diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
index 69ac554..23f6eea 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
@@ -542,8 +542,7 @@ static void bnx2fc_recv_frame(struct sk_buff *skb)
vn_port = fc_vport_id_lookup(lport, ntoh24(fh->fh_d_id));
if (vn_port) {
port = lport_priv(vn_port);
- if (compare_ether_addr(port->data_src_addr, dest_mac)
- != 0) {
+ if (!ether_addr_equal(port->data_src_addr, dest_mac)) {
BNX2FC_HBA_DBG(lport, "fpma mismatch\n");
put_cpu();
kfree_skb(skb);
@@ -1381,6 +1380,7 @@ struct bnx2fc_interface *bnx2fc_interface_create(struct bnx2fc_hba *hba,
return NULL;
}
ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+ ctlr->cdev = ctlr_dev;
interface = fcoe_ctlr_priv(ctlr);
dev_hold(netdev);
kref_init(&interface->kref);
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 07453bb..f317000 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -408,6 +408,7 @@ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
}
ctlr = fcoe_ctlr_device_priv(ctlr_dev);
+ ctlr->cdev = ctlr_dev;
fcoe = fcoe_ctlr_priv(ctlr);
dev_hold(netdev);
@@ -1440,22 +1441,28 @@ static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
ctlr = fcoe_to_ctlr(fcoe);
lport = ctlr->lp;
if (unlikely(!lport)) {
- FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
+ FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
goto err2;
}
if (!lport->link_up)
goto err2;
- FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
- "data:%p tail:%p end:%p sum:%d dev:%s",
+ FCOE_NETDEV_DBG(netdev,
+ "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
skb->len, skb->data_len, skb->head, skb->data,
skb_tail_pointer(skb), skb_end_pointer(skb),
skb->csum, skb->dev ? skb->dev->name : "<NULL>");
+
+ skb = skb_share_check(skb, GFP_ATOMIC);
+
+ if (skb == NULL)
+ return NET_RX_DROP;
+
eh = eth_hdr(skb);
if (is_fip_mode(ctlr) &&
- compare_ether_addr(eh->h_source, ctlr->dest_addr)) {
+ !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
eh->h_source);
goto err;
@@ -1540,13 +1547,13 @@ static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
wake_up_process(fps->thread);
spin_unlock(&fps->fcoe_rx_list.lock);
- return 0;
+ return NET_RX_SUCCESS;
err:
per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
put_cpu();
err2:
kfree_skb(skb);
- return -1;
+ return NET_RX_DROP;
}
/**
@@ -1788,13 +1795,13 @@ static void fcoe_recv_frame(struct sk_buff *skb)
lport = fr->fr_dev;
if (unlikely(!lport)) {
if (skb->destructor != fcoe_percpu_flush_done)
- FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
+ FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
kfree_skb(skb);
return;
}
- FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
- "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
+ FCOE_NETDEV_DBG(skb->dev,
+ "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
skb->len, skb->data_len,
skb->head, skb->data, skb_tail_pointer(skb),
skb_end_pointer(skb), skb->csum,
diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c
index 203415e..34a1b1f 100644
--- a/drivers/scsi/fcoe/fcoe_ctlr.c
+++ b/drivers/scsi/fcoe/fcoe_ctlr.c
@@ -160,74 +160,113 @@ void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode)
}
EXPORT_SYMBOL(fcoe_ctlr_init);
+/**
+ * fcoe_sysfs_fcf_add() - Add a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
+ * @new: The newly discovered FCF
+ *
+ * Called with fip->ctlr_mutex held
+ */
static int fcoe_sysfs_fcf_add(struct fcoe_fcf *new)
{
struct fcoe_ctlr *fip = new->fip;
- struct fcoe_ctlr_device *ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip);
- struct fcoe_fcf_device temp, *fcf_dev;
- int rc = 0;
+ struct fcoe_ctlr_device *ctlr_dev;
+ struct fcoe_fcf_device *temp, *fcf_dev;
+ int rc = -ENOMEM;
LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
new->fabric_name, new->fcf_mac);
- mutex_lock(&ctlr_dev->lock);
-
- temp.fabric_name = new->fabric_name;
- temp.switch_name = new->switch_name;
- temp.fc_map = new->fc_map;
- temp.vfid = new->vfid;
- memcpy(temp.mac, new->fcf_mac, ETH_ALEN);
- temp.priority = new->pri;
- temp.fka_period = new->fka_period;
- temp.selected = 0; /* default to unselected */
-
- fcf_dev = fcoe_fcf_device_add(ctlr_dev, &temp);
- if (unlikely(!fcf_dev)) {
- rc = -ENOMEM;
+ temp = kzalloc(sizeof(*temp), GFP_KERNEL);
+ if (!temp)
goto out;
- }
+
+ temp->fabric_name = new->fabric_name;
+ temp->switch_name = new->switch_name;
+ temp->fc_map = new->fc_map;
+ temp->vfid = new->vfid;
+ memcpy(temp->mac, new->fcf_mac, ETH_ALEN);
+ temp->priority = new->pri;
+ temp->fka_period = new->fka_period;
+ temp->selected = 0; /* default to unselected */
/*
- * The fcoe_sysfs layer can return a CONNECTED fcf that
- * has a priv (fcf was never deleted) or a CONNECTED fcf
- * that doesn't have a priv (fcf was deleted). However,
- * libfcoe will always delete FCFs before trying to add
- * them. This is ensured because both recv_adv and
- * age_fcfs are protected by the the fcoe_ctlr's mutex.
- * This means that we should never get a FCF with a
- * non-NULL priv pointer.
+ * If ctlr_dev doesn't exist then it means we're a libfcoe user
+ * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device.
+ * fnic would be an example of a driver with this behavior. In this
+ * case we want to add the fcoe_fcf to the fcoe_ctlr list, but we
+ * don't want to make sysfs changes.
*/
- BUG_ON(fcf_dev->priv);
- fcf_dev->priv = new;
- new->fcf_dev = fcf_dev;
+ ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip);
+ if (ctlr_dev) {
+ mutex_lock(&ctlr_dev->lock);
+ fcf_dev = fcoe_fcf_device_add(ctlr_dev, temp);
+ if (unlikely(!fcf_dev)) {
+ rc = -ENOMEM;
+ mutex_unlock(&ctlr_dev->lock);
+ goto out;
+ }
+
+ /*
+ * The fcoe_sysfs layer can return a CONNECTED fcf that
+ * has a priv (fcf was never deleted) or a CONNECTED fcf
+ * that doesn't have a priv (fcf was deleted). However,
+ * libfcoe will always delete FCFs before trying to add
+ * them. This is ensured because both recv_adv and
+ * age_fcfs are protected by the the fcoe_ctlr's mutex.
+ * This means that we should never get a FCF with a
+ * non-NULL priv pointer.
+ */
+ BUG_ON(fcf_dev->priv);
+
+ fcf_dev->priv = new;
+ new->fcf_dev = fcf_dev;
+ mutex_unlock(&ctlr_dev->lock);
+ }
list_add(&new->list, &fip->fcfs);
fip->fcf_count++;
+ rc = 0;
out:
- mutex_unlock(&ctlr_dev->lock);
+ kfree(temp);
return rc;
}
+/**
+ * fcoe_sysfs_fcf_del() - Remove a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
+ * @new: The FCF to be removed
+ *
+ * Called with fip->ctlr_mutex held
+ */
static void fcoe_sysfs_fcf_del(struct fcoe_fcf *new)
{
struct fcoe_ctlr *fip = new->fip;
- struct fcoe_ctlr_device *ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip);
+ struct fcoe_ctlr_device *cdev;
struct fcoe_fcf_device *fcf_dev;
list_del(&new->list);
fip->fcf_count--;
- mutex_lock(&ctlr_dev->lock);
-
- fcf_dev = fcoe_fcf_to_fcf_dev(new);
- WARN_ON(!fcf_dev);
- new->fcf_dev = NULL;
- fcoe_fcf_device_delete(fcf_dev);
- kfree(new);
-
- mutex_unlock(&ctlr_dev->lock);
+ /*
+ * If ctlr_dev doesn't exist then it means we're a libfcoe user
+ * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device
+ * or a fcoe_fcf_device.
+ *
+ * fnic would be an example of a driver with this behavior. In this
+ * case we want to remove the fcoe_fcf from the fcoe_ctlr list (above),
+ * but we don't want to make sysfs changes.
+ */
+ cdev = fcoe_ctlr_to_ctlr_dev(fip);
+ if (cdev) {
+ mutex_lock(&cdev->lock);
+ fcf_dev = fcoe_fcf_to_fcf_dev(new);
+ WARN_ON(!fcf_dev);
+ new->fcf_dev = NULL;
+ fcoe_fcf_device_delete(fcf_dev);
+ kfree(new);
+ mutex_unlock(&cdev->lock);
+ }
}
/**
@@ -300,7 +339,7 @@ static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
spin_unlock_bh(&fip->ctlr_lock);
sel = fip->sel_fcf;
- if (sel && !compare_ether_addr(sel->fcf_mac, fip->dest_addr))
+ if (sel && ether_addr_equal(sel->fcf_mac, fip->dest_addr))
goto unlock;
if (!is_zero_ether_addr(fip->dest_addr)) {
printk(KERN_NOTICE "libfcoe: host%d: "
@@ -1000,7 +1039,7 @@ static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
if (fcf->switch_name == new.switch_name &&
fcf->fabric_name == new.fabric_name &&
fcf->fc_map == new.fc_map &&
- compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) {
+ ether_addr_equal(fcf->fcf_mac, new.fcf_mac)) {
found = 1;
break;
}
@@ -1340,7 +1379,7 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
mp = (struct fip_mac_desc *)desc;
if (dlen < sizeof(*mp))
goto err;
- if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac))
+ if (!ether_addr_equal(mp->fd_mac, fcf->fcf_mac))
goto err;
desc_mask &= ~BIT(FIP_DT_MAC);
break;
@@ -1418,8 +1457,8 @@ static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
* 'port_id' is already validated, check MAC address and
* wwpn
*/
- if (compare_ether_addr(fip->get_src_addr(vn_port),
- vp->fd_mac) != 0 ||
+ if (!ether_addr_equal(fip->get_src_addr(vn_port),
+ vp->fd_mac) ||
get_unaligned_be64(&vp->fd_wwpn) !=
vn_port->wwpn)
continue;
@@ -1453,6 +1492,9 @@ err:
*/
void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (!skb)
+ return;
skb_queue_tail(&fip->fip_recv_list, skb);
schedule_work(&fip->recv_work);
}
@@ -1479,12 +1521,12 @@ static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
goto drop;
eh = eth_hdr(skb);
if (fip->mode == FIP_MODE_VN2VN) {
- if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) &&
- compare_ether_addr(eh->h_dest, fcoe_all_vn2vn) &&
- compare_ether_addr(eh->h_dest, fcoe_all_p2p))
+ if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
+ !ether_addr_equal(eh->h_dest, fcoe_all_vn2vn) &&
+ !ether_addr_equal(eh->h_dest, fcoe_all_p2p))
goto drop;
- } else if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) &&
- compare_ether_addr(eh->h_dest, fcoe_all_enode))
+ } else if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
+ !ether_addr_equal(eh->h_dest, fcoe_all_enode))
goto drop;
fiph = (struct fip_header *)skb->data;
op = ntohs(fiph->fip_op);
@@ -1856,7 +1898,7 @@ int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
* address_mode flag to use FC_OUI-based Ethernet DA.
* Otherwise we use the FCoE gateway addr
*/
- if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
+ if (ether_addr_equal(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
fcoe_ctlr_map_dest(fip);
} else {
memcpy(fip->dest_addr, sa, ETH_ALEN);
@@ -2825,8 +2867,8 @@ unlock:
* disabled, so that should ensure that this routine is only called
* when nothing is happening.
*/
-void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip,
- enum fip_state fip_mode)
+static void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip,
+ enum fip_state fip_mode)
{
void *priv;
diff --git a/drivers/scsi/fcoe/fcoe_sysfs.c b/drivers/scsi/fcoe/fcoe_sysfs.c
index c9382d6..d0d9a2d 100644
--- a/drivers/scsi/fcoe/fcoe_sysfs.c
+++ b/drivers/scsi/fcoe/fcoe_sysfs.c
@@ -300,29 +300,29 @@ static ssize_t store_ctlr_mode(struct device *dev,
switch (ctlr->enabled) {
case FCOE_CTLR_ENABLED:
- LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.");
+ LIBFCOE_SYSFS_DBG(ctlr, "Cannot change mode when enabled.\n");
return -EBUSY;
case FCOE_CTLR_DISABLED:
if (!ctlr->f->set_fcoe_ctlr_mode) {
LIBFCOE_SYSFS_DBG(ctlr,
- "Mode change not supported by LLD.");
+ "Mode change not supported by LLD.\n");
return -ENOTSUPP;
}
ctlr->mode = fcoe_parse_mode(mode);
if (ctlr->mode == FIP_CONN_TYPE_UNKNOWN) {
- LIBFCOE_SYSFS_DBG(ctlr,
- "Unknown mode %s provided.", buf);
+ LIBFCOE_SYSFS_DBG(ctlr, "Unknown mode %s provided.\n",
+ buf);
return -EINVAL;
}
ctlr->f->set_fcoe_ctlr_mode(ctlr);
- LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.", buf);
+ LIBFCOE_SYSFS_DBG(ctlr, "Mode changed to %s.\n", buf);
return count;
case FCOE_CTLR_UNUSED:
default:
- LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.");
+ LIBFCOE_SYSFS_DBG(ctlr, "Mode change not supported.\n");
return -ENOTSUPP;
};
}
@@ -653,7 +653,7 @@ static int fcoe_fcf_device_match(struct fcoe_fcf_device *new,
if (new->switch_name == old->switch_name &&
new->fabric_name == old->fabric_name &&
new->fc_map == old->fc_map &&
- compare_ether_addr(new->mac, old->mac) == 0)
+ ether_addr_equal(new->mac, old->mac))
return 1;
return 0;
}
diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
index 006fa92..902520c 100644
--- a/drivers/scsi/fnic/fnic_fcs.c
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -651,13 +651,13 @@ void fnic_update_mac_locked(struct fnic *fnic, u8 *new)
if (is_zero_ether_addr(new))
new = ctl;
- if (!compare_ether_addr(data, new))
+ if (ether_addr_equal(data, new))
return;
FNIC_FCS_DBG(KERN_DEBUG, fnic->lport->host, "update_mac %pM\n", new);
- if (!is_zero_ether_addr(data) && compare_ether_addr(data, ctl))
+ if (!is_zero_ether_addr(data) && !ether_addr_equal(data, ctl))
vnic_dev_del_addr(fnic->vdev, data);
memcpy(data, new, ETH_ALEN);
- if (compare_ether_addr(new, ctl))
+ if (!ether_addr_equal(new, ctl))
vnic_dev_add_addr(fnic->vdev, new);
}
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 5879929..1b3a094 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -27,6 +27,7 @@
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/export.h>
+#include <linux/log2.h>
#include <scsi/fc/fc_fc2.h>
@@ -303,10 +304,7 @@ static void fc_exch_setup_hdr(struct fc_exch *ep, struct fc_frame *fp,
fr_eof(fp) = FC_EOF_N;
}
- /*
- * Initialize remainig fh fields
- * from fc_fill_fc_hdr
- */
+ /* Initialize remaining fh fields from fc_fill_fc_hdr */
fh->fh_ox_id = htons(ep->oxid);
fh->fh_rx_id = htons(ep->rxid);
fh->fh_seq_id = ep->seq.id;
@@ -362,9 +360,10 @@ static inline void fc_exch_timer_set_locked(struct fc_exch *ep,
FC_EXCH_DBG(ep, "Exchange timer armed : %d msecs\n", timer_msec);
- if (queue_delayed_work(fc_exch_workqueue, &ep->timeout_work,
- msecs_to_jiffies(timer_msec)))
- fc_exch_hold(ep); /* hold for timer */
+ fc_exch_hold(ep); /* hold for timer */
+ if (!queue_delayed_work(fc_exch_workqueue, &ep->timeout_work,
+ msecs_to_jiffies(timer_msec)))
+ fc_exch_release(ep);
}
/**
@@ -382,6 +381,8 @@ static void fc_exch_timer_set(struct fc_exch *ep, unsigned int timer_msec)
/**
* fc_exch_done_locked() - Complete an exchange with the exchange lock held
* @ep: The exchange that is complete
+ *
+ * Note: May sleep if invoked from outside a response handler.
*/
static int fc_exch_done_locked(struct fc_exch *ep)
{
@@ -393,7 +394,6 @@ static int fc_exch_done_locked(struct fc_exch *ep)
* ep, and in that case we only clear the resp and set it as
* complete, so it can be reused by the timer to send the rrq.
*/
- ep->resp = NULL;
if (ep->state & FC_EX_DONE)
return rc;
ep->esb_stat |= ESB_ST_COMPLETE;
@@ -464,15 +464,21 @@ static void fc_exch_delete(struct fc_exch *ep)
}
static int fc_seq_send_locked(struct fc_lport *lport, struct fc_seq *sp,
- struct fc_frame *fp)
+ struct fc_frame *fp)
{
struct fc_exch *ep;
struct fc_frame_header *fh = fc_frame_header_get(fp);
- int error;
+ int error = -ENXIO;
u32 f_ctl;
u8 fh_type = fh->fh_type;
ep = fc_seq_exch(sp);
+
+ if (ep->esb_stat & (ESB_ST_COMPLETE | ESB_ST_ABNORMAL)) {
+ fc_frame_free(fp);
+ goto out;
+ }
+
WARN_ON(!(ep->esb_stat & ESB_ST_SEQ_INIT));
f_ctl = ntoh24(fh->fh_f_ctl);
@@ -515,6 +521,9 @@ out:
* @lport: The local port that the exchange will be sent on
* @sp: The sequence to be sent
* @fp: The frame to be sent on the exchange
+ *
+ * Note: The frame will be freed either by a direct call to fc_frame_free(fp)
+ * or indirectly by calling libfc_function_template.frame_send().
*/
static int fc_seq_send(struct fc_lport *lport, struct fc_seq *sp,
struct fc_frame *fp)
@@ -581,6 +590,8 @@ static struct fc_seq *fc_seq_start_next(struct fc_seq *sp)
/*
* Set the response handler for the exchange associated with a sequence.
+ *
+ * Note: May sleep if invoked from outside a response handler.
*/
static void fc_seq_set_resp(struct fc_seq *sp,
void (*resp)(struct fc_seq *, struct fc_frame *,
@@ -588,8 +599,18 @@ static void fc_seq_set_resp(struct fc_seq *sp,
void *arg)
{
struct fc_exch *ep = fc_seq_exch(sp);
+ DEFINE_WAIT(wait);
spin_lock_bh(&ep->ex_lock);
+ while (ep->resp_active && ep->resp_task != current) {
+ prepare_to_wait(&ep->resp_wq, &wait, TASK_UNINTERRUPTIBLE);
+ spin_unlock_bh(&ep->ex_lock);
+
+ schedule();
+
+ spin_lock_bh(&ep->ex_lock);
+ }
+ finish_wait(&ep->resp_wq, &wait);
ep->resp = resp;
ep->arg = arg;
spin_unlock_bh(&ep->ex_lock);
@@ -622,27 +643,31 @@ static int fc_exch_abort_locked(struct fc_exch *ep,
if (!sp)
return -ENOMEM;
- ep->esb_stat |= ESB_ST_SEQ_INIT | ESB_ST_ABNORMAL;
if (timer_msec)
fc_exch_timer_set_locked(ep, timer_msec);
- /*
- * If not logged into the fabric, don't send ABTS but leave
- * sequence active until next timeout.
- */
- if (!ep->sid)
- return 0;
-
- /*
- * Send an abort for the sequence that timed out.
- */
- fp = fc_frame_alloc(ep->lp, 0);
- if (fp) {
- fc_fill_fc_hdr(fp, FC_RCTL_BA_ABTS, ep->did, ep->sid,
- FC_TYPE_BLS, FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
- error = fc_seq_send_locked(ep->lp, sp, fp);
- } else
- error = -ENOBUFS;
+ if (ep->sid) {
+ /*
+ * Send an abort for the sequence that timed out.
+ */
+ fp = fc_frame_alloc(ep->lp, 0);
+ if (fp) {
+ ep->esb_stat |= ESB_ST_SEQ_INIT;
+ fc_fill_fc_hdr(fp, FC_RCTL_BA_ABTS, ep->did, ep->sid,
+ FC_TYPE_BLS, FC_FC_END_SEQ |
+ FC_FC_SEQ_INIT, 0);
+ error = fc_seq_send_locked(ep->lp, sp, fp);
+ } else {
+ error = -ENOBUFS;
+ }
+ } else {
+ /*
+ * If not logged into the fabric, don't send ABTS but leave
+ * sequence active until next timeout.
+ */
+ error = 0;
+ }
+ ep->esb_stat |= ESB_ST_ABNORMAL;
return error;
}
@@ -669,6 +694,61 @@ static int fc_seq_exch_abort(const struct fc_seq *req_sp,
}
/**
+ * fc_invoke_resp() - invoke ep->resp()
+ *
+ * Notes:
+ * It is assumed that after initialization finished (this means the
+ * first unlock of ex_lock after fc_exch_alloc()) ep->resp and ep->arg are
+ * modified only via fc_seq_set_resp(). This guarantees that none of these
+ * two variables changes if ep->resp_active > 0.
+ *
+ * If an fc_seq_set_resp() call is busy modifying ep->resp and ep->arg when
+ * this function is invoked, the first spin_lock_bh() call in this function
+ * will wait until fc_seq_set_resp() has finished modifying these variables.
+ *
+ * Since fc_exch_done() invokes fc_seq_set_resp() it is guaranteed that that
+ * ep->resp() won't be invoked after fc_exch_done() has returned.
+ *
+ * The response handler itself may invoke fc_exch_done(), which will clear the
+ * ep->resp pointer.
+ *
+ * Return value:
+ * Returns true if and only if ep->resp has been invoked.
+ */
+static bool fc_invoke_resp(struct fc_exch *ep, struct fc_seq *sp,
+ struct fc_frame *fp)
+{
+ void (*resp)(struct fc_seq *, struct fc_frame *fp, void *arg);
+ void *arg;
+ bool res = false;
+
+ spin_lock_bh(&ep->ex_lock);
+ ep->resp_active++;
+ if (ep->resp_task != current)
+ ep->resp_task = !ep->resp_task ? current : NULL;
+ resp = ep->resp;
+ arg = ep->arg;
+ spin_unlock_bh(&ep->ex_lock);
+
+ if (resp) {
+ resp(sp, fp, arg);
+ res = true;
+ } else if (!IS_ERR(fp)) {
+ fc_frame_free(fp);
+ }
+
+ spin_lock_bh(&ep->ex_lock);
+ if (--ep->resp_active == 0)
+ ep->resp_task = NULL;
+ spin_unlock_bh(&ep->ex_lock);
+
+ if (ep->resp_active == 0)
+ wake_up(&ep->resp_wq);
+
+ return res;
+}
+
+/**
* fc_exch_timeout() - Handle exchange timer expiration
* @work: The work_struct identifying the exchange that timed out
*/
@@ -677,8 +757,6 @@ static void fc_exch_timeout(struct work_struct *work)
struct fc_exch *ep = container_of(work, struct fc_exch,
timeout_work.work);
struct fc_seq *sp = &ep->seq;
- void (*resp)(struct fc_seq *, struct fc_frame *fp, void *arg);
- void *arg;
u32 e_stat;
int rc = 1;
@@ -696,16 +774,13 @@ static void fc_exch_timeout(struct work_struct *work)
fc_exch_rrq(ep);
goto done;
} else {
- resp = ep->resp;
- arg = ep->arg;
- ep->resp = NULL;
if (e_stat & ESB_ST_ABNORMAL)
rc = fc_exch_done_locked(ep);
spin_unlock_bh(&ep->ex_lock);
if (!rc)
fc_exch_delete(ep);
- if (resp)
- resp(sp, ERR_PTR(-FC_EX_TIMEOUT), arg);
+ fc_invoke_resp(ep, sp, ERR_PTR(-FC_EX_TIMEOUT));
+ fc_seq_set_resp(sp, NULL, ep->arg);
fc_seq_exch_abort(sp, 2 * ep->r_a_tov);
goto done;
}
@@ -792,6 +867,8 @@ hit:
ep->f_ctl = FC_FC_FIRST_SEQ; /* next seq is first seq */
ep->rxid = FC_XID_UNKNOWN;
ep->class = mp->class;
+ ep->resp_active = 0;
+ init_waitqueue_head(&ep->resp_wq);
INIT_DELAYED_WORK(&ep->timeout_work, fc_exch_timeout);
out:
return ep;
@@ -838,8 +915,10 @@ static struct fc_exch *fc_exch_find(struct fc_exch_mgr *mp, u16 xid)
pool = per_cpu_ptr(mp->pool, xid & fc_cpu_mask);
spin_lock_bh(&pool->lock);
ep = fc_exch_ptr_get(pool, (xid - mp->min_xid) >> fc_cpu_order);
- if (ep && ep->xid == xid)
+ if (ep) {
+ WARN_ON(ep->xid != xid);
fc_exch_hold(ep);
+ }
spin_unlock_bh(&pool->lock);
}
return ep;
@@ -850,6 +929,8 @@ static struct fc_exch *fc_exch_find(struct fc_exch_mgr *mp, u16 xid)
* fc_exch_done() - Indicate that an exchange/sequence tuple is complete and
* the memory allocated for the related objects may be freed.
* @sp: The sequence that has completed
+ *
+ * Note: May sleep if invoked from outside a response handler.
*/
static void fc_exch_done(struct fc_seq *sp)
{
@@ -859,6 +940,8 @@ static void fc_exch_done(struct fc_seq *sp)
spin_lock_bh(&ep->ex_lock);
rc = fc_exch_done_locked(ep);
spin_unlock_bh(&ep->ex_lock);
+
+ fc_seq_set_resp(sp, NULL, ep->arg);
if (!rc)
fc_exch_delete(ep);
}
@@ -987,6 +1070,7 @@ static enum fc_pf_rjt_reason fc_seq_lookup_recip(struct fc_lport *lport,
}
}
+ spin_lock_bh(&ep->ex_lock);
/*
* At this point, we have the exchange held.
* Find or create the sequence.
@@ -1014,11 +1098,11 @@ static enum fc_pf_rjt_reason fc_seq_lookup_recip(struct fc_lport *lport,
* sending RSP, hence write request on other
* end never finishes.
*/
- spin_lock_bh(&ep->ex_lock);
sp->ssb_stat |= SSB_ST_RESP;
sp->id = fh->fh_seq_id;
- spin_unlock_bh(&ep->ex_lock);
} else {
+ spin_unlock_bh(&ep->ex_lock);
+
/* sequence/exch should exist */
reject = FC_RJT_SEQ_ID;
goto rel;
@@ -1029,6 +1113,7 @@ static enum fc_pf_rjt_reason fc_seq_lookup_recip(struct fc_lport *lport,
if (f_ctl & FC_FC_SEQ_INIT)
ep->esb_stat |= ESB_ST_SEQ_INIT;
+ spin_unlock_bh(&ep->ex_lock);
fr_seq(fp) = sp;
out:
@@ -1291,21 +1376,23 @@ static void fc_exch_recv_abts(struct fc_exch *ep, struct fc_frame *rx_fp)
if (!ep)
goto reject;
+
+ fp = fc_frame_alloc(ep->lp, sizeof(*ap));
+ if (!fp)
+ goto free;
+
spin_lock_bh(&ep->ex_lock);
if (ep->esb_stat & ESB_ST_COMPLETE) {
spin_unlock_bh(&ep->ex_lock);
+
+ fc_frame_free(fp);
goto reject;
}
- if (!(ep->esb_stat & ESB_ST_REC_QUAL))
+ if (!(ep->esb_stat & ESB_ST_REC_QUAL)) {
+ ep->esb_stat |= ESB_ST_REC_QUAL;
fc_exch_hold(ep); /* hold for REC_QUAL */
- ep->esb_stat |= ESB_ST_ABNORMAL | ESB_ST_REC_QUAL;
- fc_exch_timer_set_locked(ep, ep->r_a_tov);
-
- fp = fc_frame_alloc(ep->lp, sizeof(*ap));
- if (!fp) {
- spin_unlock_bh(&ep->ex_lock);
- goto free;
}
+ fc_exch_timer_set_locked(ep, ep->r_a_tov);
fh = fc_frame_header_get(fp);
ap = fc_frame_payload_get(fp, sizeof(*ap));
memset(ap, 0, sizeof(*ap));
@@ -1319,14 +1406,16 @@ static void fc_exch_recv_abts(struct fc_exch *ep, struct fc_frame *rx_fp)
}
sp = fc_seq_start_next_locked(sp);
fc_seq_send_last(sp, fp, FC_RCTL_BA_ACC, FC_TYPE_BLS);
+ ep->esb_stat |= ESB_ST_ABNORMAL;
spin_unlock_bh(&ep->ex_lock);
+
+free:
fc_frame_free(rx_fp);
return;
reject:
fc_exch_send_ba_rjt(rx_fp, FC_BA_RJT_UNABLE, FC_BA_RJT_INV_XID);
-free:
- fc_frame_free(rx_fp);
+ goto free;
}
/**
@@ -1416,9 +1505,7 @@ static void fc_exch_recv_req(struct fc_lport *lport, struct fc_exch_mgr *mp,
* If new exch resp handler is valid then call that
* first.
*/
- if (ep->resp)
- ep->resp(sp, fp, ep->arg);
- else
+ if (!fc_invoke_resp(ep, sp, fp))
lport->tt.lport_recv(lport, fp);
fc_exch_release(ep); /* release from lookup */
} else {
@@ -1442,8 +1529,6 @@ static void fc_exch_recv_seq_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
struct fc_exch *ep;
enum fc_sof sof;
u32 f_ctl;
- void (*resp)(struct fc_seq *, struct fc_frame *fp, void *arg);
- void *ex_resp_arg;
int rc;
ep = fc_exch_find(mp, ntohs(fh->fh_ox_id));
@@ -1478,19 +1563,19 @@ static void fc_exch_recv_seq_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
f_ctl = ntoh24(fh->fh_f_ctl);
fr_seq(fp) = sp;
+
+ spin_lock_bh(&ep->ex_lock);
if (f_ctl & FC_FC_SEQ_INIT)
ep->esb_stat |= ESB_ST_SEQ_INIT;
+ spin_unlock_bh(&ep->ex_lock);
if (fc_sof_needs_ack(sof))
fc_seq_send_ack(sp, fp);
- resp = ep->resp;
- ex_resp_arg = ep->arg;
if (fh->fh_type != FC_TYPE_FCP && fr_eof(fp) == FC_EOF_T &&
(f_ctl & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
(FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
spin_lock_bh(&ep->ex_lock);
- resp = ep->resp;
rc = fc_exch_done_locked(ep);
WARN_ON(fc_seq_exch(sp) != ep);
spin_unlock_bh(&ep->ex_lock);
@@ -1511,10 +1596,8 @@ static void fc_exch_recv_seq_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
* If new exch resp handler is valid then call that
* first.
*/
- if (resp)
- resp(sp, fp, ex_resp_arg);
- else
- fc_frame_free(fp);
+ fc_invoke_resp(ep, sp, fp);
+
fc_exch_release(ep);
return;
rel:
@@ -1553,8 +1636,6 @@ static void fc_exch_recv_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
*/
static void fc_exch_abts_resp(struct fc_exch *ep, struct fc_frame *fp)
{
- void (*resp)(struct fc_seq *, struct fc_frame *fp, void *arg);
- void *ex_resp_arg;
struct fc_frame_header *fh;
struct fc_ba_acc *ap;
struct fc_seq *sp;
@@ -1599,9 +1680,6 @@ static void fc_exch_abts_resp(struct fc_exch *ep, struct fc_frame *fp)
break;
}
- resp = ep->resp;
- ex_resp_arg = ep->arg;
-
/* do we need to do some other checks here. Can we reuse more of
* fc_exch_recv_seq_resp
*/
@@ -1613,17 +1691,14 @@ static void fc_exch_abts_resp(struct fc_exch *ep, struct fc_frame *fp)
ntoh24(fh->fh_f_ctl) & FC_FC_LAST_SEQ)
rc = fc_exch_done_locked(ep);
spin_unlock_bh(&ep->ex_lock);
+
+ fc_exch_hold(ep);
if (!rc)
fc_exch_delete(ep);
-
- if (resp)
- resp(sp, fp, ex_resp_arg);
- else
- fc_frame_free(fp);
-
+ fc_invoke_resp(ep, sp, fp);
if (has_rec)
fc_exch_timer_set(ep, ep->r_a_tov);
-
+ fc_exch_release(ep);
}
/**
@@ -1662,7 +1737,7 @@ static void fc_exch_recv_bls(struct fc_exch_mgr *mp, struct fc_frame *fp)
break;
default:
if (ep)
- FC_EXCH_DBG(ep, "BLS rctl %x - %s received",
+ FC_EXCH_DBG(ep, "BLS rctl %x - %s received\n",
fh->fh_r_ctl,
fc_exch_rctl_name(fh->fh_r_ctl));
break;
@@ -1745,32 +1820,33 @@ static void fc_seq_ls_rjt(struct fc_frame *rx_fp, enum fc_els_rjt_reason reason,
/**
* fc_exch_reset() - Reset an exchange
* @ep: The exchange to be reset
+ *
+ * Note: May sleep if invoked from outside a response handler.
*/
static void fc_exch_reset(struct fc_exch *ep)
{
struct fc_seq *sp;
- void (*resp)(struct fc_seq *, struct fc_frame *, void *);
- void *arg;
int rc = 1;
spin_lock_bh(&ep->ex_lock);
fc_exch_abort_locked(ep, 0);
ep->state |= FC_EX_RST_CLEANUP;
fc_exch_timer_cancel(ep);
- resp = ep->resp;
- ep->resp = NULL;
if (ep->esb_stat & ESB_ST_REC_QUAL)
atomic_dec(&ep->ex_refcnt); /* drop hold for rec_qual */
ep->esb_stat &= ~ESB_ST_REC_QUAL;
- arg = ep->arg;
sp = &ep->seq;
rc = fc_exch_done_locked(ep);
spin_unlock_bh(&ep->ex_lock);
+
+ fc_exch_hold(ep);
+
if (!rc)
fc_exch_delete(ep);
- if (resp)
- resp(sp, ERR_PTR(-FC_EX_CLOSED), arg);
+ fc_invoke_resp(ep, sp, ERR_PTR(-FC_EX_CLOSED));
+ fc_seq_set_resp(sp, NULL, ep->arg);
+ fc_exch_release(ep);
}
/**
@@ -1956,13 +2032,13 @@ static void fc_exch_rrq_resp(struct fc_seq *sp, struct fc_frame *fp, void *arg)
switch (op) {
case ELS_LS_RJT:
- FC_EXCH_DBG(aborted_ep, "LS_RJT for RRQ");
+ FC_EXCH_DBG(aborted_ep, "LS_RJT for RRQ\n");
/* fall through */
case ELS_LS_ACC:
goto cleanup;
default:
- FC_EXCH_DBG(aborted_ep, "unexpected response op %x "
- "for RRQ", op);
+ FC_EXCH_DBG(aborted_ep, "unexpected response op %x for RRQ\n",
+ op);
return;
}
@@ -2533,13 +2609,8 @@ int fc_setup_exch_mgr(void)
* cpu on which exchange originated by simple bitwise
* AND operation between fc_cpu_mask and exchange id.
*/
- fc_cpu_mask = 1;
- fc_cpu_order = 0;
- while (fc_cpu_mask < nr_cpu_ids) {
- fc_cpu_mask <<= 1;
- fc_cpu_order++;
- }
- fc_cpu_mask--;
+ fc_cpu_order = ilog2(roundup_pow_of_two(nr_cpu_ids));
+ fc_cpu_mask = (1 << fc_cpu_order) - 1;
fc_exch_workqueue = create_singlethread_workqueue("fc_exch_workqueue");
if (!fc_exch_workqueue)
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 5fd0f1f..1d7e76e 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -902,7 +902,8 @@ static void fc_fcp_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
/*
* Check for missing or extra data frames.
*/
- if (unlikely(fsp->xfer_len != expected_len)) {
+ if (unlikely(fsp->cdb_status == SAM_STAT_GOOD &&
+ fsp->xfer_len != expected_len)) {
if (fsp->xfer_len < expected_len) {
/*
* Some data may be queued locally,
@@ -955,12 +956,11 @@ static void fc_fcp_complete_locked(struct fc_fcp_pkt *fsp)
* Test for transport underrun, independent of response
* underrun status.
*/
- if (fsp->xfer_len < fsp->data_len && !fsp->io_status &&
+ if (fsp->cdb_status == SAM_STAT_GOOD &&
+ fsp->xfer_len < fsp->data_len && !fsp->io_status &&
(!(fsp->scsi_comp_flags & FCP_RESID_UNDER) ||
- fsp->xfer_len < fsp->data_len - fsp->scsi_resid)) {
+ fsp->xfer_len < fsp->data_len - fsp->scsi_resid))
fsp->status_code = FC_DATA_UNDRUN;
- fsp->io_status = 0;
- }
}
seq = fsp->seq_ptr;
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index f04d15c..e01a298 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -516,7 +516,7 @@ static void fc_lport_recv_rnid_req(struct fc_lport *lport,
* @lport: The local port receiving the LOGO
* @fp: The LOGO request frame
*
- * Locking Note: The lport lock is exected to be held before calling
+ * Locking Note: The lport lock is expected to be held before calling
* this function.
*/
static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
@@ -1088,7 +1088,7 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
{
unsigned long delay = 0;
FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
- PTR_ERR(fp), fc_lport_state(lport),
+ IS_ERR(fp) ? -PTR_ERR(fp) : 0, fc_lport_state(lport),
lport->retry_count);
if (PTR_ERR(fp) == -FC_EX_CLOSED)
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index c710d90..589ff9a 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1705,7 +1705,7 @@ reject:
* @rdata: The remote port that sent the PRLI request
* @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,
@@ -1824,7 +1824,7 @@ drop:
* @rdata: The remote port that sent the PRLO request
* @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,
@@ -1895,7 +1895,7 @@ drop:
* @lport: The local port that received the LOGO request
* @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_frame *fp)
diff --git a/include/scsi/fc/fc_fc2.h b/include/scsi/fc/fc_fc2.h
index f87777d..0b26714 100644
--- a/include/scsi/fc/fc_fc2.h
+++ b/include/scsi/fc/fc_fc2.h
@@ -104,7 +104,7 @@ struct fc_esb {
* esb_e_stat - flags from FC-FS-2 T11/1619-D Rev 0.90.
*/
#define ESB_ST_RESP (1 << 31) /* responder to exchange */
-#define ESB_ST_SEQ_INIT (1 << 30) /* port holds sequence initiaive */
+#define ESB_ST_SEQ_INIT (1 << 30) /* port holds sequence initiative */
#define ESB_ST_COMPLETE (1 << 29) /* exchange is complete */
#define ESB_ST_ABNORMAL (1 << 28) /* abnormal ending condition */
#define ESB_ST_REC_QUAL (1 << 26) /* recovery qualifier active */
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index e1379b4..52beadf 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -410,6 +410,12 @@ struct fc_seq {
* @fh_type: The frame type
* @class: The class of service
* @seq: The sequence in use on this exchange
+ * @resp_active: Number of tasks that are concurrently executing @resp().
+ * @resp_task: If @resp_active > 0, either the task executing @resp(), the
+ * task that has been interrupted to execute the soft-IRQ
+ * executing @resp() or NULL if more than one task is executing
+ * @resp concurrently.
+ * @resp_wq: Waitqueue for the tasks waiting on @resp_active.
* @resp: Callback for responses on this exchange
* @destructor: Called when destroying the exchange
* @arg: Passed as a void pointer to the resp() callback
@@ -441,6 +447,9 @@ struct fc_exch {
u32 r_a_tov;
u32 f_ctl;
struct fc_seq seq;
+ int resp_active;
+ struct task_struct *resp_task;
+ wait_queue_head_t resp_wq;
void (*resp)(struct fc_seq *, struct fc_frame *, void *);
void *arg;
void (*destructor)(struct fc_seq *, void *);
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index 4427393..de7e3ee 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -90,6 +90,7 @@ enum fip_state {
* @lp: &fc_lport: libfc local port.
* @sel_fcf: currently selected FCF, or NULL.
* @fcfs: list of discovered FCFs.
+ * @cdev: (Optional) pointer to sysfs fcoe_ctlr_device.
* @fcf_count: number of discovered FCF entries.
* @sol_time: time when a multicast solicitation was last sent.
* @sel_time: time after which to select an FCF.
@@ -127,6 +128,7 @@ struct fcoe_ctlr {
struct fc_lport *lp;
struct fcoe_fcf *sel_fcf;
struct list_head fcfs;
+ struct fcoe_ctlr_device *cdev;
u16 fcf_count;
unsigned long sol_time;
unsigned long sel_time;
@@ -168,8 +170,11 @@ static inline void *fcoe_ctlr_priv(const struct fcoe_ctlr *ctlr)
return (void *)(ctlr + 1);
}
+/*
+ * This assumes that the fcoe_ctlr (x) is allocated with the fcoe_ctlr_device.
+ */
#define fcoe_ctlr_to_ctlr_dev(x) \
- (struct fcoe_ctlr_device *)(((struct fcoe_ctlr_device *)(x)) - 1)
+ (x)->cdev
/**
* struct fcoe_fcf - Fibre-Channel Forwarder