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Diffstat (limited to 'net/ieee802154/reassembly.c')
-rw-r--r--net/ieee802154/reassembly.c69
1 files changed, 38 insertions, 31 deletions
diff --git a/net/ieee802154/reassembly.c b/net/ieee802154/reassembly.c
index 6f1428c4870..ffec6ce5100 100644
--- a/net/ieee802154/reassembly.c
+++ b/net/ieee802154/reassembly.c
@@ -30,6 +30,8 @@
#include "reassembly.h"
+static const char lowpan_frags_cache_name[] = "lowpan-frags";
+
struct lowpan_frag_info {
__be16 d_tag;
u16 d_size;
@@ -50,29 +52,25 @@ static unsigned int lowpan_hash_frag(__be16 tag, u16 d_size,
const struct ieee802154_addr *saddr,
const struct ieee802154_addr *daddr)
{
- u32 c;
-
net_get_random_once(&lowpan_frags.rnd, sizeof(lowpan_frags.rnd));
- c = jhash_3words(ieee802154_addr_hash(saddr),
- ieee802154_addr_hash(daddr),
- (__force u32)(tag + (d_size << 16)),
- lowpan_frags.rnd);
-
- return c & (INETFRAGS_HASHSZ - 1);
+ return jhash_3words(ieee802154_addr_hash(saddr),
+ ieee802154_addr_hash(daddr),
+ (__force u32)(tag + (d_size << 16)),
+ lowpan_frags.rnd);
}
-static unsigned int lowpan_hashfn(struct inet_frag_queue *q)
+static unsigned int lowpan_hashfn(const struct inet_frag_queue *q)
{
- struct lowpan_frag_queue *fq;
+ const struct lowpan_frag_queue *fq;
fq = container_of(q, struct lowpan_frag_queue, q);
return lowpan_hash_frag(fq->tag, fq->d_size, &fq->saddr, &fq->daddr);
}
-static bool lowpan_frag_match(struct inet_frag_queue *q, void *a)
+static bool lowpan_frag_match(const struct inet_frag_queue *q, const void *a)
{
- struct lowpan_frag_queue *fq;
- struct lowpan_create_arg *arg = a;
+ const struct lowpan_frag_queue *fq;
+ const struct lowpan_create_arg *arg = a;
fq = container_of(q, struct lowpan_frag_queue, q);
return fq->tag == arg->tag && fq->d_size == arg->d_size &&
@@ -80,10 +78,10 @@ static bool lowpan_frag_match(struct inet_frag_queue *q, void *a)
ieee802154_addr_equal(&fq->daddr, arg->dst);
}
-static void lowpan_frag_init(struct inet_frag_queue *q, void *a)
+static void lowpan_frag_init(struct inet_frag_queue *q, const void *a)
{
+ const struct lowpan_create_arg *arg = a;
struct lowpan_frag_queue *fq;
- struct lowpan_create_arg *arg = a;
fq = container_of(q, struct lowpan_frag_queue, q);
@@ -103,7 +101,7 @@ static void lowpan_frag_expire(unsigned long data)
spin_lock(&fq->q.lock);
- if (fq->q.last_in & INET_FRAG_COMPLETE)
+ if (fq->q.flags & INET_FRAG_COMPLETE)
goto out;
inet_frag_kill(&fq->q, &lowpan_frags);
@@ -128,7 +126,6 @@ fq_find(struct net *net, const struct lowpan_frag_info *frag_info,
arg.src = src;
arg.dst = dst;
- read_lock(&lowpan_frags.lock);
hash = lowpan_hash_frag(frag_info->d_tag, frag_info->d_size, src, dst);
q = inet_frag_find(&ieee802154_lowpan->frags,
@@ -147,7 +144,7 @@ static int lowpan_frag_queue(struct lowpan_frag_queue *fq,
struct net_device *dev;
int end, offset;
- if (fq->q.last_in & INET_FRAG_COMPLETE)
+ if (fq->q.flags & INET_FRAG_COMPLETE)
goto err;
offset = lowpan_cb(skb)->d_offset << 3;
@@ -159,14 +156,14 @@ static int lowpan_frag_queue(struct lowpan_frag_queue *fq,
* or have different end, the segment is corrupted.
*/
if (end < fq->q.len ||
- ((fq->q.last_in & INET_FRAG_LAST_IN) && end != fq->q.len))
+ ((fq->q.flags & INET_FRAG_LAST_IN) && end != fq->q.len))
goto err;
- fq->q.last_in |= INET_FRAG_LAST_IN;
+ fq->q.flags |= INET_FRAG_LAST_IN;
fq->q.len = end;
} else {
if (end > fq->q.len) {
/* Some bits beyond end -> corruption. */
- if (fq->q.last_in & INET_FRAG_LAST_IN)
+ if (fq->q.flags & INET_FRAG_LAST_IN)
goto err;
fq->q.len = end;
}
@@ -206,13 +203,13 @@ found:
if (frag_type == LOWPAN_DISPATCH_FRAG1) {
/* Calculate uncomp. 6lowpan header to estimate full size */
fq->q.meat += lowpan_uncompress_size(skb, NULL);
- fq->q.last_in |= INET_FRAG_FIRST_IN;
+ fq->q.flags |= INET_FRAG_FIRST_IN;
} else {
fq->q.meat += skb->len;
}
add_frag_mem_limit(&fq->q, skb->truesize);
- if (fq->q.last_in == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
+ if (fq->q.flags == (INET_FRAG_FIRST_IN | INET_FRAG_LAST_IN) &&
fq->q.meat == fq->q.len) {
int res;
unsigned long orefdst = skb->_skb_refdst;
@@ -223,7 +220,6 @@ found:
return res;
}
- inet_frag_lru_move(&fq->q);
return -1;
err:
kfree_skb(skb);
@@ -373,11 +369,10 @@ int lowpan_frag_rcv(struct sk_buff *skb, const u8 frag_type)
if (frag_info->d_size > ieee802154_lowpan->max_dsize)
goto err;
- inet_frag_evictor(&ieee802154_lowpan->frags, &lowpan_frags, false);
-
fq = fq_find(net, frag_info, &source, &dest);
if (fq != NULL) {
int ret;
+
spin_lock(&fq->q.lock);
ret = lowpan_frag_queue(fq, skb, frag_type);
spin_unlock(&fq->q.lock);
@@ -393,20 +388,25 @@ err:
EXPORT_SYMBOL(lowpan_frag_rcv);
#ifdef CONFIG_SYSCTL
+static int zero;
+
static struct ctl_table lowpan_frags_ns_ctl_table[] = {
{
.procname = "6lowpanfrag_high_thresh",
.data = &init_net.ieee802154_lowpan.frags.high_thresh,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &init_net.ieee802154_lowpan.frags.low_thresh
},
{
.procname = "6lowpanfrag_low_thresh",
.data = &init_net.ieee802154_lowpan.frags.low_thresh,
.maxlen = sizeof(int),
.mode = 0644,
- .proc_handler = proc_dointvec
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &zero,
+ .extra2 = &init_net.ieee802154_lowpan.frags.high_thresh
},
{
.procname = "6lowpanfrag_time",
@@ -425,10 +425,12 @@ static struct ctl_table lowpan_frags_ns_ctl_table[] = {
{ }
};
+/* secret interval has been deprecated */
+static int lowpan_frags_secret_interval_unused;
static struct ctl_table lowpan_frags_ctl_table[] = {
{
.procname = "6lowpanfrag_secret_interval",
- .data = &lowpan_frags.secret_interval,
+ .data = &lowpan_frags_secret_interval_unused,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
@@ -451,7 +453,10 @@ static int __net_init lowpan_frags_ns_sysctl_register(struct net *net)
goto err_alloc;
table[0].data = &ieee802154_lowpan->frags.high_thresh;
+ table[0].extra1 = &ieee802154_lowpan->frags.low_thresh;
+ table[0].extra2 = &init_net.ieee802154_lowpan.frags.high_thresh;
table[1].data = &ieee802154_lowpan->frags.low_thresh;
+ table[1].extra2 = &ieee802154_lowpan->frags.high_thresh;
table[2].data = &ieee802154_lowpan->frags.timeout;
table[3].data = &ieee802154_lowpan->max_dsize;
@@ -568,8 +573,10 @@ int __init lowpan_net_frag_init(void)
lowpan_frags.qsize = sizeof(struct frag_queue);
lowpan_frags.match = lowpan_frag_match;
lowpan_frags.frag_expire = lowpan_frag_expire;
- lowpan_frags.secret_interval = 10 * 60 * HZ;
- inet_frags_init(&lowpan_frags);
+ lowpan_frags.frags_cache_name = lowpan_frags_cache_name;
+ ret = inet_frags_init(&lowpan_frags);
+ if (ret)
+ goto err_pernet;
return ret;
err_pernet:
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-25 05:47:30 +0000