+++ /dev/null
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2012, 2013, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/lvfs/lvfs_lib.c
- *
- * Lustre filesystem abstraction routines
- *
- * Author: Andreas Dilger <adilger@clusterfs.com>
- */
-#ifdef __KERNEL__
-#include <linux/module.h>
-#else
-#include <liblustre.h>
-#endif
-#include <lustre_lib.h>
-#include <lprocfs_status.h>
-
-#ifdef LPROCFS
-void lprocfs_counter_add(struct lprocfs_stats *stats, int idx, long amount)
-{
- struct lprocfs_counter *percpu_cntr;
- struct lprocfs_counter_header *header;
- int smp_id;
- unsigned long flags = 0;
-
- if (stats == NULL)
- return;
-
- LASSERTF(0 <= idx && idx < stats->ls_num,
- "idx %d, ls_num %hu\n", idx, stats->ls_num);
-
- /* With per-client stats, statistics are allocated only for
- * single CPU area, so the smp_id should be 0 always. */
- smp_id = lprocfs_stats_lock(stats, LPROCFS_GET_SMP_ID, &flags);
- if (smp_id < 0)
- return;
-
- header = &stats->ls_cnt_header[idx];
- percpu_cntr = lprocfs_stats_counter_get(stats, smp_id, idx);
- percpu_cntr->lc_count++;
-
- if (header->lc_config & LPROCFS_CNTR_AVGMINMAX) {
- /*
- * lprocfs_counter_add() can be called in interrupt context,
- * as memory allocation could trigger memory shrinker call
- * ldlm_pool_shrink(), which calls lprocfs_counter_add().
- * LU-1727.
- *
- * Only obd_memory uses LPROCFS_STATS_FLAG_IRQ_SAFE
- * flag, because it needs accurate counting lest memory leak
- * check reports error.
- */
- if (in_interrupt() &&
- (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
- percpu_cntr->lc_sum_irq += amount;
- else
- percpu_cntr->lc_sum += amount;
-
- if (header->lc_config & LPROCFS_CNTR_STDDEV)
- percpu_cntr->lc_sumsquare += (__s64)amount * amount;
- if (amount < percpu_cntr->lc_min)
- percpu_cntr->lc_min = amount;
- if (amount > percpu_cntr->lc_max)
- percpu_cntr->lc_max = amount;
- }
- lprocfs_stats_unlock(stats, LPROCFS_GET_SMP_ID, &flags);
-}
-EXPORT_SYMBOL(lprocfs_counter_add);
-
-void lprocfs_counter_sub(struct lprocfs_stats *stats, int idx, long amount)
-{
- struct lprocfs_counter *percpu_cntr;
- struct lprocfs_counter_header *header;
- int smp_id;
- unsigned long flags = 0;
-
- if (stats == NULL)
- return;
-
- LASSERTF(0 <= idx && idx < stats->ls_num,
- "idx %d, ls_num %hu\n", idx, stats->ls_num);
-
- /* With per-client stats, statistics are allocated only for
- * single CPU area, so the smp_id should be 0 always. */
- smp_id = lprocfs_stats_lock(stats, LPROCFS_GET_SMP_ID, &flags);
- if (smp_id < 0)
- return;
-
- header = &stats->ls_cnt_header[idx];
- percpu_cntr = lprocfs_stats_counter_get(stats, smp_id, idx);
- if (header->lc_config & LPROCFS_CNTR_AVGMINMAX) {
- /*
- * Sometimes we use RCU callbacks to free memory which calls
- * lprocfs_counter_sub(), and RCU callbacks may execute in
- * softirq context - right now that's the only case we're in
- * softirq context here, use separate counter for that.
- * bz20650.
- *
- * Only obd_memory uses LPROCFS_STATS_FLAG_IRQ_SAFE
- * flag, because it needs accurate counting lest memory leak
- * check reports error.
- */
- if (in_interrupt() &&
- (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) != 0)
- percpu_cntr->lc_sum_irq -= amount;
- else
- percpu_cntr->lc_sum -= amount;
- }
- lprocfs_stats_unlock(stats, LPROCFS_GET_SMP_ID, &flags);
-}
-EXPORT_SYMBOL(lprocfs_counter_sub);
-
-int lprocfs_stats_alloc_one(struct lprocfs_stats *stats, unsigned int cpuid)
-{
- struct lprocfs_counter *cntr;
- unsigned int percpusize;
- int rc = -ENOMEM;
- unsigned long flags = 0;
- int i;
-
- LASSERT(stats->ls_percpu[cpuid] == NULL);
- LASSERT((stats->ls_flags & LPROCFS_STATS_FLAG_NOPERCPU) == 0);
-
- percpusize = lprocfs_stats_counter_size(stats);
- LIBCFS_ALLOC_ATOMIC(stats->ls_percpu[cpuid], percpusize);
- if (stats->ls_percpu[cpuid] != NULL) {
- rc = 0;
- if (unlikely(stats->ls_biggest_alloc_num <= cpuid)) {
- if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE)
- spin_lock_irqsave(&stats->ls_lock, flags);
- else
- spin_lock(&stats->ls_lock);
- if (stats->ls_biggest_alloc_num <= cpuid)
- stats->ls_biggest_alloc_num = cpuid + 1;
- if (stats->ls_flags & LPROCFS_STATS_FLAG_IRQ_SAFE) {
- spin_unlock_irqrestore(&stats->ls_lock, flags);
- } else {
- spin_unlock(&stats->ls_lock);
- }
- }
- /* initialize the ls_percpu[cpuid] non-zero counter */
- for (i = 0; i < stats->ls_num; ++i) {
- cntr = lprocfs_stats_counter_get(stats, cpuid, i);
- cntr->lc_min = LC_MIN_INIT;
- }
- }
-
- return rc;
-}
-EXPORT_SYMBOL(lprocfs_stats_alloc_one);
-#endif /* LPROCFS */