Currently the fcoe_ctlr associated with an interface is allocated
as a member of struct fcoe_interface. This causes problems when
attempting to use the new fcoe_sysfs APIs which allow us to allocate
the fcoe_interface as private data to the fcoe_ctlr_attrs instance.
The problem is that libfcoe wants to be able use pointer math to find a
fcoe_ctlr's fcoe_ctlr_attrs as well as finding a fcoe_ctlr_attrs'
assocated fcoe_ctlr. To do this we need to allocate the
fcoe_ctlr_attrs, with private data for the LLD. The private data
contains the fcoe_ctlr and it's private data is the fcoe_interface.
+-----------------+
| fcoe_ctlr_attrs |
+-----------------+
| fcoe_ctlr |
+-----------------+
| fcoe_interface |
+-----------------+
This prep work allows us to go from a fcoe_ctlr_attrs instance to its
fcoe_ctlr and we can also go from a fcoe_ctlr to its fcoe_ctlr_attrs
once the fcoe_sysfs API is in use (later patches in this series).
Signed-off-by: Robert Love <robert.w.love@xxxxxxxxx>
Tested-by: Ross Brattain <ross.b.brattain@xxxxxxxxx>
---
drivers/scsi/fcoe/fcoe.c | 132 ++++++++++++++++++++++++++++++----------------
drivers/scsi/fcoe/fcoe.h | 8 ++-
include/scsi/libfcoe.h | 9 +++
3 files changed, 99 insertions(+), 50 deletions(-)
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 58c88b0..85ab965 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -282,7 +282,7 @@ static struct scsi_host_template fcoe_shost_template = {
static int fcoe_interface_setup(struct fcoe_interface *fcoe,
struct net_device *netdev)
{
- struct fcoe_ctlr *fip = &fcoe->ctlr;
+ struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
struct netdev_hw_addr *ha;
struct net_device *real_dev;
u8 flogi_maddr[ETH_ALEN];
@@ -366,7 +366,9 @@ static int fcoe_interface_setup(struct fcoe_interface *fcoe,
static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
enum fip_state fip_mode)
{
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
+ int size;
int err;
if (!try_module_get(THIS_MODULE)) {
@@ -376,7 +378,9 @@ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
goto out;
}
- fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
+ size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
+ ctlr = kzalloc(size, GFP_KERNEL);
+ fcoe = fcoe_ctlr_priv(ctlr);
if (!fcoe) {
FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
fcoe = ERR_PTR(-ENOMEM);
@@ -388,15 +392,14 @@ static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
/*
* Initialize FIP.
*/
- fcoe_ctlr_init(&fcoe->ctlr, fip_mode);
- fcoe->ctlr.send = fcoe_fip_send;
- fcoe->ctlr.update_mac = fcoe_update_src_mac;
- fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
+ fcoe_ctlr_init(ctlr, fip_mode);
+ ctlr->send = fcoe_fip_send;
+ ctlr->update_mac = fcoe_update_src_mac;
+ ctlr->get_src_addr = fcoe_get_src_mac;
err = fcoe_interface_setup(fcoe, netdev);
if (err) {
- fcoe_ctlr_destroy(&fcoe->ctlr);
- kfree(fcoe);
+ fcoe_ctlr_destroy(ctlr);
dev_put(netdev);
fcoe = ERR_PTR(err);
goto out_putmod;
@@ -419,7 +422,7 @@ out:
static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
{
struct net_device *netdev = fcoe->netdev;
- struct fcoe_ctlr *fip = &fcoe->ctlr;
+ struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
u8 flogi_maddr[ETH_ALEN];
const struct net_device_ops *ops;
@@ -459,7 +462,6 @@ static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
/* Release the self-reference taken during fcoe_interface_create() */
/* tear-down the FCoE controller */
fcoe_ctlr_destroy(fip);
- kfree(fcoe);
dev_put(netdev);
module_put(THIS_MODULE);
}
@@ -479,9 +481,11 @@ static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
struct net_device *orig_dev)
{
struct fcoe_interface *fcoe;
+ struct fcoe_ctlr *ctlr;
fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
- fcoe_ctlr_recv(&fcoe->ctlr, skb);
+ ctlr = fcoe_to_ctlr(fcoe);
+ fcoe_ctlr_recv(ctlr, skb);
return 0;
}
@@ -633,11 +637,13 @@ static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
u32 mfs;
u64 wwnn, wwpn;
struct fcoe_interface *fcoe;
+ struct fcoe_ctlr *ctlr;
struct fcoe_port *port;
/* Setup lport private data to point to fcoe softc */
port = lport_priv(lport);
fcoe = port->priv;
+ ctlr = fcoe_to_ctlr(fcoe);
/*
* Determine max frame size based on underlying device and optional
@@ -664,10 +670,10 @@ static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
if (!lport->vport) {
if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
- wwnn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr, 1, 0);
+ wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
fc_set_wwnn(lport, wwnn);
if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
- wwpn = fcoe_wwn_from_mac(fcoe->ctlr.ctl_src_addr,
+ wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
2, 0);
fc_set_wwpn(lport, wwpn);
}
@@ -1036,6 +1042,7 @@ static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
struct device *parent, int npiv)
{
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
struct net_device *netdev = fcoe->netdev;
struct fc_lport *lport, *n_port;
struct fcoe_port *port;
@@ -1099,7 +1106,7 @@ static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
}
/* Initialize the library */
- rc = fcoe_libfc_config(lport, &fcoe->ctlr, &fcoe_libfc_fcn_templ, 1);
+ rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
if (rc) {
FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
"interface\n");
@@ -1366,6 +1373,7 @@ static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
{
struct fc_lport *lport;
struct fcoe_rcv_info *fr;
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
struct fc_frame_header *fh;
struct fcoe_percpu_s *fps;
@@ -1373,7 +1381,8 @@ static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
unsigned int cpu;
fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
- lport = fcoe->ctlr.lp;
+ ctlr = fcoe_to_ctlr(fcoe);
+ lport = ctlr->lp;
if (unlikely(!lport)) {
FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
goto err2;
@@ -1389,8 +1398,8 @@ static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
eh = eth_hdr(skb);
- if (is_fip_mode(&fcoe->ctlr) &&
- compare_ether_addr(eh->h_source, fcoe->ctlr.dest_addr)) {
+ if (is_fip_mode(ctlr) &&
+ compare_ether_addr(eh->h_source, ctlr->dest_addr)) {
FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
eh->h_source);
goto err;
@@ -1524,6 +1533,7 @@ static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
unsigned int elen; /* eth header, may include vlan */
struct fcoe_port *port = lport_priv(lport);
struct fcoe_interface *fcoe = port->priv;
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
u8 sof, eof;
struct fcoe_hdr *hp;
@@ -1539,7 +1549,7 @@ static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
}
if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
- fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
+ fcoe_ctlr_els_send(ctlr, lport, skb))
return 0;
sof = fr_sof(fp);
@@ -1603,12 +1613,12 @@ static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
/* fill up mac and fcoe headers */
eh = eth_hdr(skb);
eh->h_proto = htons(ETH_P_FCOE);
- memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
- if (fcoe->ctlr.map_dest)
+ memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
+ if (ctlr->map_dest)
memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
- if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
- memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
+ if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
+ memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
else
memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
@@ -1657,6 +1667,7 @@ static void fcoe_percpu_flush_done(struct sk_buff *skb)
static inline int fcoe_filter_frames(struct fc_lport *lport,
struct fc_frame *fp)
{
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
struct fc_frame_header *fh;
struct sk_buff *skb = (struct sk_buff *)fp;
@@ -1678,7 +1689,8 @@ static inline int fcoe_filter_frames(struct fc_lport *lport,
return 0;
fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
- if (is_fip_mode(&fcoe->ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
+ ctlr = fcoe_to_ctlr(fcoe);
+ if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
return -EINVAL;
@@ -1857,6 +1869,7 @@ static int fcoe_dcb_app_notification(struct notifier_block *notifier,
ulong event, void *ptr)
{
struct dcb_app_type *entry = ptr;
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
struct net_device *netdev;
struct fcoe_port *port;
@@ -1874,6 +1887,8 @@ static int fcoe_dcb_app_notification(struct notifier_block *notifier,
if (!fcoe)
return NOTIFY_OK;
+ ctlr = fcoe_to_ctlr(fcoe);
+
if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
prio = ffs(entry->app.priority) - 1;
else
@@ -1884,10 +1899,10 @@ static int fcoe_dcb_app_notification(struct notifier_block *notifier,
if (entry->app.protocol == ETH_P_FIP ||
entry->app.protocol == ETH_P_FCOE)
- fcoe->ctlr.priority = prio;
+ ctlr->priority = prio;
if (entry->app.protocol == ETH_P_FCOE) {
- port = lport_priv(fcoe->ctlr.lp);
+ port = lport_priv(ctlr->lp);
port->priority = prio;
}
@@ -1909,6 +1924,7 @@ static int fcoe_device_notification(struct notifier_block *notifier,
{
struct fc_lport *lport = NULL;
struct net_device *netdev = ptr;
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
struct fcoe_port *port;
struct fcoe_dev_stats *stats;
@@ -1918,7 +1934,8 @@ static int fcoe_device_notification(struct notifier_block *notifier,
list_for_each_entry(fcoe, &fcoe_hostlist, list) {
if (fcoe->netdev == netdev) {
- lport = fcoe->ctlr.lp;
+ ctlr = fcoe_to_ctlr(fcoe);
+ lport = ctlr->lp;
break;
}
}
@@ -1947,7 +1964,7 @@ static int fcoe_device_notification(struct notifier_block *notifier,
break;
case NETDEV_UNREGISTER:
list_del(&fcoe->list);
- port = lport_priv(fcoe->ctlr.lp);
+ port = lport_priv(ctlr->lp);
queue_work(fcoe_wq, &port->destroy_work);
goto out;
break;
@@ -1962,8 +1979,8 @@ static int fcoe_device_notification(struct notifier_block *notifier,
fcoe_link_speed_update(lport);
if (link_possible && !fcoe_link_ok(lport))
- fcoe_ctlr_link_up(&fcoe->ctlr);
- else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
+ fcoe_ctlr_link_up(ctlr);
+ else if (fcoe_ctlr_link_down(ctlr)) {
stats = per_cpu_ptr(lport->dev_stats, get_cpu());
stats->LinkFailureCount++;
put_cpu();
@@ -1983,6 +2000,7 @@ out:
*/
static int fcoe_disable(struct net_device *netdev)
{
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
int rc = 0;
@@ -1993,8 +2011,9 @@ static int fcoe_disable(struct net_device *netdev)
rtnl_unlock();
if (fcoe) {
- fcoe_ctlr_link_down(&fcoe->ctlr);
- fcoe_clean_pending_queue(fcoe->ctlr.lp);
+ ctlr = fcoe_to_ctlr(fcoe);
+ fcoe_ctlr_link_down(ctlr);
+ fcoe_clean_pending_queue(ctlr->lp);
} else
rc = -ENODEV;
@@ -2012,6 +2031,7 @@ static int fcoe_disable(struct net_device *netdev)
*/
static int fcoe_enable(struct net_device *netdev)
{
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
int rc = 0;
@@ -2020,11 +2040,17 @@ static int fcoe_enable(struct net_device *netdev)
fcoe = fcoe_hostlist_lookup_port(netdev);
rtnl_unlock();
- if (!fcoe)
+ if (!fcoe) {
rc = -ENODEV;
- else if (!fcoe_link_ok(fcoe->ctlr.lp))
- fcoe_ctlr_link_up(&fcoe->ctlr);
+ goto out;
+ }
+ ctlr = fcoe_to_ctlr(fcoe);
+
+ if (!fcoe_link_ok(ctlr->lp))
+ fcoe_ctlr_link_up(ctlr);
+
+out:
mutex_unlock(&fcoe_config_mutex);
return rc;
}
@@ -2039,6 +2065,7 @@ static int fcoe_enable(struct net_device *netdev)
*/
static int fcoe_destroy(struct net_device *netdev)
{
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
struct fc_lport *lport;
struct fcoe_port *port;
@@ -2051,7 +2078,8 @@ static int fcoe_destroy(struct net_device *netdev)
rc = -ENODEV;
goto out_nodev;
}
- lport = fcoe->ctlr.lp;
+ ctlr = fcoe_to_ctlr(fcoe);
+ lport = ctlr->lp;
port = lport_priv(lport);
list_del(&fcoe->list);
queue_work(fcoe_wq, &port->destroy_work);
@@ -2106,7 +2134,8 @@ static void fcoe_dcb_create(struct fcoe_interface *fcoe)
int dcbx;
u8 fup, up;
struct net_device *netdev = fcoe->realdev;
- struct fcoe_port *port = lport_priv(fcoe->ctlr.lp);
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
+ struct fcoe_port *port = lport_priv(ctlr->lp);
struct dcb_app app = {
.priority = 0,
.protocol = ETH_P_FCOE
@@ -2129,7 +2158,7 @@ static void fcoe_dcb_create(struct fcoe_interface *fcoe)
}
port->priority = ffs(up) ? ffs(up) - 1 : 0;
- fcoe->ctlr.priority = ffs(fup) ? ffs(fup) - 1 : port->priority;
+ ctlr->priority = ffs(fup) ? ffs(fup) - 1 : port->priority;
}
#endif
}
@@ -2146,6 +2175,7 @@ static void fcoe_dcb_create(struct fcoe_interface *fcoe)
static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
{
int rc = 0;
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
struct fc_lport *lport;
@@ -2164,6 +2194,8 @@ static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
goto out_nodev;
}
+ ctlr = fcoe_to_ctlr(fcoe);
+
lport = fcoe_if_create(fcoe, &netdev->dev, 0);
if (IS_ERR(lport)) {
printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
@@ -2175,7 +2207,7 @@ static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
}
/* Make this the "master" N_Port */
- fcoe->ctlr.lp = lport;
+ ctlr->lp = lport;
/* setup DCB priority attributes. */
fcoe_dcb_create(fcoe);
@@ -2187,7 +2219,7 @@ static int fcoe_create(struct net_device *netdev, enum fip_state fip_mode)
lport->boot_time = jiffies;
fc_fabric_login(lport);
if (!fcoe_link_ok(lport))
- fcoe_ctlr_link_up(&fcoe->ctlr);
+ fcoe_ctlr_link_up(ctlr);
out_nodev:
rtnl_unlock();
@@ -2297,11 +2329,12 @@ static int fcoe_reset(struct Scsi_Host *shost)
struct fc_lport *lport = shost_priv(shost);
struct fcoe_port *port = lport_priv(lport);
struct fcoe_interface *fcoe = port->priv;
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
- fcoe_ctlr_link_down(&fcoe->ctlr);
- fcoe_clean_pending_queue(fcoe->ctlr.lp);
- if (!fcoe_link_ok(fcoe->ctlr.lp))
- fcoe_ctlr_link_up(&fcoe->ctlr);
+ fcoe_ctlr_link_down(ctlr);
+ fcoe_clean_pending_queue(ctlr->lp);
+ if (!fcoe_link_ok(ctlr->lp))
+ fcoe_ctlr_link_up(ctlr);
return 0;
}
@@ -2336,10 +2369,12 @@ fcoe_hostlist_lookup_port(const struct net_device *netdev)
*/
static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
{
+ struct fcoe_ctlr *ctlr;
struct fcoe_interface *fcoe;
fcoe = fcoe_hostlist_lookup_port(netdev);
- return (fcoe) ? fcoe->ctlr.lp : NULL;
+ ctlr = fcoe_to_ctlr(fcoe);
+ return (fcoe) ? ctlr->lp : NULL;
}
/**
@@ -2443,6 +2478,7 @@ module_init(fcoe_init);
static void __exit fcoe_exit(void)
{
struct fcoe_interface *fcoe, *tmp;
+ struct fcoe_ctlr *ctlr;
struct fcoe_port *port;
unsigned int cpu;
@@ -2454,7 +2490,8 @@ static void __exit fcoe_exit(void)
rtnl_lock();
list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
list_del(&fcoe->list);
- port = lport_priv(fcoe->ctlr.lp);
+ ctlr = fcoe_to_ctlr(fcoe);
+ port = lport_priv(ctlr->lp);
queue_work(fcoe_wq, &port->destroy_work);
}
rtnl_unlock();
@@ -2550,7 +2587,7 @@ static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
{
struct fcoe_port *port = lport_priv(lport);
struct fcoe_interface *fcoe = port->priv;
- struct fcoe_ctlr *fip = &fcoe->ctlr;
+ struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
struct fc_frame_header *fh = fc_frame_header_get(fp);
switch (op) {
@@ -2724,7 +2761,8 @@ static void fcoe_set_port_id(struct fc_lport *lport,
{
struct fcoe_port *port = lport_priv(lport);
struct fcoe_interface *fcoe = port->priv;
+ struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
- fcoe_ctlr_recv_flogi(&fcoe->ctlr, lport, fp);
+ fcoe_ctlr_recv_flogi(ctlr, lport, fp);
}
diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
index 3c2733a..55fdbdc 100644
--- a/drivers/scsi/fcoe/fcoe.h
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -68,7 +68,6 @@ do { \
* @netdev: The associated net device
* @fcoe_packet_type: FCoE packet type
* @fip_packet_type: FIP packet type
- * @ctlr: The FCoE controller (for FIP)
* @oem: The offload exchange manager for all local port
* instances associated with this port
* This structure is 1:1 with a net devive.
@@ -79,11 +78,14 @@ struct fcoe_interface {
struct net_device *realdev;
struct packet_type fcoe_packet_type;
struct packet_type fip_packet_type;
- struct fcoe_ctlr ctlr;
struct fc_exch_mgr *oem;
};
-#define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)
+#define fcoe_to_ctlr(x) \
+ (struct fcoe_ctlr *)(((struct fcoe_ctlr *)(x)) - 1)
+
+#define fcoe_from_ctlr(x) \
+ ((struct fcoe_interface *)((x) + 1))
/**
* fcoe_netdev() - Return the net device associated with a local port
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index cfdb55f..69eca4b 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -159,6 +159,15 @@ struct fcoe_ctlr {
};
/**
+ * fcoe_ctlr_priv() - Return the private data from a fcoe_ctlr
+ * @cltr: The fcoe_ctlr whose private data will be returned
+ */
+static inline void *fcoe_ctlr_priv(const struct fcoe_ctlr *ctlr)
+{
+ return (void *)(ctlr + 1);
+}
+
+/**
* struct fcoe_fcf - Fibre-Channel Forwarder
* @list: list linkage
* @time: system time (jiffies) when an advertisement was last received
--
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