From 1e4b82873af0f21002e37a81ef063d2e5410deb3 Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Mon, 15 Oct 2007 02:39:14 -0700 Subject: [INET]: Consolidate the xxx_frag_destroy To make in possible we need to know the exact frag queue size for inet_frags->mem management and two callbacks: * to destoy the skb (optional, used in conntracks only) * to free the queue itself (mandatory, but later I plan to move the allocation and the destruction of frag_queues into the common place, so this callback will most likely be optional too). Signed-off-by: Pavel Emelyanov Signed-off-by: David S. Miller --- net/ipv4/inet_fragment.c | 40 ++++++++++++++++++++++++++++++++++++++++ net/ipv4/ip_fragment.c | 39 ++++++++++----------------------------- 2 files changed, 50 insertions(+), 29 deletions(-) (limited to 'net/ipv4') diff --git a/net/ipv4/inet_fragment.c b/net/ipv4/inet_fragment.c index ec10e05c666..15fb2c4a36a 100644 --- a/net/ipv4/inet_fragment.c +++ b/net/ipv4/inet_fragment.c @@ -17,6 +17,8 @@ #include #include #include +#include +#include #include @@ -100,3 +102,41 @@ void inet_frag_kill(struct inet_frag_queue *fq, struct inet_frags *f) } EXPORT_SYMBOL(inet_frag_kill); + +static inline void frag_kfree_skb(struct inet_frags *f, struct sk_buff *skb, + int *work) +{ + if (work) + *work -= skb->truesize; + + atomic_sub(skb->truesize, &f->mem); + if (f->skb_free) + f->skb_free(skb); + kfree_skb(skb); +} + +void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f, + int *work) +{ + struct sk_buff *fp; + + BUG_TRAP(q->last_in & COMPLETE); + BUG_TRAP(del_timer(&q->timer) == 0); + + /* Release all fragment data. */ + fp = q->fragments; + while (fp) { + struct sk_buff *xp = fp->next; + + frag_kfree_skb(f, fp, work); + fp = xp; + } + + if (work) + *work -= f->qsize; + atomic_sub(f->qsize, &f->mem); + + f->destructor(q); + +} +EXPORT_SYMBOL(inet_frag_destroy); diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c index e231c248aea..e8736632094 100644 --- a/net/ipv4/ip_fragment.c +++ b/net/ipv4/ip_fragment.c @@ -132,11 +132,13 @@ static __inline__ void frag_kfree_skb(struct sk_buff *skb, int *work) kfree_skb(skb); } -static __inline__ void frag_free_queue(struct ipq *qp, int *work) +static __inline__ void ip4_frag_free(struct inet_frag_queue *q) { - if (work) - *work -= sizeof(struct ipq); - atomic_sub(sizeof(struct ipq), &ip4_frags.mem); + struct ipq *qp; + + qp = container_of(q, struct ipq, q); + if (qp->peer) + inet_putpeer(qp->peer); kfree(qp); } @@ -153,34 +155,10 @@ static __inline__ struct ipq *frag_alloc_queue(void) /* Destruction primitives. */ -/* Complete destruction of ipq. */ -static void ip_frag_destroy(struct ipq *qp, int *work) -{ - struct sk_buff *fp; - - BUG_TRAP(qp->q.last_in&COMPLETE); - BUG_TRAP(del_timer(&qp->q.timer) == 0); - - if (qp->peer) - inet_putpeer(qp->peer); - - /* Release all fragment data. */ - fp = qp->q.fragments; - while (fp) { - struct sk_buff *xp = fp->next; - - frag_kfree_skb(fp, work); - fp = xp; - } - - /* Finally, release the queue descriptor itself. */ - frag_free_queue(qp, work); -} - static __inline__ void ipq_put(struct ipq *ipq, int *work) { if (atomic_dec_and_test(&ipq->q.refcnt)) - ip_frag_destroy(ipq, work); + inet_frag_destroy(&ipq->q, &ip4_frags, work); } /* Kill ipq entry. It is not destroyed immediately, @@ -721,6 +699,9 @@ void __init ipfrag_init(void) { ip4_frags.ctl = &ip4_frags_ctl; ip4_frags.hashfn = ip4_hashfn; + ip4_frags.destructor = ip4_frag_free; + ip4_frags.skb_free = NULL; + ip4_frags.qsize = sizeof(struct ipq); inet_frags_init(&ip4_frags); } -- cgit v1.2.3