| /* |
| *************************************************************************** |
| * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| *************************************************************************** |
| */ |
| |
| /* |
| * nss_match_stats.c |
| */ |
| #include "nss_core.h" |
| #include "nss_stats.h" |
| #include <nss_match.h> |
| #include "nss_match_stats.h" |
| #include "nss_match_strings.h" |
| |
| #define NSS_MATCH_STATS_SIZE_PER_IF (NSS_STATS_MAX_STR_LENGTH * NSS_STATS_NODE_MAX) |
| /* Total number of statistics per match interface. */ |
| |
| int match_ifnum[NSS_MATCH_INSTANCE_MAX] = {0}; |
| uint64_t nss_match_stats[NSS_MATCH_INSTANCE_MAX][NSS_MATCH_STATS_MAX]; |
| static DEFINE_SPINLOCK(nss_match_stats_lock); |
| |
| /* |
| * Declare atomic notifier data structure for statistics. |
| */ |
| ATOMIC_NOTIFIER_HEAD(nss_match_stats_notifier); |
| |
| /* |
| * nss_match_stats_read() |
| * Read match node statiistics. |
| */ |
| static ssize_t nss_match_stats_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos) |
| { |
| /* |
| * Max output lines = #stats + |
| * few blank lines for banner printing + Number of Extra outputlines |
| * for future reference to add new stats |
| */ |
| uint32_t max_output_lines = NSS_MATCH_STATS_MAX + NSS_STATS_EXTRA_OUTPUT_LINES; |
| size_t size_al = NSS_STATS_MAX_STR_LENGTH * max_output_lines * NSS_MATCH_INSTANCE_MAX; |
| ssize_t bytes_read = 0; |
| size_t size_wr = 0; |
| uint32_t if_num; |
| int index; |
| |
| char *lbuf = kzalloc(size_al, GFP_KERNEL); |
| if (unlikely(!lbuf)) { |
| nss_warning("Could not allocate memory for local statistics buffer"); |
| return 0; |
| } |
| |
| size_wr += nss_stats_banner(lbuf, size_wr, size_al, "match stats", NSS_STATS_SINGLE_CORE); |
| |
| /* |
| * Common node stats for each match dynamic interface. |
| */ |
| for (index = 0; index < NSS_MATCH_INSTANCE_MAX; index++) { |
| |
| spin_lock_bh(&nss_match_stats_lock); |
| if_num = match_ifnum[index]; |
| spin_unlock_bh(&nss_match_stats_lock); |
| |
| if (if_num) { |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "\nMatch node if_num:%03u", if_num); |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "\n ---------------------- \n"); |
| size_wr += nss_stats_print("match", NULL, NSS_STATS_SINGLE_INSTANCE, nss_match_strings_stats, |
| nss_match_stats[index], NSS_MATCH_STATS_MAX, lbuf, size_wr, size_al); |
| continue; |
| } |
| } |
| |
| bytes_read = simple_read_from_buffer(ubuf, sz, ppos, lbuf, strlen(lbuf)); |
| kfree(lbuf); |
| return bytes_read; |
| } |
| |
| |
| /* |
| * nss_match_stats_sync() |
| * Update match common node statistics. |
| */ |
| void nss_match_stats_sync(struct nss_ctx_instance *nss_ctx, struct nss_match_msg *nmm) |
| { |
| struct nss_match_stats_sync *ndccs = &nmm->msg.stats; |
| uint64_t *ctx_stats; |
| uint32_t *msg_stats; |
| uint32_t if_num; |
| uint16_t i = 0; |
| int index; |
| |
| for (index = 0; index < NSS_MATCH_INSTANCE_MAX; index++) { |
| spin_lock_bh(&nss_match_stats_lock); |
| if_num = match_ifnum[index]; |
| spin_unlock_bh(&nss_match_stats_lock); |
| |
| if (if_num == nmm->cm.interface) { |
| break; |
| } |
| } |
| |
| if (index == NSS_MATCH_INSTANCE_MAX) { |
| nss_warning("Invalid Match index\n"); |
| return; |
| } |
| |
| spin_lock_bh(&nss_match_stats_lock); |
| msg_stats = (uint32_t *)ndccs; |
| ctx_stats = nss_match_stats[index]; |
| |
| for (i = 0; i < NSS_MATCH_STATS_MAX; i++, ctx_stats++, msg_stats++) { |
| *ctx_stats += *msg_stats; |
| } |
| |
| spin_unlock_bh(&nss_match_stats_lock); |
| } |
| |
| /* |
| * nss_match_stats_ops |
| */ |
| NSS_STATS_DECLARE_FILE_OPERATIONS(match) |
| |
| /* |
| * nss_match_ifnum_add() |
| * Add match node interface ID. |
| */ |
| bool nss_match_ifnum_add(int if_num) |
| { |
| int index = 0; |
| |
| spin_lock_bh(&nss_match_stats_lock); |
| |
| for (index = 0; index < NSS_MATCH_INSTANCE_MAX; index++) { |
| if (match_ifnum[index]) { |
| continue; |
| } |
| |
| match_ifnum[index] = if_num; |
| |
| spin_unlock_bh(&nss_match_stats_lock); |
| return true; |
| } |
| |
| spin_unlock_bh(&nss_match_stats_lock); |
| return false; |
| } |
| |
| /* |
| * nss_match_ifnum_delete() |
| * Delete match node interface ID. |
| */ |
| bool nss_match_ifnum_delete(int if_num) |
| { |
| int index = 0; |
| |
| spin_lock_bh(&nss_match_stats_lock); |
| |
| for (index = 0; index < NSS_MATCH_INSTANCE_MAX; index++) { |
| if (match_ifnum[index] != if_num) { |
| continue; |
| } |
| |
| match_ifnum[index] = 0; |
| |
| spin_unlock_bh(&nss_match_stats_lock); |
| return true; |
| } |
| |
| spin_unlock_bh(&nss_match_stats_lock); |
| return false; |
| } |
| |
| /* |
| * nss_match_stats_notify() |
| * Sends notifications to all the registered modules. |
| * |
| * Leverage NSS-FW statistics timing to update Netlink. |
| */ |
| void nss_match_stats_notify(struct nss_ctx_instance *nss_ctx, uint32_t if_num) |
| { |
| struct nss_match_stats_notification match_stats; |
| uint32_t interface; |
| int index; |
| |
| match_stats.core_id = nss_ctx->id; |
| match_stats.if_num = if_num; |
| |
| for (index = 0; index < NSS_MATCH_INSTANCE_MAX; index++) { |
| spin_lock_bh(&nss_match_stats_lock); |
| interface = match_ifnum[index]; |
| spin_unlock_bh(&nss_match_stats_lock); |
| |
| if (interface == if_num) { |
| break; |
| } |
| } |
| |
| if (index == NSS_MATCH_INSTANCE_MAX) { |
| nss_warning("Invalid Match index\n"); |
| return; |
| } |
| |
| spin_lock_bh(&nss_match_stats_lock); |
| memcpy(match_stats.stats_ctx, nss_match_stats[index], sizeof(match_stats.stats_ctx)); |
| spin_unlock_bh(&nss_match_stats_lock); |
| atomic_notifier_call_chain(&nss_match_stats_notifier, NSS_STATS_EVENT_NOTIFY, &match_stats); |
| } |
| |
| /* |
| * nss_match_stats_unregister_notifier() |
| * Deregisters statistics notifier. |
| */ |
| int nss_match_stats_unregister_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_unregister(&nss_match_stats_notifier, nb); |
| } |
| |
| /* |
| * nss_match_stats_register_notifier() |
| * Registers statistics notifier. |
| */ |
| int nss_match_stats_register_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_register(&nss_match_stats_notifier, nb); |
| } |
| |
| /* |
| * nss_match_stats_dentry_create() |
| * Create match statistics debug entry. |
| */ |
| void nss_match_stats_dentry_create(void) |
| { |
| nss_stats_create_dentry("match", &nss_match_stats_ops); |
| } |