Adding upstream version 2.36.1.upstream/2.36.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 341 insertions, 0 deletions

diff --git a/sys-utils/irqtop.c b/sys-utils/irqtop.c
new file mode 100644
index 0000000..4363fff
--- /dev/null
+++ b/sys-utils/irqtop.c
@@ -0,0 +1,341 @@
+/*
+ * irqtop.c - utility to display kernel interrupt information.
+ *
+ * Copyright (C) 2019 zhenwei pi <pizhenwei@bytedance.com>
+ * Copyright (C) 2020 Karel Zak <kzak@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+#include <ctype.h>
+#include <errno.h>
+#include <getopt.h>
+#include <limits.h>
+#include <locale.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/epoll.h>
+#include <sys/ioctl.h>
+#include <sys/select.h>
+#include <sys/signalfd.h>
+#include <sys/time.h>
+#include <sys/timerfd.h>
+#include <sys/types.h>
+#include <termios.h>
+#include <unistd.h>
+
+#ifdef HAVE_SLCURSES_H
+# include <slcurses.h>
+#elif defined(HAVE_SLANG_SLCURSES_H)
+# include <slang/slcurses.h>
+#elif defined(HAVE_NCURSESW_NCURSES_H) && defined(HAVE_WIDECHAR)
+# include <ncursesw/ncurses.h>
+#elif defined(HAVE_NCURSES_H)
+# include <ncurses.h>
+#elif defined(HAVE_NCURSES_NCURSES_H)
+# include <ncurses/ncurses.h>
+#endif
+
+#ifdef HAVE_WIDECHAR
+# include <wctype.h>
+# include <wchar.h>
+#endif
+
+#include <libsmartcols.h>
+
+#include "closestream.h"
+#include "monotonic.h"
+#include "pathnames.h"
+#include "strutils.h"
+#include "timeutils.h"
+#include "ttyutils.h"
+#include "xalloc.h"
+
+#include "irq-common.h"
+
+#define MAX_EVENTS	3
+
+/* top control struct */
+struct irqtop_ctl {
+	WINDOW		*win;
+	int		cols;
+	int		rows;
+	char		*hostname;
+
+	struct itimerspec timer;
+	struct irq_stat	*prev_stat;
+
+	unsigned int request_exit:1;
+};
+
+/* user's input parser */
+static void parse_input(struct irqtop_ctl *ctl, struct irq_output *out, char c)
+{
+	switch (c) {
+	case 'q':
+	case 'Q':
+		ctl->request_exit = 1;
+		break;
+	default:
+		set_sort_func_by_key(out, c);
+		break;
+	}
+}
+
+static int update_screen(struct irqtop_ctl *ctl, struct irq_output *out)
+{
+	struct libscols_table *table;
+	struct irq_stat *stat;
+	time_t now = time(NULL);
+	char timestr[64], *data;
+
+	table = get_scols_table(out, ctl->prev_stat, &stat);
+	if (!table) {
+		ctl->request_exit = 1;
+		return 1;
+	}
+
+	/* header in interactive mode */
+	move(0, 0);
+	strtime_iso(&now, ISO_TIMESTAMP, timestr, sizeof(timestr));
+	wprintw(ctl->win, _("irqtop | total: %ld delta: %ld | %s | %s\n\n"),
+			   stat->total_irq, stat->delta_irq, ctl->hostname, timestr);
+
+	scols_print_table_to_string(table, &data);
+	wprintw(ctl->win, "%s", data);
+	free(data);
+
+	/* clean up */
+	scols_unref_table(table);
+	if (ctl->prev_stat)
+		free_irqstat(ctl->prev_stat);
+	ctl->prev_stat = stat;
+	return 0;
+}
+
+static int event_loop(struct irqtop_ctl *ctl, struct irq_output *out)
+{
+	int efd, sfd, tfd;
+	sigset_t sigmask;
+	struct signalfd_siginfo siginfo;
+	struct epoll_event ev, events[MAX_EVENTS];
+	long int nr;
+	uint64_t unused;
+	int retval = 0;
+
+	efd = epoll_create1(0);
+
+	if ((tfd = timerfd_create(CLOCK_MONOTONIC, 0)) < 0)
+		err(EXIT_FAILURE, _("cannot not create timerfd"));
+	if (timerfd_settime(tfd, 0, &ctl->timer, NULL) != 0)
+		err(EXIT_FAILURE, _("cannot set timerfd"));
+
+	ev.events = EPOLLIN;
+	ev.data.fd = tfd;
+	if (epoll_ctl(efd, EPOLL_CTL_ADD, tfd, &ev) != 0)
+		err(EXIT_FAILURE, _("epoll_ctl failed"));
+
+	if (sigfillset(&sigmask) != 0)
+		err(EXIT_FAILURE, _("sigfillset failed"));
+	if (sigprocmask(SIG_BLOCK, &sigmask, NULL) != 0)
+		err(EXIT_FAILURE, _("sigprocmask failed"));
+
+	sigaddset(&sigmask, SIGWINCH);
+	sigaddset(&sigmask, SIGTERM);
+	sigaddset(&sigmask, SIGINT);
+	sigaddset(&sigmask, SIGQUIT);
+
+	if ((sfd = signalfd(-1, &sigmask, SFD_CLOEXEC)) < 0)
+		err(EXIT_FAILURE, _("cannot not create signalfd"));
+
+	ev.events = EPOLLIN;
+	ev.data.fd = sfd;
+	if (epoll_ctl(efd, EPOLL_CTL_ADD, sfd, &ev) != 0)
+		err(EXIT_FAILURE, _("epoll_ctl failed"));
+
+	ev.events = EPOLLIN;
+	ev.data.fd = STDIN_FILENO;
+	if (epoll_ctl(efd, EPOLL_CTL_ADD, STDIN_FILENO, &ev) != 0)
+		err(EXIT_FAILURE, _("epoll_ctl failed"));
+
+	retval |= update_screen(ctl, out);
+	refresh();
+
+	while (!ctl->request_exit) {
+		const ssize_t nr_events = epoll_wait(efd, events, MAX_EVENTS, -1);
+
+		for (nr = 0; nr < nr_events; nr++) {
+			if (events[nr].data.fd == tfd) {
+				if (read(tfd, &unused, sizeof(unused)) < 0)
+					warn(_("read failed"));
+			} else if (events[nr].data.fd == sfd) {
+				if (read(sfd, &siginfo, sizeof(siginfo)) < 0) {
+					warn(_("read failed"));
+					continue;
+				}
+				if (siginfo.ssi_signo == SIGWINCH) {
+					get_terminal_dimension(&ctl->cols, &ctl->rows);
+#if HAVE_RESIZETERM
+					resizeterm(ctl->rows, ctl->cols);
+#endif
+				}
+				else {
+					ctl->request_exit = 1;
+					break;
+				}
+			} else if (events[nr].data.fd == STDIN_FILENO) {
+				char c;
+
+				if (read(STDIN_FILENO, &c, 1) != 1)
+					warn(_("read failed"));
+				parse_input(ctl, out, c);
+			} else
+				abort();
+			retval |= update_screen(ctl, out);
+			refresh();
+		}
+	}
+	return retval;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	fputs(USAGE_HEADER, stdout);
+	printf(_(" %s [options]\n"), program_invocation_short_name);
+	fputs(USAGE_SEPARATOR, stdout);
+
+	puts(_("Interactive utility to display kernel interrupt information."));
+
+	fputs(USAGE_OPTIONS, stdout);
+	fputs(_(" -d, --delay <secs>   delay updates\n"), stdout);
+	fputs(_(" -o, --output <list>  define which output columns to use\n"), stdout);
+	fputs(_(" -s, --sort <column>  specify sort column\n"), stdout);
+	fputs(USAGE_SEPARATOR, stdout);
+	printf(USAGE_HELP_OPTIONS(22));
+
+	fputs(_("\nThe following interactive key commands are valid:\n"), stdout);
+	fputs(_("  i      sort by IRQ\n"), stdout);
+	fputs(_("  t      sort by TOTAL\n"), stdout);
+	fputs(_("  d      sort by DELTA\n"), stdout);
+	fputs(_("  n      sort by NAME\n"), stdout);
+	fputs(_("  q Q    quit program\n"), stdout);
+
+	fputs(USAGE_COLUMNS, stdout);
+	irq_print_columns(stdout, 0);
+
+	printf(USAGE_MAN_TAIL("irqtop(1)"));
+	exit(EXIT_SUCCESS);
+}
+
+static void parse_args(	struct irqtop_ctl *ctl,
+			struct irq_output *out,
+			int argc,
+			char **argv)
+{
+	const char *outarg = NULL;
+	static const struct option longopts[] = {
+		{"delay", required_argument, NULL, 'd'},
+		{"sort", required_argument, NULL, 's'},
+		{"output", required_argument, NULL, 'o'},
+		{"help", no_argument, NULL, 'h'},
+		{"version", no_argument, NULL, 'V'},
+		{NULL, 0, NULL, 0}
+	};
+	int o;
+
+	while ((o = getopt_long(argc, argv, "d:o:s:hV", longopts, NULL)) != -1) {
+		switch (o) {
+		case 'd':
+			{
+				struct timeval delay;
+
+				strtotimeval_or_err(optarg, &delay,
+						    _("failed to parse delay argument"));
+				TIMEVAL_TO_TIMESPEC(&delay, &ctl->timer.it_interval);
+				ctl->timer.it_value = ctl->timer.it_interval;
+			}
+			break;
+		case 's':
+			set_sort_func_by_name(out, optarg);
+			break;
+		case 'o':
+			outarg = optarg;
+			break;
+		case 'V':
+			print_version(EXIT_SUCCESS);
+		case 'h':
+			usage();
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+	}
+
+	/* default */
+	if (!out->ncolumns) {
+		out->columns[out->ncolumns++] = COL_IRQ;
+		out->columns[out->ncolumns++] = COL_TOTAL;
+		out->columns[out->ncolumns++] = COL_DELTA;
+		out->columns[out->ncolumns++] = COL_NAME;
+	}
+
+	/* add -o [+]<list> to putput */
+	if (outarg && string_add_to_idarray(outarg, out->columns,
+				ARRAY_SIZE(out->columns),
+				&out->ncolumns,
+				irq_column_name_to_id) < 0)
+		exit(EXIT_FAILURE);
+}
+
+int main(int argc, char **argv)
+{
+	int is_tty = 0;
+	struct termios saved_tty;
+	struct irq_output out = {
+		.ncolumns = 0
+	};
+	struct irqtop_ctl ctl = {
+		.timer.it_interval = {3, 0},
+		.timer.it_value = {3, 0}
+	};
+
+	setlocale(LC_ALL, "");
+
+	parse_args(&ctl, &out, argc, argv);
+
+	is_tty = isatty(STDIN_FILENO);
+	if (is_tty && tcgetattr(STDIN_FILENO, &saved_tty) == -1)
+		fputs(_("terminal setting retrieval"), stdout);
+
+	ctl.win = initscr();
+	get_terminal_dimension(&ctl.cols, &ctl.rows);
+#if HAVE_RESIZETERM
+	resizeterm(ctl.rows, ctl.cols);
+#endif
+	curs_set(0);
+
+	ctl.hostname = xgethostname();
+	event_loop(&ctl, &out);
+
+	free_irqstat(ctl.prev_stat);
+	free(ctl.hostname);
+
+	if (is_tty)
+		tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_tty);
+	delwin(ctl.win);
+	endwin();
+
+	return EXIT_SUCCESS;
+}