diff options
Diffstat (limited to 'collectors/nfacct.plugin')
| -rw-r--r-- | collectors/nfacct.plugin/Makefile.am | 8 | ||||
| -rw-r--r-- | collectors/nfacct.plugin/README.md | 12 | ||||
| -rw-r--r-- | collectors/nfacct.plugin/plugin_nfacct.c | 822 | ||||
| -rw-r--r-- | collectors/nfacct.plugin/plugin_nfacct.h | 30 |
4 files changed, 872 insertions, 0 deletions
diff --git a/collectors/nfacct.plugin/Makefile.am b/collectors/nfacct.plugin/Makefile.am new file mode 100644 index 0000000..19554be --- /dev/null +++ b/collectors/nfacct.plugin/Makefile.am @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-3.0-or-later + +AUTOMAKE_OPTIONS = subdir-objects +MAINTAINERCLEANFILES = $(srcdir)/Makefile.in + +dist_noinst_DATA = \ + README.md \ + $(NULL) diff --git a/collectors/nfacct.plugin/README.md b/collectors/nfacct.plugin/README.md new file mode 100644 index 0000000..5f1ee2e --- /dev/null +++ b/collectors/nfacct.plugin/README.md @@ -0,0 +1,12 @@ +# nfacct.plugin + +This plugin that collects NFACCT statistics. + +It is currently disabled by default, because it requires root access. +We have to move the code to an external plugin to setuid just the plugin not the whole netdata server. + +You can build netdata with it to test it though. +Just run `./configure` (or `netdata-installer.sh`) with the option `--enable-plugin-nfacct` (and any other options you may need). +Remember, you have to tell netdata you want it to run as `root` for this plugin to work. + +[]() diff --git a/collectors/nfacct.plugin/plugin_nfacct.c b/collectors/nfacct.plugin/plugin_nfacct.c new file mode 100644 index 0000000..7d42dd1 --- /dev/null +++ b/collectors/nfacct.plugin/plugin_nfacct.c @@ -0,0 +1,822 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "plugin_nfacct.h" + +#if defined(INTERNAL_PLUGIN_NFACCT) + +#define PLUGIN_NFACCT_NAME "nfacct.plugin" + +#ifdef HAVE_LIBMNL +#include <libmnl/libmnl.h> + +static inline size_t mnl_buffer_size() { + long s = MNL_SOCKET_BUFFER_SIZE; + if(s <= 0) return 8192; + return (size_t)s; +} + +// ---------------------------------------------------------------------------- +// DO_NFSTAT - collect netfilter connection tracker statistics via netlink +// example: https://github.com/formorer/pkg-conntrack-tools/blob/master/src/conntrack.c + +#ifdef HAVE_LINUX_NETFILTER_NFNETLINK_CONNTRACK_H +#define DO_NFSTAT 1 + +#define RRD_TYPE_NET_STAT_NETFILTER "netfilter" +#define RRD_TYPE_NET_STAT_CONNTRACK "netlink" + +#include <linux/netfilter/nfnetlink_conntrack.h> + +static struct { + int update_every; + char *buf; + size_t buf_size; + struct mnl_socket *mnl; + struct nlmsghdr *nlh; + struct nfgenmsg *nfh; + unsigned int seq; + uint32_t portid; + + struct nlattr *tb[CTA_STATS_MAX+1]; + const char *attr2name[CTA_STATS_MAX+1]; + kernel_uint_t metrics[CTA_STATS_MAX+1]; + + struct nlattr *tb_exp[CTA_STATS_EXP_MAX+1]; + const char *attr2name_exp[CTA_STATS_EXP_MAX+1]; + kernel_uint_t metrics_exp[CTA_STATS_EXP_MAX+1]; +} nfstat_root = { + .update_every = 1, + .buf = NULL, + .buf_size = 0, + .mnl = NULL, + .nlh = NULL, + .nfh = NULL, + .seq = 0, + .portid = 0, + .tb = {}, + .attr2name = { + [CTA_STATS_SEARCHED] = "searched", + [CTA_STATS_FOUND] = "found", + [CTA_STATS_NEW] = "new", + [CTA_STATS_INVALID] = "invalid", + [CTA_STATS_IGNORE] = "ignore", + [CTA_STATS_DELETE] = "delete", + [CTA_STATS_DELETE_LIST] = "delete_list", + [CTA_STATS_INSERT] = "insert", + [CTA_STATS_INSERT_FAILED] = "insert_failed", + [CTA_STATS_DROP] = "drop", + [CTA_STATS_EARLY_DROP] = "early_drop", + [CTA_STATS_ERROR] = "icmp_error", + [CTA_STATS_SEARCH_RESTART] = "search_restart", + }, + .metrics = {}, + .tb_exp = {}, + .attr2name_exp = { + [CTA_STATS_EXP_NEW] = "new", + [CTA_STATS_EXP_CREATE] = "created", + [CTA_STATS_EXP_DELETE] = "deleted", + }, + .metrics_exp = {} +}; + + +static int nfstat_init(int update_every) { + nfstat_root.update_every = update_every; + + nfstat_root.buf_size = mnl_buffer_size(); + nfstat_root.buf = mallocz(nfstat_root.buf_size); + + nfstat_root.mnl = mnl_socket_open(NETLINK_NETFILTER); + if(!nfstat_root.mnl) { + error("NFSTAT: mnl_socket_open() failed"); + return 1; + } + + nfstat_root.seq = (unsigned int)now_realtime_sec() - 1; + + if(mnl_socket_bind(nfstat_root.mnl, 0, MNL_SOCKET_AUTOPID) < 0) { + error("NFSTAT: mnl_socket_bind() failed"); + return 1; + } + nfstat_root.portid = mnl_socket_get_portid(nfstat_root.mnl); + + return 0; +} + +static void nfstat_cleanup() { + if(nfstat_root.mnl) { + mnl_socket_close(nfstat_root.mnl); + nfstat_root.mnl = NULL; + } + + freez(nfstat_root.buf); + nfstat_root.buf = NULL; + nfstat_root.buf_size = 0; +} + +static struct nlmsghdr * nfct_mnl_nlmsghdr_put(char *buf, uint16_t subsys, uint16_t type, uint8_t family, uint32_t seq) { + struct nlmsghdr *nlh; + struct nfgenmsg *nfh; + + nlh = mnl_nlmsg_put_header(buf); + nlh->nlmsg_type = (subsys << 8) | type; + nlh->nlmsg_flags = NLM_F_REQUEST|NLM_F_DUMP; + nlh->nlmsg_seq = seq; + + nfh = mnl_nlmsg_put_extra_header(nlh, sizeof(struct nfgenmsg)); + nfh->nfgen_family = family; + nfh->version = NFNETLINK_V0; + nfh->res_id = 0; + + return nlh; +} + +static int nfct_stats_attr_cb(const struct nlattr *attr, void *data) { + const struct nlattr **tb = data; + int type = mnl_attr_get_type(attr); + + if (mnl_attr_type_valid(attr, CTA_STATS_MAX) < 0) + return MNL_CB_OK; + + if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) { + error("NFSTAT: mnl_attr_validate() failed"); + return MNL_CB_ERROR; + } + + tb[type] = attr; + return MNL_CB_OK; +} + +static int nfstat_callback(const struct nlmsghdr *nlh, void *data) { + (void)data; + + struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh); + + mnl_attr_parse(nlh, sizeof(*nfg), nfct_stats_attr_cb, nfstat_root.tb); + + // printf("cpu=%-4u\t", ntohs(nfg->res_id)); + + int i; + // add the metrics of this CPU into the metrics + for (i = 0; i < CTA_STATS_MAX+1; i++) { + if (nfstat_root.tb[i]) { + // printf("%s=%u ", nfstat_root.attr2name[i], ntohl(mnl_attr_get_u32(nfstat_root.tb[i]))); + nfstat_root.metrics[i] += ntohl(mnl_attr_get_u32(nfstat_root.tb[i])); + } + } + // printf("\n"); + + return MNL_CB_OK; +} + +static int nfstat_collect_conntrack() { + // zero all metrics - we will sum the metrics of all CPUs later + int i; + for (i = 0; i < CTA_STATS_MAX+1; i++) + nfstat_root.metrics[i] = 0; + + // prepare the request + nfstat_root.nlh = nfct_mnl_nlmsghdr_put(nfstat_root.buf, NFNL_SUBSYS_CTNETLINK, IPCTNL_MSG_CT_GET_STATS_CPU, AF_UNSPEC, nfstat_root.seq); + + // send the request + if(mnl_socket_sendto(nfstat_root.mnl, nfstat_root.nlh, nfstat_root.nlh->nlmsg_len) < 0) { + error("NFSTAT: mnl_socket_sendto() failed"); + return 1; + } + + // get the reply + ssize_t ret; + while ((ret = mnl_socket_recvfrom(nfstat_root.mnl, nfstat_root.buf, nfstat_root.buf_size)) > 0) { + if(mnl_cb_run( + nfstat_root.buf + , (size_t)ret + , nfstat_root.nlh->nlmsg_seq + , nfstat_root.portid + , nfstat_callback + , NULL + ) <= MNL_CB_STOP) + break; + } + + // verify we run without issues + if (ret == -1) { + error("NFSTAT: error communicating with kernel. This plugin can only work when netdata runs as root."); + return 1; + } + + return 0; +} + +static int nfexp_stats_attr_cb(const struct nlattr *attr, void *data) +{ + const struct nlattr **tb = data; + int type = mnl_attr_get_type(attr); + + if (mnl_attr_type_valid(attr, CTA_STATS_EXP_MAX) < 0) + return MNL_CB_OK; + + if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) { + error("NFSTAT EXP: mnl_attr_validate() failed"); + return MNL_CB_ERROR; + } + + tb[type] = attr; + return MNL_CB_OK; +} + +static int nfstat_callback_exp(const struct nlmsghdr *nlh, void *data) { + (void)data; + + struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh); + + mnl_attr_parse(nlh, sizeof(*nfg), nfexp_stats_attr_cb, nfstat_root.tb_exp); + + int i; + for (i = 0; i < CTA_STATS_EXP_MAX+1; i++) { + if (nfstat_root.tb_exp[i]) { + nfstat_root.metrics_exp[i] += ntohl(mnl_attr_get_u32(nfstat_root.tb_exp[i])); + } + } + + return MNL_CB_OK; +} + +static int nfstat_collect_conntrack_expectations() { + // zero all metrics - we will sum the metrics of all CPUs later + int i; + for (i = 0; i < CTA_STATS_EXP_MAX+1; i++) + nfstat_root.metrics_exp[i] = 0; + + // prepare the request + nfstat_root.nlh = nfct_mnl_nlmsghdr_put(nfstat_root.buf, NFNL_SUBSYS_CTNETLINK_EXP, IPCTNL_MSG_EXP_GET_STATS_CPU, AF_UNSPEC, nfstat_root.seq); + + // send the request + if(mnl_socket_sendto(nfstat_root.mnl, nfstat_root.nlh, nfstat_root.nlh->nlmsg_len) < 0) { + error("NFSTAT: mnl_socket_sendto() failed"); + return 1; + } + + // get the reply + ssize_t ret; + while ((ret = mnl_socket_recvfrom(nfstat_root.mnl, nfstat_root.buf, nfstat_root.buf_size)) > 0) { + if(mnl_cb_run( + nfstat_root.buf + , (size_t)ret + , nfstat_root.nlh->nlmsg_seq + , nfstat_root.portid + , nfstat_callback_exp + , NULL + ) <= MNL_CB_STOP) + break; + } + + // verify we run without issues + if (ret == -1) { + error("NFSTAT: error communicating with kernel. This plugin can only work when netdata runs as root."); + return 1; + } + + return 0; +} + +static int nfstat_collect() { + nfstat_root.seq++; + + if(nfstat_collect_conntrack()) + return 1; + + if(nfstat_collect_conntrack_expectations()) + return 1; + + return 0; +} + +static void nfstat_send_metrics() { + + { + static RRDSET *st_new = NULL; + static RRDDIM *rd_new = NULL, *rd_ignore = NULL, *rd_invalid = NULL; + + if(!st_new) { + st_new = rrdset_create_localhost( + RRD_TYPE_NET_STAT_NETFILTER + , RRD_TYPE_NET_STAT_CONNTRACK "_new" + , NULL + , RRD_TYPE_NET_STAT_CONNTRACK + , NULL + , "Connection Tracker New Connections" + , "connections/s" + , PLUGIN_NFACCT_NAME + , NULL + , NETDATA_CHART_PRIO_NETFILTER_NEW + , nfstat_root.update_every + , RRDSET_TYPE_LINE + ); + + rd_new = rrddim_add(st_new, nfstat_root.attr2name[CTA_STATS_NEW], NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_ignore = rrddim_add(st_new, nfstat_root.attr2name[CTA_STATS_IGNORE], NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_invalid = rrddim_add(st_new, nfstat_root.attr2name[CTA_STATS_INVALID], NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL); + } + else + rrdset_next(st_new); + + rrddim_set_by_pointer(st_new, rd_new, (collected_number) nfstat_root.metrics[CTA_STATS_NEW]); + rrddim_set_by_pointer(st_new, rd_ignore, (collected_number) nfstat_root.metrics[CTA_STATS_IGNORE]); + rrddim_set_by_pointer(st_new, rd_invalid, (collected_number) nfstat_root.metrics[CTA_STATS_INVALID]); + + rrdset_done(st_new); + } + + // ---------------------------------------------------------------- + + { + static RRDSET *st_changes = NULL; + static RRDDIM *rd_inserted = NULL, *rd_deleted = NULL, *rd_delete_list = NULL; + + if(!st_changes) { + st_changes = rrdset_create_localhost( + RRD_TYPE_NET_STAT_NETFILTER + , RRD_TYPE_NET_STAT_CONNTRACK "_changes" + , NULL + , RRD_TYPE_NET_STAT_CONNTRACK + , NULL + , "Connection Tracker Changes" + , "changes/s" + , PLUGIN_NFACCT_NAME + , NULL + , NETDATA_CHART_PRIO_NETFILTER_CHANGES + , nfstat_root.update_every + , RRDSET_TYPE_LINE + ); + rrdset_flag_set(st_changes, RRDSET_FLAG_DETAIL); + + rd_inserted = rrddim_add(st_changes, nfstat_root.attr2name[CTA_STATS_INSERT], NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_deleted = rrddim_add(st_changes, nfstat_root.attr2name[CTA_STATS_DELETE], NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_delete_list = rrddim_add(st_changes, nfstat_root.attr2name[CTA_STATS_DELETE_LIST], NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL); + } + else + rrdset_next(st_changes); + + rrddim_set_by_pointer(st_changes, rd_inserted, (collected_number) nfstat_root.metrics[CTA_STATS_INSERT]); + rrddim_set_by_pointer(st_changes, rd_deleted, (collected_number) nfstat_root.metrics[CTA_STATS_DELETE]); + rrddim_set_by_pointer(st_changes, rd_delete_list, (collected_number) nfstat_root.metrics[CTA_STATS_DELETE_LIST]); + + rrdset_done(st_changes); + } + + // ---------------------------------------------------------------- + + { + static RRDSET *st_search = NULL; + static RRDDIM *rd_searched = NULL, *rd_restarted = NULL, *rd_found = NULL; + + if(!st_search) { + st_search = rrdset_create_localhost( + RRD_TYPE_NET_STAT_NETFILTER + , RRD_TYPE_NET_STAT_CONNTRACK "_search" + , NULL + , RRD_TYPE_NET_STAT_CONNTRACK + , NULL + , "Connection Tracker Searches" + , "searches/s" + , PLUGIN_NFACCT_NAME + , NULL + , NETDATA_CHART_PRIO_NETFILTER_SEARCH + , nfstat_root.update_every + , RRDSET_TYPE_LINE + ); + rrdset_flag_set(st_search, RRDSET_FLAG_DETAIL); + + rd_searched = rrddim_add(st_search, nfstat_root.attr2name[CTA_STATS_SEARCHED], NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_restarted = rrddim_add(st_search, nfstat_root.attr2name[CTA_STATS_SEARCH_RESTART], NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_found = rrddim_add(st_search, nfstat_root.attr2name[CTA_STATS_FOUND], NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL); + } + else + rrdset_next(st_search); + + rrddim_set_by_pointer(st_search, rd_searched, (collected_number) nfstat_root.metrics[CTA_STATS_SEARCHED]); + rrddim_set_by_pointer(st_search, rd_restarted, (collected_number) nfstat_root.metrics[CTA_STATS_SEARCH_RESTART]); + rrddim_set_by_pointer(st_search, rd_found, (collected_number) nfstat_root.metrics[CTA_STATS_FOUND]); + + rrdset_done(st_search); + } + + // ---------------------------------------------------------------- + + { + static RRDSET *st_errors = NULL; + static RRDDIM *rd_error = NULL, *rd_insert_failed = NULL, *rd_drop = NULL, *rd_early_drop = NULL; + + if(!st_errors) { + st_errors = rrdset_create_localhost( + RRD_TYPE_NET_STAT_NETFILTER + , RRD_TYPE_NET_STAT_CONNTRACK "_errors" + , NULL + , RRD_TYPE_NET_STAT_CONNTRACK + , NULL + , "Connection Tracker Errors" + , "events/s" + , PLUGIN_NFACCT_NAME + , NULL + , NETDATA_CHART_PRIO_NETFILTER_ERRORS + , nfstat_root.update_every + , RRDSET_TYPE_LINE + ); + rrdset_flag_set(st_errors, RRDSET_FLAG_DETAIL); + + rd_error = rrddim_add(st_errors, nfstat_root.attr2name[CTA_STATS_ERROR], NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_insert_failed = rrddim_add(st_errors, nfstat_root.attr2name[CTA_STATS_INSERT_FAILED], NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_drop = rrddim_add(st_errors, nfstat_root.attr2name[CTA_STATS_DROP], NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_early_drop = rrddim_add(st_errors, nfstat_root.attr2name[CTA_STATS_EARLY_DROP], NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL); + } + else + rrdset_next(st_errors); + + rrddim_set_by_pointer(st_errors, rd_error, (collected_number) nfstat_root.metrics[CTA_STATS_ERROR]); + rrddim_set_by_pointer(st_errors, rd_insert_failed, (collected_number) nfstat_root.metrics[CTA_STATS_INSERT_FAILED]); + rrddim_set_by_pointer(st_errors, rd_drop, (collected_number) nfstat_root.metrics[CTA_STATS_DROP]); + rrddim_set_by_pointer(st_errors, rd_early_drop, (collected_number) nfstat_root.metrics[CTA_STATS_EARLY_DROP]); + + rrdset_done(st_errors); + } + + // ---------------------------------------------------------------- + + { + static RRDSET *st_expect = NULL; + static RRDDIM *rd_new = NULL, *rd_created = NULL, *rd_deleted = NULL; + + if(!st_expect) { + st_expect = rrdset_create_localhost( + RRD_TYPE_NET_STAT_NETFILTER + , RRD_TYPE_NET_STAT_CONNTRACK "_expect" + , NULL + , RRD_TYPE_NET_STAT_CONNTRACK + , NULL + , "Connection Tracker Expectations" + , "expectations/s" + , PLUGIN_NFACCT_NAME + , NULL + , NETDATA_CHART_PRIO_NETFILTER_EXPECT + , nfstat_root.update_every + , RRDSET_TYPE_LINE + ); + rrdset_flag_set(st_expect, RRDSET_FLAG_DETAIL); + + rd_created = rrddim_add(st_expect, nfstat_root.attr2name_exp[CTA_STATS_EXP_CREATE], NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_deleted = rrddim_add(st_expect, nfstat_root.attr2name_exp[CTA_STATS_EXP_DELETE], NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL); + rd_new = rrddim_add(st_expect, nfstat_root.attr2name_exp[CTA_STATS_EXP_NEW], NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL); + } + else + rrdset_next(st_expect); + + rrddim_set_by_pointer(st_expect, rd_created, (collected_number) nfstat_root.metrics_exp[CTA_STATS_EXP_CREATE]); + rrddim_set_by_pointer(st_expect, rd_deleted, (collected_number) nfstat_root.metrics_exp[CTA_STATS_EXP_DELETE]); + rrddim_set_by_pointer(st_expect, rd_new, (collected_number) nfstat_root.metrics_exp[CTA_STATS_EXP_NEW]); + + rrdset_done(st_expect); + } + +} + +#endif // HAVE_LINUX_NETFILTER_NFNETLINK_CONNTRACK_H + + +// ---------------------------------------------------------------------------- +// DO_NFACCT - collect netfilter accounting statistics via netlink + +#ifdef HAVE_LIBNETFILTER_ACCT +#define DO_NFACCT 1 + +#include <libnetfilter_acct/libnetfilter_acct.h> + +struct nfacct_data { + char *name; + uint32_t hash; + + uint64_t pkts; + uint64_t bytes; + + RRDDIM *rd_bytes; + RRDDIM *rd_packets; + + int updated; + + struct nfacct_data *next; +}; + +static struct { + int update_every; + char *buf; + size_t buf_size; + struct mnl_socket *mnl; + struct nlmsghdr *nlh; + unsigned int seq; + uint32_t portid; + struct nfacct *nfacct_buffer; + struct nfacct_data *nfacct_metrics; +} nfacct_root = { + .update_every = 1, + .buf = NULL, + .buf_size = 0, + .mnl = NULL, + .nlh = NULL, + .seq = 0, + .portid = 0, + .nfacct_buffer = NULL, + .nfacct_metrics = NULL +}; + +static inline struct nfacct_data *nfacct_data_get(const char *name, uint32_t hash) { + struct nfacct_data *d = NULL, *last = NULL; + for(d = nfacct_root.nfacct_metrics; d ; last = d, d = d->next) { + if(unlikely(d->hash == hash && !strcmp(d->name, name))) + return d; + } + + d = callocz(1, sizeof(struct nfacct_data)); + d->name = strdupz(name); + d->hash = hash; + + if(!last) { + d->next = nfacct_root.nfacct_metrics; + nfacct_root.nfacct_metrics = d; + } + else { + d->next = last->next; + last->next = d; + } + + return d; +} + +static int nfacct_init(int update_every) { + nfacct_root.update_every = update_every; + + nfacct_root.buf_size = mnl_buffer_size(); + nfacct_root.buf = mallocz(nfacct_root.buf_size); + + nfacct_root.nfacct_buffer = nfacct_alloc(); + if(!nfacct_root.nfacct_buffer) { + error("nfacct.plugin: nfacct_alloc() failed."); + return 0; + } + + nfacct_root.seq = (unsigned int)now_realtime_sec() - 1; + + nfacct_root.mnl = mnl_socket_open(NETLINK_NETFILTER); + if(!nfacct_root.mnl) { + error("nfacct.plugin: mnl_socket_open() failed"); + return 1; + } + + if(mnl_socket_bind(nfacct_root.mnl, 0, MNL_SOCKET_AUTOPID) < 0) { + error("nfacct.plugin: mnl_socket_bind() failed"); + return 1; + } + nfacct_root.portid = mnl_socket_get_portid(nfacct_root.mnl); + + return 0; +} + +static void nfacct_cleanup() { + if(nfacct_root.mnl) { + mnl_socket_close(nfacct_root.mnl); + nfacct_root.mnl = NULL; + } + + if(nfacct_root.nfacct_buffer) { + nfacct_free(nfacct_root.nfacct_buffer); + nfacct_root.nfacct_buffer = NULL; + } + + freez(nfacct_root.buf); + nfacct_root.buf = NULL; + nfacct_root.buf_size = 0; + + // TODO: cleanup the metrics linked list +} + +static int nfacct_callback(const struct nlmsghdr *nlh, void *data) { + (void)data; + + if(nfacct_nlmsg_parse_payload(nlh, nfacct_root.nfacct_buffer) < 0) { + error("NFACCT: nfacct_nlmsg_parse_payload() failed."); + return MNL_CB_OK; + } + + const char *name = nfacct_attr_get_str(nfacct_root.nfacct_buffer, NFACCT_ATTR_NAME); + uint32_t hash = simple_hash(name); + + struct nfacct_data *d = nfacct_data_get(name, hash); + + d->pkts = nfacct_attr_get_u64(nfacct_root.nfacct_buffer, NFACCT_ATTR_PKTS); + d->bytes = nfacct_attr_get_u64(nfacct_root.nfacct_buffer, NFACCT_ATTR_BYTES); + d->updated = 1; + + return MNL_CB_OK; +} + +static int nfacct_collect() { + // mark all old metrics as not-updated + struct nfacct_data *d; + for(d = nfacct_root.nfacct_metrics; d ; d = d->next) + d->updated = 0; + + // prepare the request + nfacct_root.seq++; + nfacct_root.nlh = nfacct_nlmsg_build_hdr(nfacct_root.buf, NFNL_MSG_ACCT_GET, NLM_F_DUMP, (uint32_t)nfacct_root.seq); + if(!nfacct_root.nlh) { + error("NFACCT: nfacct_nlmsg_build_hdr() failed"); + return 1; + } + + // send the request + if(mnl_socket_sendto(nfacct_root.mnl, nfacct_root.nlh, nfacct_root.nlh->nlmsg_len) < 0) { + error("NFACCT: mnl_socket_sendto() failed"); + return 1; + } + + // get the reply + ssize_t ret; + while((ret = mnl_socket_recvfrom(nfacct_root.mnl, nfacct_root.buf, nfacct_root.buf_size)) > 0) { + if(mnl_cb_run( + nfacct_root.buf + , (size_t)ret + , nfacct_root.seq + , nfacct_root.portid + , nfacct_callback + , NULL + ) <= 0) + break; + } + + // verify we run without issues + if (ret == -1) { + error("NFACCT: error communicating with kernel. This plugin can only work when netdata runs as root."); + return 1; + } + + return 0; +} + +static void nfacct_send_metrics() { + static RRDSET *st_bytes = NULL, *st_packets = NULL; + + if(!nfacct_root.nfacct_metrics) return; + struct nfacct_data *d; + + if(!st_packets) { + st_packets = rrdset_create_localhost( + "netfilter" + , "nfacct_packets" + , NULL + , "nfacct" + , NULL + , "Netfilter Accounting Packets" + , "packets/s" + , PLUGIN_NFACCT_NAME + , NULL + , NETDATA_CHART_PRIO_NETFILTER_PACKETS + , nfacct_root.update_every + , RRDSET_TYPE_STACKED + ); + } + else rrdset_next(st_packets); + + for(d = nfacct_root.nfacct_metrics; d ; d = d->next) { + if(likely(d->updated)) { + if(unlikely(!d->rd_packets)) + d->rd_packets = rrddim_add( + st_packets + , d->name + , NULL + , 1 + , nfacct_root.update_every + , RRD_ALGORITHM_INCREMENTAL + ); + + rrddim_set_by_pointer( + st_packets + , d->rd_packets + , (collected_number)d->pkts + ); + } + } + + rrdset_done(st_packets); + + // ---------------------------------------------------------------- + + st_bytes = rrdset_find_bytype_localhost("netfilter", "nfacct_bytes"); + if(!st_bytes) { + st_bytes = rrdset_create_localhost( + "netfilter" + , "nfacct_bytes" + , NULL + , "nfacct" + , NULL + , "Netfilter Accounting Bandwidth" + , "kilobytes/s" + , PLUGIN_NFACCT_NAME + , NULL + , NETDATA_CHART_PRIO_NETFILTER_BYTES + , nfacct_root.update_every + , RRDSET_TYPE_STACKED + ); + } + else rrdset_next(st_bytes); + + for(d = nfacct_root.nfacct_metrics; d ; d = d->next) { + if(likely(d->updated)) { + if(unlikely(!d->rd_bytes)) + d->rd_bytes = rrddim_add( + st_bytes + , d->name + , NULL + , 1 + , 1000 * nfacct_root.update_every + , RRD_ALGORITHM_INCREMENTAL + ); + + rrddim_set_by_pointer( + st_bytes + , d->rd_bytes + , (collected_number)d->bytes + ); + } + } + + rrdset_done(st_bytes); +} + +#endif // HAVE_LIBNETFILTER_ACCT +#endif // HAVE_LIBMNL + +// ---------------------------------------------------------------------------- + +static void nfacct_main_cleanup(void *ptr) { + struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr; + static_thread->enabled = NETDATA_MAIN_THREAD_EXITING; + info("cleaning up..."); + +#ifdef DO_NFACCT + nfacct_cleanup(); +#endif + +#ifdef DO_NFSTAT + nfstat_cleanup(); +#endif + + static_thread->enabled = NETDATA_MAIN_THREAD_EXITED; +} + +void *nfacct_main(void *ptr) { + netdata_thread_cleanup_push(nfacct_main_cleanup, ptr); + + int update_every = (int)config_get_number("plugin:netfilter", "update every", localhost->rrd_update_every); + if(update_every < localhost->rrd_update_every) + update_every = localhost->rrd_update_every; + +#ifdef DO_NFACCT + int nfacct = !nfacct_init(update_every); +#endif + +#ifdef DO_NFSTAT + int nfstat = !nfstat_init(update_every); +#endif + + // ------------------------------------------------------------------------ + + usec_t step = update_every * USEC_PER_SEC; + heartbeat_t hb; + heartbeat_init(&hb); + for(;;) { + heartbeat_next(&hb, step); + + if(unlikely(netdata_exit)) break; + +#ifdef DO_NFACCT + if(likely(nfacct)) { + nfacct = !nfacct_collect(); + + if(likely(nfacct)) + nfacct_send_metrics(); + } +#endif + +#ifdef DO_NFSTAT + if(likely(nfstat)) { + nfstat = !nfstat_collect(); + + if(likely(nfstat)) + nfstat_send_metrics(); + } +#endif + } + + netdata_thread_cleanup_pop(1); + return NULL; +} + +#endif // INTERNAL_PLUGIN_NFACCT diff --git a/collectors/nfacct.plugin/plugin_nfacct.h b/collectors/nfacct.plugin/plugin_nfacct.h new file mode 100644 index 0000000..4311cce --- /dev/null +++ b/collectors/nfacct.plugin/plugin_nfacct.h @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#ifndef NETDATA_NFACCT_H +#define NETDATA_NFACCT_H 1 + +#include "../../daemon/common.h" + +#if defined(INTERNAL_PLUGIN_NFACCT) + +#define NETDATA_PLUGIN_HOOK_LINUX_NFACCT \ + { \ + .name = "PLUGIN[nfacct]", \ + .config_section = CONFIG_SECTION_PLUGINS, \ + .config_name = "nfacct", \ + .enabled = 1, \ + .thread = NULL, \ + .init_routine = NULL, \ + .start_routine = nfacct_main \ + }, + +extern void *nfacct_main(void *ptr); + +#else // !defined(INTERNAL_PLUGIN_NFACCT) + +#define NETDATA_PLUGIN_HOOK_LINUX_NFACCT + +#endif // defined(INTERNAL_PLUGIN_NFACCT) + +#endif /* NETDATA_NFACCT_H */ + |