netfilter: nf_conntrack: restrict runtime expect hashsize modifications

[safe/jmp/linux-2.6] / kernel / perf_event.c

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 0b0d5f7..40a996e 100644 (file)
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -274,7 +274,12 @@ static void update_event_times(struct perf_event *event)
            event->group_leader->state < PERF_EVENT_STATE_INACTIVE)
                return;
 
-       event->total_time_enabled = ctx->time - event->tstamp_enabled;
+       if (ctx->is_active)
+               run_end = ctx->time;
+       else
+               run_end = event->tstamp_stopped;
+
+       event->total_time_enabled = run_end - event->tstamp_enabled;
 
        if (event->state == PERF_EVENT_STATE_INACTIVE)
                run_end = event->tstamp_stopped;
@@ -333,7 +338,16 @@ list_del_event(struct perf_event *event, struct perf_event_context *ctx)
                event->group_leader->nr_siblings--;
 
        update_event_times(event);
-       event->state = PERF_EVENT_STATE_OFF;
+
+       /*
+        * If event was in error state, then keep it
+        * that way, otherwise bogus counts will be
+        * returned on read(). The only way to get out
+        * of error state is by explicit re-enabling
+        * of the event
+        */
+       if (event->state > PERF_EVENT_STATE_OFF)
+               event->state = PERF_EVENT_STATE_OFF;
 
        /*
         * If this was a group event with sibling events then
@@ -462,7 +476,7 @@ static void perf_event_remove_from_context(struct perf_event *event)
        if (!task) {
                /*
                 * Per cpu events are removed via an smp call and
-                * the removal is always sucessful.
+                * the removal is always successful.
                 */
                smp_call_function_single(event->cpu,
                                         __perf_event_remove_from_context,
@@ -831,7 +845,7 @@ perf_install_in_context(struct perf_event_context *ctx,
        if (!task) {
                /*
                 * Per cpu events are installed via an smp call and
-                * the install is always sucessful.
+                * the install is always successful.
                 */
                smp_call_function_single(cpu, __perf_install_in_context,
                                         event, 1);
@@ -1826,7 +1840,7 @@ static int perf_event_read_group(struct perf_event *event,
 
                size = n * sizeof(u64);
 
-               if (copy_to_user(buf + size, values, size)) {
+               if (copy_to_user(buf + ret, values, size)) {
                        ret = -EFAULT;
                        goto unlock;
                }
@@ -2196,6 +2210,7 @@ static void perf_mmap_data_free(struct perf_mmap_data *data)
        perf_mmap_free_page((unsigned long)data->user_page);
        for (i = 0; i < data->nr_pages; i++)
                perf_mmap_free_page((unsigned long)data->data_pages[i]);
+       kfree(data);
 }
 
 #else
@@ -2236,6 +2251,7 @@ static void perf_mmap_data_free_work(struct work_struct *work)
                perf_mmap_unmark_page(base + (i * PAGE_SIZE));
 
        vfree(base);
+       kfree(data);
 }
 
 static void perf_mmap_data_free(struct perf_mmap_data *data)
@@ -2341,7 +2357,6 @@ static void perf_mmap_data_free_rcu(struct rcu_head *rcu_head)
 
        data = container_of(rcu_head, struct perf_mmap_data, rcu_head);
        perf_mmap_data_free(data);
-       kfree(data);
 }
 
 static void perf_mmap_data_release(struct perf_event *event)
@@ -3826,6 +3841,20 @@ static int perf_swevent_is_counting(struct perf_event *event)
 static int perf_tp_event_match(struct perf_event *event,
                                struct perf_sample_data *data);
 
+static int perf_exclude_event(struct perf_event *event,
+                             struct pt_regs *regs)
+{
+       if (regs) {
+               if (event->attr.exclude_user && user_mode(regs))
+                       return 1;
+
+               if (event->attr.exclude_kernel && !user_mode(regs))
+                       return 1;
+       }
+
+       return 0;
+}
+
 static int perf_swevent_match(struct perf_event *event,
                                enum perf_type_id type,
                                u32 event_id,
@@ -3837,16 +3866,12 @@ static int perf_swevent_match(struct perf_event *event,
 
        if (event->attr.type != type)
                return 0;
+
        if (event->attr.config != event_id)
                return 0;
 
-       if (regs) {
-               if (event->attr.exclude_user && user_mode(regs))
-                       return 0;
-
-               if (event->attr.exclude_kernel && !user_mode(regs))
-                       return 0;
-       }
+       if (perf_exclude_event(event, regs))
+               return 0;
 
        if (event->attr.type == PERF_TYPE_TRACEPOINT &&
            !perf_tp_event_match(event, data))
@@ -3899,7 +3924,7 @@ void perf_swevent_put_recursion_context(int rctx)
 {
        struct perf_cpu_context *cpuctx = &__get_cpu_var(perf_cpu_context);
        barrier();
-       cpuctx->recursion[rctx]++;
+       cpuctx->recursion[rctx]--;
        put_cpu_var(perf_cpu_context);
 }
 EXPORT_SYMBOL_GPL(perf_swevent_put_recursion_context);
@@ -3986,6 +4011,7 @@ static enum hrtimer_restart perf_swevent_hrtimer(struct hrtimer *hrtimer)
        event->pmu->read(event);
 
        data.addr = 0;
+       data.period = event->hw.last_period;
        regs = get_irq_regs();
        /*
         * In case we exclude kernel IPs or are somehow not in interrupt
@@ -4277,15 +4303,17 @@ static const struct pmu *bp_perf_event_init(struct perf_event *bp)
        return &perf_ops_bp;
 }
 
-void perf_bp_event(struct perf_event *bp, void *regs)
+void perf_bp_event(struct perf_event *bp, void *data)
 {
-       /* TODO */
+       struct perf_sample_data sample;
+       struct pt_regs *regs = data;
+
+       sample.addr = bp->attr.bp_addr;
+
+       if (!perf_exclude_event(bp, regs))
+               perf_swevent_add(bp, 1, 1, &sample, regs);
 }
 #else
-static void bp_perf_event_destroy(struct perf_event *event)
-{
-}
-
 static const struct pmu *bp_perf_event_init(struct perf_event *bp)
 {
        return NULL;
@@ -4759,14 +4787,17 @@ perf_event_create_kernel_counter(struct perf_event_attr *attr, int cpu,
         */
 
        ctx = find_get_context(pid, cpu);
-       if (IS_ERR(ctx))
-               return NULL;
+       if (IS_ERR(ctx)) {
+               err = PTR_ERR(ctx);
+               goto err_exit;
+       }
 
        event = perf_event_alloc(attr, cpu, ctx, NULL,
                                     NULL, callback, GFP_KERNEL);
-       err = PTR_ERR(event);
-       if (IS_ERR(event))
+       if (IS_ERR(event)) {
+               err = PTR_ERR(event);
                goto err_put_context;
+       }
 
        event->filp = NULL;
        WARN_ON_ONCE(ctx->parent_ctx);
@@ -4783,11 +4814,10 @@ perf_event_create_kernel_counter(struct perf_event_attr *attr, int cpu,
 
        return event;
 
-err_put_context:
-       if (err < 0)
-               put_ctx(ctx);
-
-       return NULL;
+ err_put_context:
+       put_ctx(ctx);
+ err_exit:
+       return ERR_PTR(err);
 }
 EXPORT_SYMBOL_GPL(perf_event_create_kernel_counter);