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Commit | Line | Data |
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5b84789f | 1 | /* $Id$ */ |
2 | ||
3 | /* | |
4 | * Copyright (c) 2006 Chad Mynhier. | |
5 | * | |
6 | * Permission to use, copy, modify, and distribute this software for any | |
7 | * purpose with or without fee is hereby granted, provided that the above | |
8 | * copyright notice and this permission notice appear in all copies. | |
9 | * | |
10 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
11 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
12 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
13 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
14 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
15 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
16 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
17 | */ | |
18 | ||
19 | #include "config.h" | |
20 | #include "includes.h" | |
21 | ||
22 | #ifdef USE_SOLARIS_PROCESS_CONTRACTS | |
23 | ||
24 | #include <sys/types.h> | |
25 | #include <sys/stat.h> | |
26 | #include <sys/param.h> | |
27 | ||
28 | #include <errno.h> | |
29 | #ifdef HAVE_FCNTL_H | |
30 | # include <fcntl.h> | |
31 | #endif | |
32 | #include <string.h> | |
33 | #include <unistd.h> | |
34 | ||
35 | #include <libcontract.h> | |
36 | #include <sys/contract/process.h> | |
37 | #include <sys/ctfs.h> | |
38 | ||
39 | #include "log.h" | |
40 | ||
41 | #define CT_TEMPLATE CTFS_ROOT "/process/template" | |
42 | #define CT_LATEST CTFS_ROOT "/process/latest" | |
43 | ||
44 | static int tmpl_fd = -1; | |
45 | ||
46 | /* Lookup the latest process contract */ | |
47 | static ctid_t | |
48 | get_active_process_contract_id(void) | |
49 | { | |
50 | int stat_fd; | |
51 | ctid_t ctid = -1; | |
52 | ct_stathdl_t stathdl; | |
53 | ||
54 | if ((stat_fd = open64(CT_LATEST, O_RDONLY)) == -1) { | |
55 | error("%s: Error opening 'latest' process " | |
56 | "contract: %s", __func__, strerror(errno)); | |
57 | return -1; | |
58 | } | |
59 | if (ct_status_read(stat_fd, CTD_COMMON, &stathdl) != 0) { | |
60 | error("%s: Error reading process contract " | |
61 | "status: %s", __func__, strerror(errno)); | |
62 | goto out; | |
63 | } | |
64 | if ((ctid = ct_status_get_id(stathdl)) < 0) { | |
65 | error("%s: Error getting process contract id: %s", | |
66 | __func__, strerror(errno)); | |
67 | goto out; | |
68 | } | |
69 | ||
70 | ct_status_free(stathdl); | |
71 | out: | |
72 | close(stat_fd); | |
73 | return ctid; | |
74 | } | |
75 | ||
76 | void | |
77 | solaris_contract_pre_fork(void) | |
78 | { | |
79 | if ((tmpl_fd = open64(CT_TEMPLATE, O_RDWR)) == -1) { | |
80 | error("%s: open %s: %s", __func__, | |
81 | CT_TEMPLATE, strerror(errno)); | |
82 | return; | |
83 | } | |
84 | ||
85 | debug2("%s: setting up process contract template on fd %d", | |
86 | __func__, tmpl_fd); | |
87 | ||
88 | /* We have to set certain attributes before activating the template */ | |
89 | if (ct_pr_tmpl_set_fatal(tmpl_fd, | |
90 | CT_PR_EV_HWERR|CT_PR_EV_SIGNAL|CT_PR_EV_CORE) != 0) { | |
91 | error("%s: Error setting process contract template " | |
92 | "fatal events: %s", __func__, strerror(errno)); | |
93 | goto fail; | |
94 | } | |
95 | if (ct_tmpl_set_critical(tmpl_fd, CT_PR_EV_HWERR) != 0) { | |
96 | error("%s: Error setting process contract template " | |
97 | "critical events: %s", __func__, strerror(errno)); | |
98 | goto fail; | |
99 | } | |
100 | ||
101 | /* Now make this the active template for this process. */ | |
102 | if (ct_tmpl_activate(tmpl_fd) != 0) { | |
103 | error("%s: Error activating process contract " | |
104 | "template: %s", __func__, strerror(errno)); | |
105 | goto fail; | |
106 | } | |
107 | return; | |
108 | ||
109 | fail: | |
110 | if (tmpl_fd != -1) { | |
111 | close(tmpl_fd); | |
112 | tmpl_fd = -1; | |
113 | } | |
114 | } | |
115 | ||
116 | void | |
117 | solaris_contract_post_fork_child() | |
118 | { | |
119 | debug2("%s: clearing process contract template on fd %d", | |
120 | __func__, tmpl_fd); | |
121 | ||
122 | /* Clear the active template. */ | |
123 | if (ct_tmpl_clear(tmpl_fd) != 0) | |
124 | error("%s: Error clearing active process contract " | |
125 | "template: %s", __func__, strerror(errno)); | |
126 | ||
127 | close(tmpl_fd); | |
128 | tmpl_fd = -1; | |
129 | } | |
130 | ||
131 | void | |
132 | solaris_contract_post_fork_parent(pid_t pid) | |
133 | { | |
134 | ctid_t ctid; | |
135 | char ctl_path[256]; | |
136 | int r, ctl_fd = -1, stat_fd = -1; | |
137 | ||
138 | debug2("%s: clearing template (fd %d)", __func__, tmpl_fd); | |
139 | ||
140 | if (tmpl_fd == -1) | |
141 | return; | |
142 | ||
143 | /* First clear the active template. */ | |
144 | if ((r = ct_tmpl_clear(tmpl_fd)) != 0) | |
145 | error("%s: Error clearing active process contract " | |
146 | "template: %s", __func__, strerror(errno)); | |
147 | ||
148 | close(tmpl_fd); | |
149 | tmpl_fd = -1; | |
150 | ||
151 | /* | |
152 | * If either the fork didn't succeed (pid < 0), or clearing | |
153 | * th active contract failed (r != 0), then we have nothing | |
154 | * more do. | |
155 | */ | |
156 | if (r != 0 || pid <= 0) | |
157 | return; | |
158 | ||
159 | /* Now lookup and abandon the contract we've created. */ | |
160 | ctid = get_active_process_contract_id(); | |
161 | ||
162 | debug2("%s: abandoning contract id %ld", __func__, ctid); | |
163 | ||
164 | snprintf(ctl_path, sizeof(ctl_path), | |
165 | CTFS_ROOT "/process/%ld/ctl", ctid); | |
166 | if ((ctl_fd = open64(ctl_path, O_WRONLY)) < 0) { | |
167 | error("%s: Error opening process contract " | |
168 | "ctl file: %s", __func__, strerror(errno)); | |
169 | goto fail; | |
170 | } | |
171 | if (ct_ctl_abandon(ctl_fd) < 0) { | |
172 | error("%s: Error abandoning process contract: %s", | |
173 | __func__, strerror(errno)); | |
174 | goto fail; | |
175 | } | |
176 | close(ctl_fd); | |
177 | return; | |
178 | ||
179 | fail: | |
180 | if (tmpl_fd != -1) { | |
181 | close(tmpl_fd); | |
182 | tmpl_fd = -1; | |
183 | } | |
184 | if (stat_fd != -1) | |
185 | close(stat_fd); | |
186 | if (ctl_fd != -1) | |
187 | close(ctl_fd); | |
188 | } | |
189 | #endif |