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 2010 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * Flows ioctls implementation.
28 */
29
30 #include <sys/cred.h>
31 #include <sys/dld.h>
32 #include <sys/mac_provider.h>
33 #include <sys/mac_client.h>
34 #include <sys/mac_client_priv.h>
35
36 /*
37 * Implements flow add, remove, modify ioctls.
38 */
39 int
dld_add_flow(datalink_id_t linkid,char * flow_name,flow_desc_t * flow_desc,mac_resource_props_t * mrp)40 dld_add_flow(datalink_id_t linkid, char *flow_name, flow_desc_t *flow_desc,
41 mac_resource_props_t *mrp)
42 {
43 return (mac_link_flow_add(linkid, flow_name, flow_desc, mrp));
44 }
45
46 int
dld_remove_flow(char * flow_name)47 dld_remove_flow(char *flow_name)
48 {
49 return (mac_link_flow_remove(flow_name));
50 }
51
52 int
dld_modify_flow(char * flow_name,mac_resource_props_t * mrp)53 dld_modify_flow(char *flow_name, mac_resource_props_t *mrp)
54 {
55 return (mac_link_flow_modify(flow_name, mrp));
56 }
57
58
59 /*
60 * Callback function and structure used by dld_walk_flow().
61 */
62 typedef struct flowinfo_state_s {
63 int fi_bufsize;
64 int fi_nflows;
65 uchar_t *fi_fl;
66 } flowinfo_state_t;
67
68 static int
dld_walk_flow_cb(mac_flowinfo_t * finfo,void * arg)69 dld_walk_flow_cb(mac_flowinfo_t *finfo, void *arg)
70 {
71 flowinfo_state_t *statep = arg;
72 dld_flowinfo_t *fi;
73
74 if (statep->fi_bufsize < sizeof (dld_flowinfo_t))
75 return (ENOSPC);
76
77 fi = kmem_zalloc(sizeof (*fi), KM_SLEEP);
78 (void) strlcpy(fi->fi_flowname, finfo->fi_flow_name,
79 sizeof (fi->fi_flowname));
80 fi->fi_linkid = finfo->fi_link_id;
81 fi->fi_flow_desc = finfo->fi_flow_desc;
82 fi->fi_resource_props = finfo->fi_resource_props;
83
84 if (copyout(fi, statep->fi_fl, sizeof (*fi)) != 0) {
85 kmem_free(fi, sizeof (*fi));
86 return (EFAULT);
87 }
88 kmem_free(fi, sizeof (*fi));
89 statep->fi_nflows++;
90 statep->fi_bufsize -= sizeof (dld_flowinfo_t);
91 statep->fi_fl += sizeof (dld_flowinfo_t);
92 return (0);
93 }
94
95 /*
96 * Implements flow walk ioctl.
97 * Retrieves a specific flow or a list of flows from the specified link.
98 * ENOSPC is returned a bigger buffer is needed.
99 */
100 int
dld_walk_flow(dld_ioc_walkflow_t * wf,intptr_t uaddr,cred_t * credp)101 dld_walk_flow(dld_ioc_walkflow_t *wf, intptr_t uaddr, cred_t *credp)
102 {
103 flowinfo_state_t state;
104 mac_flowinfo_t *finfo;
105 int err = 0;
106
107 /* For now, one can only view flows from the global zone. */
108 if (crgetzoneid(credp) != GLOBAL_ZONEID)
109 return (EPERM);
110
111 finfo = kmem_zalloc(sizeof (*finfo), KM_SLEEP);
112 state.fi_bufsize = wf->wf_len;
113 state.fi_fl = (uchar_t *)uaddr + sizeof (*wf);
114 state.fi_nflows = 0;
115
116 if (wf->wf_name[0] == '\0') {
117 err = mac_link_flow_walk(wf->wf_linkid, dld_walk_flow_cb,
118 &state);
119 } else {
120 err = mac_link_flow_info(wf->wf_name, finfo);
121 if (err != 0) {
122 kmem_free(finfo, sizeof (*finfo));
123 return (err);
124 }
125 err = dld_walk_flow_cb(finfo, &state);
126 }
127 kmem_free(finfo, sizeof (*finfo));
128 wf->wf_nflows = state.fi_nflows;
129 return (err);
130 }
131