[PATCH] /proc/net/ipconfig seq_file.

[Stephen Hemminger <shemminger@xxxxxxxx>]

Convert /proc/net/ipconfig to seq_file.

diff -Nru a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c
--- a/net/ipv4/ipconfig.c       Thu Sep 11 15:50:41 2003
+++ b/net/ipv4/ipconfig.c       Thu Sep 11 15:50:41 2003
@@ -50,6 +50,7 @@
 #include <linux/route.h>
 #include <linux/udp.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/major.h>
 #include <linux/root_dev.h>
 #include <net/arp.h>
@@ -1091,44 +1092,45 @@
 #endif /* IPCONFIG_DYNAMIC */
 
 #ifdef CONFIG_PROC_FS
-
-static int pnp_get_info(char *buffer, char **start,
-                       off_t offset, int length)
+static int pnp_seq_show(struct seq_file *seq, void *v)
 {
-       int len;
-       int i;
+       int i;
 
        if (ic_proto_used & IC_PROTO)
-           sprintf(buffer, "#PROTO: %s\n",
-                   (ic_proto_used & IC_RARP) ? "RARP"
-                   : (ic_proto_used & IC_USE_DHCP) ? "DHCP" : "BOOTP");
+               seq_printf(seq, "#PROTO: %s\n",
+                          (ic_proto_used & IC_RARP) ? "RARP"
+                          : (ic_proto_used & IC_USE_DHCP) ? "DHCP" : "BOOTP");
        else
-           strcpy(buffer, "#MANUAL\n");
-       len = strlen(buffer);
+               seq_puts(seq, "#MANUAL\n");
 
        if (ic_domain[0])
-               len += sprintf(buffer + len,
+               seq_printf(seq, 
                               "domain %s\n", ic_domain);
        for (i = 0; i < CONF_NAMESERVERS_MAX; i++) {
                if (ic_nameservers[i] != INADDR_NONE)
-                       len += sprintf(buffer + len,
-                                      "nameserver %u.%u.%u.%u\n",
-                                      NIPQUAD(ic_nameservers[i]));
+                       seq_printf(seq, "nameserver %u.%u.%u.%u\n",
+                                  NIPQUAD(ic_nameservers[i]));
        }
        if (ic_servaddr != INADDR_NONE)
-               len += sprintf(buffer + len,
-                              "bootserver %u.%u.%u.%u\n",
-                              NIPQUAD(ic_servaddr));
-
-       if (offset > len)
-               offset = len;
-       *start = buffer + offset;
-
-       if (offset + length > len)
-               length = len - offset;
-       return length;
+               seq_printf(seq, "bootserver %u.%u.%u.%u\n",
+                          NIPQUAD(ic_servaddr));
+
+       return 0;
 }
 
+static int pnp_seq_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, pnp_seq_show, NULL);
+}
+
+static struct file_operations pnp_seq_fops = {
+       .owner   = THIS_MODULE,
+       .open    = pnp_seq_open,
+       .read    = seq_read,
+       .llseek  = seq_lseek,
+       .release = single_release,
+};
+
 #endif /* CONFIG_PROC_FS */
 
 /*
@@ -1140,7 +1142,7 @@
        unsigned long jiff;
 
 #ifdef CONFIG_PROC_FS
-       proc_net_create("pnp", 0, pnp_get_info);
+       proc_net_fops_create("pnp", S_IRUGO, &pnp_seq_fops);
 #endif /* CONFIG_PROC_FS */
 
        if (!ic_enable)