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Diffstat (limited to 'net/core/pktgen.c')
-rw-r--r--net/core/pktgen.c617
1 files changed, 358 insertions, 259 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 760238196db1..d41b03fd1f63 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -69,7 +69,7 @@
*
* By design there should only be *one* "controlling" process. In practice
* multiple write accesses gives unpredictable result. Understood by "write"
- * to /proc gives result code thats should be read be the "writer".
+ * to /proc gives result code that should be read be the "writer".
* For practical use this should be no problem.
*
* Note when adding devices to a specific CPU there good idea to also assign
@@ -114,6 +114,7 @@
#include <linux/sys.h>
#include <linux/types.h>
+#include <linux/minmax.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
@@ -158,9 +159,7 @@
#include <net/udp.h>
#include <net/ip6_checksum.h>
#include <net/addrconf.h>
-#ifdef CONFIG_XFRM
#include <net/xfrm.h>
-#endif
#include <net/netns/generic.h>
#include <asm/byteorder.h>
#include <linux/rcupdate.h>
@@ -179,7 +178,7 @@
#define MAX_IMIX_ENTRIES 20
#define IMIX_PRECISION 100 /* Precision of IMIX distribution */
-#define func_enter() pr_debug("entering %s\n", __func__);
+#define func_enter() pr_debug("entering %s\n", __func__)
#define PKT_FLAGS \
pf(IPV6) /* Interface in IPV6 Mode */ \
@@ -200,6 +199,7 @@
pf(VID_RND) /* Random VLAN ID */ \
pf(SVID_RND) /* Random SVLAN ID */ \
pf(NODE) /* Node memory alloc*/ \
+ pf(SHARED) /* Shared SKB */ \
#define pf(flag) flag##_SHIFT,
enum pkt_flags {
@@ -228,12 +228,12 @@ static char *pkt_flag_names[] = {
/* Xmit modes */
#define M_START_XMIT 0 /* Default normal TX */
-#define M_NETIF_RECEIVE 1 /* Inject packets into stack */
+#define M_NETIF_RECEIVE 1 /* Inject packets into stack */
#define M_QUEUE_XMIT 2 /* Inject packet into qdisc */
/* If lock -- protects updating of if_list */
-#define if_lock(t) mutex_lock(&(t->if_lock));
-#define if_unlock(t) mutex_unlock(&(t->if_lock));
+#define if_lock(t) mutex_lock(&(t->if_lock))
+#define if_unlock(t) mutex_unlock(&(t->if_lock))
/* Used to help with determining the pkts on receive */
#define PKTGEN_MAGIC 0xbe9be955
@@ -284,7 +284,8 @@ struct pktgen_dev {
int pkt_overhead; /* overhead for MPLS, VLANs, IPSEC etc */
int nfrags;
int removal_mark; /* non-zero => the device is marked for
- * removal by worker thread */
+ * removal by worker thread
+ */
struct page *page;
u64 delay; /* nano-seconds */
@@ -347,10 +348,12 @@ struct pktgen_dev {
__u16 udp_dst_max; /* exclusive, dest UDP port */
/* DSCP + ECN */
- __u8 tos; /* six MSB of (former) IPv4 TOS
- are for dscp codepoint */
- __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
- (see RFC 3260, sec. 4) */
+ __u8 tos; /* six MSB of (former) IPv4 TOS
+ * are for dscp codepoint
+ */
+ __u8 traffic_class; /* ditto for the (former) Traffic Class in IPv6
+ * (see RFC 3260, sec. 4)
+ */
/* IMIX */
unsigned int n_imix_entries;
@@ -390,12 +393,12 @@ struct pktgen_dev {
__u8 hh[14];
/* = {
- 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
-
- We fill in SRC address later
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
- 0x08, 0x00
- };
+ * 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
+ *
+ * We fill in SRC address later
+ * 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ * 0x08, 0x00
+ * };
*/
__u16 pad; /* pad out the hh struct to an even 16 bytes */
@@ -459,7 +462,8 @@ struct pktgen_thread {
char result[512];
/* Field for thread to receive "posted" events terminate,
- stop ifs etc. */
+ * stop ifs etc.
+ */
u32 control;
int cpu;
@@ -473,8 +477,7 @@ struct pktgen_thread {
#define FIND 0
static const char version[] =
- "Packet Generator for packet performance testing. "
- "Version: " VERSION "\n";
+ "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);
@@ -516,21 +519,23 @@ 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 == 0)
+ if (count < 1)
return -EINVAL;
- if (count > sizeof(data))
- count = sizeof(data);
-
- if (copy_from_user(data, buf, count))
+ max = min(count, sizeof(data) - 1);
+ if (copy_from_user(data, buf, max))
return -EFAULT;
- data[count - 1] = 0; /* Strip trailing '\n' and terminate string */
+ if (data[max - 1] == '\n')
+ data[max - 1] = 0; /* strip trailing '\n', terminate string */
+ else
+ data[max] = 0; /* terminate string */
if (!strcmp(data, "stop"))
pktgen_stop_all_threads(pn);
@@ -623,8 +628,7 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
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",
+ " 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);
@@ -669,19 +673,19 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
seq_puts(seq, " Flags: ");
for (i = 0; i < NR_PKT_FLAGS; i++) {
- if (i == F_FLOW_SEQ)
+ if (i == FLOW_SEQ_SHIFT)
if (!pkt_dev->cflows)
continue;
- if (pkt_dev->flags & (1 << i))
+ if (pkt_dev->flags & (1 << i)) {
seq_printf(seq, "%s ", pkt_flag_names[i]);
- else if (i == F_FLOW_SEQ)
- seq_puts(seq, "FLOW_RND ");
-
#ifdef CONFIG_XFRM
- if (i == F_IPSEC && pkt_dev->spi)
- seq_printf(seq, "spi:%u", pkt_dev->spi);
+ 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");
@@ -743,34 +747,37 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
}
-static int hex32_arg(const char __user *user_buffer, unsigned long maxlen,
- __u32 *num)
+static ssize_t hex32_arg(const char __user *user_buffer, size_t maxlen,
+ __u32 *num)
{
- int i = 0;
+ size_t i = 0;
+
*num = 0;
for (; i < maxlen; i++) {
int value;
char c;
- *num <<= 4;
+
if (get_user(c, &user_buffer[i]))
return -EFAULT;
value = hex_to_bin(c);
- if (value >= 0)
+ if (value >= 0) {
+ *num <<= 4;
*num |= value;
- else
+ } else {
break;
+ }
}
return i;
}
-static int count_trail_chars(const char __user * user_buffer,
- unsigned int maxlen)
+static ssize_t count_trail_chars(const char __user *user_buffer, size_t maxlen)
{
- int i;
+ size_t i;
for (i = 0; i < maxlen; i++) {
char c;
+
if (get_user(c, &user_buffer[i]))
return -EFAULT;
switch (c) {
@@ -789,14 +796,15 @@ done:
return i;
}
-static long num_arg(const char __user *user_buffer, unsigned long maxlen,
- unsigned long *num)
+static ssize_t num_arg(const char __user *user_buffer, size_t maxlen,
+ unsigned long *num)
{
- int i;
+ 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')) {
@@ -808,12 +816,13 @@ static long num_arg(const char __user *user_buffer, unsigned long maxlen,
return i;
}
-static int strn_len(const char __user * user_buffer, unsigned int maxlen)
+static ssize_t strn_len(const char __user *user_buffer, size_t maxlen)
{
- int i;
+ size_t i;
for (i = 0; i < maxlen; i++) {
char c;
+
if (get_user(c, &user_buffer[i]))
return -EFAULT;
switch (c) {
@@ -822,6 +831,7 @@ static int strn_len(const char __user * user_buffer, unsigned int maxlen)
case '\r':
case '\t':
case ' ':
+ case '=':
goto done_str;
default:
break;
@@ -837,11 +847,11 @@ done_str:
* "size1,weight_1 size2,weight_2 ... size_n,weight_n" for example.
*/
static ssize_t get_imix_entries(const char __user *buffer,
+ size_t maxlen,
struct pktgen_dev *pkt_dev)
{
- const int max_digits = 10;
- int i = 0;
- long len;
+ size_t i = 0, max;
+ ssize_t len;
char c;
pkt_dev->n_imix_entries = 0;
@@ -850,21 +860,33 @@ static ssize_t get_imix_entries(const char __user *buffer,
unsigned long weight;
unsigned long size;
- len = num_arg(&buffer[i], max_digits, &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;
/* Check for comma between size_i and weight_i */
if (c != ',')
return -EINVAL;
i++;
+ if (i >= maxlen)
+ return -EINVAL;
if (size < 14 + 20 + 8)
size = 14 + 20 + 8;
- len = num_arg(&buffer[i], max_digits, &weight);
+ max = min(10, maxlen - i);
+ len = num_arg(&buffer[i], max, &weight);
if (len < 0)
return len;
if (weight <= 0)
@@ -874,42 +896,55 @@ static ssize_t get_imix_entries(const char __user *buffer,
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++;
- pkt_dev->n_imix_entries++;
-
- if (pkt_dev->n_imix_entries > MAX_IMIX_ENTRIES)
- return -E2BIG;
} while (c == ' ');
return i;
}
-static ssize_t get_labels(const char __user *buffer, struct pktgen_dev *pkt_dev)
+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;
- ssize_t i = 0;
- int len;
pkt_dev->nr_labels = 0;
do {
__u32 tmp;
- len = hex32_arg(&buffer[i], 8, &tmp);
- if (len <= 0)
+
+ 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;
+
+ /* return empty list in case of invalid input or zero value */
+ 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++;
- n++;
- if (n >= MAX_MPLS_LABELS)
- return -E2BIG;
} while (c == ',');
pkt_dev->nr_labels = n;
@@ -946,16 +981,16 @@ static __u32 pktgen_read_flag(const char *f, bool *disable)
}
static ssize_t pktgen_if_write(struct file *file,
- const char __user * user_buffer, size_t count,
- loff_t * offset)
+ 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;
- int i, max, len;
+ size_t i, max;
+ ssize_t len;
char name[16], valstr[32];
unsigned long value = 0;
char *pg_result = NULL;
- int tmp = 0;
char buf[128];
pg_result = &(pkt_dev->result[0]);
@@ -966,16 +1001,16 @@ static ssize_t pktgen_if_write(struct file *file,
}
max = count;
- tmp = count_trail_chars(user_buffer, max);
- if (tmp < 0) {
+ len = count_trail_chars(user_buffer, max);
+ if (len < 0) {
pr_warn("illegal format\n");
- return tmp;
+ return len;
}
- i = tmp;
+ i = len;
/* Read variable name */
-
- len = strn_len(&user_buffer[i], sizeof(name) - 1);
+ max = min(sizeof(name) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1003,11 +1038,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "min_pkt_size")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value < 14 + 20 + 8)
value = 14 + 20 + 8;
if (value != pkt_dev->min_pkt_size) {
@@ -1020,11 +1055,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "max_pkt_size")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value < 14 + 20 + 8)
value = 14 + 20 + 8;
if (value != pkt_dev->max_pkt_size) {
@@ -1039,11 +1074,11 @@ static ssize_t pktgen_if_write(struct file *file,
/* Shortcut for min = max */
if (!strcmp(name, "pkt_size")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value < 14 + 20 + 8)
value = 14 + 20 + 8;
if (value != pkt_dev->min_pkt_size) {
@@ -1059,43 +1094,43 @@ static ssize_t pktgen_if_write(struct file *file,
if (pkt_dev->clone_skb > 0)
return -EINVAL;
- len = get_imix_entries(&user_buffer[i], pkt_dev);
+ max = count - i;
+ len = get_imix_entries(&user_buffer[i], max, pkt_dev);
if (len < 0)
return len;
fill_imix_distribution(pkt_dev);
- i += len;
return count;
}
if (!strcmp(name, "debug")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
debug = value;
sprintf(pg_result, "OK: debug=%u", debug);
return count;
}
if (!strcmp(name, "frags")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
pkt_dev->nfrags = value;
sprintf(pg_result, "OK: frags=%d", pkt_dev->nfrags);
return count;
}
if (!strcmp(name, "delay")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value == 0x7FFFFFFF)
pkt_dev->delay = ULLONG_MAX;
else
@@ -1106,13 +1141,13 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "rate")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (!value)
- return len;
+ 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);
@@ -1121,13 +1156,13 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "ratep")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (!value)
- return len;
+ return -EINVAL;
pkt_dev->delay = NSEC_PER_SEC/value;
if (debug)
pr_info("Delay set at: %llu ns\n", pkt_dev->delay);
@@ -1136,11 +1171,11 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "udp_src_min")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value != pkt_dev->udp_src_min) {
pkt_dev->udp_src_min = value;
pkt_dev->cur_udp_src = value;
@@ -1149,11 +1184,11 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "udp_dst_min")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value != pkt_dev->udp_dst_min) {
pkt_dev->udp_dst_min = value;
pkt_dev->cur_udp_dst = value;
@@ -1162,11 +1197,11 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "udp_src_max")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value != pkt_dev->udp_src_max) {
pkt_dev->udp_src_max = value;
pkt_dev->cur_udp_src = value;
@@ -1175,11 +1210,11 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "udp_dst_max")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value != pkt_dev->udp_dst_max) {
pkt_dev->udp_dst_max = value;
pkt_dev->cur_udp_dst = value;
@@ -1188,7 +1223,8 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "clone_skb")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
/* clone_skb is not supported for netif_receive xmit_mode and
@@ -1197,33 +1233,33 @@ static ssize_t pktgen_if_write(struct file *file,
if ((value > 0) &&
((pkt_dev->xmit_mode == M_NETIF_RECEIVE) ||
!(pkt_dev->odev->priv_flags & IFF_TX_SKB_SHARING)))
- return -ENOTSUPP;
- if (value > 0 && pkt_dev->n_imix_entries > 0)
+ return -EOPNOTSUPP;
+ if (value > 0 && (pkt_dev->n_imix_entries > 0 ||
+ !(pkt_dev->flags & F_SHARED)))
return -EINVAL;
- i += len;
pkt_dev->clone_skb = value;
sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
return count;
}
if (!strcmp(name, "count")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += 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")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (pkt_dev->src_mac_count != value) {
pkt_dev->src_mac_count = value;
pkt_dev->cur_src_mac_offset = 0;
@@ -1233,11 +1269,11 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "dst_mac_count")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (pkt_dev->dst_mac_count != value) {
pkt_dev->dst_mac_count = value;
pkt_dev->cur_dst_mac_offset = 0;
@@ -1247,27 +1283,30 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "burst")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += 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 -ENOTSUPP;
+ 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")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
-
if (node_possible(value)) {
pkt_dev->node = value;
sprintf(pg_result, "OK: node=%d", pkt_dev->node);
@@ -1275,29 +1314,29 @@ static ssize_t pktgen_if_write(struct file *file,
put_page(pkt_dev->page);
pkt_dev->page = NULL;
}
- }
- else
+ } else {
sprintf(pg_result, "ERROR: node not possible");
+ }
return count;
}
if (!strcmp(name, "xmit_mode")) {
char f[32];
- memset(f, 0, 32);
- len = strn_len(&user_buffer[i], sizeof(f) - 1);
+ 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;
- i += len;
if (strcmp(f, "start_xmit") == 0) {
pkt_dev->xmit_mode = M_START_XMIT;
} else if (strcmp(f, "netif_receive") == 0) {
/* clone_skb set earlier, not supported in this mode */
if (pkt_dev->clone_skb > 0)
- return -ENOTSUPP;
+ return -EOPNOTSUPP;
pkt_dev->xmit_mode = M_NETIF_RECEIVE;
@@ -1318,46 +1357,62 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "flag")) {
+ bool disable = false;
__u32 flag;
char f[32];
- bool disable = false;
+ char *end;
- memset(f, 0, 32);
- len = strn_len(&user_buffer[i], sizeof(f) - 1);
+ 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;
- i += len;
flag = pktgen_read_flag(f, &disable);
-
if (flag) {
- if (disable)
+ if (disable) {
+ /* If "clone_skb", or "burst" parameters are
+ * configured, it means that the skb still
+ * needs to be referenced by the pktgen, so
+ * the skb must be shared.
+ */
+ if (flag == F_SHARED && (pkt_dev->clone_skb ||
+ pkt_dev->burst > 1))
+ return -EINVAL;
pkt_dev->flags &= ~flag;
- else
+ } else {
pkt_dev->flags |= flag;
- } else {
- sprintf(pg_result,
- "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
- f,
- "IPSRC_RND, IPDST_RND, UDPSRC_RND, UDPDST_RND, "
- "MACSRC_RND, MACDST_RND, TXSIZE_RND, IPV6, "
- "MPLS_RND, VID_RND, SVID_RND, FLOW_SEQ, "
- "QUEUE_MAP_RND, QUEUE_MAP_CPU, UDPCSUM, "
- "NO_TIMESTAMP, "
-#ifdef CONFIG_XFRM
- "IPSEC, "
-#endif
- "NODE_ALLOC\n");
+ }
+
+ sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
return count;
}
- sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
+
+ /* Unknown flag */
+ 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)) {
+ /* Remove the comma and whitespace at the end */
+ *(pg_result - 2) = '\0';
+ }
+
return count;
}
if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
- len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
+ max = min(sizeof(pkt_dev->dst_min) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1365,19 +1420,19 @@ static ssize_t pktgen_if_write(struct file *file,
return -EFAULT;
buf[len] = 0;
if (strcmp(buf, pkt_dev->dst_min) != 0) {
- memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
- strcpy(pkt_dev->dst_min, buf);
+ 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);
- i += len;
+
sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
return count;
}
if (!strcmp(name, "dst_max")) {
- len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
+ max = min(sizeof(pkt_dev->dst_max) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1385,19 +1440,19 @@ static ssize_t pktgen_if_write(struct file *file,
return -EFAULT;
buf[len] = 0;
if (strcmp(buf, pkt_dev->dst_max) != 0) {
- memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
- strcpy(pkt_dev->dst_max, buf);
+ 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);
- i += len;
+
sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
return count;
}
if (!strcmp(name, "dst6")) {
- len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ max = min(sizeof(buf) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1415,12 +1470,12 @@ static ssize_t pktgen_if_write(struct file *file,
if (debug)
pr_debug("dst6 set to: %s\n", buf);
- i += len;
sprintf(pg_result, "OK: dst6=%s", buf);
return count;
}
if (!strcmp(name, "dst6_min")) {
- len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ max = min(sizeof(buf) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1437,12 +1492,12 @@ static ssize_t pktgen_if_write(struct file *file,
if (debug)
pr_debug("dst6_min set to: %s\n", buf);
- i += len;
sprintf(pg_result, "OK: dst6_min=%s", buf);
return count;
}
if (!strcmp(name, "dst6_max")) {
- len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ max = min(sizeof(buf) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1458,12 +1513,12 @@ static ssize_t pktgen_if_write(struct file *file,
if (debug)
pr_debug("dst6_max set to: %s\n", buf);
- i += len;
sprintf(pg_result, "OK: dst6_max=%s", buf);
return count;
}
if (!strcmp(name, "src6")) {
- len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ max = min(sizeof(buf) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1481,12 +1536,12 @@ static ssize_t pktgen_if_write(struct file *file,
if (debug)
pr_debug("src6 set to: %s\n", buf);
- i += len;
sprintf(pg_result, "OK: src6=%s", buf);
return count;
}
if (!strcmp(name, "src_min")) {
- len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
+ max = min(sizeof(pkt_dev->src_min) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1494,19 +1549,19 @@ static ssize_t pktgen_if_write(struct file *file,
return -EFAULT;
buf[len] = 0;
if (strcmp(buf, pkt_dev->src_min) != 0) {
- memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
- strcpy(pkt_dev->src_min, buf);
+ 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);
- i += len;
+
sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
return count;
}
if (!strcmp(name, "src_max")) {
- len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
+ max = min(sizeof(pkt_dev->src_max) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1514,19 +1569,19 @@ static ssize_t pktgen_if_write(struct file *file,
return -EFAULT;
buf[len] = 0;
if (strcmp(buf, pkt_dev->src_max) != 0) {
- memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
- strcpy(pkt_dev->src_max, buf);
+ 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);
- i += len;
+
sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
return count;
}
if (!strcmp(name, "dst_mac")) {
- len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
+ max = min(sizeof(valstr) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1543,7 +1598,8 @@ static ssize_t pktgen_if_write(struct file *file,
return count;
}
if (!strcmp(name, "src_mac")) {
- len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
+ max = min(sizeof(valstr) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1567,11 +1623,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "flows")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value > MAX_CFLOWS)
value = MAX_CFLOWS;
@@ -1581,44 +1637,44 @@ static ssize_t pktgen_if_write(struct file *file,
}
#ifdef CONFIG_XFRM
if (!strcmp(name, "spi")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
pkt_dev->spi = value;
sprintf(pg_result, "OK: spi=%u", pkt_dev->spi);
return count;
}
#endif
if (!strcmp(name, "flowlen")) {
- len = num_arg(&user_buffer[i], 10, &value);
+ max = min(10, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
pkt_dev->lflow = value;
sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
return count;
}
if (!strcmp(name, "queue_map_min")) {
- len = num_arg(&user_buffer[i], 5, &value);
+ max = min(5, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += 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")) {
- len = num_arg(&user_buffer[i], 5, &value);
+ max = min(5, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
pkt_dev->queue_map_max = value;
sprintf(pg_result, "OK: queue_map_max=%u", pkt_dev->queue_map_max);
return count;
@@ -1627,10 +1683,11 @@ static ssize_t pktgen_if_write(struct file *file,
if (!strcmp(name, "mpls")) {
unsigned int n, cnt;
- len = get_labels(&user_buffer[i], pkt_dev);
+ max = count - i;
+ len = get_labels(&user_buffer[i], max, pkt_dev);
if (len < 0)
return len;
- i += len;
+
cnt = sprintf(pg_result, "OK: mpls=");
for (n = 0; n < pkt_dev->nr_labels; n++)
cnt += sprintf(pg_result + cnt,
@@ -1648,11 +1705,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "vlan_id")) {
- len = num_arg(&user_buffer[i], 4, &value);
+ max = min(4, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if (value <= 4095) {
pkt_dev->vlan_id = value; /* turn on VLAN */
@@ -1675,11 +1732,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "vlan_p")) {
- len = num_arg(&user_buffer[i], 1, &value);
+ max = min(1, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += 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);
@@ -1690,11 +1747,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "vlan_cfi")) {
- len = num_arg(&user_buffer[i], 1, &value);
+ max = min(1, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += 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);
@@ -1705,11 +1762,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "svlan_id")) {
- len = num_arg(&user_buffer[i], 4, &value);
+ max = min(4, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
if ((value <= 4095) && ((pkt_dev->vlan_id != 0xffff))) {
pkt_dev->svlan_id = value; /* turn on SVLAN */
@@ -1732,11 +1789,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "svlan_p")) {
- len = num_arg(&user_buffer[i], 1, &value);
+ max = min(1, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += 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);
@@ -1747,11 +1804,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "svlan_cfi")) {
- len = num_arg(&user_buffer[i], 1, &value);
+ max = min(1, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += 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);
@@ -1762,12 +1819,13 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "tos")) {
- __u32 tmp_value = 0;
- len = hex32_arg(&user_buffer[i], 2, &tmp_value);
+ __u32 tmp_value;
+
+ max = min(2, count - i);
+ len = hex32_arg(&user_buffer[i], max, &tmp_value);
if (len < 0)
return len;
- i += len;
if (len == 2) {
pkt_dev->tos = tmp_value;
sprintf(pg_result, "OK: tos=0x%02x", pkt_dev->tos);
@@ -1778,12 +1836,13 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "traffic_class")) {
- __u32 tmp_value = 0;
- len = hex32_arg(&user_buffer[i], 2, &tmp_value);
+ __u32 tmp_value;
+
+ max = min(2, count - i);
+ len = hex32_arg(&user_buffer[i], max, &tmp_value);
if (len < 0)
return len;
- i += len;
if (len == 2) {
pkt_dev->traffic_class = tmp_value;
sprintf(pg_result, "OK: traffic_class=0x%02x", pkt_dev->traffic_class);
@@ -1794,11 +1853,11 @@ static ssize_t pktgen_if_write(struct file *file,
}
if (!strcmp(name, "skb_priority")) {
- len = num_arg(&user_buffer[i], 9, &value);
+ max = min(9, count - i);
+ len = num_arg(&user_buffer[i], max, &value);
if (len < 0)
return len;
- i += len;
pkt_dev->skb_priority = value;
sprintf(pg_result, "OK: skb_priority=%i",
pkt_dev->skb_priority);
@@ -1853,12 +1912,13 @@ static int pktgen_thread_show(struct seq_file *seq, void *v)
}
static ssize_t pktgen_thread_write(struct file *file,
- const char __user * user_buffer,
- size_t count, loff_t * offset)
+ const char __user *user_buffer,
+ size_t count, loff_t *offset)
{
struct seq_file *seq = file->private_data;
struct pktgen_thread *t = seq->private;
- int i, max, len, ret;
+ size_t i, max;
+ ssize_t len, ret;
char name[40];
char *pg_result;
@@ -1875,8 +1935,8 @@ static ssize_t pktgen_thread_write(struct file *file,
i = len;
/* Read variable name */
-
- len = strn_len(&user_buffer[i], sizeof(name) - 1);
+ max = min(sizeof(name) - 1, count - i);
+ len = strn_len(&user_buffer[i], max);
if (len < 0)
return len;
@@ -1905,15 +1965,17 @@ static ssize_t pktgen_thread_write(struct file *file,
if (!strcmp(name, "add_device")) {
char f[32];
+
memset(f, 0, 32);
- len = strn_len(&user_buffer[i], sizeof(f) - 1);
+ 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;
- i += len;
+
mutex_lock(&pktgen_thread_lock);
ret = pktgen_add_device(t, f);
mutex_unlock(&pktgen_thread_lock);
@@ -2264,7 +2326,7 @@ static void spin(struct pktgen_dev *pkt_dev, ktime_t spin_until)
s64 remaining;
struct hrtimer_sleeper t;
- hrtimer_init_sleeper_on_stack(&t, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ 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));
@@ -2337,24 +2399,25 @@ static inline int f_pick(struct pktgen_dev *pkt_dev)
}
-#ifdef CONFIG_XFRM
/* If there was already an IPSEC SA, we keep it as is, else
* we go look for it ...
-*/
+ */
#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) {
/* We need as quick as possible to find the right SA
- * Searching with minimum criteria to archieve this.
+ * Searching with minimum criteria to achieve, this.
*/
x = xfrm_state_lookup_byspi(pn->net, htonl(pkt_dev->spi), AF_INET);
} else {
- /* slow path: we dont already have xfrm_state */
+ /* slow path: we don't already have xfrm_state */
x = xfrm_stateonly_find(pn->net, DUMMY_MARK, 0,
(xfrm_address_t *)&pkt_dev->cur_daddr,
(xfrm_address_t *)&pkt_dev->cur_saddr,
@@ -2369,16 +2432,16 @@ static void get_ipsec_sa(struct pktgen_dev *pkt_dev, int flow)
}
}
-}
#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);
@@ -2460,6 +2523,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
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 |
@@ -2504,6 +2568,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
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 {
@@ -2524,6 +2589,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
if (imn < imx) {
__u32 t;
__be32 s;
+
if (pkt_dev->flags & F_IPDST_RND) {
do {
@@ -2548,10 +2614,8 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
pkt_dev->flows[flow].flags |= F_INIT;
pkt_dev->flows[flow].cur_daddr =
pkt_dev->cur_daddr;
-#ifdef CONFIG_XFRM
if (pkt_dev->flags & F_IPSEC)
get_ipsec_sa(pkt_dev, flow);
-#endif
pkt_dev->nflows++;
}
}
@@ -2573,6 +2637,7 @@ static void mod_cur_headers(struct pktgen_dev *pkt_dev)
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);
@@ -2639,7 +2704,8 @@ static int pktgen_output_ipsec(struct sk_buff *skb, struct pktgen_dev *pkt_dev)
if (!x)
return 0;
/* XXX: we dont support tunnel mode for now until
- * we resolve the dst issue */
+ * we resolve the dst issue
+ */
if ((x->props.mode != XFRM_MODE_TRANSPORT) && (pkt_dev->spi == 0))
return 0;
@@ -2674,8 +2740,10 @@ static void free_SAs(struct pktgen_dev *pkt_dev)
if (pkt_dev->cflows) {
/* let go of the SAs if we have them */
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;
@@ -2690,6 +2758,7 @@ static int process_ipsec(struct pktgen_dev *pkt_dev,
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;
@@ -2733,6 +2802,7 @@ err:
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;
@@ -2772,8 +2842,7 @@ static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
}
i = 0;
- frag_len = (datalen/frags) < PAGE_SIZE ?
- (datalen/frags) : PAGE_SIZE;
+ frag_len = min_t(int, datalen / frags, PAGE_SIZE);
while (datalen > 0) {
if (unlikely(!pkt_dev->page)) {
int node = numa_node_id();
@@ -2785,14 +2854,16 @@ static void pktgen_finalize_skb(struct pktgen_dev *pkt_dev, struct sk_buff *skb,
break;
}
get_page(pkt_dev->page);
- skb_frag_set_page(skb, i, pkt_dev->page);
- skb_frag_off_set(&skb_shinfo(skb)->frags[i], 0);
+
/*last fragment, fill rest of data*/
if (i == (frags - 1))
- skb_frag_size_set(&skb_shinfo(skb)->frags[i],
- (datalen < PAGE_SIZE ? datalen : PAGE_SIZE));
+ skb_frag_fill_page_desc(&skb_shinfo(skb)->frags[i],
+ pkt_dev->page, 0,
+ min(datalen, PAGE_SIZE));
else
- skb_frag_size_set(&skb_shinfo(skb)->frags[i], frag_len);
+ 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]);
@@ -2842,7 +2913,7 @@ static struct sk_buff *pktgen_alloc_skb(struct net_device *dev,
skb->dev = dev;
}
} else {
- skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
+ skb = __netdev_alloc_skb(dev, size, GFP_NOWAIT);
}
/* the caller pre-fetches from skb->data and reserves for the mac hdr */
@@ -2923,7 +2994,7 @@ static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
skb->priority = pkt_dev->skb_priority;
memcpy(eth, pkt_dev->hh, 12);
- *(__be16 *) & eth[12] = protocol;
+ *(__be16 *)&eth[12] = protocol;
/* Eth + IPh + UDPh + mpls */
datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8 -
@@ -3152,11 +3223,11 @@ static void pktgen_run(struct pktgen_thread *t)
set_pkt_overhead(pkt_dev);
- strcpy(pkt_dev->result, "Starting");
+ strscpy(pkt_dev->result, "Starting");
pkt_dev->running = 1; /* Cranke yeself! */
started++;
} else
- strcpy(pkt_dev->result, "Error starting");
+ strscpy(pkt_dev->result, "Error starting");
}
rcu_read_unlock();
if (started)
@@ -3415,6 +3486,7 @@ static void pktgen_rem_thread(struct pktgen_thread *t)
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));
}
@@ -3437,12 +3509,24 @@ static void pktgen_wait_for_skb(struct pktgen_dev *pkt_dev)
static void pktgen_xmit(struct pktgen_dev *pkt_dev)
{
- unsigned int burst = READ_ONCE(pkt_dev->burst);
+ 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' is false, the read of possible
+ * new values (if any) for 'burst' and 'clone_skb' will be skipped to
+ * prevent some concurrent changes from slipping in. And the stabilized
+ * config will be read in during the next run of pktgen_xmit.
+ */
+ if (skb_shared) {
+ burst = READ_ONCE(pkt_dev->burst);
+ clone_skb = READ_ONCE(pkt_dev->clone_skb);
+ }
+
/* If device is offline, then don't send */
if (unlikely(!netif_running(odev) || !netif_carrier_ok(odev))) {
pktgen_stop_device(pkt_dev);
@@ -3459,7 +3543,7 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
/* If no skb or clone count exhausted then get new one */
if (!pkt_dev->skb || (pkt_dev->last_ok &&
- ++pkt_dev->clone_count >= pkt_dev->clone_skb)) {
+ ++pkt_dev->clone_count >= clone_skb)) {
/* build a new pkt */
kfree_skb(pkt_dev->skb);
@@ -3480,7 +3564,8 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
if (pkt_dev->xmit_mode == M_NETIF_RECEIVE) {
skb = pkt_dev->skb;
skb->protocol = eth_type_trans(skb, skb->dev);
- refcount_add(burst, &skb->users);
+ if (skb_shared)
+ refcount_add(burst, &skb->users);
local_bh_disable();
do {
ret = netif_receive_skb(skb);
@@ -3488,6 +3573,10 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
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) {
/* skb was queued by rps/rfs or taps,
* so cannot reuse this skb
@@ -3506,9 +3595,14 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
goto out; /* Skips xmit_mode M_START_XMIT */
} else if (pkt_dev->xmit_mode == M_QUEUE_XMIT) {
local_bh_disable();
- refcount_inc(&pkt_dev->skb->users);
+ 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++;
@@ -3546,11 +3640,15 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
pkt_dev->last_ok = 0;
goto unlock;
}
- refcount_add(burst, &pkt_dev->skb->users);
+ 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;
@@ -3572,7 +3670,8 @@ xmit_more:
fallthrough;
case NETDEV_TX_BUSY:
/* Retry it next time */
- refcount_dec(&(pkt_dev->skb->users));
+ if (skb_shared)
+ refcount_dec(&pkt_dev->skb->users);
pkt_dev->last_ok = 0;
}
if (unlikely(burst))
@@ -3585,7 +3684,8 @@ out:
/* If pkt_dev->count is zero, then run forever */
if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
- pktgen_wait_for_skb(pkt_dev);
+ if (pkt_dev->skb)
+ pktgen_wait_for_skb(pkt_dev);
/* Done with this */
pktgen_stop_device(pkt_dev);
@@ -3602,7 +3702,7 @@ static int pktgen_thread_worker(void *arg)
struct pktgen_dev *pkt_dev = NULL;
int cpu = t->cpu;
- WARN_ON(smp_processor_id() != cpu);
+ WARN_ON_ONCE(smp_processor_id() != cpu);
init_waitqueue_head(&t->queue);
complete(&t->start_done);
@@ -3617,10 +3717,8 @@ static int pktgen_thread_worker(void *arg)
if (unlikely(!pkt_dev && t->control == 0)) {
if (t->net->pktgen_exiting)
break;
- wait_event_interruptible_timeout(t->queue,
- t->control != 0,
- HZ/10);
- try_to_freeze();
+ wait_event_freezable_timeout(t->queue,
+ t->control != 0, HZ / 10);
continue;
}
@@ -3704,7 +3802,8 @@ static int add_dev_to_thread(struct pktgen_thread *t,
* userspace on another CPU than the kthread. The if_lock()
* is used here to sync with concurrent instances of
* _rem_dev_from_if_list() invoked via kthread, which is also
- * updating the if_list */
+ * updating the if_list
+ */
if_lock(t);
if (pkt_dev->pg_thread) {
@@ -3742,7 +3841,7 @@ static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
if (!pkt_dev)
return -ENOMEM;
- strcpy(pkt_dev->odevname, ifname);
+ strscpy(pkt_dev->odevname, ifname);
pkt_dev->flows = vzalloc_node(array_size(MAX_CFLOWS,
sizeof(struct flow_state)),
node);
@@ -3768,6 +3867,7 @@ static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
pkt_dev->svlan_id = 0xffff;
pkt_dev->burst = 1;
pkt_dev->node = NUMA_NO_NODE;
+ pkt_dev->flags = F_SHARED; /* SKB shared by default */
err = pktgen_setup_dev(t->net, pkt_dev, ifname);
if (err)
@@ -3787,8 +3887,8 @@ static int pktgen_add_device(struct pktgen_thread *t, const char *ifname)
pkt_dev->ipsmode = XFRM_MODE_TRANSPORT;
pkt_dev->ipsproto = IPPROTO_ESP;
- /* xfrm tunnel mode needs additional dst to extract outter
- * ip header protocol/ttl/id field, here creat a phony one.
+ /* xfrm tunnel mode needs additional dst to extract outer
+ * ip header protocol/ttl/id field, here create a phony one.
* instead of looking for a valid rt, which definitely hurting
* performance under such circumstance.
*/
@@ -3832,17 +3932,14 @@ static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
list_add_tail(&t->th_list, &pn->pktgen_threads);
init_completion(&t->start_done);
- p = kthread_create_on_node(pktgen_thread_worker,
- t,
- cpu_to_node(cpu),
- "kpktgend_%d", cpu);
+ 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);
}
- kthread_bind(p, cpu);
+
t->tsk = p;
pe = proc_create_data(t->tsk->comm, 0600, pn->proc_dir,
@@ -3901,7 +3998,8 @@ static int pktgen_remove_device(struct pktgen_thread *t,
/* Remove proc before if_list entry, because add_device uses
* list to determine if interface already exist, avoid race
- * with proc_create_data() */
+ * with proc_create_data()
+ */
proc_remove(pkt_dev->entry);
/* And update the thread if_list */
@@ -3938,6 +4036,7 @@ static int __net_init pg_net_init(struct net *net)
goto remove;
}
+ cpus_read_lock();
for_each_online_cpu(cpu) {
int err;
@@ -3946,6 +4045,7 @@ static int __net_init pg_net_init(struct net *net)
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");
@@ -3979,8 +4079,7 @@ static void __net_exit pg_net_exit(struct net *net)
list_for_each_safe(q, n, &list) {
t = list_entry(q, struct pktgen_thread, th_list);
list_del(&t->th_list);
- kthread_stop(t->tsk);
- put_task_struct(t->tsk);
+ kthread_stop_put(t->tsk);
kfree(t);
}
generated by cgit (git 2.34.1) at 2025-12-21 20:42:19 +0000