| /* |
| ************************************************************************** |
| * Copyright (c) 2016-2020, 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. |
| ************************************************************************** |
| */ |
| |
| #include "nss_core.h" |
| #include "nss_pptp_stats.h" |
| #include "nss_pptp_strings.h" |
| |
| /* |
| * Declare atomic notifier data structure for statistics. |
| */ |
| ATOMIC_NOTIFIER_HEAD(nss_pptp_stats_notifier); |
| |
| struct nss_pptp_stats_session_debug pptp_session_stats[NSS_MAX_PPTP_DYNAMIC_INTERFACES]; |
| |
| /* |
| * nss_pptp_stats_read() |
| * Read pptp statistics |
| */ |
| static ssize_t nss_pptp_stats_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos) |
| { |
| |
| uint32_t max_output_lines = 2 /* header & footer for session stats */ |
| + NSS_MAX_PPTP_DYNAMIC_INTERFACES * (NSS_PPTP_STATS_SESSION_MAX + 2) /*session stats */ |
| + 2; |
| size_t size_al = NSS_STATS_MAX_STR_LENGTH * max_output_lines ; |
| size_t size_wr = 0; |
| ssize_t bytes_read = 0; |
| struct net_device *dev; |
| int id, i; |
| |
| char *lbuf = kzalloc(size_al, GFP_KERNEL); |
| if (unlikely(lbuf == NULL)) { |
| nss_warning("Could not allocate memory for local statistics buffer"); |
| return 0; |
| } |
| |
| memset(&pptp_session_stats, 0, sizeof(struct nss_pptp_stats_session_debug) * NSS_MAX_PPTP_DYNAMIC_INTERFACES); |
| |
| /* |
| * Get all stats |
| */ |
| nss_pptp_session_debug_stats_get((void *)&pptp_session_stats); |
| |
| /* |
| * Session stats |
| */ |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "\npptp session stats start:\n\n"); |
| for (id = 0; id < NSS_MAX_PPTP_DYNAMIC_INTERFACES; id++) { |
| |
| if (!pptp_session_stats[id].valid) { |
| break; |
| } |
| |
| dev = dev_get_by_index(&init_net, pptp_session_stats[id].if_index); |
| if (likely(dev)) { |
| |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "%d. nss interface id=%d, netdevice=%s\n", id, |
| pptp_session_stats[id].if_num, dev->name); |
| dev_put(dev); |
| } else { |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "%d. nss interface id=%d\n", id, |
| pptp_session_stats[id].if_num); |
| } |
| |
| for (i = 0; i < NSS_PPTP_STATS_SESSION_MAX; i++) { |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, |
| "\t%s = %llu\n", nss_pptp_strings_session_debug_stats[i].stats_name, |
| pptp_session_stats[id].stats[i]); |
| } |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "\n"); |
| } |
| |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "\npptp session stats end\n"); |
| bytes_read = simple_read_from_buffer(ubuf, sz, ppos, lbuf, size_wr); |
| |
| kfree(lbuf); |
| return bytes_read; |
| } |
| |
| /* |
| * nss_pptp_stats_ops |
| */ |
| NSS_STATS_DECLARE_FILE_OPERATIONS(pptp); |
| |
| /* |
| * nss_pptp_stats_dentry_create() |
| * Create PPTP node statistics debug entry. |
| */ |
| void nss_pptp_stats_dentry_create(void) |
| { |
| nss_stats_create_dentry("pptp", &nss_pptp_stats_ops); |
| } |
| |
| /* |
| * nss_pptp_stats_notify() |
| * Sends notifications to the registered modules. |
| * |
| * Leverage NSS-FW statistics timing to update Netlink. |
| */ |
| void nss_pptp_stats_notify(struct nss_ctx_instance *nss_ctx, uint32_t if_num) |
| { |
| struct nss_pptp_stats_notification pptp_stats; |
| int id; |
| |
| memset(&pptp_session_stats, 0, sizeof(pptp_session_stats)); |
| |
| /* |
| * Get all stats |
| */ |
| nss_pptp_session_debug_stats_get((void *)&pptp_session_stats); |
| |
| for (id = 0; id < NSS_MAX_PPTP_DYNAMIC_INTERFACES; id++) { |
| if (pptp_session_stats[id].if_num == if_num) { |
| memcpy(&pptp_stats.stats, &pptp_session_stats[id].stats, sizeof(pptp_stats.stats)); |
| } |
| } |
| pptp_stats.if_type = nss_dynamic_interface_get_type(nss_ctx, if_num); |
| pptp_stats.core_id = nss_ctx->id; |
| pptp_stats.if_num = if_num; |
| atomic_notifier_call_chain(&nss_pptp_stats_notifier, NSS_STATS_EVENT_NOTIFY, (void *)&pptp_stats); |
| } |
| |
| /* |
| * nss_pptp_stats_register_notifier() |
| * Registers statistics notifier. |
| */ |
| int nss_pptp_stats_register_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_register(&nss_pptp_stats_notifier, nb); |
| } |
| EXPORT_SYMBOL(nss_pptp_stats_register_notifier); |
| |
| /* |
| * nss_pptp_stats_unregister_notifier() |
| * Deregisters statistics notifier. |
| */ |
| int nss_pptp_stats_unregister_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_unregister(&nss_pptp_stats_notifier, nb); |
| } |
| EXPORT_SYMBOL(nss_pptp_stats_unregister_notifier); |