| Message ID | 20190226014346.77719-1-posk@google.com |
|---|---|
| State | Accepted |
| Delegated to: | David Miller |
| Headers | show |
| Series | [net-next] net: remove unused struct inet_frag_queue.fragments field | expand |
Hello Peter. On 26.02.19 02:43, Peter Oskolkov wrote: > Now that all users of struct inet_frag_queue have been converted > to use 'rb_fragments', remove the unused 'fragments' field. > > Build with `make allyesconfig` succeeded. ip_defrag selftest passed. > > Signed-off-by: Peter Oskolkov <posk@google.com> > --- > include/net/inet_frag.h | 4 +-- > net/ieee802154/6lowpan/reassembly.c | 1 - > net/ipv4/inet_fragment.c | 44 ++++++++----------------- > net/ipv4/ip_fragment.c | 2 -- > net/ipv6/netfilter/nf_conntrack_reasm.c | 1 - > net/ipv6/reassembly.c | 1 - > 6 files changed, 14 insertions(+), 39 deletions(-) > > diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h > index b02bf737d019..378904ee9129 100644 > --- a/include/net/inet_frag.h > +++ b/include/net/inet_frag.h > @@ -56,7 +56,6 @@ struct frag_v6_compare_key { > * @timer: queue expiration timer > * @lock: spinlock protecting this frag > * @refcnt: reference count of the queue > - * @fragments: received fragments head > * @rb_fragments: received fragments rb-tree root > * @fragments_tail: received fragments tail > * @last_run_head: the head of the last "run". see ip_fragment.c > @@ -77,8 +76,7 @@ struct inet_frag_queue { > struct timer_list timer; > spinlock_t lock; > refcount_t refcnt; > - struct sk_buff *fragments; /* used in 6lopwpan IPv6. */ > - struct rb_root rb_fragments; /* Used in IPv4/IPv6. */ > + struct rb_root rb_fragments; > struct sk_buff *fragments_tail; > struct sk_buff *last_run_head; > ktime_t stamp; > diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c > index bd61633d2c32..4196bcd4105a 100644 > --- a/net/ieee802154/6lowpan/reassembly.c > +++ b/net/ieee802154/6lowpan/reassembly.c > @@ -179,7 +179,6 @@ static int lowpan_frag_reasm(struct lowpan_frag_queue *fq, struct sk_buff *skb, > > skb->dev = ldev; > skb->tstamp = fq->q.stamp; > - fq->q.fragments = NULL; > fq->q.rb_fragments = RB_ROOT; > fq->q.fragments_tail = NULL; > fq->q.last_run_head = NULL; > diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c > index 9f69411251d0..737808e27f8b 100644 > --- a/net/ipv4/inet_fragment.c > +++ b/net/ipv4/inet_fragment.c > @@ -203,7 +203,6 @@ EXPORT_SYMBOL(inet_frag_rbtree_purge); > > void inet_frag_destroy(struct inet_frag_queue *q) > { > - struct sk_buff *fp; > struct netns_frags *nf; > unsigned int sum, sum_truesize = 0; > struct inet_frags *f; > @@ -212,20 +211,9 @@ void inet_frag_destroy(struct inet_frag_queue *q) > WARN_ON(del_timer(&q->timer) != 0); > > /* Release all fragment data. */ > - fp = q->fragments; > nf = q->net; > f = nf->f; > - if (fp) { > - do { > - struct sk_buff *xp = fp->next; > - > - sum_truesize += fp->truesize; > - kfree_skb(fp); > - fp = xp; > - } while (fp); > - } else { > - sum_truesize = inet_frag_rbtree_purge(&q->rb_fragments); > - } > + sum_truesize = inet_frag_rbtree_purge(&q->rb_fragments); > sum = sum_truesize + f->qsize; > > call_rcu(&q->rcu, inet_frag_destroy_rcu); > @@ -489,26 +477,20 @@ EXPORT_SYMBOL(inet_frag_reasm_finish); > > struct sk_buff *inet_frag_pull_head(struct inet_frag_queue *q) > { > - struct sk_buff *head; > + struct sk_buff *head, *skb; > > - if (q->fragments) { > - head = q->fragments; > - q->fragments = head->next; > - } else { > - struct sk_buff *skb; > + head = skb_rb_first(&q->rb_fragments); > + if (!head) > + return NULL; > + skb = FRAG_CB(head)->next_frag; > + if (skb) > + rb_replace_node(&head->rbnode, &skb->rbnode, > + &q->rb_fragments); > + else > + rb_erase(&head->rbnode, &q->rb_fragments); > + memset(&head->rbnode, 0, sizeof(head->rbnode)); > + barrier(); > > - head = skb_rb_first(&q->rb_fragments); > - if (!head) > - return NULL; > - skb = FRAG_CB(head)->next_frag; > - if (skb) > - rb_replace_node(&head->rbnode, &skb->rbnode, > - &q->rb_fragments); > - else > - rb_erase(&head->rbnode, &q->rb_fragments); > - memset(&head->rbnode, 0, sizeof(head->rbnode)); > - barrier(); > - } > if (head == q->fragments_tail) > q->fragments_tail = NULL; > > diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c > index 486ecb0aeb87..cf2b0a6a3337 100644 > --- a/net/ipv4/ip_fragment.c > +++ b/net/ipv4/ip_fragment.c > @@ -261,7 +261,6 @@ static int ip_frag_reinit(struct ipq *qp) > qp->q.flags = 0; > qp->q.len = 0; > qp->q.meat = 0; > - qp->q.fragments = NULL; > qp->q.rb_fragments = RB_ROOT; > qp->q.fragments_tail = NULL; > qp->q.last_run_head = NULL; > @@ -451,7 +450,6 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *skb, > ip_send_check(iph); > > __IP_INC_STATS(net, IPSTATS_MIB_REASMOKS); > - qp->q.fragments = NULL; > qp->q.rb_fragments = RB_ROOT; > qp->q.fragments_tail = NULL; > qp->q.last_run_head = NULL; > diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c > index cb1b4772dac0..3de0e9b0a482 100644 > --- a/net/ipv6/netfilter/nf_conntrack_reasm.c > +++ b/net/ipv6/netfilter/nf_conntrack_reasm.c > @@ -365,7 +365,6 @@ static int nf_ct_frag6_reasm(struct frag_queue *fq, struct sk_buff *skb, > skb_network_header_len(skb), > skb->csum); > > - fq->q.fragments = NULL; > fq->q.rb_fragments = RB_ROOT; > fq->q.fragments_tail = NULL; > fq->q.last_run_head = NULL; > diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c > index 24264d0a4b85..1a832f5e190b 100644 > --- a/net/ipv6/reassembly.c > +++ b/net/ipv6/reassembly.c > @@ -304,7 +304,6 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *skb, > rcu_read_lock(); > __IP6_INC_STATS(net, __in6_dev_get(dev), IPSTATS_MIB_REASMOKS); > rcu_read_unlock(); > - fq->q.fragments = NULL; > fq->q.rb_fragments = RB_ROOT; > fq->q.fragments_tail = NULL; > fq->q.last_run_head = NULL; > For the ieee802154 part: Acked-by: Stefan Schmidt <stefan@datenfreihafen.org> regards Stefan Schmidt
From: Peter Oskolkov <posk@google.com> Date: Mon, 25 Feb 2019 17:43:46 -0800 > Now that all users of struct inet_frag_queue have been converted > to use 'rb_fragments', remove the unused 'fragments' field. > > Build with `make allyesconfig` succeeded. ip_defrag selftest passed. > > Signed-off-by: Peter Oskolkov <posk@google.com> Applied, thanks Peter.
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h index b02bf737d019..378904ee9129 100644 --- a/include/net/inet_frag.h +++ b/include/net/inet_frag.h @@ -56,7 +56,6 @@ struct frag_v6_compare_key { * @timer: queue expiration timer * @lock: spinlock protecting this frag * @refcnt: reference count of the queue - * @fragments: received fragments head * @rb_fragments: received fragments rb-tree root * @fragments_tail: received fragments tail * @last_run_head: the head of the last "run". see ip_fragment.c @@ -77,8 +76,7 @@ struct inet_frag_queue { struct timer_list timer; spinlock_t lock; refcount_t refcnt; - struct sk_buff *fragments; /* used in 6lopwpan IPv6. */ - struct rb_root rb_fragments; /* Used in IPv4/IPv6. */ + struct rb_root rb_fragments; struct sk_buff *fragments_tail; struct sk_buff *last_run_head; ktime_t stamp; diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c index bd61633d2c32..4196bcd4105a 100644 --- a/net/ieee802154/6lowpan/reassembly.c +++ b/net/ieee802154/6lowpan/reassembly.c @@ -179,7 +179,6 @@ static int lowpan_frag_reasm(struct lowpan_frag_queue *fq, struct sk_buff *skb, skb->dev = ldev; skb->tstamp = fq->q.stamp; - fq->q.fragments = NULL; fq->q.rb_fragments = RB_ROOT; fq->q.fragments_tail = NULL; fq->q.last_run_head = NULL; diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c index 9f69411251d0..737808e27f8b 100644 --- a/net/ipv4/inet_fragment.c +++ b/net/ipv4/inet_fragment.c @@ -203,7 +203,6 @@ EXPORT_SYMBOL(inet_frag_rbtree_purge); void inet_frag_destroy(struct inet_frag_queue *q) { - struct sk_buff *fp; struct netns_frags *nf; unsigned int sum, sum_truesize = 0; struct inet_frags *f; @@ -212,20 +211,9 @@ void inet_frag_destroy(struct inet_frag_queue *q) WARN_ON(del_timer(&q->timer) != 0); /* Release all fragment data. */ - fp = q->fragments; nf = q->net; f = nf->f; - if (fp) { - do { - struct sk_buff *xp = fp->next; - - sum_truesize += fp->truesize; - kfree_skb(fp); - fp = xp; - } while (fp); - } else { - sum_truesize = inet_frag_rbtree_purge(&q->rb_fragments); - } + sum_truesize = inet_frag_rbtree_purge(&q->rb_fragments); sum = sum_truesize + f->qsize; call_rcu(&q->rcu, inet_frag_destroy_rcu); @@ -489,26 +477,20 @@ EXPORT_SYMBOL(inet_frag_reasm_finish); struct sk_buff *inet_frag_pull_head(struct inet_frag_queue *q) { - struct sk_buff *head; + struct sk_buff *head, *skb; - if (q->fragments) { - head = q->fragments; - q->fragments = head->next; - } else { - struct sk_buff *skb; + head = skb_rb_first(&q->rb_fragments); + if (!head) + return NULL; + skb = FRAG_CB(head)->next_frag; + if (skb) + rb_replace_node(&head->rbnode, &skb->rbnode, + &q->rb_fragments); + else + rb_erase(&head->rbnode, &q->rb_fragments); + memset(&head->rbnode, 0, sizeof(head->rbnode)); + barrier(); - head = skb_rb_first(&q->rb_fragments); - if (!head) - return NULL; - skb = FRAG_CB(head)->next_frag; - if (skb) - rb_replace_node(&head->rbnode, &skb->rbnode, - &q->rb_fragments); - else - rb_erase(&head->rbnode, &q->rb_fragments); - memset(&head->rbnode, 0, sizeof(head->rbnode)); - barrier(); - } if (head == q->fragments_tail) q->fragments_tail = NULL; diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c index 486ecb0aeb87..cf2b0a6a3337 100644 --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -261,7 +261,6 @@ static int ip_frag_reinit(struct ipq *qp) qp->q.flags = 0; qp->q.len = 0; qp->q.meat = 0; - qp->q.fragments = NULL; qp->q.rb_fragments = RB_ROOT; qp->q.fragments_tail = NULL; qp->q.last_run_head = NULL; @@ -451,7 +450,6 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *skb, ip_send_check(iph); __IP_INC_STATS(net, IPSTATS_MIB_REASMOKS); - qp->q.fragments = NULL; qp->q.rb_fragments = RB_ROOT; qp->q.fragments_tail = NULL; qp->q.last_run_head = NULL; diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c index cb1b4772dac0..3de0e9b0a482 100644 --- a/net/ipv6/netfilter/nf_conntrack_reasm.c +++ b/net/ipv6/netfilter/nf_conntrack_reasm.c @@ -365,7 +365,6 @@ static int nf_ct_frag6_reasm(struct frag_queue *fq, struct sk_buff *skb, skb_network_header_len(skb), skb->csum); - fq->q.fragments = NULL; fq->q.rb_fragments = RB_ROOT; fq->q.fragments_tail = NULL; fq->q.last_run_head = NULL; diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c index 24264d0a4b85..1a832f5e190b 100644 --- a/net/ipv6/reassembly.c +++ b/net/ipv6/reassembly.c @@ -304,7 +304,6 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *skb, rcu_read_lock(); __IP6_INC_STATS(net, __in6_dev_get(dev), IPSTATS_MIB_REASMOKS); rcu_read_unlock(); - fq->q.fragments = NULL; fq->q.rb_fragments = RB_ROOT; fq->q.fragments_tail = NULL; fq->q.last_run_head = NULL;
Now that all users of struct inet_frag_queue have been converted to use 'rb_fragments', remove the unused 'fragments' field. Build with `make allyesconfig` succeeded. ip_defrag selftest passed. Signed-off-by: Peter Oskolkov <posk@google.com> --- include/net/inet_frag.h | 4 +-- net/ieee802154/6lowpan/reassembly.c | 1 - net/ipv4/inet_fragment.c | 44 ++++++++----------------- net/ipv4/ip_fragment.c | 2 -- net/ipv6/netfilter/nf_conntrack_reasm.c | 1 - net/ipv6/reassembly.c | 1 - 6 files changed, 14 insertions(+), 39 deletions(-)