diff options
Diffstat (limited to 'samples/bpf/xdp_sample_user.c')
| -rw-r--r-- | samples/bpf/xdp_sample_user.c | 1673 |
1 files changed, 1673 insertions, 0 deletions
diff --git a/samples/bpf/xdp_sample_user.c b/samples/bpf/xdp_sample_user.c new file mode 100644 index 000000000..158682852 --- /dev/null +++ b/samples/bpf/xdp_sample_user.c @@ -0,0 +1,1673 @@ +// SPDX-License-Identifier: GPL-2.0-only +#define _GNU_SOURCE + +#include <arpa/inet.h> +#include <bpf/bpf.h> +#include <bpf/libbpf.h> +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <linux/ethtool.h> +#include <linux/hashtable.h> +#include <linux/if_link.h> +#include <linux/jhash.h> +#include <linux/limits.h> +#include <linux/list.h> +#include <linux/sockios.h> +#include <locale.h> +#include <math.h> +#include <net/if.h> +#include <poll.h> +#include <signal.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/signalfd.h> +#include <sys/sysinfo.h> +#include <sys/timerfd.h> +#include <sys/utsname.h> +#include <time.h> +#include <unistd.h> + +#include "bpf_util.h" +#include "xdp_sample_user.h" + +#define __sample_print(fmt, cond, ...) \ + ({ \ + if (cond) \ + printf(fmt, ##__VA_ARGS__); \ + }) + +#define print_always(fmt, ...) __sample_print(fmt, 1, ##__VA_ARGS__) +#define print_default(fmt, ...) \ + __sample_print(fmt, sample_log_level & LL_DEFAULT, ##__VA_ARGS__) +#define __print_err(err, fmt, ...) \ + ({ \ + __sample_print(fmt, err > 0 || sample_log_level & LL_DEFAULT, \ + ##__VA_ARGS__); \ + sample_err_exp = sample_err_exp ? true : err > 0; \ + }) +#define print_err(err, fmt, ...) __print_err(err, fmt, ##__VA_ARGS__) + +#define __COLUMN(x) "%'10" x " %-13s" +#define FMT_COLUMNf __COLUMN(".0f") +#define FMT_COLUMNd __COLUMN("d") +#define FMT_COLUMNl __COLUMN("llu") +#define RX(rx) rx, "rx/s" +#define PPS(pps) pps, "pkt/s" +#define DROP(drop) drop, "drop/s" +#define ERR(err) err, "error/s" +#define HITS(hits) hits, "hit/s" +#define XMIT(xmit) xmit, "xmit/s" +#define PASS(pass) pass, "pass/s" +#define REDIR(redir) redir, "redir/s" +#define NANOSEC_PER_SEC 1000000000 /* 10^9 */ + +#define XDP_UNKNOWN (XDP_REDIRECT + 1) +#define XDP_ACTION_MAX (XDP_UNKNOWN + 1) +#define XDP_REDIRECT_ERR_MAX 7 + +enum map_type { + MAP_RX, + MAP_REDIRECT_ERR, + MAP_CPUMAP_ENQUEUE, + MAP_CPUMAP_KTHREAD, + MAP_EXCEPTION, + MAP_DEVMAP_XMIT, + MAP_DEVMAP_XMIT_MULTI, + NUM_MAP, +}; + +enum log_level { + LL_DEFAULT = 1U << 0, + LL_SIMPLE = 1U << 1, + LL_DEBUG = 1U << 2, +}; + +struct record { + __u64 timestamp; + struct datarec total; + struct datarec *cpu; +}; + +struct map_entry { + struct hlist_node node; + __u64 pair; + struct record val; +}; + +struct stats_record { + struct record rx_cnt; + struct record redir_err[XDP_REDIRECT_ERR_MAX]; + struct record kthread; + struct record exception[XDP_ACTION_MAX]; + struct record devmap_xmit; + DECLARE_HASHTABLE(xmit_map, 5); + struct record enq[]; +}; + +struct sample_output { + struct { + __u64 rx; + __u64 redir; + __u64 drop; + __u64 drop_xmit; + __u64 err; + __u64 xmit; + } totals; + struct { + union { + __u64 pps; + __u64 num; + }; + __u64 drop; + __u64 err; + } rx_cnt; + struct { + __u64 suc; + __u64 err; + } redir_cnt; + struct { + __u64 hits; + } except_cnt; + struct { + __u64 pps; + __u64 drop; + __u64 err; + double bavg; + } xmit_cnt; +}; + +struct xdp_desc { + int ifindex; + __u32 prog_id; + int flags; +} sample_xdp_progs[32]; + +struct datarec *sample_mmap[NUM_MAP]; +struct bpf_map *sample_map[NUM_MAP]; +size_t sample_map_count[NUM_MAP]; +enum log_level sample_log_level; +struct sample_output sample_out; +unsigned long sample_interval; +bool sample_err_exp; +int sample_xdp_cnt; +int sample_n_cpus; +int sample_sig_fd; +int sample_mask; + +static const char *xdp_redirect_err_names[XDP_REDIRECT_ERR_MAX] = { + /* Key=1 keeps unknown errors */ + "Success", + "Unknown", + "EINVAL", + "ENETDOWN", + "EMSGSIZE", + "EOPNOTSUPP", + "ENOSPC", +}; + +/* Keyed from Unknown */ +static const char *xdp_redirect_err_help[XDP_REDIRECT_ERR_MAX - 1] = { + "Unknown error", + "Invalid redirection", + "Device being redirected to is down", + "Packet length too large for device", + "Operation not supported", + "No space in ptr_ring of cpumap kthread", +}; + +static const char *xdp_action_names[XDP_ACTION_MAX] = { + [XDP_ABORTED] = "XDP_ABORTED", + [XDP_DROP] = "XDP_DROP", + [XDP_PASS] = "XDP_PASS", + [XDP_TX] = "XDP_TX", + [XDP_REDIRECT] = "XDP_REDIRECT", + [XDP_UNKNOWN] = "XDP_UNKNOWN", +}; + +static __u64 gettime(void) +{ + struct timespec t; + int res; + + res = clock_gettime(CLOCK_MONOTONIC, &t); + if (res < 0) { + fprintf(stderr, "Error with gettimeofday! (%i)\n", res); + return UINT64_MAX; + } + return (__u64)t.tv_sec * NANOSEC_PER_SEC + t.tv_nsec; +} + +static const char *action2str(int action) +{ + if (action < XDP_ACTION_MAX) + return xdp_action_names[action]; + return NULL; +} + +static void sample_print_help(int mask) +{ + printf("Output format description\n\n" + "By default, redirect success statistics are disabled, use -s to enable.\n" + "The terse output mode is default, verbose mode can be activated using -v\n" + "Use SIGQUIT (Ctrl + \\) to switch the mode dynamically at runtime\n\n" + "Terse mode displays at most the following fields:\n" + " rx/s Number of packets received per second\n" + " redir/s Number of packets successfully redirected per second\n" + " err,drop/s Aggregated count of errors per second (including dropped packets)\n" + " xmit/s Number of packets transmitted on the output device per second\n\n" + "Output description for verbose mode:\n" + " FIELD DESCRIPTION\n"); + + if (mask & SAMPLE_RX_CNT) { + printf(" receive\t\tDisplays the number of packets received & errors encountered\n" + " \t\t\tWhenever an error or packet drop occurs, details of per CPU error\n" + " \t\t\tand drop statistics will be expanded inline in terse mode.\n" + " \t\t\t\tpkt/s - Packets received per second\n" + " \t\t\t\tdrop/s - Packets dropped per second\n" + " \t\t\t\terror/s - Errors encountered per second\n\n"); + } + if (mask & (SAMPLE_REDIRECT_CNT | SAMPLE_REDIRECT_ERR_CNT)) { + printf(" redirect\t\tDisplays the number of packets successfully redirected\n" + " \t\t\tErrors encountered are expanded under redirect_err field\n" + " \t\t\tNote that passing -s to enable it has a per packet overhead\n" + " \t\t\t\tredir/s - Packets redirected successfully per second\n\n" + " redirect_err\t\tDisplays the number of packets that failed redirection\n" + " \t\t\tThe errno is expanded under this field with per CPU count\n" + " \t\t\tThe recognized errors are:\n"); + + for (int i = 2; i < XDP_REDIRECT_ERR_MAX; i++) + printf("\t\t\t %s: %s\n", xdp_redirect_err_names[i], + xdp_redirect_err_help[i - 1]); + + printf(" \n\t\t\t\terror/s - Packets that failed redirection per second\n\n"); + } + + if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT) { + printf(" enqueue to cpu N\tDisplays the number of packets enqueued to bulk queue of CPU N\n" + " \t\t\tExpands to cpu:FROM->N to display enqueue stats for each CPU enqueuing to CPU N\n" + " \t\t\tReceived packets can be associated with the CPU redirect program is enqueuing \n" + " \t\t\tpackets to.\n" + " \t\t\t\tpkt/s - Packets enqueued per second from other CPU to CPU N\n" + " \t\t\t\tdrop/s - Packets dropped when trying to enqueue to CPU N\n" + " \t\t\t\tbulk-avg - Average number of packets processed for each event\n\n"); + } + + if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) { + printf(" kthread\t\tDisplays the number of packets processed in CPUMAP kthread for each CPU\n" + " \t\t\tPackets consumed from ptr_ring in kthread, and its xdp_stats (after calling \n" + " \t\t\tCPUMAP bpf prog) are expanded below this. xdp_stats are expanded as a total and\n" + " \t\t\tthen per-CPU to associate it to each CPU's pinned CPUMAP kthread.\n" + " \t\t\t\tpkt/s - Packets consumed per second from ptr_ring\n" + " \t\t\t\tdrop/s - Packets dropped per second in kthread\n" + " \t\t\t\tsched - Number of times kthread called schedule()\n\n" + " \t\t\txdp_stats (also expands to per-CPU counts)\n" + " \t\t\t\tpass/s - XDP_PASS count for CPUMAP program execution\n" + " \t\t\t\tdrop/s - XDP_DROP count for CPUMAP program execution\n" + " \t\t\t\tredir/s - XDP_REDIRECT count for CPUMAP program execution\n\n"); + } + + if (mask & SAMPLE_EXCEPTION_CNT) { + printf(" xdp_exception\t\tDisplays xdp_exception tracepoint events\n" + " \t\t\tThis can occur due to internal driver errors, unrecognized\n" + " \t\t\tXDP actions and due to explicit user trigger by use of XDP_ABORTED\n" + " \t\t\tEach action is expanded below this field with its count\n" + " \t\t\t\thit/s - Number of times the tracepoint was hit per second\n\n"); + } + + if (mask & SAMPLE_DEVMAP_XMIT_CNT) { + printf(" devmap_xmit\t\tDisplays devmap_xmit tracepoint events\n" + " \t\t\tThis tracepoint is invoked for successful transmissions on output\n" + " \t\t\tdevice but these statistics are not available for generic XDP mode,\n" + " \t\t\thence they will be omitted from the output when using SKB mode\n" + " \t\t\t\txmit/s - Number of packets that were transmitted per second\n" + " \t\t\t\tdrop/s - Number of packets that failed transmissions per second\n" + " \t\t\t\tdrv_err/s - Number of internal driver errors per second\n" + " \t\t\t\tbulk-avg - Average number of packets processed for each event\n\n"); + } +} + +void sample_usage(char *argv[], const struct option *long_options, + const char *doc, int mask, bool error) +{ + int i; + + if (!error) + sample_print_help(mask); + + printf("\n%s\nOption for %s:\n", doc, argv[0]); + for (i = 0; long_options[i].name != 0; i++) { + printf(" --%-15s", long_options[i].name); + if (long_options[i].flag != NULL) + printf(" flag (internal value: %d)", + *long_options[i].flag); + else + printf("\t short-option: -%c", long_options[i].val); + printf("\n"); + } + printf("\n"); +} + +static struct datarec *alloc_record_per_cpu(void) +{ + unsigned int nr_cpus = libbpf_num_possible_cpus(); + struct datarec *array; + + array = calloc(nr_cpus, sizeof(*array)); + if (!array) { + fprintf(stderr, "Failed to allocate memory (nr_cpus: %u)\n", + nr_cpus); + return NULL; + } + return array; +} + +static int map_entry_init(struct map_entry *e, __u64 pair) +{ + e->pair = pair; + INIT_HLIST_NODE(&e->node); + e->val.timestamp = gettime(); + e->val.cpu = alloc_record_per_cpu(); + if (!e->val.cpu) + return -ENOMEM; + return 0; +} + +static void map_collect_percpu(struct datarec *values, struct record *rec) +{ + /* For percpu maps, userspace gets a value per possible CPU */ + unsigned int nr_cpus = libbpf_num_possible_cpus(); + __u64 sum_xdp_redirect = 0; + __u64 sum_processed = 0; + __u64 sum_xdp_pass = 0; + __u64 sum_xdp_drop = 0; + __u64 sum_dropped = 0; + __u64 sum_issue = 0; + int i; + + /* Get time as close as possible to reading map contents */ + rec->timestamp = gettime(); + + /* Record and sum values from each CPU */ + for (i = 0; i < nr_cpus; i++) { + rec->cpu[i].processed = READ_ONCE(values[i].processed); + rec->cpu[i].dropped = READ_ONCE(values[i].dropped); + rec->cpu[i].issue = READ_ONCE(values[i].issue); + rec->cpu[i].xdp_pass = READ_ONCE(values[i].xdp_pass); + rec->cpu[i].xdp_drop = READ_ONCE(values[i].xdp_drop); + rec->cpu[i].xdp_redirect = READ_ONCE(values[i].xdp_redirect); + + sum_processed += rec->cpu[i].processed; + sum_dropped += rec->cpu[i].dropped; + sum_issue += rec->cpu[i].issue; + sum_xdp_pass += rec->cpu[i].xdp_pass; + sum_xdp_drop += rec->cpu[i].xdp_drop; + sum_xdp_redirect += rec->cpu[i].xdp_redirect; + } + + rec->total.processed = sum_processed; + rec->total.dropped = sum_dropped; + rec->total.issue = sum_issue; + rec->total.xdp_pass = sum_xdp_pass; + rec->total.xdp_drop = sum_xdp_drop; + rec->total.xdp_redirect = sum_xdp_redirect; +} + +static int map_collect_percpu_devmap(int map_fd, struct stats_record *rec) +{ + unsigned int nr_cpus = bpf_num_possible_cpus(); + __u32 batch, count = 32; + struct datarec *values; + bool init = false; + __u64 *keys; + int i, ret; + + keys = calloc(count, sizeof(__u64)); + if (!keys) + return -ENOMEM; + values = calloc(count * nr_cpus, sizeof(struct datarec)); + if (!values) { + free(keys); + return -ENOMEM; + } + + for (;;) { + bool exit = false; + + ret = bpf_map_lookup_batch(map_fd, init ? &batch : NULL, &batch, + keys, values, &count, NULL); + if (ret < 0 && errno != ENOENT) + break; + if (errno == ENOENT) + exit = true; + + init = true; + for (i = 0; i < count; i++) { + struct map_entry *e, *x = NULL; + __u64 pair = keys[i]; + struct datarec *arr; + + arr = &values[i * nr_cpus]; + hash_for_each_possible(rec->xmit_map, e, node, pair) { + if (e->pair == pair) { + x = e; + break; + } + } + if (!x) { + x = calloc(1, sizeof(*x)); + if (!x) + goto cleanup; + if (map_entry_init(x, pair) < 0) { + free(x); + goto cleanup; + } + hash_add(rec->xmit_map, &x->node, pair); + } + map_collect_percpu(arr, &x->val); + } + + if (exit) + break; + count = 32; + } + + free(values); + free(keys); + return 0; +cleanup: + free(values); + free(keys); + return -ENOMEM; +} + +static struct stats_record *alloc_stats_record(void) +{ + struct stats_record *rec; + int i; + + rec = calloc(1, sizeof(*rec) + sample_n_cpus * sizeof(struct record)); + if (!rec) { + fprintf(stderr, "Failed to allocate memory\n"); + return NULL; + } + + if (sample_mask & SAMPLE_RX_CNT) { + rec->rx_cnt.cpu = alloc_record_per_cpu(); + if (!rec->rx_cnt.cpu) { + fprintf(stderr, + "Failed to allocate rx_cnt per-CPU array\n"); + goto end_rec; + } + } + if (sample_mask & (SAMPLE_REDIRECT_CNT | SAMPLE_REDIRECT_ERR_CNT)) { + for (i = 0; i < XDP_REDIRECT_ERR_MAX; i++) { + rec->redir_err[i].cpu = alloc_record_per_cpu(); + if (!rec->redir_err[i].cpu) { + fprintf(stderr, + "Failed to allocate redir_err per-CPU array for " + "\"%s\" case\n", + xdp_redirect_err_names[i]); + while (i--) + free(rec->redir_err[i].cpu); + goto end_rx_cnt; + } + } + } + if (sample_mask & SAMPLE_CPUMAP_KTHREAD_CNT) { + rec->kthread.cpu = alloc_record_per_cpu(); + if (!rec->kthread.cpu) { + fprintf(stderr, + "Failed to allocate kthread per-CPU array\n"); + goto end_redir; + } + } + if (sample_mask & SAMPLE_EXCEPTION_CNT) { + for (i = 0; i < XDP_ACTION_MAX; i++) { + rec->exception[i].cpu = alloc_record_per_cpu(); + if (!rec->exception[i].cpu) { + fprintf(stderr, + "Failed to allocate exception per-CPU array for " + "\"%s\" case\n", + action2str(i)); + while (i--) + free(rec->exception[i].cpu); + goto end_kthread; + } + } + } + if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT) { + rec->devmap_xmit.cpu = alloc_record_per_cpu(); + if (!rec->devmap_xmit.cpu) { + fprintf(stderr, + "Failed to allocate devmap_xmit per-CPU array\n"); + goto end_exception; + } + } + if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) + hash_init(rec->xmit_map); + if (sample_mask & SAMPLE_CPUMAP_ENQUEUE_CNT) { + for (i = 0; i < sample_n_cpus; i++) { + rec->enq[i].cpu = alloc_record_per_cpu(); + if (!rec->enq[i].cpu) { + fprintf(stderr, + "Failed to allocate enqueue per-CPU array for " + "CPU %d\n", + i); + while (i--) + free(rec->enq[i].cpu); + goto end_devmap_xmit; + } + } + } + + return rec; + +end_devmap_xmit: + free(rec->devmap_xmit.cpu); +end_exception: + for (i = 0; i < XDP_ACTION_MAX; i++) + free(rec->exception[i].cpu); +end_kthread: + free(rec->kthread.cpu); +end_redir: + for (i = 0; i < XDP_REDIRECT_ERR_MAX; i++) + free(rec->redir_err[i].cpu); +end_rx_cnt: + free(rec->rx_cnt.cpu); +end_rec: + free(rec); + return NULL; +} + +static void free_stats_record(struct stats_record *r) +{ + struct hlist_node *tmp; + struct map_entry *e; + int i; + + for (i = 0; i < sample_n_cpus; i++) + free(r->enq[i].cpu); + hash_for_each_safe(r->xmit_map, i, tmp, e, node) { + hash_del(&e->node); + free(e->val.cpu); + free(e); + } + free(r->devmap_xmit.cpu); + for (i = 0; i < XDP_ACTION_MAX; i++) + free(r->exception[i].cpu); + free(r->kthread.cpu); + for (i = 0; i < XDP_REDIRECT_ERR_MAX; i++) + free(r->redir_err[i].cpu); + free(r->rx_cnt.cpu); + free(r); +} + +static double calc_period(struct record *r, struct record *p) +{ + double period_ = 0; + __u64 period = 0; + + period = r->timestamp - p->timestamp; + if (period > 0) + period_ = ((double)period / NANOSEC_PER_SEC); + + return period_; +} + +static double sample_round(double val) +{ + if (val - floor(val) < 0.5) + return floor(val); + return ceil(val); +} + +static __u64 calc_pps(struct datarec *r, struct datarec *p, double period_) +{ + __u64 packets = 0; + __u64 pps = 0; + + if (period_ > 0) { + packets = r->processed - p->processed; + pps = sample_round(packets / period_); + } + return pps; +} + +static __u64 calc_drop_pps(struct datarec *r, struct datarec *p, double period_) +{ + __u64 packets = 0; + __u64 pps = 0; + + if (period_ > 0) { + packets = r->dropped - p->dropped; + pps = sample_round(packets / period_); + } + return pps; +} + +static __u64 calc_errs_pps(struct datarec *r, struct datarec *p, double period_) +{ + __u64 packets = 0; + __u64 pps = 0; + + if (period_ > 0) { + packets = r->issue - p->issue; + pps = sample_round(packets / period_); + } + return pps; +} + +static __u64 calc_info_pps(struct datarec *r, struct datarec *p, double period_) +{ + __u64 packets = 0; + __u64 pps = 0; + + if (period_ > 0) { + packets = r->info - p->info; + pps = sample_round(packets / period_); + } + return pps; +} + +static void calc_xdp_pps(struct datarec *r, struct datarec *p, double *xdp_pass, + double *xdp_drop, double *xdp_redirect, double period_) +{ + *xdp_pass = 0, *xdp_drop = 0, *xdp_redirect = 0; + if (period_ > 0) { + *xdp_redirect = (r->xdp_redirect - p->xdp_redirect) / period_; + *xdp_pass = (r->xdp_pass - p->xdp_pass) / period_; + *xdp_drop = (r->xdp_drop - p->xdp_drop) / period_; + } +} + +static void stats_get_rx_cnt(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, struct sample_output *out) +{ + struct record *rec, *prev; + double t, pps, drop, err; + int i; + + rec = &stats_rec->rx_cnt; + prev = &stats_prev->rx_cnt; + t = calc_period(rec, prev); + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + drop = calc_drop_pps(r, p, t); + err = calc_errs_pps(r, p, t); + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-18s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + "\n", + str, PPS(pps), DROP(drop), ERR(err)); + } + + if (out) { + pps = calc_pps(&rec->total, &prev->total, t); + drop = calc_drop_pps(&rec->total, &prev->total, t); + err = calc_errs_pps(&rec->total, &prev->total, t); + + out->rx_cnt.pps = pps; + out->rx_cnt.drop = drop; + out->rx_cnt.err = err; + out->totals.rx += pps; + out->totals.drop += drop; + out->totals.err += err; + } +} + +static void stats_get_cpumap_enqueue(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus) +{ + struct record *rec, *prev; + double t, pps, drop, err; + int i, to_cpu; + + /* cpumap enqueue stats */ + for (to_cpu = 0; to_cpu < sample_n_cpus; to_cpu++) { + rec = &stats_rec->enq[to_cpu]; + prev = &stats_prev->enq[to_cpu]; + t = calc_period(rec, prev); + + pps = calc_pps(&rec->total, &prev->total, t); + drop = calc_drop_pps(&rec->total, &prev->total, t); + err = calc_errs_pps(&rec->total, &prev->total, t); + + if (pps > 0 || drop > 0) { + char str[64]; + + snprintf(str, sizeof(str), "enqueue to cpu %d", to_cpu); + + if (err > 0) + err = pps / err; /* calc average bulk size */ + + print_err(drop, + " %-20s " FMT_COLUMNf FMT_COLUMNf __COLUMN( + ".2f") "\n", + str, PPS(pps), DROP(drop), err, "bulk-avg"); + } + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + drop = calc_drop_pps(r, p, t); + err = calc_errs_pps(r, p, t); + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d->%d", i, to_cpu); + if (err > 0) + err = pps / err; /* calc average bulk size */ + print_default( + " %-18s " FMT_COLUMNf FMT_COLUMNf __COLUMN( + ".2f") "\n", + str, PPS(pps), DROP(drop), err, "bulk-avg"); + } + } +} + +static void stats_get_cpumap_remote(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus) +{ + double xdp_pass, xdp_drop, xdp_redirect; + struct record *rec, *prev; + double t; + int i; + + rec = &stats_rec->kthread; + prev = &stats_prev->kthread; + t = calc_period(rec, prev); + + calc_xdp_pps(&rec->total, &prev->total, &xdp_pass, &xdp_drop, + &xdp_redirect, t); + if (xdp_pass || xdp_drop || xdp_redirect) { + print_err(xdp_drop, + " %-18s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf "\n", + "xdp_stats", PASS(xdp_pass), DROP(xdp_drop), + REDIR(xdp_redirect)); + } + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + calc_xdp_pps(r, p, &xdp_pass, &xdp_drop, &xdp_redirect, t); + if (!xdp_pass && !xdp_drop && !xdp_redirect) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-16s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + "\n", + str, PASS(xdp_pass), DROP(xdp_drop), + REDIR(xdp_redirect)); + } +} + +static void stats_get_cpumap_kthread(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus) +{ + struct record *rec, *prev; + double t, pps, drop, err; + int i; + + rec = &stats_rec->kthread; + prev = &stats_prev->kthread; + t = calc_period(rec, prev); + + pps = calc_pps(&rec->total, &prev->total, t); + drop = calc_drop_pps(&rec->total, &prev->total, t); + err = calc_errs_pps(&rec->total, &prev->total, t); + + print_err(drop, " %-20s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf "\n", + pps ? "kthread total" : "kthread", PPS(pps), DROP(drop), err, + "sched"); + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + drop = calc_drop_pps(r, p, t); + err = calc_errs_pps(r, p, t); + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-18s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + "\n", + str, PPS(pps), DROP(drop), err, "sched"); + } +} + +static void stats_get_redirect_cnt(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out) +{ + struct record *rec, *prev; + double t, pps; + int i; + + rec = &stats_rec->redir_err[0]; + prev = &stats_prev->redir_err[0]; + t = calc_period(rec, prev); + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + if (!pps) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-18s " FMT_COLUMNf "\n", str, REDIR(pps)); + } + + if (out) { + pps = calc_pps(&rec->total, &prev->total, t); + out->redir_cnt.suc = pps; + out->totals.redir += pps; + } +} + +static void stats_get_redirect_err_cnt(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out) +{ + struct record *rec, *prev; + double t, drop, sum = 0; + int rec_i, i; + + for (rec_i = 1; rec_i < XDP_REDIRECT_ERR_MAX; rec_i++) { + char str[64]; + + rec = &stats_rec->redir_err[rec_i]; + prev = &stats_prev->redir_err[rec_i]; + t = calc_period(rec, prev); + + drop = calc_drop_pps(&rec->total, &prev->total, t); + if (drop > 0 && !out) { + snprintf(str, sizeof(str), + sample_log_level & LL_DEFAULT ? "%s total" : + "%s", + xdp_redirect_err_names[rec_i]); + print_err(drop, " %-18s " FMT_COLUMNf "\n", str, + ERR(drop)); + } + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + double drop; + + drop = calc_drop_pps(r, p, t); + if (!drop) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-16s" FMT_COLUMNf "\n", str, + ERR(drop)); + } + + sum += drop; + } + + if (out) { + out->redir_cnt.err = sum; + out->totals.err += sum; + } +} + +static void stats_get_exception_cnt(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out) +{ + double t, drop, sum = 0; + struct record *rec, *prev; + int rec_i, i; + + for (rec_i = 0; rec_i < XDP_ACTION_MAX; rec_i++) { + rec = &stats_rec->exception[rec_i]; + prev = &stats_prev->exception[rec_i]; + t = calc_period(rec, prev); + + drop = calc_drop_pps(&rec->total, &prev->total, t); + /* Fold out errors after heading */ + sum += drop; + + if (drop > 0 && !out) { + print_always(" %-18s " FMT_COLUMNf "\n", + action2str(rec_i), ERR(drop)); + + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + double drop; + + drop = calc_drop_pps(r, p, t); + if (!drop) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + print_default(" %-16s" FMT_COLUMNf "\n", + str, ERR(drop)); + } + } + } + + if (out) { + out->except_cnt.hits = sum; + out->totals.err += sum; + } +} + +static void stats_get_devmap_xmit(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out) +{ + double pps, drop, info, err; + struct record *rec, *prev; + double t; + int i; + + rec = &stats_rec->devmap_xmit; + prev = &stats_prev->devmap_xmit; + t = calc_period(rec, prev); + for (i = 0; i < nr_cpus; i++) { + struct datarec *r = &rec->cpu[i]; + struct datarec *p = &prev->cpu[i]; + char str[64]; + + pps = calc_pps(r, p, t); + drop = calc_drop_pps(r, p, t); + err = calc_errs_pps(r, p, t); + + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + info = calc_info_pps(r, p, t); + if (info > 0) + info = (pps + drop) / info; /* calc avg bulk */ + print_default(" %-18s" FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + __COLUMN(".2f") "\n", + str, XMIT(pps), DROP(drop), err, "drv_err/s", + info, "bulk-avg"); + } + if (out) { + pps = calc_pps(&rec->total, &prev->total, t); + drop = calc_drop_pps(&rec->total, &prev->total, t); + info = calc_info_pps(&rec->total, &prev->total, t); + if (info > 0) + info = (pps + drop) / info; /* calc avg bulk */ + err = calc_errs_pps(&rec->total, &prev->total, t); + + out->xmit_cnt.pps = pps; + out->xmit_cnt.drop = drop; + out->xmit_cnt.bavg = info; + out->xmit_cnt.err = err; + out->totals.xmit += pps; + out->totals.drop_xmit += drop; + out->totals.err += err; + } +} + +static void stats_get_devmap_xmit_multi(struct stats_record *stats_rec, + struct stats_record *stats_prev, + unsigned int nr_cpus, + struct sample_output *out, + bool xmit_total) +{ + double pps, drop, info, err; + struct map_entry *entry; + struct record *r, *p; + double t; + int bkt; + + hash_for_each(stats_rec->xmit_map, bkt, entry, node) { + struct map_entry *e, *x = NULL; + char ifname_from[IFNAMSIZ]; + char ifname_to[IFNAMSIZ]; + const char *fstr, *tstr; + unsigned long prev_time; + struct record beg = {}; + __u32 from_idx, to_idx; + char str[128]; + __u64 pair; + int i; + + prev_time = sample_interval * NANOSEC_PER_SEC; + + pair = entry->pair; + from_idx = pair >> 32; + to_idx = pair & 0xFFFFFFFF; + + r = &entry->val; + beg.timestamp = r->timestamp - prev_time; + + /* Find matching entry from stats_prev map */ + hash_for_each_possible(stats_prev->xmit_map, e, node, pair) { + if (e->pair == pair) { + x = e; + break; + } + } + if (x) + p = &x->val; + else + p = &beg; + t = calc_period(r, p); + pps = calc_pps(&r->total, &p->total, t); + drop = calc_drop_pps(&r->total, &p->total, t); + info = calc_info_pps(&r->total, &p->total, t); + if (info > 0) + info = (pps + drop) / info; /* calc avg bulk */ + err = calc_errs_pps(&r->total, &p->total, t); + + if (out) { + /* We are responsible for filling out totals */ + out->totals.xmit += pps; + out->totals.drop_xmit += drop; + out->totals.err += err; + continue; + } + + fstr = tstr = NULL; + if (if_indextoname(from_idx, ifname_from)) + fstr = ifname_from; + if (if_indextoname(to_idx, ifname_to)) + tstr = ifname_to; + + snprintf(str, sizeof(str), "xmit %s->%s", fstr ?: "?", + tstr ?: "?"); + /* Skip idle streams of redirection */ + if (pps || drop || err) { + print_err(drop, + " %-20s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + __COLUMN(".2f") "\n", str, XMIT(pps), DROP(drop), + err, "drv_err/s", info, "bulk-avg"); + } + + for (i = 0; i < nr_cpus; i++) { + struct datarec *rc = &r->cpu[i]; + struct datarec *pc, p_beg = {}; + char str[64]; + + pc = p == &beg ? &p_beg : &p->cpu[i]; + + pps = calc_pps(rc, pc, t); + drop = calc_drop_pps(rc, pc, t); + err = calc_errs_pps(rc, pc, t); + + if (!pps && !drop && !err) + continue; + + snprintf(str, sizeof(str), "cpu:%d", i); + info = calc_info_pps(rc, pc, t); + if (info > 0) + info = (pps + drop) / info; /* calc avg bulk */ + + print_default(" %-18s" FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf + __COLUMN(".2f") "\n", str, XMIT(pps), + DROP(drop), err, "drv_err/s", info, "bulk-avg"); + } + } +} + +static void stats_print(const char *prefix, int mask, struct stats_record *r, + struct stats_record *p, struct sample_output *out) +{ + int nr_cpus = libbpf_num_possible_cpus(); + const char *str; + + print_always("%-23s", prefix ?: "Summary"); + if (mask & SAMPLE_RX_CNT) + print_always(FMT_COLUMNl, RX(out->totals.rx)); + if (mask & SAMPLE_REDIRECT_CNT) + print_always(FMT_COLUMNl, REDIR(out->totals.redir)); + printf(FMT_COLUMNl, + out->totals.err + out->totals.drop + out->totals.drop_xmit, + "err,drop/s"); + if (mask & SAMPLE_DEVMAP_XMIT_CNT || + mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) + printf(FMT_COLUMNl, XMIT(out->totals.xmit)); + printf("\n"); + + if (mask & SAMPLE_RX_CNT) { + str = (sample_log_level & LL_DEFAULT) && out->rx_cnt.pps ? + "receive total" : + "receive"; + print_err((out->rx_cnt.err || out->rx_cnt.drop), + " %-20s " FMT_COLUMNl FMT_COLUMNl FMT_COLUMNl "\n", + str, PPS(out->rx_cnt.pps), DROP(out->rx_cnt.drop), + ERR(out->rx_cnt.err)); + + stats_get_rx_cnt(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT) + stats_get_cpumap_enqueue(r, p, nr_cpus); + + if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) { + stats_get_cpumap_kthread(r, p, nr_cpus); + stats_get_cpumap_remote(r, p, nr_cpus); + } + + if (mask & SAMPLE_REDIRECT_CNT) { + str = out->redir_cnt.suc ? "redirect total" : "redirect"; + print_default(" %-20s " FMT_COLUMNl "\n", str, + REDIR(out->redir_cnt.suc)); + + stats_get_redirect_cnt(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_REDIRECT_ERR_CNT) { + str = (sample_log_level & LL_DEFAULT) && out->redir_cnt.err ? + "redirect_err total" : + "redirect_err"; + print_err(out->redir_cnt.err, " %-20s " FMT_COLUMNl "\n", str, + ERR(out->redir_cnt.err)); + + stats_get_redirect_err_cnt(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_EXCEPTION_CNT) { + str = out->except_cnt.hits ? "xdp_exception total" : + "xdp_exception"; + + print_err(out->except_cnt.hits, " %-20s " FMT_COLUMNl "\n", str, + HITS(out->except_cnt.hits)); + + stats_get_exception_cnt(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_DEVMAP_XMIT_CNT) { + str = (sample_log_level & LL_DEFAULT) && out->xmit_cnt.pps ? + "devmap_xmit total" : + "devmap_xmit"; + + print_err(out->xmit_cnt.err || out->xmit_cnt.drop, + " %-20s " FMT_COLUMNl FMT_COLUMNl FMT_COLUMNl + __COLUMN(".2f") "\n", + str, XMIT(out->xmit_cnt.pps), + DROP(out->xmit_cnt.drop), out->xmit_cnt.err, + "drv_err/s", out->xmit_cnt.bavg, "bulk-avg"); + + stats_get_devmap_xmit(r, p, nr_cpus, NULL); + } + + if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) + stats_get_devmap_xmit_multi(r, p, nr_cpus, NULL, + mask & SAMPLE_DEVMAP_XMIT_CNT); + + if (sample_log_level & LL_DEFAULT || + ((sample_log_level & LL_SIMPLE) && sample_err_exp)) { + sample_err_exp = false; + printf("\n"); + } +} + +int sample_setup_maps(struct bpf_map **maps) +{ + sample_n_cpus = libbpf_num_possible_cpus(); + + for (int i = 0; i < MAP_DEVMAP_XMIT_MULTI; i++) { + sample_map[i] = maps[i]; + + switch (i) { + case MAP_RX: + case MAP_CPUMAP_KTHREAD: + case MAP_DEVMAP_XMIT: + sample_map_count[i] = sample_n_cpus; + break; + case MAP_REDIRECT_ERR: + sample_map_count[i] = + XDP_REDIRECT_ERR_MAX * sample_n_cpus; + break; + case MAP_EXCEPTION: + sample_map_count[i] = XDP_ACTION_MAX * sample_n_cpus; + case MAP_CPUMAP_ENQUEUE: + sample_map_count[i] = sample_n_cpus * sample_n_cpus; + break; + default: + return -EINVAL; + } + if (bpf_map__set_max_entries(sample_map[i], sample_map_count[i]) < 0) + return -errno; + } + sample_map[MAP_DEVMAP_XMIT_MULTI] = maps[MAP_DEVMAP_XMIT_MULTI]; + return 0; +} + +static int sample_setup_maps_mappings(void) +{ + for (int i = 0; i < MAP_DEVMAP_XMIT_MULTI; i++) { + size_t size = sample_map_count[i] * sizeof(struct datarec); + + sample_mmap[i] = mmap(NULL, size, PROT_READ | PROT_WRITE, + MAP_SHARED, bpf_map__fd(sample_map[i]), 0); + if (sample_mmap[i] == MAP_FAILED) + return -errno; + } + return 0; +} + +int __sample_init(int mask) +{ + sigset_t st; + + sigemptyset(&st); + sigaddset(&st, SIGQUIT); + sigaddset(&st, SIGINT); + sigaddset(&st, SIGTERM); + + if (sigprocmask(SIG_BLOCK, &st, NULL) < 0) + return -errno; + + sample_sig_fd = signalfd(-1, &st, SFD_CLOEXEC | SFD_NONBLOCK); + if (sample_sig_fd < 0) + return -errno; + + sample_mask = mask; + + return sample_setup_maps_mappings(); +} + +static int __sample_remove_xdp(int ifindex, __u32 prog_id, int xdp_flags) +{ + __u32 cur_prog_id = 0; + int ret; + + if (prog_id) { + ret = bpf_xdp_query_id(ifindex, xdp_flags, &cur_prog_id); + if (ret < 0) + return -errno; + + if (prog_id != cur_prog_id) { + print_always( + "Program on ifindex %d does not match installed " + "program, skipping unload\n", + ifindex); + return -ENOENT; + } + } + + return bpf_xdp_detach(ifindex, xdp_flags, NULL); +} + +int sample_install_xdp(struct bpf_program *xdp_prog, int ifindex, bool generic, + bool force) +{ + int ret, xdp_flags = 0; + __u32 prog_id = 0; + + if (sample_xdp_cnt == 32) { + fprintf(stderr, + "Total limit for installed XDP programs in a sample reached\n"); + return -ENOTSUP; + } + + xdp_flags |= !force ? XDP_FLAGS_UPDATE_IF_NOEXIST : 0; + xdp_flags |= generic ? XDP_FLAGS_SKB_MODE : XDP_FLAGS_DRV_MODE; + ret = bpf_xdp_attach(ifindex, bpf_program__fd(xdp_prog), xdp_flags, NULL); + if (ret < 0) { + ret = -errno; + fprintf(stderr, + "Failed to install program \"%s\" on ifindex %d, mode = %s, " + "force = %s: %s\n", + bpf_program__name(xdp_prog), ifindex, + generic ? "skb" : "native", force ? "true" : "false", + strerror(-ret)); + return ret; + } + + ret = bpf_xdp_query_id(ifindex, xdp_flags, &prog_id); + if (ret < 0) { + ret = -errno; + fprintf(stderr, + "Failed to get XDP program id for ifindex %d, removing program: %s\n", + ifindex, strerror(errno)); + __sample_remove_xdp(ifindex, 0, xdp_flags); + return ret; + } + sample_xdp_progs[sample_xdp_cnt++] = + (struct xdp_desc){ ifindex, prog_id, xdp_flags }; + + return 0; +} + +static void sample_summary_print(void) +{ + double num = sample_out.rx_cnt.num; + + if (sample_out.totals.rx) { + double pkts = sample_out.totals.rx; + + print_always(" Packets received : %'-10llu\n", + sample_out.totals.rx); + print_always(" Average packets/s : %'-10.0f\n", + sample_round(pkts / num)); + } + if (sample_out.totals.redir) { + double pkts = sample_out.totals.redir; + + print_always(" Packets redirected : %'-10llu\n", + sample_out.totals.redir); + print_always(" Average redir/s : %'-10.0f\n", + sample_round(pkts / num)); + } + if (sample_out.totals.drop) + print_always(" Rx dropped : %'-10llu\n", + sample_out.totals.drop); + if (sample_out.totals.drop_xmit) + print_always(" Tx dropped : %'-10llu\n", + sample_out.totals.drop_xmit); + if (sample_out.totals.err) + print_always(" Errors recorded : %'-10llu\n", + sample_out.totals.err); + if (sample_out.totals.xmit) { + double pkts = sample_out.totals.xmit; + + print_always(" Packets transmitted : %'-10llu\n", + sample_out.totals.xmit); + print_always(" Average transmit/s : %'-10.0f\n", + sample_round(pkts / num)); + } +} + +void sample_exit(int status) +{ + size_t size; + + for (int i = 0; i < NUM_MAP; i++) { + size = sample_map_count[i] * sizeof(**sample_mmap); + munmap(sample_mmap[i], size); + } + while (sample_xdp_cnt--) { + int i = sample_xdp_cnt, ifindex, xdp_flags; + __u32 prog_id; + + prog_id = sample_xdp_progs[i].prog_id; + ifindex = sample_xdp_progs[i].ifindex; + xdp_flags = sample_xdp_progs[i].flags; + + __sample_remove_xdp(ifindex, prog_id, xdp_flags); + } + sample_summary_print(); + close(sample_sig_fd); + exit(status); +} + +static int sample_stats_collect(struct stats_record *rec) +{ + int i; + + if (sample_mask & SAMPLE_RX_CNT) + map_collect_percpu(sample_mmap[MAP_RX], &rec->rx_cnt); + + if (sample_mask & SAMPLE_REDIRECT_CNT) + map_collect_percpu(sample_mmap[MAP_REDIRECT_ERR], &rec->redir_err[0]); + + if (sample_mask & SAMPLE_REDIRECT_ERR_CNT) { + for (i = 1; i < XDP_REDIRECT_ERR_MAX; i++) + map_collect_percpu(&sample_mmap[MAP_REDIRECT_ERR][i * sample_n_cpus], + &rec->redir_err[i]); + } + + if (sample_mask & SAMPLE_CPUMAP_ENQUEUE_CNT) + for (i = 0; i < sample_n_cpus; i++) + map_collect_percpu(&sample_mmap[MAP_CPUMAP_ENQUEUE][i * sample_n_cpus], + &rec->enq[i]); + + if (sample_mask & SAMPLE_CPUMAP_KTHREAD_CNT) + map_collect_percpu(sample_mmap[MAP_CPUMAP_KTHREAD], + &rec->kthread); + + if (sample_mask & SAMPLE_EXCEPTION_CNT) + for (i = 0; i < XDP_ACTION_MAX; i++) + map_collect_percpu(&sample_mmap[MAP_EXCEPTION][i * sample_n_cpus], + &rec->exception[i]); + + if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT) + map_collect_percpu(sample_mmap[MAP_DEVMAP_XMIT], &rec->devmap_xmit); + + if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) { + if (map_collect_percpu_devmap(bpf_map__fd(sample_map[MAP_DEVMAP_XMIT_MULTI]), rec) < 0) + return -EINVAL; + } + return 0; +} + +static void sample_summary_update(struct sample_output *out) +{ + sample_out.totals.rx += out->totals.rx; + sample_out.totals.redir += out->totals.redir; + sample_out.totals.drop += out->totals.drop; + sample_out.totals.drop_xmit += out->totals.drop_xmit; + sample_out.totals.err += out->totals.err; + sample_out.totals.xmit += out->totals.xmit; + sample_out.rx_cnt.num++; +} + +static void sample_stats_print(int mask, struct stats_record *cur, + struct stats_record *prev, char *prog_name) +{ + struct sample_output out = {}; + + if (mask & SAMPLE_RX_CNT) + stats_get_rx_cnt(cur, prev, 0, &out); + if (mask & SAMPLE_REDIRECT_CNT) + stats_get_redirect_cnt(cur, prev, 0, &out); + if (mask & SAMPLE_REDIRECT_ERR_CNT) + stats_get_redirect_err_cnt(cur, prev, 0, &out); + if (mask & SAMPLE_EXCEPTION_CNT) + stats_get_exception_cnt(cur, prev, 0, &out); + if (mask & SAMPLE_DEVMAP_XMIT_CNT) + stats_get_devmap_xmit(cur, prev, 0, &out); + else if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) + stats_get_devmap_xmit_multi(cur, prev, 0, &out, + mask & SAMPLE_DEVMAP_XMIT_CNT); + sample_summary_update(&out); + + stats_print(prog_name, mask, cur, prev, &out); +} + +void sample_switch_mode(void) +{ + sample_log_level ^= LL_DEBUG - 1; +} + +static int sample_signal_cb(void) +{ + struct signalfd_siginfo si; + int r; + + r = read(sample_sig_fd, &si, sizeof(si)); + if (r < 0) + return -errno; + + switch (si.ssi_signo) { + case SIGQUIT: + sample_switch_mode(); + printf("\n"); + break; + default: + printf("\n"); + return 1; + } + + return 0; +} + +/* Pointer swap trick */ +static void swap(struct stats_record **a, struct stats_record **b) +{ + struct stats_record *tmp; + + tmp = *a; + *a = *b; + *b = tmp; +} + +static int sample_timer_cb(int timerfd, struct stats_record **rec, + struct stats_record **prev) +{ + char line[64] = "Summary"; + int ret; + __u64 t; + + ret = read(timerfd, &t, sizeof(t)); + if (ret < 0) + return -errno; + + swap(prev, rec); + ret = sample_stats_collect(*rec); + if (ret < 0) + return ret; + + if (sample_xdp_cnt == 2 && !(sample_mask & SAMPLE_SKIP_HEADING)) { + char fi[IFNAMSIZ]; + char to[IFNAMSIZ]; + const char *f, *t; + + f = t = NULL; + if (if_indextoname(sample_xdp_progs[0].ifindex, fi)) + f = fi; + if (if_indextoname(sample_xdp_progs[1].ifindex, to)) + t = to; + + snprintf(line, sizeof(line), "%s->%s", f ?: "?", t ?: "?"); + } + + sample_stats_print(sample_mask, *rec, *prev, line); + return 0; +} + +int sample_run(int interval, void (*post_cb)(void *), void *ctx) +{ + struct timespec ts = { interval, 0 }; + struct itimerspec its = { ts, ts }; + struct stats_record *rec, *prev; + struct pollfd pfd[2] = {}; + int timerfd, ret; + + if (!interval) { + fprintf(stderr, "Incorrect interval 0\n"); + return -EINVAL; + } + sample_interval = interval; + /* Pretty print numbers */ + setlocale(LC_NUMERIC, "en_US.UTF-8"); + + timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK); + if (timerfd < 0) + return -errno; + timerfd_settime(timerfd, 0, &its, NULL); + + pfd[0].fd = sample_sig_fd; + pfd[0].events = POLLIN; + + pfd[1].fd = timerfd; + pfd[1].events = POLLIN; + + ret = -ENOMEM; + rec = alloc_stats_record(); + if (!rec) + goto end; + prev = alloc_stats_record(); + if (!prev) + goto end_rec; + + ret = sample_stats_collect(rec); + if (ret < 0) + goto end_rec_prev; + + for (;;) { + ret = poll(pfd, 2, -1); + if (ret < 0) { + if (errno == EINTR) + continue; + else + break; + } + + if (pfd[0].revents & POLLIN) + ret = sample_signal_cb(); + else if (pfd[1].revents & POLLIN) + ret = sample_timer_cb(timerfd, &rec, &prev); + + if (ret) + break; + + if (post_cb) + post_cb(ctx); + } + +end_rec_prev: + free_stats_record(prev); +end_rec: + free_stats_record(rec); +end: + close(timerfd); + + return ret; +} + +const char *get_driver_name(int ifindex) +{ + struct ethtool_drvinfo drv = {}; + char ifname[IF_NAMESIZE]; + static char drvname[32]; + struct ifreq ifr = {}; + int fd, r = 0; + + fd = socket(AF_INET, SOCK_DGRAM, 0); + if (fd < 0) + return "[error]"; + + if (!if_indextoname(ifindex, ifname)) + goto end; + + drv.cmd = ETHTOOL_GDRVINFO; + safe_strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + ifr.ifr_data = (void *)&drv; + + r = ioctl(fd, SIOCETHTOOL, &ifr); + if (r) + goto end; + + safe_strncpy(drvname, drv.driver, sizeof(drvname)); + + close(fd); + return drvname; + +end: + r = errno; + close(fd); + return r == EOPNOTSUPP ? "loopback" : "[error]"; +} + +int get_mac_addr(int ifindex, void *mac_addr) +{ + char ifname[IF_NAMESIZE]; + struct ifreq ifr = {}; + int fd, r; + + fd = socket(AF_INET, SOCK_DGRAM, 0); + if (fd < 0) + return -errno; + + if (!if_indextoname(ifindex, ifname)) { + r = -errno; + goto end; + } + + safe_strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name)); + + r = ioctl(fd, SIOCGIFHWADDR, &ifr); + if (r) { + r = -errno; + goto end; + } + + memcpy(mac_addr, ifr.ifr_hwaddr.sa_data, 6 * sizeof(char)); + +end: + close(fd); + return r; +} + +__attribute__((constructor)) static void sample_ctor(void) +{ + if (libbpf_set_strict_mode(LIBBPF_STRICT_ALL) < 0) { + fprintf(stderr, "Failed to set libbpf strict mode: %s\n", + strerror(errno)); + /* Just exit, nothing to cleanup right now */ + exit(EXIT_FAIL_BPF); + } +} |