1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _SYS_RCTL_H 27 #define _SYS_RCTL_H 28 29 #pragma ident "%Z%%M% %I% %E% SMI" 30 31 #include <sys/kmem.h> 32 #include <sys/resource.h> 33 #include <sys/types.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /* 40 * Available local actions and flags. 41 */ 42 #define RCTL_LOCAL_NOACTION 0x00000000 43 #define RCTL_LOCAL_SIGNAL 0x00000001 44 #define RCTL_LOCAL_DENY 0x00000002 45 46 #define RCTL_LOCAL_MAXIMAL 0x80000000 47 48 #define RCTL_LOCAL_ACTION_MASK 0xffff0000 49 #define RCTL_LOCAL_MASK 0x80000003 50 51 /* 52 * Available global actions and flags. 53 */ 54 #define RCTL_GLOBAL_NOACTION 0x00000000 55 #define RCTL_GLOBAL_SYSLOG 0x00000001 56 57 #define RCTL_GLOBAL_NOBASIC 0x80000000 58 #define RCTL_GLOBAL_LOWERABLE 0x40000000 59 #define RCTL_GLOBAL_DENY_ALWAYS 0x20000000 60 #define RCTL_GLOBAL_DENY_NEVER 0x10000000 61 #define RCTL_GLOBAL_FILE_SIZE 0x08000000 62 #define RCTL_GLOBAL_CPU_TIME 0x04000000 63 #define RCTL_GLOBAL_SIGNAL_NEVER 0x02000000 64 #define RCTL_GLOBAL_NOLOCALACTION RCTL_GLOBAL_SIGNAL_NEVER 65 #define RCTL_GLOBAL_INFINITE 0x01000000 66 #define RCTL_GLOBAL_UNOBSERVABLE 0x00800000 67 #define RCTL_GLOBAL_SYSLOG_NEVER 0x00080000 68 69 #define RCTL_GLOBAL_BYTES 0x00400000 70 #define RCTL_GLOBAL_SECONDS 0x00200000 71 #define RCTL_GLOBAL_COUNT 0x00100000 72 73 #define RCTL_GLOBAL_ACTION_MASK 0xffff0000 74 #define RCTL_GLOBAL_MASK 0xfff80001 75 76 /* 77 * getrctl(2) flag values 78 */ 79 #define RCTL_FIRST 0x00000000 80 #define RCTL_NEXT 0x00000001 81 #define RCTL_USAGE 0x00000002 82 83 /* 84 * setrctl(2) flag values 85 */ 86 87 #define RCTL_INSERT 0x00000000 88 #define RCTL_DELETE 0x00000001 89 #define RCTL_REPLACE 0x00000002 90 91 #define RCTL_USE_RECIPIENT_PID 0x10000000 92 93 #define RCTLSYS_ACTION_MASK 0xffff0000 94 #define RCTLSYS_MASK 0x10000003 95 96 /* 97 * rctl_priv_t: rctl privilege defined values 98 * A large amount of space has been deliberately left between these privileges 99 * to permit future enrichment of the control privilege value. 100 */ 101 #define RCPRIV_BASIC 0x01000000 102 #define RCPRIV_PRIVILEGED 0x04000000 103 #define RCPRIV_SYSTEM 0x07000000 104 105 typedef u_longlong_t rctl_qty_t; /* resource control numerical values */ 106 typedef int rctl_priv_t; 107 108 typedef struct rctlblk rctlblk_t; 109 110 extern int setrctl(const char *, rctlblk_t *, rctlblk_t *, int); 111 extern int getrctl(const char *, rctlblk_t *, rctlblk_t *, int); 112 113 typedef enum { 114 RCENTITY_PROCESS, 115 RCENTITY_TASK, 116 RCENTITY_PROJECT, 117 RCENTITY_ZONE 118 } rctl_entity_t; 119 #define RC_MAX_ENTITY RCENTITY_ZONE 120 121 #ifndef _KERNEL 122 123 typedef struct rctl_set rctl_set_t; 124 125 #else /* _KERNEL */ 126 127 #include <sys/mutex.h> 128 129 /* 130 * rctl_test return bitfield 131 */ 132 #define RCT_NONE 0x00000000 133 #define RCT_DENY 0x00000001 134 #define RCT_SIGNAL 0x00000002 135 #define RCT_STRLOG 0x00000004 136 137 #define RCT_LK_ABANDONED 0x80000000 138 139 /* 140 * rctl_set_dup flags 141 */ 142 #define RCD_DUP 0x1 143 #define RCD_CALLBACK 0x2 144 145 /* 146 * rctl_action/rctl_test action safety states 147 */ 148 #define RCA_SAFE 0x0 /* safe for signal and siginfo delivery */ 149 #define RCA_UNSAFE_SIGINFO 0x1 /* not safe to allocate for siginfo */ 150 #define RCA_UNSAFE_ALL 0x2 /* not safe to send signal */ 151 152 typedef struct rctl_val { 153 struct rctl_val *rcv_prev; /* previous (lower) value */ 154 struct rctl_val *rcv_next; /* next (higher) value */ 155 rctl_priv_t rcv_privilege; /* appropriate RCPRIV_* cst */ 156 rctl_qty_t rcv_value; /* enforced value of control */ 157 uint_t rcv_flagaction; /* properties and actions */ 158 int rcv_action_signal; /* signal to send as action */ 159 struct proc *rcv_action_recipient; /* process to receive signal */ 160 id_t rcv_action_recip_pid; /* pid of that process */ 161 hrtime_t rcv_firing_time; /* time rctl_val last fired */ 162 } rctl_val_t; 163 164 typedef int rctl_hndl_t; 165 166 struct rctl; 167 struct proc; 168 struct task; 169 struct kproject; 170 struct zone; 171 172 typedef struct rctl_entity_p_struct { 173 rctl_entity_t rcep_t; 174 union { 175 struct proc *proc; 176 struct task *task; 177 struct kproject *proj; 178 struct zone *zone; 179 } rcep_p; 180 } rctl_entity_p_t; 181 182 typedef struct rctl_ops { 183 void (*rco_action)(struct rctl *, struct proc *, 184 rctl_entity_p_t *); 185 rctl_qty_t (*rco_get_usage)(struct rctl *, struct proc *); 186 int (*rco_set)(struct rctl *, struct proc *, 187 rctl_entity_p_t *, rctl_qty_t); 188 int (*rco_test)(struct rctl *, struct proc *, 189 rctl_entity_p_t *, rctl_val_t *, rctl_qty_t, uint_t); 190 } rctl_ops_t; 191 192 #define RCTLOP_ACTION(r, p, e) (r->rc_dict_entry->rcd_ops->rco_action(r, p, e)) 193 #define RCTLOP_GET_USAGE(r, p) (r->rc_dict_entry->rcd_ops->rco_get_usage(r, p)) 194 #define RCTLOP_SET(r, p, e, v) (r->rc_dict_entry->rcd_ops->rco_set(r, p, e, v)) 195 #define RCTLOP_TEST(r, p, e, v, i, f) \ 196 (r->rc_dict_entry->rcd_ops->rco_test(r, p, e, v, i, f)) 197 198 /* 199 * Default resource control callback functions. 200 */ 201 void rcop_no_action(struct rctl *, struct proc *, rctl_entity_p_t *); 202 rctl_qty_t rcop_no_usage(struct rctl *, struct proc *); 203 int rcop_no_set(struct rctl *, struct proc *, rctl_entity_p_t *, rctl_qty_t); 204 int rcop_no_test(struct rctl *, struct proc *, rctl_entity_p_t *, 205 struct rctl_val *, rctl_qty_t, uint_t); 206 int rcop_absolute_test(struct rctl *, struct proc *, rctl_entity_p_t *, 207 struct rctl_val *, rctl_qty_t, uint_t); 208 209 extern rctl_ops_t rctl_default_ops; 210 extern rctl_ops_t rctl_absolute_ops; 211 212 typedef struct rctl { 213 struct rctl *rc_next; /* next in set hash chain */ 214 rctl_val_t *rc_values; /* list of enforced value */ 215 rctl_val_t *rc_cursor; /* currently enforced value */ 216 struct rctl_dict_entry *rc_dict_entry; /* global control properties */ 217 rctl_hndl_t rc_id; /* control handle (hash key) */ 218 } rctl_t; 219 220 /* 221 * The rctl_set is the collection of resource controls associated with an 222 * individual entity within the system. All of the controls are applicable to 223 * the same entity, which we call out explicitly in rcs_entity. 224 */ 225 typedef struct rctl_set { 226 kmutex_t rcs_lock; /* global set lock */ 227 rctl_entity_t rcs_entity; /* entity type */ 228 rctl_t **rcs_ctls; /* hash table of controls */ 229 } rctl_set_t; 230 231 typedef struct rctl_dict_entry { 232 struct rctl_dict_entry *rcd_next; /* next in dict hash chain */ 233 char *rcd_name; /* resource control name */ 234 rctl_val_t *rcd_default_value; /* system control value */ 235 rctl_ops_t *rcd_ops; /* callback operations */ 236 rctl_hndl_t rcd_id; /* control handle */ 237 rctl_entity_t rcd_entity; /* entity type */ 238 int rcd_flagaction; /* global properties/actions */ 239 int rcd_syslog_level; /* event syslog level */ 240 int rcd_strlog_flags; /* derived from syslog level */ 241 rctl_qty_t rcd_max_native; /* native model "infinity" */ 242 rctl_qty_t rcd_max_ilp32; /* ILP32 model "infinity" */ 243 } rctl_dict_entry_t; 244 245 typedef struct rctl_alloc_gp { 246 uint_t rcag_nctls; /* number of rctls needed/allocated */ 247 uint_t rcag_nvals; /* number of rctl values needed/allocated */ 248 rctl_t *rcag_ctls; /* list of allocated rctls */ 249 rctl_val_t *rcag_vals; /* list of allocated rctl values */ 250 } rctl_alloc_gp_t; 251 252 extern kmem_cache_t *rctl_cache; /* kmem cache for rctl structures */ 253 extern kmem_cache_t *rctl_val_cache; /* kmem cache for rctl values */ 254 255 extern rctl_hndl_t rctlproc_legacy[]; 256 extern uint_t rctlproc_flags[]; 257 extern int rctlproc_signals[]; 258 259 void rctl_init(void); 260 void rctlproc_init(void); 261 void rctlproc_default_init(struct proc *, rctl_alloc_gp_t *); 262 263 rctl_hndl_t rctl_register(const char *, rctl_entity_t, int, rctl_qty_t, 264 rctl_qty_t, rctl_ops_t *); 265 266 rctl_hndl_t rctl_hndl_lookup(const char *); 267 rctl_dict_entry_t *rctl_dict_lookup(const char *); 268 rctl_dict_entry_t *rctl_dict_lookup_hndl(rctl_hndl_t); 269 void rctl_add_default_limit(const char *, rctl_qty_t, rctl_priv_t, uint_t); 270 void rctl_add_legacy_limit(const char *, const char *, const char *, 271 rctl_qty_t, rctl_qty_t); 272 273 rctl_qty_t rctl_model_maximum(rctl_dict_entry_t *, struct proc *); 274 rctl_qty_t rctl_model_value(rctl_dict_entry_t *, struct proc *, rctl_qty_t); 275 276 int rctl_invalid_value(rctl_dict_entry_t *, rctl_val_t *); 277 rctl_qty_t rctl_enforced_value(rctl_hndl_t, rctl_set_t *, struct proc *); 278 279 int rctl_test(rctl_hndl_t, rctl_set_t *, struct proc *, rctl_qty_t, uint_t); 280 int rctl_action(rctl_hndl_t, rctl_set_t *, struct proc *, uint_t); 281 282 int rctl_test_entity(rctl_hndl_t, rctl_set_t *, struct proc *, 283 rctl_entity_p_t *, rctl_qty_t, uint_t); 284 int rctl_action_entity(rctl_hndl_t, rctl_set_t *, struct proc *, 285 rctl_entity_p_t *, uint_t); 286 287 int rctl_val_cmp(rctl_val_t *, rctl_val_t *, int); 288 int rctl_val_list_insert(rctl_val_t **, rctl_val_t *); 289 290 rctl_set_t *rctl_set_create(void); 291 rctl_alloc_gp_t *rctl_set_init_prealloc(rctl_entity_t); 292 rctl_set_t *rctl_set_init(rctl_entity_t, struct proc *, rctl_entity_p_t *, 293 rctl_set_t *, rctl_alloc_gp_t *); 294 rctl_alloc_gp_t *rctl_set_dup_prealloc(rctl_set_t *); 295 int rctl_set_dup_ready(rctl_set_t *, rctl_alloc_gp_t *); 296 rctl_set_t *rctl_set_dup(rctl_set_t *, struct proc *, struct proc *, 297 rctl_entity_p_t *, rctl_set_t *, rctl_alloc_gp_t *, int); 298 void rctl_set_reset(rctl_set_t *, struct proc *, rctl_entity_p_t *); 299 void rctl_set_tearoff(rctl_set_t *, struct proc *); 300 void rctl_set_free(rctl_set_t *); 301 302 void rctl_prealloc_destroy(rctl_alloc_gp_t *); 303 304 size_t rctl_build_name_buf(char **); 305 306 int rctl_global_get(const char *name, rctl_dict_entry_t *); 307 int rctl_global_set(const char *name, rctl_dict_entry_t *); 308 309 int rctl_local_delete(rctl_hndl_t, rctl_val_t *, struct proc *p); 310 int rctl_local_insert(rctl_hndl_t, rctl_val_t *, struct proc *p); 311 int rctl_local_get(rctl_hndl_t, rctl_val_t *, rctl_val_t *, struct proc *p); 312 int rctl_local_replace(rctl_hndl_t, rctl_val_t *, rctl_val_t *, 313 struct proc *p); 314 315 /* tag declaration to appease the compiler */ 316 struct cred; 317 rctl_alloc_gp_t *rctl_rlimit_set_prealloc(uint_t); 318 int rctl_rlimit_set(rctl_hndl_t, struct proc *, struct rlimit64 *, 319 rctl_alloc_gp_t *, int, int, const struct cred *); 320 int rctl_rlimit_get(rctl_hndl_t, struct proc *, struct rlimit64 *); 321 322 #endif /* _KERNEL */ 323 324 #ifdef __cplusplus 325 } 326 #endif 327 328 #endif /* _SYS_RCTL_H */ 329