1 /* $Id: port-solaris.c,v 1.2 2006/09/01 05:38:41 djm Exp $ */ 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 <stdarg.h> 33 #include <string.h> 34 #include <unistd.h> 35 36 #include <libcontract.h> 37 #include <sys/contract/process.h> 38 #include <sys/ctfs.h> 39 40 #include "log.h" 41 42 #define CT_TEMPLATE CTFS_ROOT "/process/template" 43 #define CT_LATEST CTFS_ROOT "/process/latest" 44 45 static int tmpl_fd = -1; 46 47 /* Lookup the latest process contract */ 48 static ctid_t 49 get_active_process_contract_id(void) 50 { 51 int stat_fd; 52 ctid_t ctid = -1; 53 ct_stathdl_t stathdl; 54 55 if ((stat_fd = open64(CT_LATEST, O_RDONLY)) == -1) { 56 error("%s: Error opening 'latest' process " 57 "contract: %s", __func__, strerror(errno)); 58 return -1; 59 } 60 if (ct_status_read(stat_fd, CTD_COMMON, &stathdl) != 0) { 61 error("%s: Error reading process contract " 62 "status: %s", __func__, strerror(errno)); 63 goto out; 64 } 65 if ((ctid = ct_status_get_id(stathdl)) < 0) { 66 error("%s: Error getting process contract id: %s", 67 __func__, strerror(errno)); 68 goto out; 69 } 70 71 ct_status_free(stathdl); 72 out: 73 close(stat_fd); 74 return ctid; 75 } 76 77 void 78 solaris_contract_pre_fork(void) 79 { 80 if ((tmpl_fd = open64(CT_TEMPLATE, O_RDWR)) == -1) { 81 error("%s: open %s: %s", __func__, 82 CT_TEMPLATE, strerror(errno)); 83 return; 84 } 85 86 debug2("%s: setting up process contract template on fd %d", 87 __func__, tmpl_fd); 88 89 /* We have to set certain attributes before activating the template */ 90 if (ct_pr_tmpl_set_fatal(tmpl_fd, 91 CT_PR_EV_HWERR|CT_PR_EV_SIGNAL|CT_PR_EV_CORE) != 0) { 92 error("%s: Error setting process contract template " 93 "fatal events: %s", __func__, strerror(errno)); 94 goto fail; 95 } 96 if (ct_tmpl_set_critical(tmpl_fd, CT_PR_EV_HWERR) != 0) { 97 error("%s: Error setting process contract template " 98 "critical events: %s", __func__, strerror(errno)); 99 goto fail; 100 } 101 102 /* Now make this the active template for this process. */ 103 if (ct_tmpl_activate(tmpl_fd) != 0) { 104 error("%s: Error activating process contract " 105 "template: %s", __func__, strerror(errno)); 106 goto fail; 107 } 108 return; 109 110 fail: 111 if (tmpl_fd != -1) { 112 close(tmpl_fd); 113 tmpl_fd = -1; 114 } 115 } 116 117 void 118 solaris_contract_post_fork_child() 119 { 120 debug2("%s: clearing process contract template on fd %d", 121 __func__, tmpl_fd); 122 123 /* Clear the active template. */ 124 if (ct_tmpl_clear(tmpl_fd) != 0) 125 error("%s: Error clearing active process contract " 126 "template: %s", __func__, strerror(errno)); 127 128 close(tmpl_fd); 129 tmpl_fd = -1; 130 } 131 132 void 133 solaris_contract_post_fork_parent(pid_t pid) 134 { 135 ctid_t ctid; 136 char ctl_path[256]; 137 int r, ctl_fd = -1, stat_fd = -1; 138 139 debug2("%s: clearing template (fd %d)", __func__, tmpl_fd); 140 141 if (tmpl_fd == -1) 142 return; 143 144 /* First clear the active template. */ 145 if ((r = ct_tmpl_clear(tmpl_fd)) != 0) 146 error("%s: Error clearing active process contract " 147 "template: %s", __func__, strerror(errno)); 148 149 close(tmpl_fd); 150 tmpl_fd = -1; 151 152 /* 153 * If either the fork didn't succeed (pid < 0), or clearing 154 * th active contract failed (r != 0), then we have nothing 155 * more do. 156 */ 157 if (r != 0 || pid <= 0) 158 return; 159 160 /* Now lookup and abandon the contract we've created. */ 161 ctid = get_active_process_contract_id(); 162 163 debug2("%s: abandoning contract id %ld", __func__, ctid); 164 165 snprintf(ctl_path, sizeof(ctl_path), 166 CTFS_ROOT "/process/%ld/ctl", ctid); 167 if ((ctl_fd = open64(ctl_path, O_WRONLY)) < 0) { 168 error("%s: Error opening process contract " 169 "ctl file: %s", __func__, strerror(errno)); 170 goto fail; 171 } 172 if (ct_ctl_abandon(ctl_fd) < 0) { 173 error("%s: Error abandoning process contract: %s", 174 __func__, strerror(errno)); 175 goto fail; 176 } 177 close(ctl_fd); 178 return; 179 180 fail: 181 if (tmpl_fd != -1) { 182 close(tmpl_fd); 183 tmpl_fd = -1; 184 } 185 if (stat_fd != -1) 186 close(stat_fd); 187 if (ctl_fd != -1) 188 close(ctl_fd); 189 } 190 #endif 191