1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28*0Sstevel@tonic-gate /* All Rights Reserved */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate #include <sys/types.h> 34*0Sstevel@tonic-gate #include <sys/sysmacros.h> 35*0Sstevel@tonic-gate #include <sys/param.h> 36*0Sstevel@tonic-gate #include <sys/systm.h> 37*0Sstevel@tonic-gate #include <sys/acct.h> 38*0Sstevel@tonic-gate #include <sys/cred.h> 39*0Sstevel@tonic-gate #include <sys/user.h> 40*0Sstevel@tonic-gate #include <sys/errno.h> 41*0Sstevel@tonic-gate #include <sys/file.h> 42*0Sstevel@tonic-gate #include <sys/vnode.h> 43*0Sstevel@tonic-gate #include <sys/debug.h> 44*0Sstevel@tonic-gate #include <sys/proc.h> 45*0Sstevel@tonic-gate #include <sys/resource.h> 46*0Sstevel@tonic-gate #include <sys/session.h> 47*0Sstevel@tonic-gate #include <sys/modctl.h> 48*0Sstevel@tonic-gate #include <sys/syscall.h> 49*0Sstevel@tonic-gate #include <sys/policy.h> 50*0Sstevel@tonic-gate #include <sys/list.h> 51*0Sstevel@tonic-gate #include <sys/time.h> 52*0Sstevel@tonic-gate #include <sys/msacct.h> 53*0Sstevel@tonic-gate #include <sys/zone.h> 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate /* 56*0Sstevel@tonic-gate * Each zone has its own accounting settings (on or off) and associated 57*0Sstevel@tonic-gate * file. The global zone is not special in this aspect; it will only 58*0Sstevel@tonic-gate * generate records for processes that ran in the global zone. We could 59*0Sstevel@tonic-gate * allow the global zone to record all activity on the system, but there 60*0Sstevel@tonic-gate * would be no way of knowing the zone in which the processes executed. 61*0Sstevel@tonic-gate * sysacct() is thus virtualized to only act on the caller's zone. 62*0Sstevel@tonic-gate */ 63*0Sstevel@tonic-gate struct acct_globals { 64*0Sstevel@tonic-gate struct acct acctbuf; 65*0Sstevel@tonic-gate kmutex_t aclock; 66*0Sstevel@tonic-gate struct vnode *acctvp; 67*0Sstevel@tonic-gate list_node_t aclink; 68*0Sstevel@tonic-gate }; 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate /* 71*0Sstevel@tonic-gate * We need a list of all accounting settings for all zones, so we can 72*0Sstevel@tonic-gate * accurately determine if a file is in use for accounting (possibly by 73*0Sstevel@tonic-gate * another zone). 74*0Sstevel@tonic-gate */ 75*0Sstevel@tonic-gate static zone_key_t acct_zone_key; 76*0Sstevel@tonic-gate static list_t acct_list; 77*0Sstevel@tonic-gate kmutex_t acct_list_lock; 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate static struct sysent acctsysent = { 80*0Sstevel@tonic-gate 1, 81*0Sstevel@tonic-gate SE_NOUNLOAD | SE_ARGC | SE_32RVAL1, 82*0Sstevel@tonic-gate sysacct 83*0Sstevel@tonic-gate }; 84*0Sstevel@tonic-gate 85*0Sstevel@tonic-gate static struct modlsys modlsys = { 86*0Sstevel@tonic-gate &mod_syscallops, "acct(2) syscall", &acctsysent 87*0Sstevel@tonic-gate }; 88*0Sstevel@tonic-gate 89*0Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL 90*0Sstevel@tonic-gate static struct modlsys modlsys32 = { 91*0Sstevel@tonic-gate &mod_syscallops32, "32-bit acct(2) syscall", &acctsysent 92*0Sstevel@tonic-gate }; 93*0Sstevel@tonic-gate #endif 94*0Sstevel@tonic-gate 95*0Sstevel@tonic-gate static struct modlinkage modlinkage = { 96*0Sstevel@tonic-gate MODREV_1, 97*0Sstevel@tonic-gate &modlsys, 98*0Sstevel@tonic-gate #ifdef _SYSCALL32_IMPL 99*0Sstevel@tonic-gate &modlsys32, 100*0Sstevel@tonic-gate #endif 101*0Sstevel@tonic-gate NULL 102*0Sstevel@tonic-gate }; 103*0Sstevel@tonic-gate 104*0Sstevel@tonic-gate /*ARGSUSED*/ 105*0Sstevel@tonic-gate static void * 106*0Sstevel@tonic-gate acct_init(zoneid_t zoneid) 107*0Sstevel@tonic-gate { 108*0Sstevel@tonic-gate struct acct_globals *ag; 109*0Sstevel@tonic-gate 110*0Sstevel@tonic-gate ag = kmem_alloc(sizeof (*ag), KM_SLEEP); 111*0Sstevel@tonic-gate bzero(&ag->acctbuf, sizeof (ag->acctbuf)); 112*0Sstevel@tonic-gate mutex_init(&ag->aclock, NULL, MUTEX_DEFAULT, NULL); 113*0Sstevel@tonic-gate ag->acctvp = NULL; 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate mutex_enter(&acct_list_lock); 116*0Sstevel@tonic-gate list_insert_tail(&acct_list, ag); 117*0Sstevel@tonic-gate mutex_exit(&acct_list_lock); 118*0Sstevel@tonic-gate return (ag); 119*0Sstevel@tonic-gate } 120*0Sstevel@tonic-gate 121*0Sstevel@tonic-gate /* ARGSUSED */ 122*0Sstevel@tonic-gate static void 123*0Sstevel@tonic-gate acct_shutdown(zoneid_t zoneid, void *arg) 124*0Sstevel@tonic-gate { 125*0Sstevel@tonic-gate struct acct_globals *ag = arg; 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate mutex_enter(&ag->aclock); 128*0Sstevel@tonic-gate if (ag->acctvp) { 129*0Sstevel@tonic-gate /* 130*0Sstevel@tonic-gate * This needs to be done as a shutdown callback, otherwise this 131*0Sstevel@tonic-gate * held vnode may cause filesystems to be busy, and the zone 132*0Sstevel@tonic-gate * shutdown operation to fail. 133*0Sstevel@tonic-gate */ 134*0Sstevel@tonic-gate (void) VOP_CLOSE(ag->acctvp, FWRITE, 1, (offset_t)0, kcred); 135*0Sstevel@tonic-gate VN_RELE(ag->acctvp); 136*0Sstevel@tonic-gate } 137*0Sstevel@tonic-gate ag->acctvp = NULL; 138*0Sstevel@tonic-gate mutex_exit(&ag->aclock); 139*0Sstevel@tonic-gate } 140*0Sstevel@tonic-gate 141*0Sstevel@tonic-gate /*ARGSUSED*/ 142*0Sstevel@tonic-gate static void 143*0Sstevel@tonic-gate acct_fini(zoneid_t zoneid, void *arg) 144*0Sstevel@tonic-gate { 145*0Sstevel@tonic-gate struct acct_globals *ag = arg; 146*0Sstevel@tonic-gate 147*0Sstevel@tonic-gate mutex_enter(&acct_list_lock); 148*0Sstevel@tonic-gate list_remove(&acct_list, ag); 149*0Sstevel@tonic-gate mutex_exit(&acct_list_lock); 150*0Sstevel@tonic-gate 151*0Sstevel@tonic-gate mutex_destroy(&ag->aclock); 152*0Sstevel@tonic-gate kmem_free(ag, sizeof (*ag)); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate int 156*0Sstevel@tonic-gate _init(void) 157*0Sstevel@tonic-gate { 158*0Sstevel@tonic-gate int error; 159*0Sstevel@tonic-gate 160*0Sstevel@tonic-gate mutex_init(&acct_list_lock, NULL, MUTEX_DEFAULT, NULL); 161*0Sstevel@tonic-gate list_create(&acct_list, sizeof (struct acct_globals), 162*0Sstevel@tonic-gate offsetof(struct acct_globals, aclink)); 163*0Sstevel@tonic-gate /* 164*0Sstevel@tonic-gate * Using an initializer here wastes a bit of memory for zones that 165*0Sstevel@tonic-gate * don't use accounting, but vastly simplifies the locking. 166*0Sstevel@tonic-gate */ 167*0Sstevel@tonic-gate zone_key_create(&acct_zone_key, acct_init, acct_shutdown, acct_fini); 168*0Sstevel@tonic-gate if ((error = mod_install(&modlinkage)) != 0) { 169*0Sstevel@tonic-gate (void) zone_key_delete(acct_zone_key); 170*0Sstevel@tonic-gate list_destroy(&acct_list); 171*0Sstevel@tonic-gate mutex_destroy(&acct_list_lock); 172*0Sstevel@tonic-gate } 173*0Sstevel@tonic-gate return (error); 174*0Sstevel@tonic-gate } 175*0Sstevel@tonic-gate 176*0Sstevel@tonic-gate int 177*0Sstevel@tonic-gate _info(struct modinfo *modinfop) 178*0Sstevel@tonic-gate { 179*0Sstevel@tonic-gate return (mod_info(&modlinkage, modinfop)); 180*0Sstevel@tonic-gate } 181*0Sstevel@tonic-gate 182*0Sstevel@tonic-gate /* 183*0Sstevel@tonic-gate * acct() is a "weak stub" routine called from exit(). 184*0Sstevel@tonic-gate * Once this module has been loaded, we refuse to allow 185*0Sstevel@tonic-gate * it to unload - otherwise accounting would quietly 186*0Sstevel@tonic-gate * cease. See 1211661. It's possible to make this module 187*0Sstevel@tonic-gate * unloadable but it's substantially safer not to bother. 188*0Sstevel@tonic-gate */ 189*0Sstevel@tonic-gate int 190*0Sstevel@tonic-gate _fini(void) 191*0Sstevel@tonic-gate { 192*0Sstevel@tonic-gate return (EBUSY); 193*0Sstevel@tonic-gate } 194*0Sstevel@tonic-gate 195*0Sstevel@tonic-gate /* 196*0Sstevel@tonic-gate * See if vp is in use by the accounting system on any zone. This does a deep 197*0Sstevel@tonic-gate * comparison of vnodes such that a file and a lofs "shadow" node of it will 198*0Sstevel@tonic-gate * appear to be the same. 199*0Sstevel@tonic-gate * 200*0Sstevel@tonic-gate * If 'compare_vfs' is true, the function will do a comparison of vfs_t's 201*0Sstevel@tonic-gate * instead (ie, is the vfs_t on which the vnode resides in use by the 202*0Sstevel@tonic-gate * accounting system in any zone). 203*0Sstevel@tonic-gate * 204*0Sstevel@tonic-gate * Returns 1 if found (in use), 0 otherwise. 205*0Sstevel@tonic-gate */ 206*0Sstevel@tonic-gate static int 207*0Sstevel@tonic-gate acct_find(vnode_t *vp, boolean_t compare_vfs) 208*0Sstevel@tonic-gate { 209*0Sstevel@tonic-gate struct acct_globals *ag; 210*0Sstevel@tonic-gate vnode_t *realvp; 211*0Sstevel@tonic-gate 212*0Sstevel@tonic-gate ASSERT(MUTEX_HELD(&acct_list_lock)); 213*0Sstevel@tonic-gate ASSERT(vp != NULL); 214*0Sstevel@tonic-gate 215*0Sstevel@tonic-gate if (VOP_REALVP(vp, &realvp)) 216*0Sstevel@tonic-gate realvp = vp; 217*0Sstevel@tonic-gate for (ag = list_head(&acct_list); ag != NULL; 218*0Sstevel@tonic-gate ag = list_next(&acct_list, ag)) { 219*0Sstevel@tonic-gate vnode_t *racctvp; 220*0Sstevel@tonic-gate boolean_t found = B_FALSE; 221*0Sstevel@tonic-gate 222*0Sstevel@tonic-gate mutex_enter(&ag->aclock); 223*0Sstevel@tonic-gate if (ag->acctvp == NULL) { 224*0Sstevel@tonic-gate mutex_exit(&ag->aclock); 225*0Sstevel@tonic-gate continue; 226*0Sstevel@tonic-gate } 227*0Sstevel@tonic-gate if (VOP_REALVP(ag->acctvp, &racctvp)) 228*0Sstevel@tonic-gate racctvp = ag->acctvp; 229*0Sstevel@tonic-gate if (compare_vfs) { 230*0Sstevel@tonic-gate if (racctvp->v_vfsp == realvp->v_vfsp) 231*0Sstevel@tonic-gate found = B_TRUE; 232*0Sstevel@tonic-gate } else { 233*0Sstevel@tonic-gate if (VN_CMP(realvp, racctvp)) 234*0Sstevel@tonic-gate found = B_TRUE; 235*0Sstevel@tonic-gate } 236*0Sstevel@tonic-gate mutex_exit(&ag->aclock); 237*0Sstevel@tonic-gate if (found) 238*0Sstevel@tonic-gate return (1); 239*0Sstevel@tonic-gate } 240*0Sstevel@tonic-gate return (0); 241*0Sstevel@tonic-gate } 242*0Sstevel@tonic-gate 243*0Sstevel@tonic-gate /* 244*0Sstevel@tonic-gate * Returns 1 if the vfs that vnode resides on is in use for the accounting 245*0Sstevel@tonic-gate * subsystem, 0 otherwise. 246*0Sstevel@tonic-gate */ 247*0Sstevel@tonic-gate int 248*0Sstevel@tonic-gate acct_fs_in_use(vnode_t *vp) 249*0Sstevel@tonic-gate { 250*0Sstevel@tonic-gate int found; 251*0Sstevel@tonic-gate 252*0Sstevel@tonic-gate if (vp == NULL) 253*0Sstevel@tonic-gate return (0); 254*0Sstevel@tonic-gate mutex_enter(&acct_list_lock); 255*0Sstevel@tonic-gate found = acct_find(vp, B_TRUE); 256*0Sstevel@tonic-gate mutex_exit(&acct_list_lock); 257*0Sstevel@tonic-gate return (found); 258*0Sstevel@tonic-gate } 259*0Sstevel@tonic-gate 260*0Sstevel@tonic-gate /* 261*0Sstevel@tonic-gate * Perform process accounting functions. 262*0Sstevel@tonic-gate */ 263*0Sstevel@tonic-gate int 264*0Sstevel@tonic-gate sysacct(char *fname) 265*0Sstevel@tonic-gate { 266*0Sstevel@tonic-gate struct acct_globals *ag; 267*0Sstevel@tonic-gate struct vnode *vp; 268*0Sstevel@tonic-gate int error = 0; 269*0Sstevel@tonic-gate 270*0Sstevel@tonic-gate if (secpolicy_acct(CRED()) != 0) 271*0Sstevel@tonic-gate return (set_errno(EPERM)); 272*0Sstevel@tonic-gate 273*0Sstevel@tonic-gate ag = zone_getspecific(acct_zone_key, curproc->p_zone); 274*0Sstevel@tonic-gate ASSERT(ag != NULL); 275*0Sstevel@tonic-gate 276*0Sstevel@tonic-gate if (fname == NULL) { 277*0Sstevel@tonic-gate /* 278*0Sstevel@tonic-gate * Close the file and stop accounting. 279*0Sstevel@tonic-gate */ 280*0Sstevel@tonic-gate mutex_enter(&ag->aclock); 281*0Sstevel@tonic-gate vp = ag->acctvp; 282*0Sstevel@tonic-gate ag->acctvp = NULL; 283*0Sstevel@tonic-gate mutex_exit(&ag->aclock); 284*0Sstevel@tonic-gate if (vp) { 285*0Sstevel@tonic-gate error = VOP_CLOSE(vp, FWRITE, 1, (offset_t)0, CRED()); 286*0Sstevel@tonic-gate VN_RELE(vp); 287*0Sstevel@tonic-gate } 288*0Sstevel@tonic-gate return (error == 0 ? 0 : set_errno(error)); 289*0Sstevel@tonic-gate } 290*0Sstevel@tonic-gate 291*0Sstevel@tonic-gate /* 292*0Sstevel@tonic-gate * Either (a) open a new file and begin accounting -or- (b) 293*0Sstevel@tonic-gate * switch accounting from an old to a new file. 294*0Sstevel@tonic-gate * 295*0Sstevel@tonic-gate * (Open the file without holding aclock in case it 296*0Sstevel@tonic-gate * sleeps (holding the lock prevents process exit).) 297*0Sstevel@tonic-gate */ 298*0Sstevel@tonic-gate if ((error = vn_open(fname, UIO_USERSPACE, FWRITE, 299*0Sstevel@tonic-gate 0, &vp, (enum create)0, 0)) != 0) { 300*0Sstevel@tonic-gate /* SVID compliance */ 301*0Sstevel@tonic-gate if (error == EISDIR) 302*0Sstevel@tonic-gate error = EACCES; 303*0Sstevel@tonic-gate return (set_errno(error)); 304*0Sstevel@tonic-gate } 305*0Sstevel@tonic-gate 306*0Sstevel@tonic-gate if (vp->v_type != VREG) { 307*0Sstevel@tonic-gate error = EACCES; 308*0Sstevel@tonic-gate } else { 309*0Sstevel@tonic-gate mutex_enter(&acct_list_lock); 310*0Sstevel@tonic-gate if (acct_find(vp, B_FALSE)) { 311*0Sstevel@tonic-gate error = EBUSY; 312*0Sstevel@tonic-gate } else { 313*0Sstevel@tonic-gate mutex_enter(&ag->aclock); 314*0Sstevel@tonic-gate if (ag->acctvp) { 315*0Sstevel@tonic-gate vnode_t *oldvp; 316*0Sstevel@tonic-gate 317*0Sstevel@tonic-gate /* 318*0Sstevel@tonic-gate * close old acctvp, and point acct() 319*0Sstevel@tonic-gate * at new file by swapping vp and acctvp 320*0Sstevel@tonic-gate */ 321*0Sstevel@tonic-gate oldvp = ag->acctvp; 322*0Sstevel@tonic-gate ag->acctvp = vp; 323*0Sstevel@tonic-gate vp = oldvp; 324*0Sstevel@tonic-gate } else { 325*0Sstevel@tonic-gate /* 326*0Sstevel@tonic-gate * no existing file, start accounting .. 327*0Sstevel@tonic-gate */ 328*0Sstevel@tonic-gate ag->acctvp = vp; 329*0Sstevel@tonic-gate vp = NULL; 330*0Sstevel@tonic-gate } 331*0Sstevel@tonic-gate mutex_exit(&ag->aclock); 332*0Sstevel@tonic-gate } 333*0Sstevel@tonic-gate mutex_exit(&acct_list_lock); 334*0Sstevel@tonic-gate } 335*0Sstevel@tonic-gate 336*0Sstevel@tonic-gate if (vp) { 337*0Sstevel@tonic-gate (void) VOP_CLOSE(vp, FWRITE, 1, (offset_t)0, CRED()); 338*0Sstevel@tonic-gate VN_RELE(vp); 339*0Sstevel@tonic-gate } 340*0Sstevel@tonic-gate return (error == 0 ? 0 : set_errno(error)); 341*0Sstevel@tonic-gate } 342*0Sstevel@tonic-gate 343*0Sstevel@tonic-gate /* 344*0Sstevel@tonic-gate * Produce a pseudo-floating point representation 345*0Sstevel@tonic-gate * with 3 bits base-8 exponent, 13 bits fraction. 346*0Sstevel@tonic-gate */ 347*0Sstevel@tonic-gate static comp_t 348*0Sstevel@tonic-gate acct_compress(ulong_t t) 349*0Sstevel@tonic-gate { 350*0Sstevel@tonic-gate int exp = 0, round = 0; 351*0Sstevel@tonic-gate 352*0Sstevel@tonic-gate while (t >= 8192) { 353*0Sstevel@tonic-gate exp++; 354*0Sstevel@tonic-gate round = t & 04; 355*0Sstevel@tonic-gate t >>= 3; 356*0Sstevel@tonic-gate } 357*0Sstevel@tonic-gate if (round) { 358*0Sstevel@tonic-gate t++; 359*0Sstevel@tonic-gate if (t >= 8192) { 360*0Sstevel@tonic-gate t >>= 3; 361*0Sstevel@tonic-gate exp++; 362*0Sstevel@tonic-gate } 363*0Sstevel@tonic-gate } 364*0Sstevel@tonic-gate #ifdef _LP64 365*0Sstevel@tonic-gate if (exp > 7) { 366*0Sstevel@tonic-gate /* prevent wraparound */ 367*0Sstevel@tonic-gate t = 8191; 368*0Sstevel@tonic-gate exp = 7; 369*0Sstevel@tonic-gate } 370*0Sstevel@tonic-gate #endif 371*0Sstevel@tonic-gate return ((exp << 13) + t); 372*0Sstevel@tonic-gate } 373*0Sstevel@tonic-gate 374*0Sstevel@tonic-gate /* 375*0Sstevel@tonic-gate * On exit, write a record on the accounting file. 376*0Sstevel@tonic-gate */ 377*0Sstevel@tonic-gate void 378*0Sstevel@tonic-gate acct(char st) 379*0Sstevel@tonic-gate { 380*0Sstevel@tonic-gate struct vnode *vp; 381*0Sstevel@tonic-gate struct cred *cr; 382*0Sstevel@tonic-gate struct proc *p; 383*0Sstevel@tonic-gate struct vattr va; 384*0Sstevel@tonic-gate ssize_t resid = 0; 385*0Sstevel@tonic-gate int error; 386*0Sstevel@tonic-gate struct acct_globals *ag; 387*0Sstevel@tonic-gate 388*0Sstevel@tonic-gate ag = zone_getspecific(acct_zone_key, curproc->p_zone); 389*0Sstevel@tonic-gate 390*0Sstevel@tonic-gate mutex_enter(&ag->aclock); 391*0Sstevel@tonic-gate if ((vp = ag->acctvp) == NULL) { 392*0Sstevel@tonic-gate mutex_exit(&ag->aclock); 393*0Sstevel@tonic-gate return; 394*0Sstevel@tonic-gate } 395*0Sstevel@tonic-gate 396*0Sstevel@tonic-gate /* 397*0Sstevel@tonic-gate * This only gets called from exit after all lwp's have exited so no 398*0Sstevel@tonic-gate * cred locking is needed. 399*0Sstevel@tonic-gate */ 400*0Sstevel@tonic-gate p = curproc; 401*0Sstevel@tonic-gate bcopy(u.u_comm, ag->acctbuf.ac_comm, sizeof (ag->acctbuf.ac_comm)); 402*0Sstevel@tonic-gate ag->acctbuf.ac_btime = u.u_start.tv_sec; 403*0Sstevel@tonic-gate ag->acctbuf.ac_utime = acct_compress( 404*0Sstevel@tonic-gate (comp_t)NSEC_TO_TICK(p->p_acct[LMS_USER])); 405*0Sstevel@tonic-gate ag->acctbuf.ac_stime = acct_compress( 406*0Sstevel@tonic-gate (comp_t)NSEC_TO_TICK(p->p_acct[LMS_SYSTEM] + p->p_acct[LMS_TRAP])); 407*0Sstevel@tonic-gate ag->acctbuf.ac_etime = acct_compress(lbolt - u.u_ticks); 408*0Sstevel@tonic-gate ag->acctbuf.ac_mem = acct_compress((ulong_t)u.u_mem); 409*0Sstevel@tonic-gate ag->acctbuf.ac_io = acct_compress((ulong_t)p->p_ru.ioch); 410*0Sstevel@tonic-gate ag->acctbuf.ac_rw = acct_compress((ulong_t)(p->p_ru.inblock + 411*0Sstevel@tonic-gate p->p_ru.oublock)); 412*0Sstevel@tonic-gate cr = CRED(); 413*0Sstevel@tonic-gate ag->acctbuf.ac_uid = crgetruid(cr); 414*0Sstevel@tonic-gate ag->acctbuf.ac_gid = crgetrgid(cr); 415*0Sstevel@tonic-gate (void) cmpldev(&ag->acctbuf.ac_tty, cttydev(p)); 416*0Sstevel@tonic-gate ag->acctbuf.ac_stat = st; 417*0Sstevel@tonic-gate ag->acctbuf.ac_flag = (u.u_acflag | AEXPND); 418*0Sstevel@tonic-gate 419*0Sstevel@tonic-gate /* 420*0Sstevel@tonic-gate * Save the size. If the write fails, reset the size to avoid 421*0Sstevel@tonic-gate * corrupted acct files. 422*0Sstevel@tonic-gate * 423*0Sstevel@tonic-gate * Large Files: We deliberately prevent accounting files from 424*0Sstevel@tonic-gate * exceeding the 2GB limit as none of the accounting commands are 425*0Sstevel@tonic-gate * currently large file aware. 426*0Sstevel@tonic-gate */ 427*0Sstevel@tonic-gate va.va_mask = AT_SIZE; 428*0Sstevel@tonic-gate if (VOP_GETATTR(vp, &va, 0, kcred) == 0) { 429*0Sstevel@tonic-gate error = vn_rdwr(UIO_WRITE, vp, (caddr_t)&ag->acctbuf, 430*0Sstevel@tonic-gate sizeof (ag->acctbuf), 0LL, UIO_SYSSPACE, FAPPEND, 431*0Sstevel@tonic-gate (rlim64_t)MAXOFF32_T, kcred, &resid); 432*0Sstevel@tonic-gate if (error || resid) 433*0Sstevel@tonic-gate (void) VOP_SETATTR(vp, &va, 0, kcred, NULL); 434*0Sstevel@tonic-gate } 435*0Sstevel@tonic-gate mutex_exit(&ag->aclock); 436*0Sstevel@tonic-gate } 437