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 2006 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 #include <procfs.h>
29 #include <project.h>
30 #include <stdlib.h>
31 #include <strings.h>
32 #include "rcapd.h"
33 #include "utils.h"
34 
35 				/* absolute cap name */
36 #define	PJ_ABS_ATTR_NAME	"rcap.max-rss"
37 				/* round up to next y = 2^n */
38 #define	ROUNDUP(x, y)		(((x) + ((y) - 1)) & ~((y) - 1))
39 
40 static int
lcollection_update_project_cb(const struct project * proj,void * walk_data)41 lcollection_update_project_cb(const struct project *proj, void *walk_data)
42 {
43 	void(*update_notification_cb)(char *, char *, int, uint64_t, int) =
44 	    (void(*)(char *, char *, int, uint64_t, int))walk_data;
45 	char *capattr_abs;
46 	char *end;
47 	int changes;
48 	int64_t max_rss;
49 	lcollection_t *lcol;
50 	rcid_t colid;
51 
52 	capattr_abs = strstr(proj->pj_attr, PJ_ABS_ATTR_NAME "=");
53 	if (capattr_abs != NULL) {
54 		if (capattr_abs > proj->pj_attr)
55 			if (*(capattr_abs - 1) != ';') {
56 				/*
57 				 * PJ_ABS_ATTR_NAME only matched part
58 				 * of an attribute.
59 				 */
60 				return (0);
61 			}
62 		capattr_abs += strlen(PJ_ABS_ATTR_NAME "=");
63 		max_rss = ROUNDUP(strtoll(capattr_abs, &end, 10), 1024) / 1024;
64 		if (end == capattr_abs || *end != ';' && *end != 0)
65 			warn(gettext("project %s: malformed %s value '%s'\n"),
66 			    proj->pj_name, PJ_ABS_ATTR_NAME, capattr_abs);
67 	} else
68 		max_rss = 0;
69 
70 	colid.rcid_type = RCIDT_PROJECT;
71 	colid.rcid_val = proj->pj_projid;
72 
73 	lcol = lcollection_insert_update(&colid, max_rss, proj->pj_name,
74 	    &changes);
75 	if (update_notification_cb != NULL)
76 		update_notification_cb("project", proj->pj_name, changes,
77 		    max_rss, (lcol != NULL) ? lcol->lcol_mark : 0);
78 
79 	return (0);
80 }
81 
82 static int
lcollection_update_project_byid_cb(const projid_t id,void * walk_data)83 lcollection_update_project_byid_cb(const projid_t id, void *walk_data)
84 {
85 	char buf[PROJECT_BUFSZ];
86 	struct project proj;
87 
88 	if (getprojbyid(id, &proj, buf, sizeof (buf)) != NULL && proj.pj_attr !=
89 	    NULL)
90 		return (lcollection_update_project_cb(&proj, walk_data));
91 
92 	return (0);
93 }
94 
95 static int
lcollection_update_onceactive_cb(lcollection_t * lcol,void * walk_data)96 lcollection_update_onceactive_cb(lcollection_t *lcol, void *walk_data)
97 {
98 	void(*update_notification_cb)(char *, char *, int, uint64_t, int) =
99 	    (void(*)(char *, char *, int, uint64_t, int))walk_data;
100 
101 	if (lcol->lcol_id.rcid_type != RCIDT_PROJECT)
102 		return (0);
103 
104 	return (lcollection_update_project_byid_cb(lcol->lcol_id.rcid_val,
105 	    (void *)update_notification_cb));
106 }
107 
108 static int
project_walk_all(int (* cb)(const struct project *,void *),void * walk_data)109 project_walk_all(int(*cb)(const struct project *, void *), void *walk_data)
110 {
111 	char buf[PROJECT_BUFSZ];
112 	struct project proj;
113 	int res = 0;
114 
115 	setprojent();
116 	while (getprojent(&proj, buf, sizeof (buf)) != NULL && res == 0)
117 		res = cb(&proj, walk_data);
118 	endprojent();
119 
120 	return (res);
121 }
122 
123 void
lcollection_update_project(lcollection_update_type_t ut,void (* update_notification_cb)(char *,char *,int,uint64_t,int))124 lcollection_update_project(lcollection_update_type_t ut,
125     void(*update_notification_cb)(char *, char *, int, uint64_t, int))
126 {
127 	switch (ut) {
128 	case LCU_ACTIVE_ONLY:
129 		/*
130 		 * Enumerate active projects.  This is much faster than
131 		 * enumerating all projects (as is done below, in the default
132 		 * case), and is done to efficiently and incrementally update
133 		 * lcollection with capped projects.  The default case performs
134 		 * the initialization.
135 		 */
136 		(void) project_walk(lcollection_update_project_byid_cb,
137 		    (void *)update_notification_cb);
138 		/*
139 		 * Enumerate once-active projects, including the active
140 		 * projects just enumerated, meaning active projects will be
141 		 * updated and marked twice.
142 		 */
143 		list_walk_collection(lcollection_update_onceactive_cb,
144 		    (void *)update_notification_cb);
145 		break;
146 	default:
147 		/*
148 		 * Enumerate all projects.
149 		 */
150 		(void) project_walk_all(lcollection_update_project_cb,
151 		    (void *)update_notification_cb);
152 	}
153 }
154