Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Cross-merge networking fixes after downstream PR (net-7.1-rc2).

No conflicts, or adjacent changes.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

9 files changed, 59 insertions, 8 deletions

diff --git a/include/linux/dpll.h b/include/linux/dpll.h
index b6f16c884b99..193abfb6ce66 100644
--- a/include/linux/dpll.h
+++ b/include/linux/dpll.h
@@ -292,6 +292,7 @@ int dpll_pin_ref_sync_pair_add(struct dpll_pin *pin,
 
 int dpll_device_change_ntf(struct dpll_device *dpll);
 
+int __dpll_pin_change_ntf(struct dpll_pin *pin);
 int dpll_pin_change_ntf(struct dpll_pin *pin);
 
 int register_dpll_notifier(struct notifier_block *nb);
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 95985400d3d8..e5cde39d6e85 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -915,6 +915,7 @@ extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group,
 					  unsigned int obj_type);
 extern void fsnotify_get_mark(struct fsnotify_mark *mark);
 extern void fsnotify_put_mark(struct fsnotify_mark *mark);
+struct fsnotify_mark *fsnotify_next_mark(struct fsnotify_mark *mark);
 extern void fsnotify_finish_user_wait(struct fsnotify_iter_info *iter_info);
 extern bool fsnotify_prepare_user_wait(struct fsnotify_iter_info *iter_info);
 
diff --git a/include/linux/mailbox_client.h b/include/linux/mailbox_client.h
index c6eea9afb943..e5997120f45c 100644
--- a/include/linux/mailbox_client.h
+++ b/include/linux/mailbox_client.h
@@ -45,6 +45,7 @@ int mbox_send_message(struct mbox_chan *chan, void *mssg);
 int mbox_flush(struct mbox_chan *chan, unsigned long timeout);
 void mbox_client_txdone(struct mbox_chan *chan, int r); /* atomic */
 bool mbox_client_peek_data(struct mbox_chan *chan); /* atomic */
+unsigned int mbox_chan_tx_slots_available(struct mbox_chan *chan); /* atomic */
 void mbox_free_channel(struct mbox_chan *chan); /* may sleep */
 
 #endif /* __MAILBOX_CLIENT_H */
diff --git a/include/linux/mailbox_controller.h b/include/linux/mailbox_controller.h
index 80a427c7ca29..dc93287a2a01 100644
--- a/include/linux/mailbox_controller.h
+++ b/include/linux/mailbox_controller.h
@@ -3,6 +3,7 @@
 #ifndef __MAILBOX_CONTROLLER_H
 #define __MAILBOX_CONTROLLER_H
 
+#include <linux/bits.h>
 #include <linux/completion.h>
 #include <linux/device.h>
 #include <linux/hrtimer.h>
@@ -11,6 +12,13 @@
 
 struct mbox_chan;
 
+/* Sentinel value distinguishing "no active request" from "NULL message data" */
+#define MBOX_NO_MSG	((void *)-1)
+
+#define MBOX_TXDONE_BY_IRQ	BIT(0) /* controller has remote RTR irq */
+#define MBOX_TXDONE_BY_POLL	BIT(1) /* controller can read status of last TX */
+#define MBOX_TXDONE_BY_ACK	BIT(2) /* S/W ACK received by Client ticks the TX */
+
 /**
  * struct mbox_chan_ops - methods to control mailbox channels
  * @send_data:	The API asks the MBOX controller driver, in atomic
@@ -54,10 +62,10 @@ struct mbox_chan_ops {
 
 /**
  * struct mbox_controller - Controller of a class of communication channels
- * @dev:		Device backing this controller
- * @ops:		Operators that work on each communication chan
- * @chans:		Array of channels
- * @num_chans:		Number of channels in the 'chans' array.
+ * @dev:		Device backing this controller. Required.
+ * @ops:		Operators that work on each communication chan. Required.
+ * @chans:		Array of channels. Required.
+ * @num_chans:		Number of channels in the 'chans' array. Required.
  * @txdone_irq:		Indicates if the controller can report to API when
  *			the last transmitted data was read by the remote.
  *			Eg, if it has some TX ACK irq.
@@ -70,6 +78,7 @@ struct mbox_chan_ops {
  * @of_xlate:		Controller driver specific mapping of channel via DT
  * @poll_hrt:		API private. hrtimer used to poll for TXDONE on all
  *			channels.
+ * @poll_hrt_lock:	API private. Lock protecting access to poll_hrt.
  * @node:		API private. To hook into list of controllers.
  */
 struct mbox_controller {
diff --git a/include/linux/mroute_base.h b/include/linux/mroute_base.h
index cf3374580f74..5d75cc5b057e 100644
--- a/include/linux/mroute_base.h
+++ b/include/linux/mroute_base.h
@@ -226,6 +226,7 @@ struct mr_table_ops {
 
 /**
  * struct mr_table - a multicast routing table
+ * @work: used for table destruction
  * @list: entry within a list of multicast routing tables
  * @net: net where this table belongs
  * @ops: protocol specific operations
@@ -243,6 +244,7 @@ struct mr_table_ops {
  * @mroute_reg_vif_num: PIM-device vif index
  */
 struct mr_table {
+	struct rcu_work		work;
 	struct list_head	list;
 	possible_net_t		net;
 	struct mr_table_ops	ops;
@@ -274,6 +276,7 @@ void vif_device_init(struct vif_device *v,
 		     unsigned short flags,
 		     unsigned short get_iflink_mask);
 
+void mr_table_free(struct mr_table *mrt);
 struct mr_table *
 mr_table_alloc(struct net *net, u32 id,
 	       struct mr_table_ops *ops,
diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index 2abba7552605..e3bc44225692 100644
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -261,6 +261,35 @@ static inline void list_replace_rcu(struct list_head *old,
 	old->prev = LIST_POISON2;
 }
 
+static inline void __list_splice_rcu(struct list_head *list,
+				     struct list_head *prev,
+				     struct list_head *next)
+{
+	struct list_head *first = list->next;
+	struct list_head *last = list->prev;
+
+	last->next = next;
+	first->prev = prev;
+	next->prev = last;
+	rcu_assign_pointer(list_next_rcu(prev), first);
+}
+
+/**
+ * list_splice_rcu - splice a non-RCU list into an RCU-protected list,
+ *                   designed for stacks.
+ * @list:	the non RCU-protected list to splice
+ * @head:	the place in the existing RCU-protected list to splice
+ *
+ * The list pointed to by @head can be RCU-read traversed concurrently with
+ * this function.
+ */
+static inline void list_splice_rcu(struct list_head *list,
+				   struct list_head *head)
+{
+	if (!list_empty(list))
+		__list_splice_rcu(list, head, head->next);
+}
+
 /**
  * __list_splice_init_rcu - join an RCU-protected list into an existing list.
  * @list:	the RCU-protected list to splice
diff --git a/include/linux/rhashtable-types.h b/include/linux/rhashtable-types.h
index 015c8298bebc..fc2f596a6df1 100644
--- a/include/linux/rhashtable-types.h
+++ b/include/linux/rhashtable-types.h
@@ -12,6 +12,7 @@
 #include <linux/alloc_tag.h>
 #include <linux/atomic.h>
 #include <linux/compiler.h>
+#include <linux/irq_work_types.h>
 #include <linux/mutex.h>
 #include <linux/workqueue_types.h>
 
@@ -49,6 +50,7 @@ typedef int (*rht_obj_cmpfn_t)(struct rhashtable_compare_arg *arg,
  * @head_offset: Offset of rhash_head in struct to be hashed
  * @max_size: Maximum size while expanding
  * @min_size: Minimum size while shrinking
+ * @insecure_elasticity: Set to true to disable chain length checks
  * @automatic_shrinking: Enable automatic shrinking of tables
  * @hashfn: Hash function (default: jhash2 if !(key_len % 4), or jhash)
  * @obj_hashfn: Function to hash object
@@ -61,6 +63,7 @@ struct rhashtable_params {
 	u16			head_offset;
 	unsigned int		max_size;
 	u16			min_size;
+	bool			insecure_elasticity;
 	bool			automatic_shrinking;
 	rht_hashfn_t		hashfn;
 	rht_obj_hashfn_t	obj_hashfn;
@@ -75,6 +78,7 @@ struct rhashtable_params {
  * @p: Configuration parameters
  * @rhlist: True if this is an rhltable
  * @run_work: Deferred worker to expand/shrink asynchronously
+ * @run_irq_work: Bounces the @run_work kick through hard IRQ context.
  * @mutex: Mutex to protect current/future table swapping
  * @lock: Spin lock to protect walker list
  * @nelems: Number of elements in table
@@ -86,6 +90,7 @@ struct rhashtable {
 	struct rhashtable_params	p;
 	bool				rhlist;
 	struct work_struct		run_work;
+	struct irq_work			run_irq_work;
 	struct mutex                    mutex;
 	spinlock_t			lock;
 	atomic_t			nelems;
diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h
index 0480509a6339..ef5230cece36 100644
--- a/include/linux/rhashtable.h
+++ b/include/linux/rhashtable.h
@@ -20,6 +20,7 @@
 
 #include <linux/err.h>
 #include <linux/errno.h>
+#include <linux/irq_work.h>
 #include <linux/jhash.h>
 #include <linux/list_nulls.h>
 #include <linux/workqueue.h>
@@ -821,14 +822,15 @@ slow_path:
 		goto out;
 	}
 
-	if (elasticity <= 0)
+	if (elasticity <= 0 && !params.insecure_elasticity)
 		goto slow_path;
 
 	data = ERR_PTR(-E2BIG);
 	if (unlikely(rht_grow_above_max(ht, tbl)))
 		goto out_unlock;
 
-	if (unlikely(rht_grow_above_100(ht, tbl)))
+	if (unlikely(rht_grow_above_100(ht, tbl)) &&
+	    !params.insecure_elasticity)
 		goto slow_path;
 
 	/* Inserting at head of list makes unlocking free. */
@@ -846,7 +848,7 @@ slow_path:
 	rht_assign_unlock(tbl, bkt, obj, flags);
 
 	if (rht_grow_above_75(ht, tbl))
-		schedule_work(&ht->run_work);
+		irq_work_queue(&ht->run_irq_work);
 
 	data = NULL;
 out:
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 578e520b6ee6..763eea4d80d8 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -202,7 +202,7 @@ static inline struct tracepoint *tracepoint_ptr_deref(tracepoint_ptr_t *p)
 #define TP_CONDITION(args...)	args
 
 /*
- * Individual subsystem my have a separate configuration to
+ * Individual subsystem may have a separate configuration to
  * enable their tracepoints. By default, this file will create
  * the tracepoints if CONFIG_TRACEPOINTS is defined. If a subsystem
  * wants to be able to disable its tracepoints from being created