diff options
| -rw-r--r-- | net/core/pktgen.c | 135 |
1 files changed, 110 insertions, 25 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c index da16f8fd1494..6586321b0187 100644 --- a/net/core/pktgen.c +++ b/net/core/pktgen.c @@ -153,7 +153,7 @@ #include <asm/timex.h> -#define VERSION "pktgen v2.63: Packet Generator for packet performance testing.\n" +#define VERSION "pktgen v2.64: Packet Generator for packet performance testing.\n" /* #define PG_DEBUG(a) a */ #define PG_DEBUG(a) @@ -176,7 +176,8 @@ #define T_TERMINATE (1<<0) #define T_STOP (1<<1) /* Stop run */ #define T_RUN (1<<2) /* Start run */ -#define T_REMDEV (1<<3) /* Remove all devs */ +#define T_REMDEVALL (1<<3) /* Remove all devs */ +#define T_REMDEV (1<<4) /* Remove one dev */ /* Locks */ #define thread_lock() down(&pktgen_sem) @@ -218,6 +219,8 @@ struct pktgen_dev { * we will do a random selection from within the range. */ __u32 flags; + int removal_mark; /* non-zero => the device is marked for + * removal by worker thread */ int min_pkt_size; /* = ETH_ZLEN; */ int max_pkt_size; /* = ETH_ZLEN; */ @@ -481,7 +484,7 @@ static void pktgen_stop_all_threads_ifs(void); static int pktgen_stop_device(struct pktgen_dev *pkt_dev); static void pktgen_stop(struct pktgen_thread* t); static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); -static struct pktgen_dev *pktgen_NN_threads(const char* dev_name, int remove); +static int pktgen_mark_device(const char* ifname); static unsigned int scan_ip6(const char *s,char ip[16]); static unsigned int fmt_ip6(char *s,const char ip[16]); @@ -1406,7 +1409,7 @@ static ssize_t pktgen_thread_write(struct file *file, if (!strcmp(name, "rem_device_all")) { thread_lock(); - t->control |= T_REMDEV; + t->control |= T_REMDEVALL; thread_unlock(); schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */ ret = count; @@ -1457,7 +1460,8 @@ static struct pktgen_dev *__pktgen_NN_threads(const char* ifname, int remove) if (pkt_dev) { if(remove) { if_lock(t); - pktgen_remove_device(t, pkt_dev); + pkt_dev->removal_mark = 1; + t->control |= T_REMDEV; if_unlock(t); } break; @@ -1467,13 +1471,44 @@ static struct pktgen_dev *__pktgen_NN_threads(const char* ifname, int remove) return pkt_dev; } -static struct pktgen_dev *pktgen_NN_threads(const char* ifname, int remove) +/* + * mark a device for removal + */ +static int pktgen_mark_device(const char* ifname) { struct pktgen_dev *pkt_dev = NULL; + const int max_tries = 10, msec_per_try = 125; + int i = 0; + int ret = 0; + thread_lock(); - pkt_dev = __pktgen_NN_threads(ifname, remove); - thread_unlock(); - return pkt_dev; + PG_DEBUG(printk("pktgen: pktgen_mark_device marking %s for removal\n", + ifname)); + + while(1) { + + pkt_dev = __pktgen_NN_threads(ifname, REMOVE); + if (pkt_dev == NULL) break; /* success */ + + thread_unlock(); + PG_DEBUG(printk("pktgen: pktgen_mark_device waiting for %s " + "to disappear....\n", ifname)); + schedule_timeout_interruptible(msecs_to_jiffies(msec_per_try)); + thread_lock(); + + if (++i >= max_tries) { + printk("pktgen_mark_device: timed out after waiting " + "%d msec for device %s to be removed\n", + msec_per_try*i, ifname); + ret = 1; + break; + } + + } + + thread_unlock(); + + return ret; } static int pktgen_device_event(struct notifier_block *unused, unsigned long event, void *ptr) @@ -1493,7 +1528,7 @@ static int pktgen_device_event(struct notifier_block *unused, unsigned long even break; case NETDEV_UNREGISTER: - pktgen_NN_threads(dev->name, REMOVE); + pktgen_mark_device(dev->name); break; }; @@ -2303,11 +2338,11 @@ static void pktgen_stop_all_threads_ifs(void) { struct pktgen_thread *t = pktgen_threads; - PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n")); + PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads_ifs.\n")); thread_lock(); while(t) { - pktgen_stop(t); + t->control |= T_STOP; t = t->next; } thread_unlock(); @@ -2431,7 +2466,9 @@ static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) 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) { printk("pktgen: interface: %s is already stopped\n", pkt_dev->ifname); return -EINVAL; @@ -2440,13 +2477,8 @@ static int pktgen_stop_device(struct pktgen_dev *pkt_dev) pkt_dev->stopped_at = getCurUs(); pkt_dev->running = 0; - show_results(pkt_dev, skb_shinfo(pkt_dev->skb)->nr_frags); - - if (pkt_dev->skb) - kfree_skb(pkt_dev->skb); + show_results(pkt_dev, nr_frags); - pkt_dev->skb = NULL; - return 0; } @@ -2469,26 +2501,66 @@ static struct pktgen_dev *next_to_run(struct pktgen_thread *t ) static void pktgen_stop(struct pktgen_thread *t) { struct pktgen_dev *next = NULL; - PG_DEBUG(printk("pktgen: entering pktgen_stop.\n")); + PG_DEBUG(printk("pktgen: entering pktgen_stop\n")); if_lock(t); - for(next=t->if_list; next; next=next->next) + for(next=t->if_list; next; next=next->next) { pktgen_stop_device(next); + if (next->skb) + kfree_skb(next->skb); + + next->skb = NULL; + } if_unlock(t); } +/* + * one of our devices needs to be removed - find it + * and remove it + */ +static void pktgen_rem_one_if(struct pktgen_thread *t) +{ + struct pktgen_dev *cur, *next = NULL; + + PG_DEBUG(printk("pktgen: entering pktgen_rem_one_if\n")); + + if_lock(t); + + for(cur=t->if_list; cur; cur=next) { + next = cur->next; + + if (!cur->removal_mark) continue; + + if (cur->skb) + kfree_skb(cur->skb); + cur->skb = NULL; + + pktgen_remove_device(t, cur); + + break; + } + + if_unlock(t); +} + static void pktgen_rem_all_ifs(struct pktgen_thread *t) { struct pktgen_dev *cur, *next = NULL; - - /* Remove all devices, free mem */ + /* Remove all devices, free mem */ + + PG_DEBUG(printk("pktgen: entering pktgen_rem_all_ifs\n")); if_lock(t); for(cur=t->if_list; cur; cur=next) { next = cur->next; + + if (cur->skb) + kfree_skb(cur->skb); + cur->skb = NULL; + pktgen_remove_device(t, cur); } @@ -2550,6 +2622,9 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) if (!netif_running(odev)) { pktgen_stop_device(pkt_dev); + if (pkt_dev->skb) + kfree_skb(pkt_dev->skb); + pkt_dev->skb = NULL; goto out; } if (need_resched()) @@ -2581,7 +2656,7 @@ static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) pkt_dev->clone_count = 0; /* reset counter */ } } - + spin_lock_bh(&odev->xmit_lock); if (!netif_queue_stopped(odev)) { @@ -2644,6 +2719,9 @@ retry_now: /* Done with this */ pktgen_stop_device(pkt_dev); + if (pkt_dev->skb) + kfree_skb(pkt_dev->skb); + pkt_dev->skb = NULL; } out:; } @@ -2685,6 +2763,7 @@ static void pktgen_thread_worker(struct pktgen_thread *t) t->control &= ~(T_TERMINATE); t->control &= ~(T_RUN); t->control &= ~(T_STOP); + t->control &= ~(T_REMDEVALL); t->control &= ~(T_REMDEV); t->pid = current->pid; @@ -2748,8 +2827,13 @@ static void pktgen_thread_worker(struct pktgen_thread *t) t->control &= ~(T_RUN); } - if(t->control & T_REMDEV) { + 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); } @@ -2833,6 +2917,7 @@ static int pktgen_add_device(struct pktgen_thread *t, const char* ifname) } memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state)); + pkt_dev->removal_mark = 0; pkt_dev->min_pkt_size = ETH_ZLEN; pkt_dev->max_pkt_size = ETH_ZLEN; pkt_dev->nfrags = 0; |