EXPL_NONE;
+ goto reject;
+ }
+ if (fc_rport_login_complete(rdata, fp)) {
+ mutex_unlock(&rdata->rp_mutex);
+ rjt_data.reason = ELS_RJT_LOGIC;
+ rjt_data.explan = ELS_EXPL_NONE;
+ goto reject;
+ }
+
+ fp = fc_frame_alloc(lport, sizeof(*flp));
+ if (!fp)
+ goto out;
+
+ fc_flogi_fill(lport, fp);
+ flp = fc_frame_payload_get(fp, sizeof(*flp));
+ flp->fl_cmd = ELS_LS_ACC;
+
+ fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
+ lport->tt.frame_send(lport, fp);
+
+ if (rdata->ids.port_name < lport->wwpn)
+ fc_rport_enter_plogi(rdata);
+ else
+ fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
+out:
+ mutex_unlock(&rdata->rp_mutex);
+ mutex_unlock(&disc->disc_mutex);
+ fc_frame_free(rx_fp);
+ return;
+
+reject:
+ mutex_unlock(&disc->disc_mutex);
+ lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
+ fc_frame_free(rx_fp);
}
/**
- * fc_rport_plogi_recv_resp() - Handler for ELS PLOGI responses
+ * fc_rport_plogi_resp() - Handler for ELS PLOGI responses
* @sp: The sequence the PLOGI is on
* @fp: The PLOGI response frame
* @rdata_arg: The remote port that sent the PLOGI response
@@ -593,7 +877,6 @@ static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
struct fc_rport_priv *rdata = rdata_arg;
struct fc_lport *lport = rdata->local_port;
struct fc_els_flogi *plp = NULL;
- unsigned int tov;
u16 csp_seq;
u16 cssp_seq;
u8 op;
@@ -621,11 +904,11 @@ static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn);
rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn);
- tov = ntohl(plp->fl_csp.sp_e_d_tov);
- if (ntohs(plp->fl_csp.sp_features) & FC_SP_FT_EDTR)
- tov /= 1000000;
- if (tov > rdata->e_d_tov)
- rdata->e_d_tov = tov;
+ /* save plogi response sp_features for further reference */
+ rdata->sp_features = ntohs(plp->fl_csp.sp_features);
+
+ if (lport->point_to_multipoint)
+ fc_rport_login_complete(rdata, fp);
csp_seq = ntohs(plp->fl_csp.sp_tot_seq);
cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq);
if (cssp_seq < csp_seq)
@@ -643,6 +926,20 @@ err:
kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
}
+static bool
+fc_rport_compatible_roles(struct fc_lport *lport, struct fc_rport_priv *rdata)
+{
+ if (rdata->ids.roles == FC_PORT_ROLE_UNKNOWN)
+ return true;
+ if ((rdata->ids.roles & FC_PORT_ROLE_FCP_TARGET) &&
+ (lport->service_params & FCP_SPPF_INIT_FCN))
+ return true;
+ if ((rdata->ids.roles & FC_PORT_ROLE_FCP_INITIATOR) &&
+ (lport->service_params & FCP_SPPF_TARG_FCN))
+ return true;
+ return false;
+}
+
/**
* fc_rport_enter_plogi() - Send Port Login (PLOGI) request
* @rdata: The remote port to send a PLOGI to
@@ -655,6 +952,12 @@ static void fc_rport_enter_plogi(struct fc_rport_priv *rdata)
struct fc_lport *lport = rdata->local_port;
struct fc_frame *fp;
+ if (!fc_rport_compatible_roles(lport, rdata)) {
+ FC_RPORT_DBG(rdata, "PLOGI suppressed for incompatible role\n");
+ fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
+ return;
+ }
+
FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n",
fc_rport_state(rdata));
@@ -663,6 +966,7 @@ static void fc_rport_enter_plogi(struct fc_rport_priv *rdata)
rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
if (!fp) {
+ FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__);
fc_rport_error_retry(rdata, fp);
return;
}
@@ -694,9 +998,12 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
struct fc_els_prli prli;
struct fc_els_spp spp;
} *pp;
+ struct fc_els_spp temp_spp;
+ struct fc4_prov *prov;
u32 roles = FC_RPORT_ROLE_UNKNOWN;
u32 fcp_parm = 0;
u8 op;
+ u8 resp_code = 0;
mutex_lock(&rdata->rp_mutex);
@@ -721,10 +1028,34 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
op = fc_frame_payload_op(fp);
if (op == ELS_LS_ACC) {
pp = fc_frame_payload_get(fp, sizeof(*pp));
- if (pp && pp->prli.prli_spp_len >= sizeof(pp->spp)) {
- fcp_parm = ntohl(pp->spp.spp_params);
- if (fcp_parm & FCP_SPPF_RETRY)
- rdata->flags |= FC_RP_FLAGS_RETRY;
+ if (!pp)
+ goto out;
+
+ resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK);
+ FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x\n",
+ pp->spp.spp_flags);
+ rdata->spp_type = pp->spp.spp_type;
+ if (resp_code != FC_SPP_RESP_ACK) {
+ if (resp_code == FC_SPP_RESP_CONF)
+ fc_rport_error(rdata, fp);
+ else
+ fc_rport_error_retry(rdata, fp);
+ goto out;
+ }
+ if (pp->prli.prli_spp_len < sizeof(pp->spp))
+ goto out;
+
+ fcp_parm = ntohl(pp->spp.spp_params);
+ if (fcp_parm & FCP_SPPF_RETRY)
+ rdata->flags |= FC_RP_FLAGS_RETRY;
+ if (fcp_parm & FCP_SPPF_CONF_COMPL)
+ rdata->flags |= FC_RP_FLAGS_CONF_REQ;
+
+ prov = fc_passive_prov[FC_TYPE_FCP];
+ if (prov) {
+ memset(&temp_spp, 0, sizeof(temp_spp));
+ prov->prli(rdata, pp->prli.prli_spp_len,
+ &pp->spp, &temp_spp);
}
rdata->supported_classes = FC_COS_CLASS3;
@@ -738,55 +1069,9 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
} else {
FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n");
- fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
- }
-
-out:
- fc_frame_free(fp);
-err:
- mutex_unlock(&rdata->rp_mutex);
- kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
-}
-
-/**
- * fc_rport_logo_resp() - Handler for logout (LOGO) responses
- * @sp: The sequence the LOGO was on
- * @fp: The LOGO response frame
- * @rdata_arg: The remote port that sent the LOGO response
- *
- * Locking Note: This function will be called without the rport lock
- * held, but it will lock, call an _enter_* function or fc_rport_error
- * and then unlock the rport.
- */
-static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
- void *rdata_arg)
-{
- struct fc_rport_priv *rdata = rdata_arg;
- u8 op;
-
- mutex_lock(&rdata->rp_mutex);
-
- FC_RPORT_DBG(rdata, "Received a LOGO %s\n", fc_els_resp_type(fp));
-
- if (rdata->rp_state != RPORT_ST_LOGO) {
- FC_RPORT_DBG(rdata, "Received a LOGO response, but in state "
- "%s\n", fc_rport_state(rdata));
- if (IS_ERR(fp))
- goto err;
- goto out;
- }
-
- if (IS_ERR(fp)) {
fc_rport_error_retry(rdata, fp);
- goto err;
}
- op = fc_frame_payload_op(fp);
- if (op != ELS_LS_ACC)
- FC_RPORT_DBG(rdata, "Bad ELS response op %x for LOGO command\n",
- op);
- fc_rport_enter_delete(rdata, RPORT_EV_LOGO);
-
out:
fc_frame_free(fp);
err:
@@ -809,6 +1094,7 @@ static void fc_rport_enter_prli(struct fc_rport_priv *rdata)
struct fc_els_spp spp;
} *pp;
struct fc_frame *fp;
+ struct fc4_prov *prov;
/*
* If the rport is one of the well known addresses
@@ -830,9 +1116,20 @@ static void fc_rport_enter_prli(struct fc_rport_priv *rdata)
return;
}
- if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PRLI,
- fc_rport_prli_resp, rdata,
- 2 * lport->r_a_tov))
+ fc_prli_fill(lport, fp);
+
+ prov = fc_passive_prov[FC_TYPE_FCP];
+ if (prov) {
+ pp = fc_frame_payload_get(fp, sizeof(*pp));
+ prov->prli(rdata, sizeof(pp->spp), NULL, &pp->spp);
+ }
+
+ fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rdata->ids.port_id,
+ fc_host_port_id(lport->host), FC_TYPE_ELS,
+ FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
+
+ if (!lport->tt.exch_seq_send(lport, fp, fc_rport_prli_resp,
+ NULL, rdata, 2 * lport->r_a_tov))
fc_rport_error_retry(rdata, NULL);
else
kref_get(&rdata->kref);
@@ -936,6 +1233,24 @@ static void fc_rport_enter_rtv(struct fc_rport_priv *rdata)
}
/**
+ * fc_rport_logo_resp() - Handler for logout (LOGO) responses
+ * @sp: The sequence the LOGO was on
+ * @fp: The LOGO response frame
+ * @lport_arg: The local port
+ */
+static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
+ void *lport_arg)
+{
+ struct fc_lport *lport = lport_arg;
+
+ FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did,
+ "Received a LOGO %s\n", fc_els_resp_type(fp));
+ if (IS_ERR(fp))
+ return;
+ fc_frame_free(fp);
+}
+
+/**
* fc_rport_enter_logo() - Send a logout (LOGO) request
* @rdata: The remote port to send the LOGO request to
*
@@ -947,23 +1262,14 @@ static void fc_rport_enter_logo(struct fc_rport_priv *rdata)
struct fc_lport *lport = rdata->local_port;
struct fc_frame *fp;
- FC_RPORT_DBG(rdata, "Port entered LOGO state from %s state\n",
+ FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n",
fc_rport_state(rdata));
- fc_rport_state_enter(rdata, RPORT_ST_LOGO);
-
fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo));
- if (!fp) {
- fc_rport_error_retry(rdata, fp);
+ if (!fp)
return;
- }
-
- if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO,
- fc_rport_logo_resp, rdata,
- 2 * lport->r_a_tov))
- fc_rport_error_retry(rdata, NULL);
- else
- kref_get(&rdata->kref);
+ (void)lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO,
+ fc_rport_logo_resp, lport, 0);
}
/**
@@ -1012,7 +1318,7 @@ static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp,
get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name ||
get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) {
FC_RPORT_DBG(rdata, "ADISC error or mismatch\n");
- fc_rport_enter_plogi(rdata);
+ fc_rport_enter_flogi(rdata);
} else {
FC_RPORT_DBG(rdata, "ADISC OK\n");
fc_rport_enter_ready(rdata);
@@ -1057,29 +1363,25 @@ static void fc_rport_enter_adisc(struct fc_rport_priv *rdata)
/**
* fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests
* @rdata: The remote port that sent the ADISC request
- * @sp: The sequence the ADISC request was on
* @in_fp: The ADISC request frame
*
* Locking Note: Called with the lport and rport locks held.
*/
static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata,
- struct fc_seq *sp, struct fc_frame *in_fp)
+ struct fc_frame *in_fp)
{
struct fc_lport *lport = rdata->local_port;
struct fc_frame *fp;
- struct fc_exch *ep = fc_seq_exch(sp);
struct fc_els_adisc *adisc;
struct fc_seq_els_data rjt_data;
- u32 f_ctl;
FC_RPORT_DBG(rdata, "Received ADISC request\n");
adisc = fc_frame_payload_get(in_fp, sizeof(*adisc));
if (!adisc) {
- rjt_data.fp = NULL;
rjt_data.reason = ELS_RJT_PROT;
rjt_data.explan = ELS_EXPL_INV_LEN;
- lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
+ lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
goto drop;
}
@@ -1089,11 +1391,8 @@ static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata,
fc_adisc_fill(lport, fp);
adisc = fc_frame_payload_get(fp, sizeof(*adisc));
adisc->adisc_cmd = ELS_LS_ACC;
- sp = lport->tt.seq_start_next(sp);
- f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT;
- fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
- FC_TYPE_ELS, f_ctl, 0);
- lport->tt.seq_send(lport, sp, fp);
+ fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
+ lport->tt.frame_send(lport, fp);
drop:
fc_frame_free(in_fp);
}
@@ -1101,25 +1400,22 @@ drop:
/**
* fc_rport_recv_rls_req() - Handle received Read Link Status request
* @rdata: The remote port that sent the RLS request
- * @sp: The sequence that the RLS was on
* @rx_fp: The PRLI request frame
*
* Locking Note: The rport lock is expected to be held before calling
* this function.
*/
static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata,
- struct fc_seq *sp, struct fc_frame *rx_fp)
+ struct fc_frame *rx_fp)
{
struct fc_lport *lport = rdata->local_port;
struct fc_frame *fp;
- struct fc_exch *ep = fc_seq_exch(sp);
struct fc_els_rls *rls;
struct fc_els_rls_resp *rsp;
struct fc_els_lesb *lesb;
struct fc_seq_els_data rjt_data;
struct fc_host_statistics *hst;
- u32 f_ctl;
FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n",
fc_rport_state(rdata));
@@ -1156,16 +1452,12 @@ static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata,
lesb->lesb_inv_crc = htonl(hst->invalid_crc_count);
}
- sp = lport->tt.seq_start_next(sp);
- f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
- fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
- FC_TYPE_ELS, f_ctl, 0);
- lport->tt.seq_send(lport, sp, fp);
+ fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
+ lport->tt.frame_send(lport, fp);
goto out;
out_rjt:
- rjt_data.fp = NULL;
- lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
+ lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
out:
fc_frame_free(rx_fp);
}
@@ -1173,7 +1465,6 @@ out:
/**
* fc_rport_recv_els_req() - Handler for validated ELS requests
* @lport: The local port that received the ELS request
- * @sp: The sequence that the ELS request was on
* @fp: The ELS request frame
*
* Handle incoming ELS requests that require port login.
@@ -1181,21 +1472,13 @@ out:
*
* Locking Note: Called with the lport lock held.
*/
-static void fc_rport_recv_els_req(struct fc_lport *lport,
- struct fc_seq *sp, struct fc_frame *fp)
+static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp)
{
struct fc_rport_priv *rdata;
- struct fc_frame_header *fh;
struct fc_seq_els_data els_data;
- els_data.fp = NULL;
- els_data.reason = ELS_RJT_UNAB;
- els_data.explan = ELS_EXPL_PLOGI_REQD;
-
- fh = fc_frame_header_get(fp);
-
mutex_lock(&lport->disc.disc_mutex);
- rdata = lport->tt.rport_lookup(lport, ntoh24(fh->fh_s_id));
+ rdata = lport->tt.rport_lookup(lport, fc_frame_sid(fp));
if (!rdata) {
mutex_unlock(&lport->disc.disc_mutex);
goto reject;
@@ -1216,24 +1499,24 @@ static void fc_rport_recv_els_req(struct fc_lport *lport,
switch (fc_frame_payload_op(fp)) {
case ELS_PRLI:
- fc_rport_recv_prli_req(rdata, sp, fp);
+ fc_rport_recv_prli_req(rdata, fp);
break;
case ELS_PRLO:
- fc_rport_recv_prlo_req(rdata, sp, fp);
+ fc_rport_recv_prlo_req(rdata, fp);
break;
case ELS_ADISC:
- fc_rport_recv_adisc_req(rdata, sp, fp);
+ fc_rport_recv_adisc_req(rdata, fp);
break;
case ELS_RRQ:
- els_data.fp = fp;
- lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data);
+ lport->tt.seq_els_rsp_send(fp, ELS_RRQ, NULL);
+ fc_frame_free(fp);
break;
case ELS_REC:
- els_data.fp = fp;
- lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data);
+ lport->tt.seq_els_rsp_send(fp, ELS_REC, NULL);
+ fc_frame_free(fp);
break;
case ELS_RLS:
- fc_rport_recv_rls_req(rdata, sp, fp);
+ fc_rport_recv_rls_req(rdata, fp);
break;
default:
fc_frame_free(fp); /* can't happen */
@@ -1244,35 +1527,38 @@ static void fc_rport_recv_els_req(struct fc_lport *lport,
return;
reject:
- lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data);
+ els_data.reason = ELS_RJT_UNAB;
+ els_data.explan = ELS_EXPL_PLOGI_REQD;
+ lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
fc_frame_free(fp);
}
/**
* fc_rport_recv_req() - Handler for requests
- * @sp: The sequence the request was on
- * @fp: The request frame
* @lport: The local port that received the request
+ * @fp: The request frame
*
* Locking Note: Called with the lport lock held.
*/
-void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp,
- struct fc_lport *lport)
+static void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp)
{
struct fc_seq_els_data els_data;
/*
- * Handle PLOGI and LOGO requests separately, since they
+ * Handle FLOGI, PLOGI and LOGO requests separately, since they
* don't require prior login.
* Check for unsupported opcodes first and reject them.
* For some ops, it would be incorrect to reject with "PLOGI required".
*/
switch (fc_frame_payload_op(fp)) {
+ case ELS_FLOGI:
+ fc_rport_recv_flogi_req(lport, fp);
+ break;
case ELS_PLOGI:
- fc_rport_recv_plogi_req(lport, sp, fp);
+ fc_rport_recv_plogi_req(lport, fp);
break;
case ELS_LOGO:
- fc_rport_recv_logo_req(lport, sp, fp);
+ fc_rport_recv_logo_req(lport, fp);
break;
case ELS_PRLI:
case ELS_PRLO:
@@ -1280,14 +1566,13 @@ void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp,
case ELS_RRQ:
case ELS_REC:
case ELS_RLS:
- fc_rport_recv_els_req(lport, sp, fp);
+ fc_rport_recv_els_req(lport, fp);
break;
default:
- fc_frame_free(fp);
- els_data.fp = NULL;
els_data.reason = ELS_RJT_UNSUP;
els_data.explan = ELS_EXPL_NONE;
- lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data);
+ lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
+ fc_frame_free(fp);
break;
}
}
@@ -1295,26 +1580,21 @@ void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp,
/**
* fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests
* @lport: The local port that received the PLOGI request
- * @sp: The sequence that the PLOGI request was on
* @rx_fp: The PLOGI request frame
*
* Locking Note: The rport lock is held before calling this function.
*/
static void fc_rport_recv_plogi_req(struct fc_lport *lport,
- struct fc_seq *sp, struct fc_frame *rx_fp)
+ struct fc_frame *rx_fp)
{
struct fc_disc *disc;
struct fc_rport_priv *rdata;
struct fc_frame *fp = rx_fp;
- struct fc_exch *ep;
- struct fc_frame_header *fh;
struct fc_els_flogi *pl;
struct fc_seq_els_data rjt_data;
- u32 sid, f_ctl;
+ u32 sid;
- rjt_data.fp = NULL;
- fh = fc_frame_header_get(fp);
- sid = ntoh24(fh->fh_s_id);
+ sid = fc_frame_sid(fp);
FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n");
@@ -1357,6 +1637,9 @@ static void fc_rport_recv_plogi_req(struct fc_lport *lport,
case RPORT_ST_INIT:
FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n");
break;
+ case RPORT_ST_PLOGI_WAIT:
+ FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n");
+ break;
case RPORT_ST_PLOGI:
FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n");
if (rdata->ids.port_name < lport->wwpn) {
@@ -1374,9 +1657,8 @@ static void fc_rport_recv_plogi_req(struct fc_lport *lport,
"- ignored for now\n", rdata->rp_state);
/* XXX TBD - should reset */
break;
+ case RPORT_ST_FLOGI:
case RPORT_ST_DELETE:
- case RPORT_ST_LOGO:
- case RPORT_ST_RESTART:
FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n",
fc_rport_state(rdata));
mutex_unlock(&rdata->rp_mutex);
@@ -1384,55 +1666,53 @@ static void fc_rport_recv_plogi_req(struct fc_lport *lport,
rjt_data.explan = ELS_EXPL_NONE;
goto reject;
}
+ if (!fc_rport_compatible_roles(lport, rdata)) {
+ FC_RPORT_DBG(rdata, "Received PLOGI for incompatible role\n");
+ mutex_unlock(&rdata->rp_mutex);
+ rjt_data.reason = ELS_RJT_LOGIC;
+ rjt_data.explan = ELS_EXPL_NONE;
+ goto reject;
+ }
/*
* Get session payload size from incoming PLOGI.
*/
rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs);
- fc_frame_free(rx_fp);
/*
* Send LS_ACC. If this fails, the originator should retry.
*/
- sp = lport->tt.seq_start_next(sp);
- if (!sp)
- goto out;
fp = fc_frame_alloc(lport, sizeof(*pl));
if (!fp)
goto out;
fc_plogi_fill(lport, fp, ELS_LS_ACC);
- f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT;
- ep = fc_seq_exch(sp);
- fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
- FC_TYPE_ELS, f_ctl, 0);
- lport->tt.seq_send(lport, sp, fp);
+ fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
+ lport->tt.frame_send(lport, fp);
fc_rport_enter_prli(rdata);
out:
mutex_unlock(&rdata->rp_mutex);
+ fc_frame_free(rx_fp);
return;
reject:
- lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
+ lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
fc_frame_free(fp);
}
/**
* fc_rport_recv_prli_req() - Handler for process login (PRLI) requests
* @rdata: The remote port that sent the PRLI request
- * @sp: The sequence that the PRLI was on
* @rx_fp: The PRLI request frame
*
- * Locking Note: The rport lock is exected to be held before calling
+ * Locking Note: The rport lock is expected to be held before calling
* this function.
*/
static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata,
- struct fc_seq *sp, struct fc_frame *rx_fp)
+ struct fc_frame *rx_fp)
{
struct fc_lport *lport = rdata->local_port;
- struct fc_exch *ep;
struct fc_frame *fp;
- struct fc_frame_header *fh;
struct {
struct fc_els_prli prli;
struct fc_els_spp spp;
@@ -1441,190 +1721,191 @@ static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata,
struct fc_els_spp *spp; /* response spp */
unsigned int len;
unsigned int plen;
- enum fc_els_rjt_reason reason = ELS_RJT_UNAB;
- enum fc_els_rjt_explan explan = ELS_EXPL_NONE;
enum fc_els_spp_resp resp;
+ enum fc_els_spp_resp passive;
struct fc_seq_els_data rjt_data;
- u32 f_ctl;
- u32 fcp_parm;
- u32 roles = FC_RPORT_ROLE_UNKNOWN;
- rjt_data.fp = NULL;
-
- fh = fc_frame_header_get(rx_fp);
+ struct fc4_prov *prov;
FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n",
fc_rport_state(rdata));
- switch (rdata->rp_state) {
- case RPORT_ST_PRLI:
- case RPORT_ST_RTV:
- case RPORT_ST_READY:
- case RPORT_ST_ADISC:
- reason = ELS_RJT_NONE;
- break;
- default:
- fc_frame_free(rx_fp);
- return;
- break;
- }
- len = fr_len(rx_fp) - sizeof(*fh);
+ len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
- if (pp == NULL) {
- reason = ELS_RJT_PROT;
- explan = ELS_EXPL_INV_LEN;
- } else {
- plen = ntohs(pp->prli.prli_len);
- if ((plen % 4) != 0 || plen > len) {
- reason = ELS_RJT_PROT;
- explan = ELS_EXPL_INV_LEN;
- } else if (plen < len) {
- len = plen;
- }
- plen = pp->prli.prli_spp_len;
- if ((plen % 4) != 0 || plen < sizeof(*spp) ||
- plen > len || len < sizeof(*pp)) {
- reason = ELS_RJT_PROT;
- explan = ELS_EXPL_INV_LEN;
- }
- rspp = &pp->spp;
+ if (!pp)
+ goto reject_len;
+ plen = ntohs(pp->prli.prli_len);
+ if ((plen % 4) != 0 || plen > len || plen < 16)
+ goto reject_len;
+ if (plen < len)
+ len = plen;
+ plen = pp->prli.prli_spp_len;
+ if ((plen % 4) != 0 || plen < sizeof(*spp) ||
+ plen > len || len < sizeof(*pp) || plen < 12)
+ goto reject_len;
+ rspp = &pp->spp;
+
+ fp = fc_frame_alloc(lport, len);
+ if (!fp) {
+ rjt_data.reason = ELS_RJT_UNAB;
+ rjt_data.explan = ELS_EXPL_INSUF_RES;
+ goto reject;
}
- if (reason != ELS_RJT_NONE ||
- (fp = fc_frame_alloc(lport, len)) == NULL) {
- rjt_data.reason = reason;
- rjt_data.explan = explan;
- lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
- } else {
- sp = lport->tt.seq_start_next(sp);
- WARN_ON(!sp);
- pp = fc_frame_payload_get(fp, len);
- WARN_ON(!pp);
- memset(pp, 0, len);
- pp->prli.prli_cmd = ELS_LS_ACC;
- pp->prli.prli_spp_len = plen;
- pp->prli.prli_len = htons(len);
- len -= sizeof(struct fc_els_prli);
-
- /* reinitialize remote port roles */
- rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
+ pp = fc_frame_payload_get(fp, len);
+ WARN_ON(!pp);
+ memset(pp, 0, len);
+ pp->prli.prli_cmd = ELS_LS_ACC;
+ pp->prli.prli_spp_len = plen;
+ pp->prli.prli_len = htons(len);
+ len -= sizeof(struct fc_els_prli);
- /*
- * Go through all the service parameter pages and build
- * response. If plen indicates longer SPP than standard,
- * use that. The entire response has been pre-cleared above.
- */
- spp = &pp->spp;
- while (len >= plen) {
- spp->spp_type = rspp->spp_type;
- spp->spp_type_ext = rspp->spp_type_ext;
- spp->spp_flags = rspp->spp_flags & FC_SPP_EST_IMG_PAIR;
- resp = FC_SPP_RESP_ACK;
- if (rspp->spp_flags & FC_SPP_RPA_VAL)
- resp = FC_SPP_RESP_NO_PA;
- switch (rspp->spp_type) {
- case 0: /* common to all FC-4 types */
- break;
- case FC_TYPE_FCP:
- fcp_parm = ntohl(rspp->spp_params);
- if (fcp_parm & FCP_SPPF_RETRY)
- rdata->flags |= FC_RP_FLAGS_RETRY;
- rdata->supported_classes = FC_COS_CLASS3;
- if (fcp_parm & FCP_SPPF_INIT_FCN)
- roles |= FC_RPORT_ROLE_FCP_INITIATOR;
- if (fcp_parm & FCP_SPPF_TARG_FCN)
- roles |= FC_RPORT_ROLE_FCP_TARGET;
- rdata->ids.roles = roles;
-
- spp->spp_params =
- htonl(lport->service_params);
- break;
- default:
- resp = FC_SPP_RESP_INVL;
- break;
+ /*
+ * Go through all the service parameter pages and build
+ * response. If plen indicates longer SPP than standard,
+ * use that. The entire response has been pre-cleared above.
+ */
+ spp = &pp->spp;
+ mutex_lock(&fc_prov_mutex);
+ while (len >= plen) {
+ rdata->spp_type = rspp->spp_type;
+ spp->spp_type = rspp->spp_type;
+ spp->spp_type_ext = rspp->spp_type_ext;
+ resp = 0;
+
+ if (rspp->spp_type < FC_FC4_PROV_SIZE) {
+ prov = fc_active_prov[rspp->spp_type];
+ if (prov)
+ resp = prov->prli(rdata, plen, rspp, spp);
+ prov = fc_passive_prov[rspp->spp_type];
+ if (prov) {
+ passive = prov->prli(rdata, plen, rspp, spp);
+ if (!resp || passive == FC_SPP_RESP_ACK)
+ resp = passive;
}
- spp->spp_flags |= resp;
- len -= plen;
- rspp = (struct fc_els_spp *)((char *)rspp + plen);
- spp = (struct fc_els_spp *)((char *)spp + plen);
}
+ if (!resp) {
+ if (spp->spp_flags & FC_SPP_EST_IMG_PAIR)
+ resp |= FC_SPP_RESP_CONF;
+ else
+ resp |= FC_SPP_RESP_INVL;
+ }
+ spp->spp_flags |= resp;
+ len -= plen;
+ rspp = (struct fc_els_spp *)((char *)rspp + plen);
+ spp = (struct fc_els_spp *)((char *)spp + plen);
+ }
+ mutex_unlock(&fc_prov_mutex);
- /*
- * Send LS_ACC. If this fails, the originator should retry.
- */
- f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ;
- f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT;
- ep = fc_seq_exch(sp);
- fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
- FC_TYPE_ELS, f_ctl, 0);
- lport->tt.seq_send(lport, sp, fp);
+ /*
+ * Send LS_ACC. If this fails, the originator should retry.
+ */
+ fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
+ lport->tt.frame_send(lport, fp);
- /*
- * Get lock and re-check state.
- */
- switch (rdata->rp_state) {
- case RPORT_ST_PRLI:
- fc_rport_enter_ready(rdata);
- break;
- case RPORT_ST_READY:
- case RPORT_ST_ADISC:
- break;
- default:
- break;
- }
+ switch (rdata->rp_state) {
+ case RPORT_ST_PRLI:
+ fc_rport_enter_ready(rdata);
+ break;
+ default:
+ break;
}
+ goto drop;
+
+reject_len:
+ rjt_data.reason = ELS_RJT_PROT;
+ rjt_data.explan = ELS_EXPL_INV_LEN;
+reject:
+ lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
+drop:
fc_frame_free(rx_fp);
}
/**
* fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests
* @rdata: The remote port that sent the PRLO request
- * @sp: The sequence that the PRLO was on
- * @fp: The PRLO request frame
+ * @rx_fp: The PRLO request frame
*
- * Locking Note: The rport lock is exected to be held before calling
+ * Locking Note: The rport lock is expected to be held before calling
* this function.
*/
static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata,
- struct fc_seq *sp,
- struct fc_frame *fp)
+ struct fc_frame *rx_fp)
{
struct fc_lport *lport = rdata->local_port;
-
- struct fc_frame_header *fh;
+ struct fc_frame *fp;
+ struct {
+ struct fc_els_prlo prlo;
+ struct fc_els_spp spp;
+ } *pp;
+ struct fc_els_spp *rspp; /* request service param page */
+ struct fc_els_spp *spp; /* response spp */
+ unsigned int len;
+ unsigned int plen;
struct fc_seq_els_data rjt_data;
- fh = fc_frame_header_get(fp);
-
FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n",
fc_rport_state(rdata));
- rjt_data.fp = NULL;
- rjt_data.reason = ELS_RJT_UNAB;
- rjt_data.explan = ELS_EXPL_NONE;
- lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
- fc_frame_free(fp);
+ len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
+ pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
+ if (!pp)
+ goto reject_len;
+ plen = ntohs(pp->prlo.prlo_len);
+ if (plen != 20)
+ goto reject_len;
+ if (plen < len)
+ len = plen;
+
+ rspp = &pp->spp;
+
+ fp = fc_frame_alloc(lport, len);
+ if (!fp) {
+ rjt_data.reason = ELS_RJT_UNAB;
+ rjt_data.explan = ELS_EXPL_INSUF_RES;
+ goto reject;
+ }
+
+ pp = fc_frame_payload_get(fp, len);
+ WARN_ON(!pp);
+ memset(pp, 0, len);
+ pp->prlo.prlo_cmd = ELS_LS_ACC;
+ pp->prlo.prlo_obs = 0x10;
+ pp->prlo.prlo_len = htons(len);
+ spp = &pp->spp;
+ spp->spp_type = rspp->spp_type;
+ spp->spp_type_ext = rspp->spp_type_ext;
+ spp->spp_flags = FC_SPP_RESP_ACK;
+
+ fc_rport_enter_delete(rdata, RPORT_EV_LOGO);
+
+ fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
+ lport->tt.frame_send(lport, fp);
+ goto drop;
+
+reject_len:
+ rjt_data.reason = ELS_RJT_PROT;
+ rjt_data.explan = ELS_EXPL_INV_LEN;
+reject:
+ lport->tt.seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
+drop:
+ fc_frame_free(rx_fp);
}
/**
* fc_rport_recv_logo_req() - Handler for logout (LOGO) requests
* @lport: The local port that received the LOGO request
- * @sp: The sequence that the LOGO request was on
* @fp: The LOGO request frame
*
- * Locking Note: The rport lock is exected to be held before calling
+ * Locking Note: The rport lock is expected to be held before calling
* this function.
*/
-static void fc_rport_recv_logo_req(struct fc_lport *lport,
- struct fc_seq *sp,
- struct fc_frame *fp)
+static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
{
- struct fc_frame_header *fh;
struct fc_rport_priv *rdata;
u32 sid;
- lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
+ lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
- fh = fc_frame_header_get(fp);
- sid = ntoh24(fh->fh_s_id);
+ sid = fc_frame_sid(fp);
mutex_lock(&lport->disc.disc_mutex);
rdata = lport->tt.rport_lookup(lport, sid);
@@ -1634,13 +1915,6 @@ static void fc_rport_recv_logo_req(struct fc_lport *lport,
fc_rport_state(rdata));
fc_rport_enter_delete(rdata, RPORT_EV_LOGO);
-
- /*
- * If the remote port was created due to discovery, set state
- * to log back in. It may have seen a stale RSCN about us.
- */
- if (rdata->disc_id)
- fc_rport_state_enter(rdata, RPORT_ST_RESTART);
mutex_unlock(&rdata->rp_mutex);
} else
FC_RPORT_ID_DBG(lport, sid,
@@ -1689,9 +1963,82 @@ int fc_rport_init(struct fc_lport *lport)
EXPORT_SYMBOL(fc_rport_init);
/**
+ * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator.
+ * @rdata: remote port private
+ * @spp_len: service parameter page length
+ * @rspp: received service parameter page
+ * @spp: response service parameter page
+ *
+ * Returns the value for the response code to be placed in spp_flags;
+ * Returns 0 if not an initiator.
+ */
+static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len,
+ const struct fc_els_spp *rspp,
+ struct fc_els_spp *spp)
+{
+ struct fc_lport *lport = rdata->local_port;
+ u32 fcp_parm;
+
+ fcp_parm = ntohl(rspp->spp_params);
+ rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
+ if (fcp_parm & FCP_SPPF_INIT_FCN)
+ rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
+ if (fcp_parm & FCP_SPPF_TARG_FCN)
+ rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
+ if (fcp_parm & FCP_SPPF_RETRY)
+ rdata->flags |= FC_RP_FLAGS_RETRY;
+ rdata->supported_classes = FC_COS_CLASS3;
+
+ if (!(lport->service_params & FCP_SPPF_INIT_FCN))
+ return 0;
+
+ spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR;
+
+ /*
+ * OR in our service parameters with other providers (target), if any.
+ */
+ fcp_parm = ntohl(spp->spp_params);
+ spp->spp_params = htonl(fcp_parm | lport->service_params);
+ return FC_SPP_RESP_ACK;
+}
+
+/*
+ * FC-4 provider ops for FCP initiator.
+ */
+struct fc4_prov fc_rport_fcp_init = {
+ .prli = fc_rport_fcp_prli,
+};
+
+/**
+ * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0
+ * @rdata: remote port private
+ * @spp_len: service parameter page length
+ * @rspp: received service parameter page
+ * @spp: response service parameter page
+ */
+static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len,
+ const struct fc_els_spp *rspp,
+ struct fc_els_spp *spp)
+{
+ if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR)
+ return FC_SPP_RESP_INVL;
+ return FC_SPP_RESP_ACK;
+}
+
+/*
+ * FC-4 provider ops for type 0 service parameters.
+ *
+ * This handles the special case of type 0 which is always successful
+ * but doesn't do anything otherwise.
+ */
+struct fc4_prov fc_rport_t0_prov = {
+ .prli = fc_rport_t0_prli,
+};
+
+/**
* fc_setup_rport() - Initialize the rport_event_queue
*/
-int fc_setup_rport()
+int fc_setup_rport(void)
{
rport_event_queue = create_singlethread_workqueue("fc_rport_eq");
if (!rport_event_queue)
@@ -1702,7 +2049,7 @@ int fc_setup_rport()
/**
* fc_destroy_rport() - Destroy the rport_event_queue
*/
-void fc_destroy_rport()
+void fc_destroy_rport(void)
{
destroy_workqueue(rport_event_queue);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 22:16:15 +0000