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 * University Copyright- Copyright (c) 1982, 1986, 1988 32*0Sstevel@tonic-gate * The Regents of the University of California 33*0Sstevel@tonic-gate * All Rights Reserved 34*0Sstevel@tonic-gate * 35*0Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from 36*0Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its 37*0Sstevel@tonic-gate * contributors. 38*0Sstevel@tonic-gate */ 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 41*0Sstevel@tonic-gate 42*0Sstevel@tonic-gate /* 43*0Sstevel@tonic-gate * Swap administrative interface 44*0Sstevel@tonic-gate * Used to add/delete/list swap devices. 45*0Sstevel@tonic-gate */ 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate #include <sys/types.h> 48*0Sstevel@tonic-gate #include <sys/dumpadm.h> 49*0Sstevel@tonic-gate #include <string.h> 50*0Sstevel@tonic-gate #include <stdio.h> 51*0Sstevel@tonic-gate #include <stdlib.h> 52*0Sstevel@tonic-gate #include <unistd.h> 53*0Sstevel@tonic-gate #include <errno.h> 54*0Sstevel@tonic-gate #include <sys/param.h> 55*0Sstevel@tonic-gate #include <dirent.h> 56*0Sstevel@tonic-gate #include <sys/swap.h> 57*0Sstevel@tonic-gate #include <sys/sysmacros.h> 58*0Sstevel@tonic-gate #include <sys/mkdev.h> 59*0Sstevel@tonic-gate #include <sys/stat.h> 60*0Sstevel@tonic-gate #include <sys/statvfs.h> 61*0Sstevel@tonic-gate #include <sys/uadmin.h> 62*0Sstevel@tonic-gate #include <vm/anon.h> 63*0Sstevel@tonic-gate #include <fcntl.h> 64*0Sstevel@tonic-gate #include <locale.h> 65*0Sstevel@tonic-gate #include <libintl.h> 66*0Sstevel@tonic-gate 67*0Sstevel@tonic-gate #define LFLAG 0x01 /* swap -l (list swap devices) */ 68*0Sstevel@tonic-gate #define DFLAG 0x02 /* swap -d (delete swap device) */ 69*0Sstevel@tonic-gate #define AFLAG 0x04 /* swap -a (add swap device) */ 70*0Sstevel@tonic-gate #define SFLAG 0x08 /* swap -s (swap info summary) */ 71*0Sstevel@tonic-gate #define P1FLAG 0x10 /* swap -1 (swapadd pass1; do not modify dump device) */ 72*0Sstevel@tonic-gate #define P2FLAG 0x20 /* swap -2 (swapadd pass2; do not modify dump device) */ 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gate static char *prognamep; 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate static int add(char *, off_t, off_t, int); 77*0Sstevel@tonic-gate static int delete(char *, off_t); 78*0Sstevel@tonic-gate static void usage(void); 79*0Sstevel@tonic-gate static int doswap(void); 80*0Sstevel@tonic-gate static int valid(char *, off_t, off_t); 81*0Sstevel@tonic-gate static int list(void); 82*0Sstevel@tonic-gate 83*0Sstevel@tonic-gate int 84*0Sstevel@tonic-gate main(int argc, char **argv) 85*0Sstevel@tonic-gate { 86*0Sstevel@tonic-gate int c, flag = 0; 87*0Sstevel@tonic-gate int ret; 88*0Sstevel@tonic-gate off_t s_offset = 0; 89*0Sstevel@tonic-gate off_t length = 0; 90*0Sstevel@tonic-gate char *pathname; 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate (void) setlocale(LC_ALL, ""); 93*0Sstevel@tonic-gate 94*0Sstevel@tonic-gate #if !defined(TEXT_DOMAIN) 95*0Sstevel@tonic-gate #define TEXT_DOMAIN "SYS_TEST" 96*0Sstevel@tonic-gate #endif 97*0Sstevel@tonic-gate (void) textdomain(TEXT_DOMAIN); 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate prognamep = argv[0]; 100*0Sstevel@tonic-gate if (argc < 2) { 101*0Sstevel@tonic-gate usage(); 102*0Sstevel@tonic-gate exit(1); 103*0Sstevel@tonic-gate } 104*0Sstevel@tonic-gate 105*0Sstevel@tonic-gate while ((c = getopt(argc, argv, "lsd:a:12")) != EOF) { 106*0Sstevel@tonic-gate char *char_p; 107*0Sstevel@tonic-gate switch (c) { 108*0Sstevel@tonic-gate case 'l': /* list all the swap devices */ 109*0Sstevel@tonic-gate if (argc != 2 || flag) { 110*0Sstevel@tonic-gate usage(); 111*0Sstevel@tonic-gate exit(1); 112*0Sstevel@tonic-gate } 113*0Sstevel@tonic-gate flag |= LFLAG; 114*0Sstevel@tonic-gate ret = list(); 115*0Sstevel@tonic-gate break; 116*0Sstevel@tonic-gate case 's': 117*0Sstevel@tonic-gate if (argc != 2 || flag) { 118*0Sstevel@tonic-gate usage(); 119*0Sstevel@tonic-gate exit(1); 120*0Sstevel@tonic-gate } 121*0Sstevel@tonic-gate flag |= SFLAG; 122*0Sstevel@tonic-gate ret = doswap(); 123*0Sstevel@tonic-gate break; 124*0Sstevel@tonic-gate case 'd': 125*0Sstevel@tonic-gate /* 126*0Sstevel@tonic-gate * The argument for starting offset is optional. 127*0Sstevel@tonic-gate * If no argument is specified, the entire swap file 128*0Sstevel@tonic-gate * is added although this will fail if a non-zero 129*0Sstevel@tonic-gate * starting offset was specified when added. 130*0Sstevel@tonic-gate */ 131*0Sstevel@tonic-gate if ((argc - optind) > 1 || flag != 0) { 132*0Sstevel@tonic-gate usage(); 133*0Sstevel@tonic-gate exit(1); 134*0Sstevel@tonic-gate } 135*0Sstevel@tonic-gate flag |= DFLAG; 136*0Sstevel@tonic-gate pathname = optarg; 137*0Sstevel@tonic-gate if (optind < argc) { 138*0Sstevel@tonic-gate errno = 0; 139*0Sstevel@tonic-gate s_offset = strtol(argv[optind++], &char_p, 10); 140*0Sstevel@tonic-gate if (errno != 0 || *char_p != '\0') { 141*0Sstevel@tonic-gate (void) fprintf(stderr, 142*0Sstevel@tonic-gate gettext("error in [low block]\n")); 143*0Sstevel@tonic-gate exit(1); 144*0Sstevel@tonic-gate } 145*0Sstevel@tonic-gate } 146*0Sstevel@tonic-gate ret = delete(pathname, s_offset); 147*0Sstevel@tonic-gate break; 148*0Sstevel@tonic-gate 149*0Sstevel@tonic-gate case 'a': 150*0Sstevel@tonic-gate /* 151*0Sstevel@tonic-gate * The arguments for starting offset and number of 152*0Sstevel@tonic-gate * blocks are optional. If only the starting offset 153*0Sstevel@tonic-gate * is specified, all the blocks to the end of the swap 154*0Sstevel@tonic-gate * file will be added. If no starting offset is 155*0Sstevel@tonic-gate * specified, the entire swap file is assumed. 156*0Sstevel@tonic-gate */ 157*0Sstevel@tonic-gate if ((argc - optind) > 2 || 158*0Sstevel@tonic-gate (flag & ~(P1FLAG | P2FLAG)) != 0) { 159*0Sstevel@tonic-gate usage(); 160*0Sstevel@tonic-gate exit(1); 161*0Sstevel@tonic-gate } 162*0Sstevel@tonic-gate if (*optarg != '/') { 163*0Sstevel@tonic-gate (void) fprintf(stderr, 164*0Sstevel@tonic-gate gettext("%s: path must be absolute\n"), 165*0Sstevel@tonic-gate prognamep); 166*0Sstevel@tonic-gate exit(1); 167*0Sstevel@tonic-gate } 168*0Sstevel@tonic-gate flag |= AFLAG; 169*0Sstevel@tonic-gate pathname = optarg; 170*0Sstevel@tonic-gate if (optind < argc) { 171*0Sstevel@tonic-gate errno = 0; 172*0Sstevel@tonic-gate s_offset = strtol(argv[optind++], &char_p, 10); 173*0Sstevel@tonic-gate if (errno != 0 || *char_p != '\0') { 174*0Sstevel@tonic-gate (void) fprintf(stderr, 175*0Sstevel@tonic-gate gettext("error in [low block]\n")); 176*0Sstevel@tonic-gate exit(1); 177*0Sstevel@tonic-gate } 178*0Sstevel@tonic-gate } 179*0Sstevel@tonic-gate if (optind < argc) { 180*0Sstevel@tonic-gate errno = 0; 181*0Sstevel@tonic-gate length = strtol(argv[optind++], &char_p, 10); 182*0Sstevel@tonic-gate if (errno != 0 || *char_p != '\0') { 183*0Sstevel@tonic-gate (void) fprintf(stderr, 184*0Sstevel@tonic-gate gettext("error in [nbr of blocks]\n")); 185*0Sstevel@tonic-gate exit(1); 186*0Sstevel@tonic-gate } 187*0Sstevel@tonic-gate } 188*0Sstevel@tonic-gate if ((ret = valid(pathname, 189*0Sstevel@tonic-gate s_offset * 512, length * 512)) == 0) 190*0Sstevel@tonic-gate ret = add(pathname, s_offset, length, flag); 191*0Sstevel@tonic-gate break; 192*0Sstevel@tonic-gate 193*0Sstevel@tonic-gate case '1': 194*0Sstevel@tonic-gate flag |= P1FLAG; 195*0Sstevel@tonic-gate break; 196*0Sstevel@tonic-gate 197*0Sstevel@tonic-gate case '2': 198*0Sstevel@tonic-gate flag |= P2FLAG; 199*0Sstevel@tonic-gate break; 200*0Sstevel@tonic-gate 201*0Sstevel@tonic-gate case '?': 202*0Sstevel@tonic-gate usage(); 203*0Sstevel@tonic-gate exit(1); 204*0Sstevel@tonic-gate } 205*0Sstevel@tonic-gate } 206*0Sstevel@tonic-gate if (!flag) { 207*0Sstevel@tonic-gate usage(); 208*0Sstevel@tonic-gate exit(1); 209*0Sstevel@tonic-gate } 210*0Sstevel@tonic-gate return (ret); 211*0Sstevel@tonic-gate } 212*0Sstevel@tonic-gate 213*0Sstevel@tonic-gate 214*0Sstevel@tonic-gate static void 215*0Sstevel@tonic-gate usage(void) 216*0Sstevel@tonic-gate { 217*0Sstevel@tonic-gate (void) fprintf(stderr, gettext("Usage:\t%s -l\n"), prognamep); 218*0Sstevel@tonic-gate (void) fprintf(stderr, "\t%s -s\n", prognamep); 219*0Sstevel@tonic-gate (void) fprintf(stderr, gettext("\t%s -d <file name> [low block]\n"), 220*0Sstevel@tonic-gate prognamep); 221*0Sstevel@tonic-gate (void) fprintf(stderr, gettext("\t%s -a <file name> [low block]" 222*0Sstevel@tonic-gate " [nbr of blocks]\n"), prognamep); 223*0Sstevel@tonic-gate } 224*0Sstevel@tonic-gate 225*0Sstevel@tonic-gate /* 226*0Sstevel@tonic-gate * Implement: 227*0Sstevel@tonic-gate * #define ctok(x) ((ctob(x))>>10) 228*0Sstevel@tonic-gate * in a machine independent way. (Both assume a click > 1k) 229*0Sstevel@tonic-gate */ 230*0Sstevel@tonic-gate static size_t 231*0Sstevel@tonic-gate ctok(pgcnt_t clicks) 232*0Sstevel@tonic-gate { 233*0Sstevel@tonic-gate static int factor = -1; 234*0Sstevel@tonic-gate 235*0Sstevel@tonic-gate if (factor == -1) 236*0Sstevel@tonic-gate factor = (int)(sysconf(_SC_PAGESIZE) >> 10); 237*0Sstevel@tonic-gate return ((size_t)(clicks * factor)); 238*0Sstevel@tonic-gate } 239*0Sstevel@tonic-gate 240*0Sstevel@tonic-gate 241*0Sstevel@tonic-gate static int 242*0Sstevel@tonic-gate doswap(void) 243*0Sstevel@tonic-gate { 244*0Sstevel@tonic-gate struct anoninfo ai; 245*0Sstevel@tonic-gate pgcnt_t allocated, reserved, available; 246*0Sstevel@tonic-gate 247*0Sstevel@tonic-gate /* 248*0Sstevel@tonic-gate * max = total amount of swap space including physical memory 249*0Sstevel@tonic-gate * ai.ani_max = MAX(anoninfo.ani_resv, anoninfo.ani_max) + 250*0Sstevel@tonic-gate * availrmem - swapfs_minfree; 251*0Sstevel@tonic-gate * ai.ani_free = amount of unallocated anonymous memory 252*0Sstevel@tonic-gate * (ie. = resverved_unallocated + unreserved) 253*0Sstevel@tonic-gate * ai.ani_free = anoninfo.ani_free + (availrmem - swapfs_minfree); 254*0Sstevel@tonic-gate * ai.ani_resv = total amount of reserved anonymous memory 255*0Sstevel@tonic-gate * ai.ani_resv = anoninfo.ani_resv; 256*0Sstevel@tonic-gate * 257*0Sstevel@tonic-gate * allocated = anon memory not free 258*0Sstevel@tonic-gate * reserved = anon memory reserved but not allocated 259*0Sstevel@tonic-gate * available = anon memory not reserved 260*0Sstevel@tonic-gate */ 261*0Sstevel@tonic-gate if (swapctl(SC_AINFO, &ai) == -1) { 262*0Sstevel@tonic-gate perror(prognamep); 263*0Sstevel@tonic-gate return (2); 264*0Sstevel@tonic-gate } 265*0Sstevel@tonic-gate 266*0Sstevel@tonic-gate allocated = ai.ani_max - ai.ani_free; 267*0Sstevel@tonic-gate reserved = ai.ani_resv - allocated; 268*0Sstevel@tonic-gate available = ai.ani_max - ai.ani_resv; 269*0Sstevel@tonic-gate 270*0Sstevel@tonic-gate /* 271*0Sstevel@tonic-gate * TRANSLATION_NOTE 272*0Sstevel@tonic-gate * Translations (if any) of these keywords should match with 273*0Sstevel@tonic-gate * translations (if any) of the swap.1M man page keywords for 274*0Sstevel@tonic-gate * -s option: "allocated", "reserved", "used", "available" 275*0Sstevel@tonic-gate */ 276*0Sstevel@tonic-gate (void) printf(gettext("total: %luk bytes allocated + %luk reserved = \ 277*0Sstevel@tonic-gate %luk used, %luk available\n"), 278*0Sstevel@tonic-gate ctok(allocated), ctok(reserved), ctok(reserved) + ctok(allocated), 279*0Sstevel@tonic-gate ctok(available)); 280*0Sstevel@tonic-gate 281*0Sstevel@tonic-gate return (0); 282*0Sstevel@tonic-gate } 283*0Sstevel@tonic-gate 284*0Sstevel@tonic-gate static int 285*0Sstevel@tonic-gate list(void) 286*0Sstevel@tonic-gate { 287*0Sstevel@tonic-gate struct swaptable *st; 288*0Sstevel@tonic-gate struct swapent *swapent; 289*0Sstevel@tonic-gate int i; 290*0Sstevel@tonic-gate struct stat64 statbuf; 291*0Sstevel@tonic-gate char *path; 292*0Sstevel@tonic-gate char fullpath[MAXPATHLEN+1]; 293*0Sstevel@tonic-gate int num; 294*0Sstevel@tonic-gate 295*0Sstevel@tonic-gate if ((num = swapctl(SC_GETNSWP, NULL)) == -1) { 296*0Sstevel@tonic-gate perror(prognamep); 297*0Sstevel@tonic-gate return (2); 298*0Sstevel@tonic-gate } 299*0Sstevel@tonic-gate if (num == 0) { 300*0Sstevel@tonic-gate (void) fprintf(stderr, gettext("No swap devices configured\n")); 301*0Sstevel@tonic-gate return (1); 302*0Sstevel@tonic-gate } 303*0Sstevel@tonic-gate 304*0Sstevel@tonic-gate if ((st = malloc(num * sizeof (swapent_t) + sizeof (int))) 305*0Sstevel@tonic-gate == NULL) { 306*0Sstevel@tonic-gate (void) fprintf(stderr, 307*0Sstevel@tonic-gate gettext("Malloc failed. Please try later.\n")); 308*0Sstevel@tonic-gate perror(prognamep); 309*0Sstevel@tonic-gate return (2); 310*0Sstevel@tonic-gate } 311*0Sstevel@tonic-gate if ((path = malloc(num * MAXPATHLEN)) == NULL) { 312*0Sstevel@tonic-gate (void) fprintf(stderr, 313*0Sstevel@tonic-gate gettext("Malloc failed. Please try later.\n")); 314*0Sstevel@tonic-gate perror(prognamep); 315*0Sstevel@tonic-gate return (2); 316*0Sstevel@tonic-gate } 317*0Sstevel@tonic-gate swapent = st->swt_ent; 318*0Sstevel@tonic-gate for (i = 0; i < num; i++, swapent++) { 319*0Sstevel@tonic-gate swapent->ste_path = path; 320*0Sstevel@tonic-gate path += MAXPATHLEN; 321*0Sstevel@tonic-gate } 322*0Sstevel@tonic-gate 323*0Sstevel@tonic-gate st->swt_n = num; 324*0Sstevel@tonic-gate if ((num = swapctl(SC_LIST, st)) == -1) { 325*0Sstevel@tonic-gate perror(prognamep); 326*0Sstevel@tonic-gate return (2); 327*0Sstevel@tonic-gate } 328*0Sstevel@tonic-gate 329*0Sstevel@tonic-gate /* 330*0Sstevel@tonic-gate * TRANSLATION_NOTE 331*0Sstevel@tonic-gate * Following translations for "swap -l" should account for for 332*0Sstevel@tonic-gate * alignment of header and output. 333*0Sstevel@tonic-gate * The first translation is for the header. If the alignment 334*0Sstevel@tonic-gate * of the header changes, change the next 5 formats as needed 335*0Sstevel@tonic-gate * to make alignment of output agree with alignment of the header. 336*0Sstevel@tonic-gate * The next four translations are four cases for printing the 337*0Sstevel@tonic-gate * 1st & 2nd fields. 338*0Sstevel@tonic-gate * The next translation is for printing the 3rd, 4th & 5th fields. 339*0Sstevel@tonic-gate * 340*0Sstevel@tonic-gate * Translations (if any) of the following keywords should match the 341*0Sstevel@tonic-gate * translations (if any) of the swap.1M man page keywords for 342*0Sstevel@tonic-gate * -l option: "swapfile", "dev", "swaplo", "blocks", "free" 343*0Sstevel@tonic-gate */ 344*0Sstevel@tonic-gate (void) printf( 345*0Sstevel@tonic-gate gettext("swapfile dev swaplo blocks free\n")); 346*0Sstevel@tonic-gate 347*0Sstevel@tonic-gate swapent = st->swt_ent; 348*0Sstevel@tonic-gate for (i = 0; i < num; i++, swapent++) { 349*0Sstevel@tonic-gate if (*swapent->ste_path != '/') 350*0Sstevel@tonic-gate (void) snprintf(fullpath, sizeof (fullpath), 351*0Sstevel@tonic-gate "/dev/%s", swapent->ste_path); 352*0Sstevel@tonic-gate else 353*0Sstevel@tonic-gate (void) snprintf(fullpath, sizeof (fullpath), 354*0Sstevel@tonic-gate "%s", swapent->ste_path); 355*0Sstevel@tonic-gate if (stat64(fullpath, &statbuf) < 0) 356*0Sstevel@tonic-gate if (*swapent->ste_path != '/') 357*0Sstevel@tonic-gate (void) printf(gettext("%-20s - "), 358*0Sstevel@tonic-gate swapent->ste_path); 359*0Sstevel@tonic-gate else 360*0Sstevel@tonic-gate (void) printf(gettext("%-20s ?,? "), 361*0Sstevel@tonic-gate fullpath); 362*0Sstevel@tonic-gate else { 363*0Sstevel@tonic-gate if (statbuf.st_mode & (S_IFBLK | S_IFCHR)) 364*0Sstevel@tonic-gate (void) printf(gettext("%-19s %2lu,%-2lu"), 365*0Sstevel@tonic-gate fullpath, 366*0Sstevel@tonic-gate major(statbuf.st_rdev), 367*0Sstevel@tonic-gate minor(statbuf.st_rdev)); 368*0Sstevel@tonic-gate else 369*0Sstevel@tonic-gate (void) printf(gettext("%-20s - "), fullpath); 370*0Sstevel@tonic-gate } 371*0Sstevel@tonic-gate { 372*0Sstevel@tonic-gate int diskblks_per_page = 373*0Sstevel@tonic-gate (int)(sysconf(_SC_PAGESIZE) >> DEV_BSHIFT); 374*0Sstevel@tonic-gate (void) printf(gettext(" %6lu %6lu %6lu"), swapent->ste_start, 375*0Sstevel@tonic-gate swapent->ste_pages * diskblks_per_page, 376*0Sstevel@tonic-gate swapent->ste_free * diskblks_per_page); 377*0Sstevel@tonic-gate } 378*0Sstevel@tonic-gate if (swapent->ste_flags & ST_INDEL) 379*0Sstevel@tonic-gate (void) printf(" INDEL\n"); 380*0Sstevel@tonic-gate else 381*0Sstevel@tonic-gate (void) printf("\n"); 382*0Sstevel@tonic-gate } 383*0Sstevel@tonic-gate return (0); 384*0Sstevel@tonic-gate } 385*0Sstevel@tonic-gate 386*0Sstevel@tonic-gate static void 387*0Sstevel@tonic-gate dumpadm_err(const char *warning) 388*0Sstevel@tonic-gate { 389*0Sstevel@tonic-gate (void) fprintf(stderr, "%s (%s):\n", warning, strerror(errno)); 390*0Sstevel@tonic-gate (void) fprintf(stderr, gettext( 391*0Sstevel@tonic-gate "run dumpadm(1M) to verify dump configuration\n")); 392*0Sstevel@tonic-gate } 393*0Sstevel@tonic-gate 394*0Sstevel@tonic-gate static int 395*0Sstevel@tonic-gate delete(char *path, off_t offset) 396*0Sstevel@tonic-gate { 397*0Sstevel@tonic-gate swapres_t swr; 398*0Sstevel@tonic-gate int fd; 399*0Sstevel@tonic-gate 400*0Sstevel@tonic-gate swr.sr_name = path; 401*0Sstevel@tonic-gate swr.sr_start = offset; 402*0Sstevel@tonic-gate 403*0Sstevel@tonic-gate if (swapctl(SC_REMOVE, &swr) < 0) { 404*0Sstevel@tonic-gate switch (errno) { 405*0Sstevel@tonic-gate case (ENOSYS): 406*0Sstevel@tonic-gate (void) fprintf(stderr, gettext( 407*0Sstevel@tonic-gate "%s: Invalid operation for this filesystem type\n"), 408*0Sstevel@tonic-gate path); 409*0Sstevel@tonic-gate break; 410*0Sstevel@tonic-gate default: 411*0Sstevel@tonic-gate perror(path); 412*0Sstevel@tonic-gate break; 413*0Sstevel@tonic-gate } 414*0Sstevel@tonic-gate return (2); 415*0Sstevel@tonic-gate } 416*0Sstevel@tonic-gate 417*0Sstevel@tonic-gate /* 418*0Sstevel@tonic-gate * If our swap -d succeeded, open up /dev/dump and ask what the dump 419*0Sstevel@tonic-gate * device is set to. If this returns ENODEV, we just deleted the 420*0Sstevel@tonic-gate * dump device, so try to change the dump device to another swap 421*0Sstevel@tonic-gate * device. We do this by firing up /usr/sbin/dumpadm -ud swap. 422*0Sstevel@tonic-gate */ 423*0Sstevel@tonic-gate if ((fd = open("/dev/dump", O_RDONLY)) >= 0) { 424*0Sstevel@tonic-gate char dumpdev[MAXPATHLEN]; 425*0Sstevel@tonic-gate 426*0Sstevel@tonic-gate if (ioctl(fd, DIOCGETDEV, dumpdev) == -1) { 427*0Sstevel@tonic-gate if (errno == ENODEV) { 428*0Sstevel@tonic-gate (void) printf(gettext("%s was dump device --\n" 429*0Sstevel@tonic-gate "invoking dumpadm(1M) -d swap to " 430*0Sstevel@tonic-gate "select new dump device\n"), path); 431*0Sstevel@tonic-gate /* 432*0Sstevel@tonic-gate * Close /dev/dump prior to executing dumpadm 433*0Sstevel@tonic-gate * since /dev/dump mandates exclusive open. 434*0Sstevel@tonic-gate */ 435*0Sstevel@tonic-gate (void) close(fd); 436*0Sstevel@tonic-gate 437*0Sstevel@tonic-gate if (system("/usr/sbin/dumpadm -ud swap") == -1) 438*0Sstevel@tonic-gate dumpadm_err(gettext( 439*0Sstevel@tonic-gate "Warning: failed to execute dumpadm -d swap")); 440*0Sstevel@tonic-gate } else 441*0Sstevel@tonic-gate dumpadm_err(gettext( 442*0Sstevel@tonic-gate "Warning: failed to check dump device")); 443*0Sstevel@tonic-gate } 444*0Sstevel@tonic-gate (void) close(fd); 445*0Sstevel@tonic-gate } else 446*0Sstevel@tonic-gate dumpadm_err(gettext("Warning: failed to open /dev/dump")); 447*0Sstevel@tonic-gate 448*0Sstevel@tonic-gate return (0); 449*0Sstevel@tonic-gate } 450*0Sstevel@tonic-gate 451*0Sstevel@tonic-gate /* 452*0Sstevel@tonic-gate * swapres_t structure units are in 512-blocks 453*0Sstevel@tonic-gate */ 454*0Sstevel@tonic-gate static int 455*0Sstevel@tonic-gate add(char *path, off_t offset, off_t cnt, int flags) 456*0Sstevel@tonic-gate { 457*0Sstevel@tonic-gate swapres_t swr; 458*0Sstevel@tonic-gate 459*0Sstevel@tonic-gate int fd, have_dumpdev = 1; 460*0Sstevel@tonic-gate struct statvfs fsb; 461*0Sstevel@tonic-gate 462*0Sstevel@tonic-gate /* 463*0Sstevel@tonic-gate * Before adding swap, we first check to see if we have a dump 464*0Sstevel@tonic-gate * device configured. If we don't (errno == ENODEV), and if 465*0Sstevel@tonic-gate * our SC_ADD is successful, then run /usr/sbin/dumpadm -ud swap 466*0Sstevel@tonic-gate * to attempt to reconfigure the dump device to the new swap. 467*0Sstevel@tonic-gate */ 468*0Sstevel@tonic-gate if ((fd = open("/dev/dump", O_RDONLY)) >= 0) { 469*0Sstevel@tonic-gate char dumpdev[MAXPATHLEN]; 470*0Sstevel@tonic-gate 471*0Sstevel@tonic-gate if (ioctl(fd, DIOCGETDEV, dumpdev) == -1) { 472*0Sstevel@tonic-gate if (errno == ENODEV) 473*0Sstevel@tonic-gate have_dumpdev = 0; 474*0Sstevel@tonic-gate else 475*0Sstevel@tonic-gate dumpadm_err(gettext( 476*0Sstevel@tonic-gate "Warning: failed to check dump device")); 477*0Sstevel@tonic-gate } 478*0Sstevel@tonic-gate 479*0Sstevel@tonic-gate (void) close(fd); 480*0Sstevel@tonic-gate 481*0Sstevel@tonic-gate } else if (!(flags & P1FLAG)) 482*0Sstevel@tonic-gate dumpadm_err(gettext("Warning: failed to open /dev/dump")); 483*0Sstevel@tonic-gate 484*0Sstevel@tonic-gate swr.sr_name = path; 485*0Sstevel@tonic-gate swr.sr_start = offset; 486*0Sstevel@tonic-gate swr.sr_length = cnt; 487*0Sstevel@tonic-gate 488*0Sstevel@tonic-gate if (swapctl(SC_ADD, &swr) < 0) { 489*0Sstevel@tonic-gate switch (errno) { 490*0Sstevel@tonic-gate case (ENOSYS): 491*0Sstevel@tonic-gate (void) fprintf(stderr, gettext( 492*0Sstevel@tonic-gate "%s: Invalid operation for this filesystem type\n"), 493*0Sstevel@tonic-gate path); 494*0Sstevel@tonic-gate break; 495*0Sstevel@tonic-gate case (EEXIST): 496*0Sstevel@tonic-gate (void) fprintf(stderr, gettext( 497*0Sstevel@tonic-gate "%s: Overlapping swap files are not allowed\n"), 498*0Sstevel@tonic-gate path); 499*0Sstevel@tonic-gate break; 500*0Sstevel@tonic-gate default: 501*0Sstevel@tonic-gate perror(path); 502*0Sstevel@tonic-gate break; 503*0Sstevel@tonic-gate } 504*0Sstevel@tonic-gate return (2); 505*0Sstevel@tonic-gate } 506*0Sstevel@tonic-gate 507*0Sstevel@tonic-gate /* 508*0Sstevel@tonic-gate * If the swapctl worked and we don't have a dump device, and /etc 509*0Sstevel@tonic-gate * is part of a writeable filesystem, then run dumpadm -ud swap. 510*0Sstevel@tonic-gate * If /etc (presumably part of /) is still mounted read-only, then 511*0Sstevel@tonic-gate * dumpadm will fail to write its config file, so there's no point 512*0Sstevel@tonic-gate * running it now. This also avoids spurious messages during boot 513*0Sstevel@tonic-gate * when the first swapadd takes place, at which point / is still ro. 514*0Sstevel@tonic-gate * Similarly, if swapadd invoked us with -1 or -2 (but root is 515*0Sstevel@tonic-gate * writeable), we don't want to modify the dump device because 516*0Sstevel@tonic-gate * /etc/init.d/savecore has yet to execute; if we run dumpadm now 517*0Sstevel@tonic-gate * we would lose the user's previous setting. 518*0Sstevel@tonic-gate */ 519*0Sstevel@tonic-gate if (!have_dumpdev && !(flags & (P1FLAG | P2FLAG)) && 520*0Sstevel@tonic-gate statvfs("/etc", &fsb) == 0 && !(fsb.f_flag & ST_RDONLY)) { 521*0Sstevel@tonic-gate 522*0Sstevel@tonic-gate (void) printf( 523*0Sstevel@tonic-gate gettext("operating system crash dump was previously " 524*0Sstevel@tonic-gate "disabled --\ninvoking dumpadm(1M) -d swap to select " 525*0Sstevel@tonic-gate "new dump device\n")); 526*0Sstevel@tonic-gate 527*0Sstevel@tonic-gate if (system("/usr/sbin/dumpadm -ud swap") == -1) 528*0Sstevel@tonic-gate dumpadm_err(gettext( 529*0Sstevel@tonic-gate "Warning: failed to execute dumpadm -d swap")); 530*0Sstevel@tonic-gate } 531*0Sstevel@tonic-gate 532*0Sstevel@tonic-gate return (0); 533*0Sstevel@tonic-gate } 534*0Sstevel@tonic-gate 535*0Sstevel@tonic-gate static int 536*0Sstevel@tonic-gate valid(char *pathname, off_t offset, off_t length) 537*0Sstevel@tonic-gate { 538*0Sstevel@tonic-gate struct stat64 f; 539*0Sstevel@tonic-gate struct statvfs64 fs; 540*0Sstevel@tonic-gate off_t need; 541*0Sstevel@tonic-gate 542*0Sstevel@tonic-gate if (stat64(pathname, &f) < 0 || statvfs64(pathname, &fs) < 0) { 543*0Sstevel@tonic-gate (void) perror(pathname); 544*0Sstevel@tonic-gate return (errno); 545*0Sstevel@tonic-gate } 546*0Sstevel@tonic-gate 547*0Sstevel@tonic-gate if (!((S_ISREG(f.st_mode) && (f.st_mode & S_ISVTX) == S_ISVTX) || 548*0Sstevel@tonic-gate S_ISBLK(f.st_mode))) { 549*0Sstevel@tonic-gate (void) fprintf(stderr, 550*0Sstevel@tonic-gate gettext("\"%s\" is not valid for swapping.\n" 551*0Sstevel@tonic-gate "It must be a block device or a regular file with the\n" 552*0Sstevel@tonic-gate "\"save user text on execution\" bit set.\n"), 553*0Sstevel@tonic-gate pathname); 554*0Sstevel@tonic-gate return (EINVAL); 555*0Sstevel@tonic-gate } 556*0Sstevel@tonic-gate 557*0Sstevel@tonic-gate if (S_ISREG(f.st_mode)) { 558*0Sstevel@tonic-gate if (length == 0) 559*0Sstevel@tonic-gate length = (off_t)f.st_size; 560*0Sstevel@tonic-gate 561*0Sstevel@tonic-gate /* 562*0Sstevel@tonic-gate * "f.st_blocks < 8" because the first eight 563*0Sstevel@tonic-gate * 512-byte sectors are always skipped 564*0Sstevel@tonic-gate */ 565*0Sstevel@tonic-gate 566*0Sstevel@tonic-gate if (f.st_size < (length - offset) || f.st_size == 0 || 567*0Sstevel@tonic-gate f.st_size > MAXOFF_T || f.st_blocks < 8 || length < 0) { 568*0Sstevel@tonic-gate (void) fprintf(stderr, gettext("%s: size is invalid\n"), 569*0Sstevel@tonic-gate pathname); 570*0Sstevel@tonic-gate return (EINVAL); 571*0Sstevel@tonic-gate } 572*0Sstevel@tonic-gate 573*0Sstevel@tonic-gate if (offset < 0) { 574*0Sstevel@tonic-gate (void) fprintf(stderr, 575*0Sstevel@tonic-gate gettext("%s: low block is invalid\n"), 576*0Sstevel@tonic-gate pathname); 577*0Sstevel@tonic-gate return (EINVAL); 578*0Sstevel@tonic-gate } 579*0Sstevel@tonic-gate 580*0Sstevel@tonic-gate need = roundup(length, fs.f_bsize) / DEV_BSIZE; 581*0Sstevel@tonic-gate 582*0Sstevel@tonic-gate /* 583*0Sstevel@tonic-gate * "need > f.st_blocks" to account for indirect blocks 584*0Sstevel@tonic-gate * Note: 585*0Sstevel@tonic-gate * This can be fooled by a file large enough to 586*0Sstevel@tonic-gate * contain indirect blocks that also contains holes. 587*0Sstevel@tonic-gate * However, we don't know (and don't want to know) 588*0Sstevel@tonic-gate * about the underlying storage implementation. 589*0Sstevel@tonic-gate * But, if it doesn't have at least this many blocks, 590*0Sstevel@tonic-gate * there must be a hole. 591*0Sstevel@tonic-gate */ 592*0Sstevel@tonic-gate 593*0Sstevel@tonic-gate if (need > f.st_blocks) { 594*0Sstevel@tonic-gate (void) fprintf(stderr, gettext( 595*0Sstevel@tonic-gate "\"%s\" may contain holes - can't swap on it.\n"), 596*0Sstevel@tonic-gate pathname); 597*0Sstevel@tonic-gate return (EINVAL); 598*0Sstevel@tonic-gate } 599*0Sstevel@tonic-gate } 600*0Sstevel@tonic-gate /* 601*0Sstevel@tonic-gate * else, we cannot get st_size for S_ISBLK device and 602*0Sstevel@tonic-gate * no meaningful checking can be done. 603*0Sstevel@tonic-gate */ 604*0Sstevel@tonic-gate 605*0Sstevel@tonic-gate return (0); 606*0Sstevel@tonic-gate } 607