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pktgen: add full reset functionality
While testing pktgen, I found that sometimes my configurations from previous runs would be left over, particularly when going from a test with 8 threads down to a test with 4 threads. This adds new functionality to pktgen where you can call pgset "reset" and it will be just like you just insmod'ed pktgen again. Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Robert Olsson <robert.olsson@its.uu.se> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -422,6 +422,7 @@ static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t,
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const char *ifname);
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static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
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static void pktgen_run_all_threads(void);
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static void pktgen_reset_all_threads(void);
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static void pktgen_stop_all_threads_ifs(void);
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static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
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static void pktgen_stop(struct pktgen_thread *t);
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@ -480,6 +481,9 @@ static ssize_t pgctrl_write(struct file *file, const char __user * buf,
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else if (!strcmp(data, "start"))
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pktgen_run_all_threads();
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else if (!strcmp(data, "reset"))
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pktgen_reset_all_threads();
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else
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printk(KERN_WARNING "pktgen: Unknown command: %s\n", data);
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@ -3173,6 +3177,24 @@ static void pktgen_run_all_threads(void)
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pktgen_wait_all_threads_run();
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}
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static void pktgen_reset_all_threads(void)
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{
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struct pktgen_thread *t;
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pr_debug("pktgen: entering pktgen_reset_all_threads.\n");
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mutex_lock(&pktgen_thread_lock);
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list_for_each_entry(t, &pktgen_threads, th_list)
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t->control |= (T_REMDEVALL);
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mutex_unlock(&pktgen_thread_lock);
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schedule_timeout_interruptible(msecs_to_jiffies(125)); /* Propagate thread->control */
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pktgen_wait_all_threads_run();
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}
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static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
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{
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__u64 total_us, bps, mbps, pps, idle;
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