[SCSI] fcoe: Use per-CPU kernel function for dev_stats instead of an array
Remove the hotplug creation of dev_stats, we allocate for all possible CPUs
now when we allocate the lport.
v2: Durring the 2.6.30 merge window, before these patches were comitted,
'percpu_ptr' was renamed 'per_cpu_ptr'. This latest update updates this
patch for the name change.
Signed-off-by: Yi Zou <yi.zou@intel.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index d22275b..648a2fc 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -71,9 +71,6 @@
/* Function Prototyes */
static int fcoe_check_wait_queue(struct fc_lport *);
static void fcoe_recv_flogi(struct fcoe_softc *, struct fc_frame *, u8 *);
-#ifdef CONFIG_HOTPLUG_CPU
-static int fcoe_cpu_callback(struct notifier_block *, ulong, void *);
-#endif /* CONFIG_HOTPLUG_CPU */
static int fcoe_device_notification(struct notifier_block *, ulong, void *);
static void fcoe_dev_setup(void);
static void fcoe_dev_cleanup(void);
@@ -83,87 +80,6 @@
.notifier_call = fcoe_device_notification,
};
-
-#ifdef CONFIG_HOTPLUG_CPU
-static struct notifier_block fcoe_cpu_notifier = {
- .notifier_call = fcoe_cpu_callback,
-};
-
-/**
- * fcoe_create_percpu_data() - creates the associated cpu data
- * @cpu: index for the cpu where fcoe cpu data will be created
- *
- * create percpu stats block, from cpu add notifier
- *
- * Returns: none
- */
-static void fcoe_create_percpu_data(unsigned int cpu)
-{
- struct fc_lport *lp;
- struct fcoe_softc *fc;
-
- write_lock_bh(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- lp = fc->lp;
- if (lp->dev_stats[cpu] == NULL)
- lp->dev_stats[cpu] =
- kzalloc(sizeof(struct fcoe_dev_stats),
- GFP_KERNEL);
- }
- write_unlock_bh(&fcoe_hostlist_lock);
-}
-
-/**
- * fcoe_destroy_percpu_data() - destroys the associated cpu data
- * @cpu: index for the cpu where fcoe cpu data will destroyed
- *
- * destroy percpu stats block called by cpu add/remove notifier
- *
- * Retuns: none
- */
-static void fcoe_destroy_percpu_data(unsigned int cpu)
-{
- struct fc_lport *lp;
- struct fcoe_softc *fc;
-
- write_lock_bh(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- lp = fc->lp;
- kfree(lp->dev_stats[cpu]);
- lp->dev_stats[cpu] = NULL;
- }
- write_unlock_bh(&fcoe_hostlist_lock);
-}
-
-/**
- * fcoe_cpu_callback() - fcoe cpu hotplug event callback
- * @nfb: callback data block
- * @action: event triggering the callback
- * @hcpu: index for the cpu of this event
- *
- * this creates or destroys per cpu data for fcoe
- *
- * Returns NOTIFY_OK always.
- */
-static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action,
- void *hcpu)
-{
- unsigned int cpu = (unsigned long)hcpu;
-
- switch (action) {
- case CPU_ONLINE:
- fcoe_create_percpu_data(cpu);
- break;
- case CPU_DEAD:
- fcoe_destroy_percpu_data(cpu);
- break;
- default:
- break;
- }
- return NOTIFY_OK;
-}
-#endif /* CONFIG_HOTPLUG_CPU */
-
/**
* fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ
* @skb: the receive skb
@@ -181,7 +97,6 @@
struct fc_lport *lp;
struct fcoe_rcv_info *fr;
struct fcoe_softc *fc;
- struct fcoe_dev_stats *stats;
struct fc_frame_header *fh;
struct fcoe_percpu_s *fps;
unsigned short oxid;
@@ -252,13 +167,7 @@
return 0;
err:
-#ifdef CONFIG_SMP
- stats = lp->dev_stats[smp_processor_id()];
-#else
- stats = lp->dev_stats[0];
-#endif
- if (stats)
- stats->ErrorFrames++;
+ fc_lport_get_stats(lp)->ErrorFrames++;
err2:
kfree_skb(skb);
@@ -495,11 +404,9 @@
}
#endif
/* update tx stats: regardless if LLD fails */
- stats = lp->dev_stats[smp_processor_id()];
- if (stats) {
- stats->TxFrames++;
- stats->TxWords += wlen;
- }
+ stats = fc_lport_get_stats(lp);
+ stats->TxFrames++;
+ stats->TxWords += wlen;
/* send down to lld */
fr_dev(fp) = lp;
@@ -565,8 +472,6 @@
continue;
}
- stats = lp->dev_stats[smp_processor_id()];
-
if (unlikely(debug_fcoe)) {
FC_DBG("skb_info: len:%d data_len:%d head:%p data:%p "
"tail:%p end:%p sum:%d dev:%s",
@@ -593,13 +498,16 @@
hp = (struct fcoe_hdr *) skb_network_header(skb);
fh = (struct fc_frame_header *) skb_transport_header(skb);
+ stats = fc_lport_get_stats(lp);
if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
- if (stats) {
- if (stats->ErrorFrames < 5)
- FC_DBG("unknown FCoE version %x",
- FC_FCOE_DECAPS_VER(hp));
- stats->ErrorFrames++;
- }
+ if (stats->ErrorFrames < 5)
+ printk(KERN_WARNING "FCoE version "
+ "mismatch: The frame has "
+ "version %x, but the "
+ "initiator supports version "
+ "%x\n", FC_FCOE_DECAPS_VER(hp),
+ FC_FCOE_VER);
+ stats->ErrorFrames++;
kfree_skb(skb);
continue;
}
@@ -607,10 +515,8 @@
skb_pull(skb, sizeof(struct fcoe_hdr));
fr_len = skb->len - sizeof(struct fcoe_crc_eof);
- if (stats) {
- stats->RxFrames++;
- stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
- }
+ stats->RxFrames++;
+ stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
fp = (struct fc_frame *)skb;
fc_frame_init(fp);
@@ -885,9 +791,8 @@
if (new_link_up)
fc_linkup(lp);
else {
- stats = lp->dev_stats[smp_processor_id()];
- if (stats)
- stats->LinkFailureCount++;
+ stats = fc_lport_get_stats(lp);
+ stats->LinkFailureCount++;
fc_linkdown(lp);
fcoe_clean_pending_queue(lp);
}
@@ -1371,10 +1276,6 @@
INIT_LIST_HEAD(&fcoe_hostlist);
rwlock_init(&fcoe_hostlist_lock);
-#ifdef CONFIG_HOTPLUG_CPU
- register_cpu_notifier(&fcoe_cpu_notifier);
-#endif /* CONFIG_HOTPLUG_CPU */
-
for_each_possible_cpu(cpu) {
p = &per_cpu(fcoe_percpu, cpu);
skb_queue_head_init(&p->fcoe_rx_list);
@@ -1430,17 +1331,9 @@
struct fcoe_percpu_s *p;
struct sk_buff *skb;
- /*
- * Stop all call back interfaces
- */
-#ifdef CONFIG_HOTPLUG_CPU
- unregister_cpu_notifier(&fcoe_cpu_notifier);
-#endif /* CONFIG_HOTPLUG_CPU */
fcoe_dev_cleanup();
- /*
- * stop timer
- */
+ /* Stop the timer */
del_timer_sync(&fcoe_timer);
/* releases the associated fcoe transport for each lport */