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 #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <dirent.h> 30*0Sstevel@tonic-gate #include <stdlib.h> 31*0Sstevel@tonic-gate #include <stdio.h> 32*0Sstevel@tonic-gate #include <string.h> 33*0Sstevel@tonic-gate #include <synch.h> 34*0Sstevel@tonic-gate #include <unistd.h> 35*0Sstevel@tonic-gate #include <sys/errno.h> 36*0Sstevel@tonic-gate #include <sys/types.h> 37*0Sstevel@tonic-gate #include <sys/stat.h> 38*0Sstevel@tonic-gate #include <sys/vfstab.h> 39*0Sstevel@tonic-gate #include <fcntl.h> 40*0Sstevel@tonic-gate #include <sys/wait.h> 41*0Sstevel@tonic-gate #include <sys/fs/ufs_fs.h> 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate #include "libdiskmgt.h" 44*0Sstevel@tonic-gate #include "disks_private.h" 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate /* 47*0Sstevel@tonic-gate * The list of filesystem heuristic programs. 48*0Sstevel@tonic-gate */ 49*0Sstevel@tonic-gate struct heuristic { 50*0Sstevel@tonic-gate struct heuristic *next; 51*0Sstevel@tonic-gate char *prog; 52*0Sstevel@tonic-gate char *type; 53*0Sstevel@tonic-gate }; 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate struct vfstab_list { 56*0Sstevel@tonic-gate char *special; 57*0Sstevel@tonic-gate char *mountp; 58*0Sstevel@tonic-gate struct vfstab_list *next; 59*0Sstevel@tonic-gate }; 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate static struct vfstab_list *vfstab_listp = NULL; 62*0Sstevel@tonic-gate static mutex_t vfstab_lock = DEFAULTMUTEX; 63*0Sstevel@tonic-gate 64*0Sstevel@tonic-gate static time_t timestamp = 0; 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate static struct heuristic *hlist = NULL; 67*0Sstevel@tonic-gate static int initialized = 0; 68*0Sstevel@tonic-gate static mutex_t init_lock = DEFAULTMUTEX; 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate static int has_fs(char *prog, char *slice); 71*0Sstevel@tonic-gate static int load_heuristics(); 72*0Sstevel@tonic-gate static int add_use_record(struct vfstab *vp); 73*0Sstevel@tonic-gate static int load_vfstab(); 74*0Sstevel@tonic-gate static void free_vfstab(struct vfstab_list *listp); 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate /* 77*0Sstevel@tonic-gate * Use the heuristics to check for a filesystem on the slice. 78*0Sstevel@tonic-gate */ 79*0Sstevel@tonic-gate int 80*0Sstevel@tonic-gate inuse_fs(char *slice, nvlist_t *attrs, int *errp) 81*0Sstevel@tonic-gate { 82*0Sstevel@tonic-gate struct heuristic *hp; 83*0Sstevel@tonic-gate time_t curr_time; 84*0Sstevel@tonic-gate int found = 0; 85*0Sstevel@tonic-gate 86*0Sstevel@tonic-gate 87*0Sstevel@tonic-gate *errp = 0; 88*0Sstevel@tonic-gate 89*0Sstevel@tonic-gate if (slice == NULL) { 90*0Sstevel@tonic-gate return (0); 91*0Sstevel@tonic-gate } 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate /* 94*0Sstevel@tonic-gate * We get the list of heuristic programs one time. 95*0Sstevel@tonic-gate */ 96*0Sstevel@tonic-gate (void) mutex_lock(&init_lock); 97*0Sstevel@tonic-gate if (!initialized) { 98*0Sstevel@tonic-gate *errp = load_heuristics(); 99*0Sstevel@tonic-gate 100*0Sstevel@tonic-gate if (*errp == 0) { 101*0Sstevel@tonic-gate initialized = 1; 102*0Sstevel@tonic-gate } 103*0Sstevel@tonic-gate } 104*0Sstevel@tonic-gate (void) mutex_unlock(&init_lock); 105*0Sstevel@tonic-gate 106*0Sstevel@tonic-gate /* Run each of the heuristics. */ 107*0Sstevel@tonic-gate for (hp = hlist; hp; hp = hp->next) { 108*0Sstevel@tonic-gate if (has_fs(hp->prog, slice)) { 109*0Sstevel@tonic-gate libdiskmgt_add_str(attrs, DM_USED_BY, DM_USE_FS, errp); 110*0Sstevel@tonic-gate libdiskmgt_add_str(attrs, DM_USED_NAME, hp->type, errp); 111*0Sstevel@tonic-gate found = 1; 112*0Sstevel@tonic-gate } 113*0Sstevel@tonic-gate } 114*0Sstevel@tonic-gate 115*0Sstevel@tonic-gate if (*errp != 0) 116*0Sstevel@tonic-gate return (found); 117*0Sstevel@tonic-gate 118*0Sstevel@tonic-gate /* 119*0Sstevel@tonic-gate * Second heuristic used is the check for an entry in vfstab 120*0Sstevel@tonic-gate */ 121*0Sstevel@tonic-gate 122*0Sstevel@tonic-gate (void) mutex_lock(&vfstab_lock); 123*0Sstevel@tonic-gate curr_time = time(NULL); 124*0Sstevel@tonic-gate 125*0Sstevel@tonic-gate if (timestamp < curr_time && (curr_time - timestamp) > 60) { 126*0Sstevel@tonic-gate free_vfstab(vfstab_listp); 127*0Sstevel@tonic-gate *errp = load_vfstab(); 128*0Sstevel@tonic-gate timestamp = curr_time; 129*0Sstevel@tonic-gate } 130*0Sstevel@tonic-gate 131*0Sstevel@tonic-gate if (*errp == 0) { 132*0Sstevel@tonic-gate struct vfstab_list *listp; 133*0Sstevel@tonic-gate listp = vfstab_listp; 134*0Sstevel@tonic-gate 135*0Sstevel@tonic-gate while (listp != NULL) { 136*0Sstevel@tonic-gate if (strcmp(slice, listp->special) == 0) { 137*0Sstevel@tonic-gate char *mountp = ""; 138*0Sstevel@tonic-gate 139*0Sstevel@tonic-gate if (listp->mountp != NULL) 140*0Sstevel@tonic-gate mountp = listp->mountp; 141*0Sstevel@tonic-gate 142*0Sstevel@tonic-gate libdiskmgt_add_str(attrs, DM_USED_BY, DM_USE_VFSTAB, errp); 143*0Sstevel@tonic-gate libdiskmgt_add_str(attrs, DM_USED_NAME, mountp, errp); 144*0Sstevel@tonic-gate found = 1; 145*0Sstevel@tonic-gate break; 146*0Sstevel@tonic-gate } 147*0Sstevel@tonic-gate listp = listp->next; 148*0Sstevel@tonic-gate } 149*0Sstevel@tonic-gate } 150*0Sstevel@tonic-gate (void) mutex_unlock(&vfstab_lock); 151*0Sstevel@tonic-gate return (found); 152*0Sstevel@tonic-gate } 153*0Sstevel@tonic-gate 154*0Sstevel@tonic-gate static int 155*0Sstevel@tonic-gate has_fs(char *prog, char *slice) 156*0Sstevel@tonic-gate { 157*0Sstevel@tonic-gate pid_t pid; 158*0Sstevel@tonic-gate int loc; 159*0Sstevel@tonic-gate mode_t mode = S_IRUSR | S_IWUSR; 160*0Sstevel@tonic-gate 161*0Sstevel@tonic-gate switch ((pid = fork1())) { 162*0Sstevel@tonic-gate case 0: 163*0Sstevel@tonic-gate /* child process */ 164*0Sstevel@tonic-gate 165*0Sstevel@tonic-gate closefrom(1); 166*0Sstevel@tonic-gate (void) open("/dev/null", O_WRONLY, mode); 167*0Sstevel@tonic-gate (void) open("/dev/null", O_WRONLY, mode); 168*0Sstevel@tonic-gate (void) execl(prog, "fstyp", slice, NULL); 169*0Sstevel@tonic-gate _exit(1); 170*0Sstevel@tonic-gate break; 171*0Sstevel@tonic-gate 172*0Sstevel@tonic-gate case -1: 173*0Sstevel@tonic-gate return (0); 174*0Sstevel@tonic-gate 175*0Sstevel@tonic-gate default: 176*0Sstevel@tonic-gate /* parent process */ 177*0Sstevel@tonic-gate break; 178*0Sstevel@tonic-gate } 179*0Sstevel@tonic-gate 180*0Sstevel@tonic-gate (void) waitpid(pid, &loc, 0); 181*0Sstevel@tonic-gate 182*0Sstevel@tonic-gate if (WIFEXITED(loc) && WEXITSTATUS(loc) == 0) { 183*0Sstevel@tonic-gate return (1); 184*0Sstevel@tonic-gate } 185*0Sstevel@tonic-gate 186*0Sstevel@tonic-gate return (0); 187*0Sstevel@tonic-gate } 188*0Sstevel@tonic-gate 189*0Sstevel@tonic-gate /* 190*0Sstevel@tonic-gate * Create a list of filesystem heuristic programs. 191*0Sstevel@tonic-gate */ 192*0Sstevel@tonic-gate static int 193*0Sstevel@tonic-gate load_heuristics() 194*0Sstevel@tonic-gate { 195*0Sstevel@tonic-gate DIR *dirp; 196*0Sstevel@tonic-gate 197*0Sstevel@tonic-gate if ((dirp = opendir("/usr/lib/fs")) != NULL) { 198*0Sstevel@tonic-gate struct dirent *dp; 199*0Sstevel@tonic-gate 200*0Sstevel@tonic-gate while ((dp = readdir(dirp)) != NULL) { 201*0Sstevel@tonic-gate char path[MAXPATHLEN]; 202*0Sstevel@tonic-gate struct stat buf; 203*0Sstevel@tonic-gate DIR *subdirp; 204*0Sstevel@tonic-gate 205*0Sstevel@tonic-gate /* skip known dirs */ 206*0Sstevel@tonic-gate if (strcmp(dp->d_name, ".") == 0 || 207*0Sstevel@tonic-gate strcmp(dp->d_name, "..") == 0) { 208*0Sstevel@tonic-gate continue; 209*0Sstevel@tonic-gate } 210*0Sstevel@tonic-gate 211*0Sstevel@tonic-gate (void) snprintf(path, sizeof (path), "/usr/lib/fs/%s", 212*0Sstevel@tonic-gate dp->d_name); 213*0Sstevel@tonic-gate 214*0Sstevel@tonic-gate if (stat(path, &buf) != 0 || !(buf.st_mode & S_IFDIR)) { 215*0Sstevel@tonic-gate continue; 216*0Sstevel@tonic-gate } 217*0Sstevel@tonic-gate 218*0Sstevel@tonic-gate if ((subdirp = opendir(path)) != NULL) { 219*0Sstevel@tonic-gate struct dirent *sdp; 220*0Sstevel@tonic-gate 221*0Sstevel@tonic-gate while ((sdp = readdir(subdirp)) != NULL) { 222*0Sstevel@tonic-gate 223*0Sstevel@tonic-gate if (strcmp(sdp->d_name, "fstyp") == 0) { 224*0Sstevel@tonic-gate char progpath[MAXPATHLEN]; 225*0Sstevel@tonic-gate 226*0Sstevel@tonic-gate (void) snprintf(progpath, sizeof (progpath), 227*0Sstevel@tonic-gate "/usr/lib/fs/%s/fstyp", dp->d_name); 228*0Sstevel@tonic-gate 229*0Sstevel@tonic-gate if (stat(progpath, &buf) == 0 && 230*0Sstevel@tonic-gate buf.st_mode & S_IFREG) { 231*0Sstevel@tonic-gate 232*0Sstevel@tonic-gate struct heuristic *hp; 233*0Sstevel@tonic-gate 234*0Sstevel@tonic-gate hp = (struct heuristic *) 235*0Sstevel@tonic-gate malloc(sizeof (struct heuristic)); 236*0Sstevel@tonic-gate 237*0Sstevel@tonic-gate if (hp == NULL) { 238*0Sstevel@tonic-gate (void) closedir(subdirp); 239*0Sstevel@tonic-gate (void) closedir(dirp); 240*0Sstevel@tonic-gate return (ENOMEM); 241*0Sstevel@tonic-gate } 242*0Sstevel@tonic-gate 243*0Sstevel@tonic-gate if ((hp->prog = strdup(progpath)) == NULL) { 244*0Sstevel@tonic-gate (void) closedir(subdirp); 245*0Sstevel@tonic-gate (void) closedir(dirp); 246*0Sstevel@tonic-gate return (ENOMEM); 247*0Sstevel@tonic-gate } 248*0Sstevel@tonic-gate 249*0Sstevel@tonic-gate if ((hp->type = strdup(dp->d_name)) == NULL) { 250*0Sstevel@tonic-gate (void) closedir(subdirp); 251*0Sstevel@tonic-gate (void) closedir(dirp); 252*0Sstevel@tonic-gate return (ENOMEM); 253*0Sstevel@tonic-gate } 254*0Sstevel@tonic-gate 255*0Sstevel@tonic-gate hp->next = hlist; 256*0Sstevel@tonic-gate hlist = hp; 257*0Sstevel@tonic-gate } 258*0Sstevel@tonic-gate 259*0Sstevel@tonic-gate break; 260*0Sstevel@tonic-gate } 261*0Sstevel@tonic-gate } 262*0Sstevel@tonic-gate 263*0Sstevel@tonic-gate (void) closedir(subdirp); 264*0Sstevel@tonic-gate } 265*0Sstevel@tonic-gate } 266*0Sstevel@tonic-gate 267*0Sstevel@tonic-gate (void) closedir(dirp); 268*0Sstevel@tonic-gate } 269*0Sstevel@tonic-gate 270*0Sstevel@tonic-gate return (0); 271*0Sstevel@tonic-gate } 272*0Sstevel@tonic-gate 273*0Sstevel@tonic-gate static int 274*0Sstevel@tonic-gate load_vfstab() 275*0Sstevel@tonic-gate { 276*0Sstevel@tonic-gate FILE *fp; 277*0Sstevel@tonic-gate struct vfstab vp; 278*0Sstevel@tonic-gate int status = 1; 279*0Sstevel@tonic-gate 280*0Sstevel@tonic-gate fp = fopen(VFSTAB, "r"); 281*0Sstevel@tonic-gate if (fp != NULL) { 282*0Sstevel@tonic-gate (void) memset(&vp, 0, sizeof (struct vfstab)); 283*0Sstevel@tonic-gate while (getvfsent(fp, &vp) == 0) { 284*0Sstevel@tonic-gate status = add_use_record(&vp); 285*0Sstevel@tonic-gate if (status != 0) { 286*0Sstevel@tonic-gate (void) fclose(fp); 287*0Sstevel@tonic-gate return (status); 288*0Sstevel@tonic-gate } 289*0Sstevel@tonic-gate (void) memset(&vp, 0, sizeof (struct vfstab)); 290*0Sstevel@tonic-gate } 291*0Sstevel@tonic-gate (void) fclose(fp); 292*0Sstevel@tonic-gate status = 0; 293*0Sstevel@tonic-gate } 294*0Sstevel@tonic-gate 295*0Sstevel@tonic-gate return (status); 296*0Sstevel@tonic-gate } 297*0Sstevel@tonic-gate 298*0Sstevel@tonic-gate static int 299*0Sstevel@tonic-gate add_use_record(struct vfstab *vp) 300*0Sstevel@tonic-gate { 301*0Sstevel@tonic-gate struct vfstab_list *vfsp; 302*0Sstevel@tonic-gate 303*0Sstevel@tonic-gate vfsp = (struct vfstab_list *)malloc(sizeof (struct vfstab_list)); 304*0Sstevel@tonic-gate if (vfsp == NULL) { 305*0Sstevel@tonic-gate return (ENOMEM); 306*0Sstevel@tonic-gate } 307*0Sstevel@tonic-gate 308*0Sstevel@tonic-gate vfsp->special = strdup(vp->vfs_special); 309*0Sstevel@tonic-gate if (vfsp->special == NULL) { 310*0Sstevel@tonic-gate free(vfsp); 311*0Sstevel@tonic-gate return (ENOMEM); 312*0Sstevel@tonic-gate } 313*0Sstevel@tonic-gate 314*0Sstevel@tonic-gate if (vp->vfs_mountp != NULL) { 315*0Sstevel@tonic-gate vfsp->mountp = strdup(vp->vfs_mountp); 316*0Sstevel@tonic-gate if (vfsp->mountp == NULL) { 317*0Sstevel@tonic-gate free(vfsp); 318*0Sstevel@tonic-gate return (ENOMEM); 319*0Sstevel@tonic-gate } 320*0Sstevel@tonic-gate } else { 321*0Sstevel@tonic-gate vfsp->mountp = NULL; 322*0Sstevel@tonic-gate } 323*0Sstevel@tonic-gate 324*0Sstevel@tonic-gate vfsp->next = vfstab_listp; 325*0Sstevel@tonic-gate vfstab_listp = vfsp; 326*0Sstevel@tonic-gate 327*0Sstevel@tonic-gate return (0); 328*0Sstevel@tonic-gate } 329*0Sstevel@tonic-gate 330*0Sstevel@tonic-gate static void 331*0Sstevel@tonic-gate free_vfstab(struct vfstab_list *listp) 332*0Sstevel@tonic-gate { 333*0Sstevel@tonic-gate struct vfstab_list *nextp; 334*0Sstevel@tonic-gate 335*0Sstevel@tonic-gate while (listp != NULL) { 336*0Sstevel@tonic-gate nextp = listp->next; 337*0Sstevel@tonic-gate free((void *)listp->special); 338*0Sstevel@tonic-gate free((void *)listp->mountp); 339*0Sstevel@tonic-gate free((void *)listp); 340*0Sstevel@tonic-gate listp = nextp; 341*0Sstevel@tonic-gate } 342*0Sstevel@tonic-gate 343*0Sstevel@tonic-gate vfstab_listp = NULL; 344*0Sstevel@tonic-gate } 345