| /* |
| ************************************************************************** |
| * Copyright (c) 2016-2017, 2019 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_sjack_stats.h" |
| |
| /* |
| * nss_sjack_stats_read() |
| * Read SJACK stats |
| */ |
| static ssize_t nss_sjack_stats_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos) |
| { |
| /* |
| * max output lines = #stats + start tag line + end tag line + three blank lines |
| */ |
| uint32_t max_output_lines = NSS_STATS_NODE_MAX + 5; |
| size_t size_al = NSS_STATS_MAX_STR_LENGTH * max_output_lines; |
| size_t size_wr = 0; |
| ssize_t bytes_read = 0; |
| uint64_t *stats_shadow; |
| |
| char *lbuf = kzalloc(size_al, GFP_KERNEL); |
| if (unlikely(lbuf == NULL)) { |
| nss_warning("Could not allocate memory for local statistics buffer"); |
| return 0; |
| } |
| |
| stats_shadow = kzalloc(NSS_STATS_NODE_MAX * 8, GFP_KERNEL); |
| if (unlikely(stats_shadow == NULL)) { |
| nss_warning("Could not allocate memory for local shadow buffer"); |
| kfree(lbuf); |
| return 0; |
| } |
| size_wr += nss_stats_banner(lbuf, size_wr, size_al, "sjack", NSS_STATS_SINGLE_CORE); |
| size_wr += nss_stats_fill_common_stats(NSS_SJACK_INTERFACE, NSS_STATS_SINGLE_INSTANCE, lbuf, size_wr, size_al, "sjack"); |
| |
| bytes_read = simple_read_from_buffer(ubuf, sz, ppos, lbuf, strlen(lbuf)); |
| kfree(lbuf); |
| kfree(stats_shadow); |
| |
| return bytes_read; |
| } |
| |
| /* |
| * nss_sjack_stats_ops |
| */ |
| NSS_STATS_DECLARE_FILE_OPERATIONS(sjack) |
| |
| /* |
| * nss_sjack_stats_dentry_create() |
| * Create SJACK node statistics debug entry. |
| */ |
| void nss_sjack_stats_dentry_create(void) |
| { |
| nss_stats_create_dentry("sjack", &nss_sjack_stats_ops); |
| } |
| |
| /* |
| * nss_sjack_stats_node_sync() |
| * Update sjack node stats. |
| */ |
| void nss_sjack_stats_node_sync(struct nss_ctx_instance *nss_ctx, struct nss_sjack_stats_sync_msg *nins) |
| { |
| struct nss_top_instance *nss_top = nss_ctx->nss_top; |
| int j; |
| |
| /* |
| * Update SJACK node stats. |
| */ |
| spin_lock_bh(&nss_top->stats_lock); |
| nss_top->stats_node[NSS_SJACK_INTERFACE][NSS_SJACK_STATS_RX_PKTS] += nins->node_stats.rx_packets; |
| nss_top->stats_node[NSS_SJACK_INTERFACE][NSS_SJACK_STATS_RX_BYTES] += nins->node_stats.rx_bytes; |
| nss_top->stats_node[NSS_SJACK_INTERFACE][NSS_SJACK_STATS_TX_PKTS] += nins->node_stats.tx_packets; |
| nss_top->stats_node[NSS_SJACK_INTERFACE][NSS_SJACK_STATS_TX_BYTES] += nins->node_stats.tx_bytes; |
| |
| for (j = 0; j < NSS_MAX_NUM_PRI; j++) { |
| nss_top->stats_node[NSS_SJACK_INTERFACE][NSS_SJACK_STATS_RX_QUEUE_0_DROPPED + j] += nins->node_stats.rx_dropped[j]; |
| } |
| |
| spin_unlock_bh(&nss_top->stats_lock); |
| } |