From f175b46d9134f708358b5404730c6dfa200fbf3c Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 21 Jan 2026 01:08:44 +0100 Subject: [PATCH 1/4] netfilter: nf_tables: add .abort_skip_removal flag for set types The pipapo set backend is the only user of the .abort interface so far. To speed up pipapo abort path, removals are skipped. The follow up patch updates the rbtree to use to build an array of ordered elements, then use binary search. This needs a new .abort interface but, unlike pipapo, it also need to undo/remove elements. Add a flag and use it from the pipapo set backend. Signed-off-by: Pablo Neira Ayuso Signed-off-by: Florian Westphal --- include/net/netfilter/nf_tables.h | 2 ++ net/netfilter/nf_tables_api.c | 3 ++- net/netfilter/nft_set_pipapo.c | 2 ++ 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h index 2597077442e5..31906f90706e 100644 --- a/include/net/netfilter/nf_tables.h +++ b/include/net/netfilter/nf_tables.h @@ -451,6 +451,7 @@ struct nft_set_ext; * @init: initialize private data of new set instance * @destroy: destroy private data of set instance * @gc_init: initialize garbage collection + * @abort_skip_removal: skip removal of elements from abort path * @elemsize: element private size * * Operations lookup, update and delete have simpler interfaces, are faster @@ -508,6 +509,7 @@ struct nft_set_ops { const struct nft_set *set); void (*gc_init)(const struct nft_set *set); + bool abort_skip_removal; unsigned int elemsize; }; diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index e7247363c643..be4924aeaf0e 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -7807,7 +7807,8 @@ static bool nft_trans_elems_new_abort(const struct nft_ctx *ctx, continue; } - if (!te->set->ops->abort || nft_setelem_is_catchall(te->set, te->elems[i].priv)) + if (!te->set->ops->abort_skip_removal || + nft_setelem_is_catchall(te->set, te->elems[i].priv)) nft_setelem_remove(ctx->net, te->set, te->elems[i].priv); if (!nft_setelem_is_catchall(te->set, te->elems[i].priv)) diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c index 6d77a5f0088a..18e1903b1d3d 100644 --- a/net/netfilter/nft_set_pipapo.c +++ b/net/netfilter/nft_set_pipapo.c @@ -2370,6 +2370,7 @@ const struct nft_set_type nft_set_pipapo_type = { .gc_init = nft_pipapo_gc_init, .commit = nft_pipapo_commit, .abort = nft_pipapo_abort, + .abort_skip_removal = true, .elemsize = offsetof(struct nft_pipapo_elem, ext), }, }; @@ -2394,6 +2395,7 @@ const struct nft_set_type nft_set_pipapo_avx2_type = { .gc_init = nft_pipapo_gc_init, .commit = nft_pipapo_commit, .abort = nft_pipapo_abort, + .abort_skip_removal = true, .elemsize = offsetof(struct nft_pipapo_elem, ext), }, }; From 7e43e0a1141deec651a60109dab3690854107298 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 21 Jan 2026 01:08:45 +0100 Subject: [PATCH 2/4] netfilter: nft_set_rbtree: translate rbtree to array for binary search The rbtree can temporarily store overlapping inactive elements during the transaction processing, leading to false negative lookups. To address this issue, this patch adds a .commit function that walks the the rbtree to build a array of intervals of ordered elements. This conversion compacts the two singleton elements that represent the start and the end of the interval into a single interval object for space efficient. Binary search is O(log n), similar to rbtree lookup time, therefore, performance number should be similar, and there is an implementation available under lib/bsearch.c and include/linux/bsearch.h that is used for this purpose. This slightly increases memory consumption for this new array that stores pointers to the start and the end of the interval. With this patch: # time nft -f 100k-intervals-set.nft real 0m4.218s user 0m3.544s sys 0m0.400s Without this patch: # time nft -f 100k-intervals-set.nft real 0m3.920s user 0m3.547s sys 0m0.276s With this patch, with IPv4 intervals: baseline rbtree (match on first field only): 15254954pps Without this patch: baseline rbtree (match on first field only): 10256119pps This provides a ~50% improvement in matching intervals from packet path. Signed-off-by: Pablo Neira Ayuso Signed-off-by: Florian Westphal --- net/netfilter/nft_set_rbtree.c | 341 +++++++++++++++++++++++++-------- 1 file changed, 257 insertions(+), 84 deletions(-) diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c index ca594161b840..821808e8da06 100644 --- a/net/netfilter/nft_set_rbtree.c +++ b/net/netfilter/nft_set_rbtree.c @@ -10,14 +10,29 @@ #include #include #include +#include #include #include #include #include +struct nft_array_interval { + struct nft_set_ext *from; + struct nft_set_ext *to; +}; + +struct nft_array { + u32 max_intervals; + u32 num_intervals; + struct nft_array_interval *intervals; + struct rcu_head rcu_head; +}; + struct nft_rbtree { struct rb_root root; rwlock_t lock; + struct nft_array __rcu *array; + struct nft_array *array_next; seqcount_rwlock_t count; unsigned long last_gc; }; @@ -47,90 +62,6 @@ static int nft_rbtree_cmp(const struct nft_set *set, set->klen); } -static bool nft_rbtree_elem_expired(const struct nft_rbtree_elem *rbe) -{ - return nft_set_elem_expired(&rbe->ext); -} - -static const struct nft_set_ext * -__nft_rbtree_lookup(const struct net *net, const struct nft_set *set, - const u32 *key, unsigned int seq) -{ - struct nft_rbtree *priv = nft_set_priv(set); - const struct nft_rbtree_elem *rbe, *interval = NULL; - u8 genmask = nft_genmask_cur(net); - const struct rb_node *parent; - int d; - - parent = rcu_dereference_raw(priv->root.rb_node); - while (parent != NULL) { - if (read_seqcount_retry(&priv->count, seq)) - return NULL; - - rbe = rb_entry(parent, struct nft_rbtree_elem, node); - - d = memcmp(nft_set_ext_key(&rbe->ext), key, set->klen); - if (d < 0) { - parent = rcu_dereference_raw(parent->rb_left); - if (interval && - !nft_rbtree_cmp(set, rbe, interval) && - nft_rbtree_interval_end(rbe) && - nft_rbtree_interval_start(interval)) - continue; - if (nft_set_elem_active(&rbe->ext, genmask) && - !nft_rbtree_elem_expired(rbe)) - interval = rbe; - } else if (d > 0) - parent = rcu_dereference_raw(parent->rb_right); - else { - if (!nft_set_elem_active(&rbe->ext, genmask)) { - parent = rcu_dereference_raw(parent->rb_left); - continue; - } - - if (nft_rbtree_elem_expired(rbe)) - return NULL; - - if (nft_rbtree_interval_end(rbe)) { - if (nft_set_is_anonymous(set)) - return NULL; - parent = rcu_dereference_raw(parent->rb_left); - interval = NULL; - continue; - } - - return &rbe->ext; - } - } - - if (set->flags & NFT_SET_INTERVAL && interval != NULL && - nft_rbtree_interval_start(interval)) - return &interval->ext; - - return NULL; -} - -INDIRECT_CALLABLE_SCOPE -const struct nft_set_ext * -nft_rbtree_lookup(const struct net *net, const struct nft_set *set, - const u32 *key) -{ - struct nft_rbtree *priv = nft_set_priv(set); - unsigned int seq = read_seqcount_begin(&priv->count); - const struct nft_set_ext *ext; - - ext = __nft_rbtree_lookup(net, set, key, seq); - if (ext || !read_seqcount_retry(&priv->count, seq)) - return ext; - - read_lock_bh(&priv->lock); - seq = read_seqcount_begin(&priv->count); - ext = __nft_rbtree_lookup(net, set, key, seq); - read_unlock_bh(&priv->lock); - - return ext; -} - static bool __nft_rbtree_get(const struct net *net, const struct nft_set *set, const u32 *key, struct nft_rbtree_elem **elem, unsigned int seq, unsigned int flags, u8 genmask) @@ -221,6 +152,60 @@ nft_rbtree_get(const struct net *net, const struct nft_set *set, return &rbe->priv; } +struct nft_array_lookup_ctx { + const u32 *key; + u32 klen; +}; + +static int nft_array_lookup_cmp(const void *pkey, const void *entry) +{ + const struct nft_array_interval *interval = entry; + const struct nft_array_lookup_ctx *ctx = pkey; + int a, b; + + if (!interval->from) + return 1; + + a = memcmp(ctx->key, nft_set_ext_key(interval->from), ctx->klen); + if (!interval->to) + b = -1; + else + b = memcmp(ctx->key, nft_set_ext_key(interval->to), ctx->klen); + + if (a >= 0 && b < 0) + return 0; + + if (a < 0) + return -1; + + return 1; +} + +INDIRECT_CALLABLE_SCOPE +const struct nft_set_ext * +nft_rbtree_lookup(const struct net *net, const struct nft_set *set, + const u32 *key) +{ + struct nft_rbtree *priv = nft_set_priv(set); + struct nft_array *array = rcu_dereference(priv->array); + const struct nft_array_interval *interval; + struct nft_array_lookup_ctx ctx = { + .key = key, + .klen = set->klen, + }; + + if (!array) + return NULL; + + interval = bsearch(&ctx, array->intervals, array->num_intervals, + sizeof(struct nft_array_interval), + nft_array_lookup_cmp); + if (!interval || nft_set_elem_expired(interval->from)) + return NULL; + + return interval->from; +} + static void nft_rbtree_gc_elem_remove(struct net *net, struct nft_set *set, struct nft_rbtree *priv, struct nft_rbtree_elem *rbe) @@ -481,6 +466,87 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set, return 0; } +static int nft_array_intervals_alloc(struct nft_array *array, u32 max_intervals) +{ + struct nft_array_interval *intervals; + + intervals = kvcalloc(max_intervals, sizeof(struct nft_array_interval), + GFP_KERNEL_ACCOUNT); + if (!intervals) + return -ENOMEM; + + if (array->intervals) + kvfree(array->intervals); + + array->intervals = intervals; + array->max_intervals = max_intervals; + + return 0; +} + +static struct nft_array *nft_array_alloc(u32 max_intervals) +{ + struct nft_array *array; + + array = kzalloc(sizeof(*array), GFP_KERNEL_ACCOUNT); + if (!array) + return NULL; + + if (nft_array_intervals_alloc(array, max_intervals) < 0) { + kfree(array); + return NULL; + } + + return array; +} + +#define NFT_ARRAY_EXTRA_SIZE 10240 + +/* Similar to nft_rbtree_{u,k}size to hide details to userspace, but consider + * packed representation coming from userspace for anonymous sets too. + */ +static u32 nft_array_elems(const struct nft_set *set) +{ + u32 nelems = atomic_read(&set->nelems); + + /* Adjacent intervals are represented with a single start element in + * anonymous sets, use the current element counter as is. + */ + if (nft_set_is_anonymous(set)) + return nelems; + + /* Add extra room for never matching interval at the beginning and open + * interval at the end which only use a single element to represent it. + * The conversion to array will compact intervals, this allows reduce + * memory consumption. + */ + return (nelems / 2) + 2; +} + +static int nft_array_may_resize(const struct nft_set *set) +{ + u32 nelems = nft_array_elems(set), new_max_intervals; + struct nft_rbtree *priv = nft_set_priv(set); + struct nft_array *array; + + if (!priv->array_next) { + array = nft_array_alloc(nelems + NFT_ARRAY_EXTRA_SIZE); + if (!array) + return -ENOMEM; + + priv->array_next = array; + } + + if (nelems < priv->array_next->max_intervals) + return 0; + + new_max_intervals = priv->array_next->max_intervals + NFT_ARRAY_EXTRA_SIZE; + if (nft_array_intervals_alloc(priv->array_next, new_max_intervals) < 0) + return -ENOMEM; + + return 0; +} + static int nft_rbtree_insert(const struct net *net, const struct nft_set *set, const struct nft_set_elem *elem, struct nft_elem_priv **elem_priv) @@ -489,6 +555,9 @@ static int nft_rbtree_insert(const struct net *net, const struct nft_set *set, struct nft_rbtree *priv = nft_set_priv(set); int err; + if (nft_array_may_resize(set) < 0) + return -ENOMEM; + do { if (fatal_signal_pending(current)) return -EINTR; @@ -553,6 +622,9 @@ nft_rbtree_deactivate(const struct net *net, const struct nft_set *set, u64 tstamp = nft_net_tstamp(net); int d; + if (nft_array_may_resize(set) < 0) + return NULL; + while (parent != NULL) { rbe = rb_entry(parent, struct nft_rbtree_elem, node); @@ -615,6 +687,11 @@ static void nft_rbtree_walk(const struct nft_ctx *ctx, switch (iter->type) { case NFT_ITER_UPDATE: lockdep_assert_held(&nft_pernet(ctx->net)->commit_mutex); + + if (nft_array_may_resize(set) < 0) { + iter->err = -ENOMEM; + break; + } nft_rbtree_do_walk(ctx, set, iter); break; case NFT_ITER_READ: @@ -717,14 +794,24 @@ static int nft_rbtree_init(const struct nft_set *set, seqcount_rwlock_init(&priv->count, &priv->lock); priv->root = RB_ROOT; + priv->array = NULL; + priv->array_next = NULL; + return 0; } +static void __nft_array_free(struct nft_array *array) +{ + kvfree(array->intervals); + kfree(array); +} + static void nft_rbtree_destroy(const struct nft_ctx *ctx, const struct nft_set *set) { struct nft_rbtree *priv = nft_set_priv(set); struct nft_rbtree_elem *rbe; + struct nft_array *array; struct rb_node *node; while ((node = priv->root.rb_node) != NULL) { @@ -732,6 +819,12 @@ static void nft_rbtree_destroy(const struct nft_ctx *ctx, rbe = rb_entry(node, struct nft_rbtree_elem, node); nf_tables_set_elem_destroy(ctx, set, &rbe->priv); } + + array = rcu_dereference_protected(priv->array, true); + if (array) + __nft_array_free(array); + if (priv->array_next) + __nft_array_free(priv->array_next); } static bool nft_rbtree_estimate(const struct nft_set_desc *desc, u32 features, @@ -752,12 +845,91 @@ static bool nft_rbtree_estimate(const struct nft_set_desc *desc, u32 features, return true; } +static void nft_array_free_rcu(struct rcu_head *rcu_head) +{ + struct nft_array *array = container_of(rcu_head, struct nft_array, rcu_head); + + __nft_array_free(array); +} + static void nft_rbtree_commit(struct nft_set *set) { struct nft_rbtree *priv = nft_set_priv(set); + struct nft_rbtree_elem *rbe, *prev_rbe; + struct nft_array *old; + u32 num_intervals = 0; + struct rb_node *node; if (time_after_eq(jiffies, priv->last_gc + nft_set_gc_interval(set))) nft_rbtree_gc(set); + + /* No changes, skip, eg. elements updates only. */ + if (!priv->array_next) + return; + + /* Reverse walk to create an array from smaller to largest interval. */ + node = rb_last(&priv->root); + if (node) + prev_rbe = rb_entry(node, struct nft_rbtree_elem, node); + else + prev_rbe = NULL; + + while (prev_rbe) { + rbe = prev_rbe; + + if (nft_rbtree_interval_start(rbe)) + priv->array_next->intervals[num_intervals].from = &rbe->ext; + else if (nft_rbtree_interval_end(rbe)) + priv->array_next->intervals[num_intervals++].to = &rbe->ext; + + if (num_intervals >= priv->array_next->max_intervals) { + pr_warn_once("malformed interval set from userspace?"); + goto err_out; + } + + node = rb_prev(node); + if (!node) + break; + + prev_rbe = rb_entry(node, struct nft_rbtree_elem, node); + + /* For anonymous sets, when adjacent ranges are found, + * the end element is not added to the set to pack the set + * representation. Use next start element to complete this + * interval. + */ + if (nft_rbtree_interval_start(rbe) && + nft_rbtree_interval_start(prev_rbe) && + priv->array_next->intervals[num_intervals].from) + priv->array_next->intervals[num_intervals++].to = &prev_rbe->ext; + + if (num_intervals >= priv->array_next->max_intervals) { + pr_warn_once("malformed interval set from userspace?"); + goto err_out; + } + } + + if (priv->array_next->intervals[num_intervals].from) + num_intervals++; +err_out: + priv->array_next->num_intervals = num_intervals; + old = rcu_replace_pointer(priv->array, priv->array_next, true); + priv->array_next = NULL; + if (old) + call_rcu(&old->rcu_head, nft_array_free_rcu); +} + +static void nft_rbtree_abort(const struct nft_set *set) +{ + struct nft_rbtree *priv = nft_set_priv(set); + struct nft_array *array_next; + + if (!priv->array_next) + return; + + array_next = priv->array_next; + priv->array_next = NULL; + __nft_array_free(array_next); } static void nft_rbtree_gc_init(const struct nft_set *set) @@ -821,6 +993,7 @@ const struct nft_set_type nft_set_rbtree_type = { .flush = nft_rbtree_flush, .activate = nft_rbtree_activate, .commit = nft_rbtree_commit, + .abort = nft_rbtree_abort, .gc_init = nft_rbtree_gc_init, .lookup = nft_rbtree_lookup, .walk = nft_rbtree_walk, From 2aa34191f06fc5af4f70241518a8554370d86054 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 21 Jan 2026 01:08:46 +0100 Subject: [PATCH 3/4] netfilter: nft_set_rbtree: use binary search array in get command Rework .get interface to use the binary search array, this needs a specific lookup function to match on end intervals (<=). Packet path lookup is slight different because match is on lesser value, not equal (ie. <). After this patch, seqcount can be removed in a follow up patch. Signed-off-by: Pablo Neira Ayuso Signed-off-by: Florian Westphal --- net/netfilter/nft_set_rbtree.c | 154 ++++++++++++++------------------- 1 file changed, 64 insertions(+), 90 deletions(-) diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c index 821808e8da06..de2cce96023e 100644 --- a/net/netfilter/nft_set_rbtree.c +++ b/net/netfilter/nft_set_rbtree.c @@ -62,96 +62,6 @@ static int nft_rbtree_cmp(const struct nft_set *set, set->klen); } -static bool __nft_rbtree_get(const struct net *net, const struct nft_set *set, - const u32 *key, struct nft_rbtree_elem **elem, - unsigned int seq, unsigned int flags, u8 genmask) -{ - struct nft_rbtree_elem *rbe, *interval = NULL; - struct nft_rbtree *priv = nft_set_priv(set); - const struct rb_node *parent; - const void *this; - int d; - - parent = rcu_dereference_raw(priv->root.rb_node); - while (parent != NULL) { - if (read_seqcount_retry(&priv->count, seq)) - return false; - - rbe = rb_entry(parent, struct nft_rbtree_elem, node); - - this = nft_set_ext_key(&rbe->ext); - d = memcmp(this, key, set->klen); - if (d < 0) { - parent = rcu_dereference_raw(parent->rb_left); - if (!(flags & NFT_SET_ELEM_INTERVAL_END)) - interval = rbe; - } else if (d > 0) { - parent = rcu_dereference_raw(parent->rb_right); - if (flags & NFT_SET_ELEM_INTERVAL_END) - interval = rbe; - } else { - if (!nft_set_elem_active(&rbe->ext, genmask)) { - parent = rcu_dereference_raw(parent->rb_left); - continue; - } - - if (nft_set_elem_expired(&rbe->ext)) - return false; - - if (!nft_set_ext_exists(&rbe->ext, NFT_SET_EXT_FLAGS) || - (*nft_set_ext_flags(&rbe->ext) & NFT_SET_ELEM_INTERVAL_END) == - (flags & NFT_SET_ELEM_INTERVAL_END)) { - *elem = rbe; - return true; - } - - if (nft_rbtree_interval_end(rbe)) - interval = NULL; - - parent = rcu_dereference_raw(parent->rb_left); - } - } - - if (set->flags & NFT_SET_INTERVAL && interval != NULL && - nft_set_elem_active(&interval->ext, genmask) && - !nft_set_elem_expired(&interval->ext) && - ((!nft_rbtree_interval_end(interval) && - !(flags & NFT_SET_ELEM_INTERVAL_END)) || - (nft_rbtree_interval_end(interval) && - (flags & NFT_SET_ELEM_INTERVAL_END)))) { - *elem = interval; - return true; - } - - return false; -} - -static struct nft_elem_priv * -nft_rbtree_get(const struct net *net, const struct nft_set *set, - const struct nft_set_elem *elem, unsigned int flags) -{ - struct nft_rbtree *priv = nft_set_priv(set); - unsigned int seq = read_seqcount_begin(&priv->count); - struct nft_rbtree_elem *rbe = ERR_PTR(-ENOENT); - const u32 *key = (const u32 *)&elem->key.val; - u8 genmask = nft_genmask_cur(net); - bool ret; - - ret = __nft_rbtree_get(net, set, key, &rbe, seq, flags, genmask); - if (ret || !read_seqcount_retry(&priv->count, seq)) - return &rbe->priv; - - read_lock_bh(&priv->lock); - seq = read_seqcount_begin(&priv->count); - ret = __nft_rbtree_get(net, set, key, &rbe, seq, flags, genmask); - read_unlock_bh(&priv->lock); - - if (!ret) - return ERR_PTR(-ENOENT); - - return &rbe->priv; -} - struct nft_array_lookup_ctx { const u32 *key; u32 klen; @@ -206,6 +116,70 @@ nft_rbtree_lookup(const struct net *net, const struct nft_set *set, return interval->from; } +struct nft_array_get_ctx { + const u32 *key; + unsigned int flags; + u32 klen; +}; + +static int nft_array_get_cmp(const void *pkey, const void *entry) +{ + const struct nft_array_interval *interval = entry; + const struct nft_array_get_ctx *ctx = pkey; + int a, b; + + if (!interval->from) + return 1; + + a = memcmp(ctx->key, nft_set_ext_key(interval->from), ctx->klen); + if (!interval->to) + b = -1; + else + b = memcmp(ctx->key, nft_set_ext_key(interval->to), ctx->klen); + + if (a >= 0) { + if (ctx->flags & NFT_SET_ELEM_INTERVAL_END && b <= 0) + return 0; + else if (b < 0) + return 0; + } + + if (a < 0) + return -1; + + return 1; +} + +static struct nft_elem_priv * +nft_rbtree_get(const struct net *net, const struct nft_set *set, + const struct nft_set_elem *elem, unsigned int flags) +{ + struct nft_rbtree *priv = nft_set_priv(set); + struct nft_array *array = rcu_dereference(priv->array); + const struct nft_array_interval *interval; + struct nft_array_get_ctx ctx = { + .key = (const u32 *)&elem->key.val, + .flags = flags, + .klen = set->klen, + }; + struct nft_rbtree_elem *rbe; + + if (!array) + return ERR_PTR(-ENOENT); + + interval = bsearch(&ctx, array->intervals, array->num_intervals, + sizeof(struct nft_array_interval), nft_array_get_cmp); + if (!interval || nft_set_elem_expired(interval->from)) + return ERR_PTR(-ENOENT); + + if (flags & NFT_SET_ELEM_INTERVAL_END) + rbe = container_of(interval->to, struct nft_rbtree_elem, ext); + else + rbe = container_of(interval->from, struct nft_rbtree_elem, ext); + + return &rbe->priv; +} + static void nft_rbtree_gc_elem_remove(struct net *net, struct nft_set *set, struct nft_rbtree *priv, struct nft_rbtree_elem *rbe) From 5599fa810b503eafc2bd8cd15bd45f35fc8ff6b9 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 21 Jan 2026 01:08:47 +0100 Subject: [PATCH 4/4] netfilter: nft_set_rbtree: remove seqcount_rwlock_t After the conversion to binary search array, this is not required anymore. Remove it. Signed-off-by: Pablo Neira Ayuso Signed-off-by: Florian Westphal --- net/netfilter/nft_set_rbtree.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c index de2cce96023e..7598c368c4e5 100644 --- a/net/netfilter/nft_set_rbtree.c +++ b/net/netfilter/nft_set_rbtree.c @@ -33,7 +33,6 @@ struct nft_rbtree { rwlock_t lock; struct nft_array __rcu *array; struct nft_array *array_next; - seqcount_rwlock_t count; unsigned long last_gc; }; @@ -539,9 +538,7 @@ static int nft_rbtree_insert(const struct net *net, const struct nft_set *set, cond_resched(); write_lock_bh(&priv->lock); - write_seqcount_begin(&priv->count); err = __nft_rbtree_insert(net, set, rbe, elem_priv); - write_seqcount_end(&priv->count); write_unlock_bh(&priv->lock); } while (err == -EAGAIN); @@ -551,9 +548,7 @@ static int nft_rbtree_insert(const struct net *net, const struct nft_set *set, static void nft_rbtree_erase(struct nft_rbtree *priv, struct nft_rbtree_elem *rbe) { write_lock_bh(&priv->lock); - write_seqcount_begin(&priv->count); rb_erase(&rbe->node, &priv->root); - write_seqcount_end(&priv->count); write_unlock_bh(&priv->lock); } @@ -765,7 +760,6 @@ static int nft_rbtree_init(const struct nft_set *set, BUILD_BUG_ON(offsetof(struct nft_rbtree_elem, priv) != 0); rwlock_init(&priv->lock); - seqcount_rwlock_init(&priv->count, &priv->lock); priv->root = RB_ROOT; priv->array = NULL;