| /* |
| ************************************************************************** |
| * Copyright (c) 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_stats.h" |
| #include "nss_core.h" |
| #include "nss_tstamp_stats.h" |
| |
| /* |
| * Spinlock to protect TSTAMP statistics update/read |
| */ |
| DEFINE_SPINLOCK(nss_tstamp_stats_lock); |
| |
| /* |
| * nss_tstamp_stats_str |
| * TSTAMP stats strings |
| */ |
| struct nss_stats_info nss_tstamp_stats_str[NSS_TSTAMP_STATS_MAX] = { |
| {"rx_packets" , NSS_STATS_TYPE_COMMON}, |
| {"rx_bytes" , NSS_STATS_TYPE_COMMON}, |
| {"tx_packets" , NSS_STATS_TYPE_COMMON}, |
| {"tx_bytes" , NSS_STATS_TYPE_COMMON}, |
| {"rx_queue_0_dropped" , NSS_STATS_TYPE_DROP}, |
| {"rx_queue_1_dropped" , NSS_STATS_TYPE_DROP}, |
| {"rx_queue_2_dropped" , NSS_STATS_TYPE_DROP}, |
| {"rx_queue_3_dropped" , NSS_STATS_TYPE_DROP}, |
| {"boomeranged" , NSS_STATS_TYPE_SPECIAL}, |
| {"dropped_fail_enqueue" , NSS_STATS_TYPE_DROP}, |
| {"dropped_fail_alloc" , NSS_STATS_TYPE_DROP}, |
| {"dropped_fail_copy" , NSS_STATS_TYPE_DROP}, |
| {"dropped_no_interface" , NSS_STATS_TYPE_DROP}, |
| {"dropped_no_headroom" , NSS_STATS_TYPE_DROP} |
| }; |
| |
| /* |
| * nss_tstamp_stats |
| * tstamp statistics |
| */ |
| uint64_t nss_tstamp_stats[2][NSS_TSTAMP_STATS_MAX]; |
| |
| /* |
| * nss_tstamp_stats_read() |
| * Read tstamp statistics |
| */ |
| static ssize_t nss_tstamp_stats_read(struct file *fp, char __user *ubuf, size_t sz, loff_t *ppos) |
| { |
| int32_t i, num; |
| |
| /* |
| * Max output lines = (#stats + tx or rx tag + two blank lines) * 2(TX and RX) + |
| * start tag line + end tag line + three blank lines |
| */ |
| uint32_t max_output_lines = (NSS_TSTAMP_STATS_MAX + 3) * 2 + 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 -ENOMEM; |
| } |
| |
| stats_shadow = kzalloc(NSS_TSTAMP_STATS_MAX * sizeof(uint64_t), GFP_KERNEL); |
| if (unlikely(stats_shadow == NULL)) { |
| nss_warning("Could not allocate memory for local shadow buffer"); |
| kfree(lbuf); |
| return -ENOMEM; |
| } |
| size_wr += nss_stats_banner(lbuf, size_wr, size_al, "tstamp", NSS_STATS_SINGLE_CORE); |
| /* |
| * TSTAMP statistics |
| */ |
| for (num = 0; num < 2; num++) { |
| if (num == 0) { |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "\ntstamp TX stats:\n\n"); |
| } else { |
| size_wr += scnprintf(lbuf + size_wr, size_al - size_wr, "\ntstamp RX stats:\n\n"); |
| } |
| |
| spin_lock_bh(&nss_tstamp_stats_lock); |
| for (i = 0; i < NSS_TSTAMP_STATS_MAX; i++) { |
| stats_shadow[i] = nss_tstamp_stats[num][i]; |
| } |
| spin_unlock_bh(&nss_tstamp_stats_lock); |
| size_wr += nss_stats_print("tstamp", NULL, NSS_STATS_SINGLE_INSTANCE |
| , nss_tstamp_stats_str |
| , stats_shadow |
| , NSS_TSTAMP_STATS_MAX |
| , lbuf, size_wr, size_al); |
| } |
| |
| bytes_read = simple_read_from_buffer(ubuf, sz, ppos, lbuf, strlen(lbuf)); |
| kfree(lbuf); |
| kfree(stats_shadow); |
| |
| return bytes_read; |
| } |
| |
| /* |
| * nss_tstamp_stats_ops |
| */ |
| NSS_STATS_DECLARE_FILE_OPERATIONS(tstamp) |
| |
| /* |
| * nss_tstamp_stats_dentry_create() |
| * Create tstamp statistics debug entry. |
| */ |
| void nss_tstamp_stats_dentry_create(void) |
| { |
| nss_stats_create_dentry("tstamp", &nss_tstamp_stats_ops); |
| } |
| |
| /* |
| * nss_tstamp_stats_sync() |
| * Handle the syncing of NSS TSTAMP statistics. |
| */ |
| void nss_tstamp_stats_sync(struct nss_ctx_instance *nss_ctx, struct nss_tstamp_stats_msg *nts, uint32_t interface) |
| { |
| int id, j; |
| |
| if (interface == NSS_TSTAMP_TX_INTERFACE) { |
| id = 0; |
| } else { |
| id = 1; |
| } |
| |
| spin_lock_bh(&nss_tstamp_stats_lock); |
| |
| /* |
| * Common node stats |
| */ |
| nss_tstamp_stats[id][NSS_STATS_NODE_RX_PKTS] += nts->node_stats.rx_packets; |
| nss_tstamp_stats[id][NSS_STATS_NODE_RX_BYTES] += nts->node_stats.rx_bytes; |
| nss_tstamp_stats[id][NSS_STATS_NODE_TX_PKTS] += nts->node_stats.tx_packets; |
| nss_tstamp_stats[id][NSS_STATS_NODE_TX_BYTES] += nts->node_stats.tx_bytes; |
| |
| for (j = 0; j < NSS_MAX_NUM_PRI; j++) { |
| nss_tstamp_stats[id][NSS_STATS_NODE_RX_QUEUE_0_DROPPED + j] += nts->node_stats.rx_dropped[j]; |
| } |
| |
| /* |
| * TSTAMP statistics |
| */ |
| nss_tstamp_stats[id][NSS_TSTAMP_STATS_BOOMERANGED] += nts->boomeranged; |
| nss_tstamp_stats[id][NSS_TSTAMP_STATS_DROPPED_FAIL_ENQUEUE] += nts->dropped_fail_enqueue; |
| nss_tstamp_stats[id][NSS_TSTAMP_STATS_DROPPED_FAIL_ALLOC] += nts->dropped_fail_alloc; |
| nss_tstamp_stats[id][NSS_TSTAMP_STATS_DROPPED_FAIL_COPY] += nts->dropped_fail_copy; |
| nss_tstamp_stats[id][NSS_TSTAMP_STATS_DROPPED_NO_INTERFACE] += nts->dropped_no_interface; |
| nss_tstamp_stats[id][NSS_TSTAMP_STATS_DROPPED_NO_HEADROOM] += nts->dropped_no_headroom; |
| spin_unlock_bh(&nss_tstamp_stats_lock); |
| } |