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Date: Mon, 18 Jun 2018 12:52:50 +1000
From: NeilBrown <neilb@...e.com>
To: Thomas Graf <tgraf@...g.ch>,
Herbert Xu <herbert@...dor.apana.org.au>,
David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/7] rhashtable: split rhashtable.h
Due to the use of rhashtables in net namespaces,
rhashtable.h is included in lots of the kernel,
so a small changes can required a large recompilation.
This makes development painful.
This patch splits out rhashtable-types.h which just includes
the major type declarations, and does not include (non-trivial)
inline code. rhashtable.h is no longer included by anything
in the include/ directory.
Common include files only include rhashtable-types.h so a large
recompilation is only triggered when that changes.
Acked-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: NeilBrown <neilb@...e.com>
---
MAINTAINERS | 2
drivers/net/ethernet/chelsio/cxgb4/cxgb4.h | 1
include/linux/ipc.h | 2
include/linux/ipc_namespace.h | 2
include/linux/mroute_base.h | 2
include/linux/rhashtable-types.h | 139 ++++++++++++++++++++++++++++
include/linux/rhashtable.h | 127 --------------------------
include/net/inet_frag.h | 2
include/net/netfilter/nf_flow_table.h | 2
include/net/sctp/structs.h | 2
include/net/seg6.h | 2
include/net/seg6_hmac.h | 2
ipc/msg.c | 1
ipc/sem.c | 1
ipc/shm.c | 1
ipc/util.c | 1
lib/rhashtable.c | 1
net/ipv4/inet_fragment.c | 1
net/ipv4/ipmr.c | 1
net/ipv4/ipmr_base.c | 1
net/ipv6/ip6mr.c | 1
net/ipv6/seg6.c | 1
net/ipv6/seg6_hmac.c | 1
net/netfilter/nf_tables_api.c | 1
net/sctp/input.c | 1
net/sctp/socket.c | 1
26 files changed, 166 insertions(+), 133 deletions(-)
create mode 100644 include/linux/rhashtable-types.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 9d5eeff51b5f..5b57d9078d79 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12162,7 +12162,9 @@ M: Herbert Xu <herbert@...dor.apana.org.au>
L: netdev@...r.kernel.org
S: Maintained
F: lib/rhashtable.c
+F: lib/test_rhashtable.c
F: include/linux/rhashtable.h
+F: include/linux/rhashtable-types.h
RICOH R5C592 MEMORYSTICK DRIVER
M: Maxim Levitsky <maximlevitsky@...il.com>
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
index 0dbe2d9e22d6..1adb968b8354 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4.h
@@ -46,6 +46,7 @@
#include <linux/spinlock.h>
#include <linux/timer.h>
#include <linux/vmalloc.h>
+#include <linux/rhashtable.h>
#include <linux/etherdevice.h>
#include <linux/net_tstamp.h>
#include <linux/ptp_clock_kernel.h>
diff --git a/include/linux/ipc.h b/include/linux/ipc.h
index 6cc2df7f7ac9..e1c9eea6015b 100644
--- a/include/linux/ipc.h
+++ b/include/linux/ipc.h
@@ -4,7 +4,7 @@
#include <linux/spinlock.h>
#include <linux/uidgid.h>
-#include <linux/rhashtable.h>
+#include <linux/rhashtable-types.h>
#include <uapi/linux/ipc.h>
#include <linux/refcount.h>
diff --git a/include/linux/ipc_namespace.h b/include/linux/ipc_namespace.h
index b5630c8eb2f3..6cea726612b7 100644
--- a/include/linux/ipc_namespace.h
+++ b/include/linux/ipc_namespace.h
@@ -9,7 +9,7 @@
#include <linux/nsproxy.h>
#include <linux/ns_common.h>
#include <linux/refcount.h>
-#include <linux/rhashtable.h>
+#include <linux/rhashtable-types.h>
struct user_namespace;
diff --git a/include/linux/mroute_base.h b/include/linux/mroute_base.h
index d633f737b3c6..fd436cdd4725 100644
--- a/include/linux/mroute_base.h
+++ b/include/linux/mroute_base.h
@@ -2,7 +2,7 @@
#define __LINUX_MROUTE_BASE_H
#include <linux/netdevice.h>
-#include <linux/rhashtable.h>
+#include <linux/rhashtable-types.h>
#include <linux/spinlock.h>
#include <net/net_namespace.h>
#include <net/sock.h>
diff --git a/include/linux/rhashtable-types.h b/include/linux/rhashtable-types.h
new file mode 100644
index 000000000000..9740063ff13b
--- /dev/null
+++ b/include/linux/rhashtable-types.h
@@ -0,0 +1,139 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Resizable, Scalable, Concurrent Hash Table
+ *
+ * Simple structures that might be needed in include
+ * files.
+ */
+
+#ifndef _LINUX_RHASHTABLE_TYPES_H
+#define _LINUX_RHASHTABLE_TYPES_H
+
+#include <linux/atomic.h>
+#include <linux/compiler.h>
+#include <linux/mutex.h>
+#include <linux/workqueue.h>
+
+struct rhash_head {
+ struct rhash_head __rcu *next;
+};
+
+struct rhlist_head {
+ struct rhash_head rhead;
+ struct rhlist_head __rcu *next;
+};
+
+struct bucket_table;
+
+/**
+ * struct rhashtable_compare_arg - Key for the function rhashtable_compare
+ * @ht: Hash table
+ * @key: Key to compare against
+ */
+struct rhashtable_compare_arg {
+ struct rhashtable *ht;
+ const void *key;
+};
+
+typedef u32 (*rht_hashfn_t)(const void *data, u32 len, u32 seed);
+typedef u32 (*rht_obj_hashfn_t)(const void *data, u32 len, u32 seed);
+typedef int (*rht_obj_cmpfn_t)(struct rhashtable_compare_arg *arg,
+ const void *obj);
+
+/**
+ * struct rhashtable_params - Hash table construction parameters
+ * @nelem_hint: Hint on number of elements, should be 75% of desired size
+ * @key_len: Length of key
+ * @key_offset: Offset of key in struct to be hashed
+ * @head_offset: Offset of rhash_head in struct to be hashed
+ * @max_size: Maximum size while expanding
+ * @min_size: Minimum size while shrinking
+ * @locks_mul: Number of bucket locks to allocate per cpu (default: 32)
+ * @automatic_shrinking: Enable automatic shrinking of tables
+ * @nulls_base: Base value to generate nulls marker
+ * @hashfn: Hash function (default: jhash2 if !(key_len % 4), or jhash)
+ * @obj_hashfn: Function to hash object
+ * @obj_cmpfn: Function to compare key with object
+ */
+struct rhashtable_params {
+ u16 nelem_hint;
+ u16 key_len;
+ u16 key_offset;
+ u16 head_offset;
+ unsigned int max_size;
+ u16 min_size;
+ bool automatic_shrinking;
+ u8 locks_mul;
+ u32 nulls_base;
+ rht_hashfn_t hashfn;
+ rht_obj_hashfn_t obj_hashfn;
+ rht_obj_cmpfn_t obj_cmpfn;
+};
+
+/**
+ * struct rhashtable - Hash table handle
+ * @tbl: Bucket table
+ * @key_len: Key length for hashfn
+ * @max_elems: Maximum number of elements in table
+ * @p: Configuration parameters
+ * @rhlist: True if this is an rhltable
+ * @run_work: Deferred worker to expand/shrink asynchronously
+ * @mutex: Mutex to protect current/future table swapping
+ * @lock: Spin lock to protect walker list
+ * @nelems: Number of elements in table
+ */
+struct rhashtable {
+ struct bucket_table __rcu *tbl;
+ unsigned int key_len;
+ unsigned int max_elems;
+ struct rhashtable_params p;
+ bool rhlist;
+ struct work_struct run_work;
+ struct mutex mutex;
+ spinlock_t lock;
+ atomic_t nelems;
+};
+
+/**
+ * struct rhltable - Hash table with duplicate objects in a list
+ * @ht: Underlying rhtable
+ */
+struct rhltable {
+ struct rhashtable ht;
+};
+
+/**
+ * struct rhashtable_walker - Hash table walker
+ * @list: List entry on list of walkers
+ * @tbl: The table that we were walking over
+ */
+struct rhashtable_walker {
+ struct list_head list;
+ struct bucket_table *tbl;
+};
+
+/**
+ * struct rhashtable_iter - Hash table iterator
+ * @ht: Table to iterate through
+ * @p: Current pointer
+ * @list: Current hash list pointer
+ * @walker: Associated rhashtable walker
+ * @slot: Current slot
+ * @skip: Number of entries to skip in slot
+ */
+struct rhashtable_iter {
+ struct rhashtable *ht;
+ struct rhash_head *p;
+ struct rhlist_head *list;
+ struct rhashtable_walker walker;
+ unsigned int slot;
+ unsigned int skip;
+ bool end_of_table;
+};
+
+int rhashtable_init(struct rhashtable *ht,
+ const struct rhashtable_params *params);
+int rhltable_init(struct rhltable *hlt,
+ const struct rhashtable_params *params);
+
+#endif /* _LINUX_RHASHTABLE_TYPES_H */
diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h
index 4e1f535c2034..48754ab07cdf 100644
--- a/include/linux/rhashtable.h
+++ b/include/linux/rhashtable.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Resizable, Scalable, Concurrent Hash Table
*
@@ -17,16 +18,14 @@
#ifndef _LINUX_RHASHTABLE_H
#define _LINUX_RHASHTABLE_H
-#include <linux/atomic.h>
-#include <linux/compiler.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/jhash.h>
#include <linux/list_nulls.h>
#include <linux/workqueue.h>
-#include <linux/mutex.h>
#include <linux/rculist.h>
+#include <linux/rhashtable-types.h>
/*
* The end of the chain is marked with a special nulls marks which has
* the following format:
@@ -64,15 +63,6 @@
*/
#define RHT_ELASTICITY 16u
-struct rhash_head {
- struct rhash_head __rcu *next;
-};
-
-struct rhlist_head {
- struct rhash_head rhead;
- struct rhlist_head __rcu *next;
-};
-
/**
* struct bucket_table - Table of hash buckets
* @size: Number of hash buckets
@@ -102,114 +92,6 @@ struct bucket_table {
struct rhash_head __rcu *buckets[] ____cacheline_aligned_in_smp;
};
-/**
- * struct rhashtable_compare_arg - Key for the function rhashtable_compare
- * @ht: Hash table
- * @key: Key to compare against
- */
-struct rhashtable_compare_arg {
- struct rhashtable *ht;
- const void *key;
-};
-
-typedef u32 (*rht_hashfn_t)(const void *data, u32 len, u32 seed);
-typedef u32 (*rht_obj_hashfn_t)(const void *data, u32 len, u32 seed);
-typedef int (*rht_obj_cmpfn_t)(struct rhashtable_compare_arg *arg,
- const void *obj);
-
-struct rhashtable;
-
-/**
- * struct rhashtable_params - Hash table construction parameters
- * @nelem_hint: Hint on number of elements, should be 75% of desired size
- * @key_len: Length of key
- * @key_offset: Offset of key in struct to be hashed
- * @head_offset: Offset of rhash_head in struct to be hashed
- * @max_size: Maximum size while expanding
- * @min_size: Minimum size while shrinking
- * @locks_mul: Number of bucket locks to allocate per cpu (default: 32)
- * @automatic_shrinking: Enable automatic shrinking of tables
- * @nulls_base: Base value to generate nulls marker
- * @hashfn: Hash function (default: jhash2 if !(key_len % 4), or jhash)
- * @obj_hashfn: Function to hash object
- * @obj_cmpfn: Function to compare key with object
- */
-struct rhashtable_params {
- u16 nelem_hint;
- u16 key_len;
- u16 key_offset;
- u16 head_offset;
- unsigned int max_size;
- u16 min_size;
- bool automatic_shrinking;
- u8 locks_mul;
- u32 nulls_base;
- rht_hashfn_t hashfn;
- rht_obj_hashfn_t obj_hashfn;
- rht_obj_cmpfn_t obj_cmpfn;
-};
-
-/**
- * struct rhashtable - Hash table handle
- * @tbl: Bucket table
- * @key_len: Key length for hashfn
- * @max_elems: Maximum number of elements in table
- * @p: Configuration parameters
- * @rhlist: True if this is an rhltable
- * @run_work: Deferred worker to expand/shrink asynchronously
- * @mutex: Mutex to protect current/future table swapping
- * @lock: Spin lock to protect walker list
- * @nelems: Number of elements in table
- */
-struct rhashtable {
- struct bucket_table __rcu *tbl;
- unsigned int key_len;
- unsigned int max_elems;
- struct rhashtable_params p;
- bool rhlist;
- struct work_struct run_work;
- struct mutex mutex;
- spinlock_t lock;
- atomic_t nelems;
-};
-
-/**
- * struct rhltable - Hash table with duplicate objects in a list
- * @ht: Underlying rhtable
- */
-struct rhltable {
- struct rhashtable ht;
-};
-
-/**
- * struct rhashtable_walker - Hash table walker
- * @list: List entry on list of walkers
- * @tbl: The table that we were walking over
- */
-struct rhashtable_walker {
- struct list_head list;
- struct bucket_table *tbl;
-};
-
-/**
- * struct rhashtable_iter - Hash table iterator
- * @ht: Table to iterate through
- * @p: Current pointer
- * @list: Current hash list pointer
- * @walker: Associated rhashtable walker
- * @slot: Current slot
- * @skip: Number of entries to skip in slot
- */
-struct rhashtable_iter {
- struct rhashtable *ht;
- struct rhash_head *p;
- struct rhlist_head *list;
- struct rhashtable_walker walker;
- unsigned int slot;
- unsigned int skip;
- bool end_of_table;
-};
-
static inline unsigned long rht_marker(const struct rhashtable *ht, u32 hash)
{
return NULLS_MARKER(ht->p.nulls_base + hash);
@@ -376,11 +258,6 @@ static inline int lockdep_rht_bucket_is_held(const struct bucket_table *tbl,
}
#endif /* CONFIG_PROVE_LOCKING */
-int rhashtable_init(struct rhashtable *ht,
- const struct rhashtable_params *params);
-int rhltable_init(struct rhltable *hlt,
- const struct rhashtable_params *params);
-
void *rhashtable_insert_slow(struct rhashtable *ht, const void *key,
struct rhash_head *obj);
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
index ed07e3786d98..f4272a29dc44 100644
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -2,7 +2,7 @@
#ifndef __NET_FRAG_H__
#define __NET_FRAG_H__
-#include <linux/rhashtable.h>
+#include <linux/rhashtable-types.h>
struct netns_frags {
/* sysctls */
diff --git a/include/net/netfilter/nf_flow_table.h b/include/net/netfilter/nf_flow_table.h
index ba9fa4592f2b..0e355f4a3d76 100644
--- a/include/net/netfilter/nf_flow_table.h
+++ b/include/net/netfilter/nf_flow_table.h
@@ -4,7 +4,7 @@
#include <linux/in.h>
#include <linux/in6.h>
#include <linux/netdevice.h>
-#include <linux/rhashtable.h>
+#include <linux/rhashtable-types.h>
#include <linux/rcupdate.h>
#include <linux/netfilter/nf_conntrack_tuple_common.h>
#include <net/dst.h>
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index dbe1b911a24d..e0f962d27386 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -48,7 +48,7 @@
#define __sctp_structs_h__
#include <linux/ktime.h>
-#include <linux/rhashtable.h>
+#include <linux/rhashtable-types.h>
#include <linux/socket.h> /* linux/in.h needs this!! */
#include <linux/in.h> /* We get struct sockaddr_in. */
#include <linux/in6.h> /* We get struct in6_addr */
diff --git a/include/net/seg6.h b/include/net/seg6.h
index e029e301faa5..2567941a2f32 100644
--- a/include/net/seg6.h
+++ b/include/net/seg6.h
@@ -18,7 +18,7 @@
#include <linux/ipv6.h>
#include <net/lwtunnel.h>
#include <linux/seg6.h>
-#include <linux/rhashtable.h>
+#include <linux/rhashtable-types.h>
static inline void update_csum_diff4(struct sk_buff *skb, __be32 from,
__be32 to)
diff --git a/include/net/seg6_hmac.h b/include/net/seg6_hmac.h
index 69c3a106056b..7fda469e2758 100644
--- a/include/net/seg6_hmac.h
+++ b/include/net/seg6_hmac.h
@@ -22,7 +22,7 @@
#include <linux/route.h>
#include <net/seg6.h>
#include <linux/seg6_hmac.h>
-#include <linux/rhashtable.h>
+#include <linux/rhashtable-types.h>
#define SEG6_HMAC_MAX_DIGESTSIZE 160
#define SEG6_HMAC_RING_SIZE 256
diff --git a/ipc/msg.c b/ipc/msg.c
index 3b6545302598..203281198079 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -38,6 +38,7 @@
#include <linux/rwsem.h>
#include <linux/nsproxy.h>
#include <linux/ipc_namespace.h>
+#include <linux/rhashtable.h>
#include <asm/current.h>
#include <linux/uaccess.h>
diff --git a/ipc/sem.c b/ipc/sem.c
index 5af1943ad782..29c0347ef11d 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -86,6 +86,7 @@
#include <linux/ipc_namespace.h>
#include <linux/sched/wake_q.h>
#include <linux/nospec.h>
+#include <linux/rhashtable.h>
#include <linux/uaccess.h>
#include "util.h"
diff --git a/ipc/shm.c b/ipc/shm.c
index 051a3e1fb8df..d4daf78df6da 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -43,6 +43,7 @@
#include <linux/nsproxy.h>
#include <linux/mount.h>
#include <linux/ipc_namespace.h>
+#include <linux/rhashtable.h>
#include <linux/uaccess.h>
diff --git a/ipc/util.c b/ipc/util.c
index 4e81182fa0ac..fdffff41f65b 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -63,6 +63,7 @@
#include <linux/rwsem.h>
#include <linux/memory.h>
#include <linux/ipc_namespace.h>
+#include <linux/rhashtable.h>
#include <asm/unistd.h>
diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index 9427b5766134..c9fafea7dc6e 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -28,6 +28,7 @@
#include <linux/rhashtable.h>
#include <linux/err.h>
#include <linux/export.h>
+#include <linux/rhashtable.h>
#define HASH_DEFAULT_SIZE 64UL
#define HASH_MIN_SIZE 4U
diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c
index c9e35b81d093..316518f87294 100644
--- a/net/ipv4/inet_fragment.c
+++ b/net/ipv4/inet_fragment.c
@@ -20,6 +20,7 @@
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
+#include <linux/rhashtable.h>
#include <net/sock.h>
#include <net/inet_frag.h>
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 9f79b9803a16..82f914122f1b 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -60,6 +60,7 @@
#include <linux/netfilter_ipv4.h>
#include <linux/compat.h>
#include <linux/export.h>
+#include <linux/rhashtable.h>
#include <net/ip_tunnels.h>
#include <net/checksum.h>
#include <net/netlink.h>
diff --git a/net/ipv4/ipmr_base.c b/net/ipv4/ipmr_base.c
index cafb0506c8c9..1ad9aa62a97b 100644
--- a/net/ipv4/ipmr_base.c
+++ b/net/ipv4/ipmr_base.c
@@ -2,6 +2,7 @@
* Common logic shared by IPv4 [ipmr] and IPv6 [ip6mr] implementation
*/
+#include <linux/rhashtable.h>
#include <linux/mroute_base.h>
/* Sets everything common except 'dev', since that is done under locking */
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 0d0f0053bb11..d0b7e0249c13 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -32,6 +32,7 @@
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/compat.h>
+#include <linux/rhashtable.h>
#include <net/protocol.h>
#include <linux/skbuff.h>
#include <net/raw.h>
diff --git a/net/ipv6/seg6.c b/net/ipv6/seg6.c
index 0fdf2a55e746..8d0ba757a46c 100644
--- a/net/ipv6/seg6.c
+++ b/net/ipv6/seg6.c
@@ -17,6 +17,7 @@
#include <linux/net.h>
#include <linux/in6.h>
#include <linux/slab.h>
+#include <linux/rhashtable.h>
#include <net/ipv6.h>
#include <net/protocol.h>
diff --git a/net/ipv6/seg6_hmac.c b/net/ipv6/seg6_hmac.c
index 33fb35cbfac1..b1791129a875 100644
--- a/net/ipv6/seg6_hmac.c
+++ b/net/ipv6/seg6_hmac.c
@@ -22,6 +22,7 @@
#include <linux/icmpv6.h>
#include <linux/mroute6.h>
#include <linux/slab.h>
+#include <linux/rhashtable.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 896d4a36081d..3f211e1025c1 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -14,6 +14,7 @@
#include <linux/skbuff.h>
#include <linux/netlink.h>
#include <linux/vmalloc.h>
+#include <linux/rhashtable.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nf_tables.h>
diff --git a/net/sctp/input.c b/net/sctp/input.c
index ba8a6e6c36fa..9bbc5f92c941 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -56,6 +56,7 @@
#include <net/sctp/sm.h>
#include <net/sctp/checksum.h>
#include <net/net_namespace.h>
+#include <linux/rhashtable.h>
/* Forward declarations for internal helpers. */
static int sctp_rcv_ootb(struct sk_buff *);
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index d20f7addee19..0e91e83eea5a 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -66,6 +66,7 @@
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/compat.h>
+#include <linux/rhashtable.h>
#include <net/ip.h>
#include <net/icmp.h>
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