[PATCH] ipv4: convert /proc/net/udp to seq_file

From: Arnaldo Carvalho de Melo (acme@conectiva.com.br)
Date: Sun Oct 13 2002 - 07:48:57 EST


Hi David,

        Please consider pulling from:

master.kernel.org:/home/acme/BK/ip-2.5

        Now there are two outstanding changesets there.

Best Regards,

- 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@1.835, 2002-10-13 23:45:25-02:00, acme@conectiva.com.br
  o ipv4: convert /proc/net/udp to seq_file
  
  Also make some functions and structs static, as they're only used in
  ip_proc.c

 ip_proc.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 udp.c | 61 -------------------------------------------
 2 files changed, 82 insertions(+), 66 deletions(-)

diff -Nru a/net/ipv4/ip_proc.c b/net/ipv4/ip_proc.c
--- a/net/ipv4/ip_proc.c Sun Oct 13 23:45:58 2002
+++ b/net/ipv4/ip_proc.c Sun Oct 13 23:45:58 2002
@@ -18,6 +18,7 @@
 #include <linux/netdevice.h>
 #include <net/neighbour.h>
 #include <net/arp.h>
+#include <net/udp.h>
 #include <linux/rtnetlink.h>
 #include <linux/route.h>
 #include <net/ip_fib.h>
@@ -29,7 +30,6 @@
 extern int netstat_get_info(char *, char **, off_t, int);
 extern int afinet_get_info(char *, char **, off_t, int);
 extern int tcp_get_info(char *, char **, off_t, int);
-extern int udp_get_info(char *, char **, off_t, int);
 
 #ifdef CONFIG_PROC_FS
 #ifdef CONFIG_AX25
@@ -38,7 +38,7 @@
 /*
  * ax25 -> ASCII conversion
  */
-char *ax2asc2(ax25_address *a, char *buf)
+static char *ax2asc2(ax25_address *a, char *buf)
 {
         char c, *s;
         int n;
@@ -198,20 +198,81 @@
 
 /* ------------------------------------------------------------------------ */
 
-struct seq_operations arp_seq_ops = {
+static void *udp_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock(&udp_hash_lock);
+ return (void *)(unsigned long)++*pos;
+}
+
+static void *udp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ return (void *)(unsigned long)((++*pos) >=
+ (UDP_HTABLE_SIZE - 1) ? 0 : *pos);
+}
+
+static void udp_seq_stop(struct seq_file *seq, void *v)
+{
+ read_unlock(&udp_hash_lock);
+}
+
+static void udp_format_sock(struct sock *sp, char *tmpbuf, int i)
+{
+ struct inet_opt *inet = inet_sk(sp);
+ unsigned int dest = inet->daddr;
+ unsigned int src = inet->rcv_saddr;
+ __u16 destp = ntohs(inet->dport);
+ __u16 srcp = ntohs(inet->sport);
+
+ sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X"
+ " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p",
+ i, src, srcp, dest, destp, sp->state,
+ atomic_read(&sp->wmem_alloc), atomic_read(&sp->rmem_alloc),
+ 0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
+ atomic_read(&sp->refcnt), sp);
+}
+
+static int udp_seq_show(struct seq_file *seq, void *v)
+{
+ char tmpbuf[129];
+ struct sock *sk;
+ unsigned long l = (unsigned long)v - 1;
+
+ if (!l)
+ seq_printf(seq, "%-127s\n",
+ " sl local_address rem_address st tx_queue "
+ "rx_queue tr tm->when retrnsmt uid timeout inode");
+
+ for (sk = udp_hash[l]; sk; sk = sk->next) {
+ if (sk->family != PF_INET)
+ continue;
+ udp_format_sock(sk, tmpbuf, l);
+ seq_printf(seq, "%-127s\n", tmpbuf);
+ }
+ return 0;
+}
+/* ------------------------------------------------------------------------ */
+
+static struct seq_operations arp_seq_ops = {
         .start = arp_seq_start,
         .next = arp_seq_next,
         .stop = arp_seq_stop,
         .show = arp_seq_show,
 };
 
-struct seq_operations fib_seq_ops = {
+static struct seq_operations fib_seq_ops = {
         .start = fib_seq_start,
         .next = fib_seq_next,
         .stop = fib_seq_stop,
         .show = fib_seq_show,
 };
 
+static struct seq_operations udp_seq_ops = {
+ .start = udp_seq_start,
+ .next = udp_seq_next,
+ .stop = udp_seq_stop,
+ .show = udp_seq_show,
+};
+
 static int arp_seq_open(struct inode *inode, struct file *file)
 {
         return seq_open(file, &arp_seq_ops);
@@ -222,6 +283,11 @@
         return seq_open(file, &fib_seq_ops);
 }
 
+static int udp_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &udp_seq_ops);
+}
+
 static struct file_operations arp_seq_fops = {
         .open = arp_seq_open,
         .read = seq_read,
@@ -236,6 +302,13 @@
         .release = seq_release,
 };
 
+static struct file_operations udp_seq_fops = {
+ .open = udp_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
 /* ------------------------------------------------------------------------ */
 
 int __init ipv4_proc_init(void)
@@ -258,8 +331,10 @@
         if (!proc_net_create("tcp", 0, tcp_get_info))
                 goto out_tcp;
 
- if (!proc_net_create("udp", 0, udp_get_info))
+ p = create_proc_entry("udp", S_IRUGO, proc_net);
+ if (!p)
                 goto out_udp;
+ p->proc_fops = &udp_seq_fops;
 
         p = create_proc_entry("arp", S_IRUGO, proc_net);
         if (!p)
@@ -275,7 +350,7 @@
 out_route:
         remove_proc_entry("route", proc_net);
 out_arp:
- proc_net_remove("udp");
+ remove_proc_entry("udp", proc_net);
 out_udp:
         proc_net_remove("tcp");
 out_tcp:
diff -Nru a/net/ipv4/udp.c b/net/ipv4/udp.c
--- a/net/ipv4/udp.c Sun Oct 13 23:45:58 2002
+++ b/net/ipv4/udp.c Sun Oct 13 23:45:58 2002
@@ -61,6 +61,7 @@
  * return ENOTCONN for unconnected sockets (POSIX)
  * Janos Farkas : don't deliver multi/broadcasts to a different
  * bound-to-device socket
+ * Arnaldo C. Melo : move proc routines to ip_proc.c.
  *
  *
  * This program is free software; you can redistribute it and/or
@@ -982,66 +983,6 @@
         UDP_INC_STATS_BH(UdpInErrors);
         kfree_skb(skb);
         return(0);
-}
-
-static void get_udp_sock(struct sock *sp, char *tmpbuf, int i)
-{
- struct inet_opt *inet = inet_sk(sp);
- unsigned int dest, src;
- __u16 destp, srcp;
-
- dest = inet->daddr;
- src = inet->rcv_saddr;
- destp = ntohs(inet->dport);
- srcp = ntohs(inet->sport);
- sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X"
- " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p",
- i, src, srcp, dest, destp, sp->state,
- atomic_read(&sp->wmem_alloc), atomic_read(&sp->rmem_alloc),
- 0, 0L, 0,
- sock_i_uid(sp), 0,
- sock_i_ino(sp),
- atomic_read(&sp->refcnt), sp);
-}
-
-int udp_get_info(char *buffer, char **start, off_t offset, int length)
-{
- int len = 0, num = 0, i;
- off_t pos = 0;
- off_t begin;
- char tmpbuf[129];
-
- if (offset < 128)
- len += sprintf(buffer, "%-127s\n",
- " sl local_address rem_address st tx_queue "
- "rx_queue tr tm->when retrnsmt uid timeout inode");
- pos = 128;
- read_lock(&udp_hash_lock);
- for (i = 0; i < UDP_HTABLE_SIZE; i++) {
- struct sock *sk;
-
- for (sk = udp_hash[i]; sk; sk = sk->next, num++) {
- if (sk->family != PF_INET)
- continue;
- pos += 128;
- if (pos <= offset)
- continue;
- get_udp_sock(sk, tmpbuf, i);
- len += sprintf(buffer+len, "%-127s\n", tmpbuf);
- if(len >= length)
- goto out;
- }
- }
-out:
- read_unlock(&udp_hash_lock);
- begin = len - (pos - offset);
- *start = buffer + begin;
- len -= begin;
- if(len > length)
- len = length;
- if (len < 0)
- len = 0;
- return len;
 }
 
 struct proto udp_prot = {

===================================================================

This BitKeeper patch contains the following changesets:
1.835
## Wrapped with gzip_uu ##

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`
end
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