Please pull from:
master.kernel.org:/home/acme/BK/net-2.5
- Arnaldo
You can import this changeset into BK by piping this whole message to:
'| bk receive [path to repository]' or apply the patch as usual.
===================================================================
ChangeSet@1.859, 2002-10-16 21:41:11-03:00, acme@conectiva.com.br
o ipv4: make arp seq_file show method only produce one record per call
ip_proc.c | 214 +++++++++++++++++++++++++++++++++++++++++++-------------------
1 files changed, 150 insertions(+), 64 deletions(-)
diff -Nru a/net/ipv4/ip_proc.c b/net/ipv4/ip_proc.c
--- a/net/ipv4/ip_proc.c Wed Oct 16 21:44:36 2002
+++ b/net/ipv4/ip_proc.c Wed Oct 16 21:44:36 2002
@@ -67,99 +67,185 @@
}
#endif /* CONFIG_AX25 */
+struct arp_iter_state {
+ loff_t is_pneigh: 1,
+ bucket: 6,
+ pos: sizeof(loff_t) * 8 - 7;
+};
+
+static __inline__ struct neighbour *neigh_get_bucket(loff_t *pos)
+{
+ struct neighbour *n = NULL;
+ struct arp_iter_state* state = (struct arp_iter_state *)pos;
+ loff_t l = state->pos;
+ int i, bucket = state->bucket;
+
+ for (; bucket <= NEIGH_HASHMASK; ++bucket)
+ for (i = 0, n = arp_tbl.hash_buckets[bucket]; n;
+ ++i, n = n->next)
+ /* Do not confuse users "arp -a" with magic entries */
+ if ((n->nud_state & ~NUD_NOARP) && !l--) {
+ state->pos = i;
+ state->bucket = bucket;
+ goto out;
+ }
+out:
+ return n;
+}
+
+static __inline__ struct pneigh_entry *pneigh_get_bucket(loff_t *pos)
+{
+ struct pneigh_entry *n = NULL;
+ struct arp_iter_state* state = (struct arp_iter_state *)pos;
+ loff_t l = state->pos;
+ int i, bucket = state->bucket;
+
+ for (; bucket <= PNEIGH_HASHMASK; ++bucket)
+ for (i = 0, n = arp_tbl.phash_buckets[bucket]; n;
+ ++i, n = n->next)
+ if (!l--) {
+ state->pos = i;
+ state->bucket = bucket;
+ goto out;
+ }
+out:
+ return n;
+}
+
+static __inline__ void *arp_get_bucket(struct seq_file *seq, loff_t *pos)
+{
+ void *rc = neigh_get_bucket(pos);
+
+ if (!rc) {
+ struct arp_iter_state* state = (struct arp_iter_state *)pos;
+
+ read_unlock_bh(&arp_tbl.lock);
+ state->is_pneigh = 1;
+ state->bucket = 0;
+ state->pos = 0;
+ /* HACK: till there is state we can pass to seq_show... */
+ seq->private = (void *)1;
+ rc = pneigh_get_bucket(pos);
+ }
+ return rc;
+}
+
static void *arp_seq_start(struct seq_file *seq, loff_t *pos)
{
- return (void *)(unsigned long)++*pos;
+ read_lock_bh(&arp_tbl.lock);
+ return *pos ? arp_get_bucket(seq, pos) : (void *)1;
}
static void *arp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
- return (void *)(unsigned long)((++*pos) >=
- (NEIGH_HASHMASK +
- PNEIGH_HASHMASK - 1) ? 0 : *pos);
+ void *rc;
+ struct arp_iter_state* state;
+
+ if (v == (void *)1) {
+ rc = arp_get_bucket(seq, pos);
+ goto out;
+ }
+
+ state = (struct arp_iter_state *)pos;
+ if (!state->is_pneigh) {
+ struct neighbour *n = v;
+
+ rc = n = n->next;
+ if (n)
+ goto out;
+ state->pos = 0;
+ ++state->bucket;
+ rc = neigh_get_bucket(pos);
+ if (rc)
+ goto out;
+ read_unlock_bh(&arp_tbl.lock);
+ /* HACK: till there is state we can pass to seq_show... */
+ seq->private = (void *)1;
+ state->is_pneigh = 1;
+ state->bucket = 0;
+ state->pos = 0;
+ rc = pneigh_get_bucket(pos);
+ } else {
+ struct pneigh_entry *pn = v;
+
+ pn = pn->next;
+ if (!pn) {
+ ++state->bucket;
+ state->pos = 0;
+ pn = pneigh_get_bucket(pos);
+ }
+ rc = pn;
+ }
+out:
+ ++*pos;
+ return rc;
}
static void arp_seq_stop(struct seq_file *seq, void *v)
{
+ if (!seq->private)
+ read_unlock_bh(&arp_tbl.lock);
}
#define HBUFFERLEN 30
-static __inline__ void arp_format_neigh_table(struct seq_file *seq, int entry)
+static __inline__ void arp_format_neigh_entry(struct seq_file *seq,
+ struct neighbour *n)
{
char hbuffer[HBUFFERLEN];
const char hexbuf[] = "0123456789ABCDEF";
- struct neighbour *n;
int k, j;
+ char tbuf[16];
+ struct net_device *dev = n->dev;
+ int hatype = dev->type;
- read_lock_bh(&arp_tbl.lock);
- for (n = arp_tbl.hash_buckets[entry]; n; n = n->next) {
- char tbuf[16];
- struct net_device *dev = n->dev;
- int hatype = dev->type;
-
- /* Do not confuse users "arp -a" with magic entries */
- if (!(n->nud_state & ~NUD_NOARP))
- continue;
-
- read_lock(&n->lock);
- /* Convert hardware address to XX:XX:XX:XX ... form. */
+ read_lock(&n->lock);
+ /* Convert hardware address to XX:XX:XX:XX ... form. */
#ifdef CONFIG_AX25
- if (hatype == ARPHRD_AX25 || hatype == ARPHRD_NETROM)
- ax2asc2((ax25_address *)n->ha, hbuffer);
- else {
+ if (hatype == ARPHRD_AX25 || hatype == ARPHRD_NETROM)
+ ax2asc2((ax25_address *)n->ha, hbuffer);
+ else {
#endif
- for (k = 0, j = 0; k < HBUFFERLEN - 3 &&
- j < dev->addr_len; j++) {
- hbuffer[k++] = hexbuf[(n->ha[j] >> 4) & 15];
- hbuffer[k++] = hexbuf[n->ha[j] & 15];
- hbuffer[k++] = ':';
- }
- hbuffer[--k] = 0;
+ for (k = 0, j = 0; k < HBUFFERLEN - 3 && j < dev->addr_len; j++) {
+ hbuffer[k++] = hexbuf[(n->ha[j] >> 4) & 15];
+ hbuffer[k++] = hexbuf[n->ha[j] & 15];
+ hbuffer[k++] = ':';
+ }
+ hbuffer[--k] = 0;
#ifdef CONFIG_AX25
- }
-#endif
- sprintf(tbuf, "%u.%u.%u.%u",
- NIPQUAD(*(u32*)n->primary_key));
- seq_printf(seq, "%-16s 0x%-10x0x%-10x%s"
- " * %s\n",
- tbuf, hatype, arp_state_to_flags(n),
- hbuffer, dev->name);
- read_unlock(&n->lock);
- }
- read_unlock_bh(&arp_tbl.lock);
-}
-
-static __inline__ void arp_format_pneigh_table(struct seq_file *seq, int entry)
-{
- struct pneigh_entry *n;
-
- for (n = arp_tbl.phash_buckets[entry]; n; n = n->next) {
- struct net_device *dev = n->dev;
- int hatype = dev ? dev->type : 0;
- char tbuf[16];
-
- sprintf(tbuf, "%u.%u.%u.%u", NIPQUAD(*(u32*)n->key));
- seq_printf(seq, "%-16s 0x%-10x0x%-10x%s"
- " * %s\n",
- tbuf, hatype, ATF_PUBL | ATF_PERM,
- "00:00:00:00:00:00",
- dev ? dev->name : "*");
}
+#endif
+ sprintf(tbuf, "%u.%u.%u.%u", NIPQUAD(*(u32*)n->primary_key));
+ seq_printf(seq, "%-16s 0x%-10x0x%-10x%s * %s\n",
+ tbuf, hatype, arp_state_to_flags(n), hbuffer, dev->name);
+ read_unlock(&n->lock);
}
-static int arp_seq_show(struct seq_file *seq, void *v)
+static __inline__ void arp_format_pneigh_entry(struct seq_file *seq,
+ struct pneigh_entry *n)
{
- unsigned long l = (unsigned long)v - 1;
- if (!l)
+ struct net_device *dev = n->dev;
+ int hatype = dev ? dev->type : 0;
+ char tbuf[16];
+
+ sprintf(tbuf, "%u.%u.%u.%u", NIPQUAD(*(u32*)n->key));
+ seq_printf(seq, "%-16s 0x%-10x0x%-10x%s * %s\n",
+ tbuf, hatype, ATF_PUBL | ATF_PERM, "00:00:00:00:00:00",
+ dev ? dev->name : "*");
+}
+
+static int arp_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == (void *)1)
seq_puts(seq, "IP address HW type Flags "
"HW address Mask Device\n");
-
- if (l <= NEIGH_HASHMASK)
- arp_format_neigh_table(seq, l);
- else
- arp_format_pneigh_table(seq, l - NEIGH_HASHMASK);
+ else {
+ if (seq->private)
+ arp_format_pneigh_entry(seq, v);
+ else
+ arp_format_neigh_entry(seq, v);
+ }
return 0;
}
===================================================================
This BitKeeper patch contains the following changesets:
1.859
## Wrapped with gzip_uu ##
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-
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