Linux 2.6.28-rc1

[linux-2.6-omap-h63xx.git] / arch / um / drivers / pcap_user.c

diff --git a/arch/um/drivers/pcap_user.c b/arch/um/drivers/pcap_user.c
index 2ef641ded960a96670456b5d2f1b56914a689c42..5f903587d69e4ae322672270c0bba17d2ec41295 100644 (file)
--- a/arch/um/drivers/pcap_user.c
+++ b/arch/um/drivers/pcap_user.c
@@ -1,37 +1,37 @@
 /*
- * Copyright (C) 2002 Jeff Dike <jdike@karaya.com>
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL.
  */
 
-#include <unistd.h>
-#include <stdlib.h>
-#include <string.h>
 #include <errno.h>
 #include <pcap.h>
+#include <string.h>
 #include <asm/types.h>
 #include "net_user.h"
 #include "pcap_user.h"
+#include "kern_constants.h"
+#include "um_malloc.h"
 #include "user.h"
 
-#define MAX_PACKET (ETH_MAX_PACKET + ETH_HEADER_OTHER)
-
 #define PCAP_FD(p) (*(int *)(p))
 
-static void pcap_user_init(void *data, void *dev)
+static int pcap_user_init(void *data, void *dev)
 {
        struct pcap_data *pri = data;
        pcap_t *p;
        char errors[PCAP_ERRBUF_SIZE];
 
-       p = pcap_open_live(pri->host_if, MAX_PACKET, pri->promisc, 0, errors);
-       if(p == NULL){
-               printk("pcap_user_init : pcap_open_live failed - '%s'\n", 
-                      errors);
-               return;
+       p = pcap_open_live(pri->host_if, ETH_MAX_PACKET + ETH_HEADER_OTHER,
+                          pri->promisc, 0, errors);
+       if (p == NULL) {
+               printk(UM_KERN_ERR "pcap_user_init : pcap_open_live failed - "
+                      "'%s'\n", errors);
+               return -EINVAL;
        }
 
        pri->dev = dev;
        pri->pcap = p;
+       return 0;
 }
 
 static int pcap_open(void *data)
@@ -40,50 +40,56 @@ static int pcap_open(void *data)
        __u32 netmask;
        int err;
 
-       if(pri->pcap == NULL)
-               return(-ENODEV);
+       if (pri->pcap == NULL)
+               return -ENODEV;
 
-       if(pri->filter != NULL){
+       if (pri->filter != NULL) {
                err = dev_netmask(pri->dev, &netmask);
-               if(err < 0){
-                       printk("pcap_open : dev_netmask failed\n");
-                       return(-EIO);
+               if (err < 0) {
+                       printk(UM_KERN_ERR "pcap_open : dev_netmask failed\n");
+                       return -EIO;
                }
 
-               pri->compiled = um_kmalloc(sizeof(struct bpf_program));
-               if(pri->compiled == NULL){
-                       printk("pcap_open : kmalloc failed\n");
-                       return(-ENOMEM);
+               pri->compiled = uml_kmalloc(sizeof(struct bpf_program),
+                                       UM_GFP_KERNEL);
+               if (pri->compiled == NULL) {
+                       printk(UM_KERN_ERR "pcap_open : kmalloc failed\n");
+                       return -ENOMEM;
                }
-               
-               err = pcap_compile(pri->pcap, 
-                                  (struct bpf_program *) pri->compiled, 
+
+               err = pcap_compile(pri->pcap,
+                                  (struct bpf_program *) pri->compiled,
                                   pri->filter, pri->optimize, netmask);
-               if(err < 0){
-                       printk("pcap_open : pcap_compile failed - '%s'\n", 
-                              pcap_geterr(pri->pcap));
-                       return(-EIO);
+               if (err < 0) {
+                       printk(UM_KERN_ERR "pcap_open : pcap_compile failed - "
+                              "'%s'\n", pcap_geterr(pri->pcap));
+                       goto out;
                }
 
                err = pcap_setfilter(pri->pcap, pri->compiled);
-               if(err < 0){
-                       printk("pcap_open : pcap_setfilter failed - '%s'\n", 
-                              pcap_geterr(pri->pcap));
-                       return(-EIO);
+               if (err < 0) {
+                       printk(UM_KERN_ERR "pcap_open : pcap_setfilter "
+                              "failed - '%s'\n", pcap_geterr(pri->pcap));
+                       goto out;
                }
        }
-       
-       return(PCAP_FD(pri->pcap));
+
+       return PCAP_FD(pri->pcap);
+
+ out:
+       kfree(pri->compiled);
+       return -EIO;
 }
 
 static void pcap_remove(void *data)
 {
        struct pcap_data *pri = data;
 
-       if(pri->compiled != NULL)
+       if (pri->compiled != NULL)
                pcap_freecode(pri->compiled);
 
-       pcap_close(pri->pcap);
+       if (pri->pcap != NULL)
+               pcap_close(pri->pcap);
 }
 
 struct pcap_handler_data {
@@ -91,7 +97,7 @@ struct pcap_handler_data {
        int len;
 };
 
-static void handler(u_char *data, const struct pcap_pkthdr *header, 
+static void handler(u_char *data, const struct pcap_pkthdr *header,
                    const u_char *packet)
 {
        int len;
@@ -111,13 +117,14 @@ int pcap_user_read(int fd, void *buffer, int len, struct pcap_data *pri)
        int n;
 
        n = pcap_dispatch(pri->pcap, 1, handler, (u_char *) &hdata);
-       if(n < 0){
-               printk("pcap_dispatch failed - %s\n", pcap_geterr(pri->pcap));
-               return(-EIO);
+       if (n < 0) {
+               printk(UM_KERN_ERR "pcap_dispatch failed - %s\n",
+                      pcap_geterr(pri->pcap));
+               return -EIO;
        }
-       else if(n == 0) 
-               return(0);
-       return(hdata.len);
+       else if (n == 0)
+               return 0;
+       return hdata.len;
 }
 
 const struct net_user_info pcap_user_info = {
@@ -125,19 +132,8 @@ const struct net_user_info pcap_user_info = {
        .open           = pcap_open,
        .close          = NULL,
        .remove         = pcap_remove,
-       .set_mtu        = NULL,
        .add_address    = NULL,
        .delete_address = NULL,
-       .max_packet     = MAX_PACKET - ETH_HEADER_OTHER
+       .mtu            = ETH_MAX_PACKET,
+       .max_packet     = ETH_MAX_PACKET + ETH_HEADER_OTHER,
 };
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */