[PATCH 0/2] IB multicast cleanup patches V2

[PATCH 0/2] IB multicast cleanup patches V2

[Christoph Lameter]

V1->V2
 - Add Reviewed by's for first patch from Ira Weiny
 - Change name of ipoib_check_mcast_sendonly() to
	ipoib_check_and_add_mcast_sendonly() as requested by Ira

This patchset cleans up the code a bit after the last round of multicast
patches related to the sendonly join logic. Some of the bits of code
landed in ipoib_main.c instead of ipoib_multicast.c.

- Move the multicastbits into that file so that everything is neatly together
- Reduce the number of functions exported from ipoib_multicast.c

This patchset can be retrieved from a git repo on kernel.org via

git pull git://git.kernel.org/pub/scm/linux/kernel/git/christoph/rdma.git cleanup

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[PATCH 1/2] Isolate common list remove code

[Christoph Lameter]

[-- Attachment #1: 0001-ipoib-mcast-sendonly-join-Isolate-common-list-remove.patch --]
[-- Type: text/plain, Size: 5207 bytes --]

Code cleanup to remove multicast specific code from ipoib_main.c

The removal of a list of multicast groups occurs in three places.
Create a new function ipoib_mcast_remove_list(). Use this new
function in ipoib_main.c too.
That in turn allows the dropping of two functions that were
exported from ipoib_multicast.c for expiration of mc groups.

Reviewed-by: Iraq Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Signed-off-by: Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/ulp/ipoib/ipoib.h           |  3 +--
 drivers/infiniband/ulp/ipoib/ipoib_main.c      |  7 ++-----
 drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 24 ++++++++++++++----------
 3 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
index 3ede103..989c409 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib.h
+++ b/drivers/infiniband/ulp/ipoib/ipoib.h
@@ -495,7 +495,6 @@ void ipoib_dev_cleanup(struct net_device *dev);
 void ipoib_mcast_join_task(struct work_struct *work);
 void ipoib_mcast_carrier_on_task(struct work_struct *work);
 void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb);
-void ipoib_mcast_free(struct ipoib_mcast *mc);
 
 void ipoib_mcast_restart_task(struct work_struct *work);
 int ipoib_mcast_start_thread(struct net_device *dev);
@@ -549,7 +548,7 @@ void ipoib_path_iter_read(struct ipoib_path_iter *iter,
 
 int ipoib_mcast_attach(struct net_device *dev, u16 mlid,
 		       union ib_gid *mgid, int set_qkey);
-int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast);
+void ipoib_mcast_remove_list(struct net_device *dev, struct list_head *remove_list);
 struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid);
 
 int ipoib_init_qp(struct net_device *dev);
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 7d32818..483ff20 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -1150,7 +1150,7 @@ static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv)
 	unsigned long flags;
 	int i;
 	LIST_HEAD(remove_list);
-	struct ipoib_mcast *mcast, *tmcast;
+	struct ipoib_mcast *mcast;
 	struct net_device *dev = priv->dev;
 
 	if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags))
@@ -1207,10 +1207,7 @@ static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv)
 
 out_unlock:
 	spin_unlock_irqrestore(&priv->lock, flags);
-	list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
-		ipoib_mcast_leave(dev, mcast);
-		ipoib_mcast_free(mcast);
-	}
+	ipoib_mcast_remove_list(dev, &remove_list);
 }
 
 static void ipoib_reap_neigh(struct work_struct *work)
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index f357ca6..8acb420a 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -106,7 +106,7 @@ static void __ipoib_mcast_schedule_join_thread(struct ipoib_dev_priv *priv,
 		queue_delayed_work(priv->wq, &priv->mcast_task, 0);
 }
 
-void ipoib_mcast_free(struct ipoib_mcast *mcast)
+static void ipoib_mcast_free(struct ipoib_mcast *mcast)
 {
 	struct net_device *dev = mcast->dev;
 	int tx_dropped = 0;
@@ -677,7 +677,7 @@ int ipoib_mcast_stop_thread(struct net_device *dev)
 	return 0;
 }
 
-int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
+static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	int ret = 0;
@@ -704,6 +704,16 @@ int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
 	return 0;
 }
 
+void ipoib_mcast_remove_list(struct net_device *dev, struct list_head *remove_list)
+{
+	struct ipoib_mcast *mcast, *tmcast;
+
+	list_for_each_entry_safe(mcast, tmcast, remove_list, list) {
+		ipoib_mcast_leave(dev, mcast);
+		ipoib_mcast_free(mcast);
+	}
+}
+
 void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
@@ -810,10 +820,7 @@ void ipoib_mcast_dev_flush(struct net_device *dev)
 		if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
 			wait_for_completion(&mcast->done);
 
-	list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
-		ipoib_mcast_leave(dev, mcast);
-		ipoib_mcast_free(mcast);
-	}
+	ipoib_mcast_remove_list(dev, &remove_list);
 }
 
 static int ipoib_mcast_addr_is_valid(const u8 *addr, const u8 *broadcast)
@@ -939,10 +946,7 @@ void ipoib_mcast_restart_task(struct work_struct *work)
 		if (test_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags))
 			wait_for_completion(&mcast->done);
 
-	list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
-		ipoib_mcast_leave(mcast->dev, mcast);
-		ipoib_mcast_free(mcast);
-	}
+	ipoib_mcast_remove_list(mcast->dev, &remove_list);
 
 	/*
 	 * Double check that we are still up
-- 
2.5.0


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[PATCH 2/2] Move multicast specific code out of ipoib_main.c

[Christoph Lameter]

[-- Attachment #1: 0002-Move-multicast-specific-code-out-of-ipoib_main.c.patch --]
[-- Type: text/plain, Size: 4240 bytes --]

V1->V2:
	- Rename function as requested by Ira

Code cleanup to move multicast specific code that checks for
a sendonly join to ipoib_multicast.c. This allows the removal
of the export of __ipoib_mcast_find().

Signed-off-by: Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>
---
 drivers/infiniband/ulp/ipoib/ipoib.h           |  3 ++-
 drivers/infiniband/ulp/ipoib/ipoib_main.c      | 13 +------------
 drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 21 ++++++++++++++++++++-
 3 files changed, 23 insertions(+), 14 deletions(-)

diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
index 989c409..a924933 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib.h
+++ b/drivers/infiniband/ulp/ipoib/ipoib.h
@@ -549,7 +549,8 @@ void ipoib_path_iter_read(struct ipoib_path_iter *iter,
 int ipoib_mcast_attach(struct net_device *dev, u16 mlid,
 		       union ib_gid *mgid, int set_qkey);
 void ipoib_mcast_remove_list(struct net_device *dev, struct list_head *remove_list);
-struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid);
+void ipoib_check_and_add_mcast_sendonly(struct ipoib_dev_priv *priv, u8 *mgid,
+				struct list_head *remove_list);
 
 int ipoib_init_qp(struct net_device *dev);
 int ipoib_transport_dev_init(struct net_device *dev, struct ib_device *ca);
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 483ff20..620d9ca 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -1150,7 +1150,6 @@ static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv)
 	unsigned long flags;
 	int i;
 	LIST_HEAD(remove_list);
-	struct ipoib_mcast *mcast;
 	struct net_device *dev = priv->dev;
 
 	if (test_bit(IPOIB_STOP_NEIGH_GC, &priv->flags))
@@ -1179,18 +1178,8 @@ static void __ipoib_reap_neigh(struct ipoib_dev_priv *priv)
 							  lockdep_is_held(&priv->lock))) != NULL) {
 			/* was the neigh idle for two GC periods */
 			if (time_after(neigh_obsolete, neigh->alive)) {
-				u8 *mgid = neigh->daddr + 4;
 
-				/* Is this multicast ? */
-				if (*mgid == 0xff) {
-					mcast = __ipoib_mcast_find(dev, mgid);
-
-					if (mcast && test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
-						list_del(&mcast->list);
-						rb_erase(&mcast->rb_node, &priv->multicast_tree);
-						list_add_tail(&mcast->list, &remove_list);
-					}
-				}
+				ipoib_check_and_add_mcast_sendonly(priv, neigh->daddr + 4, &remove_list);
 
 				rcu_assign_pointer(*np,
 						   rcu_dereference_protected(neigh->hnext,
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index 8acb420a..ab79b87 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -153,7 +153,7 @@ static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
 	return mcast;
 }
 
-struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid)
+static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid)
 {
 	struct ipoib_dev_priv *priv = netdev_priv(dev);
 	struct rb_node *n = priv->multicast_tree.rb_node;
@@ -704,6 +704,25 @@ static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
 	return 0;
 }
 
+/*
+ * Check if the multicast group is sendonly. If so remove it from the maps
+ * and add to the remove list
+ */
+void ipoib_check_and_add_mcast_sendonly(struct ipoib_dev_priv *priv, u8 *mgid,
+				struct list_head *remove_list)
+{
+	/* Is this multicast ? */
+	if (*mgid == 0xff) {
+		struct ipoib_mcast *mcast = __ipoib_mcast_find(priv->dev, mgid);
+
+		if (mcast && test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
+			list_del(&mcast->list);
+			rb_erase(&mcast->rb_node, &priv->multicast_tree);
+			list_add_tail(&mcast->list, remove_list);
+		}
+	}
+}
+
 void ipoib_mcast_remove_list(struct net_device *dev, struct list_head *remove_list)
 {
 	struct ipoib_mcast *mcast, *tmcast;
-- 
2.5.0


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Re: [PATCH 1/2] Isolate common list remove code

[Leon Romanovsky]

On Mon, Dec 21, 2015 at 08:42:53AM -0600, Christoph Lameter wrote:
> Code cleanup to remove multicast specific code from ipoib_main.c
> 
> The removal of a list of multicast groups occurs in three places.
> Create a new function ipoib_mcast_remove_list(). Use this new
> function in ipoib_main.c too.
> That in turn allows the dropping of two functions that were
> exported from ipoib_multicast.c for expiration of mc groups.
> 
> Reviewed-by: Iraq Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Iraq Weiny --> Ira Weiny

....
> +void ipoib_mcast_remove_list(struct net_device *dev, struct list_head *remove_list)
Will it be beneficial to inline this function?
> +{
> +	struct ipoib_mcast *mcast, *tmcast;
> +
> +	list_for_each_entry_safe(mcast, tmcast, remove_list, list) {
> +		ipoib_mcast_leave(dev, mcast);
> +		ipoib_mcast_free(mcast);
> +	}
> +}
> +
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Re: [PATCH 1/2] Isolate common list remove code

[Christoph Lameter]

On Mon, 21 Dec 2015, Leon Romanovsky wrote:

> On Mon, Dec 21, 2015 at 08:42:53AM -0600, Christoph Lameter wrote:
> > Code cleanup to remove multicast specific code from ipoib_main.c
> >
> > The removal of a list of multicast groups occurs in three places.
> > Create a new function ipoib_mcast_remove_list(). Use this new
> > function in ipoib_main.c too.
> > That in turn allows the dropping of two functions that were
> > exported from ipoib_multicast.c for expiration of mc groups.
> >
> > Reviewed-by: Iraq Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
> Iraq Weiny --> Ira Weiny

Ohh.. Bad typo.

> > +void ipoib_mcast_remove_list(struct net_device *dev, struct list_head *remove_list)
> Will it be beneficial to inline this function?

As far as I know it is not run in a latency critical context and the code
is too heavy for that. In particular we are calling other functions that
are not inlined.

> > +{
> > +	struct ipoib_mcast *mcast, *tmcast;
> > +
> > +	list_for_each_entry_safe(mcast, tmcast, remove_list, list) {
> > +		ipoib_mcast_leave(dev, mcast);
> > +		ipoib_mcast_free(mcast);
> > +	}
> > +}
> > +
>
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Re: [PATCH 0/2] IB multicast cleanup patches V2

[Doug Ledford]

[-- Attachment #1: Type: text/plain, Size: 910 bytes --]

On 12/21/2015 09:42 AM, Christoph Lameter wrote:
> V1->V2
>  - Add Reviewed by's for first patch from Ira Weiny
>  - Change name of ipoib_check_mcast_sendonly() to
> 	ipoib_check_and_add_mcast_sendonly() as requested by Ira
> 
> This patchset cleans up the code a bit after the last round of multicast
> patches related to the sendonly join logic. Some of the bits of code
> landed in ipoib_main.c instead of ipoib_multicast.c.
> 
> - Move the multicastbits into that file so that everything is neatly together
> - Reduce the number of functions exported from ipoib_multicast.c
> 
> This patchset can be retrieved from a git repo on kernel.org via
> 
> git pull git://git.kernel.org/pub/scm/linux/kernel/git/christoph/rdma.git cleanup
> 

Thanks, applied (with Ira's name fixed).

-- 
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
              GPG KeyID: 0E572FDD



[-- Attachment #2: OpenPGP digital signature --]
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Re: [PATCH 0/2] IB multicast cleanup patches V2

[ira.weiny]

On Wed, Dec 23, 2015 at 01:11:11PM -0500, Doug Ledford wrote:
> On 12/21/2015 09:42 AM, Christoph Lameter wrote:
> > V1->V2
> >  - Add Reviewed by's for first patch from Ira Weiny
> >  - Change name of ipoib_check_mcast_sendonly() to
> > 	ipoib_check_and_add_mcast_sendonly() as requested by Ira
> > 
> > This patchset cleans up the code a bit after the last round of multicast
> > patches related to the sendonly join logic. Some of the bits of code
> > landed in ipoib_main.c instead of ipoib_multicast.c.
> > 
> > - Move the multicastbits into that file so that everything is neatly together
> > - Reduce the number of functions exported from ipoib_multicast.c
> > 
> > This patchset can be retrieved from a git repo on kernel.org via
> > 
> > git pull git://git.kernel.org/pub/scm/linux/kernel/git/christoph/rdma.git cleanup
> > 
> 
> Thanks, applied (with Ira's name fixed).

Thanks!  :-D

Ira

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