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[PKTGEN]: proc interface revision 

The code to handle the /proc interface can be cleaned up in several places:
* use seq_file for read
* don't need to remember all the filenames separately
* use for_online_cpu's
* don't vmalloc a buffer for small command from user.

Committer note:
This patch clashed with John Hawkes's "[NET]: Wider use of for_each_*cpu()",
so I fixed it up manually.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
This commit is contained in:
Stephen Hemminger 2005-10-14 15:42:33 -07:00 committed by Arnaldo Carvalho de Melo
parent b4099fab75
commit d50a6b56f0
1 changed files with 215 additions and 257 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

472
net/core/pktgen.c
View File

@ -137,6 +137,7 @@
#include <linux/ipv6.h>
#include <linux/udp.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/wait.h>
#include <net/checksum.h>
#include <net/ipv6.h>
@ -151,7 +152,7 @@
#include <asm/timex.h>
#define VERSION "pktgen v2.62: Packet Generator for packet performance testing.\n"
#define VERSION "pktgen v2.63: Packet Generator for packet performance testing.\n"
/* #define PG_DEBUG(a) a */
#define PG_DEBUG(a)
@ -186,7 +187,9 @@
/* Used to help with determining the pkts on receive */
#define PKTGEN_MAGIC 0xbe9be955
#define PG_PROC_DIR "net/pktgen"
#define PG_PROC_DIR "pktgen"
#define PGCTRL "pgctrl"
static struct proc_dir_entry *pg_proc_dir = NULL;
#define MAX_CFLOWS 65536
@ -202,11 +205,8 @@ struct pktgen_dev {
* Try to keep frequent/infrequent used vars. separated.
*/
char ifname[32];
struct proc_dir_entry *proc_ent;
char ifname[IFNAMSIZ];
char result[512];
/* proc file names */
char fname[80];
struct pktgen_thread* pg_thread; /* the owner */
struct pktgen_dev *next; /* Used for chaining in the thread's run-queue */
@ -330,8 +330,6 @@ struct pktgen_thread {
struct pktgen_dev *if_list; /* All device here */
struct pktgen_thread* next;
char name[32];
char fname[128]; /* name of proc file */
struct proc_dir_entry *proc_ent;
char result[512];
u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
@ -473,16 +471,6 @@ static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b)
static char version[] __initdata = VERSION;
static ssize_t proc_pgctrl_read(struct file* file, char __user * buf, size_t count, loff_t *ppos);
static ssize_t proc_pgctrl_write(struct file* file, const char __user * buf, size_t count, loff_t *ppos);
static int proc_if_read(char *buf , char **start, off_t offset, int len, int *eof, void *data);
static int proc_thread_read(char *buf , char **start, off_t offset, int len, int *eof, void *data);
static int proc_if_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data);
static int proc_thread_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data);
static int create_proc_dir(void);
static int remove_proc_dir(void);
static int pktgen_remove_device(struct pktgen_thread* t, struct pktgen_dev *i);
static int pktgen_add_device(struct pktgen_thread* t, const char* ifname);
static struct pktgen_thread* pktgen_find_thread(const char* name);
@ -506,80 +494,38 @@ static int debug = 0;
static DECLARE_MUTEX(pktgen_sem);
static struct pktgen_thread *pktgen_threads = NULL;
static char module_fname[128];
static struct proc_dir_entry *module_proc_ent = NULL;
static struct notifier_block pktgen_notifier_block = {
.notifier_call = pktgen_device_event,
};
static struct file_operations pktgen_fops = {
.read = proc_pgctrl_read,
.write = proc_pgctrl_write,
/* .ioctl = pktgen_ioctl, later maybe */
};
/*
* /proc handling functions
*
*/
static struct proc_dir_entry *pg_proc_dir = NULL;
static int proc_pgctrl_read_eof=0;
static ssize_t proc_pgctrl_read(struct file* file, char __user * buf,
size_t count, loff_t *ppos)
static int pgctrl_show(struct seq_file *seq, void *v)
{
char data[200];
int len = 0;
if(proc_pgctrl_read_eof) {
proc_pgctrl_read_eof=0;
len = 0;
goto out;
}
sprintf(data, "%s", VERSION);
len = strlen(data);
if(len > count) {
len = -EFAULT;
goto out;
}
if (copy_to_user(buf, data, len)) {
len = -EFAULT;
goto out;
}
*ppos += len;
proc_pgctrl_read_eof=1; /* EOF next call */
out:
return len;
seq_puts(seq, VERSION);
return 0;
}
static ssize_t proc_pgctrl_write(struct file* file,const char __user * buf,
size_t count, loff_t *ppos)
static ssize_t pgctrl_write(struct file* file,const char __user * buf,
size_t count, loff_t *ppos)
{
char *data = NULL;
int err = 0;
char data[128];
if (!capable(CAP_NET_ADMIN)){
err = -EPERM;
goto out;
}
data = (void*)vmalloc ((unsigned int)count);
if (count > sizeof(data))
count = sizeof(data);
if(!data) {
err = -ENOMEM;
goto out;
}
if (copy_from_user(data, buf, count)) {
err = -EFAULT;
goto out_free;
goto out;
}
data[count-1] = 0; /* Make string */
@ -594,31 +540,40 @@ static ssize_t proc_pgctrl_write(struct file* file,const char __user * buf,
err = count;
out_free:
vfree (data);
out:
return err;
}
static int proc_if_read(char *buf , char **start, off_t offset,
int len, int *eof, void *data)
static int pgctrl_open(struct inode *inode, struct file *file)
{
return single_open(file, pgctrl_show, PDE(inode)->data);
}
static struct file_operations pktgen_fops = {
.owner = THIS_MODULE,
.open = pgctrl_open,
.read = seq_read,
.llseek = seq_lseek,
.write = pgctrl_write,
.release = single_release,
};
static int pktgen_if_show(struct seq_file *seq, void *v)
{
char *p;
int i;
struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data);
struct pktgen_dev *pkt_dev = seq->private;
__u64 sa;
__u64 stopped;
__u64 now = getCurUs();
p = buf;
p += sprintf(p, "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
(unsigned long long) pkt_dev->count,
pkt_dev->min_pkt_size, pkt_dev->max_pkt_size);
seq_printf(seq, "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
(unsigned long long) pkt_dev->count,
pkt_dev->min_pkt_size, pkt_dev->max_pkt_size);
p += sprintf(p, " frags: %d delay: %u clone_skb: %d ifname: %s\n",
pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname);
seq_printf(seq, " frags: %d delay: %u clone_skb: %d ifname: %s\n",
pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname);
p += sprintf(p, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow);
seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow);
if(pkt_dev->flags & F_IPV6) {
@ -626,19 +581,19 @@ static int proc_if_read(char *buf , char **start, off_t offset,
fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
p += sprintf(p, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3);
seq_printf(seq, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3);
fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
p += sprintf(p, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3);
seq_printf(seq, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3);
}
else
p += sprintf(p, " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max);
seq_printf(seq," dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max);
p += sprintf(p, " src_mac: ");
seq_puts(seq, " src_mac: ");
if ((pkt_dev->src_mac[0] == 0) &&
(pkt_dev->src_mac[1] == 0) &&
@ -648,89 +603,89 @@ static int proc_if_read(char *buf , char **start, off_t offset,
(pkt_dev->src_mac[5] == 0))
for (i = 0; i < 6; i++)
p += sprintf(p, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":");
seq_printf(seq, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":");
else
for (i = 0; i < 6; i++)
p += sprintf(p, "%02X%s", pkt_dev->src_mac[i], i == 5 ? " " : ":");
seq_printf(seq, "%02X%s", pkt_dev->src_mac[i], i == 5 ? " " : ":");
p += sprintf(p, "dst_mac: ");
seq_printf(seq, "dst_mac: ");
for (i = 0; i < 6; i++)
p += sprintf(p, "%02X%s", pkt_dev->dst_mac[i], i == 5 ? "\n" : ":");
seq_printf(seq, "%02X%s", pkt_dev->dst_mac[i], i == 5 ? "\n" : ":");
p += sprintf(p, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
pkt_dev->udp_src_min, pkt_dev->udp_src_max, pkt_dev->udp_dst_min,
pkt_dev->udp_dst_max);
seq_printf(seq, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
pkt_dev->udp_src_min, pkt_dev->udp_src_max, pkt_dev->udp_dst_min,
pkt_dev->udp_dst_max);
p += sprintf(p, " src_mac_count: %d dst_mac_count: %d \n Flags: ",
pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
seq_printf(seq, " src_mac_count: %d dst_mac_count: %d \n Flags: ",
pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
if (pkt_dev->flags & F_IPV6)
p += sprintf(p, "IPV6 ");
seq_printf(seq, "IPV6 ");
if (pkt_dev->flags & F_IPSRC_RND)
p += sprintf(p, "IPSRC_RND ");
seq_printf(seq, "IPSRC_RND ");
if (pkt_dev->flags & F_IPDST_RND)
p += sprintf(p, "IPDST_RND ");
seq_printf(seq, "IPDST_RND ");
if (pkt_dev->flags & F_TXSIZE_RND)
p += sprintf(p, "TXSIZE_RND ");
seq_printf(seq, "TXSIZE_RND ");
if (pkt_dev->flags & F_UDPSRC_RND)
p += sprintf(p, "UDPSRC_RND ");
seq_printf(seq, "UDPSRC_RND ");
if (pkt_dev->flags & F_UDPDST_RND)
p += sprintf(p, "UDPDST_RND ");
seq_printf(seq, "UDPDST_RND ");
if (pkt_dev->flags & F_MACSRC_RND)
p += sprintf(p, "MACSRC_RND ");
seq_printf(seq, "MACSRC_RND ");
if (pkt_dev->flags & F_MACDST_RND)
p += sprintf(p, "MACDST_RND ");
seq_printf(seq, "MACDST_RND ");
p += sprintf(p, "\n");
seq_puts(seq, "\n");
sa = pkt_dev->started_at;
stopped = pkt_dev->stopped_at;
if (pkt_dev->running)
stopped = now; /* not really stopped, more like last-running-at */
p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
(unsigned long long) pkt_dev->sofar,
(unsigned long long) pkt_dev->errors,
(unsigned long long) sa,
(unsigned long long) stopped,
(unsigned long long) pkt_dev->idle_acc);
seq_printf(seq, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
(unsigned long long) pkt_dev->sofar,
(unsigned long long) pkt_dev->errors,
(unsigned long long) sa,
(unsigned long long) stopped,
(unsigned long long) pkt_dev->idle_acc);
p += sprintf(p, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, pkt_dev->cur_src_mac_offset);
seq_printf(seq, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset,
pkt_dev->cur_src_mac_offset);
if(pkt_dev->flags & F_IPV6) {
char b1[128], b2[128];
fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
p += sprintf(p, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
seq_printf(seq, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
}
else
p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
pkt_dev->cur_saddr, pkt_dev->cur_daddr);
seq_printf(seq, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
pkt_dev->cur_saddr, pkt_dev->cur_daddr);
p += sprintf(p, " cur_udp_dst: %d cur_udp_src: %d\n",
pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
p += sprintf(p, " flows: %u\n", pkt_dev->nflows);
seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
if (pkt_dev->result[0])
p += sprintf(p, "Result: %s\n", pkt_dev->result);
seq_printf(seq, "Result: %s\n", pkt_dev->result);
else
p += sprintf(p, "Result: Idle\n");
*eof = 1;
seq_printf(seq, "Result: Idle\n");
return p - buf;
return 0;
}
@ -802,13 +757,14 @@ static int strn_len(const char __user *user_buffer, unsigned int maxlen)
return i;
}
static int proc_if_write(struct file *file, const char __user *user_buffer,
unsigned long count, void *data)
static ssize_t pktgen_if_write(struct file *file, const char __user *user_buffer,
size_t count, loff_t *offset)
{
struct seq_file *seq = (struct seq_file *) file->private_data;
struct pktgen_dev *pkt_dev = seq->private;
int i = 0, max, len;
char name[16], valstr[32];
unsigned long value = 0;
struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data);
char* pg_result = NULL;
int tmp = 0;
char buf[128];
@ -849,7 +805,8 @@ static int proc_if_write(struct file *file, const char __user *user_buffer,
if (copy_from_user(tb, user_buffer, count))
return -EFAULT;
tb[count] = 0;
printk("pktgen: %s,%lu buffer -:%s:-\n", name, count, tb);
printk("pktgen: %s,%lu buffer -:%s:-\n", name,
(unsigned long) count, tb);
}
if (!strcmp(name, "min_pkt_size")) {
@ -1335,92 +1292,98 @@ static int proc_if_write(struct file *file, const char __user *user_buffer,
return -EINVAL;
}
static int proc_thread_read(char *buf , char **start, off_t offset,
int len, int *eof, void *data)
static int pktgen_if_open(struct inode *inode, struct file *file)
{
char *p;
struct pktgen_thread *t = (struct pktgen_thread*)(data);
return single_open(file, pktgen_if_show, PDE(inode)->data);
}
static struct file_operations pktgen_if_fops = {
.owner = THIS_MODULE,
.open = pktgen_if_open,
.read = seq_read,
.llseek = seq_lseek,
.write = pktgen_if_write,
.release = single_release,
};
static int pktgen_thread_show(struct seq_file *seq, void *v)
{
struct pktgen_thread *t = seq->private;
struct pktgen_dev *pkt_dev = NULL;
BUG_ON(!t);
if (!t) {
printk("pktgen: ERROR: could not find thread in proc_thread_read\n");
return -EINVAL;
}
p = buf;
p += sprintf(p, "Name: %s max_before_softirq: %d\n",
seq_printf(seq, "Name: %s max_before_softirq: %d\n",
t->name, t->max_before_softirq);
p += sprintf(p, "Running: ");
seq_printf(seq, "Running: ");
if_lock(t);
for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
if(pkt_dev->running)
p += sprintf(p, "%s ", pkt_dev->ifname);
seq_printf(seq, "%s ", pkt_dev->ifname);
p += sprintf(p, "\nStopped: ");
seq_printf(seq, "\nStopped: ");
for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
if(!pkt_dev->running)
p += sprintf(p, "%s ", pkt_dev->ifname);
seq_printf(seq, "%s ", pkt_dev->ifname);
if (t->result[0])
p += sprintf(p, "\nResult: %s\n", t->result);
seq_printf(seq, "\nResult: %s\n", t->result);
else
p += sprintf(p, "\nResult: NA\n");
*eof = 1;
seq_printf(seq, "\nResult: NA\n");
if_unlock(t);
return p - buf;
return 0;
}
static int proc_thread_write(struct file *file, const char __user *user_buffer,
unsigned long count, void *data)
static ssize_t pktgen_thread_write(struct file *file,
const char __user *user_buffer,
size_t count, loff_t *offset)
{
struct seq_file *seq = (struct seq_file *) file->private_data;
struct pktgen_thread *t = seq->private;
int i = 0, max, len, ret;
char name[40];
struct pktgen_thread *t;
char *pg_result;
unsigned long value = 0;
if (count < 1) {
// sprintf(pg_result, "Wrong command format");
return -EINVAL;
}
max = count - i;
len = count_trail_chars(&user_buffer[i], max);
if (len < 0)
return len;
if (len < 0)
return len;
i += len;
/* Read variable name */
len = strn_len(&user_buffer[i], sizeof(name) - 1);
if (len < 0)
return len;
if (len < 0)
return len;
memset(name, 0, sizeof(name));
if (copy_from_user(name, &user_buffer[i], len))
return -EFAULT;
i += len;
max = count -i;
len = count_trail_chars(&user_buffer[i], max);
if (len < 0)
return len;
if (len < 0)
return len;
i += len;
if (debug)
printk("pktgen: t=%s, count=%lu\n", name, count);
if (debug)
printk("pktgen: t=%s, count=%lu\n", name,
(unsigned long) count);
t = (struct pktgen_thread*)(data);
if(!t) {
printk("pktgen: ERROR: No thread\n");
ret = -EINVAL;
@ -1474,21 +1437,19 @@ static int proc_thread_write(struct file *file, const char __user *user_buffer,
return ret;
}
static int create_proc_dir(void)
static int pktgen_thread_open(struct inode *inode, struct file *file)
{
pg_proc_dir = proc_mkdir(PG_PROC_DIR, NULL);
if (!pg_proc_dir)
return -ENODEV;
return 0;
return single_open(file, pktgen_thread_show, PDE(inode)->data);
}
static int remove_proc_dir(void)
{
remove_proc_entry(PG_PROC_DIR, NULL);
return 0;
}
static struct file_operations pktgen_thread_fops = {
.owner = THIS_MODULE,
.open = pktgen_thread_open,
.read = seq_read,
.llseek = seq_lseek,
.write = pktgen_thread_write,
.release = single_release,
};
/* Think find or remove for NN */
static struct pktgen_dev *__pktgen_NN_threads(const char* ifname, int remove)
@ -2552,8 +2513,7 @@ static void pktgen_rem_thread(struct pktgen_thread *t)
struct pktgen_thread *tmp = pktgen_threads;
if (strlen(t->fname))
remove_proc_entry(t->fname, NULL);
remove_proc_entry(t->name, pg_proc_dir);
thread_lock();
@ -2825,7 +2785,7 @@ static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, const char* i
if_lock(t);
for(pkt_dev=t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
if (strcmp(pkt_dev->ifname, ifname) == 0) {
if (strncmp(pkt_dev->ifname, ifname, IFNAMSIZ) == 0) {
break;
}
}
@ -2864,65 +2824,63 @@ static int add_dev_to_thread(struct pktgen_thread *t, struct pktgen_dev *pkt_dev
static int pktgen_add_device(struct pktgen_thread *t, const char* ifname)
{
struct pktgen_dev *pkt_dev;
struct proc_dir_entry *pe;
/* We don't allow a device to be on several threads */
if( (pkt_dev = __pktgen_NN_threads(ifname, FIND)) == NULL) {
pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
if (!pkt_dev)
return -ENOMEM;
pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state));
if (pkt_dev->flows == NULL) {
kfree(pkt_dev);
return -ENOMEM;
}
memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state));
pkt_dev->min_pkt_size = ETH_ZLEN;
pkt_dev->max_pkt_size = ETH_ZLEN;
pkt_dev->nfrags = 0;
pkt_dev->clone_skb = pg_clone_skb_d;
pkt_dev->delay_us = pg_delay_d / 1000;
pkt_dev->delay_ns = pg_delay_d % 1000;
pkt_dev->count = pg_count_d;
pkt_dev->sofar = 0;
pkt_dev->udp_src_min = 9; /* sink port */
pkt_dev->udp_src_max = 9;
pkt_dev->udp_dst_min = 9;
pkt_dev->udp_dst_max = 9;
strncpy(pkt_dev->ifname, ifname, 31);
sprintf(pkt_dev->fname, "%s/%s", PG_PROC_DIR, ifname);
if (! pktgen_setup_dev(pkt_dev)) {
printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
if (pkt_dev->flows)
vfree(pkt_dev->flows);
kfree(pkt_dev);
return -ENODEV;
}
pkt_dev->proc_ent = create_proc_entry(pkt_dev->fname, 0600, NULL);
if (!pkt_dev->proc_ent) {
printk("pktgen: cannot create %s procfs entry.\n", pkt_dev->fname);
if (pkt_dev->flows)
vfree(pkt_dev->flows);
kfree(pkt_dev);
return -EINVAL;
}
pkt_dev->proc_ent->read_proc = proc_if_read;
pkt_dev->proc_ent->write_proc = proc_if_write;
pkt_dev->proc_ent->data = (void*)(pkt_dev);
pkt_dev->proc_ent->owner = THIS_MODULE;
return add_dev_to_thread(t, pkt_dev);
}
else {
pkt_dev = __pktgen_NN_threads(ifname, FIND);
if (pkt_dev) {
printk("pktgen: ERROR: interface already used.\n");
return -EBUSY;
}
pkt_dev = kzalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
if (!pkt_dev)
return -ENOMEM;
pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state));
if (pkt_dev->flows == NULL) {
kfree(pkt_dev);
return -ENOMEM;
}
memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state));
pkt_dev->min_pkt_size = ETH_ZLEN;
pkt_dev->max_pkt_size = ETH_ZLEN;
pkt_dev->nfrags = 0;
pkt_dev->clone_skb = pg_clone_skb_d;
pkt_dev->delay_us = pg_delay_d / 1000;
pkt_dev->delay_ns = pg_delay_d % 1000;
pkt_dev->count = pg_count_d;
pkt_dev->sofar = 0;
pkt_dev->udp_src_min = 9; /* sink port */
pkt_dev->udp_src_max = 9;
pkt_dev->udp_dst_min = 9;
pkt_dev->udp_dst_max = 9;
strncpy(pkt_dev->ifname, ifname, IFNAMSIZ);
if (! pktgen_setup_dev(pkt_dev)) {
printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
if (pkt_dev->flows)
vfree(pkt_dev->flows);
kfree(pkt_dev);
return -ENODEV;
}
pe = create_proc_entry(ifname, 0600, pg_proc_dir);
if (!pe) {
printk("pktgen: cannot create %s/%s procfs entry.\n",
PG_PROC_DIR, ifname);
if (pkt_dev->flows)
vfree(pkt_dev->flows);
kfree(pkt_dev);
return -EINVAL;
}
pe->proc_fops = &pktgen_if_fops;
pe->data = pkt_dev;
return add_dev_to_thread(t, pkt_dev);
}
static struct pktgen_thread *pktgen_find_thread(const char* name)
@ -2945,6 +2903,7 @@ static struct pktgen_thread *pktgen_find_thread(const char* name)
static int pktgen_create_thread(const char* name, int cpu)
{
struct pktgen_thread *t = NULL;
struct proc_dir_entry *pe;
if (strlen(name) > 31) {
printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
@ -2966,17 +2925,16 @@ static int pktgen_create_thread(const char* name, int cpu)
spin_lock_init(&t->if_lock);
t->cpu = cpu;
sprintf(t->fname, "%s/%s", PG_PROC_DIR, t->name);
t->proc_ent = create_proc_entry(t->fname, 0600, NULL);
if (!t->proc_ent) {
printk("pktgen: cannot create %s procfs entry.\n", t->fname);
pe = create_proc_entry(t->name, 0600, pg_proc_dir);
if (!pe) {
printk("pktgen: cannot create %s/%s procfs entry.\n",
PG_PROC_DIR, t->name);
kfree(t);
return -EINVAL;
}
t->proc_ent->read_proc = proc_thread_read;
t->proc_ent->write_proc = proc_thread_write;
t->proc_ent->data = (void*)(t);
t->proc_ent->owner = THIS_MODULE;
pe->proc_fops = &pktgen_thread_fops;
pe->data = t;
t->next = pktgen_threads;
pktgen_threads = t;
@ -3031,8 +2989,7 @@ static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_
/* Clean up proc file system */
if (strlen(pkt_dev->fname))
remove_proc_entry(pkt_dev->fname, NULL);
remove_proc_entry(pkt_dev->ifname, pg_proc_dir);
if (pkt_dev->flows)
vfree(pkt_dev->flows);
@ -3043,21 +3000,24 @@ static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_
static int __init pg_init(void)
{
int cpu;
struct proc_dir_entry *pe;
printk(version);
module_fname[0] = 0;
pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
if (!pg_proc_dir)
return -ENODEV;
pg_proc_dir->owner = THIS_MODULE;
create_proc_dir();
sprintf(module_fname, "%s/pgctrl", PG_PROC_DIR);
module_proc_ent = create_proc_entry(module_fname, 0600, NULL);
if (!module_proc_ent) {
printk("pktgen: ERROR: cannot create %s procfs entry.\n", module_fname);
pe = create_proc_entry(PGCTRL, 0600, pg_proc_dir);
if (pe == NULL) {
printk("pktgen: ERROR: cannot create %s procfs entry.\n", PGCTRL);
proc_net_remove(PG_PROC_DIR);
return -EINVAL;
}
module_proc_ent->proc_fops = &pktgen_fops;
module_proc_ent->data = NULL;
pe->proc_fops = &pktgen_fops;
pe->data = NULL;
/* Register us to receive netdevice events */
register_netdevice_notifier(&pktgen_notifier_block);
@ -3089,10 +3049,8 @@ static void __exit pg_cleanup(void)
unregister_netdevice_notifier(&pktgen_notifier_block);
/* Clean up proc file system */
remove_proc_entry(module_fname, NULL);
remove_proc_dir();
remove_proc_entry(PGCTRL, pg_proc_dir);
proc_net_remove(PG_PROC_DIR);
}