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[NETNS][FRAGS]: Make the mem counter per-namespace. 

This is also simple, but introduces more changes, since
then mem counter is altered in more places.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2008-01-22 06:07:25 -08:00 committed by David S. Miller
parent e5a2bb842c
commit 6ddc082223
9 changed files with 54 additions and 50 deletions
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4
include/net/inet_frag.h
View File

@ -3,6 +3,7 @@
struct netns_frags {
int nqueues;
atomic_t mem;
};
struct inet_frag_queue {
@ -38,7 +39,6 @@ struct inet_frags {
rwlock_t lock;
u32 rnd;
int qsize;
atomic_t mem;
struct timer_list secret_timer;
struct inet_frags_ctl *ctl;
@ -60,7 +60,7 @@ void inet_frags_init_net(struct netns_frags *nf);
void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
void inet_frag_destroy(struct inet_frag_queue *q,
struct inet_frags *f, int *work);
int inet_frag_evictor(struct inet_frags *f);
int inet_frag_evictor(struct netns_frags *nf, struct inet_frags *f);
struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
struct inet_frags *f, void *key, unsigned int hash);

2
include/net/ip.h
View File

@ -331,7 +331,7 @@ enum ip_defrag_users
};
int ip_defrag(struct sk_buff *skb, u32 user);
int ip_frag_mem(void);
int ip_frag_mem(struct net *net);
int ip_frag_nqueues(struct net *net);
/*

2
include/net/ipv6.h
View File

@ -246,7 +246,7 @@ struct ipv6_txoptions *ipv6_fixup_options(struct ipv6_txoptions *opt_space,
extern int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb);
int ip6_frag_nqueues(struct net *net);
int ip6_frag_mem(void);
int ip6_frag_mem(struct net *net);
#define IPV6_FRAG_TIMEOUT (60*HZ) /* 60 seconds */

21
net/ipv4/inet_fragment.c
View File

@ -63,8 +63,6 @@ void inet_frags_init(struct inet_frags *f)
f->rnd = (u32) ((num_physpages ^ (num_physpages>>7)) ^
(jiffies ^ (jiffies >> 6)));
atomic_set(&f->mem, 0);
setup_timer(&f->secret_timer, inet_frag_secret_rebuild,
(unsigned long)f);
f->secret_timer.expires = jiffies + f->ctl->secret_interval;
@ -75,6 +73,7 @@ EXPORT_SYMBOL(inet_frags_init);
void inet_frags_init_net(struct netns_frags *nf)
{
nf->nqueues = 0;
atomic_set(&nf->mem, 0);
}
EXPORT_SYMBOL(inet_frags_init_net);
@ -107,13 +106,13 @@ 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)
static inline void frag_kfree_skb(struct netns_frags *nf, struct inet_frags *f,
struct sk_buff *skb, int *work)
{
if (work)
*work -= skb->truesize;
atomic_sub(skb->truesize, &f->mem);
atomic_sub(skb->truesize, &nf->mem);
if (f->skb_free)
f->skb_free(skb);
kfree_skb(skb);
@ -123,22 +122,24 @@ void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
int *work)
{
struct sk_buff *fp;
struct netns_frags *nf;
BUG_TRAP(q->last_in & COMPLETE);
BUG_TRAP(del_timer(&q->timer) == 0);
/* Release all fragment data. */
fp = q->fragments;
nf = q->net;
while (fp) {
struct sk_buff *xp = fp->next;
frag_kfree_skb(f, fp, work);
frag_kfree_skb(nf, f, fp, work);
fp = xp;
}
if (work)
*work -= f->qsize;
atomic_sub(f->qsize, &f->mem);
atomic_sub(f->qsize, &nf->mem);
if (f->destructor)
f->destructor(q);
@ -147,12 +148,12 @@ void inet_frag_destroy(struct inet_frag_queue *q, struct inet_frags *f,
}
EXPORT_SYMBOL(inet_frag_destroy);
int inet_frag_evictor(struct inet_frags *f)
int inet_frag_evictor(struct netns_frags *nf, struct inet_frags *f)
{
struct inet_frag_queue *q;
int work, evicted = 0;
work = atomic_read(&f->mem) - f->ctl->low_thresh;
work = atomic_read(&nf->mem) - f->ctl->low_thresh;
while (work > 0) {
read_lock(&f->lock);
if (list_empty(&f->lru_list)) {
@ -226,7 +227,7 @@ static struct inet_frag_queue *inet_frag_alloc(struct netns_frags *nf,
return NULL;
f->constructor(q, arg);
atomic_add(f->qsize, &f->mem);
atomic_add(f->qsize, &nf->mem);
setup_timer(&q->timer, f->frag_expire, (unsigned long)q);
spin_lock_init(&q->lock);
atomic_set(&q->refcnt, 1);

29
net/ipv4/ip_fragment.c
View File

@ -100,9 +100,9 @@ int ip_frag_nqueues(struct net *net)
return net->ipv4.frags.nqueues;
}
int ip_frag_mem(void)
int ip_frag_mem(struct net *net)
{
return atomic_read(&ip4_frags.mem);
return atomic_read(&net->ipv4.frags.mem);
}
static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
@ -142,11 +142,12 @@ static int ip4_frag_match(struct inet_frag_queue *q, void *a)
}
/* Memory Tracking Functions. */
static __inline__ void frag_kfree_skb(struct sk_buff *skb, int *work)
static __inline__ void frag_kfree_skb(struct netns_frags *nf,
struct sk_buff *skb, int *work)
{
if (work)
*work -= skb->truesize;
atomic_sub(skb->truesize, &ip4_frags.mem);
atomic_sub(skb->truesize, &nf->mem);
kfree_skb(skb);
}
@ -192,11 +193,11 @@ static void ipq_kill(struct ipq *ipq)
/* Memory limiting on fragments. Evictor trashes the oldest
* fragment queue until we are back under the threshold.
*/
static void ip_evictor(void)
static void ip_evictor(struct net *net)
{
int evicted;
evicted = inet_frag_evictor(&ip4_frags);
evicted = inet_frag_evictor(&net->ipv4.frags, &ip4_frags);
if (evicted)
IP_ADD_STATS_BH(IPSTATS_MIB_REASMFAILS, evicted);
}
@ -294,7 +295,7 @@ static int ip_frag_reinit(struct ipq *qp)
fp = qp->q.fragments;
do {
struct sk_buff *xp = fp->next;
frag_kfree_skb(fp, NULL);
frag_kfree_skb(qp->q.net, fp, NULL);
fp = xp;
} while (fp);
@ -431,7 +432,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
qp->q.fragments = next;
qp->q.meat -= free_it->len;
frag_kfree_skb(free_it, NULL);
frag_kfree_skb(qp->q.net, free_it, NULL);
}
}
@ -451,7 +452,7 @@ static int ip_frag_queue(struct ipq *qp, struct sk_buff *skb)
}
qp->q.stamp = skb->tstamp;
qp->q.meat += skb->len;
atomic_add(skb->truesize, &ip4_frags.mem);
atomic_add(skb->truesize, &qp->q.net->mem);
if (offset == 0)
qp->q.last_in |= FIRST_IN;
@ -534,12 +535,12 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
head->len -= clone->len;
clone->csum = 0;
clone->ip_summed = head->ip_summed;
atomic_add(clone->truesize, &ip4_frags.mem);
atomic_add(clone->truesize, &qp->q.net->mem);
}
skb_shinfo(head)->frag_list = head->next;
skb_push(head, head->data - skb_network_header(head));
atomic_sub(head->truesize, &ip4_frags.mem);
atomic_sub(head->truesize, &qp->q.net->mem);
for (fp=head->next; fp; fp = fp->next) {
head->data_len += fp->len;
@ -549,7 +550,7 @@ static int ip_frag_reasm(struct ipq *qp, struct sk_buff *prev,
else if (head->ip_summed == CHECKSUM_COMPLETE)
head->csum = csum_add(head->csum, fp->csum);
head->truesize += fp->truesize;
atomic_sub(fp->truesize, &ip4_frags.mem);
atomic_sub(fp->truesize, &qp->q.net->mem);
}
head->next = NULL;
@ -588,8 +589,8 @@ int ip_defrag(struct sk_buff *skb, u32 user)
net = skb->dev->nd_net;
/* Start by cleaning up the memory. */
if (atomic_read(&ip4_frags.mem) > ip4_frags_ctl.high_thresh)
ip_evictor();
if (atomic_read(&net->ipv4.frags.mem) > ip4_frags_ctl.high_thresh)
ip_evictor(net);
/* Lookup (or create) queue header */
if ((qp = ip_find(net, ip_hdr(skb), user)) != NULL) {

2
net/ipv4/proc.c
View File

@ -62,7 +62,7 @@ static int sockstat_seq_show(struct seq_file *seq, void *v)
seq_printf(seq, "UDPLITE: inuse %d\n", sock_prot_inuse_get(&udplite_prot));
seq_printf(seq, "RAW: inuse %d\n", sock_prot_inuse_get(&raw_prot));
seq_printf(seq, "FRAG: inuse %d memory %d\n",
ip_frag_nqueues(&init_net), ip_frag_mem());
ip_frag_nqueues(&init_net), ip_frag_mem(&init_net));
return 0;
}

14
net/ipv6/netfilter/nf_conntrack_reasm.c
View File

@ -155,7 +155,7 @@ static inline void frag_kfree_skb(struct sk_buff *skb, unsigned int *work)
{
if (work)
*work -= skb->truesize;
atomic_sub(skb->truesize, &nf_frags.mem);
atomic_sub(skb->truesize, &nf_init_frags.mem);
nf_skb_free(skb);
kfree_skb(skb);
}
@ -177,7 +177,7 @@ static __inline__ void fq_kill(struct nf_ct_frag6_queue *fq)
static void nf_ct_frag6_evictor(void)
{
inet_frag_evictor(&nf_frags);
inet_frag_evictor(&nf_init_frags, &nf_frags);
}
static void nf_ct_frag6_expire(unsigned long data)
@ -382,7 +382,7 @@ static int nf_ct_frag6_queue(struct nf_ct_frag6_queue *fq, struct sk_buff *skb,
skb->dev = NULL;
fq->q.stamp = skb->tstamp;
fq->q.meat += skb->len;
atomic_add(skb->truesize, &nf_frags.mem);
atomic_add(skb->truesize, &nf_init_frags.mem);
/* The first fragment.
* nhoffset is obtained from the first fragment, of course.
@ -459,7 +459,7 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
clone->ip_summed = head->ip_summed;
NFCT_FRAG6_CB(clone)->orig = NULL;
atomic_add(clone->truesize, &nf_frags.mem);
atomic_add(clone->truesize, &nf_init_frags.mem);
}
/* We have to remove fragment header from datagram and to relocate
@ -473,7 +473,7 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
skb_shinfo(head)->frag_list = head->next;
skb_reset_transport_header(head);
skb_push(head, head->data - skb_network_header(head));
atomic_sub(head->truesize, &nf_frags.mem);
atomic_sub(head->truesize, &nf_init_frags.mem);
for (fp=head->next; fp; fp = fp->next) {
head->data_len += fp->len;
@ -483,7 +483,7 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
else if (head->ip_summed == CHECKSUM_COMPLETE)
head->csum = csum_add(head->csum, fp->csum);
head->truesize += fp->truesize;
atomic_sub(fp->truesize, &nf_frags.mem);
atomic_sub(fp->truesize, &nf_init_frags.mem);
}
head->next = NULL;
@ -633,7 +633,7 @@ struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb)
goto ret_orig;
}
if (atomic_read(&nf_frags.mem) > nf_frags_ctl.high_thresh)
if (atomic_read(&nf_init_frags.mem) > nf_frags_ctl.high_thresh)
nf_ct_frag6_evictor();
fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr);

2
net/ipv6/proc.c
View File

@ -44,7 +44,7 @@ static int sockstat6_seq_show(struct seq_file *seq, void *v)
seq_printf(seq, "RAW6: inuse %d\n",
sock_prot_inuse_get(&rawv6_prot));
seq_printf(seq, "FRAG6: inuse %d memory %d\n",
ip6_frag_nqueues(&init_net), ip6_frag_mem());
ip6_frag_nqueues(&init_net), ip6_frag_mem(&init_net));
return 0;
}

28
net/ipv6/reassembly.c
View File

@ -89,9 +89,9 @@ int ip6_frag_nqueues(struct net *net)
return net->ipv6.frags.nqueues;
}
int ip6_frag_mem(void)
int ip6_frag_mem(struct net *net)
{
return atomic_read(&ip6_frags.mem);
return atomic_read(&net->ipv6.frags.mem);
}
static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
@ -149,11 +149,12 @@ int ip6_frag_match(struct inet_frag_queue *q, void *a)
EXPORT_SYMBOL(ip6_frag_match);
/* Memory Tracking Functions. */
static inline void frag_kfree_skb(struct sk_buff *skb, int *work)
static inline void frag_kfree_skb(struct netns_frags *nf,
struct sk_buff *skb, int *work)
{
if (work)
*work -= skb->truesize;
atomic_sub(skb->truesize, &ip6_frags.mem);
atomic_sub(skb->truesize, &nf->mem);
kfree_skb(skb);
}
@ -183,11 +184,11 @@ static __inline__ void fq_kill(struct frag_queue *fq)
inet_frag_kill(&fq->q, &ip6_frags);
}
static void ip6_evictor(struct inet6_dev *idev)
static void ip6_evictor(struct net *net, struct inet6_dev *idev)
{
int evicted;
evicted = inet_frag_evictor(&ip6_frags);
evicted = inet_frag_evictor(&net->ipv6.frags, &ip6_frags);
if (evicted)
IP6_ADD_STATS_BH(idev, IPSTATS_MIB_REASMFAILS, evicted);
}
@ -389,7 +390,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
fq->q.fragments = next;
fq->q.meat -= free_it->len;
frag_kfree_skb(free_it, NULL);
frag_kfree_skb(fq->q.net, free_it, NULL);
}
}
@ -409,7 +410,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
}
fq->q.stamp = skb->tstamp;
fq->q.meat += skb->len;
atomic_add(skb->truesize, &ip6_frags.mem);
atomic_add(skb->truesize, &fq->q.net->mem);
/* The first fragment.
* nhoffset is obtained from the first fragment, of course.
@ -503,7 +504,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
head->len -= clone->len;
clone->csum = 0;
clone->ip_summed = head->ip_summed;
atomic_add(clone->truesize, &ip6_frags.mem);
atomic_add(clone->truesize, &fq->q.net->mem);
}
/* We have to remove fragment header from datagram and to relocate
@ -518,7 +519,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
skb_shinfo(head)->frag_list = head->next;
skb_reset_transport_header(head);
skb_push(head, head->data - skb_network_header(head));
atomic_sub(head->truesize, &ip6_frags.mem);
atomic_sub(head->truesize, &fq->q.net->mem);
for (fp=head->next; fp; fp = fp->next) {
head->data_len += fp->len;
@ -528,7 +529,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff *prev,
else if (head->ip_summed == CHECKSUM_COMPLETE)
head->csum = csum_add(head->csum, fp->csum);
head->truesize += fp->truesize;
atomic_sub(fp->truesize, &ip6_frags.mem);
atomic_sub(fp->truesize, &fq->q.net->mem);
}
head->next = NULL;
@ -600,8 +601,9 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
}
net = skb->dev->nd_net;
if (atomic_read(&ip6_frags.mem) > init_net.ipv6.sysctl.frags.high_thresh)
ip6_evictor(ip6_dst_idev(skb->dst));
if (atomic_read(&net->ipv6.frags.mem) >
init_net.ipv6.sysctl.frags.high_thresh)
ip6_evictor(net, ip6_dst_idev(skb->dst));
if ((fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr,
ip6_dst_idev(skb->dst))) != NULL) {