| /* |
| *************************************************************************** |
| * 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. |
| *************************************************************************** |
| */ |
| |
| #include "nss_core.h" |
| #include "nss_dtls_cmn.h" |
| #include "nss_dtls_cmn_stats.h" |
| #include "nss_dtls_cmn_strings.h" |
| |
| /* |
| * Declare atomic notifier data structure for statistics. |
| */ |
| ATOMIC_NOTIFIER_HEAD(nss_dtls_cmn_stats_notifier); |
| |
| /* |
| * Spinlock to protect dtls common statistics update/read |
| */ |
| DEFINE_SPINLOCK(nss_dtls_cmn_stats_lock); |
| |
| unsigned long *nss_dtls_cmn_ifmap_get(void); |
| |
| /* |
| * nss_dtls_cmn_ctx_stats |
| * dtls common ctx statistics |
| */ |
| uint64_t nss_dtls_cmn_ctx_stats[NSS_MAX_NET_INTERFACES][NSS_DTLS_CMN_CTX_STATS_MAX]; |
| |
| /* |
| * nss_dtls_cmn_stats_iface_type() |
| * Return a string for each interface type. |
| */ |
| static const char *nss_dtls_cmn_stats_iface_type(enum nss_dynamic_interface_type type) |
| { |
| switch (type) { |
| case NSS_DYNAMIC_INTERFACE_TYPE_DTLS_CMN_INNER: |
| return "dtls_cmn_inner"; |
| |
| case NSS_DYNAMIC_INTERFACE_TYPE_DTLS_CMN_OUTER: |
| return "dtls_cmn_outer"; |
| |
| default: |
| return "invalid_interface"; |
| |
| } |
| } |
| |
| /* |
| * nss_dtls_cmn_stats_read() |
| * Read dtls common node statistics. |
| */ |
| static ssize_t nss_dtls_cmn_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_DTLS_CMN_CTX_STATS_MAX + NSS_STATS_EXTRA_OUTPUT_LINES; |
| size_t size_al = NSS_STATS_MAX_STR_LENGTH * max_output_lines; |
| struct nss_ctx_instance *nss_ctx = nss_dtls_cmn_get_context(); |
| enum nss_dynamic_interface_type type; |
| unsigned long *ifmap; |
| uint64_t *stats_shadow; |
| ssize_t bytes_read = 0; |
| size_t size_wr = 0; |
| uint32_t if_num; |
| int32_t i; |
| int count; |
| char *lbuf; |
| |
| ifmap = nss_dtls_cmn_ifmap_get(); |
| count = bitmap_weight(ifmap, NSS_MAX_NET_INTERFACES); |
| if (count) { |
| size_al = size_al * count; |
| } |
| |
| lbuf = vzalloc(size_al); |
| if (unlikely(!lbuf)) { |
| nss_warning("Could not allocate memory for local statistics buffer"); |
| return -ENOMEM; |
| } |
| |
| stats_shadow = vzalloc(NSS_DTLS_CMN_CTX_STATS_MAX * 8); |
| if (unlikely(!stats_shadow)) { |
| nss_warning("Could not allocate memory for local shadow buffer"); |
| vfree(lbuf); |
| return -ENOMEM; |
| } |
| |
| /* |
| * Common node stats for each DTLS dynamic interface. |
| */ |
| size_wr += nss_stats_banner(lbuf, size_wr, size_al, "dtls_cmn stats", NSS_STATS_SINGLE_CORE); |
| for_each_set_bit(if_num, ifmap, NSS_MAX_NET_INTERFACES) { |
| |
| type = nss_dynamic_interface_get_type(nss_ctx, if_num); |
| if ((type != NSS_DYNAMIC_INTERFACE_TYPE_DTLS_CMN_INNER) && |
| (type != NSS_DYNAMIC_INTERFACE_TYPE_DTLS_CMN_OUTER)) { |
| continue; |
| } |
| |
| spin_lock_bh(&nss_dtls_cmn_stats_lock); |
| for (i = 0; i < NSS_DTLS_CMN_CTX_STATS_MAX; i++) { |
| stats_shadow[i] = nss_dtls_cmn_ctx_stats[if_num][i]; |
| } |
| spin_unlock_bh(&nss_dtls_cmn_stats_lock); |
| |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "\n%s if_num:%03u\n", |
| nss_dtls_cmn_stats_iface_type(type), if_num); |
| size_wr += nss_stats_print("dtls_cmn", NULL, NSS_STATS_SINGLE_INSTANCE, nss_dtls_cmn_ctx_stats_str, |
| stats_shadow, NSS_DTLS_CMN_CTX_STATS_MAX, lbuf, size_wr, size_al); |
| } |
| |
| bytes_read = simple_read_from_buffer(ubuf, sz, ppos, lbuf, strlen(lbuf)); |
| vfree(lbuf); |
| vfree(stats_shadow); |
| |
| return bytes_read; |
| } |
| |
| /* |
| * nss_dtls_cmn_stats_ops. |
| */ |
| NSS_STATS_DECLARE_FILE_OPERATIONS(dtls_cmn); |
| |
| /* |
| * nss_dtls_cmn_stats_dentry_create() |
| * Create dtls common statistics debug entry. |
| */ |
| void nss_dtls_cmn_stats_dentry_create(void) |
| { |
| nss_stats_create_dentry("dtls_cmn", &nss_dtls_cmn_stats_ops); |
| } |
| |
| /* |
| * nss_dtls_cmn_stats_sync() |
| * Update dtls common node statistics. |
| */ |
| void nss_dtls_cmn_stats_sync(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm) |
| { |
| struct nss_dtls_cmn_msg *ndcm = (struct nss_dtls_cmn_msg *)ncm; |
| struct nss_dtls_cmn_ctx_stats *ndccs = &ndcm->msg.stats; |
| uint64_t *ctx_stats; |
| uint32_t *msg_stats; |
| uint16_t i = 0; |
| |
| spin_lock_bh(&nss_dtls_cmn_stats_lock); |
| |
| msg_stats = (uint32_t *)ndccs; |
| ctx_stats = nss_dtls_cmn_ctx_stats[ncm->interface]; |
| |
| for (i = 0; i < NSS_DTLS_CMN_CTX_STATS_MAX; i++, ctx_stats++, msg_stats++) { |
| *ctx_stats += *msg_stats; |
| } |
| |
| spin_unlock_bh(&nss_dtls_cmn_stats_lock); |
| } |
| |
| /* |
| * nss_dtls_cmn_stats_notify() |
| * Sends notifications to all the registered modules. |
| * |
| * Leverage NSS-FW statistics timing to update Netlink. |
| */ |
| void nss_dtls_cmn_stats_notify(struct nss_ctx_instance *nss_ctx, uint32_t if_num) |
| { |
| struct nss_dtls_cmn_stats_notification *dtls_cmn_stats; |
| |
| dtls_cmn_stats = kmalloc(sizeof(struct nss_dtls_cmn_stats_notification), GFP_ATOMIC); |
| if (!dtls_cmn_stats) { |
| nss_warning("Unable to allocate memory for stats notification\n"); |
| return; |
| } |
| |
| spin_lock_bh(&nss_dtls_cmn_stats_lock); |
| dtls_cmn_stats->core_id = nss_ctx->id; |
| dtls_cmn_stats->if_num = if_num; |
| memcpy(dtls_cmn_stats->stats_ctx, nss_dtls_cmn_ctx_stats[if_num], sizeof(dtls_cmn_stats->stats_ctx)); |
| spin_unlock_bh(&nss_dtls_cmn_stats_lock); |
| |
| atomic_notifier_call_chain(&nss_dtls_cmn_stats_notifier, NSS_STATS_EVENT_NOTIFY, dtls_cmn_stats); |
| kfree(dtls_cmn_stats); |
| } |
| |
| /* |
| * nss_dtls_cmn_stats_unregister_notifier() |
| * Deregisters statistics notifier. |
| */ |
| int nss_dtls_cmn_stats_unregister_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_unregister(&nss_dtls_cmn_stats_notifier, nb); |
| } |
| EXPORT_SYMBOL(nss_dtls_cmn_stats_unregister_notifier); |
| |
| /* |
| * nss_dtls_cmn_stats_register_notifier() |
| * Registers statistics notifier. |
| */ |
| int nss_dtls_cmn_stats_register_notifier(struct notifier_block *nb) |
| { |
| return atomic_notifier_chain_register(&nss_dtls_cmn_stats_notifier, nb); |
| } |
| EXPORT_SYMBOL(nss_dtls_cmn_stats_register_notifier); |