1ec125fbbSEdward Tomasz Napierala /*- 2ec125fbbSEdward Tomasz Napierala * Copyright (c) 2010 The FreeBSD Foundation 3ec125fbbSEdward Tomasz Napierala * All rights reserved. 4ec125fbbSEdward Tomasz Napierala * 5ec125fbbSEdward Tomasz Napierala * This software was developed by Edward Tomasz Napierala under sponsorship 6ec125fbbSEdward Tomasz Napierala * from the FreeBSD Foundation. 7ec125fbbSEdward Tomasz Napierala * 8ec125fbbSEdward Tomasz Napierala * Redistribution and use in source and binary forms, with or without 9ec125fbbSEdward Tomasz Napierala * modification, are permitted provided that the following conditions 10ec125fbbSEdward Tomasz Napierala * are met: 11ec125fbbSEdward Tomasz Napierala * 1. Redistributions of source code must retain the above copyright 12ec125fbbSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer. 13ec125fbbSEdward Tomasz Napierala * 2. Redistributions in binary form must reproduce the above copyright 14ec125fbbSEdward Tomasz Napierala * notice, this list of conditions and the following disclaimer in the 15ec125fbbSEdward Tomasz Napierala * documentation and/or other materials provided with the distribution. 16ec125fbbSEdward Tomasz Napierala * 17ec125fbbSEdward Tomasz Napierala * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18ec125fbbSEdward Tomasz Napierala * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19ec125fbbSEdward Tomasz Napierala * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20ec125fbbSEdward Tomasz Napierala * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21ec125fbbSEdward Tomasz Napierala * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22ec125fbbSEdward Tomasz Napierala * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23ec125fbbSEdward Tomasz Napierala * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24ec125fbbSEdward Tomasz Napierala * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25ec125fbbSEdward Tomasz Napierala * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26ec125fbbSEdward Tomasz Napierala * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27ec125fbbSEdward Tomasz Napierala * SUCH DAMAGE. 28ec125fbbSEdward Tomasz Napierala * 29ec125fbbSEdward Tomasz Napierala * $FreeBSD$ 30ec125fbbSEdward Tomasz Napierala */ 31ec125fbbSEdward Tomasz Napierala 32ec125fbbSEdward Tomasz Napierala #include <sys/cdefs.h> 33ec125fbbSEdward Tomasz Napierala __FBSDID("$FreeBSD$"); 34ec125fbbSEdward Tomasz Napierala 35ec125fbbSEdward Tomasz Napierala #include <sys/param.h> 36ec125fbbSEdward Tomasz Napierala #include <sys/bus.h> 37ec125fbbSEdward Tomasz Napierala #include <sys/malloc.h> 38ec125fbbSEdward Tomasz Napierala #include <sys/queue.h> 39ec125fbbSEdward Tomasz Napierala #include <sys/refcount.h> 40ec125fbbSEdward Tomasz Napierala #include <sys/jail.h> 41ec125fbbSEdward Tomasz Napierala #include <sys/kernel.h> 42ec125fbbSEdward Tomasz Napierala #include <sys/limits.h> 43ec125fbbSEdward Tomasz Napierala #include <sys/loginclass.h> 44ec125fbbSEdward Tomasz Napierala #include <sys/priv.h> 45ec125fbbSEdward Tomasz Napierala #include <sys/proc.h> 46ec125fbbSEdward Tomasz Napierala #include <sys/racct.h> 47ec125fbbSEdward Tomasz Napierala #include <sys/rctl.h> 48ec125fbbSEdward Tomasz Napierala #include <sys/resourcevar.h> 49ec125fbbSEdward Tomasz Napierala #include <sys/sx.h> 50ec125fbbSEdward Tomasz Napierala #include <sys/sysent.h> 51ec125fbbSEdward Tomasz Napierala #include <sys/sysproto.h> 52ec125fbbSEdward Tomasz Napierala #include <sys/systm.h> 53ec125fbbSEdward Tomasz Napierala #include <sys/types.h> 54ec125fbbSEdward Tomasz Napierala #include <sys/eventhandler.h> 55ec125fbbSEdward Tomasz Napierala #include <sys/lock.h> 56ec125fbbSEdward Tomasz Napierala #include <sys/mutex.h> 57ec125fbbSEdward Tomasz Napierala #include <sys/rwlock.h> 58ec125fbbSEdward Tomasz Napierala #include <sys/sbuf.h> 59ec125fbbSEdward Tomasz Napierala #include <sys/taskqueue.h> 60ec125fbbSEdward Tomasz Napierala #include <sys/tree.h> 61ec125fbbSEdward Tomasz Napierala #include <vm/uma.h> 62ec125fbbSEdward Tomasz Napierala 63ec125fbbSEdward Tomasz Napierala #ifdef RCTL 64ec125fbbSEdward Tomasz Napierala #ifndef RACCT 65ec125fbbSEdward Tomasz Napierala #error "The RCTL option requires the RACCT option" 66ec125fbbSEdward Tomasz Napierala #endif 67ec125fbbSEdward Tomasz Napierala 68ec125fbbSEdward Tomasz Napierala FEATURE(rctl, "Resource Limits"); 69ec125fbbSEdward Tomasz Napierala 70ec125fbbSEdward Tomasz Napierala #define HRF_DEFAULT 0 71ec125fbbSEdward Tomasz Napierala #define HRF_DONT_INHERIT 1 72ec125fbbSEdward Tomasz Napierala #define HRF_DONT_ACCUMULATE 2 73ec125fbbSEdward Tomasz Napierala 74ec125fbbSEdward Tomasz Napierala /* Default buffer size for rctl_get_rules(2). */ 75ec125fbbSEdward Tomasz Napierala #define RCTL_DEFAULT_BUFSIZE 4096 76ec125fbbSEdward Tomasz Napierala #define RCTL_LOG_BUFSIZE 128 77ec125fbbSEdward Tomasz Napierala 78ec125fbbSEdward Tomasz Napierala /* 79ec125fbbSEdward Tomasz Napierala * 'rctl_rule_link' connects a rule with every racct it's related to. 80ec125fbbSEdward Tomasz Napierala * For example, rule 'user:X:openfiles:deny=N/process' is linked 81ec125fbbSEdward Tomasz Napierala * with uidinfo for user X, and to each process of that user. 82ec125fbbSEdward Tomasz Napierala */ 83ec125fbbSEdward Tomasz Napierala struct rctl_rule_link { 84ec125fbbSEdward Tomasz Napierala LIST_ENTRY(rctl_rule_link) rrl_next; 85ec125fbbSEdward Tomasz Napierala struct rctl_rule *rrl_rule; 86ec125fbbSEdward Tomasz Napierala int rrl_exceeded; 87ec125fbbSEdward Tomasz Napierala }; 88ec125fbbSEdward Tomasz Napierala 89ec125fbbSEdward Tomasz Napierala struct dict { 90ec125fbbSEdward Tomasz Napierala const char *d_name; 91ec125fbbSEdward Tomasz Napierala int d_value; 92ec125fbbSEdward Tomasz Napierala }; 93ec125fbbSEdward Tomasz Napierala 94ec125fbbSEdward Tomasz Napierala static struct dict subjectnames[] = { 95ec125fbbSEdward Tomasz Napierala { "process", RCTL_SUBJECT_TYPE_PROCESS }, 96ec125fbbSEdward Tomasz Napierala { "user", RCTL_SUBJECT_TYPE_USER }, 97ec125fbbSEdward Tomasz Napierala { "loginclass", RCTL_SUBJECT_TYPE_LOGINCLASS }, 98ec125fbbSEdward Tomasz Napierala { "jail", RCTL_SUBJECT_TYPE_JAIL }, 99ec125fbbSEdward Tomasz Napierala { NULL, -1 }}; 100ec125fbbSEdward Tomasz Napierala 101ec125fbbSEdward Tomasz Napierala static struct dict resourcenames[] = { 102ec125fbbSEdward Tomasz Napierala { "cpu", RACCT_CPU }, 103ec125fbbSEdward Tomasz Napierala { "data", RACCT_DATA }, 104ec125fbbSEdward Tomasz Napierala { "stack", RACCT_STACK }, 105ec125fbbSEdward Tomasz Napierala { "core", RACCT_CORE }, 106ec125fbbSEdward Tomasz Napierala { "rss", RACCT_RSS }, 107ec125fbbSEdward Tomasz Napierala { "memlock", RACCT_MEMLOCK }, 108ec125fbbSEdward Tomasz Napierala { "nproc", RACCT_NPROC }, 109ec125fbbSEdward Tomasz Napierala { "nofile", RACCT_NOFILE }, 110ec125fbbSEdward Tomasz Napierala { "vmem", RACCT_VMEM }, 111ec125fbbSEdward Tomasz Napierala { "npts", RACCT_NPTS }, 112ec125fbbSEdward Tomasz Napierala { "swap", RACCT_SWAP }, 113ec125fbbSEdward Tomasz Napierala { "nthr", RACCT_NTHR }, 114ec125fbbSEdward Tomasz Napierala { "msgqqueued", RACCT_MSGQQUEUED }, 115ec125fbbSEdward Tomasz Napierala { "msgqsize", RACCT_MSGQSIZE }, 116ec125fbbSEdward Tomasz Napierala { "nmsgq", RACCT_NMSGQ }, 117ec125fbbSEdward Tomasz Napierala { "nsem", RACCT_NSEM }, 118ec125fbbSEdward Tomasz Napierala { "nsemop", RACCT_NSEMOP }, 119ec125fbbSEdward Tomasz Napierala { "nshm", RACCT_NSHM }, 120ec125fbbSEdward Tomasz Napierala { "shmsize", RACCT_SHMSIZE }, 121ec125fbbSEdward Tomasz Napierala { "wallclock", RACCT_WALLCLOCK }, 122ec125fbbSEdward Tomasz Napierala { NULL, -1 }}; 123ec125fbbSEdward Tomasz Napierala 124ec125fbbSEdward Tomasz Napierala static struct dict actionnames[] = { 125ec125fbbSEdward Tomasz Napierala { "sighup", RCTL_ACTION_SIGHUP }, 126ec125fbbSEdward Tomasz Napierala { "sigint", RCTL_ACTION_SIGINT }, 127ec125fbbSEdward Tomasz Napierala { "sigquit", RCTL_ACTION_SIGQUIT }, 128ec125fbbSEdward Tomasz Napierala { "sigill", RCTL_ACTION_SIGILL }, 129ec125fbbSEdward Tomasz Napierala { "sigtrap", RCTL_ACTION_SIGTRAP }, 130ec125fbbSEdward Tomasz Napierala { "sigabrt", RCTL_ACTION_SIGABRT }, 131ec125fbbSEdward Tomasz Napierala { "sigemt", RCTL_ACTION_SIGEMT }, 132ec125fbbSEdward Tomasz Napierala { "sigfpe", RCTL_ACTION_SIGFPE }, 133ec125fbbSEdward Tomasz Napierala { "sigkill", RCTL_ACTION_SIGKILL }, 134ec125fbbSEdward Tomasz Napierala { "sigbus", RCTL_ACTION_SIGBUS }, 135ec125fbbSEdward Tomasz Napierala { "sigsegv", RCTL_ACTION_SIGSEGV }, 136ec125fbbSEdward Tomasz Napierala { "sigsys", RCTL_ACTION_SIGSYS }, 137ec125fbbSEdward Tomasz Napierala { "sigpipe", RCTL_ACTION_SIGPIPE }, 138ec125fbbSEdward Tomasz Napierala { "sigalrm", RCTL_ACTION_SIGALRM }, 139ec125fbbSEdward Tomasz Napierala { "sigterm", RCTL_ACTION_SIGTERM }, 140ec125fbbSEdward Tomasz Napierala { "sigurg", RCTL_ACTION_SIGURG }, 141ec125fbbSEdward Tomasz Napierala { "sigstop", RCTL_ACTION_SIGSTOP }, 142ec125fbbSEdward Tomasz Napierala { "sigtstp", RCTL_ACTION_SIGTSTP }, 143ec125fbbSEdward Tomasz Napierala { "sigchld", RCTL_ACTION_SIGCHLD }, 144ec125fbbSEdward Tomasz Napierala { "sigttin", RCTL_ACTION_SIGTTIN }, 145ec125fbbSEdward Tomasz Napierala { "sigttou", RCTL_ACTION_SIGTTOU }, 146ec125fbbSEdward Tomasz Napierala { "sigio", RCTL_ACTION_SIGIO }, 147ec125fbbSEdward Tomasz Napierala { "sigxcpu", RCTL_ACTION_SIGXCPU }, 148ec125fbbSEdward Tomasz Napierala { "sigxfsz", RCTL_ACTION_SIGXFSZ }, 149ec125fbbSEdward Tomasz Napierala { "sigvtalrm", RCTL_ACTION_SIGVTALRM }, 150ec125fbbSEdward Tomasz Napierala { "sigprof", RCTL_ACTION_SIGPROF }, 151ec125fbbSEdward Tomasz Napierala { "sigwinch", RCTL_ACTION_SIGWINCH }, 152ec125fbbSEdward Tomasz Napierala { "siginfo", RCTL_ACTION_SIGINFO }, 153ec125fbbSEdward Tomasz Napierala { "sigusr1", RCTL_ACTION_SIGUSR1 }, 154ec125fbbSEdward Tomasz Napierala { "sigusr2", RCTL_ACTION_SIGUSR2 }, 155ec125fbbSEdward Tomasz Napierala { "sigthr", RCTL_ACTION_SIGTHR }, 156ec125fbbSEdward Tomasz Napierala { "deny", RCTL_ACTION_DENY }, 157ec125fbbSEdward Tomasz Napierala { "log", RCTL_ACTION_LOG }, 158ec125fbbSEdward Tomasz Napierala { "devctl", RCTL_ACTION_DEVCTL }, 159ec125fbbSEdward Tomasz Napierala { NULL, -1 }}; 160ec125fbbSEdward Tomasz Napierala 161ec125fbbSEdward Tomasz Napierala static void rctl_init(void); 162ec125fbbSEdward Tomasz Napierala SYSINIT(rctl, SI_SUB_RACCT, SI_ORDER_FIRST, rctl_init, NULL); 163ec125fbbSEdward Tomasz Napierala 164ec125fbbSEdward Tomasz Napierala static uma_zone_t rctl_rule_link_zone; 165ec125fbbSEdward Tomasz Napierala static uma_zone_t rctl_rule_zone; 166ec125fbbSEdward Tomasz Napierala static struct rwlock rctl_lock; 167ec125fbbSEdward Tomasz Napierala RW_SYSINIT(rctl_lock, &rctl_lock, "RCTL lock"); 168ec125fbbSEdward Tomasz Napierala 169ec125fbbSEdward Tomasz Napierala static int rctl_rule_fully_specified(const struct rctl_rule *rule); 170ec125fbbSEdward Tomasz Napierala static void rctl_rule_to_sbuf(struct sbuf *sb, const struct rctl_rule *rule); 171ec125fbbSEdward Tomasz Napierala 172ec125fbbSEdward Tomasz Napierala MALLOC_DEFINE(M_RCTL, "rctl", "Resource Limits"); 173ec125fbbSEdward Tomasz Napierala 174ec125fbbSEdward Tomasz Napierala static const char * 175ec125fbbSEdward Tomasz Napierala rctl_subject_type_name(int subject) 176ec125fbbSEdward Tomasz Napierala { 177ec125fbbSEdward Tomasz Napierala int i; 178ec125fbbSEdward Tomasz Napierala 179ec125fbbSEdward Tomasz Napierala for (i = 0; subjectnames[i].d_name != NULL; i++) { 180ec125fbbSEdward Tomasz Napierala if (subjectnames[i].d_value == subject) 181ec125fbbSEdward Tomasz Napierala return (subjectnames[i].d_name); 182ec125fbbSEdward Tomasz Napierala } 183ec125fbbSEdward Tomasz Napierala 184ec125fbbSEdward Tomasz Napierala panic("rctl_subject_type_name: unknown subject type %d", subject); 185ec125fbbSEdward Tomasz Napierala } 186ec125fbbSEdward Tomasz Napierala 187ec125fbbSEdward Tomasz Napierala static const char * 188ec125fbbSEdward Tomasz Napierala rctl_action_name(int action) 189ec125fbbSEdward Tomasz Napierala { 190ec125fbbSEdward Tomasz Napierala int i; 191ec125fbbSEdward Tomasz Napierala 192ec125fbbSEdward Tomasz Napierala for (i = 0; actionnames[i].d_name != NULL; i++) { 193ec125fbbSEdward Tomasz Napierala if (actionnames[i].d_value == action) 194ec125fbbSEdward Tomasz Napierala return (actionnames[i].d_name); 195ec125fbbSEdward Tomasz Napierala } 196ec125fbbSEdward Tomasz Napierala 197ec125fbbSEdward Tomasz Napierala panic("rctl_action_name: unknown action %d", action); 198ec125fbbSEdward Tomasz Napierala } 199ec125fbbSEdward Tomasz Napierala 200ec125fbbSEdward Tomasz Napierala const char * 201ec125fbbSEdward Tomasz Napierala rctl_resource_name(int resource) 202ec125fbbSEdward Tomasz Napierala { 203ec125fbbSEdward Tomasz Napierala int i; 204ec125fbbSEdward Tomasz Napierala 205ec125fbbSEdward Tomasz Napierala for (i = 0; resourcenames[i].d_name != NULL; i++) { 206ec125fbbSEdward Tomasz Napierala if (resourcenames[i].d_value == resource) 207ec125fbbSEdward Tomasz Napierala return (resourcenames[i].d_name); 208ec125fbbSEdward Tomasz Napierala } 209ec125fbbSEdward Tomasz Napierala 210ec125fbbSEdward Tomasz Napierala panic("rctl_resource_name: unknown resource %d", resource); 211ec125fbbSEdward Tomasz Napierala } 212ec125fbbSEdward Tomasz Napierala 213ec125fbbSEdward Tomasz Napierala /* 214ec125fbbSEdward Tomasz Napierala * Return the amount of resource that can be allocated by 'p' before 215ec125fbbSEdward Tomasz Napierala * hitting 'rule'. 216ec125fbbSEdward Tomasz Napierala */ 217ec125fbbSEdward Tomasz Napierala static int64_t 218ec125fbbSEdward Tomasz Napierala rctl_available_resource(const struct proc *p, const struct rctl_rule *rule) 219ec125fbbSEdward Tomasz Napierala { 220ec125fbbSEdward Tomasz Napierala int resource; 221ec125fbbSEdward Tomasz Napierala int64_t available = INT64_MAX; 222ec125fbbSEdward Tomasz Napierala struct ucred *cred = p->p_ucred; 223ec125fbbSEdward Tomasz Napierala 224ec125fbbSEdward Tomasz Napierala rw_assert(&rctl_lock, RA_LOCKED); 225ec125fbbSEdward Tomasz Napierala 226ec125fbbSEdward Tomasz Napierala resource = rule->rr_resource; 227ec125fbbSEdward Tomasz Napierala switch (rule->rr_per) { 228ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_PROCESS: 229ec125fbbSEdward Tomasz Napierala available = rule->rr_amount - 230ec125fbbSEdward Tomasz Napierala p->p_racct->r_resources[resource]; 231ec125fbbSEdward Tomasz Napierala break; 232ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 233ec125fbbSEdward Tomasz Napierala available = rule->rr_amount - 234ec125fbbSEdward Tomasz Napierala cred->cr_ruidinfo->ui_racct->r_resources[resource]; 235ec125fbbSEdward Tomasz Napierala break; 236ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 237ec125fbbSEdward Tomasz Napierala available = rule->rr_amount - 238ec125fbbSEdward Tomasz Napierala cred->cr_loginclass->lc_racct->r_resources[resource]; 239ec125fbbSEdward Tomasz Napierala break; 240ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 241ec125fbbSEdward Tomasz Napierala available = rule->rr_amount - 242a7ad07bfSEdward Tomasz Napierala cred->cr_prison->pr_prison_racct->prr_racct-> 243a7ad07bfSEdward Tomasz Napierala r_resources[resource]; 244ec125fbbSEdward Tomasz Napierala break; 245ec125fbbSEdward Tomasz Napierala default: 246ec125fbbSEdward Tomasz Napierala panic("rctl_compute_available: unknown per %d", 247ec125fbbSEdward Tomasz Napierala rule->rr_per); 248ec125fbbSEdward Tomasz Napierala } 249ec125fbbSEdward Tomasz Napierala 250ec125fbbSEdward Tomasz Napierala return (available); 251ec125fbbSEdward Tomasz Napierala } 252ec125fbbSEdward Tomasz Napierala 253ec125fbbSEdward Tomasz Napierala /* 254ec125fbbSEdward Tomasz Napierala * Return non-zero if allocating 'amount' by proc 'p' would exceed 255ec125fbbSEdward Tomasz Napierala * resource limit specified by 'rule'. 256ec125fbbSEdward Tomasz Napierala */ 257ec125fbbSEdward Tomasz Napierala static int 258ec125fbbSEdward Tomasz Napierala rctl_would_exceed(const struct proc *p, const struct rctl_rule *rule, 259ec125fbbSEdward Tomasz Napierala int64_t amount) 260ec125fbbSEdward Tomasz Napierala { 261ec125fbbSEdward Tomasz Napierala int64_t available; 262ec125fbbSEdward Tomasz Napierala 263ec125fbbSEdward Tomasz Napierala rw_assert(&rctl_lock, RA_LOCKED); 264ec125fbbSEdward Tomasz Napierala 265ec125fbbSEdward Tomasz Napierala available = rctl_available_resource(p, rule); 266ec125fbbSEdward Tomasz Napierala if (available >= amount) 267ec125fbbSEdward Tomasz Napierala return (0); 268ec125fbbSEdward Tomasz Napierala 269ec125fbbSEdward Tomasz Napierala return (1); 270ec125fbbSEdward Tomasz Napierala } 271ec125fbbSEdward Tomasz Napierala 272ec125fbbSEdward Tomasz Napierala /* 273ec125fbbSEdward Tomasz Napierala * Check whether the proc 'p' can allocate 'amount' of 'resource' in addition 274ec125fbbSEdward Tomasz Napierala * to what it keeps allocated now. Returns non-zero if the allocation should 275ec125fbbSEdward Tomasz Napierala * be denied, 0 otherwise. 276ec125fbbSEdward Tomasz Napierala */ 277ec125fbbSEdward Tomasz Napierala int 278ec125fbbSEdward Tomasz Napierala rctl_enforce(struct proc *p, int resource, uint64_t amount) 279ec125fbbSEdward Tomasz Napierala { 280ec125fbbSEdward Tomasz Napierala struct rctl_rule *rule; 281ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 282ec125fbbSEdward Tomasz Napierala struct sbuf sb; 283ec125fbbSEdward Tomasz Napierala int should_deny = 0; 284ec125fbbSEdward Tomasz Napierala char *buf; 285ec125fbbSEdward Tomasz Napierala static int curtime = 0; 286ec125fbbSEdward Tomasz Napierala static struct timeval lasttime; 287ec125fbbSEdward Tomasz Napierala 288ec125fbbSEdward Tomasz Napierala rw_rlock(&rctl_lock); 289ec125fbbSEdward Tomasz Napierala 290ec125fbbSEdward Tomasz Napierala /* 291ec125fbbSEdward Tomasz Napierala * There may be more than one matching rule; go through all of them. 292ec125fbbSEdward Tomasz Napierala * Denial should be done last, after logging and sending signals. 293ec125fbbSEdward Tomasz Napierala */ 294ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &p->p_racct->r_rule_links, rrl_next) { 295ec125fbbSEdward Tomasz Napierala rule = link->rrl_rule; 296ec125fbbSEdward Tomasz Napierala if (rule->rr_resource != resource) 297ec125fbbSEdward Tomasz Napierala continue; 298ec125fbbSEdward Tomasz Napierala if (!rctl_would_exceed(p, rule, amount)) { 299ec125fbbSEdward Tomasz Napierala link->rrl_exceeded = 0; 300ec125fbbSEdward Tomasz Napierala continue; 301ec125fbbSEdward Tomasz Napierala } 302ec125fbbSEdward Tomasz Napierala 303ec125fbbSEdward Tomasz Napierala switch (rule->rr_action) { 304ec125fbbSEdward Tomasz Napierala case RCTL_ACTION_DENY: 305ec125fbbSEdward Tomasz Napierala should_deny = 1; 306ec125fbbSEdward Tomasz Napierala continue; 307ec125fbbSEdward Tomasz Napierala case RCTL_ACTION_LOG: 308ec125fbbSEdward Tomasz Napierala /* 309ec125fbbSEdward Tomasz Napierala * If rrl_exceeded != 0, it means we've already 310ec125fbbSEdward Tomasz Napierala * logged a warning for this process. 311ec125fbbSEdward Tomasz Napierala */ 312ec125fbbSEdward Tomasz Napierala if (link->rrl_exceeded != 0) 313ec125fbbSEdward Tomasz Napierala continue; 314ec125fbbSEdward Tomasz Napierala 315ec125fbbSEdward Tomasz Napierala if (!ppsratecheck(&lasttime, &curtime, 10)) 316ec125fbbSEdward Tomasz Napierala continue; 317ec125fbbSEdward Tomasz Napierala 318ec125fbbSEdward Tomasz Napierala buf = malloc(RCTL_LOG_BUFSIZE, M_RCTL, M_NOWAIT); 319ec125fbbSEdward Tomasz Napierala if (buf == NULL) { 320ec125fbbSEdward Tomasz Napierala printf("rctl_enforce: out of memory\n"); 321ec125fbbSEdward Tomasz Napierala continue; 322ec125fbbSEdward Tomasz Napierala } 323ec125fbbSEdward Tomasz Napierala sbuf_new(&sb, buf, RCTL_LOG_BUFSIZE, SBUF_FIXEDLEN); 324ec125fbbSEdward Tomasz Napierala rctl_rule_to_sbuf(&sb, rule); 325ec125fbbSEdward Tomasz Napierala sbuf_finish(&sb); 326ec125fbbSEdward Tomasz Napierala printf("rctl: rule \"%s\" matched by pid %d " 327ec125fbbSEdward Tomasz Napierala "(%s), uid %d, jail %s\n", sbuf_data(&sb), 328ec125fbbSEdward Tomasz Napierala p->p_pid, p->p_comm, p->p_ucred->cr_uid, 329a7ad07bfSEdward Tomasz Napierala p->p_ucred->cr_prison->pr_prison_racct->prr_name); 330ec125fbbSEdward Tomasz Napierala sbuf_delete(&sb); 331ec125fbbSEdward Tomasz Napierala free(buf, M_RCTL); 332ec125fbbSEdward Tomasz Napierala link->rrl_exceeded = 1; 333ec125fbbSEdward Tomasz Napierala continue; 334ec125fbbSEdward Tomasz Napierala case RCTL_ACTION_DEVCTL: 335ec125fbbSEdward Tomasz Napierala if (link->rrl_exceeded != 0) 336ec125fbbSEdward Tomasz Napierala continue; 337ec125fbbSEdward Tomasz Napierala 338ec125fbbSEdward Tomasz Napierala buf = malloc(RCTL_LOG_BUFSIZE, M_RCTL, M_NOWAIT); 339ec125fbbSEdward Tomasz Napierala if (buf == NULL) { 340ec125fbbSEdward Tomasz Napierala printf("rctl_enforce: out of memory\n"); 341ec125fbbSEdward Tomasz Napierala continue; 342ec125fbbSEdward Tomasz Napierala } 343ec125fbbSEdward Tomasz Napierala sbuf_new(&sb, buf, RCTL_LOG_BUFSIZE, SBUF_FIXEDLEN); 344ec125fbbSEdward Tomasz Napierala sbuf_printf(&sb, "rule="); 345ec125fbbSEdward Tomasz Napierala rctl_rule_to_sbuf(&sb, rule); 346ec125fbbSEdward Tomasz Napierala sbuf_printf(&sb, " pid=%d ruid=%d jail=%s", 347ec125fbbSEdward Tomasz Napierala p->p_pid, p->p_ucred->cr_ruid, 348a7ad07bfSEdward Tomasz Napierala p->p_ucred->cr_prison->pr_prison_racct->prr_name); 349ec125fbbSEdward Tomasz Napierala sbuf_finish(&sb); 350ec125fbbSEdward Tomasz Napierala devctl_notify_f("RCTL", "rule", "matched", 351ec125fbbSEdward Tomasz Napierala sbuf_data(&sb), M_NOWAIT); 352ec125fbbSEdward Tomasz Napierala sbuf_delete(&sb); 353ec125fbbSEdward Tomasz Napierala free(buf, M_RCTL); 354ec125fbbSEdward Tomasz Napierala link->rrl_exceeded = 1; 355ec125fbbSEdward Tomasz Napierala continue; 356ec125fbbSEdward Tomasz Napierala default: 357ec125fbbSEdward Tomasz Napierala if (link->rrl_exceeded != 0) 358ec125fbbSEdward Tomasz Napierala continue; 359ec125fbbSEdward Tomasz Napierala 360ec125fbbSEdward Tomasz Napierala KASSERT(rule->rr_action > 0 && 361ec125fbbSEdward Tomasz Napierala rule->rr_action <= RCTL_ACTION_SIGNAL_MAX, 362ec125fbbSEdward Tomasz Napierala ("rctl_enforce: unknown action %d", 363ec125fbbSEdward Tomasz Napierala rule->rr_action)); 364ec125fbbSEdward Tomasz Napierala 365ec125fbbSEdward Tomasz Napierala /* 366ec125fbbSEdward Tomasz Napierala * We're using the fact that RCTL_ACTION_SIG* values 367ec125fbbSEdward Tomasz Napierala * are equal to their counterparts from sys/signal.h. 368ec125fbbSEdward Tomasz Napierala */ 369ec125fbbSEdward Tomasz Napierala psignal(p, rule->rr_action); 370ec125fbbSEdward Tomasz Napierala link->rrl_exceeded = 1; 371ec125fbbSEdward Tomasz Napierala continue; 372ec125fbbSEdward Tomasz Napierala } 373ec125fbbSEdward Tomasz Napierala } 374ec125fbbSEdward Tomasz Napierala 375ec125fbbSEdward Tomasz Napierala rw_runlock(&rctl_lock); 376ec125fbbSEdward Tomasz Napierala 377ec125fbbSEdward Tomasz Napierala if (should_deny) { 378ec125fbbSEdward Tomasz Napierala /* 379ec125fbbSEdward Tomasz Napierala * Return fake error code; the caller should change it 380ec125fbbSEdward Tomasz Napierala * into one proper for the situation - EFSIZ, ENOMEM etc. 381ec125fbbSEdward Tomasz Napierala */ 382ec125fbbSEdward Tomasz Napierala return (EDOOFUS); 383ec125fbbSEdward Tomasz Napierala } 384ec125fbbSEdward Tomasz Napierala 385ec125fbbSEdward Tomasz Napierala return (0); 386ec125fbbSEdward Tomasz Napierala } 387ec125fbbSEdward Tomasz Napierala 388ec125fbbSEdward Tomasz Napierala uint64_t 389ec125fbbSEdward Tomasz Napierala rctl_get_limit(struct proc *p, int resource) 390ec125fbbSEdward Tomasz Napierala { 391ec125fbbSEdward Tomasz Napierala struct rctl_rule *rule; 392ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 393ec125fbbSEdward Tomasz Napierala uint64_t amount = UINT64_MAX; 394ec125fbbSEdward Tomasz Napierala 395ec125fbbSEdward Tomasz Napierala rw_rlock(&rctl_lock); 396ec125fbbSEdward Tomasz Napierala 397ec125fbbSEdward Tomasz Napierala /* 398ec125fbbSEdward Tomasz Napierala * There may be more than one matching rule; go through all of them. 399ec125fbbSEdward Tomasz Napierala * Denial should be done last, after logging and sending signals. 400ec125fbbSEdward Tomasz Napierala */ 401ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &p->p_racct->r_rule_links, rrl_next) { 402ec125fbbSEdward Tomasz Napierala rule = link->rrl_rule; 403ec125fbbSEdward Tomasz Napierala if (rule->rr_resource != resource) 404ec125fbbSEdward Tomasz Napierala continue; 405ec125fbbSEdward Tomasz Napierala if (rule->rr_action != RCTL_ACTION_DENY) 406ec125fbbSEdward Tomasz Napierala continue; 407ec125fbbSEdward Tomasz Napierala if (rule->rr_amount < amount) 408ec125fbbSEdward Tomasz Napierala amount = rule->rr_amount; 409ec125fbbSEdward Tomasz Napierala } 410ec125fbbSEdward Tomasz Napierala 411ec125fbbSEdward Tomasz Napierala rw_runlock(&rctl_lock); 412ec125fbbSEdward Tomasz Napierala 413ec125fbbSEdward Tomasz Napierala return (amount); 414ec125fbbSEdward Tomasz Napierala } 415ec125fbbSEdward Tomasz Napierala 416ec125fbbSEdward Tomasz Napierala uint64_t 417ec125fbbSEdward Tomasz Napierala rctl_get_available(struct proc *p, int resource) 418ec125fbbSEdward Tomasz Napierala { 419ec125fbbSEdward Tomasz Napierala struct rctl_rule *rule; 420ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 421ec125fbbSEdward Tomasz Napierala int64_t available, minavailable, allocated; 422ec125fbbSEdward Tomasz Napierala 423ec125fbbSEdward Tomasz Napierala minavailable = INT64_MAX; 424ec125fbbSEdward Tomasz Napierala 425ec125fbbSEdward Tomasz Napierala rw_rlock(&rctl_lock); 426ec125fbbSEdward Tomasz Napierala 427ec125fbbSEdward Tomasz Napierala /* 428ec125fbbSEdward Tomasz Napierala * There may be more than one matching rule; go through all of them. 429ec125fbbSEdward Tomasz Napierala * Denial should be done last, after logging and sending signals. 430ec125fbbSEdward Tomasz Napierala */ 431ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &p->p_racct->r_rule_links, rrl_next) { 432ec125fbbSEdward Tomasz Napierala rule = link->rrl_rule; 433ec125fbbSEdward Tomasz Napierala if (rule->rr_resource != resource) 434ec125fbbSEdward Tomasz Napierala continue; 435ec125fbbSEdward Tomasz Napierala if (rule->rr_action != RCTL_ACTION_DENY) 436ec125fbbSEdward Tomasz Napierala continue; 437ec125fbbSEdward Tomasz Napierala available = rctl_available_resource(p, rule); 438ec125fbbSEdward Tomasz Napierala if (available < minavailable) 439ec125fbbSEdward Tomasz Napierala minavailable = available; 440ec125fbbSEdward Tomasz Napierala } 441ec125fbbSEdward Tomasz Napierala 442ec125fbbSEdward Tomasz Napierala rw_runlock(&rctl_lock); 443ec125fbbSEdward Tomasz Napierala 444ec125fbbSEdward Tomasz Napierala /* 445ec125fbbSEdward Tomasz Napierala * XXX: Think about this _hard_. 446ec125fbbSEdward Tomasz Napierala */ 447ec125fbbSEdward Tomasz Napierala allocated = p->p_racct->r_resources[resource]; 448ec125fbbSEdward Tomasz Napierala if (minavailable < INT64_MAX - allocated) 449ec125fbbSEdward Tomasz Napierala minavailable += allocated; 450ec125fbbSEdward Tomasz Napierala if (minavailable < 0) 451ec125fbbSEdward Tomasz Napierala minavailable = 0; 452ec125fbbSEdward Tomasz Napierala return (minavailable); 453ec125fbbSEdward Tomasz Napierala } 454ec125fbbSEdward Tomasz Napierala 455ec125fbbSEdward Tomasz Napierala static int 456ec125fbbSEdward Tomasz Napierala rctl_rule_matches(const struct rctl_rule *rule, const struct rctl_rule *filter) 457ec125fbbSEdward Tomasz Napierala { 458ec125fbbSEdward Tomasz Napierala 459ec125fbbSEdward Tomasz Napierala if (filter->rr_subject_type != RCTL_SUBJECT_TYPE_UNDEFINED) { 460ec125fbbSEdward Tomasz Napierala if (rule->rr_subject_type != filter->rr_subject_type) 461ec125fbbSEdward Tomasz Napierala return (0); 462ec125fbbSEdward Tomasz Napierala 463ec125fbbSEdward Tomasz Napierala switch (filter->rr_subject_type) { 464ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_PROCESS: 465ec125fbbSEdward Tomasz Napierala if (filter->rr_subject.rs_proc != NULL && 466ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_proc != 467ec125fbbSEdward Tomasz Napierala filter->rr_subject.rs_proc) 468ec125fbbSEdward Tomasz Napierala return (0); 469ec125fbbSEdward Tomasz Napierala break; 470ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 471ec125fbbSEdward Tomasz Napierala if (filter->rr_subject.rs_uip != NULL && 472ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_uip != 473ec125fbbSEdward Tomasz Napierala filter->rr_subject.rs_uip) 474ec125fbbSEdward Tomasz Napierala return (0); 475ec125fbbSEdward Tomasz Napierala break; 476ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 477415896e3SEdward Tomasz Napierala if (filter->rr_subject.rs_loginclass != NULL && 478415896e3SEdward Tomasz Napierala rule->rr_subject.rs_loginclass != 479415896e3SEdward Tomasz Napierala filter->rr_subject.rs_loginclass) 480ec125fbbSEdward Tomasz Napierala return (0); 481ec125fbbSEdward Tomasz Napierala break; 482ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 483a7ad07bfSEdward Tomasz Napierala if (filter->rr_subject.rs_prison_racct != NULL && 484a7ad07bfSEdward Tomasz Napierala rule->rr_subject.rs_prison_racct != 485a7ad07bfSEdward Tomasz Napierala filter->rr_subject.rs_prison_racct) 486ec125fbbSEdward Tomasz Napierala return (0); 487ec125fbbSEdward Tomasz Napierala break; 488ec125fbbSEdward Tomasz Napierala default: 489ec125fbbSEdward Tomasz Napierala panic("rctl_rule_matches: unknown subject type %d", 490ec125fbbSEdward Tomasz Napierala filter->rr_subject_type); 491ec125fbbSEdward Tomasz Napierala } 492ec125fbbSEdward Tomasz Napierala } 493ec125fbbSEdward Tomasz Napierala 494ec125fbbSEdward Tomasz Napierala if (filter->rr_resource != RACCT_UNDEFINED) { 495ec125fbbSEdward Tomasz Napierala if (rule->rr_resource != filter->rr_resource) 496ec125fbbSEdward Tomasz Napierala return (0); 497ec125fbbSEdward Tomasz Napierala } 498ec125fbbSEdward Tomasz Napierala 499ec125fbbSEdward Tomasz Napierala if (filter->rr_action != RCTL_ACTION_UNDEFINED) { 500ec125fbbSEdward Tomasz Napierala if (rule->rr_action != filter->rr_action) 501ec125fbbSEdward Tomasz Napierala return (0); 502ec125fbbSEdward Tomasz Napierala } 503ec125fbbSEdward Tomasz Napierala 504ec125fbbSEdward Tomasz Napierala if (filter->rr_amount != RCTL_AMOUNT_UNDEFINED) { 505ec125fbbSEdward Tomasz Napierala if (rule->rr_amount != filter->rr_amount) 506ec125fbbSEdward Tomasz Napierala return (0); 507ec125fbbSEdward Tomasz Napierala } 508ec125fbbSEdward Tomasz Napierala 509ec125fbbSEdward Tomasz Napierala if (filter->rr_per != RCTL_SUBJECT_TYPE_UNDEFINED) { 510ec125fbbSEdward Tomasz Napierala if (rule->rr_per != filter->rr_per) 511ec125fbbSEdward Tomasz Napierala return (0); 512ec125fbbSEdward Tomasz Napierala } 513ec125fbbSEdward Tomasz Napierala 514ec125fbbSEdward Tomasz Napierala return (1); 515ec125fbbSEdward Tomasz Napierala } 516ec125fbbSEdward Tomasz Napierala 517ec125fbbSEdward Tomasz Napierala static int 518ec125fbbSEdward Tomasz Napierala str2value(const char *str, int *value, struct dict *table) 519ec125fbbSEdward Tomasz Napierala { 520ec125fbbSEdward Tomasz Napierala int i; 521ec125fbbSEdward Tomasz Napierala 522ec125fbbSEdward Tomasz Napierala if (value == NULL) 523ec125fbbSEdward Tomasz Napierala return (EINVAL); 524ec125fbbSEdward Tomasz Napierala 525ec125fbbSEdward Tomasz Napierala for (i = 0; table[i].d_name != NULL; i++) { 526ec125fbbSEdward Tomasz Napierala if (strcasecmp(table[i].d_name, str) == 0) { 527ec125fbbSEdward Tomasz Napierala *value = table[i].d_value; 528ec125fbbSEdward Tomasz Napierala return (0); 529ec125fbbSEdward Tomasz Napierala } 530ec125fbbSEdward Tomasz Napierala } 531ec125fbbSEdward Tomasz Napierala 532ec125fbbSEdward Tomasz Napierala return (EINVAL); 533ec125fbbSEdward Tomasz Napierala } 534ec125fbbSEdward Tomasz Napierala 535ec125fbbSEdward Tomasz Napierala static int 536ec125fbbSEdward Tomasz Napierala str2id(const char *str, id_t *value) 537ec125fbbSEdward Tomasz Napierala { 538ec125fbbSEdward Tomasz Napierala char *end; 539ec125fbbSEdward Tomasz Napierala 540ec125fbbSEdward Tomasz Napierala if (str == NULL) 541ec125fbbSEdward Tomasz Napierala return (EINVAL); 542ec125fbbSEdward Tomasz Napierala 543ec125fbbSEdward Tomasz Napierala *value = strtoul(str, &end, 10); 544ec125fbbSEdward Tomasz Napierala if ((size_t)(end - str) != strlen(str)) 545ec125fbbSEdward Tomasz Napierala return (EINVAL); 546ec125fbbSEdward Tomasz Napierala 547ec125fbbSEdward Tomasz Napierala return (0); 548ec125fbbSEdward Tomasz Napierala } 549ec125fbbSEdward Tomasz Napierala 550ec125fbbSEdward Tomasz Napierala static int 551ec125fbbSEdward Tomasz Napierala str2int64(const char *str, int64_t *value) 552ec125fbbSEdward Tomasz Napierala { 553ec125fbbSEdward Tomasz Napierala char *end; 554ec125fbbSEdward Tomasz Napierala 555ec125fbbSEdward Tomasz Napierala if (str == NULL) 556ec125fbbSEdward Tomasz Napierala return (EINVAL); 557ec125fbbSEdward Tomasz Napierala 558ec125fbbSEdward Tomasz Napierala *value = strtoul(str, &end, 10); 559ec125fbbSEdward Tomasz Napierala if ((size_t)(end - str) != strlen(str)) 560ec125fbbSEdward Tomasz Napierala return (EINVAL); 561ec125fbbSEdward Tomasz Napierala 562ec125fbbSEdward Tomasz Napierala return (0); 563ec125fbbSEdward Tomasz Napierala } 564ec125fbbSEdward Tomasz Napierala 565ec125fbbSEdward Tomasz Napierala /* 566ec125fbbSEdward Tomasz Napierala * Connect the rule to the racct, increasing refcount for the rule. 567ec125fbbSEdward Tomasz Napierala */ 568ec125fbbSEdward Tomasz Napierala static void 569ec125fbbSEdward Tomasz Napierala rctl_racct_add_rule(struct racct *racct, struct rctl_rule *rule) 570ec125fbbSEdward Tomasz Napierala { 571ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 572ec125fbbSEdward Tomasz Napierala 573ec125fbbSEdward Tomasz Napierala KASSERT(rctl_rule_fully_specified(rule), ("rule not fully specified")); 574ec125fbbSEdward Tomasz Napierala 575ec125fbbSEdward Tomasz Napierala rctl_rule_acquire(rule); 576ec125fbbSEdward Tomasz Napierala link = uma_zalloc(rctl_rule_link_zone, M_WAITOK); 577ec125fbbSEdward Tomasz Napierala link->rrl_rule = rule; 578ec125fbbSEdward Tomasz Napierala link->rrl_exceeded = 0; 579ec125fbbSEdward Tomasz Napierala 580ec125fbbSEdward Tomasz Napierala rw_wlock(&rctl_lock); 581ec125fbbSEdward Tomasz Napierala LIST_INSERT_HEAD(&racct->r_rule_links, link, rrl_next); 582ec125fbbSEdward Tomasz Napierala rw_wunlock(&rctl_lock); 583ec125fbbSEdward Tomasz Napierala } 584ec125fbbSEdward Tomasz Napierala 585ec125fbbSEdward Tomasz Napierala static int 586ec125fbbSEdward Tomasz Napierala rctl_racct_add_rule_locked(struct racct *racct, struct rctl_rule *rule) 587ec125fbbSEdward Tomasz Napierala { 588ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 589ec125fbbSEdward Tomasz Napierala 590ec125fbbSEdward Tomasz Napierala KASSERT(rctl_rule_fully_specified(rule), ("rule not fully specified")); 591ec125fbbSEdward Tomasz Napierala rw_assert(&rctl_lock, RA_WLOCKED); 592ec125fbbSEdward Tomasz Napierala 593ec125fbbSEdward Tomasz Napierala link = uma_zalloc(rctl_rule_link_zone, M_NOWAIT); 594ec125fbbSEdward Tomasz Napierala if (link == NULL) 595ec125fbbSEdward Tomasz Napierala return (ENOMEM); 596ec125fbbSEdward Tomasz Napierala rctl_rule_acquire(rule); 597ec125fbbSEdward Tomasz Napierala link->rrl_rule = rule; 598ec125fbbSEdward Tomasz Napierala link->rrl_exceeded = 0; 599ec125fbbSEdward Tomasz Napierala 600ec125fbbSEdward Tomasz Napierala LIST_INSERT_HEAD(&racct->r_rule_links, link, rrl_next); 601ec125fbbSEdward Tomasz Napierala return (0); 602ec125fbbSEdward Tomasz Napierala } 603ec125fbbSEdward Tomasz Napierala 604ec125fbbSEdward Tomasz Napierala /* 605ec125fbbSEdward Tomasz Napierala * Remove limits for a rules matching the filter and release 606ec125fbbSEdward Tomasz Napierala * the refcounts for the rules, possibly freeing them. Returns 607ec125fbbSEdward Tomasz Napierala * the number of limit structures removed. 608ec125fbbSEdward Tomasz Napierala */ 609ec125fbbSEdward Tomasz Napierala static int 610ec125fbbSEdward Tomasz Napierala rctl_racct_remove_rules(struct racct *racct, 611ec125fbbSEdward Tomasz Napierala const struct rctl_rule *filter) 612ec125fbbSEdward Tomasz Napierala { 613ec125fbbSEdward Tomasz Napierala int removed = 0; 614ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link, *linktmp; 615ec125fbbSEdward Tomasz Napierala 616ec125fbbSEdward Tomasz Napierala rw_assert(&rctl_lock, RA_WLOCKED); 617ec125fbbSEdward Tomasz Napierala 618ec125fbbSEdward Tomasz Napierala LIST_FOREACH_SAFE(link, &racct->r_rule_links, rrl_next, linktmp) { 619ec125fbbSEdward Tomasz Napierala if (!rctl_rule_matches(link->rrl_rule, filter)) 620ec125fbbSEdward Tomasz Napierala continue; 621ec125fbbSEdward Tomasz Napierala 622ec125fbbSEdward Tomasz Napierala LIST_REMOVE(link, rrl_next); 623ec125fbbSEdward Tomasz Napierala rctl_rule_release(link->rrl_rule); 624ec125fbbSEdward Tomasz Napierala uma_zfree(rctl_rule_link_zone, link); 625ec125fbbSEdward Tomasz Napierala removed++; 626ec125fbbSEdward Tomasz Napierala } 627ec125fbbSEdward Tomasz Napierala return (removed); 628ec125fbbSEdward Tomasz Napierala } 629ec125fbbSEdward Tomasz Napierala 630ec125fbbSEdward Tomasz Napierala static void 631ec125fbbSEdward Tomasz Napierala rctl_rule_acquire_subject(struct rctl_rule *rule) 632ec125fbbSEdward Tomasz Napierala { 633ec125fbbSEdward Tomasz Napierala 634ec125fbbSEdward Tomasz Napierala switch (rule->rr_subject_type) { 635ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_UNDEFINED: 636ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_PROCESS: 637a7ad07bfSEdward Tomasz Napierala break; 638ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 639a7ad07bfSEdward Tomasz Napierala if (rule->rr_subject.rs_prison_racct != NULL) 640a7ad07bfSEdward Tomasz Napierala prison_racct_hold(rule->rr_subject.rs_prison_racct); 641ec125fbbSEdward Tomasz Napierala break; 642ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 643ec125fbbSEdward Tomasz Napierala if (rule->rr_subject.rs_uip != NULL) 644ec125fbbSEdward Tomasz Napierala uihold(rule->rr_subject.rs_uip); 645ec125fbbSEdward Tomasz Napierala break; 646ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 647415896e3SEdward Tomasz Napierala if (rule->rr_subject.rs_loginclass != NULL) 648415896e3SEdward Tomasz Napierala loginclass_hold(rule->rr_subject.rs_loginclass); 649ec125fbbSEdward Tomasz Napierala break; 650ec125fbbSEdward Tomasz Napierala default: 651ec125fbbSEdward Tomasz Napierala panic("rctl_rule_acquire_subject: unknown subject type %d", 652ec125fbbSEdward Tomasz Napierala rule->rr_subject_type); 653ec125fbbSEdward Tomasz Napierala } 654ec125fbbSEdward Tomasz Napierala } 655ec125fbbSEdward Tomasz Napierala 656ec125fbbSEdward Tomasz Napierala static void 657ec125fbbSEdward Tomasz Napierala rctl_rule_release_subject(struct rctl_rule *rule) 658ec125fbbSEdward Tomasz Napierala { 659ec125fbbSEdward Tomasz Napierala 660ec125fbbSEdward Tomasz Napierala switch (rule->rr_subject_type) { 661ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_UNDEFINED: 662ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_PROCESS: 663a7ad07bfSEdward Tomasz Napierala break; 664ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 665a7ad07bfSEdward Tomasz Napierala if (rule->rr_subject.rs_prison_racct != NULL) 666a7ad07bfSEdward Tomasz Napierala prison_racct_free(rule->rr_subject.rs_prison_racct); 667ec125fbbSEdward Tomasz Napierala break; 668ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 669ec125fbbSEdward Tomasz Napierala if (rule->rr_subject.rs_uip != NULL) 670ec125fbbSEdward Tomasz Napierala uifree(rule->rr_subject.rs_uip); 671ec125fbbSEdward Tomasz Napierala break; 672ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 673415896e3SEdward Tomasz Napierala if (rule->rr_subject.rs_loginclass != NULL) 674415896e3SEdward Tomasz Napierala loginclass_free(rule->rr_subject.rs_loginclass); 675ec125fbbSEdward Tomasz Napierala break; 676ec125fbbSEdward Tomasz Napierala default: 677ec125fbbSEdward Tomasz Napierala panic("rctl_rule_release_subject: unknown subject type %d", 678ec125fbbSEdward Tomasz Napierala rule->rr_subject_type); 679ec125fbbSEdward Tomasz Napierala } 680ec125fbbSEdward Tomasz Napierala } 681ec125fbbSEdward Tomasz Napierala 682ec125fbbSEdward Tomasz Napierala struct rctl_rule * 683ec125fbbSEdward Tomasz Napierala rctl_rule_alloc(int flags) 684ec125fbbSEdward Tomasz Napierala { 685ec125fbbSEdward Tomasz Napierala struct rctl_rule *rule; 686ec125fbbSEdward Tomasz Napierala 687ec125fbbSEdward Tomasz Napierala rule = uma_zalloc(rctl_rule_zone, flags); 688ec125fbbSEdward Tomasz Napierala if (rule == NULL) 689ec125fbbSEdward Tomasz Napierala return (NULL); 690ec125fbbSEdward Tomasz Napierala rule->rr_subject_type = RCTL_SUBJECT_TYPE_UNDEFINED; 691ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_proc = NULL; 692ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_uip = NULL; 693415896e3SEdward Tomasz Napierala rule->rr_subject.rs_loginclass = NULL; 694a7ad07bfSEdward Tomasz Napierala rule->rr_subject.rs_prison_racct = NULL; 695ec125fbbSEdward Tomasz Napierala rule->rr_per = RCTL_SUBJECT_TYPE_UNDEFINED; 696ec125fbbSEdward Tomasz Napierala rule->rr_resource = RACCT_UNDEFINED; 697ec125fbbSEdward Tomasz Napierala rule->rr_action = RCTL_ACTION_UNDEFINED; 698ec125fbbSEdward Tomasz Napierala rule->rr_amount = RCTL_AMOUNT_UNDEFINED; 699ec125fbbSEdward Tomasz Napierala refcount_init(&rule->rr_refcount, 1); 700ec125fbbSEdward Tomasz Napierala 701ec125fbbSEdward Tomasz Napierala return (rule); 702ec125fbbSEdward Tomasz Napierala } 703ec125fbbSEdward Tomasz Napierala 704ec125fbbSEdward Tomasz Napierala struct rctl_rule * 705ec125fbbSEdward Tomasz Napierala rctl_rule_duplicate(const struct rctl_rule *rule, int flags) 706ec125fbbSEdward Tomasz Napierala { 707ec125fbbSEdward Tomasz Napierala struct rctl_rule *copy; 708ec125fbbSEdward Tomasz Napierala 709ec125fbbSEdward Tomasz Napierala copy = uma_zalloc(rctl_rule_zone, flags); 710ec125fbbSEdward Tomasz Napierala if (copy == NULL) 711ec125fbbSEdward Tomasz Napierala return (NULL); 712ec125fbbSEdward Tomasz Napierala copy->rr_subject_type = rule->rr_subject_type; 713ec125fbbSEdward Tomasz Napierala copy->rr_subject.rs_proc = rule->rr_subject.rs_proc; 714ec125fbbSEdward Tomasz Napierala copy->rr_subject.rs_uip = rule->rr_subject.rs_uip; 715415896e3SEdward Tomasz Napierala copy->rr_subject.rs_loginclass = rule->rr_subject.rs_loginclass; 716a7ad07bfSEdward Tomasz Napierala copy->rr_subject.rs_prison_racct = rule->rr_subject.rs_prison_racct; 717ec125fbbSEdward Tomasz Napierala copy->rr_per = rule->rr_per; 718ec125fbbSEdward Tomasz Napierala copy->rr_resource = rule->rr_resource; 719ec125fbbSEdward Tomasz Napierala copy->rr_action = rule->rr_action; 720ec125fbbSEdward Tomasz Napierala copy->rr_amount = rule->rr_amount; 721ec125fbbSEdward Tomasz Napierala refcount_init(©->rr_refcount, 1); 722ec125fbbSEdward Tomasz Napierala rctl_rule_acquire_subject(copy); 723ec125fbbSEdward Tomasz Napierala 724ec125fbbSEdward Tomasz Napierala return (copy); 725ec125fbbSEdward Tomasz Napierala } 726ec125fbbSEdward Tomasz Napierala 727ec125fbbSEdward Tomasz Napierala void 728ec125fbbSEdward Tomasz Napierala rctl_rule_acquire(struct rctl_rule *rule) 729ec125fbbSEdward Tomasz Napierala { 730ec125fbbSEdward Tomasz Napierala 731ec125fbbSEdward Tomasz Napierala KASSERT(rule->rr_refcount > 0, ("rule->rr_refcount <= 0")); 732ec125fbbSEdward Tomasz Napierala 733ec125fbbSEdward Tomasz Napierala refcount_acquire(&rule->rr_refcount); 734ec125fbbSEdward Tomasz Napierala } 735ec125fbbSEdward Tomasz Napierala 736ec125fbbSEdward Tomasz Napierala static void 737ec125fbbSEdward Tomasz Napierala rctl_rule_free(void *context, int pending) 738ec125fbbSEdward Tomasz Napierala { 739ec125fbbSEdward Tomasz Napierala struct rctl_rule *rule; 740ec125fbbSEdward Tomasz Napierala 741ec125fbbSEdward Tomasz Napierala rule = (struct rctl_rule *)context; 742ec125fbbSEdward Tomasz Napierala 743ec125fbbSEdward Tomasz Napierala KASSERT(rule->rr_refcount == 0, ("rule->rr_refcount != 0")); 744ec125fbbSEdward Tomasz Napierala 745ec125fbbSEdward Tomasz Napierala /* 746ec125fbbSEdward Tomasz Napierala * We don't need locking here; rule is guaranteed to be inaccessible. 747ec125fbbSEdward Tomasz Napierala */ 748ec125fbbSEdward Tomasz Napierala 749ec125fbbSEdward Tomasz Napierala rctl_rule_release_subject(rule); 750ec125fbbSEdward Tomasz Napierala uma_zfree(rctl_rule_zone, rule); 751ec125fbbSEdward Tomasz Napierala } 752ec125fbbSEdward Tomasz Napierala 753ec125fbbSEdward Tomasz Napierala void 754ec125fbbSEdward Tomasz Napierala rctl_rule_release(struct rctl_rule *rule) 755ec125fbbSEdward Tomasz Napierala { 756ec125fbbSEdward Tomasz Napierala 757ec125fbbSEdward Tomasz Napierala KASSERT(rule->rr_refcount > 0, ("rule->rr_refcount <= 0")); 758ec125fbbSEdward Tomasz Napierala 759ec125fbbSEdward Tomasz Napierala if (refcount_release(&rule->rr_refcount)) { 760ec125fbbSEdward Tomasz Napierala /* 761ec125fbbSEdward Tomasz Napierala * rctl_rule_release() is often called when iterating 762ec125fbbSEdward Tomasz Napierala * over all the uidinfo structures in the system, 763ec125fbbSEdward Tomasz Napierala * holding uihashtbl_lock. Since rctl_rule_free() 764ec125fbbSEdward Tomasz Napierala * might end up calling uifree(), this would lead 765ec125fbbSEdward Tomasz Napierala * to lock recursion. Use taskqueue to avoid this. 766ec125fbbSEdward Tomasz Napierala */ 767ec125fbbSEdward Tomasz Napierala TASK_INIT(&rule->rr_task, 0, rctl_rule_free, rule); 768ec125fbbSEdward Tomasz Napierala taskqueue_enqueue(taskqueue_thread, &rule->rr_task); 769ec125fbbSEdward Tomasz Napierala } 770ec125fbbSEdward Tomasz Napierala } 771ec125fbbSEdward Tomasz Napierala 772ec125fbbSEdward Tomasz Napierala static int 773ec125fbbSEdward Tomasz Napierala rctl_rule_fully_specified(const struct rctl_rule *rule) 774ec125fbbSEdward Tomasz Napierala { 775ec125fbbSEdward Tomasz Napierala 776ec125fbbSEdward Tomasz Napierala switch (rule->rr_subject_type) { 777ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_UNDEFINED: 778ec125fbbSEdward Tomasz Napierala return (0); 779ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_PROCESS: 780ec125fbbSEdward Tomasz Napierala if (rule->rr_subject.rs_proc == NULL) 781ec125fbbSEdward Tomasz Napierala return (0); 782ec125fbbSEdward Tomasz Napierala break; 783ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 784ec125fbbSEdward Tomasz Napierala if (rule->rr_subject.rs_uip == NULL) 785ec125fbbSEdward Tomasz Napierala return (0); 786ec125fbbSEdward Tomasz Napierala break; 787ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 788415896e3SEdward Tomasz Napierala if (rule->rr_subject.rs_loginclass == NULL) 789ec125fbbSEdward Tomasz Napierala return (0); 790ec125fbbSEdward Tomasz Napierala break; 791ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 792a7ad07bfSEdward Tomasz Napierala if (rule->rr_subject.rs_prison_racct == NULL) 793ec125fbbSEdward Tomasz Napierala return (0); 794ec125fbbSEdward Tomasz Napierala break; 795ec125fbbSEdward Tomasz Napierala default: 796ec125fbbSEdward Tomasz Napierala panic("rctl_rule_fully_specified: unknown subject type %d", 797ec125fbbSEdward Tomasz Napierala rule->rr_subject_type); 798ec125fbbSEdward Tomasz Napierala } 799ec125fbbSEdward Tomasz Napierala if (rule->rr_resource == RACCT_UNDEFINED) 800ec125fbbSEdward Tomasz Napierala return (0); 801ec125fbbSEdward Tomasz Napierala if (rule->rr_action == RCTL_ACTION_UNDEFINED) 802ec125fbbSEdward Tomasz Napierala return (0); 803ec125fbbSEdward Tomasz Napierala if (rule->rr_amount == RCTL_AMOUNT_UNDEFINED) 804ec125fbbSEdward Tomasz Napierala return (0); 805ec125fbbSEdward Tomasz Napierala if (rule->rr_per == RCTL_SUBJECT_TYPE_UNDEFINED) 806ec125fbbSEdward Tomasz Napierala return (0); 807ec125fbbSEdward Tomasz Napierala 808ec125fbbSEdward Tomasz Napierala return (1); 809ec125fbbSEdward Tomasz Napierala } 810ec125fbbSEdward Tomasz Napierala 811ec125fbbSEdward Tomasz Napierala static int 812ec125fbbSEdward Tomasz Napierala rctl_string_to_rule(char *rulestr, struct rctl_rule **rulep) 813ec125fbbSEdward Tomasz Napierala { 814ec125fbbSEdward Tomasz Napierala int error = 0; 815ec125fbbSEdward Tomasz Napierala char *subjectstr, *subject_idstr, *resourcestr, *actionstr, 816ec125fbbSEdward Tomasz Napierala *amountstr, *perstr; 817ec125fbbSEdward Tomasz Napierala struct rctl_rule *rule; 818ec125fbbSEdward Tomasz Napierala id_t id; 819ec125fbbSEdward Tomasz Napierala 820ec125fbbSEdward Tomasz Napierala rule = rctl_rule_alloc(M_WAITOK); 821ec125fbbSEdward Tomasz Napierala 822ec125fbbSEdward Tomasz Napierala subjectstr = strsep(&rulestr, ":"); 823ec125fbbSEdward Tomasz Napierala subject_idstr = strsep(&rulestr, ":"); 824ec125fbbSEdward Tomasz Napierala resourcestr = strsep(&rulestr, ":"); 825ec125fbbSEdward Tomasz Napierala actionstr = strsep(&rulestr, "=/"); 826ec125fbbSEdward Tomasz Napierala amountstr = strsep(&rulestr, "/"); 827ec125fbbSEdward Tomasz Napierala perstr = rulestr; 828ec125fbbSEdward Tomasz Napierala 829ec125fbbSEdward Tomasz Napierala if (subjectstr == NULL || subjectstr[0] == '\0') 830ec125fbbSEdward Tomasz Napierala rule->rr_subject_type = RCTL_SUBJECT_TYPE_UNDEFINED; 831ec125fbbSEdward Tomasz Napierala else { 832ec125fbbSEdward Tomasz Napierala error = str2value(subjectstr, &rule->rr_subject_type, subjectnames); 833ec125fbbSEdward Tomasz Napierala if (error != 0) 834ec125fbbSEdward Tomasz Napierala goto out; 835ec125fbbSEdward Tomasz Napierala } 836ec125fbbSEdward Tomasz Napierala 837ec125fbbSEdward Tomasz Napierala if (subject_idstr == NULL || subject_idstr[0] == '\0') { 838ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_proc = NULL; 839ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_uip = NULL; 840415896e3SEdward Tomasz Napierala rule->rr_subject.rs_loginclass = NULL; 841a7ad07bfSEdward Tomasz Napierala rule->rr_subject.rs_prison_racct = NULL; 842ec125fbbSEdward Tomasz Napierala } else { 843ec125fbbSEdward Tomasz Napierala switch (rule->rr_subject_type) { 844ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_UNDEFINED: 845ec125fbbSEdward Tomasz Napierala error = EINVAL; 846ec125fbbSEdward Tomasz Napierala goto out; 847ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_PROCESS: 848ec125fbbSEdward Tomasz Napierala error = str2id(subject_idstr, &id); 849ec125fbbSEdward Tomasz Napierala if (error != 0) 850ec125fbbSEdward Tomasz Napierala goto out; 851ec125fbbSEdward Tomasz Napierala sx_assert(&allproc_lock, SA_LOCKED); 852ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_proc = pfind(id); 853ec125fbbSEdward Tomasz Napierala if (rule->rr_subject.rs_proc == NULL) { 854ec125fbbSEdward Tomasz Napierala error = ESRCH; 855ec125fbbSEdward Tomasz Napierala goto out; 856ec125fbbSEdward Tomasz Napierala } 857ec125fbbSEdward Tomasz Napierala PROC_UNLOCK(rule->rr_subject.rs_proc); 858ec125fbbSEdward Tomasz Napierala break; 859ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 860ec125fbbSEdward Tomasz Napierala error = str2id(subject_idstr, &id); 861ec125fbbSEdward Tomasz Napierala if (error != 0) 862ec125fbbSEdward Tomasz Napierala goto out; 863ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_uip = uifind(id); 864ec125fbbSEdward Tomasz Napierala break; 865ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 866415896e3SEdward Tomasz Napierala rule->rr_subject.rs_loginclass = 867ec125fbbSEdward Tomasz Napierala loginclass_find(subject_idstr); 868415896e3SEdward Tomasz Napierala if (rule->rr_subject.rs_loginclass == NULL) { 869ec125fbbSEdward Tomasz Napierala error = ENAMETOOLONG; 870ec125fbbSEdward Tomasz Napierala goto out; 871ec125fbbSEdward Tomasz Napierala } 872ec125fbbSEdward Tomasz Napierala break; 873ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 874a7ad07bfSEdward Tomasz Napierala rule->rr_subject.rs_prison_racct = 875a7ad07bfSEdward Tomasz Napierala prison_racct_find(subject_idstr); 876a7ad07bfSEdward Tomasz Napierala if (rule->rr_subject.rs_prison_racct == NULL) { 877a7ad07bfSEdward Tomasz Napierala error = ENAMETOOLONG; 878ec125fbbSEdward Tomasz Napierala goto out; 879ec125fbbSEdward Tomasz Napierala } 880ec125fbbSEdward Tomasz Napierala break; 881ec125fbbSEdward Tomasz Napierala default: 882ec125fbbSEdward Tomasz Napierala panic("rctl_string_to_rule: unknown subject type %d", 883ec125fbbSEdward Tomasz Napierala rule->rr_subject_type); 884ec125fbbSEdward Tomasz Napierala } 885ec125fbbSEdward Tomasz Napierala } 886ec125fbbSEdward Tomasz Napierala 887ec125fbbSEdward Tomasz Napierala if (resourcestr == NULL || resourcestr[0] == '\0') 888ec125fbbSEdward Tomasz Napierala rule->rr_resource = RACCT_UNDEFINED; 889ec125fbbSEdward Tomasz Napierala else { 890ec125fbbSEdward Tomasz Napierala error = str2value(resourcestr, &rule->rr_resource, 891ec125fbbSEdward Tomasz Napierala resourcenames); 892ec125fbbSEdward Tomasz Napierala if (error != 0) 893ec125fbbSEdward Tomasz Napierala goto out; 894ec125fbbSEdward Tomasz Napierala } 895ec125fbbSEdward Tomasz Napierala 896ec125fbbSEdward Tomasz Napierala if (actionstr == NULL || actionstr[0] == '\0') 897ec125fbbSEdward Tomasz Napierala rule->rr_action = RCTL_ACTION_UNDEFINED; 898ec125fbbSEdward Tomasz Napierala else { 899ec125fbbSEdward Tomasz Napierala error = str2value(actionstr, &rule->rr_action, actionnames); 900ec125fbbSEdward Tomasz Napierala if (error != 0) 901ec125fbbSEdward Tomasz Napierala goto out; 902ec125fbbSEdward Tomasz Napierala } 903ec125fbbSEdward Tomasz Napierala 904ec125fbbSEdward Tomasz Napierala if (amountstr == NULL || amountstr[0] == '\0') 905ec125fbbSEdward Tomasz Napierala rule->rr_amount = RCTL_AMOUNT_UNDEFINED; 906ec125fbbSEdward Tomasz Napierala else { 907ec125fbbSEdward Tomasz Napierala error = str2int64(amountstr, &rule->rr_amount); 908ec125fbbSEdward Tomasz Napierala if (error != 0) 909ec125fbbSEdward Tomasz Napierala goto out; 910*4fe84775SEdward Tomasz Napierala if (RACCT_IS_IN_THOUSANDS(rule->rr_resource)) 911ec125fbbSEdward Tomasz Napierala rule->rr_amount *= 1000; 912ec125fbbSEdward Tomasz Napierala } 913ec125fbbSEdward Tomasz Napierala 914ec125fbbSEdward Tomasz Napierala if (perstr == NULL || perstr[0] == '\0') 915ec125fbbSEdward Tomasz Napierala rule->rr_per = RCTL_SUBJECT_TYPE_UNDEFINED; 916ec125fbbSEdward Tomasz Napierala else { 917ec125fbbSEdward Tomasz Napierala error = str2value(perstr, &rule->rr_per, subjectnames); 918ec125fbbSEdward Tomasz Napierala if (error != 0) 919ec125fbbSEdward Tomasz Napierala goto out; 920ec125fbbSEdward Tomasz Napierala } 921ec125fbbSEdward Tomasz Napierala 922ec125fbbSEdward Tomasz Napierala out: 923ec125fbbSEdward Tomasz Napierala if (error == 0) 924ec125fbbSEdward Tomasz Napierala *rulep = rule; 925ec125fbbSEdward Tomasz Napierala else 926ec125fbbSEdward Tomasz Napierala rctl_rule_release(rule); 927ec125fbbSEdward Tomasz Napierala 928ec125fbbSEdward Tomasz Napierala return (error); 929ec125fbbSEdward Tomasz Napierala } 930ec125fbbSEdward Tomasz Napierala 931ec125fbbSEdward Tomasz Napierala /* 932ec125fbbSEdward Tomasz Napierala * Link a rule with all the subjects it applies to. 933ec125fbbSEdward Tomasz Napierala */ 934ec125fbbSEdward Tomasz Napierala int 935ec125fbbSEdward Tomasz Napierala rctl_rule_add(struct rctl_rule *rule) 936ec125fbbSEdward Tomasz Napierala { 937ec125fbbSEdward Tomasz Napierala struct proc *p; 938ec125fbbSEdward Tomasz Napierala struct ucred *cred; 939ec125fbbSEdward Tomasz Napierala struct uidinfo *uip; 940ec125fbbSEdward Tomasz Napierala struct prison *pr; 941a7ad07bfSEdward Tomasz Napierala struct prison_racct *prr; 942ec125fbbSEdward Tomasz Napierala struct loginclass *lc; 943ec125fbbSEdward Tomasz Napierala struct rctl_rule *rule2; 944ec125fbbSEdward Tomasz Napierala int match; 945ec125fbbSEdward Tomasz Napierala 946ec125fbbSEdward Tomasz Napierala KASSERT(rctl_rule_fully_specified(rule), ("rule not fully specified")); 947ec125fbbSEdward Tomasz Napierala 948ec125fbbSEdward Tomasz Napierala /* 949ec125fbbSEdward Tomasz Napierala * Some rules just don't make sense. Note that the one below 950*4fe84775SEdward Tomasz Napierala * cannot be rewritten using RACCT_IS_DENIABLE(); the RACCT_PCTCPU, 951ec125fbbSEdward Tomasz Napierala * for example, is not deniable in the racct sense, but the 952ec125fbbSEdward Tomasz Napierala * limit is enforced in a different way, so "deny" rules for %CPU 953ec125fbbSEdward Tomasz Napierala * do make sense. 954ec125fbbSEdward Tomasz Napierala */ 955ec125fbbSEdward Tomasz Napierala if (rule->rr_action == RCTL_ACTION_DENY && 956ec125fbbSEdward Tomasz Napierala (rule->rr_resource == RACCT_CPU || 957ec125fbbSEdward Tomasz Napierala rule->rr_resource == RACCT_WALLCLOCK)) 958ec125fbbSEdward Tomasz Napierala return (EOPNOTSUPP); 959ec125fbbSEdward Tomasz Napierala 960ec125fbbSEdward Tomasz Napierala if (rule->rr_per == RCTL_SUBJECT_TYPE_PROCESS && 961*4fe84775SEdward Tomasz Napierala RACCT_IS_SLOPPY(rule->rr_resource)) 962ec125fbbSEdward Tomasz Napierala return (EOPNOTSUPP); 963ec125fbbSEdward Tomasz Napierala 964ec125fbbSEdward Tomasz Napierala /* 965ec125fbbSEdward Tomasz Napierala * Make sure there are no duplicated rules. Also, for the "deny" 966ec125fbbSEdward Tomasz Napierala * rules, remove ones differing only by "amount". 967ec125fbbSEdward Tomasz Napierala */ 968ec125fbbSEdward Tomasz Napierala if (rule->rr_action == RCTL_ACTION_DENY) { 969ec125fbbSEdward Tomasz Napierala rule2 = rctl_rule_duplicate(rule, M_WAITOK); 970ec125fbbSEdward Tomasz Napierala rule2->rr_amount = RCTL_AMOUNT_UNDEFINED; 971ec125fbbSEdward Tomasz Napierala rctl_rule_remove(rule2); 972ec125fbbSEdward Tomasz Napierala rctl_rule_release(rule2); 973ec125fbbSEdward Tomasz Napierala } else 974ec125fbbSEdward Tomasz Napierala rctl_rule_remove(rule); 975ec125fbbSEdward Tomasz Napierala 976ec125fbbSEdward Tomasz Napierala switch (rule->rr_subject_type) { 977ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_PROCESS: 978ec125fbbSEdward Tomasz Napierala p = rule->rr_subject.rs_proc; 979ec125fbbSEdward Tomasz Napierala KASSERT(p != NULL, ("rctl_rule_add: NULL proc")); 980ec125fbbSEdward Tomasz Napierala /* 981ec125fbbSEdward Tomasz Napierala * No resource limits for system processes. 982ec125fbbSEdward Tomasz Napierala */ 983ec125fbbSEdward Tomasz Napierala if (p->p_flag & P_SYSTEM) 984ec125fbbSEdward Tomasz Napierala return (EPERM); 985ec125fbbSEdward Tomasz Napierala 986ec125fbbSEdward Tomasz Napierala rctl_racct_add_rule(p->p_racct, rule); 987ec125fbbSEdward Tomasz Napierala /* 988ec125fbbSEdward Tomasz Napierala * In case of per-process rule, we don't have anything more 989ec125fbbSEdward Tomasz Napierala * to do. 990ec125fbbSEdward Tomasz Napierala */ 991ec125fbbSEdward Tomasz Napierala return (0); 992ec125fbbSEdward Tomasz Napierala 993ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 994ec125fbbSEdward Tomasz Napierala uip = rule->rr_subject.rs_uip; 995ec125fbbSEdward Tomasz Napierala KASSERT(uip != NULL, ("rctl_rule_add: NULL uip")); 996ec125fbbSEdward Tomasz Napierala rctl_racct_add_rule(uip->ui_racct, rule); 997ec125fbbSEdward Tomasz Napierala break; 998ec125fbbSEdward Tomasz Napierala 999ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 1000415896e3SEdward Tomasz Napierala lc = rule->rr_subject.rs_loginclass; 1001ec125fbbSEdward Tomasz Napierala KASSERT(lc != NULL, ("rctl_rule_add: NULL loginclass")); 1002ec125fbbSEdward Tomasz Napierala rctl_racct_add_rule(lc->lc_racct, rule); 1003ec125fbbSEdward Tomasz Napierala break; 1004ec125fbbSEdward Tomasz Napierala 1005ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 1006a7ad07bfSEdward Tomasz Napierala prr = rule->rr_subject.rs_prison_racct; 1007a7ad07bfSEdward Tomasz Napierala KASSERT(prr != NULL, ("rctl_rule_add: NULL pr")); 1008a7ad07bfSEdward Tomasz Napierala rctl_racct_add_rule(prr->prr_racct, rule); 1009ec125fbbSEdward Tomasz Napierala break; 1010ec125fbbSEdward Tomasz Napierala 1011ec125fbbSEdward Tomasz Napierala default: 1012ec125fbbSEdward Tomasz Napierala panic("rctl_rule_add: unknown subject type %d", 1013ec125fbbSEdward Tomasz Napierala rule->rr_subject_type); 1014ec125fbbSEdward Tomasz Napierala } 1015ec125fbbSEdward Tomasz Napierala 1016ec125fbbSEdward Tomasz Napierala /* 1017ec125fbbSEdward Tomasz Napierala * Now go through all the processes and add the new rule to the ones 1018ec125fbbSEdward Tomasz Napierala * it applies to. 1019ec125fbbSEdward Tomasz Napierala */ 1020ec125fbbSEdward Tomasz Napierala sx_assert(&allproc_lock, SA_LOCKED); 1021ec125fbbSEdward Tomasz Napierala FOREACH_PROC_IN_SYSTEM(p) { 1022ec125fbbSEdward Tomasz Napierala if (p->p_flag & P_SYSTEM) 1023ec125fbbSEdward Tomasz Napierala continue; 1024ec125fbbSEdward Tomasz Napierala cred = p->p_ucred; 1025ec125fbbSEdward Tomasz Napierala switch (rule->rr_subject_type) { 1026ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 1027ec125fbbSEdward Tomasz Napierala if (cred->cr_uidinfo == rule->rr_subject.rs_uip || 1028ec125fbbSEdward Tomasz Napierala cred->cr_ruidinfo == rule->rr_subject.rs_uip) 1029ec125fbbSEdward Tomasz Napierala break; 1030ec125fbbSEdward Tomasz Napierala continue; 1031ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 1032415896e3SEdward Tomasz Napierala if (cred->cr_loginclass == rule->rr_subject.rs_loginclass) 1033ec125fbbSEdward Tomasz Napierala break; 1034ec125fbbSEdward Tomasz Napierala continue; 1035ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 1036ec125fbbSEdward Tomasz Napierala match = 0; 1037ec125fbbSEdward Tomasz Napierala for (pr = cred->cr_prison; pr != NULL; pr = pr->pr_parent) { 1038a7ad07bfSEdward Tomasz Napierala if (pr->pr_prison_racct == rule->rr_subject.rs_prison_racct) { 1039ec125fbbSEdward Tomasz Napierala match = 1; 1040ec125fbbSEdward Tomasz Napierala break; 1041ec125fbbSEdward Tomasz Napierala } 1042ec125fbbSEdward Tomasz Napierala } 1043ec125fbbSEdward Tomasz Napierala if (match) 1044ec125fbbSEdward Tomasz Napierala break; 1045ec125fbbSEdward Tomasz Napierala continue; 1046ec125fbbSEdward Tomasz Napierala default: 1047ec125fbbSEdward Tomasz Napierala panic("rctl_rule_add: unknown subject type %d", 1048ec125fbbSEdward Tomasz Napierala rule->rr_subject_type); 1049ec125fbbSEdward Tomasz Napierala } 1050ec125fbbSEdward Tomasz Napierala 1051ec125fbbSEdward Tomasz Napierala rctl_racct_add_rule(p->p_racct, rule); 1052ec125fbbSEdward Tomasz Napierala } 1053ec125fbbSEdward Tomasz Napierala 1054ec125fbbSEdward Tomasz Napierala return (0); 1055ec125fbbSEdward Tomasz Napierala } 1056ec125fbbSEdward Tomasz Napierala 1057ec125fbbSEdward Tomasz Napierala static void 1058ec125fbbSEdward Tomasz Napierala rctl_rule_remove_callback(struct racct *racct, void *arg2, void *arg3) 1059ec125fbbSEdward Tomasz Napierala { 1060ec125fbbSEdward Tomasz Napierala struct rctl_rule *filter = (struct rctl_rule *)arg2; 1061ec125fbbSEdward Tomasz Napierala int found = 0; 1062ec125fbbSEdward Tomasz Napierala 1063ec125fbbSEdward Tomasz Napierala rw_wlock(&rctl_lock); 1064ec125fbbSEdward Tomasz Napierala found += rctl_racct_remove_rules(racct, filter); 1065ec125fbbSEdward Tomasz Napierala rw_wunlock(&rctl_lock); 1066ec125fbbSEdward Tomasz Napierala 1067ec125fbbSEdward Tomasz Napierala *((int *)arg3) += found; 1068ec125fbbSEdward Tomasz Napierala } 1069ec125fbbSEdward Tomasz Napierala 1070ec125fbbSEdward Tomasz Napierala /* 1071ec125fbbSEdward Tomasz Napierala * Remove all rules that match the filter. 1072ec125fbbSEdward Tomasz Napierala */ 1073ec125fbbSEdward Tomasz Napierala int 1074ec125fbbSEdward Tomasz Napierala rctl_rule_remove(struct rctl_rule *filter) 1075ec125fbbSEdward Tomasz Napierala { 1076ec125fbbSEdward Tomasz Napierala int found = 0; 1077ec125fbbSEdward Tomasz Napierala struct proc *p; 1078ec125fbbSEdward Tomasz Napierala 1079ec125fbbSEdward Tomasz Napierala if (filter->rr_subject_type == RCTL_SUBJECT_TYPE_PROCESS && 1080ec125fbbSEdward Tomasz Napierala filter->rr_subject.rs_proc != NULL) { 1081ec125fbbSEdward Tomasz Napierala p = filter->rr_subject.rs_proc; 1082ec125fbbSEdward Tomasz Napierala rw_wlock(&rctl_lock); 1083ec125fbbSEdward Tomasz Napierala found = rctl_racct_remove_rules(p->p_racct, filter); 1084ec125fbbSEdward Tomasz Napierala rw_wunlock(&rctl_lock); 1085ec125fbbSEdward Tomasz Napierala if (found) 1086ec125fbbSEdward Tomasz Napierala return (0); 1087ec125fbbSEdward Tomasz Napierala return (ESRCH); 1088ec125fbbSEdward Tomasz Napierala } 1089ec125fbbSEdward Tomasz Napierala 1090ec125fbbSEdward Tomasz Napierala loginclass_racct_foreach(rctl_rule_remove_callback, filter, 1091ec125fbbSEdward Tomasz Napierala (void *)&found); 1092ec125fbbSEdward Tomasz Napierala ui_racct_foreach(rctl_rule_remove_callback, filter, 1093ec125fbbSEdward Tomasz Napierala (void *)&found); 1094ec125fbbSEdward Tomasz Napierala prison_racct_foreach(rctl_rule_remove_callback, filter, 1095ec125fbbSEdward Tomasz Napierala (void *)&found); 1096ec125fbbSEdward Tomasz Napierala 1097ec125fbbSEdward Tomasz Napierala sx_assert(&allproc_lock, SA_LOCKED); 1098ec125fbbSEdward Tomasz Napierala rw_wlock(&rctl_lock); 1099ec125fbbSEdward Tomasz Napierala FOREACH_PROC_IN_SYSTEM(p) { 1100ec125fbbSEdward Tomasz Napierala found += rctl_racct_remove_rules(p->p_racct, filter); 1101ec125fbbSEdward Tomasz Napierala } 1102ec125fbbSEdward Tomasz Napierala rw_wunlock(&rctl_lock); 1103ec125fbbSEdward Tomasz Napierala 1104ec125fbbSEdward Tomasz Napierala if (found) 1105ec125fbbSEdward Tomasz Napierala return (0); 1106ec125fbbSEdward Tomasz Napierala return (ESRCH); 1107ec125fbbSEdward Tomasz Napierala } 1108ec125fbbSEdward Tomasz Napierala 1109ec125fbbSEdward Tomasz Napierala /* 1110ec125fbbSEdward Tomasz Napierala * Appends a rule to the sbuf. 1111ec125fbbSEdward Tomasz Napierala */ 1112ec125fbbSEdward Tomasz Napierala static void 1113ec125fbbSEdward Tomasz Napierala rctl_rule_to_sbuf(struct sbuf *sb, const struct rctl_rule *rule) 1114ec125fbbSEdward Tomasz Napierala { 1115ec125fbbSEdward Tomasz Napierala int64_t amount; 1116ec125fbbSEdward Tomasz Napierala 1117ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, "%s:", rctl_subject_type_name(rule->rr_subject_type)); 1118ec125fbbSEdward Tomasz Napierala 1119ec125fbbSEdward Tomasz Napierala switch (rule->rr_subject_type) { 1120ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_PROCESS: 1121ec125fbbSEdward Tomasz Napierala if (rule->rr_subject.rs_proc == NULL) 1122ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, ":"); 1123ec125fbbSEdward Tomasz Napierala else 1124ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, "%d:", 1125ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_proc->p_pid); 1126ec125fbbSEdward Tomasz Napierala break; 1127ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 1128ec125fbbSEdward Tomasz Napierala if (rule->rr_subject.rs_uip == NULL) 1129ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, ":"); 1130ec125fbbSEdward Tomasz Napierala else 1131ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, "%d:", 1132ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_uip->ui_uid); 1133ec125fbbSEdward Tomasz Napierala break; 1134ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 1135415896e3SEdward Tomasz Napierala if (rule->rr_subject.rs_loginclass == NULL) 1136ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, ":"); 1137ec125fbbSEdward Tomasz Napierala else 1138ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, "%s:", 1139415896e3SEdward Tomasz Napierala rule->rr_subject.rs_loginclass->lc_name); 1140ec125fbbSEdward Tomasz Napierala break; 1141ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 1142a7ad07bfSEdward Tomasz Napierala if (rule->rr_subject.rs_prison_racct == NULL) 1143ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, ":"); 1144ec125fbbSEdward Tomasz Napierala else 1145ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, "%s:", 1146a7ad07bfSEdward Tomasz Napierala rule->rr_subject.rs_prison_racct->prr_name); 1147ec125fbbSEdward Tomasz Napierala break; 1148ec125fbbSEdward Tomasz Napierala default: 1149ec125fbbSEdward Tomasz Napierala panic("rctl_rule_to_sbuf: unknown subject type %d", 1150ec125fbbSEdward Tomasz Napierala rule->rr_subject_type); 1151ec125fbbSEdward Tomasz Napierala } 1152ec125fbbSEdward Tomasz Napierala 1153ec125fbbSEdward Tomasz Napierala amount = rule->rr_amount; 1154ec125fbbSEdward Tomasz Napierala if (amount != RCTL_AMOUNT_UNDEFINED && 1155*4fe84775SEdward Tomasz Napierala RACCT_IS_IN_THOUSANDS(rule->rr_resource)) 1156ec125fbbSEdward Tomasz Napierala amount /= 1000; 1157ec125fbbSEdward Tomasz Napierala 1158ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, "%s:%s=%jd", 1159ec125fbbSEdward Tomasz Napierala rctl_resource_name(rule->rr_resource), 1160ec125fbbSEdward Tomasz Napierala rctl_action_name(rule->rr_action), 1161ec125fbbSEdward Tomasz Napierala amount); 1162ec125fbbSEdward Tomasz Napierala 1163ec125fbbSEdward Tomasz Napierala if (rule->rr_per != rule->rr_subject_type) 1164ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, "/%s", rctl_subject_type_name(rule->rr_per)); 1165ec125fbbSEdward Tomasz Napierala } 1166ec125fbbSEdward Tomasz Napierala 1167ec125fbbSEdward Tomasz Napierala /* 1168ec125fbbSEdward Tomasz Napierala * Routine used by RCTL syscalls to read in input string. 1169ec125fbbSEdward Tomasz Napierala */ 1170ec125fbbSEdward Tomasz Napierala static int 1171ec125fbbSEdward Tomasz Napierala rctl_read_inbuf(char **inputstr, const char *inbufp, size_t inbuflen) 1172ec125fbbSEdward Tomasz Napierala { 1173ec125fbbSEdward Tomasz Napierala int error; 1174ec125fbbSEdward Tomasz Napierala char *str; 1175ec125fbbSEdward Tomasz Napierala 1176ec125fbbSEdward Tomasz Napierala if (inbuflen <= 0) 1177ec125fbbSEdward Tomasz Napierala return (EINVAL); 1178ec125fbbSEdward Tomasz Napierala 1179ec125fbbSEdward Tomasz Napierala str = malloc(inbuflen + 1, M_RCTL, M_WAITOK); 1180ec125fbbSEdward Tomasz Napierala error = copyinstr(inbufp, str, inbuflen, NULL); 1181ec125fbbSEdward Tomasz Napierala if (error != 0) { 1182ec125fbbSEdward Tomasz Napierala free(str, M_RCTL); 1183ec125fbbSEdward Tomasz Napierala return (error); 1184ec125fbbSEdward Tomasz Napierala } 1185ec125fbbSEdward Tomasz Napierala 1186ec125fbbSEdward Tomasz Napierala *inputstr = str; 1187ec125fbbSEdward Tomasz Napierala 1188ec125fbbSEdward Tomasz Napierala return (0); 1189ec125fbbSEdward Tomasz Napierala } 1190ec125fbbSEdward Tomasz Napierala 1191ec125fbbSEdward Tomasz Napierala /* 1192ec125fbbSEdward Tomasz Napierala * Routine used by RCTL syscalls to write out output string. 1193ec125fbbSEdward Tomasz Napierala */ 1194ec125fbbSEdward Tomasz Napierala static int 1195ec125fbbSEdward Tomasz Napierala rctl_write_outbuf(struct sbuf *outputsbuf, char *outbufp, size_t outbuflen) 1196ec125fbbSEdward Tomasz Napierala { 1197ec125fbbSEdward Tomasz Napierala int error; 1198ec125fbbSEdward Tomasz Napierala 1199ec125fbbSEdward Tomasz Napierala if (outputsbuf == NULL) 1200ec125fbbSEdward Tomasz Napierala return (0); 1201ec125fbbSEdward Tomasz Napierala 1202ec125fbbSEdward Tomasz Napierala sbuf_finish(outputsbuf); 1203ec125fbbSEdward Tomasz Napierala if (outbuflen < sbuf_len(outputsbuf) + 1) { 1204ec125fbbSEdward Tomasz Napierala sbuf_delete(outputsbuf); 1205ec125fbbSEdward Tomasz Napierala return (ERANGE); 1206ec125fbbSEdward Tomasz Napierala } 1207ec125fbbSEdward Tomasz Napierala error = copyout(sbuf_data(outputsbuf), outbufp, 1208ec125fbbSEdward Tomasz Napierala sbuf_len(outputsbuf) + 1); 1209ec125fbbSEdward Tomasz Napierala sbuf_delete(outputsbuf); 1210ec125fbbSEdward Tomasz Napierala return (error); 1211ec125fbbSEdward Tomasz Napierala } 1212ec125fbbSEdward Tomasz Napierala 1213ec125fbbSEdward Tomasz Napierala static struct sbuf * 1214ec125fbbSEdward Tomasz Napierala rctl_racct_to_sbuf(struct racct *racct, int sloppy) 1215ec125fbbSEdward Tomasz Napierala { 1216ec125fbbSEdward Tomasz Napierala int i; 1217ec125fbbSEdward Tomasz Napierala int64_t amount; 1218ec125fbbSEdward Tomasz Napierala struct sbuf *sb; 1219ec125fbbSEdward Tomasz Napierala 1220ec125fbbSEdward Tomasz Napierala sb = sbuf_new_auto(); 1221ec125fbbSEdward Tomasz Napierala for (i = 0; i <= RACCT_MAX; i++) { 1222*4fe84775SEdward Tomasz Napierala if (sloppy == 0 && RACCT_IS_SLOPPY(i)) 1223ec125fbbSEdward Tomasz Napierala continue; 1224ec125fbbSEdward Tomasz Napierala amount = racct->r_resources[i]; 1225*4fe84775SEdward Tomasz Napierala if (RACCT_IS_IN_THOUSANDS(i)) 1226ec125fbbSEdward Tomasz Napierala amount /= 1000; 1227ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, "%s=%jd,", rctl_resource_name(i), amount); 1228ec125fbbSEdward Tomasz Napierala } 1229ec125fbbSEdward Tomasz Napierala sbuf_setpos(sb, sbuf_len(sb) - 1); 1230ec125fbbSEdward Tomasz Napierala return (sb); 1231ec125fbbSEdward Tomasz Napierala } 1232ec125fbbSEdward Tomasz Napierala 1233ec125fbbSEdward Tomasz Napierala int 1234ec125fbbSEdward Tomasz Napierala rctl_get_racct(struct thread *td, struct rctl_get_racct_args *uap) 1235ec125fbbSEdward Tomasz Napierala { 1236ec125fbbSEdward Tomasz Napierala int error; 1237ec125fbbSEdward Tomasz Napierala char *inputstr; 1238ec125fbbSEdward Tomasz Napierala struct rctl_rule *filter; 1239ec125fbbSEdward Tomasz Napierala struct sbuf *outputsbuf = NULL; 1240ec125fbbSEdward Tomasz Napierala struct proc *p; 1241ec125fbbSEdward Tomasz Napierala struct uidinfo *uip; 1242ec125fbbSEdward Tomasz Napierala struct loginclass *lc; 1243a7ad07bfSEdward Tomasz Napierala struct prison_racct *prr; 1244ec125fbbSEdward Tomasz Napierala 1245415896e3SEdward Tomasz Napierala error = priv_check(td, PRIV_RCTL_GET_RACCT); 1246ec125fbbSEdward Tomasz Napierala if (error != 0) 1247ec125fbbSEdward Tomasz Napierala return (error); 1248ec125fbbSEdward Tomasz Napierala 1249ec125fbbSEdward Tomasz Napierala error = rctl_read_inbuf(&inputstr, uap->inbufp, uap->inbuflen); 1250ec125fbbSEdward Tomasz Napierala if (error != 0) 1251ec125fbbSEdward Tomasz Napierala return (error); 1252ec125fbbSEdward Tomasz Napierala 1253ec125fbbSEdward Tomasz Napierala sx_slock(&allproc_lock); 1254ec125fbbSEdward Tomasz Napierala error = rctl_string_to_rule(inputstr, &filter); 1255ec125fbbSEdward Tomasz Napierala free(inputstr, M_RCTL); 1256ec125fbbSEdward Tomasz Napierala if (error != 0) { 1257ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1258ec125fbbSEdward Tomasz Napierala return (error); 1259ec125fbbSEdward Tomasz Napierala } 1260ec125fbbSEdward Tomasz Napierala 1261ec125fbbSEdward Tomasz Napierala switch (filter->rr_subject_type) { 1262ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_PROCESS: 1263ec125fbbSEdward Tomasz Napierala p = filter->rr_subject.rs_proc; 1264ec125fbbSEdward Tomasz Napierala if (p == NULL) { 1265ec125fbbSEdward Tomasz Napierala error = EINVAL; 1266ec125fbbSEdward Tomasz Napierala goto out; 1267ec125fbbSEdward Tomasz Napierala } 1268ec125fbbSEdward Tomasz Napierala if (p->p_flag & P_SYSTEM) { 1269ec125fbbSEdward Tomasz Napierala error = EINVAL; 1270ec125fbbSEdward Tomasz Napierala goto out; 1271ec125fbbSEdward Tomasz Napierala } 1272ec125fbbSEdward Tomasz Napierala outputsbuf = rctl_racct_to_sbuf(p->p_racct, 0); 1273ec125fbbSEdward Tomasz Napierala break; 1274ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_USER: 1275ec125fbbSEdward Tomasz Napierala uip = filter->rr_subject.rs_uip; 1276ec125fbbSEdward Tomasz Napierala if (uip == NULL) { 1277ec125fbbSEdward Tomasz Napierala error = EINVAL; 1278ec125fbbSEdward Tomasz Napierala goto out; 1279ec125fbbSEdward Tomasz Napierala } 1280ec125fbbSEdward Tomasz Napierala outputsbuf = rctl_racct_to_sbuf(uip->ui_racct, 1); 1281ec125fbbSEdward Tomasz Napierala break; 1282ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_LOGINCLASS: 1283415896e3SEdward Tomasz Napierala lc = filter->rr_subject.rs_loginclass; 1284ec125fbbSEdward Tomasz Napierala if (lc == NULL) { 1285ec125fbbSEdward Tomasz Napierala error = EINVAL; 1286ec125fbbSEdward Tomasz Napierala goto out; 1287ec125fbbSEdward Tomasz Napierala } 1288ec125fbbSEdward Tomasz Napierala outputsbuf = rctl_racct_to_sbuf(lc->lc_racct, 1); 1289ec125fbbSEdward Tomasz Napierala break; 1290ec125fbbSEdward Tomasz Napierala case RCTL_SUBJECT_TYPE_JAIL: 1291a7ad07bfSEdward Tomasz Napierala prr = filter->rr_subject.rs_prison_racct; 1292a7ad07bfSEdward Tomasz Napierala if (prr == NULL) { 1293ec125fbbSEdward Tomasz Napierala error = EINVAL; 1294ec125fbbSEdward Tomasz Napierala goto out; 1295ec125fbbSEdward Tomasz Napierala } 1296a7ad07bfSEdward Tomasz Napierala outputsbuf = rctl_racct_to_sbuf(prr->prr_racct, 1); 1297ec125fbbSEdward Tomasz Napierala break; 1298ec125fbbSEdward Tomasz Napierala default: 1299ec125fbbSEdward Tomasz Napierala error = EINVAL; 1300ec125fbbSEdward Tomasz Napierala } 1301ec125fbbSEdward Tomasz Napierala out: 1302ec125fbbSEdward Tomasz Napierala rctl_rule_release(filter); 1303ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1304ec125fbbSEdward Tomasz Napierala if (error != 0) 1305ec125fbbSEdward Tomasz Napierala return (error); 1306ec125fbbSEdward Tomasz Napierala 1307ec125fbbSEdward Tomasz Napierala error = rctl_write_outbuf(outputsbuf, uap->outbufp, uap->outbuflen); 1308ec125fbbSEdward Tomasz Napierala 1309ec125fbbSEdward Tomasz Napierala return (error); 1310ec125fbbSEdward Tomasz Napierala } 1311ec125fbbSEdward Tomasz Napierala 1312ec125fbbSEdward Tomasz Napierala static void 1313ec125fbbSEdward Tomasz Napierala rctl_get_rules_callback(struct racct *racct, void *arg2, void *arg3) 1314ec125fbbSEdward Tomasz Napierala { 1315ec125fbbSEdward Tomasz Napierala struct rctl_rule *filter = (struct rctl_rule *)arg2; 1316ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 1317ec125fbbSEdward Tomasz Napierala struct sbuf *sb = (struct sbuf *)arg3; 1318ec125fbbSEdward Tomasz Napierala 1319ec125fbbSEdward Tomasz Napierala rw_rlock(&rctl_lock); 1320ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &racct->r_rule_links, rrl_next) { 1321ec125fbbSEdward Tomasz Napierala if (!rctl_rule_matches(link->rrl_rule, filter)) 1322ec125fbbSEdward Tomasz Napierala continue; 1323ec125fbbSEdward Tomasz Napierala rctl_rule_to_sbuf(sb, link->rrl_rule); 1324ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, ","); 1325ec125fbbSEdward Tomasz Napierala } 1326ec125fbbSEdward Tomasz Napierala rw_runlock(&rctl_lock); 1327ec125fbbSEdward Tomasz Napierala } 1328ec125fbbSEdward Tomasz Napierala 1329ec125fbbSEdward Tomasz Napierala int 1330ec125fbbSEdward Tomasz Napierala rctl_get_rules(struct thread *td, struct rctl_get_rules_args *uap) 1331ec125fbbSEdward Tomasz Napierala { 1332ec125fbbSEdward Tomasz Napierala int error; 1333ec125fbbSEdward Tomasz Napierala size_t bufsize = RCTL_DEFAULT_BUFSIZE; 1334ec125fbbSEdward Tomasz Napierala char *inputstr, *buf; 1335ec125fbbSEdward Tomasz Napierala struct sbuf *sb; 1336ec125fbbSEdward Tomasz Napierala struct rctl_rule *filter; 1337ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 1338ec125fbbSEdward Tomasz Napierala struct proc *p; 1339ec125fbbSEdward Tomasz Napierala 1340ec125fbbSEdward Tomasz Napierala error = priv_check(td, PRIV_RCTL_GET_RULES); 1341ec125fbbSEdward Tomasz Napierala if (error != 0) 1342ec125fbbSEdward Tomasz Napierala return (error); 1343ec125fbbSEdward Tomasz Napierala 1344ec125fbbSEdward Tomasz Napierala error = rctl_read_inbuf(&inputstr, uap->inbufp, uap->inbuflen); 1345ec125fbbSEdward Tomasz Napierala if (error != 0) 1346ec125fbbSEdward Tomasz Napierala return (error); 1347ec125fbbSEdward Tomasz Napierala 1348ec125fbbSEdward Tomasz Napierala sx_slock(&allproc_lock); 1349ec125fbbSEdward Tomasz Napierala error = rctl_string_to_rule(inputstr, &filter); 1350ec125fbbSEdward Tomasz Napierala free(inputstr, M_RCTL); 1351ec125fbbSEdward Tomasz Napierala if (error != 0) { 1352ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1353ec125fbbSEdward Tomasz Napierala return (error); 1354ec125fbbSEdward Tomasz Napierala } 1355ec125fbbSEdward Tomasz Napierala 1356ec125fbbSEdward Tomasz Napierala again: 1357ec125fbbSEdward Tomasz Napierala buf = malloc(bufsize, M_RCTL, M_WAITOK); 1358ec125fbbSEdward Tomasz Napierala sb = sbuf_new(NULL, buf, bufsize, SBUF_FIXEDLEN); 1359ec125fbbSEdward Tomasz Napierala KASSERT(sb != NULL, ("sbuf_new failed")); 1360ec125fbbSEdward Tomasz Napierala 1361ec125fbbSEdward Tomasz Napierala sx_assert(&allproc_lock, SA_LOCKED); 1362ec125fbbSEdward Tomasz Napierala FOREACH_PROC_IN_SYSTEM(p) { 1363ec125fbbSEdward Tomasz Napierala rw_rlock(&rctl_lock); 1364ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &p->p_racct->r_rule_links, rrl_next) { 1365ec125fbbSEdward Tomasz Napierala /* 1366ec125fbbSEdward Tomasz Napierala * Non-process rules will be added to the buffer later. 1367ec125fbbSEdward Tomasz Napierala * Adding them here would result in duplicated output. 1368ec125fbbSEdward Tomasz Napierala */ 1369ec125fbbSEdward Tomasz Napierala if (link->rrl_rule->rr_subject_type != 1370ec125fbbSEdward Tomasz Napierala RCTL_SUBJECT_TYPE_PROCESS) 1371ec125fbbSEdward Tomasz Napierala continue; 1372ec125fbbSEdward Tomasz Napierala if (!rctl_rule_matches(link->rrl_rule, filter)) 1373ec125fbbSEdward Tomasz Napierala continue; 1374ec125fbbSEdward Tomasz Napierala rctl_rule_to_sbuf(sb, link->rrl_rule); 1375ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, ","); 1376ec125fbbSEdward Tomasz Napierala } 1377ec125fbbSEdward Tomasz Napierala rw_runlock(&rctl_lock); 1378ec125fbbSEdward Tomasz Napierala } 1379ec125fbbSEdward Tomasz Napierala 1380ec125fbbSEdward Tomasz Napierala loginclass_racct_foreach(rctl_get_rules_callback, filter, sb); 1381ec125fbbSEdward Tomasz Napierala ui_racct_foreach(rctl_get_rules_callback, filter, sb); 1382ec125fbbSEdward Tomasz Napierala prison_racct_foreach(rctl_get_rules_callback, filter, sb); 1383ec125fbbSEdward Tomasz Napierala if (sbuf_error(sb) == ENOMEM) { 1384ec125fbbSEdward Tomasz Napierala sbuf_delete(sb); 1385ec125fbbSEdward Tomasz Napierala free(buf, M_RCTL); 1386ec125fbbSEdward Tomasz Napierala bufsize *= 4; 1387ec125fbbSEdward Tomasz Napierala goto again; 1388ec125fbbSEdward Tomasz Napierala } 1389ec125fbbSEdward Tomasz Napierala 1390ec125fbbSEdward Tomasz Napierala /* 1391ec125fbbSEdward Tomasz Napierala * Remove trailing ",". 1392ec125fbbSEdward Tomasz Napierala */ 1393ec125fbbSEdward Tomasz Napierala if (sbuf_len(sb) > 0) 1394ec125fbbSEdward Tomasz Napierala sbuf_setpos(sb, sbuf_len(sb) - 1); 1395ec125fbbSEdward Tomasz Napierala 1396ec125fbbSEdward Tomasz Napierala error = rctl_write_outbuf(sb, uap->outbufp, uap->outbuflen); 1397ec125fbbSEdward Tomasz Napierala 1398ec125fbbSEdward Tomasz Napierala rctl_rule_release(filter); 1399ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1400ec125fbbSEdward Tomasz Napierala free(buf, M_RCTL); 1401ec125fbbSEdward Tomasz Napierala return (error); 1402ec125fbbSEdward Tomasz Napierala } 1403ec125fbbSEdward Tomasz Napierala 1404ec125fbbSEdward Tomasz Napierala int 1405ec125fbbSEdward Tomasz Napierala rctl_get_limits(struct thread *td, struct rctl_get_limits_args *uap) 1406ec125fbbSEdward Tomasz Napierala { 1407ec125fbbSEdward Tomasz Napierala int error; 1408ec125fbbSEdward Tomasz Napierala size_t bufsize = RCTL_DEFAULT_BUFSIZE; 1409ec125fbbSEdward Tomasz Napierala char *inputstr, *buf; 1410ec125fbbSEdward Tomasz Napierala struct sbuf *sb; 1411ec125fbbSEdward Tomasz Napierala struct rctl_rule *filter; 1412ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 1413ec125fbbSEdward Tomasz Napierala 1414ec125fbbSEdward Tomasz Napierala error = priv_check(td, PRIV_RCTL_GET_LIMITS); 1415ec125fbbSEdward Tomasz Napierala if (error != 0) 1416ec125fbbSEdward Tomasz Napierala return (error); 1417ec125fbbSEdward Tomasz Napierala 1418ec125fbbSEdward Tomasz Napierala error = rctl_read_inbuf(&inputstr, uap->inbufp, uap->inbuflen); 1419ec125fbbSEdward Tomasz Napierala if (error != 0) 1420ec125fbbSEdward Tomasz Napierala return (error); 1421ec125fbbSEdward Tomasz Napierala 1422ec125fbbSEdward Tomasz Napierala sx_slock(&allproc_lock); 1423ec125fbbSEdward Tomasz Napierala error = rctl_string_to_rule(inputstr, &filter); 1424ec125fbbSEdward Tomasz Napierala free(inputstr, M_RCTL); 1425ec125fbbSEdward Tomasz Napierala if (error != 0) { 1426ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1427ec125fbbSEdward Tomasz Napierala return (error); 1428ec125fbbSEdward Tomasz Napierala } 1429ec125fbbSEdward Tomasz Napierala 1430ec125fbbSEdward Tomasz Napierala if (filter->rr_subject_type == RCTL_SUBJECT_TYPE_UNDEFINED) { 1431ec125fbbSEdward Tomasz Napierala rctl_rule_release(filter); 1432ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1433ec125fbbSEdward Tomasz Napierala return (EINVAL); 1434ec125fbbSEdward Tomasz Napierala } 1435ec125fbbSEdward Tomasz Napierala if (filter->rr_subject_type != RCTL_SUBJECT_TYPE_PROCESS) { 1436ec125fbbSEdward Tomasz Napierala rctl_rule_release(filter); 1437ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1438ec125fbbSEdward Tomasz Napierala return (EOPNOTSUPP); 1439ec125fbbSEdward Tomasz Napierala } 1440ec125fbbSEdward Tomasz Napierala if (filter->rr_subject.rs_proc == NULL) { 1441ec125fbbSEdward Tomasz Napierala rctl_rule_release(filter); 1442ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1443ec125fbbSEdward Tomasz Napierala return (EINVAL); 1444ec125fbbSEdward Tomasz Napierala } 1445ec125fbbSEdward Tomasz Napierala 1446ec125fbbSEdward Tomasz Napierala again: 1447ec125fbbSEdward Tomasz Napierala buf = malloc(bufsize, M_RCTL, M_WAITOK); 1448ec125fbbSEdward Tomasz Napierala sb = sbuf_new(NULL, buf, bufsize, SBUF_FIXEDLEN); 1449ec125fbbSEdward Tomasz Napierala KASSERT(sb != NULL, ("sbuf_new failed")); 1450ec125fbbSEdward Tomasz Napierala 1451ec125fbbSEdward Tomasz Napierala rw_rlock(&rctl_lock); 1452ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &filter->rr_subject.rs_proc->p_racct->r_rule_links, 1453ec125fbbSEdward Tomasz Napierala rrl_next) { 1454ec125fbbSEdward Tomasz Napierala rctl_rule_to_sbuf(sb, link->rrl_rule); 1455ec125fbbSEdward Tomasz Napierala sbuf_printf(sb, ","); 1456ec125fbbSEdward Tomasz Napierala } 1457ec125fbbSEdward Tomasz Napierala rw_runlock(&rctl_lock); 1458ec125fbbSEdward Tomasz Napierala if (sbuf_error(sb) == ENOMEM) { 1459ec125fbbSEdward Tomasz Napierala sbuf_delete(sb); 1460ec125fbbSEdward Tomasz Napierala free(buf, M_RCTL); 1461ec125fbbSEdward Tomasz Napierala bufsize *= 4; 1462ec125fbbSEdward Tomasz Napierala goto again; 1463ec125fbbSEdward Tomasz Napierala } 1464ec125fbbSEdward Tomasz Napierala 1465ec125fbbSEdward Tomasz Napierala /* 1466ec125fbbSEdward Tomasz Napierala * Remove trailing ",". 1467ec125fbbSEdward Tomasz Napierala */ 1468ec125fbbSEdward Tomasz Napierala if (sbuf_len(sb) > 0) 1469ec125fbbSEdward Tomasz Napierala sbuf_setpos(sb, sbuf_len(sb) - 1); 1470ec125fbbSEdward Tomasz Napierala 1471ec125fbbSEdward Tomasz Napierala error = rctl_write_outbuf(sb, uap->outbufp, uap->outbuflen); 1472ec125fbbSEdward Tomasz Napierala rctl_rule_release(filter); 1473ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1474ec125fbbSEdward Tomasz Napierala free(buf, M_RCTL); 1475ec125fbbSEdward Tomasz Napierala return (error); 1476ec125fbbSEdward Tomasz Napierala } 1477ec125fbbSEdward Tomasz Napierala 1478ec125fbbSEdward Tomasz Napierala int 1479ec125fbbSEdward Tomasz Napierala rctl_add_rule(struct thread *td, struct rctl_add_rule_args *uap) 1480ec125fbbSEdward Tomasz Napierala { 1481ec125fbbSEdward Tomasz Napierala int error; 1482ec125fbbSEdward Tomasz Napierala struct rctl_rule *rule; 1483ec125fbbSEdward Tomasz Napierala char *inputstr; 1484ec125fbbSEdward Tomasz Napierala 1485ec125fbbSEdward Tomasz Napierala error = priv_check(td, PRIV_RCTL_ADD_RULE); 1486ec125fbbSEdward Tomasz Napierala if (error != 0) 1487ec125fbbSEdward Tomasz Napierala return (error); 1488ec125fbbSEdward Tomasz Napierala 1489ec125fbbSEdward Tomasz Napierala error = rctl_read_inbuf(&inputstr, uap->inbufp, uap->inbuflen); 1490ec125fbbSEdward Tomasz Napierala if (error != 0) 1491ec125fbbSEdward Tomasz Napierala return (error); 1492ec125fbbSEdward Tomasz Napierala 1493ec125fbbSEdward Tomasz Napierala sx_slock(&allproc_lock); 1494ec125fbbSEdward Tomasz Napierala error = rctl_string_to_rule(inputstr, &rule); 1495ec125fbbSEdward Tomasz Napierala free(inputstr, M_RCTL); 1496ec125fbbSEdward Tomasz Napierala if (error != 0) { 1497ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1498ec125fbbSEdward Tomasz Napierala return (error); 1499ec125fbbSEdward Tomasz Napierala } 1500ec125fbbSEdward Tomasz Napierala /* 1501ec125fbbSEdward Tomasz Napierala * The 'per' part of a rule is optional. 1502ec125fbbSEdward Tomasz Napierala */ 1503ec125fbbSEdward Tomasz Napierala if (rule->rr_per == RCTL_SUBJECT_TYPE_UNDEFINED && 1504ec125fbbSEdward Tomasz Napierala rule->rr_subject_type != RCTL_SUBJECT_TYPE_UNDEFINED) 1505ec125fbbSEdward Tomasz Napierala rule->rr_per = rule->rr_subject_type; 1506ec125fbbSEdward Tomasz Napierala 1507ec125fbbSEdward Tomasz Napierala if (!rctl_rule_fully_specified(rule)) { 1508ec125fbbSEdward Tomasz Napierala error = EINVAL; 1509ec125fbbSEdward Tomasz Napierala goto out; 1510ec125fbbSEdward Tomasz Napierala } 1511ec125fbbSEdward Tomasz Napierala 1512ec125fbbSEdward Tomasz Napierala error = rctl_rule_add(rule); 1513ec125fbbSEdward Tomasz Napierala 1514ec125fbbSEdward Tomasz Napierala out: 1515ec125fbbSEdward Tomasz Napierala rctl_rule_release(rule); 1516ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1517ec125fbbSEdward Tomasz Napierala return (error); 1518ec125fbbSEdward Tomasz Napierala } 1519ec125fbbSEdward Tomasz Napierala 1520ec125fbbSEdward Tomasz Napierala int 1521ec125fbbSEdward Tomasz Napierala rctl_remove_rule(struct thread *td, struct rctl_remove_rule_args *uap) 1522ec125fbbSEdward Tomasz Napierala { 1523ec125fbbSEdward Tomasz Napierala int error; 1524ec125fbbSEdward Tomasz Napierala struct rctl_rule *filter; 1525ec125fbbSEdward Tomasz Napierala char *inputstr; 1526ec125fbbSEdward Tomasz Napierala 1527ec125fbbSEdward Tomasz Napierala error = priv_check(td, PRIV_RCTL_REMOVE_RULE); 1528ec125fbbSEdward Tomasz Napierala if (error != 0) 1529ec125fbbSEdward Tomasz Napierala return (error); 1530ec125fbbSEdward Tomasz Napierala 1531ec125fbbSEdward Tomasz Napierala error = rctl_read_inbuf(&inputstr, uap->inbufp, uap->inbuflen); 1532ec125fbbSEdward Tomasz Napierala if (error != 0) 1533ec125fbbSEdward Tomasz Napierala return (error); 1534ec125fbbSEdward Tomasz Napierala 1535ec125fbbSEdward Tomasz Napierala sx_slock(&allproc_lock); 1536ec125fbbSEdward Tomasz Napierala error = rctl_string_to_rule(inputstr, &filter); 1537ec125fbbSEdward Tomasz Napierala free(inputstr, M_RCTL); 1538ec125fbbSEdward Tomasz Napierala if (error != 0) { 1539ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1540ec125fbbSEdward Tomasz Napierala return (error); 1541ec125fbbSEdward Tomasz Napierala } 1542ec125fbbSEdward Tomasz Napierala 1543ec125fbbSEdward Tomasz Napierala error = rctl_rule_remove(filter); 1544ec125fbbSEdward Tomasz Napierala rctl_rule_release(filter); 1545ec125fbbSEdward Tomasz Napierala sx_sunlock(&allproc_lock); 1546ec125fbbSEdward Tomasz Napierala 1547ec125fbbSEdward Tomasz Napierala return (error); 1548ec125fbbSEdward Tomasz Napierala } 1549ec125fbbSEdward Tomasz Napierala 1550ec125fbbSEdward Tomasz Napierala /* 1551ec125fbbSEdward Tomasz Napierala * Update RCTL rule list after credential change. 1552ec125fbbSEdward Tomasz Napierala */ 1553ec125fbbSEdward Tomasz Napierala void 1554ec125fbbSEdward Tomasz Napierala rctl_proc_ucred_changed(struct proc *p, struct ucred *newcred) 1555ec125fbbSEdward Tomasz Napierala { 1556ec125fbbSEdward Tomasz Napierala int rulecnt, i; 1557ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link, *newlink; 1558ec125fbbSEdward Tomasz Napierala struct uidinfo *newuip; 1559ec125fbbSEdward Tomasz Napierala struct loginclass *newlc; 1560a7ad07bfSEdward Tomasz Napierala struct prison_racct *newprr; 1561ec125fbbSEdward Tomasz Napierala LIST_HEAD(, rctl_rule_link) newrules; 1562ec125fbbSEdward Tomasz Napierala 1563ec125fbbSEdward Tomasz Napierala newuip = newcred->cr_ruidinfo; 1564ec125fbbSEdward Tomasz Napierala newlc = newcred->cr_loginclass; 1565a7ad07bfSEdward Tomasz Napierala newprr = newcred->cr_prison->pr_prison_racct; 1566ec125fbbSEdward Tomasz Napierala 1567ec125fbbSEdward Tomasz Napierala LIST_INIT(&newrules); 1568ec125fbbSEdward Tomasz Napierala 1569ec125fbbSEdward Tomasz Napierala again: 1570ec125fbbSEdward Tomasz Napierala /* 1571ec125fbbSEdward Tomasz Napierala * First, count the rules that apply to the process with new 1572ec125fbbSEdward Tomasz Napierala * credentials. 1573ec125fbbSEdward Tomasz Napierala */ 1574ec125fbbSEdward Tomasz Napierala rulecnt = 0; 1575ec125fbbSEdward Tomasz Napierala rw_rlock(&rctl_lock); 1576ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &p->p_racct->r_rule_links, rrl_next) { 1577ec125fbbSEdward Tomasz Napierala if (link->rrl_rule->rr_subject_type == 1578ec125fbbSEdward Tomasz Napierala RCTL_SUBJECT_TYPE_PROCESS) 1579ec125fbbSEdward Tomasz Napierala rulecnt++; 1580ec125fbbSEdward Tomasz Napierala } 1581ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &newuip->ui_racct->r_rule_links, rrl_next) 1582ec125fbbSEdward Tomasz Napierala rulecnt++; 1583ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &newlc->lc_racct->r_rule_links, rrl_next) 1584ec125fbbSEdward Tomasz Napierala rulecnt++; 1585a7ad07bfSEdward Tomasz Napierala LIST_FOREACH(link, &newprr->prr_racct->r_rule_links, rrl_next) 1586ec125fbbSEdward Tomasz Napierala rulecnt++; 1587ec125fbbSEdward Tomasz Napierala rw_runlock(&rctl_lock); 1588ec125fbbSEdward Tomasz Napierala 1589ec125fbbSEdward Tomasz Napierala /* 1590ec125fbbSEdward Tomasz Napierala * Create temporary list. We've dropped the rctl_lock in order 1591ec125fbbSEdward Tomasz Napierala * to use M_WAITOK. 1592ec125fbbSEdward Tomasz Napierala */ 1593ec125fbbSEdward Tomasz Napierala for (i = 0; i < rulecnt; i++) { 1594ec125fbbSEdward Tomasz Napierala newlink = uma_zalloc(rctl_rule_link_zone, M_WAITOK); 1595ec125fbbSEdward Tomasz Napierala newlink->rrl_rule = NULL; 1596ec125fbbSEdward Tomasz Napierala LIST_INSERT_HEAD(&newrules, newlink, rrl_next); 1597ec125fbbSEdward Tomasz Napierala } 1598ec125fbbSEdward Tomasz Napierala 1599ec125fbbSEdward Tomasz Napierala newlink = LIST_FIRST(&newrules); 1600ec125fbbSEdward Tomasz Napierala 1601ec125fbbSEdward Tomasz Napierala /* 1602ec125fbbSEdward Tomasz Napierala * Assign rules to the newly allocated list entries. 1603ec125fbbSEdward Tomasz Napierala */ 1604ec125fbbSEdward Tomasz Napierala rw_wlock(&rctl_lock); 1605ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &p->p_racct->r_rule_links, rrl_next) { 1606ec125fbbSEdward Tomasz Napierala if (link->rrl_rule->rr_subject_type == 1607ec125fbbSEdward Tomasz Napierala RCTL_SUBJECT_TYPE_PROCESS) { 1608ec125fbbSEdward Tomasz Napierala if (newlink == NULL) 1609ec125fbbSEdward Tomasz Napierala goto goaround; 1610ec125fbbSEdward Tomasz Napierala rctl_rule_acquire(link->rrl_rule); 1611ec125fbbSEdward Tomasz Napierala newlink->rrl_rule = link->rrl_rule; 1612ec125fbbSEdward Tomasz Napierala newlink = LIST_NEXT(newlink, rrl_next); 1613ec125fbbSEdward Tomasz Napierala rulecnt--; 1614ec125fbbSEdward Tomasz Napierala } 1615ec125fbbSEdward Tomasz Napierala } 1616ec125fbbSEdward Tomasz Napierala 1617ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &newuip->ui_racct->r_rule_links, rrl_next) { 1618ec125fbbSEdward Tomasz Napierala if (newlink == NULL) 1619ec125fbbSEdward Tomasz Napierala goto goaround; 1620ec125fbbSEdward Tomasz Napierala rctl_rule_acquire(link->rrl_rule); 1621ec125fbbSEdward Tomasz Napierala newlink->rrl_rule = link->rrl_rule; 1622ec125fbbSEdward Tomasz Napierala newlink = LIST_NEXT(newlink, rrl_next); 1623ec125fbbSEdward Tomasz Napierala rulecnt--; 1624ec125fbbSEdward Tomasz Napierala } 1625ec125fbbSEdward Tomasz Napierala 1626ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &newlc->lc_racct->r_rule_links, rrl_next) { 1627ec125fbbSEdward Tomasz Napierala if (newlink == NULL) 1628ec125fbbSEdward Tomasz Napierala goto goaround; 1629ec125fbbSEdward Tomasz Napierala rctl_rule_acquire(link->rrl_rule); 1630ec125fbbSEdward Tomasz Napierala newlink->rrl_rule = link->rrl_rule; 1631ec125fbbSEdward Tomasz Napierala newlink = LIST_NEXT(newlink, rrl_next); 1632ec125fbbSEdward Tomasz Napierala rulecnt--; 1633ec125fbbSEdward Tomasz Napierala } 1634ec125fbbSEdward Tomasz Napierala 1635a7ad07bfSEdward Tomasz Napierala LIST_FOREACH(link, &newprr->prr_racct->r_rule_links, rrl_next) { 1636ec125fbbSEdward Tomasz Napierala if (newlink == NULL) 1637ec125fbbSEdward Tomasz Napierala goto goaround; 1638ec125fbbSEdward Tomasz Napierala rctl_rule_acquire(link->rrl_rule); 1639ec125fbbSEdward Tomasz Napierala newlink->rrl_rule = link->rrl_rule; 1640ec125fbbSEdward Tomasz Napierala newlink = LIST_NEXT(newlink, rrl_next); 1641ec125fbbSEdward Tomasz Napierala rulecnt--; 1642ec125fbbSEdward Tomasz Napierala } 1643ec125fbbSEdward Tomasz Napierala 1644ec125fbbSEdward Tomasz Napierala if (rulecnt == 0) { 1645ec125fbbSEdward Tomasz Napierala /* 1646ec125fbbSEdward Tomasz Napierala * Free the old rule list. 1647ec125fbbSEdward Tomasz Napierala */ 1648ec125fbbSEdward Tomasz Napierala while (!LIST_EMPTY(&p->p_racct->r_rule_links)) { 1649ec125fbbSEdward Tomasz Napierala link = LIST_FIRST(&p->p_racct->r_rule_links); 1650ec125fbbSEdward Tomasz Napierala LIST_REMOVE(link, rrl_next); 1651ec125fbbSEdward Tomasz Napierala rctl_rule_release(link->rrl_rule); 1652ec125fbbSEdward Tomasz Napierala uma_zfree(rctl_rule_link_zone, link); 1653ec125fbbSEdward Tomasz Napierala } 1654ec125fbbSEdward Tomasz Napierala 1655ec125fbbSEdward Tomasz Napierala /* 1656ec125fbbSEdward Tomasz Napierala * Replace lists and we're done. 1657ec125fbbSEdward Tomasz Napierala * 1658ec125fbbSEdward Tomasz Napierala * XXX: Is there any way to switch list heads instead 1659ec125fbbSEdward Tomasz Napierala * of iterating here? 1660ec125fbbSEdward Tomasz Napierala */ 1661ec125fbbSEdward Tomasz Napierala while (!LIST_EMPTY(&newrules)) { 1662ec125fbbSEdward Tomasz Napierala newlink = LIST_FIRST(&newrules); 1663ec125fbbSEdward Tomasz Napierala LIST_REMOVE(newlink, rrl_next); 1664ec125fbbSEdward Tomasz Napierala LIST_INSERT_HEAD(&p->p_racct->r_rule_links, 1665ec125fbbSEdward Tomasz Napierala newlink, rrl_next); 1666ec125fbbSEdward Tomasz Napierala } 1667ec125fbbSEdward Tomasz Napierala 1668ec125fbbSEdward Tomasz Napierala rw_wunlock(&rctl_lock); 1669ec125fbbSEdward Tomasz Napierala 1670ec125fbbSEdward Tomasz Napierala return; 1671ec125fbbSEdward Tomasz Napierala } 1672ec125fbbSEdward Tomasz Napierala 1673ec125fbbSEdward Tomasz Napierala goaround: 1674ec125fbbSEdward Tomasz Napierala rw_wunlock(&rctl_lock); 1675ec125fbbSEdward Tomasz Napierala 1676ec125fbbSEdward Tomasz Napierala /* 1677ec125fbbSEdward Tomasz Napierala * Rule list changed while we were not holding the rctl_lock. 1678ec125fbbSEdward Tomasz Napierala * Free the new list and try again. 1679ec125fbbSEdward Tomasz Napierala */ 1680ec125fbbSEdward Tomasz Napierala while (!LIST_EMPTY(&newrules)) { 1681ec125fbbSEdward Tomasz Napierala newlink = LIST_FIRST(&newrules); 1682ec125fbbSEdward Tomasz Napierala LIST_REMOVE(newlink, rrl_next); 1683ec125fbbSEdward Tomasz Napierala if (newlink->rrl_rule != NULL) 1684ec125fbbSEdward Tomasz Napierala rctl_rule_release(newlink->rrl_rule); 1685ec125fbbSEdward Tomasz Napierala uma_zfree(rctl_rule_link_zone, newlink); 1686ec125fbbSEdward Tomasz Napierala } 1687ec125fbbSEdward Tomasz Napierala 1688ec125fbbSEdward Tomasz Napierala goto again; 1689ec125fbbSEdward Tomasz Napierala } 1690ec125fbbSEdward Tomasz Napierala 1691ec125fbbSEdward Tomasz Napierala /* 1692ec125fbbSEdward Tomasz Napierala * Assign RCTL rules to the newly created process. 1693ec125fbbSEdward Tomasz Napierala */ 1694ec125fbbSEdward Tomasz Napierala int 1695ec125fbbSEdward Tomasz Napierala rctl_proc_fork(struct proc *parent, struct proc *child) 1696ec125fbbSEdward Tomasz Napierala { 1697ec125fbbSEdward Tomasz Napierala int error; 1698ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 1699ec125fbbSEdward Tomasz Napierala struct rctl_rule *rule; 1700ec125fbbSEdward Tomasz Napierala 1701ec125fbbSEdward Tomasz Napierala LIST_INIT(&child->p_racct->r_rule_links); 1702ec125fbbSEdward Tomasz Napierala 1703ec125fbbSEdward Tomasz Napierala /* 1704ec125fbbSEdward Tomasz Napierala * No limits for kernel processes. 1705ec125fbbSEdward Tomasz Napierala */ 1706ec125fbbSEdward Tomasz Napierala if (child->p_flag & P_SYSTEM) 1707ec125fbbSEdward Tomasz Napierala return (0); 1708ec125fbbSEdward Tomasz Napierala 1709ec125fbbSEdward Tomasz Napierala /* 1710ec125fbbSEdward Tomasz Napierala * Nothing to inherit from P_SYSTEM parents. 1711ec125fbbSEdward Tomasz Napierala */ 1712ec125fbbSEdward Tomasz Napierala if (parent->p_racct == NULL) { 1713ec125fbbSEdward Tomasz Napierala KASSERT(parent->p_flag & P_SYSTEM, 1714ec125fbbSEdward Tomasz Napierala ("non-system process without racct; p = %p", parent)); 1715ec125fbbSEdward Tomasz Napierala return (0); 1716ec125fbbSEdward Tomasz Napierala } 1717ec125fbbSEdward Tomasz Napierala 1718ec125fbbSEdward Tomasz Napierala rw_wlock(&rctl_lock); 1719ec125fbbSEdward Tomasz Napierala 1720ec125fbbSEdward Tomasz Napierala /* 1721ec125fbbSEdward Tomasz Napierala * Go through limits applicable to the parent and assign them 1722ec125fbbSEdward Tomasz Napierala * to the child. Rules with 'process' subject have to be duplicated 1723ec125fbbSEdward Tomasz Napierala * in order to make their rr_subject point to the new process. 1724ec125fbbSEdward Tomasz Napierala */ 1725ec125fbbSEdward Tomasz Napierala LIST_FOREACH(link, &parent->p_racct->r_rule_links, rrl_next) { 1726ec125fbbSEdward Tomasz Napierala if (link->rrl_rule->rr_subject_type == 1727ec125fbbSEdward Tomasz Napierala RCTL_SUBJECT_TYPE_PROCESS) { 1728ec125fbbSEdward Tomasz Napierala rule = rctl_rule_duplicate(link->rrl_rule, M_NOWAIT); 1729ec125fbbSEdward Tomasz Napierala if (rule == NULL) 1730ec125fbbSEdward Tomasz Napierala goto fail; 1731ec125fbbSEdward Tomasz Napierala KASSERT(rule->rr_subject.rs_proc == parent, 1732ec125fbbSEdward Tomasz Napierala ("rule->rr_subject.rs_proc != parent")); 1733ec125fbbSEdward Tomasz Napierala rule->rr_subject.rs_proc = child; 1734ec125fbbSEdward Tomasz Napierala error = rctl_racct_add_rule_locked(child->p_racct, 1735ec125fbbSEdward Tomasz Napierala rule); 1736ec125fbbSEdward Tomasz Napierala rctl_rule_release(rule); 1737ec125fbbSEdward Tomasz Napierala if (error != 0) 1738ec125fbbSEdward Tomasz Napierala goto fail; 1739ec125fbbSEdward Tomasz Napierala } else { 1740ec125fbbSEdward Tomasz Napierala error = rctl_racct_add_rule_locked(child->p_racct, 1741ec125fbbSEdward Tomasz Napierala link->rrl_rule); 1742ec125fbbSEdward Tomasz Napierala if (error != 0) 1743ec125fbbSEdward Tomasz Napierala goto fail; 1744ec125fbbSEdward Tomasz Napierala } 1745ec125fbbSEdward Tomasz Napierala } 1746ec125fbbSEdward Tomasz Napierala 1747ec125fbbSEdward Tomasz Napierala rw_wunlock(&rctl_lock); 1748ec125fbbSEdward Tomasz Napierala return (0); 1749ec125fbbSEdward Tomasz Napierala 1750ec125fbbSEdward Tomasz Napierala fail: 1751ec125fbbSEdward Tomasz Napierala while (!LIST_EMPTY(&child->p_racct->r_rule_links)) { 1752ec125fbbSEdward Tomasz Napierala link = LIST_FIRST(&child->p_racct->r_rule_links); 1753ec125fbbSEdward Tomasz Napierala LIST_REMOVE(link, rrl_next); 1754ec125fbbSEdward Tomasz Napierala rctl_rule_release(link->rrl_rule); 1755ec125fbbSEdward Tomasz Napierala uma_zfree(rctl_rule_link_zone, link); 1756ec125fbbSEdward Tomasz Napierala } 1757ec125fbbSEdward Tomasz Napierala rw_wunlock(&rctl_lock); 1758ec125fbbSEdward Tomasz Napierala return (EAGAIN); 1759ec125fbbSEdward Tomasz Napierala } 1760ec125fbbSEdward Tomasz Napierala 1761ec125fbbSEdward Tomasz Napierala /* 1762ec125fbbSEdward Tomasz Napierala * Release rules attached to the racct. 1763ec125fbbSEdward Tomasz Napierala */ 1764ec125fbbSEdward Tomasz Napierala void 1765ec125fbbSEdward Tomasz Napierala rctl_racct_release(struct racct *racct) 1766ec125fbbSEdward Tomasz Napierala { 1767ec125fbbSEdward Tomasz Napierala struct rctl_rule_link *link; 1768ec125fbbSEdward Tomasz Napierala 1769ec125fbbSEdward Tomasz Napierala rw_wlock(&rctl_lock); 1770ec125fbbSEdward Tomasz Napierala while (!LIST_EMPTY(&racct->r_rule_links)) { 1771ec125fbbSEdward Tomasz Napierala link = LIST_FIRST(&racct->r_rule_links); 1772ec125fbbSEdward Tomasz Napierala LIST_REMOVE(link, rrl_next); 1773ec125fbbSEdward Tomasz Napierala rctl_rule_release(link->rrl_rule); 1774ec125fbbSEdward Tomasz Napierala uma_zfree(rctl_rule_link_zone, link); 1775ec125fbbSEdward Tomasz Napierala } 1776ec125fbbSEdward Tomasz Napierala rw_wunlock(&rctl_lock); 1777ec125fbbSEdward Tomasz Napierala } 1778ec125fbbSEdward Tomasz Napierala 1779ec125fbbSEdward Tomasz Napierala static void 1780ec125fbbSEdward Tomasz Napierala rctl_init(void) 1781ec125fbbSEdward Tomasz Napierala { 1782ec125fbbSEdward Tomasz Napierala 1783ec125fbbSEdward Tomasz Napierala rctl_rule_link_zone = uma_zcreate("rctl_rule_link", 1784ec125fbbSEdward Tomasz Napierala sizeof(struct rctl_rule_link), NULL, NULL, NULL, NULL, 1785ec125fbbSEdward Tomasz Napierala UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 1786ec125fbbSEdward Tomasz Napierala rctl_rule_zone = uma_zcreate("rctl_rule", sizeof(struct rctl_rule), 1787ec125fbbSEdward Tomasz Napierala NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 1788ec125fbbSEdward Tomasz Napierala } 1789ec125fbbSEdward Tomasz Napierala 1790ec125fbbSEdward Tomasz Napierala #else /* !RCTL */ 1791ec125fbbSEdward Tomasz Napierala 1792ec125fbbSEdward Tomasz Napierala int 1793ec125fbbSEdward Tomasz Napierala rctl_get_racct(struct thread *td, struct rctl_get_racct_args *uap) 1794ec125fbbSEdward Tomasz Napierala { 1795ec125fbbSEdward Tomasz Napierala 1796ec125fbbSEdward Tomasz Napierala return (ENOSYS); 1797ec125fbbSEdward Tomasz Napierala } 1798ec125fbbSEdward Tomasz Napierala 1799ec125fbbSEdward Tomasz Napierala int 1800ec125fbbSEdward Tomasz Napierala rctl_get_rules(struct thread *td, struct rctl_get_rules_args *uap) 1801ec125fbbSEdward Tomasz Napierala { 1802ec125fbbSEdward Tomasz Napierala 1803ec125fbbSEdward Tomasz Napierala return (ENOSYS); 1804ec125fbbSEdward Tomasz Napierala } 1805ec125fbbSEdward Tomasz Napierala 1806ec125fbbSEdward Tomasz Napierala int 1807ec125fbbSEdward Tomasz Napierala rctl_get_limits(struct thread *td, struct rctl_get_limits_args *uap) 1808ec125fbbSEdward Tomasz Napierala { 1809ec125fbbSEdward Tomasz Napierala 1810ec125fbbSEdward Tomasz Napierala return (ENOSYS); 1811ec125fbbSEdward Tomasz Napierala } 1812ec125fbbSEdward Tomasz Napierala 1813ec125fbbSEdward Tomasz Napierala int 1814ec125fbbSEdward Tomasz Napierala rctl_add_rule(struct thread *td, struct rctl_add_rule_args *uap) 1815ec125fbbSEdward Tomasz Napierala { 1816ec125fbbSEdward Tomasz Napierala 1817ec125fbbSEdward Tomasz Napierala return (ENOSYS); 1818ec125fbbSEdward Tomasz Napierala } 1819ec125fbbSEdward Tomasz Napierala 1820ec125fbbSEdward Tomasz Napierala int 1821ec125fbbSEdward Tomasz Napierala rctl_remove_rule(struct thread *td, struct rctl_remove_rule_args *uap) 1822ec125fbbSEdward Tomasz Napierala { 1823ec125fbbSEdward Tomasz Napierala 1824ec125fbbSEdward Tomasz Napierala return (ENOSYS); 1825ec125fbbSEdward Tomasz Napierala } 1826ec125fbbSEdward Tomasz Napierala 1827ec125fbbSEdward Tomasz Napierala #endif /* !RCTL */ 1828