#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/sys.h>
#include <linux/types.h>
#include <linux/minmax.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/unistd.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/hex.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/capability.h>
#include <linux/hrtimer.h>
#include <linux/freezer.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/init.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/inet.h>
#include <linux/inetdevice.h>
#include <linux/rtnetlink.h>
#include <linux/if_arp.h>
#include <linux/if_vlan.h>
#include <linux/in.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/udp.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/wait.h>
#include <linux/etherdevice.h>
#include <linux/kthread.h>
#include <linux/prefetch.h>
#include <linux/mmzone.h>
#include <net/net_namespace.h>
#include <net/checksum.h>
#include <net/ipv6.h>
#include <net/udp.h>
#include <net/ip6_checksum.h>
#include <net/addrconf.h>
#include <net/xfrm.h>
#include <net/netns/generic.h>
#include <asm/byteorder.h>
#include <linux/rcupdate.h>
#include <linux/bitops.h>
#include <linux/io.h>
#include <linux/timex.h>
#include <linux/uaccess.h>
#include <asm/dma.h>
#include <asm/div64.h>
#define VERSION "2.75"
#define IP_NAME_SZ 32
#define MAX_MPLS_LABELS 16
#define MPLS_STACK_BOTTOM htonl(0x00000100)
#define MAX_IMIX_ENTRIES 20
#define IMIX_PRECISION 100
#define func_enter() pr_debug("entering %s\n", __func__)
#define PKT_FLAGS \
pf(IPV6) \
pf(IPSRC_RND) \
pf(IPDST_RND) \
pf(TXSIZE_RND) \
pf(UDPSRC_RND) \
pf(UDPDST_RND) \
pf(UDPCSUM) \
pf(NO_TIMESTAMP) \
pf(MPLS_RND) \
pf(QUEUE_MAP_RND) \
pf(QUEUE_MAP_CPU) \
pf(FLOW_SEQ) \
pf(IPSEC) \
pf(MACSRC_RND) \
pf(MACDST_RND) \
pf(VID_RND) \
pf(SVID_RND) \
pf(NODE) \
pf(SHARED) \
#define pf(flag) flag##_SHIFT,
enum pkt_flags {
PKT_FLAGS
};
#undef pf
#define pf(flag) static const __u32 F_##flag = (1<<flag##_SHIFT);
PKT_FLAGS
#undef pf
#define pf(flag) __stringify(flag),
static char *pkt_flag_names[] = {
PKT_FLAGS
};
#undef pf
#define NR_PKT_FLAGS ARRAY_SIZE(pkt_flag_names)
#define T_STOP (1<<0)
#define T_RUN (1<<1)
#define T_REMDEVALL (1<<2)
#define T_REMDEV (1<<3)
#define M_START_XMIT 0
#define M_NETIF_RECEIVE 1
#define M_QUEUE_XMIT 2
#define if_lock(t) mutex_lock(&(t->if_lock))
#define if_unlock(t) mutex_unlock(&(t->if_lock))
#define PKTGEN_MAGIC 0xbe9be955
#define PG_PROC_DIR "pktgen"
#define PGCTRL "pgctrl"
#define MAX_CFLOWS 65536
#define VLAN_TAG_SIZE(x) ((x)->vlan_id == 0xffff ? 0 : 4)
#define SVLAN_TAG_SIZE(x) ((x)->svlan_id == 0xffff ? 0 : 4)
struct imix_pkt {
u64 size;
u64 weight;
u64 count_so_far;
};
struct flow_state {
__be32 cur_daddr;
int count;
#ifdef CONFIG_XFRM
struct xfrm_state *x;
#endif
__u32 flags;
};
#define F_INIT (1<<0)
struct pktgen_dev {
struct proc_dir_entry *entry;
struct pktgen_thread *pg_thread;
struct list_head list;
struct rcu_head rcu;
int running;
__u32 flags;
int xmit_mode;
int min_pkt_size;
int max_pkt_size;
int pkt_overhead;
int nfrags;
int removal_mark;
struct page *page;
u64 delay;
__u64 count;
__u64 sofar;
__u64 tx_bytes;
__u64 errors;
__u32 clone_count;
int last_ok;
ktime_t next_tx;
ktime_t started_at;
ktime_t stopped_at;
u64 idle_acc;
__u32 seq_num;
int clone_skb;
char dst_min[IP_NAME_SZ];
char dst_max[IP_NAME_SZ];
char src_min[IP_NAME_SZ];
char src_max[IP_NAME_SZ];
struct in6_addr in6_saddr;
struct in6_addr in6_daddr;
struct in6_addr cur_in6_daddr;
struct in6_addr cur_in6_saddr;
struct in6_addr min_in6_daddr;
struct in6_addr max_in6_daddr;
struct in6_addr min_in6_saddr;
struct in6_addr max_in6_saddr;
__be32 saddr_min;
__be32 saddr_max;
__be32 daddr_min;
__be32 daddr_max;
__u16 udp_src_min;
__u16 udp_src_max;
__u16 udp_dst_min;
__u16 udp_dst_max;
__u8 tos;
__u8 traffic_class;
unsigned int n_imix_entries;
struct imix_pkt imix_entries[MAX_IMIX_ENTRIES];
__u8 imix_distribution[IMIX_PRECISION];
unsigned int nr_labels;
__be32 labels[MAX_MPLS_LABELS];
__u8 vlan_p;
__u8 vlan_cfi;
__u16 vlan_id;
__u8 svlan_p;
__u8 svlan_cfi;
__u16 svlan_id;
__u32 src_mac_count;
__u32 dst_mac_count;
unsigned char dst_mac[ETH_ALEN];
unsigned char src_mac[ETH_ALEN];
__u32 cur_dst_mac_offset;
__u32 cur_src_mac_offset;
__be32 cur_saddr;
__be32 cur_daddr;
__u16 ip_id;
__u16 cur_udp_dst;
__u16 cur_udp_src;
__u16 cur_queue_map;
__u32 cur_pkt_size;
__u32 last_pkt_size;
__u8 hh[14];
__u16 pad;
struct sk_buff *skb;
struct net_device *odev;
netdevice_tracker dev_tracker;
char odevname[32];
struct flow_state *flows;
unsigned int cflows;
unsigned int lflow;
unsigned int nflows;
unsigned int curfl;
u16 queue_map_min;
u16 queue_map_max;
__u32 skb_priority;
unsigned int burst;
int node;
#ifdef CONFIG_XFRM
__u8 ipsmode;
__u8 ipsproto;
__u32 spi;
struct xfrm_dst xdst;
struct dst_ops dstops;
#endif
char result[512];
};
struct pktgen_hdr {
__be32 pgh_magic;
__be32 seq_num;
__be32 tv_sec;
__be32 tv_usec;
};
static unsigned int pg_net_id __read_mostly;
struct pktgen_net {
struct net *net;
struct proc_dir_entry *proc_dir;
struct list_head pktgen_threads;
bool pktgen_exiting;
};
struct pktgen_thread {
struct mutex if_lock;
struct list_head if_list;
struct list_head th_list;
struct task_struct *tsk;
char result[512];
u32 control;
int cpu;
wait_queue_head_t queue;
struct completion start_done;
struct pktgen_net *net;
};
#define REMOVE 1
#define FIND 0
static const char version[] =
"Packet Generator for packet performance testing. Version: " VERSION "\n";
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_dev *pktgen_find_dev(struct pktgen_thread *t,
const char *ifname, bool exact);
static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
static void pktgen_run_all_threads(struct pktgen_net *pn);
static void pktgen_reset_all_threads(struct pktgen_net *pn);
static void pktgen_stop_all_threads(struct pktgen_net *pn);
static void pktgen_stop(struct pktgen_thread *t);
static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
static void fill_imix_distribution(struct pktgen_dev *pkt_dev);
static int pg_count_d __read_mostly = 1000;
static int pg_delay_d __read_mostly;
static int pg_clone_skb_d __read_mostly;
static int debug __read_mostly;
static DEFINE_MUTEX(pktgen_thread_lock);
static struct notifier_block pktgen_notifier_block = {
.notifier_call = pktgen_device_event,
};
static int pgctrl_show(struct seq_file *seq, void *v)
{
seq_puts(seq, version);
return 0;
}
static ssize_t pgctrl_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
char data[128];
size_t max;
struct pktgen_net *pn = net_generic(current->nsproxy->net_ns, pg_net_id);
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (count < 1)
return -EINVAL;
max = min(count, sizeof(data) - 1);
if (copy_from_user(data, buf, max))
return -EFAULT;
if (data[max - 1] == '\n')
data[max - 1] = 0;
else
data[max] = 0;
if (!strcmp(data, "stop"))
pktgen_stop_all_threads(pn);
else if (!strcmp(data, "start"))
pktgen_run_all_threads(pn);
else if (!strcmp(data, "reset"))
pktgen_reset_all_threads(pn);
else
return -EINVAL;
return count;
}
static int pgctrl_open(struct inode *inode, struct file *file)
{
return single_open(file, pgctrl_show, pde_data(inode));
}
static const struct proc_ops pktgen_proc_ops = {
.proc_open = pgctrl_open,
.proc_read = seq_read,
.proc_lseek = seq_lseek,
.proc_write = pgctrl_write,
.proc_release = single_release,
};
static int pktgen_if_show(struct seq_file *seq, void *v)
{
const struct pktgen_dev *pkt_dev = seq->private;
ktime_t stopped;
unsigned int i;
u64 idle;
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);
if (pkt_dev->n_imix_entries > 0) {
seq_puts(seq, " imix_weights: ");
for (i = 0; i < pkt_dev->n_imix_entries; i++) {
seq_printf(seq, "%llu,%llu ",
pkt_dev->imix_entries[i].size,
pkt_dev->imix_entries[i].weight);
}
seq_puts(seq, "\n");
}
seq_printf(seq,
" frags: %d delay: %llu clone_skb: %d ifname: %s\n",
pkt_dev->nfrags, (unsigned long long) pkt_dev->delay,
pkt_dev->clone_skb, pkt_dev->odevname);
seq_printf(seq, " flows: %u flowlen: %u\n", pkt_dev->cflows,
pkt_dev->lflow);
seq_printf(seq,
" queue_map_min: %u queue_map_max: %u\n",
pkt_dev->queue_map_min,
pkt_dev->queue_map_max);
if (pkt_dev->skb_priority)
seq_printf(seq, " skb_priority: %u\n",
pkt_dev->skb_priority);
if (pkt_dev->flags & F_IPV6) {
seq_printf(seq,
" saddr: %pI6c min_saddr: %pI6c max_saddr: %pI6c\n"
" daddr: %pI6c min_daddr: %pI6c max_daddr: %pI6c\n",
&pkt_dev->in6_saddr,
&pkt_dev->min_in6_saddr, &pkt_dev->max_in6_saddr,
&pkt_dev->in6_daddr,
&pkt_dev->min_in6_daddr, &pkt_dev->max_in6_daddr);
} else {
seq_printf(seq,
" dst_min: %s dst_max: %s\n",
pkt_dev->dst_min, pkt_dev->dst_max);
seq_printf(seq,
" src_min: %s src_max: %s\n",
pkt_dev->src_min, pkt_dev->src_max);
}
seq_puts(seq, " src_mac: ");
seq_printf(seq, "%pM ",
is_zero_ether_addr(pkt_dev->src_mac) ?
pkt_dev->odev->dev_addr : pkt_dev->src_mac);
seq_puts(seq, "dst_mac: ");
seq_printf(seq, "%pM\n", pkt_dev->dst_mac);
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);
seq_printf(seq,
" src_mac_count: %d dst_mac_count: %d\n",
pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
if (pkt_dev->nr_labels) {
seq_puts(seq, " mpls: ");
for (i = 0; i < pkt_dev->nr_labels; i++)
seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
i == pkt_dev->nr_labels-1 ? "\n" : ", ");
}
if (pkt_dev->vlan_id != 0xffff)
seq_printf(seq, " vlan_id: %u vlan_p: %u vlan_cfi: %u\n",
pkt_dev->vlan_id, pkt_dev->vlan_p,
pkt_dev->vlan_cfi);
if (pkt_dev->svlan_id != 0xffff)
seq_printf(seq, " svlan_id: %u vlan_p: %u vlan_cfi: %u\n",
pkt_dev->svlan_id, pkt_dev->svlan_p,
pkt_dev->svlan_cfi);
if (pkt_dev->tos)
seq_printf(seq, " tos: 0x%02x\n", pkt_dev->tos);
if (pkt_dev->traffic_class)
seq_printf(seq, " traffic_class: 0x%02x\n", pkt_dev->traffic_class);
if (pkt_dev->burst > 1)
seq_printf(seq, " burst: %d\n", pkt_dev->burst);
if (pkt_dev->node >= 0)
seq_printf(seq, " node: %d\n", pkt_dev->node);
if (pkt_dev->xmit_mode == M_NETIF_RECEIVE)
seq_puts(seq, " xmit_mode: netif_receive\n");
else if (pkt_dev->xmit_mode == M_QUEUE_XMIT)
seq_puts(seq, " xmit_mode: xmit_queue\n");
seq_puts(seq, " Flags: ");
for (i = 0; i < NR_PKT_FLAGS; i++) {
if (i == FLOW_SEQ_SHIFT)
if (!pkt_dev->cflows)
continue;
if (pkt_dev->flags & (1 << i)) {
seq_printf(seq, "%s ", pkt_flag_names[i]);
#ifdef CONFIG_XFRM
if (i == IPSEC_SHIFT && pkt_dev->spi)
seq_printf(seq, "spi:%u ", pkt_dev->spi);
#endif
} else if (i == FLOW_SEQ_SHIFT) {
seq_puts(seq, "FLOW_RND ");
}
}
seq_puts(seq, "\n");
stopped = pkt_dev->running ? ktime_get() : pkt_dev->stopped_at;
idle = pkt_dev->idle_acc;
do_div(idle, NSEC_PER_USEC);
seq_printf(seq,
"Current:\n pkts-sofar: %llu errors: %llu\n",
(unsigned long long)pkt_dev->sofar,
(unsigned long long)pkt_dev->errors);
if (pkt_dev->n_imix_entries > 0) {
int i;
seq_puts(seq, " imix_size_counts: ");
for (i = 0; i < pkt_dev->n_imix_entries; i++) {
seq_printf(seq, "%llu,%llu ",
pkt_dev->imix_entries[i].size,
pkt_dev->imix_entries[i].count_so_far);
}
seq_puts(seq, "\n");
}
seq_printf(seq,
" started: %lluus stopped: %lluus idle: %lluus\n",
(unsigned long long) ktime_to_us(pkt_dev->started_at),
(unsigned long long) ktime_to_us(stopped),
(unsigned long long) idle);
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) {
seq_printf(seq, " cur_saddr: %pI6c cur_daddr: %pI6c\n",
&pkt_dev->cur_in6_saddr,
&pkt_dev->cur_in6_daddr);
} else
seq_printf(seq, " cur_saddr: %pI4 cur_daddr: %pI4\n",
&pkt_dev->cur_saddr, &pkt_dev->cur_daddr);
seq_printf(seq, " cur_udp_dst: %d cur_udp_src: %d\n",
pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
seq_printf(seq, " cur_queue_map: %u\n", pkt_dev->cur_queue_map);
seq_printf(seq, " flows: %u\n", pkt_dev->nflows);
if (pkt_dev->result[0])
seq_printf(seq, "Result: %s\n", pkt_dev->result);
else
seq_puts(seq, "Result: Idle\n");
return 0;
}
static ssize_t hex32_arg(const char __user *user_buffer, size_t maxlen,
__u32 *num)
{
size_t i = 0;
*num = 0;
for (; i < maxlen; i++) {
int value;
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
value = hex_to_bin(c);
if (value >= 0) {
*num <<= 4;
*num |= value;
} else {
break;
}
}
return i;
}
static ssize_t count_trail_chars(const char __user *user_buffer, size_t maxlen)
{
size_t i;
for (i = 0; i < maxlen; i++) {
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
switch (c) {
case '\"':
case '\n':
case '\r':
case '\t':
case ' ':
case '=':
break;
default:
goto done;
}
}
done:
return i;
}
static ssize_t num_arg(const char __user *user_buffer, size_t maxlen,
unsigned long *num)
{
size_t i;
*num = 0;
for (i = 0; i < maxlen; i++) {
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
if ((c >= '0') && (c <= '9')) {
*num *= 10;
*num += c - '0';
} else
break;
}
return i;
}
static ssize_t strn_len(const char __user *user_buffer, size_t maxlen)
{
size_t i;
for (i = 0; i < maxlen; i++) {
char c;
if (get_user(c, &user_buffer[i]))
return -EFAULT;
switch (c) {
case '\"':
case '\n':
case '\r':
case '\t':
case ' ':
case '=':
goto done_str;
default:
break;
}
}
done_str:
return i;
}
static ssize_t get_imix_entries(const char __user *buffer,
size_t maxlen,
struct pktgen_dev *pkt_dev)
{
size_t i = 0, max;
ssize_t len;
char c;
pkt_dev->n_imix_entries = 0;
do {
unsigned long weight;
unsigned long size;
if (pkt_dev->n_imix_entries >= MAX_IMIX_ENTRIES)
return -E2BIG;
if (i >= maxlen)
return -EINVAL;
max = min(10, maxlen - i);
len = num_arg(&buffer[i], max, &size);
if (len < 0)
return len;
i += len;
if (i >= maxlen)
return -EINVAL;
if (get_user(c, &buffer[i]))
return -EFAULT;
if (c != ',')
return -EINVAL;
i++;
if (i >= maxlen)
return -EINVAL;
if (size < 14 + 20 + 8)
size = 14 + 20 + 8;
max = min(10, maxlen - i);
len = num_arg(&buffer[i], max, &weight);
if (len < 0)
return len;
if (weight <= 0)
return -EINVAL;
pkt_dev->imix_entries[pkt_dev->n_imix_entries].size = size;
pkt_dev->imix_entries[pkt_dev->n_imix_entries].weight = weight;
i += len;
pkt_dev->n_imix_entries++;
if (i >= maxlen)
break;
if (get_user(c, &buffer[i]))
return -EFAULT;
i++;
} while (c == ' ');
return i;
}
static ssize_t get_labels(const char __user *buffer,
size_t maxlen, struct pktgen_dev *pkt_dev)
{
unsigned int n = 0;
size_t i = 0, max;
ssize_t len;
char c;
pkt_dev->nr_labels = 0;
do {
__u32 tmp;
if (n >= MAX_MPLS_LABELS)
return -E2BIG;
if (i >= maxlen)
return -EINVAL;
max = min(8, maxlen - i);
len = hex32_arg(&buffer[i], max, &tmp);
if (len < 0)
return len;
if (len == 0 || tmp == 0)
return maxlen;
pkt_dev->labels[n] = htonl(tmp);
if (pkt_dev->labels[n] & MPLS_STACK_BOTTOM)
pkt_dev->flags |= F_MPLS_RND;
i += len;
n++;
if (i >= maxlen)
break;
if (get_user(c, &buffer[i]))
return -EFAULT;
i++;
} while (c == ',');
pkt_dev->nr_labels = n;
return i;
}
static __u32 pktgen_read_flag(const char *f, bool *disable)
{
__u32 i;
if (f[0] == '!') {
*disable = true;
f++;
}
for (i = 0; i < NR_PKT_FLAGS; i++) {
if (!IS_ENABLED(CONFIG_XFRM) && i == IPSEC_SHIFT)
continue;
if (!*disable && i == IPV6_SHIFT)
continue;
if (strcmp(f, pkt_flag_names[i]) == 0)
return 1 << i;
}
if (strcmp(f, "FLOW_RND") == 0) {
*disable = !*disable;
return F_FLOW_SEQ;
}
return 0;
}
static ssize_t pktgen_if_write(struct file *file,
const char __user *user_buffer, size_t count,
loff_t *offset)
{
struct seq_file *seq = file->private_data;
struct pktgen_dev *pkt_dev = seq->private;
size_t i, max;
ssize_t len;
char name[16], valstr[32];
unsigned long value = 0;
char *pg_result = NULL;
char buf[128];
pg_result = &(pkt_dev->result[0]);
if (count < 1) {
pr_warn("wrong command format\n");
return -EINVAL;
}
max = count;
len = count_trail_chars(user_buffer, max);
if (len < 0) {
pr_warn("illegal format\n");
return len;
}
i = len;
max = min(sizeof(name) - 1, count - i);
len = strn_len(&user_buffer[i], max);
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;
i += len;
if (debug) {
size_t copy = min_t(size_t, count + 1, 1024);
char *tp = strndup_user(user_buffer, copy);
if (IS_ERR(tp))
return PTR_ERR(tp);
pr_debug("%s,%zu buffer -:%s:-\n", name, count, tp);
kfree(tp);
}
if (!strcmp(name, "min_pkt_size")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value < 14 + 20 + 8)
value = 14 + 20 + 8;
if (value != pkt_dev->min_pkt_size) {
pkt_dev->min_pkt_size = value;
pkt_dev->cur_pkt_size = value;
}
sprintf(pg_result, "OK: min_pkt_size=%d",
pkt_dev->min_pkt_size);
return count;
}
if (!strcmp(name, "max_pkt_size")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value < 14 + 20 + 8)
value = 14 + 20 + 8;
if (value != pkt_dev->max_pkt_size) {
pkt_dev->max_pkt_size = value;
pkt_dev->cur_pkt_size = value;
}
sprintf(pg_result, "OK: max_pkt_size=%d",
pkt_dev->max_pkt_size);
return count;
}
if (!strcmp(name, "pkt_size")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value < 14 + 20 + 8)
value = 14 + 20 + 8;
if (value != pkt_dev->min_pkt_size) {
pkt_dev->min_pkt_size = value;
pkt_dev->max_pkt_size = value;
pkt_dev->cur_pkt_size = value;
}
sprintf(pg_result, "OK: pkt_size=%d", pkt_dev->min_pkt_size);
return count;
}
if (!strcmp(name, "imix_weights")) {
if (pkt_dev->clone_skb > 0)
return -EINVAL;
max = count - i;
len = get_imix_entries(&user_buffer[i], max, pkt_dev);
if (len < 0)
return len;
fill_imix_distribution(pkt_dev);
return count;
}
if (!strcmp(name, "debug")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
debug = value;
sprintf(pg_result, "OK: debug=%u", debug);
return count;
}
if (!strcmp(name, "frags")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
pkt_dev->nfrags = value;
sprintf(pg_result, "OK: frags=%d", pkt_dev->nfrags);
return count;
}
if (!strcmp(name, "delay")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value == 0x7FFFFFFF)
pkt_dev->delay = ULLONG_MAX;
else
pkt_dev->delay = (u64)value;
sprintf(pg_result, "OK: delay=%llu",
(unsigned long long) pkt_dev->delay);
return count;
}
if (!strcmp(name, "rate")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (!value)
return -EINVAL;
pkt_dev->delay = pkt_dev->min_pkt_size*8*NSEC_PER_USEC/value;
if (debug)
pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
sprintf(pg_result, "OK: rate=%lu", value);
return count;
}
if (!strcmp(name, "ratep")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (!value)
return -EINVAL;
pkt_dev->delay = NSEC_PER_SEC/value;
if (debug)
pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
sprintf(pg_result, "OK: rate=%lu", value);
return count;
}
if (!strcmp(name, "udp_src_min")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value != pkt_dev->udp_src_min) {
pkt_dev->udp_src_min = value;
pkt_dev->cur_udp_src = value;
}
sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
return count;
}
if (!strcmp(name, "udp_dst_min")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value != pkt_dev->udp_dst_min) {
pkt_dev->udp_dst_min = value;
pkt_dev->cur_udp_dst = value;
}
sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
return count;
}
if (!strcmp(name, "udp_src_max")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value != pkt_dev->udp_src_max) {
pkt_dev->udp_src_max = value;
pkt_dev->cur_udp_src = value;
}
sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
return count;
}
if (!strcmp(name, "udp_dst_max")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value != pkt_dev->udp_dst_max) {
pkt_dev->udp_dst_max = value;
pkt_dev->cur_udp_dst = value;
}
sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
return count;
}
if (!strcmp(name, "clone_skb")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if ((value > 0) &&
((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
return -EOPNOTSUPP;
if (value > 0 && (pkt_dev->n_imix_entries > 0 ||
!(pkt_dev->flags & F_SHARED)))
return -EINVAL;
pkt_dev->clone_skb = value;
sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
return count;
}
if (!strcmp(name, "count")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
pkt_dev->count = value;
sprintf(pg_result, "OK: count=%llu",
(unsigned long long)pkt_dev->count);
return count;
}
if (!strcmp(name, "src_mac_count")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (pkt_dev->src_mac_count != value) {
pkt_dev->src_mac_count = value;
pkt_dev->cur_src_mac_offset = 0;
}
sprintf(pg_result, "OK: src_mac_count=%d",
pkt_dev->src_mac_count);
return count;
}
if (!strcmp(name, "dst_mac_count")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (pkt_dev->dst_mac_count != value) {
pkt_dev->dst_mac_count = value;
pkt_dev->cur_dst_mac_offset = 0;
}
sprintf(pg_result, "OK: dst_mac_count=%d",
pkt_dev->dst_mac_count);
return count;
}
if (!strcmp(name, "burst")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if ((value > 1) &&
((pkt_dev->xmit_mode == M_QUEUE_XMIT) ||
((pkt_dev->xmit_mode == M_START_XMIT) &&
(!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))))
return -EOPNOTSUPP;
if (value > 1 && !(pkt_dev->flags & F_SHARED))
return -EINVAL;
pkt_dev->burst = value < 1 ? 1 : value;
sprintf(pg_result, "OK: burst=%u", pkt_dev->burst);
return count;
}
if (!strcmp(name, "node")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (node_possible(value)) {
pkt_dev->node = value;
sprintf(pg_result, "OK: node=%d", pkt_dev->node);
if (pkt_dev->page) {
put_page(pkt_dev->page);
pkt_dev->page = NULL;
}
} else {
sprintf(pg_result, "ERROR: node not possible");
}
return count;
}
if (!strcmp(name, "xmit_mode")) {
char f[32];
max = min(sizeof(f) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
memset(f, 0, sizeof(f));
if (copy_from_user(f, &user_buffer[i], len))
return -EFAULT;
if (strcmp(f, "start_xmit") == 0) {
pkt_dev->xmit_mode = M_START_XMIT;
} else if (strcmp(f, "netif_receive") == 0) {
if (pkt_dev->clone_skb > 0)
return -EOPNOTSUPP;
pkt_dev->xmit_mode = M_NETIF_RECEIVE;
pkt_dev->last_ok = 1;
} else if (strcmp(f, "queue_xmit") == 0) {
pkt_dev->xmit_mode = M_QUEUE_XMIT;
pkt_dev->last_ok = 1;
} else {
sprintf(pg_result,
"xmit_mode -:%s:- unknown\nAvailable modes: %s",
f, "start_xmit, netif_receive\n");
return count;
}
sprintf(pg_result, "OK: xmit_mode=%s", f);
return count;
}
if (!strcmp(name, "flag")) {
bool disable = false;
__u32 flag;
char f[32];
char *end;
max = min(sizeof(f) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
memset(f, 0, 32);
if (copy_from_user(f, &user_buffer[i], len))
return -EFAULT;
flag = pktgen_read_flag(f, &disable);
if (flag) {
if (disable) {
if (flag == F_SHARED && (pkt_dev->clone_skb ||
pkt_dev->burst > 1))
return -EINVAL;
pkt_dev->flags &= ~flag;
} else {
pkt_dev->flags |= flag;
}
sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
return count;
}
end = pkt_dev->result + sizeof(pkt_dev->result);
pg_result += sprintf(pg_result,
"Flag -:%s:- unknown\n"
"Available flags, (prepend ! to un-set flag):\n", f);
for (int n = 0; n < NR_PKT_FLAGS && pg_result < end; n++) {
if (!IS_ENABLED(CONFIG_XFRM) && n == IPSEC_SHIFT)
continue;
pg_result += snprintf(pg_result, end - pg_result,
"%s, ", pkt_flag_names[n]);
}
if (!WARN_ON_ONCE(pg_result >= end)) {
*(pg_result - 2) = '\0';
}
return count;
}
if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
max = min(sizeof(pkt_dev->dst_min) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
if (copy_from_user(buf, &user_buffer[i], len))
return -EFAULT;
buf[len] = 0;
if (strcmp(buf, pkt_dev->dst_min) != 0) {
strscpy_pad(pkt_dev->dst_min, buf);
pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
pkt_dev->cur_daddr = pkt_dev->daddr_min;
}
if (debug)
pr_debug("dst_min set to: %s\n", pkt_dev->dst_min);
sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
return count;
}
if (!strcmp(name, "dst_max")) {
max = min(sizeof(pkt_dev->dst_max) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
if (copy_from_user(buf, &user_buffer[i], len))
return -EFAULT;
buf[len] = 0;
if (strcmp(buf, pkt_dev->dst_max) != 0) {
strscpy_pad(pkt_dev->dst_max, buf);
pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
pkt_dev->cur_daddr = pkt_dev->daddr_max;
}
if (debug)
pr_debug("dst_max set to: %s\n", pkt_dev->dst_max);
sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
return count;
}
if (!strcmp(name, "dst6")) {
max = min(sizeof(buf) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
pkt_dev->flags |= F_IPV6;
if (copy_from_user(buf, &user_buffer[i], len))
return -EFAULT;
buf[len] = 0;
in6_pton(buf, -1, pkt_dev->in6_daddr.s6_addr, -1, NULL);
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_daddr);
pkt_dev->cur_in6_daddr = pkt_dev->in6_daddr;
if (debug)
pr_debug("dst6 set to: %s\n", buf);
sprintf(pg_result, "OK: dst6=%s", buf);
return count;
}
if (!strcmp(name, "dst6_min")) {
max = min(sizeof(buf) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
pkt_dev->flags |= F_IPV6;
if (copy_from_user(buf, &user_buffer[i], len))
return -EFAULT;
buf[len] = 0;
in6_pton(buf, -1, pkt_dev->min_in6_daddr.s6_addr, -1, NULL);
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->min_in6_daddr);
pkt_dev->cur_in6_daddr = pkt_dev->min_in6_daddr;
if (debug)
pr_debug("dst6_min set to: %s\n", buf);
sprintf(pg_result, "OK: dst6_min=%s", buf);
return count;
}
if (!strcmp(name, "dst6_max")) {
max = min(sizeof(buf) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
pkt_dev->flags |= F_IPV6;
if (copy_from_user(buf, &user_buffer[i], len))
return -EFAULT;
buf[len] = 0;
in6_pton(buf, -1, pkt_dev->max_in6_daddr.s6_addr, -1, NULL);
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->max_in6_daddr);
if (debug)
pr_debug("dst6_max set to: %s\n", buf);
sprintf(pg_result, "OK: dst6_max=%s", buf);
return count;
}
if (!strcmp(name, "src6")) {
max = min(sizeof(buf) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
pkt_dev->flags |= F_IPV6;
if (copy_from_user(buf, &user_buffer[i], len))
return -EFAULT;
buf[len] = 0;
in6_pton(buf, -1, pkt_dev->in6_saddr.s6_addr, -1, NULL);
snprintf(buf, sizeof(buf), "%pI6c", &pkt_dev->in6_saddr);
pkt_dev->cur_in6_saddr = pkt_dev->in6_saddr;
if (debug)
pr_debug("src6 set to: %s\n", buf);
sprintf(pg_result, "OK: src6=%s", buf);
return count;
}
if (!strcmp(name, "src_min")) {
max = min(sizeof(pkt_dev->src_min) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
if (copy_from_user(buf, &user_buffer[i], len))
return -EFAULT;
buf[len] = 0;
if (strcmp(buf, pkt_dev->src_min) != 0) {
strscpy_pad(pkt_dev->src_min, buf);
pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
pkt_dev->cur_saddr = pkt_dev->saddr_min;
}
if (debug)
pr_debug("src_min set to: %s\n", pkt_dev->src_min);
sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
return count;
}
if (!strcmp(name, "src_max")) {
max = min(sizeof(pkt_dev->src_max) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
if (copy_from_user(buf, &user_buffer[i], len))
return -EFAULT;
buf[len] = 0;
if (strcmp(buf, pkt_dev->src_max) != 0) {
strscpy_pad(pkt_dev->src_max, buf);
pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
pkt_dev->cur_saddr = pkt_dev->saddr_max;
}
if (debug)
pr_debug("src_max set to: %s\n", pkt_dev->src_max);
sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
return count;
}
if (!strcmp(name, "dst_mac")) {
max = min(sizeof(valstr) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
memset(valstr, 0, sizeof(valstr));
if (copy_from_user(valstr, &user_buffer[i], len))
return -EFAULT;
if (!mac_pton(valstr, pkt_dev->dst_mac))
return -EINVAL;
ether_addr_copy(&pkt_dev->hh[0], pkt_dev->dst_mac);
sprintf(pg_result, "OK: dstmac %pM", pkt_dev->dst_mac);
return count;
}
if (!strcmp(name, "src_mac")) {
max = min(sizeof(valstr) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
memset(valstr, 0, sizeof(valstr));
if (copy_from_user(valstr, &user_buffer[i], len))
return -EFAULT;
if (!mac_pton(valstr, pkt_dev->src_mac))
return -EINVAL;
ether_addr_copy(&pkt_dev->hh[6], pkt_dev->src_mac);
sprintf(pg_result, "OK: srcmac %pM", pkt_dev->src_mac);
return count;
}
if (!strcmp(name, "clear_counters")) {
pktgen_clear_counters(pkt_dev);
sprintf(pg_result, "OK: Clearing counters.\n");
return count;
}
if (!strcmp(name, "flows")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value > MAX_CFLOWS)
value = MAX_CFLOWS;
pkt_dev->cflows = value;
sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
return count;
}
#ifdef CONFIG_XFRM
if (!strcmp(name, "spi")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
pkt_dev->spi = value;
sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
return count;
}
#endif
if (!strcmp(name, "flowlen")) {
max = min(10, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
pkt_dev->lflow = value;
sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
return count;
}
if (!strcmp(name, "queue_map_min")) {
max = min(5, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
pkt_dev->queue_map_min = value;
sprintf(pg_result, "OK: queue_map_min=%u", pkt_dev->queue_map_min);
return count;
}
if (!strcmp(name, "queue_map_max")) {
max = min(5, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
pkt_dev->queue_map_max = value;
sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
return count;
}
if (!strcmp(name, "mpls")) {
unsigned int n, cnt;
max = count - i;
len = get_labels(&user_buffer[i], max, pkt_dev);
if (len < 0)
return len;
cnt = sprintf(pg_result, "OK: mpls=");
for (n = 0; n < pkt_dev->nr_labels; n++)
cnt += sprintf(pg_result + cnt,
"%08x%s", ntohl(pkt_dev->labels[n]),
n == pkt_dev->nr_labels-1 ? "" : ",");
if (pkt_dev->nr_labels && pkt_dev->vlan_id != 0xffff) {
pkt_dev->vlan_id = 0xffff;
pkt_dev->svlan_id = 0xffff;
if (debug)
pr_debug("VLAN/SVLAN auto turned off\n");
}
return count;
}
if (!strcmp(name, "vlan_id")) {
max = min(4, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if (value <= 4095) {
pkt_dev->vlan_id = value;
if (debug)
pr_debug("VLAN turned on\n");
if (debug && pkt_dev->nr_labels)
pr_debug("MPLS auto turned off\n");
pkt_dev->nr_labels = 0;
sprintf(pg_result, "OK: vlan_id=%u", pkt_dev->vlan_id);
} else {
pkt_dev->vlan_id = 0xffff;
pkt_dev->svlan_id = 0xffff;
if (debug)
pr_debug("VLAN/SVLAN turned off\n");
}
return count;
}
if (!strcmp(name, "vlan_p")) {
max = min(1, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if ((value <= 7) && (pkt_dev->vlan_id != 0xffff)) {
pkt_dev->vlan_p = value;
sprintf(pg_result, "OK: vlan_p=%u", pkt_dev->vlan_p);
} else {
sprintf(pg_result, "ERROR: vlan_p must be 0-7");
}
return count;
}
if (!strcmp(name, "vlan_cfi")) {
max = min(1, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if ((value <= 1) && (pkt_dev->vlan_id != 0xffff)) {
pkt_dev->vlan_cfi = value;
sprintf(pg_result, "OK: vlan_cfi=%u", pkt_dev->vlan_cfi);
} else {
sprintf(pg_result, "ERROR: vlan_cfi must be 0-1");
}
return count;
}
if (!strcmp(name, "svlan_id")) {
max = min(4, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
pkt_dev->svlan_id = value;
if (debug)
pr_debug("SVLAN turned on\n");
if (debug && pkt_dev->nr_labels)
pr_debug("MPLS auto turned off\n");
pkt_dev->nr_labels = 0;
sprintf(pg_result, "OK: svlan_id=%u", pkt_dev->svlan_id);
} else {
pkt_dev->vlan_id = 0xffff;
pkt_dev->svlan_id = 0xffff;
if (debug)
pr_debug("VLAN/SVLAN turned off\n");
}
return count;
}
if (!strcmp(name, "svlan_p")) {
max = min(1, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if ((value <= 7) && (pkt_dev->svlan_id != 0xffff)) {
pkt_dev->svlan_p = value;
sprintf(pg_result, "OK: svlan_p=%u", pkt_dev->svlan_p);
} else {
sprintf(pg_result, "ERROR: svlan_p must be 0-7");
}
return count;
}
if (!strcmp(name, "svlan_cfi")) {
max = min(1, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
if ((value <= 1) && (pkt_dev->svlan_id != 0xffff)) {
pkt_dev->svlan_cfi = value;
sprintf(pg_result, "OK: svlan_cfi=%u", pkt_dev->svlan_cfi);
} else {
sprintf(pg_result, "ERROR: svlan_cfi must be 0-1");
}
return count;
}
if (!strcmp(name, "tos")) {
__u32 tmp_value;
max = min(2, count - i);
len = hex32_arg(&user_buffer[i], max, &tmp_value);
if (len < 0)
return len;
if (len == 2) {
pkt_dev->tos = tmp_value;
sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
} else {
sprintf(pg_result, "ERROR: tos must be 00-ff");
}
return count;
}
if (!strcmp(name, "traffic_class")) {
__u32 tmp_value;
max = min(2, count - i);
len = hex32_arg(&user_buffer[i], max, &tmp_value);
if (len < 0)
return len;
if (len == 2) {
pkt_dev->traffic_class = tmp_value;
sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
} else {
sprintf(pg_result, "ERROR: traffic_class must be 00-ff");
}
return count;
}
if (!strcmp(name, "skb_priority")) {
max = min(9, count - i);
len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
pkt_dev->skb_priority = value;
sprintf(pg_result, "OK: skb_priority=%i",
pkt_dev->skb_priority);
return count;
}
sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
return -EINVAL;
}
static int pktgen_if_open(struct inode *inode, struct file *file)
{
return single_open(file, pktgen_if_show, pde_data(inode));
}
static const struct proc_ops pktgen_if_proc_ops = {
.proc_open = pktgen_if_open,
.proc_read = seq_read,
.proc_lseek = seq_lseek,
.proc_write = pktgen_if_write,
.proc_release = single_release,
};
static int pktgen_thread_show(struct seq_file *seq, void *v)
{
struct pktgen_thread *t = seq->private;
const struct pktgen_dev *pkt_dev;
BUG_ON(!t);
seq_puts(seq, "Running: ");
rcu_read_lock();
list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
if (pkt_dev->running)
seq_printf(seq, "%s ", pkt_dev->odevname);
seq_puts(seq, "\nStopped: ");
list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
if (!pkt_dev->running)
seq_printf(seq, "%s ", pkt_dev->odevname);
if (t->result[0])
seq_printf(seq, "\nResult: %s\n", t->result);
else
seq_puts(seq, "\nResult: NA\n");
rcu_read_unlock();
return 0;
}
static ssize_t pktgen_thread_write(struct file *file,
const char __user *user_buffer,
size_t count, loff_t *offset)
{
struct seq_file *seq = file->private_data;
struct pktgen_thread *t = seq->private;
size_t i, max;
ssize_t len, ret;
char name[40];
char *pg_result;
if (count < 1) {
return -EINVAL;
}
max = count;
len = count_trail_chars(user_buffer, max);
if (len < 0)
return len;
i = len;
max = min(sizeof(name) - 1, count - i);
len = strn_len(&user_buffer[i], max);
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;
i += len;
if (debug)
pr_debug("t=%s, count=%lu\n", name, (unsigned long)count);
if (!t) {
pr_err("ERROR: No thread\n");
ret = -EINVAL;
goto out;
}
pg_result = &(t->result[0]);
if (!strcmp(name, "add_device")) {
char f[32];
memset(f, 0, 32);
max = min(sizeof(f) - 1, count - i);
len = strn_len(&user_buffer[i], max);
if (len < 0) {
ret = len;
goto out;
}
if (copy_from_user(f, &user_buffer[i], len))
return -EFAULT;
mutex_lock(&pktgen_thread_lock);
ret = pktgen_add_device(t, f);
mutex_unlock(&pktgen_thread_lock);
if (!ret) {
ret = count;
sprintf(pg_result, "OK: add_device=%s", f);
} else
sprintf(pg_result, "ERROR: can not add device %s", f);
goto out;
}
if (!strcmp(name, "rem_device_all")) {
mutex_lock(&pktgen_thread_lock);
t->control |= T_REMDEVALL;
mutex_unlock(&pktgen_thread_lock);
schedule_timeout_interruptible(msecs_to_jiffies(125));
ret = count;
sprintf(pg_result, "OK: rem_device_all");
goto out;
}
if (!strcmp(name, "max_before_softirq")) {
sprintf(pg_result, "OK: Note! max_before_softirq is obsoleted -- Do not use");
ret = count;
goto out;
}
ret = -EINVAL;
out:
return ret;
}
static int pktgen_thread_open(struct inode *inode, struct file *file)
{
return single_open(file, pktgen_thread_show, pde_data(inode));
}
static const struct proc_ops pktgen_thread_proc_ops = {
.proc_open = pktgen_thread_open,
.proc_read = seq_read,
.proc_lseek = seq_lseek,
.proc_write = pktgen_thread_write,
.proc_release = single_release,
};
static struct pktgen_dev *__pktgen_NN_threads(const struct pktgen_net *pn,
const char *ifname, int remove)
{
struct pktgen_thread *t;
struct pktgen_dev *pkt_dev = NULL;
bool exact = (remove == FIND);
list_for_each_entry(t, &pn->pktgen_threads, th_list) {
pkt_dev = pktgen_find_dev(t, ifname, exact);
if (pkt_dev) {
if (remove) {
pkt_dev->removal_mark = 1;
t->control |= T_REMDEV;
}
break;
}
}
return pkt_dev;
}
static void pktgen_mark_device(const struct pktgen_net *pn, const char *ifname)
{
struct pktgen_dev *pkt_dev = NULL;
const int max_tries = 10, msec_per_try = 125;
int i = 0;
mutex_lock(&pktgen_thread_lock);
pr_debug("%s: marking %s for removal\n", __func__, ifname);
while (1) {
pkt_dev = __pktgen_NN_threads(pn, ifname, REMOVE);
if (pkt_dev == NULL)
break;
mutex_unlock(&pktgen_thread_lock);
pr_debug("%s: waiting for %s to disappear....\n",
__func__, ifname);
schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try));
mutex_lock(&pktgen_thread_lock);
if (++i >= max_tries) {
pr_err("%s: timed out after waiting %d msec for device %s to be removed\n",
__func__, msec_per_try * i, ifname);
break;
}
}
mutex_unlock(&pktgen_thread_lock);
}
static void pktgen_change_name(const struct pktgen_net *pn, struct net_device *dev)
{
struct pktgen_thread *t;
mutex_lock(&pktgen_thread_lock);
list_for_each_entry(t, &pn->pktgen_threads, th_list) {
struct pktgen_dev *pkt_dev;
if_lock(t);
list_for_each_entry(pkt_dev, &t->if_list, list) {
if (pkt_dev->odev != dev)
continue;
proc_remove(pkt_dev->entry);
pkt_dev->entry = proc_create_data(dev->name, 0600,
pn->proc_dir,
&pktgen_if_proc_ops,
pkt_dev);
if (!pkt_dev->entry)
pr_err("can't move proc entry for '%s'\n",
dev->name);
break;
}
if_unlock(t);
}
mutex_unlock(&pktgen_thread_lock);
}
static int pktgen_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct pktgen_net *pn = net_generic(dev_net(dev), pg_net_id);
if (pn->pktgen_exiting)
return NOTIFY_DONE;
switch (event) {
case NETDEV_CHANGENAME:
pktgen_change_name(pn, dev);
break;
case NETDEV_UNREGISTER:
pktgen_mark_device(pn, dev->name);
break;
}
return NOTIFY_DONE;
}
static struct net_device *pktgen_dev_get_by_name(const struct pktgen_net *pn,
struct pktgen_dev *pkt_dev,
const char *ifname)
{
char b[IFNAMSIZ+5];
int i;
for (i = 0; ifname[i] != '@'; i++) {
if (i == IFNAMSIZ)
break;
b[i] = ifname[i];
}
b[i] = 0;
return dev_get_by_name(pn->net, b);
}
static int pktgen_setup_dev(const struct pktgen_net *pn,
struct pktgen_dev *pkt_dev, const char *ifname)
{
struct net_device *odev;
int err;
if (pkt_dev->odev) {
netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker);
pkt_dev->odev = NULL;
}
odev = pktgen_dev_get_by_name(pn, pkt_dev, ifname);
if (!odev) {
pr_err("no such netdevice: \"%s\"\n", ifname);
return -ENODEV;
}
if (odev->type != ARPHRD_ETHER && odev->type != ARPHRD_LOOPBACK) {
pr_err("not an ethernet or loopback device: \"%s\"\n", ifname);
err = -EINVAL;
} else if (!netif_running(odev)) {
pr_err("device is down: \"%s\"\n", ifname);
err = -ENETDOWN;
} else {
pkt_dev->odev = odev;
netdev_tracker_alloc(odev, &pkt_dev->dev_tracker, GFP_KERNEL);
return 0;
}
dev_put(odev);
return err;
}
static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
{
int ntxq;
if (!pkt_dev->odev) {
pr_err("ERROR: pkt_dev->odev == NULL in setup_inject\n");
sprintf(pkt_dev->result,
"ERROR: pkt_dev->odev == NULL in setup_inject.\n");
return;
}
ntxq = pkt_dev->odev->real_num_tx_queues;
if (ntxq <= pkt_dev->queue_map_min) {
pr_warn("WARNING: Requested queue_map_min (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
pkt_dev->queue_map_min, (ntxq ?: 1) - 1, ntxq,
pkt_dev->odevname);
pkt_dev->queue_map_min = (ntxq ?: 1) - 1;
}
if (pkt_dev->queue_map_max >= ntxq) {
pr_warn("WARNING: Requested queue_map_max (zero-based) (%d) exceeds valid range [0 - %d] for (%d) queues on %s, resetting\n",
pkt_dev->queue_map_max, (ntxq ?: 1) - 1, ntxq,
pkt_dev->odevname);
pkt_dev->queue_map_max = (ntxq ?: 1) - 1;
}
if (is_zero_ether_addr(pkt_dev->src_mac))
ether_addr_copy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr);
ether_addr_copy(&(pkt_dev->hh[0]), pkt_dev->dst_mac);
if (pkt_dev->flags & F_IPV6) {
int i, set = 0, err = 1;
struct inet6_dev *idev;
if (pkt_dev->min_pkt_size == 0) {
pkt_dev->min_pkt_size = 14 + sizeof(struct ipv6hdr)
+ sizeof(struct udphdr)
+ sizeof(struct pktgen_hdr)
+ pkt_dev->pkt_overhead;
}
for (i = 0; i < sizeof(struct in6_addr); i++)
if (pkt_dev->cur_in6_saddr.s6_addr[i]) {
set = 1;
break;
}
if (!set) {
rcu_read_lock();
idev = __in6_dev_get(pkt_dev->odev);
if (idev) {
struct inet6_ifaddr *ifp;
read_lock_bh(&idev->lock);
list_for_each_entry(ifp, &idev->addr_list, if_list) {
if ((ifp->scope & IFA_LINK) &&
!(ifp->flags & IFA_F_TENTATIVE)) {
pkt_dev->cur_in6_saddr = ifp->addr;
err = 0;
break;
}
}
read_unlock_bh(&idev->lock);
}
rcu_read_unlock();
if (err)
pr_err("ERROR: IPv6 link address not available\n");
}
} else {
if (pkt_dev->min_pkt_size == 0) {
pkt_dev->min_pkt_size = 14 + sizeof(struct iphdr)
+ sizeof(struct udphdr)
+ sizeof(struct pktgen_hdr)
+ pkt_dev->pkt_overhead;
}
pkt_dev->saddr_min = 0;
pkt_dev->saddr_max = 0;
if (strlen(pkt_dev->src_min) == 0) {
struct in_device *in_dev;
rcu_read_lock();
in_dev = __in_dev_get_rcu(pkt_dev->odev);
if (in_dev) {
const struct in_ifaddr *ifa;
ifa = rcu_dereference(in_dev->ifa_list);
if (ifa) {
pkt_dev->saddr_min = ifa->ifa_address;
pkt_dev->saddr_max = pkt_dev->saddr_min;
}
}
rcu_read_unlock();
} else {
pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
}
pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
}
pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
if (pkt_dev->min_pkt_size > pkt_dev->max_pkt_size)
pkt_dev->max_pkt_size = pkt_dev->min_pkt_size;
pkt_dev->cur_dst_mac_offset = 0;
pkt_dev->cur_src_mac_offset = 0;
pkt_dev->cur_saddr = pkt_dev->saddr_min;
pkt_dev->cur_daddr = pkt_dev->daddr_min;
pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
pkt_dev->nflows = 0;
}
static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
{
ktime_t start_time, end_time;
s64 remaining;
struct hrtimer_sleeper t;
hrtimer_setup_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
hrtimer_set_expires(&t.timer, spin_until);
remaining = ktime_to_ns(hrtimer_expires_remaining(&t.timer));
if (remaining <= 0)
goto out;
start_time = ktime_get();
if (remaining < 100000) {
do {
end_time = ktime_get();
} while (ktime_compare(end_time, spin_until) < 0);
} else {
do {
set_current_state(TASK_INTERRUPTIBLE);
hrtimer_sleeper_start_expires(&t, HRTIMER_MODE_ABS);
if (likely(t.task))
schedule();
hrtimer_cancel(&t.timer);
} while (t.task && pkt_dev->running && !signal_pending(current));
__set_current_state(TASK_RUNNING);
end_time = ktime_get();
}
pkt_dev->idle_acc += ktime_to_ns(ktime_sub(end_time, start_time));
out:
pkt_dev->next_tx = ktime_add_ns(spin_until, pkt_dev->delay);
destroy_hrtimer_on_stack(&t.timer);
}
static inline void set_pkt_overhead(struct pktgen_dev *pkt_dev)
{
pkt_dev->pkt_overhead = 0;
pkt_dev->pkt_overhead += pkt_dev->nr_labels*sizeof(u32);
pkt_dev->pkt_overhead += VLAN_TAG_SIZE(pkt_dev);
pkt_dev->pkt_overhead += SVLAN_TAG_SIZE(pkt_dev);
}
static inline int f_seen(const struct pktgen_dev *pkt_dev, int flow)
{
return !!(pkt_dev->flows[flow].flags & F_INIT);
}
static inline int f_pick(struct pktgen_dev *pkt_dev)
{
int flow = pkt_dev->curfl;
if (pkt_dev->flags & F_FLOW_SEQ) {
if (pkt_dev->flows[flow].count >= pkt_dev->lflow) {
pkt_dev->flows[flow].count = 0;
pkt_dev->flows[flow].flags = 0;
pkt_dev->curfl += 1;
if (pkt_dev->curfl >= pkt_dev->cflows)
pkt_dev->curfl = 0;
}
} else {
flow = get_random_u32_below(pkt_dev->cflows);
pkt_dev->curfl = flow;
if (pkt_dev->flows[flow].count > pkt_dev->lflow) {
pkt_dev->flows[flow].count = 0;
pkt_dev->flows[flow].flags = 0;
}
}
return pkt_dev->curfl;
}
#define DUMMY_MARK 0
static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
{
#ifdef CONFIG_XFRM
struct xfrm_state *x = pkt_dev->flows[flow].x;
struct pktgen_net *pn = net_generic(dev_net(pkt_dev->odev), pg_net_id);
if (!x) {
if (pkt_dev->spi) {
x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
} else {
x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0,
(xfrm_address_t *)&pkt_dev->cur_daddr,
(xfrm_address_t *)&pkt_dev->cur_saddr,
AF_INET,
pkt_dev->ipsmode,
pkt_dev->ipsproto, 0);
}
if (x) {
pkt_dev->flows[flow].x = x;
set_pkt_overhead(pkt_dev);
pkt_dev->pkt_overhead += x->props.header_len;
}
}
#endif
}
static void set_cur_queue_map(struct pktgen_dev *pkt_dev)
{
if (pkt_dev->flags & F_QUEUE_MAP_CPU)
pkt_dev->cur_queue_map = smp_processor_id();
else if (pkt_dev->queue_map_min <= pkt_dev->queue_map_max) {
__u16 t;
if (pkt_dev->flags & F_QUEUE_MAP_RND) {
t = get_random_u32_inclusive(pkt_dev->queue_map_min,
pkt_dev->queue_map_max);
} else {
t = pkt_dev->cur_queue_map + 1;
if (t > pkt_dev->queue_map_max)
t = pkt_dev->queue_map_min;
}
pkt_dev->cur_queue_map = t;
}
pkt_dev->cur_queue_map = pkt_dev->cur_queue_map % pkt_dev->odev->real_num_tx_queues;
}
static void mod_cur_headers(struct pktgen_dev *pkt_dev)
{
__u32 imn;
__u32 imx;
int flow = 0;
if (pkt_dev->cflows)
flow = f_pick(pkt_dev);
if (pkt_dev->src_mac_count > 1) {
__u32 mc;
__u32 tmp;
if (pkt_dev->flags & F_MACSRC_RND)
mc = get_random_u32_below(pkt_dev->src_mac_count);
else {
mc = pkt_dev->cur_src_mac_offset++;
if (pkt_dev->cur_src_mac_offset >=
pkt_dev->src_mac_count)
pkt_dev->cur_src_mac_offset = 0;
}
tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
pkt_dev->hh[11] = tmp;
tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
pkt_dev->hh[10] = tmp;
tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
pkt_dev->hh[9] = tmp;
tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
pkt_dev->hh[8] = tmp;
tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
pkt_dev->hh[7] = tmp;
}
if (pkt_dev->dst_mac_count > 1) {
__u32 mc;
__u32 tmp;
if (pkt_dev->flags & F_MACDST_RND)
mc = get_random_u32_below(pkt_dev->dst_mac_count);
else {
mc = pkt_dev->cur_dst_mac_offset++;
if (pkt_dev->cur_dst_mac_offset >=
pkt_dev->dst_mac_count) {
pkt_dev->cur_dst_mac_offset = 0;
}
}
tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
pkt_dev->hh[5] = tmp;
tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
pkt_dev->hh[4] = tmp;
tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
pkt_dev->hh[3] = tmp;
tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
pkt_dev->hh[2] = tmp;
tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
pkt_dev->hh[1] = tmp;
}
if (pkt_dev->flags & F_MPLS_RND) {
unsigned int i;
for (i = 0; i < pkt_dev->nr_labels; i++)
if (pkt_dev->labels[i] & MPLS_STACK_BOTTOM)
pkt_dev->labels[i] = MPLS_STACK_BOTTOM |
((__force __be32)get_random_u32() &
htonl(0x000fffff));
}
if ((pkt_dev->flags & F_VID_RND) && (pkt_dev->vlan_id != 0xffff)) {
pkt_dev->vlan_id = get_random_u32_below(4096);
}
if ((pkt_dev->flags & F_SVID_RND) && (pkt_dev->svlan_id != 0xffff)) {
pkt_dev->svlan_id = get_random_u32_below(4096);
}
if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
if (pkt_dev->flags & F_UDPSRC_RND)
pkt_dev->cur_udp_src = get_random_u32_inclusive(pkt_dev->udp_src_min,
pkt_dev->udp_src_max - 1);
else {
pkt_dev->cur_udp_src++;
if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
}
}
if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
if (pkt_dev->flags & F_UDPDST_RND) {
pkt_dev->cur_udp_dst = get_random_u32_inclusive(pkt_dev->udp_dst_min,
pkt_dev->udp_dst_max - 1);
} else {
pkt_dev->cur_udp_dst++;
if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
}
}
if (!(pkt_dev->flags & F_IPV6)) {
imn = ntohl(pkt_dev->saddr_min);
imx = ntohl(pkt_dev->saddr_max);
if (imn < imx) {
__u32 t;
if (pkt_dev->flags & F_IPSRC_RND)
t = get_random_u32_inclusive(imn, imx - 1);
else {
t = ntohl(pkt_dev->cur_saddr);
t++;
if (t > imx)
t = imn;
}
pkt_dev->cur_saddr = htonl(t);
}
if (pkt_dev->cflows && f_seen(pkt_dev, flow)) {
pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
} else {
imn = ntohl(pkt_dev->daddr_min);
imx = ntohl(pkt_dev->daddr_max);
if (imn < imx) {
__u32 t;
__be32 s;
if (pkt_dev->flags & F_IPDST_RND) {
do {
t = get_random_u32_inclusive(imn, imx - 1);
s = htonl(t);
} while (ipv4_is_loopback(s) ||
ipv4_is_multicast(s) ||
ipv4_is_lbcast(s) ||
ipv4_is_zeronet(s) ||
ipv4_is_local_multicast(s));
pkt_dev->cur_daddr = s;
} else {
t = ntohl(pkt_dev->cur_daddr);
t++;
if (t > imx) {
t = imn;
}
pkt_dev->cur_daddr = htonl(t);
}
}
if (pkt_dev->cflows) {
pkt_dev->flows[flow].flags |= F_INIT;
pkt_dev->flows[flow].cur_daddr =
pkt_dev->cur_daddr;
if (pkt_dev->flags & F_IPSEC)
get_ipsec_sa(pkt_dev, flow);
pkt_dev->nflows++;
}
}
} else {
if (!ipv6_addr_any(&pkt_dev->min_in6_daddr)) {
int i;
for (i = 0; i < 4; i++) {
pkt_dev->cur_in6_daddr.s6_addr32[i] =
(((__force __be32)get_random_u32() |
pkt_dev->min_in6_daddr.s6_addr32[i]) &
pkt_dev->max_in6_daddr.s6_addr32[i]);
}
}
}
if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
__u32 t;
if (pkt_dev->flags & F_TXSIZE_RND) {
t = get_random_u32_inclusive(pkt_dev->min_pkt_size,
pkt_dev->max_pkt_size - 1);
} else {
t = pkt_dev->cur_pkt_size + 1;
if (t > pkt_dev->max_pkt_size)
t = pkt_dev->min_pkt_size;
}
pkt_dev->cur_pkt_size = t;
} else if (pkt_dev->n_imix_entries > 0) {
struct imix_pkt *entry;
__u32 t = get_random_u32_below(IMIX_PRECISION);
__u8 entry_index = pkt_dev->imix_distribution[t];
entry = &pkt_dev->imix_entries[entry_index];
entry->count_so_far++;
pkt_dev->cur_pkt_size = entry->size;
}
set_cur_queue_map(pkt_dev);
pkt_dev->flows[flow].count++;
}
static void fill_imix_distribution(struct pktgen_dev *pkt_dev)
{
int cumulative_probabilites[MAX_IMIX_ENTRIES];
int j = 0;
__u64 cumulative_prob = 0;
__u64 total_weight = 0;
int i = 0;
for (i = 0; i < pkt_dev->n_imix_entries; i++)
total_weight += pkt_dev->imix_entries[i].weight;
for (i = 0; i < pkt_dev->n_imix_entries - 1; i++) {
cumulative_prob += div64_u64(pkt_dev->imix_entries[i].weight *
IMIX_PRECISION,
total_weight);
cumulative_probabilites[i] = cumulative_prob;
}
cumulative_probabilites[pkt_dev->n_imix_entries - 1] = 100;
for (i = 0; i < IMIX_PRECISION; i++) {
if (i == cumulative_probabilites[j])
j++;
pkt_dev->imix_distribution[i] = j;
}
}
#ifdef CONFIG_XFRM
static u32 pktgen_dst_metrics[RTAX_MAX + 1] = {
[RTAX_HOPLIMIT] = 0x5,
};
static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
{
struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
int err = 0;
struct net *net = dev_net(pkt_dev->odev);
if (!x)
return 0;
if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
return 0;
if ((x->props.mode == XFRM_MODE_TUNNEL) && (pkt_dev->spi != 0))
skb->_skb_refdst = (unsigned long)&pkt_dev->xdst.u.dst | SKB_DST_NOREF;
rcu_read_lock_bh();
err = pktgen_xfrm_outer_mode_output(x, skb);
rcu_read_unlock_bh();
if (err) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEMODEERROR);
goto error;
}
err = x->type->output(x, skb);
if (err) {
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTSTATEPROTOERROR);
goto error;
}
spin_lock_bh(&x->lock);
x->curlft.bytes += skb->len;
x->curlft.packets++;
spin_unlock_bh(&x->lock);
error:
return err;
}
static void free_SAs(struct pktgen_dev *pkt_dev)
{
if (pkt_dev->cflows) {
int i;
for (i = 0; i < pkt_dev->cflows; i++) {
struct xfrm_state *x = pkt_dev->flows[i].x;
if (x) {
xfrm_state_put(x);
pkt_dev->flows[i].x = NULL;
}
}
}
}
static int process_ipsec(struct pktgen_dev *pkt_dev,
struct sk_buff *skb, __be16 protocol)
{
if (pkt_dev->flags & F_IPSEC) {
struct xfrm_state *x = pkt_dev->flows[pkt_dev->curfl].x;
int nhead = 0;
if (x) {
struct ethhdr *eth;
struct iphdr *iph;
int ret;
nhead = x->props.header_len - skb_headroom(skb);
if (nhead > 0) {
ret = pskb_expand_head(skb, nhead, 0, GFP_ATOMIC);
if (ret < 0) {
pr_err("Error expanding ipsec packet %d\n",
ret);
goto err;
}
}
skb_pull(skb, ETH_HLEN);
ret = pktgen_output_ipsec(skb, pkt_dev);
if (ret) {
pr_err("Error creating ipsec packet %d\n", ret);
goto err;
}
eth = skb_push(skb, ETH_HLEN);
memcpy(eth, pkt_dev->hh, 2 * ETH_ALEN);
eth->h_proto = protocol;
iph = ip_hdr(skb);
iph->tot_len = htons(skb->len - ETH_HLEN);
ip_send_check(iph);
}
}
return 1;
err:
kfree_skb(skb);
return 0;
}
#endif
static void mpls_push(__be32 *mpls, struct pktgen_dev *pkt_dev)
{
unsigned int i;
for (i = 0; i < pkt_dev->nr_labels; i++)
*mpls++ = pkt_dev->labels[i] & ~MPLS_STACK_BOTTOM;
mpls--;
*mpls |= MPLS_STACK_BOTTOM;
}
static inline __be16 build_tci(unsigned int id, unsigned int cfi,
unsigned int prio)
{
return htons(id | (cfi << 12) | (prio << 13));
}
static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
int datalen)
{
struct timespec64 timestamp;
struct pktgen_hdr *pgh;
pgh = skb_put(skb, sizeof(*pgh));
datalen -= sizeof(*pgh);
if (pkt_dev->nfrags <= 0) {
skb_put_zero(skb, datalen);
} else {
int frags = pkt_dev->nfrags;
int i, len;
int frag_len;
if (frags > MAX_SKB_FRAGS)
frags = MAX_SKB_FRAGS;
len = datalen - frags * PAGE_SIZE;
if (len > 0) {
skb_put_zero(skb, len);
datalen = frags * PAGE_SIZE;
}
i = 0;
frag_len = min_t(int, datalen / frags, PAGE_SIZE);
while (datalen > 0) {
if (unlikely(!pkt_dev->page)) {
int node = numa_node_id();
if (pkt_dev->node >= 0 && (pkt_dev->flags & F_NODE))
node = pkt_dev->node;
pkt_dev->page = alloc_pages_node(node, GFP_KERNEL | __GFP_ZERO, 0);
if (!pkt_dev->page)
break;
}
get_page(pkt_dev->page);
if (i == (frags - 1))
skb_frag_fill_page_desc(&skb_shinfo(skb)->frags[i],
pkt_dev->page, 0,
min(datalen, PAGE_SIZE));
else
skb_frag_fill_page_desc(&skb_shinfo(skb)->frags[i],
pkt_dev->page, 0, frag_len);
datalen -= skb_frag_size(&skb_shinfo(skb)->frags[i]);
skb->len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
skb->data_len += skb_frag_size(&skb_shinfo(skb)->frags[i]);
i++;
skb_shinfo(skb)->nr_frags = i;
}
}
pgh->pgh_magic = htonl(PKTGEN_MAGIC);
pgh->seq_num = htonl(pkt_dev->seq_num);
if (pkt_dev->flags & F_NO_TIMESTAMP) {
pgh->tv_sec = 0;
pgh->tv_usec = 0;
} else {
ktime_get_real_ts64(×tamp);
pgh->tv_sec = htonl(timestamp.tv_sec);
pgh->tv_usec = htonl(timestamp.tv_nsec / NSEC_PER_USEC);
}
}
static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
struct pktgen_dev *pkt_dev)
{
unsigned int extralen = LL_RESERVED_SPACE(dev);
struct sk_buff *skb = NULL;
unsigned int size;
size = pkt_dev->cur_pkt_size + 64 + extralen + pkt_dev->pkt_overhead;
if (pkt_dev->flags & F_NODE) {
int node = pkt_dev->node >= 0 ? pkt_dev->node : numa_node_id();
skb = __alloc_skb(NET_SKB_PAD + size, GFP_NOWAIT, 0, node);
if (likely(skb)) {
skb_reserve(skb, NET_SKB_PAD);
skb->dev = dev;
}
} else {
skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
}
if (likely(skb))
skb_reserve(skb, extralen - 16);
return skb;
}
static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
struct pktgen_dev *pkt_dev)
{
struct sk_buff *skb = NULL;
__u8 *eth;
struct udphdr *udph;
int datalen, iplen;
struct iphdr *iph;
__be16 protocol = htons(ETH_P_IP);
__be32 *mpls;
__be16 *vlan_tci = NULL;
__be16 *vlan_encapsulated_proto = NULL;
__be16 *svlan_tci = NULL;
__be16 *svlan_encapsulated_proto = NULL;
u16 queue_map;
if (pkt_dev->nr_labels)
protocol = htons(ETH_P_MPLS_UC);
if (pkt_dev->vlan_id != 0xffff)
protocol = htons(ETH_P_8021Q);
mod_cur_headers(pkt_dev);
queue_map = pkt_dev->cur_queue_map;
skb = pktgen_alloc_skb(odev, pkt_dev);
if (!skb) {
sprintf(pkt_dev->result, "No memory");
return NULL;
}
prefetchw(skb->data);
skb_reserve(skb, 16);
eth = skb_push(skb, 14);
mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
if (pkt_dev->nr_labels)
mpls_push(mpls, pkt_dev);
if (pkt_dev->vlan_id != 0xffff) {
if (pkt_dev->svlan_id != 0xffff) {
svlan_tci = skb_put(skb, sizeof(__be16));
*svlan_tci = build_tci(pkt_dev->svlan_id,
pkt_dev->svlan_cfi,
pkt_dev->svlan_p);
svlan_encapsulated_proto = skb_put(skb,
sizeof(__be16));
*svlan_encapsulated_proto = htons(ETH_P_8021Q);
}
vlan_tci = skb_put(skb, sizeof(__be16));
*vlan_tci = build_tci(pkt_dev->vlan_id,
pkt_dev->vlan_cfi,
pkt_dev->vlan_p);
vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
*vlan_encapsulated_proto = htons(ETH_P_IP);
}
skb_reset_mac_header(skb);
skb_set_network_header(skb, skb->len);
iph = skb_put(skb, sizeof(struct iphdr));
skb_set_transport_header(skb, skb->len);
udph = skb_put(skb, sizeof(struct udphdr));
skb_set_queue_mapping(skb, queue_map);
skb->priority = pkt_dev->skb_priority;
memcpy(eth, pkt_dev->hh, 12);
*(__be16 *)ð[12] = protocol;
datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
pkt_dev->pkt_overhead;
if (datalen < 0 || datalen < sizeof(struct pktgen_hdr))
datalen = sizeof(struct pktgen_hdr);
udph->source = htons(pkt_dev->cur_udp_src);
udph->dest = htons(pkt_dev->cur_udp_dst);
udph->len = htons(datalen + 8);
udph->check = 0;
iph->ihl = 5;
iph->version = 4;
iph->ttl = 32;
iph->tos = pkt_dev->tos;
iph->protocol = IPPROTO_UDP;
iph->saddr = pkt_dev->cur_saddr;
iph->daddr = pkt_dev->cur_daddr;
iph->id = htons(pkt_dev->ip_id);
pkt_dev->ip_id++;
iph->frag_off = 0;
iplen = 20 + 8 + datalen;
iph->tot_len = htons(iplen);
ip_send_check(iph);
skb->protocol = protocol;
skb->dev = odev;
skb->pkt_type = PACKET_HOST;
pktgen_finalize_skb(pkt_dev, skb, datalen);
if (!(pkt_dev->flags & F_UDPCSUM)) {
skb->ip_summed = CHECKSUM_NONE;
} else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IP_CSUM)) {
skb->ip_summed = CHECKSUM_PARTIAL;
skb->csum = 0;
udp4_hwcsum(skb, iph->saddr, iph->daddr);
} else {
__wsum csum = skb_checksum(skb, skb_transport_offset(skb), datalen + 8, 0);
udph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
datalen + 8, IPPROTO_UDP, csum);
if (udph->check == 0)
udph->check = CSUM_MANGLED_0;
}
#ifdef CONFIG_XFRM
if (!process_ipsec(pkt_dev, skb, protocol))
return NULL;
#endif
return skb;
}
static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
struct pktgen_dev *pkt_dev)
{
struct sk_buff *skb = NULL;
__u8 *eth;
struct udphdr *udph;
int datalen, udplen;
struct ipv6hdr *iph;
__be16 protocol = htons(ETH_P_IPV6);
__be32 *mpls;
__be16 *vlan_tci = NULL;
__be16 *vlan_encapsulated_proto = NULL;
__be16 *svlan_tci = NULL;
__be16 *svlan_encapsulated_proto = NULL;
u16 queue_map;
if (pkt_dev->nr_labels)
protocol = htons(ETH_P_MPLS_UC);
if (pkt_dev->vlan_id != 0xffff)
protocol = htons(ETH_P_8021Q);
mod_cur_headers(pkt_dev);
queue_map = pkt_dev->cur_queue_map;
skb = pktgen_alloc_skb(odev, pkt_dev);
if (!skb) {
sprintf(pkt_dev->result, "No memory");
return NULL;
}
prefetchw(skb->data);
skb_reserve(skb, 16);
eth = skb_push(skb, 14);
mpls = skb_put(skb, pkt_dev->nr_labels * sizeof(__u32));
if (pkt_dev->nr_labels)
mpls_push(mpls, pkt_dev);
if (pkt_dev->vlan_id != 0xffff) {
if (pkt_dev->svlan_id != 0xffff) {
svlan_tci = skb_put(skb, sizeof(__be16));
*svlan_tci = build_tci(pkt_dev->svlan_id,
pkt_dev->svlan_cfi,
pkt_dev->svlan_p);
svlan_encapsulated_proto = skb_put(skb,
sizeof(__be16));
*svlan_encapsulated_proto = htons(ETH_P_8021Q);
}
vlan_tci = skb_put(skb, sizeof(__be16));
*vlan_tci = build_tci(pkt_dev->vlan_id,
pkt_dev->vlan_cfi,
pkt_dev->vlan_p);
vlan_encapsulated_proto = skb_put(skb, sizeof(__be16));
*vlan_encapsulated_proto = htons(ETH_P_IPV6);
}
skb_reset_mac_header(skb);
skb_set_network_header(skb, skb->len);
iph = skb_put(skb, sizeof(struct ipv6hdr));
skb_set_transport_header(skb, skb->len);
udph = skb_put(skb, sizeof(struct udphdr));
skb_set_queue_mapping(skb, queue_map);
skb->priority = pkt_dev->skb_priority;
memcpy(eth, pkt_dev->hh, 12);
*(__be16 *) ð[12] = protocol;
datalen = pkt_dev->cur_pkt_size - 14 -
sizeof(struct ipv6hdr) - sizeof(struct udphdr) -
pkt_dev->pkt_overhead;
if (datalen < 0 || datalen < sizeof(struct pktgen_hdr)) {
datalen = sizeof(struct pktgen_hdr);
net_info_ratelimited("increased datalen to %d\n", datalen);
}
udplen = datalen + sizeof(struct udphdr);
udph->source = htons(pkt_dev->cur_udp_src);
udph->dest = htons(pkt_dev->cur_udp_dst);
udph->len = htons(udplen);
udph->check = 0;
*(__be32 *) iph = htonl(0x60000000);
if (pkt_dev->traffic_class) {
*(__be32 *)iph |= htonl(0x60000000 | (pkt_dev->traffic_class << 20));
}
iph->hop_limit = 32;
iph->payload_len = htons(udplen);
iph->nexthdr = IPPROTO_UDP;
iph->daddr = pkt_dev->cur_in6_daddr;
iph->saddr = pkt_dev->cur_in6_saddr;
skb->protocol = protocol;
skb->dev = odev;
skb->pkt_type = PACKET_HOST;
pktgen_finalize_skb(pkt_dev, skb, datalen);
if (!(pkt_dev->flags & F_UDPCSUM)) {
skb->ip_summed = CHECKSUM_NONE;
} else if (odev->features & (NETIF_F_HW_CSUM | NETIF_F_IPV6_CSUM)) {
skb->ip_summed = CHECKSUM_PARTIAL;
skb->csum_start = skb_transport_header(skb) - skb->head;
skb->csum_offset = offsetof(struct udphdr, check);
udph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, 0);
} else {
__wsum csum = skb_checksum(skb, skb_transport_offset(skb), udplen, 0);
udph->check = csum_ipv6_magic(&iph->saddr, &iph->daddr, udplen, IPPROTO_UDP, csum);
if (udph->check == 0)
udph->check = CSUM_MANGLED_0;
}
return skb;
}
static struct sk_buff *fill_packet(struct net_device *odev,
struct pktgen_dev *pkt_dev)
{
if (pkt_dev->flags & F_IPV6)
return fill_packet_ipv6(odev, pkt_dev);
else
return fill_packet_ipv4(odev, pkt_dev);
}
static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
{
pkt_dev->seq_num = 1;
pkt_dev->idle_acc = 0;
pkt_dev->sofar = 0;
pkt_dev->tx_bytes = 0;
pkt_dev->errors = 0;
}
static void pktgen_run(struct pktgen_thread *t)
{
struct pktgen_dev *pkt_dev;
int started = 0;
func_enter();
rcu_read_lock();
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
pktgen_setup_inject(pkt_dev);
if (pkt_dev->odev) {
pktgen_clear_counters(pkt_dev);
pkt_dev->skb = NULL;
pkt_dev->started_at = pkt_dev->next_tx = ktime_get();
set_pkt_overhead(pkt_dev);
strscpy(pkt_dev->result, "Starting");
pkt_dev->running = 1;
started++;
} else
strscpy(pkt_dev->result, "Error starting");
}
rcu_read_unlock();
if (started)
t->control &= ~(T_STOP);
}
static void pktgen_handle_all_threads(struct pktgen_net *pn, u32 flags)
{
struct pktgen_thread *t;
mutex_lock(&pktgen_thread_lock);
list_for_each_entry(t, &pn->pktgen_threads, th_list)
t->control |= (flags);
mutex_unlock(&pktgen_thread_lock);
}
static void pktgen_stop_all_threads(struct pktgen_net *pn)
{
func_enter();
pktgen_handle_all_threads(pn, T_STOP);
}
static int thread_is_running(const struct pktgen_thread *t)
{
const struct pktgen_dev *pkt_dev;
rcu_read_lock();
list_for_each_entry_rcu(pkt_dev, &t->if_list, list)
if (pkt_dev->running) {
rcu_read_unlock();
return 1;
}
rcu_read_unlock();
return 0;
}
static int pktgen_wait_thread_run(struct pktgen_thread *t)
{
while (thread_is_running(t)) {
mutex_unlock(&pktgen_thread_lock);
msleep_interruptible(100);
mutex_lock(&pktgen_thread_lock);
if (signal_pending(current))
goto signal;
}
return 1;
signal:
return 0;
}
static int pktgen_wait_all_threads_run(struct pktgen_net *pn)
{
struct pktgen_thread *t;
int sig = 1;
if (!try_module_get(THIS_MODULE))
return sig;
mutex_lock(&pktgen_thread_lock);
list_for_each_entry(t, &pn->pktgen_threads, th_list) {
sig = pktgen_wait_thread_run(t);
if (sig == 0)
break;
}
if (sig == 0)
list_for_each_entry(t, &pn->pktgen_threads, th_list)
t->control |= (T_STOP);
mutex_unlock(&pktgen_thread_lock);
module_put(THIS_MODULE);
return sig;
}
static void pktgen_run_all_threads(struct pktgen_net *pn)
{
func_enter();
pktgen_handle_all_threads(pn, T_RUN);
schedule_timeout_interruptible(msecs_to_jiffies(125));
pktgen_wait_all_threads_run(pn);
}
static void pktgen_reset_all_threads(struct pktgen_net *pn)
{
func_enter();
pktgen_handle_all_threads(pn, T_REMDEVALL);
schedule_timeout_interruptible(msecs_to_jiffies(125));
pktgen_wait_all_threads_run(pn);
}
static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
{
__u64 bps, mbps, pps;
char *p = pkt_dev->result;
ktime_t elapsed = ktime_sub(pkt_dev->stopped_at,
pkt_dev->started_at);
ktime_t idle = ns_to_ktime(pkt_dev->idle_acc);
p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
(unsigned long long)ktime_to_us(elapsed),
(unsigned long long)ktime_to_us(ktime_sub(elapsed, idle)),
(unsigned long long)ktime_to_us(idle),
(unsigned long long)pkt_dev->sofar,
pkt_dev->cur_pkt_size, nr_frags);
pps = div64_u64(pkt_dev->sofar * NSEC_PER_SEC,
ktime_to_ns(elapsed));
if (pkt_dev->n_imix_entries > 0) {
int i;
struct imix_pkt *entry;
bps = 0;
for (i = 0; i < pkt_dev->n_imix_entries; i++) {
entry = &pkt_dev->imix_entries[i];
bps += entry->size * entry->count_so_far;
}
bps = div64_u64(bps * 8 * NSEC_PER_SEC, ktime_to_ns(elapsed));
} else {
bps = pps * 8 * pkt_dev->cur_pkt_size;
}
mbps = bps;
do_div(mbps, 1000000);
p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
(unsigned long long)pps,
(unsigned long long)mbps,
(unsigned long long)bps,
(unsigned long long)pkt_dev->errors);
}
static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
{
int nr_frags = pkt_dev->skb ? skb_shinfo(pkt_dev->skb)->nr_frags : -1;
if (!pkt_dev->running) {
pr_warn("interface: %s is already stopped\n",
pkt_dev->odevname);
return -EINVAL;
}
pkt_dev->running = 0;
kfree_skb(pkt_dev->skb);
pkt_dev->skb = NULL;
pkt_dev->stopped_at = ktime_get();
show_results(pkt_dev, nr_frags);
return 0;
}
static struct pktgen_dev *next_to_run(struct pktgen_thread *t)
{
struct pktgen_dev *pkt_dev, *best = NULL;
rcu_read_lock();
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
if (!pkt_dev->running)
continue;
if (best == NULL)
best = pkt_dev;
else if (ktime_compare(pkt_dev->next_tx, best->next_tx) < 0)
best = pkt_dev;
}
rcu_read_unlock();
return best;
}
static void pktgen_stop(struct pktgen_thread *t)
{
struct pktgen_dev *pkt_dev;
func_enter();
rcu_read_lock();
list_for_each_entry_rcu(pkt_dev, &t->if_list, list) {
pktgen_stop_device(pkt_dev);
}
rcu_read_unlock();
}
static void pktgen_rem_one_if(struct pktgen_thread *t)
{
struct list_head *q, *n;
struct pktgen_dev *cur;
func_enter();
list_for_each_safe(q, n, &t->if_list) {
cur = list_entry(q, struct pktgen_dev, list);
if (!cur->removal_mark)
continue;
kfree_skb(cur->skb);
cur->skb = NULL;
pktgen_remove_device(t, cur);
break;
}
}
static void pktgen_rem_all_ifs(struct pktgen_thread *t)
{
struct list_head *q, *n;
struct pktgen_dev *cur;
func_enter();
list_for_each_safe(q, n, &t->if_list) {
cur = list_entry(q, struct pktgen_dev, list);
kfree_skb(cur->skb);
cur->skb = NULL;
pktgen_remove_device(t, cur);
}
}
static void pktgen_rem_thread(struct pktgen_thread *t)
{
remove_proc_entry(t->tsk->comm, t->net->proc_dir);
}
static void pktgen_resched(struct pktgen_dev *pkt_dev)
{
ktime_t idle_start = ktime_get();
schedule();
pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
}
static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
{
ktime_t idle_start = ktime_get();
while (refcount_read(&(pkt_dev->skb->users)) != 1) {
if (signal_pending(current))
break;
if (need_resched())
pktgen_resched(pkt_dev);
else
cpu_relax();
}
pkt_dev->idle_acc += ktime_to_ns(ktime_sub(ktime_get(), idle_start));
}
static void pktgen_xmit(struct pktgen_dev *pkt_dev)
{
bool skb_shared = !!(READ_ONCE(pkt_dev->flags) & F_SHARED);
struct net_device *odev = pkt_dev->odev;
struct netdev_queue *txq;
unsigned int burst = 1;
struct sk_buff *skb;
int clone_skb = 0;
int ret;
if (skb_shared) {
burst = READ_ONCE(pkt_dev->burst);
clone_skb = READ_ONCE(pkt_dev->clone_skb);
}
if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
pktgen_stop_device(pkt_dev);
return;
}
if (unlikely(pkt_dev->delay == ULLONG_MAX)) {
pkt_dev->next_tx = ktime_add_ns(ktime_get(), ULONG_MAX);
return;
}
if (!pkt_dev->skb || (pkt_dev->last_ok &&
++pkt_dev->clone_count >= clone_skb)) {
kfree_skb(pkt_dev->skb);
pkt_dev->skb = fill_packet(odev, pkt_dev);
if (pkt_dev->skb == NULL) {
pr_err("ERROR: couldn't allocate skb in fill_packet\n");
schedule();
pkt_dev->clone_count--;
return;
}
pkt_dev->last_pkt_size = pkt_dev->skb->len;
pkt_dev->clone_count = 0;
}
if (pkt_dev->delay && pkt_dev->last_ok)
spin(pkt_dev, pkt_dev->next_tx);
if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
skb = pkt_dev->skb;
skb->protocol = eth_type_trans(skb, skb->dev);
if (skb_shared)
refcount_add(burst, &skb->users);
local_bh_disable();
do {
ret = netif_receive_skb(skb);
if (ret == NET_RX_DROP)
pkt_dev->errors++;
pkt_dev->sofar++;
pkt_dev->seq_num++;
if (unlikely(!skb_shared)) {
pkt_dev->skb = NULL;
break;
}
if (refcount_read(&skb->users) != burst) {
WARN_ON(refcount_sub_and_test(burst - 1, &skb->users));
break;
}
skb_reset_redirect(skb);
} while (--burst > 0);
goto out;
} else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
local_bh_disable();
if (skb_shared)
refcount_inc(&pkt_dev->skb->users);
ret = dev_queue_xmit(pkt_dev->skb);
if (!skb_shared && dev_xmit_complete(ret))
pkt_dev->skb = NULL;
switch (ret) {
case NET_XMIT_SUCCESS:
pkt_dev->sofar++;
pkt_dev->seq_num++;
pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
break;
case NET_XMIT_DROP:
case NET_XMIT_CN:
case NETDEV_TX_BUSY:
default:
pkt_dev->errors++;
net_info_ratelimited("%s xmit error: %d\n",
pkt_dev->odevname, ret);
break;
}
goto out;
}
txq = skb_get_tx_queue(odev, pkt_dev->skb);
local_bh_disable();
HARD_TX_LOCK(odev, txq, smp_processor_id());
if (unlikely(netif_xmit_frozen_or_drv_stopped(txq))) {
pkt_dev->last_ok = 0;
goto unlock;
}
if (skb_shared)
refcount_add(burst, &pkt_dev->skb->users);
xmit_more:
ret = netdev_start_xmit(pkt_dev->skb, odev, txq, --burst > 0);
if (!skb_shared && dev_xmit_complete(ret))
pkt_dev->skb = NULL;
switch (ret) {
case NETDEV_TX_OK:
pkt_dev->last_ok = 1;
pkt_dev->sofar++;
pkt_dev->seq_num++;
pkt_dev->tx_bytes += pkt_dev->last_pkt_size;
if (burst > 0 && !netif_xmit_frozen_or_drv_stopped(txq))
goto xmit_more;
break;
case NET_XMIT_DROP:
case NET_XMIT_CN:
pkt_dev->errors++;
break;
default:
net_info_ratelimited("%s xmit error: %d\n",
pkt_dev->odevname, ret);
pkt_dev->errors++;
fallthrough;
case NETDEV_TX_BUSY:
if (skb_shared)
refcount_dec(&pkt_dev->skb->users);
pkt_dev->last_ok = 0;
}
if (unlikely(burst))
WARN_ON(refcount_sub_and_test(burst, &pkt_dev->skb->users));
unlock:
HARD_TX_UNLOCK(odev, txq);
out:
local_bh_enable();
if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
if (pkt_dev->skb)
pktgen_wait_for_skb(pkt_dev);
pktgen_stop_device(pkt_dev);
}
}
static int pktgen_thread_worker(void *arg)
{
struct pktgen_thread *t = arg;
struct pktgen_dev *pkt_dev = NULL;
int cpu = t->cpu;
WARN_ON_ONCE(smp_processor_id() != cpu);
init_waitqueue_head(&t->queue);
complete(&t->start_done);
pr_debug("starting pktgen/%d: pid=%d\n", cpu, task_pid_nr(current));
set_freezable();
while (!kthread_should_stop()) {
pkt_dev = next_to_run(t);
if (unlikely(!pkt_dev && t->control == 0)) {
if (t->net->pktgen_exiting)
break;
wait_event_freezable_timeout(t->queue,
t->control != 0, HZ / 10);
continue;
}
if (likely(pkt_dev)) {
pktgen_xmit(pkt_dev);
if (need_resched())
pktgen_resched(pkt_dev);
else
cpu_relax();
}
if (t->control & T_STOP) {
pktgen_stop(t);
t->control &= ~(T_STOP);
}
if (t->control & T_RUN) {
pktgen_run(t);
t->control &= ~(T_RUN);
}
if (t->control & T_REMDEVALL) {
pktgen_rem_all_ifs(t);
t->control &= ~(T_REMDEVALL);
}
if (t->control & T_REMDEV) {
pktgen_rem_one_if(t);
t->control &= ~(T_REMDEV);
}
try_to_freeze();
}
pr_debug("%s stopping all device\n", t->tsk->comm);
pktgen_stop(t);
pr_debug("%s removing all device\n", t->tsk->comm);
pktgen_rem_all_ifs(t);
pr_debug("%s removing thread\n", t->tsk->comm);
pktgen_rem_thread(t);
return 0;
}
static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
const char *ifname, bool exact)
{
struct pktgen_dev *p, *pkt_dev = NULL;
size_t len = strlen(ifname);
rcu_read_lock();
list_for_each_entry_rcu(p, &t->if_list, list)
if (strncmp(p->odevname, ifname, len) == 0) {
if (p->odevname[len]) {
if (exact || p->odevname[len] != '@')
continue;
}
pkt_dev = p;
break;
}
rcu_read_unlock();
pr_debug("find_dev(%s) returning %p\n", ifname, pkt_dev);
return pkt_dev;
}
static int add_dev_to_thread(struct pktgen_thread *t,
struct pktgen_dev *pkt_dev)
{
int rv = 0;
if_lock(t);
if (pkt_dev->pg_thread) {
pr_err("ERROR: already assigned to a thread\n");
rv = -EBUSY;
goto out;
}
pkt_dev->running = 0;
pkt_dev->pg_thread = t;
list_add_rcu(&pkt_dev->list, &t->if_list);
out:
if_unlock(t);
return rv;
}
static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
{
struct pktgen_dev *pkt_dev;
int err;
int node = cpu_to_node(t->cpu);
pkt_dev = __pktgen_NN_threads(t->net, ifname, FIND);
if (pkt_dev) {
pr_err("ERROR: interface already used\n");
return -EBUSY;
}
pkt_dev = kzalloc_node(sizeof(struct pktgen_dev), GFP_KERNEL, node);
if (!pkt_dev)
return -ENOMEM;
strscpy(pkt_dev->odevname, ifname);
pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS,
sizeof(struct flow_state)),
node);
if (pkt_dev->flows == NULL) {
kfree(pkt_dev);
return -ENOMEM;
}
pkt_dev->removal_mark = 0;
pkt_dev->nfrags = 0;
pkt_dev->delay = pg_delay_d;
pkt_dev->count = pg_count_d;
pkt_dev->sofar = 0;
pkt_dev->udp_src_min = 9;
pkt_dev->udp_src_max = 9;
pkt_dev->udp_dst_min = 9;
pkt_dev->udp_dst_max = 9;
pkt_dev->vlan_p = 0;
pkt_dev->vlan_cfi = 0;
pkt_dev->vlan_id = 0xffff;
pkt_dev->svlan_p = 0;
pkt_dev->svlan_cfi = 0;
pkt_dev->svlan_id = 0xffff;
pkt_dev->burst = 1;
pkt_dev->node = NUMA_NO_NODE;
pkt_dev->flags = F_SHARED;
err = pktgen_setup_dev(t->net, pkt_dev, ifname);
if (err)
goto out1;
if (pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)
pkt_dev->clone_skb = pg_clone_skb_d;
pkt_dev->entry = proc_create_data(ifname, 0600, t->net->proc_dir,
&pktgen_if_proc_ops, pkt_dev);
if (!pkt_dev->entry) {
pr_err("cannot create %s/%s procfs entry\n",
PG_PROC_DIR, ifname);
err = -EINVAL;
goto out2;
}
#ifdef CONFIG_XFRM
pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
pkt_dev->ipsproto = IPPROTO_ESP;
pkt_dev->dstops.family = AF_INET;
pkt_dev->xdst.u.dst.dev = pkt_dev->odev;
dst_init_metrics(&pkt_dev->xdst.u.dst, pktgen_dst_metrics, false);
pkt_dev->xdst.child = &pkt_dev->xdst.u.dst;
pkt_dev->xdst.u.dst.ops = &pkt_dev->dstops;
#endif
return add_dev_to_thread(t, pkt_dev);
out2:
netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker);
out1:
#ifdef CONFIG_XFRM
free_SAs(pkt_dev);
#endif
vfree(pkt_dev->flows);
kfree(pkt_dev);
return err;
}
static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
{
struct pktgen_thread *t;
struct proc_dir_entry *pe;
struct task_struct *p;
t = kzalloc_node(sizeof(struct pktgen_thread), GFP_KERNEL,
cpu_to_node(cpu));
if (!t) {
pr_err("ERROR: out of memory, can't create new thread\n");
return -ENOMEM;
}
mutex_init(&t->if_lock);
t->cpu = cpu;
INIT_LIST_HEAD(&t->if_list);
list_add_tail(&t->th_list, &pn->pktgen_threads);
init_completion(&t->start_done);
p = kthread_create_on_cpu(pktgen_thread_worker, t, cpu, "kpktgend_%d");
if (IS_ERR(p)) {
pr_err("kthread_create_on_node() failed for cpu %d\n", t->cpu);
list_del(&t->th_list);
kfree(t);
return PTR_ERR(p);
}
t->tsk = p;
pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
&pktgen_thread_proc_ops, t);
if (!pe) {
pr_err("cannot create %s/%s procfs entry\n",
PG_PROC_DIR, t->tsk->comm);
kthread_stop(p);
list_del(&t->th_list);
kfree(t);
return -EINVAL;
}
t->net = pn;
get_task_struct(p);
wake_up_process(p);
wait_for_completion(&t->start_done);
return 0;
}
static void _rem_dev_from_if_list(struct pktgen_thread *t,
struct pktgen_dev *pkt_dev)
{
struct list_head *q, *n;
struct pktgen_dev *p;
if_lock(t);
list_for_each_safe(q, n, &t->if_list) {
p = list_entry(q, struct pktgen_dev, list);
if (p == pkt_dev)
list_del_rcu(&p->list);
}
if_unlock(t);
}
static int pktgen_remove_device(struct pktgen_thread *t,
struct pktgen_dev *pkt_dev)
{
pr_debug("remove_device pkt_dev=%p\n", pkt_dev);
if (pkt_dev->running) {
pr_warn("WARNING: trying to remove a running interface, stopping it now\n");
pktgen_stop_device(pkt_dev);
}
if (pkt_dev->odev) {
netdev_put(pkt_dev->odev, &pkt_dev->dev_tracker);
pkt_dev->odev = NULL;
}
proc_remove(pkt_dev->entry);
_rem_dev_from_if_list(t, pkt_dev);
#ifdef CONFIG_XFRM
free_SAs(pkt_dev);
#endif
vfree(pkt_dev->flows);
if (pkt_dev->page)
put_page(pkt_dev->page);
kfree_rcu(pkt_dev, rcu);
return 0;
}
static int __net_init pg_net_init(struct net *net)
{
struct pktgen_net *pn = net_generic(net, pg_net_id);
struct proc_dir_entry *pe;
int cpu, ret = 0;
pn->net = net;
INIT_LIST_HEAD(&pn->pktgen_threads);
pn->pktgen_exiting = false;
pn->proc_dir = proc_mkdir(PG_PROC_DIR, pn->net->proc_net);
if (!pn->proc_dir) {
pr_warn("cannot create /proc/net/%s\n", PG_PROC_DIR);
return -ENODEV;
}
pe = proc_create(PGCTRL, 0600, pn->proc_dir, &pktgen_proc_ops);
if (pe == NULL) {
pr_err("cannot create %s procfs entry\n", PGCTRL);
ret = -EINVAL;
goto remove;
}
cpus_read_lock();
for_each_online_cpu(cpu) {
int err;
err = pktgen_create_thread(cpu, pn);
if (err)
pr_warn("Cannot create thread for cpu %d (%d)\n",
cpu, err);
}
cpus_read_unlock();
if (list_empty(&pn->pktgen_threads)) {
pr_err("Initialization failed for all threads\n");
ret = -ENODEV;
goto remove_entry;
}
return 0;
remove_entry:
remove_proc_entry(PGCTRL, pn->proc_dir);
remove:
remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
return ret;
}
static void __net_exit pg_net_exit(struct net *net)
{
struct pktgen_net *pn = net_generic(net, pg_net_id);
struct pktgen_thread *t;
struct list_head *q, *n;
LIST_HEAD(list);
pn->pktgen_exiting = true;
mutex_lock(&pktgen_thread_lock);
list_splice_init(&pn->pktgen_threads, &list);
mutex_unlock(&pktgen_thread_lock);
list_for_each_safe(q, n, &list) {
t = list_entry(q, struct pktgen_thread, th_list);
list_del(&t->th_list);
kthread_stop_put(t->tsk);
kfree(t);
}
remove_proc_entry(PGCTRL, pn->proc_dir);
remove_proc_entry(PG_PROC_DIR, pn->net->proc_net);
}
static struct pernet_operations pg_net_ops = {
.init = pg_net_init,
.exit = pg_net_exit,
.id = &pg_net_id,
.size = sizeof(struct pktgen_net),
};
static int __init pg_init(void)
{
int ret = 0;
pr_info("%s", version);
ret = register_pernet_subsys(&pg_net_ops);
if (ret)
return ret;
ret = register_netdevice_notifier(&pktgen_notifier_block);
if (ret)
unregister_pernet_subsys(&pg_net_ops);
return ret;
}
static void __exit pg_cleanup(void)
{
unregister_netdevice_notifier(&pktgen_notifier_block);
unregister_pernet_subsys(&pg_net_ops);
}
module_init(pg_init);
module_exit(pg_cleanup);
MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se>");
MODULE_DESCRIPTION("Packet Generator tool");
MODULE_LICENSE("GPL");
MODULE_VERSION(VERSION);
module_param(pg_count_d, int, 0);
MODULE_PARM_DESC(pg_count_d, "Default number of packets to inject");
module_param(pg_delay_d, int, 0);
MODULE_PARM_DESC(pg_delay_d, "Default delay between packets (nanoseconds)");
module_param(pg_clone_skb_d, int, 0);
MODULE_PARM_DESC(pg_clone_skb_d, "Default number of copies of the same packet");
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Enable debugging of pktgen module");
