xref: /illumos-gate/usr/src/cmd/flowadm/flowadm.c (revision a724c049b7e0dd8612bc3aaec84e96e80511050d)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #include <stdio.h>
27 #include <locale.h>
28 #include <stdarg.h>
29 #include <stdlib.h>
30 #include <fcntl.h>
31 #include <string.h>
32 #include <stropts.h>
33 #include <errno.h>
34 #include <kstat.h>
35 #include <strings.h>
36 #include <getopt.h>
37 #include <unistd.h>
38 #include <priv.h>
39 #include <netdb.h>
40 #include <libintl.h>
41 #include <libdlflow.h>
42 #include <libdllink.h>
43 #include <libdlstat.h>
44 #include <sys/types.h>
45 #include <sys/socket.h>
46 #include <netinet/in.h>
47 #include <arpa/inet.h>
48 #include <sys/ethernet.h>
49 #include <inet/ip.h>
50 #include <inet/ip6.h>
51 #include <stddef.h>
52 
53 #define	CMD_TYPE_ANY	0xffffffff
54 #define	STR_UNDEF_VAL	"--"
55 
56 
57 /*
58  * data structures and routines for printing output.
59  */
60 
61 typedef struct print_field_s {
62 	const char	*pf_name;
63 	const char	*pf_header;
64 	uint_t		pf_width;
65 	union {
66 		uint_t	_pf_index;
67 		size_t	_pf_offset;
68 	}_pf_un;
69 #define	pf_index	_pf_un._pf_index
70 #define	pf_offset	_pf_un._pf_offset;
71 	uint_t	pf_cmdtype;
72 } print_field_t;
73 
74 typedef struct print_state_s {
75 	print_field_t	**ps_fields;
76 	uint_t		ps_nfields;
77 	boolean_t	ps_lastfield;
78 	uint_t		ps_overflow;
79 } print_state_t;
80 
81 typedef struct show_usage_state_s {
82 	boolean_t	us_plot;
83 	boolean_t	us_parseable;
84 	boolean_t	us_printheader;
85 	boolean_t	us_first;
86 	print_state_t	us_print;
87 } show_usage_state_t;
88 
89 typedef char *(*print_callback_t)(print_field_t *, void *);
90 static print_field_t **parse_output_fields(char *, print_field_t *, int,
91     uint_t, uint_t *);
92 
93 static void print_header(print_state_t *);
94 static void print_field(print_state_t *, print_field_t *, const char *,
95     boolean_t);
96 
97 static void flowadm_print_output(print_state_t *, boolean_t,
98     print_callback_t, void *);
99 
100 /*
101  * helper function that, when invoked as flowadm(print_field(pf, buf)
102  * prints string which is offset by pf->pf_offset within buf.
103  */
104 static char *flowadm_print_field(print_field_t *, void *);
105 
106 #define	MAX_FIELD_LEN	32
107 
108 typedef void cmdfunc_t(int, char **);
109 
110 static cmdfunc_t do_add_flow, do_remove_flow, do_init_flow, do_show_flow;
111 static cmdfunc_t do_show_flowprop, do_set_flowprop, do_reset_flowprop;
112 static cmdfunc_t do_show_usage;
113 
114 static int	show_flow(dladm_flow_attr_t *, void *);
115 static int	show_flows_onelink(dladm_handle_t, datalink_id_t, void *);
116 
117 static void	flow_stats(const char *, datalink_id_t,  uint_t);
118 static void	get_flow_stats(const char *, pktsum_t *);
119 static int	show_flow_stats(dladm_flow_attr_t *, void *);
120 static int	show_link_flow_stats(dladm_handle_t, datalink_id_t, void *);
121 
122 static int	remove_flow(dladm_flow_attr_t *, void *);
123 
124 static int	show_flowprop(dladm_flow_attr_t *, void *);
125 static void	show_flowprop_one_flow(void *, const char *);
126 static int	show_flowprop_onelink(dladm_handle_t, datalink_id_t, void *);
127 
128 static void	die(const char *, ...);
129 static void	die_optdup(int);
130 static void	die_opterr(int, int);
131 static void	die_dlerr(dladm_status_t, const char *, ...);
132 static void	warn(const char *, ...);
133 static void	warn_dlerr(dladm_status_t, const char *, ...);
134 
135 typedef struct	cmd {
136 	char	*c_name;
137 	void	(*c_fn)(int, char **);
138 } cmd_t;
139 
140 static cmd_t	cmds[] = {
141 	{ "add-flow", do_add_flow },
142 	{ "remove-flow", do_remove_flow },
143 	{ "show-flowprop", do_show_flowprop },
144 	{ "set-flowprop", do_set_flowprop },
145 	{ "reset-flowprop", do_reset_flowprop },
146 	{ "show-flow", do_show_flow },
147 	{ "init-flow", do_init_flow },
148 	{ "show-usage", do_show_usage }
149 };
150 
151 static const struct option longopts[] = {
152 	{"link",		required_argument,	0, 'l'},
153 	{"parseable",		no_argument,		0, 'p'},
154 	{"statistics",		no_argument,		0, 's'},
155 	{"interval",		required_argument,	0, 'i'},
156 	{"temporary",		no_argument,		0, 't'},
157 	{"root-dir",		required_argument,	0, 'R'},
158 	{ 0, 0, 0, 0 }
159 };
160 
161 static const struct option prop_longopts[] = {
162 	{"link",		required_argument,	0, 'l'},
163 	{"temporary",		no_argument,		0, 't'},
164 	{"root-dir",		required_argument,	0, 'R'},
165 	{"prop",		required_argument,	0, 'p'},
166 	{"attr",		required_argument,	0, 'a'},
167 	{ 0, 0, 0, 0 }
168 };
169 
170 /*
171  * structures for 'flowadm show-flow'
172  */
173 
174 typedef struct show_flow_state {
175 	boolean_t		fs_firstonly;
176 	boolean_t		fs_donefirst;
177 	pktsum_t		fs_prevstats;
178 	uint32_t		fs_flags;
179 	dladm_status_t		fs_status;
180 	print_state_t		fs_print;
181 	const char		*fs_flow;
182 	const char		*fs_link;
183 	boolean_t		fs_parseable;
184 	boolean_t		fs_printheader;
185 	boolean_t		fs_persist;
186 	boolean_t		fs_stats;
187 	uint64_t		fs_mask;
188 } show_flow_state_t;
189 
190 /*
191  * structures for 'flowadm remove-flow'
192  */
193 
194 typedef struct remove_flow_state {
195 	boolean_t	fs_tempop;
196 	const char	*fs_altroot;
197 	dladm_status_t	fs_status;
198 } remove_flow_state_t;
199 
200 typedef struct flow_args_s {
201 	const char		*fa_link;
202 	int			fa_attrno;	/* -1 indicates flow itself */
203 	uint64_t		fa_mask;
204 	dladm_flow_attr_t	*fa_finfop;
205 	dladm_status_t		*fa_status;
206 	boolean_t		fa_parseable;
207 } flow_args_t;
208 
209 #define	PROTO_MAXSTR_LEN	7
210 #define	PORT_MAXSTR_LEN		6
211 #define	DSFIELD_MAXSTR_LEN	10
212 
213 typedef struct flow_fields_buf_s
214 {
215 	char flow_name[MAXNAMELEN];
216 	char flow_link[MAXLINKNAMELEN];
217 	char flow_ipaddr[INET6_ADDRSTRLEN+4];
218 	char flow_proto[PROTO_MAXSTR_LEN];
219 	char flow_port[PORT_MAXSTR_LEN];
220 	char flow_dsfield[DSFIELD_MAXSTR_LEN];
221 } flow_fields_buf_t;
222 
223 static print_field_t flow_fields[] = {
224 /* name,	header,		field width,	index,		cmdtype	*/
225 {  "flow",	"FLOW",		11,
226     offsetof(flow_fields_buf_t, flow_name),	CMD_TYPE_ANY},
227 {  "link",	"LINK",		11,
228     offsetof(flow_fields_buf_t, flow_link),	CMD_TYPE_ANY},
229 {  "ipaddr",	"IP ADDR",	30,
230     offsetof(flow_fields_buf_t, flow_ipaddr),	CMD_TYPE_ANY},
231 {  "transport",	"PROTO",	6,
232     offsetof(flow_fields_buf_t, flow_proto),	CMD_TYPE_ANY},
233 {  "port",	 "PORT",	7,
234     offsetof(flow_fields_buf_t, flow_port),	CMD_TYPE_ANY},
235 {  "dsfield",	"DSFLD",	9,
236     offsetof(flow_fields_buf_t, flow_dsfield),	CMD_TYPE_ANY}}
237 ;
238 
239 #define	FLOW_MAX_FIELDS		(sizeof (flow_fields) / sizeof (print_field_t))
240 
241 /*
242  * structures for 'flowadm show-flowprop'
243  */
244 typedef enum {
245 	FLOWPROP_FLOW,
246 	FLOWPROP_PROPERTY,
247 	FLOWPROP_VALUE,
248 	FLOWPROP_DEFAULT,
249 	FLOWPROP_POSSIBLE
250 } flowprop_field_index_t;
251 
252 static print_field_t flowprop_fields[] = {
253 /* name,	header,		fieldwidth,	index,		cmdtype */
254 { "flow",	"FLOW",		12,	FLOWPROP_FLOW,		CMD_TYPE_ANY},
255 { "property",	"PROPERTY",	15,	FLOWPROP_PROPERTY,	CMD_TYPE_ANY},
256 { "value",	"VALUE",	14,	FLOWPROP_VALUE,		CMD_TYPE_ANY},
257 { "default",	"DEFAULT",	14,	FLOWPROP_DEFAULT,	CMD_TYPE_ANY},
258 { "possible",	"POSSIBLE",	20,	FLOWPROP_POSSIBLE,	CMD_TYPE_ANY}}
259 ;
260 #define	FLOWPROP_MAX_FIELDS					\
261 	(sizeof (flowprop_fields) / sizeof (print_field_t))
262 
263 #define	MAX_PROP_LINE		512
264 
265 typedef struct show_flowprop_state {
266 	const char		*fs_flow;
267 	datalink_id_t		fs_linkid;
268 	char			*fs_line;
269 	char			**fs_propvals;
270 	dladm_arg_list_t	*fs_proplist;
271 	boolean_t		fs_parseable;
272 	boolean_t		fs_persist;
273 	boolean_t		fs_header;
274 	dladm_status_t		fs_status;
275 	dladm_status_t		fs_retstatus;
276 	print_state_t		fs_print;
277 } show_flowprop_state_t;
278 
279 typedef struct set_flowprop_state {
280 	const char	*fs_name;
281 	boolean_t	fs_reset;
282 	boolean_t	fs_temp;
283 	dladm_status_t	fs_status;
284 } set_flowprop_state_t;
285 
286 typedef struct flowprop_args_s {
287 	show_flowprop_state_t	*fs_state;
288 	char			*fs_propname;
289 	char			*fs_flowname;
290 } flowprop_args_t;
291 
292 /*
293  * structures for 'flow show-usage'
294  */
295 
296 typedef struct  usage_fields_buf_s {
297 	char	usage_flow[12];
298 	char	usage_duration[10];
299 	char	usage_ipackets[9];
300 	char	usage_rbytes[10];
301 	char	usage_opackets[9];
302 	char	usage_obytes[10];
303 	char	usage_bandwidth[14];
304 } usage_fields_buf_t;
305 
306 static print_field_t usage_fields[] = {
307 /* name,	header,		field width,	offset,	cmdtype		*/
308 { "flow",	"FLOW",			12,
309     offsetof(usage_fields_buf_t, usage_flow),		CMD_TYPE_ANY},
310 { "duration",	"DURATION",		10,
311     offsetof(usage_fields_buf_t, usage_duration),	CMD_TYPE_ANY},
312 { "ipackets",	"IPACKETS",		9,
313     offsetof(usage_fields_buf_t, usage_ipackets),	CMD_TYPE_ANY},
314 { "rbytes",	"RBYTES",		10,
315     offsetof(usage_fields_buf_t, usage_rbytes),		CMD_TYPE_ANY},
316 { "opackets",	"OPACKETS",		9,
317     offsetof(usage_fields_buf_t, usage_opackets),	CMD_TYPE_ANY},
318 { "obytes",	"OBYTES",		10,
319     offsetof(usage_fields_buf_t, usage_obytes),		CMD_TYPE_ANY},
320 { "bandwidth",	"BANDWIDTH",		14,
321     offsetof(usage_fields_buf_t, usage_bandwidth),	CMD_TYPE_ANY}}
322 ;
323 
324 #define	USAGE_MAX_FIELDS	(sizeof (usage_fields) / sizeof (print_field_t))
325 
326 /*
327  * structures for 'dladm show-usage link'
328  */
329 
330 typedef struct  usage_l_fields_buf_s {
331 	char	usage_l_flow[12];
332 	char	usage_l_stime[13];
333 	char	usage_l_etime[13];
334 	char	usage_l_rbytes[8];
335 	char	usage_l_obytes[8];
336 	char	usage_l_bandwidth[14];
337 } usage_l_fields_buf_t;
338 
339 static print_field_t usage_l_fields[] = {
340 /* name,	header,		field width,	offset,	cmdtype		*/
341 { "flow",	"FLOW",		12,
342     offsetof(usage_l_fields_buf_t, usage_l_flow),	CMD_TYPE_ANY},
343 { "start",	"START",	13,
344     offsetof(usage_l_fields_buf_t, usage_l_stime),	CMD_TYPE_ANY},
345 { "end",	"END",		13,
346     offsetof(usage_l_fields_buf_t, usage_l_etime),	CMD_TYPE_ANY},
347 { "rbytes",	"RBYTES",	8,
348     offsetof(usage_l_fields_buf_t, usage_l_rbytes),	CMD_TYPE_ANY},
349 { "obytes",	"OBYTES",	8,
350     offsetof(usage_l_fields_buf_t, usage_l_obytes),	CMD_TYPE_ANY},
351 { "bandwidth",	"BANDWIDTH",	14,
352     offsetof(usage_l_fields_buf_t, usage_l_bandwidth),	CMD_TYPE_ANY}}
353 ;
354 
355 #define	USAGE_L_MAX_FIELDS \
356 	(sizeof (usage_l_fields) /sizeof (print_field_t))
357 
358 #define	PRI_HI		100
359 #define	PRI_LO 		10
360 #define	PRI_NORM	50
361 
362 #define	FLOWADM_CONF	"/etc/dladm/flowadm.conf"
363 #define	BLANK_LINE(s)	((s[0] == '\0') || (s[0] == '#') || (s[0] == '\n'))
364 
365 static char *progname;
366 
367 boolean_t		t_arg = B_FALSE; /* changes are persistent */
368 char			*altroot = NULL;
369 
370 /*
371  * Handle to libdladm.  Opened in main() before the sub-command
372  * specific function is called.
373  */
374 static dladm_handle_t handle = NULL;
375 
376 static const char *attr_table[] =
377 	{"local_ip", "remote_ip", "transport", "local_port", "dsfield"};
378 
379 #define	NATTR	(sizeof (attr_table)/sizeof (char *))
380 
381 static void
382 usage(void)
383 {
384 	(void) fprintf(stderr, gettext("usage: flowadm <subcommand>"
385 	    " <args>...\n"
386 	    "    add-flow       [-t] -l <link> -a <attr>=<value>[,...]\n"
387 	    "\t\t   [-p <prop>=<value>,...] <flow>\n"
388 	    "    remove-flow    [-t] {-l <link> | <flow>}\n"
389 	    "    show-flow      [-p] [-s [-i <interval>]] [-l <link>] "
390 	    "[<flow>]\n\n"
391 	    "    set-flowprop   [-t] -p <prop>=<value>[,...] <flow>\n"
392 	    "    reset-flowprop [-t] [-p <prop>,...] <flow>\n"
393 	    "    show-flowprop  [-cP] [-l <link>] [-p <prop>,...] "
394 	    "[<flow>]\n\n"
395 	    "    show-usage     [-d|-p -F <format>] "
396 	    "[-s <DD/MM/YYYY,HH:MM:SS>]\n"
397 	    "\t\t   [-e <DD/MM/YYYY,HH:MM:SS>] -f <logfile> [<flow>]\n"));
398 
399 	/* close dladm handle if it was opened */
400 	if (handle != NULL)
401 		dladm_close(handle);
402 
403 	exit(1);
404 }
405 
406 int
407 main(int argc, char *argv[])
408 {
409 	int	i, arglen, cmdlen;
410 	cmd_t	*cmdp;
411 	dladm_status_t status;
412 
413 	(void) setlocale(LC_ALL, "");
414 #if !defined(TEXT_DOMAIN)
415 #define	TEXT_DOMAIN "SYS_TEST"
416 #endif
417 	(void) textdomain(TEXT_DOMAIN);
418 
419 	progname = argv[0];
420 
421 	if (argc < 2)
422 		usage();
423 
424 	for (i = 0; i < sizeof (cmds) / sizeof (cmds[0]); i++) {
425 		cmdp = &cmds[i];
426 		arglen = strlen(argv[1]);
427 		cmdlen = strlen(cmdp->c_name);
428 		if ((arglen == cmdlen) && (strncmp(argv[1], cmdp->c_name,
429 		    cmdlen) == 0)) {
430 			/* Open the libdladm handle */
431 			if ((status = dladm_open(&handle)) != DLADM_STATUS_OK) {
432 				die_dlerr(status,
433 				    "could not open /dev/dld");
434 			}
435 
436 			cmdp->c_fn(argc - 1, &argv[1]);
437 
438 			dladm_close(handle);
439 			exit(0);
440 		}
441 	}
442 
443 	(void) fprintf(stderr, gettext("%s: unknown subcommand '%s'\n"),
444 	    progname, argv[1]);
445 	usage();
446 
447 	return (0);
448 }
449 
450 static const char *
451 match_attr(char *attr)
452 {
453 	int i;
454 
455 	for (i = 0; i < NATTR; i++) {
456 		if (strlen(attr) == strlen(attr_table[i]) &&
457 		    strncmp(attr, attr_table[i], strlen(attr_table[i])) == 0) {
458 			return (attr);
459 		}
460 	}
461 	return (NULL);
462 }
463 
464 /* ARGSUSED */
465 static void
466 do_init_flow(int argc, char *argv[])
467 {
468 	dladm_status_t status;
469 
470 	status = dladm_flow_init(handle);
471 	if (status != DLADM_STATUS_OK)
472 		die_dlerr(status, "flows initialization failed");
473 }
474 
475 /* ARGSUSED */
476 static int
477 show_usage_date(dladm_usage_t *usage, void *arg)
478 {
479 
480 	time_t	stime;
481 	char	timebuf[20];
482 
483 	stime = usage->du_stime;
484 	(void) strftime(timebuf, sizeof (timebuf), "%m/%d/%Y",
485 	    localtime(&stime));
486 	(void) printf("%s\n", timebuf);
487 
488 	return (DLADM_STATUS_OK);
489 }
490 
491 static int
492 show_usage_time(dladm_usage_t *usage, void *arg)
493 {
494 	show_usage_state_t	*state = (show_usage_state_t *)arg;
495 	char			buf[DLADM_STRSIZE];
496 	usage_l_fields_buf_t 	ubuf;
497 	time_t			time;
498 	double			bw;
499 
500 	if (state->us_plot) {
501 		if (!state->us_printheader) {
502 			if (state->us_first) {
503 				(void) printf("# Time");
504 				state->us_first = B_FALSE;
505 			}
506 			(void) printf(" %s", usage->du_name);
507 			if (usage->du_last) {
508 				(void) printf("\n");
509 				state->us_first = B_TRUE;
510 				state->us_printheader = B_TRUE;
511 			}
512 		} else {
513 			if (state->us_first) {
514 				time = usage->du_etime;
515 				(void) strftime(buf, sizeof (buf), "%T",
516 				    localtime(&time));
517 				state->us_first = B_FALSE;
518 				(void) printf("%s", buf);
519 			}
520 			bw = (double)usage->du_bandwidth/1000;
521 			(void) printf(" %.2f", bw);
522 			if (usage->du_last) {
523 				(void) printf("\n");
524 				state->us_first = B_TRUE;
525 			}
526 		}
527 		return (DLADM_STATUS_OK);
528 	}
529 
530 	bzero(&ubuf, sizeof (ubuf));
531 
532 	(void) snprintf(ubuf.usage_l_flow, sizeof (ubuf.usage_l_flow), "%s",
533 	    usage->du_name);
534 	time = usage->du_stime;
535 	(void) strftime(buf, sizeof (buf), "%T", localtime(&time));
536 	(void) snprintf(ubuf.usage_l_stime, sizeof (ubuf.usage_l_stime), "%s",
537 	    buf);
538 	time = usage->du_etime;
539 	(void) strftime(buf, sizeof (buf), "%T", localtime(&time));
540 	(void) snprintf(ubuf.usage_l_etime, sizeof (ubuf.usage_l_etime), "%s",
541 	    buf);
542 	(void) snprintf(ubuf.usage_l_rbytes, sizeof (ubuf.usage_l_rbytes),
543 	    "%llu", usage->du_rbytes);
544 	(void) snprintf(ubuf.usage_l_obytes, sizeof (ubuf.usage_l_obytes),
545 	    "%llu", usage->du_obytes);
546 	(void) snprintf(ubuf.usage_l_bandwidth, sizeof (ubuf.usage_l_bandwidth),
547 	    "%s Mbps", dladm_bw2str(usage->du_bandwidth, buf));
548 
549 	if (!state->us_parseable && !state->us_printheader) {
550 		print_header(&state->us_print);
551 		state->us_printheader = B_TRUE;
552 	}
553 
554 	flowadm_print_output(&state->us_print, state->us_parseable,
555 	    flowadm_print_field, (void *)&ubuf);
556 
557 	return (DLADM_STATUS_OK);
558 }
559 
560 static int
561 show_usage_res(dladm_usage_t *usage, void *arg)
562 {
563 	show_usage_state_t	*state = (show_usage_state_t *)arg;
564 	char			buf[DLADM_STRSIZE];
565 	usage_fields_buf_t	ubuf;
566 
567 	bzero(&ubuf, sizeof (ubuf));
568 
569 	(void) snprintf(ubuf.usage_flow, sizeof (ubuf.usage_flow), "%s",
570 	    usage->du_name);
571 	(void) snprintf(ubuf.usage_duration, sizeof (ubuf.usage_duration),
572 	    "%llu", usage->du_duration);
573 	(void) snprintf(ubuf.usage_ipackets, sizeof (ubuf.usage_ipackets),
574 	    "%llu", usage->du_ipackets);
575 	(void) snprintf(ubuf.usage_rbytes, sizeof (ubuf.usage_rbytes),
576 	    "%llu", usage->du_rbytes);
577 	(void) snprintf(ubuf.usage_opackets, sizeof (ubuf.usage_opackets),
578 	    "%llu", usage->du_opackets);
579 	(void) snprintf(ubuf.usage_obytes, sizeof (ubuf.usage_obytes),
580 	    "%llu", usage->du_obytes);
581 	(void) snprintf(ubuf.usage_bandwidth, sizeof (ubuf.usage_bandwidth),
582 	    "%s Mbps", dladm_bw2str(usage->du_bandwidth, buf));
583 
584 	if (!state->us_parseable && !state->us_printheader) {
585 		print_header(&state->us_print);
586 		state->us_printheader = B_TRUE;
587 	}
588 
589 	flowadm_print_output(&state->us_print, state->us_parseable,
590 	    flowadm_print_field, (void *)&ubuf);
591 
592 	return (DLADM_STATUS_OK);
593 }
594 
595 static boolean_t
596 valid_formatspec(char *formatspec_str)
597 {
598 	if (strcmp(formatspec_str, "gnuplot") == 0)
599 		return (B_TRUE);
600 	return (B_FALSE);
601 }
602 
603 /* ARGSUSED */
604 static void
605 do_show_usage(int argc, char *argv[])
606 {
607 	char			*file = NULL;
608 	int			opt;
609 	dladm_status_t		status;
610 	boolean_t		d_arg = B_FALSE;
611 	boolean_t		p_arg = B_FALSE;
612 	char			*stime = NULL;
613 	char			*etime = NULL;
614 	char			*resource = NULL;
615 	show_usage_state_t	state;
616 	boolean_t		o_arg = B_FALSE;
617 	boolean_t		F_arg = B_FALSE;
618 	char			*fields_str = NULL;
619 	char			*formatspec_str = NULL;
620 	print_field_t		**fields;
621 	uint_t			nfields;
622 	char			*all_fields =
623 	    "flow,duration,ipackets,rbytes,opackets,obytes,bandwidth";
624 	char			*all_l_fields =
625 	    "flow,start,end,rbytes,obytes,bandwidth";
626 
627 	bzero(&state, sizeof (show_usage_state_t));
628 	state.us_parseable = B_FALSE;
629 	state.us_printheader = B_FALSE;
630 	state.us_plot = B_FALSE;
631 	state.us_first = B_TRUE;
632 
633 	while ((opt = getopt(argc, argv, "dps:e:o:f:F:")) != -1) {
634 		switch (opt) {
635 		case 'd':
636 			d_arg = B_TRUE;
637 			break;
638 		case 'p':
639 			state.us_plot = p_arg = B_TRUE;
640 			break;
641 		case 'f':
642 			file = optarg;
643 			break;
644 		case 's':
645 			stime = optarg;
646 			break;
647 		case 'e':
648 			etime = optarg;
649 			break;
650 		case 'o':
651 			o_arg = B_TRUE;
652 			fields_str = optarg;
653 			break;
654 		case 'F':
655 			F_arg = B_TRUE;
656 			formatspec_str = optarg;
657 			break;
658 		default:
659 			die_opterr(optopt, opt);
660 		}
661 	}
662 
663 	if (file == NULL)
664 		die("show-usage requires a file");
665 
666 	if (optind == (argc-1)) {
667 		resource = argv[optind];
668 	}
669 
670 	if (resource == NULL && stime == NULL && etime == NULL) {
671 		if (!o_arg || (o_arg && strcasecmp(fields_str, "all") == 0))
672 			fields_str = all_fields;
673 		fields = parse_output_fields(fields_str, usage_fields,
674 		    USAGE_MAX_FIELDS, CMD_TYPE_ANY, &nfields);
675 	} else {
676 		if (!o_arg || (o_arg && strcasecmp(fields_str, "all") == 0))
677 			fields_str = all_l_fields;
678 		fields = parse_output_fields(fields_str, usage_l_fields,
679 		    USAGE_L_MAX_FIELDS, CMD_TYPE_ANY, &nfields);
680 	}
681 
682 	if (fields == NULL) {
683 		die("invalid fields(s) specified");
684 		return;
685 	}
686 	state.us_print.ps_fields = fields;
687 	state.us_print.ps_nfields = nfields;
688 
689 	if (p_arg && d_arg)
690 		die("plot and date options are incompatible");
691 
692 	if (p_arg && !F_arg)
693 		die("specify format speicifier: -F <format>");
694 
695 	if (F_arg && valid_formatspec(formatspec_str) == B_FALSE)
696 		die("Format specifier %s not supported", formatspec_str);
697 
698 	if (d_arg) {
699 		/* Print log dates */
700 		status = dladm_usage_dates(show_usage_date,
701 		    DLADM_LOGTYPE_FLOW, file, resource, &state);
702 	} else if (resource == NULL && stime == NULL && etime == NULL &&
703 	    !p_arg) {
704 		/* Print summary */
705 		status = dladm_usage_summary(show_usage_res,
706 		    DLADM_LOGTYPE_FLOW, file, &state);
707 	} else if (resource != NULL) {
708 		/* Print log entries for named resource */
709 		status = dladm_walk_usage_res(show_usage_time,
710 		    DLADM_LOGTYPE_FLOW, file, resource, stime, etime, &state);
711 	} else {
712 		/* Print time and information for each link */
713 		status = dladm_walk_usage_time(show_usage_time,
714 		    DLADM_LOGTYPE_FLOW, file, stime, etime, &state);
715 	}
716 
717 	if (status != DLADM_STATUS_OK)
718 		die_dlerr(status, "show-usage");
719 }
720 
721 static void
722 do_add_flow(int argc, char *argv[])
723 {
724 	char			devname[MAXNAMELEN];
725 	char			*name = NULL;
726 	uint_t			index;
727 	datalink_id_t		linkid;
728 
729 	char			option;
730 	boolean_t		l_arg = B_FALSE;
731 	dladm_arg_list_t	*proplist = NULL;
732 	dladm_arg_list_t	*attrlist = NULL;
733 	dladm_status_t		status;
734 
735 	while ((option = getopt_long(argc, argv, "tR:l:a:p:",
736 	    prop_longopts, NULL)) != -1) {
737 		switch (option) {
738 		case 't':
739 			t_arg = B_TRUE;
740 			break;
741 		case 'R':
742 			altroot = optarg;
743 			break;
744 		case 'l':
745 			if (strlcpy(devname, optarg,
746 			    MAXNAMELEN) >= MAXNAMELEN) {
747 				die("link name too long");
748 			}
749 			if (dladm_name2info(handle, devname, &linkid, NULL,
750 			    NULL, NULL) != DLADM_STATUS_OK)
751 				die("invalid link '%s'", devname);
752 			l_arg = B_TRUE;
753 			break;
754 		case 'a':
755 			if (dladm_parse_flow_attrs(optarg, &attrlist, B_FALSE)
756 			    != DLADM_STATUS_OK)
757 				die("invalid flow attribute specified");
758 			break;
759 		case 'p':
760 			if (dladm_parse_flow_props(optarg, &proplist, B_FALSE)
761 			    != DLADM_STATUS_OK)
762 				die("invalid flow property specified");
763 			break;
764 		default:
765 			die_opterr(optopt, option);
766 		}
767 	}
768 	if (!l_arg) {
769 		die("link is required");
770 	}
771 
772 	opterr = 0;
773 	index = optind;
774 
775 	if ((index != (argc - 1)) || match_attr(argv[index]) != NULL) {
776 		die("flow name is required");
777 	} else {
778 		/* get flow name; required last argument */
779 		if (strlen(argv[index]) >= MAXFLOWNAME)
780 			die("flow name too long");
781 		name = argv[index];
782 	}
783 
784 	status = dladm_flow_add(handle, linkid, attrlist, proplist, name,
785 	    t_arg, altroot);
786 	if (status != DLADM_STATUS_OK)
787 		die_dlerr(status, "add flow failed");
788 
789 	dladm_free_attrs(attrlist);
790 	dladm_free_props(proplist);
791 }
792 
793 static void
794 do_remove_flow(int argc, char *argv[])
795 {
796 	char			option;
797 	char			*flowname = NULL;
798 	char			linkname[MAXNAMELEN];
799 	datalink_id_t		linkid = DATALINK_ALL_LINKID;
800 	boolean_t		l_arg = B_FALSE;
801 	remove_flow_state_t	state;
802 	dladm_status_t		status;
803 
804 	bzero(&state, sizeof (state));
805 
806 	opterr = 0;
807 	while ((option = getopt_long(argc, argv, ":tR:l:",
808 	    longopts, NULL)) != -1) {
809 		switch (option) {
810 		case 't':
811 			t_arg = B_TRUE;
812 			break;
813 		case 'R':
814 			altroot = optarg;
815 			break;
816 		case 'l':
817 			if (strlcpy(linkname, optarg,
818 			    MAXLINKNAMELEN) >= MAXLINKNAMELEN) {
819 				die("link name too long");
820 			}
821 			if (dladm_name2info(handle, linkname, &linkid, NULL,
822 			    NULL, NULL) != DLADM_STATUS_OK) {
823 				die("invalid link '%s'", linkname);
824 			}
825 			l_arg = B_TRUE;
826 			break;
827 		default:
828 			die_opterr(optopt, option);
829 			break;
830 		}
831 	}
832 
833 	/* when link not specified get flow name */
834 	if (!l_arg) {
835 		if (optind != (argc-1)) {
836 			usage();
837 		} else {
838 			if (strlen(argv[optind]) >= MAXFLOWNAME)
839 				die("flow name too long");
840 			flowname = argv[optind];
841 		}
842 		status = dladm_flow_remove(handle, flowname, t_arg, altroot);
843 	} else {
844 		/* if link is specified then flow name should not be there */
845 		if (optind == argc-1)
846 			usage();
847 		/* walk the link to find flows and remove them */
848 		state.fs_tempop = t_arg;
849 		state.fs_altroot = altroot;
850 		state.fs_status = DLADM_STATUS_OK;
851 		status = dladm_walk_flow(remove_flow, handle, linkid, &state,
852 		    B_FALSE);
853 		/*
854 		 * check if dladm_walk_flow terminated early and see if the
855 		 * walker function as any status for us
856 		 */
857 		if (status == DLADM_STATUS_OK)
858 			status = state.fs_status;
859 	}
860 
861 	if (status != DLADM_STATUS_OK)
862 		die_dlerr(status, "remove flow failed");
863 }
864 
865 /*
866  * Walker function for removing a flow through dladm_walk_flow();
867  */
868 static int
869 remove_flow(dladm_flow_attr_t *attr, void *arg)
870 {
871 	remove_flow_state_t	*state = (remove_flow_state_t *)arg;
872 
873 	state->fs_status = dladm_flow_remove(handle, attr->fa_flowname,
874 	    state->fs_tempop, state->fs_altroot);
875 
876 	if (state->fs_status == DLADM_STATUS_OK)
877 		return (DLADM_WALK_CONTINUE);
878 	else
879 		return (DLADM_WALK_TERMINATE);
880 }
881 
882 static char *
883 flowadm_print_field(print_field_t *pf, void *arg)
884 {
885 	char *value;
886 
887 	value = (char *)arg + pf->pf_offset;
888 	return (value);
889 }
890 
891 /*ARGSUSED*/
892 static dladm_status_t
893 print_flow(show_flow_state_t *state, dladm_flow_attr_t *attr,
894     flow_fields_buf_t *fbuf)
895 {
896 	char		link[MAXLINKNAMELEN];
897 	dladm_status_t	status;
898 
899 	if ((status = dladm_datalink_id2info(handle, attr->fa_linkid, NULL,
900 	    NULL, NULL, link, sizeof (link))) != DLADM_STATUS_OK) {
901 		return (status);
902 	}
903 
904 	(void) snprintf(fbuf->flow_name, sizeof (fbuf->flow_name),
905 	    "%s", attr->fa_flowname);
906 	(void) snprintf(fbuf->flow_link, sizeof (fbuf->flow_link),
907 	    "%s", link);
908 
909 	(void) dladm_flow_attr_ip2str(attr, fbuf->flow_ipaddr,
910 	    sizeof (fbuf->flow_ipaddr));
911 	(void) dladm_flow_attr_proto2str(attr, fbuf->flow_proto,
912 	    sizeof (fbuf->flow_proto));
913 	(void) dladm_flow_attr_port2str(attr, fbuf->flow_port,
914 	    sizeof (fbuf->flow_port));
915 	(void) dladm_flow_attr_dsfield2str(attr, fbuf->flow_dsfield,
916 	    sizeof (fbuf->flow_dsfield));
917 
918 	return (DLADM_STATUS_OK);
919 }
920 
921 /*
922  * Walker function for showing flow attributes through dladm_walk_flow().
923  */
924 static int
925 show_flow(dladm_flow_attr_t *attr, void *arg)
926 {
927 	show_flow_state_t	*statep = arg;
928 	dladm_status_t		status;
929 	flow_fields_buf_t	fbuf;
930 
931 	/*
932 	 * first get all the flow attributes into fbuf;
933 	 */
934 	bzero(&fbuf, sizeof (fbuf));
935 	status = print_flow(statep, attr, &fbuf);
936 
937 	if (status != DLADM_STATUS_OK)
938 		goto done;
939 
940 	if (!statep->fs_parseable && !statep->fs_printheader) {
941 		print_header(&statep->fs_print);
942 		statep->fs_printheader = B_TRUE;
943 	}
944 
945 	flowadm_print_output(&statep->fs_print, statep->fs_parseable,
946 	    flowadm_print_field, (void *)&fbuf);
947 
948 done:
949 	statep->fs_status = status;
950 	return (DLADM_WALK_CONTINUE);
951 }
952 
953 static void
954 show_one_flow(void *arg, const char *name)
955 {
956 	dladm_flow_attr_t	attr;
957 
958 	if (dladm_flow_info(handle, name, &attr) != DLADM_STATUS_OK)
959 		die("invalid flow: '%s'", name);
960 	else
961 		(void) show_flow(&attr, arg);
962 }
963 
964 /*
965  * Wrapper of dladm_walk_flow(show_flow,...) to make it usable to
966  * dladm_walk_datalink_id(). Used for showing flow attributes for
967  * all flows on all links.
968  */
969 static int
970 show_flows_onelink(dladm_handle_t dh, datalink_id_t linkid, void *arg)
971 {
972 	show_flow_state_t *state = arg;
973 
974 	(void) dladm_walk_flow(show_flow, dh, linkid, arg, state->fs_persist);
975 
976 	return (DLADM_WALK_CONTINUE);
977 }
978 
979 static void
980 get_flow_stats(const char *flowname, pktsum_t *stats)
981 {
982 	kstat_ctl_t	*kcp;
983 	kstat_t		*ksp;
984 
985 	bzero(stats, sizeof (*stats));
986 
987 	if ((kcp = kstat_open()) == NULL) {
988 		warn("kstat open operation failed");
989 		return;
990 	}
991 
992 	ksp = dladm_kstat_lookup(kcp, NULL, -1, flowname, "flow");
993 
994 	if (ksp != NULL)
995 		dladm_get_stats(kcp, ksp, stats);
996 
997 	(void) kstat_close(kcp);
998 }
999 
1000 /* ARGSUSED */
1001 static int
1002 show_flow_stats(dladm_flow_attr_t *attr, void *arg)
1003 {
1004 	show_flow_state_t *state = (show_flow_state_t *)arg;
1005 	const char *name = attr->fa_flowname;
1006 	pktsum_t stats, diff_stats;
1007 
1008 	if (state->fs_firstonly) {
1009 		if (state->fs_donefirst)
1010 			return (DLADM_WALK_TERMINATE);
1011 		state->fs_donefirst = B_TRUE;
1012 	} else {
1013 		bzero(&state->fs_prevstats, sizeof (state->fs_prevstats));
1014 	}
1015 
1016 	get_flow_stats(name, &stats);
1017 	dladm_stats_diff(&diff_stats, &stats, &state->fs_prevstats);
1018 
1019 	(void) printf("%-12s", name);
1020 	(void) printf("%-10llu", diff_stats.ipackets);
1021 	(void) printf("%-12llu", diff_stats.rbytes);
1022 	(void) printf("%-8llu", diff_stats.ierrors);
1023 	(void) printf("%-10llu", diff_stats.opackets);
1024 	(void) printf("%-12llu", diff_stats.obytes);
1025 	(void) printf("%-8llu\n", diff_stats.oerrors);
1026 
1027 	state->fs_prevstats = stats;
1028 
1029 	return (DLADM_WALK_CONTINUE);
1030 }
1031 
1032 /*
1033  * Wrapper of dladm_walk_flow(show_flow,...) to make it usable for
1034  * dladm_walk_datalink_id(). Used for showing flow stats for
1035  * all flows on all links.
1036  */
1037 static int
1038 show_link_flow_stats(dladm_handle_t dh, datalink_id_t linkid, void * arg)
1039 {
1040 	if (dladm_walk_flow(show_flow_stats, dh, linkid, arg, B_FALSE)
1041 	    == DLADM_STATUS_OK)
1042 		return (DLADM_WALK_CONTINUE);
1043 	else
1044 		return (DLADM_WALK_TERMINATE);
1045 }
1046 
1047 /* ARGSUSED */
1048 static void
1049 flow_stats(const char *flow, datalink_id_t linkid,  uint_t interval)
1050 {
1051 	show_flow_state_t	state;
1052 	dladm_flow_attr_t	attr;
1053 
1054 	if (flow != NULL &&
1055 	    dladm_flow_info(handle, flow, &attr) != DLADM_STATUS_OK)
1056 		die("invalid flow %s", flow);
1057 
1058 	bzero(&state, sizeof (state));
1059 
1060 	/*
1061 	 * If an interval is specified, continuously show the stats
1062 	 * for only the first flow.
1063 	 */
1064 	state.fs_firstonly = (interval != 0);
1065 
1066 	for (;;) {
1067 		if (!state.fs_donefirst)
1068 			(void) printf("%-12s%-10s%-12s%-8s%-10s%-12s%-8s\n",
1069 			    "FLOW", "IPACKETS", "RBYTES", "IERRORS",
1070 			    "OPACKETS", "OBYTES", "OERRORS");
1071 
1072 		state.fs_donefirst = B_FALSE;
1073 
1074 		/* Show stats for named flow */
1075 		if (flow != NULL)  {
1076 			state.fs_flow = flow;
1077 			(void) show_flow_stats(&attr, &state);
1078 
1079 		/* Show all stats on a link */
1080 		} else if (linkid != DATALINK_INVALID_LINKID) {
1081 			(void) dladm_walk_flow(show_flow_stats, handle, linkid,
1082 			    &state, B_FALSE);
1083 
1084 		/* Show all stats by datalink */
1085 		} else {
1086 			(void) dladm_walk_datalink_id(show_link_flow_stats,
1087 			    handle, &state, DATALINK_CLASS_ALL,
1088 			    DATALINK_ANY_MEDIATYPE, DLADM_OPT_ACTIVE);
1089 		}
1090 
1091 		if (interval == 0)
1092 			break;
1093 
1094 		(void) sleep(interval);
1095 	}
1096 }
1097 
1098 static void
1099 do_show_flow(int argc, char *argv[])
1100 {
1101 	char			flowname[MAXFLOWNAME];
1102 	char			linkname[MAXNAMELEN];
1103 	datalink_id_t		linkid = DATALINK_ALL_LINKID;
1104 	int			option;
1105 	boolean_t		s_arg = B_FALSE;
1106 	boolean_t		S_arg = B_FALSE;
1107 	boolean_t		i_arg = B_FALSE;
1108 	boolean_t		l_arg = B_FALSE;
1109 	boolean_t		o_arg = B_FALSE;
1110 	uint32_t		interval = 0;
1111 	char			*endp = NULL;
1112 	show_flow_state_t	state;
1113 	char			*fields_str = NULL;
1114 	print_field_t		**fields;
1115 	uint_t			nfields;
1116 	char			*all_fields =
1117 	    "flow,link,ipaddr,transport,port,dsfield";
1118 
1119 	bzero(&state, sizeof (state));
1120 
1121 	opterr = 0;
1122 	while ((option = getopt_long(argc, argv, ":pPsSi:l:o:",
1123 	    longopts, NULL)) != -1) {
1124 		switch (option) {
1125 		case 'p':
1126 			state.fs_parseable = B_TRUE;
1127 			break;
1128 		case 'P':
1129 			state.fs_persist = B_TRUE;
1130 			break;
1131 		case 's':
1132 			if (s_arg)
1133 				die_optdup(option);
1134 
1135 			s_arg = B_TRUE;
1136 			break;
1137 		case 'S':
1138 			if (S_arg)
1139 				die_optdup(option);
1140 
1141 			S_arg = B_TRUE;
1142 			break;
1143 		case 'o':
1144 			if (o_arg)
1145 				die_optdup(option);
1146 
1147 			o_arg = B_TRUE;
1148 			fields_str = optarg;
1149 			break;
1150 		case 'i':
1151 			if (i_arg)
1152 				die_optdup(option);
1153 
1154 			i_arg = B_TRUE;
1155 
1156 			errno = 0;
1157 			interval = (int)strtol(optarg, &endp, 10);
1158 			if (errno != 0 || interval == 0 || *endp != '\0')
1159 				die("invalid interval value" " '%d'\n",
1160 				    interval);
1161 			break;
1162 		case 'l':
1163 			if (strlcpy(linkname, optarg, MAXLINKNAMELEN)
1164 			    >= MAXLINKNAMELEN)
1165 				die("link name too long\n");
1166 			if (dladm_name2info(handle, linkname, &linkid, NULL,
1167 			    NULL, NULL) != DLADM_STATUS_OK)
1168 				die("invalid link '%s'", linkname);
1169 			l_arg = B_TRUE;
1170 			break;
1171 		default:
1172 			die_opterr(optopt, option);
1173 			break;
1174 		}
1175 	}
1176 	if (i_arg && !(s_arg || S_arg))
1177 		die("the -i option can be used only with -s or -S");
1178 
1179 	if (s_arg && S_arg)
1180 		die("the -s option cannot be used with -S");
1181 
1182 	/* get flow name (optional last argument */
1183 	if (optind == (argc-1)) {
1184 		if (strlcpy(flowname, argv[optind], MAXFLOWNAME)
1185 		    >= MAXFLOWNAME)
1186 			die("flow name too long");
1187 		state.fs_flow = flowname;
1188 	}
1189 
1190 	if (s_arg) {
1191 		flow_stats(state.fs_flow, linkid, interval);
1192 		return;
1193 	}
1194 
1195 	if (S_arg) {
1196 		dladm_continuous(handle, linkid, state.fs_flow, interval,
1197 		    FLOW_REPORT);
1198 		return;
1199 	}
1200 
1201 	if (!o_arg || (o_arg && strcasecmp(fields_str, "all") == 0))
1202 		fields_str = all_fields;
1203 
1204 	fields = parse_output_fields(fields_str, flow_fields, FLOW_MAX_FIELDS,
1205 	    CMD_TYPE_ANY, &nfields);
1206 
1207 	if (fields == NULL) {
1208 		die("invalid fields(s) specified");
1209 		return;
1210 	}
1211 
1212 	state.fs_print.ps_fields = fields;
1213 	state.fs_print.ps_nfields = nfields;
1214 
1215 	/* Show attributes of one flow */
1216 	if (state.fs_flow != NULL) {
1217 		show_one_flow(&state, state.fs_flow);
1218 
1219 	/* Show attributes of flows on one link */
1220 	} else if (l_arg) {
1221 		(void) show_flows_onelink(handle, linkid, &state);
1222 
1223 	/* Show attributes of all flows on all links */
1224 	} else {
1225 		(void) dladm_walk_datalink_id(show_flows_onelink, handle,
1226 		    &state, DATALINK_CLASS_ALL, DATALINK_ANY_MEDIATYPE,
1227 		    DLADM_OPT_ACTIVE);
1228 	}
1229 }
1230 
1231 static dladm_status_t
1232 set_flowprop_persist(const char *flow, const char *prop_name, char **prop_val,
1233     uint_t val_cnt, boolean_t reset)
1234 {
1235 	dladm_status_t	status;
1236 	char		*errprop;
1237 
1238 	status = dladm_set_flowprop(handle, flow, prop_name, prop_val, val_cnt,
1239 	    DLADM_OPT_PERSIST, &errprop);
1240 
1241 	if (status != DLADM_STATUS_OK) {
1242 		warn_dlerr(status, "cannot persistently %s flow "
1243 		    "property '%s' on '%s'", reset? "reset": "set",
1244 		    errprop, flow);
1245 	}
1246 	return (status);
1247 }
1248 
1249 static void
1250 set_flowprop(int argc, char **argv, boolean_t reset)
1251 {
1252 	int		i, option;
1253 	char		errmsg[DLADM_STRSIZE];
1254 	const char	*flow = NULL;
1255 	dladm_arg_list_t	*proplist = NULL;
1256 	boolean_t	temp = B_FALSE;
1257 	dladm_status_t	status = DLADM_STATUS_OK;
1258 
1259 	opterr = 0;
1260 	while ((option = getopt_long(argc, argv, ":p:R:t",
1261 	    prop_longopts, NULL)) != -1) {
1262 		switch (option) {
1263 		case 'p':
1264 			if (dladm_parse_flow_props(optarg, &proplist, reset)
1265 			    != DLADM_STATUS_OK)
1266 				die("invalid flow property specified");
1267 			break;
1268 		case 't':
1269 			temp = B_TRUE;
1270 			break;
1271 		case 'R':
1272 			status = dladm_set_rootdir(optarg);
1273 			if (status != DLADM_STATUS_OK) {
1274 				die_dlerr(status, "invalid directory "
1275 				    "specified");
1276 			}
1277 			break;
1278 		default:
1279 			die_opterr(optopt, option);
1280 			break;
1281 		}
1282 	}
1283 
1284 	if (optind == (argc - 1)) {
1285 		if (strlen(argv[optind]) >= MAXFLOWNAME)
1286 			die("flow name too long");
1287 		flow = argv[optind];
1288 	} else if (optind != argc) {
1289 		usage();
1290 	}
1291 	if (flow == NULL)
1292 		die("flow name must be specified");
1293 
1294 	if (proplist == NULL) {
1295 		char *errprop;
1296 
1297 		if (!reset)
1298 			die("flow property must be specified");
1299 
1300 		status = dladm_set_flowprop(handle, flow, NULL, NULL, 0,
1301 		    DLADM_OPT_ACTIVE, &errprop);
1302 		if (status != DLADM_STATUS_OK) {
1303 			warn_dlerr(status, "cannot reset flow property '%s' "
1304 			    "on '%s'", errprop, flow);
1305 		}
1306 		if (!temp) {
1307 			dladm_status_t	s;
1308 
1309 			s = set_flowprop_persist(flow, NULL, NULL, 0, reset);
1310 			if (s != DLADM_STATUS_OK)
1311 				status = s;
1312 		}
1313 		goto done;
1314 	}
1315 
1316 	for (i = 0; i < proplist->al_count; i++) {
1317 		dladm_arg_info_t	*aip = &proplist->al_info[i];
1318 		char		**val;
1319 		uint_t		count;
1320 		dladm_status_t	s;
1321 
1322 		if (reset) {
1323 			val = NULL;
1324 			count = 0;
1325 		} else {
1326 			val = aip->ai_val;
1327 			count = aip->ai_count;
1328 			if (count == 0) {
1329 				warn("no value specified for '%s'",
1330 				    aip->ai_name);
1331 				status = DLADM_STATUS_BADARG;
1332 				continue;
1333 			}
1334 		}
1335 		s = dladm_set_flowprop(handle, flow, aip->ai_name, val, count,
1336 		    DLADM_OPT_ACTIVE, NULL);
1337 		if (s == DLADM_STATUS_OK) {
1338 			if (!temp) {
1339 				s = set_flowprop_persist(flow,
1340 				    aip->ai_name, val, count, reset);
1341 				if (s != DLADM_STATUS_OK)
1342 					status = s;
1343 			}
1344 			continue;
1345 		}
1346 		status = s;
1347 		switch (s) {
1348 		case DLADM_STATUS_NOTFOUND:
1349 			warn("invalid flow property '%s'", aip->ai_name);
1350 			break;
1351 		case DLADM_STATUS_BADVAL: {
1352 			int		j;
1353 			char		*ptr, *lim;
1354 			char		**propvals = NULL;
1355 			uint_t		valcnt = DLADM_MAX_PROP_VALCNT;
1356 
1357 			ptr = malloc((sizeof (char *) +
1358 			    DLADM_PROP_VAL_MAX) * DLADM_MAX_PROP_VALCNT +
1359 			    MAX_PROP_LINE);
1360 
1361 			if (ptr == NULL)
1362 				die("insufficient memory");
1363 			propvals = (char **)(void *)ptr;
1364 
1365 			for (j = 0; j < DLADM_MAX_PROP_VALCNT; j++) {
1366 				propvals[j] = ptr + sizeof (char *) *
1367 				    DLADM_MAX_PROP_VALCNT +
1368 				    j * DLADM_PROP_VAL_MAX;
1369 			}
1370 			s = dladm_get_flowprop(handle, flow,
1371 			    DLADM_PROP_VAL_MODIFIABLE, aip->ai_name, propvals,
1372 			    &valcnt);
1373 
1374 			ptr = errmsg;
1375 			lim = ptr + DLADM_STRSIZE;
1376 			*ptr = '\0';
1377 			for (j = 0; j < valcnt && s == DLADM_STATUS_OK; j++) {
1378 				ptr += snprintf(ptr, lim - ptr, "%s,",
1379 				    propvals[j]);
1380 				if (ptr >= lim)
1381 					break;
1382 			}
1383 			if (ptr > errmsg) {
1384 				*(ptr - 1) = '\0';
1385 				warn("flow property '%s' must be one of: %s",
1386 				    aip->ai_name, errmsg);
1387 			} else
1388 				warn("%s is an invalid value for "
1389 				    "flow property %s", *val, aip->ai_name);
1390 			free(propvals);
1391 			break;
1392 		}
1393 		default:
1394 			if (reset) {
1395 				warn_dlerr(status, "cannot reset flow property "
1396 				    "'%s' on '%s'", aip->ai_name, flow);
1397 			} else {
1398 				warn_dlerr(status, "cannot set flow property "
1399 				    "'%s' on '%s'", aip->ai_name, flow);
1400 			}
1401 			break;
1402 		}
1403 	}
1404 done:
1405 	dladm_free_props(proplist);
1406 	if (status != DLADM_STATUS_OK) {
1407 		dladm_close(handle);
1408 		exit(1);
1409 	}
1410 }
1411 
1412 static void
1413 do_set_flowprop(int argc, char **argv)
1414 {
1415 	set_flowprop(argc, argv, B_FALSE);
1416 }
1417 
1418 static void
1419 do_reset_flowprop(int argc, char **argv)
1420 {
1421 	set_flowprop(argc, argv, B_TRUE);
1422 }
1423 
1424 static void
1425 warn(const char *format, ...)
1426 {
1427 	va_list alist;
1428 
1429 	format = gettext(format);
1430 	(void) fprintf(stderr, "%s: warning: ", progname);
1431 
1432 	va_start(alist, format);
1433 	(void) vfprintf(stderr, format, alist);
1434 	va_end(alist);
1435 
1436 	(void) putchar('\n');
1437 }
1438 
1439 /* PRINTFLIKE2 */
1440 static void
1441 warn_dlerr(dladm_status_t err, const char *format, ...)
1442 {
1443 	va_list alist;
1444 	char    errmsg[DLADM_STRSIZE];
1445 
1446 	format = gettext(format);
1447 	(void) fprintf(stderr, gettext("%s: warning: "), progname);
1448 
1449 	va_start(alist, format);
1450 	(void) vfprintf(stderr, format, alist);
1451 	va_end(alist);
1452 	(void) fprintf(stderr, ": %s\n", dladm_status2str(err, errmsg));
1453 }
1454 
1455 /* PRINTFLIKE1 */
1456 static void
1457 die(const char *format, ...)
1458 {
1459 	va_list alist;
1460 
1461 	format = gettext(format);
1462 	(void) fprintf(stderr, "%s: ", progname);
1463 
1464 	va_start(alist, format);
1465 	(void) vfprintf(stderr, format, alist);
1466 	va_end(alist);
1467 
1468 	(void) putchar('\n');
1469 
1470 	/* close dladm handle if it was opened */
1471 	if (handle != NULL)
1472 		dladm_close(handle);
1473 
1474 	exit(EXIT_FAILURE);
1475 }
1476 
1477 static void
1478 die_optdup(int opt)
1479 {
1480 	die("the option -%c cannot be specified more than once", opt);
1481 }
1482 
1483 static void
1484 die_opterr(int opt, int opterr)
1485 {
1486 	switch (opterr) {
1487 	case ':':
1488 		die("option '-%c' requires a value", opt);
1489 		break;
1490 	case '?':
1491 	default:
1492 		die("unrecognized option '-%c'", opt);
1493 		break;
1494 	}
1495 }
1496 
1497 /* PRINTFLIKE2 */
1498 static void
1499 die_dlerr(dladm_status_t err, const char *format, ...)
1500 {
1501 	va_list alist;
1502 	char	errmsg[DLADM_STRSIZE];
1503 
1504 	format = gettext(format);
1505 	(void) fprintf(stderr, "%s: ", progname);
1506 
1507 	va_start(alist, format);
1508 	(void) vfprintf(stderr, format, alist);
1509 	va_end(alist);
1510 	(void) fprintf(stderr, ": %s\n", dladm_status2str(err, errmsg));
1511 
1512 	/* close dladm handle if it was opened */
1513 	if (handle != NULL)
1514 		dladm_close(handle);
1515 
1516 	exit(EXIT_FAILURE);
1517 }
1518 
1519 static void
1520 print_flowprop(const char *flowname, show_flowprop_state_t *statep,
1521     const char *propname, dladm_prop_type_t type,
1522     const char *format, char **pptr)
1523 {
1524 	int		i;
1525 	char		*ptr, *lim;
1526 	char		buf[DLADM_STRSIZE];
1527 	char		*unknown = "--", *notsup = "";
1528 	char		**propvals = statep->fs_propvals;
1529 	uint_t		valcnt = DLADM_MAX_PROP_VALCNT;
1530 	dladm_status_t	status;
1531 
1532 	status = dladm_get_flowprop(handle, flowname, type, propname, propvals,
1533 	    &valcnt);
1534 	if (status != DLADM_STATUS_OK) {
1535 		if (status == DLADM_STATUS_TEMPONLY) {
1536 			if (type == DLADM_PROP_VAL_MODIFIABLE &&
1537 			    statep->fs_persist) {
1538 				valcnt = 1;
1539 				propvals = &unknown;
1540 			} else {
1541 				statep->fs_status = status;
1542 				statep->fs_retstatus = status;
1543 				return;
1544 			}
1545 		} else if (status == DLADM_STATUS_NOTSUP ||
1546 		    statep->fs_persist) {
1547 			valcnt = 1;
1548 			if (type == DLADM_PROP_VAL_CURRENT)
1549 				propvals = &unknown;
1550 			else
1551 				propvals = &notsup;
1552 		} else {
1553 			if ((statep->fs_proplist != NULL) &&
1554 			    statep->fs_status == DLADM_STATUS_OK) {
1555 				warn("invalid flow property '%s'", propname);
1556 			}
1557 			statep->fs_status = status;
1558 			statep->fs_retstatus = status;
1559 			return;
1560 		}
1561 	}
1562 
1563 	statep->fs_status = DLADM_STATUS_OK;
1564 
1565 	ptr = buf;
1566 	lim = buf + DLADM_STRSIZE;
1567 	for (i = 0; i < valcnt; i++) {
1568 		if (propvals[i][0] == '\0' && !statep->fs_parseable)
1569 			ptr += snprintf(ptr, lim - ptr, STR_UNDEF_VAL",");
1570 		else
1571 			ptr += snprintf(ptr, lim - ptr, "%s,", propvals[i]);
1572 		if (ptr >= lim)
1573 			break;
1574 	}
1575 	if (valcnt > 0)
1576 		buf[strlen(buf) - 1] = '\0';
1577 
1578 	lim = statep->fs_line + MAX_PROP_LINE;
1579 	if (statep->fs_parseable) {
1580 		*pptr += snprintf(*pptr, lim - *pptr,
1581 		    "%s", buf);
1582 	} else {
1583 		*pptr += snprintf(*pptr, lim - *pptr, format, buf);
1584 	}
1585 }
1586 
1587 static char *
1588 flowprop_callback(print_field_t *pf, void *fs_arg)
1589 {
1590 	flowprop_args_t		*arg = fs_arg;
1591 	char 			*propname = arg->fs_propname;
1592 	show_flowprop_state_t	*statep = arg->fs_state;
1593 	char			*ptr = statep->fs_line;
1594 	char			*lim = ptr + MAX_PROP_LINE;
1595 	char			*flowname = arg->fs_flowname;
1596 
1597 	switch (pf->pf_index) {
1598 	case FLOWPROP_FLOW:
1599 		(void) snprintf(ptr, lim - ptr, "%s", statep->fs_flow);
1600 		break;
1601 	case FLOWPROP_PROPERTY:
1602 		(void) snprintf(ptr, lim - ptr, "%s", propname);
1603 		break;
1604 	case FLOWPROP_VALUE:
1605 		print_flowprop(flowname, statep, propname,
1606 		    statep->fs_persist ? DLADM_PROP_VAL_PERSISTENT :
1607 		    DLADM_PROP_VAL_CURRENT, "%s", &ptr);
1608 		/*
1609 		 * If we failed to query the flow property, for example, query
1610 		 * the persistent value of a non-persistable flow property,
1611 		 * simply skip the output.
1612 		 */
1613 		if (statep->fs_status != DLADM_STATUS_OK)
1614 			goto skip;
1615 		ptr = statep->fs_line;
1616 		break;
1617 	case FLOWPROP_DEFAULT:
1618 		print_flowprop(flowname, statep, propname,
1619 		    DLADM_PROP_VAL_DEFAULT, "%s", &ptr);
1620 		if (statep->fs_status != DLADM_STATUS_OK)
1621 			goto skip;
1622 		ptr = statep->fs_line;
1623 		break;
1624 	case FLOWPROP_POSSIBLE:
1625 		print_flowprop(flowname, statep, propname,
1626 		    DLADM_PROP_VAL_MODIFIABLE, "%s ", &ptr);
1627 		if (statep->fs_status != DLADM_STATUS_OK)
1628 			goto skip;
1629 		ptr = statep->fs_line;
1630 		break;
1631 	default:
1632 		die("invalid input");
1633 		break;
1634 	}
1635 	return (ptr);
1636 skip:
1637 	if (statep->fs_status != DLADM_STATUS_OK)
1638 		return (NULL);
1639 	else
1640 		return ("");
1641 }
1642 
1643 static int
1644 show_one_flowprop(void *arg, const char *propname)
1645 {
1646 	show_flowprop_state_t	*statep = arg;
1647 	flowprop_args_t		fs_arg;
1648 
1649 	bzero(&fs_arg, sizeof (fs_arg));
1650 	fs_arg.fs_state = statep;
1651 	fs_arg.fs_propname = (char *)propname;
1652 	fs_arg.fs_flowname = (char *)statep->fs_flow;
1653 
1654 	if (statep->fs_header) {
1655 		statep->fs_header = B_FALSE;
1656 		if (!statep ->fs_parseable)
1657 			print_header(&statep->fs_print);
1658 	}
1659 	flowadm_print_output(&statep->fs_print, statep->fs_parseable,
1660 	    flowprop_callback, (void *)&fs_arg);
1661 
1662 	return (DLADM_WALK_CONTINUE);
1663 }
1664 
1665 /* Walker function called by dladm_walk_flow to display flow properties */
1666 static int
1667 show_flowprop(dladm_flow_attr_t *attr, void *arg)
1668 {
1669 	show_flowprop_one_flow(arg, attr->fa_flowname);
1670 	return (DLADM_WALK_CONTINUE);
1671 }
1672 
1673 /*
1674  * Wrapper of dladm_walk_flow(show_walk_fn,...) to make it
1675  * usable to dladm_walk_datalink_id()
1676  */
1677 static int
1678 show_flowprop_onelink(dladm_handle_t dh, datalink_id_t linkid, void *arg)
1679 {
1680 	char	name[MAXLINKNAMELEN];
1681 
1682 	if (dladm_datalink_id2info(dh, linkid, NULL, NULL, NULL, name,
1683 	    sizeof (name)) != DLADM_STATUS_OK)
1684 		return (DLADM_WALK_TERMINATE);
1685 
1686 	(void) dladm_walk_flow(show_flowprop, dh, linkid, arg, B_FALSE);
1687 
1688 	return (DLADM_WALK_CONTINUE);
1689 }
1690 
1691 static void
1692 do_show_flowprop(int argc, char **argv)
1693 {
1694 	int			option;
1695 	dladm_arg_list_t	*proplist = NULL;
1696 	show_flowprop_state_t	state;
1697 	char			*fields_str = NULL;
1698 	print_field_t		**fields;
1699 	uint_t			nfields;
1700 	char			*all_fields =
1701 	    "flow,property,value,default,possible";
1702 
1703 	fields_str = all_fields;
1704 	opterr = 0;
1705 	state.fs_propvals = NULL;
1706 	state.fs_line = NULL;
1707 	state.fs_parseable = B_FALSE;
1708 	state.fs_persist = B_FALSE;
1709 	state.fs_header = B_TRUE;
1710 	state.fs_retstatus = DLADM_STATUS_OK;
1711 	state.fs_linkid = DATALINK_INVALID_LINKID;
1712 	state.fs_flow = NULL;
1713 
1714 	while ((option = getopt_long(argc, argv, ":p:cPl:o:",
1715 	    prop_longopts, NULL)) != -1) {
1716 		switch (option) {
1717 		case 'p':
1718 			if (dladm_parse_flow_props(optarg, &proplist, B_TRUE)
1719 			    != DLADM_STATUS_OK)
1720 				die("invalid flow properties specified");
1721 			break;
1722 		case 'c':
1723 			state.fs_parseable = B_TRUE;
1724 			break;
1725 		case 'P':
1726 			state.fs_persist = B_TRUE;
1727 			break;
1728 		case 'l':
1729 			if (dladm_name2info(handle, optarg, &state.fs_linkid,
1730 			    NULL, NULL, NULL) != DLADM_STATUS_OK)
1731 				die("invalid link '%s'", optarg);
1732 			break;
1733 		case 'o':
1734 			if (strcasecmp(optarg, "all") == 0)
1735 				fields_str = all_fields;
1736 			else
1737 				fields_str = optarg;
1738 			break;
1739 		default:
1740 			die_opterr(optopt, option);
1741 			break;
1742 		}
1743 	}
1744 
1745 	if (optind == (argc - 1)) {
1746 		if (strlen(argv[optind]) >= MAXFLOWNAME)
1747 			die("flow name too long");
1748 		state.fs_flow = argv[optind];
1749 	} else if (optind != argc) {
1750 		usage();
1751 	}
1752 	bzero(&state.fs_print, sizeof (print_state_t));
1753 	state.fs_proplist = proplist;
1754 	state.fs_status = DLADM_STATUS_OK;
1755 
1756 	fields = parse_output_fields(fields_str, flowprop_fields,
1757 	    FLOWPROP_MAX_FIELDS, CMD_TYPE_ANY, &nfields);
1758 
1759 	if (fields == NULL) {
1760 		die("invalid field(s) specified");
1761 		return;
1762 	}
1763 
1764 	state.fs_print.ps_fields = fields;
1765 	state.fs_print.ps_nfields = nfields;
1766 
1767 	/* Show properties for one flow */
1768 	if (state.fs_flow != NULL) {
1769 		show_flowprop_one_flow(&state, state.fs_flow);
1770 
1771 	/* Show properties for all flows on one link */
1772 	} else if (state.fs_linkid != DATALINK_INVALID_LINKID) {
1773 		(void) show_flowprop_onelink(handle, state.fs_linkid, &state);
1774 
1775 	/* Show properties for all flows on all links */
1776 	} else {
1777 		(void) dladm_walk_datalink_id(show_flowprop_onelink, handle,
1778 		    &state, DATALINK_CLASS_ALL, DATALINK_ANY_MEDIATYPE,
1779 		    DLADM_OPT_ACTIVE);
1780 	}
1781 
1782 	dladm_free_props(proplist);
1783 }
1784 
1785 static void
1786 show_flowprop_one_flow(void *arg, const char *flow)
1787 {
1788 	int			i;
1789 	char			*buf;
1790 	dladm_status_t		status;
1791 	dladm_arg_list_t	*proplist = NULL;
1792 	show_flowprop_state_t	*statep = arg;
1793 	dladm_flow_attr_t	attr;
1794 	const char		*savep;
1795 
1796 	/*
1797 	 * Do not print flow props for invalid flows.
1798 	 */
1799 	if ((status = dladm_flow_info(handle, flow, &attr)) !=
1800 	    DLADM_STATUS_OK) {
1801 		die("invalid flow: '%s'", flow);
1802 	}
1803 
1804 	savep = statep->fs_flow;
1805 	statep->fs_flow = flow;
1806 
1807 	proplist = statep->fs_proplist;
1808 
1809 	buf = malloc((sizeof (char *) + DLADM_PROP_VAL_MAX)
1810 	    * DLADM_MAX_PROP_VALCNT + MAX_PROP_LINE);
1811 	if (buf == NULL)
1812 		die("insufficient memory");
1813 
1814 	statep->fs_propvals = (char **)(void *)buf;
1815 	for (i = 0; i < DLADM_MAX_PROP_VALCNT; i++) {
1816 		statep->fs_propvals[i] = buf +
1817 		    sizeof (char *) * DLADM_MAX_PROP_VALCNT +
1818 		    i * DLADM_PROP_VAL_MAX;
1819 	}
1820 	statep->fs_line = buf +
1821 	    (sizeof (char *) + DLADM_PROP_VAL_MAX) * DLADM_MAX_PROP_VALCNT;
1822 
1823 	/* show only specified flow properties */
1824 	if (proplist != NULL) {
1825 		for (i = 0; i < proplist->al_count; i++) {
1826 			if (show_one_flowprop(statep,
1827 			    proplist->al_info[i].ai_name) != DLADM_STATUS_OK)
1828 				break;
1829 		}
1830 
1831 	/* show all flow properties */
1832 	} else {
1833 		status = dladm_walk_flowprop(show_one_flowprop, flow, statep);
1834 		if (status != DLADM_STATUS_OK)
1835 			die_dlerr(status, "show-flowprop");
1836 	}
1837 	free(buf);
1838 	statep->fs_flow = savep;
1839 }
1840 
1841 typedef struct {
1842 	char	*s_buf;
1843 	char	**s_fields;	/* array of pointer to the fields in s_buf */
1844 	uint_t	s_nfields;	/* the number of fields in s_buf */
1845 } split_t;
1846 
1847 /*
1848  * Free the split_t structure pointed to by `sp'.
1849  */
1850 static void
1851 splitfree(split_t *sp)
1852 {
1853 	free(sp->s_buf);
1854 	free(sp->s_fields);
1855 	free(sp);
1856 }
1857 
1858 /*
1859  * Split `str' into at most `maxfields' fields, each field at most `maxlen' in
1860  * length.  Return a pointer to a split_t containing the split fields, or NULL
1861  * on failure.
1862  */
1863 static split_t *
1864 split(const char *str, uint_t maxfields, uint_t maxlen)
1865 {
1866 	char	*field, *token, *lasts = NULL;
1867 	split_t	*sp;
1868 
1869 	if (*str == '\0' || maxfields == 0 || maxlen == 0)
1870 		return (NULL);
1871 
1872 	sp = calloc(sizeof (split_t), 1);
1873 	if (sp == NULL)
1874 		return (NULL);
1875 
1876 	sp->s_buf = strdup(str);
1877 	sp->s_fields = malloc(sizeof (char *) * maxfields);
1878 	if (sp->s_buf == NULL || sp->s_fields == NULL)
1879 		goto fail;
1880 
1881 	token = sp->s_buf;
1882 	while ((field = strtok_r(token, ",", &lasts)) != NULL) {
1883 		if (sp->s_nfields == maxfields || strlen(field) > maxlen)
1884 			goto fail;
1885 		token = NULL;
1886 		sp->s_fields[sp->s_nfields++] = field;
1887 	}
1888 	return (sp);
1889 fail:
1890 	splitfree(sp);
1891 	return (NULL);
1892 }
1893 
1894 static print_field_t **
1895 parse_output_fields(char *str, print_field_t *template, int max_fields,
1896     uint_t cmdtype, uint_t *countp)
1897 {
1898 	split_t		*sp;
1899 	boolean_t	good_match = B_FALSE;
1900 	uint_t		i, j;
1901 	print_field_t	**pf = NULL;
1902 
1903 	sp = split(str, max_fields, MAX_FIELD_LEN);
1904 
1905 	if (sp == NULL)
1906 		return (NULL);
1907 
1908 	pf = malloc(sp->s_nfields * sizeof (print_field_t *));
1909 	if (pf == NULL)
1910 		goto fail;
1911 
1912 	for (i = 0; i < sp->s_nfields; i++) {
1913 		for (j = 0; j < max_fields; j++) {
1914 			if (strcasecmp(sp->s_fields[i],
1915 			    template[j].pf_name) == 0) {
1916 				good_match = template[j]. pf_cmdtype & cmdtype;
1917 				break;
1918 			}
1919 		}
1920 		if (!good_match)
1921 			goto fail;
1922 
1923 		good_match = B_FALSE;
1924 		pf[i] = &template[j];
1925 	}
1926 	*countp = i;
1927 	splitfree(sp);
1928 	return (pf);
1929 fail:
1930 	free(pf);
1931 	splitfree(sp);
1932 	return (NULL);
1933 }
1934 
1935 static void
1936 flowadm_print_output(print_state_t *statep, boolean_t parseable,
1937     print_callback_t fn, void *arg)
1938 {
1939 	int i;
1940 	char *value;
1941 	print_field_t **pf;
1942 
1943 	pf = statep->ps_fields;
1944 	for (i = 0; i < statep->ps_nfields; i++) {
1945 		statep->ps_lastfield = (i + 1 == statep->ps_nfields);
1946 		value = (*fn)(pf[i], arg);
1947 		if (value != NULL)
1948 			print_field(statep, pf[i], value, parseable);
1949 	}
1950 	(void) putchar('\n');
1951 }
1952 
1953 static void
1954 print_header(print_state_t *ps)
1955 {
1956 	int i;
1957 	print_field_t **pf;
1958 
1959 	pf = ps->ps_fields;
1960 	for (i = 0; i < ps->ps_nfields; i++) {
1961 		ps->ps_lastfield = (i + 1 == ps->ps_nfields);
1962 		print_field(ps, pf[i], pf[i]->pf_header, B_FALSE);
1963 	}
1964 	(void) putchar('\n');
1965 }
1966 
1967 static void
1968 print_field(print_state_t *statep, print_field_t *pfp, const char *value,
1969     boolean_t parseable)
1970 {
1971 	uint_t	width = pfp->pf_width;
1972 	uint_t	valwidth = strlen(value);
1973 	uint_t	compress;
1974 
1975 	if (parseable) {
1976 		(void) printf("%s=\"%s\"", pfp->pf_header, value);
1977 	} else {
1978 		if (value[0] == '\0')
1979 			value = STR_UNDEF_VAL;
1980 		if (statep->ps_lastfield) {
1981 			(void) printf("%s", value);
1982 			return;
1983 		}
1984 
1985 		if (valwidth > width) {
1986 			statep->ps_overflow += valwidth - width;
1987 		} else if (valwidth < width && statep->ps_overflow > 0) {
1988 			compress = min(statep->ps_overflow, width - valwidth);
1989 			statep->ps_overflow -= compress;
1990 			width -= compress;
1991 		}
1992 		(void) printf("%-*s", width, value);
1993 	}
1994 
1995 	if (!statep->ps_lastfield)
1996 		(void) putchar(' ');
1997 }
1998